共查询到20条相似文献,搜索用时 140 毫秒
1.
2.
Web技术与GIS技术更加紧密的结合是WebGIS发展的必然趋势与研究热点.在分析比较现有WebGIS体系结构及主要实现技术的基础上,提出了基于Struts框架和ActiveX控件的实现方法.该方法旨在结合二者的技术优势,构建更为高效、通用的WebGIS体系结构模型.分析了这种WebGIS的体系结构、运作机制及特点,最后介绍了该实现方法的一个应用案例,验证了方法的可行性. 相似文献
3.
基于Globus Toolkit 4的网格多资源Web服务实现 总被引:2,自引:0,他引:2
采用Globus作为事实上的网格基础平台,基于Globus进行网格服务开发是当前开发网格应用系统的主要手段.它提供了网格系统的基础服务,可以构建复杂的网格应用系统.针对GlobusToolkit4中网格服务的实现问题,介绍了单资源服务、多资源服务的实现模型,并以一个简单的网格计算为例,详细地说明了网格多资源Web服务的实现过程,最后成功地在单资源网格服务的基础上实现了网格多资源服务. 相似文献
4.
针对状态空间实现为非最小相位的非线性广义系统的控制问题,提出一种非线性广义系统的状态空间实现算法,构建了一个等价于原输出函数的综合输出函数,能任意配置状态空间实现的传输零点,使该状态空间实现为最小相位的.所构建的最小相位输出函数能直接用于构造状态反馈控制器,实现对非线性广义系统状态反馈控制.将所得结论应用于Logistic增长的SIR传染病模型,仿真结果表明了所提方法的有效性和可行性. 相似文献
5.
Hilderick A. van der Meiden Author Vitae Willem F. Bronsvoort Author Vitae 《Computer aided design》2007,39(8):652-662
Parametric and feature-based CAD models can be considered to represent families of similar objects. In current modelling systems, however, the semantics of such families are unclear and ambiguous.We present the Declarative Family of Objects Model (DFOM), which enables us to adequately specify and maintain family semantics. In this model, not only geometry, but also topology is specified declaratively, by means of constraints. A family of objects is modelled by a DFOM with multiple realizations. A member of the family is modelled by adding constraints, e.g. to set dimension variables, until a single realization remains. The declarative approach guarantees that the realization of a family member is also a realization of the family.The realization of a family member is found by solving first the geometric constraints, and then the topological constraints. From the geometric solution, a cellular model is constructed. Topological constraints indirectly specify which combinations of cellular model entities are allowed in the realization. The system of topological constraints is mapped to a Boolean constraint satisfaction problem. The realization is found by solving this problem using a SAT solver. 相似文献
6.
7.
A. P. Makhort 《Cybernetics and Systems Analysis》2010,46(1):129-139
Equilibrium conditions in an open economic system with monopolies are investigated. The model takes into account the presence
of insatiable consumers among economy subjects. The influence of selection of a tax strategy on the realization of a certain
equilibrium state of the economy is found out. The conditions of realization of an optimal equilibrium state are found. The
model is applied to the analysis of the influence of monopolies on the Ukrainian economy. 相似文献
8.
9.
10.
11.
12.
13.
14.
This work proposes a method to construct a state-shared model for multiple-input multiple-output (MIMO) systems. A state-shared model is defined as a linear time invariant state-space structure that is driven by measurement signals-the plant outputs and the manipulated variables, but shared by different multiple input/output models. The genesis of the state-shared model is based on a particular reduced non minimal realization. Any such realization necessarily fulfills the requirement that the output of the state-shared model is an asymptotically correct estimate of the output of the plant, if the process model is selected appropriately. The approach is demomtrated on a nonlinear MIMO system - a physiological model of calcium fluxes that controls muscle contraction and relaxation in human cardiac myocytes. 相似文献
15.
基于三层结构交易中间件系统设计 总被引:1,自引:0,他引:1
介绍了三层结构交易中间件体系结构的系统实现模型,论述了在该模型下通信层和交易调度层的设计思路和实现方法,给出了交易调度层动态优先级算法的实现思路。 相似文献
16.
介绍了入侵检测系统的基本知识,提出了系统设计的原理,分析了系统模型的体系结构。在此基础上给出了在Linux网络中的入侵检测系统的详细设计和具体实现过程,并对各个模块的设计与实现进行了阐述。 相似文献
17.
.NET平台为分布式Web应用系统提供了良好的开发环境和技术支持,本文结合中经网信息计费系统的项目背景阐述了系统的体系结构设计,运用UML系统建模方法,建立了基于信息产品业务模式的系统模型,并讨论了该模型在.NET平台下的实现。 相似文献
18.
This work proposes a method to construct a state-shared model for multiple_input multiple_output (MIMO) systems. A state_shared model is defined as a linear time invariant state_space structure that is driven by measurement signals _the plant outputs and the manipulated variables, but shared by different multiple input/output models. The genesis of the state_shared model is based on a particular reduced non_minimal realization. Any such realization necessarily fulfills the requirement that the output of the state_shared model is an asymptotically correct estimate of the output of the plant, if the process model is selected appropriately. The approach is demonstrated on a nonlinear MIMO system - a physiological model of calcium fluxes that controls muscle contraction and relaxation in human cardiac myocytes. 相似文献
19.
20.
Methodology for modeling and analysis of supply networks 总被引:1,自引:1,他引:0