Application of Hierarchical Modeling and Analysis Method in C4ISR System

C4ISR系统是一个规模庞大、层次分明的离散动态系统,文章提出了一种面向C4ISR系统的UML和Petri网结合的建模分析方法。该方法采用从上到下的层次分析方法,用扩展的UML模型对系统组织结构和系统的静态特征进行描述,用扩展的Petri网模型描述和分析系统动态特性,通过相应的规则将Petri网模型转化成状态图和序列图。新方法可以对系统要求进行验证,同时还可以编程实现。最后通过该方法,对一个C4ISR系统进行了建模分析。C4ISR system is a discrete dynamic system with large scale and clearly hierarchy,this paper presents the modeling and analysis method combining UML with Petri net for C4ISR system.This approach adopts a hierarchical analytical method with top-down techniques,describes the whole systemic structure and static property through extended UML model,shows systemic dynamic characteristic using extended Petri net then transforms to the correspondence state diagram and sequence diagram.New methods verify system requirement and easily realize its code.At last the approach is illustrated by its application to C4ISR system.国家“十五”计划基金资助项目(40405010101C

multilingual web architectures and implementation

简化多语言Web网站服务的管理与开发。在实践中，管理与开发多语言网站的大部分工作是保持网站的各种信息之间相互独立。在开发与管理多语言网站的过程中有许多与人相关的角色，如设计人员、实施人员（如程序员）、系统管理员、翻译人员与用户等角色。按照这些不同的角色对网站的各种信息进行严格分类，并保持在同一个网站中这些分类后的信息相互独立，也就是说负责翻译的人员不需要看到脚本语言，如JavaScript。同样，图形设计人员也不需要精通多种语言，也不必在多种语言环境中工作。从以上方面论述如何设计及实现多语言网站．中国中文信息学

战国时期古币金属组成试析

我们对战国时期燕国的"oD"字刀币、齐国的刀币及賹化園钱、魏国的桥足布币以及楚国的蚁鼻钱共163枚进行了化学全分析。进而从金属史与化学史的角度出发,对这几类古币金属组成的特点和演变的原因进行了研究和说明,对战国时期的某些货币制度作了探讨,并提出了一些初步结论

塔里木河中下游荒漠化防治与生态系统管理研究与示范

该项目成果建立了荒漠区生态环境与经济和谐发展的模式，为正确处理生态环境建设与经济发展的关系提供了理论依据；建立了塔里木河中下游土地利用的5种模式和适宜性评价体系；创立了塔里木河中下游生态经济型植被的模式和结构优化配置方案；提出了6项绿洲灌溉农业节水节肥和棉花高产技术；确定了维护塔里木河中下游至大西海子和台特马湖生态安全的最低年需水量、最佳输水期，提出了塔里木河中下游天然植被合理地下水位的科学依据；揭示了塔里木河中下游30年断流输水后地表生态的响应规律；构建了数字塔河的框架，完成了水、土、植被等23个因子的图层

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies