佛山陶瓷工业区土壤重金属含量及生态风险评价

以佛山市禅城区、南海区、高明区及三水区的陶瓷工业厂区土壤为研究对象,分析厂区周边500 m内表层土壤(0～20 cm)的Cd、Cr、Pb、Cu、Ni、Zn等6种重金属含量,并采用单因子污染指数(Pi)法、内梅罗指数(PN)法、潜在生态危害指数(R I)法对土壤重金属进行污染和潜在生态危害评价.结果显示,高明区的6种重金属含量均未超过珠江三角洲土壤背景值,禅城区、南海区与三水区的Cd超过背景值的倍数最大,均超过背景值的4倍以上,但4个区的重金属含量均未超过工业用地标准.4个区的综合污染等级均属于安全等级,其中高明区的PN最小,南海区的PN最大,分别为0.07和0.34.多种重金属的潜在生态危害评价结果显示,禅城区与高明区为低风险,南海区与三水区为中等风险,C d的潜在风险系数Ei最高.研究表明,佛山市陶瓷工业区土壤重金属含量在工业用地标准中是合格的,但已存在潜在生态危害风险,在今后的生产和土地再利用时要做好重金属污染防治工作,需要重点关注对土壤Cd污染的防治.     

粮食游离氨基酸含量测定方法精密度及回收率分析

根据粮食中游离氨基酸的氨基与水合茚三酮反应生成蓝紫色化合物,采用比色法测定粮食中游离氨基酸含量。采用二因素随机区组试验设计和生物统计软件SSPSS11．5的单因素方差分析表明,本方法测定的粮食种类间游离氨基酸含量次序为大豆〉小麦=玉米〉糙米〉大米,其中大米游离氨基酸含量最低。该方法非常灵敏,加入标准亮氨酸2mg的回收率对谷物大于58．8％,对大豆大于20．2％,精密度小于20％。     

陕西省旅游手册营销图片内容分析

旅游手册成为各地开展目的地营销竞相采用的一个常用工具。以陕西各地旅游手册视觉图片为研究样本,构建图片空间场景-图片人物主体分类指标体系,对陕西省旅游符号展开内容分析。结果发现总体上陕西旅游地符号与其对象客体大致吻合,局部存在一些不和谐符号。陕西各地旅游宣传符号都试图营造出一幅"完美"旅游场景,构建一个精致美好的等待游客光临的空间。旅游地在生产者对旅游地宣传符号进行选择和构建过程中,已经以一种商品形式被制造出来,从而间接对游客及目的地产生一系列影响。     

关于“云消费”基本特征的研究

当前我们已经进入一个全新的以消费者为核心的商业时代——“云消费”时代.“云消费”在技术层面上表现为三大基本特征,即体现云消费发展内涵和容量的“云内容”,代表云消费终端平台的“云终端”,反映云消费的交易形式和支付方式的“云支付”.本文对此进行了较全面的研究.     

改进原料气取样方法 提高丙烯含量分析结果平行性

分析了目前原料气罐车三次取样丙烯含量极差较大的问题,阐述了如何改进原料气取样方法,提高丙烯含量分析结果平行性。     

Sex and Shock Jocks: An Analysis of the Howard Stern and Bob & Tom Shows

SUMMARY

Studies of mass media show that sexual content has increased during the past three decades and is now commonplace. Research studies have examined the sexual content of many media, but not talk radio. A subcategory of talk radio, called “shock jock” radio, has been repeatedly accused of being indecent and sexually explicit. This study fills in this gap in the literature by presenting a short history and an exploratory content analysis of shock jock radio. The content analysis compares the sexual discussions of two radio talk shows: Infinity's Howard Stern Show and Clear Channel's Bob & Tom Show.     

培养高职高专学生在制图教学中自学能力的探讨

本文主要阐述了教师不只是给学生传授知识、授业解惑,而更重要的是重视和加强学生自学能力的培养,是学生获取新知识的关键。     

关于高校思想政治教育课的几个问题

在高校思想政治教育应理论和实际联系;教学方法应是多种教育方法相结合;提高教学质量,关键在教师。     

Replicating Text: The Cumulation of Knowledge in Social Science

Obtaining a statistically significant result does not necessarily tell us whether we would obtain significant results in other, similar studies, particularly if the original sample sizes were small. This is why we are supposed to replicate experiments. The present study concerns social science events that cannot be repeated by virtue of their being historically situated. Among social science events, many textual data are datable and, by definition, unrepeatable. One solution to this quandary lies in bootstrap replications, which are based on the original data. A case in point is that of founding political speeches such as those that buoy the European construction. We analyze and compare 82 speeches made by President Delors over the period 1988–1994, and 28 by President Santer over the period 1995–1997. We have all these speeches (N = 110) concorded as to which words are used, how often, where, and when, with the help of a computer-aided content analysis package. We then test various hypotheses using replication bootstrap estimates, that is, by replicating the original sample a large number of times and recreating several thousand samples from the population so created.