Статті в журналах: "Collector Base Capacity"

1

Kuzmenkov, D. M., A. V. Olkhovskiy, V. S. Yunin, and K. V. Kutsenko. "Application of nanoparticles for solar-driven steam generation." Vestnik IGEU, no. 3 (June 30, 2022): 13–23. http://dx.doi.org/10.17588/2072-2672.2022.3.013-023.

Повний текст джерела

Анотація:

Nanoparticles suspended in the base fluid intensify the light-absorbing properties of the medium within wavelength range from 0,2 to 2,5 μm significantly. Also, they can serve as vapor bubble nucleation sites when the base fluid is boiling. Such suspensions are widely used to design the direct absorption solar collectors, in which the nanofluid is possessed both the working fluid and solar energy absorber. However, there is a lack of theoretical models that are capable to evaluate the steam rated capacity of direct absorption solar collector. Thus, the aim of the present paper is an experimental and theoretical study of the boiling of nanofluid exposed to thermal radiation. The experimental study has been carried out on a laboratory-scale unit with a solar radiation simulator. The experimental unit is capable to operate at a continuous steady-state mode with recirculation of condensed fluid. Two types of nanoparticles have been tested: multiwall carbon nanotubes with two sizes of 49 nm and 72 nm and 110 nm iron oxide particles Fe3O4. Distilled and salt water has been used as the base fluid for all types of particles. Mass fraction of particles is varied from 0,5 to 5 %. The reference experiment has been carried out for salt water in a blackened receiver. The theoretical model assumes that boiling is localized in a narrow region adjacent to the irradiated surface. An experimental study of the steam rated capacity for various types of particles has been carried out. An analytical expression has been proposed to estimate the steam rated capacity during the boiling of a nanofluid exposed to thermal radiation. Comparison of the experimental data for the distilled water-based and saltwater-based nanofluids has been carried out. It is found that the addition of sea salt does not affect the steam generation significantly. The maximum difference is 12 %. The highest steam rated capacity is achieved when using carbon nanotubes of mass fraction of 5 %. The steam rated capacity is increased by 23 % compared with the reference experiment. The theoretical model reproduces the experimental data with an average deviation of 7 %. Application of nanoparticles in direct absorption solar collectors allows us to increase the steam rated capacity compared with the boiling of the base liquid in a blackened receiver. The theoretical model is capable to estimate to a high precision the steam rated capacity in case of boiling of suspension exposed to thermal radiation. The results of this study may be of interest during the development of solar power plants with a steam turbine cycle.

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Gorbachuk, N. I., N. A. Poklonski, Ya N. Marochkina, and S. V. Shpakovski. "Controlling of Differential Resistance of p–n-Junctions of Bipolar Transistor in Active Mode by Method of Impedance Spectroscopy." Devices and Methods of Measurements 10, no. 3 (September 9, 2019): 253–62. http://dx.doi.org/10.21122/2220-9506-2019-10-3-253-262.

Повний текст джерела

Анотація:

Controlling of parameters of manufactured transistors and interoperational controlling during their production are necessary conditions for production of competitive products of electronic industry. Traditionally for controlling of bipolar transistors the direct current measurements and registration of capacity-voltage characteristics are used. Carrying out measurements on alternating current in a wide interval of frequencies (20 Hz–30 MHz) will allow to obtain additional information on parameters of bipolar transistors. The purpose of the work is to show the possibilities of the method of impedance spectroscopy for controlling of differential resistance of p–n-junctions of the bipolar p–n–p-transistor in active mode.The KT814G p–n–p-transistor manufactured by JSC “INTEGRAL” was studied by the method of impedance spectroscopy. The values of differential electrical resistance and capacitance for base–emitter and base–collector p–n-junctions are defi at direct currents in base from 0.8 to 46 µA.The results of the work can be applied to elaboration of techniques of fi checking of discrete bipolar semiconductor devices.

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Pshikhopov, Viacheslav, Aleksej Beresnev, and Maksim Beresnev. "ICEs as Part of Mobile Units: Efficiency Improvement." Applied Mechanics and Materials 799-800 (October 2015): 836–41. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.836.

Повний текст джерела

Анотація:

Paper considers problem of increase in key indicators of the internal combustion engines which are used as a part of a wide range of mobile objects, including motor transport surface, underwater and aircrafts. Approach to the solution of a problem of development of the optimum form of an intake system of the engine providing increase in filling of cylinders with fuel and air mix and uniform distribution of air on cylinders is offered. Besides, the requirement of symmetry in time that means a need of air intake from a throttle to the inlet valve of each cylinder for identical amount of time is put. The results of computing tests of the developed form of an intake collector confirming compliance to the developed model to the given requirements are presented. Model sample intended for installation on small-capacity atmospheric 4-cylinder IC engine is made on the base of 3d-model. Need of modification of the software of a control system of the engine for achievement of the maximum return at tests of a model sample is proved. Corresponding changes are described, comparison charts of adjusting parameters are given. Experimental stand for carrying out natural tests was assembled and used to get the external high-speed characteristic of the engine when using a regular intake collector and intake collector of the developed form. The results of tests that clearly demonstrate increase in power and a torque of the engine are given.

Стилі APA, Harvard, Vancouver, ISO та ін.

4

Lorain F. Dela Cruz, Anna, Mark Vincent G. Magnaye, Ervin John V. Manalo, and Nestor C. Camello. "DEVELOPMENT OF GINGER JUICE EXTRACTOR." EPH - International Journal of Science And Engineering 2, no. 3 (September 27, 2016): 13–21. http://dx.doi.org/10.53555/eijse.v2i3.158.

Повний текст джерела

Анотація:

A small scale motorized ginger juice extractor was designed and fabricated, using locally available construction materials. The essential components of the machine include feeding hopper, ginger grinder, screw conveyor, strainer, pulley and transmission belt, electric motor, base and stand. In operation, the ginger will be fed through the grinder to reduce its size. Then, the worm shaft or screw conveyor conveys, crushes, presses and squeezes the grinded ginger to extract the juice. The juice extracted is filtered through the juice sieve into juice collector while the residual waste is discharged through waste outlet. Result showed that for every 1 kg of ginger the average juice yield was 80 ml. Powered by a 0.5 hp electric motor, the machine has a capacity of 1/2 kg/min. With a machine cost of about P45 000, it is affordable for small-scale ginger farmers in the rural communities.

Стилі APA, Harvard, Vancouver, ISO та ін.

5

Motamedi, Shiva, Mohsen Mehdipour Ghazi, Saed Moradi, and Mohammad Reza Talaie. "An Economic Investigation of a Solar-Powered Adsorption Cooling System." ChemEngineering 6, no. 5 (October 13, 2022): 81. http://dx.doi.org/10.3390/chemengineering6050081.

Повний текст джерела

Анотація:

In this paper, an economic investigation is performed to identify the economic feasibility of a solar-powered adsorption cooling system. In the first step, the system is mathematically formulated, and the solar fraction of the system is calculated. After that, the system is economically optimized for a cooling load related to a single-family house using particle swarm optimization. In order to identify the most efficient application of the system, the cost per 1 kW of cooling capacity is calculated over different cooling loads. The results demonstrated that the system under study is more suitable for small-scale applications. In addition, sensitivity to electricity price analysis demonstrates that the main bottleneck of cost-efficient system design is the initial price of the solar collector. Therefore, in the next step, the former sensitivity analysis to electricity price is jointly performed over different initial prices of the solar collector at two different cooling loads. Finally, by considering the cost of CO2 capture and the amount of avoided CO2 by utilizing solar energy, the environmental benefit of the system under investigation is calculated. The results show that the optimum solution is 13% more cost-efficient compared to the base design. In addition, taking the CO2 capture parameters into account, the environmentally friendly case has 21% more annual cost compared to the optimal solution one. However, this extra cost can be justified through CO2 capture cost.

Стилі APA, Harvard, Vancouver, ISO та ін.

6

L'Antigua, Alex, Megan Flannagin, and George J. Nelson. "Capacity Fade and Impedance Evolution in Tin Phosphide Anodes for Sodium-Ion Batteries." ECS Meeting Abstracts MA2022-02, no. 4 (October 9, 2022): 397. http://dx.doi.org/10.1149/ma2022-024397mtgabs.

Повний текст джерела

Анотація:

Sodium-ion batteries (SIBs) offer a potentially more cost effective and environmentally friendly alternative to Lithium-ion batteries for room temperature high density energy storage. To maintain the benefits of SIBs, earth abundance for all the batteries components is paramount. One promising earth abundant anode material for SIBs is tin phosphide (Sn4P3). Tin phosphides are able to retain a high specific capacity for an extended cycle life. Understanding the changes in electrochemistry within a battery as a result of cycling is crucial in the complete understanding of capacity fade mechanisms and subsequent improvement and implementation as an anode material. In this work, the main technique employed to gain this understanding is electrochemical impedance spectroscopy with distribution of relaxation times analysis (EIS-DRT). This mathematical approach to understanding traditional EIS datasets helps distinguish impedance contributions from the following processes: diffusion, counter electrodes, solid electrolyte Interfaces (SEI), and contact resistances. Tin phosphide active material was synthesized by mechanical milling, with material structure confirmed by X-ray diffraction (XRD). Half cells were assembled with sodium counter electrodes and cycled with intermittent EIS assessment. Capacity retention was tracked during cycling to assess electrode operation. EIS-DRT analysis was performed every 5 cycles and after the end of cycling across the anode’s voltage range (0.01-1.5 V vs Na/Na+). After cycling, cyclic voltammetry (CV) and XRD were employed to further understand changes in electrochemical activity and crystal structure associated with the end of cycle life. The evolution of impedance signatures across the initial five cycles exhibits significant shifting within the SEI and counter electrode peak at 1000 Hz. Impedance trends across the voltage range switched, in which lower voltages at higher levels of sodiation exhibit larger impedance contributions to the system. These trends are confirmed by a base understanding of SEI formation and sodiation trends. Relative impedance contributions from the diffusion process increase from pristine to cycled electrodes, with diffusion peaks at becoming the dominant impedance contribution as cycling progresses. Significant changes in DRT trends plateaued after the initial SEI formation over the first five cycles. Abrupt and early failure during cycling of a subset of the cells was marked by a plateau in the working electrode voltage, an increase in contact resistance within EIS-DRT plots and decreased electrochemical activity within CV. Visual post mortem checks correlated well with these findings, with an apparent delamination of the electorate coating from the current collector. Understanding the physical and electrochemical phenomenon within a battery though nondestructive in situ characterization is crucial to simplify work flows in battery testing.

Стилі APA, Harvard, Vancouver, ISO та ін.

7

Artemiev, A. V., and G. V. Mitrofanova. "The use of anionic flocculant in water treatment for flotation of apatite-nepheline ores." Vestnik MGTU 23, no. 2 (June 30, 2020): 150–59. http://dx.doi.org/10.21443/1560-9278-2020-23-2-150-159.

Повний текст джерела

Анотація:

Currently, an urgent problem is the improvement of methods for purification of industrial water from concentrates of suspended particles and water-soluble impurities using polyacrylamide flocculants. By studying the adsorption processes from aqueous solutions of H and OH ions, the acid-base properties of the surface of the solid phase of the most contaminated technological product have been analyzed, i. e. discharge of the thickener of apatite concentrate, the mineral composition of which is 90 % represented by apatite. The influence of reagents present in the processing technology (fatty acid collector, iron sulfate) on the quantitative ratio of acid-base centers on the surface of apatite has been evaluated. It has been shown that the interaction of these reagents with the mineral creates prerequisites for greater efficiency of the anion-type flocculant. In order to determine the conditions under which flocculants of different types are in the maximally ionized state, studies have been carried out to change the viscosity of the polyelectrolyte solution at different pH values. The position of the isionic point for samples of cationic and anionic flocculants in the presence of reagents used in apatite flotation and dehydration of apatite concentrate has been studied as well. Studies on model and real suspensions in recycled water for a wide range of cationic and anionic flocculants have been performed. Kinetic and concentration dependencies of flocculating capacity of analyzed reagents have been determined; the experiments have confirmed the more efficient operation of anionic-type reagents. The search for the most effective reagents will make it possible to provide optimal water values for the content of suspended particles and hardness cations when introducing closed water circulation technology.

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Ткач, Михайло Романович, Борис Георгійович Тимошевський, Аркадій Юрійович Проскурін та Юрій Миколайович Галинкін. "МЕТАЛОГІДРИДНИЙ АКУМУЛЯТОР-КОМПРЕСОР ВОДНЮ З АВТОМАТИЧНОЮ СИСТЕМОЮ УПРАВЛІННЯ ТА КОНТРОЛЮ". Aerospace technic and technology, № 5 (29 серпня 2020): 53–60. http://dx.doi.org/10.32620/aktt.2020.5.07.

Повний текст джерела

Анотація:

A project of metal hydride hydrogen compressor is presented, which can be used as an element of refueling complexes, hydrogen storage and compression systems. The capacity of the developed sample is 40 kg of hydrogen, the mass is 4,8 ton, and the maximum compression pressure is 15 MPa. The base metal hydride material on the basis of which this compressor battery model is developed is LaNi4.5Al0.5. the sorption capacity of hydrogen of which is determined experimentally, and is at least 1.38 % by weight. A feature of the developed compressor battery is the use of air cooling, the presence of an automatic monitoring and control system, I allow a number of operations to be performed in automatic mode, and the use of software, electrical and automatic protection against overpressure. Each accumulator-compressor is made in the form of a steel box in which six blocks (capsules) are placed. The block, respectively, is made in the form of a steel coaxial multilayer cylinder, on the outer side of which there is a heating element and a layer of thermal insulation. In the middle of the cylinder is a sealed capsule filled with metal hydride material. Capsules are interconnected with the collector through a piping system. Also, the piping system is equipped with an inlet valve connecting the volume formed with an external receiver. The battery-compressor is equipped with an external receiver, to which a hydrogen, vacuum, nutrient and consumable outline is connected. Each circuit is equipped with an electromagnetic valve, as well as measuring devices, which makes it possible to carry out automatic control of parameters and automatic control of the device in accordance with the operating mode. A list of equipment is presented, on the basis of which a system of automatic control and monitoring, a block diagram of the main operating modes, an interface of the developed software are developed. Depending on the mode chosen by the operator, the automatic control and monitoring system allows activation of metal hydride materials, purification of contaminants of harmful impurities, sorption and desorption of hydrogen.

Стилі APA, Harvard, Vancouver, ISO та ін.

9

Magonski, Zbigniew, and Barbara Dziurdzia. "New proposal to the electrical representation of a solid oxide fuel cell." Microelectronics International 34, no. 3 (August 7, 2017): 140–48. http://dx.doi.org/10.1108/mi-12-2016-0092.

Повний текст джерела

Анотація:

Purpose The aim of this paper is to find the electrical representation of a solid oxide fuel cell (SOFC) that enables the application of typical exploitation characteristics of fuel cells for estimation of fuel cell parameters (for example, exchange current) and easy analysis of phenomena occurred during the fuel cell operation. Design/methodology/approach Three-layer structure of an SOFC, where a thin semi-conducting layer of electrolyte separates the anode from the cathode, shows a strong similarity to typical semiconductor devices built on the basis of P-N junctions, like diodes or transistors. Current–voltage (I-V) characteristics of a fuel cell can be described by the same mathematical functions as I-V plots of semiconductor devices. On the basis of this similarity and analysis of impedance spectra of a real fuel cell, two electrical representations of the SOFC have been created. Findings The simplified electrical representation of SOFC consists of a voltage source connected in series with a diode, which symbolizes a voltage drop on a cell cathode, and two resistors. This model is based on the similarity of Butler-Volmer to Shockley equation. The advanced representation comprises a voltage source connected in series with a bipolar transistor in close to saturation mode and two resistors. The base-emitter junction of the transistor represents voltage drop on the cell cathode, and the base-collector junction represents voltage drop on the cell anode. This model is based on the similarity of Butler-Volmer equation to Ebers-Moll equation. Originality/value The proposed approach based on the Shockley and Ebers-Moll formulas enables the more accurate estimation of the ion exchange current and other fuel cell parameters than the approach based on the Butler-Volmer and Tafel formulas. The usability of semiconductor models for analysis of SOFC operation was proved. The models were successively applied in a new design of a planar ceramic fuel cell, which features by reduced thermal capacity, short start-up time and limited number of metal components and which has become the basis for the SOFC stack design.

Стилі APA, Harvard, Vancouver, ISO та ін.

10

Tripovic, Diana, Svetlana Pianova, Elspeth M. McLachlan, and James A. Brock. "Slow and incomplete sympathetic reinnervation of rat tail artery restores the amplitude of nerve-evoked contractions provided a perivascular plexus is present." American Journal of Physiology-Heart and Circulatory Physiology 300, no. 2 (February 2011): H541—H554. http://dx.doi.org/10.1152/ajpheart.00834.2010.

Повний текст джерела

Анотація:

We have investigated the recovery of sympathetic control following reinnervation of denervated rat tail arteries by relating the reappearance of noradrenergic terminals to the amplitude of nerve-evoked contractions of isometrically mounted artery segments in vitro. We have also assessed reactivity to vasoconstrictor agonists. Freezing the collector nerves near the base of the tail in adult rats denervated the artery from ∼40 mm along the tail. Restoration of the perivascular plexus declined along the length of the tail, remaining incomplete for >6 mo. After 4 mo, nerve-evoked contractions were prolonged but of comparable amplitude to control at ∼60 mm along the tail; they were smaller at ∼110 mm. At ∼60 mm, facilitation of contractions to short trains of stimuli by the norepinephrine transporter blocker, desmethylimipramine, and by the α2-adrenoceptor antagonist, idazoxan, was reduced in reinnervated arteries. Blockade of nerve-evoked contractions by the α1-adrenoceptor antagonist, prazosin, was less and by idazoxan greater than control after 8 wk but similar to control after 16 wk. Sensitivity of reinnervated arteries to the α1-adrenoceptor agonist, phenylephrine, was raised in the absence but not in the presence of desmethylimipramine. Sensitivity to the α2-adrenoceptor agonist, clonidine, was maintained in 16-wk reinnervated arteries when it had declined in controls. Thus regenerating sympathetic axons have a limited capacity to reinnervate the rat tail artery, but nerve-evoked contractions match control once a relatively sparse perivascular plexus is reestablished. Functional recovery involves prolongation of contractions and deficits in both clearance of released norepinephrine and autoinhibition of norepinephrine release.

Стилі APA, Harvard, Vancouver, ISO та ін.

11

Kovalenko, Vadym, and Valerii Kotok. "Comparative investigation of different types of nickel foam samples for application in supercapacitors and other electrochemical devices." Eastern-European Journal of Enterprise Technologies 3, no. 12 (111) (June 30, 2021): 32–38. http://dx.doi.org/10.15587/1729-4061.2021.234251.

Повний текст джерела

Анотація:

Nickel foam is widely used as a current lead/current collector and the basis of nickel hydroxide electrodes for various electrochemical devices – batteries, hybrid supercapacitors, devices for electrocatalytic oxidation of organic substances. The characteristics of commercial samples of nickel foam produced by Novomet-Perm (Russian Federation) obtained by electroless and then electrochemical nickel plating and Linyi Gelon LIB Co Ltd (China) obtained by electroless nickel plating were studied. The nature of passivity was determined by forming model samples of electrochemical and electroless nickel on a steel base. For the passive sample, activation was carried out by applying a layer of electrochemical nickel from an impact nickel plating solution. Activated, non-activated samples of nickel foam, as well as model samples, were studied by the methods of cyclic voltammetry and galvanostatic charge-discharge cycling in the supercapacitor mode. Comparative analysis of Chinese-made and Russian-made nickel foam samples showed significant passivity of the former – in cyclic voltammetry, the activity was 4.8 times lower, with galvanostatic charge-discharge cycling – 2.59 times lower. It was suggested that high passivity was determined by the fact that the sample consisted of Ni-P or Ni-B alloy. This assumption was proved by the method of natural simulation. The electrochemical activity of electroless nickel was 1.25 times lower than that of electrochemical nickel (according to cyclic voltammetry data) and 1.58 times lower (according to galvanostatic cycling data). For the first time, Chinese-made nickel foam (electroless nickel) was activated by applying a layer of electrochemical nickel from an impact nickel electrolyte. The high activation efficiency was shown as follows – on the cyclic curve, the specific current of the anodic peak increased 8.71 times, and with galvanostatic cycling, the increase in specific capacity was from 1.73 times (at i=120 mA/cm2) to 4.84 times (at i=20 mA/cm2)

Стилі APA, Harvard, Vancouver, ISO та ін.

12

Eron’ko, S. P., E. A. Ponamareva, and E. S. Tsykhmistro. "Development of vibration system for decreasing of intensity of steel ladle outlet channel tightening." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 77, no. 2 (February 25, 2021): 165–74. http://dx.doi.org/10.32339/0135-5910-2021-2-165-174.

Повний текст джерела

Анотація:

The problem of tightening of outlet channel of steel ladle still remains relevant at present. A review of scientific and technical studies, aimed at elaboration of methods to keep the channel flow section constant presented. An analysis of deposition forming mechanisms on walls of outlet channel of steel ladle was done. To prevent their formation it was proposed to apply a vibration impact on the ladle shutter. Using simulation studies and specially elaborated methodology, the degree of influence and frequency of amplitude oscillations, acting along the ladle channel, on increasing speed of layer thickness formation on its walls and number of tearing off hard particles was established. To evaluate intensity of elastic waves absorption by the refractories of ladle shutter during vibration impact on it, a natural experiment was done. As a result of the experiment an initial information was obtained for determining parameters of oscillation process to guarantee effective functioning of the proposed casting facility. A necessity was established to account tenfold decrease of vibration acceleration during propagation of elastic wave along the casting channel from the lower end of collector nuzzle to the upper end of the ladle casting nozzle. Results of the complex studies became base of technical solution at elaboration of design of the ladle shutter. The elaborated shutter is equipped by a system of exciting vertically-directed oscillations, promoting decreasing intensity of hard particles sticking on the walls of the outlet channel. The design of the perfected ladle shutter and general view of its test model shown, which is equipped with the vertically-directed oscillations exciting system. Depending on capacity of the steel ladles, which can be from 100 to 300 t, their shutters can be equipped with one or several pneumatic plunger vibrators. Each of the plunger having the mass of 0.8 kg, can develop an impact force up to 300 N when supplying into its working cavity compressed air of 0.2 MPa pressure at flow rate 150 l/min. Industrial tests of the modernized shutter in a foundry shop of Yasinovatsky machine-building plant were done.

Стилі APA, Harvard, Vancouver, ISO та ін.

13

Vozniak, Oleksandr, and Andrii Shtuts. "CALCULATION OF NON-STANDARD W-PARAMETERS OF FOUR-POLE ON BIPOLAR TRANSISTORS." ENGINEERING, ENERGY, TRANSPORT AIC, no. 2(109) (August 27, 2020): 122–28. http://dx.doi.org/10.37128/2520-6168-2020-2-13.

Повний текст джерела

Анотація:

Improving the performance of microwave devices can be achieved both through the use of a fundamentally new element base, and through the use of new circuit designs. In this respect, the direction of use of the reactive properties of transistors as well as transistor structures with negative resistance for the construction of information-measuring systems and operating and computing devices of the microwave range is promising in this respect. In order to confirm the proposed methods, it is necessary to compare the results of the experimental studies using the proposed methods and means of measuring the W-parameters of real potentially unstable four-poles. As such four-poles it is proposed to use bipolar and transistors with a wide range of frequencies of potential instability. The paper develops mathematical models of W-parameters of such structures and evaluates their parameters in the frequency range. The active four-pole is a transistor model. Its W parameters can be determined either experimentally - for specific conditions or calculated - by using a physical transistor replacement circuit. In most cases, the calculation path is more acceptable because it allows to obtain analytical expressions for the four-pole, it is important in the analysis of the influence of various factors on the characteristics of the scheme under study. The inertial properties of the transistor are already manifested at relatively low frequencies and must be taken into account in practically the entire operating range of the transistor. The theoretical model holds up to frequencies f  2fт (where ft is the limit frequency) [1,3]. At higher frequencies, it is necessary to consider the parasitic reactive parameters of real transistors, first of all, the inductance of the terminals. A physically T-equivalent equivalent transistor replacement scheme was proposed by Pritchard in a simplified version [4]. It has several varieties, differing in the configuration of the circuit consisting of the resistance of the base material and the capacity of the collector junction. If we carefully consider and compare the T and U-shaped circuits of the transistor substitution, it can be noticed that they differ only in the configuration of their inne r part - the theoretical model. At high frequencies P and T, such circuits are not exact mutual equivalents. This is due to the approximation used in the transition from one circuit to another. However, the frequency characteristics of the circuits are very close. Each of them models the processes in the transistor with approximately the same accuracy, and in this sense they are equivalent.

Стилі APA, Harvard, Vancouver, ISO та ін.

14

Latif, Saira, Torbjörn Lindbäck, Magnus Karlberg, and Johanna Wallsten. "Bale Collection Path Planning Using an Autonomous Vehicle with Neighborhood Collection Capabilities." Agriculture 12, no. 12 (November 22, 2022): 1977. http://dx.doi.org/10.3390/agriculture12121977.

Повний текст джерела

Анотація:

This research was mainly focused on the evaluation of path planning approaches as a prerequisite for the automation of bale collection operations. A comparison between a traditional bale collection path planning approach using traditional vehicles such as tractors, and loaders with an optimized path planning approach using a new autonomous articulated concept vehicle with neighborhood reach capabilities (AVN) was carried out. Furthermore, the effects of carrying capacity on reduction in the working distance of the bale collection operation was also studied. It was concluded that the optimized path planning approach using AVN with increased carrying capacity significantly reduced the working distance for the bale collection operation and can thus improve agricultural sustainability, particularly within forage handling.

Стилі APA, Harvard, Vancouver, ISO та ін.

15

Zhang, XiWen. "Research on Capacity of Network of Different Cells." Highlights in Science, Engineering and Technology 27 (December 27, 2022): 580–83. http://dx.doi.org/10.54097/hset.v27i.3819.

Повний текст джерела

Анотація:

For the indicator system that affects user perception, voice services such as user traffic, average call duration, call drop rate, congestion rate, paging failure rate, call start failure rate, etc; For data services, such as user connection success rate, Internet access rate, etc. The following figure shows the system architecture of the web-based user awareness assessment system. Through the network infrastructure and signaling detection system, the original signaling monitoring data, policy data of each call, analysis data collection, core network traffic statistics and alarm information are collected on a platform, and then through the preprocessing of data, a report based on the user awareness evaluation system is generated to identify problems before users, solve problems in time and provide work efficiency, Provide user perceived satisfaction. The purpose of the research is to find out the influence of the add or decrease of the base station to the capacity of the whole network in order to deal with it when we build or rebuild some base stations in the network. The research takes use of the Gaussian white noise channel as the model of the channel. And every single cell is divided into two parts to calculate the interference and the capacity of the channel. The standard to divide the cells is the base station. As the number of cells increases, the capacity of the whole network increases.

Стилі APA, Harvard, Vancouver, ISO та ін.

16

Rong-Tai Chen. "Capacitor-Based Multisource of Flyback-Type Power Collector." IEEE Transactions on Industrial Electronics 55, no. 8 (August 2008): 3115–23. http://dx.doi.org/10.1109/tie.2008.921247.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

17

Yu, Shang-Pang, Tun-Ping Teng, Chia-Cing Huang, Hsiang-Kai Hsieh, and Yi-Jia Wei. "Performance Evaluation of Carbon-Based Nanofluids for Direct Absorption Solar Collector." Energies 16, no. 3 (January 20, 2023): 1157. http://dx.doi.org/10.3390/en16031157.

Повний текст джерела

Анотація:

In this study, carbon-based nanofluids (CBNFs) were prepared using a revised vortex trap method and applied in the direct absorption solar collector (DASC) to evaluate the feasibility of CBNFs in DASC. The thermal storage performance of water and different concentrations of CBNFs (0.01, 0.025 and 0.05 wt%) was assessed with a 1000 W halogen lamp as a simulated light source under different volumetric flow rates (1.5, 3.0, and 4.5 L per minute [LPM]) at a constant thermal storage load (2.4 kg of water) and ambient temperature of 26 °C. The thermal storage capacity, system efficiency factor (SEF), and heating rate of the CBNFs as the working fluid were higher than those of water in most cases. The thermal storage capacity and SEF of 0.05 wt% CBNF at a volumetric flow rate of 3.0 LPM were 10.36% and 9.36% higher than that of water, respectively. The relevant experimental results demonstrate the great potential of CBNFs in DASC.

Стилі APA, Harvard, Vancouver, ISO та ін.

18

Shishkin, Andrei, Viktor Mironov, Vjaceslavs Lapkovskis, Juris Treijs, and Aleksandr Korjakins. "Ferromagnetic Sorbents for Collection and Utilization of Oil Products." Key Engineering Materials 604 (March 2014): 122–25. http://dx.doi.org/10.4028/www.scientific.net/kem.604.122.

Повний текст джерела

Анотація:

This Current paper reports the research conducted at Riga Technical University and Rezekne Higher Education Institution on the development of sorbent material, which is made of closed hollow microspheres possesses ferromagnetic properties, with a large specific surface. A review and comparison of existing sorbents for oil products collection are presented. The manufacturing process of proposed sorbent are described. The structure and morphology of obtained composite sorbent are discussed. It was found that proposed sorbent allows an efficient and safe way for surface water cleaning contaminated by spilled oil products. In particular, it shows a storing effect on a thin oil film (1-2 mm). Adsorption capacity to motor oil is investigated and compared with other magnetic sorbents on metal powders base. Newly proposed sorbent demonstrates a significantly higher adsorption capacity comparing to iron powders. Sorbent saturated by spilled oil can be evacuated by means of magnetic (or electromagnetic) captures.

Стилі APA, Harvard, Vancouver, ISO та ін.

19

Domitrović, Josipa, and Tatjana Rukavina. "Application of GPR and FWD in Assessing Pavement Bearing Capacity." Romanian Journal of Transport Infrastructure 2, no. 2 (December 1, 2013): 11–21. http://dx.doi.org/10.1515/rjti-2015-0015.

Повний текст джерела

Анотація:

Abstract The process of pavement maintenance and rehabilitation starts by collecting the data which will form the base for evaluation of pavement functional and structural condition. Collection of data can be performed by destructive and non-destructive testing. Usually preferred are the non-destructive methods, that do not damage the pavement, and the process of pavement evaluation is objective and repeatable. Non-destructive testing methods are becoming more and more popular, especially for assessing the structural condition of the pavement. Non-destructive testing by a Falling Weight Deflectometer (FWD) and the analysis of so collected data by the process of backcalculations is today the usual tool for assessing pavement bearing capacity. One of the basic input parameters for analysis of the data collected by FWD is pavement layers thickness. The practice in Croatia is to determine pavement layers thickness by coring. This destructive method affects pavement integrity, so the number of such tests should be kept to the minimum. By coring the accurate thickness of all pavement layers is obtained on specific point locations. Thus, numerous deviations in layer thickness remain unnoticed, and in the end, use of such data for the process of backcalculations does not provide ac urate values of layer moduli. Coring can be replaced with non-destructive method of testing by Ground Penetrating Radar (GPR), which provides continuous information on thickness of all pavement layers. The paper shows the method for assessing the bearing capacity of the pavement based on the data collected by FWD, GPR and coring. The calculation for layer moduli was performed by the ELMOD software, separately for the layers thickness data obtained by coring, and separately for the thickness obtained by GPR tests. Analysis and comparison of the results of calculated elasticity moduli obtained by using various methods for collecting layer thickness data were performed in the paper.

Стилі APA, Harvard, Vancouver, ISO та ін.

20

Shin, Dongyeeb, Yongkwon Song, Donghyeon Nam, Jun Hyuk Moon, Seung Woo Lee, and Jinhan Cho. "High-capacity sulfur copolymer cathode with metallic fibril-based current collector and conductive capping layer." Journal of Materials Chemistry A 9, no. 4 (2021): 2334–44. http://dx.doi.org/10.1039/d0ta09516h.

Повний текст джерела

Анотація:

We report a sulfur copolymer cathode with high areal/specific capacity, rate capability, and cycling stability using carbonization-induced Ni electroplating and interfacial interaction-controlled conductive capping layer.

Стилі APA, Harvard, Vancouver, ISO та ін.

21

Farman Majeed Salam and Assist prof Dr Hirsh Muhammad Majid. "Evaluation of Capacity and Level of Service for Heterogeneous Traffic of Urban Multi-Lane Highways." CONSTRUCTION 2, no. 2 (October 11, 2022): 31–38. http://dx.doi.org/10.15282/construction.v2i2.8609.

Повний текст джерела

Анотація:

This study aimed to evaluate the capacity and level of service of urban multi-lane highway where the traffic composition is not uniform. Capacity is the greatest sustainable hourly flow rate, and the level of service is a performance measure used for assessing the quality of road service. In this study the last methodology of HCM2016 was used. Data collection was done on four different segments chosen to be suitable with the highway capacity manual conditions. Traffic volumes have been collected using two different techniques; moving car method and the stationary method. All the required geometric parameters have also been measured. The peak hour factor has been found for all the segments. The spot speed was used to check the speed limit (mounted speed) and to find free flow speed. At the end, the level of service and capacity for the segments were found. The level of services of most of the segments is between C and D. The base capacity of the segments is between 1850 to 1900 pc/h/ln.

Стилі APA, Harvard, Vancouver, ISO та ін.

22

van Brummelen, S. P. J., N. M. van Dijk, K. van den Hurk, and W. L. de Kort. "Waiting time-based staff capacity and shift planning at blood collection sites." Health Systems 7, no. 2 (January 18, 2018): 89–99. http://dx.doi.org/10.1057/s41306-017-0032-9.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

23

Lizhu, Ma. "Study on the reliability of the carrying capacity of static pressure pipe piles in Shenyang." E3S Web of Conferences 136 (2019): 04070. http://dx.doi.org/10.1051/e3sconf/201913604070.

Повний текст джерела

Анотація:

On the basis of the previous work, combined with the test piles collected from Shenyang area, this paper makes a detailed study of the current standard single safety factor design pile base method to the probability limit state design pile base method. The main work is statistical analysis, calculation of reliability index, analysis of the main factors affecting the reliability index of static pressure pipe pile and the analysis of its sub-coefficient coefficients, the reliability of its carrying capacity analysis has made a useful exploration.

Стилі APA, Harvard, Vancouver, ISO та ін.

24

Rehnlund, David, Fredrik Lindgren, Solveig Böhme, Tim Nordh, Yiming Zou, Jean Pettersson, Ulf Bexell, Mats Boman, Kristina Edström, and Leif Nyholm. "Lithium trapping in alloy forming electrodes and current collectors for lithium based batteries." Energy & Environmental Science 10, no. 6 (2017): 1350–57. http://dx.doi.org/10.1039/c7ee00244k.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

25

Arifin, Ajib Setyo, and Tomoaki Ohtsuki. "Capacity of Data Collection in Wireless Sensor Networks Based on Mutual Information and MMSE Estimation." ISRN Sensor Networks 2014 (February 17, 2014): 1–9. http://dx.doi.org/10.1155/2014/389451.

Повний текст джерела

Анотація:

We investigate the properties of data collection in wireless sensor networks, in terms of both capacity and power allocation strategy. We consider a scenario in which a number of sensors observe a target being estimated at fusion center (FC) using minimum mean-square error (MMSE) estimator. Based on the relationship between mutual information and MMSE (I-MMSE), the capacity of data collection in coherent and orthogonal multiple access channel (MAC) models is derived. Considering power constraint, the capacity is derived under two scenarios: equal power allocation and optimal power allocation of both models. We provide the upper bound of capacity as a benchmark. In particular, we show that the capacity of data collection scales as Θ((1/2)log(1+L)) when the number of sensors L grows to infinity. We show through simulation results that for both coherent and orthogonal MAC models, the capacity of the optimal power is larger than that of the equal power. We also show that the capacity of coherent MAC is larger than that of orthogonal MAC, particularly when the number of sensors L is large and the total power P is fixed.

Стилі APA, Harvard, Vancouver, ISO та ін.

26

Shevchenko, G. A., V. G. Shevchenko, V. A. Baranov, and V. N. Spassky. "The enrichment technology of slag from metallurgical processing of copper ore concentrate." Journal of Geology, Geography and Geoecology 28, no. 3 (October 8, 2019): 537–45. http://dx.doi.org/10.15421/111950.

Повний текст джерела

Анотація:

The purpose of this research is the development of a technology for the enrichment of slag from metallurgical processing of copper ore concentrate based on the results of spectral, chemical, sieve and petrographic analysis. The results of spectral analysis indicate the copper content in all three samples of mineral raw materials at more than 1 %. The results of chemical analysis indicated a high copper content in the samples from 13.4 to 17.1%, as well as a high iron content from 9 to 18%. Analysis of the results of the sieve analysis showed that the largest amount of copper is contained in the size classes 0.063–0.05 mm at from 18.6 to 24.1 % and 0.04 mm at from 15.6 to 38 %. In accordance with the petrographic studies, the size of copper grains varies from 0.1–0.3 to 1–5 mm. The most common sizes of copper grains in the studied samples are 0.2-0.3 and 1-2 mm. Based on the results of spectral, chemical, sieve and petrographic analysis, a technology for the enrichment of copper-containing slags has been developed. Gravity wet enrichment technology with a capacity of 5 t/h with Cu recovery in the range of 80–95 % suggests the grinding of raw materials with a constant water supply up to 40 m3/h from the sludge collector. The heavy fractions are fed to a magnetic separator and then to a classifier for the extraction of magnetic concentrate and slag, which after the separation of the fraction of 0.08-0.4 mm with the MVG screen can later be used as a raw material for the building industry. The light fractions after the concentration tables are fed to the classifier, on which the copper concentrate is released. The average density fractions are returned to the closed cycle for further grinding in a ball mill. However, such a wet enrichment scheme requires a continuous water supply and the sludge collector’s presence, which cannot always be ensured. Therefore, the technology of slag dry enrichment with a particle size of 0–100 mm has also been developed. The central apparatus in the proposed enrichment technologies is the MVG vibrating screen, which is designed to separate bulk materials by particle size from 20 microns to several millimeters. Polyfrequency oscillations in the frequency range from several Hz to kHz are implemented on the screen, eliminating blockage of the sieve cells, destruction of the formed aggregates of stuck particles, ensuring their intensive movement in the layer and efficient passage of particles reaching the sieve surface through the cells. This type of vibration makes it possible to achieve much greater efficiency of separation and dehydration of materials than in traditional screens and to ensure continuous self-cleaning of the mesh, which contributes to the process of separation and dehydration. Due to the lack of tension, high durability of the working surface is ensured. Due to the transfer of minimum loads on the base, the screen is installed without arranging special foundations, including on the floors of buildings and structures. A standard- sized row of screens was developed with a screening surface area from 1 to 4 m2 and a different number of tiers.

Стилі APA, Harvard, Vancouver, ISO та ін.

27

Nyamaa, Oyunbayar, Duck-Hyeon Seo, Jun-Seok Lee, Hyo-Min Jeong, Sun-Chul Huh, Jeong-Hyeon Yang, Erdenechimeg Dolgor, and Jung-Pil Noh. "High Electrochemical Performance Silicon Thin-Film Free-Standing Electrodes Based on Buckypaper for Flexible Lithium-Ion Batteries." Materials 14, no. 8 (April 19, 2021): 2053. http://dx.doi.org/10.3390/ma14082053.

Повний текст джерела

Анотація:

Recently, applications for lithium-ion batteries (LIBs) have expanded to include electric vehicles and electric energy storage systems, extending beyond power sources for portable electronic devices. The power sources of these flexible electronic devices require the creation of thin, light, and flexible power supply devices such as flexile electrolytes/insulators, electrode materials, current collectors, and batteries that play an important role in packaging. Demand will require the progress of modern electrode materials with high capacity, rate capability, cycle stability, electrical conductivity, and mechanical flexibility for the time to come. The integration of high electrical conductivity and flexible buckypaper (oxidized Multi-walled carbon nanotubes (MWCNTs) film) and high theoretical capacity silicon materials are effective for obtaining superior high-energy-density and flexible electrode materials. Therefore, this study focuses on improving the high-capacity, capability-cycling stability of the thin-film Si buckypaper free-standing electrodes for lightweight and flexible energy-supply devices. First, buckypaper (oxidized MWCNTs) was prepared by assembling a free stand-alone electrode, and electrical conductivity tests confirmed that the buckypaper has sufficient electrical conductivity (10−4(S m−1) in LIBs) to operate simultaneously with a current collector. Subsequently, silicon was deposited on the buckypaper via magnetron sputtering. Next, the thin-film Si buckypaper freestanding electrodes were heat-treated at 600 °C in a vacuum, which improved their electrochemical performance significantly. Electrochemical results demonstrated that the electrode capacity can be increased by 27/26 and 95/93 μAh in unheated and heated buckypaper current collectors, respectively. The measured discharge/charge capacities of the USi_HBP electrode were 108/106 μAh after 100 cycles, corresponding to a Coulombic efficiency of 98.1%, whereas the HSi_HBP electrode indicated a discharge/charge capacity of 193/192 μAh at the 100th cycle, corresponding to a capacity retention of 99.5%. In particular, the HSi_HBP electrode can decrease the capacity by less than 1.5% compared with the value of the first cycle after 100 cycles, demonstrating excellent electrochemical stability.

Стилі APA, Harvard, Vancouver, ISO та ін.

28

Rippy, Janet F. M., Paul V. Nelson, and Ted Bilderback. "Cation Exchange Capacity and Base Saturation of 64 Peat Mosses." HortScience 40, no. 4 (July 2005): 1124D—1124. http://dx.doi.org/10.21273/hortsci.40.4.1124d.

Повний текст джерела

Анотація:

Problems of inconsistent initial pH in peat moss-based substrates that are created using standard formulas for limestone additions, and pH drift from the target in those substrates may be due to variations in the CEC and BS of peat moss. This study was conducted to determine whether such variation exists. Sixty-four peat moss samples were obtained from several bogs across Alberta, Canada. Adsorbed cations on each peat moss sample were displaced with hydrochloric acid (HCl), and flushed out with three deionized water washes. The displacing/flushing solution was collected and later analyzed for concentration of bases (Ca, Mg, K, and Na) using atomic absorption spectrometry. After cations were removed, the peat moss exchange sites were saturated with barium acetate [Ba(OAc)2] to displace the H+, which were then collected by a second flushing with deionized water. This second displacing/flushing solution was titrated with measured amounts of NaOH to a phenolphthalein end point. Base saturation and CEC were calculated. There were significant variations in CEC (ranging from 108.12 to 162.25 cmol·kg-1) and BS (ranging from 13.52% to 63.97% of CEC) among the peat moss samples. Ca accounted for 78.08% of the BS. For a given peat moss, the higher the BS, the lower the neutralization requirement to achieve a target pH. Also, high CEC peat mosses may have greater buffering capacity than those with low CEC, which may result in less pH drift.

Стилі APA, Harvard, Vancouver, ISO та ін.

29

Wahyutama, Aria Bisma, and Mintae Hwang. "YOLO-Based Object Detection for Separate Collection of Recyclables and Capacity Monitoring of Trash Bins." Electronics 11, no. 9 (April 21, 2022): 1323. http://dx.doi.org/10.3390/electronics11091323.

Повний текст джерела

Анотація:

This study describes the development of a smart trash bin that separates and collects recyclables using a webcam and You Only Look Once (YOLO) real-time object detection in Raspberry Pi, to detect and classify these recyclables into their correct categories. The classification result rotates the trash bin lid and reveals the correct trash bin compartment for the user to throw away trash. The performance of the YOLO model was evaluated to measure its accuracy, which was 91% under an optimal computing environment and 75% when deployed in Raspberry Pi. Several Internet of Things hardware, such as ultrasonic sensors for measuring trash bin capacity and GPS for locating trash bin coordinates, are implemented to provide capacity monitoring controlled by Arduino Uno. The capacity and GPS information are uploaded to Firebase Database via theESP8266 Wi-Fi module. To deliver the capacity monitoring feature, the uploaded trash bin capacity information is displayed on the mobile application in the form of a bar level developed in the MIT App Inventor for the user to quickly take action if required. The system proposed in this study is intended to be implemented in a rural area, where it can potentially solve the recyclable waste separation problem.

Стилі APA, Harvard, Vancouver, ISO та ін.

30

Mohan, Mithun, and Satish Chandra. "Capacity estimation of unsignalized intersections under heterogeneous traffic conditions." Canadian Journal of Civil Engineering 47, no. 6 (June 2020): 651–62. http://dx.doi.org/10.1139/cjce-2018-0796.

Повний текст джерела

Анотація:

Capacity of movements at unsignalized intersections are usually estimated based on gap acceptance theory and accuracy of such estimation largely depends on the extent to which its inherent assumptions are satisfied. However, owing to the typical traffic operations at intersections in developing countries, many of these assumptions remain unsatisfied and hence, estimating capacity as per the procedure laid down in the capacity manuals of developed countries will prove inaccurate. The present research focuses on developing the entire procedure for estimating the capacities of movements at unsignalized intersections dealing with heterogeneous traffic. This study is based on data collected from eight different unsignalized intersections located in various parts of India and by using Harders’ capacity model as base, the procedure to estimate the parameters of this model is revised to suit the traffic operations in developing countries and further modifies the Harders’ model using the movement capacities measured in the field.

Стилі APA, Harvard, Vancouver, ISO та ін.

31

Chen, Shang, Fang Tang, Ting He, Huanhuan Zhang, Shanshan Deng, Yukang Li, Xianwen Wu, Qiaobao Zhang, Yanhong Xiang, and Wenbin Yan. "Electrochemical Performance of Hybrid Cationic Aqueous-Based Rechargeable Battery with Different Current Collectors and Electrolytes." International Journal of Photoenergy 2019 (December 23, 2019): 1–7. http://dx.doi.org/10.1155/2019/3792942.

Повний текст джерела

Анотація:

Different zinc foils as anode current collectors by electrowinning in various electrolytes with additives were prepared, which were evaluated through X-ray diffraction (XRD), scanning electron microscopy (SEM), float charge, and Tafel curve tests. The effect of different cathode current collectors, electrolytes, and the as-prepared zinc foils as the anode on the coulombic efficiency and the cycling performance of aqueous batteries were investigated. The results indicate that the initial coulombic efficiency and discharge capacity of the battery with 1 mol/L ZnSO4 and 2 mol/L Li2SO4 are 94.31% and 105.7 mAh/g using graphite as the current collector, which are much higher than 68.20% and 71.0 mAh/g using conductive polyethylene, respectively, attributed to the smaller polarization and electrochemical transfer impedance (Rct) of the former. However, the capacity retention of the latter is much higher than that of the former, especially using the high-concentration-lithium-based hybrid electrolyte, of which it is up to 74.63% even after 500 cycles. Moreover, the cycling performance of a battery with as-prepared zinc foil adding thiourea and gelatin into electrolyte during electrowinning is much better than that without additives, which is due to the smaller corrosion rate and side reaction.

Стилі APA, Harvard, Vancouver, ISO та ін.

32

Yu, Zhang, Liu Xugang, Geng Xue, and Li Dan. "Iot Forest Environmental Factors Collection Platform Based On Zigbee." Cybernetics and Information Technologies 14, no. 5 (December 1, 2014): 51–62. http://dx.doi.org/10.2478/cait-2014-0043.

Повний текст джерела

Анотація:

Abstract Nowadays the development of Internet of Things (IoT) technology has witnessed great changes in the world. As it has often been mentioned, IoT Environment Monitoring Technologies and IOT Smart Home Technologies have been gradually accepted by people and have good prospects for development. Now we can research a networking based intelligent platform to monitor our forest environmental factors in time with the new IoT technology based on ZIGBEE protocol. ZIGBEE based networking technologies has the advantages of low power dissipation, low data rate and high-capacity transportation, which makes it more suitable for the design of the node of forest environmental factors collection platform. So, we are going to discuss a kind of IoT forest environment factors collection platform based on ZIGBEE protocol.

Стилі APA, Harvard, Vancouver, ISO та ін.

33

Gbegi, D. O., J. F. Adebisi, and Bodunde Tosin. "Managing Economic Recession through Effective Tax Collection: The Nigerian Experience." International Research in Economics and Finance 1, no. 1 (December 10, 2017): 71. http://dx.doi.org/10.20849/iref.v1i1.274.

Повний текст джерела

Анотація:

Economic recession has eaten deep into the economy to the extent that taxes generated cannot serve as a pivot upon which the economy could strive. This study examines how economic recession can be managed through effective tax collection. Secondary data was obtained from the CBN statistical bulletin between periods of 2003 to 2016. Regression technique was used in testing the data collected with the aid of E-VIEWS. The study revealed that taxes do not have significant positive effect on the nation’s Gross Domestic Product, Government Spending, Capacity Utilization and Money Supply. Thus, it implies that taxes in Nigeria are rather unfortunately underexploited, which is an indication of poor tax collection system. This study therefore concludes that, tax should be considered as the urgent and needful panacea to rescue the current economic illness that Nigeria is currently facing. This should be done by ensuring that relevant tax authorities have good tax collection system like effective tax data base, effective E-tax registration, effective E-tax payment and all tax payers should have tax identification number.

Стилі APA, Harvard, Vancouver, ISO та ін.

34

Shimizu, Masahiro, Tomonari Ohnuki, Takayuki Ogasawara, Taketoshi Banno, and Susumu Arai. "Electrodeposited Cu/MWCNT composite-film: a potential current collector of silicon-based negative-electrodes for Li-Ion batteries." RSC Advances 9, no. 38 (2019): 21939–45. http://dx.doi.org/10.1039/c9ra03000j.

Повний текст джерела

Анотація:

To develop the potential high theoretical capacity of Si as a negative electrode material for Li-ion batteries, a new type of composite current collector in which carbon nanotubes (CNTs) are immobilized on a Cu surface was developed using an electroplating technique.

Стилі APA, Harvard, Vancouver, ISO та ін.

35

Lu, Jia, Gang Ren, and Linghui Xu. "Analysis of Subway Station Distribution Capacity Based on Automatic Fare Collection Data of Nanjing Metro." Journal of Transportation Engineering, Part A: Systems 146, no. 2 (February 2020): 04019067. http://dx.doi.org/10.1061/jtepbs.0000304.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

36

Baguet, Audrey, Inge Everaert, Benito Yard, Verena Peters, Johannes Zschocke, Ana Zutinic, Emile De Heer, Tomasz Podgórski, Katarzyna Domaszewska, and Wim Derave. "Does low serum carnosinase activity favor high-intensity exercise capacity?" Journal of Applied Physiology 116, no. 5 (March 1, 2014): 553–59. http://dx.doi.org/10.1152/japplphysiol.01218.2013.

Повний текст джерела

Анотація:

Given the ergogenic properties of β-alanyl-L-histidine (carnosine) in skeletal muscle, it can be hypothesized that elevated levels of circulating carnosine could equally be advantageous for high-intensity exercises. Serum carnosinase (CN1), the enzyme hydrolyzing the dipeptide, is highly active in the human circulation. Consequently, dietary intake of carnosine usually results in rapid degradation upon absorption, yet this is less pronounced in subjects with low CN1 activity. Therefore, acute carnosine supplementation before high-intensity exercise could be ergogenic in these subjects. In a cross-sectional study, we determined plasma CN1 activity and content in 235 subjects, including 154 untrained controls and 45 explosive and 36 middle- to long-distance elite athletes. In a subsequent double-blind, placebo-controlled, crossover study, 12 men performed a cycling capacity test at 110% maximal power output (CCT 110%) following acute carnosine (20 mg/kg body wt) or placebo supplementation. Blood samples were collected to measure CN1 content, carnosine, and acid-base balance. Both male and female explosive athletes had significantly lower CN1 activity (14% and 21% lower, respectively) and content (30% and 33% lower, respectively) than controls. Acute carnosine supplementation resulted only in three subjects in carnosinemia. The CCT 110% performance was not improved after carnosine supplementation, even when accounting for low/high CN1 content. No differences were found in acid-base balance, except for elevated resting bicarbonate following carnosine supplementation and in low CN1 subjects. In conclusion, explosive athletes have lower serum CN1 activity and content compared with untrained controls, possibly resulting from genetic selection. Acute carnosine supplementation does not improve high-intensity performance.

Стилі APA, Harvard, Vancouver, ISO та ін.

37

KIM, Jong H., Kyoung H. SHIN, Chang S. JIN, Dong K. KIM, Yong G. KIM, Jong H. PARK, Yong S. LEE, Yong S. JOO, and Kyung H. LEE. "The Effect of Nickel Foam Current Collector in Carbon Electrode Based Electric Double Layer Capacitor." Electrochemistry 69, no. 11 (November 5, 2001): 853–57. http://dx.doi.org/10.5796/electrochemistry.69.853.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

38

Putri, Indra A. S. L. P., and Fajri Ansari. "Managing Nature-Based Tourism in Protected Karst Area Based on Tourism Carrying Capacity Analysis." Journal of Landscape Ecology 14, no. 2 (September 1, 2021): 46–64. http://dx.doi.org/10.2478/jlecol-2021-0012.

Повний текст джерела

Анотація:

Abstract Nature-based tourism relies on the beauty of nature to maintain sustainability and attraction. However, karst environment is vulnerable to disturbance due to tourism activity. This study, therefore, aims to analyze the social, ecological, physical, real, and effective carrying capacity of Pattunuang Assue Nature Tourism Object, Bantimurung Bulusaraung National Park. Data were collected through field measurement, observation, and interviews. Data of visitors’ favorite spot and its size were measured through observation and field measurement. Visitors’ perceptions related to the destination, including their duration activities were collected through interviews. It was further collected by observing the various spots of activity, and measuring the area of restrictive factors such as physical (number of rainy days), biotic (vegetation diversity at tree level, the diversity of birds during the busy visiting hours, the initial period of the Tarsius fuscus’ birth). We also observe the equipment and infrastructure of the destination and collected data related to management through interviews with the managers. This study reveals various carrying capacity value which can be used as an option for the managers to choose the best way to manage destination in the right way. The result showed that particular activities exceeded carrying capacity but other activities far below their carrying capacity value. The study furthermore discusses how to deal with numerous activities. It also suggests an increase in the number of visitors by considering their ecological characteristics and management capacity.

Стилі APA, Harvard, Vancouver, ISO та ін.

39

Proffit, Danielle L., Albert L. Lipson, Baofei Pan, Sang-Don Han, Timothy T. Fister, Zhenxing Feng, Brian J. Ingram, Anthony K. Burrell, and John T. Vaughey. "Reducing Side Reactions Using PF6-based Electrolytes in Multivalent Hybrid Cells." MRS Proceedings 1773 (2015): 27–32. http://dx.doi.org/10.1557/opl.2015.590.

Повний текст джерела

Анотація:

ABSTRACTThe need for higher energy density batteries has spawned recent renewed interest in alternatives to lithium ion batteries, including multivalent chemistries that theoretically can provide twice the volumetric capacity if two electrons can be transferred per intercalating ion. Initial investigations of these chemistries have been limited to date by the lack of understanding of the compatibility between intercalation electrode materials, electrolytes, and current collectors. This work describes the utilization of hybrid cells to evaluate multivalent cathodes, consisting of high surface area carbon anodes and multivalent nonaqueous electrolytes that are compatible with oxide intercalation electrodes. In particular, electrolyte and current collector compatibility was investigated, and it was found that the carbon and active material play an important role in determining the compatibility of PF6-based multivalent electrolytes with carbon-based current collectors. Through the exploration of electrolytes that are compatible with the cathode, new cell chemistries and configurations can be developed, including a magnesium-ion battery with two intercalation host electrodes, which may expand the known Mg-based systems beyond the present state of the art sulfide-based cathodes with organohalide-magnesium based electrolytes.

Стилі APA, Harvard, Vancouver, ISO та ін.

40

Batista, Danielle Da Silva, Jonathan Willian Zangeski Novais, Susana Pacheco Pereira, Roberta Daniela de Souza Lauxen da Silva, Thiago Fernandes, Valery Kessis da Silva Pires, Pricila Juliana de Souza, and Ana Carolina Freitas da Silva Taques. "Principal components analysis of the chemical attributes of the soil of a preserved Cerrado fragment." Nature and Conservation 14, no. 1 (October 25, 2020): 90–100. http://dx.doi.org/10.6008/cbpc2318-2881.2021.001.0010.

Повний текст джерела

Анотація:

The number of studies on the importance of Cerrado soil to biogeochemical cycles is growing, with this being the focus of most research in the Cerrado biome. The objective of this research was to verify the correlation among different chemical attributes of the soil in a Cerrado fragment located in Mãe Bonifácia Park, in Cuiabá, Mato Grosso (MT), Brazil, using principal components analysis. For this study, five soil samples were collected at 0-10 cm depth monthly from August 2015 to July 2016. After the collection and identification of the soil, chemical analyses were performed to determine the following chemical characteristics of the soil: organic matter (OM), base saturation (V%), sum of bases (SB), cation exchange capacity (CTC), pH, and concentrations of H+, Al3+, Ca2+, Mg2+, K+, P, S, Cu, Mn2+, Mg2+, Zn, Fe2+ and B3+. The soil was characterized as acidic, which is typical for Cerrado soils, although some chemical elements were found in high concentrations. After the analysis of principal components, it was possible to reduce the seventeen original variables to four principal components that represented 88.86% of the total variation of the data. In which the first main component explained 41.18%, the second component explained 28.39%, the third 11.29% and the fourth explained 7.98%. Based on this analysis, it was identified that the chemical attributes such as the sum of base (SB), organic matter (OM), cation exchange capacity (CTC), calcium (Ca2+), saturation (V%) and pH represented the greater data variance.

Стилі APA, Harvard, Vancouver, ISO та ін.

41

Wu, Zhiyong, Hongping Wang, Yiwen Zhang, and Minglu Ai. "ABB robot data collection based on dynamic link library." Journal of Physics: Conference Series 2113, no. 1 (November 1, 2021): 012077. http://dx.doi.org/10.1088/1742-6596/2113/1/012077.

Повний текст джерела

Анотація:

Abstract At present, with the development of the times and technology, in order to meet the needs of industrial production, robots have begun to be widely used in factories. Although the production efficiency of the robot is very high and relatively cheap compared to the labor cost, when an industrial robot fails, it will have a serious impact on the production capacity of the entire production line. Therefore, it is necessary to monitor various data of the robot. If some abnormal data can be found, it can perform effective predictive maintenance on the robot. This article mainly proposes a method for various data acquisition of ABB robots. The data acquisition interface is developed using C# and the dynamic link library is called. The data of ABB robots can be read in real time. It can realize real-time monitoring of each data of the robot.

Стилі APA, Harvard, Vancouver, ISO та ін.

42

Lin, Ruoxu, Shichao Zhang, Zhijia Du, Hua Fang, Yanbiao Ren, and Xiaomeng Wu. "Copper nanowires based current collector for light-weight and flexible composite silicon anode with high stability and specific capacity." RSC Advances 5, no. 106 (2015): 87090–97. http://dx.doi.org/10.1039/c5ra13568k.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

43

Dussault, Gilles, Laurence Codjia, Kathy Kantengwga, and Kate Tulenko. "Assessing the capacity to produce health personnel in Rwanda." Leadership in Health Services 21, no. 4 (October 3, 2008): 290–306. http://dx.doi.org/10.1108/17511870810910092.

Повний текст джерела

Анотація:

PurposeThe purpose of this paper is to present the results of a study to assess the capacity of a poor country to scale‐up its production of health workers.Design/methodology/approachThe assessment consisted of a survey of institutions training doctors, nurses and technicians in Rwanda. Data on student intake, teaching staff, infrastructures and equipment were collected directly from the institutions by questionnaire administered in person. Data for the qualitative assessment of current and future capacity of production were collected by interviews.FindingsPhysical capacity in terms of classrooms and dormitories was generally good, except at the Faculty of Medicine. Laboratories and libraries were considered inadequate everywhere. Few national teachers hold a PhD and dependence on foreign trainers is high. Nursing teachers' training is also insufficient, particularly in pedagogy. As trainers are young, providing them with additional training should be easier. All institutions reported insufficient budgets. Managerial competencies are not developed. There is no licensing mechanism to ensure quality maintenance.Research limitations/implicationsThere is no validated data base on training institutions and the research had to rely on self‐reported statistics and other information.Practical implicationsA rapid increase in the production of health personnel would be difficult in the current conditions. Production strengthening should involve stakeholders from training institutions, and include measures to motivate and retain trainers, and to improve the quality of training.Originality/valueThe authors are not aware of similar studies in low income countries. Their methodology can be of interest to researchers and policy‐makers who do not have access to baseline data.

Стилі APA, Harvard, Vancouver, ISO та ін.

44

Ye, Xiaofei, Xingchen Yan, Jun Chen, Tao Wang, and Zhao Yang. "Impact of Curbside Parking on Bicycle Lane Capacity in Nanjing, China." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 31 (April 20, 2018): 120–29. http://dx.doi.org/10.1177/0361198118758334.

Повний текст джерела

Анотація:

As roadway resources are being occupied by curbside parking and because of the operational characteristics of parking maneuvers, the capacity of the adjacent travel lane can be significantly reduced. To analyze the influence of curbside parking on the capacity of the bicycle lane, a conflict technique based on additive conflict flow was applied to establish the base capacity model. The actual capacity of the bicycle lane with curb parking was then established by adjusting the base capacity to reflect the influence: lane width, the time influence of parking maneuvers, and proportion of e-bikes. Eight datasets from the exclusive bicycle lanes with different widths and parking maneuvers were collected in Nanjing, China for calibration and evaluation purposes. As a result of a higher number of parking maneuvers, the Emeiling Road was taken as the main case study. The capacity of the bicycle lane was calculated, and the effectiveness of the proposed method was validated by the speed-density-volume relationship model. The proposed model was applied to analyze the effect of different positions of parking berths on the capacity. The results indicate that, with around 65% share of e-bikes, the estimated capacity of Emeiling Road is 2622 bicycles/h, decreasing by 47.10% under the influence of curbside parking. The results also imply that the berths near the openings of the isolation belt have less influence than those in the middle position. These findings could be helpful and useful for practitioners to improve the capacity of bicycle lanes under the influence of curbside parking.

Стилі APA, Harvard, Vancouver, ISO та ін.

45

Fourati, Walid, and Bernhard Friedrich. "Trajectory-Based Measurement of Signalized Intersection Capacity." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 10 (May 18, 2019): 370–80. http://dx.doi.org/10.1177/0361198119848412.

Повний текст джерела

Анотація:

Capacities of road intersections are a limiting factor and crucial for the performance of road networks. Therefore, for purposes of intersection design and of optimal signal timing, numerous methodologies have been proposed to either estimate or directly measure the capacity of single movements at road intersections. However, both model-based estimation and direct measurement suffer from the large effort that is needed to gather the relevant data. Even worse, once the data are collected they only represent a snapshot of the capacity over time. This paper proposes an alternative approach to estimate capacity of signalized road intersections over time using only automatically generated trajectories of probe vehicles. The obtained capacity can be used to evaluate the effective degree of saturation using real demand, or to assess hypothetic different conditions in demand or signaling. The cyclic operation of signalized intersections allows for the accumulation of trajectories, and thus in practical applications for the compensation of potentially low penetration rates. Within a sequential process the intersection’s cycle time and the approach green time and saturation flow rates are determined. The determination of the cycle time and the green times is based on an existing approach. The derivation of the saturation flow rates relies on its direct dependency to the saturation time headway and uses two parameters to be calibrated. Testing with a commercial dataset on an intersection in Munich produced a good signal timing estimation and saturation flow values that are comparable to a calculation based on the German guideline.

Стилі APA, Harvard, Vancouver, ISO та ін.

46

Nakano, Kosei, Hiroyuki Motozuka, Gaius Yao Huang Wee, Masataka Irie, Akihiro Egami, Takenori Sakamoto, Koji Takinami, and Kazuaki Takahashi. "High-Capacity Data Collection Platform for Smart Cities Using IEEE 802.11ad-Based Millimeter-Wave V2X Communication." Wireless Communications and Mobile Computing 2022 (July 9, 2022): 1–13. http://dx.doi.org/10.1155/2022/3909685.

Повний текст джерела

Анотація:

The collection and utilization of huge sensor data from vehicles for visualizing the city is expected to realize various enhanced services for smart cities. A next-generation gigabit vehicle-to-everything (V2X) data collection platform based on 60 GHz millimeter-wave (mmWave) small cell radio access has been proposed in the previous work for enabling efficient and high-capacity data upload from vehicles to the cloud. This paper presents further analysis of the initial link setup delay to evaluate the effectiveness of the fast initial V2X link setup method proposed, which is suitable for 60 GHz communication based on IEEE 802.11ad. This paper also presents the application programming interface (API) design based on the hypertext transport protocol (HTTP) to enable the efficient upload of hundreds of files. Combined with the buffering technique at a multiaccess edge computing (MEC) server, the proposed system successfully utilizes very high bandwidth between a vehicle and a MEC server. The proposed methods achieve a 30 times improvement in delay for establishing the initial link and an 11 times higher average throughput. A prototype system installed in Marysville, Ohio, achieved a peak throughput of 2.8 Gbps and successfully demonstrates the effectiveness of city visualization based on high-capacity data collection and analytics.

Стилі APA, Harvard, Vancouver, ISO та ін.

47

Wang, Weiguo, Guoliang Dai, Jiabei Wei, Arezoo Rahimi, and Qian Zhai. "Effect of Base Grouting on the Bearing Capacity of Bored Piles." Sustainability 15, no. 5 (February 24, 2023): 4148. http://dx.doi.org/10.3390/su15054148.

Повний текст джерела

Анотація:

Post-grouting is a widely used technology for ground improvement and the strengthening of bored pile foundations. In situ experiments have shown that post-grouting is effective in improving the bearing capacity of bored piles. However, due to the cost and complexity of the in situ tests, the total number of test piles is limited. Therefore, it is not surprising that uncertainty is always associated with the collected data. This may significantly affect the conclusion of analyses, and most current studies have neglected this effect. In this paper, statistical analyses were carried out in order to investigate the effect of uncertainties in the data and the impact of post-grouting on the bearing behaviors of bored piles. The results show that post-grouting can significantly improve the bearing behavior of piles. This study is expected to provide technical guidance for post-grouting in foundation engineering.

Стилі APA, Harvard, Vancouver, ISO та ін.

48

Tang, Jun Qing, Jing Liu, Xiao Cong Gong, Hong Hui Dong, Yi Fan Gao, and Zhi Wei Teng. "The Dynamic Collection of Detection Data Based on Priority Assignment and Slicing Sequence." Applied Mechanics and Materials 513-517 (February 2014): 713–16. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.713.

Повний текст джерела

Анотація:

Large-capacity vehicle transmission technology, including dynamic collection of the detection data, has an important significance on the safety detection of the city rail train which is related to the safety of rail transit operation. On the basis of the classification and priority assignment of the detection data, this paper adopts slice sequence dynamic extraction algorithm to establish the information transmission priority queue.

Стилі APA, Harvard, Vancouver, ISO та ін.

49

Khan, Muhammad Umair, Gul Hassan, Muhammad Asim Raza, and Jin Ho Bae. "Liquid Capacitor Based on Hafnium Oxide." Key Engineering Materials 801 (May 2019): 211–16. http://dx.doi.org/10.4028/www.scientific.net/kem.801.211.

Повний текст джерела

Анотація:

In this work, we synthesize Hafnium (IV) oxide (HfO2) ink from hafnium chloride (HfCl4) powder assisted with deionized water. The poly acrylic acid (PAA) is used as surfactant to decrease the surface tension. Conversion of HfCl4 into HfO2 was detected by Raman spectroscopy and energy dispersive X-ray spectroscopy (EDS) characterization techniques. This proposed ink can be easily synthesized at a low temperature. Using the synthesis ink, a liquid capacitor is proposed, which is tested for electrochemical analysis. Indium tin oxide (ITO) coated PET is used as bottom and top current collector electrode, polydimethylsiloxane (PDMS) mold is used as separator, and HfO2 ink is used as aqueous electrolyte. Liquid capacitor is also tested on different bending diameters using bending machine from flat down to 10 mm bending curvature, which shows a stable capacitor function.

Стилі APA, Harvard, Vancouver, ISO та ін.

50

Baltes, Paul B., Karl Ulrich Mayer, Hanfried Helmchen, and Elisabeth Steinhagen-Thiessen. "The Berlin Aging Study (BASE): Overview and Design." Ageing and Society 13, no. 4 (December 1993): 483–515. http://dx.doi.org/10.1017/s0144686x00001343.

Повний текст джерела

Анотація:

ABSTRACTThis article, the introduction to a collection of six related articles, describes the general rationale and design of the Berlin Aging Study (BASE). The distinguishing features of BASE are: (1) a special focus on the very old (70–105 years), (2) broad inter-diciplinarity (medicine, psychiatry, psychology, sociology and economics), and (3) sample heterogeneity achieved by local (West Berlin) representativeness. In addition to discipline-specific topics, four theoretical orientations guide the study: (1) differential ageing, (2) continuity versus discontinuity of ageing, (3) range and limits of plasticity and reserve capacity, and (4) ageing as an inter-disciplinary and systemic phenomenon. To provide a foundation and framework for the remaining articles, this paper outlines the protocols, designs, and measurement procedures of fourteen data collection sessions. In addition, information is given on the samples used for empirical analysis. Two samples from the first wave of the Berlin Aging Study are addressed in this collection of articles. The first (N = 360), uses data from the BASE Intake Assessment Protocol (Session 1). The second (N = 156), employs data from the entire 14-session full protocol of BASE. Selectivity analyses involving 22 comparison variables are reported in this paper and demonstrate that, with the exception of 12-month mortality, these two samples displayed the intended sample heterogeneity. Those results suggest that data from BASE hold high generalizability.

Стилі APA, Harvard, Vancouver, ISO та ін.

Статті в журналах з теми "Collector Base Capacity"

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями