Abstract:The stability test system of aircraft engines is developed by using LabWindows／CVI virtual instrument developing studio and it is made up of test submodules of data acquisition、data processing and data displaying．The test system is proved through actual data test，and the test result reflects the true surge and the inlet pressure distortion of the tested enginesThis test means has advantage over the traditional test means．

Abstract:This paper reviews the development of air induction system of supersonic fighter,expounds some integration design problems of inlet and mainly analyzes the integration design characteristics and excellent performance of the foreign advanced active fighter's air induction system on layout style, structure and the control of boundary layer. All the analysis is based on the consideration of engine's stability. Finally, to the developing or developed fighter of our country, some useful conclusions and inspirations to resolve the stability problems of propulsion system are proposed.

Abstract:This paper analyzes the landing-plans under the different utilization rate of multi-runway airfield and reaches a conclusion of the high efficient landing orderThe result shows that the landing-plans are different according to the different approach density of aircraftWith the increase of the aircraft density of approach,the landing order should be arranged according to the weight of the landing aircraftThe optimum plan is that the medium weight aircraft should land first,and then the giant and the small aircrafts should land on the different runways

Abstract:Fuzzy and grey are the double-characters of the information in supportability assessment and the fuzzy whitenization and grey incidence are effective methods used for solving the problems of data indefindbility and deficient data quantity in modern engineering realm. The new model called whitenization and grey incidence model in supportability assessment is initially presented in this paper. Based on whitening of qualitative indexes, the grey incidence analysis is executed. So, this paper has practical value in improving the accuracy of supportability assessment results and in enhancing the development of supportability assessment.

Abstract:This paper presents a base wave generator in use for airborne inverter power supply,which generates sine wave by filtering ladder wave. Its simple circuit topology, low harmonics and good performance of tracing the output voltage variation of the inverter power supply make it a good base sine wave generator. The paper analyses its circuit structure and operation principle in detail. The experimental result shows that the generator can trace the variation of the output voltage and generate ideal base sine wave.

Abstract:On the basis of analyzing the loads that the solid rocket engine case can bear under high-speed and high-acceleration conditions, the paper sets up a more comprehensive and accurate mechanical model of the case, and advances an effective method of solving model. Thereby, a rational method of strength and stiffness calculation of the case is offered.

Abstract:This paper presents the stuoly on some problems of target assignment in multi-type weapon system，including the killing area determining of ground to air missile weapon systems of multiple target channel、the shooting parameters computing of target(such as airplane and missile) related to every camp、the optimization assignment model building and its solution .

Abstract:A new CFAR detector(CMCAM) based on censored mean(CM) and cell average(CA) is proposed in this paper. Ln this detector the mean value of the local estimations of CM and CA is taken as the noise power estimation.Under Swerling Ⅱand homogeneous background assumption,the analytic expressions of Pd,Pfa and ADT are derived for the detector.The results show that the performance of CMCAM-CFAR detector is better than that of OS-CFAR detector in homogeneous background and multi-target situation.

Abstract:Through analyzing the characteristics of active jamming and studying the characteristics of radar against various active jamming, the synthetic index on evaluating the performance of a radar against active jamming is proposed, a rader combat model is established and its corresponding mathematical model is built up. Based upon system testing method, under the conditions of typically designing the parameters of jammers and its flying traces, the emulating evaluation method is set up.

Abstract:This paper presents the punctured convolutional code that is a kind of codes varying in wide range of the code rates without changing the primary structures of encoders and decoders. The rain fading channel statistical characteristics of ka-band satellite mobile communication system is of Rician distribution which can be described by 3-state Markov chain model; and three kinds of punctured convolutional codes with various code rates are adopted respectively in the model states for the purpose of overcoming the rain attenuations, and achieving the required BER of transmission in the channel model.

Abstract:The overgreat power of side lobe of frequecy spectrum of DMT signal will decline the transmission performance of system in the case of noise environment and channel variationsThe discrete wavelet(DWMT)is adopted to substitute the discrete Fourier transform in DMTThe transmission performance of the system is improved by carefully designing the spectral characteristic of modulation signalThis paper introduces the basic principle of DWMT and analyzes the key techniques of DWMT(bit loading algorithm,baseband filter design,etc)This paper demonstrates that DWMT is superior to DMT in performance by making a comparison in performancee between them and that DWMT Technique has potentialites in broadband access network

Abstract:This thesis reviews the historical background of the technology of Trellis-Coded Modulation, explains the theory and principle of TCM, puts forward the example of Multi-dimension TCM System which is named ABB128 TCM ，briefly relates the theory of “Pragmatic TCM”and discusses the trend of the development of TCM.

Abstract:In this paper a blind beamforming algorithm based on radial basis function neural network (RBFNN) is presented according to the array signal. The weight vector of beamforming is estimated by Doppler information of the signal first, then it is approximated by RBFNN to carry out the blind optimizing beamforming. This method not only can make the computation rapid but also is robust to system error because of the structural advantage that neural network can operate in parallel.The simulation experiment verifies the correctness of this algorithm.

Abstract:This paper analyzes the security character and the defects about the common used 802.11 agreement, proposes a principle of improved dynamic WEP encryption. The extensible security management platform based on security policies of wireless LAN is presented and discussed. The roaming of mobile unit between APs is simply introduced in the end.

Abstract:According to the characteristics of huge traffic network, including many nodes and discrimination of path grade, this paper presents a new methud of solving combination explosion problem in course of huge traffic network shortest circuit search.

Abstract:Network traffic data is very important to the network resource distribution,plan of netwrok capacity,analysis of network service quality,network error monitoring and isolation,and management of network securityThis paper first discusses the model and implementation of network traffic monitoring techniques,and then presents the comparison among and analysis of the three kinds of main network traffic monitoring techniques,finally intrduces the different applicable situations of the three kinds of techniques

Abstract:Based on the study of the two-dimensional moving meshes in dynamic aeroelastic interaction simulation, a three-dimensional moving grid enrichment approach is developed and illustrated in this paper .The key advantage of this approach is that the meshes interpolated in the computational domain is utilized to remap the flow variables from the old mesh to the new. The robustness and efficiency for coupled structure-fluid time marching computations have been emphasized in mesh deformation algorithm. Examples representating 2D and 3D flow problems are demonstrated,which shows the effictiueness of the approach.The results are satisfactory in the case of small amplitude displacement.

Abstract:In this paper ,an applying method of deriving information from a judgment matrix and determining index proportion is discussed .The main idea is that we can structure consistent matrixes by the elements arranged in rows of the judgment matrix ,and collect the exact information of the primary matrix from the consistent matrixes ,and comprehensively deal with the information ,and then determine index proportion .In the end ,the method is explained with an example.

Abstract:Through demonstrating the influence of discrimination coefficient on grey incidence coefficient in the grey incidence analysis,this paper presents some conclusions defined in selecting discrimination coefficient and the improvement in selecting discrimination coefficient and the improvement in selecting the discrimination coefficient in usual grey incidence analysis literature which is changed from

Abstract:Based on the fact that testing times are limited in manufacturing of weapon systems, this paper introduces a method of verifying the mean-square-error in the analysis of experimental data in small-sample circumstances. And the method is applied to the analysis and evaluation of rocket weapon system's firing accuracy. The example verifies that the method is correct and precise.

Abstract:By utilizing the Levinson-Durbin algorithm of modern spectral estimation, the parameters of AR filter with demanded correlation spectrum can be obtained. The output of the filter with the input of white Gaussian random sequences, and its shift sequence then form a pair of Gaussian random sequences with the demanded correlation coefficients, which can meet the occasions of correlated Rayleigh fading channels in wireless communication and radar systems. Finally the validity of the method is proved by simulation results.

Abstract:The three series of PZN-based ceramics 0.75PZN-0.15BT-0.10PT、0.85PZN-0.10BT-0.05PT and 0.80PZN-0.20BT are prepared by the columbite method, and the effect of PbO deficiency in starting raw powders on the phase structure of calcined powders and ceramics sintered with Lead free atmosphere is investigated. At the same time, the effect of PbO deficiency on the dielectric properties is also studied. The results demonstrate that even minor content of PbO deficiency would result in pyrochlore phase in the calcined powders and sintered ceramics. With the increase of deficient PbO content, the perovskite phase content in both calcined powders and ceramics will decrease gradually. The dielectric constant of the three series of PZN-based ceramics is greatly increased with the increment of PbO deficiency, and their peak relative dielectric constant reaches the maximum value with 1% mole PbO deficiency. However, PbO deficiency hardly affected the dielectric loss of the PZN-based ceramics. The increase of dielectric constant results from the enlargement of the size of effective ordered micro-regions and the elimination of PbO film among crystal borders.

Abstract:Wireless electric power transmisson consists of microwave sources or lasers,transmitting and receving antennas,microwave or laser rectifier,etc.,among which the most important device is the rectifier that converts microwave or laser energy into direct current. This is a new and non-traditional method that in general is applied to some special cases, for example,lower military satellite, directional energy weapon in outer space, microwave airplane, solar energy satellite power station,etc.in all fourteen new,significant and potential fields of science and technique.

Abstract:The theory of firm equilibrium is one of the basic micro-economic theories. Modern market competition is shifting from firms to supply chains. The firm equilibrium theory is used to analyze discrete firms and supply chains, which illustrates that the decrease of transaction cost is the main economic reason of competition evolution.

Abstract:This paper presents the nanotechnology,its developing direction,State-of-art achievement in research and its applicationSimultaneously the prospects of the nanotechnology development is proposed