随机路点运动模型合群特性研究

以随机点过程和Palm积分为数学模型基础,对移动通信系统仿真模型中常用的随机路点(RWP)运动模型的合群特性进行了分析.指出大量服从RWP模型的节点共同运动时,会表现出一种天然的倾向于区域中心的合群特性,而非均匀分布.通过定义合群密度,给出了RWP模型在一般凸区域内的合群密度的计算方法及一维线段和正方形区域上的合群密度显式.通过两个实例仿真验证了分析结论.     

关于拟微分算子的Lars Hrmander问题(英文)

讨论拟微分算子的有界性，ＬａｒｓＨｏｒｍａｎｄｅｒ提出的关于拟微分算子的有界性问题被回答．     

物理实验教育的现状及改革目标与高师生的素质培养

在分析1980-1995年间高考物理实验测试及当前中学物理实验教育改革的基础上，提出了高师物理实验教育改革的目标，探讨了高师学生素质培养问题。     

棉花粘性仪的研制

在分析棉花粘性特点、粘性测试方法的基础上,研制了棉花粘性仪,并应用该仪器对实际棉花样品进行了测定,试验结果和工厂的实际情况基本相符。证明本仪器用于测试棉花粘性是可行的。     

组成材料引起钢筋混凝土质量缺陷分析与防治

介绍了由组成材料的质量问题引起的钢筋混凝土结构工程的质量缺陷，系统地分析了产生质量缺陷的原因。指出了施工阶段现场质量监理工程师预防质量缺陷现象发生应采取的预防措施。     

石河子垦区复种油用向日葵的生态适应性分析

北疆沿天山一带用早熟冬小麦复种早熟油葵一年两熟，是近年才出现的耕作制度改革。其中深入分析复种油葵的生态适应性，尤其是灌浆阶段的耐寒能力的生态适应性，是推进改制的重要问题。北疆沿天山一带８月下旬至１０月上旬的气候条件，能基本适合早熟油葵灌浆的要求，但也需要油葵能适应秋季降温快、早霜期不稳定的缺陷。经研究，油葵在日最低气温０℃以上的冷凉气候下仍能继续灌浆，能忍受－２℃左右的早霜冻，霜后转暖仍可继续灌浆成熟，表现出对本地区良好的气候生态适应性，成为油葵复种技术的生态基础。     

Numerical Analysis for Temperature Characteristics of Open Boundary Crushed-rock Embankment on Qinghai-Tibet Railway

At present, in order to protect the stability of permafrost beneath embankment, the crushed-rock embankment, as a new type of embankment structure, has widely been used in the construction of Qinghai- Tibet Railway. Its crushed-rock layer is almost open in tow bilateral boundaries and closed at top and bottom, and air can flow into/out of the ballast layer and crushed-rock layer. Therefore, the convection and transfer heat patterns are very complicated in the ballast layer and crushed-rock layer of the embankment, which are regarded as porous media. In this paper, based on the wind, temperature and geology conditions of Qinghai- Tibet Plateau, a numerical approach of the unsteady two-dimensional continuity, momentum （non-Darcy flow） and energy equations of heat convection for incompressible fluid in porous media is provide to analyse the velocity and temperature characteristics of the crushed-rock embankment with different embankment heights under open boundary condition for the coming 50 years. The calculated results indicate that, due to the influence of the external wind, the convective heat transfer mainly relies on the forced convection in the open crushed-rock emban kment. Even if the air temperature will be wanned up by 2.6℃ in the coming 50 years, it still has a better cooling effect on the underlying soils and a low temperature frozen-soil core is formed in the permafrost below it if the embankment is constructed in the regions whose present mean annual air temperature is - 4.0℃. Furthermore, the cooling effect of high crushed-rock embankment is better than that of low embankment. This results from the fact that the wider bottom of high emban kment has a more influence dimension on the underlying frozen soil. However, cardinal winds on Qinghai-Tibet Plateau disturb its convection pattern, so that an asymmetric temperature distribution occurs under high embankment and it is possible to induce a transverse uneven deformation of emban kment, but no similar situation occurs under low embankment. This asymmetric temperature field problem should be considered when crushed-rock emban kment is designed and constructed.     

从莰烯合成E型8—莰烯基甲酸酯类化合物

以莰烯为原料，先经Ｖｉｌｓｍｅｉｅｒ－Ｈａａｃｋ甲酰人反应制得Ｅ型莰烯醋，将后者控制氧化得Ｅ型８－莰烯基甲酸。在硫酸催化下使２分别与甲醇，乙醇，正丙醇，异丙醇进行酯化反应合成了２的四种酯，并进行了纯化和结构分析，氧化及酯化的得率都较高，而且甲酯与乙的香气良好。     

大学生暴力心理倾向的非理性诊疗

当代大学生因为生理与心理发展的不平衡、校园周边环境混浊、暴力文化泛滥、家庭教育与学校教育的某些缺陷等原因而产生了暴力心理倾向,我们可以通过认知疗法与榜样干预、心理训练与修养、心理预防教育与法制教育、学校教育与家庭教育互动、学校创造健康向上的整体内部环境、政府以行政干预净化校园周边微观社会环境等方法来预防和诊治学生暴力心理倾向。     

咸宁学院学生群体运动现状分析与对策研究

采用文献法、问卷调查法、访谈法对我院学生群体运动的现状进行调查与分析,指出了我院学生群体运动中存在的问题,并提出改进我院学生群体运动工作的建议,以便为我院学生群体运动工作提供参考.