Rapid cold hardening process of insects and its ecologically adaptive significance

In contrast to overwintering cold hardening, a rapid cold hardening process has recently been described in insects. This process can rapidly enhance cold tolerance of insects in several hours or even minutes. The characteristics of rapid cold hardening include inducing conditions, cold hardening effects, and fitness costs. Physiological and biochemical mechanisms of rapid cold hardening include rapid changes in the phospholipid composition and the increase in hemolymph osmolalities, polyols production, proline and cold-induced proteins. Moreover, there are different views about the ecologically adaptive significance of rapid cold hardening in insects. This paper reviews research results about rapid cold hardening of insects since 1987, focusing on forms of cold injury, strategies of cold tolerance, and definitions, characteristics, physiological and biochemical mechanisms and adaptive significance of rapid cold hardening.     

煤炭城市自然灾害的防治及可持续发展的探讨

从煤炭城市可持续发展的角度出发，对采煤引起的自然灾害进行了系统的论述，并为煤炭城市可持续发展战略的顺利实施提出了切实可行的防治对策。     

皖南传统聚落的生态适应性

以景观生态的视角，对皖南传统聚落的选址、布局以及巷道空间、单体建筑形态等进行了分析与研究，以对当代建筑设计有所启迪．     

民族生态审美场论

与相应的审美氛围、审美风范双向对生并走向整生的民族审美活动循环圈 ,构成民族生态审美场。民族生态审美场是民族生态审美学的整体对象 ,它的逻辑结构统观化整生化展开 ,构成当代民族生态审美学的理论体系     

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.     

废弃钻井液减量化方法探讨

论述了废弃钻井液减量化的主要方法。通过这这些方法的具体运用,可有效减少废弃钻井液的产生量和排放量,减少对周围环境和地下水的污染,保护生态环境,使钻井作业达到法律法规和标准的要求,树立钻井企业形象,提高国内外钻井市场占有率和经济效益。     

西北工业发展滞后的数量分析及调整对策

运用统计资料，从工业化基础、工业投入、工业内部结构、工业中非国有经济所占比重、工业的外向性等多个方面，分析了西北地区工业自改革开放以来整体下降的原因，说明工业增长滞后、工业效益滑坡是影响西北经济发展水平的重要因素。提出了在新的外部条件下，调整和优化西北地区工业结构的设想。     

新产业工人--中国农民工的历史归宿

农民工是社会转型期向我国工人阶级过渡的新群体。无论从理论上还是现实生活中，农民工已经逐步成为我国的新产业工人。走出对农民工的认识误区，从宏观政策上提高农民工的地位和待遇，推动其向工人阶级的转化，有利于加速我国的产业化进程和农业结构调整，促进我国现代化的进程。     

邛崃波尔山羊场牧业生态系统能流物流的研究

运用生态学的系统分析方法，以邓崃波尔山羊场牧业生态系统为研究对象，对其能流、物流以及能量和物质的转化效率和经济效益进行了研究．结果表明，该牧业生态系统以畜产品及畜体输出的能量和粗蛋白质分别占相应总输出的31．07％和31．77％，家畜能量和粗蛋白质的转化效率分别为16．560／o和17．81％，产值盈利率为36．42％，其中羊高达52．26％．该系统是一个值得推广的牧业生态系统．     

试论达尔文进化论在生态学发展中的地位

介绍了现代生态学发展的特点和达尔文的进化论及完善过程，认为达尔文提出的生态思想是朴素的生态观，其进化论是种—种群的进化，从本质上并未涉及到其他生态学等级的进化；必须以普遍联系的系统观和时空观评价生态学发展现状，生态学研究也必须注重局部各因子之间、整体与局部之间的作用关系。初步探讨了能否象牛顿力学那样将自然选择力作为推动生物进化的“万有引力”的生态学研究问题。