《中国环境科学》入网ChinaInfo(中国信息)网络资源系统《电子期刊》

为了实现科技期刊编辑、出版发行工作的电子化,推进科技信息交流的网络化进程,《中国环境科学》自1998年第1期入网“ChinaInfo(中国信息)网络资源系统《电子期刊》”.凡在本刊发表的论文将由编辑部统一纳入ChinaInfo信息服务系统,进入因特网提供信息服务.凡不同意将自己的论文纳入因特网传送交流的作者,请在来稿上注明.本刊所付稿酬包含刊物内容上网服务报酬,不再另付.ChinaInfo系统是由国家科技部立项,中国科技信息研究所组织实施,万方数据网络中心编辑制作的开放式因特网络信息资源系统,《电子期刊》作为国家“九五”科技攻关项目,是Ch…     

《中国环境科学》入网ChinaInfo(中国信息)网络资源系统《电子期刊》

为了实现科技期刊编辑、出版发行工作的电子化,推进科技信息交流的网络化进程,《中国环境科学》自1998年第1期入网“ChinaInfo(中国信息)网络资源系统《电子期刊》”.凡在本刊发表的论文将由编辑部统一纳入ChinaInfo信息服务系统,进入因特网提供信息服务.凡不同意将自己的论文纳入因特网传送交流的作者,请在来稿上注明.本刊所付稿酬包含刊物内容上网服务报酬,不再另付.ChinaInfo系统是由国家科技部立项,中国科技信息研究所组织实施,万方数据网络中心编辑制作的开放式因特网络信息资源系统,《电子期刊》作为国家“九五”科技攻关项目,是Ch…     

<中国环境科学>入网ChinaInfo(中国信息)网络资源系统<电子期刊>

为了实现科技期刊编辑、出版发行工作的电子化,推进科技信息交流的网络化进程,《中国环境科学》自１９９８年第１期入网"ＣｈｉｎａＩｎｆｏ（中国信息）网络资源系统《电子期刊》"．凡在本刊发表的论文将由编辑部统一纳入ＣｈｉｎａＩｎｆｏ信息服务系统,进入因特网提供信息服务．凡不同意将自己的论文纳入因特网传送交流的作者,请在来稿上注明．本刊所付稿酬包含刊物内容上网服务报酬,不再另付．ＣｈｉｎａＩｎｆｏ系统是由国家科技部立项,中国科技信息研究所组织实施,万方数据网络中心编辑制作的开放式因特网络信息资源系统,《电…     

卫星遥感与航空摄影在公路环评中的应用

卫星摄影对涉及大面积土地的工程项目特别有用。它被推荐用于初步研究、评价公路工程的一些主要环境因素，以及通过比较两次图象测量环境的时间与空间上的动态。航空照片可用来帮助绘出土地使用情况以供可行性研究之用。它们在没有制图资料，或者这类资料不准确或过时的情况下提供另一个绘图信息来源。它们在提供最新的制图证据方面也很有用。资料的准备方法是把各图象分成几个单元，给每个单元确定其图例，并对图象作像片判读，在此之后通常对几个代表性地块作现场核对。     

关于过剩Ar~(40)及其地质意义的讨论

过剩Ar~(40)是K—Ar法年龄测定和其它地质应用中遇到的一个问题。由于过剩Ar~(40)的存在,常导致测得的视年龄值较地质体的实际年龄偏离许多,有的甚至异常到高出地球年龄。过剩Ar~(40)的存在,一方面会影响对地质体年代的正确判断,但另一方面,它又提示了与地质体有关的许多有用的地质作用信息,特别是有关岩浆的生成、演化、物质来源以及后期的地质作用方面的信息。过剩A~(40)的存在和演化,受多种地质作用因素的影响。许多近代玄武岩中的深源捕虏体都有高含量的过剩Ar~(40),因而使玄武岩视年龄较其实际年龄高出许多。它们代表了上地幔的残留体,这已为人们所熟知。但中酸性岩浆中是否也有深源捕虏体,其中过剩Ar~(40)的性状如何,它们反映了哪些有意义的地质事件?有关这方面的研究资料,见诸于文献的还不多。本文以我们近年来的实际工作和其它有关资料为依据,从中酸性岩浆中的深源捕虏体的角度,试对过剩A~(40)及其有关的地质问题作一讨论,不妥之处请予指正。     

互联网信息安全管理系统的设计与实现

随着社会的发展与科技的日益进步,互联网在人们生活中的应用也越来越广泛。信息资源的安全备受人们的关注,亟须做出保护其安全的策略。本文基于目前互联网不安全的状况,来阐述如何设计以及实现管理系统,来保障信息的安全。     

<中国环境科学>入网ChinaInfo(中国信息)网络资源系统<电子期刊>

为了实现科技期刊编辑、出版发行工作的电子化，推进科技信息交流的网络化进程，《中国环境科学》自１９９８年第１期入网“ＣｈｉｎａＩｎｆｏ（中国信息）网络资源系统《电子期刊》”．凡在本刊发表的论文将由编辑部统一纳入ＣｈｉｎａＩｎｆｏ信息服务系统，进入因特网提供信息服务．凡不同意将自己的论文纳入因特网传送交流的作者，请在来稿上注明．本刊所付稿酬包含刊物内容上网服务报酬，不再另付．ＣｈｉｎａＩｎｆｏ系统是由国家科技部立项，中国科技信息研究所组织实施，万方数据网络中心编辑制作的开放式因特网络信息资源系统，《…     

《中国环境科学》入网ChinaInfo(中国信息)网络资源系统《电子期刊》

为了实现科技期刊编辑、出版发行工作的电子化，推进科技信息交流的网络化进程，《中国环境科学》自１９９８年第１期入网“ＣｈｉｎａＩｎｆｏ（中国信息）网络资源系统《电子期刊》”．凡在本刊发表的论文将由编辑部统一纳入ＣｈｉｎａＩｎｆｏ信息服务系统，进入因特网提供信息服务．凡不同意将自己的论文纳入因特网传送交流的作者，请在来稿上注明．本刊所付稿酬包含刊物内容上网服务报酬，不再另付．ＣｈｉｎａＩｎｆｏ系统是由国家科技部立项，中国科技信息研究所组织实施，万方数据网络中心编辑制作的开放式因特网络信息资源系统，《…     

《中国环境科学》入网ChinaInfo(中国信息)网络资源系统《电子期刊》

为了实现科技期刊编辑、出版发行工作的电子化，推进科技信息交流的网络化进程，《中国环境科学》自１９９８年第１期入网“ＣｈｉｎａＩｎｆｏ中国信息）网络资源系统《电子期刊》”．凡在本刊发表的论文将由编辑部统一纳入ＣｈｉｎａＩｎｆｏ信息服务系统，进入因特网提供信息服务．凡不同意将自己的论文纳入因特网传送交流的作者，请在来稿上注明．本刊所付稿酬包含刊物内容上网服务报酬，不再另付．ＣｈｉｎａＩｎｆｏ系统是由国家科技部立项，中国科技信息研究所组织实施，万方数据网络中心编辑制作的开放式因特网络信息资源系统，《电…     

因特网中文环境科技信息初探

对因特网中文环境科技信息资源类型、分布进行了初步探讨，介绍了有关信息单元的概况、环境科技信息、检索路径和使用方法等，并提出了环境科技信息资源的开发思路。     

如何在Internet上进行环境信息检索

在分析归类网上检索工具的基础上，介绍了如何从Internet网络上检索环境信息资料，并给出了一些有用的网址。     

Attitudes towards sex selection for non-medical reasons: a review

Early non-invasive fetal sexing is widely available over the Internet, leading to concerns about its possible use for sex selection. The aim of this review is to summarise the results of surveys describing lay attitudes towards sex selection for non-medical reasons to help address or inform such concerns. A search of electronic databases and key journals was supplemented by an Internet search and citation-tracking. Twenty-one quantitative studies were identified. Most were conducted in the US, with five recent studies in the UK and Germany. Most studies found that, overall, people were not in favour of sex selection. However, this varied from 94 to 18%. People may hold more negative attitudes when the method of sex selection is specified, particularly if this involves termination of pregnancy (TOP). Attitudes towards the general availability of sex selection are less negative than those towards personal use. Attitudes were consistently negative in German surveys. Little is known of such attitudes outside the US, the UK and Germany, and how such attitudes may change as new sex selection technologies become available. Studies of use of early non-invasive fetal sexing for sex selection for non-medical reasons are needed to assess the extent to which concerns about usage are justified and to assist in debates on how these might be most appropriately addressed. Copyright © 2006 John Wiley & Sons, Ltd.     

Specifications for an internet based clean technology information support system for SMEs

To address the increasingly pressing issue of environmental degradation, much effort have been dedicated to promote the use of cleaner technologies in the European Union (EU) Member States. Thus, efforts to produce information systems designed to attend companies with their technology acquisition process have been made. However, due to their restricted resources, the existing Technology Intelligence (TI) systems do not correspond to SME-specific needs. To fill this gap, the objective of this paper is to identify Small and Medium-Sized Enterprises' (SMEs) information needs in the field of clean technologies with the aim of making recommendations for the conception of an Internet based clean technology database destined for the use of European SMEs. Also, in order to evaluate to what extent these type of information systems are useful to SMEs when it comes to their technology acquisition process, four clean technology-related databases available on the Internet in English corresponding to one or more of the specifications previously identified in the first section have been selected and analysed. In conclusion, it was established that these information systems were found to be a sound first step for SMEs wishing to obtain concise first-hand knowledge on clean technologies. On the other hand, the time constraints of SMEs and the extent of the information available in such databases make them unfitting to serve as a suitable decision making tool. Incidentally, it might be interesting to consider the development of specialized information systems designed to help SME support actors attend SMEs with their clean technology acquisition process.     

生物物种信息平台建设进展研究

信息技术的突飞猛进和互联网的迅速扩张,为生物多样性信息的收集、存储、提交、检索、分析、传播和使用带来了革命性的发展。生物多样性数据和信息服务的内容逐步从单一的名录数据库建设转向为多学科交叉的综合信息服务平台。本文结合国家生物多样性保护专项,在介绍国内外主流生物多样性信息平台建设现状的基础上,分析了我国现有平台存在的问题,并对下一步如何完善和推进平台应用进行探讨。     

国际互联网在环境科研中的应用

针对环境科研工作者 ,介绍了在互联网上能够获得哪些与环境科研有关的资源及如何获得所需要的资料 ,使互联网能够更好地服务于我们的科研工作。     

Social media and scientific research are complementary—YouTube and shrikes as a case study

Fascination with animals and their behaviour is one the most prominent patterns persisting in all human cultures. During the last decades, however, technological development and public access to the Internet have increased the speed and the extent of information sharing at an unprecedented rate, in some cases even challenging the traditional methods used in science. In order to understand the extent of this influence, we focused on the behaviour of shrikes. Shrikes are an enigmatic group of songbirds with a unique behaviour of impaling prey. We employed an extensive Internet search on YouTube (YT), a very popular and increasingly important source of information worldwide, for videos recording shrikes. Our analyses revealed that the number of shrike videos on YT is strongly positively correlated with classical knowledge on shrikes from books and scientific articles. Our results also suggest that in some cases YT may provide an alternative source of information on shrike ecology and behaviour. YT videos may thus provide new insights into the study of certain species or subjects and help identify gaps in ecological studies, especially in poorly studied species.     

The effect of modelling expert knowledge and uncertainty on multicriteria decision making: a river management case study

To support decision making on complex environmental issues, models are often used to explore the potential impacts of different management alternatives on the environmental system. We explored how different model outcomes affect decision making. Two topics have our particular interest, namely (1) the influence of quantification of qualitative information on decision making, and (2) the influence of reflecting uncertainty in the model outcomes on decision making. We set up a survey, in which we use a case study describing a decision making situation in strategic river management. The survey was disseminated through the Internet. From the results we conclude that the quantification of information in itself does not necessarily change preferences, although the outcomes suggest that preferences converge when based on quantified information. When confronted with uncertainty information, respondents show a preference for the alternative with the smallest chance of negative impacts. The study shows that, whereas the modelling community often strives to provide the policy process with as good, and as detailed information as is possible, their assumption that this will automatically lead to ‘better’ decision making is not self-evident.     

GIS在城市重大危险源管理中的应用

在传统的危险源评价方法中 ,有关事故的空间信息常常未受到足够的重视。通过 GIS进行风险源管理 ,将能方便地表示城市各重大危险源的地理位置情况 ,和对危险源信息的录入、检查及查询 ;利用 GIS进行风险地图绘制 ,可以图示市区内不同地段或区域的相对风险大小 ,辅助城市管理者进行工厂选址与设计、区域和土地使用决策、危险物质运输路线确定等 ;在紧急事故发生时 ,GIS结合事故分析模型和专家系统能够加快事故处理方案的制定和执行     

SEM照片孔隙参数提取技术研究

扫描电镜技术对岩土体微观结构的分析起着越来越重要的作用,从SEM照片中获得定量化的信息参数是众多岩土工程研究者关注的问题。本文以湖南省郴州市王仙岭的黏性土SEM照片的二维和三维分析方法为例来说明SEM照片孔隙参数的提取,并对这两种方法所得结果进行分析比较,结果表明:通常采用的二维及三维分析方法所求得的孔隙率参数值往往偏大;在二维方法中合理选择分割阈值是孔隙率提取的关键,过大过小的阈值都会导致较大的误差;三维方法中需要考虑实际的颗粒形态而不能简单地按照像素值进行三维高程建模。     

Applications of biosensors for bacteria and virus detection in food and water–A systematic review

Biosensors for sensitive and specific detection of foodborne and waterborne pathogens are particularly valued for their portability, usability, relatively low cost, and real-time or near real-time response. Their application is widespread in several domains, including environmental monitoring. The main limitation of currently developed biosensors is a lack of sensitivity and specificity in complex matrices. Due to increased interest in biosensor development, we conducted a systematic review, com...