Abstract:This paper analyzes the characteristics of fighter guidance and gives five attitudes determining its decision-making, i.e. guidance time, distance to enemy fighters, energy, adaptive degree to object type and adaptive degree to object maneuver, then studies priority order, and at last establishes math model of guidance law decision based on optimum order method. The decision model can be use to solve the guidance law decision problem in static initial condition effectively.

Abstract:This paper studies how to deal with an emergency procedure in the event of a certain engine failure in the process of take-off run and proposes an algorithm, i.e. an iteration searching algorithm to calculate the resume take-off decision velocity and programs the aircraft resume take-off decision velocity calculation. Furthermore, four kinds of resume take-off decision velocities of a certain aircraft are computed. The results indicate that the iteration searching algorithm is effective in calculating the resume take-off at decision velocity.

Abstract:This paper calculates the loading stress and surface deflection of flight strip thin layer asphalt pavement with the finite element of three-dimensional isoparametric element, analyzes the effects of the subgrade resilient modulus, the base resilient modulus, and thickness in the completely continuous interface condition. Results indicate that the semi-rigid base underside flexural - tensile stress almost has linear change with the subgrade resilient modulus, the base resilient modulus, and thickness. The surface underside is pressed, and the stress has very small change, which is not effected basically. The surface deflection has linear change with base thickness and curve changes with subgrade resilient modulus and base resilient modulus.

Abstract:The calculating formula of shrinkage and tension stress of the pavement is set up on the basis of the friction between slab and base. The temperature of slab affected by the change of environment is analyzed and the calculating formulas of the stress distribution in day and year are deduced. The formulas can be used to calculate the shrinkage and tension stress of large size cement concrete pavement, and the correctness of the formula is verified by the test of large size pavement at a certain airfield.

Abstract:To suppress the Flutter of aircraft with model parameter uncertainty, the longitudinal flutter suppression robust control law of the aircraft is designed based on the μ- synthesis method, whose performance weighted functions are optimized by PSO, and the order of controller is reduced via balance truncation. In this paper, the robust performance weight functions are given. The simulation shows that the control law designed withμ- synthesis is stronger in robustness and follows the desire command response more precisely.

Abstract:The slew control strategy of air defense phased array radars can affect the air defense missile system's operational effectiveness markedly. The effect on firing conditions of phased array radar by changing the pointing direction of phased array antenna in azimuth is analyzed, and an approach whether to put the slew control strategy into practice as well as a slew control method used in air defense target assignment is presented to achieve sufficient intercept performance. The method given in this paper is demonstrated by simulation application, the results show that the dynamic control of air defense phased array radar can significantly improve the operational effectiveness of the air defense system.

Abstract:Aiming at jamming target space locating, this paper deduces a mathematic model of direction measurement based on two radars, puts forward the issue of interpolation synch calculation, studies the track of level fixed - velocity straight target, analyzes the change law of pitching angle and azimuth angle and establishes a proper rational interpolation - simple reciprocal interpolation as the synch calculation function. In this way, the data sent from the two radars are identical in time, and the locating precision is improved. The model established in this paper is of engineering application value.

Abstract:An algorithm for maneuvering target tracking using multi-resolution analysis is studied in this paper. The observation data of the mono-resolution are decomposed with the use of a classical algorithm in wavelet transform, Mallat algorithm. The decomposing results are then used to update the states of the target. Simulation results show that the algorithm is perfect in target tracking and economical computation.

Abstract:A fusion algorithm for millimeter wave (MMW) radar and infrared (IR) sensor is discussed in this paper. Modified extend Kalman filter (MEKF) is simple yet very effective in accounting for the measurement of non-linearity. On condition of combining MEKF with sequential filter, the optimum state of maneuvering target is obtained. The target is tracked with MMW radar using MEKF, and then the filtering results are fused with information from IR sensor through sequential filter. In this way, the global state is updated at the fusion center. Simulation shows that the novel method can significantly improve the state estimation precision of composite guidance system and strengthens the adaptability of the tracking system to environmental changes.

Abstract:In view of characteristics of pressure sensor affected by temperature changes and voltage fluctuation, a correction model of pressure sensor is presented based on Support Vector Machine. The approximate ability of the SVM to any nonlinear function is utilized to drill the correction model, so as to enable it to be setup at different temperatures and voltage fluctuation, thus allowing the sensor output to be in a nonlinear mapping relation to the voltage values the sensor actually sensed. The experimental results show that maximum relative fluctuation comes down from 22.2% to 0.64%, and the model can not only eliminate the influence from temperature and voltage fluctuation, but also can obtain the expected linear output from the output terminal of correction model.

Abstract:This paper studies the optimum problem of aerial defense equipment on the basis of system theory. By way of system state describing, structure analyzing design and quantitative relation control, a model is established based on system dynamics theory to evaluate campaign efficiency of aerial defense system. Simulation result shows that the method and the model are reasonable, effective and applicable for optimizing aerial defense equipment.

Abstract:Some probability models of strategy force disposition and the description are discussed and through the analysis of the knowledge about the force disposition problem, a mathematical model of force disposition based on probability is given. And, at the same time, some valuable topics are pointed based on the theory of stochastic force disposition in the end.

Abstract:In order to obtain the maximum efficiency of defense engineering and improve the efficiency of national defense capital and making use of it, a gray incidence analysis combined with value Engineering is introduced into evaluating the value of defense engineering construct project according to the complexity of defense system. Through determining the weighting of factors, the best construction projects selecting can be realized, the cost is reduced, the technique innovation can be accelerated and, the military benefit and the economy benefit of defense engineering can be enhanced.

Abstract:In this paper, the laws of motion about interaction of shrapnel and shock wave under condition of blast are researched. First of all, calculating assumptions for numerical analysis are given, and the laws of motion of shrapnel and shock wave are analyzed respectively. Then, current formulas are simplified. The conclusion can be used to respectively compute the time order and time difference, in which structures suffer from shrapnel and shock wave. The results show that the algorithm is effective.

Abstract:A unified strategy for dynamic mapping in grid computing environments is brought forward. Immediate mode and batch mode are symbiotic and can switch adaptively in this strategy, and MCT for the immediate mode mapping and an improved Sufferage algorithm for the batch mode scheduling are utilized. And the utility functions meet the requirements of diverse QoS of tasks. The experimental results indicate that the improved scheme is superior to the benchmark algorithms in performance and adaptable to the varying task flow in grid computing environments.

Abstract:In view of actual warfare facts a new method of the threat evaluation based on the OWA operator is put forward. Through the method of unifying preference information into the utility value form, and the subjective preference information of decision-making group is aggregated by the OWA operator. Then the threat evaluation model integrating the subjective and the objective preference information is established in the paper. The attributes weight can be calculated by a quadratic programming model. The degree of threat can be obtained through the decision-making models. The threat evaluation method is in accord with the actual war process. The validity of this method is demonstrated in an example.

Abstract:This article simulates the coupling processes of electromagnetic pulse into a cavity with a slot, and utilizes the uniaxial anisotropic perfectly matched layer (UPML) as absorbing boundary condition to truncate the calculation region by a finite difference time domain method (FDTD). According to the calculation of electric field and its frequency domain characteristic of some special grids, the rules of electromagnetic pulse coupling into a cavity with a slot are obtained. The result shows that uniaxial anisotropic perfectly matched layer is effective in serving as absorbing boundary.

Abstract:In view of actual environment of carbon nanotubes-field emission display, the electric field and electric potential distribution of single vertical carbon nanotube, including 45o with the same length of the vertical one and 45o with the same height, are calculated respectively. The results indicate that the electric field intensity's ratio for the three types of carbon nanotubes is about 13 : 10 : 12. The further analysis shows that if the uniformity of field emission is desired to obtain improvement, the height of inclining carbon nanotubes should be increased on condition that the vertical and inclining carbon nanotubes exist simultaneously in the cathode of field emission display.

Abstract:Based on the RLS algorithm, a multi-element uniform linear antenna array algorithm is proposed by using DSP and distributed shared memory. The fundamental and some characteristics of the proposed algorithm are briefly discussed. And then aimed at the characteristic of TMS320C6416 digital signal processor and the convergence capability of RLS - based algorithm, the realization of this smart antenna algorithm and the optimization algorithm are discussed. Simulation shows that this algorithm meets the real - time requirements of 16 element uniform linear antenna array that 2048 point 8 bit 8 KHz sampling.

Abstract:As an important member in biometrics technology, iris recognition can be performed widely in the application future and has a wide market development future, particularly in the security for certain place or resources. In this paper, a new algorithm for recognizing irises is proposed, which utilizes Kernel principle component analysis (KPCA) to extract iris texture feature and adopts competitive learning mechanism to recognize. Experiment results show that the algorithm is efficient and adaptable to environment. Therefore, it is of significant value in application.

Abstract:Larsen fuzzy reasoning algorithm is intuitively extended in this paper. Firstly, the fuzzy relation (FR) of Rp that is defined by Larsen is intuitively extended. Secondly, the intuitional fuzzy generalized modus ponens formulas and intuitional fuzzy generalized modus tollens formulas of IFR Rp are deduced. Finally, an instance is given to depict the detail of logic reasoning and computing, which verifies the validity of this method. The result shows that the intuitively extended Larsen FR algorithm is a better IFR algorithm.

Abstract:Binary solid solutions 0.7 BiFeO3 - 0.3 BaTiO3 - x mol% La203 ( X = 0.6, 0.8,1.0, 1.2 ) are prepared by the traditional ceramics process. The phase structures of all ceramics samples are of pure and steady Perovskite phase, and no other phases are found. With the increase of La doping amount, the grain size of the ceramic is decreased, the Curie temperature is gradually dropped. The coercive field of the samples is decreased and the dielectric loss is gradually lowered.

Abstract:The characteristics of multiplier AD633 are introduced. The balancing machine of which the design of multiplier AD633 is adopted realizes the multiplication of non-counterbalance and simultaneously the test for time-consuming performance is conducted. The results show that the work efficiency can be tremendously improved by using AD633 multiplier. Moreover, the direct current output signal of related multiplication is helpful and convenient for the further processing, which can also be used in dynamic balancing machine and other ones.

Abstract:Under the virtual battlefield environment background, aimed at the special request in the terrain visualization, this paper calculates the terrain data by using the Newton interpolation algorithm which should be supplemented, and carries on the optimized choice using the genetic algorithm in the interpolation data. The test result shows that this terrain data interpolation method is simple, fast, practical and without information distortion.

Abstract:A class of systems of impulsive delay parabolic partial differential equations with nonlinear diffusion coefficient is considered. By using Green's formula, vertical additive method and impulsive delay differential inequalities, sufficient criteria for oscillation of all solutions of such systems are obtained under Robin boundary condition. The results fully reflect the influence action of impulsive and delay in oscillation.