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Current progress of information fusion in china

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Chinese Science Bulletin 2013年第36期58卷 4533-4540页

作者： JING ZhongLiang PAN Han QIN YanYuan School of Aeronautics and Astronautics Shanghai Jiao Tong University

Information fusion is a challenging task to extract the required information for high-level applications from various homogeneous or heterogeneous *** paper summarizes some improvements in recent five years in the presented structure of information fusion,including estimation fusion,image fusion and *** technologies of information fusion and their variants are *** the state-of-the-art of the algorithms for information fusion have been proposed,there still remains some fundamental challenges with regard to exploiting the emerging multi-sensors’characteristics and their special ***,some potential prospects of estimation fusion and image fusion are discussed.

关键词：信息融合进度中国图像融合多传感器发展前景挑战性结构

Pattern design on 3d triangular garment surfaces

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Journal of Zhejiang University-Science A(Applied physics & Engineering) 2007年第10期8卷 1642-1649页

作者： WANG Jin LU Guo-dong LI Ji-tuo CHEN Long ZHANG dong-liang State Key Lab. of CAd ＆ CG Zhejiang University Hangzhou 310027 China Institute of Automation Chinese Academy of Sciences Beijing 100080 China digital Fashion Ltd. Osaka 5410053 Japan

This paper focuses on a pattern design method for a 3d triangular garment surface. Firstly, some definitions of 3d style lines are proposed for designing the boundaries of patterns as drawing straight lines or splines on the triangular surface. Additionally some commonly used style lines are automatically generated to enhance design efficiency. Secondly, after style lines are preprocessed, a searching method is presented for quickly obtaining the boundaries and patches of a pattern on the 3d trian- gular surface. Finally a new pattern design reuse method is introduced by encoding/decoding the style line information. After style lines are encoded, the pattern design information can be saved in a pattern template and when decoding this template on a new garment surface, it automates the pattern generation for made-to-measure apparel products.

关键词： Pattern design Style lines 3d patch searching Encoding/decoding design reuse

In-package P/G planes analysis and optimization based on transmission matrix method

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Journal of Zhejiang University-Science A(Applied physics & Engineering) 2008年第6期9卷 849-857页

作者： Yin-jun WANG Cheng ZHUO Jun-yong dENG Jin-fang ZHOU Kang-sheng CHEN department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China

Power integrity (PI) has become a limiting factor for the chip's overall performance, and how to place in-package decoupling capacitors to improve a chip's PI performance has become a hot issue. In this paper, we propose an improved trans- mission matrix method (TMM) for fast decoupling capacitance allocation. An irregular grid partition mechanism is proposed, which helps speed up the impedance computation and complies better with the irregular power/ground (P/G) plane or planes with many vias and decoupling capacitors. Furthermore, we also ameliorate the computation procedure of the impedance matrix whenever decoupling capacitors are inserted or removed at specific ports. With the fast computation of impedance change, in-package decoupling capacitor allocation is done with an efficient change based method in the frequency domain. Experimental results show that our approach can gain about 5× speedup compared with a general TMM, and is efficient in restraining the noise on the P/G plane.

关键词： decoupling capacitor Power/ground (P/G) planes Simultaneous switching noise (SSN) Transmission matrixmethod (TMM) Irregular partition Power integrity (PI)

RELIABILITY-BASEd dESIGN OF COMPOSITES UNdER THE MIXEd UNCERTAINTIES ANd THE OPTIMIZATION ALGORITHM

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Acta Mechanica Solida Sinica 2008年第1期21卷 19-27页

作者： Rui Ge Jianqiao Chen Junhong Wei department of Mechanics Huazhong University of gcience and Technology Wuhan 430074 China

This paper proposed a reliability design model for composite materials under the mixture of random and interval variables. Together with the inverse reliability analysis technique, the sequential single-loop optimization method is applied to the reliability-based design of composites. In the sequential single-loop optimization, the optimization and the reliability analysis are decoupled to improve the computational efficiency. As shown in examples, the minimum weight problems under the constraint of structural reliability are solved for laminated composites. The Particle Swarm Optimization （PSO） algorithm is utilized to search for the optimal solutions. The design results indicate that, under the mixture of random and interval variables, the method that combines the sequential single-loop optimization and the PSO algorithm can deal effectively with the reliability-based design of composites.

关键词： laminated composites inverse reliability analysis reliability-based design sequential single-loop optimization method PSO

Earthquake forecast via neutrino tomography

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Chinese physics C 2011年第4期35卷 325-332页

作者：王彬陈亚正李学潜 department of physics Nankai University

We discuss the possibility of forecasting earthquakes by means of （anti）neutrino tomography. Antineutrinos emitted from reactors are used as a probe. As the antineutrinos traverse through a region prone to earthquakes, observable variations in the matter effect on the antineutrino oscillation would provide a tomography of the vicinity of the region. In this preliminary work, we adopt a simplified model for the geometrical profile and matter density in a fault zone. We calculate the survival probability of electron antineutrinos for cases without and with an anomalous accumulation of electrons which can be considered as a clear signal of the coming earthquake, at the geological region with a fault zone, and find that the variation may reach as much as 3% for νˉe emitted from a reactor. The case for a νe beam from a neutrino factory is also investigated, and it is noted that, because of the typically high energy associated with such neutrinos, the oscillation length is too large and the resultant variation is not practically observable. Our conclusion is that with the present reactor facilities and detection techniques, it is still a difficult task to make an earthquake forecast using such a scheme, though it seems to be possible from a theoretical point of view while ignoring some uncertainties. However, with the development of the geology, especially the knowledge about the fault zone, and with the improvement of the detection techniques, etc., there is hope that a medium-term earthquake forecast would be feasible.

关键词： neutrino mass and mixing neutrino interactions earthquakes

（Salen）Ti（Ⅳ）-Catalyzed Asymmetric Ring-opening of meso Epoxides Using dithiophosphorus Acid as the Nucleophile

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Chinese Chemical Letters 2006年第2期17卷 143-146页

作者： Zheng Hong ZHOU Zhao Ming LI Bing LIU Kang Ying LI Li Xin WANG Guo Feng ZHAO Qi Lin ZHOU Chu Chi TANG State Key Laboratory of Elemento-Organic Chemistry Institute of Elemento-Organic Chemistry Nankai University Tianjin 300071

The asymmetric ring-opening of epoxides with dithiophosphorus acids catalyzed by a （salen）Ti（Ⅳ） complex formed in situ from the reaction of Ti（OPr-i）4 and the chiral Schiff base derived from （1R,2R）-（＋）-diaminocyclohexane was realized. The resulting products were obtained with low to good enantioselectivity （up to 73% ee）.

关键词： (Salen)Ti(Ⅳ) complex ring-opening dithiophosphorus acid enantioselectivity meso epoxide.

Accelerometer error estimation and compensation for three-axis gyro-stabilized camera mount based on proportional multiple-integral observer

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Science china(Technological Sciences) 2014年第12期57卷 2387-2395页

作者： LI Shu Sheng ZHONG Mai Ying ZHAO Yan School of Instrument Science & Opto-engineering Beihang University

This paper deals with the problem of accelerometer error estimation and compensation for a three-axis gyro-stabilized camera mount. In a dynamic environment, the aircraft motion acceleration affects the accelerome ：er output and causes a degradation of attitude steady accuracy. In order to improve control accuracy, this paper proposes a proportional multiple-integral observer- based control strategy to estimate and compensate the accelerometer error. The basic idea of this paper is to approximate the error property by using a q-order polynomial function and extend the error and its derivatives as augmented states. Then a proportional multiple-integral observer is developed to estimate the error, with which the relationship between the error and the imbalance torque is formulated. The estimated value is compared to an angle threshold, the result of which is used to compen- sate the accelerometer output. Through static and vehicle-mounted experiments, it is demonstrated that compared with the tra- ditional method, the proposed method can improve the attitude steady accuracy effectively.

关键词： three-axis gyro-stabilized camera mount accelerometer error estimation and compensation proportional multiple-integralobserver imbalance torque

Assessment of grid inherent vulnerability considering open circuit fault under potential energy framework

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Journal of Central South University 2010年第6期17卷 1300-1309页

作者：刘群英刘起方黄琦刘俊勇 School of Automation University of Electronic Science and Technology Chengdu china Guodian Corporation Sichuan Ashine Power Co.Ltd School of Electrical Engineering and Informati on Sichuan University Chengdu

A potential energy framework for assessment of grid vulnerability was *** the framework,the branch potential energy function model was *** indexes,current vulnerability and forecasting vulnerability,were *** current vulnerability was used to identify the current vulnerable area through calculating the distance between the current transmitted power and initial transmitted power;and the forecast vulnerability under variation of power injection was used to predict the vulnerable area of next step and verify the current vulnerable *** simulation was performed under variant operating conditions with IEEE-30 bus system,which shows that almost area of 90% overlaps between current vulnerable area and forecasting vulnerable area,the overlapped area is termed as inherent vulnerable area of *** considering N-1 contingency,the assessment results of this method proposed agree with those of optimal power *** considering N-2 contingency,optimal power flow fails to obtain correct results,while the method based on energy framework gives reliable results.

关键词： inherent vulnerability branch potential energy (BPE) current vulnerability forecasting vulnerability phase angledifference

Study on the Behavior of Solar Array deployment with Root Hinge drive Assembly

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Chinese Journal of Aeronautics 2012年第2期25卷 276-284页

作者： dING Xilun LI Xin XU Kun YANG Qiaolong PU Hailing Robotics Institute Beihang University Beijing 100191 China Beijing Institute of Spacecraft System Engineering Beijing 100094 China

In this paper, a method of using a root hinge drive assembly （RHdA） to control the solar array deployment is provided and a multi-dOF mechanism dynamic model of the system is established. In this way, the root hinge torque can be calculated iteratively. Then taking the predicted torque as a reference, a RHdA is designed for a large multiple-stage packaging and deployable solar array system. The control effect of the drive assembly is validated by ground tests. The test results indicate that the solar arrays can be deployed smoothly, and the deployment velocities are restricted by the drive assembly as expected. during the tests, the RHdA output speed and output torque are obtained. In order to examine the impact force when the yoke is lock-up with a hard stop, dynamics simulations are performed according to the actual behavior. The simulation result indicates that the designed RHdA reduces the impact force significantly and improves the lock-up reliability effectively.

关键词： solar array root hinge drive assembly multi-dOF model dynamics simulation reliability lock-up