Using standards to integrate soft real-time components into dynamic distributed architectures

A pervasive application domain today is one in which independently developed real-time components participate in a dynamic and decentralized way from distributed environments. Several challenges arise from this domain, related with participant heterogeneity, transient behavior, scalability or quality of service. The use of standards is important here, where a multidiscipline approach is required. We propose ServiceDDS, a framework that combines different standard technologies to solve the problems related with the integration of components into the described environment. ServiceDDS is based on DDS to support dynamic distributed interactions, XMPP to provide Web access, and RTSJ for real-time performance.     

多个大股东并存下的公司治理研究综述

在不同国家的企业中股权结构有很大差异.多个大股东并存下的股权制衡模式作为一种特殊的股权结构,产生了其特有的公司治理问题.文中主要从多个大股东并存的公司治理效应、对于公司决策和业绩的影响、与公司价值的关系三个方面对国外研究进行了综述,较为全面的总结了前人对于多个大股东并存下的股权制衡的公司治理问题的研究.     

城市规划专业留杭毕业生住房情况调查及分析——以浙江科技学院为例

随着中国城市化的快速推进和房价的日益飙升,大学毕业生在刚毕业几年间的住房问题显得越来越突出。现以浙江科技学院近六年城市规划专业本科毕业生为调查对象,结合多种调研方法的综合运用,通过对其居住足迹的跟踪调查,剖析大学毕业生的住房现状和住房困难问题,探讨公共租赁房这一保障性住房的准入机制及理想的区位分布等议题。     

多重中断程序测试框架

为了解决多重中断的执行不确定性带来的测试困难问题,在多重中断产生并发错误的特点的基础上,提出了一种多重中断程序测试框架.该测试框架通过从外部加载一组合适的中断信号序列控制中断处理程序的执行过程,迫使中断程序经历待测序列,避免了构造复杂的运行时控制环境.实验结果表明,相对于一般的中断错误分析方法,该测试框架能够对顺序程序多重中断环境下可能产生并发错误的时序环境和具体原因进行较为准确地分析.     

Residual strength prediction of multiple cracked stiffened panels

Prediction of the coalescence of adjacent cracks is critical for residual strength estimation of structures under multiple site damage conditions. A methodology successfully developed for the case of crack link‐up prediction of un‐stiffened plates, is extended for the case of typical cracked stiffened aircraft panels. The proposed link‐up criterion is based on the change in the magnitudes of elastic and plastic strain energies of the stiffened panel, before and after the cracks coalesce. The strain energy magnitudes of interest are calculated using non‐linear elastic–plastic finite‐element analysis. For the application and verification of the method, experimental results from the open literature are used. Residual strength values calculated by the proposed methodology are in good agreement with the experimental results. The present criterion provides superior results when compared to the existing and commonly applied link‐up criteria.     

多元回归分析在电热式平板硫化机热板温度场中的应用

分析电热平板硫化机热板温差大的主要影响因素,重点研究热源分布情况对温差的影响.以400×400电热平板硫化机为例,应用多元回归的二次响应曲面模型及其子模型,对热源间距(电热管间距)与热板表面最大温差之间的函数关系进行预测,检验并分析预测结果(拟合曲线)的可靠程度,从而得出较合理的数学模型,即完整二次响应曲面模型.此模型可为工程设计提供参考依据.     

提高高炉清循环冷却水系统浓缩倍数的对策研究

通过对宝钢1号高炉清循环冷却水系统的质能平衡测试和理论分析计算,找出了清循环水系统浓缩倍数偏低的真正原因,并提出了相应的技术措施,所做工作对同类系统有重要的指导意义。     

Omnibus Hypothesis Testing in Dominance-Based Ordinal Multiple Regression.

Often quantitative data in the social sciences have only ordinal justification. Problems of interpretation can arise when least squares multiple regression (LSMR) is used with ordinal data. Two ordinal alternatives are discussed, dominance-based ordinal multiple regression (DOMR) and proportional odds multiple regression. The Q2 statistic is introduced for testing the omnibus null hypothesis in DOMR. A simulation study is discussed that examines the actual Type I error rate and power of Q2 in comparison to the LSMR omnibus F test under normality and non-normality. Results suggest that Q2 has favorable sampling properties as long as the sample size-to-predictors ratio is not too small, and Q2 can be a good alternative to the omnibus F test when the response variable is non-normal. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

宽带无源光网络的类型与比较

介绍典型功率分配无源光网络 (PSON)的功能结构和参考配置 ,阐述各种无源光网络 (PON)的发展现状 ,并结合图例介绍各种PON的工作原理、帧结构以及相关的关键技术 ,分别从标准制定、带宽损失、传输及数据处理等方面分析APON和EPON的特点 ,并对传统的PSPON和WDM PON进行了比较 ,说明WDM PON优于PSPON .对未来网络发展作了展望 .     

MAX197A/D转换器多通道特性在激光电源监控系统中应用

利用了MAXl97的多通道采样特性，实现了高功率激光加工机电源部分的可靠采样，保证采样速度，克服单通道带来干扰，使电源的监控系统可靠工作。