辽东湾海域富营养化评价指标体系的构建

通过回顾近几十年来多位学者针对辽东湾海域富营养化开展的研究工作,提出将层次分析法应用到辽东湾海域富营养化评价当中,建立一套指标评价体系.根据各评价因子的层次关系构造判断矩阵,应用Matlab 6.5计算软件编程,确定各指标的权重,建立以富营养化水化因素和生态因素两方面指标为基础的综合评价指数模型,对辽东湾海域富营养化进行综合评价.     

海洋科技综合实力评价指标体系研究

现代海洋经济对海洋高新技术高度依赖,抢占海洋科技"制高点"也已经成为世界海洋强国争夺海洋权益的主要特征.我国海洋科技已取得重大进展,但与发达国家仍存在较大差距.文章通过对海洋科技及其综合实力的界定,利用解释结构模型方法,构建一套完整的海洋科技综合实力评级指标体系,为正确测评海洋科技综合水平和制定未来海洋科技发展规划提供研究基础.     

油气资源分类及评价方法

对我国油气资源评价工作中常用的基本概念与评价方法进行了详细阐述,其中包括美国石油工程师协会（SPE）、俄罗斯和我国新实行的油气资源分类标准和基本概念;将油气资源评价方法分为：成因法、类比法、统计法、德尔菲（Delphi）法4大类;较详细的介绍了盆地模拟法、氯仿沥青“A”法、有机碳法、面积丰度法、体积丰度法、统计趋势预测法、油气田（藏）规模概率分布法、地质因素分析法、圈闭法等具体评价方法,并简要分析了它们的适用范围和特征。     

阳江核电厂附近海域生物辐射影响评价研究

随着辐射防护理念的发展,环境中生物所受到的辐射影响日益引起人们的关注。本文使用ERICA项目中推荐的辐射影响评价方法,对阳江核电厂运行后对附近海域中海洋生物的辐射影响进行预测和评价。剂量率估算结果显示,阳江核电厂的液态放射性流出物对附近海域海洋生物造成的辐射剂量率不会超过7.47×10–3µGy.h–1,远低于国际上推荐的保护生物的辐射剂量率控制值,也低于本底辐射剂量率,因此,阳江核电厂正常运行后对附近海域中的海洋生物不会造成不利的辐射影响。     

Ecosystem health assessment of Honghu Lake Wetland of China using artificial neural network approach

Honghu Lake, located in the southeast of Hubei Province, China, has suffered a severe disturbance during the past few decades. To restore the ecosystem, the Honghu Lake Wetland Protection and Restoration Demonstration Project (HLWPRDP) has been implemented since 2004. A back propagation (BP) artificial neural network (ANN) approach was applied to evaluatinig the ecosystem health of the Honghu Lake wetland. And the effectiveness of the HLWPRDP was also assessed by comparing the ecosystem health before and after the project. Particularly, 12 ecosystem health indices were used as evaluation parameters to establish a set of three-layer BP ANNs. The output is one layer of ecosystem health index. After training and testing the BP ANNs, an optimal model of BP ANNs was selected to assess the ecosystem health of the Honghu Lake wetland. The result indicates that four stages can be identified based on the change of the ecosystem health from 1990 to 2008 and the ecosystem health index ranges from morbidity before the implementation of HLWPRDP (in 2002) to middle health after the implementation of the HLWPRDP (in 2005). It demonstrates that the HLWPRDP is effective and the BP ANN could be used as a tool for the assessment of ecosystem health.     

Application of matter-element model in soil nutrient evaluation of ecological fragile region

On the basis of the soil environment investigation in Da'an City, Jilin Province, China, 40 soil samples from main land use types were obtained and tested by standard method. Soil organic matter (SOM), total N (TN), total P (TP), total K (TK), available N (AN), available P (AP) and available K (AK) were chosen as the evaluation factors. A regional soil nutrient evaluation model was developed based on the matter-element model. The results show that the soil samples with nutrient grade Ⅱ-Ⅴ respectively account for 10%, 30%, 32.5% and 27.5%, and those with grade Ⅳ and Ⅴ account for 60% in all samples. The relationship between soil nutrients and land types indicates that the nutrients of farmland are relatively good, with 41.7% of soil samples with the nutrient grade Ⅳ and Ⅴ. The nutrients of saline-alkali land and sandy land are the worst, with 100% of soil samples with the nutrient grade Ⅳ and Ⅴ. And the ratios of soil samples grade Ⅳ and Ⅴ in grassland and wasteland are respectively 62.5 % and 54.55%. Generally speaking, the soil nutrients status in Da'an City is poor, 60% of soil samples are in poor and extremely poor conditions, indicating that the soil has been severely eroded. Being a relatively superior evaluation method with more accurate resuits and spatial distribution consistency, matter-element analysis is more suitable for regional soil nutrient evaluation than previous models.     

1:5万区域化探样品分析测试的质量监控

依据《地质矿产实验室测试质量管理规范》,并结合山西省的地质情况建立了一套1:5万区域化探样品分析测试的质量监控体系。分四个部分详细论述了的1:5万区域化探样品分析测试的质量监控体系。过去1:5万质量监控体系完全是靠人工进行,效率低下;本质量监控体系与过去相比,不但节省了大量的人力、物力,而且更加准确、迅速,更能适应1:5万质量监控大量数据处理的需要。     

如何编制好土地开发整理项目招标文件

招标文件是招标投标活动中最重要的法律文件,它不仅规定了完整的招标程序,而且还提出了各项具体的技术标准和招标条件,是投标人准备投标文件和参加投标的依据,也是评审委员会评标依据和签订施工合同的基础,招标文件编制质量好坏直接影响招标活动的成败.根据国家有关规定,2003年开始,辽宁省全面推行了土地整理项目的招标制度.随着土地整理项目招投标活动的不断深入,在招标文件编制的格式、内容、相关条款,以及标段划分、工期确定、评标办法、评标细则等方面,存在着不同程度的问题,个别项目导致合同纠纷,增加了标段间的施工协调难度,同时也影响到项目建设质量和工期.     

矿产资源潜力评价

“在全国矿产资源潜力评价中,采用物探方法估算出辽宁、河北、四川、新疆、青海、安徽六省示范区还有相当可观的铁矿资源量。”这是日前在厦门召开的“全国矿产资源潜力评价典型示范中重、磁及遥感资料应用成果汇报及经验交流会”上获得的振奋人心的好消息。这次典型示范工作结束后,建立在示范工作经验和模式基础上的全国矿产资源潜力评价工作即将全面展开。     

论当前全面开展土地政策评价的重要性和必要性

"土地政策评价就是指对土地政策的实施效果所进行的分析、研究和判断,从而不断修定、补充完善、调整或取消土地政策.土地政策重在落实,开展土地政策评价是栓验政策执行情况的重要途径;但是无论在理论研究还是在实践操作层面.土地政策评价仍然是我国土地管理中的一个相对薄弱环节."