Abstract:The fully plastic J-integral of the embedded elliptic crack, on which the uniform pressure is exerted, in the infinite body of power hardening material is derived cleverly by use of energy method in this paper. The fully plastic J-integral is a simple analytic form. The solving process is base on the solution of HRR^[1,2].

Abstract:This paper uses patched grid method to divide grids and parallel software platform PVM based on message-passing to distribute computational task. The large scale parallel numerical simulations of 3-D supersonic blunt body base flow are accomplished. The results show that the pressure characteristics in base are coincident with experimental results and base flow's topological configurations are reasonable.

Abstract:A nonlinear aerodynamic model has been identified by applying the estimation-before-modeling (EBM) technique to flight testing data. The two-part algorithm contains a nonlinear state estimator and a curve-fitting procedure. The results show that this technique is useful for quick determination of aerodynamic coefficients, and particularly applicable to nonlinear flight regimes, such as high angle-of-at tack regime.

Abstract:In this paper, in order to improve the small satellite's positioning precision under constellation mode, we discuss a methed to deal with whole network datum of psecdocode measuring distance of GPS carried on the satellites, based on decreasing or eliminating error by difference between satellites and introducing the network restraint of constellation. After that, an actual example is given. Finally, we present several presumptions aiming at small satellite constellation's measurement and control, while not relying on GPS and raising the independence of small satellite constellation's positioning.

Abstract:we propose a language model of behavior to define complex behaviors relations and its time constraints. YHVML, the modeling language of distributed VR software development platform YHVRP, implements the model, whose run-time environment implements the VE Computing Model for complex behaviors and adopts LLF method to schedule behaviors dynamically so as to keep the real-time interactivity and fidelity of VR application.

Abstract:This paper researches into the actual machine learning system taking advantage of the idea of evolutionary computation, and realizes the multi-goal optimization technique by applying the implicit parallelism mechanism and the parallel rule triggering strategy. In accordance with the specific task of machine learning, simulated pilot training grading standards, this paper adopts a kind of free hybrid coding scheme (multi-level and dynamic), establishes several simple and complete evolutionary operations, realizes the mechanism of competition by the credit assignment with brigade bucket algorithm. It relies on evolutionary algorithm to search for, find and select the proper rules, realizes several implicit objectives by inducting heuristic knowledge to create default rule structure, and designs a genetic evolutionary machine learning system (GEML-1) with satisfied robustness and flexibility. The method of machine learning can be generalized to apply in different kinds of expert system and military decision support system so as to provide a new kind of designing method and realizing path for machine learning.

Abstract:Consistency is one of the most fundamental syntactic concepts in mathematical logic. By treating consistency in an abstract way, Smullyan presented abstract consistency class, and proved the socalled Smullyan's unifying principle. In this paper, considering various properties possessed by the class of consistent sets of wffs in first-order logic system, we generalize the concept of abstract consistency class into the most general form-universal abstract consistency class, and further prove its universal unifying principle. This result can be used to prove the completeness theorems of first-order logic system and the universal refutation method proposed by us.

Abstract:Executing result of parallel programs which communicate by passing messages, can be nondeterministic due to variations in process scheduling and message latencies. Such nondeterminacy can cause serious problems while debugging: subsequent executions of the program may not reproduce the original bug. Therefore, a tracing and replaying mechanism is introduced into parallel debugging environments. This paper discussed an advanced algorithm for tracing and replaying, and its implementation.

Abstract:The paper discusses the typical cell structure of flash memory and its principle of information storage. In addition, the organizations and working mechanisms of the NOR and NAND flash memory matrices, which are widely applied at present, are detailed.

Abstract:Software reuse is the effective way to reduce the cost, shorten the period of developing , and improve the reliability and maintainment of system, while component software is the advanced technology. The paper introduces a remote sensing information process system, in which the component software technology is used.

Abstract:In this paper, characteristics of IR radiation spectrum of target and decoy in space are discussed in detail using thermophysics theory based on their surface temperature field. The essential difference in IR radiation and mid-trajactory target is pointed out and a fundamental feature function (FFF) of IR target recognition is exracted. A 4-dimention feature vector for IR point target recognition is constructed with FFF. Emulator experiment of IR point target recognition meets with success by using this feature vector.

Abstract:This paper first presents a study on the concept and contents of Digitized Battlefield, then discussed the architecture of Digitized Battlefield, the design methods of how to make an interconnection and interoperation in the system. In this section, a conclusion is drawn that the most important step to organize a Digitized Battlefield System is to combine modern open-system technology with the special military requirements, and study the architecture of the system, the standard and the regulation of the information interface in different depth.

Abstract:This paper presents some notion and connotation of the Individual Soldire Digitization System under the condition of Digitized Battlefield. The efficiency of the Individual Soldier System is analyzed by using Lanchester model. Then the basic functional unit and the whole architecture are discussed.

Abstract:In the paper, 1-D Root-MUSIC is generalized to 2-D case which utilizes 1-D Root-MUSIC, and the new 2-D DOA estimation method has the advantage of low computation cost.

Abstract:The evaluation method of speech on multimedia interface is being studied. This paper discusses Some basic methods of speech evaluation, putting the emphasis on the research of the objective evaluation of speech. Using analytical technology of speech signal, the authors have developed a computer objective evaluation method to evaluate the overall effectiveness of speech.

Abstract:Stochastic temporal reasoning in situation assessment (SA) is very important in many applications. The approach based on Maximun Likelihood Estimation (MLE) treats the unknown temporal variable as a constant, which doesn't use a priori information and generates a larger/estimate variance. In this paper, the relation model of known temporal information and unknown temporal variable has been established, which can also be used for MLE-based method. In the model, the reasoning algorithm about time instants has been derived from treating the unknown temporal variable as random variable and introducing MAP estimation into temporal reasoning. The performance analysis between MAP-based method and MLE-based method shows that under some conditions, the estimate variance of MAP-based method is lower than that of the MLE-based method, and we have given these conditions in experiments.

Abstract:Opening switch technology is the key to inductive storage system. In this paper, the mechanism of conductor's electrically exploding is discussed. The experience formula is presented to determine the parameters of the electrically exploded conductor as an opening switch. And the configuration of such an opening switch is designed. Good results have been achieved in experiment. By the adjusting of conductor parameters, high-power pulse signals are generated with the duration of 280ns and the voltage gain of several tens. It is showed that this kind of opening switch can play an important role in high power microwave generation with such device as vircator used as the load.

Abstract:Based on elaborating the basic intension of Environment Reliability Experiment Technology (ERET), this paper analyses the general development of ERET in our country, as well as the main existing problems. Moreover, from the angle function integration and information integration, the paper proposes a future mode of ERET and describes its main functions as well.

Abstract:Due to the appearance of the Agile & Virtual manufacturing and global manufacturing system, the old CAD/CAM system can't be applied to product development of virtual enterprises and a new CAD/CAM system must be developed. According to our national conditions, this paper discusses a new CAD/CAM system-Pseudo-Agile Intelligent CAD/CAM(PAI-CAD/CAM) system.

Abstract:In this paper, the nearby elementary processes are rebuilt, which were first built by Edward Nelson in 1987, under the frame of Robinson-Luxemberg. It is significant that we can get back the primary processes from this nearby elementary processes, which provides the foundation of stochastic analysis under this frame.

Abstract:Disjoint of Boolean function is an important apporach to the calculation of system reliability. In this paper , based on cubical form of Boolean function and disjoint algebra, an algorithm is presented for disjoint of Boolean function, several relative laws for cubes operation are defined, and cubical matrix disjoint algorithm is given with a numerical example. The algorithm is effective and simple.

Abstract:The method of DJ's VisuShrink denoising has been applied widely in degital signal processing. But the quality of the signal restored from noise is related to the parameter j₀, the low-resolution cutoff, and that the selecting of j₀ is related to the noise power σof a signal corrupted by an additive noise and the sampling rate of the signal. This article analyzes these relationships among these parameters and gives many simulation results. These results have significant meanings in selecting the parameter j₀.

Abstract:The poly (p-phenylene borane) and poly (m-phenylene borane )are synthesized by the modified organometallic route. The structure and the elemental composition are detemined by IR and NMR. The molecular weight (M-n) of poly (p-phenylene borane) is 783.66 and its structure is (1) (soluble in ether, its benzene ring is substituted at 1 and 4 positions) and (2)(insoluble in ether, its benzene ring is substituted at 1 and 4 positions); the M-n of poly (m-phenylene borane) is 876.56 and its structure is (1) (soluble in ether, its benzene ring is substituted at 1 and 3 positions) and (2)(insoluble in ether, its benzene ring is substituted at 1 and 3 positions).

Abstract:The boron carbide ceramic precusors-poly carborane(PCB) are synthesized by using pdibromobenzene(PDBB), boron trifluoride ether solution and magesium(Mg) as the raw materials. Carbon fiber(CF) is dipped in the solution of PCB and methyl benzene and is pyrolysised at high temperature, and the CF coated by boron carbide is obtained. The properties of the thermal oxidation resistance of the coated CF are studied.

Abstract:The relation of the thermal conductivity of diamond/Ag composites to the particle size and volume fraction of particles in the composites is investigated in this paper. The influence of thermal boundary-resistance on thermal conductivity of composite material is discussed in particular. The thermal conductivity of diamond/Ag composites can be improved by the titanizing diamond particles, because of the improved wettability between diamond and silver, and reduction of thermal boundary-resistance.