SAm级防撞活动护栏碰撞仿真分析

针对目前高速公路中央分隔带开口处活动护栏防撞等级较低的问题,提出了一种SAm级混凝土活动护栏及一种新型连接装置。基于有限元的方法,建立车辆与护栏的碰撞模型,通过LS-DYNA对车辆与护栏碰撞过程进行求解,根据不同车型的碰撞结果分别在缓冲,阻挡和导向性能上对护栏的安全性能进行评价,其中小型车辆与护栏碰撞后的OIV(Occupant Impact Velocity)值<12 m/s,ORA(Occupant Ridedown Acceleration)值<20 g且车辆没有驶出导向框;大型车辆与护栏碰撞后没有发生穿越、骑跨等现象且车辆没有驶出导向框,均满足护栏安全性能评价标准。     

Variations in Variation and Selection: The Ubiquity of the Variation-and-Selective-Retention Ratchet in Emergent Organizational Complexity, Part II: Quantum Field Theory

If the general arguments concerning theinvolvement of variation and selection inexplanations of ``fit'' are valid, then variationand selection explanations should beappropriate, or at least potentiallyappropriate, outside the paradigm historisticdomains of biology and knowledge. In thisdiscussion, I wish to indicate some potentialroles for variation and selection infoundational physics – specifically inquantum field theory. I will not be attemptingany full coherent ontology for quantum fieldtheory – none currently exists, and none islikely for at least the short term future. Instead, I wish to engage in some partiallyspeculative interpretations of some interestingresults in this area with the aim ofdemonstrating that variation and selectionnotions might play a role even here. Ifvariation and selection can survive in even asinhospitable and non-paradigmatic a terrain asfoundational physics, then it can surviveanywhere.     

论图书馆人力资源的开发与管理

本文阐述了人力资源在图书馆事业发展中的特殊作用，并针对图书馆人力资源管理的现状，论述了开发与管理的对策。     

The influence of chronic nicotine treatment on stress-induced gastric ulceration and emptying rate in rats.

Ten-day treatment with nicotine (5, 25 or 50 micrograms/ml drinking water) dose-dependently intensified gastric ulceration induced by cold-restraint, and emptying rate. Stomach contractions produced by graded doses of bethanechol i.v. were elevated further by nicotine treatment. It is suggested that chronic nicotine administration produces hypersensitivity of the gastric muscarinic receptors; stomach hypermotility contributes to the ulcer-worsening action of the alkaloid.     

电负性及其在无机化学上的应用

从用电负性来衡量元素在化合物分子中吸引电子的能力的必要性出发，阐述电负性的概念以及阿莱－罗周（Ａｌｌｒｅｄ－Ｒｏｃｈｏｗ）计算电负性标的方法，重点论述了电负性在无机化学上的某些应用．     

集成系统中工艺卡片填写与工序图绘制的研究

利用VBA实现CAD和CAPP系统集成，讨论了基于Word平台进行工艺卡填写，并在此基础上进行工艺卡填写和工序图并行输出的一般问题。工艺文件的填写是在CAPP数据库的支持下，直接读取CAD所提供的CAPP工艺数据文件，经推理机推理自动生产工艺过程；工序图绘制是在特征图表级和参数化绘图原理的基础上进行的。     

视图中插入文本块的编程方法

在一般应用软件中，文本输入是必不可少的。如何让文本输入像画线、画圆、画椭圆一样简单方便，实现在视图中插入文本块？可将输入的文本看成是一个文本块，或者说是一个矩形，在矩形中完成文本的输入、修改、换行等操作。这样，工作就转化为在视图中插入一个矩形，编程并让该矩形响应鼠标和键盘消息，从而实现文本块中文本的输入及各项操作。具体通过VC＋＋中文档、视图之间数据交换和各自职能的特点以及C＋＋中面向对象的技术^[1,2]，实现了在视图中插入文本块的方法。这里的文本块如其它的图形对象一样，可以选择、可以移动、可以修改、可以删除。最后给出了实现结果的图片。     

Population-based resequencing of ANGPTL4 uncovers variations that reduce triglycerides and increase HDL

Resequencing genes provides the opportunity to assess the full spectrum of variants that influence complex traits. Here we report the first application of resequencing to a large population (n = 3,551) to examine the role of the adipokine ANGPTL4 in lipid metabolism. Nonsynonymous variants in ANGPTL4 were more prevalent in individuals with triglyceride levels in the lowest quartile than in individuals with levels in the highest quartile (P = 0.016). One variant (E40K), present in approximately 3% of European Americans, was associated with significantly lower plasma levels of triglyceride and higher levels of high-density lipoprotein cholesterol in European Americans from the Atherosclerosis Risk in Communities Study and in Danes from the Copenhagen City Heart Study. The ratio of nonsynonymous to synonymous variants was higher in European Americans than in African Americans (4:1 versus 1.3:1), suggesting population-specific relaxation of purifying selection. Thus, resequencing of ANGPTL4 in a multiethnic population allowed analysis of the phenotypic effects of both rare and common variants while taking advantage of genetic variation arising from ethnic differences in population history.