Abstract:With the increase of new types of aircraft in number, the original obstruction requirement cannot live up to the needs. According to the needs, flight routes of new aircraft are established through testing and theoretical calculation of the taking - off and landing tracks. Based on the analysis of the routes of the new aircraft, this paper makes a comprehensive emendation to the original obstruction requirement, which has been adopted in the newly published << Military Airfield Clearance Rules >>.

Abstract:Based on the analysis of present aircraft structural life index and its determination, the concept of Aircraft Structural Life Envelope (ASLE) is presented, as well as the approach to the establishment of ASLE. The schematic diagram of ASLE is given based on the total life and the time interval between overhauls. The establishment of ASLE will pave the way for the structural life ( i.e. fatigue life and calendar life ) supervision for individual aircraft.

Abstract:Based on system reliability simulation theory, using the method of computer simulation, the paper analyzes the effect of RMS on the equipment using in combat. Simulation model of RMS is built and the method of real time simulation is put forward.

Abstract:From the point of view of basic principle of flight simulation, according to the principle that physical model and merit ability are unified with each other, and with a comprehensive application of the object - oriented technology and modularization design thought, the model building of fighter flight simulation has been studied in this paper. The simulation results have verified the effectiveness of the method of the model building of fighter flight simulation given in this paper.

Abstract:With the development of flight simulator, how to make use of single flight simulator to perform a more complex flight simulation task becomes an urgent problem in the research at present. According to the process of developing the HLA - based on simulation application system, a complex flight simulation system which has a different kind of simulator interoperability is presented, and two key techniques in realization of the system are analyzed in this paper.

Abstract:UAV - UWB communication link model is proposed in this paper based on UAV relay model and special UAV channel condition. And the influence of the Doppler frequency shift on UAV - UWB communication link is analyzed and simulated. The result shows that the Doppler frequency shift has a negligible impairment to the performance of UAV - UWB communication link.

Abstract:This paper analyzes the crack initiation and fatigue propagation at the edge of a dilution hole in combustor's liner at high temperature. A plane model with a crack at the edge of a round hole is built at high temperature and under anisothermal condition, and the numerical simulations via finite element method at stable temperature and transient temperature are performed respectively. Furthermore, the comparison between evaluations of stress intensity at crack tip respectively by J- integral and C (t) - integral is made. According to the analysis, it is found that there is evident difference between the results J - integral and C (t) integral under the conditions of stable and transient temperature. This phenomenon is tentatively discussed for the judgment of the crack fatigue propagation.

Abstract:For Decouppling Mechanism, a principle is presented and a model is constructed. When positional and velocity disturbances are exerted, the control system is imitated with the MATLAB in this test. The results of simulation show that the gondola control system achieves the desired results.

Abstract:Based on the conventional construction of microstrip slot antenna, a new wide band microstrip circle - slot antenna is designed, which is fed by a fork - like microstrip line. Better matches can be achieved through adjusting the dimensions of chief - arm and side - arms in feeding net. The results of simulation and test show that 32.5% bandwidth (VSWR < 1.5) can be obtained at the center frequency of 2 GHz.

Abstract:Based on the theoretical analysis of IFM, an IFM receiver is simulated by using MATLAB program and the simulation results tally well with the experimental results, which validates the IFM's superior ability in measuring low SNR signals.

Abstract:The paper constructs the remote monitor and control system on the ammunition storage based on Web by applying the theory of Neural Network - Fuzzy Reason ( NN - FR ) and the technology of the programmable logic controller (PLC). The system can monitor and control the real -time data of the temperature and humidity of the environment and ammunition storehouse. It achieves the automation and the intelligence of the ammunition management as well as improves the reliability and the economic benefit of the ammunition storage.

Abstract:An improved power control algorithm is proposed based on the associated coefficient in CDMA system by analyzing the traditional power control algorithm. In this algorithm, both the power vectors and filter coefficients are renovated. The simulation result shows that when the total transmission power is definite, users can obtain a higher SIR, at the same time, the users' transmission power is reduced distinctly compared to the traditional algorithm and the capacity of the system is also improved.

Abstract:In this paper, broadband wireless LAN (WLAN), the representative model of broadband wireless IP network, is taken as a target of the research and analysis. The influence of the variation of transmission power and data rate on the bit error rate (BER) performance of the broadband modulation schemes in a typical indoor application environment of non - cell wireless communications is explored and analyzed. An associated power - rate control scheme is presented based on the analysis and the practical design consideration.

Abstract:This paper studies a contention resolution strategy in OBS networks, i.e. deflection routing, and puts forward both the approximate and the accurate models for the data loss analysis of single OBS node with and without wavelength conversion.

Abstract:TCP's main processes are discussed in this article. Then, the relevant schemes of implementing simplified TCP in embedded system are presented. This kind of scheme is implemented successfully in the system based on DSP and NIC. Using this kind of frame to implement embedded TCP has the advantage of high reliability and low cost.

Abstract:This paper develops a lifting scheme based on the recursive filtering of signals. The lifting scheme proposed operates with IIR filters and is different from the conventional lifting scheme. The lifting construction exploits prediction operator and update operator design based on the interpolation discrete splines in a spatial domain. The proposed scheme is based on interpolation and, as such, it involves only samples of signals and does not require any use of quadrature formulas and is more suitable for signal processing. Finally the performance of the algorithm is discussed by comparing the transform with the wavelet transform B9/7on denoise of two - dimension test images according to soft threshold of wavelet coefficient. The former outperforms slightly the latter. The advantages of lifting scheme lie in its flexibility in design and the lower cost in computation.

Abstract:The current methods of risk evaluation on information security are basically related to qualitative or semi-quantitative ones. So, in this paper, by using a method of probability risk analysis, analyzing the fundamental reasons why network systems are attacked through fault tree, making a serious study of the essence of network composition and of the different types of system vulnerabilities, and classifying the consequences of network attacks, a quantitative model of information security risk assessment is proposed.

Abstract:To the particular scores of interfaces in Visual Prolog, the specific functions and effects of mechanisms of support qualifications and open qualifications are analyzed and investigated in detail on the basis of study of principal issues of mechanisms of these qualifications. First, the fundamental notions of interfaces and objects are expatiated. Then, the functional mechanisms of support qualifications and open qualifications are exposed with a detailed analysis. Finally, the essential characteristics and application mechanisms of the interface score qualifications are exposed and illustrated through an instance.

Abstract:A traditional functional model is not a better representation for parallel test system because of its low level of abstraction. By raising the level of abstraction from the function - level to the object - level, object-oriented approaches can provide a better model of parallel test system. The Unified Modeling Language, or UML, is a third - generation object - oriented modeling language. And Rational Unified Process ( RUP ), which is developed and maintained by Rational Software Corporation, is based on UML, and can form a modeling approach together with UML. In this paper, object - oriented model of parallel test system will be built according to Rational Unified Process (RUP). Accompanied by RUP, a series of analysis and design documents in modeling standardization, which describe parallel test system in UML, will be formed. These documents make a contribution to the engineering realization of parallel test system.

Abstract:The method of the Reassignment for suppressing the cross-terms is introduced in this paper. With this method and WHT, a new Time - frequency distribution - RWHT is proposed. The results of computer simulation show and verify the validity of the distribution in suppressing the cross-terms and improving the detection capability of Time - frequency Distribution.

Abstract:By using the present technologies of database and information integration, in accordance with the status quo and reality demands of test system, the paper analyzes and discusses the information integration problems of synthetic test system. Two kinds of solutions are put forward, one is data conversion based on database technology, and the other is information exchange based on XML. The corresponding implementation methods are given out, furthermore, the information integration of test system is designed by using these methods. Among them, the former is relatively easy and convenient to implement and the latter has wider universality.

Abstract:On the basis of generalizing the traditional calculus to discrete time series, a new GM (1,1) model is established. In the end, two open problems, which are in desperate need for solution, are posted.

Abstract:The reliability-growth testing is an inevitable project item for increasing the reliability of product in the process of developing products. The Gompertz model is usually used to estimate the data of the reliability-growth for success-and-failure test, but it shows poor fitness for S-shaped growth data. A least square method of nonlinear regression for modified Gompertz model parameter estimation is brought forward according to Gauss-Newton least square method and multiple linear regression least square method, and the fitness for the modified Gompertz model can be proved by using the data of test.

Abstract:After a thorough analysis of the essence of FOIL algorithm, the paper discusses the way of programming a learner by using Visual Prolog and based on this algorithm, and at the same time demonstrates the key code and experiment results of this method in detail.

Abstract:By means of Sansone's Theorem and Theory of rotation vector fields, differential systems x·=-y(1-ax)(1-bx)+δx-lx2n+1、y·=x(1-ax)(1-bx)