杭州市大气细颗粒物分粒径来源解析

利用安德森分级采样器采集大气细颗粒物样品,分析它们的质量浓度及无机元素、水溶性离子和碳等组分的含量.采用OC/EC最小比值法确定二次有机碳对细颗粒物的贡献,重新构建受体化学成分谱.使用化学质量平衡模型对杭州市区大气细颗粒物进行分粒径来源解析.结果表明,在小粒径段中,二次粒子和机动车尾气尘为主要贡献源类;在粗粒径段中,城市扬尘、建筑水泥尘和煤烟尘的贡献逐渐增多,二次粒子与机动车尾气尘的总分担率下降到50%左右.     

“化理论为方法，化理论为德性”“在新民”与“中国梦”实现的途径

“中国梦”的实现需要动力之源,其动力的主体是人民群众。在新的时代,要实现“中国梦”即中华民族的伟大复兴,实现“中国梦”的主体,必须顺应时代的潮流,要“作新民”,即必须完成“两化”即“化理论为方法,化理论为德性”的途径与步骤,只有这样,才能实现中华民族的“伟大复兴”即实现“中国梦”。     

Teaching Prospect Theory with the Deal or No Deal Game Show

Recent evidence indicates that decision makers are more sensitive to potential losses than gains. Loss aversion psychology has led behavioural economists to look beyond expected utility by developing prospect theory. We demonstrate this theory using the Deal or No Deal game show.     

一种光学分数傅里叶变换系统

An alternative way to perform fractional Fourier transform is proposed. The system is illuminated by a divergent beam. It has one more degree of freedom in arrangement than the previous system. Mathematically, the choice of focal length of one of the two lenses depends on an easily adjustable parameter which determines the location of illuminating point source.     

The Skills of Practical Writing for Tour Guide(Ⅱ)--Points for Attention

Totranslatetravelcommentary,manyplacesshould bepaidattention.Howevertherearethreekeypointsthat atourguideshouldgivemoreattentionto.Theyarethe interpretationofthesourcelanguage,structureofthe targetlanguageandchoiceoftherightword.Thefollowing isadiscussionaboutthesepointsforattention. i.Interpretationofthesourcelanguage Intranslating,understandingtotheoriginaltextisthe firststep.Differentunderstandingmakesdifferent translation.Itisthepre-conditiontomakeagoodversion. Therefore,readingtheorigin…     

软件开发中的资源共享研究

ActiveX、OLEDB、ODBC、ADO等技术 ,在软件开发中具有明显的资源共享意义。通过它们 ,共享思想可以在软件资源开发中得到应用。OSS的涌现 ,为软件开发中的资源共享开辟了新纪元 ,可避免重复开发造成的浪费 ,提高用户二次开发能力 ,有利于软件人员提高技术水平 ,等等。参考文献 6。图 1。     

梁漱溟乡村建设思想的哲学渊源

梁漱溟的乡村建设思想与其哲学思想存在着内在的逻辑:重内固本和儒化生命主义的哲学路向使他相信解决中国问题的工作必须从乡村入手,依赖乡村人自身的力量及其主体意识的觉醒;而慎变求稳的动静观、中庸调和的宇宙观及儒化的实用主义,使其乡村建设运动必然走上发展合作经济、平民教育等事业的改良道路。     

Screening for potential child maltreatment in parents of a newborn baby: The predictive validity of an Instrument for early identification of Parents At Risk for child Abuse and Neglect (IPARAN)

For preventive purposes it is important to be able to identify families with a high risk of child maltreatment at an early stage. Therefore we developed an actuarial instrument for screening families with a newborn baby, the Instrument for identification of Parents At Risk for child Abuse and Neglect (IPARAN). The aim of this study was to assess the predictive validity of the IPARAN and to examine whether combining actuarial and clinical methods leads to an improvement of the predictive validity. We examined the predictive validity by calculating several performance indicators (i.e., sensitivity, specificity and the Area Under the receiver operating characteristic Curve [AUC]) in a sample of 4692 Dutch families with newborns. The outcome measure was a report of child maltreatment at Child Protection Services during a follow-up of 3 years. For 17 children (.4%) a report of maltreatment was registered. The predictive validity of the IPARAN was significantly better than chance (AUC = .700, 95% CI [.567–.832]), in contrast to a low value for clinical judgement of nurses of the Youth Health Care Centers (AUC = .591, 95% CI [.422–.759]). The combination of the IPARAN and clinical judgement resulted in the highest predictive validity (AUC = .720, 95% CI [.593–.847]), however, the difference between the methods did not reach statistical significance. The good predictive validity of the IPARAN in combination with clinical judgment of the nurse enables professionals to assess risks at an early stage and to make referrals to early intervention programs.     

企业技术创新风险分析

实践证明,技术创新风险越来越成为我国工业企业技术创新的障碍.本文分析了企业技术创新风险的来源,讨论了企业技术创新风险管理的主要内容,并对企业技术创新风险评价问题进行了详细探讨.