Статті в журналах: "Reverse load"

1

Abdulla, Irfan, Daniel G. Langohr, Joshua W. Giles, James A. Johnson, and George S. Athwal. "The effect of humeral polyethylene insert constraint on reverse shoulder arthroplasty biomechanics." Shoulder & Elbow 10, no. 1 (April 5, 2017): 25–31. http://dx.doi.org/10.1177/1758573217701065.

Повний текст джерела

Анотація:

Background There is little information on the effects of altering reverse shoulder arthroplasty (RSA) polyethylene constraint on joint load, load angle and deltoid force. The present biomechanical study aimed to investigate the effects of changing RSA polyethylene constraint on joint load, load angle, deltoid force and range of motion. Methods A custom RSA implant capable of measuring forces across the joint with varying polyethylene constraint was tested in six cadaveric shoulders. Standard-, low- and high-constraint (retentive) polyethylene liners were tested, and joint kinematics, loads and muscle forces were recorded. Results When polyethylene constraint was altered, joint load and load angle during active abduction were not affected significantly ( p > 0.19). Additionally, the force required by the deltoid for active abduction was not affected significantly by cup constraint ( p = 0.144). Interestingly, active abduction range of motion was also not affected significantly by changes in cup constraint ( p > 0.45). Conclusions Altering polyethylene cup constraint in RSA to enhance stability does not significantly alter resultant joint loads and deltoid forces. Surprisingly, terminal abduction range of motion was also not significantly different with varying cup constraint, indicating that terminal impingement may be tuberosity related rather than polyethylene.

Стилі APA, Harvard, Vancouver, ISO та ін.

2

KATO, S. "Load Balancing Routing Algorithm for Reverse Proxy Servers." IEICE Transactions on Communications E88-B, no. 9 (September 1, 2005): 3693–700. http://dx.doi.org/10.1093/ietcom/e88-b.9.3693.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Yu, Ming-xin, Lin Wang, Jia-huan Yu, and Nan Yang. "Research on seismic properties of steel reinforced PP ECC column." E3S Web of Conferences 136 (2019): 04052. http://dx.doi.org/10.1051/e3sconf/201913604052.

Повний текст джерела

Анотація:

The mechanical property of steel reinforced PP ECC columns under reverse cyclic load is investigated and results are presented in this paper. The influence of reinforcement ratio, curing age and volume fraction of PP fiber on load bearing capacity, energy dissipation and stiffness degradation is investigated. The results highlighted the positive contribution of PP ECC to enhance strength and energy dissipation capacity which is important to evaluate the performance of structures subjected to reverse cyclic loads. According to the experimental study on mechanical behavior of steel reinforced PP ECC columns under reverse cyclic loading, the formula of model parameters related to reinforcement ratio are proposed，it is founded that the restoring force model established is of a certain degree of adaptability.

Стилі APA, Harvard, Vancouver, ISO та ін.

4

Wei, Zhi Qiang. "Design and Application of Large Torque Electrical Load Simulator." Applied Mechanics and Materials 427-429 (September 2013): 660–63. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.660.

Повний текст джерела

Анотація:

In order to meet the testing requirement of positive and reverse operation large torque load for new rudder, an electrical load simulator is designed. The system mathematical model is established and the feedforward compensation control of torque and rudder angle is adopted to restrain the surplus torque according to the principle of invariance. The high precision large torque load under positive and reverse operation for rudder is realized by torque and position hybrid control. The practical application shows that the proposed method can effectively restrain surplus torque and the system meets the high precision torque load under positive and reverse operation for rudder very well.

Стилі APA, Harvard, Vancouver, ISO та ін.

5

Yorino, N., A. Funahashi, H. Sasaki, and F. D. Galiana. "On reverse control action of on-load tap-changers." International Journal of Electrical Power & Energy Systems 19, no. 8 (November 1997): 541–48. http://dx.doi.org/10.1016/s0142-0615(97)00026-4.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

6

Guo, Zherui, James Zheng, and Weinong Chen. "Reverse ballistics penetration of Kevlar® fabric with different indenters at different loading rates." Textile Research Journal 87, no. 10 (May 16, 2016): 1165–76. http://dx.doi.org/10.1177/0040517516648513.

Повний текст джерела

Анотація:

In this study, the mechanical load on a bullet-shaped indenter when impacted by a single-ply Kevlar fabric was experimentally investigated using a reverse ballistics method at both quasi-static and dynamic rates. Different indenter geometries, namely the 9-mm Luger, .223 Remington, and .308 Winchester bullet geometries, were used. The penetration load of the stationary indenter was measured using a force transducer located behind the indenter, and the penetration load was then plotted against the impact velocity of the fabric sample. Different mechanisms of penetration were observed at different impact velocities. Penetration mechanisms were also found to be highly dependent on projectile nose geometry. A modified method to obtain an approximate ballistic limit based on the impact loads was used to compare the efficacy of different geometry types.

Стилі APA, Harvard, Vancouver, ISO та ін.

7

ChiaHwan, Yaw, and Han JianBo. "The Mechanical Behavior of Fiber Reinforced PP ECC Beams under Reverse Cyclic Loading." Advances in Materials Science and Engineering 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/159790.

Повний текст джерела

Анотація:

When a structure is hit by earthquake, tremendous amount of seismic energy is released and structure is subjected to reverse loads. The mechanical properties of FRP reinforced PP ECC beams and coupon RC beam under reverse cyclic load controlled by displacement are investigated. Curing ages, reinforcement ratio, and volume fraction of PP fiber are parameters under survey. It is shown that multiple saturated cracking occurred in PP ECC beam and no crushing appeared. The PP ECC can enhance strength and energy dissipation capacity which are important to evaluate the performance of structures subjected to reverse cyclic loading.

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Tho, K. K., S. Swaddiwudhipong, Z. S. Liu, K. Zeng, and J. Hua. "Uniqueness of reverse analysis from conical indentation tests." Journal of Materials Research 19, no. 8 (August 2004): 2498–502. http://dx.doi.org/10.1557/jmr.2004.0306.

Повний текст джерела

Анотація:

The curvature of the loading curve, the initial slope of the unloading curve, and the ratio of the residual depth to maximum indentation depth are three main quantitiesthat can be established from an indentation load-displacement curve. A relationship among these three quantities was analytically derived. This relationship is valid for elasto-plastic material with power law strain hardening and indented by conical indenters of any geometry. The validity of this relationship is numerically verified through large strain, large deformation finite element analyses. The existence of an intrinsic relationship among the three quantities implies that only two independent quantities can be obtained from the load-displacement curve of a single conical indenter. The reverse analysis of a single load-displacement curve will yield non-unique combinations of elasto-plastic material properties due to the availability of only two independent quantities to solve for the three unknown material properties.

Стилі APA, Harvard, Vancouver, ISO та ін.

9

Wei, Jiufu, Zhenxiao Li, and Baoming Li. "Investigation of Reverse Recovery Current of High-Power Thyristor in Pulsed Power Supply." Electronics 9, no. 8 (August 12, 2020): 1292. http://dx.doi.org/10.3390/electronics9081292.

Повний текст джерела

Анотація:

The instantaneous overvoltages from the load side can cause damages of high-power thyristors in conventional pulsed power supply topologies, especially in cases of numerous pulse-forming units that operate together with discharge time intervals. The instantaneous overvoltages from the load side, which leads to high reverse recovery currents in high-power thyristors, can be induced by load mutations in the electromagnetic launching field. This paper establishes circuit models of PPS topologies, and investigates effects of the initial voltage of the energy-storage capacitor, the discharge time intervals, and the load resistance on the reverse recovery currents in high-power thyristors. To overcome the shortcomings of conventional PPS topologies, an improved PPS topology is developed. The improved PPS topology applies coupling inductor and resistance-capacitance snubber techniques, which can absorb the surge energy from the load side and reduce the reverse recovery currents in high-power thyristors. The simulation technique has been applied to validate theoretical analysis and the proposed model.

Стилі APA, Harvard, Vancouver, ISO та ін.

10

Bognar, K., R. Pohl, and F. Behrendt. "Seawater reverse osmosis (SWRO) as deferrable load in micro grids." Desalination and Water Treatment 51, no. 4-6 (January 2013): 1190–99. http://dx.doi.org/10.1080/19443994.2012.715093.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

11

Liu, Jian Bao, Le Ping Bu, and Xin Xin Qin. "Study on Reverse Charging of Stored Energy Capacitor in Pulsed Power Supply System." Applied Mechanics and Materials 556-562 (May 2014): 2008–12. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.2008.

Повний текст джерела

Анотація:

When main discharge switch is put in discharging course of pulsed power supply in stored energy capacitor branch, the stored energy capacitor may have reverse charging phenomenon. Because of unilateral conductivity of the main discharge switch, the reverse voltage cannot be released and this would adversely affect service life of the stored energy capacitor and reduce working efficiency of the pulsed power supply. Through detailed deducing the discharging course of stored energy capacitor in pulsed power supply system, this paper analyzed relative factors affecting reverse charging voltage of stored energy capacitor and discussed necessary means that could reduce reverse charging voltage of stored energy capacitor. Based on this, a circuit structure with the main discharge switch in load branch is proposed and release of reverse charging voltage of stored energy capacitor is realized without affecting discharge current characteristics of the load. Simulation and test results show that the load current characteristics of the pulsed power supply after adjusting location of the discharge switch is basically the same as before the adjustment is made and completely meet requirement of electromagnetic emission. As a result, timely release of the reverse voltage extended working life of the stored energy capacitor and also improved efficiency of the electromagnetic emission system.

Стилі APA, Harvard, Vancouver, ISO та ін.

12

Colangeli, Sergio, Walter Ciccognani, Patrick Ettore Longhi, Lorenzo Pace, Antonio Serino, Julien Poulain, Rémy Leblanc, and Ernesto Limiti. "Source/Load-Pull Noise Measurements at Ka Band." Energies 14, no. 18 (September 7, 2021): 5615. http://dx.doi.org/10.3390/en14185615.

Повний текст джерела

Анотація:

This paper is focused on the extraction of the noise parameters of a linear active device by exploiting both forward and reverse noise power measurements associated with different terminations. In order for load-pull measurements to yield a significant marginal improvement (as compared to forward measurements only) it is expected that the device under test should appreciably deviate from unidirectionality. For this reason, the source/load-pull technique is applied to frequencies at which the considered devices are still usable but their reverse noise factor exhibits a measurable dependence on the output terminations. Details on the test bench set up to the purpose, covering the 20–40 GHz frequency range, are provided. A characterization campaign on a 60 nm gate length, 4×35 µm GaN-on-Si HEMT fabricated by OMMIC is illustrated.

Стилі APA, Harvard, Vancouver, ISO та ін.

13

van Rooijen, Lisette B., Vicki Greengrass, Lisa M. Morris, Megan M. Plate, Maelenn Gouillou, Gilda Tachedjian, Nicolas Sluis-Cremer, Anna C. Hearps, and Suzanne M. Crowe. "Effect of Reverse Transcriptase Inhibitors and Mutations on the Low-Cost Cavidi Reverse Transcriptase Viral Load Assay." JAIDS Journal of Acquired Immune Deficiency Syndromes 52, no. 4 (December 2009): 527–29. http://dx.doi.org/10.1097/qai.0b013e3181b9e726.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

14

Petrík, Jozef, and Pavol Palfy. "The Influence of the Load on the Hardness." Metrology and Measurement Systems 18, no. 2 (January 1, 2011): 223–34. http://dx.doi.org/10.2478/v10178-011-0005-5.

Повний текст джерела

Анотація:

The Influence of the Load on the HardnessThe objective of the submitted paper is to analyze the influence of the load on the calibration of micro-hardness and hardness testers. The results were validated by Measurement Systems Analysis (MSA), Analysis of Variance (ANOVA) and Z-score. The relationship between the load and micro-hardness in calibration of micro-hardness testers cannot be explained by Kick's Law (Meyer's index "n" is different from 2). The conditions of Kick's Law are satisfied at macro-hardness calibration, the values of "n" are close to 2, regardless of the applied load. The apparent micro-hardness increases with the increase of the load up to 30 g; the reverse indentation size effect (ISE) behavior is typical for this interval of the loads. The influence of the load on the measured micro-hardness is statistically significant for majority of calibrations.

Стилі APA, Harvard, Vancouver, ISO та ін.

15

Washbourne, Kelly. "Load-managed problem formats." Target. International Journal of Translation Studies 24, no. 2 (December 31, 2012): 338–54. http://dx.doi.org/10.1075/target.24.2.06was.

Повний текст джерела

Анотація:

Does the “expert blind spot”, our “unconscious competence”, lead us to undermine the effectiveness of our translation assignments? This study characterizes the translation task as schema-based, and thus prone to cognitive overload for the learner. Accordingly, schema acquisition tasks featuring reduced-goal specificity and goal-free problems for training the novice are reviewed. The argument is put forward that we need 1) to use more scaffolding to reduce cognitive load, 2) to vary task architecture for learning (including the use of planning pre-tasks), and 3) to provide diagnostic help for the student translator to attain context-independence for ‘high road transfer’. Formats for expertise modeling are considered—reverse tasks, completion examples, and other whole-task models—as instructional designs for load-managed translation tasks that improve problemsolving, schema acquisition, process-orientation, and metacognitive monitoring.

Стилі APA, Harvard, Vancouver, ISO та ін.

16

Waghmare, Alpana, Bonnie Strelitz, Kirsten Lacombe, Garrett Perchetti, Arun Nalla, Brian Rha, Claire Midgley, et al. "2626. Rhinovirus in Children Presenting to the Emergency Department: Role of Viral Load in Disease Severity and Co-Infections." Open Forum Infectious Diseases 6, Supplement_2 (October 2019): S915—S916. http://dx.doi.org/10.1093/ofid/ofz360.2304.

Повний текст джерела

Анотація:

Abstract Background Rhinovirus (RV) quantitation by reverse transcription-quantitative PCR is limited by variable amplification efficiency across genotypes. We used a precise viral quantitation method, reverse transcription-digital PCR (RT-dPCR), to characterize the role of viral load in clinical outcomes and in viral co-infections in children presenting to a tertiary hospital emergency department (ED). Methods Children < 18 years with respiratory symptoms for ≤ 14 days were enrolled from December 1, 2016 to December 31, 2018. Participants had nasal and throat specimens obtained and multiplex PCR testing with a commercial assay (FilmArray; bioMerieux). RV positive samples were quantified using RT-dPCR. Samples with sufficient viral load were sequenced at a 543 bp fragment of the RV VP4/VP2 region. RV species were assigned by comparison to RV sequences in GenBank using BLAST. Clinical data were collected into REDCap. T-tests were used to compare mean viral loads between groups. Results Of 1703 children enrolled in the ED, 697 were RV/enterovirus positive by FilmArray [median age 18 months (interquartile range 9–39 months)]. Of 590 subjects with viral load available, 276 (47%) were admitted to the hospital. Among RV mono-infections (N = 434), mean viral load did not differ between subjects admitted vs. discharged from the ED (7.03 log copies/mL for both, P = 0.97). Among admitted subjects with RV mono-infection, viral load also did not differ between subjects requiring supplemental oxygen vs. not (7.01 vs. 7.10 log copies/mL, P = 0.6). Subjects with viral co-infections had lower mean RV viral loads (6.31 log copies/mL) compared with those with RV only (7.03 log copies/mL; P < 0.001) (figure). Significantly different RV viral loads were seen with co-infections with respiratory syncytial virus (RSV), metapneumovirus (MPV) and parainfluenza (PIV), but not with influenza, adenovirus or coronavirus. In 525 sequenced samples (46% RV-A, 4% RV-B, 50% RV-C), viral load did not vary between RV viral species (P = 0.09). Conclusion Precise viral quantitation demonstrates children co-infected with RV and RSV, MPV or PIV have lower nasal viral loads than those with RV alone. Among RV mono-infections, RV viral load was not associated with admission or need for supplemental oxygen. Disclosures All authors: No reported disclosures.

Стилі APA, Harvard, Vancouver, ISO та ін.

17

Kensara, Muwaffaq, Adel M. Abdel Dayem, and Abdelaziz Nasr. "Reverse Osmosis Desalination Plant Driven by Solar Photovoltaic System–Case Study." International Journal of Heat and Technology 39, no. 4 (August 31, 2021): 1153–63. http://dx.doi.org/10.18280/ijht.390413.

Повний текст джерела

Анотація:

A case study of designing of a reverse osmosis (RO) desalination plant using a Solar Photovoltaic (PV) system is investigated in this work. The RO system is a desalination plant providing pure water to the Shoiaba power generation plant. The system consists of a PV array connected to an inverter for day time or batteries for night time. The PV is designed to meet the high-pressure pumps’ load that is about 13649 kWh a day. Because the plant is operated 24 hours a day the PV panels are divided into two parts, one to cover the day time load and the second to cover night load that is stored in batteries. Based on weather conditions of solar radiation of the shortest day and maximum ambient temperature the PV is sizing and a storage system is determined. The system is modeled by the TNSYS software to simulate the performance of the system during the year. The annual performance of system proves that the system is able to meet the required load during the year. It can be concluded that it is a great opportunity to install photovoltaic panels and increase the efficiency of Reverse Osmosis Desalination Plant.

Стилі APA, Harvard, Vancouver, ISO та ін.

18

Gemmen, Randall S. "Reverse Fuel Cell Operation on Load Change: Model and Experimental Study." ECS Proceedings Volumes 2005-07, no. 1 (January 2005): 856–64. http://dx.doi.org/10.1149/200507.0856pv.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

19

Atia, Adam A., and Vasilis Fthenakis. "Active-salinity-control reverse osmosis desalination as a flexible load resource." Desalination 468 (October 2019): 114062. http://dx.doi.org/10.1016/j.desal.2019.07.002.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

20

Mojumder, Soumyajit, Hang Su, Cong Qiu, Peter Mutton, Aparna Singh, and Wenyi Yan. "The role of bending stress on the initiation of reverse transverse defects." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 235, no. 1 (February 10, 2020): 61–72. http://dx.doi.org/10.1177/0954409720904329.

Повний текст джерела

Анотація:

This paper investigated the role of longitudinal reverse bending stress on the initiation of reverse transverse defects. The longitudinal reverse bending stress occurs due to the reverse bending of the rail between two-wheel passage leading to the generation of tensile bending stress at the railhead and the lower head areas. The longitudinal bending stress was investigated as part of a parametric study on the rail cant angle, rail stiffness, lateral-to-vertical load ratio, and rail profile. A finite element model was created by using ABAQUS to analyze the extent of reverse bending in rails with respect to the chosen set of parameters. Under different lateral-to-vertical load ratios of 0, 0.3, 0.5, and 0.7, the maximum stress at the rail lower gauge corner was found to vary between 14.57MPa and 15.47MPa under the reverse bending condition. Similarly, low values of tensile stress under the reverse bending scenario were observed with changes in the rail cant angle and axle spacing with respect to different coal and iron ore wagons. The results revealed that the magnitude of the bending stress under different conditions of reverse bending was not significant enough to initiate a crack at the lower gauge corner.

Стилі APA, Harvard, Vancouver, ISO та ін.

21

Sadiq, Taoheed O., Taiwo G. Fadara, Peter O. Aiyedun, and Jamaliah Idris. "Numerical Estimation of Rolling Load and Torque for Hot Flat Rolling of HCSS316 at Low Strain Rates Based on Mean Temperature." International Journal of Engineering Research in Africa 26 (October 2016): 11–29. http://dx.doi.org/10.4028/www.scientific.net/jera.26.11.

Повний текст джерела

Анотація:

Numerical estimation of rolling load and torque often showed large discrepancies when compared with experimental values. This was attributed to difficulty in estimating the mean rolling temperature from the available data. This work is thus directed at obtaining a good estimate for the mean rolling temperature which can effectively be used for load and torque estimates. Hot flat rolling stimulation by use of the Bland and Ford’s cold rolling (HRBF) theory confirmed the reverse sandwich effect in selected carbon steels at low strain rates. In this work, the effect of pass reduction on rolling temperature distribution, yield stress and rolling load were studied for AISI Type 316 stainless steel (HSCSS316). For this new simulation, at low and high strain rates, results showed that the ratio of experimental to calculated rolling load and torque were higher at lower reduction than at higher reduction. These results confirmed excess load and torque in the hot rolling of HSCSS316 low reductions. The results obtained from Hot Rolling Bland and Ford’s Theory based on Root Mean Square rolling temperature were in good agreement with values obtained using Reverse Sandwich Model and the Reverse Sandwich- Hot Rolling Bland and Ford’s Program under the same rolling conditions.

Стилі APA, Harvard, Vancouver, ISO та ін.

22

Yu, Tao, Quansheng Sun, Chunwei Li, and Yancheng Liu. "Experimental Research on the Flexural Performance of RC Rectangular Beams Strengthened by Reverse-Arch Method." Symmetry 13, no. 9 (September 9, 2021): 1666. http://dx.doi.org/10.3390/sym13091666.

Повний текст джерела

Анотація:

Carbon fiber-reinforced polymer (CFRP) reinforcement technology has been widely used in the reinforcement of reinforced concrete (RC) beams. At this stage, high prestressed CFRP board reinforcement is often used in actual reinforcement. However, most reinforced bridges are designed for a long time, and the design value of the protective layer is low, and it is impossible to achieve a large prestressed tension. Therefore, this paper proposes the reverse-arch method to paste the CFRP board and apply low prestress to strengthen the symmetrical RC beam. Through the three-point forward loading test, the cracking load, ultimate load, crack width, mid-span deflection, strain and failure mode of a reverse-arch method-pasted CFRP board-reinforced beam, a directly pasted CFRP board-reinforced beam and an unreinforced beam are compared. The results show that the load-bearing capacity and stiffness of the test beam can be improved by pasting CFRP plates with anti-arch method, but the ductility of the test beam is reduced. Compared with the unreinforced beam, the maximum cracking load and ultimate load are increased by 56% and 63% respectively. The reverse-arch method can produce low prestress, improve the stiffness and bearing capacity of members, and has a good prospect of engineering application.

Стилі APA, Harvard, Vancouver, ISO та ін.

23

Kim, Yong Suk, Seung Duk Kim, and Sung Joon Kim. "Dry Sliding Wear Mechanisms of the High Nitrogen Austenitic 18Cr-18Mn-2Mo-0.9N Steel at Different Applied Loads." Advanced Materials Research 26-28 (October 2007): 37–40. http://dx.doi.org/10.4028/www.scientific.net/amr.26-28.37.

Повний текст джерела

Анотація:

Sliding wear mechanisms of the solution treated 18Cr-18Mn-2Mo-0.9N high nitrogen steel (HNS) were studied. Room-temperature dry sliding wear tests of the steel were carried out at various applied loads to explore the mechanism as a function of the load. The wear rate of the steel increased with the increase of the load; however, the increase rate was not constant. The rate increased slowly at low loads, rapidly at intermediate loads, and finally, the increase-rate became low again at high loads. Worn surfaces, their cross sections, and wear debris were examined, and phases of the heat-treated HNS as well as the wear debris were identified to find out the mechanism. The wear of the steel was found to be controlled by the tribo-oxidation, strain-induced phase transformation, and reverse transformation due to temperature rise on a wearing surface. The influence of each mechanism on the rate varied depending on the magnitude of the applied load.

Стилі APA, Harvard, Vancouver, ISO та ін.

24

Alamu, O. J., P. O. Aiyedun, and Nurudeen O. Adekunle. "Effect of Pass Reduction on Rolling Parameters Using Reverse Sandwich Model Integrated into the Hot Rolling Bland and Ford’s Theory." Advanced Materials Research 62-64 (February 2009): 385–92. http://dx.doi.org/10.4028/www.scientific.net/amr.62-64.385.

Повний текст джерела

Анотація:

Hot flat rolling simulation by use of the Bland and Ford’s cold rolling (HRBF) theory confirmed the reverse sandwich effect in selected carbon steels at low strain rates. The Reverse Sandwich Model (RSM) was subsequently integrated into the HRBF theory for load and torque estimation. In this work, the effect of pass reduction on rolling temperature distribution, yield stresses and rolling load were studied for AISI Type 316 stainless steel (HCSS316). For this new simulation, at low and high strain rates, results showed that the ratio of experimental to calculated roll load and torque were higher at lower reduction than at higher reduction. These results confirmed excess load and torque in the hot rolling of HCSS316 at low reductions. This is in agreement with results obtained using Sim’s theory, HRBF theory and the RSM.

Стилі APA, Harvard, Vancouver, ISO та ін.

25

Petrík, J. "On the Load Dependence of Micro-Hardness Measurements: Analysis of Data by Different Models and Evaluation of Measurement Errors." Archives of Metallurgy and Materials 61, no. 4 (December 1, 2016): 1819–24. http://dx.doi.org/10.1515/amm-2016-0294.

Повний текст джерела

Анотація:

AbstractThe influence of applied loads between 0.09807 N and 0.9807 N on measured values of micro-hardness was evaluated by Meyer’s index n, proportional specimen resistance model (PSR) and Hays – Kendall methods, Total Dispersion Zone and Analysis of Variance (ANOVA). The measurement was repeated 6 times using the same hardness reference block with standard hardness Hc= 327 HV0.05 as a sample. The influence of the load on the measured value of micro-hardness is statistically significant, and the relationship between applied load and micro-hardness manifests reverse indentation size effect (ISE) for most of “measurements”. The high value of the uncertainty of results can affect the existence and nature of ISE, especially at low loads.

Стилі APA, Harvard, Vancouver, ISO та ін.

26

Lu, Renfei, Jian Wang, Min Li, Jing He, Yaqi Wang, Jia Dong, and Weihua Cai. "Retrospective quantitative detection of SARS-CoV-2 by digital PCR showing high accuracy for low viral load specimens." Journal of Infection in Developing Countries 16, no. 01 (January 31, 2022): 10–15. http://dx.doi.org/10.3855/jidc.15315.

Повний текст джерела

Анотація:

Introduction: Accurate detection of severe acute respiratory syndrome coronavirus 2 is critical for diagnosis and disease status evaluation of Coronavirus disease 2019. We retrospectively evaluated the infection status and viral load of severe acute respiratory syndrome coronavirus 2 in Nantong city, China, using a quantitative digital polymerase chain reaction and reverse-transcription PCR. Methodology: A total of 103 clinical specimens from 31 patients were collected and tested by digital PCR and reverse-transcription PCR. Results: The overall accuracy of digital PCR was 96.8%, which was higher than the overall accuracy of 87.1% for reverse-transcription PCR. 4 (3.88%) specimens for ORF1ab and 22 (21.36%) specimens for N gene were negative by reverse-transcription PCR but positive by digital PCR. 3 (2.91%, 3/103) specimens of ORF1ab were positive by reverse-transcription PCR but negative by digital PCR. The digital PCR assay exhibited higher sensitivity to measure the N gene than the ORF1ab gene (p < 0.01). Conclusions: Our results showed that digital PCR assay provides more reliable detection of Coronavirus disease 2019 than reverse-transcription PCR, especially for low viral load specimens.

Стилі APA, Harvard, Vancouver, ISO та ін.

27

Du, Shangyu, Guofa Wang, Yajun Xu, Ying Ma, Desheng Zhang, Qiang Ma, and Xingtong Yue. "Welding Deformation of Hydraulic Support Measurements by Using FBG Sensors." Advances in Civil Engineering 2021 (August 4, 2021): 1–10. http://dx.doi.org/10.1155/2021/5405597.

Повний текст джерела

Анотація:

The welding deformation and cracking of hydraulic support have always been an important issue that impacts product quality and performance in the industry. In order to quantify the deformation of the welding seam of the reverse four-bar linkage hydraulic support under loading conditions, a real-time weld monitoring system based on sensitive fiber Bragg grating sensors is designed. The strength test and the cycle life test of the top coal caving reverse four-link support with four typical eccentric loads were conducted, respectively. The strength test results prove that the fiber Bragg grating sensor is accurate enough to measure welding deformation of hydraulic support; the measurement resolution reaches 0.1 μm. The eccentric load experiment produces the reverse four-bar torsion, especially when the top beam is at a low position; the maximum deformation of the weld is 100 μm. In the cycle test, a phenomenon has been captured, i.e., the welds present a baseline shift along with the cyclic load and even jump. It indicates that the hydraulic support changes from one stable state to another stable state. This work not only provides a feasible solution for welding deformation monitoring but also provides a possibility for the whole life cycle monitoring of hydraulic supports.

Стилі APA, Harvard, Vancouver, ISO та ін.

28

Chuchuen, Yanapat, Kritwara Rattanaopas, and Sarapee Chunkaew. "Quality of Service on Link Aggregation Network Virtualization for Docker Containers." Applied Mechanics and Materials 886 (January 2019): 227–32. http://dx.doi.org/10.4028/www.scientific.net/amm.886.227.

Повний текст джерела

Анотація:

Docker engine is an extremely powerful tool for PaaS platform of cloud computing. It gives benefits for large-scale of internet services. Web service is basic service for everyone who requires to access internet that web infrastructure must has scalability with load-balance web server called reverse proxy. The key answers for a large-scale web must have multiple web servers working together with high speed bandwidth. Moreover, multiple clusters can find in the same data center there are required to assign priority and quality of each cluster service. We investigate load-balance assign link aggregation with network QoS by using pipework script and traffic control tool in frontend reverse proxy server on each cluster. Our research evaluates scenario of network QoS ratios which include 50/50, 60/40, 70/30 and 80/20. We compare network bandwidth between both web reverse proxy clusters. The results present our designed and implementation tool not only can control network QoS on each web reverse proxy cluster in all load-balance link aggregation modes which include round-robin, XOR and ALB but also those of clusters can access multiple network interface. In experiment, average network bandwidths in all QoS cases are around 200 MB per second for link aggregation of 2 gigabit interface.

Стилі APA, Harvard, Vancouver, ISO та ін.

29

Bicknell, Ryan, Michael Furlan, Alexander Bertelsen, and Frederick Matsen. "Factors Affecting Stability of the Reverse Total Shoulder Arthroplasty: A Cadaveric Biomechanical Study." Open Orthopaedics Journal 14, no. 1 (December 3, 2020): 154–60. http://dx.doi.org/10.2174/1874325002014010154.

Повний текст джерела

Анотація:

Background: The overall objective of this study was to investigate whether a reverse shoulder arthroplasty could provide adequate stability to a shoulder even with extreme soft tissue loss. The specific objectives of this study were: to determine if just the deltoid, conjoined tendon, and triceps are sufficient soft tissues to allow a Reverse Shoulder Arthroplasty (RSA) to provide shoulder stability and to determine the influence of load direction, rotation, shoulder position, and polyethylene thickness on RSA stability in this soft-tissue deficient model. Methods: This study utilized six cadaveric shoulders that had all soft tissue removed, with the exception of the deltoid, conjoint tendon, and long head of triceps. A reverse shoulder arthroplasty was then performed (Delta III, DePuy Inc., Warsaw, IN) and an increasing dislocation force was applied perpendicular to the humeral socket centerline until dislocation occurred, or a maximum load of 100 N was reached. This was repeated to measure the effect of four factors: load direction, arm position, polyethylene thickness, and arm rotation on force to dislocation. Results: For load direction, there was an increase in force to dislocate an inferior load direction (p=0.01). There was a lower not dislocated percentage and lower survival for a posterior load direction (p=0.02). For arm position, there was a decrease in force for dislocation and lower survival for both abduction and extension arm positions. There was a higher not dislocated percentage for a flexion arm position (p=0.01). For arm rotation, there was a lower not dislocated percentage and lower survival for an external rotation arm position (p=0.03). There was no statistically significant influence of polyethylene thickness (p=0.26). Conclusion: The deltoid, conjoined tendon, and triceps are sufficient to stabilize an RSA. Load direction, arm position, and arm rotation were all shown to significantly affect stability. Finally, polyethylene thickness may not affect overall RSA stability in this soft-tissue deficient model. Level of Evidence: Basic science study, Biomechanical study.

Стилі APA, Harvard, Vancouver, ISO та ін.

30

Wu, Jieqiong, Jian Zhang, Bo Diao, Shaohong Cheng, and Yinghua Ye. "Hysteretic Behavior of Eccentrically Loaded Reinforced Air-Entrained Concrete Columns under Combined Effects of Freeze-Thaw Cycles and Seawater Corrosion." Advances in Civil Engineering 2018 (July 19, 2018): 1–10. http://dx.doi.org/10.1155/2018/3931791.

Повний текст джерела

Анотація:

Besides service loads, reinforced concrete structures in cold coastal seismic regions are subjected to multiple attacks of freeze-thaw cycles and seawater corrosion as well as the earthquake struck. An experimental study was conducted to investigate the seismic response of eccentrically loaded reinforced air-entrained concrete columns under alternative actions of freeze-thaw cycles and chloride corrosion. Results show that, after 300 times of freeze-thaw cycles alternated with 100 times of seawater immersion, the hysteretic behavior of the eccentrically loaded columns manifested an apparent asymmetric pattern. Under forward cyclic load, the existence of larger eccentric load rendered the reduction of the ultimate load and the ductility of a column by up to 20.3% and 46.05%, respectively, but it had a positive effect if reverse cyclic load was applied. The presence of eccentric load could have a considerable impact on the seismic behavior of reinforced air-entrained concrete columns served in an aggressive environment.

Стилі APA, Harvard, Vancouver, ISO та ін.

31

Zolotov, A. S., S. Kh Isokov, and A. Kh Isokova. "The Optimal Surgical Needle for Tendon Suture: Cutting Edge or Reverse Cutting Edge?" Traumatology and Orthopedics of Russia 27, no. 2 (July 13, 2021): 75–80. http://dx.doi.org/10.21823/2311-2905-2021-27-2-75-80.

Повний текст джерела

Анотація:

Background. Achieving a durable connection between the lacerated tendon ends is difficult. The outcome of treatment depends on many factors. Several authors consider the properties of the surgical needle used for suturing the tendon to be important. The aim of the study— to compare the strength of the tendon suture applied with the conventional cutting edge and reverse cutting edge surgical needles in the experiment.Materials and Methods.We used porcine tendons for the experiment. The tendon fragments were divided into 2 groups of 20 tendons each. On all 40 tendons, the same type of “injury” of the tendon was simulated — using a scalpel. In the first group, the interrupted suture of the tendon was applied with a cutting edge surgical needle, in the second group — reverse cutting edge. Laboratory tests of the tendon sutures strength were performed on the improvised stand.Results.In the first (suture made with a cutting needle edge), diastasis of 2 mm was determined at an average load of 1219.5 g (m = ±76.56, where «m» is the representativeness error). Complete suture failure occurred at an average load of 1770.8 g (m = ±100.02). In this group, the thread rupture was not recorded. In the second group (a suture made with a reverse cutting edge needle), diastasis occurs with an average load of 1754.75 g (m = ±77.32). Complete suture failure occurred at an average load of 2571.25 (at m= ± 103.78). In three cases, the thread ruptured. In the second group (reverse cutting edge needle), the tendon suture strength was statistically significantly higher than in the first group. Conclusion. The tendon suture strength depends on the surgical needle properties. In tendons reconstruction the reverse cutting edge needle use is more preferable compared to the conventional cutting edge needle use.

Стилі APA, Harvard, Vancouver, ISO та ін.

32

Xue, Xiaofeng, Xuefeng Chen, Xingwu Zhang, Baijie Qiao, and Jia Geng. "Hermitian Mindlin Plate Wavelet Finite Element Method for Load Identification." Shock and Vibration 2016 (2016): 1–24. http://dx.doi.org/10.1155/2016/8618202.

Повний текст джерела

Анотація:

A new Hermitian Mindlin plate wavelet element is proposed. The two-dimensional Hermitian cubic spline interpolation wavelet is substituted into finite element functions to construct frequency response function (FRF). It uses a system’s FRF and response spectrums to calculate load spectrums and then derives loads in the time domain via the inverse fast Fourier transform. By simulating different excitation cases, Hermitian cubic spline wavelets on the interval (HCSWI) finite elements are used to reverse load identification in the Mindlin plate. The singular value decomposition (SVD) method is adopted to solve the ill-posed inverse problem. Compared with ANSYS results, HCSWI Mindlin plate element can accurately identify the applied load. Numerical results show that the algorithm of HCSWI Mindlin plate element is effective. The accuracy of HCSWI can be verified by comparing the FRF of HCSWI and ANSYS elements with the experiment data. The experiment proves that the load identification of HCSWI Mindlin plate is effective and precise by using the FRF and response spectrums to calculate the loads.

Стилі APA, Harvard, Vancouver, ISO та ін.

33

Cai, Changchun, Yuan Tao, Tianqi Zhu, and Zhixiang Deng. "Short-Term Load Forecasting Based on Deep Learning Bidirectional LSTM Neural Network." Applied Sciences 11, no. 17 (September 1, 2021): 8129. http://dx.doi.org/10.3390/app11178129.

Повний текст джерела

Анотація:

Accurate load forecasting guarantees the stable and economic operation of power systems. With the increasing integration of distributed generations and electrical vehicles, the variability and randomness characteristics of individual loads and the distributed generation has increased the complexity of power loads in power systems. Hence, accurate and robust load forecasting results are becoming increasingly important in modern power systems. The paper presents a multi-layer stacked bidirectional long short-term memory (LSTM)-based short-term load forecasting framework; the method includes neural network architecture, model training, and bootstrapping. In the proposed method, reverse computing is combined with forward computing, and a feedback calculation mechanism is designed to solve the coupling of before and after time-series information of the power load. In order to improve the convergence of the algorithm, deep learning training is introduced to mine the correlation between historical loads, and the multi-layer stacked style of the network is established to manage the power load information. Finally, actual data are applied to test the proposed method, and a comparison of the results of the proposed method with different methods shows that the proposed method can extract dynamic features from the data as well as make accurate predictions, and the availability of the proposed method is verified with real operational data.

Стилі APA, Harvard, Vancouver, ISO та ін.

34

Satlin, Michael J., Jason Zucker, Benjamin R. Baer, Mangala Rajan, Nathaniel Hupert, Luis M. Schang, Laura C. Pinheiro, et al. "Changes in SARS-CoV-2 viral load and mortality during the initial wave of the pandemic in New York City." PLOS ONE 16, no. 11 (November 19, 2021): e0257979. http://dx.doi.org/10.1371/journal.pone.0257979.

Повний текст джерела

Анотація:

Public health interventions such as social distancing and mask wearing decrease the incidence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, but it is unclear whether they decrease the viral load of infected patients and whether changes in viral load impact mortality from coronavirus disease 2019 (COVID-19). We evaluated 6923 patients with COVID-19 at six New York City hospitals from March 15-May 14, 2020, corresponding with the implementation of public health interventions in March. We assessed changes in cycle threshold (CT) values from reverse transcription-polymerase chain reaction tests and in-hospital mortality and modeled the impact of viral load on mortality. Mean CT values increased between March and May, with the proportion of patients with high viral load decreasing from 47.7% to 7.8%. In-hospital mortality increased from 14.9% in March to 28.4% in early April, and then decreased to 8.7% by May. Patients with high viral loads had increased mortality compared to those with low viral loads (adjusted odds ratio 2.34). If viral load had not declined, an estimated 69 additional deaths would have occurred (5.8% higher mortality). SARS-CoV-2 viral load steadily declined among hospitalized patients in the setting of public health interventions, and this correlated with decreases in mortality.

Стилі APA, Harvard, Vancouver, ISO та ін.

35

Nigro, Phillip T., Sergio Gutiérrez, and Mark A. Frankle. "Improving glenoid-side load sharing in a virtual reverse shoulder arthroplasty model." Journal of Shoulder and Elbow Surgery 22, no. 7 (July 2013): 954–62. http://dx.doi.org/10.1016/j.jse.2012.10.025.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

36

&NA;. "The nucleoside reverse transcriptase inhibitor DPC 817* markedly reduced HIV viral load." Inpharma Weekly &NA;, no. 1425 (February 2004): 7. http://dx.doi.org/10.2165/00128413-200414250-00021.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

37

Corrigan, Gary E., Eva Olausson Hansson, Andreas Mörner, Neil Berry, Clas F. R. Källander, and Rigmor Thorstensson. "Reverse Transcriptase Viral Load Correlates with RNA in SIV/SHIV-Infected Macaques." AIDS Research and Human Retroviruses 22, no. 9 (September 2006): 917–23. http://dx.doi.org/10.1089/aid.2006.22.917.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

38

Ohtsuki, H., A. Yokoyama, and Y. Sekine. "Reverse action of on-load tap changer in association with voltage collapse." IEEE Power Engineering Review 11, no. 2 (February 1991): 66. http://dx.doi.org/10.1109/mper.1991.88747.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

39

Hanham, Jose, Wayne Leahy, and John Sweller. "Cognitive Load Theory, Element Interactivity, and the Testing and Reverse Testing Effects." Applied Cognitive Psychology 31, no. 3 (April 24, 2017): 265–80. http://dx.doi.org/10.1002/acp.3324.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

40

Ohtsuki, H., A. Yokoyama, and Y. Sekine. "Reverse action of on-load tap changer in association with voltage collapse." IEEE Transactions on Power Systems 6, no. 1 (1991): 300–306. http://dx.doi.org/10.1109/59.131076.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

41

Kam, Chester Chun Seng, John P. Meyer, and Shaojing Sun. "Why Do People Agree With Both Regular and Reversed Items? A Logical Response Perspective." Assessment 28, no. 4 (March 29, 2021): 1110–24. http://dx.doi.org/10.1177/10731911211001931.

Повний текст джерела

Анотація:

The current research challenges the received view that misresponses to reversed items are the result of participants’ irrational behavior. On the contrary, for participants at a midpoint level of a trait, it is perfectly logical to agree and disagree with seemingly equivalent statements (e.g., I’m not tall, but neither am I short). For this reason, regular and reversed items for a unidimensional construct were predicted to load on separate factors. Two types of reversed items—polar opposites and negated regular items—were also predicted to load on separate factors, as they are qualitatively different. An empirical study supported this explanation. Differential responding was found to be highest for participants at the mid-level of a trait and diminished toward the ends, revealing a quadratic relationship and a trait × method interaction. Thus, our findings demonstrate that the logical response pattern of individuals at the mid-level of a trait is another previously unrecognized explanation for why the inclusion of regular and reverse-keyed items can contribute to the apparent bi-dimensionality of unidimensional constructs (for data analysis results, see https://osf.io/krh2w/ ).

Стилі APA, Harvard, Vancouver, ISO та ін.

42

Yosua Alvin Adi Soetrisno, Bambang Winardi, and Enda Wista Sinuraya. "Generator protection system with reverse power relay on 1000 KVA 'Cummins' diesel generator at Cepu Human Resources Development Center." World Journal of Advanced Research and Reviews 14, no. 1 (April 30, 2022): 377–84. http://dx.doi.org/10.30574/wjarr.2022.14.1.0343.

Повний текст джерела

Анотація:

Each generator is designed to create a certain amount of electricity. However, there are situations when the generator cannot handle the current load. The solution is to employ two or more generators to produce as much power as the number of generators operating simultaneously or synchronizing (parallel generator). Several parameters must be configured throughout the synchronization process, including the phase sequence, voltage, frequency, and phase angle, which must be the same. An operation failure can occur if one of the prerequisites is not fulfilled, resulting in reverse power. The motoring condition is a condition that occurs when the primary mover of a parallel generator fails. A reverse power protection mechanism is required to prevent this motoring. When one of the generator's prime movers fails or the operation fails, the voltage and load will drop. The other generator then feeds another generator. The reverse power relay instructs the generator's main circuit breaker to open the circuit so that no additional equipment is harmed. This research aims to investigate and comprehend the reverse power relay protection system's use.

Стилі APA, Harvard, Vancouver, ISO та ін.

43

Yosua Alvin Adi Soetrisno, Bambang Winardi, and Enda Wista Sinuraya. "Generator protection system with reverse power relay on 1000 KVA 'Cummins' diesel generator at Cepu Human Resources Development Center." World Journal of Advanced Research and Reviews 14, no. 1 (April 30, 2022): 377–84. http://dx.doi.org/10.30574/wjarr.2022.14.1.0343.

Повний текст джерела

Анотація:

Each generator is designed to create a certain amount of electricity. However, there are situations when the generator cannot handle the current load. The solution is to employ two or more generators to produce as much power as the number of generators operating simultaneously or synchronizing (parallel generator). Several parameters must be configured throughout the synchronization process, including the phase sequence, voltage, frequency, and phase angle, which must be the same. An operation failure can occur if one of the prerequisites is not fulfilled, resulting in reverse power. The motoring condition is a condition that occurs when the primary mover of a parallel generator fails. A reverse power protection mechanism is required to prevent this motoring. When one of the generator's prime movers fails or the operation fails, the voltage and load will drop. The other generator then feeds another generator. The reverse power relay instructs the generator's main circuit breaker to open the circuit so that no additional equipment is harmed. This research aims to investigate and comprehend the reverse power relay protection system's use.

Стилі APA, Harvard, Vancouver, ISO та ін.

44

Xu, Song, Wei Jiang, and Seiji Hashimoto. "Analysis and Design of an Air-Coupled DC Transformer with a Hybrid Modulation Control Method." Energies 12, no. 13 (July 3, 2019): 2570. http://dx.doi.org/10.3390/en12132570.

Повний текст джерела

Анотація:

DC micro-grid is gaining increasing attention recently due to its highly efficient energy utilization and flexible energy exchange capabilities. In this paper, an air-coupled DC–DC transformer is proposed for the interconnection between the active load and the DC microgrid. The generic problems in an air-coupled power transfer system without ferromagnetic structure are discussed. A bidirectional half-bridge topology is also proposed to suit the characteristics of the stationary load and to realize the bidirectional power transfer between the active DC load and the DC grid. A Hybrid Modulation Method (HMM) is proposed; the small signal model is derived and linear control techniques are applied to the forward power transfer control, and phase model control is applied to the reverse power transfer model. The open-loop system is simulated by PSIM to get the characteristics of the forward and reverse transfer model, and the closed system is built in the MATLAB/SIMULINK to verify the effect of the forward frequency control method and the reverse phase control method. The prototype is built with a dsPIC controller, tests are performed to evaluate the characteristics of the transformer and the power flow control of the bidirectional power transfer.

Стилі APA, Harvard, Vancouver, ISO та ін.

45

Potrykus, Szymon, Luis Fernando León-Fernández, Janusz Nieznański, Dariusz Karkosiński, and Francisco Jesus Fernandez-Morales. "The Influence of External Load on the Performance of Microbial Fuel Cells." Energies 14, no. 3 (January 26, 2021): 612. http://dx.doi.org/10.3390/en14030612.

Повний текст джерела

Анотація:

In this work, the effect of the external load on the current and power generation, as well as on the pollutant removal by microbial fuel cells (MFCs), has been studied by step-wise modifying the external load. The load changes included a direct scan, in which the external resistance was increased from 120 Ω to 3300 Ω, and a subsequent reverse scan, in which the external resistance was decreased back to 120 Ω. The reduction in the current, experienced when increasing the external resistance, was maintained even in the reverse scan when the external resistance was step-wise decreased. Regarding the power exerted, when the external resistance was increased below the value of the internal resistance, an enhancement in the power exerted was observed. However, when operating near the value of the internal resistance, a stable power exerted of about 1.6 µW was reached. These current and power responses can be explained by the change in population distribution, which shifts to a more fermentative than electrogenic culture, as was confirmed by the population analyses. Regarding the pollutant removal, the effluent chemical oxygen demand (COD) decreased when the external resistance increased up to the internal resistance value. However, the effluent COD increased when the external resistance was higher than the internal resistance. This behavior was maintained in the reverse scan, which confirmed the modification in the microbial population of the MFC.

Стилі APA, Harvard, Vancouver, ISO та ін.

46

Petrík, Jozef, Peter Blaško, Andrea Vasilňaková, Peter Demeter, and Peter Futáš. "INDENTATION SIZE EFFECT OF HEAT TREATED ALUMINUM ALLOY." Acta Metallurgica Slovaca 25, no. 3 (September 25, 2019): 166. http://dx.doi.org/10.12776/ams.v25i3.1310.

Повний текст джерела

Анотація:

<p class="AMStitle">Abstract</p><p class="AMSmaintext">The aim of the submitted work is to study the influence of applied loads ranging from 0.09807 N to 0.9807 N on measured values of micro-hardness of heat treated aluminum alloy 6082. The influence of applied load on a measured value of micro-hardness was evaluated by Meyer’s index n, PSR method and by Analysis of Variance (ANOVA). The influence of the load on the measured value of micro-hardness is statistically significant and the relationship between the applied load and micro-hardness manifests the moderate reverse ISE. As the temperature of the solution treatment rises, the YS/UTS ratio and also Meyer’s index n, measured and “true hardness“ increase. On the other hand, its effect on the plastic properties of the alloy is ambiguous.</p>

Стилі APA, Harvard, Vancouver, ISO та ін.

47

Taegen, F., and R. Walczak. "Experimental verification of stray losses in cage induction motors under no-load, full-load and reverse rotation test conditions." Archiv für Elektrotechnik 70, no. 4 (July 1987): 255–63. http://dx.doi.org/10.1007/bf01574130.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

48

Anwar, Mohammed Sadique, Prima Sukma Permata, Md Imran Siddiqui, Jung Ruey Tsai, Shao Ming Yang, and Gene Sheu. "Analysis of LDMOS for Effect of Fingers, Device-Width and Inductance (Load) on Reverse Recovery." Applied Mechanics and Materials 229-231 (November 2012): 2077–81. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.2077.

Повний текст джерела

Анотація:

This work demonstrates the effect of fingers, device-width and inductance on reverse recovery of LDMOS by unclamped inductive switching (UIS) circuit simulation for two dimensional (2D) and three dimensional (3D) devices. All the observations have been done for maximum pulse width at which device pass under UIS test. For UIS simulations the failure criteria is taken as the device temperature reaching a critical value of 650K. It has been shown that reverse recovery charge (Qrr) increased linearly with number of fingers, device width and inductance.

Стилі APA, Harvard, Vancouver, ISO та ін.

49

Sivapriya, S. V., and Rahul Ramanathan. "Load – Displacement Behaviour of a Pile on a Sloping Ground for Various L/D Ratios." Slovak Journal of Civil Engineering 27, no. 1 (March 1, 2019): 1–6. http://dx.doi.org/10.2478/sjce-2019-0001.

Повний текст джерела

Анотація:

Abstract An experimental study was carried out to understand the behaviour of a laterally loaded single pile on a slope with different length/diameter (L/D) ratios driven into cohesionless soil for a relative density of 70%. Static loading was applied in both forward and reverse directions for slopes of 1V:1.5H, 1V:2H, and 1V:2.5H for a constant L/D ratio representing flexible pile behaviour. It was observed that the load ratio (load on a sandy slope to the horizontal ground) decreased with an increase in the slope’s angle. The post-static behaviour of the pile under the same conditions was also studied to evaluate the elastic displacement, which increased with an increase in the slope’s angle. Due to the constant passive resistance under the reverse loading, the lateral load on the slope’s crest was almost equal to the horizontal ground’s condition. The effect of the L/D ratio was studied by varying the length and diameter and by maintaining the other parameter as a constant. The lateral load of a pile increased with an increase in its length and diameter.

Стилі APA, Harvard, Vancouver, ISO та ін.

50

You, Yajun, and Xin Guo. "Evolution of hysteresis characteristic of shape memory alloys at incomplete phase transformation cyclic loading." Smart Materials and Structures 31, no. 1 (December 15, 2021): 015047. http://dx.doi.org/10.1088/1361-665x/ac3d9f.

Повний текст джерела

Анотація:

Abstract The phase transformation ratchetting of shape memory alloys (SMAs) at incomplete phase transformation cyclic loading is experimentally and theoretically investigated. To this end, two different kinds of incomplete phase transformation cyclic loading tests on NiTi wires are performed, i.e. incomplete transformation cyclic loads are respectively applied at the stages of forward martensitic transformation and reverse martensitic transformation. When the cyclic load of incomplete transformation is applied in the forward martensitic transformation stage, a novel phenomenon is discovered: although there is no greater stress to drive the anstenite turn to martensite, the SMAs can still gradually undergo martensitic transformation and accumulation until martensite reaches saturation. The hysteretic behavior finally reaches a shakedown state where the strain–stress curve no longer changes with the number of cycles. When the cyclic load of incomplete transformation is applied in the reverse martensitic transformation stage, a similar phenomenon is obtained. According to the analysis of the temperature evolution during the deformation process of the SMAs, combined with the relationship between the phase transformation yield stress and the temperature of SMAs, the experimental results are reasonably explained. This research is of great significance for a more comprehensive grasp of the mechanical behavior of SMAs.

Стилі APA, Harvard, Vancouver, ISO та ін.

Статті в журналах з теми "Reverse load"

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