论光污染民事责任的承担

随着环境问题的日益严重,环境侵权责任研究得到了理论与实务界的广泛关注。但环境侵权种类繁多,涉及各种领域和行业,因此,欲有效地规制环境侵权、对环境侵权的受害人进行恰当的救济还需要对环境侵权进行类型化、具体化研究。光污染侵权是一种新型的环境侵权类型,其在侵权行为的认定、损害赔偿、民事责任的承担方式等方面都有其特殊之处,对光污染侵权的民事责任的承担进行专门的研究有助于法律适用,也有利于推动光污染单行法的立法进程。     

投资偏好与“特质波动率之谜”——以中国股票市场A股为研究对象

与价格走势平平的股票相比,投资者更愿意选择过去价格变化幅度较大的股票。这种投资偏好是否是产生“特质波动率之谜”的原因呢？本文以中国股票市场A股为研究对象,首先验证中国股票市场“特质波动率之谜”的存在性。随后组合分析和Fama-MacBeth横截面回归分析发现,价格极差可以在一定程度上解释但不能完全解释“特质波动率之谜”。横截面回归结果表明,在价格极差、最大日收益率、换手率三者的共同作用下,特质波动率与股票预期收益之间的负向关系不再显著。由此,对某些特殊股票的投资偏好可能是产生“特质波动率之谜”的主要原因。     

复杂环境影响下雷达探测范围三维可视化

提出了一种复杂环境影响下的雷达探测范围三维可视化方法。该方法以雷达方程为基础,主要考虑地形和电磁干扰影响下的雷达探测范围三维可视化。首先利用均匀采样法建立自由空间中的雷达探测范围模型,然后在获取数字地形高程的前提下,基于光的直线传播原理提出一种雷达探测范围受地形影响的算法,并实现了地形影响下的雷达探测范围三维可视化;以干扰方程为基础,实现了多干扰源情况下雷达探测范围三维可视化。利用基于视点的雷达模型简化方法,有效地提高了绘制速度。实验结果表明,该方法不仅效率高,而且能真实直观地展现雷达探测范围。     

Normative Life Satisfaction in Chinese Societies

Research over several decades about subjective life satisfaction has led to the conclusion that the majority of people seem to be satisfied with their lives when their social and physical needs are met. In empirical studies which have used self-report instruments, this trend is reflected in respondents’ consistent preference for the positive end of scales. This led to the suggestion that there is a normative range for life satisfaction, which should hold true for general population data and, therefore, serve as a reference point, or a gold standard, for comparison (Cummins Social Indicators Research, 35, 179–200, 1995, Social Indicators Research, 43, 307–334, 1998). Subsequent research has shown that Western and non-Western samples generally conform to the normative range, but more data are needed from Chinese societies. In an attempt to remedy this situation, this paper investigates normative life satisfaction there. This paper reanalyses published and unpublished data from various Chinese societies (People’s Republic of China, Hong Kong, Macau, Singapore, and Taiwan) in order to confirm whether or not they lie within the normative range for non-Western countries. The results provide support for the relevance of Cummins’s normative range in Chinese societies. That the normative range generalised to the present study is a very useful finding, as it supports its utility for Chinese samples, and adds support to a theoretical explanation – i.e. the Wellbeing Homeostatisis theory—in Chinese groups.     

基于CFD的离心泵结构参数优化

为获得离心泵的最佳结构参数，根据给定的离心泵设计参数确定离心泵的结构形式和性能评价指标，计算离心泵各结构参数，利用CFD对离心泵进行流场数值模拟分析，设计了叶轮结构L16（45）正交实验表，选择叶轮进口安装角βb1、出口安装角βb2、包角φ、进口直径D1、出口直径D2为正交实验的5个因素，完成了正交实验并对实验结果进行极差分析，得到各结构参数对各优化方向评价指标影响排序及其影响情况，构造出效率最大、汽蚀余量最小条件下的目标函数及统一目标函数，并运用遗传算法对离心泵效率和汽蚀进行多目标优化，得到离心泵的最佳结构组合参数.     

盈余管理的新策略:来自母子公司交易的经验证据

现有关于盈余管理的研究仅限定在合并公司层面,鲜有关注母子公司之间可能存在的盈余管理行为.以我国2007—2017年A股上市公司为样本,理论分析并实证检验了上市公司总体上是否存在母子公司之间的盈余管理行为.研究发现:母公司会通过转移非全资子公司少数股东损益的形式对归属于母公司所有者的净利润进行盈余管理;当上市公司避免业绩亏损或下滑、盈余达标和融资需求的动机越强时,母子公司之间的盈余管理程度越高;进一步地,母子公司间的盈余管理与真实盈余管理存在显著的替代效应,而并没有证据发现其与应计盈余管理存在替代或互补关系.研究结论表明,要格外关注盈余操纵的新形式,警惕更为隐蔽的母子公司之间的盈余管理行为.监管机构要增强对母子公司交易动机、过程及信息披露的监管,以更好地维护中小投资者的合法权益.     

Inventory management maximization based on sales forecast: case study

The major purpose of this paper is to present a concept for reliable planning of the sales of small firms, where the large number of product variants complicates the implementation of this kind of system considerably. First, a methodology is presented to set up sales forecasting so that it can be integrated into the inventory management process. This inventory management software interprets forecasting information and provides users with a decision support system to minimize stocks in stores while at the same time avoiding missed sales. It is best applied in company types requiring high precision inventories, notably those in the textile industry; a large range of patterns are produced with many small variations (colors, size, customizations, etc.) and these products have a limited lifetime. Inventory management is difficult due to the multitude of products to account for and the necessity to sell them quickly. The methodology is intended for inventory management at the end of the supply chain. In store, the number of references, their similarities and the necessity to minimize unsold stock greatly complicates the reordering and restocking process. These types of companies do not easily lend themselves to classic techniques of sales forecasting and require specialized methods to estimate their needs precisely.     

论开放系统条件下价值创造范围的拓展

马克思的劳动价值理论是一个开放系统 ,它随着历史条件的变化而不断拓展。科技进步条件下具体劳动形式的变化 ,虽然没有改变创造价值的劳动的本质性内容 ,但却引起商品生产概念的内涵和外延不断扩大 ,从而拓宽了创造价值的生产劳动的范围 ,使它由狭义的物质生产领域跨越到了广义的非物质生产领域 ,实现了劳动价值理论史上的一个非常重要的转折。     

青岛经济增长模型的理论与实证

根据需求导向理论,应用计量经济方法,建立了青岛经济增长模型,并用岭回归的方法对模型进行了修正。对模型经济含义进行了分析与解释。