Статті в журналах: "Tank industry Noise control"

1

Yalçın, Barıs Can, Muhammet Balcılar, and Ahmet Koyun. "Design and Implementation of Kalman Filter for Fuel Pipe Damping Test Machine Working Based on Variable Frequency Vibration Principle." Measurement and Control 50, no. 9-10 (November 2017): 199–205. http://dx.doi.org/10.1177/0020294017738196.

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Fuel pipes popularly used in automotive industry applications carry fuel from the fuel tank to the engine and work under variable vibrations having different magnitude and frequency parameters due to the engine’s rotation frequency and road profile’s spontaneous change. Considering that the transfer of the fuel to the engine in the desired way has a crucial importance on the driving performance, any problem that may exist because of the vibrations cannot be acceptable in the pipe assembly. Because of this reason, all manufactured fuel pipes have to be well tested in terms of some industrial standards. The fluid excitement test is a very useful and commonly accepted method in the industry. However, this method produces enormous amount of noise that does not allow to obtain healthy pressure values from the sensors. In this study, Kalman filtering method has been used to interpret the data that have been obtained from the sensors. The usefulness and effectiveness of the proposed Kalman filtering method have been shown and discussed based on the test results.

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2

Li, Guanru, Lei Pan, Qingsong Hua, Li Sun, and Kwang Y. Lee. "Water Pump Control: A Hybrid Data-Driven and Model-Assisted Active Disturbance Rejection Approach." Water 11, no. 5 (May 22, 2019): 1066. http://dx.doi.org/10.3390/w11051066.

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Water pump control, prevalent in various industrial plants, such as wastewater treatment and steam generator facilities, plays a significant role in maintaining economic efficiency and stable plant operation. Due to its slow dynamics, strong nonlinearity, and various disturbances, it is also widely studied as a typical benchmark problem in process control. The current control strategies can be categorized into two aspects: one branch resorts to model-based design and the other to data-driven design. To merge the merits and overcome the deficiencies of each paradigm, this paper proposes a hybrid data-driven and model-assisted control strategy, namely modified active disturbance rejection control (MADRC). The model information regarding water dynamics is incorporated into an extended state observer (ESO), which is used to estimate and mitigate the limitations of slow dynamics, strong nonlinearity, and various disturbances by analyzing the real-time data. The tuning formula is given in terms of the desired closed-loop performance. It is shown that MADRC is able to produce a satisfactory control performance while maintaining a low sensitivity to the measurement noise under general parametric setting conditions. The simulation results verify the clear superiority of MADRC over the proportional-integral (PI) controller and the conventional ADRC, and the results also evidence its noise reduction effects. The experimental results agree well with the simulation results based on a water tank setup. The proposed MADRC approach is able to improve the control performance while reducing the actuator fluctuation. The results presented in this paper offer a promising methodology for the water control loops widely used in the water industry.

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3

He, Yirong, Zhixin Zeng, Yanglei Yu, and Dengfang Ruan. "Liquid fuel sloshing control of an automotive fuel tank." Noise & Vibration Worldwide 50, no. 7 (July 2019): 227–36. http://dx.doi.org/10.1177/0957456519860849.

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In order to reduce the influence of fuel sloshing on the interior noise of a passenger car, the fuel tank sloshing noise was first evaluated with a subjective evaluation method to determine the driving cycle of the car and the fuel filling percentage of the fuel tank in which the fuel tank sloshing noise is serious, and then two anti-wave boards with different structural characteristics were designed to reduce the fuel sloshing. On this basis, fuel sloshing in the fuel tank equipped with the newly designed and original anti-wave boards was simulated numerically; then, the anti-wave board with the best effect of inhibiting fuel from sloshing was selected based on the numerical results; finally, the anti-sloshing effect of the selected board was evaluated through the car road test. The test results show that the vibration acceleration magnitude at each monitoring point of the tank with the selected anti-wave board is significantly reduced compared with the original fuel tank, which indicates that the selected anti-wave board inhibits fuel from sloshing greatly.

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4

Liu, Mei, Jiachang Li, Ying Liufu, Wenhui Duan, Xiuchun Xiao, and Long Jin. "Noise-rejection zeroing dynamics for control of industrial agitator tank." Nonlinear Dynamics 103, no. 3 (February 2021): 2581–603. http://dx.doi.org/10.1007/s11071-021-06233-5.

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5

Snow, D. J. "Noise control in power plant." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 211, no. 1 (February 1, 1997): 73–93. http://dx.doi.org/10.1243/0957650971537015.

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During the last decade the shape of the UK non-nuclear electricity generation industry has changed fundamentally from a stable monopoly providing power primarily from large coal-fired units to a rapidly developing competitive industry with a wide range of plant types. The removal of the restrictions on burning natural gas in power stations and the introduction of flue gas desulphurization on some of the traditional plants has highlighted the reduced cost and lower emissions of gas-powered generation, leading to a major increase in the use of this fuel in more efficient combined cycle gas turbine (CCGT) plant. Outside the United Kingdom, the economics and politics of fuel supply and electricity production may be different, and both traditional plant and new CCGT projects are being constructed in overseas markets by UK utilities, often in partnership arrangements with other companies. In parallel with these developments there is significant new effort expended on the development of combined heat and power (CHP) plant and renewable energy sources, especially wind power. Although relatively small in MW terms, the latter plant type presents significant and particular noise control requirements. On the horizon, new coal plant using coal gasification or fluidized bed technologies may be anticipated. At the same time as these major changes in plant selection are occurring there are simultaneous developments in the methods of environmental noise assessment. In this article the use of noise control within the electricity generation industry is reviewed and the influence of the changing trends in plant and environmental noise assessment are discussed.

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6

Yu, Yan Xin, and Xue Song. "Improved Modeling and PID Control Algorithm for Three-Tank Liquid Level System." Advanced Materials Research 442 (January 2012): 176–79. http://dx.doi.org/10.4028/www.scientific.net/amr.442.176.

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Three-tank liquid level system is a more typical non-linear and delay object with strong representation and background of industry. The part or whole of many objects can be abstracted into a mathematical model of three-tank liquid level system. Research on modeling and control of the system has important theoretical significance and practical value. This article describes how to use Simulink function to establish the mechanism of three-tank liquid level system model. And at the time, an improved PID control algorithm is proposed. The results show that it has more superior performance for three-tank liquid level system simulation control compared with the traditional PID control algorithm.

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7

Tripathy, Debi Prasad, and SANTOSH KUMAR NANDA. "Noise identification, modeling, and control in mining industry." Journal of the Acoustical Society of America 137, no. 4 (April 2015): 2377. http://dx.doi.org/10.1121/1.4920637.

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8

MÉNDEZ, A. REGALADO, and J. ÁLVAREZ-RAMÍREZ. "COMPOSITION LINEAR CONTROL IN STIRRED TANK CHEMICAL REACTORS." New Mathematics and Natural Computation 03, no. 03 (November 2007): 385–98. http://dx.doi.org/10.1142/s1793005707000859.

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This work studies loop control composition in continuous chemical reactors with simple structures, due to its large acceptance in chemical industry. A linear cascade composition control (master/slave) is proposed, designed with basic control structures based on Laplace tools. Two configurations are designed, which were evaluated in a dynamic model of continuous stirred tank. From a stability analysis it is noted that, for such configurations, system assent time is 7 to 8 times reduced if compared to the assent time without loop control. Besides, the system shows a good performance when coming to the asked reference. Implementation of such control configurations can solve the problem of loop control composition.

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9

Varadan, Vasundara V., Suk‐Yoon Hong, and Vijay K. Varadan. "Active control of radiated noise and vibrations from an automobile fuel tank." Journal of the Acoustical Society of America 93, no. 4 (April 1993): 2352. http://dx.doi.org/10.1121/1.406242.

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10

Abdelmonem, Nabil, and Sohair I. Abou-Elela. "In-Plant Control in Oil and Soap Industry." Water Science and Technology 29, no. 9 (May 1, 1994): 143–49. http://dx.doi.org/10.2166/wst.1994.0464.

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ln-planl control measures in the different manufacturing units in an Oil and Soap Company were carried out. The hot spent lye at 105°C can be saponified again with a predetermined free fatty acid produced in the plant in order to recover soap and to avoid excessive foams. Also, recovery of residual soap resulting from steam blowing during shutdown periods was achieved by using a Jacketed storage tank heated with steam. The techno-economic study for this proposal revealed that the total saving per year is 237,000 L.E. and the percentage return on investment is almost 86%, while the payout period is 0.2 month. Also, the implementation of any possible housekeeping was taken into consideration.

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11

Bhat, Vinayambika S., I. Thirunavukkarasu, S. Shanmuga Priya, and C. Shreesha. "Predictive Control Algorithm Based on Integral Action-Design and Implementation on a Conical Tank System." MATEC Web of Conferences 153 (2018): 06010. http://dx.doi.org/10.1051/matecconf/201815306010.

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This article presents a Model Predictive Control (MPC) algorithm based on integral action. Level control in process industry is challenging because of nonlinearity presents in the shape of the tank, actuators etc. The conical tank system is taken as benchmark process in the present study. It is Single Input Single Output (SISO) nonlinear system whose cross-sectional area varies along the tank height. The control algorithm is simulated using MATLAB m-file environment. The effectiveness of the predictive algorithm is also presented by experimentally validating it on a conical tank system at different heights. The interfacing of m-file with the experimental setup is the challenging task faced during the initial stage of experimental validation.

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12

Al-Yacouby, Ahmad Mahamad, and Mostafa Mohamed Ahmed. "A Numerical Study on the Effects of Perforated and Imperforate Baffles on the Sloshing Pressure of a Rectangular Tank." Journal of Marine Science and Engineering 10, no. 10 (September 20, 2022): 1335. http://dx.doi.org/10.3390/jmse10101335.

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Sloshing has many industry applications, namely in offshore engineering, aerospace, ship building, and manufacturing. Sloshing simulation is essential to better understand the sloshing pattern and consequently to improve the tank design to reduce noise levels, stresses on the structure, and optimize the baffle configurations and arrangements. Thus, the aim of this study is to determine the effects of perforated (porous) and imperforate (solid) baffles on the sloshing pressure using ANSYS FLUENT software based on Volume of Fluid (VOF) method where a rectangular tank with 25% and 60% filling ratios was considered. In the first case, an unbaffled rectangular tank with 60% filling ratio was used for the validation purpose, while in the second case, a 25% filling ratio was investigated considering two scenarios, namely a unbaffled tank and a baffled tank case with perforated and imperforate baffles. The outcomes of the results indicate that perforated baffle can significantly reduce the sloshing pressure in the tank. The validation of the results also shows a good agreement with the published experimental results.

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13

Brooks, Bennett M., and Frank H. Brittain. "An overview of noise control in the power industry." Journal of the Acoustical Society of America 90, no. 4 (October 1991): 2242. http://dx.doi.org/10.1121/1.401527.

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14

Yuchao, Ma, Mo Juan, Yu Jinshan, Li Xiang, and Zheng Zhongyuan. "Study on Sound Field Distribution Rule for Tank Structures of Large Oil-immersed Transformers." E3S Web of Conferences 233 (2021): 01021. http://dx.doi.org/10.1051/e3sconf/202123301021.

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Large oil-immersed transformers are an important part of the transmission and distribution network in power systems. Power transformers are the main noise source of substations. Because of the uneven manufacturing process, aging equipment, long-term operation, and close distance from sensitive points, the problem of transformer noise pollution has become increasingly prominent. In this paper, the transmission and analysis model is established for transformer sound waves on the interface between insulating oil and tank body according to the sound wave propagation rule in complicated medium, and the simplified acoustic simulation model is constructed for large oil-immersed transformers by simulating the vibration noise of transformer core with monopole sound source, with which, the sound field distribution rule inside and outside the transformer tank structure is obtained, and finally, the influence factors for noise distribution are given. The results of the study provide control basis for reducing transformer noise.

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15

A, Ardilessi. "Tank Volume Control Using LabVIEW and Arduino UNO." Telekontran : Jurnal Ilmiah Telekomunikasi, Kendali dan Elektronika Terapan 3, no. 2 (July 22, 2019): 28–35. http://dx.doi.org/10.34010/telekontran.v3i2.1880.

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Abstract - Rapid technological developments in contemporary times also affected the development of the toolsin an industry.Equipment in an industry that was once driven manually by humans are now beginning to be controlled automatically. One of the automatic controller system that is widely used in an industrial controller system is proportional integral derivative (PID). PID controller consists of three kinds of methods that the controller proportional controller, the integral controller, and derivative controller. Controlling the height levels of the system is done through LabView 2013. Arduino UNO board is used to process the data on the flow sensor and height sensor.Data obtained from the height sensor and flow sensor is used to set the input and output water tank so that the water level in accordance with the desired height. From the test results, using Ti as an input parameter in the integral action zigler – Nichols method. Condition stable and constant oscillation at the output level elevation will be obtained, when the conditions given parameter value Ti is getting bigger and parameter values Kp given increasingly smaller. By using the parameters obtained from the calculation using the method zigler – Nichols, obtained results faster output stable when using a PI controller. Keyword : Controller, Proportional Integral Derivative, Ziegler-Nichols, LabView

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16

Zhou, Haijun. "Application of Virtualization for Process Control Experiments." Journal of Physics: Conference Series 2160, no. 1 (January 1, 2022): 012034. http://dx.doi.org/10.1088/1742-6596/2160/1/012034.

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Abstract The virtualization of the Festo process control teaching platform and the implementation process of extending it with real industry applications are introduced. Taking the heating process of the water tank as an example, the model extraction method of the real object is analyzed in detail, and the model identification problem of the low-order linear control object is solved. Through the introduction of the creation process of the object model on the virtual platform, a feasible way is pointed out for similar applications. On this basis, it is proposed to integrate the teaching platform with the specific industrial industry in the virtualized environment, broaden the breadth of process control teaching, and point out new ideas for building a teaching profession with industry support.

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17

Kurniawan, Fani, Yulian Zetta Maulana, and Risa Farrid Christianti. "Sistem Kendali Level Ketinggian Air Berbasis Fuzzy Control Menggunakan Simulink." Techné : Jurnal Ilmiah Elektroteknika 21, no. 1 (April 11, 2022): 17–30. http://dx.doi.org/10.31358/techne.v21i1.287.

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Today's technology shows very significant developments in automation systems. Filling water in a tank is a process that is widely used in the oil industry. The process of filling and draining water in a closed water tank will raise difficulty for the operator to control the water level in the tank. Therefore, we will create a system to control the water level using a fuzzy controller. To get the value of fuzzification from the difference in the value of the set point and defuzzification connected to the motor pump. Fuzzy design system was obtained by making methods, fuzzification, defuzzification, and rules. The use of ultrasonic sensors during the experiment caused a spike in value because the ultrasonic sensor had not detected water but had no significant effect on the response to altitude levels. When the valve is opened, the controller has an effect on the resulting response. The more the valve is opened, the worse the response will be but the system remains stable. The fuzzy output will be connected to the PLC which will be connected to the Kepserver and tank to regulate the flow rate to the tank. Matlab is connected with PLC devices using Kepserver. The best performance is found in the 2× reduction valve opening response test with a fuzzification range of 8000-24000 while the performance value of time rise is 66.458 s, settling time is 110 s, steady state error is -2%, and overshoot is 9%.

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18

Mohamed, Mohamed, Mohamed Mahmoud Hafez, Ragab Rabeiy, and Essam El Nagreedy. "Noise Pollution; Assessing and Control in the Beet Sugar Industry." Egyptian Sugar Journal 15 (December 1, 2020): 39–51. http://dx.doi.org/10.21608/esugj.2020.209514.

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19

Tapley, Edward L. "A Review of “Noise Control in Industry: A Practical Guide”." American Industrial Hygiene Association Journal 58, no. 12 (December 1997): 905. http://dx.doi.org/10.1080/00028894.1997.10399388.

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20

Suriyakala, S., T. Hariharasudhan, and Dr D. Prince Winston. "Identification and Control of Non-Linear System Using Model Predictive controller." YMER Digital 21, no. 03 (March 11, 2022): 165–73. http://dx.doi.org/10.37896/ymer21.03/19.

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The modeling of level and temperature process is the most common problems in the process industry. In this paper system identification is performed for a hybrid tank system. Hybrid tank is an example for highly non-linear system. This system has two inputs heater current and flow and the outputs are level and temperature. The Main aim of this paper is to maintain level and temperature at a desired value. Input flow is measured using turbine flow meter. The output temperature is measured using RTD. The level is measured using differential pressure transmitter (DPT). The simulation is performed in MATLAB environment using system identification algorithm. Model Predictive controller is implemented for this identified model.

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21

Ma, Quyang, Zhenhuan Wu, Guoan Yang, Yue Ming, and Zheng Xu. "Pulsation suppression in a reciprocating compressor piping system using a two-tank element." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 232, no. 4 (June 6, 2017): 427–37. http://dx.doi.org/10.1177/0954408917713436.

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Gas pulsations excited by reciprocating compressors could introduce severe vibrations and noise in piping systems. When pulsating gas flows through the reducers, the changes in flow characteristics, such as velocity and damping coefficient, will affect the pressure pulsations. To circumvent these constraints, a two-tank element is introduced to control the gas pulsation that is still strong in the piping system with a surge tank. Installing another surge tank to form a two-tank element is more flexible and costs lower than replacing the original surge tank with a larger one. In this work, a theoretical model based on the wave theory was proposed to study the transferring mechanism of gas pulsations in the pipeline with the two-tank element. By considering the damping coefficient and the Mach number, the distributions of the pressure pulsations were predicted by the theoretical model and agreed with the three-dimensional fluid dynamics transient analysis. Three experiments were conducted to prove that the suppression capability of the two-tank element is as good as that of a single-tank element (surge tank) with the same surge volume. The volume optimization of the two-tank element is implemented by selecting the best allocations of the two tanks’ volumes to achieve larger reductions of pressure pulsations. Assuming that the total surge volume is constant, we found that the smaller the volume of the front tank (near the cylinder) is, the lower the pulsation levels are. The optimized result proves that in some conditions the two-tank element could control pulsations better than the single-tank element with the same surge volume.

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22

Vojtesek, Jiri, and Petr Dostal. "Nonlinear versus Ordinary Adaptive Control of Continuous Stirred-Tank Reactor." Scientific World Journal 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/389273.

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Unfortunately, the major group of the systems in industry has nonlinear behavior and control of such processes with conventional control approaches with fixed parameters causes problems and suboptimal or unstable control results. An adaptive control is one way to how we can cope with nonlinearity of the system. This contribution compares classic adaptive control and its modification with Wiener system. This configuration divides nonlinear controller into the dynamic linear part and the static nonlinear part. The dynamic linear part is constructed with the use of polynomial synthesis together with the pole-placement method and the spectral factorization. The static nonlinear part uses static analysis of the controlled plant for introducing the mathematical nonlinear description of the relation between the controlled output and the change of the control input. Proposed controller is tested by the simulations on the mathematical model of the continuous stirred-tank reactor with cooling in the jacket as a typical nonlinear system.

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23

Sebastian, Derek J., Shannon L. Clark, Scott J. Nissen, and Dwight K. Lauer. "Total vegetation control: a comprehensive summary of herbicides, application timings, and resistance management options." Weed Technology 34, no. 2 (September 24, 2019): 155–63. http://dx.doi.org/10.1017/wet.2019.94.

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AbstractTotal vegetation control (TVC) is an essential management practice to eliminate all vegetation for the purpose of protecting infrastructure, people, or natural resources on sites where vegetation poses major fire, visibility, and infrastructure risks. TVC is implemented on sites such as railroads, power substations, airports, roadsides, and oil and gas facilities. Current research has identified that tank-mixing two effective mechanisms of action is a superior resistance management strategy compared to rotating mechanisms of action; however, effective tank mixes for TVC have not been thoroughly evaluated. A field experiment was conducted from 2013 to 2014 at five sites in Colorado to compare 32 treatment combinations to two industry standards for TVC. Research objectives were (1) to identify herbicide tank-mix combinations for TVC with multiple effective mechanisms of action for resistance management, (2) to evaluate lower use rate alternatives to minimize nontarget impacts, and (3) to determine the efficacy of fall versus spring application timings. Seven treatments were identified as top-ranking treatments, averaging 96% bare-ground (BG) across five sites and two application timings. Four out of the seven top-ranked treatments included aminocyclopyrachlor, chlorsulfuron, and indaziflam. The industry standard diuron plus imazapyr was in the top ranking, whereas the other industry standard bromacil plus diuron performed inconsistently across sites. Probability modeling was used to predict the probability of achieving 97% or 100% BG with various treatment combinations. The combination of aminocyclopyrachlor, chlorsulfuron, indaziflam, and imazapyr had the highest predicted BG probability, with 88% predicted probability of achieving 100% BG, compared to 67% and 52% predicted probabilities for the industry standards diuron plus imazapyr and bromacil plus diuron, respectively. In three of the five sites, fall applications outperformed the same treatments applied in the spring. Several top-ranking treatments represent newer, lower use rate herbicide combinations that provide multiple mechanisms of action to manage herbicide-resistant weeds and minimize nontarget impacts.

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Zhang, Shiming, Ruifu Zhang, and Zhipeng Zhao. "Demand-Based Optimal Design of Storage Tank with Inerter System." Shock and Vibration 2017 (2017): 1–14. http://dx.doi.org/10.1155/2017/2956153.

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A parameter optimal design method for a tank with an inerter system is proposed in this study based on the requirements of tank vibration control to improve the effectiveness and efficiency of vibration control. Moreover, a response indicator and a cost control indicator are selected based on the control targets for liquid storage tanks for simultaneously minimizing the dynamic response and controlling costs. These indicators are reformulated through a random vibration analysis under virtual excitation. The problem is then transformed from a multiobjective optimization problem to a single-objective nonlinear problem using the ε-constraint method, which is consistent with the demand-based method. White noise excitation can be used to design the tank with the inerter system under seismic excitation to simplify the calculation. Subsequently, a MATLAB-based calculation program is compiled, and several optimization cases are examined under different excitation conditions. The effectiveness of the demand-based method is proven through a time history analysis. The results show that specific vibration control requirements can be met at the lowest cost with a simultaneous reduction in base shears and overturning base moments.

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25

Мельников, Никита Николаевич. "DEVELOPMENT OF PRODUCTION OF LIGHT TANKS AND SELF-PROPELLED UNITS IN THE USSR DURING THE GREAT PATRIOTIC WAR." Вестник Адыгейского государственного университета, серия «Регионоведение», no. 4(289) (May 23, 2022): 25–33. http://dx.doi.org/10.53598/2410-3691-2021-4-289-25-33.

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Статья посвящена изучению развития географии легкого танкостроения СССР в годы Великой Отечественной войны. В первые месяцы войны советское руководство приняло решение о резком расширении производства легких танков Т-60 на различных предприятиях страны. Простота конструкции этой машины позволила развиваться данному процессу относительно успешно. Осенью 1941 г. легкое танкостроение, как и вся танковая промышленность западной части СССР, было эвакуировано на восток. В результате в первой половине 1942 г. в целом сложилась система танкосборочных и бронекорпусных заводов, которые управлялись наркоматами танковой промышленности и среднего машиностроения. Но уже в середине года мощности предприятий Наркомата танкопрома, занятые в легком танкостроении, начали использоваться для увеличения выпуска средних танков. Отдельно рассмотрен процесс переориентации в течение 1943 г. всех оставшихся производственных площадок на изготовление легких самоходных артиллерийских установок СУ-76. Однако летом 1944 г. в системе Наркомата танкопрома перестало действовать последнее предприятие, выпускавшее легкую бронетехнику: кировский завод № 38 был переброшен в Харьков для организации выпуска новых танков Т-44. Делается вывод о том, что в течение всего периода Великой Отечественной войны наблюдался процесс использования производственных мощностей легкого танкостроения для увеличения выпуска средних танков. The paper is devoted to the study of the development of geography of light tank building in the USSR during the Great Patriotic War. In the first months of the war the Soviet leadership decided to dramatically increase the production of light tanks T-60 at various enterprises of the country. The simplicity of the design of this machine allowed this process to develop relatively successfully. In autumn 1941, the light tank building industry, as well as the whole tank industry of the western part of the USSR was evacuated to the east. As a result, in the first half of 1942 there was a system of tank assembly and armored production plants under the control of Commissariats of Tank Industry and Medium Machine Building. But already in the middle of the year capacity of enterprises of People's Commissariat of Tank Industry engaged in light tank building started to be used for increasing production of medium tanks. The process of reorientation during 1943 of all the remaining production facilities for the production of the light self-propelled artillery systems SU-76 was considered separately. However, in summer 1944 the last enterprise in the system of the People's Commissariat of Tank Industry which produced light armored vehicles ceased to operate: Kirov Plant No.38 was transferred to Kharkov to set up the production of new T-44 tanks. The conclusion is drawn that throughout the entire period of the Great Patriotic War there was a process of using the production capacities of the light tank industry to increase the output of medium tanks.

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Su, Guodong, Dirong Chen, Kaixuan Pang, Haijun Gao, Jiangtao Su, and Lingling Sun. "128.76–129.56 GHz Fundamental Voltage Control Oscillator in 65 nm CMOS." Electronics 9, no. 6 (May 28, 2020): 898. http://dx.doi.org/10.3390/electronics9060898.

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This paper presented a fundamental voltage control oscillator (VCO), and its operating frequency ranged from 128.76 GHz to 129.56 GHz. A differential low negative coupling shield switch (DLNCSS) inductor was proposed and analyzed, which helped to improve the tuning range and phase noise of the presented VCO. Meanwhile, an improved transformer-coupled resonant tank, which consisted of DLNCSS inductor and differential varactor using the common-cathode structure, was used to improve the phase noise of the proposed VCO further. This presented VCO was designed and fabricated by using 65 nm CMOS process, which occupied a compact area of 0.23 mm2, including all testing pads. The measurement results showed that this VCO consumed 11.2 mW from a 1.4 V supply and had the tuning range of 0.8 GHz. The output power ranged from −11.8 dBm to −10.6 dBm in its operating frequency band. The post-layout simulation showed that the phase noise at 1 MHz was better than −82 dBc/Hz.

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Darmoyono, Aditya Gautama, Asrizal Deri Futra, Sumantri R. K, K. Kamarudin, and Muhammad Syafei Gozali. "Desain Prototipe Instrumentation Amplifier untuk Sensor SKU SEN0257 pada Kit Couple Tank." Journal of Applied Electrical Engineering 6, no. 2 (December 30, 2022): 85–88. http://dx.doi.org/10.30871/jaee.v6i2.4828.

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Analog sensors are devices used in the process industry. These sensors can be used to measure the pressure, flow, temperature, and level of a fluid in a tank. A sensor is an important part of a feedback control system that is commonly used in the process industry. In this research, an analog sensor was used to measure water pressure on a couple tank kit, which was SKU SEN0257. This pressure was converted to the depth of the water in the tank. A problem occurred when the dimension of the tank was small, then the depth change of water could not be read by a controller that connected to the sensor. Therefore, a prototype of instrumentation amplifier using IC OP027 was designed. This amplifier was used to increase the output voltage from the sensor so that it could be read by controller. The circuit that has been designed, managed to produce voltage around the desirable value 0-5V. Problem that arise from this research is the fluctuation in the amplified voltage value that need further improvement on the circuit design.

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Ratriwardhani, Ratna Ayu, Merry Sunaryo, Octavianus Hutapea, and Muslikha Nourma Rhomadhoni. "Application of failure mode effect analysis on hazard identification and risk control." Bali Medical Journal 11, no. 2 (August 17, 2022): 892–96. http://dx.doi.org/10.15562/bmj.v11i2.3146.

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Introduction: PT. X is a chemical industry with high hazards, especially those related to hazardous and toxic materials; the company also uses equipment and machines with fire or explosion hazards. Component's failure to operate is a major problem in PT. X. The specific objective of this study was to evaluate hazards and control the risks to prevent accidents and protect company assets, especially for employee safety. Methods: The data collected is Process Flow Diagram (PFD), Material Safety Data Sheet (MSDS), and component failure data. The risk assessment for the components of Sodium Silicate Production is carried out by multiplying the occurrence measurement scale and severity measurement scale. The risk value for the unacceptable risk category is between 12 and 25, where the risk must be controlled first. Results: This study found that the highest risk value is dissolver tank leaks, the production pump not working, and the ball valve stuck. An example of structural mitigation in the dissolver tank is to carry out routine maintenance once a month to know the material's condition and to immediately make repairs if there are signs of tank damage to prevent leakage in the tank. Conclusions: This research proves that some hazards have not been evaluated and controlled, so there are still some failures in the production process of Sodium Silicate.

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Imaduddin, Ilmi Rizki. "Design of Water Level Control in Tank Based on Fuzzy Logic." Buletin Ilmiah Sarjana Teknik Elektro 2, no. 3 (January 3, 2021): 145. http://dx.doi.org/10.12928/biste.v2i3.3307.

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Liquid level control is a regulatory system that is widely used by the petrochemical industry, paper mills, and steam power plants (PLTU). Fuzzy control techniques have light computing capabilities and do not require knowledge of the parameters of the system. The purpose of this research is to design and design a device that can make it easier to adjust the liquid level in the storage tank and observe the fuzzy control performance. Control is done by adjusting the valve opening in the storage tank. From the results of this study, data on setpoint 56 is obtained, the valve is at an angle with all open status (BS), at the first second or 1 second, and at set point 41, the valve is at an angle with a half-closed status (SN), in the 13th second, and the valve will be closed all (NS), if the valve is at an angle at the set point 29, with a time of 1620 seconds or 27 minutes. Based on this research, the proposed system is able to control the water level in the tank using fuzzy control.

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Imaduddin, Ilmi Rizki. "Design of Water Level Control in Tank Based on Fuzzy Logic." Buletin Ilmiah Sarjana Teknik Elektro 2, no. 3 (January 3, 2021): 145. http://dx.doi.org/10.12928/biste.v2i3.3307.

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Анотація:

Liquid level control is a regulatory system that is widely used by the petrochemical industry, paper mills, and steam power plants (PLTU). Fuzzy control techniques have light computing capabilities and do not require knowledge of the parameters of the system. The purpose of this research is to design and design a device that can make it easier to adjust the liquid level in the storage tank and observe the fuzzy control performance. Control is done by adjusting the valve opening in the storage tank. From the results of this study, data on setpoint 56 is obtained, the valve is at an angle with all open status (BS), at the first second or 1 second, and at set point 41, the valve is at an angle with a half-closed status (SN), in the 13th second, and the valve will be closed all (NS), if the valve is at an angle at the set point 29, with a time of 1620 seconds or 27 minutes. Based on this research, the proposed system is able to control the water level in the tank using fuzzy control.

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31

Belfry, Kimberly D., Kristen E. McNaughton, and Peter H. Sikkema. "Weed control in soybean using pyroxasulfone and sulfentrazone." Canadian Journal of Plant Science 95, no. 6 (November 2015): 1199–204. http://dx.doi.org/10.4141/cjps-2015-114.

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Belfry, K. D., McNaughton, K. E. and Sikkema, P. H. 2015. Weed control in soybean using pyroxasulfone and sulfentrazone. Can. J. Plant Sci. 95: 1199–1204. Pyroxasulfone and sulfentrazone are new herbicides currently being evaluated for weed control in soybean [Glycine max (L.) Merr.] in Ontario, Canada. Seven experiments were conducted over a 3-yr period (2011 to 2013) at Ridgetown and Exeter, Ontario, to evaluate weed management using pyroxasulfone, sulfentrazone and their tank-mixes relative to the industry standard, imazethapyr plus metribuzin. Tank-mixing pyroxasulfone and sulfentrazone provided up to 97, 46, 60, 100 and 71% control of common lambsquarters (Chenopodium album L.), common ragweed (Ambrosia artemisiifolia L.), green foxtail [Setaria viridis (L.) Beauv.], Powell amaranth [Amaranthus powellii (S.) Wats.] and velvetleaf (Abutilon theophrasti Medic.), respectively, at 2 wk after treatment. Control with pyroxasulfone and sulfentrazone was improved when tank-mixed, relative to application of each herbicide separately. Although control was variable across weed species, no difference in control was identified between pyroxasulfone plus sulfentrazone and imazethapyr plus metribuzin. Soybean yield was up to 2.7, 2.4 and 2.9 t ha−1 for pyroxasulfone, sulfentrazone and pyroxasulfone plus sulfentrazone application, yet imazethapyr plus metribuzin provided the highest yield (3.3 t ha−1). This research demonstrates that pyroxasulfone plus sulfentrazone may be used as a valuable weed control option in soybean; however, weed community composition may limit herbicidal utility.

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Razavi, Hamideh, Ehsan Ramezanifar, and Jalal Bagherzadeh. "An economic policy for noise control in industry using genetic algorithm." Safety Science 65 (June 2014): 79–85. http://dx.doi.org/10.1016/j.ssci.2013.12.010.

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AYODEJI, OKUBANJO, OKANDEJI ALEXANDER, ALAO PETER, OLALUWOYE OLAWALE, ONAIFO FRANK, and MUFUTAU OLAYEMI. "MODEL IDENTIFICATION AND LEVEL CONTROL OF COUPLED TANKS SYSTEM." Journal of Engineering Studies and Research 26, no. 3 (July 27, 2020): 124–34. http://dx.doi.org/10.29081/jesr.v26i3.214.

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The Couple Tank (CT) system remains as a benchmark to investigate and test new emerging control schemes in the process industry since its dynamic emulates many factual system in the field of process control. In this paper, we examine the performance evaluation of two control algorithms, proportional derivative controller (PD) and proportional-integral-derivative controller (PID). The dynamics of the CT system is experimentally derived by system identification method and validated with a mathematical model that depicts the dynamic behaviour of the coupled tank system. Furthermore, the control schemes are expanded on the model obtained through system identification method. The simulation results showed that the PD controller did not meet all the specified control objectives. To improve the response an integral controller was incorporated to the PD controller and the response was compared to that of the PID controller and uncompensated system. The results revealed that the PID controller satisfied all the control goals. However, the PD controller was more satisfactory in terms of time response criteria.

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34

Kaczmarska, Anna, and Danuta Augustyriska. "Study of Sound Insulation of Control Cabins in Industry in the Low Frequency Range." Journal of Low Frequency Noise, Vibration and Active Control 11, no. 2 (June 1992): 42–46. http://dx.doi.org/10.1177/026309239201100202.

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The number of control cabins installed in industry has increased considerably during the last few years. Most cabins installed nowadays show a satisfactory noise reduction in the frequency range above 500 Hz. The effect of noise damping however shows a gradual decrease for lower frequencies. The present paper is a description of the distribution of low frequency noise in different types of control cabins installed in typical low frequency noise environments in steel plants and the machine building industry. Measurements were made in 20 control cabins, constructed of metal and stone Measurements of sound pressure levels in octave bands were made inside and outside the cabins. The sound pressure level in octave bands in the low frequency range (4–31.5 Hz) inside the cabins was high and varied between 60–108 dB. This is probably due to the insufficient noise reduction for lower frequencies. In some control cabins there was an increased level of low frequency noise inside the cabin compared to the outside. In these control cabins sound pressure levels exceed the admissible values according to Polish standards. The increase of noise level within the low frequency range is considered to be based on resonances.

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35

Zheng, Zhong Qiao, Yan Hong Zhang, and Jian Sheng Zhang. "Application of Kalman Filter in DC Motor Speed Control System." Applied Mechanics and Materials 150 (January 2012): 129–32. http://dx.doi.org/10.4028/www.scientific.net/amm.150.129.

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PID controller is widely used in industry field, but when the industry presence exists noise interference, it is difficult for the conventional PID controller to achieve the expected control effect, in view of this situation, the method of combinating Kalman filter with the PID control is studied in this paper, the DC motor speed control system is simulated, the results shows that the PID controller based on Kalman filter is better to inhibit the effect of white noise, and it has a good dynamic response characteristics.

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36

Lin, Hui Dan, and Geng Jun Gao. "Study on Transportation Safety Management of Sodium Cyanide." Applied Mechanics and Materials 482 (December 2013): 403–8. http://dx.doi.org/10.4028/www.scientific.net/amm.482.403.

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As an important raw material of chemical industry, logistics and transportation quantity of sodium cyanide is sharply increased. However, the accidents of sodium cyanide ISO-tank transportation are frequently happened, which caused huge negative impacts on the society and the environment because of its high toxicity. In order to ensure smooth transportation of the hazardous chemicals, we must strive to control the dangerous sources of transportation to eliminate and reduce accidents for the safety and property of the people. On the basis of risk analysis of ISO-tank transport of sodium cyanide, this paper studies the reasons leading to accidents on the point of people, vehicles, ISO-tanks, roads and managements in detail. At last, it focuses on the countermeasures for safety management of sodium cyanide ISO-tank transport on the view of safety assessment in order to provide some guidance for the healthy and sustainable development of this industry. Key words: sodium cyanide;transportation; safety assessment

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Ayten, Kagan Koray, Ahmet Dumlu, and Aliriza Kaleli. "Real-time implementation of self-tuning regulator control technique for coupled tank industrial process system." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 232, no. 8 (May 19, 2018): 1039–52. http://dx.doi.org/10.1177/0959651818773179.

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This article presents the self-tuning regulator control technique for a coupled tank liquid level system that often used in industry. An autoregressive with exogenous model has been used as the liquid process model with the self-tuning control implementation in order to track the desired tank level trajectories with disturbances and uncertainties of the system dynamics. The designed self-tuning controller has been sensitive to parameter variations of the nonlinear coupled tank system. The parameters of the proposed controller are periodically updated themselves during the process by means of online recursive least square method with the forgetting factor algorithm. In this way, the parameter variations and unwanted disturbances of the system are eliminated in real-time application. In order to demonstrate the efficiency of the self-tuning regulator control technique, the real-time studies have been executed. The obtained experimental results demonstrated that the proposed controller gives the better trajectory tracking performance and smaller magnitude in overshot and undershot than the designed classical proportional–integral and sliding mode controllers.

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38

Djaksana, Yan Mitha, and Kelvin Gunawan. "PERANCANGAN SISTEM MONITORING DAN KONTROLING POMPA AIR BERBASIS ANDROID." SINTECH (Science and Information Technology) Journal 4, no. 2 (October 28, 2021): 146–54. http://dx.doi.org/10.31598/sintechjournal.v4i2.741.

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Water is a necessity that is so important for every creature in the world, and the estimate of water must always be available or it is in homes, offices, public places or industry. This causes the water storage tank to play an important role in ensuring the availability of air is always there and under control. In this research, it is based on an Android-based Water Pump Monitoring and Control system with the support of IoT (Internet of Things) technology so that it makes it easier for users to monitor the amount of water in the storage tank and control the water pump to fill water into the tank, the system built is supported by the NodeMCU module. esp8266, Relay and Ultrasonic Sensor and connected to the Blynk application which functions as an application interface in monitoring and controlling the water pump. If the air has determined the specified distance, a notification will appear to immediately turn off the water pump, thus it is hoped that this system can help users see the condition of the water pump and water tank even though they are not at home

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Zhang, Hong, and Meigen Cao. "Dynamic vibration absorption design and parameter analysis of oil tank wall of transformer." E3S Web of Conferences 248 (2021): 01069. http://dx.doi.org/10.1051/e3sconf/202124801069.

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Taking a 10kV test transformer as the research object, based on the analysis of transformer vibration and noise vibration sources, the oil tank model of the test transformer is established firstly, and the vibration mode analysis of the oil tank is carried out, and the typical vibration modes of transformer oil tanks with different thicknesses are obtained Then, according to the characteristics of vibration and vibration source of distribution transformer tank wall, the design method and parameter optimization analysis of transformer tank wall vibration absorption are carried out. The analysis shows that the principle of dynamic vibration absorption is clear, and the vibration of the box wall can be effectively controlled with 76% vibration reduction efficiency under the condition of reasonable arrangement of vibration absorption devices and parameter selection. The vibration control effect of vibration absorber increases with the increase of mass ratio between vibration absorber and transformer tank wall. When the mass ratio is determined, the closer the stiffness of vibration absorber is to the optimal stiffness, the better the vibration reduction effect will be.

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40

Chang, Cheng-Yuan, Xiu-Wei Liu, Sen M. Kuo, Department of Electrical Engineering, Chung Y, Department of Electrical Engineering, Chung Y, Department of Electrical Engineering, Chung Y, Department of Electrical Engineering, Chung Y, and Department of Electrical Engineering, Chung Y. "Active noise control for centrifugal and axial fans." Noise Control Engineering Journal 68, no. 6 (November 1, 2020): 490–500. http://dx.doi.org/10.3397/1/376840.

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Fans are widely used in industry for heat dissipation or airflow production. It is achieved by driving a motor of fan to rotate a number of blades. Most industrial fans can be categorized into one of two general types: centrifugal fans and axial fans. However, fan noise is loud when the motor speed is high. This article develops using active noise control (ANC) system to reduce noise from both centrifugal and axial fans. By integrating loudspeakers and microphones, we present multiple-channel feedback ANC structure with the filtered-X least mean square (FXLMS) algorithm to simultaneously reduce noise from the inlet and the outlet of the fans. Several realtime experiments verify that the proposed method and experimental setup not only reduces the narrowband noise but also achieves the global cancellation of the fan noise.

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Akay, Adnan. "Noise Control Engineering Education: Recommendations from the 2019 TQA Workshop." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 2 (August 1, 2021): 4446–49. http://dx.doi.org/10.3397/in-2021-2707.

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This paper summarizes recommendations about noise control engineering education made in a special session on noise control engineering education at NOISE-CON 2019 in San Diego and during an National Academy of Engineering (NAE)-hosted workshop under the auspices of the Technology of Quieter America (TQA) program. Speakers in both the special session and at the workshop represented industry, academe, and government emphasizing the need for more noise control engineers, the expertise required, and the areas in which they are needed. The ensuing discussions, summarized in two published reports, also point to the new technologies that affect noise control engineering education.

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42

Whittaker, J. D., T. Robinson, A. Acharya, D. Singh, and M. Smith. "Noise-induced hearing loss in small-scale metal industry in Nepal." Journal of Laryngology & Otology 128, no. 10 (September 19, 2014): 871–80. http://dx.doi.org/10.1017/s0022215114001728.

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AbstractBackground:There has been no previous research to demonstrate the risk of noise-induced hearing loss in industry in Nepal. Limited research on occupational noise-induced hearing loss has been conducted within small-scale industry worldwide, despite it being a substantial and growing cause of deafness in the developing world.Method:The study involved a cross-sectional audiometric assessment, with questionnaire-based examinations of noise and occupational history, and workplace noise level assessment.Results:A total of 115 metal workers and 123 hotel workers (control subjects) were recruited. Noise-induced hearing loss prevalence was 30.4 per cent in metal workers and 4.1 per cent in hotel workers, with a significant odds ratio of 10.3. Except for age and time in occupation, none of the demographic factors were significant in predicting outcomes in regression analyses. When adjusted for this finding, and previous noise-exposed occupations, the odds ratio was 13.8. Workplace noise was significantly different between the groups, ranging from 65.3 to 84.7 dBA in metal worker sites, and from 51.4 to 68.6 dBA in the control sites.Conclusion:Metal workers appear to have a greater risk of noise-induced hearing loss than controls. Additional research on occupational noise-induced hearing loss in Nepal and small-scale industry globally is needed.

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43

Roy, Peter. "Maritime offshore operations—occupational noise monitoring, assessment and control." APPEA Journal 49, no. 2 (2009): 569. http://dx.doi.org/10.1071/aj08042.

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With increasing emphasis on occupational health as a component of maritime safety case requirements for Australia, the National Offshore Petroleum Safety Authority (NOPSA), in keeping with their goal of improving health and safety outcomes across the industry, has ramped up their expectations on noise management plans (NMP). Now the expectation includes noise risk assessments and evaluation and implementation of feasible engineering noise controls, and NOPSA have added scrutiny of ototoxic substances as well, all of which parallel international trends. NOPSA surveys have found rather poor industry compliance with noise management requirements overall, and have stated that they will continue to promote the issues and will not hesitate to take enforcement action to improve compliance. Occupational noise induced hearing loss (NIHL) is 100% permanent and 100% preventable. Failing to prevent NIHL has significant human, economic, legal and operational impacts. NIHL results in diminished quality of life including isolation and communication problems that affect social interactions. The economic effects of NIHL include lost time and decreased productivity, loss of otherwise qualified and experienced workers through medical disqualification, workers’ compensation costs and disability settlements, retraining costs and expenses related to medical intervention and treatment. Noise-impaired communications affect workplace operational and health and safety performance, and noisy ship and maritime platform accommodations and common areas adversely affect staff comfort, fatigue, morale and general well-being.

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Dumlu, Ahmet, and Kağan Koray Ayten. "A combined control approach for industrial process systems using feed-forward and adaptive action based on second order sliding mode controller design." Transactions of the Institute of Measurement and Control 41, no. 4 (September 18, 2018): 1160–71. http://dx.doi.org/10.1177/0142331218790121.

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This paper presents a new method that uses a feed-forward adaptive second order sliding mode control (FF-ASSMC) for a coupled tank process system that is often used in industry. This proposed method is to combine a feedforward action with adaptive feedback for robust performance of the couple tank system for the first time. The reason for using this feedforward action with the feedback sliding mode control (SMC) is to reduce the effect of the measured disturbance on the coupled tank system. In addition to this, an adaptive second-order SMC proposes to track the desired tank’s level trajectories under disturbances and uncertainties. In order to illustrate the efficiency of the proposed FF-ASSMC method, the simulation and real time experimental studies have been realized. The simulation and experimental outcomes strongly verified that the proposed controller gives a quite successful trajectory tracking response and smaller magnitude overshot under external disturbances.

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45

Handaya, D., P. Bakti, and Y. P. Nugraha. "Design of Process Control System in Water Cooling Processing Interaction Tank using Integral Control and Robust Control in The Tire Industry." IOP Conference Series: Materials Science and Engineering 384 (July 2018): 012016. http://dx.doi.org/10.1088/1757-899x/384/1/012016.

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46

Zinko, R. V., A. P. Kutrakov, S. V. Shybanov, N. M. Zashchepkina, and O. M. Markina. "Active system for reduction of noise parameters of car muffler with the use of pressure sensors based on silicon microcrystals." Archives of Materials Science and Engineering 1, no. 109 (May 1, 2021): 35–41. http://dx.doi.org/10.5604/01.3001.0015.0513.

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Purpose: The article contains the results of research and development of a system for active noise damping of an automobile engine. The proposed system of active noise suppression can significantly reduce the sound pressure level in the frequency band up to 500 Hz. The robotic principle of the developed system is based on the addition of an additional buffer tank with a variable volume in the silencer system. The use of high-temperature sensors with strain gauges based on silicon microcrystals to obtain information on the parameters of sound vibrations arising during the exhaust gas outflow made it possible to create a control system for changing the volume of the buffer tank. The results of testing the proposed system of active noise suppression of an internal combustion engine are presented. Design/methodology/approach: The active noise suppression system based on the Helmholtz resonator used tools to control general noise levels, experimental tests, complex mathematical modelling of acoustic processes in Solidworks, taking into account the conditions of propagation and attenuation of sound energy by intermediate closed volumes. Findings: The use of an additional resonator chamber with variable volume in the exhaust muffler of the internal combustion engine allowed to reduce the resonant phenomena in the zone of low-frequency pulsations of exhaust gas pressure from 57 Hz to 43 Hz at frequency drift in the range of 310… 350 Hz, which significantly improved its noise characteristics. Research limitations/implications: For further research, to improve the characteristics of the active noise suppression system, it is advisable to consider the use of several inadditional cameras of the Helmholtz resonator and to clarify the algorithm of the controller in transient modes of engine operation. Practical implications: The developed design of active noise reduction is simpler in comparison with analogs and allows reducing the noise of exhaust gases in a low-frequency range. Originality/value: To reduce the noise, a variable-volume Helmholtz resonator was used, the efficiency of which is provided by high-temperature sensors of the original design.

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Afshar, P., A. Nobakhti, and H. Wang. "Joint process and quality control of a continuously stirred tank reactor with non-Gaussian process noise." IET Control Theory & Applications 6, no. 5 (2012): 651. http://dx.doi.org/10.1049/iet-cta.2011.0108.

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48

Vinson, Edgar L., Kaitlyn J. Price, J. Raymond Kessler, Elina D. Coneva, Masuzyo Mwanza, and Matthew D. Price. "Tolerance of ‘Camarosa’ Strawberry (Fragaria ×ananassa Duch.) to Extra-label Use of Single and Tank Mix Preemergence Herbicides in Annual Hill Plasticulture." HortScience 56, no. 5 (May 2021): 563–67. http://dx.doi.org/10.21273/hortsci15615-20.

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Relatively few herbicides are registered in Alabama or in the southeastern United States for use in annual hill plasticulture production of strawberries. Acquisition of 24(c) special local needs status for certain herbicides could make more of these chemistries available to the strawberry industry. These herbicides, especially when applied as tank mixes pose potential risks to strawberry plant growth and fruit yield. Special local needs status for these herbicides has been granted for other states, but more evaluation of these products in Alabama soils under plastic mulch is needed. The objective of this study was to assess tank mix applications of preemergence herbicides with different modes of action on plant growth, crop yield, and fruit size of ‘Camarosa’ strawberry. A study was conducted at the Chilton Research and Extension Center in Clanton, AL, in 2018 and 2019. Pendimethalin (3.5 L·ha–1) and S-metolachlor (1.6 L·ha–1) were evaluated for potential phytotoxicity in ‘Camarosa’ strawberry when applied alone or in tank mixes with napropamide (8.6 kg·ha–1), sulfentrazone (0.3 L·ha–1), or terbacil (0.42 L·ha–1) by comparing them to a nontreated control. At 18 weeks after planting, pendimethalin tank mixed with napropamide reduced plant dry weight by 33% compared with the control, but this reduction was not significant. Additionally, tank mixes of pendimethalin with sulfentrazone, napropamide, and terbacil reduced shoot dry weight by 43%, 52%, and 43%, respectively, compared with pendimethalin alone. Pendimethalin + napropamide tank mix reduced relative growth rate by 95% compared with the control between 6 and 18 weeks after planting. All treatments were similar to the control in marketable yield. Differences in plant growth parameters did not appear to affect yield by the end of the experiment. All single applied treatments along with S-metolachlor tank mixed with napropamide and sulfentrazone; pendimethalin tank mixed with sulfentrazone and terbacil appeared to be safe for direct application to strawberry planting beds covered in polyethylene mulch.

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K, Kavitha, and Krishna P.V. "Sustainable growth of Litopenaeus vannamei in intensive raceways of biofloc technology." International Journal of Science, Engineering and Management 9, no. 2 (February 28, 2022): 1–8. http://dx.doi.org/10.36647/ijsem/09.02.a001.

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Shrimp (Litopenaeus vannamei) culture and production at industrial have high value in India with higher export quantity. With the application of scientific research and development methodologies, aquaculture may be expanded to become a larger and more economically relevant industry. Furthermore, due to the high protein content of shrimps, this aquaculture has gained popularity among the general public. Despite all of these positive aspects, shrimp farming is plagued by diseases, which result in increased production losses. This present study provides Biofloc technology to cope with this specific problem which is considered to boost the development and survival of shrimp. This study was conducted in 3 different parts, namely, preparation of the tank, establishing the Raceway system, preparing the flocs in the tank, monitoring water quality, conducting microbiological tests, and managing the feed regularly. The study has found that there is significant growth in the test tanks as compared to the control tank. The test tanks had shown 30% more growth as compared to that of the control tank. The survival rate of shrimp is also significant in test tanks than in the control tank. The other findings, especially the condition of the water, are correlated and discussed at the appropriate place. The study found that Biofloc technology is effective in maintaining water quality, including hardness, minimising shrimp production loss, and enhancing shrimp culture average growth. This technology is the way shrimp culture will go in the future, and it should be applied across the country.

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Ilyas, Muhammad, Syed Ali Raza Shah, Arshad Rauf, Yousaf Khalil, and Muhammad Ayaz. "Stabilization of liquid level in a tank system based on fuzzy logic controller." IAES International Journal of Robotics and Automation (IJRA) 11, no. 4 (December 1, 2022): 315. http://dx.doi.org/10.11591/ijra.v11i4.pp315-323.

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<p>Process industry needed a fast executed automatic control system capable of handling uncertain, vague problems and nonlinear control variables. Liquid level control is one of the emerging control problems getting the interest of technical experts in the area of control. This paper is based on a fuzzy logic control strategy to maintain and stabilize the liquid level in a tank system that deals with pumping of liquid in tanks as well as regulating liquid level and pushing off the liquid into another tank. Fuzzy controller attains optimum performance by eliminating perturbation in steady state and vanishing the overshoot as compared to proportional, integral, and derivative (PID) controller. The proposed fuzzy logic controller shows minimal steady error as compared to PID controller. The defuzzification of the proposed scheme is based on the centroid method to obtain optimum results. The settling time is nearly 50 second while using fuzzy logic control as compared to 80 seconds in PID control strategy. The overshoot observed is minimal, nearly less than 1% using a fuzzy logic control scheme.</p>

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