桌面PC数据传输瓶颈分析

桌面PC数据传输瓶颈，是造成处理器速度不能发挥，计算机整体性能提高与处理器主频提升不同步等现象的重要原因之一。本文从硬件层面出发，对目前桌面PC中存在的处理器总线与内存总线的数据传输瓶颈、I／O扩展总线的数据传输瓶颈和硬盘的数据传输瓶颈进行分析，并提出现实的处理方法。     

参数化CAD技术的研究与应用

在研究参数化技术、计算机辅助设计(CAD)技术的基础上,深入研究了PRO／E的参数化建模与特征建模技术,综合考虑了PRO/E与Microsoft visual C 、Microsoft Access接口技术、参数化设计的数据结构与数据传递关系,基于PRO/TOOLINK,对PRO/E进行了二次开发,实现了三维参数化CAD系统的开发．最终,以杆端关节轴承为例对系统进行了设计应用,也为其它产品设计提供了好的借鉴方法．     

基于Lotus Domino/Notes的银行第三代 OA系统的开发与应用

办公自动化是企事业单位信息化建设的一个重要项目，“知识管理”作为一个新兴的概念，使办公自动化有了新的发展思路和更高的挑战，也使得办公自动化系统有了发展的契机和突破点。基于知识管理的OA系统设计与建设是信息化进程的新理念，同时也是信息系统开发技术全面提升的新标志。本文介绍了某商业银行办公系统改造升级为第三代办公自动化系统开发与应用。主要阐述了第三代OA系统的开发环境和开发平台，OA系统的框架结构、系统特点、和系统功能设计。     

IMPEDANCE THEORY AND BANDWIDTH OPTIMIZATION OF THE TWIN-LOOP ANTENNA

The Twin-Loop Antenna(TLA)has been widely used because of itsbroadband property and simply feeding,and some modified structures have been devel-oped from its prototype by Chinese engineers.But the exact design theory for TLA accord-ing to the impedance calculation has not yet been published.In this paper,the impedanceof loop in a TLA is analysed and computed by using the method of moments,and the de-sign formulae and a two-step optimization program for extending the bandwidth of inputimpedance of TLA are detailed.An example of optimized design shows that the bandwidthcan be increased up to 36.4% for VSWR≤1.10,which is wider than the bandwidth of ra-diation pattern.     

综合学习的蓝图(上)——四元教学设计模式

本文对四元教学设计模式做出概述。该模式最初是由范梅里恩伯尔等人在20世纪90年代初期为设计综合能力的培训项目而开发的。本文论述了综合学习培训蓝图的结构及相应的教学方法,其基本观点是:学习任务、相关知能、支持程序和专项操练这四个彼此关联的元素,在综合学习蓝图中是必不可少的。文章讨论了与涉及综合能力有关的基本学习过程相匹配的教学方法,同时提供了"检索文献"培训蓝图的样例。     

Gender contentedness in aspirations to become engineers or medical doctors

Medical doctor and engineer are highly esteemed STEM professions. This study investigates academic and motivational characteristics of a sample of high school students in Thailand who aspire to become medical doctors or engineers. We used logistic regression to compare maths performance, gender typicality, gender contentedness, and maths and physics self-concepts among students with aspirations for these two professions. We found that high levels of felt gender contentedness in men had positive association with aspirations for engineering irrespective of the levels of maths or physics self-concept. We found that high levels of felt gender contentedness combined with high levels of maths or physics self-concept in women had positive associations with aspirations to become a medical doctor. These findings are evidence that student views of self are associated with uneven gendered patterns in career aspirations and have implications for the potential for future participation.     

依法理财确实提高学校财务管理水平

当前，学校普遍存在财务管理薄弱、内部控制制度不健全或执行无效、财经法纪意识淡薄、违法违纪问题时有发生的现象，给国家和学校造成损失。本文从对财务管理的认识出发，剖析了学校财务活动的特点和常见的违法违纪问题，提出了加强财务管理的具体措施。     

A SISO mixed H2/l1 optimal control problem and its solution

Study of the SISO mixed H2/l1 problem for discrete time systems showed that there exists a unique optimal solution which can be approximated within any prescribed missing error bound in l2 norm with solvable suboptimal solutions and solvable superoptimal solutions.     

简单快速判断手性碳原子R/S构型

一种用右手螺旋法来判断手性碳原子R／S构型的方法，在掌握这种方法以后，可逆用这种方法来写出已知命名的含手性碳原子的化合物的立体化学式或Fischer投影式.     

Proteomic analysis of the serum in patients with idiopathic pulmonary arterial hypertension

Idiopathic pulmonary arterial hypertension(IPAH) is a rare disease of unknown etiology.The exact pathogenesis of pulmonary arterial hypertension is still not well known.In the past decades,many protein molecules have been found to be in-volved in the development of IPAH.With proteomic techniques,profiling of human plasma proteome becomes more feasible in searching for disease-related markers.In present study,we showed the protein expression profiles of the serum of IPAH and healthy controls after depleting a few high-abundant proteins in serum.Thirteen spots had changed significantly in IPAH com-pared with healthy controls and were identified by LC-MS/MS.Alpha-1-antitrypsin and vitronectin were down-regulated in IPAH and may be valuable candidates for further explorations of their roles in the development of IPAH.