生态旅游地发展的模型研究

这篇文章运用生态-经济的理论,利用系统动力学的方法,将生态旅游的一些零散论述加以系统化,并通过建立生态旅游的结构模型,探讨生态旅游发展中生态、社会和经济系统之间的结构和行为关系.生态旅游发展的模型涉及了物质资源、文化资源、基础设施、工作市场、游客和财务促销等6个部分,模型的模拟功能有助于理解旅游发展的复杂结构.模型得到验证后,可以成为评价旅游发展政策的工具.     

双平行线阵的快速一维DOA估计

针对传统子空间算法需要进行特征值分解或奇异值分解等复杂计算的问题,提出一种双平行线阵（Double Parallel Linear Array,DPLA）的快速一维波达方向（Direction of Arrival,DOA）估计算法。算法通过处理互协方差矩阵的第一列元素构造出等效的噪声子空间,再通过求根MUSIC（Multiple Signal Classification）算法得到DOA估计,有效避开了特征值分解或奇异值分解,降低了计算复杂度,提高了运算速度。仿真结果表明,该算法在提高了估计精度的同时减少了估计时间。     

中国房地产泡沫与非泡沫--以投机理论为基础的实证分析

文章在对当前房地产泡沫若干观点作简单综述和对房地产泡沫定义辨析的基础上,建立了房地产投机泡沫检验模型,并对中国房地产业泡沫性与非泡沫性进行了实证研究,最后得出当前中国房地产业不存在投机泡沫的结论。     

The effectiveness of fear appeals in ‘green’ advertising: An analysis of creative,consumer, and source variables*

This study focused on the effectiveness of fear appeal messages used to arouse a threat in green advertising. An experiment recruited 175 participants to test the influence of the advertising appeal (fear vs. non-fear appeal), source (for-profit vs. non-profit organizations), and involvement with the environment on attitude toward the ad (A_ad), attitude toward the product (A_p) and purchase intention (PI). Results revealed that a fear appeal in a green ad negatively affected A_ad and A_p and that participants who were highly involved with the environment were more likely to have positive attitudes toward the green ad and advertised green product as well as a stronger intent to purchase it. The source type in the green ad did not affect ad effectiveness and involvement with the environment did not moderate the effects of either appeal or source.     

The impact of earnings expectations on corporate downsizing

Research Summary: We propose that due to financial market pressures, managers are forward‐looking in their search and decision processes and focus on meeting performance targets set by the financial community. Using panel data on S&P 100 companies, we find that pressure felt by management to meet the analyst consensus earnings estimate influences the extent of corporate downsizing. Moreover, our results show that high levels of institutional investor stock ownership and CEO power attenuate managers’ sensitivity to financial market pressures, while high levels of analyst coverage increase their sensitivity. Managerial Summary: In this study we examine how financial market pressures influence managers’ downsizing decisions. We argue that investment analysts’ earnings estimates represent important performance targets to which managers aspire. If firms fail to meet analysts’ expectations, the stock price will suffer. This study shows that managers utilize corporate downsizing to address the potential shortfall between a firm's future performance and the analyst consensus earnings estimate. In addition, we find that managers’ concerns over meeting analysts’ earnings estimates are influenced by various contextual factors such as institutional investor stock ownership, CEO power, and high levels of analyst coverage.     

Driven by aspirations,but in what direction? Performance shortfalls,slack resources,and resource‐consuming vs. resource‐freeing organizational change

Research summary : Prior literature drawing on the behavioral theory of the firm has not considered how resource constraints impact the direction of organizational change in response to performance shortfalls relative to aspirations. We argue that decreasing financial resources resulting from substantial performance shortfalls and the absence or availability of slack resources together affect the emphasis on different types of organizational change in response to performance shortfalls. Using data on the acquisition and divestment behavior of 530 companies in the information and communications technology sector from 1992 to 2014, we find that the frequency of resource‐consuming acquisitions and of resource‐freeing divestments are affected differently by performance below aspirations and that these relationships are moderated by the level of financial slack. Managerial summary : This paper examines whether firms respond to performance shortfalls with acquisitions or divestments. We argue and show that the closer the firm is to the aspired level of performance, the more likely it is to respond with resource‐consuming acquisitions to close the performance gap, whereas the further it is from aspired performance, the more likely the firm is to respond with divestments to free resources. Financial slack weakens these relationships between performance relative to aspirations and acquisitions or divestments such that it increases the likelihood of a response through acquisitions while it reduces the likelihood of a response through divestments. Copyright © 2016 John Wiley & Sons, Ltd.     

经营绩效反馈、环境不确定性与企业广告投入

基于2012～2015年深沪两市A股上市公司样本数据,对经营绩效反馈和企业广告投入之间的关系进行了理论分析和实证检验,并进一步考察了环境不确定性的调节作用。研究结果表明：（1）当企业未实现资本市场经营预期时,随着实际绩效低于经营预期程度的增大,企业广告投入将减少;（2）当企业实现资本市场经营预期时,随着实际绩效高于经营预期程度的增大,企业广告投入将增加;（3）当企业未实现资本市场经营预期时,与低不确定性环境相比,高不确定性环境中企业经营绩效负反馈对广告投入的负向影响将增强;（4）当企业实现资本市场经营预期时,与低不确定性环境相比,高不确定性环境中企经营绩效正反馈对企业广告投入的正向影响将增强。     

三级生物质供应链的奖惩与回馈契约协调研究

为了优化生物质能供应链,降低成本,在无扰动因素情况,需求不确定且与价格有关的条件下,研究了由能源公司、基地和农户组成的三级生物质供应链中,奖惩与回馈契约对供应链的协调问题,建立了满足渠道协调的条件和供应链内各级参与者实现互赢的数学模型,最后将其用于数值算例中验证。结果证明契约参数的合理选择可以实现供应链各方利益最大。     

Polite feedback signals in same-gender conversation-An investigation into the theory of politeness impact on the male speakers and female speakers use feedback signals in the same-gender conversation

交流是每天日常生活中分享知识和经验所必不可少的一部分。对话作为交流手段的一种主要形式,是一种即时即地发生的社会活动。反馈语是交互子系统中的(即对话过程中的)一种特定用语,主要表现为使用特定或固定的语言学词汇来引出上下文或是帮助理解或是暗示说话人态度等等。男性和女性参与者在会话过程中使用不同的策略或是选择合适的反馈语表达他们的意见,想法,目的,态度等等进而展现他们的礼貌。     

DATUM面控制技术在包边机设计中的应用

在UG平台上进行汽车门盖类包边机设计时，运用DATUM面对各设计者的设计区域进行控制，可以有效地避免各工作者所设计出的主压机构或预压机构出现干涉，也能很好地保证各设计者所设计出的机构之间不出现间隙。文章通过对N300尾门包边机的设计进行分析，阐述了DATUM面控制技术在包边机设计中的运用。