高含硫污水中氨氮的测定

对东莞市展图石化公司的炼油厂高含硫污水中氨氮的分析进行试验，选择了炼油装置中有代表性的排污口进行采样，样品有柴油加氢、二催化、三催化、丙烷、焦化、四蒸馏、加氢裂化、渣油加氢等废水。水样预处理分别采用吹气法和硝酸铅沉淀法进行脱硫，然后蒸馏；水样的测定则采用纳氏试剂分光光度法和标准酸滴定法进行分析。通过比较吹气法和硝酸铅沉淀法脱硫，得出吹气法具有较高的准确度。比较纳氏试剂光度法和标准酸滴定法，发现用纳氏试剂光度法具有操作简便、快捷、准确度高等优点，适合该炼油厂水样的测定。     

高校毕业生就业率统计方法探析

随着我国由计划经济体制向市场经济体制转变，大学生就业也由统包统配向自主择业转变，高校就业率统计工作如何适应形势的发展，从而能够科学、准确地反映出高校实际的就业状况和办学水平，使之能够促进高校教育健康发展是一个值得研究的课题，本文主要总结了我国近年来就业率统计方式的形成、演变过程及现行就业率统计中存在的问题，为就业率统计方法的改革研究奠定基础。     

应用文写作教学方法探讨

应用文与社会生活息息相关,虽然其重要性被一再强凋,但应用文写作教学却似乎很难改变它的尴尬处境,教学效果难尽人意。为此,教者需要从新的教育理念出发,改变原有的教学模式,探寻有效的教学方法,达到激发学生学习兴趣,切实提高学生应用文写作能力的目的。     

教学对外汉语汉字字源教学法论略

汉字教学是对外汉语教学的重点、难点,很多外国学生看到汉字形体变化多端,便望而生畏以致打消了汉语学习的热情。因此探索对外汉字教学的有效途径就凸显了其急迫性和重要性。文章以汉字字源为分析对象,在对对外汉语汉字教学现状分析的基础上提出了汉字字源教学法,并着重就其内涵和价值进行了分析。     

企业如何建立自己的质量文化

企业质量文化是企业文化的组成部分,是以质量为中心,建立在物质文化基础上,与质量意识和质量活动密切相关的企业的物质活动和精神活动的总和。通过论述质量文化的含义、企业建立质量文化的意义,提出企业建立质量文化的方法。     

AM混合相Si:P:H薄膜的制备与分析

本文介绍了SiH_4/PH_3混合气体的高频辉光放电法,在硅、玻璃衬底上淀积的掺P氢化非晶硅膜的结构和特性,并对样品作了高温退火试验。应用x射线衍射和红外吸收,对淀积膜的结构性质作了探讨和分析。结果表明,所淀积的是一种微晶——非晶混合相掺P氢化非晶硅膜(AM-Si:P:H),这种膜具有良好的光电性能,较高的掺杂效率。经退火后,光电性能有所改善,是P-i-n太阳能电池所希望的n~ 材料。     

面向工程图学的计算机绘图教学与思考

传统的工程图学教学，其内容、方法、手段已远远落后于现实。作为计算机辅助设计与制造(CAD／CAM)技术的重要组成部分，计算机绘图(CAG)在现代工业制造过程中占据着举足轻重的位置。为了适应时代的发展，培养出具有时代气息的人才，在高校工科专业中应加强计算机绘图方面的教学。     

Algorithms Section: Introduction

Electronic Access to Algorithms
Applied Statistics algorithms are available on Statlib at Carnegie Mellon University and on the UK mirror of Statlib at the University of Kent. They may be accessed either via anonymous file transfer protocol (FTP) or by WWW mosaic.     

Researchers Behind Policy Development: Comparing ‘Age-Friendly Cities’ Models in Quebec and Wallonia

Based on a reflexive method, this article explores the roles of researchers behind Age-Friendly Cities and Environments. Referring to Michael Burawoy's division of sociological work (professional, critical, policy and public sociology), it is structured around the international comparison of two empirical case studies: Walloon region (Belgium) and Quebec (a province of Canada). While the first case shows some difficulties faced by a limited policy sociology perspective with little room for research, the latter presents a more developed public sociology approach with larger involvement from research. If both cases started with policy links, the latter presents a special interest for praxis, through knowledge transfer as an ongoing public dialogue. Based on this comparison, the article concludes with a twofold use of praxis: on one side – knowledge in action – a public sociology position offers an original perspective on what AFC/AFE may mean and produce to avoid a limited field of actions focusing only on some stakeholders or advocates for older people. On the other side – action in knowledge – policy and public sociology question professional and critical sociology facing AFC/AFE programmes: is a purely academic knowledge of such a programme epistemologically realistic or should it necessarily be empirically fuelled?     

The Attributes of Effective NGOs and the Leadership Values Associated with a Reputation for Organizational Effectiveness

Building on prior research characterizing organizational effectiveness as a social construction, this article identifies the perceived attributes of effective transnational nongovernmental organizations (NGOs) and the leadership values associated with higher reputations for organizational effectiveness. Results are based on an in‐depth, mixed‐method interview study of 152 NGO leaders located in the United States and representing all major sectors of organizational activity. Among the twenty‐nine attributes that leaders identified in peer organizations that they regarded as particularly effective, leaders stressed instantiation of sound principles or strategy, a grassroots approach, large organizational size and resources, being collaborative, singleness of focus, campaigning abilities, funding and fundraising prowess, global scope, and quality people. Furthermore, statistical analysis reveals that NGOs with leaders who value similarities with peer organizations, grassroots approaches, diversity of strategies, dedication, professionalism, and distributed organizational structures have significantly higher reputations for effectiveness.