Ranked set sampling: an annotated bibliography

The paper provides an up-to-date annotated bibliography of the literature on ranked set sampling. The bibliography includes all pertinent papers known to the authors, and is intended to cover applications as well as theoretical developments. The annotations are arranged in chronological order and are intended to be sufficiently complete and detailed that a reading from beginning to end would provide a statistically mature reader with a state-of-the-art survey of ranked set sampling, including historical development, current status, and future research directions and applications. A final section of the paper gives a listing of all annotated papers, arranged in alphabetical order by author.This paper was prepared with partial support from the United States Environmental Protection Agency under a Cooperative Agreement Number CR-821531. The contents have not been subject to Agency review and therefore do not necessarily reflect the views or policies of the Agency and no official endorsement should be inferred.     

农村环境质量区划的多元分析

本文提出了适合于农村环境质量区划的分区方法，即首先以主成分分析法分析农村环境质量问题，然后以多种聚类分析法取得一个初始分区系统，最后用判别分析法判别该初始分区系统中各区域单元的类型归属是否正确，对一些类型归属不恰当的作适当调整，最终得到农村环境质量分区系统。文章最后讨论了类型划分问题。     

遥感技术在土壤污染中的应用研究进展

近年来遥感技术不断地拓展着应用的领域和范围，在土壤污染方面得到了广泛的关注和应用。传统土壤污染的研究存在许多弊端，需要耗费大量时间和精力。遥感技术具有建模范围大、实时性短的特点，它的出现使这些繁琐的过程更加简化。特别是近些年来图像处理手段和无人机遥感技术的发展，极大地提高了该技术的应用精度。本文从遥感技术在土壤污染状况的识别、反演、监管和风险评估等方面的应用出发，列举了遥感技术应用过程中常用的反演手段和方法，梳理了监管数据来源和监管对象。通过目前土壤污染与遥感技术结合的发展现状，较为全面地回顾了国内外遥感技术应用于土壤污染的发展历程，总结了遥感技术应用于土壤污染的各个方面的进展，并对该方面的未来发展趋势进行了展望。     

运用电法勘探方法研究梁宝寺矿的浅层结构

梁宝寺煤矿是一个新建大型现代化矿井,实际揭露的地质及水文地质资料较少,在该矿井实施综合电法勘探-矿井高分辨率电测深和矿井音频电透视,解决了矿井地层、地质构造、水文地质等问题,较好地弥补了实际揭露的地质及水文地质资料较少的问题,为该矿安全生产提供了重要技术支持.     

环境空间分析中常用采样方法及其对空间结构表达的影响

采用几种采样方法在不同的采样密度下分别在两套模拟数据集上进行模拟采样，并以实验半变异函数为结构分析工具探讨了采样方案对具有不同空间分布特征数据的空间结构表达的影响。研究发现，采样密度与采样方法的选取都对空间结构的表达有显著影响。     

氰化废水的性质对净化方法选择的影响

本文论述了氰化废水的来源、性质及净化方法。介绍了如何根据氰化废水的性质正确选择净化方法。     

Topics of water sciences and technology

In the preceding series of contributions to ESPR typical examples from actual fields of water chemistry were presented on various topics: integrated water quality management, diagnosis of water bodies, therapy of aquatic systems, and fitness for aquatic systems. These contributions clearly showed the need and importance of more intensive research. In the principle committee III 'Basic Research' of the Water Chemical Society, various expert groups work on scientific backgrounds in these fields. Some relevant topics are selected in this outlook, mainly on interactions of solids with water, the role of environmental colloids, the development of modern biochemical methods for diagnosis, the impact of chemical speciation on bioavailability and water technology, and the development of advanced methods in water treatment technology. Innovative approaches to understand the interactions between pollutants, water and solids are crucial for assessment of contaminants with biochemical and analytical methods, for the development of new efficient technologies and for application of treatment methods with little or no waste and by-product formation.     

Aquatic Resource Conservation. The first Yangtze finless porpoise successfully born in captivity (4 pp)

Background As the sole freshwater subspecies of finless porpoise (Neophocaena phocaenoides), the Yangtze finless porpoise (N. p. asiaeorientalis) lives only in the middle and lower reaches of the Yangtze River and its appended Poyang and Dongting Lakes. As a result of human activity on the river, including over and illegal fishing, pollution, transportation and dam construction, the population of Yangtze finless porpoises has been steadily and rapidly decreasing during the past several decades, which leads the animal to be endangered. Methods For saving this unique animal from extinction, three corresponding measures, in situ conservation, ex situ conservation, and intensifying breeding research in captivity, were proposed and have been implemented since the 1980s. Results After successfully rearing the animals in captivity for almost nine years, the first Yangtze finless porpoise was successfully born in captivity on July 5, 2005. The calf is male, with a body length of 69cm. This is the first freshwater cetacean ever born in captivity. Conclusion The successful birth of this calf confirms that it is possible to breed the Yangtze finless porpoise in captivity. Furthermore, this will greatly benefit the conservation efforts, and also greatly bolster our on-going efforts to study the reproductivebiology of these animals. Recommendation More studies and efforts are expected to establish a sustainable, captive colony of the Yangtze finless porpoise, which will not only greatly expand our knowledge about the reproduction biology of this animal, but also help to redeem the wild population through a careful yearly 'soft releasing' process.     

Is the antipredatory response in behaviour reflected in stress measured in faecal corticosteroids in a small rodent?

Predation risk has been shown to alter various behaviours in prey. Risk alters activity, habitat use and foraging, and weight decrease might be a consequence of that. In mammals, studies on physiological measures affected by risk of predation, other than weight, are rare. We studied in two separate laboratory experiments foraging, hoarding behaviour and expression of stress measured non-invasively from the faeces in the bank vole (Clethrionomys glareolus), a common boreal rodent. Voles were exposed to predation risk using odours of the least weasels (Mustela nivalis nivalis). Distilled water served as control. In the first experiment, we found that foraging effort, measured as sunflower seeds taken from seed trays filled with sand, was significantly lower in trays scented with weasel odour. Both immediate consumption of seeds and hoarding were affected negatively by the weasel odour. Females hoarded significantly more than males in autumn. In the second experiment, the negative effect of weasel odour on foraging was consistent over a 3-day experiment, but the strongest effect was observed in the first night. Foraging increased over the time of the experiment, which might reflect either energetic compensation during a longer period of risk, predicted in the predation risk allocation hypothesis, or habituation to the odour-simulated risk. Despite decreased foraging under predation risk, stress measured as corticosteroid metabolite concentration in vole faeces was not affected by the weasel odour treatment. In conclusion, we were able to verify predation-risk-mediated changes in the foraging effort of bank voles but no physiological stress response was measured non-invasively, probably due to great individual variation in secretion of stress hormones.     

镉与铜的分离与测定研究

设计出离子交换分离法分离与测定Cd2 和Cu2 的实验方案及实验步骤,摸索出分离与测定Cd2 和Cu2 的最佳实验条件.