Abstract:In this paper, the multidisciplinary aerodynamic-structure optimization design method of elastic wing based on response surface methodology was performed.M6 wing was choosed as the base wing. The design results show that lift-to-drag ratio was increased 9.25% and structural weight was reduced 4.84%，response surface methodology was accurate enough to satisfy the engineering requirement. It can be concluded that the present method is effective and feasible, and is very attractive for engineering application due to its high design capability.

Abstract:By studying the feature of the curve of the Hurst exponent changing with the time, a method of calculating and judging the average "memorial" range of the chaotic time series, the mean period, is presented in this paper. When the curve is drawn according to the 7 steps give in the paper, you may find that there will be a peak value on the curve. The time point corresponding to this peak should be the mean period of the time series. Some results of the aircraft intactness ratio data by using this method have been approved by the related experts and can surely be used for the ulterior evaluation of the data.

Abstract:The impact loads on the shield of a certain flight data recorder are simulated by dynamic analysis module of ANSYS software, the responses to the stress and the distortion of the shield under the stated impact loads are analyzed. For the aim of the lightest shield, under the restriction of the maximum stress, an optimization model is built. A design for optimizing the wall thick and the arc radius of the shield by BP network is made.

Abstract:During the terminal atmospheric flight phase, the space shuttle is an unpowered glide vehicle. The terminal area energy management (TAEM) system uses energy - range profile to guide the vehicle and control the energy dissipation so as to guide the vehicle onto the safe land window. Based on total energy control principle, this paper gives the range prediction and guidance method for every sub phase of TAEM flight. Simulation results show that TAEM guidance law can meet the requirements of auto landing.

Abstract:An efficient evaluation method of aeronautical equipment support system is presented by using a system engineering theory and an integrated model is established. Based on the above, the index system evaluating the efficiency is put forward and every index's weight is calculated.

Abstract:Track initiation is a precondition to carry out tracking targets effectively. In the paper, an algorithm of track initiation based on clustering and Logic - Basic approach is proposed. First., the data transmitted to the fusion center are clustered, which makes the data in each cluster stand for the same target. Then the center of each cluster is found and taken as the measurement from single radar. By doing so, the track initiation process is simplified. According to the characteristic of targets' movement, an improvement is made in the Logic-Basic approach. Simulation results indicate that the algorithm is effective.

Abstract:On the premise of analysis of the factors that influence the accuracy of position fixing, an error model of the azimuth and elevation measurement is built up by Taylor launch. The calculated example in simulation shows that the established error margin model tallies with the actual situation.

Abstract:This paper puts forward an overall design scheme of guided bomb, proceeding from the engineering application, designs the SINS / GPS compound navigation instrument, presents a design scheme of lengthways and lateral command trajectory, designs the control law of the control system, and finally validates these schemes by half-practicality emulation respectively. The design scheme has been already applied to the engineering practice.

Abstract:Aimed at the problem of target type classification and in the light of the reality of our ground-based air defense army, this paper introduces the principles of target type classification based on Grey incidence theory, presents a model and the scheme of target type classification after analyzing the primary factors which affect airplane type reorganization. The example proves that this model can be used for solving the problem of target type classification effectively.

Abstract:Among the methods of jamming the direction-finding system of the guide head of a missile, twinkle jamming is generally considered a kind of rather available method. To a great extent, the effect of twinkle jamming lies in the distance between the emission sources and the twinkle frequency. This paper presents a new rule to evaluate the jamming effectiveness - least variance - to - expectation ratio rule. And based on this rule optimization algorithm of twinkle jamming by two planes is elucidated.

Abstract:An M - FSM model is proposed for the multi-stage vulnerable operations. The goal of this M - FSM is to reason how the implemented step - by - step operation, or more precisely each step activity within the whole operation, contributes an attack goal. This model can be used in discovering attack paths to critical network resources. From these attack paths the system administrator can then derive an expression for network safety in terms of the initial configuration and take measures to reinforce the network.

Abstract:The purpose of this paper is to study the optimization of troops mobile path according to the two constraints of best time and most survival probability, which is put forward as a multi-objective linear programming problem. First, models of shortest path problem and Dijkstra algorithm are expounded, and then the objective of most survival probability is transformed into the shortest path problem. After that a multi-objective linear programming model is established. And the process pf operation in establishing the model by using STEM algorithm is described. Finally, the model and the algorithm are verified in usability through an example.

Abstract:In this paper, the effectiveness evaluating index system of equipment maintenance support system is established. The index method is employed in the effectiveness analysis of the three key parts included in the system - maintenance detective system, spare part support system and corrective technical equipment support system, and a model of equipment maintenance support system effectiveness evaluation is designed. The model is helpful to evaluating the effectiveness of equipment maintenance support system completely, concretely and deciding its maintenance support level easily and rapidly.

Abstract:Since fuzzy neural network ( FNN ) can integrate the advantages of fuzzy logic and neural networks, it is widely applied to equipment fault diagnosis. A fault diagnosis model based on clustering algorithm and FNN is presented in this paper. The Relationship Clustering Method is used in structure identification, and the network parameters are updated by gradient descent method as its learning algorithm. The result of simulation indicates that the model is effective.

Abstract:To improve the performance of the adaptive scene -based technology for non-uniformity correction, an adaptive non-uniformity correction technology for infrared focal plane arrays based on pre-processing with median filter is proposed. The proposed algorithm has been tested with the video sequences of simulated and real infrared data, reaching high correction levels, reducing the fixed pattern noise and preserving image details. The algorithm has low computational complexity and can obtain an efficient frame by frame adaptive estimation of detector's gain and offset.

Abstract:By using a kind of Ho3+: ZBLAN fiber manufactured by Thorlabs Co., USA, weak cascade oscillation radiations at 3 μm and 2 μm are achieved based on the conventional F-P cavity when the optical fiber is 1.8m in length. The primary experimental result is of great importance to the researches in medical fiber laser field and its applications.

Abstract:The method of moments combined with the asymptotic waveform evaluation technique is adopted in quick prediction of the mono-static radar cross section. The computation results indicate that the AWE technique not only can well approximate the exact numerical solution, but also improve the velocity of calculation and save the calculation time of CPU.

Abstract:This paper presents an RF pulse signal detecting system based on MSP430F1121, the pulse may be high-frequency, low-amplitude and narrow-width. A general design of the system is introduced. The system can effectively detect the pulse signal when pulse-widthτ≥ 0.7μs , duty-cycle D ＜ 1/2000, and its amplitude P ≥―15 dBm. By controlling the time between interruptions, the system can eliminate the influence of disturbance signal efficiency. Experiments have proved that the system is simple in its circuit, effective and reliable in operating performance.

Abstract:On discussing the defects of the traditional voice activity detection method based on cepstrum distance, this paper proposes an improved project. In this method, an accurate SNR estimation is made at first, and the discriminative threshold is fixed according to the relationship between SNR and the threshold, then the accurate end-point can be confirmed, in the end the simulation experiments are made with a lot of noisy speech signals ranging from - 5dB to 20 dB in three representative noisy environments. The result shows that the comparatively accurate speech endpoints can be detected by the above method in different SNR environments.

Abstract:A Turbo coded OFDM ( Turbo-OFDM ) technique is proposed for Ka - band land mobile satellite communication channel. The propagating characteristics of Ka - band satellite communication channel are discussed and LMS channel models are constructed. According to the Ka - band LMS channel model presented by Chun Loo, A Turbo - OFDM system model is constructed, and its performance is analyzed. The results show that the technique is good in performance.

Abstract:This thesis briefly introduces the theory of TCM. By using the Euclidean Weight of error sequences as the coding metric, the algorithm of the Free Euclidean Distance in traditional coding schemes is improved, and the Viterbi Maximum- Likelihood decoding algorithm is optimized by simplifying the calculation of the conditional decoding probability, thus the improvement has been made in the performance of the whole system. Finally, it is verified that this scheme can get higher asymptotic coding gain through MATLAB simulation, which makes the system performance approach the asymptotic limit in theory compared with the traditional scheme.

Abstract:The transform domain LMS algorithm is integrated with variable step - size LMS algorithm and BLMS algorithm, from which a new transform domain variable step - size BLMS adaptive algorithm is presented. The algorithm, which has the advantages of the above three algorithms, can reduce the cross - correlation of input signals effectively and overcome the conflict, caused by the fixed step -size factor, between high convergence rate and low steady -state maladjustment in LMS algorithm, simultaneously it has a better real time behavior. The computer simulation results indicate that the new algorithm has higher convergence rate, lower maladjustment noise and can be applied effectively to the antenna adaptive transmitter - receiver isolation system of jammer.

Abstract:This paper introduces the concept of Universal Identity Authentication Service, the function module and some key problems about it. The designed idea and implementation approach of UIAS based on Web Services framework are expatiated. Meanwhile, an UIAS case applied to the integrated college information system is given to illustrate the operation principle of the system.

Abstract:This paper presents models for computational Grids and parallel tasks running in Grid computing environments. Based on these models, a parallel task-scheduling algorithm for resource co - allocation in Grid computing environments is proposed. The algorithm is effective in identifying the critical resource of parallel tasks and scheduling a task as early as possible when all the resources required by the task are available. Simulation results show that shorter execution time and better performance can be gained by utilizing this algorithm, especially in Grid computing Environments.

Abstract:Based on the features of PC / 104 module - EmCORE - i316VL / C400, a real - time and embedded Linux system is built, which will be used in a test & controlling system for aero - bus. The processes of development are described in detail, which are related to the setup of Linux Kernel, installation of boot-loader, development of GNU tool-chains, and supports of real - time feature. In addition, the principle of selection about file system is analyzed briefly.

Abstract:The conceptions called non-inferior Nash strategies for linear quadratic multi-team differential games are introduced. The necessary and sufficient conditions for its existence are derived. The second objective within each team is investigated in the preconditions of Nash competition between the teams and of cooperation within each team. A static game between the teams for their cooperative weight vectors within each team is established, and the optimal weight vectors of satisfying the equilibrium for the second objectives between the teams are obtained. The open-loop non-inferior Nash strategies of satisfying the non-inferior optimum for the first objective and the equilibrium between the teams for the second objective are developed. Finally, an economic game example in two team systems is presented to illustrate the effectiveness of the strategy.

Abstract:In this paper ，a new property of transcendental integral functions has been proved by making use of Hadamard，s three-circle theorem and a character of maximum principle of integral function f(z) which is defined in circumference |z|=r,i．e．lim[DD(][]n∞[DD)][SX(]M(r)[]M(kr)[SX)]=0,wherek＞1 ．