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Gravitational wave astronomy: the current status

Science China(Physics,Mechanics & Astronomy) 2015年第12期58卷 3-43页

作者： BLAIR David JU Li ZHAO ChunNong WEN LinQing CHU Qi FANG Qi CAI RongGen GAO JiangRui LIN XueChun LIU Dong WU Ling-An ZHU ZongHong REITZE David H. ARAI Koji ZHANG Fan FLAMINIO Raffaele ZHU XingJiang HOBBS George MANCHESTER Richard N. SHANNON Ryan M. BACCIGALUPI Carlo GAO Wei XU Peng BIAN Xing CAO ZhouJian CHANG ZiJing DONG Peng GONG XueFei HUANG ShuangLin JU Peng LUO ZiRen QIANG Li'E TANG WenLin WAN XiaoYun WANG Yue XU ShengNian ZANG YunLong ZHANG HaiPeng LAU Yun-Kau NI Wei-Tou School of Physics The University of Western Australia State Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences The School of Physics & Electronic Engineering Shanxi University Laboratory of All-Solid-State Light Sources Institute of Semiconductors Chinese Academy of Science State Key Laboratroy of Modern Optical Instrumentation Department of Optical Engineering Zhejiang University Laboratory of Optical Physics Institute of Physics Chinese Academy of Sciences Gravitational Wave and Cosmology Laboratory Department of Astronomy Beijing Normal University LIGO Laboratory California Institute of Technology Department of Physics University of Florida Department of Physics West Virginia University National Astronomical Observatory of Japan CSIRO Astronomy and Space Science International Centre for Radio Astronomy Research Curtin University SISSA Astrophysics Sector Institute of Applied Mathematics Academy of Mathematics and Systems Science Chinese Academy of Sciences University of Chinese Academy of Sciences Morningside Center of Mathematics Chinese Academy of Sciences State Key Laboratory of Scientific and Engineering Computing Academy of Mathematics and Systems ScienceChinese Academy of Sciences Department of Mathematics Henan University Department of Mathematics Capital Normal University Department of Geophysics College of the Geology Engineering and Geomatics Chang'an University QUEST Centre of Quantum Engineering and Space-Time Research Leibniz Universitt Hannover Max-Planck-Institut für Gravitationsphysik(Albert Einstein Institut) Aerospace Flight Dynamics Laboratory Beijing Aerospace Control Center Qian Xuesen Laboratory of Launch Vehicle Technology Center for Gravitation and Cosmology Department of Physics Tsing Hua University

In the centenary year of Einstein's General Theory of Relativity, this paper reviews the current status of gravitational wave astronomy across a spectrum which stretches from attohertz to kilohertz frequencies. Sect. 1 of this paper reviews the historical development of gravitational wave astronomy from Einstein's first prediction to our current understanding the spectrum. It is shown that detection of signals in the audio frequency spectrum can be expected very soon, and that a north-south pair of next generation detectors would provide large scientific benefits. Sect. 2 reviews the theory of gravitational waves and the principles of detection using laser interferometry. The state of the art Advanced LIGO detectors are then described. These detectors have a high chance of detecting the first events in the near future. Sect. 3 reviews the KAGRA detector currently under development in Japan,which will be the first laser interferometer detector to use cryogenic test masses. Sect. 4 of this paper reviews gravitational wave detection in the nanohertz frequency band using the technique of pulsar timing. Sect. 5 reviews the status of gravitational wave detection in the attohertz frequency band, detectable in the polarisation of the cosmic microwave background, and discusses the prospects for detection of primordial waves from the big bang. The techniques described in sects. 1–5 have already placed significant limits on the strength of gravitational wave sources. Sects. 6 and 7 review ambitious plans for future space based gravitational wave detectors in the millihertz frequency band. Sect. 6 presents a roadmap for development of space based gravitational wave detectors by China while sect. 7 discusses a key enabling technology for space interferometry known as time delay interferometry.

关键词： gravitational waves ground based detectors pulsar timing spaced based detectors CMB

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H_∞ group consensus for clusters of agents with model uncertainty and external disturbance

H_∞ group consensus for clusters of agents with model uncer...

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IEEE Annual Conference on Decision and control

作者： Jiahu Qin Qichao Ma Wei Xing Zheng Huijun Gao Department of Automation University of Science and Technology of China Hefei 230027 China School of Computing Engineering and Mathematics Western Sydney University Sydney NSW 2751 Australia Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin 150001 China

ISBN: (纸本)9781479978878

In this paper, the problem of H_∞ group consensus is addressed for networks of agents modeled by single-integrator with model uncertainty and external disturbance. The first part of the work is to show that the group consensus with desired H_∞ performance can be achieved under some sufficient conditions that are established in terms of the structure and strength of the couplings among agents. Then given the observation that the theoretical values of the coupling strengths are usually much larger than expected in practical situations, the second part of the work is concerned with developing an adaptation law to tackle such coupling strength problem.

关键词： model uncertainty external disturbance Agents theoretical value Couplings Sufficient conditions

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Interval type-2 fuzzy-model-based control design for time-delay systems under imperfect premise matching

Interval type-2 fuzzy-model-based control design for time-de...

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IEEE International Conference on Fuzzy systems (FUZZ-IEEE)

作者： Yuandi Li H. K. Lam Lixian Zhang Hongyi Li Fucai Liu Shun-Hung Tsai Department of Informatics King's College London United Kingdom Institute of Electrical Engineering Yanshan University Qinhuangdao China Research Center of Intelligent Control and Systems Harbin Institute of Technology Harbin China College of Engineering Bohai University Jinzhou China Graduate Institute of Automation Technology National Taipei University of Technology Taipei Taiwan

In this paper, the problems of stabilization for interval type-2 fuzzy systems with time-varying delay and parameter uncertainties are investigated. The objective is to design an interval type-2 fuzzy controller such that the closed-loop control system is asymptotically stable. The conditions for the existence of such a controller are delay dependent and membership function dependent in terms of linear matrix inequalities (LMIs). Based on a basic lemma, we formulate and solve the problem with more flexibility due to imperfect premise matching that the number of rules and premise membership functions are not necessary the same between the interval type-2 fuzzy model and interval type-2 fuzzy controller. A systematic approach making use of the information embedded in the lower and upper membership functions is employed to facilitate the stability analysis. A numerical example indicates the effectiveness of the derived results.

关键词： Gold

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The Chinese ‘‘HumanFlesh’’ Web:the first decade and beyond

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Chinese Science Bulletin 2014年第26期59卷 3352-3361页

作者： Fei-Yue Wang Daniel Zeng Qingpeng Zhang James A. Hendler Jianping Cao The State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Department of Management Information Systems The University of Arizona Tucson Department of Systems Engineering and Engineering Management City University of Hong Kong Tetherless World Constellation Department of Computer Science Rensselaer Polytechnic Institute Troy The Research Center for Computational Experiments and Parallel Systems National University of Defense Technology

Human flesh search(HFS), a Web-enabled crowdsourcing phenomenon, originated in China a decade ago. In this article, we present the first comprehensive empirical analysis of HFS, focusing on the scope of HFS activities, the patterns of HFS crowd collaboration process, and the characteristics of HFS participant networks. A survey of HFS participants was conducted to provide an in-depth understanding of the HFS community and various factors that motivate these participants to contribute. This article also advocates a new stream of Web science and social computing research that will be important in predicting the future growth and use of the World Wide Web.

关键词：中国人网址肉 Web功能实证分析参与者共同体万维网

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Tumor Cell Detection Device Based on Surface Plasmon Resonance Imaging and Image Processing

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Chemical research in Chinese Universities 2014年第2期30卷 211-215页

作者： YANG Mengchao JIN Xinyu YUAN Maokai LIU Fan LANG Yicong WU Zhongyu XIANG Liancheng ZHOU Chao OUYANG Bo JIN Wei MU Ying Research Center for Analytical Instrumentation Institute of Cyber-systems and Control State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou 310058 P.R.China Department of Information Science & Electronic Engineering Zhejiang UniversityHangzhou 310027 P.R.China

A laboratory-made tumor cell detection device was fabricated based on both surface plasmon resonance imaging（SPRi） and image *** this device,a gravity-induced flow injection chip（gFIC） was exploited to replace a *** two charge coupled devices（CCDs） were used to detect HepG2 cells by SPRi and image processing,*** results of two CCDs are *** A was used to modify the sensing *** inlet angle was carefully adjusted for the device to get an enhanced *** the test,the contrast among cell solutions at different concentrations can be easily *** other CCD using image processing can tell false-positive in some *** detection is label-free,real time,and precise.

关键词： Surface plasmon resonance Image processing Tumor detection Gravity induced

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Coordination control for generic linear multi-agent systems with time delay: a semi-discretization approach

Coordination control for generic linear multi-agent systems ...

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IEEE Annual Conference on Decision and control

作者： Jiahu Qin Jie Sheng Huijun Gao Wei Xing Zheng Department of Automation University of Science and Technology of China Hefei 230027 P. R. China Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin 150001 P. R. China School of Computing Engineering and Mathematics Western Sydney University Sydney NSW 2751 Australia

ISBN: (纸本)9781479978878

This paper aims to perform the convergence analysis for a group of linear multi-agent systems with time delay and communicating over arbitrary network topology. It is proved that within the allowable delay bound, all the agents within each closed strong component reach synchronization, while all the other agents outside the closed strong components converge to the dynamic convex hull spanned by the agents in the closed strong components. The delay bound is calculated by the method of semi-discretization, which is also useful in searching for an optimal feedback control with the fastest convergence rate for a certain time delay. A simulation example is given to illustrate the validity of the obtained results.

关键词： coordinated control Network topology Agents system clock optimal feedback control Converge convex hull COMMUNICATING

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Observations of the interaction forces between a measurement surface and a vibrating probe for a micro-scale CMM 14

Observations of the interaction forces between a measurement...

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14th International Conference of the European Society for Precision engineering and Nanotechnology, EUSPEN 2014

作者： Hong, Daewoong Choi, Young-Man Jeong, Jaehwa Department of Control and Instrumentation Engineering Korea Univ. Korea Republic of Department of Printed Electronics Advanced Manufacturing Systems Research Division Korea Institute of Machinery and Materials Korea Republic of

ISBN: (纸本)9780956679031

The vibrating micro-CMM probe is a most promising probe to overcome drawbacks of the conventional tactile probe caused by surface interaction forces. The vibrating probe which consists of flexures, a stylus, and a tip-sphere, operates at its resonance frequency, and its phase and amplitude which can provide surface contact information is changed as it approaches to the measurement surface. This probe can measure the surface geometry with significantly low contact force, and counteract the attractive forces existing between the probe tip and a measured surface. We observed variations of the phase and amplitude of the vibrating probe caused by the interaction forces for the vertical proximity. We also investigated the condition to counteract the attractive forces which are causing the snap-in effect.

关键词： Probes

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Distributed parameter modeling of single-mast stacker crane structures

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Periodica Polytechnica Transportation engineering 2014年第1期42卷 1-9页

作者： Hajdu, Sándor Gáspár, Péter Department of Mechanical Engineering University of Debrecen Ótemeto u. 2-4. H-4028 Debrecen Hungary Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Kende u. 13-17 H-1111 Budapest Hungary

This paper presents distributed parameter dynamical modeling capabilities of single-mast stacker crane structures. In the frame structure of stacker cranes due to external excitation or inertial forces undesirable structural vibrations may arise. These vibrations reduce the stability and positioning accuracy of stacker crane and causes increasing cycle time of storage/ retrieval operation. Thus it is necessary to investigate of these vibrations. In this paper the dynamical behavior of single-mast stacker cranes is approximated by means of distributed parameter models. The first model is a cantilever beam model with uniform material and cross-sectional properties. This model is used to demonstrate fundamental properties of Euler-Bernoulli beam models. The second model is cantilever beam model with variable cross-sectional properties and lumped masses. The eigenfrequencies and mode shapes of this mast-model are determined by means transfer matrix method. In the third model the whole structure of single-mast stacker crane is modeled. Beside the eigenfrequencies and mode shapes of this model the Bodediagrams of frequency response function is also calculated.

关键词： Cantilever beams

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Synchronising second-order multi-agent systems under dynamic topology via reference model-based algorithm

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Journal of control and Decision 2014年第3期1卷 214-225页

作者： Jiahu Qin Huijun Gao Tasawar Hayat Fuad E.Alsaadi Department of Automation University of Science and Technology of ChinaHefeiChina Research School of Engineering Australian National UniversityCanberraAustralia Research Institute of Intelligent Control and Systems Harbin Institute of TechnologyHarbinChina Nonlinear Analysis and Applied Mathematics Group King Abdulaziz University(KAU)JeddahSaudi Arabia Faculty of Engineering Department of Electrical and Computer EngineeringKing Abdulaziz UniversityJeddahSaudi Arabia Department of Mathematics Quaid-I-Azam UniversityIslamabadPakistan

This paper revisits the synchronisation problem for second-order multi-agent systems(MASs)under dynamically changing communication *** employing the reference model-based synchronisation algorithm,it is finally shown that synchronisation for both the position and velocity states can be achieved if the union of the communication topologies has a directed spanning tree frequently *** extends the existing results obtained for second-order MASs which exploits mild communication topology condition guaranteeing the synchronisation to a more general *** analysis is successfully performed by exploiting the product properties of row-stochastic matrices,which can also provide us with an estimate the convergence rate towards the synchronisation.

关键词： synchronisation double-integrator agents weakest possible communication topology rate of convergence

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A novel microfluidic chip with CCD-based fluorescence imaging for digital PCR

A novel microfluidic chip with CCD-based fluorescence imagin...

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2014 2nd International Conference on Biomedical engineering and Environmental engineering(ICBEEE 2014)

作者： Maokai Yuan Wei Jin Zhiyu Wang Yanan Xu Ying Mu Research Center for Analytical Instrumentation Institute of Cyber-Systems and Control Department of Control Science and EngineeringThe State Key Laboratory of Industrial Control TechnologyZhejiang University

Previously,our group developed a novel Self-Priming Compartmentalization(SPC) microfluidic *** has good performance at the sample injection speed and the uniform of the sample discretization,and it is very *** it becomes a good reaction platform for digital Polymerase Chain Reaction(PCR).The unique sample injection method promotes the development of microfluidic chip ***,it puts forward more requirements on the fluorescence detection *** this work,we develop a fluorescence detection system based on CCD and *** realizes the function of image capture,processing and the resulting calculation for digital PCR on SPC *** the other hand,we apply the Sobel algorithm to the image processing,which improves the quality of edge extraction,and improves the anti-noise property of the *** control experiment shows that for the same chip,our system has the equivalent result as the commercial imaging device(Maestro Ex IN-VIVO IMAGING SYSTEM),which needs manual calculation for the targeted DNA copies after taking *** proves the effectiveness of our self-developed microfluidic chip fluorescence detection system.

关键词： SPC A novel microfluidic chip with CCD-based fluorescence imaging for digital PCR CCD

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