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42nd Chinese control Conference, CCC 2023

作者： Cheng, Bin Li, Gang College of Electronics and Information Engineering Department of Control Science and Engineering Tongji University Shanghai201804 China Shanghai Research Institute for Intelligent Autonomous Systems Shanghai201210 China

ISBN: (纸本)9789887581543

This paper studies the distributed matrix-scaled consensus, which can be treated as a kind of generalized cooperative control problem and has broad applications in the field of social network and engineering. Distributed protocols are expected to achieve cluster consensus with respect to the matrix-based weight and deal with the unknown disturbances present to the system dynamics. A static distributed protocol is first presented, including a linear term and a nonlinear term based on the sliding-mode control technique, under which the matrix-scaled consensus is realized and the disturbances are resisted. Then, a distributed adaptive algorithm is designed by using the adaptive method to introduce time-varying gains, obeying differential equations. It is to be pointed out that the static protocol is more concise if the parameter condition is satisfied, and the adaptive protocol is completely distributed and relies on no global information when designing or using the algorithm. Simulation examples are provided to further verify the designed algorithms. © 2023 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Adaptive algorithms

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Robust control Design for Multi-Input Multi-Output Permanent Magnet Synchronous Motor Systems under Load Torque Disturbances 10

Robust Control Design for Multi-Input Multi-Output Permanent...

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10th International Conference on control, Instrumentation and Automation, ICCIA 2024

作者： Norollahzadegan, Mohsen Behnamgol, Vahid Vali, Ahmadreza Damavand Brach Islamic Azad University Energy Research Center Damavand Iran Malek Ashtar University of Technology Department of Control Engineering Tehran Iran

ISBN: (纸本)9798331509972

This paper presents a robust control approach for permanent magnet synchronous motors. The nonlinear model of these motors includes two voltage inputs in d-q coordinates and two outputs: speed and current in the d direction. Load torque is viewed as a perturbation. To address this, we employ a combined nonlinear multi-input-multi-output control method based on an observer. The observer estimates the uncertain load torque, and the nonlinear MIMO controller designs the control input vector accordingly. The observer, developed using the sliding mode method, estimates both the load torque and its derivative, which are essential for the control system. The controller design also utilizes MIMO sliding mode control. The stability of the feedback-controlled system, comprising the MIMO controller, observer, and motor dynamics, is proven using the Lyapunov method. The proposed hybrid method offers advantages such as nonlinearity handling, robustness to uncertainties, and vector control design. These features are shown both analytically and via computer simulations. © 2024 IEEE.

关键词： Permanent magnets

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Corrigendum to "The prevalence and associated disability burden of mental disorders in children and adolescents in China: a systematic analysis of data from the Global Burden of Disease Study" [The Lancet Regional Health-Western Pacific Volume 55, February 2025, 101486]

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The Lancet regional health. Western Pacific 2025年 58卷 101556页

作者： Wanyue Dong Yunning Liu Ruhai Bai Lei Zhang Maigeng Zhou School of Elderly Care Services and Management Nanjing University of Chinese Medicine Nanjing China. National Center for Chronic and Noncommunicable Disease Control and Prevention Chinese Center for Disease Control and Prevention Beijing China. School of Public Affairs Nanjing University of Science and Technology Nanjing China. Clinical Medical Research Center Children's Hospital of Nanjing Medical University Nanjing China. China-Australia Joint Research Centre for Infectious Diseases School of Public Health Xi'an Jiaotong University Health Science Centre Xi'an China. Melbourne Sexual Health Centre Alfred Health Melbourne Australia. Central Clinical School Faculty of Medicine Monash University Melbourne Australia.

[This corrects the article DOI: 10.1016/***.2025.101486.].

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Refined characterization of internet of things applications in power systems 4

Refined characterization of internet of things applications ...

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4th IEEE Conference on Energy Internet and Energy System Integration, EI2 2020

作者： Ling, Jiajie Miao, Siwei Zhang, Xiaojuan Chen, Changyu Peng, Cheng Jiang, Quanyuan Zhejiang University College of Electrical Engineering Hangzhou China China Electric Power Research Institute Beijing China Zhejiang University College of Control Science and Engineering Hangzhou China

ISBN: (纸本)9781728196060

With the accelerating development of the Internet of Things (IoT), its applications in power system are gradually becoming various and comphcated, followed by the diversity of relevant technical requirements. In order to identify the characteristics of these requirements of IoT in power system, this paper proposes a refined characterization approach to define, classify and summarize them from three different aspects, namely, performance-criticaL security-critical and reachability critical. In multiple IoT enabled apphcation scenarios, performance-critical index and security-critical index mainly focus on data transmission and calculation, while reachability-critical index focuses on the communication coverage and quality of service, which creates a new perspective to characterize power system IoT applications and their technical requirements. © 2020 IEEE.

关键词： Internet of things

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Numerical and Experimental Study on Performance of a Low-Backpressure Polyhedral Thermoelectric Generator for Waste Heat Recovery

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Journal of Thermal science 2023年第1期32卷 109-124页

作者： QUAN Rui LI Yangxin LI Tao CHANG Yufang YAN Huaicheng Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System Hubei University of TechnologyWuhan 430068China Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment Hubei University of TechnologyWuhan 430068China

Optimized fin arrangement and dimension of heat exchanger can improve the maximum output power of thermoelectric generator(TEG)system which converts the wasted heat into electricity with thermoelectric modules(TEMs).Considering that the geometric symmetry contributes to the temperature uniformity improvement and convenient TEMs arrangement,a low-backpressure TEG system based on a polyhedral-shape heat exchanger was *** assess the effect of inner topology and fin parameters on the heat transfer and output power of the TEG system,a realizable k-?turbulence based numerical model was established and validated to perform numerical *** results demonstrate that increasing fin length,fin width and fin intersection angle are beneficial to the average surface temperature,temperature distribution uniformity and maximum output power of the TEG ***,decreasing fin spacing distance contributes to the enhanced average surface temperature and maximum power of TEG system,and has insignificant effect on its temperature *** inserted fins with optimal length,width,intersection angle and spacing distance enhance higher output power,whereas result in increasing *** maximum difference between the experimental and simulation results is 3.2%,which validates the feasibility of the established numerical *** also provides a theoretical reference to the optimal design and performance analysis of low-backpressure TEG systems used in automobile exhaust heat recovery.

关键词： heat exchanger thermoelectric generator inner topology fin parameters numerical model

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research on Magnetic Integration Technology of Half-Bridge Converter for Aerospace Application 5

Research on Magnetic Integration Technology of Half-Bridge C...

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5th International Conference on Electrical engineering and control Technologies, CEECT 2023

作者： Zhi, Shubo Tang, Qi Wang, Jianping Pei, Xingzheng Zhang, Xiaofeng Ji, Mingming Beijing Spacecrafts Manufacturing Factory Beijing Space Power Conversion and Control Engineering Technology Research Center Beijing China Beijing Institute of Spacecraft System Engineering Beijing China

ISBN: (纸本)9798350342253

This paper presents magnetic integration provides an accurate method for the fully utilizing the magnetizing curves of several magnetic components by integrating into one magnetic core in order to achieve a lighter and smaller converter. This paper aims to put forward a method which can apply the magnetic integration into the DC-DC converter with half-bridge topology in the aerospace. This paper has fully utilized the magnetic integration into the analysis of converters in the working stages and the following established magnetic circuit model. An engineering prototype based on aerospace-grade components is developed. Then, the problems existed in the practical application of magnetic integration into the DC-DC converter in the aerospace are discussed and the related solutions are put forward. As a result, the experimental results of the engineering prototype proves the feasibility of the solutions raised in this paper. © 2023 IEEE.

关键词： DC-DC converters

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Expression, purification and characterization of a phyA^m-phyCs fusion phytase

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Journal of Zhejiang University-science B(Biomedicine & Biotechnology) 2008年第7期9卷 536-545页

作者： Li-kou ZOU Hong-ning WANG Xin PAN Guo-bao TIAN Zi-wen XIE Qi WE Hui CHEN Tao XIE Zhi-rong YANG College of Life Science Bioengineering Research Center for Animal Disease Prevention and Control Sichuan University Chengdu 610065 China Faculty of Biotechnology of Dujiangyan Campus Sichuan Agricultural University Dujiangyan 611830 China College of Earth Science Chengdu University of Technology Chengdu 610059 China College of Life Science Sichuan Agricultural University Ya ＇an 625014 China

The phyA^m gene encoding acid phytase and optimized neutral phytase phyCs gene were inserted into expression vector pPIC9K in correct orientation and transformed into Pichiapastoris in order to expand the pH profile ofphytase and decrease the cost of production. The fusion phytase phyA^m-phyCs gene was successfully overexpressed in P. pastoris as an active and extracellular phytase. The yield of total extracellular fusion phytase activity is （25.4±0.53） U/ml at the flask scale and （159.1±2.92） U/ml for high cell-density fermentation, respectively. Purified fusion phytase exhibits an optimal temperature at 55 ℃ and an optimal pH at 5.5-6.0 and its relative activity remains at a relatively high level of above 70% in the range ofpH 2.0 to 7.0. About 51% to 63% of its original activity remains after incubation at 75 ℃ to 95 ℃ for 10 min. Due to heavy glycosylation, the expressed fusion phytase shows a broad and diffuse band in SDS-PAGE （sodium dodecyl sulfate-polyacrylamide gel electrophoresis）. After deglycosylation by endoglycosidase H （EndoHf）, the enzyme has an apparent molecular size of 95 kDa. The characterization of the fusion phytase was compared with those ofphyCs andphyA^m.

关键词： Expression. PhvA^m. PhvCs. Fusion ohvtase. Pichia pastoris

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Experimental installations for investigation of scattering neutron angle distribution

Experimental installations for investigation of scattering n...

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International Conference on Current Problems in Nuclear Physics and Atomic Energy, NPAE 2006

作者： Gritzay, O.O. Kolotyi, V.V. Pshenychnyi, V.A. Klimova, N.A. Libman, V.A. Kyslitskyi, A.I. Venedyktov, V.M. Archipov, V.M. Institute for Nuclear Research National Academy of Sciences of Ukraine Kyiv Ukraine State Scientific Engineering Center of Control Systems and Emergency Response Kyiv Ukraine

The two experimental installations for measurements of the angular distribution of the quasi-monochromatic neutron beams IASD-1 and IASD-2 (Installation for Angle Scattering Distribution) scattered by investigated samples are described here. A vacuum cylinder chamber in the middle of which an electromechanical knot is placed for automatic transposition of scattering samples is the basis of both installations. The neutron beam is transported to the sample and is taken from through the tubes closed by thin aluminum diaphragms. Both installations have the identical electronic measurement circuits. Special program ZERKIN-3 is used for management of measurement process. The measurements of the angular distributions are relative. As the standard, 208Pb sample is used. Background spectrums are measured when the beam is screened with polyethylene sample. The IASD-1 installation allows conducting the measurements under any angle in the range 30 - 150°. Registration of the scattered neutrons takes place simultaneously with four detector assemblies. One assembly consists of seven helium counters M-17 with the one pre-amplifier and individual radiation shielding. The IASD-2 installation is intended for measurements under the fixed angles of 15, 30, 55, 90, 125, 150 and 165°. For neutron registration LND-2527 and LND-281 counters are used, which are placed in common radiation shielding filled with boron carbide. The above mentioned detector assemblies with M-17 can be also used.

关键词： Angular distribution

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A range free localization algorithm based on restricted-area for wireless sensor networks

A range free localization algorithm based on restricted-area...

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3rd International Multi-Conference on Computing in the Global Information Technology, ICCGI 2008

作者： Wang, Chao Liu, Kai Xiao, Nan School of Electronics and Information Engineering Beijing University of Aeronautics and Astronautics Beijing China Research Center of Information and Control Dalian University of Technology Dalian China

ISBN: (纸本)9780769532752

This paper presents a restricted-area-based localization algorithm (RAL) for wireless sensor networks (WSN), in which radio connectivity and principle of perpendicular bisectors are used to provide a lower estimation error than some of restricted-area-based localization algorithms. In the RAL algorithm, anchor nodes can transmit beacon signals at different power levels, which divide the possible transmission ranges of an anchor into a circle and multiple rings. The intersection of circle or rings of all the anchors heard by unknown node forms restricted-area I. In addition, we utilize all the perpendicular bisectors of the line which connects each pair of anchor nodes to obtain restricted-area II. Based on the restricted-area I and restricted-area II, we can calculate valid intersection points, and take average value of all these points as the estimated location of the unknown nodes. The proposed algorithm is range-free and energy efficient. Neighboring sensor nodes do not need to exchange information. Each sensor node only relies on information of anchors it heard to compute two kinds of restricted-areas and estimates its location. Simulation results show that the proposed algorithm has less estimation error than Centroid, Convex and CAB localization algorithms. © 2008 IEEE.

关键词： Sensor nodes

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research of deformation law on high manganese steel with different alloy composition

Research of deformation law on high manganese steel with dif...

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China Functional Material Technology and Industry Forum, 2016

作者： Ye, Tie Yang, Ping Lu, Zhi-Wen Ma, Chun-Hua New Materials Engineering Technology Center Nan Yang Normal University Henan China Engineering Laboratory of Petroleum Equipment Intelligent Control Henan China School of Materials Science and Engineering University of Science and Technology Beijing China

ISBN: (纸本)9783035710526

The organizations and phase composition after forging and heat treatment of the stacking fault energy for the three high manganese steel with 2.99 mJ/m2,7.9 mJ/m2 and23 mJ/m2 were observed. It's analysised that the microstructure and orientation change of three high manganese steel by SEM and EBSD and the effect of alloy elements and the composition of the material on microstructure of high manganese steel;Through Static compressive deformation of cylindrical specimen under different strain rates experimental, the effect of strain rate on the deformation mechanism of different components of high manganese steel was analysised. Cylindrical specimens by static compression at different strain rates, analysis of strain rate on the different components of high manganese steel impact deformation mechanism;The mechanical performance characteristics are analyzed under different strain rate of three components high-manganese steel by stress - strain curves. By Compressive Split-Hopkinson Pressure Bar experiments to study the mechanism of high manganese steel deformation at high strain rates. The study found: the exclusion of the impact of the martensitic transformation can produce 18Mn high manganese TRIP or TWIP effect after deformation. Through observation and calculation, it found C, Al's content of alloying elements on the grain sizes less affected, but the starting temperature of martensitic transformation and layer greatly affects high manganese wrong size possible. Through analysis, found C, Al decides that the high content of alloying elements manganese organization original phase composition and deformation mechanism;organizations γ + Ε-M + α′-M high manganese TRIP effect occurs, organizations γ + Ε- M's high manganese TRIP effect occurs, tissue TWIP effect of high manganese steel γ. © 2017 Trans Tech Publications.

关键词： Strain rate

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