An improved 3-D ray tracing method using linear traveltime interpolation

An approach of three-dimensional seismic ray tracing is presented, which is derived from adopting two-dimensional linear traveltime interpolation (LTI). By adjusting the forward process using the partition of grid interface, and backward step by considering more directions, the new approach is suitable for the application of three-dimensional models. The calculation results show that, with the same accuracy, the improved 3-D method is much faster than the method of traditional LTI directly applied in the three-dimensional case.     

论水泥搅拌桩在高速公路软基处理中的施工工艺

介绍了采用水泥搅拌桩处理祁临高速公路临汾北环段第四合同段软质地基的施工方法、施工要求及质量控制。     

Evaluation of indoor air quality based on qualitative, quantitative and olfactory analysis

In studying indoor atmospheric pollution, the concentration of air pollutants is considered to be the primary factor in judging indoor pollution level, while sensory effects accessed by olfactory analysis has not been paid enough attention. In this paper, twenty living rooms in Beijing including newly decorated, 3 months and 6 months after decoration were sampled once a day for 10 d, and qualitative analysis, quantitative analysis and olfactory analysis of volatile organic compounds were carried out. The results showed the concentrations of the 6 main compounds surpassed the limitation values released by World Health Organization; the pollutants with highest chemical concentrations were not the most odor active odorants. Olfactory analysis which measured the odor characters such as odor detection threshold (ODT), odor active value (OAV) and odor quality was a helpful tool to identify possible chemicals which cause indoor smelling issues, and it was necessary to access indoor air quality in combination with their chemical concentrations to give a comprehensive judgment on indoor air quality.     

关于“啃老族”的若干思考

近年来,我国的"啃老族"队伍越来越壮大,不仅不利于年轻人的成长,还带来巨大的社会隐患,已成为一个不容忽视的社会问题。"啃老族"的出现,有极其复杂的原因,一方面是"啃老族"自身的原因,另外也有家庭、教育、社会等方面的原因。笔者认为要解决"啃老"这一社会问题,需要家庭、学校、政府、社会等方面的密切配合、共同努力,才能根本解决。     

随书光盘机读目录的编目探讨

为加强随书光盘的开发与利用, 本文就随书光盘的特点、机读目录格式及编目中的一些问题进行了探讨.     

论行政赔偿范围的扩大

对我国目前的行政赔偿范围进行了反思。认为我国现行的《国家赔偿法》主要以列举方式确定的行政赔偿范围,极大限制了行政赔偿范围。建议采取“概括加否定排除式”的立法模式扩大行政赔偿范围,将行政规章以下的抽象行政行为、行政不作为行为和精神损害赔偿纳入行政赔偿范围。     

论党的执政方式向依法治国的转变

实现学的执政方式向依法治国的转变，既要坚持和加强党的领导，更需要全党转变观念，变革领导方式，提高执政水平。     

任务驱动法在C语言教学中的应用

针对C语言教学中学生思维难以转换，易产生畏难情绪，动手能力差的问题，将任务驱动法应用到Ｃ语言的教学中，激发学生学习的兴趣，培养学生的探索精神和创造性思维，提高学生的实践操作能力，以适应社会对高素质技能型人才的要求。文中详细分析了基于任务驱动法的Ｃ语言教学设计和任务驱动法在实施中的注意事项。     

Editor’s note

The coastal zone spans both land and water, extending landward up to the highest water line that occurs on shore during storms and seaward to the point at which storm waves no longer move sediments on the seafloor. The specific contact line between land and sea is the shoreline and adjacent land is considered     

墨子主动施教教育思想探析

在日趋激烈的社会竞争中,教育发挥着越来越重要的作用,尤其是教师的作用被提到了新的高度。要充分理解教师的作用,我们需要学习墨子教师主动施教的教育思想。春秋战国时期,墨子根据"染于苍则苍,染于黄则黄"的"素丝说"提出"不扣必鸣"的主动施教思想并亲自实践。墨子的主动施教思想具有普及性、强制性和公益性特征,要求教师坚持主动施教的教育原则,积极主动地对学生施加影响,坚持甘于吃苦的奉献精神,采取各种具体的施教方法引导学生主动学习,形成交互式师生关系。