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Joint tracking and classification of extended targets with complex shapes Research Articles
Liping Wang, Ronghui Zhan, Yuan Huang, Jun Zhang, Zhaowen Zhuang,zhanrh@nudt.edu.cn
Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 6, Pages 839-861 doi: 10.1631/FITEE.2000061
Keywords： 扩展目标；傅里叶描述子；联合跟踪与分类；随机超曲面模型；伯努利滤波器
Multi－target Tracking Algorithm for Multi－static Radar SystemBased on Parallel Processing Mechanism
Xu Hongkui,Wang Dongjin,Chen Weidong
Strategic Study of CAE 2007, Volume 9, Issue 11, Pages 151-156
To investigate the problem of tracking multiple short range high speed maneuvering targets with multi- static radar system, a tracking algorithm based on parallel processing mechanism is derived. The whole measurement association course was divided into some parallel sub-courses, moreover, an established target's tracking course is separated into two parallel3-D sub-courses which execute iterative filtering processes with synthetic distance-sum and Doppler velocity. Simulation results show that the algorithm can accurately track multiple maneuvering targets in clutter with fast speed. Meanwhile, it has good convergence and stability.
Keywords： multi-static radar system multi-target tracking parallel processing MSJPDA parallel extendedkalman filtering
Performance analysis of two EM-based measurement bias estimation processes for tracking systems None
Zhi-hua LU, Meng-yao ZHU, Qing-wei YE, Yu ZHOU
Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 9, Pages 1151-1165 doi: 10.1631/FITEE.1800214
In target tracking, the measurements collected by sensors can be biased in some real scenarios, e.g., due to systematic error. To accurately estimate the target trajectory, it is essential that the measurement bias be identified in the first place. We investigate the iterative bias estimation process based on the expectation-maximization (EM) algorithm, for cases where sufficiently large numbers of measurements are at hand. With the assistance of extended Kalman filtering and smoothing, we derive two EM estimation processes to estimate the measurement bias which is formulated as a random variable in one state-space model and a constant value in another. More importantly, we theoretically derive the global convergence result of the EM-based measurement bias estimation and reveal the link between the two proposed EM estimation processes in the respective state-space models. It is found that the bias estimate in the second state-space model is more accurate and of less complexity. Furthermore, the EM-based iterative estimation converges faster in the second state-space model than in the first one. As a byproduct, the target trajectory can be simultaneously estimated with the measurement bias, after processing a batch of measurements. These results are confirmed by our simulations.
Keywords： Non-linear state-space model Measurement bias Extended Kalman filter Extended Kalman smoothing Expectation-maximization (EM) algorithm
Research on Prony’s method modeling in multi-target detection of stepped-frequency radar
Hu Tiling,Li Xingguo
Strategic Study of CAE 2008, Volume 10, Issue 10, Pages 67-71
Stepped-frequency signal is a broad band signal which enhances range resolution of radar at the cost of increasing bandwidth. Baseband signal that is received in stepped-frequency radar can be thought of as the linear combination of exponential function which contains target information, while Prony algorithm is a mathematical mode which uses a linear combination of exponential function to describe equal space between sampling data. Extended Prony algorithm is applied to stepped-frequency radar, which can obtain more exact target information and overcome the shortcomings of using IDFT to synthesize high resolution range profiles. Corresponding modeling analysis and experiment simulation explain the advantages of Prony's method.
Keywords： high resolution radar stepped-frequency signal extended Prony’s method multi-scattering center
Extended Hemispherical Lens and Its Applications in Millimeter Wave Focal Imaging Systems
Sun Zhongliang,Dou Wenbin
Strategic Study of CAE 2000, Volume 2, Issue 3, Pages 42-47
Recently millimeter wave imaging absorbs many attentions. Especially much research work has been done on the millimeter focal imaging because of its advantage of real time imaging. This paper analyzes extended hemispherical lens, which can be used in focal imaging. An integrated antenna array is placed at the back plane of the lens to receive the power focused by the lens. This structure can eliminate the effect of the surface wave exited in the thick dielectric substrates at millimeter wave wavelengths. Low loss and compact are its merit. Assuming an electromagnetic wave is incident on the lens surface, the field distribution in focal space of the lens is analyzed by using Stratton-Chu formula and ray tracing method. It will provide much information about the imaging performance of the lens. Experiments have been carried out for two types of incident waves, one is normally incident plane wave and another is Gaussian-beam. Good agreement has been found between experiments and calculation results. The lens antenna also can be used to eliminate the transition between paraboloidal antenna and integrated front-end in conventional integrated millimeter wave systems so that the system loss can be decreased and performance can be improved. Furthermore, the lens can be used to couple with a quasi-optical system. The results presented here will provide useful guidelines for the above mentioned applications.
Keywords： millimeter waves antennas imaging extended hemispherical lens
Xiang Xiaodong
Strategic Study of CAE 2008, Volume 10, Issue 11, Pages 89-92
According to the theory that the present data contains more future information than historical data in time-series,the paper extends the prediction method of least square support vector machine and obtains a more general prediction model of least square support vector machine,and develops algorithm of the extended prediction model.Prediction examples of two time-series show that the extended model is more effective.Therefore it improves the value of the prediction method of least square support vector machine.
Keywords： least square support vector machine generalization time series forecasting
Active Virtual Server and a Novel Mechanism for Data Integration over Internet
He Xingui,Yang Lianghuai,Tang Shiwei,Yang Dongqing,Chen Lijun,Zhang Zhen,Lin Bin
Strategic Study of CAE 2001, Volume 3, Issue 5, Pages 55-60
Aiming at solving the problems of information retrieval and data integration over Internet, the idea of “active virtual server” is proposed, and a novel mechanism for data integration based on the virtual server is presented. Active virtual servers can be regarded as the uniform storage and processor of massive data over Internet, with the function of active services. By only using a unified extendable language (UXL) to wrap each kind of server with a uniform interface “active service coat”，the “active virtual server” can be constructed as needed without changing the original DBMS on the server. The above “coat” needs to be done only once for each kind of server, and can be exploited uniformly all over the Internet, hence it plays the role as Java Virtual Machine does.
Keywords： active virtual server data integration extendable markup language (XML) unified extendable (UXL) information agent
An efficient wear-leveling-aware multi-grained allocator for persistent memory file systems Research Article
Tao CAI, Pengfei GAO, Dejiao NIU, Yueming MA, Tianle LEI, Jianfei DAI,caitao@ujs.edu.cn,1306943800@qq.com
Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 5, Pages 703-715 doi: 10.1631/FITEE.2200462
Keywords： Extendible hashing Non-volatile memory (NVM) High concurrency
Detecting slowlymoving infrared targets using temporal filtering and association strategy Article
Jing-li GAO,Cheng-lin WEN,Zhe-jing BAO,Mei-qin LIU
Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 11, Pages 1176-1185 doi: 10.1631/FITEE.1601203
Keywords： Temporal target detection Slowly moving targets Graph matching Target association
Multiobjective Decision Making Theory and Model for Floodcontrol Operation
Chen Shouyu
Strategic Study of CAE 2000, Volume 2, Issue 2, Pages 47-52
Analyzing the status of floodcontrol operation in china, this paper sumarized decision making problems of floodcontrol and proposed multiobjective decision making theory, model and methods. These include some new achievements such as multiobjective fuzzy optimum seeking theory and model for multilayer system ,definition of objective weight etc. some of the theory and model were applied to reservoirs floodcontrol operations and satisfactory results were achieved.
Keywords： Floodcontrol operation decision making multiobjective objective weight
Xiaoping Zhang, Qi Zhang, Quansheng Liu, Ruihua Xiao
Engineering 2022, Volume 17, Issue 10, Pages 140-150 doi: 10.1016/j.eng.2021.09.023
An earthquake is usually followed by a considerable number of aftershocks that play a significant role in earthquake-induced landslides. During the aftershock, the cracking process in rocks becomes more complex because of the formation of faults. In order to investigate the effects of seismic loading on the cracking processes in a specimen containing a single flaw, a numerical approach based on the bonded-particle model (BPM) was adopted to study the seismic loading applied in two orthogonal directions. The results reveal that no transmission and reflection phenomena were observable in the small specimens (76 mm × 152 mm) because they were considerably smaller than the wavelength of the P-wave. Furthermore, under seismic loading, the induced crack was solely tensile in nature. Repeated axial seismic loading did not induce crack propagation after the first axial seismic loading. Cracks began to propagate only when the seismic loading direction was changed from axial to lateral, and then back to axial, ultimately resulting in the failure of the specimen.
Keywords： Seismic wave Cyclic loading Cracking processes Bonded-particle model
Enhanced collection of scattered photons in nonlinear fluorescence microscopy by extended epi-detection with a silicon photomultiplier array Research Articles
Ruheng Shi, Cheng Jin, Chi Liu, Lingjie Kong,konglj@tsinghua.edu.cn
Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 10, Pages 1289-1298 doi: 10.1631/FITEE.2000410
Keywords： 扩展背向探测；增强探测；非线性荧光显微镜；硅光电倍增管阵列
Surface Ship Target Recognition Research Based on SGA
Jiang Dingding,Xu Zhaolin,Li Kairui
Strategic Study of CAE 2004, Volume 6, Issue 8, Pages 79-81
Surface ship recognition is an important contents of navy's aviation probe. This text discussed the principle, characteristics and calculating step of SGA, and applied this calculating way to surface ship recognition. The experiment results proved the scientificalness and the practical applicability of that methoded.
Keywords： SGA target recognition surface ship
Research of HLA distributed simulation extension
Wu Zebin,Wu Huizhong,Li Weiqing
Strategic Study of CAE 2008, Volume 10, Issue 7, Pages 141-146
Studying on related work about HLA extension, two typical problems of HLA distributed simulation interoperability and reusability are focused on, and a decoupled architecture of HLA extension is proposed based on web services. A prototype is implemented based on pRTI and AXIS SOAP engine. Encapsulation and deployment of RTI services, as well as a remapping of the RTI API calls to SOAP is demonstrated by exemplars. The extension can encapsulate intrinsic RTI library and extend traditional HLA distributed simulation application to WAN ; has strong compatibility ; can be used to accomplish loose coupled and cross-platform distributed simulation system.
Keywords： HLA/RTI distributed simulation web services SOAP architecture
Dynamical Fast IP-Routing Lookup Algorithm
Liu Yalin
Strategic Study of CAE 2002, Volume 4, Issue 7, Pages 60-68
This paper proposes a dynamical fast IP-routing lookup algorithm (DFR). This algorithm uses special data structure to construct index table, and can support inserting, deleting and updating route dynamically. DFR algorithm accesses memory at most four times and at least two times for a route look up. DFR is suitable not only for hardware implementation but also for software implementation.
Keywords： prefix expansion dynamical fast IP-routing lookup algorithm (DFR) route route lookup
Title Author Date Type Operation
Joint tracking and classification of extended targets with complex shapes
Liping Wang, Ronghui Zhan, Yuan Huang, Jun Zhang, Zhaowen Zhuang,zhanrh@nudt.edu.cn
Journal Article
Multi－target Tracking Algorithm for Multi－static Radar SystemBased on Parallel Processing Mechanism
Xu Hongkui,Wang Dongjin,Chen Weidong
Journal Article
Performance analysis of two EM-based measurement bias estimation processes for tracking systems
Zhi-hua LU, Meng-yao ZHU, Qing-wei YE, Yu ZHOU
Journal Article
Research on Prony’s method modeling in multi-target detection of stepped-frequency radar
Hu Tiling,Li Xingguo
Journal Article
Extended Hemispherical Lens and Its Applications in Millimeter Wave Focal Imaging Systems
Sun Zhongliang,Dou Wenbin
Journal Article
Generalization and application in time series forecasting of the least square support vector machine method
Xiang Xiaodong
Journal Article
Active Virtual Server and a Novel Mechanism for Data Integration over Internet
He Xingui,Yang Lianghuai,Tang Shiwei,Yang Dongqing,Chen Lijun,Zhang Zhen,Lin Bin
Journal Article
An efficient wear-leveling-aware multi-grained allocator for persistent memory file systems
Tao CAI, Pengfei GAO, Dejiao NIU, Yueming MA, Tianle LEI, Jianfei DAI,caitao@ujs.edu.cn,1306943800@qq.com
Journal Article
Detecting slowlymoving infrared targets using temporal filtering and association strategy
Jing-li GAO,Cheng-lin WEN,Zhe-jing BAO,Mei-qin LIU
Journal Article
Multiobjective Decision Making Theory and Model for Floodcontrol Operation
Chen Shouyu
Journal Article
A Numerical Study of Wave Propagation and Cracking Processes in Rock-Like Material under Seismic Loading Based on the Bonded-Particle Model Approach
Xiaoping Zhang, Qi Zhang, Quansheng Liu, Ruihua Xiao
Journal Article
Enhanced collection of scattered photons in nonlinear fluorescence microscopy by extended epi-detection with a silicon photomultiplier array
Ruheng Shi, Cheng Jin, Chi Liu, Lingjie Kong,konglj@tsinghua.edu.cn
Journal Article
Surface Ship Target Recognition Research Based on SGA
Jiang Dingding,Xu Zhaolin,Li Kairui
Journal Article
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