ICP—AES分析方法精密度评定方法研究

[目的] 通过研究提出一种新的精密度评定方法,用于评定ICP-AES分析方法精密度.[方法] 通过对ICP-AES分析方法全过程的分析和研究,可将影响实验室内部精密度的诸多不确定因素归纳为样品称量不确定度、试样的化学处理到试液定容整个过程的不确定度和校准曲线校准被测试液浓度等三种不确定度,采用实验室内不确定度评定试验替代国家标准GB6379中的实验室间的协同试验确定测试方法的重复性和再现性.[结果] 采用本文提出的精密度评定方法,其评定结果与实际监测的精密度结果相符.[结论] 该方法简单、快捷、节约大量经费;评定出来的精密度与通过精密度协同试验得到的重复性r和重现性R值相当,与ICP-AES分析方法的实际精密度符合.     

国外运营商告诉我们什么

近几年，全球移动通信获得了迅速发展。发达国家的移动电话普及率已经达到70％以上．有的地区甚至接近100％。到2005年6月底，我国移动用户数量已经达到3．6亿．移动电话普及率达到26部／百人。从1997年以来．移动通信用户数平均每年增长60％。中国现有的2G网络已经渐渐不能满足用户数快速增长和人们对通信需求的不断增加．3G技术是发展的必然趋势。     

Strengthening the Quality–Loyalty Linkage: The Role of Customer Orientation and Interpersonal Relationship

Customer loyalty has been suggested as the most important indicator of a firm's advantageous position relative to competitors. The effect of service quality on customer loyalty has been empirically proven in a variety of industries. For industries such as grocery wholesalers whose offerings seem to be almost homogeneous in the eyes of retail customers, by implication, service quality in itself may be insufficient. Therefore, this study aims to explore how to strengthen the effect of service quality on customer loyalty. In this study, we propose that customer orientation and interpersonal relationship may reinforce the quality–loyalty linkage. The empirical results showed that all three variables independently had significant power in discriminating among three levels of loyalty (high, medium, and low). Customer orientation and interpersonal relationships also functioned as moderators that strengthen the effect of service quality on customer loyalty. Moreover, customer orientation had a greater moderating effect than interpersonal relationship. The research findings could, we believe, assist wholesale managers to allocate their resources more effectively to establish customer loyalty in an era of fierce competition.     

高新技术产业区域技术生态位评价研究

本文选取20个具有代表性的指标构建评价模型,采用因子分析法,对我国各省、市、自治区的技术生态位进行了综合评价,并对地区间产生的差异性进行了分析和讨论.     

如何提高大豆高产栽培技术

种植大豆因受品种特性、气候条件等影响,播种后不能适期出苗、出壮苗和全苗,苗期生长还能受病虫草危害,造成苗稀、苗弱,产量低,品质和效益差;我国加入WTO后,大豆生产将面临更加激烈的国际竞争.质量不高、加工品质较差,混种、混收、混销是阻碍我国大豆进一步发展的主要限制因素.     

International strategies of mid-sized firms: A comparison of Indiana and Guangdong Province

A China strategy is becoming more important for a growing number of mid-sized companies as they observe China's increasingly greater impact on the U.S. economy. Our study surveyed Indiana and Guangdong firms to assess their interest in future international engagement in the other's country. Our results confirm current engagement by mid-sized firms from both countries in some activities with the other country, but there is a strong interest in doing more. Hence, there are opportunities for many Indiana organizations to play a role in assisting Indiana firms in developing international expertise, business development, and knowledge of China. In the study, 97 firms from the Guangdong Province and 105 Indiana firms identified their current international activities as well their future intentions relative to business development in the other's country.     

城市供水:涨价意味着什么?

<正>最近几年,全国各城市居民用水的价格上涨之声不绝于耳,据统计,2005年全国居民用水价格涨幅达到7.8%,2006年又有一些城市的水价大幅度上涨。     

用图解法绘制圆球面与回转二次曲面的交线

圆球面与回转二次曲面的交线投影于其公共对称面上,可得一条抛物线。本文用解析法研究了该抛物线的基本参数,得到解基本参数的图解法,从而可精确地确定交线。     

房地产投资决策中实物期权方法的应用

传统的净现值投资决策方法将不确定性视为一种损失,忽略了项目投资的灵活性和战略性,往往造成项目价值的低估,而实物期权弥补了NPV法的不足。本文将实物期权方法}J入房地产投资决策中,对比分析了传统净现值法的一些不足,介绍了实物期权的基本理论,并采用了B-S期权定价模型对房地产投资决策过程中蕴含的迟延期权进行了案例分析。     

农村税费改革后乡镇财政面临的困难与对策

农村税费改革一方面促进了乡镇财政的规范化,另一方面也使乡镇财政面临更加严重的收支缺口和债务压力,并最终影响农村基层政权的正常运行.税费改革对乡镇财政带来的负面影响并非改革本身所致,而是由于相关的配套改革没有及时跟上造成的.解决乡镇财政困难的思路和对策是,调整中央与地方财力分配比例,理顺政府间分配关系;合理划分中央与地方的税收管理权限,逐步建立相对独立和完整的地方税体系;尽快建立规范的政府转移支付制度,加大对困难地区的转移支付;审慎解决乡镇债务问题,化解乡镇财政风险;努力构建乡镇公共政府和公共财政.