滨海城市建筑工程台风灾害的新特点

分析9014^#对厦门市各类建筑工程及其附属设施的影响,总结此次台风区别于上世纪50至80年代同类台风的新特点,即建筑工程主体结构基本无损坏,外围护结构轻度破坏,附属构筑物和大跨度轻型屋盖严重破坏．在此基础上,提出了滨海城市防御台风灾害的若干管理措施和技术对策建议．     

我国环境影响评价中存在问题及其对策

介绍了国外环境影响评价的特点,分析了我国现行环境影响评价中存在的一些问题,并提出了解决对策.     

含砾岩样中切削齿冲击载荷变化规律试验

通过直径为19 mm的单齿切削含砾岩样试验,研究砾石直径、胶结强度、切削深度、切削齿后倾角等对切削齿所受冲击载荷的影响规律,分析PDC钻头钻进砾石层的损坏机制。结果表明:切削齿受到的冲击力随着砾石层胶结强度、砾石直径的增加而增大,随切削齿切削深度的增加呈指数增加;相同切削面积下,切削齿受到的冲击力随着后倾角的增大而增大;当冲击载荷大于切削齿的极限冲击强度时,切削齿将直接产生碎裂;即使冲击载荷不能达到切削齿的极限冲击强度,周而复始的冲击载荷达到切削齿的冲击韧性时,切削齿将发生冲击疲劳损坏。     

金属表面涂装类项目的环境影响评价

介绍了涂装类建设项目环境影响评价的重点,分析了产污环节和筛选评价因子,评价了污染防治措施的可行性,指出应着重注意含重金属原料的使用、涂料的性质种类和喷漆室等效排气筒的计算等问题.     

著作权法下的图书馆工作

分析了著作权法对图书馆业务工作的影响，就图书馆如何在著作权法的框架下开展工作和提供更好的服务，提出了相关建议。     

略论互联网对高校党建工作的影响及对策

互联网的发展对高校党建工作提出了新的挑战和契机。创新党建工作，利用好网络开展高校党建工作，以提高党建工作的实效性，成为当前高校党建工作的一个重要途径。本文从互联网引起高校党建工作模式的改变、互联网对高校党建工作的影响表现及互联网环境下高校党建工作的有效开展等方面，提出了相应的对策及建议。     

基于ADAMS的采掘机械工作机构设计及性能

为了有效提高采掘机械的生产效率,节约能源,设计采用了一种新型工作机构,阐述了该工作机构的工作原理、机构特点以及在设计中要解决的问题及其解决的方法,并利用ADAMS仿真软件进行运动学仿真计算。结果表明六列抡锤设计是合理的,通过仿真计算,确定主轴的最佳转速及抡锤恢复到最佳打击状态的时间,该成果对创新采掘机械工作机构具有一定的参考价值及指导意义。     

采煤对上党盆地城镇群区域环境的影响及防治对策

通过对长治市1＋6上党城镇群区域环境现状进行的全面调查分析,得出采煤对生态环境造成的影响,并从政策和技术两个层面提出了相应的防治对策。     

Surface pollen assemblages of human-disturbed vegetation and their relationship with vegetation and climate in Northeast China

Pollen assemblages of 53 surface pollen samples from farmlands and wastelands in Northeast China were analyzed. Tree pollen percentages were usually higher than 30%, with Pinus (26.9%), Quercus (0.9%), Betula (0.9%) and Populus (0.7%) as the major types, and herb pollen percentages were usually higher than 50%, with weedy Poaceae (8.7%), Chenopodiaceae (7.1%), Artemisia (1.9%) and Compositae (3.5%) as the major taxa. Thus, the pollen assemblages were consistent with the regional vegetation compositions. However, there were differences in pollen assemblages among regions, especially among different geomorphological units. For example, in the mountains, there were more types of tree pollen and higher total percentages (average 42%) than in other areas, while cereal pollen percentages were lowest (11.2%). In the hills and high plains, herbs made up more than 60% of the pollens, with cereals (average 53.6%) the dominant type. In the low plains, pollen types were similar to those in the hills and high plains, but total pollen concentrations and the proportion of Concentricystes were much higher, while cereal pollen percentages were slightly lower (average 41.6%). Pollen assemblages in different land use types also differed. For example, in farmland, cereal pollen percentages were more than 40% and Chenopodiaceae was usually less than 2.5%, while in wasteland, weedy Poaceae was usually less than 10% and Chenopodiaceae was usually higher than 25%. Total pollen concentrations in farmland (average 3909 grains/g) were much lower than in wasteland (average 15074 grains/g). Redundancy analysis revealed that pollen assemblages were significantly negatively correlated with mean annual temperature (-0.73) and July mean temperature (-0.81) and significantly positively correlated with mean annual precipitation (0.48), indicating that pollen assemblages in the artificial or human-disturbed vegetation reflect regional climate well. Comparison of pollen assemblages in different areas of northern China showed that pollen concentrations reflect the intensities of human impact to some degree. For example, pollen concentrations decrease as human impacts increase in intensity. The cereal pollen proportions in farmland differed by area. In Northeast China, cereal pollen proportions were distinctly higher than in most other areas of northern China, suggesting differences in planting habits and climate.     

网络环境下的语言文字应用研究综述

网络环境下,语言文字有其独特的应用特征,网络语言的广泛流传对汉语言文字和人们的语言生活产生了正反两方面的影响。语言使用者和语言管理者都要积极行动起来,采取相应的规范措施使用和管理网络语言,从而扬其长避其短,为网络语言提供更好的发展前景。