森林生态系统管理的主体与基本步骤

生态系统管理要求以生态学的理论系统科学地管理森林生态系统，维持森林生态系统的整体性、多样性、可持续性和健康．森林生态系统管理的主体具有多元化的特征，包括政府、森林经营者、公众、科学家等，在政府的主导下，多元化主体在管理过程中，广泛参与，彼此协调，相互合作。实施森林生态系统管理的基本步骤包括范围界定、问题辨识、确定目标、制定政策方案、组织实施、监测评价和适应性调整等7个步骤．     

Explaining the causes of poverty in the West Indies: A cross-cultural comparison

Research into attitudes towards the poor and lay explanations for poverty have heen primarily concerned with the structure and determinants of these attitudes and explanations. Whereas a number of variables — education, religion, ethnic group — have been shown to relate to explanations for poverty, there have only been a few cross-cultural studies. This study set out to compare the explanations adolescents gave for poverty in two West Indian islands — the relatively wealthy island of Barbados and the relatively poor island of Dominica. The overall economic development/prosperity of the two islands, and the extent and visibility of economic inequality between the two islands appeared to account for the numerous national differences. These results are discussed in terms of the social, political and historical differences between the two islands.     

“村村通”广电建设中存在的问题与对策研究

国家对基层广电事业提出了确保"村村通"长期通的新目标,但由于西部基层广电事业自身固有的问题以及在"村村通"建设中产生的新矛盾,完成艰巨任务存在很大困难.而且西部基层广电事业原有的资源条件和经营环境受挤严重,旧的发展方式力不从心,困局渐显.政府主导、行业直管、整合资源、纵深开发是西部基层广电事业改革发展,建立"村村通"长效机制的关键性策略.     

“10”在数制转换中的妙用

数制是计算机应用学习的一个关键和难点,本文巧妙地运用“10”来解决这一问题。     

Adaptive wavelet estimation of a density from mixtures under multiplicative censoring

In this paper, a mixture model under multiplicative censoring is considered. We investigate the estimation of a component of the mixture (a density) from the observations. A new adaptive estimator based on wavelets and a hard thresholding rule is constructed for this problem. Under mild assumptions on the model, we study its asymptotic properties by determining an upper bound of the mean integrated squared error over a wide range of Besov balls. We prove that the obtained upper bound is sharp.