Including spatial contiguity information in the analysis of multispecific patterns

In this paper we analyse an ordination method in which spatial contiguity information is included. The original method, proposed by Ver Hoef and Glenn-Lewin (1989), is extended, using graphs to describe spatial contiguity for several sampling schemes where locations are given. Extensions for two dimensional grids and for the case of discrete measures of abundance are analysed. Applications to simulated transect frequency data and real data collected on a regular grid are reported.     

MVC设计模式在水环境模拟中的应用

采用MVC软件设计模式能够有效的提高软件的可扩展性、可维护性和代码复用率。并在此思想基础上探讨了利用该方法实现可灵活配置的水质模型系统,为实现动态的水质预测过程提供了一种新途径。     

系统决策与作物布局——徐州地区秋作物布局实例分析

作物布局是农业生产的一个重要环节,直接关系到农业生态系统资源输入(物质条件、科学技术、气候资源和生物资源等)的利用和转化效率的高低。因为系统输入的资源是非定常的,尤其是天气气候条件年际之间是不同的,本文在年型预测的基础上,确定在不同天气气候条件下的作物合理布局。     

关于深化环境科技体制改革的浅见

从跨世纪前夕的角度,论述了我国环境科技的主要任务及其改革重点,展望了环境科技机构在市场经济中新的发展模式,并分析了为推动环境科技发展的主要资金渠道的可能性。     

重磁相关分析应用于区域构造解析

本文旨在介绍一种简单易行的重磁相关分析方法及其在解析地质构造问题时的作用,该方法在湖南华容地区的应用收到了较好的效果。     

经济-环境系统的物质流分析方法比较研究

对基于物质流的工业代谢分析方法物质（材料）流分析法（Material Flow Accounting and Analysis,MFA）和实物投入产出法（Physical Input-Output Tables，PIOT）的特点进行了阐述。比较分析了2种方法的研究对象、范围、内容、应用等，给出了具体的分析表。     

中国煤炭供应行业格局优化及排放

随着中国经济发展进入新常态,煤炭行业正在发生巨大的变化。为降低中国未来煤炭供应行业总成本,在收集和分析行业现有格局及相关政策的基础上,研究优化未来中国煤炭产、运格局;并通过分析各地区煤炭供应行业的各个环节,最终核算出碳排放系数,再利用这些系数对优化格局下的煤炭活动产生的碳排放进行测算。结果显示：（1）在现有格局的基础上,在资源和政策的约束下,中国煤炭开发将不断集中化,山西、陕西、内蒙古、宁夏、甘肃、新疆的开发规模不断扩大,到2030年占全国总生产比例将近88%,比2015年提高17%;（2）煤炭调运压力先增后减,新疆、西南、东北等地区铁路运力不足,需不同程度地扩能;（3）2020年煤炭供应行业总排放约6.41亿t CO₂当量,单位供应排放比2015年降低8.75%,2030年总排放约5.26亿t CO₂当量,单位供应排放比2015年降低15.34%。在此基础上具体分析各地区煤炭生产、运输及排放情况,并提出了中国煤炭产业发展的相关对策建议,为煤炭行业相关决策和碳减排工作提供一定的支撑。     

Landscape pattern and its effect on ecosystem functions in Seoul Metropolitan area: urban ecology on distribution of the naturalized plant species

During land transformation process in the human history,naturalized plants were introduced to several land use patterns by the different ways of plant itself .Including some naturalized plants that had been contribute to land restoration,many naturalized plants have been invaded to original habitat or landscape for native plants.Once the plants were colonized,they extend their area and population size.Urban developed areas often give an impotant role of source habitat for naturalized plants and expanding their popuation size.In recent,this tituation is appearing as one of environmental problems about the urban landscape management controlling the naturalized plants that invaded in the developed area and conserving the native vegetation.This paper is focusing on relationships between distribution of habitat of naturalized plants and landscape patch in urban area in Seoul.Gengdong-Gu ,one of the administrative areas in Seoul was selected for this study.We examined the recent land use change using LANDSAT TM data and spreading of the representative naturalized plants(Robinia pseudoacacia and Eupatorium rugosum)by Seoul Biotope Mapping Project and field survey in 1999.As a result,these two species were often occurred in the same habitat and distributed in forest edge disturbed by man.Their distribution patterns were related to landscape indices (patch size and shape)in the forest edge.     

Growth pattern of reed in Caogang Lake,Huanghuaihai Plain,China

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东莞华兴电器厂生活污水人工快速渗滤处理系统

以渗透性能良好的天然砂作为主要渗滤介质建立人工快速渗滤系统处理生活污水 ,在东莞华兴电器厂进行了为期 1a的中试工程试验研究。结果表明 ,在不 <1m d的水力负荷条件下 ,人工快速渗滤系统对生活污水具有较强的抗冲击负荷能力和较好的污染物去除效果 ,其对SS、CODCr 和BOD5的平均去除率分别为 94 14 %、91 99%和94 4 4 % ;处理出水中SS、CODCr、BOD5、NH3 N及LAS的平均浓度分别为 4 0 6、2 3 2 0、9 0、5 16和 0 2 6mg L。采取间歇性淹水 落干的运行方式 ,并结合反冲洗 ,提高了CRI系统的水力负荷 ,改善了污染物去除效果 ,增强了其实用性。