论大学英语词汇教学

英语词汇学习是英语学习的基础，词汇教学是英语教学中的重要组成部分，从某种意义上讲，词汇教学是大学英语教学成败的关键。本文首先分析了目前大学英语词汇教学中不尽如人意的现象及存在的问题，从而进一步提出了如何对大学学生进行有效的词汇教学。     

应用简谐运动加速度的对称性解题

物体做简谐运动的过程中，在关于平衡位置对称的位置，各个物理量的大小相等．图1所示，弹簧振子在A，B点时的加速度等大反向，任意一对对称点都符合此规律。     

关于降低刑事责任年龄的探析

我国的未成年人犯罪呈低龄化的倾向主要原因在于他们不到刑事责任年龄,刑法对其没有威慑力.我国<刑法>等法律对未成年人相对负刑事责任年龄的规定应予以修改,即降低未成年人的相对刑事责任年龄标准,这样才能有效遏制未成年人犯罪.     

Viscosity Characteristic in Metallic Melts with Medium／Short-Range Order Structures

Viscosities and liquid structure of alloys Cu75Al25, Cu87Sn13 and Al-12.5%Si and pure metals Cu and Sn are investigated by using torsional oscillation viscometry and high temperature x-ray diffractometry. The viscosities of pure metals and eutectic alloy melts along with the short-range order structure are found to follow the Arrhenius law in a wide range of temperature above the liquidus. The breakpoints in Arrhenius plots emerge when the structures of alloy melts are transformed from the medium-range order structure to the short-range order structure. It has been found that the change of the viscosity of the metallic alloys is a characteristic of microstructure transformation in the related melts.     

电子线路的数值优化设计

研究了电子线路的数值化设计方法.它是一种自动化程度高、通用性强、精度高的电路设计方法。介绍了电子线路数值优化设计软件系统YJX—1.它具有广泛的通用性和快速收敛的特点。     

Web-Based Information Extraction Technology

Information extraction techniques on the Web are the current research hotspot. Now many information extraction techniques based on different principles have appeared and have different capabilities. We classify the existing information extraction techniques by the principle of information extraction and analyze the methods and principles of semantic information adding, schema defining,rule expression, semantic items locating and object locating in the approaches. Based on the above survey and analysis,several open problems are discussed.     

建筑防水工程的质量控制

建筑防水是一门综合性、实用性很强的工程技术,对建筑工程的使用功能起着至关重要的作用.笔者根据若干项目的工程监理实践,对建筑屋面、地下室、厕浴间以及储水池等提出建筑防水工程质量控制要点.