AHP法在区域矿产资源综合经济评价中的应用

本文运用AHP法对某省20种主要矿产进行了综台经侪评价,确定了该省经济优势矿产、潜在优势矿产和劣势矿产,为制定该省矿产资源开发战略提供了科学依据。     

微型电机端盖整形模设计

根据端盖的特殊要求,设计了一副整形模,一次性地达到了制件的尺寸精度和各部形位精度.模具结构简单,实践证明可行.     

开展对环境无害的煤炭革命保护全球环境

发展中国家正处于工业化起始和发展阶段,煤炭的开发和利用逐年增多,这将造成对环境的污染。因此,包括中国在内的发展中国家,面临着能源结构和能源利用方式一次新的战略变革,这种变革使资源消费型发展模式,转向资源节约模式。中国本着负责的态度,在发展经济的同时始终把环境保护作为一项基本国策。但限于发展中国家财力和技术条件有限,我们希望国际社会建立保障环境安全和发展的国际资金机制,包括以优惠或非商业性条件转让环境保护有益的技术和提供足够的、新的和额外的资金以推动新技术的应用。     

电磁信息观测仪的标定

本文根据电磁信息观测手段的实际工作需要,简明地阐述了电磁信息观测仪的标定意义,标定精度要求及基本标定方法。为电磁信息资料的定量分析做了一些基础性的工作。     

拉延成形中拉延筋的摩擦分析

此文建立了一种用拉延筋单元模拟试验器测试拉延筋摩擦系数的方法,同时对成形中的摩擦润滑进行了试验研究和分析。     

The curve of ion exchange ratio(%)-pH of the interaction between suspended particles with Cd(Ⅱ) in the Yellow River

Ｔｈｅｃｕｒｖｅｏｆｉｏｎｅｘｃｈａｎｇｅｒａｔｉｏ（％）ｐＨｏｆｔｈｅｉｎｔｅｒａｃｔｉｏｎｂｅｔｗｅｎｓｕｓｐｅｎｄｅｄｐａｒｔｉｃｌｅｓｗｉｔｈＣｄ（Ⅱ）ｉｎｔｈｅＹｅｌｏｗＲｉｖｅｒＹａｎｇＨｏｎｇｗｅｉ，ＪｉａｏＸｉａｏｂａｏ，Ｇｕ...     

Techno-economic analysis of municipal wastewater land treatment systems in China

This paper analyses the capital costs, power consumption and operation costs of municipal wastewater land treatment systems, including rapid infiltration, slow-rate infiltration, overflow and constructed wetland, by means of series engineering design. The results show that land treatment can save 50-70% of capital costs, 80-90% of power and 75-85% of operation costs when compared with secondary treatment.     

Plug-flow/dispersion model of longitudinal dispersion

A modified Fickian plug-flow/dispersion model (P/D model) is developed in this study. In P/D model, the flow process is divided into two belts, plug flow belt and dispersion belt. P/D model is very similar to Fickian model and rather perfect. The prediction by P/D model can be always consistent with experimental data in river, flume, and pond, even though the data are much skew. Therefore, P/D model is better than Fickian model and other dispersion models.     

Identification of 1-hydroxypyrene in urine of dogs after pyrene injection and its excretion

With high performance liquid chromatograph and fluorospectrometry, 1-hydroxypyrene is identified as a metabolite of pyrene in the urine of dogs after intramuscular injection of pyrene. When three successive doses of 1,2 and 5 μmol/kg wt. pyrene administered, urinary excretion of 1-hydroxypyrene reaches the peak level between 24th and 48th hours. Excreted 1-hydroxypyrene consists of only about 0.05% of injected pyrene.     

From economic prosperity to ecological sustainability──A theoretical and practical concern of sustainable development in China

Ｆｒｏｍｅｃｏｎｏｍｉｃｐｒｏｓｐｅｒｉｔｙｔｏｅｃｏｌｏｇｉｃａｌｓｕｓｔａｉｎａｂｉｌｉｔｙ──ＡｔｈｅｏｒｅｔｉｃａｌａｎｄｐｒａｃｔｉｃａｌｃｏｎｃｅｒｎｏｆｓｕｓｔａｉｎａｂｌｅｄｅｖｅｌｏｐｍｅｎｔｉｎＣｈｉｎａＷａｎｇＲｕｓｏｎｇ，Ｈｕ...