数字图像融合综述

本文对数字图像融合的主要研究内容和方向做了一个简单综述,并介绍了几种典型的数字图像融合理论与方法。     

The relevance of information and trading costs in explaining momentum profits: Evidence from optioned and non-optioned stocks

Considerable evidence from many countries suggests momentum strategies generate profits. These have been difficult to rationalise and evidence on the sources of such profitability is inconclusive. We utilise a sample of optioned stocks, characterised by high liquidity, high market capitalisation and fewer short sales constraints and compare results with control samples of non optioned stocks chosen on the basis of market value, turnover and bid–ask spread. The sample characteristics, and the fact that derivatives improve the impounding of information into prices, enable us to draw conclusions about the causes of momentum profits. While we find that short sales constraints are not the major driver of profitability and that most momentum profits disappear using two transactions costs measures of the bid–ask spread, one not previously used, the persistence of some momentum profits indicates that the market underreacts even to the most publicly available information.     

硅谷巨头的王储之战

MarketWatch近日撰文称,一位关键先生从英特尔跳槽到了EMC,表面看来,这只是人才的流动,但是实际上,这却彰显了两家科技巨头正在采取的一致行动,达尔文主义的戏份正在那里上演,而这戏剧的结局将确定谁会登上他们各自的最高宝座。     

图像增强基本理论综述

图像增强是数字图像处理的最基本的方法之一,本文总结了图像增强的基本理论,并对新的图像增强的方法作了简单介绍。     

Can rewards induce corresponding forms of theft? Introducing the reward-theft parity effect

Rewards are reinforcement mechanisms that organizations use to shape desirable employee behaviors. However, rewards may also have unintended consequences, such as building expectations for receiving extra benefits and weakening employee barriers to unethical acts. This article investigates the dark side of the reward–behavior association, and exploring what is referred to as the reward–theft parity effect (RTPE). The authors hypothesize that receiving rewards induces a corresponding type of theft. In Study 1, survey results (n = 634) show initial support for the RTPE between rewards and same-category theft, and that perceptions of procedural justice attenuate this association. Study 2 involved a 2 (reward) × 2 (theft opportunity) between-subjects experimental design (n = 300) and provides further support for the RTPE by revealing greater theft under a reward–theft parity condition than under a reward–theft disparity condition. Study 3 replicates these findings in a field experiment (n = 285) and finds that the RTPE is exacerbated when the reward–behavior task is perceived as unjust. Collectively, these findings provide new theoretical insights while also giving managers a more complete understanding of the dark side of behavioral reinforcement mechanisms.