“项目驱动”教学法在“数据库原理与应用”中的应用

本文针对软件技术专业"数据库原理"教学过程中存在的一些问题,提出了"项目驱动"教学法,并以"项目驱动"为原则给出了相应的教学任务。     

我国上市公司股权融资偏好分析

我国上市公司表现出强烈的股权融资偏好,其形成的直接动因是股权融资成本对风险收益对等原则的背离,而深层动因则在于制度和政策性缺陷导致。对股权融资偏好带来的负面影响,必须采取措施进行规范、治理。     

The Potential of Interdisciplinarity for Leisure Research

Abstract

Knowledge about preferences for campsite attributes is needed so that management strategies can be guided by users’ preferences for settings and experiences. However, results of campsite choice studies have shown great variability across settings. Reexamination of this research shows a hierarchical typology of attributes: most important are necessity attributes, which supply basic camping needs, followed by experience attributes, which enhance preferred experience outcomes, and finally amenity attributes, which are relatively minor but can improve site quality. A survey of Whitewater boaters confirmed the predicted order of attribute importance and generally supported the proposed definitions of attribute types. A tentative model of campsite choice is offered in which sites are evaluated first for their ability to provide necessity attributes, then experience attributes, and finally, if more than one potential site remains, amenity attributes. Constraints may cut the evaluation process short anytime after the initial (necessity attribute) stage.     

Enhancing the study abroad experience: A longitudinal analysis of hospitality-oriented,study abroad program evaluations

Research suggests numerous benefits associated with studying abroad. Given the increasingly global nature of the world, it would seem that there is a significant need for international exposure; however, only 1.4% of U.S. students have studied abroad. This study examined program evaluations from 11 short-term undergraduate study abroad programs encompassing a span of 9 years. A total of 185 participants completed the survey using evaluations designed for program improvement, which were collected at the conclusion of each experience. Data were examined using a mixed-methods approach with the goal of identifying programmatic characteristics that contributed to increased student satisfaction. Results indicated that students' preferences were prioritized in terms of logistics, culture, and pleasure. In addition, the engagement and source of experience significantly influenced students' satisfaction with their study abroad experience, implying that students prefer programs with active components and local guides. Findings were examined in light of Mezirow's Transformative Learning Theory.     

对保户的税收优惠政策分析及借鉴

通过对保户实施税收优惠政策，可以刺激保险需求的增长。可以刺激保险需求的增长。从而有效地促进保险潜在需求向现实需求的转化。本文通过对一些国家和地区政策的介绍。提出了完善我国此项政策和促进保险需求的策略。     

Minimum option prices under decreasing absolute risk aversion

We establish bounds on option prices in an economy where the representative investor has an unknown utility function that is constrained to belong to the family of nonincreasing absolute risk averse functions. For any distribution of terminal consumption, we identify a procedure that establishes the lower bound of option prices. We prove that the lower bound derives from a particular negative exponential utility function. We also identify lower bounds of option prices in a decreasing relative risk averse economy. For this case, we find that the lower bound is determined by a power utility function. Similar to other recent findings, for the latter case, we confirm that under lognormality of consumption, the Black Scholes price is a lower bound. The main advantage of our bounding methodology is that it can be applied to any arbitrary marginal distribution for consumption. This revised version was published online in June 2006 with corrections to the Cover Date.     

Did households’ time preference change due to the Great Recession?

Household time preference for US households, as measured by the planning horizon, was fairly stable for many years, but sharply changed with the onset of the Great Recession. Based on an analysis of a combination of the 1992–2013 Survey of Consumer Finances (SCF) datasets, time preference increased in 2010 and remained high in 2013, indicating households were less patient after the onset of the recession. This pattern held up even after controlling for household characteristics.     

Farmers’ risk preferences and their climate change adaptation strategies in the Yongqiao District,China

Farmers’ risk preferences play an important role in agricultural production decisions. This study characterizes risk preferences among farmers in Yongqiao and determines how these risk preferences are related to their choices regarding climate change adaptation strategies. We find that most farmers in the study area were aware of climate change. They were taking measures to protect their livelihoods against perceived changes to the local climate. The risk experiment result shows that the representative subject was risk averse, and women were more risk averse than men. The relationships between farmers’ risk preferences and different climate change adaptation choices were different. Farmers’ risk aversion was negatively and significantly related with adaptation strategies on planting new crop varieties and adopting new technology, but it had a significantly positive effect on purchasing weather index crop insurance. The results also indicate that the level of education, farming experience, farm size, household income and perception of climate change impacts influence farmers’ adaptation decisions.     

人工智能发展对通胀动态的影响及政策挑战——基于动态随机一般均衡模型的分析

人工智能的发展是生产力进步的表现,但广泛使用人工智能技术的经济效应尚待深入研究。基于人工智能对劳动的替代作用,将人工智能投资引入动态随机一般均衡模型,通过比较静态分析和短期动态分析考察人工智能发展对通胀动态的影响。稳态分析表明：人工智能投资效率提高和使用范围扩大均会提升劳动生产率进而提高产出水平,但对长期或趋势通胀没有影响;在人工智能发展初级阶段人工智能的发展会引起实际工资下降,而在相对高级阶段人工智能的发展会引起实际工资上升。短期动态分析显示：人工智能发展水平的提高,无论是投资效率的提高还是使用范围的扩大,都会导致通胀及实际边际成本对偏好冲击和技术冲击等外生冲击的反应变弱。人工智能的发展会使通胀动态与实际经济活动变化间的联系减弱,其原因是人工智能对劳动的替代作用使工资调整不再是应对外生冲击的必然选择,进而改变了外生冲击通过影响工资来影响通胀的传导机制。因此,发展人工智能在促进生产率提升和产出增长的同时,还会改变宏观经济变量间的传导机制,进而对通胀等政策调控目标变量的准确预测以及政策调整和实施的有效性带来新的挑战,也为金融理论研究提出新的课题。     

煤矿在用架空乘人装置不安全因素解析

文章从实际应用情况出发,总结了目前国内中小型煤矿企业使用的架空乘人装置存在的不安全因素和消除不安全因素的方法。从根本上解决架空乘人装置的不安全因素,从而确保架空乘人装置安全高效的运行。