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.     

一种基于GPS/INS的导弹制导控制系统

导弹要准确的击中目标,制导技术是关键的环节。目前GPS技术的发展和应用,推动了导弹采用GPS/INS组合制导技术的发展。本文设计了采用GPS/INS组合制导技术的导弹制导控制系统,对GPS/INS组合制导技术进行了研究,并对其中采用的卡尔曼滤波算法进行了详细的介绍。     

浅谈TCP/IP的诊断工具

本文首先对TCP／IP的概念及它在国际互联网中的作用给予明确的定义，并详细说明了对TCP／IP协议进行检测的几个诊断工具，例如：PING、NSLOOKUP、ARP、TRACEROUTE等的工作原理及使用方法，阐述这些工具软件在网络运行中的常见提示信息及其含义，以及根据系统提示，应采取的各种措施。熟练掌握和运用这几个诊断工具在网络管理中具有十分重要的意义。     

N125MW型汽轮机调速系统摆动的原因分析及处理措施

本文通过对电厂N125MW汽轮机调速系统全面分析,从油压、油质和机械部件,对影响汽轮机调速系统稳定性的因素逐一判定,查找出造成调速系统摆动的原因,并针对这些影响机组不稳定运行的因素,进一步归纳出克服缺陷的方法或确定系统设备可行的改造方案。     

Tending School: A Forum on the Experiences of Refugee and Immigrant Students in the United States System

This article contributes to the investigation of refugee and immigrant education. As one part of a comprehensive qualitative study, it showcases the school experiences of three students: Quincy, a refugee from Afghanistan who came to the United States at age thirteen; Emily, an immigrant from Poland who arrived at age six; and Maung, a political refugee from Burma who arrived at age eighteen. The school experiences of these students mirror those of many children who come from countries and communities outside the dominant culture of the United States.The framework of investigation is based on the notion that school life for minority children, in this case, refugee and immigrant students, can be examined from a critical and political perspective; that is, contextualized socially, economically, and politically (Apple, 1990). Students who are not grounded in the mainstream culture struggle to get along in school settings that are institutionalized according to the moral, social, and cultural dimensions of society. Critical theorists contend that student voice can become an organizing force to negotiate and construct multiple interpretations of school life within the reality of institutionalized ways of being in school. In this study, a focus on finding and developing student voice offers the possibility of passages between private and public (Miller, 1990) to permit the sharing and envisioning of multiple interpretations of school life for students and for those with whom they interact with in school settings.     

Teacher Scaffolding: An Exploration of Exemplary Practice

While computers have increasingly been used in classroom over the last twenty years, their application has often been mundane; being merely used to reinforce existing educational practices rather than as a catalyst for educational innovation. An effective way to bring about change may be to identify instances of best practice and then study associated strategies that may be useful for teachers trying to use computers in new and meaningful ways. This study investigates strategies used by a teacher deemed to be exemplary at using computers and associated technology in her classroom. It involved observing and recording teaching sessions conducted by the teacher. This paper discusses the learning task, the children's progression through the task and the teaching strategies used. In particular, it looks for instances of teacher scaffolding as a strategy for supporting children working with computers.     

一个无滑滚动的刚体加速度问题的解法

对有关参考书中的错误题解，给出了一个无滑滚动的刚体加速度问题的三种求解方法。     

自拟降糖汤佐治糖尿病32例疗效观察

目的 :观察中药方剂 (自拟降糖汤 )对控制糖尿病病情的治疗效果 .方法 :6 3例糖尿病患者分成A、B两组 .A组在常规治疗基础上加用降糖汤 ,B组予以常规治疗 ,不加降糖汤 .结果 :A组治疗后空腹及餐后 2小时血糖均明显下降 ,差异具有显著性 (P <0 0 5 ) .B组治疗前后空腹及餐后 2小时血糖无明显变化 ,差异无显著性 (P >0 0 5 ) .结论 :降糖汤对控制糖尿病患者血糖确有一定疗效     

试谈大气与大气压

分析阐述了大气圈和大气压强，举例计算了大气圈的质量．