基于三维一体的区域可持续发展指标体系构建理论

提出了基于三维一体的区域可持续发展指标体系模型。该指标体系反映了经济、环境、社会的整个过程 ,同时包含了压力、状态、响应模型。该区域可持续发展指标体系的建立为区域可持续发展评估指标的确立提供了依据     

试论我国环境行政强制执行制度

环境行政强制执行制度是环境执法的重要制度。大陆法系国家实行德奥模式而从法律上确立环境行政机关强制执行地位，英美法系国家一般实行美法模式而以诉讼方式实现环境行政强制执行，日本则有更为严格、完善的环境行政强制执行制度。比较上述模式后认为：基于我国国情，法律应赋予环境行政机关一定的直接强制执行权，明确环境行政强制执行与司法强制执行的权限，确立环境行政强制执行制度。     

斑马鱼基因组随机扩增DNA多态性研究

采用随机扩增DNA多态性（RAPD）技术，对毒性试验的模式生物斑马鱼（Danio rerio）基因组进行了分析。结果显示，在Amersham Pharmacia公司随机扩增引物系列中，分别在01号引物的829bp、534bp，02号引物的572bp，及06号引物的495pb，各出现1条稳定条带，而环磷酰胺作用后的斑马鱼基因组DAN随机扩增产物中，缺少了部分稳定条带。这可以明确判定受试斑马鱼的基因发生了改变，为水环境遗传毒性效尖的研究提供了初步的数据基础。     

环境影响综合评价灰色层次模型研究

针对水电工程环境影响综合评价问题，应用拓展的灰关联理论和最小二乘准则，建立了环境影响综合评价的灰色层次模型。以东江水电工程环境影响综合评价为实例说明了该模型的合理性、可信性。结果表明：此基工程使环境总体向理想的１８．１％     

环境承载力与环境扶贫

随着人类环境意识的觉醒与升华，引发了对自身生存环境的更深层次的思考。本文就环境承载力的内涵与外延以及它既会造成贫困又可解脱贫困的关键作用进行了研究和探讨。     

What do economic simulations tell us? Recent mergers in the iron ore industry

This paper investigates the European Commission's decision to allow a merger between two Brazilian iron ore mining companies, CVRD and Caemi, using data on the Direct Reduced Iron pellet market. By using a simulation model, we can directly simulate the total welfare effects from the merger and hence evaluate the merger from a new perspective. The results from our simulations suggest that the welfare effects are negative from the merger between CVRD and Caemi, which supports the conclusion drawn by the European Commission decision. By performing different simulations between hypothetical merger candidates, our results show that only mergers between small candidates have the potential to be welfare enhancing.     

用灰色模型预测我国铁路水害发展趋势

根据近１５ａ来我国铁路水害年断道时间和断道次数的数据特点，将不同程度水害年分为三个等级。在此基础上，建立了铁路水害的灰色预测模型。并用此模型预测了近期铁路水害大小和远期的发展趋势。这对于我国铁路水害防治的宏观决策具有指导意义。     

Simulation of vegetation dynamics and management strategies on south Texas, semi-arid rangeland

In this paper, we describe a model designed to simulate seasonal dynamics of warm and cool season grasses and forbs, as well as the dynamics of woody plant succession through five seral stages, in each of nine different plant communities on the Rob and Bessie Welder Wildlife Refuge. The Welder Wildlife Refuge (WWR) is located in the Gulf Coastal Prairies and Marshes ecoregion of Texas. The model utilizes and integrates data from a wide array of research projects that have occurred in south Texas and WWR. It is designed to investigate the effects of alternative livestock grazing programs and brush control practices, with particular emphasis on prescribed burning, the preferred treatment for brush on the WWR. We evaluated the model by simulating changes in the plant communities under historical (1974-2000) temperature, rainfall, livestock grazing rotation, and brush control regimes, and comparing simulation results to field data on herbaceous biomass and brush canopy cover collected on the WWR over the same period. We then used the model to simulate the effects of 13 alternative management schemes, under each of four weather regimes, over the next 25 years. We found that over the simulation period, years 1974-2000, the model does well in simulating the magnitude and seasonality of herbaceous biomass production and changes in percent brush canopy cover on the WWR. It also does well in simulating the effects of variations in cattle stocking rates, grazing rotation programs, and brush control regimes on plant communities, thus providing insight into the combined effects of temperature, precipitation, cattle stocking rates, grazing rotation programs, and brush control on the overall productivity and state of woody plant succession on the WWR. Simulation of alternative management schemes suggests that brush canopy removal differs little between summer and winter prescribed burn treatments when precipitation remains near the long-term average, but during periods of low precipitation canopy removal is greater under winter prescribed burning. The model provides a useful tool to assist refuge personnel with developing long-term brush management and livestock grazing strategies.     

基于24Model的矿工怠工行为 管理模式架构及策略研究

为减少矿工怠工行为,基于24Model研究矿工怠工行为的管理模式架构及策略。首先,基于冰山模型理论分析矿工怠工行为的影响因素;其次,基于24Model和行为修正理论提出集怠工行为识别、行为原因分析、行为管理策略选择和行为修正评估于一体的矿工怠工行为管理模式架构;最后,提出了针对性的管理策略。对于提高煤矿企业矿工的工作绩效具有重要的理论意义和实践价值。     

1025t/h四角切圆煤粉炉内空气过量系数对NO生成的影响

文章采用计算流体力学软件Fluent数值模拟了1 025 t/h四角切圆煤粉炉内的湍流扩散燃烧,分析了空气过量系数对炉内烟气速度、烟气温度和氮氧化物组分的影响。结果表明:空气过量系数会对炉内流场的空气动力学特性和温度场分布均匀性产生显著影响。煤粉炉膛最佳空气过量系数为1.07,此时炉内温度场、速度场和浓度场的分布可使燃烧中间产物HCN和NH_3较好的将燃料型NO还原为N_2,来充分发挥空气分级燃烧降低NO排放的功效。