计算机实验室综合管理系统的研制

本文介绍了一种计算机实验室综合管理系统的设计与实现,重点介绍了设备管理、学生实验课管理、学生零散上机管理及实验员的管理。     

关于地方政府机构改革的两点思考

入世后,地方政府要精简机构,转变职能,提高工作效率和优质服务水平,建立高素质的公务员队伍。这样,才能 与市场经济相适应,与入世接轨相配套。     

宋元书院与地方文化——吉州地区书院、学术与民间宗教

在许多地方,书院曾是儒学教育的主要承担者。十至十四世纪吉州地方文化与道学教育相互作用。吉州的历史开始于七至八世纪。那时,吉州大姓开始搬迁到这一区域。搬迁在很大程度上并不是受佛教或道教的影响。当时民间宗教是相当现实的。效忠是宗教发展过程中的主要意识。功利精神或某种现实态度渗透到了当地的世界观和生活哲学。当地人对法律程序的熟悉程度和通过法律手段解决争端之快是出了名的。这也许能部分解释那一时期的相对和平。朱熹去世时,儒学已开始渗透到宗教。那时已有十三家书院,书院的高效率使用在传播儒家思想方面起到了作用。     

中国10个地方鸡种卵壳超微结构研究及聚类分析

对中国 10个地方鸡种卵壳外表面、内表面、横断面和壳膜外表面、内表面的超微结构在扫描电子显微镜下进行了比较研究 ,从而看出鸡种间卵壳结构具有明显差异 ,中国地方鸡种具有遗传多样性。根据遗传距离较近的品种间卵壳的超微结构相似的理论 ,对 10个鸡种的形态结构进行了赋值 ,通过数值分类法进行了遗传相似度的计算和聚类分析 ,从而得出遗传距离最近的是白耳鸡和狼山鸡。     

黄土高原水土保持世行贷款项目区局地气候变化初步分析

对黄土高原水土保持世界银行贷款项目实施前后的监测数据和有关气象资料进行分析表明 ,大规模林草、梯田等坡面措施和沟道坝库工程的实施 ,影响了当地小气候特性 ,较好地起到了调节温度、提高湿度、增加降水和雾日、减少冰雹等作用 ,项目区与参照站比较 ,相对湿度提高了 5～ 10个百分点 ,平均每年有雾日相对增加了 6 7d ,年降水量相对增加 5 %～ 10 %。     

aw逼近集与度量投影的连续性

该文在wCLUR(CLUR)的空间中,讨论了aw逼近紧与弱逼近紧(aw逼近紧与逼近紧)关系,并且由此得出Y是aw逼近紧,PY是范-弱(范-范)上半连续。     

盐碱地区园林树种的选择和应用研究--以山东德州市为例

阐述目前德州地区园林树种选择存在的问题,以及德州市自然环境和植被状况,总结德州地区耐盐碱园林树种的选择和应用情况,并为今后耐盐碱园林树种的应用提出可行性建议。     

Electronegativity Scale of Elements Calculated by Density Functional Theory and Related Methods

In chemistry and many related fields, electronegativity (EN) is an important fundamental concept and its scale is a useful physcochemical parameter. Here, calculations of both ionization potentials and electron affinities are extended toward 107 elements and done by density functional theory at the local density approximation(LDA) level and the LDB level, i.e., the local density approximation level with further non-local corrections for exchange and correlation included self-consistently as well as the modified Slater transition-state method. The definite-differentiation method is employed into calculations of the electronegativity scale and the related parameters of 107 elements with very good results due to the consideration of relativistic effects. The calculation presented is to examine both the LDA and LDB approximations in calculations for the ionization potential and electron affinity of the elements with an improved or modified Slater transition-state method, and relativistic effects have also been taken into account for 107 elements compared with 103, 86 or less in the previous report under a spin polarized density function theory with some approximations to the exchange-correlation function. The calculation results for the various quantities represent an obviously improvement over some previous calculations. It is shown that the results calculated by the extended technique and the improved Slater transition-state method in general agree well with experimental values presented by Pearson, and are better than the reported values in many previous literatures. The developed new electronegativity scale will widely be applicable in many fields such as molecular structural parameterization expression, chemobiological activity optimization prediction, structure-activity quantitation modeling, functional chemical adaptization designing, and so on.     

Morphological variation in Astragalus hamosus L. and Coronilla scorpioides L. populations of Tunisia

Morphological variation between Astragalus hamosus and Coronillascorpioides populations was studied using local germoplasm collected in northern and central Tunisia. Twenty-one morphological traits were recorded and data were analysed using complementary statistical analysis. Considerable variation based on morphological and agronomical traits was found between populations and for both species. Pod and peduncle lengths as well as flowers number were the most discriminant variables between populations. Differences were also found for variables like seed number per pod, seed yield and dry matter production. Significant correlations were found between plant traits and the environmental parameters of the origin sites. This study revealed enough variation among populations to initiate a selection programme for pasture improvement in arid and semi-arid areas of Tunisia, where the two species are well adapted. This revised version was published online in July 2006 with corrections to the Cover Date.     

Introduction: That most remarkable of outside men – Harold Brookfield's intellectual legacy

Abstract: Harold Brookfield's academic career spans more than half a century, traversing small tropical and subtropical islands and mountainous uplands, focusing on people–environment relations and linking to a diversity of institutions and disciplines. His unwavering commitment to fieldwork at the local level and to comparative study is paralleled by a healthy scepticism with respect to academic trends and orthodoxy of any kind, whether intellectual or physical. It is the farmers of the developing world who are the source of much of his inspiration. His theoretical contributions are based essentially on his observations of their practices and his learning from their experiences. His academic insights into the processes of change in rural areas of Melanesia, East and South‐East Asia, Africa and South America, where small‐scale ecological studies are linked to global forces, are of lasting significance.