研究平抛物运动实验成功之关键

在研究平抛物运动的实验中，只要注意做好关键的六点，实验就会成功，描出的平抛物运动轨迹比较准确，求出的初速度误差较小。     

浅谈英文写作

文章论述了英文写作的主要注意事项，着重论述了英文写作的结构特点。强调英文写作应注意用词的准确性、用词范围、句子结构多样性等，并结合范文分析，提出了限制性写作的基本原则和结构特点等。     

Hierarchical self-localization of underwater wireless sensor network nodes

The follow-up application of underwater wireless sensor network is influenced by accuracy of self-localization of nodes. The self-localization of nodes is discussed in this paper. First of all, nodes of underwater wireless sensor network are classified into several levels according to the accuracy of position of nodes and the levels are from the first to the fifth in accordance with accuracy of nodes from high to low respectively. Secondly, the level of anchor nodes can be known by those unknown nodes from the information given by the anchor nodes themselves, At the same time the unknown nodes are able to be located in the area controlled by the first level of anchor nodes that are as the aggregation. Then the positioning algorithm is designed correspondingly in accordance with the accuracy level of nodes. Finally, the positioning algorithm is simulated and analyzed. The result shows that the unknown nodes can be located effectively by hierarchical control.     

一种改进的无线传感器网络DV-HOP定位算法

为了解决DV-HOP算法在节点随机部署环境下定位误差较大的缺点,提出一种基于DV-HOP多通信半径的加权双曲线定位算法RWHDV-HOP。该算法通过理想跳数与实际跳数的差值修正平均跳距,结合多通信半径使跳数小数化,利用基于跳数加权的双曲线算法估算未知节点坐标。仿真结果表明,在相同条件设置下,RWHDV-HOP算法定位精度比传统DV-HOP算法提高了25%,比RWDV-HOP算法提高了10%。因此,基于DV-HOP多通信半径的加权双曲线定位算法RWHDV-HOP在节点随机部署环境下能够较大程度上提高节点定位精度。     

椭圆齿轮流量计误差校正

该文分析了流体的粘度对椭圆流量计测量精度的影响,并简述其误差校正方法,该方法对流量测量仪表精度校正具有普遍意义。     

评价信息咨询的模糊综合评判法

从信息咨询的三要素：即信息源(各种文本知识)、媒介(咨询方式与咨询员)和信宿(读者)出发，归纳出15种评价信息咨询质量的指标，建立起评价指标体系，并提出一种模糊综合评判法，以客观地对图书馆信息咨询工作进行评价。     

中外优秀跳远运动员起跳技术的运动学比较研究

以1997年第8届全运会和同年在雅典举行的第6届世锦赛中外优秀跳远选手技术参数为依据，从助跑速度、起跳能力、助跑的准确性和落地动作等主要技术环节，对我国和世界跳远选手进行比较分析，找出劣势和优势。     

大学微量滴定分析实验方法及仪器研究

为解决分析化学实验中的微量化问题,研制了一种适于开展微量滴定分析实验用的新型微量滴定管和实验方法,并与50.00mL标准滴定管进行了酸碱滴定法、氧化还原滴定法、配合滴定法和沉淀滴定法的平行测定比较,其测定精密度和准确度无显著性差异,且数据一致性和重复性好,操作更加便捷,非常适用于分析化学实验。     

Immigrant perpetrators in the news: A terror management approach to resultant hostility,perceived vulnerability,and immigration issue judgment

This study found that mortality salience in TV news activated more hostile attitude toward the perpetrators and negative judgment on the immigration issue. Social group difference influenced news viewers’ immigration issue judgment, but did not affect their resultant hostility and perceived vulnerability. More negative attitudes emerged toward the immigration issue when immigrant perpetrators were portrayed negatively in the news. News viewers with exposure to mortality salience in TV news reported more negative toward immigrants. Exposure to mortality-related elements in TV news could lead to social conflicts that were viewed as a severe threat by U.S. government and policymakers.     

试论短信证据的审查判断

短信作为新兴证据出现在诉讼领域,司法实务界对其审查判断存在的主要问题有:忽视短信证据能力、歧视短信证据效力、界定短信证据种类多样化。为了使短信真正被司法人员所认可,赋予短信应有的证据法律地位,必须树立正确的证据观念:理性判断短信的证据能力、正确厘清短信特性与属性的关系、明确界定短信的证据种类。并就短信的审查判断中应注意的若干问题进行了有益探讨。