城市电网规划中存在的问题及应对措施

通过对目前城市电网规划和城市规划中存在的问题进行分析,提出了几点做好城市电网规划的措施,并对城市电网规划未来的发展提出了一些建议.     

基于启发式Warshall-Floyd算法的城市综合管廊配套电网规划方法

电力管线纳入综合管廊是我国城市管线建设发展方式的重大转变,开展综合管廊配套电网规划方法研究具有重要意义。本文提出了一种基于启发式Warshall-Floyd算法的城市综合管廊配套电网规划方法,涉及新建线路与改造线路两类规划方法,讨论了电力线路入廊时序确定方法,最后提出了一种综合管廊与电力线路双维度的规划结果输出方式。案例分析在贵州省某山地城市综合管廊配套电网规划中展开,利用MATLAB软件,验证了所提方法的有效性及实用性。可为综合管廊配套电网的合理规划提供一种新思路。     

一种高效的电子政务系统的设计与应用

计算机网络技术的出现,全球信息化改变着人们的生活方式,世界各国高度重视发展电子政务,它是一个国家及城市竞争力水平的标志之一.在这样严峻的社会形势下,建立一个高效的电子政务系统是十分必要的.首先,分析了建立电子政务系统的必要性、特点、功能;然后,提出了电子政务系统的体系模型,设计出了功能结构图和网络结构图,详细地描述了方案思路;最后,把此模型应用到商洛市旅游行业中,经过调查数据研究分析,政务系统的出现给旅游业带来巨大的变化,整个城市的经济、影响力大幅度上升.     

城市电网配电自动化系统技术分析

电能的正常供应与人们的正常工作与生活关系密切。电网自动化能够有效维持电能的正常供应,同时节约能源,这对于城市电网具有重要意义,因此,城市电网配电自动化是当前电网技术发展的必然趋势。笔者就对配电自动化系统进行了简要介绍,并对目前配电自动化所遇到的问题进行了分析,提出了相应的解决策略。     

宽带网络经济视角下城市与农村云网络规划需求的短期负载预测研究

城市与农村宽带网络化是新世纪我国城市与农村经济社会发展的战略性公共基础设施,发展城市与农村宽带网络化对拉动有效投资和促进信息消费、推进发展方式转变和建设小康社会具有重要支撑作用。该课题选取了重庆市统筹城乡与农村产业结构GDP、重庆市统筹城乡与农村产业结构人口数、重庆市统筹城乡与农村产业结构单位GDP宽带网络化碳排放作为变量,然后通过利用对比分析农村与城市网络化短期负载预测结果,认为我国城市与农村云网络规划市场需求可促进城市与农村宽带网络化经济目标的实现,同时应以城市与农村云网络规划市场为数据中心,以云计算为基础进行城市与农村信息网络化能源结构体系调整;预计到2020年,我国城市与农村宽带网络化基础设施发展水平与发达国家之间的差距将大幅缩小,国民充分享受宽带带来的经济增长、服务便利和发展机遇。     

城市配电网建设与改造若干问题浅析

经过近年来电网建设的快速发展,十堰市电网已具有一定的规模。但是,随着区域城市化进程的加快、地方社会经济的快速发展和居民用电水平的不断提高,城市电力需求仍在快速增长,对配电网的建设与改造提出了新的要求。结合十堰市的特点,在分析配电网建设与改造存在问题的同时,提出一些城市配电网建设与改造的具体措施。     

城市电网规划存在的问题探讨

现在人们的生活和城市的发展已经离不开电力,无法想象没有电,我们的生活将是怎样。所以城市电网的规划对一个城市有着极为重要的作用和意义。一个好的城市电网规划,能给整个城市带来良好的经济效益和社会效益。因此,人们十分重视城市电网规划。而在电网规划过程中,对问题的探讨是一个必不可少的环节。     

改进启发式蚁群算法求解电网规划优化问题

研究了电网规划的优化问题。针对传统电网规划问题在计算过程中,由于物理参数和特定参数取值的广泛性,使得对整个电网网络全局搜索能力较差,收敛速度较慢,易出现陷入局部最优和停滞现象。为了解决上述问题,提出一种改进启发式蚁群算法求解电网线路规划问题。改进算法先建立电网网络体系模型,利用启发式蚁群算法对全局进行搜索,并通过信息素挥发因子的动态参数调节以提高路径的搜索能力和搜索概率,提高了对全局搜索精度,并要求对搜索路径进行求解并反复迭代,对局部更新方式进行重新组合,从而确定了电网网络线路规划问题的最优解。仿真结果表明,在求解过程中可以有效地提高计算精度,加快全局收敛速度,降低了计算的复杂度,增强了电网网络的鲁棒性和稳定性。     

浅议城市色彩规划设计的意义及措施

由于对城市形象与建筑色彩的规划认识不够、新材料的滥用和色彩的普遍模仿,导致城市形象混乱,与城市的地域文化特色和社会生活相脱节。文章通过对城市形象与色彩之间的关系进行重新审视,就其两者关系的发展意义进行简要分析,引出城市色彩概念内涵的同时梳理提出城市色彩规划对未来城市发展的影响,更全面有效地对城市色彩规划、管理展开系统研究,以便很好地纳入城市规划设计,成为有机组成部分。     

基于扩展知识结构图的智能教学规划

智能教学规划是智能教学系统的核心组成部分,领域知识模型、教学方法模型以及学习者模型是智能教学系统的三个要素。提出了扩展知识结构图(ExtendedKnowledgeStructureGraph,EKSG)的概念,通过扩展知识结构图将领域知识模型、教学方法模型、学习者模型有机地结合起来。在此基础上,给出了根据扩展知识结构图制定学习者关于学习目标的最优教学规划算法,规划算法由两部分组成:判定算法JUDGE和最优规划生成算法TPLAN,其中JUDGE判断规划问题是否有解,在有解的情况下求出最优解图,TPLAN根据最优解图计算最优规划。证明了算法的正确性,分析了算法的效率。     

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     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

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。