A Study on Forest Species Diversity and Its Ecological Service Function in the Plateau Area of Western Sichuan

This paper presents a study on species diversity and its ecological service function in the plateau area in western Sichuan. The results show that species diversity in the plantations on the cutover land has a tendency to increase and that its ecological service function is to be improved with stand age growing. The species diversity in forest communities is also gradually increased on different succession stage till reaching a climax level. But the species diversity in the climax community is slightly decreased before it reaches a relatively constant status. Ecological service function of diversity is gradually strengthened with the progress of succession. In addition, species diversity in a stand in a similar site and at a same age differs among forest types. Species diversity index within a coniferous and broad-leaved mixed forest is larger than that within a coniferous forest. Meanwhile, species diversity enriches as the tree density increases.     

Disaster Reduction Decision Support System Against Debris Flows and Landslides Along Highway in Mountainous Area

Highways in mountainous areas are easy to be damaged by such natural disasters as debris flows and landslides and disaster reduction decision support system (DRDSS) is one of the important means to mitigate these disasters. Guided by the theories and technologies of debris flow and landslide reduction and supported by geographical information system (GIS), remote sensing and database techniques, a DRDSS against debris flow and landslide along highways in mountainous areas has been established on the basis of such principles as pertinence, systematicness, effectiveness, easy to use, open and expandability. The system consists of database, disaster analysis models and decisions on reduction of debris flows and landslides, mainly functioning to zone disaster dangerous degree, analyze debris flow activity,simulate debris flow deposition and diffusion, analyze landslide stability, select optimal highway renovation scheme and plan disaster prevention and control ergineering. This system has been applied successfully to the debris flow and landslide treatment works along Palongzangbu Section of Sichuan-Tibet Highway.     

C语言多维数组与指针的探讨

在C语言的学习中，数组与指针的应用是重点和难点，尤其多维数组和指针应用已成为学习和掌握C语言的一大障碍。利用消维法和图示法，通过二维、三维数组与指针的关系，延伸到多维数组的探讨，让学习C语言的人轻松的理解和接受利用指针法对多维数组元素取值的方式。     

永磁非金属液体电磁泵磁场数值分析

将电磁泵体求解场域按二维平面场处理,考虑了外磁场对永磁体的磁化效应,用有限元法对永磁非金属液体电磁泵的磁场进行了数值分析,得到了该电磁泵气隙中的磁密曲线以及载流海水在气隙中流动所受到的电磁力.实验证明该数值分析的结果是准确的,这些数据为永磁非金属液体电磁泵的设计和应用提供了可靠依据,同时也说明了可用永磁体代替价格昂贵的超导磁体应用于非金属液体电磁泵的磁极设计.图7,参7.     

我国农业剩余劳动力转移的时间分析和对策研究

农业劳动力份额由75％下降到10％，被视为一国基本上完成农业劳动力转移的标志，要做到这一步，根据预测我国大约需要55年的时间。作者在分析农业剩余劳动力转移障碍的基础上，提出了引导农业剩余劳动力合理流动的对策。     

China'''' s Fundamental Research in Energy Utilizations and Environment

The progress in the science of energy utilizations will act crucial effect on the developments of energy science and technology, which will then promote social and economical developments and fulfill requirements for the national strategic objectives. For the sake of sustainable development, a harmonious blend of energy utilizations and environment considerations will become one of the vital topics in the future research area of energy science. It is suggested that clean and high-efficiency utilization of traditional or fossil energy resources, fundamental investigations on the energy and environment theory, renewable energy utilizations, and the development of nuclear energy are selected as priority research areas during the period of the Tenth Five-year Plan of China, according to the development trend of the world energy science and the research background of Chinese energy science. It is expected to promote the interdisciplinary investigations in the science of energy u-tilizations and provide scien     

泛型程序设计的常用技术

泛型程序设计是继面向对象程序设计之后对程序设计领域的又一次大的冲击，它对问题高效，而优雅的处理方法是很值得计算机专业人员参考与借鉴的，总结了一些最常用的泛型程序设计技术，实践证明，掌握这些常用技术，不仅可以在实践中收到立竿见影的效果，而且可以更好的理解泛型程序设计的精髓。     

奇异线性模型相对效率的下界估计

定义了奇异线性模型的两种相对效率e2(β)和e5(β)，利用矩阵代数工具给出了e2(β)和e5(β)的3个下界估计，并且得到了一些矩阵不等式．     

基于三级模式的信息系统设计的优化

指出了传统的C／S模式的缺陷，说明了基于三级(N级)模式设计的概念及采用该技术开发应用程序的优越性。在这个基础上着重讨论了运用三级(N级)模式开发应用程序时应该注意的问题，提出了一些设计使用中的建议。如任务分割、避免死锁、采用OO技术等，并给出了应用实例．     

基于活动对象的面向对象测试策略研究

提出基于活动对象的面向对象测试策略，给出三种覆盖标准，用以处理由面向对象新特性带来的问题。其中，所有定义-使用对覆盖标准主要用于指导测试设计者设计验证对象生存期的动态行为的测试用例；所有绑定覆盖标准主要用于解决继承和多态问题，以及执行了哪个绑定；所有交互覆盖标准主要用于解决方法间的数据共享问题。