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IEEE Global Conference on Signal and Information Processing (GlobalSIP)

作者： Manxi Wang Yongcheng Li Xiaohan Wei Qing Ling State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System Luoyang China Department of Automation University of Science and Technology of China Hefei China Department of Electrical Engineering University of Southern California Los Angeles USA

ISBN: (纸本)9781509045464

This paper considers the recovery of group sparse signals over a multi-agent network, where the measurements are subject to sparse errors. We first investigate the robust group LASSO model and its centralized algorithm based on the alternating direction method of multipliers (ADMM), which requires a central fusion center to compute a global row-support detector. To implement it in a decentralized network environment, we then adopt dynamic average consensus strategies that enable dynamic tracking of the global row-support detector. Numerical experiments demonstrate the effectiveness of the proposed algorithms.

关键词： Robustness Sparse matrices Detectors Mathematical model Pollution measurement Measurement uncertainty Lagrangian functions

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Preconcentration of organic solutes in urine by bubble bursting

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Metabolomics 2016年第11期12卷 1-8页

作者： Konstantin Chingin Yunfeng Cai Vitaliy Chagovets Alexey Kononikhin Natalia Starodubtseva Vladimir Frankevich Huanwen Chen Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation East China University of Technology Nanchang China Department of System Biology in Reproduction Federal State Budget Institution “Research Center for Obstetrics Gynecology and Perinatology” Moscow Russia Moscow Institute of Physics and Technology Moscow Russia

The chemical sensitivity of urine metabolomics analysis is greatly compromised due to the large amounts of inorganic salts in urine (NaCl, KCl), which are detrimental to analytical instrumentation, e.g. chromatographic columns or mass spectrometers. Traditional desalting approaches applied to urine pretreatment suffer from the chemical losses, which reduce the information depth of analysis. We aimed to test a simple approach for the simultaneous preconcentration and desalting of organic solutes in urine based on the collection of induced bursting bubble aerosols above the surface of urine samples. Bursting bubbles were generated at ambient conditions by feeding gas through an air diffuser at the bottom of diluted (200 times in ultrapure water) urine solution (50–500 mL). Collected aerosols were analyzed by the direct-infusion electrospray ionization mass spectrometry (ESI–MS). The simultaneous preconcentration (ca. 6–12 fold) and desalting (ca. six–tenfold) of organic solutes in urine was achieved by the bursting bubble sample pretreatment, which allowed ca. three-times higher number of identified urine metabolites by high-resolution MS analysis. No chemical losses due to bubbling were observed. The increased degree of MS data clustering was demonstrated on the principal component analysis of data sets from the urine of healthy people and from the urine people with renal insufficiency. At least ten times higher sensitivity of trace drug detection in urine was demonstrated for clenbuterol and salbutamol. Our results indicate the high versatility of bubble bursting as a simple pretreatment approach to enhance the chemical depth and sensitivity of urine analysis. The approach could be attractive for personalized medicine as well as for the diagnostics of renal disorders of different etiology (diabetic nephropathy, chronic renal failure, transplant-associated complications, oncological disorders). Urine desalting and preconcentration in bursting bubbles.

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Path Loss Modeling and Fading Analysis for Channels with Various Antenna Setups in Tunnels at 30 GHz Band

Path Loss Modeling and Fading Analysis for Channels with Var...

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European Conference on Antennas and Propagation

作者： Guangkai Li Bo Ai Ke Guan Ruisi He Zhangdui Zhong Li Tiar Jianwu Dou State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University 100044 Beijing China Wireless Algorithm Department Product R&D system ZTE corporation 201210 Shanghai China

ISBN: (纸本)9781509022342

The high-speed railway (HSR) environment has unique characteristics in radio propagation. The research on radio channel in HSR plays a vital role in system design, especially for advanced mobile systems working in the millimetre-wave band. This paper presents the simulation in a typical straight and arched tunnel at 30 GHz band with a verified ray-tracing tool. The simulation results illustrate that the advanced mobile communication system with high gain directional antennas can support longer than 1 km communication links in the tunnel. In this paper, the channel characteristics of three different antenna setups are compared at frequencies ranging from 31.5 GHz~33.5 GHz, e.g., path loss exponent, autocorrelation and decorrelation distance of shadow fading, etc. Additionally, these characteristics will be shown with statistic values that can easily reproduce the radio channel properties. Furthermore, the results will be utilized to guide further realistic measurement campaign and physical layer design for advanced mobile communication systems.

关键词： Channel characteristics millimetre-wave raytracing subway tunnel

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Polarization Projection for 3D Geometry-Based Stochastic Channel Model

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China Communications 2015年第10期12卷 52-63页

作者： PANG Lihua ZHANG Yang GONG Fengkui WANG Anyi XIAO Liyuan LIANG Xiao WANG Qiaofeng LI Jiandong School of Information Engineering Xi'an University of Science and Technology State Key Laboratory of Integrated Service Networks Xidian University National Mobile Communications Research Laboratory Southeast University Service Development Center State Commission Office for Public Sector Reform System Simulation Department ZTE Corporation

Comprehensive radiation characteristics of polarized antenna are crucial in creating practical channel coefficients for next generation wireless communication system *** currently supported within3 D geometry-based stochastic channel models(GSCM),field patterns are technically obtained by chamber measurement(or by its best fitting).However,in some channel related performance analysis scenarios,design insight can be crystallized better by starting the derivations with theoretical co-polarization and cross-polarization ***,these two components are mathematically linked with field patterns through the proposed polarization projection *** this manuscript,we focus on revealing the transformation criterion of polarization states between the antenna plane and the propagation *** practice,it makes retrieving the field patterns by electromagnetic computation ***,the impact imposed by distinct antenna orientations is geometrically illustrated and consequently incorporated into the proposed *** will further facilitate flexible performance evaluation of related radio transmission *** conclusions are verified by the closed-form expression of the dipole field pattern(via an analytical approach) and by chamber measurement ***,we find that its 2D degenerative case is aligned with the definitions in 3^(rd) generation partnership project(3GPP)technical report *** most obvious benefit of the proposed algorithm is to significantly reduce the cost on generating channel coefficients in GSCM simulation.

关键词： polarization 3D geometry-based stochastic channel model antenna orientation radiation characteristics dipole chamber measurement channel simulation

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Vision-Based Cylinder Posture Recognition and On-line Adjustment Strategy

Vision-Based Cylinder Posture Recognition and On-line Adjust...

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International Conference on Mechanical Engineering, Automation and Control systems

作者： Congying Sui Yanjie Liu Haijun Han State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin China 1State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin China

ISBN: (纸本)9781467381154

Vision-based micromanipulation robots are now widely used in the field of industry, military, biology, etc. for their minimized size, low energy consumption and reliable performance. This paper presents a cylinder's axis extraction method for the foam column assembly system through image processing and feature recognition. A novel image Jacobian matrix estimation method based on Broyden update for uncalibrated visual servo system is proposed to adjust the posture of the foam column online, then its simulation model is established and tested by typical signals and the results demonstrate the effectiveness of the method.

关键词： Image feature recognition on-line posture adjustment Image Jacobian matrix Broyden update

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An under-actuated manipulation controller based on Workspace Analysis and Gaussian Processes

An under-actuated manipulation controller based on Workspace...

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IEEE/RSJ International Conference on Intelligent Robots and systems

作者： Fan Zhang Yanyu Su Xiang Zhang Wei Dong Zhijiang Du State Key Laboratory of Robotics and System Harbin Institute of Technology China

The kinematic modelling has been applied to many controllers of under-actuated manipulators. Most of these studies assume that the control process is conducted within the workspace. However, as such a kinematic model cannot describe the situations when the stable grasping is violated in the real environment, these controllers may fail unexpectedly. In this paper, we propose a combination of kinematics based Workspace Analysis (WA) and Gaussian Process Classification (GPC) to model the success rates of control actions in the theoretical workspace. We also use the Gaussian Process Regression (GPR) to model the residual between the prediction of the WA and the ground truth data. We then apply this integrated model, Gaussian Processes enhanced Workspace Analysis (GP-WA), into an optimal controller. The optimal controller is implemented on a planar under-actuated gripper with two three-phalanx fingers. Two sets of simulation experiments are carried out to validate our method. The results demonstrate that the optimal manipulation controller based on GP-WA achieves high control accuracy for manipulating a wide range of objects.

关键词： Kinematics Actuators Gaussian processes Analytical models Ground penetrating radar Tendons Force

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A novel method to analyze NO2 and PM2.5 spatiotemporal variability over Eastern China

A novel method to analyze NO2 and PM2.5 spatiotemporal varia...

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第22届中国大气环境科学与技术大会暨中国环境科学学会大气环境分会2016年学术年会

作者： M.-Y.Liu J.-T.Lin Y.-C.Wang Y.Sun B.Zheng J.-Y.Shao J.-X.Cheng Z.-H.Wu Y.-Y.Yan Y-Y.Zheng Laboratory for Climate and Ocean-Atmosphere Studies Department of Atmospheric and Oceanic SciencesS Institute of Atmospheric Physics Chinese Academy of Sciences Ministry of Education Key Laboratory for Earth System Modeling Center for Earth System ScienceTsing Center for Ocean-Atmospheric Prediction Studies Florida State UniversityTallahasseeFlorida 32306-2

Over Eastern China(consist of Southern Eastern China and Northern East China),nitrogen dioxide(NO2),particulate matters with diameter less than 2.5 μm(PM2.5)and other air pollutants vary significantly in space and un... 详细信息

关键词： NO2 PM2.5 spatiotemporal variation Eastern China Surface observation

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Modeling and vibration decoupling control of multi-axial shaking table

Modeling and vibration decoupling control of multi-axial sha...

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2015 International Industrial Informatics and Computer Engineering Conference(IIICEC 2015)

作者： Zhang Lianpeng Yang Zhidong Qu Zhiyong Han Junwei National State Key Laboratory of Robotics and System Harbin Institute of Technology

Traditional control strategy study of the multi-axial electro-hydraulic shaking table(MAEHST) is based on linear model,ignoring the coupling and nonlinearity factors,which results in the waveform distortion and the control *** overcome these limitations,a model considering the hydraulic system nonlinearity and mechanical coupling using the software Simulink/Sim Mechanics is built.A vibration decoupling control strategy based on multiple input multiple output(MIMO) system identification is proposed to improve the waveform replication *** proposed control method applies the MIMO H1 estimator to identify frequency response function matrix(FRFM) of the system,not only considering the diagonal element,but the off-diagonal element to acquire the coupling characteristics of six degrees of freedom(DOFs) of *** then the inverse frequency response function matrix(IFRFM) is calculated using the singular value decomposition technique to obtain the drive signal combined with the reference *** experiments are carried out,and the results indicate that the MIMO vibration decoupling control strategy successfully minimizes the coupling and improve the waveform replication precision of the shaking table.

关键词： electro-hydraulic shake table waveform replication decoupling control frequency response function matrix singular value decomposition

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Research on Establishment and Validation of Cutting Force Prediction Model for Bone Milling

Research on Establishment and Validation of Cutting Force Pr...

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IEEE International Conference on robotics and Biomimetics

作者： Dongmei Wu Longzhi Zhang Sen Liu State Key Laboratory of Robotics and System Harbin Institute of Technology China

ISBN: (纸本)9781467396769

Bone cutting process is an essential and crucial step during orthopedic surgery, a slight error could injure spinal cord and nerve root, causing limb dysfunction. Cutting surface quality direct affect whether artificial prosthesis is fit for the bone, also, injury during cutting will restrict postoperative rehabilitation greatly. Cutting force changes causes cutting surface cracks, affect artificial joints stability and postoperative rehabilitation. Therefore, to predict and control cutting force in bone milling, we utilize the least squares multiple regression algorithm to construct a prediction model for cutting force, experiments prove that model can be effectively applied to predict and control cutting force.

关键词： essential during orthopedic cutting force

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An optimization method for metamorphic mechanisms based on multidisciplinary design optimization

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Chinese Journal of Aeronautics 2014年第6期27卷 1612-1618页

作者： Zhang Wuxiang Wu Teng Ding Xilun State Key Laboratory of Robotics and System Harbin Institute of Technology Institute of Robotics Beihang University

The optimization of metamorphic mechanisms is different from that of the conventional mechanisms for its characteristics of multi-configuration. There exist complex coupled design variables and constraints in its multiple different configuration optimization models. To achieve the compatible optimized results of these coupled design variables, an optimization method for metamorphic mechanisms is developed in the paper based on the principle of multidisciplinary design optimization（MDO）. Firstly, the optimization characteristics of the metamorphic mechanism are summarized distinctly by proposing the classification of design variables and constraints as well as coupling interactions among its different configuration optimization models. Further, collaborative optimization technique which is used in MDO is adopted for achieving the overall optimization performance. The whole optimization process is then proposed by constructing a two-level hierarchical scheme with global optimizer and configuration optimizer loops. The method is demonstrated by optimizing a planar five-bar metamorphic mechanism which has two configurations,and results show that it can achieve coordinated optimization results for the same parameters in different configuration optimization models.

关键词： Configuration Mechanism Metamorphic mechanisms Method Multidisciplinary design optimization Optimization model

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