一维振动的直接求解

本文运用微积分知识采用观察法 ,直接给出质点一维振动微分方程的解 ,从而避免了在大学一级理工科学生中过早地使用微分方程知识     

公共图书馆的有偿服务与无偿服务

目前,公共图书馆开展有偿信息服务已是不争的事实,重要的是如何处理好有偿服务与无偿服务的关系。本文把有偿服务限定在信息服务范围内,认为除此之外的图书馆业务工作应是无偿的,并且从开展有偿信息服务是公共图书馆顺应市场经济发展的必然趋势、有偿服务与无偿服务的关系、有偿服务的收费标准等方面试图把有偿信息服务与图书馆传统的基础业务区分开来,论证公共图书馆开展有偿信息服务是对图书馆工作的深化和拓展,目的是为了促进公共图书馆事业的发展,从而促进经济与社会的发展．     

Free radical generation and lipid peroxidation among the dry cell industry workers exposed to carbon

A total of 75 healthy male dry cell industry workers exposed to carbon for 5, 8 and 10 years were compared with 48 controls matched for age and economic status with respect to free radical generation, lipid peroxidation and antioxidant levels. Lymphocytes were seperated from the whole blood and used for estimation of free radicals and antioxidants. Plasma lipid peroxidation products were estimated in the form of thiobarbituric acid reactive substances. Significant increase in free radical generation and lipid peroxidation products were observed in carbon exposed population than controls, and the increase was found to be significant with increase in the period of exposure. The levels of antioxidants i.e., superoxide dismutase (SOD) and catalase were found to decrease with the increase in exposure to carbon in industrial workers. These results suggest that exposure to carbon augments free radical generation, lipid peroxidation and promotes decline in antioxidant enzymes.     

线性离散振动系统的电模拟

从线性离散系统机械振动的理论模型出发,根据力学系统与电学系统物理量间的对应关系[1],建立了模拟电路方程,并给出对应的模拟电路。     

氰化物预处理方法的研究

该文采用吡啶—巴比妥酸分光光度法对水样中的总氰化物进行测定,探讨了氰化物测定的各预处理体系,选用了9种预处理体系分别对八种金属氰络合物进行了实验研究,并使金属氰络合物与游离氰含量比为1:1的条件下考察其游离情况.实验表明,除3种预处理体系外,其它预处理体系均获得了满意的结果.     

网上免费资源的收集与整理

互联网上有许多免费资源，这些资源完全可以用来补充我们的图书馆馆藏，同时对科研工作者个人来说也有着重要的作用。本文尝试着从利用各种搜索引擎、学科门户网站、邮件列表等7个方面讨论如何更有效地更准确地获取这些免费资源，同时对这些免费资源的组织方式也进行了探讨，力图寻找一种更有效的组织方式能更好地利用网上的这些免费资源。     

从英语课堂“free talk”环节中学习新知

中学教师通常利用一节课的前几分钟与学生进行自由交谈,来达到吸引学生的注意力和检查学生巩固知识情况的目的。然而,如果教师不针对学生的谈话,就个别问题追问学生,那每天的自由交谈就成了例行公事,索然无味了。本文就这一问题来探讨中学教师如何能有效地利用课堂自由交谈这一环节提高学生英语水平的问题。     

散打运动引入传统武术功力训练的可行性研究

运用文献资料、专家访谈和逻辑推理等研究方法,以丰富我国现代散打技术训练方法理论体系为研究视点,针对我国散打运动员在多次中外散打对抗赛中所表现出的攻击力薄弱、抗击打能力较差等问题,结合传统武术功力训练的特点和现代散打运动技术训练的实际,提出了将传统武术功力训练的方法有针对性地移植到对散打运动员的拳法、腿法、摔法及步法的训练之中,来最大限度提高散打运动员的攻击力和抗击打能力,有效提高其散打竞技水平。     

Relationship quality,community promotion and brand loyalty in virtual communities: Evidence from free software communities

The Internet has favored the growth of collaborative platforms where marketers and consumers interact to develop more engaging products and services. These platforms are usually centered in a specific brand/product and their members are linked by a shared admiration to that brand. This paper analyzes one of the most powerful online collaborative platforms, the free software (FS) case, which involves a lot of virtual communities developed around products such as Linux or Android, the new Google's mobile operating system. Our purpose is to determine some of the main antecedents and consequences of the consumer involvement in this type of communities. Results have shown that satisfaction with a virtual community may increase the level of consumer participation in that community. At the same time, a greater identification with the virtual community may increase indirectly the consumer participation thanks to the enhancement of his/her satisfaction with the community. We have also found positive and significant effects of consumer identification and participation on the level of community promotion. Finally, positive and significant effects of consumer participation and satisfaction with the community on loyalty to the FS were also found. These findings allow us to conclude some interesting managerial implications.     

中国高技术产业空间转移模式及动力机制研究

摘要：本文在探讨产业转移若干经典理论的基础上,研究了高技术产业转移的特殊性,包括快速转移、涌浪转移、逆梯度转移、聚集现象和区域专业化分工现象等五方面,并从模态形式的角度对中国高技术产业转移进行分类,将转移分为风浪型转移和涌浪型转移两大类,最后从技术转移过程和转移动力因素两个方面对高技术产业转移进行了动力学分析。