Abstract:We are facing the two tasks of information-based and mechanization construction. This paper analyses the information-based trend in the modern war and the surpassing development thinking that information technology drives mechanization, presents the methods and thought about ground to air weapons surpassing development based on information technology research and experience, and discusses the key surpassing development problem. The study is important in guiding the theory and application of information war and information war field construction.

Abstract:A new type of extended Petri net model - Timing Constraint Colored Petri Net is advanced and studied. Then the service types, resource types and performances, and the facility scheduling policies are analyzed within the multi-satellites-ground station system. Based on this, the system model is established, which provides ways and means for the optimization of facility development scheme and for the dynamic performance analyzing of the whole satellite-ground system.

Abstract:The Faver-average N-S equations are solved by using Beam-warning approximate factorization method combined with k-ε model and a high-order compact-difference scheme for the micro-jet actuator external flowfield,, at the same time, numerical simulation is performed to the compressible, two dimensional, time-dependent and viscous flowfield. Newton-like subiterations within each physical time step are employed to achieve temporal accuracy, remove factorization errors and reduce errors caused by linearization and the low spatial order of accuracy of the implicit operator. The implicit high-order compact-difference has high accuracy and good robustness. The algorithm demonstrates high accuracy compared to both second-order and upwind-biased methods. For several cases, particularly very low-Mach number flows, filtering is a superior alternative to damping. The calculating results tally with the experimental results.

Abstract:The siting error and L>O>P> of short distance navigation positioning system have been analyzed. The relationship between positioning precision of navigation system and detecting probability of fighter for intercepting is established. The curve of relationship on the detecting probability with the navigation system operating range and the explorative distance of airborne radar is set up for the first time. The influence on the intercepting effectiveness of fighter by the navigation system is presented. So it is of great value to tactic research and application of navigation system.

Abstract:By analyzing the factors that influence optimum selection of MOS in the procedure of airfield repair, the theory of MOS selection based on the fretting degree is established and the optimum auxiliary software for MOS is developed. The example shows that this theory and the software can be applied to the practical repair work of airfield.

Abstract:This paper puts forward a simple yet effective method of evaluating the effect of external stores on aircraft flight performance. First the general model and the basic principle are presented for the evaluation, then the directional evaluation for analyzing the effect of external stores on aircraft maximum speed of level flight, flying range and aerodynamic coefficients, etc. is provided, finally the mathematical model for evaluating the performance parameter is obtained and the ceiling increment is calculated by using the mathematic model.

Abstract:This paper mainly introduces the hardware and software design methods of the testing equipment of fly-by-wire control system based on PC/104 bus, it also brings forward the method of using database technology to program testing database and to simplify the testing software programming. The result of practical use shows that the testing equipment has characteristics of high automation, quick testing speed, high precision, simple operation and good maintainability, etc.

Abstract:The method of moments (MOM) and the asymptotic waveform evaluation (AWE) technique are adopted to make quick prediction of the broadband responses of the cirque antenna in this paper. The main steps are as follows: first get the current distribution over a given frequency with MOM, then adopt AWE technique to achieve the current distribution over a random band, and finally calculate the broadband responses of the cirque antenna. The results indicate that the AWE technique not only can well approximate the exact numerical value solution of MOM, but also can improve the velocity of calculation by several times which saves the calculation time of CPU.

Abstract:This paper gives a detail analysis of the impedance and radiating characteristics of a microstrip patch antenna by computer simulation. Some relationships between its size and characteristic parameters have been found. A new structure of microstrip antenna is presented based on the analysis, which can be used in VSAT station and can meet the requirements of C-band satellite communication for dual-frequency, wide band, dual-polarization and isolation.

Abstract:According to the actualities of the military communication network, a conception that deals with the construction of synthetical NM platform of the military communication network is presented, while its main function and the meaning of construction are also analyzed. Based on the particular analysis of the peculiar condition of the military communication network, some strategy and principles concerning construction of the platform are presented.

Abstract:Based on the thought of adding the weight of the aspect in low-level on the comprehensive evaluation, this paper proposes a method of determining the weight in the fuzzy variable weighting. The evaluation of communication schemes in the effectiveness evaluation command is carried out in this way.

Abstract:The capacity of the spread spectrum system is determined by the auto-correlation and cross-correlation characteristics of the pseudorandom sequence. According to the research of ZCZ sequences,an improved ZCZ sequemce design method is given to improve its auto-correlation characteristic and extend its zero cross-correlation zone, which will enlarge the capacity of CDMA system.

Abstract:This paper presents a full-duplex asynchronous serial communication in the distributed test control platform, realizing the data communication in each combination. The system is of double clock design structure which makes the odd verifying circuit structure simple and easily effected. Through experiment and debugging on the spot, the system can completely fulfill the design requirements.

Abstract:The laryngophone , in spite of its strong ability of anti-environment, will produce a certain noise itself while being used. In this paper, by making use of the relevance of the microphone speech signal with the laryngphone speech signal recorded synchronously, the noise signal of the laryngophone is abstracted by the auto-adaptive linear filter, and based on this, its characteristics are analyzed and the solution is put forward.

Abstract:Image fusion is an important application in the field of image processing using multisensors information , and taking wavelet transform as a tool is a great breakthrough in research method of this fieldOn the basis of wavelet transform , the paper proposes a kind of multispectral image fusion algorithm after the study of area-based selection rule, and compares this algorithm with other algorithms in existence . The results show that this algorithm is not only simple and of high stability but effective in image enhancement , therefore it is a advisible algorithm in image enhancement.

Abstract:Periodicity in absolute value of DS signal ST-FFT is proved in this paper. The periodicity can be abstracted by adaptive filter. The existence of DS signal can be determined by finding if the periodicity exists. In computer simulation, the result shows that this method can be used to scout DS signal.

Abstract:Based on the research and development of Town Electronic Governance System in Nanhai city, this paper introduces the pivotal technique in designing and implementing decision support system of town electronic governance.

Abstract:An analysis of contemporary Expert Systems is given and shortcomings existing in those ES are put forward. Distributed synergistic Expert systems based distribution and multiple-expert cooperation is presented. Typical structure is given and simple analysis of sections is described.

Abstract:By applying the new technology of bus, the modularized and structured design principle to the testing of aero-instruments, VI hardware and GP-IB instruments are optimally integrated. This paper compares the way of VI hardware driver control with VISA library control and also introduces an intelligent testing method. The system introduced in this paper achieves a satisfactory effect through debugging and running and is of practical value.

Abstract:The optimization design of VHDL is for the purpose of making full use of hardware resources provided by CPLD, making the item design suit to certain scale of CPLD chip, increasing the system speed and lowering the power-waste. The intention of optimization is to reduce adapted macrocell numbers, especially the GLE chip numbers of Lattice company. The fact shows that some optimization methods are effective in practice, such as changing the module structure and the method of description, making the module resources shared as much as possible, the versatility design of time-sequence electro-circuit working pattern and the selection of Flip-Flop types, etc. They can improve adaptation result of item and function price ratio to system, VHDL has great value in the exploitation and appliance of CPLD chips.

Abstract:Multi-platform software development is a difficult problem frequently met in engineering practice. In practice, we adopt the method of GUI encapsulation in establishing one layer of interface called the interface abstracts layer. In transporting the whole program, the only thing to do is to revise this layer of interface, which only needs the least work load, thus better solving the problem of program transportability. On the Alpha work station, by taking the exploitation of GUI interface with Motif for example, the development in message loop, base widget of GUI interface and Event Callback is realized from Alpha-Unix's platform to PC-window's platform, and a good practical effect is obtained.

Abstract:This paper describes the evaluation method of predicting the extrapolated reliability measure of a product at a given future point by AMSAA model on condition that the previous test conditions and the modification procedures are kept unchanged, points out the deficiency in the modification of reliability growth prediction with AMSAA model and presents the reasonableness of the AMSAA model method.

Abstract:Uncertainties present everywhere in the physical and mathematical models. In most cases, it is difficult to describe the performance of systems using a precisely single number. But it is easy to describe the condition by using a range or an interval to represent it. In the reliability computation, when insufficient accurate data are available or the information is incomplete, a range representation of probability of failure may be more confident than the representation by a single number. In this paper, uncertainties of the parameters of stochastic model of reliability are described by intervals. A procedure is presented for the interval estimation of failure probability of mechanical structures when the distribution parameters are uncertain. It is shown by a numerical example that the probability of failure may be very sensitive to the possible errors of stochastic model. So enough attention must be paid to the reliability of stochastic modeling.

Abstract:The simulation of the electrical power market is very important to the market participants and the market governors. The simulation is a very useful tool for the research on the electricity market and its running. This article centers mainly on how to build the simulation system. One key issue to build the simulation system is to adopt different simulation models to suit different market participants such as the market administrator, the independent schedule center, the independent power supplier and the power purchase company, etc. In this article the different models are mentioned, the simulation system of electricity market based on the B/S software architecture is designed and explored, simultaneously some of the simulation results are offered.

Abstract:Through the analysis of the error inspection results of actual optical plane glass surface, this paper makes a thorough study of the theoretical and systematical errors in the laser quantizing plane inspecting system, offers the methods of judging the error type of the inspected surface according to the coefficients of Zernike polynomials, and simultaneously the paper also discusses the effect of the number of interference stripe and the order of Zernike polynomials on precision of the system.