基于SimuWorks仿真支撑平台的潜艇作战综合仿真系统研究

潜艇作战综合仿真研究系统是一个用于常规潜艇和核潜艇作战系统研究的一体化仿真平台,它既可以对在役、在研的潜艇作战系统进行效能评估,也可以对新型潜艇作战系统进行设计和试验.该仿真研究系统基于HLA高层仿真体系结构实现,为潜艇作战系统研究技术人员提供一套高效、方便的集建模、调试、运行为一体的支撑环境.同时使用可视化建模平台SimuWorks,由于其具备开放性强、界面友好、功能强大等特点,可以很好地满足潜艇作战综合仿真系统的要求.     

预警机协同潜艇封锁作战建模与仿真

研究潜艇协同作战攻击效能优化问题,由于预警机提供的预警信息不足,在对潜艇封锁作战中影响作战效能。为了解决上述问题,采用统计学方法,统计得出在不同信息质量下潜艇对舰船实施攻击的概率,作为评估效能的依据。提出以预警机测距精度和测速精度作为预警机提供信息的质量标准,对潜艇实施攻击概率作为作战效能评估指标,建立了预警机协同潜艇封锁作战的数学模型和CPN仿真模型。通过CPN Tools软件进行仿真,结果统计得出了潜艇实施反舰导弹或鱼类攻击的概率,表明预警机探测距离是影响潜艇作战效能的关键因素。     

信息化条件下潜艇鱼雷武器系统作战效能评估

该文首先对信息化条件进行了说明,然后分析了作战效能评估的量度方式和模型选取,进而从信息化条件下潜艇鱼雷武器系统的系统组成出发,通过分析潜艇鱼雷武器系统的作战过程得出信息化条件下影响系统作战效能的主要因素,然后采用WSEIAC效能评估模型对系统作战效能进行评估,并给出模型各参数以及参数组成因子的详细确定方法,最后,文章通过给出的一个算例来表明评估结果,即在信息化条件下,潜艇鱼雷武器系统的作战效能得到大大提高.     

作战系统互操作应用效能的仿真评估研究

作战系统互操作是实现多军种联合作战并进而在战争中取得信息优势的关键技术.实现作战系统互操作必须解决的一个问题是互操作的应用效能评估,即评估互操作可以在何种程度上提升作战系统的应用效能.文章旨在通过对作战系统互操作应用效能评估方法进行仿真来证明评估指标体系和评估方法的有效性.仿真系统基于已建立的作战系统互操作的应用效能评估指标体系和综合评估方法,通过Vc 进行了实现.文中给出了仿真评估的运算步骤和计算实例.仿真结果表明了该作战系统互操作应用效能评估方法的可行性.     

基于DIS的网络化防空作战系统作战效能评估研究

网络化防空是未来防空作战发展的必然趋势，对于网络化防空作战系统的作战效能评估是一个值得研究的问题。在军事仿真领域，分布交互仿真越来越多地应用于作战系统效能的评估与分析。文章在分析分布交互仿真及其在作战效能评估方面的作用的基础上，说明了基于分布交互仿真的网络化防空作战系统作战效能评估的一般步骤，介绍了效能评估仿真系统的体系结构与实现方法，对研究基于攻防对抗仿真的网络化防空作战效能评估具有一定的指导意义。     

舰船作战指挥仿真测试系统研究

舰船作战指挥系统是一个典型的复杂大系统,如何构造仿真测试环境对系统的功能、性能指标进行测试是必须研究和解决的问题.为了给舰船作战指挥系统的研制、建设、管理和使用提供试验环境,从装备试验技术发展的角度提出了装备试验对舰船作战指挥仿真测试系统的需求,描述了舰船作战指挥仿真测试系统的体系结构、工作流程、信息关系和主要功能,这将有助于对舰船作战指挥系统的功能、性能指标进行测试以及对其综合作战效能进行分析和评估.     

自行火炮系统作战效能建模与仿真研究

在综合研究国内外效能评估理论和方法的基础上,根据多年来自行火炮发展建设和作战运用的实际需求,建立了对抗条件下战斗、保障、指挥控制等分系统的作战效能及作战系统评估模型。依据可靠性、维修性数字仿真的基本理论,利用Monte—Carlo方法对某型自行火炮战场对抗阶段进行仿真,可以实现自行火炮可靠性、维修性及系统作战效能的动态评估。该方法受评估者的主观性影响较小,为系统效能的动态评估系统的设计构想提出了评估思路。该模型可以为自行火炮系统的方案论证、工程研制、鉴定定型和作战运用等提供决策依据。     

基于集对分析的无人机攻势布雷方案优选

为解决无人机攻势布雷方案优选问题,采用基于联系度的逼近理想解的排序法(TOPSIS)进行求解。在传统评估要素基础上提出无人机综合作战系数来衡量布雷平台影响,并利用联系度刻画备选方案与综合理想方案组成的集对在相对接近程度意义下的同一对立程度。根据特征属性值计算信息熵权,并改进相对确定可能势,以实现无人机攻势布雷方案的综合评估和排序,算例验证了该方法的有效性。     

基于云理论的多功能电子战系统作战效能评估方法

多功能电子战系统是一个动态、多变量、开放的复杂大系统,系统影响因素众多,逻辑关系复杂。因此,对多功能电子战进行效能评估非常困难。对于复杂的大系统,唯一有效处理开放的复杂大系统的方法就是定性和定量相结合的综合集成方法。文章采用定性和定量相结合的评估方法,即云理论方法建立了多功能电子战系统作战效能评估模型,并给出算例说明评估步骤。     

浮标阵形对搜潜效能影响的研究

搜潜效能是评估浮标阵形性能的重要依据.为了研究不同浮标阵形对搜潜效能的影响,以航空应招反潜作战为背景,建立了航空搜潜过程中的潜艇运动模型和浮标布阵数学模型,并结合浮标阵阵无数量、反潜基地距潜艇初始发现点的距离、反潜机巡航速度以及潜艇规避速度的变化,运用Monte-Carlo方法对不同浮标阵形的搜潜效能进行了仿真和比较分析.仿真结果表明,在相同条件下,不同浮标阵形的搜潜效能存在较大差异,单层圆形浮标阵的搜潜效能相对较高.为声纳员优化浮标布阵提供有效的辅助决策依据.     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.