上市银行现金分红对公司价值影响的实证分析

以我国上市银行股利分配的数据为基础,采用事件分析法针对公司发放现金股利后的异常收益率进行实证分析,发现对我国上市银行公司的现金股利发放对公司价值不造成显著影响这一结论。     

高校网络舆论危机的应对机制

高校网络舆论危机的发展经过危机的潜在爆发期;危机的爆发期;危机的消散期。针对高校网络舆论危机的阶段性,应建立高校网络舆论危机的应对机制可以从预防,处理和反思三个方面着手,再根据高校网络舆论危机的特点,制定预防机制,监控机制、联动机制和危机的善后机制。     

8周指定强度训练对不经常锻炼女生强度-情绪反应的影响

29名不经常锻炼女大学生被随机分成2个实验组和1个对照组,采用RPE生成强度方案,实验组分别以RPE=11和RPE=16的强度训练8周,对照组自由活动,训练前和训练后3组被试均参加10min RPE生成强度运动,运动中3、6、9min及运动后5min自述主观运动体验,以检验不同指定强度训练对不经常锻炼者强度-感情反应的影响.结果显示,积极良好状态有组别主效应和强度×时间交互作用,无训练效应.心理苦恼有测试×强度×时间×组别交互作用.疲劳有测试×强度×组别、测试×强度×时间与强度×时间×组别的交互作用.研究暗示更高强度的健身训练使不经常锻炼者强度-情绪反应的变化更积极.     

当代汉语称赞应答策略的性别差异

当前汉语称赞应答策略在不同性别群体间存在一定的差异：虽然两个群体使用最多的应答策略都是含蓄接受,但女性在明确接受、间接拒绝等方面的称赞应答策略的使用频率都高于男性,男性更趋向于使用含蓄接受和直接拒绝策略;女性更多使用积极的礼貌策略并且强调人际交往的平等性和稳固性。     

Pairwise comparisons of treatments with ordinal responses in a two-way setting

In clinical studies, pairwise comparisons are frequently performed to examine differences in efficacy between treatments. The statistical methods of pairwise comparisons are available when treatment responses are measured on an ordinal scale. The Wilcoxon–Mann–Whitney test and the latent normal model are popular examples. However, these procedures cannot be used to compare treatments in parallel groups (a two-way design) when overall type I error must be controlled. In this paper, we explore statistical approaches to the pairwise testing of treatments that satisfy the requirements of a two-way layout. The results of our simulation indicate that the latent normal approach is superior to the Wilcoxon–Mann–Whitney test. Clinical examples are used to illustrate our suggested testing methods.     

The effect of product-harm crisis situations on firms’ spokesperson strategies: Evidence from China's emerging market economy

The purpose of this paper is to examine the influence product-harm crisis situations have on, a firm's spokesperson strategies in China's emerging market economy. Through the content analysis of, 127 product-harm crises, crisis type is found to be a predictor of spokesperson strategies. Compared, with Chinese brands, foreign brands are less likely to employ top-executive spokesperson strategies, during product-harm crises. Crisis severity was found to have no impact on the adoption of, spokesperson strategies.     

Protection of privacy in efficient application of randomized response techniques

In estimating the proportion of people bearing a sensitive attribute A, say, in a given community, following Warner’s (J Am Stat Assoc 60:63–69, 1965) pioneering work, certain randomized response (RR) techniques are available for application. These are intended to ensure efficient and unbiased estimation protecting a respondent’s privacy when it touches a person’s socially stigmatizing feature like rash driving, tax evasion, induced abortion, testing HIV positive, etc. Lanke (Int Stat Rev 44:197–203, 1976), Leysieffer and Warner (J Am Stat Assoc 71:649–656, 1976), Anderson (Int Stat Rev 44:213–217, 1976, Scand J Stat 4:11–19, 1977) and Nayak (Commun Stat Theor Method 23:3303–3321, 1994) among others have discussed how maintenance of efficiency is in conflict with protection of privacy. In their RR-related activities the sample selection is traditionally by simple random sampling (SRS) with replacement (WR). In this paper, an extension of an essential similarity in case of general unequal probability sample selection even without replacement is reported. Large scale surveys overwhelmingly employ complex designs other than SRSWR. So extension of RR techniques to complex designs is essential and hence this paper principally refers to them. New jeopardy measures to protect revelation of secrecy presented here are needed as modifications of those in the literature covering SRSWR alone. Observing that multiple responses are feasible in addressing such a dichotomous situation especially with Kuk’s (Biometrika 77:436–438, 1990) and Christofides’ (Metrika 57:195–200, 2003) RR devices, an average of the response-specific jeopardizing measures is proposed. This measure which is device dependent, could be regarded as a technical characteristic of the device and it should be made known to the participants before they agree to use the randomization device. The views expressed are the authors’, not of the organizations they work for. Prof Chaudhuri’s research is partially supported by CSIR Grant No. 21(0539)/02/EMR-II.     

Generally weighted moving average control charts with fast initial response features

The generally weighted moving average (GWMA) control chart is an extension model of exponentially weighted moving average (EWMA) control chart. Recently, some approaches have been proposed to modify EWMA charts with fast initial response (FIR) features. We introduce these approaches in GWMA-type charts. Via simulation, various control schemes are designed and then their average run lengths are computed and compared. Based on the overall performance, it is showed that the DGWMA chart is the best choice especially when the shift is moderate, and the GWMA charts provided with additional FIR feature have a good performance only in detecting large shifts during the initial stage.     

用于QR码自动识读的图像分析方法

对于所采集的条码图像,为了适应实时性的要求,以得到不同光照条件下的最佳阈值,该文提出了把直方图双峰法、OTSU法及NLNiblack阈值法结合起来的改进的自适应阈值法。实验证明了该方法具有高效性和稳定性。为了在条码分割图像中获取QR码的4个顶点,首先,根据3个位置探测图形的特性提出了一种新的方法以求取对应的3个顶点,同时利用QR码的特征提出挖空算法获取条码的边缘,再采用过已知点的Hough变换得到第4个顶点。实验证明该算法在各种采集条件下可有效地得到QR码的4个顶点。