Design and Analysis of Terminal Guidance Law for Kinetic Interceptors based on Pulse Engine

A new terminal guidance law is proposed based on a solid propellant pulse engine and an improved proportional navigation method to address the terminal guidance issue for kinetic interceptors.On this basis,the start-stop curve of the pulse motor during the terminal guidance process is designed,along with its start-up logic.The effectiveness of the proposed guidance strategy is verified through simulation.

Study of the Lift Force Induced by An Interceptor on A High-Speed Mono-Hull:The Affecting Factors and Estimation Formula

To find a better way to estimate the lift force induced by an interceptor on a high-speed mono-hull ship,a series of high-speed mono-hull ship models are designed and investigated under different conditions.Different lift forces are obtained by numerical calculations and validated by a model test in a towing tank.The factors that influence the force are the interceptor height,velocity,draft,and deadrise angle.The relationship between each factor and the induced lift force is investigated and obtained.We found that the induced lift mainly depends on the interceptor height and advancing velocity,and is proportional to the square of the interceptor height and velocity.The results also showed that the effects of the draft and deadrise angle are relatively less important,and the relationship between the induced lift and these two factors is generally linear.Based on the results,a formula including the combined effect of all factors used to estimate the lift force induced by the interceptor is developed based on systematic analysis.The proposed formula could be used to estimate the lift force induced by interceptors,especially under high-speed condition.

Capture condition for endo-atmospheric interceptors steered by ALCS and ARCS

This contribution deals with capture condition for interceptor missiles steered by aero-lift control system （ALCS） and attitude reaction-jet control system （ARCS）. With the guidance law derived from bounded differential game formulation, existence condition of capture zone is studied for the case that the interceptor has advantage on maneuverability and disadvantage on agility. For the existence of the open capture zone, ARCS can only close after the engagement terminates. Moreover, ARCS also needs to contribute to maneuverability over the minimum required value. More fuel will be required if ARCS increases its contribution to maneuverability. The minimum required fuel occurs at the tangent point of two curves： the curve of critical parameters and a candidate constraint curve, which is also true even for the complex propellant constrain. The validity of these results is also demonstrated by simulations.

Analysis on Attenuation Efficiency of Lightning Current by Lightning Interceptor

Lightning interception technology is one of the three core technical systems of regional lightning protection theory.Among them,the omni-directional multi-pulse lightning interceptor(hereinafter referred to as lightning interceptor,the same below)has the ability to attenuate lightning current≥40%and significantly reduce the intensity of the spatial electromagnetic field around the lightning point.In order to explore the attenuation mechanism and effect of lightning interceptor to lightning current,this paper analyzed a lightning stroke process at 16:00 on August 19,2022,and tried to explain the attenuation effect of lightning interceptor to lightning current with the physical parameters of lightning stroke.

INTERCEPT OPTIMIZATION OF EXO-ATMOSPHERIC INTERCEPTOR BASED ON GENETIC ALGORITHM

An intercept optimization approach of the exo-atmospheric interceptor is proposed by the middle and terminal flight stages. Firstly, the dynamic models of the exo-atmospheric interceptor in middle and terminal flight stages are constructed ; and the velocity gain midcourse guidance law and the robust variable structure terminal guidance law are designed. Then the optimization parameters and their constraints affecting the intercept performance are determined. The genetic algorithm （GA） with the advantage of global optimization is used to deal with the intercept optimization problem. The performance index of the optimization is composed of the minimum fuel consumption and the minimum miss distance of the interception. Finally, optimization results of GA and the complex algorithm （CA） are compared. Simulation results show that compared with the traditional opti- mization method, GA can converge to the global optimization better in solving the complex constrained nonlinear combinatorial optimization of the exo-atmospheric interceptor, and reduce the fuel consumption and the miss distance.

WebWork中的AOP

WebWork是由OpenSymphony组织开发的,致力于组件化和代码重用的拉出式MVC模式J2EE Web框架.WebWork作为一个实现了IOC的轻量级Web Application Framework一直备受开发者的青睐.在WebWork中还实现了AOP,那就是它的拦截器(Interceptor).中将重点介绍AOP,同时在WebWork下实现一个AOP的一个应用.最后讨论一下AOP和OOP的关系.

基于MADIS的Interceptor技术实现分布系统的数据加密传输

本文结合MADIS的Interceptor技术,探讨了用Delphi开发基于Socket连接的三层分布式应用系统的安全性的问题,并给出了数据加密传输的解决方案。

利用Interceptor实现分布式环境下的负载平衡

CORBA是当前广泛采用的分布式对象平台,它成功解决了异构平台的互操作问题。为了解决CORBA的分布式系统性能,负载分布成为CORBA应当考虑的问题,然而OMG对负载平衡却没有做出任何规范。本文给出了利用OMG的Interceptor进行静态负载分布和动态负载分布的基本模式以及部分应注意的问题。最后,通过试验分析了这2种模式的性能。

J2EE中的EJB容器设计与实现

在从事J2EE开发的过程中,发现一些EJB应用服务器都有着一定的缺陷,因此设计了一个EJB应用服务器。要完成一个EJB应用服务器,有几个核心部分是必须要实现的:服务器的内核EJB容器,以及它的一些基础服务如名字服务、事务服务等等。

基于CORBA的数字监控网络实时数据服务

结合一个电力监控系统基于服务的设计理念,提出了实时数据服务的设计思想;解决了实现过程中出现的问题;利用面向对象的思想将CORBA事件服务和VisiBroker的多种高级应用(Interceptor,Wrapper)封装在实时数据服务中;应用Interceptor和Wrapper测试了系统性能并分析了实现结果;提出了系统改进的设计思路。

软件协同模型中多模式可配置通道的研究

软件协同模型中的控制驱动模型很好地实现了计算与协同的分离,是一种重要的软件协同模型。通道在模型中表示协同部分,具有重要的地位。然而现有的控制驱动协同模型中,通道的设计较为简单,不能满足应用的需求。本文利用软件体系结构将连接子作为第一类实体的思想,提升通道在控制驱动协同模型的地位。首先对软件协同的独立要素进行分解,并使用Interceptor模型表示各个要素;然后对这些独立的协同要素进行组合,提出基于Intercep-tor的组合配置技术,以此对通道进行扩充,提出多模式可配置通道。多模式可配置通道表达能力得到加强,并且集成人员可以对其进行组合配置,以满足不同应用的需求。

基于拦截器技术的中间件结构的设计与实现

介绍了中间件和Interceptor的概念,以及Interceptor作为一种设计模式如何在提高中间件性能方面发挥作用,着重描述了一个应用Interceptor技术的中间件结构的设计和实现。

网上招标系统(NIPBS)及Interceptor技术在其中的应用

介绍了网上招标系统（ＮＩＰＢＳ）的基本流程，并描述了招标系统的网络传输安全机制．利用Ｉｎｔｅｒｃｅｐｔｏｒ技术；结合目前流行的ＣＡ认证、数字签名等技术，较好地解决了网络上数据传输的安全性问题．

Evaluation of bioefficacy ofα-cypermethrin in long lasting impregnated net(Interceptor~) using analytical method

Objective:To evaluate relationship betweenα-cypermethrin residues in Interceptor~? nets by using HPTLC methods and mortality percentage in standard WHO’s method 'cone test' after repeated washings.Methods:Interceptor~? containingα-cypermethrin was provided by BASF Company.The washing procedure and bioassay tests were carried out according to the WHO-recommended methods.Malaria vector,An.stephensi was exposed to impregnated bed net for three minutes and then mortality measured after 24 hour recovery period.Chemical analysis was carried out in chemical laboratory by using high performance thin layer chromatography method.Results:Result of cone bioassay method showed that washing reduced the efficacy of Interceptor~? bed net from 100%in unwashed nets to 15%at 20 washes.After 20 washes,nets contain(61.2±2.8) mg/m^2 resulting 15%mortality in cone test.Killing activity was reduced when nets were washed.Conclusions:Results will provide an essential clue for monitoring and evaluation of bioefficacy of any long lasting impregnated bed net for quality control.Findings of this study will be useful for WHO.local investigators and people who wish to use pyrethroid-impregnated bed nets for malaria vector control.

Evaluation of the Hydrodynamic Performance of Planing Boat with Trim Tab and Interceptor and Its Optimization Using Genetic Algorithm

Nowadays,several stern devices are attracting a great deal of attention.The control surface is an effective apparatus for improving the hydrodynamic performance of planing hulls and is considered an important element in the design of planing hulls.Control surfaces produce forces and a pitching moment due to the pressure distribution that they cause,which can be used to change the running state of high-speed marine boats.This work elaborates a new study to evaluate the hydrodynamic performance of a planing boat with a trim tab and an interceptor,and optimizes them by using an optimization algorithm.The trim tab and the interceptor have been used to optimize the running trim and motion control of semi-planing and planing boats at various speeds and sea conditions for many years.In this paper,the usage of trim tab is mathematically verified and experimental equations are utilized to optimize the performance of a planing boat at a specificd trim angle by using an optimization algorithm.The genetic algorithm(GA)is one of the most useful optimizing methods and is used in this study.The planing boat equations were programmed according to Savitsky’s equations and then analyzed in the framework of the GA-based optimization for performance improvement of theplaning hull.The optimal design of trim tab and interceptor for planing boat can be considered a multiobjective problem.The input data of GA include different parameters,such as speed,longitudinal center of gravity,and deadrise angle.We can extract the best range of forecasting the planing boat longitudinal center of gravity,the angle of the trim,and the least drag force at the best trim angle of the boat.

基于Interceptor的容错ORB原型系统

介绍了基于Interceptor机制的容错ORB原型系统的体系结构和运行机制，说明了 该容错CORBA系统设计中的一些重要问题和解决方案。对该系统的测试表明它能提供基本的 容错功能。

Factor analysis of interceptor capture probability

The capture probability of interceptors has been deeply studied.Firstly,the definition of capture probability is analyzed.It is transformed into calculating the probability that the relative position vector between the target and the interceptor locates in a certain cone.The relative position vector and associated covariance matrix are projected in line-of-sight coordinates,and the 3-dimensional integral of a probability function in a cone is calculated to obtain the capture probability.The integral equation is a complicated expression of probability,and it is simplified to an explicit approximate expression according to some assumptions based on the characteristics of the engineering problems.The approximation precision is analyzed by comparative simulation difference,which indicates that approximate assumptions are reasonable.Utilizing the explicit expression,the characteristics of capture probability are analyzed respectively with the factors,such as the distance between the interceptor and the target,the precision of relative position vector,the maximum capture distance and the maximum field angle of interceptor seeker.

Application of Comprehensive Lightning Interceptor in Highway Toll Station

Expressway toll station is listed by lightning protection experts as one of the five difficult problems in the field of international lightning protection.So far,the direct lightning protection of the expressway toll station is mainly based on the electrical geometry model-rolling ball method.Lightning rod or lightning belt is installed on the high pole lamp of the toll square and the ceiling of the toll island as a flash catching device to intercept lightning.The lightning rod is a section of metal conductor with the tip.From the process of the connection between up leader generated by the lightning rod and down leader of lightning,the lightning rod has the ability to attract the lightning rod,and can prevent lightning strike of the protected objects within a certain range.From the perspective of lightning protection methods and means,lightning protection plays an interception role against lightning discharge,also called interceptor.A large number of practice has proved that the lightning rod plays an important role in protecting the building structure from lightning damage.With the development of electronic information society,the limitations of lightning rod are more and more prominent,resulting in more and more lightning strike accidents.In 2019,China invented a new flash connection device-lightning interceptor that can overcome the limitations of lightning rod and has applied it on expressways,which has achieved remarkable results.In this paper,the physical parameters of lightning receiving process by the lightning interceptor and the lightning rod are compared,and the solution to prevent direct lightning strike at expressway toll station is proposed.

Webwork框架在粉螨亚目螨种分类系统中的应用

在J2EE项目开发中,基于MVC的设计模式能使系统结构层次清晰,而Webwork是当前比较流行的基于MVC的框架之一。本文详细论述了Webwork框架的原理和方法,阐述了Webwork框架在螨种分类系统中的应用,以及它在系统维护和开发效率方面的优势。

Delphi中分布式多层MIS系统执行效率的研究

分布式多层系统由客户端应用程序、应用服务器层、数据库服务器层构成。由于分布式多层应用系统其自身的结构特征及其运行环境,决定了它的执行效率将成为其设计中不可忽视的重点。本文总结了如何使用Delphi所提供的相关技术来提高分布式多层系统执行效率的几种方法。