基于GIS技术的基本农田划定研究  ———以重庆市黔江区金溪镇为例

基本农田的划定是土地利用总体规划中一个极其重要的环节,将高质量的耕地划入基本农田,是土地利用规划的基本要求。作者结合编制重庆市黔江区金溪镇土地利用总体规划实践,运用GIS技术和相关评价体系,通过对耕地图斑的"评分"、"排序",对土地利用总体规划中基本农田的划定方法进行探讨和研究,并依据得出的决策模型划定金溪镇基本农田保护面积共1 586.59hm2,在数量和质量上均已达到上级规划下达的指标,为促使土地利用规划工作更加高效和深入的展开做好基础工作,也为西南丘陵山区土地利用总体规划中基本农田的划定提供参考和借鉴。     

螺栓设计的假想危险截面面积法

本文介绍了一种设计普通螺栓直径的简便方法。并运用数值分析方法对大量数据进行电算,制作成表,供人工手算时使用。     

低碳经济发展中的碳排放驱动因素实证研究——以浙江省为例

本文基于三大产业和居民生活部门的12种能源消费量数据,较全面地测算了1995—2008年浙江省碳排放量,建立了碳排放驱动因素分解模型,将碳排放的驱动因素分解为能源强度、结构调整、经济发展和人口规模等四大类效应,并采用对数平均权重分解法(LMDI)测算了各类效应对碳排放量的贡献值、变化趋势及相互作用机理。研究结果表明,1995—2008年,浙江省碳排放量呈现不断上升的趋势;经济发展和人口规模对碳排放的正向驱动效应远超过能源强度和结构调整产生的负向驱动效应。本文同时测算出浙江已跨越了碳排放强度的高峰阶段,但仍处于碳排放强度高峰迈向人均碳排放量高峰的阶段。为缩短不同碳排放高峰的跨越时间,降低高峰峰值,本文提出了加快低碳经济发展的相关政策建议。     

生态工业园规划建设的理论与方法初探

随着全球保护环境、实现可持续发展的呼声日益高涨,出现了一种新型的工业组织形态——生态工业园区,它通过一个区域内物流和能源的正确设计模拟自然生态系统,形成企业间共生网络,达到减少废物,实现园区污染“零排放”的目标,从而成为各国可持续发展的主要模式之一。目前,许多国家都在进行生态工业园区的建设和研究,文章主要就生态工业园建设的理论基础和研究方法作初步的探讨,并提出建设的评价指标体系。     

申遗背景下的中国自然遗产潜力评估

参照世界自然遗产地学、美学、生物生态过程和濒危物种栖息地4项申遗评选标准,依据地貌景观、生物景观等价值构成,建立美学价值评估方法;依据世界遗产13类地学主题评价框架、地质演化过程、典型类型地貌等价值构成,建立地学价值评估方法;依据生态系统过程、物种多样性、栖息地等价值构成,建立生物生态学价值评估方法。利用全球对比的方法提取和评估突出普遍价值,将中国自然遗产潜力区分为青藏高原区、西北干旱区、东部季风区等生态环境基本单元,筛选我国世界自然遗产潜力区。重点提出海洋类世界自然遗产和西部北部地区申遗的可能性,提出中国申报世界自然遗产突出普遍价值的评估策略与优先原则。     

Estimating gravity equation models in the presence of sample selection and heteroscedasticity

Gravity models are widely used to explain patterns of trade. However, two stylized features of trade data, sample selection and heteroscedasticity challenge the estimation of gravity models. We propose a two-step method of moments (TS-MM) estimator that deals with both issues. The Monte-Carlo experiments show that the TS-MM estimates are resistant to various combinations of sample selection and heteroscedasticity. Moreover, the TS-MM estimator performs reasonably well even when the data generating process deviates from the TS-MM assumptions. We revisit the world trade in 1990 to illustrate the usefulness of the proposed model, with emphasis on the identification of the extensive margin of trade.     

基于可拓工程方法的装备管理人员队伍建设评估

基于对装备管理人员队伍建设的重要性的认识。在建立了装备管理人员队伍建设评价指标体系的基础上,提出了利用可拓工程方法对装备管理人员队伍建设进行综合评价的方法,并深入探讨了该方法的应用程序及实施步骤,建立了装备管理人员队伍建设的可拓评估模型,最后用实例验证了模型的有效性。     

Masculinity,Testosterone, and Financial Misreporting

We examine the relation between a measure of male CEOs’ facial masculinity and financial misreporting. Facial masculinity is associated with a complex of masculine behaviors (including aggression, egocentrism, riskseeking, and maintenance of social status) in males. One possible mechanism for this relation is that the hormone testosterone influences both behavior and the development of the face shape. We document a positive association between CEO facial masculinity and various misreporting proxies in a broad sample of S&P1500 firms during 1996–2010. We complement this evidence by documenting that a CEO's facial masculinity predicts his firm's likelihood of being subject to an SEC enforcement action. We also show that an executive's facial masculinity is associated with the likelihood of the SEC naming him as a perpetrator. We find that facial masculinity is not a measure of overconfidence. Finally, we demonstrate that facial masculinity also predicts the incidence of insider trading and option backdating.     

Hedge Fund Regulation and Misreported Returns

This paper introduces a cross‐country law and finance analysis of the misreporting behaviour in the hedge fund industry in terms of smoothing returns so that a fund consistently generates positive returns. We find strong evidence that international differences in hedge fund regulation are significantly associated with the propensity of fund managers to misreport monthly returns. We find a positive association between wrappers and misreporting, particularly for funds that do not have a lockup provision. Also, we find some evidence that misreporting is less common among funds in jurisdictions with minimum capitalisation requirements and restrictions on the location of key service providers. We assess the robustness of our finds to a number of specifications, including, different specifications of misreporting bin widths, subsets of the data by fund type, as well as specifications controlling for collinearity and selection effects and other robustness checks. We show misreporting significantly affects capital allocation, and calculate the wealth transfer effects of misreporting and relate this wealth transfer to differences in hedge fund regulation.     

基于多级模糊层次综合评价法的资源承载力研究

本文采用多级模糊层次综合评价法和聚类分析方法对全国30个省市区(不包括西藏、台湾、香港、澳门,下同)的资源承载能力进行了分析,对新疆资源承载力模糊综合评价结果和聚类分析结果进行了综合评价,指出了我国各省市区资源承载力的水平状态以及所处的位次和层次,探讨了各省市区资源承载力区际差异的主要原因。研究结果表明,各省市区间的资源承载力差别很大,东部经济发达的各省市资源承载力较高,显示出经济发展对资源承载力提升的互补性明显,西部经济落后的各省市区资源承载力较差,显示出其对自然资源承载力依赖度较高。