贵阳市出租车服务质量评估研究

《交通强国建设纲要》提出,"到2035年基本建成交通强国。现代化综合交通体系基本形成,人民满意度明显提高。"出租车作为基础交通工具,在城市综合交通体系中具着极其重要的地位。它是城市文明流动的名片,其服务质量好坏直接影响城市形象和人民满意度。     

基于自适应搜索的绝对矩块截断编码的图像压缩

针对现有的固定大小的绝对矩块截断后图像质量不高的问题，提出了基于自适应搜索的压缩算法。首先根据中值确定范围搜索出图像中心阈值，使得图像中心阈值最能代表图像基本内容；然后根据图像中心阈值分段搜索出上下中心，这样在图像块中所有像素与上下中心距离偏差之和最小。该算法确定的上下中心与理想的上下中心一致，与绝对矩块截断编码（Absolute Moment Block Truncation Coding，AMBTC）算法的峰值信噪比最佳值相同，同时耗时较少，可以做到实时处理。仿真结果表明，提出的自适应搜索算法能够较好地提升图像的质量，同时复杂度较低。     

CARE/CEASA Roundtable on: Liquidity and Capital Management

Five distinguished banking and accounting scholars explore the role of liquidity at not only the “macro” level of the economy, but also at the level of individual companies. The first of the four main speakers, who is the author of the preceding article, restates his argument that the stability of financial systems can be increased by directing bank regulators and executives to find the optimal combination of liquidity and capital requirements. The second of the four speakers shifts the focus to liquidity management by non‐financial companies, with particular emphasis on their use of lines of credit and their role in helping companies weather the financial crisis. The third speaker places liquidity in the context of capital markets, and presents suggestive evidence that improvements in corporate disclosure and transparency have beneficial effects on both the level and volatility of liquidity in those markets. The panel is rounded out by a discussion of liquidity in corporate bond markets and the proposal of a new way to measure such liquidity.     

Linking agricultural policies with obesity and noncommunicable diseases: A new perspective for a globalising world

In light of the shift in policy paradigm in agriculture from state intervention to market liberalisation and globalisation, this paper develops a series of hypotheses on the relationship between agricultural policies and consumer diets. The first hypothesis is that the paradigm shift has led to greater specialisation of production, so changing the ability and incentive for producers to supply certain foods relative to others. Second, the shift has affected farmgate prices (both up and down), so creating opportunities for the industries which purchase farm commodities (the food consuming industries – FCIs) to substitute lower priced ingredients, thereby influencing the nutritional quality and content of foods available in the marketplace. Third, it has increased the ability of the FCIs to “add value” through product innovation and marketing, creating a market characterised by highly differentiated products targeted to individualised preferences, thus increasing the acceptability of a wider variety and quantity of food products.     

中压母线装没电弧光保护的必要性

文章分析了中压母线装设电弧光保护的必要性,并结合VAMP220弧光保护装置叙述了电弧光保护在中压母线保护中的具体应用.     

纳税对企业偿债能力的影响分析

偿债能力是企业经营发展得以持续稳定的保障,因此,企业以及企业的利益相关者对企业偿债能力都非常关注。本文在分析企业的偿债能力及指标的基础上,阐述了纳税对企业偿债能力的影响,并提出了企业要进行税收筹划,以此增强企业的偿债能力。     

有外保温窗间墙采用轻质条板封堵的优越性

预制轻质条板具有质量轻、强度高,安装方便及节能环保等特点,被广泛用于建筑隔墙工程。安装后的条板牢固、垂直平整、无裂缝,方便外保温施工,可以满足抗震和使用功能要求。本文就预制轻质条板在上下层飘窗板窗间墙封堵中比常规加气块砌筑的优越性进行阐述,为以后类似工程提供依据和借鉴。     

Can common risk factors explain infrastructure equity returns? Evidence from European capital markets

This is the first paper to test the ability of conventional asset pricing models to explain the excess returns of European infrastructure stocks. Specifically, we firstly run the well-known Fama and French three-factor model, including three common stock market factors (market risk, size risk and value risk), and subsequently augment the model with two common bond risk factors (term and default risk), as infrastructure firms should be closely related to bond markets. The times-series regressions span the period from July 1992 to June 2014 and are conducted using an individually created infrastructure equity data-set. With the help of an intensive screening process, we only include those infrastructure stocks that in fact own and/or operate physical infrastructure. The results reveal that the three-factor model is unable to capture most of the variation in infrastructure returns. Therefore, bond risk factors should be included in asset pricing models in order increase the goodness of fit, as infrastructure stocks prove to be sensitive to interest rate changes. Nevertheless, even the augmented asset pricing model leaves a substantial part of the variance unexplained, thus indicating that infrastructure firms exhibit a high level of idiosyncratic risk. In addition, the results suggest that there may be further risk factors which should be investigated in future studies.     

Why is an elite undergraduate education valuable? Evidence from Israel

In this paper we compare the labor market performance of Israeli students who graduated from one of the leading universities, Hebrew University (HU), with those who graduated from a professional undergraduate college, College of Management Academic Studies (COMAS). Our results support a model in which employers have good information about the quality of HU graduates and pay them according to their ability, but in which the market has relatively little information about COMAS graduates. Hence, high-skill COMAS graduates are initially treated as if they were the average COMAS graduate, who is weaker than a HU graduate, and consequently earn less than HU graduates. However, over time the market differentiates among them so that after several years of experience, COMAS and HU graduates with similar entry scores have similar earnings. Our results are therefore consistent with the view that employers use education information to screen workers but that the market acquires information fairly rapidly.