A Rectangular Finite Volume Element Method for a Semilinear Elliptic Equation

In this paper we extend the idea of interpolated coefficients for semilinear problems to the finite volume element method based on rectangular partition. At first we introduce bilinear finite volume element method with interpolated coefficients for a boundary value problem of semilinear elliptic equation. Next we derive convergence estimate in H ¹-norm and superconvergence of derivative. Finally an example is given to illustrate the effectiveness of the proposed method. This work is supported by Program for New Century Excellent Talents in University of China State Education Ministry, National Science Foundation of China, the National Basic Research Program under the Grant (2005CB321703), the key project of China State Education Ministry (204098), Scientific Research Fund of Hunan Provincial Education Department, China Postdoctoral Science Foundation (No. 20060390894) and China Postdoctoral Science Foundation (No. 20060390894).     

Behaviour based on decision matrices for a coordination between agents in a urban traffic simulation

This paper describes a multi-agent coordination mechanism applied to intersection simulation situations. In a goal of urban traffic simulation, we must consider the dynamic interactions between autonomous vehicles. The field of multi-agent systems provides us some studies for such systems, in particular on the coordination mechanisms. Conflicts between vehicles (i.e. agents) are very frequent in such applications, and they may cause deadlocks, particularly at intersections such as crossroads. Our approach is based on the solving of two player games/decision matrices which characterize three basic situations. An aggregation method generalizes to n-player games for complex crossroads. The objective of this approach consists in searching basic two-player matrices for solving n-agent problems. To explain the principle, we describe our approach for a particular case of crossroad with three agents. Finally, the obtained results have been examined via a tool of road traffic simulation, ARCHISIM. We assume also that the global traffic replicates the behavior of agents in different situations.     

Zur personellen Verankerung der IT-Funktion im Vorstand börsennotierter Unternehmen: Ergebnisse einer inhaltsanalytischen Betrachtung

On the Rate of Board Members with IT Responsibilities in Firms Listed on the Stock Exchange: Results of a Content Analysis: This article reports on a content analysis that investigates the rate of board members with IT responsibilities in firms listed on the stock exchange in the German speaking countries. Furthermore, the study ascertains the correlation of six factors – which become evident through content analysis – with the rate of board members with IT responsibilities. A total of 679 annual reports of German, Austrian, and Swiss corporations have been analyzed. The results show that in Germany and Switzerland 26 percent of the firms investigated have a board member with IT responsibilities, in Austria the rate is 23 percent. Additionally, the results show that turnover and number of employees are highly positively correlated with the rate of board members with IT responsibilities. Furthermore, the data show a correlation between industry and the rate of board members with IT responsibilities.     

设计模式在基于SystemC的指令译码模块设计中的应用

SoC上的晶体管集成度在不断增长,系统功能越来越复杂,传统的设计方法已经不再适应现在的SoC设计.为了解决这种不适应性带来的"硬件危机",人们初步探索将软件中的面向对象技术引入到SoC设计领域中.设计模式是面向对象技术的核心,可以给同类问题提供比较合理的解决方案.在对软件中的设计模式进行分析的基础上,将用于SoC中的CPU指令译码模块进行基于模式的设计,并给出了部分实现.     

基于自适应频率规整的鲁棒说话人辨认研究

该文提出了一种基于自适应频率规整的鉴别性特征提取算法。该方法通过对语音频谱的各个频带的鉴别性分析及其量化结果对各个频域进行自适应的频率规整,进行非均匀子带滤波设计提取鉴别性特征;同时在噪声环境下,在特征提取前端进行了预增强处理,解决了测试语音与训练语音失配的问题,保证了特征的正确提取。实验证明,该特征原理简单,稳定性好,对语音内容不存在依赖性,有良好的抗噪性能,并且结合预增强处理是有效的,能够进一步提高辨认系统的识别率和鲁棒性。     

一种基于小波变换的脉搏波速度测量方法

动脉脉搏波速度变化是动脉血管病变的指示剂,因此脉搏波速度的检测对血管疾病的预防和治疗有很大的帮助作用.脉搏波中夹杂的各种噪声干扰会影响测量结果精度.利用小波变换可以去除脉搏波中的各种干扰,实现波形的平滑重构,为提高测量精度打下基础.脉搏波波速的测量精度在很大程度上取决于波速参考点的提取,首次采用二次差分峰值点作为波速参考点,提高了测量精度.临床实验证明,新方法能够有效地分析出脉搏波速度,有助于动脉血管弹性程度的辅助诊断.     

基于Web的通用查询系统平台的设计与实现

研究了目前查询系统以及查询平台的发展现状,设计和实现了一种新型的通用查询平台.该平台可以快速构建Web方式的通用查询系统.在设计和实施过程中,充分采用了面向对象的思想和方法.通过综合利用信息技术,保证了该平台可以灵活快速地构建可定制、高推广性、既友好又安全的Web分布式动态查询系统,较大地降低了Web查询系统的开发成本和维护工作的难度.     

正己烷裂解反应自由基模型的理论研究

采用量子化学法研究了模型化合物正己烷裂解过程,并计算其动力学参数。依据自由基理论,建立由216个基元反应组成的正己烷裂解反应自由基模型,用CBS-QB3法计算链引发和终止反应动力学参数,用MPW1B95/6-311+G(2d,2p)法计算链增长反应动力学参数。根据动力学参数计算结果,忽略相对不重要的反应,将模型简化为160个基元反应。模拟计算表明,在相同的裂解条件下,简化模型模拟结果与完整模型模拟结果一致,各组分相差不大于0.1%wt;建立的动力学模型对主要产物收率预测较好,与实验值相差小于0.7%wt,可正确地预测正己烷裂解产物的组成和各组分含量沿反应管长度的分布,为进一步研究复杂的烃裂解过程提供了基础。     

定量构效关系研究中分子描述符的相关性

分子描述符的计算是定量构效关系(QSAR)研究的基础,也是化学计量学研究的重要内容,在药物化学、环境科学等领域应用广泛。目前可计算的各种分子描述符已超过4 000种,如何选择合适的分子描述符,成为QSAR研究中首先要做的事。本文首先综述了分子描述符的研究进展,然后随机选择10 000余个化合物,利用Cerius2、Sybyl、Dragon软件计算1 600多种分子描述符,最后,采用相关分析和聚类分析研究各描述符之间的关系,相关分析表明,各类分子描述符之间存在较强的线性关系,这种关系通过聚类分析可以直观体现。     

高速公路雾天通行保障与导航系统研究

高速公路雾天行车存在着严重的安全隐患,针对雾天能见度低对高速公路产生的影响,提出了一种新颖的、行之有效的解决方法,并且实现了其主体部分的功能.