篮球活动在课余生活中的影响及其应用价值

篮球运动已经成为现在最流行、最受欢迎的体育运动之一。本文调查了高校所在的500名大学生,研究他们是如何安排自己的余暇时间;课余时间所参加的体育活动;以及在课余时间选择参与的某一项运动的一些情况。     

上海市各区的可持续发展水平分析与评价

本文以上海市的16个区为研究对象,采用2010年上海各区的统计年鉴数据,从经济、社会、环境三个方面构建指标衡量体系,运用主成分分析与聚类分析法,对其可持续发展水平进行综合评价.我们的研究将上海市各区的可持续发展水平分为三个等级,其中浦东区是可持续发展水平最高的区,构成第一发展等级;上海郊区的闵行、松江等区位于第二发展等级;上海老城的黄浦、徐汇等区位于第三发展等级.在此评价基础上,我们分级别提出了提高上海市可持续发展水平的相关建议,具有一定的社会现实意义.     

改性马铃薯淀粉复合保鲜剂在红提保鲜中的应用

为探究改性马铃薯淀粉复合保鲜剂对红提的保鲜作用,使用改性马铃薯淀粉为基质,添加其他添加剂制成复合保鲜剂,通过正交实验,将所得复合保鲜剂应用于红提的贮藏保鲜,优化筛选保鲜剂最佳配方,分析比较最佳配方处理在常温下对红提贮藏期间品质指标的影响。复合剂的最佳配方为0.50%改性马铃薯淀粉、0.40%脱氢醋酸钠、0.40%甘油和4.00%氯化钙,在室温下能够有效保持红提的商品价值,在实际水果贮藏保鲜中有一定运用意义。     

A residual-based multivariate constant correlation test

We propose a new multivariate constant correlation test based on residuals. This test takes into account the whole correlation matrix instead of the considering merely marginal correlations between bivariate data series. In financial markets, it is unrealistic to assume that the marginal variances are constant. This motivates us to develop a constant correlation test which allows for non-constant marginal variances in multivariate time series. However, when the assumption of constant marginal variances is relaxed, it can be shown that the residual effect leads to nonstandard limit distributions of the test statistics based on residual terms. The critical values of the test statistics are not directly available and we use a bootstrap approximation to obtain the corresponding critical values for the test. We also derive the limit distribution of the test statistics based on residuals under the null hypothesis. Monte Carlo simulations show that the test has appealing size and power properties in finite samples. We also apply our test to the stock returns in Euro Stoxx 50 and integrate the test into a binary segmentation algorithm to detect multiple break points.     

探索新教具的开发与课堂利用

老师难用语言对教学中深奥难懂的概念及原理进行表达,可利用新教具形象直观地给学生讲解,教具特有的声音、图像、动作能增强学生的理解能力,能培养学生的学习兴趣,激发学生创新意识和创新精神,特别在职业教育教学实践活动中更能发挥其独有作用,有助于教学质量的提高。     

公司财务松懈:识别模型、经济后果与治理对策

资源基础理论与公司行为理论认为财务松懈缓冲外部环境突变,促进公司绩效提升,而代理理论认为公司囤积自由现金流量,诱发公司财务松懈行为,增加代理成本,有损公司绩效。本文借鉴波士顿矩阵模型思想,构建公司财务松懈识别模型,以沪深A股酿酒食品行业板块80家上市公司为样本,利用模型识别出40家上市公司为财务松懈公司,并针对财务松懈行为所引发的经济后果,提出相应治理对策,优化公司资源配置,提升公司绩效。     

Financial constraints and synergy gains from mergers and acquisitions

This paper examines mergers and acquisitions motivated by financial constraints. Synergy gain is measured as the cumulative abnormal return of a value‐weighted portfolio of the acquirer and the target around the acquisition announcement. By constructing a financial constraint difference between the target and the acquirer, we find a positive relationship between the financial constraint difference and synergy gains generated from the acquisition. The positive effect of the financial constraint difference is only significant for high growth targets and severely constrained targets. The acquirer's corporate governance also enhances the synergy gains created from the financial constraint difference. Additional evidence shows that both acquirer's and target's shareholders benefit from the financial constraint difference. Our results are robust for different measures of financial constraint.     

A new practice-driven approach to develop software in a cyber-physical system environment

Cyber-physical system (CPS) is an emerging area, which cannot work efficiently without proper software handling of the data and business logic. Software and middleware is the soul of the CPS. The software development of CPS is a critical issue because of its complicity in a large scale realistic system. Furthermore, object-oriented approach (OOA) is often used to develop CPS software, which needs some improvements according to the characteristics of CPS. To develop software in a CPS environment, a new systematic approach is proposed in this paper. It comes from practice, and has been evolved from software companies. It consists of (A) Requirement analysis in event-oriented way, (B) architecture design in data-oriented way, (C) detailed design and coding in object-oriented way and (D) testing in event-oriented way. It is a new approach based on OOA; the difference when compared with OOA is that the proposed approach has different emphases and measures in every stage. It is more accord with the characteristics of event-driven CPS. In CPS software development, one should focus on the events more than the functions or objects. A case study of a smart home system is designed to reveal the effectiveness of the approach. It shows that the approach is also easy to be operated in the practice owing to some simplifications. The running result illustrates the validity of this approach.     

国外车险里程定价理论与实践

基于里程定价的车险产品不但可以通过合理反映被保险人的保险成本以体现保费收取的公平性,而且一定程度上具有有效缓解交通堵塞、降低能源消耗、减少环境污染和温室气体排放等综合社会效益,目前已成为欧美发达国家车险市场上一款流行的产品。在系统梳理和总结国外车险按里程定价的理论与实践的基础上,对其进行了效益分析,并对实施中可能存在的问题进行了深入探讨,将为我国车险市场改革和产品结构升级提供启示,也为我国财险公司开发按里程定价的车险产品提供有益的理论支持和实践参考,以更加有利于我国车险费率市场化和非寿险公司的科学经营。     

农业大省开展农业循环经济的制约因素及对策分析

农业大省开展农业循环经济存在着农业资源短缺、农村面源污染严重、农业废弃物综合利用率低、农业科技水平低、农业劳动者文化素质低等问题。其制约因素主要是经济发展水平低所带来的"财政瓶颈"、农村金融体系不完善、法律法规不健全、农业循环经济评价指标体系及考核监督机制缺失。因此,农业大省开展农业循环经济应首先着力强化财政支持力度,尤其是加大中央财政对农业大省的转移支付力度,建立政府主导的农村政策性金融体系,不断完善农业经营制度,加快循环农业相关法律法规及评价指标体系的制定。