Abstract:As suggested by the title of this paper , the author focuses on the fundamental concepts of systems research,its historical background and knowledge structure. The paper discusses achievements of the systems science made in the ancient and modern times. The author pays a closerlook at different aspects of the systems knowledge.the. philosophy and the current situation and provides a list of established schools of systemic thoughts. The position of systems studies in the scientific history is discussed. Our paper concludes with a description about the future of the systems science and a list of some open problems.

Abstract:The research of time synchronzation of multi - information is very important for flight accident investigation.The source and character of multi - information used in flight accident investigation is analyzed in this paper by the use of a special aircraft as example. The problelJl of time synchronization of multi - information is discussed and the method of time synchronization is given.

Abstract:A simulation model for commonly used mobile aircraft arresting system is established theoretically in this paper. Simu1ation results with three kinds of different parameters of control mechanism show that the model can simulate the true process of aircraft being arrested and be an effective mathematical too1 for design and ana1ysis of the system. This model is run by using SIMULINK software under MATLAB environment.

Abstract:According to thennodynamics theories , a dynamic model of a cetrain engine based on static model is set up . Inertia of rotators and cubage that result in unbalanced work and flow are fully taken into account. A simultating program of the dynamic nodel edited by C is worked out. The simulation results agree with practical operation. It is proved the verity of the dynamic nodel. Then a powerful tool is achieved to investigate such type of engines.

Abstract:This paper is in the light of the backwardness of test means , over - complication in operation and inaccessibilily to the test of the system main performance parameters in the case of arny equipping Helmet Mounted Sight ( HMS) , and extensive researches are conducted on improvement and home manufacture of HMS in No. xx project , to solve the actual problem of maintenance in the army , give a full insight into the principle of HMS and effectively better the utilization and maintenance of military equipment and study on the HMS test system.

Abstract:The paper introduces an aided design software of airport drainage ditch. This software developed with Visual C ++ and AutoLISP language offers much help to the design of airport drainage ditch. It can accomplish a series of tasks such as data processing ,internal force computing and shop drawing making , make the results more precise and make the drawings direct applied.

Abstract:A general theorem for dynamics of the relatively motion of aigid body , when transport motion is translational, is derived by the basic equation of dynamics of relative motion of a particle. Practical applications of the general theorem are introduced. It is shown that the general theorem is meaningful and useful in theoηand practice.

Abstract:Fuzzy mathematics and fuzzy theory present more extensive field than precise mathematics does. In application based on the theory and technique of feedback control , with fuzzy mathematics , many control subjects and processes can inter - exchange fuzziness with preciseison. As result , the inside of system is fuzzy , and its inputs and outputs are precise. This paper gave a kind of fuzzy control mathematical model about temperature invariableness.

Abstract:The limitation of a general firewall is analyzed , and some solutions of enhancing the security of networking systems are presented in this paper. According to the security necessity of larger networks , the paper synthesizes the techniques of packed - filtering Agent and intrusion detection sysytem , etc. ,and designs a new firewall system combined traffic sniffer and intrusion detection. The system considers inner and outer networks separately ,and it has the capability of protecting both them from security attacks effectively.

Abstract:Robust H" controller via state feedback as well as via output feedback for a class of nonlinear systems with uncertainty is discussed by means of two player, zero- sum , differential game. The sufficient conditions of the solution existence for the H" control problems of such case of uncertain nonlinear systems are presented. It is proved that all the controllers proposed in this paper can make the closed loop systems with uncertainty achieve disturbance attenuation with intemal stability.

Abstract:In this paper , the method , which is called Computer Aided Perturbation (CAP) , is used for the optimization design of the multi - stage microwave amplifier circuits. The justified topology structures and required parameters of the circuits are designed automatically by this method , with the aid of the high - speed calculation and logical judgement of the computer. A two - stage microwave amplifier in the band of 2.5GHz - 4.5GHz is designed by use of the compiled design program , and the results are simulated in the microwave circuits CAD software Microwave - Scope , which proves the reliability and utility of the method.

Abstract:To decide the economic life of air defence missile system with definite data of operation and support cost ,a prediction model based on gray system theory is presented. Finally , this model is used to decide the economic life of a set of given equipment , and the result is satisfactory.

Abstract:The optimal firepower disposition is presented for attacking cruise missiles according to our existing weapon equipment and technology level. On this basis , some conception and theorem are introduced to discuss the optimal shooting strategy for the combination weapon to attack cruise missiles in theory and method .

Abstract:Solution to (LEG) Linear Equation Group problem is studied in this paper, and a non - linear iterative algorithm is deduced by using contraction mapping theorem , fixed point theory and related matrix properties. The algorithm has the advantages that do not need matrix transform , including matrix inverse operation , etc , At the same time , it has excellent convergence , strong convergent rate and 'practical application. The experimental results proved that the method is effective.

Abstract:This thesis expatiates the causes of the connection loss produced by single mode optical fiber by making an analysis of loss characteristics of the single mode optical fiber. And the methods of"OTDR" and"4P" are used to measure and treat the connection loss.

Abstract:The compatibility between two types of ILS is analyzed in this paper. The parameters of antenna radiation pattems and input resistances are calculated , and the interactive influence of band harmonics is discussed in the case of two ILS being nearby located. The opiimal installation method may be obtained with the computed data.

Abstract:In this paper , by means of the impulsive control , a synchronization method for Rossller chaotic system is contructed and applied to secure transmission of speech and images. The simulation shows that the method has better performance of robustness and anti - noise than traditional methods in chaotic masking schemes. This method permits a signal with larger amplitude which is more than a match for driver - response , APD and coupled synchronization methods.

Abstract:This paper presents failure pattem of satellite' data stations. The basic maintenance method was clarified.According to the experience of maintenance ,a few problems proposed in this paper have aroused attention. The method has reference for the maintenance of the VSAT data stations in Air Force.

Abstract:in packet radio network , the performance descends along with the expanding of network scale and nodes quantity. In this case , the nodes need to be clustered. This paper is concerned wifu clustering algorithm of packet radio network. An a1gorithm is proposed , which can be used in tactical situation. C1uster management is a1so explored in this paper.

Abstract:Clinical diagnosis is often supported by the accurate registration and fusion of CT and MRI images. In this paper , a distance transformation (DT) is applied to the verge of the natural brain tissue in the CT image, firsuy.Then the registration is accomplished by using the verges of the natural brain tissue in MRI - T1 and MRI - T2 images as polygons. As a result , the fusion of the complementary information in the CT and MRI is achieved. The algorithm used in this paper is applicable to the registration of CT and MRI images. At the same time , it can be a reference for the matching of other medical images such as SPECT ,PET and DSA.

Abstract:Based on the introduction of mobile agent , the advantage of intrusion detection system using mobile agent technology is elucidated , and a mobile agent based intrusion detection system( MAB - IDS) is presented in this paper. The paper discusses the architecture of system in detail , as well as the means of intrusion detection and its working principle. By comparing with other systems in this area of research , It is concluded that the application of mobile agent technology makes MAB - IDS have a better capability of intrusion detection.

Abstract:This paper has introduced some basic concepts about QoS , and the several techniques , such as Integrated Services , Differentiated Services and MPLS of QoS. Their advantages and disadvantages are also compared. Finally , the traffic engineering and the unsolved problems about guaranteeing QoS of Intemet services are mentioned.