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第37届中国控制会议

作者： Wang Xin-wang Shen Xiao-lin Cao Hui-liang Deng Bo-wen School of Electrical and Control Engineering North University of China IEEE Science and Technology on Electronic Test & Measurement Laboratory North University of China School of Information and Communication Engineering North University of China

The large random errors in a typical MEMS gyros under the ranges of relative humidity *** order to solve the large random error under the ranges of relative humidity,a method based on adaptive threshold denoising and neural net work is proposed in this *** relative humidity experiment is carried to test LSM6DS3 MEMS *** the adaptive threshold denoising is used to separate the drift error and drift data modeled with RBF neural *** experimental res ults show the effectiveness of the method,and it is of great significance in improving the performance of MEMS gyros.

关键词： MEMS gyroscopes relative humidity adaptive threshold function random error model error compensations radial basis function neural network

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Piezoelectric thermoelastic dissipation research of piezoelectric harvester under different vibration

Piezoelectric thermoelastic dissipation research of piezoele...

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2018 2nd International Conference on Electronic Information technology and Computer engineering (EITCE 2018)

作者： Yuting Liu Jiahao Deng Yong Ye Zhuo Hou Zuodong Duan Sha Xu School of Mechatronical Engineering Beijing Institute of Technology Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology College of Information Engineering Shenzhen University National Key Laboratory of Electronic Measurement Technology North University of China

Piezoelectric materials are widely used to form piezoelectric energy harvesters. Also, the thermoelastic dissipation always influences the energy harvesting efficiency, during the energy harvest process. Therefore, in this paper, we discuss the effect of thermoelastic dissipation on the piezoelectric harvester through numerical calculation, simulation and experiment. The piezoelectric thermoelastic coupling governing equations under different vibration are derived, which are based on the Euler-Bernoulli beam theory, thermal conduction model and piezoelectric field model. Then, the structure frequency shift and thermoelastic damping are studied via numerical calculation and simulation. Meanwhile, we show the influence of the temperature field on the piezoelectric structure under different vibration modes. Furth more, we research the variations of piezoelectric structure thermoelastic dissipation characteristics under different structure geometry sizes. Based on these analyses, the effect of piezoelectric thermoelastic dissipation on the piezoelectric harvester is researched

关键词： Piezoelectric thermoelastic dissipation research of piezoelectric harvester under different vibration

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Prediction of Leakage Rates Through Sealing Connections with Metallic Gaskets

Prediction of Leakage Rates Through Sealing Connections with...

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2018 First International Conference on Environment Prevention and Pollution control technology (EPPCT 2018)

作者： Xiu Feng Boqin Gu Penggao Zhang Fluid Sealing Measurement and Control Engineering Research and Development Center of Jiangsu Province Nanjing Polytechnic Institute College of Mechanical and Power Engineering Nanjing University of Technology

According to fractal theory,the leakage model of metallic gaskets was developed in order to predict leakage rate of metallic gasket sealing *** relationship among the leakage rate,the fractal dimension,the compressive stress and the scale coefficient obtained by experiment,is approximately the same as that by the sealing model of metallic gaskets,which indicates that the sealing model of metallic gaskets established in this paper is *** research results not only are helpful for the development and application of metallic gaskets,but also contribute to the establishment of the design criterion and the design method of metallic gasket connections.

关键词： Prediction of Leakage Rates Through Sealing Connections with Metallic Gaskets

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controller Design and Implementation for a Pilot Plant Binary Distillation Column

Controller Design and Implementation for a Pilot Plant Binar...

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IEEE Distributed Computing, VLSI, Electrical Circuits and Robotics (DISCOVER)

作者： Vinayambika S. Bhat I. Thirunavukkarasu V. I. George C Sreelatha Dept. of Electronics and Communication Engineering Mangalore Institute of Technology and Engineering Moodabidri-574225 Karnataka India Dept. of Instrumentation and Control Engineering Manipal Institute of Technology MAHE Manipal-576104 Karnataka India

ISBN: (纸本)9781538653241;9781538653234

The binary distillation column is a highly nonlinear and higher order system, where the control of temperatures plays a very vital role in maintaining the purity of the end products. The article deals with the Proportional Integral Derivative (PID) controller design in both centralized and decentralized control strategy. The decentralized controller is designed with an additional controller called as the decoupler. The centralized controller that is designed is with decoupling process with an additional integral for better control with limited control interactions. The closed loop servo response is recorded. Also, both the control algorithm are validated by implementing it on a pilot plant binary distillation column.

关键词： Distillation equipment Mathematical model Transfer functions Process control Servomotors Real-time systems Centralized control

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Toward High-Resolution Inertial Sensors Employing Parametric Modulation in Coupled Micromechanical Resonators

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Physical Review Applied 2019年第4期12卷 044005-044005页

作者： Chun Zhao Xin Zhou Milind Pandit Guillermo Sobreviela Sijun Du Xudong Zou Ashwin Seshia The Nanoscience Centre Department of Engineering University of Cambridge Cambridge CB3 0FF United Kingdom MOE Key Laboratory of Fundamental Physical Quantities Measurement and Hubei Key Laboratory of Gravitation and Quantum Physics PGMF and School of Physics Huazhong University of Science and Technology Wuhan 430074 China Department of Intelligent Machinery and Instruments College of Intelligence Science National University of Defense Technology Changsha 410073 China Department of Electrical Engineering and Computer Sciences University of California Berkeley California 94720 USA State Key Laboratory of Transducer Technology Institute of Electronics Chinese Academy of Sciences Beijing 100190 China School of Electronics Electrical and Communication Engineering University of Chinese Academy of Sciences Beijing 10090 China

Highly accurate microelectromechanical-systems inertial sensors have a wide range of potential applications, including inertial navigation and seismometry. Conventional approaches to the implementation of inertial sensors rely on transducers that convert the external acceleration into changes in displacement of a proof mass or shifts in resonant frequencies. Recently, it has been demonstrated that inertial forces can also be measured through the monitoring of the spatial energy distribution between two coupled microresonators. To extend this approach, we show that a weak dynamic coupling can be established through periodic modulation of the stiffness for a mechanically coupled microresonator system integrated as part of an accelerometer, enhancing the scale factor and resolution of the accelerometer. The resulting capability of parametric modulation also enables the tuning of the operating point of the accelerometer through the modulation frequency. Utilizing this technique, we show that the scale factor of the accelerometer can be enhanced by a factor of 188 and a factor-of-25 improvement in sensor resolution is demonstrated. Dynamic tuning of the sensor scale factor and inherent noise filtering are also demonstrated.

关键词： Classical mechanics Metrology Coupled oscillators Micromechanical & nanomechanical oscillators Micromechanical devices Solid-state detectors Chaos & nonlinear dynamics

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Ultrasonic Pulse Signal Resonance Features in Layered CFRP Within Voids

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Journal of Wuhan University of technology(Materials Science) 2017年第3期32卷 695-702页

作者：杨辰龙陈越超 WANG Zhe ZHENG Huifeng The State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou Applied Acoustic Research Institute Science and Technology on Sonar Laboratory College of Metrology &Measurement Engineering China Jiliang University

The ultrasonic pulse signal resonance features in layered carbon fiber reinforced plastic（CFRP） within voids were researched. The frequency domain model of acoustic wave propagation in multilayered medium was established. Then the reflection coefficient of multilayered CFRP within voids was numerically calculated. The results are as follows. When the CFRP laminate is tested by ultrasonic whose center frequency is close to the CFRP inherent resonant frequency, the ultrasonic may generate resonance phenomenon in CFRP. If CFRP contains evenly distributed voids, the frequency of resonant signal and its amplitude all decrease with the increase of porosity. For the thick section CFRP within local concentrated voids, the local concentrated voids near testing surface will cause signal frequency reduction and the decrease of its amplitude. But the voids which exist in layers far away from testing surface almost have no influence on signal resonance. The ultrasonic pulse echo testing was conducted for thick section CFRP specimen. The analysis results of testing signals were in accordance with the results of the numerical calculation, showing that the reflection coefficient frequency response model can effectively explain the ultrasonic resonance phenomenon in layered CFRP within voids.

关键词： carbon fiber reinforced plastic void resonance reflection coefficient frequency response

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Radial-and Axial-Flux Synchronous Motors for High-Speed Low-Power Applications

Radial-and Axial-Flux Synchronous Motors for High-Speed Low-...

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International Conference on Power Electronic Drives and Energy Systems for Industrial Growth

作者： S. Neethu S.P. Nikam B.G. Fernandes Saumitra Pal A.K. Wankhede Department of Electrical Engineering Indian Institute of Technology Bombay Mumbai India Control Measurement and Drive Section Bhabha Atomic Research Centre Mumbai India

ISBN: (纸本)9781538693179;9781538693162

High-speed motors rotating at speeds above 10,000 rpm are finding many applications nowadays. High efficiency and reliability are demanded by the applications like centrifugal compressors, pumps, machine tools, centrifuges, drills and aerospace. This paper presents the analysis and comparison of a radial-and axial-flux permanent magnet synchronous motors for high-speed, low-power applications. Two radial flux configurations and one axial flux motor are considered for the study. Various challenges in the electromagnetic, mechanical and thermal analysis of these motors are discussed. The advantages and disadvantages of each topology are identified. 3-D finite element analysis is performed for the multiphysics study of the motors and the simulation results are presented.

关键词： Permanent magnet motors Induction motors Rotors Reluctance motors Stator windings

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Preface

Communications in Computer and Information Science

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communications in Computer and Information Science 2020年 1092 CCIS卷 v-vi页

作者： Zamuda, Aleš Das, Swagatam Suganthan, Ponnuthurai Nagaratnam Panigrahi, Bijaya Ketan University of Maribor Maribor Slovenia Electronics and Communication Sciences Unit Indian Statistical Institute KolkataWest Bengal India Division of Control and Instrumentation Nanyang Technological University Singapore Singapore Department of Electrical Engineering Indian Institute of Technology Delhi New DelhiDelhi India

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A Self-Positioning Algorithm Based on Wireless Signal's Angle of Arrival and its Evaluation

A Self-Positioning Algorithm Based on Wireless Signal's Angl...

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2018 International Conference on Computer,communication and Network technology(CCNT 2018)

作者： Jie-tai WANG Xiao-niu YANG Zhen-xing LUO Zi TENG Xing LING Mathematics and Information Engineering College Jiaxing University Science and Technology on Communication Information Security Control Laboratory 36 Research Institute of CETC

This paper proposes an algorithm based on angle of arrival(AOA) of the wireless signal, and makes a simulation evaluation of the results of the algorithm in different scenarios. The evaluation shows that the positioni... 详细信息

关键词： Wireless signal Self-positioning AOA

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Biochar production, activation, and applications: A comprehensive technical review

Carbon Capture Science & Technology

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Carbon Capture Science & technology 2025年 16卷

作者： Lisa Mingzhe Sun Sean R. McIntyre Paul Iacomi Katie Everden Paul T. Williams Shuang Zong Xinying Liu Xiefei Zhu Yanke Yang Shuangjun Li Gang Wu Fei Huang Lina Liu Xiangzhou Yuan Huiyan Zhang Junjie Zhang Haiping Yang Wei Chen Hongman Sun Yang Cao Chunfei Wu Surface Measurement Systems Ltd. Alperton London HA0 4PE UK School of Chemical and Process Engineering University of Leeds Leeds LS2 9JT UK Institute for Catalysis and Energy Solutions University of South Africa Private Bag X6 FL Roodepoort 1709 South Africa Hebei Chemical & Pharmaceutical College No. 88 Fangxing Road Shijiazhuang Hebei Province China Sun Yat-sen University School of Advanced Energy Shenzhen Campus of Sun Yat-sen University No.66 Gongchang Road Guangming District Shenzhen Guangdong 518107 China Department of Chemical and Biological Engineering Korea University 145 Anam-ro Seongbuk-gu Seoul 02841 Republic of Korea Ministry of Education of Key Laboratory of Energy Thermal Conversion and Control School of Energy and Environment Southeast University Nanjing 210096 China Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and Engineering Nankai University Tianjin 300350 China State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan 430074 China College of Engineering Nanjing Agricultural University No. 40 Dianjiangtai Road Nanjing Jiangsu Province 210031 China State Key Laboratory of Heavy Oil Processing College of Chemistry and Chemical Engineering China University of Petroleum Qingdao 266580 China School of Chemistry and Chemical Engineering Queen's University Belfast Belfast BT7 1NN UK

Our planet has been facing critical challenges since the late 20th century, including climate change, resource shortages, environmental degradation and pollution, demanding urgent and sustainable solutions. Biochar, a carbon-rich material produced via biomass pyrolysis, has gained attention for its great potentials in environmental remediation, pollutant removals, carbon neutrality, soil amendment, building materials, and etc. The performance of biochar in these applications is closely linked to its physicochemical properties, which are influenced by the feedstock and the preparation/activation methods. This paper reviews a wide range of biochar produced from various feedstocks, and the associated performance in different applications. Advanced characterisations are discussed to unveil the fundamental mechanisms and provide insights for further improvement and optimization. The techno-economic analysis evaluates the feasibility, challenges, and opportunities for scaling up and adopting biochar in potential applications. By focusing on biochar's multifunctionality and sustainability, this paper provides a reference for future research on developing biochar as a green technology with environmental and economic benefits.

关键词： Biochar production Biochar characterisation Carbon neutrality Environmental remediation, Soil amendments Pollutant removal Techno-economic analysis

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