供水管网漏损率因素分析及控制对策——以天津市为例

正供水管网漏损率高是供水行业面临的难题,给行业发展造成了很大困扰,在很多地区和城市,由于管网老化、漏损严重,供水企业甚至出现了长期亏损的局面。目前,国内大、中、小城市的管网漏损率均处于较高水平。从住建部获悉,根据对408个城市的统计,我国城市公共供水系统(自来水)的管网漏损率平均达到21.5%~30%。因此,全国各城市都非常重视管网漏损率的控制工作,将控制管网漏损率作为衡量供水管网技术和运     

给水管网系统测压点优化布置方法研究

该文介绍了结合敢创给水管网动态水力模拟软件及管网系统测压点位置优选理论．应用VC6．0完成的给水管网灵敏度系数计算软件设计。并利用该软件对国内某大型供水管网系统中的测压点布置进行了分析，提出了新增测压点位置的优化布置方案。     

潍坊市供水管网水力建模与应用研究

阐述建立潍坊市供水管网水力模型的方法。并通过 SCADA 系统现场测试数据对管网动态水力模型进行了校核。该水力模型已成功地应用于潍坊市供水管网系统改扩建。     

影响城市供水管道爆裂的因素及对策

分析了莒南县自来水公司供水管网中各种引发爆管的因素，归纳了有效地降低爆管的发生、确保供水管网安全运行的多项措施。     

供水管网GIS的设计开发与发展趋势

简述GIS技术的发展过程,分析了供水管网GIS系统的功能需求、数据表达,概述供水管网GIS系统主要的开发方法和应用现状,预测了GIS在供水管理中的未来发展趋势。     

基于管网漏损的石家庄市供水行业价格规制分析

石家庄市供水行业的管网漏损增加了供水成本，影响了政府对该行业价格规制的有效性。因此，石家庄市供水行业价格规制包含两部分内容：首先，政府采取措施减少供水行业的管网漏损，降低成本；其次，选择合适的供水行业价格规制方式，增进社会福利。     

如何防止供水水质的二次污染

介绍防止供水二次污染的若干措施,如:严格依法用水、合理选用管材、提高管网施工质量、防止管网漏水、减少水在管网末梢的停留时间和加强二次供水设施的管理与维护等。     

浅谈GIS技术在供水管网中的应用

针对GIS技术的新发展,阐述了GIS技术的内容及其在供水管网中的应用,并提出了利用GIS技术提高供水管网管理水平的思路。     

智能模型在上海城市供水中的应用

该文介绍了上海城市供水管网的现状和在考虑供水量特点之基础上建立的供水量预测模型。通过利用上海市供水调度监测中心的中心城区供水量实际数据对此模型进行的验证表明，其在上海城市供水中有一定的实用价值。并对拟建的上海市应急决策支持平台做了基本的阐述。     

管网叠压供水设备应用研究

一、研究背景 管网叠压供水设备于2002年被建设部确定为科技成果推广项目．同年天津市建委转发建设部有关文件．对天津市管网叠压供水设备的推广工作提出要求。     

公用事业公有制的多种实现形式

分析了公用事业由国有独资经营向公有制多种实现形式转化必须把握好的几个方面。同时,政府应加强对公用事业的宏观控制力。     

Accuracy of the judgment of facial expression of emotions as a function of sex and level of education

The purpose of this study is to examine the recognition of facial expressions of six emotions as a function of sex and level of education (high school, college, university) of the subjects. Three hundred French-speaking citizens of Quebec had to judge which emotion was expressed in various facial stimuli presented on slides. Results show that overall, the recognition of emotions was very good. However, there were significant and strong differences between emotions and sex and levels of education did not have strong effects on the results.This research was supported by grant EQ-1717 from Fonds FCAC (Gouvernment du Quebec).     

浅析廊坊市加快科学发展的思路及措施

主要从思想建设、产业结构调整、城乡一体化方面探讨廊坊市抓住发展机遇,加快科学发展的思路。     

Developing understanding of the idea of communities of learners

The idea of a community of learners is based on the premise that learning occurs as people participate in shared endeavors with others, with all playing active but often asymmetrical roles in sociocultural activity. This contrasts with models of learning that are based on one‐sided notions of learning— either that it occurs through transmission of knowledge from experts or acquisition of knowledge by novices, with the learner or the others (respectively) in a passive role. In this paper, I develop the distinction between the community of learners and one‐sided approaches from the perspective of a theory of learning as participation, and use two lines of research to illustrate the transitions in perspective necessary to understand the idea of communities of learners. One line of research examines differing models of teaching and learning employed by caregivers and toddlers from Guatemalan Mayan and middle‐class European‐American families; the other line of research involves a study of how middle‐class parents make a transition from their own schooling background to participate in instruction in a public US elementary school.     

The frequency of sexual abuse and depression in a sample of street children of one of deprived districts of Tehran

The purpose of this study was to determine the frequency of sexual abuse and depression among street children who live in a deprived district of Tehran. The researchers used the K-SADS questionnaire and a clinical interview were used to evaluate depression and sexual abuse in 87 street children in Tehran. Eighteen (20.9%) of the children had been sexually abused. Depressed children were 3.2 times more likely to be sexually abused than non-depressed children. Furthermore, 26 girls (86.7%) and 27 boys (48.2%) suffered from depression. The frequency of depression demonstrated a significant association with the father's or breadwinner's history of imprisonment or unemployment. Interventional programs providing education and support should be implemented for street children.     

劳动法视域下新生代农民工权利缺失问题

中国经济崛起和城市化进程过程中农民工的贡献有目共睹,城市让生活更美好的诱惑使得中国的新老两代农民工从农村流入城市,2008年1月1日的《劳动合同法》和《劳动争议调解仲裁法》让社会看到了改善农民工权利状况的希望,然而新生代农民工的权利保护尤其是作为一名劳动者的权利保护的现状依然不如人意,没有救济的权利不是真正的权利、迟来的正义是非正义,每年岁末对于农民工权益的突击性保障并不能从根本上解决问题,把包括农民工权益保障的社会问题纳入法治框架内、通过探析新生代农民工权利阙如问题及原因进而发现从制度层面进行解决才是解决农民工权益保障问题的根本途径。     

学龄儿童健康行为研究方法述评

学龄儿童健康行为研究越来越得到重视,在未来周期性的研究中也面临着在快速发展的背景下保持较高质量、在有限的财政资源情况下持续提高、使趋势分析与修改问卷内容相适应、满足科学受众和政策受众的不同要求等挑战,因此,完善其研究方法成为当前迫切需要。     

“吸毒人员未成年子女监护问题”研讨会综述

针对吸毒人员对其未成年子女的监护不力或监护缺失的现状，深入探讨了终止、剥夺乃至转移吸毒人员监护权的问题。涉及到监护权转移实践方面的问题，与会专家提出了临时监护人，短、长期寄养家庭，机构性质的儿童之家，儿童福利院等多种监护权转移方案。对一些存有疑义的问题，则是需要系统研究、统筹规划的新课题。     

Mobility of students and attractiveness of universities. The case of Sapienza University of Rome

Human mobility is a complex and multifaceted phenomenon. While labour migration has been widely and deeply investigated – through theoretical and empirical analysis – other forms of mobility have received much less attention. Students' mobility is a peculiar form of temporary movement that can be considered as neither migration nor tourism. It is rapidly growing: in the period 1975–2005 the number of tertiary education students abroad increased fourfold, from 0.61 million to 2.73 million, following the trend of the internationalization of economy and globalization of culture. In 2009 almost 3.7 million tertiary students were enrolled outside their country of origin, an increase of more than 6% from the previous year.

In this paper we analyse the international mobility of university students, using a unique data set built through surveys conducted at the Sapienza University of Rome. The data collected cover a rich array of information on students' characteristics and backgrounds, provenance places, family conditions, individual aspirations, and job preferences. The empirical analysis of those data offers an opportunity for understanding a relevant part of mobility decisions of (prospective) highly qualified workers. The Sapienza University, moreover, is at present the largest university in Europe for number of students and a pole of attraction for both European and non-European students. This allows us to enlarge our analysis at a global level.