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IET International Radar Conference 2015

作者： Yin, Wei Yang, Wenfu Ding, Zegang Liu, Wei Zhang, Qingjun Ren, Jingjing Beijing Key Laboratory of Embedded Real-Time Information Processing Technology Radar Research Lab. Beijing Institute of Technology Beijing100081 China China Academy of Launch Vehicle Technology Beijing100076 China Beijing Institute of Spacecraft System Engineering CAST Beijing100094 China

ISBN: (纸本)9781849199940

Elliptical orbit and squint mode are widely used in the system design of geosynchronous synthetics aperture radar (GEO SAR) to improve the coverage performance. In this paper, the effects of orbit height variation and squint mode to pulse repetition frequency (PRF) design are analyzed. The orbit height variation causes the variation of nadir interference and beam illumination region, and squint mode produces large range cell migration (RCM). These can induce invalidations of the designed PRF. Based on this, the constraints of nadir interference and transmit interference are updated for GEO SAR, and the effective time for the designed PRF is derived. PRF number required for imaging in one orbital period is analyzed.

关键词： Synthetic aperture radar

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Observer-based consensus tracking for nonlinear multi-agent systems with intermittent communication 33

Observer-based consensus tracking for nonlinear multi-agent ...

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第三十三届中国控制会议

作者： CHU Hongjun CAI Yunze ZHANG Weidong Department of Automation Shanghai Jiaotong Universityand Key Laboratory of System Control and Information ProcessingMinistry of Education of China

ISBN: (纸本)9781479947249

This paper addresses the observer-based consensus tracking problem of multi-agent systems with intermittent communication *** agent dynamics is modeled as general linear system attached the Lipschitz-type nonlinear *** in reality communications among mobile agents are intermittent,a class of non-continuous observer-type protocol is proposed based on each agent only intermittently sharing relative outputs with *** virtue of the matrix theory,the switching system theory and the averaging approach,a multi-step protocol design procedure is presented,and the sufficient condition is further derived to ensure the observer-based consensus ***,the theoretical findings are validated by a numerical example

关键词： nonlinear multi-agent systems consensus tracking observer intermittent communication switching topology

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The Vibration control of Flexible Manipulators Based on Model Predictive control Method 33

The Vibration Control of Flexible Manipulators Based on Mode...

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第三十三届中国控制会议

作者： ZHANG Xiaoying LI Dewei XI Yugeng Key Laboratory of System Control and Information Processing Ministry of Education Department of Automation Shanghai Jiao Tong University

ISBN: (纸本)9781479947249

This paper proposes a hierarchical control structure based on model predictive control to address the vibration suppression of flexible manipulators under the dynamic constraints. Due to the coupling relationship between the trajectory and the flexible vibration, it provides a solution to vibration reduction if the trajectory can be rationally planned. In the decision layer,an optimal reference trajectory is planned with consideration of the dynamic constraints to ensure the manipulator to locate at the desired position as soon as possible and the reduced flexible vibration is suppressed during the movement. In the execution layer, the tracking controller is designed to minimize a quadratic performance index of the prediction error. Simulations for a single-link flexible manipulator are performed to validate the proposed controllers.

关键词： Model Predictive control,Flexible Manipulator,Vibration control,Dynamic Constraints,Hierarchical control

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Unfalsified Adaptive PID control with a Fading Memory Cost Function 33

Unfalsified Adaptive PID Control with a Fading Memory Cost F...

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第三十三届中国控制会议

作者： CHEN Kexin LI Shaoyuan Department of Automation Shanghai Jiao Tong Universityand Key Laboratory of System Control and Information ProcessingMinistry of Education

ISBN: (纸本)9789881563842

In this paper, we present a new cost function with fading memory and time-window in order to decrease the influence of old data in unfalsified adaptive control applications where the plant varies slowly or changes suddenly with time. Based on the unfalsified adaptive PID control, when the controller inserted in the system cannot guarantee the stability of the system, the cost function with a fading memory can detect the instability more quickly and then switch into a new stabilizing controller faster.

关键词： Unfalsified adaptive control,Fading memory,PID control,Cost function

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Global burden of 369 diseases and injuries in 204 countries and territories, 1990–2019: a systematic analysis for the Global Burden of Disease Study 2019

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The Lancet 2020年第10258期396卷 1204-1222页

作者： Abbafati, Cristiana Abbas, Kaja M. Abbasi, Mohammad Abbasifard, Mitra Abbasi-Kangevari, Mohsen Abbastabar, Hedayat Abd-Allah, Foad Abdelalim, Ahmed Abdollahi, Mohammad Abdollahpour, Ibrahim Abedi, Aidin Abedi, Parisa Abegaz, Kedir Hussein Abolhassani, Hassan Abosetugn, Akine Eshete Aboyans, Victor Abrams, Elissa M. Abreu, Lucas Guimarães Abrigo, Michael R.M. Abu Haimed, Abdulaziz Khalid Abualhasan, Ahmed Abu-Gharbieh, Eman Abu-Raddad, Laith Jamal Abushouk, Abdelrahman I. Acebedo, Alyssa Ackerman, Ilana N. Adabi, Maryam Adair, Tim Adamu, Abdu A. Adebayo, Oladimeji M. Adedeji, Isaac Akinkunmi Adekanmbi, Victor Adelson, Jaimie D. Adeoye, Abiodun Moshood Adetokunboh, Olatunji O. Adham, Davoud Advani, Shailesh M. Afarideh, Mohsen Afshari, Mahdi Afshin, Ashkan Agardh, Emilie E. Agarwal, Gina Agasthi, Pradyumna Agesa, Kareha M. Aghaali, Mohammad Aghamir, Seyed Mohammad Kazem Agrawal, Anurag Ahmad, Tauseef Ahmadi, Alireza Ahmadi, Keivan Ahmadi, Mehdi Ahmadieh, Hamid Ahmadpour, Ehsan Ahmed, Muktar Beshir Aji, Budi Akalu, Temesgen Yihunie Akinyemi, Rufus Olusola Akinyemiju, Tomi Akombi, Blessing Akunna, Chisom Joyqueenet Alahdab, Fares Al-Aly, Ziyad Alam, Khurshid Alam, Noore Alam, Samiah Alam, Tahiya Alanezi, Fahad Mashhour Alanzi, Turki M. Albertson, Samuel B. Alcalde-Rabanal, Jacqueline Elizabeth Alema, Niguse Meles Alemu, Biresaw Wassihun Alemu, Yihun Mulugeta Alhabib, Khalid F. Alhassan, Robert Kaba Ali, Muhammad Ali, Saqib Alicandro, Gianfranco Alijanzadeh, Mehran Alinia, Cyrus Alipour, Vahid Alizade, Hesam Aljunid, Syed Mohamed Alla, François Allebeck, Peter Almadi, Majid Abdulrahman Hamad Almasi, Ali Almasi-Hashiani, Amir Almasri, Nihad A. Al-Mekhlafi, Hesham M. Almulhim, Abdulaziz M. Alonso, Jordi Al-Raddadi, Rajaa M. Altirkawi, Khalid A. Alumran, Arwa Khalid Alvis-Guzman, Nelson Alvis-Zakzuk, Nelson J. Amare, Azmeraw T. Amare, Bekalu Amini, Saeed Amini-Rarani, Mostafa Aminorroaya, Arya Amiri, Fatemeh Amit, Arianna Maever L. Amugsi, Dickson A. Amul, Gianna Gayle Herrera Anbesu, Etsay Woldu Ancuceanu, Robert Anderl Department of Juridical and Economic Studies La Sapienza University Rome Italy Department of Infectious Disease Epidemiology London School of Hygiene and Tropical Medicine London United Kingdom Social Determinants of Health Research Center Tehran Iran Department of Neurology Cairo University Cairo Egypt School of Pharmacy Tehran Iran The Institute of Pharmaceutical Sciences (TIPS) Tehran Iran Neuroscience Research Center Isfahan University of Medical Sciences Isfahan Iran Biostatistics Department Near East University Nicosia Cyprus Biostatistics and Health Informatics Madda Walabu University Bale Robe Ethiopia Research Center for Immunodeficiencies Tehran Iran Karolinska University Hospital Huddinge Sweden Department of Cardiology Dupuytren University Hospital Limoges France University of Limoges Limoges France Department of Pediatric Dentistry Federal University of Minas Gerais Belo Horizonte Brazil Department of Research Philippine Institute for Development Studies Quezon City Philippines Department of Healthcare Policy and Research Weill Cornell Medical College in Qatar Doha Qatar Harvard Medical School Boston MA United States Department of Medicine Ain Shams University Cairo Egypt Hamadan University of Medical Sciences Hamadan Iran School of Medicine Cardiff University Cardiff United Kingdom School of Laboratory Medicine and Science University College Hospital Ibadan Ibadan Nigeria Institute of Cardiovascular Diseases University of Ibadan Ibadan Nigeria Centre of Excellence for Epidemiological Modelling and Analysis Stellenbosch University Cape Town South Africa Department of Global Health Stellenbosch University Cape Town South Africa School of Health Ardabil University of Medical Science Ardabil Iran Social Behavioral Research Branch National Institute of Health Bethesda MD United States Department of Oncology Georgetown University Washington DC DC United States Department of Health Metrics Sciences School of Medicine Seattle WA

Background: In an era of shifting global agendas and expanded emphasis on non-communicable diseases and injuries along with communicable diseases, sound evidence on trends by cause at the national level is essential. The Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) provides a systematic scientific assessment of published, publicly available, and contributed data on incidence, prevalence, and mortality for a mutually exclusive and collectively exhaustive list of diseases and injuries. Methods: GBD estimates incidence, prevalence, mortality, years of life lost (YLLs), years lived with disability (YLDs), and disability-adjusted life-years (DALYs) due to 369 diseases and injuries, for two sexes, and for 204 countries and territories. Input data were extracted from censuses, household surveys, civil registration and vital statistics, disease registries, health service use, air pollution monitors, satellite imaging, disease notifications, and other sources. Cause-specific death rates and cause fractions were calculated using the Cause of Death Ensemble model and spatiotemporal Gaussian process regression. Cause-specific deaths were adjusted to match the total all-cause deaths calculated as part of the GBD population, fertility, and mortality estimates. Deaths were multiplied by standard life expectancy at each age to calculate YLLs. A Bayesian meta-regression modelling tool, DisMod-MR 2.1, was used to ensure consistency between incidence, prevalence, remission, excess mortality, and cause-specific mortality for most causes. Prevalence estimates were multiplied by disability weights for mutually exclusive sequelae of diseases and injuries to calculate YLDs. We considered results in the context of the Socio-demographic Index (SDI), a composite indicator of income per capita, years of schooling, and fertility rate in females younger than 25 years. Uncertainty intervals (UIs) were generated for every metric using the 25th and 975th ordered 1000 draw value

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A new approach of conditions on δ2s(Φ) for s-sparse recovery

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Science China(information Sciences) 2014年第4期57卷 107-113页

作者： CEN YiGang ZHAO RuiZhen MIAO ZhenJiang CEN LiHui CUI LiHong School of Computer & Information Technology Beijing Jiaotong University School of Information Science and Engineering Central South University Key Laboratory of System Control and Information Processing Ministry of Education Department of Mathematics Beijing University of Chemical Technology

In this paper,we provide a unified expression to obtain the conditions on the restricted isometry constantδ2s(Φ).These conditions cover the important results proposed by Candes et *** each of them is a sufficient condition for sparse signal *** the noiseless case,whenδ2s(Φ)satisfies any one of these conditions,the s-sparse signal can be exactly recovered via(l1)constrained minimization.

关键词： concentration of mutilated vector in kerΦ s-largest mutilated vector restricted isometry constant δ2s(Φ) exact recovery of s-sparse signals via(l1) maximum value of single variable function

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Research of segmented 8bit voltage-mode R-2R ladder DAC

Research of segmented 8bit voltage-mode R-2R ladder DAC

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International Conference on ASIC

作者： Wei Xu Runxi Zhang Chunqi Shi Institute of Microelectronics Circuit & System East China Normal University Shanghai China Shanghai Key Laboratory of Multidimensional Information Processing Shanghai China

Modeling for voltage-mode R-2R ladder digital to analog converter (DAC) is introduced in this paper. By analyzing the mismatch of resistors in ladder, the DNL and INL calculation expression are obtained. In order to achieve a higher accuracy, segmentation is used in DAC. Five different segmentation methods are compared and 3+5 segmentation structure is chosen to achieve best DNL and INL performance. For post calibration, a code-dependent current consumption expression is derived from the input impedance of R-2R ladder. A 3+5 segmented DAC based on this modeling is implemented in a standard 0.18μm CMOS process. The post simulation results show that DNL and INL are bounded at 0.30 and 0.32LSB.

关键词： Resistors Impedance Mathematical model Simulation Resistance control systems Digital-analog conversion

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Bilateral Teleoperation of Multiple Agents with Formation control

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IEEE/CAA Journal of Automatica Sinica 2014年第2期1卷 141-148页

作者： Jing Yan Xian Yang Cailian Chen Xiaoyuan Luo Xinping Guan Institute of Electrical Engineering Yanshan University Department of Automation Shanghai Jiao Tong Universityand Key Laboratory of System Control and Information ProcessingMinistry of Education of China

This paper studies the formation problem for multislave teleoperation system over general communication networks,where multiple mobile slave agents are coupled with a single master robot. The forward and backward network transmission time delays are assumed to be asymmetric and *** to the quantization in the network, a dynamic quantization strategy is provided to quantize the output signals of the master robot and slave agents before transmitting. Then, a novel masterslave protocol is designed to achieve the formation task under variable time delays and quantization. Additionally, the sufficient conditions for stability are presented to show that the formation protocol can stabilize the master-slave system under variable time delays and quantization. Finally, simulation are performed to show effectiveness of the main results.

关键词： Robots Quantization (signal) Delay effects Protocols Stability analysis Delays Multi-agent systems

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An improved genetic clustering algorithm for the multi-depot vehicle routing problem

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International Journal of Wireless and Mobile Computing 2015年第1期9卷 1-7页

作者： Xu, Degang Xiao, Renbin Key Laboratory of Grain Information Processing and Control Henan University of Technology Ministry of Education Zhengzhou China School of Automation Huazhong University of Science and Technology Wuhan China

The multi-depot vehicle routing problem (MDVRP) is a complex combinatorial problem with many real-world applications in transportation and distribution logistics. This paper considers not only the minimum distance required to deliver goods, but also the workload imbalance in terms of the distances travelled by the used vehicles and their loads. Thus, a new type of geometric shape based genetic clustering algorithm is proposed. A genetic algorithm based on this clustering technique is developed for the solution process of the multi-objective formulations of the MDVRP. A set of problems obtained from the literature is used to compare the efficiency of the proposed algorithm with the nearest neighbour algorithm so as to solve it. The computational experiments on data sets illustrate the efficiency and effectiveness of the proposed approach. © 2015 Inderscience Enterprises Ltd.

关键词： Genetic algorithms

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Comparison of Four Text Classifiers on Movie Reviews

Comparison of Four Text Classifiers on Movie Reviews

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International Conference on Applied Computing and information Technology/International Conference on Computational Science and Intelligence (ACIT-CSI)

作者： Yaguang Wang Wenlong Fu Aina Sui Yuqing Ding Information Engineering School Communication University of China Ministry of Culture Key Laboratory of Acoustic Visual Technology and Intelligent Control System

ISBN: (纸本)9781467396431

Text Categorization plays an important role in the fields of information retrieval, machine learning, natural language processing, data mining and others. With the development of computer and information technology, there have been many classification algorithms. Each text classification algorithms will get result at differing speeds and efficiency due to the various feature of test text. It has been found that Naive Bayes classifier has a higher accuracy and rate by classifying Movie Reviews in NLTK using Decision Tree classifier, Naive Bayes classifier, Maximum Entropy classifier and K-nearest neighbor classifier.

关键词： Entropy Classification algorithms Decision trees Text categorization Accuracy Motion pictures Training

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