塑胶运动场不应该立即叫停

近年来,由于塑胶运动场地环境污染的相关因素而导致人们对塑胶健身环境的安全和卫生开始担忧.有些专家提出对塑胶运动场应立即叫停,本文对我国塑胶运动场目前存在的一些问题进行了全面分析研究.探讨了是否应该立即叫停塑胶运动场的问题.     

美元下跌情况下国际货代企业如何规避汇率损失

自2005年7月21日人民币汇率机制改革以来,美元兑人民币的汇率持续下跌,由当时1:8.3的中间价,到目前为止,累计跌幅已达22.89%。在此过程中,广大以美元计价和结算手段的国际货运代理企业,均承受了巨大的汇兑损失压力,缩小了利润空间。而美国国会参议院在今年10月11日通过了《2011年货币汇率监督改革法案》,则预示着美元兑人民币的汇率将持续并加快下跌。国际货运代理企业由于行业的特殊性,公司的毛利基本上以美元体现,而且毛利率相对固定。如船公司给货代公司的约价是3000美元,货代公司留取150美元的差价出售,市场上出口工厂或外贸     

连云港港：建设深水良港迈进亿吨大港

连云港港南靠云台山，北倚连岛，取“连岛”与“云台山”首字为港名。连云港港始建于1933年，由原陇海铁路局筹资、荷兰筑港公司承建的海运码头，于1936年完成第一期工程，仅有能停靠6艘3000吨级海轮码头两座。后历经战乱，到解放前夕，连云港港已是一个码头坍塌，航道淤塞，濒于瘫痪的港埠。1949年港口吞吐量仅为5．6万吨。新中国成立以来，连云港港发生了翻天覆地的变化。尤其是经过改革开放30年的发展，今天的连云港港已成为我国综合运输体系重要枢纽和沿海主要港口，成为“新亚欧大陆桥东方桥头堡、中西部地区最便捷出海口、长三角地区主要深水海港”，迈入中国沿海深水大港行列：今年将跻身于中国沿海亿吨大港行列。     

关于保险行业文化建设的思考

行业文化是行业发展的软实力。先进的保险行业文化,有助于增强行业可持续发展能力,提升行业的凝聚力,彰显行业精神,树立行业良好形象。本文拟从促进行业科学发展的角度,总结提炼先进保险行业文化应包含的核心要素,进而探索保险行业文化建设的基本要求与实现途径。     

Social network contingency,symbolic management,and boundary stretching

A firm's structural position within corporate networks may affect the extent to which it engages in boundary stretching practices. Since social norms support low CEO compensation, offering high CEO compensation in China can be seen as a boundary stretching practice. Setting up a compensation committee (CC) may be viewed as a form of symbolic management in China. We argue that firms operating within central corporate network positions opt to pay higher CEO compensation without engaging in symbolic management. On the other hand, firms operating in structural hole positions tend to either pay lower CEO compensation or use CCs as a symbolic management tool in order to pay higher CEO compensation. Our hypotheses are largely supported based on 7,618 firm‐year observations in China. Copyright © 2013 John Wiley & Sons, Ltd.     

苯及其衍生物的密度泛函理论研究

采用密度泛函理论B3LYP/6-31G*方法对苯及其衍生物进行结构优化,并对其稳定性、电荷布局、振动频率进行分析讨论。结果表明:当苯环上的一个氢被-CH3、-NH2、-OH、-OCH3取代后,其结构稳定性依次增强;邻对位碳原子具有较高的负电荷,所以邻对位易于发生亲电取代反应;取代基为-CH3的C-H伸缩振动向短波方向移动,-NH2、-OH、-OCH3使C-H伸缩振动向长波方向移动。找到了苯及其衍生物之间存在的规律,为实验研究提供理论指导。     

Is the Annual Earnings Response Coefficient Statistically Significant in Brazil?

The aim of this paper is to analyze the significance of firm-specific and pooled earnings response coefficients in the Brazilian market. The lag structure of earnings-return relations is also analyzed. The sample consists of 61 Brazilian public firms that represent all firms with a minimum of seven continual data from 1995 to 2008. The analysis is based on linear regressions of two different proxies of earnings and two different proxies of return. The results show that, for firm-regressions, few companies presented a significant relationship between earnings and stock returns, and for some firms a negative coefficient was found. In the pooled regressions a positive and statistically significant coefficient was found, and the tests suggest that variance in cross-sectional observation is more relevant in explaining the earnings response coefficient than the time-series variance.     

Knowledge and Technology Transfer Relationship between a Research Center and the Production Sector: CIMAT Case Study

This article presents a study of the adoption of a knowledge and technology transfer model at the Center for Research in Mathematics in Guanajuato state, Mexico, in order to define the model that would produce the best outcomes for establishing a transfer relationship with industry, the government, and academia. The transfer of organizational models and practices is a phenomenon that occurs frequently in dynamic globalized organizational contexts that underpin ongoing quests for greater and faster development, while also adapting and exchanging innovative products and services. This article presents theoretical input from specialized entities and authors focused on knowledge and technology transfers at universities and research centers. The methodological strategy used in these research projects adopts a qualitative approach, with the study of an explanatory case study being the methodological tool, together with document analyses and semi-structured interviews. After the results have been obtained, the mechanisms used by the Center were identified for relating to the production sector, noting that this relationship involves high-level direct transfers. Positive outcomes were found that benefitted the Center and the company studied, underscoring the importance of government research centers having a knowledge and technology transfer model allowing identification of the contextual, technical and structural conditions that shape underlying transfer relationship at this Center, as well as the surrounding regions.     

电感耦合等离子质谱法测定轻烧镁中铅、镉、砷、汞

建立了使用电感耦合等离子质谱法测定轻烧镁中铅、镉、砷、汞的方法,对测试条件和影响因素进行了探讨。实验表明,该法快速准确,测试检出限8 ng/L-220ng/L,回收率98.4%-110.1%。