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DESIGN AND IMPLEMENTATION OF AN INFRARED SCENE TARGET SIMULATOR
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作者 Tang Shuo Sun Li(College of Astronautics, Northwestern Polytechnical University, Xi’an, China, 710072)Wu Yonggang Wu Genshui(Eletric-Optical Research Center of MAS, Luoyang, Henan, China, 471009) 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 1997年第1期46-50,共5页
A general review is presented of the development of infrared scene targetsimulators; special characters and advantages of scene simulators based on computer-MOSresistor array are discussed by comparing with scaled mod... A general review is presented of the development of infrared scene targetsimulators; special characters and advantages of scene simulators based on computer-MOSresistor array are discussed by comparing with scaled model simulators; the system principle, structure, key technologies, software and hardware implementation are described. 展开更多
关键词 infrared imagery target simulators RESISTORS
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Allosteric Mechanism of Calmodulin Revealed by Targeted Molecular Dynamics Simulation
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作者 梁倩云 庞春丽 +4 位作者 李军委 张素花 柳辉 展永 安海龙 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第6期121-125,共5页
Calmodulin (CAM) is involved in the regulation of a variety of cellular signaling pathways. To accomplish its physiological functions, CaM binds with Ca2+ at its EF-hand Ca2+ binding sites which induce the conform... Calmodulin (CAM) is involved in the regulation of a variety of cellular signaling pathways. To accomplish its physiological functions, CaM binds with Ca2+ at its EF-hand Ca2+ binding sites which induce the conformational switching of CaM. However, the molecular mechanism by which Ca2+ binds with CaM and induces conformational switching is still obscure. Here we combine molecular dynamics with targeted molecular dynamics simulation and achieve the state-transition pathway of CaM. Our data show that Ca2+ binding speeds up the conformational transition of CaM by weakening the interactions which stabilize the closed state. It spends about 6.5 ns and 5.25 ns for transition from closed state to open state for apo and holo CaM, respectively. Regarding the contribution of two EF-hands, our data indicate that the first EF-hand triggers the conformational transition and is followed by the second one. We determine that there are two interaction networks which contribute to stabilize the closed and open states, respectively. 展开更多
关键词 CA EF TMD Allosteric Mechanism of Calmodulin Revealed by targeted Molecular Dynamics Simulation
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Development of a New Target Simulator
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作者 Gao Tiande Li Zhishun(College of Marine Engineering, Northwestern Polytechnical UniversityXi’an, 710072, Shaanxi, P.R.China) 《International Journal of Plant Engineering and Management》 1999年第1期404-410,共7页
The.functions of a general target simulator are too few to provide the sonar equipmentand sonar signal-Processing algorithm with a set of integrated experimental data. In this paper anew universal target simulator is ... The.functions of a general target simulator are too few to provide the sonar equipmentand sonar signal-Processing algorithm with a set of integrated experimental data. In this paper anew universal target simulator is developed based on the sound scattering theory. It can produceintegrated simulated data for the various existing sonar equipment and the usual sonar signalprocessing algorithms. The means and efficiency of detection of sonar equipment are improvedby this new simulator In the meantime, this new device stimulates the research on sonar signalprocessing algorithms. 展开更多
关键词 target simulator sonar equipment sound scattering DSP (Digital SignalProcessing)
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SCSI Target Simulator Based on FC and IP Protocols in TH-MSNS 被引量:2
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作者 李必刚 舒继武 郑纬民 《Tsinghua Science and Technology》 SCIE EI CAS 2006年第5期589-596,共8页
Storage area networks (SAN) generally use fiber channel (FC) disks, but they are expensive, hard to scale, and incompatible with previous storage arrays. This paper describes an SCSI interface disk array, which is... Storage area networks (SAN) generally use fiber channel (FC) disks, but they are expensive, hard to scale, and incompatible with previous storage arrays. This paper describes an SCSI interface disk array, which is controlled by a simulated target controller, as the target device of an SAN system. A detailed target- mode SCSI middle level design and implementation is described with interfaces to efficiently supervise the entire target simulator. The target simulator has control flexibility, wide applicability, reduced SAN system cost, and compatibility with current SAN systems. The present mass data storage system uses a 2-Gb/s fiber network. Performance and compatibility tests demonstrate the efficiency of the target simulator design. 展开更多
关键词 storage area networks (SAN) target simulator SCSI fiber channel
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A Fast Algorithm for Solving CNOP and Associated Target Observation Tests 被引量:8
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作者 王斌 谭晓伟 《Acta meteorologica Sinica》 SCIE 2009年第4期387-402,共16页
Conditional Nonlinear Optimal Perturbation (CNOP) is a new method proposed by Mu et al. in 2003, which generalizes the linear singular vector (LSV) to include nonlinearity. It has become a powerful tool for studyi... Conditional Nonlinear Optimal Perturbation (CNOP) is a new method proposed by Mu et al. in 2003, which generalizes the linear singular vector (LSV) to include nonlinearity. It has become a powerful tool for studying predictability and sensitivity among other issues in nonlinear systems. This is because the CNOP is able to represent, while the LSV is unable to deal with, the fastest developing perturbation in a nonlinear system. The wide application of this new method, however, has been limited due to its large computational cost related to the use of an adjoint technique. In order to greatly reduce the computational cost, we hereby propose a fast algorithm for solving the CNOP based on the empirical orthogonal function (EOF). The algorithm is tested in target observation experiments of Typhoon Matsa using the Global/Regional Assimilation and PrEdiction System (GRAPES), an operational regional forecast model of China. The effectivity and feasibility of the algorithm to determine the sensitivity (target) area is evaluated through two observing system simulation experiments (OSSEs). The results, as expected, show that the energy of the CNOP solved by the new algorithm develops quickly and nonlinearly. The sensitivity area is effectively identified with the CNOP from the new algorithm, using 24 h as the prediction time window. The 24-h accumulated rainfall prediction errors (ARPEs) in the verification region are reduced significantly compared with the "true state," when the initial conditions (ICs) in the sensitivity area are replaced with the "observations." The decrease of the ARPEs can be achieved for even longer prediction times (e.g., 72 h). Further analyses reveal that the decrease of the 24-h ARPEs in the verification region is attributable to improved simulations of the typhoon's initial warm-core, upper level relative vorticity, water vapor conditions, etc., as a result of the updated ICs in the sensitivity area. 展开更多
关键词 fast algorithm CNOP (Conditional Nonlinear Optimal Perturbation) target observation OSSE (observing system simulation experiment)
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