入世后西部地区如何抑制第二次人才快速外流

加入WTO后，跨国公司和东部企业为争夺人才竞相出台了优惠的政策，导致了西部地区继改革开放之后第二次人才快速外流。西部地区必须从政府宏观和企业微观两个层面着手，采取一系列积极有效的政策措施，来抑制人才的快速外流。     

一种适合于B/S和C/S应用的经济型实体鉴别公钥密码器

针对我国电子政务发展的需求,提出一种适合于B/S和C/S应用的经济型实体鉴别公钥密码器方案,研究出相关密码算法,并论证了其安全性.与采用现有公钥密码算法的密码器相比,这种密码器能有效降低对硬件运算能力的需求,从而降低造价,若在居民身份卡系统等社会信任服务系统中推广,可为国家节省大量资金.     

大南宁都市圈形成背景下的区域综合生态保护策略研究

广西境内由南宁市、北海市、钦州市、防城港市组成的桂南经济区是广西乃至北部湾区域的核心经济区和最有竞争力的城市群，为适应大西南区域联动发展以及我国与东南亚经贸合作日益加强的发展趋势，今后本区城市群规模和辖区势必进行重新调整，并极有可能形成以大南宁都市圈为中心的环北部湾新兴经济增长极．以上述四城市为例，探讨与城市空间形态变化以及社会经济发展需求相适应的可行的区域综合生态保护策略．     

Environmental Issues of Geothermal Development in Yangbajing, Tibet and the Countermeasures

The pollution source and pollution state of surface water is respectively assessed with equal-standard-pollution-load index and Nemero index, and the habitans' health is assessed as well by comparison with pre-development of geothermal field. Results show that: 1 ) Three pollutive factors obviously fail to attain the required standards and their order sorted by impact degree is As＞F- ＞S2-. 2) The Nemero index of Donggua cross section of Duilongqu River is 0. 725and the water quality is at mildly-polluted level. 3) In Lhasa River, the Nemero indexes of cross sections affected by geothermal fields are much higher than that of the unaffected one, which shows the present and potential impacts of geothermal development. 4) Much more inhabitants nearby got trichomadesis sickness after geothermal development, which shows that the surface water pollution in this area has threatened the inhabitants' health. In addition, other environmental issues caused by Yangbajing geothermal development are analyzed and some countermeasures are proposed.     

发展生物技术 重视生态安全

论述了生物技术是现代科学发展与应用的结果，分析了在激素生产，新药品的开发，转基因动植物的应用，物种扩散与交流等方面所取得的主要成就，探讨了发展生物技术时应注意普及生物技术知识，做好安全性试验，重视社会伦理道德，立法及外来物种影响等问题。     

论档案信息资源的开发与利用

简要介绍了开发利用档案信息资源的重要意义，提出了提高档案信息资源利用率的措施和方法，包括：做好档案的收集工作，实现档案的现代化管理，为用户提供多层次的服务等。     

层次分析法在城市土地分级中的应用

探讨了用层次分析法对城市土地等级进行定量评价的原理和方法，并以济南市为例进行实证研究，取得了较好的效果，为土地有偿使用和城市规划提供了依据。     

大理市土地资源人口承载能力之研究

大理市人地矛盾十分尖锐，深入开展本市土地人口承载力的研究有着很重要的意义。本文在讨论土地承载力研究内容（包括三个部分：（１）土地承载力测算；（２）土地承载力分析；（３）对策与措施的制定）的基础上，测算了本市土地在不同投入水平下的人口承载量，进而分析了本市土地的人口承载状况，划分了不同时期（１９９０年、２０００年、２０３０年）不同投入水平下的土地承载力类型。最后，提出了缓解本市人地矛盾的主要对策和措施。     

试述招标机制在企业中的运用

随着社会主义市场经济体制的建立、健全和日益完善，招标机制成为企业经营管理的客观需要，阐述了招标机制在企业中的具体运用，提出了在运用招标机制的过程中应注意的几个问题。     

The genetic diversity of cen-tral and peripheral popula-tions of ratlike hamster(Cricetulus triton)

The impact of habitat fragmentation and isolation on the genetic diversity of populations has attracted much attention in studies of meta-population and conservation biology. In this work, using the randomly amplified polymorphic DNA (RAPD) technique, we studied the genetic diversity of central, peripheral and peninsular populations of ratlike hamster, which were collected in five locations of the North China Plain and its surrounding areas, in 1999. The study revealed that, ⅰ) the genetic diversity of central population of Raoyang County＞the sub-central populations of Gu'an County and Taikang County＞the peripheral population of Shunyi District＞the peninsular population of Mentougou District; ⅱ) the genetic diversities of the five populations were positively correlated to the nearest distances to the peripheral line of population distribution; ⅲ) there were significant differences of gene frequencies of some RAPD fragments among the five populations. More RAPD fragments disappeared in peripheral populations than in central or sub-central populations. The frequencies of two RAPD fragments were correlated to the latitude. This study clearly indicated that the variation of the genetic diversities of the five populations was caused by edge effect and frag- mentation through the enhanced inbreeding and genetic drift, and thus supported the view that habitat fragmentation and related edge effect reduce the population genetic diversity.