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Systematic error real-time registration based onmodified input estimation

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Journal of Systems Engineering and Electronics 2016年第5期27卷 986-992页

作者： jianjuan xiu kai dong you he Research Institute of Information Fusion Naval Aeronautical and Astronautical University Yantai 264001 China

In order to estimate the systematic error in the processof maneuvering target adaptive tracking, a new method is *** proposed method is a linear tracking scheme basedon a modified input estimation approach. A special augmentationin the state space model is considered, in which both the systematicerror and the unknown input vector are attached to thestate vector. Then, an augmented state model and a measurementmodel are established in the case of systematic error, andthe corresponding filter formulas are also given. In the proposedscheme, the original state, the acceleration and the systematicerror vector can be estimated simultaneously. This method can notonly solve the maneuvering target adaptive tracking problem in thecase of systematic error, but also give the system error value inreal time. Simulation results show that the proposed tracking algorithmoperates in both the non-maneuvering and the maneuveringmodes, and the original state, the acceleration and the systematicerror vector can be estimated simultaneously.

关键词： systematic error estimation maneuvering target,adaptive tracking augmented system model modified input estimationapproach.

Sequential Track Monitoring with Multiple 2-D Passive Sensors

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Journal of Systems Engineering and Electronics 1998年第2期9卷 31-39页

作者： Wang, Guohong he, you Naval Aeronautical Engineering Acad Yantai China

Track monitoring is a fast method of determining incorrect return-to-track and track-to-track assignments. An analytical method to evaluate the effectiveness of track monitoring was presented by reference [1]. In order to reduce the probability of initiating or accepting the ghost track, two sequential track monitoring algorithms, which use the inclination angles to form test statistics, are proposed in this paper. Two decision rules are given and the corresponding thresholds are derived. The paper also gives the estimation methods of the noncentral parameter of noncentral chi-square distribution when the true value of it is unknown, the algorithms can adaptively estimate the decision thresholds and can make sequential track monitoring decision on line. Simulation is also made and the results show that the proposed algorithms are effective and feasible.

关键词： Algorithms Computer simulation Decision theory Estimation Measurement errors Probability Tracking (position) Two dimensional

Efficient combination rule of Dezert-Smarandache theory

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Journal of Systems Engineering and Electronics 2008年第6期19卷 1139-1144页

作者： Hu Lifang Guan Xin he you Research Inst. of Information Fusion Naval Aeronautical Astronautical Univ. Yantai 264001 P. R. China

The Dezert-Smarandache theory （DSmT） is a useful method for dealing with uncertainty problems. It is more efficient in combining conflicting evidence. Therefore, it has been successfully applied in data fusion and object recognition. However, there exist shortcomings in its combination rule. An efficient combination rule is presented, that is, the evidence＇s conflicting probability is distributed to every proposition based on remaining the focal elements of conflict. Experiments show that the new combination rule improves the reliability and rationality of the combination results. Although evidences conflict another one highly, good combination results are also obtained.

关键词： DSmT the focal element of conflict object recognition.

New multi-layer data correlation algorithm for multi-passive-sensor location system

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Journal of Systems Engineering and Electronics 2007年第4期18卷 667-672页

作者： Zhou Li Li Lingyun he you School of Management Ludong Univ. Yantai 264025 P. R. China Research Inst. of Information Fusion Naval Aeronautical Engineering Inst. Yantai 264001 P. R. China School of Computer Science & Technology Ludong Univ. Yantai 264025 P. R. China

Under the scenario of dense targets in clutter, a multi-layer optimal data correlation algorithm is proposed. This algorithm eliminates a large number of false location points from the assignment process by rough correlations before we calculate the correlation cost, so it avoids the operations for the target state estimate and the calculation of the correlation cost for the false correlation sets. In the meantime, with the elimination of these points in the rough correlation, the disturbance from the false correlations in the assignment process is decreased, so the data correlation accuracy is improved correspondingly. Complexity analyses of the new multi-layer optimal algorithm and the traditional optimal assignment algorithm are given. Simulation results show that the new algorithm is feasible and effective.

关键词： multi-passive-sensor data correlation multi-layer correlation algorithm location system correlation cost

Bayesian edge detector for SAR imagery using discontinuity-adaptive Markov random feld modeling

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Chinese Journal of Aeronautics 2013年第6期26卷 1534-1543页

作者： Yuan Zhan he you Cai Fuqing Research Institute of Information Fusion Technology Naval Aeronautical and Astronautical University

Synthetic aperture radar（SAR）image is severely affected by multiplicative speckle noise,which greatly complicates the edge *** this paper,by incorporating the discontinuityadaptive Markov random feld（DAMRF）and maximum a posteriori（MAP）estimation criterion into edge detection,a Bayesian edge detector for SAR imagery is accordingly *** the proposed detector,the DAMRF is used as the a priori distribution of the local mean reflectivity,and a maximum a posteriori estimation of it is thus obtained by maximizing the posteriori energy using gradient-descent *** normalized ratios constructed in different directions are computed,based on which two edge strength maps（ESMs）are *** fnal edge detection result is achieved by fusing the results of two thresholded *** experimental results with synthetic and real SAR images show that the proposed detector could effciently detect edges in SAR images,and achieve better performance than two popular detectors in terms of Pratt＇s fgure of merit and visual evaluation in most cases.

关键词： Discontinuity-adaptive Markov random feld(DAMRF) Edge detection Local mean reflectivity Maximum a posteriori(MAP) estimation Synthetic aperture radar(SAR

The crosstalk between autophagy and apoptosis: where does this lead?

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Protein & Cell 2012年第1期3卷 17-27页

作者： Claire Gordy you-Wen he Department of Immunology Duke University Medical CenterDurhamNC 27710USA

Recent advances in the understanding of the molecular processes contributing to autophagy have provided insight into the relationship between autophagy and *** contrast to the concept of“autophagic cell death,”accumulating evidence suggests that autophagy serves a largely cytoprotective role in physiologically relevant *** cytoprotective function of autophagy is mediated in many circumstances by negative modulation of *** signaling,in turn,serves to inhibit *** the mechanisms mediating the complex counter-regulation of apoptosis and autophagy are not yet fully understood,important points of crosstalk include the interactions between Beclin-1 and Bcl-2/Bcl-xL and between FADD and Atg5,caspase-and calpain-mediated cleavage of autophagy-related proteins,and autophagic degradation of *** investigation of these and other means of crosstalk between apoptosis and autophagy is necessary to elucidate the mechanisms controlling the balance between survival and death both under normal conditions and in diseases including cancer.

关键词： autophagy apoptosis Beclin-1 lymphocytes

Composite filtering with feedback information

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Journal of Systems Engineering and Electronics 2007年第1期18卷 54-56页

作者： he you Xiong Wei Ma Qiang Dept. of Electronic Engineering Naval Aeronautical Engineering Inst. Yantai 264001 P. R. China

The optimal fusion solution with feedback information for a hybrid multisensor data fusion system is presented. In this system, a part of sensors process their data locally to produce local tracks, and another part of sensors only provide detection reports These tracks and detection reports are communicated to a central site where track fusion and composite filtering are performed. The comparative results on the simulations suggest the feedback information from the center can greatly improve the tracking performance of the local node.

关键词： Data fusion Hybrid system Multisensor tracking Filtering

Review of progress and challenges of key mechanical issues in high-field superconducting magnets

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National Science Review 2023年第3期10卷 29-50页

作者： you-he Zhou Dongkeun Park Yukikazu Iwasa Key Laboratory of Mechanics on Disaster and Environment in Western China attached to the Ministry of Education of China Lanzhou University Department of Mechanics and Engineering Sciences College of Civil Engineering and Mechanics Lanzhou University The Plasma Science and Fusion Center Francis Bitter Magnet LaboratoryMassachusetts Institute of Technology

The development of modern science and technology requires high magnetic fields exceeding 25 ***-generation high-temperature superconducting wires,***(REBa2Cu3O7-x,RE refers to Y,Gd,Dy,Eu and other rare-earth elements) coated conductors(CCs),have become the first choice for high-field magnet construction because of their high irreversible magnetic *** mechanical stresses caused by manufacturing,thermal mismatch and Lorenz forces closely influence electromagnetic performance during operation for REBCO *** addition,the recently studied screen currents have effects on the mechanical characteristics of high-field REBCO *** this review,the experimental and main theoretical works on critical current degradation,delamination and fatigue,and shear investigations on REBCO CCs,are reviewed at ***,research progress on the screening-current effect in the development of high-field superconducting magnets is ***,the key mechanical problems facing the future development of high-field magnets based on REBCO CCs are prospected.

关键词： REBCO second-generation high-temperature superconducting coated conductors (REBCO 2G-HTS CCs) high-field magnets mechanics screening-current effect

Theoretical analysis for the mechanical behavior caused by an electromagnetic cycle in ITER Nb3Sn cable-in-conduit conductors

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Acta Mechanica Sinica 2018年第4期34卷 614-622页

作者： Donghua Yue Xingyi Zhang you-he Zhou Department of Mechanics and Engineering Sciences College of Civil Engineering and MechanicsLanzhou UniversityLanzhou 730000China Key Laboratory of Mechanicson Disaster and Environmentin Western China attached to the Ministry of Education of China Lanzhou 730000China

The central solenoid（CS）is one of the key components of the International Thermonuclear Experimental Reactor（ITER）tokamak and which is often considered as the heart of this fusion *** solenoid will be built by using Nb3Sn cablein-conduit conductors（CICC）,capable of generating a 13 T magnetic *** order to assess the performance of the Nb3Sn CICC in nearly the ITER condition,many short samples have been evaluated at the SULTAN test facility（the background magnetic field is of 10.85 T with the uniform length of 400 mm at 1%homogeneity）in Centre de Recherches en Physique des Plasma（CRPP）.It is found that the samples with pseudo-long twist pitch（including baseline specimens）show a significant degradation in the current-sharing temperature（Tcs）,while the qualification tests of all short twist pitch（STP）samples,which show no degradation versus electromagnetic cycling,even exhibits an increase of *** behavior was perfectly reproduced in the coil experiments at the central solenoid model coil（CSMC）facility last *** this paper,the complex structure of the Nb3Sn CICC would be simplified into a wire rope consisting of six petals and a cooling *** analytical formula for the Tcs behavior as a function of the axial strain of the cable is *** on this,the effects of twist pitch,axial and transverse stiffness,thermal mismatch,cycling number,magnetic distribution,etc.,on the axial strain are discussed *** calculated Tcs behavior with cycle number show consistency with the previous experimental results qualitatively and ***,we focus on the relationship between Tcs and axial strain of the cable,and we conclude that the Tcs behavior caused by electromagnetic cycles is determined by the cable axial *** the cable is in a compression situation,this compression strain and its accumulation would lead to the Tcs *** experimental observation of the Tcs enhancement in the CS STP samples should be consid

关键词： Mechanical behavior Nb3Sn cable in conduit conductor Electromagneti ccycle Sharing temperature