商品房成交量下降的供求原因

通过运用需求供给模型，揭示商品房需求的变化是导致2007年下半年到2008年下半年商品房成交量大量下降的原因。商品房需求应分为潜在需求和有效需求。潜在需求决定商品房市场的大小，有效需求决定商品房均衡价格。在这个模型中，商品房价格是一个内生变量，外部因素通过影响潜在需求与有效需求之间的转换，从而改变商品房价格。在保持供给不变的情况下，潜在需求转化为有效需求，成交量增加；有效需求转化为潜在需求，成交量减少。     

国外城市住房价格动态性研究综述

国外对住房价格动态性的研究分为四个方面:住房市场有效性的实证检验、宏观经济基本面指标的动态影响实证检验、住房价格泡沫的实证检验和住房价格指数的定价模型研究。本文对上述问题进行了文献综述,并进行相应的评价。     

经营性房屋租赁承祖人权益研究——以承租人权益的特殊保护为重心

经营性房屋租凭是房屋租赁的一种特殊类型，与居住性房屋租赁存在诸多区别，而我国有关于房屋租赁的法律主要立足于后者采取一体立法的模式，忽略了经营性房屋租赁的特殊性。一般租赁基本规则难以完全适用于经营性房屋租赁．导致了经营性房屋租赁承租人权益处于保护不利的局面，因此有必要在租赁用途、租赁权续展、租赁权转让方面给予特殊规制。     

动物对温度适应的分子生物学研究进展

动物对环境温度的适应,会使自身的细胞内转录和表达模式发成变化,以适合环境的变化,此时它会出现新的基因开放和新蛋白因子的合成,这总的来说是动物对自身的一种保护方式。本文从基因水平、蛋白质水平、细胞膜水平等三个方面综述了动物对环境温度适应的研究概况,并讨论了动物对环境温度适应的分子生物学机制以及在进化中的意义。     

从高房价生成机理谈我国房地产市场维稳的对策

抑制目前的高房价应该掌握高房价的形成机理。文章从地方政府的激励与约束因素、日益膨胀的投资需求以及国家实行充分自由的房地产市场政策等方面阐述了高房价的生成机理,力图对症下药地提出我国房地产市场维稳的对策,以求为我国的民生事业做出一点微薄的贡献。     

Proximity and animal welfare in the context of tourist interactions with habituated dolphins

The long-term sustainability of wildlife tourism depends on integrating visitor demands with resource management, requiring an understanding of tourist motivation. Managing the conflict between access to the animals and welfare, however, may diminish the experience for tourists. This paper identifies trade-offs tourists are willing to make between access and animal welfare, associated with feeding habituated bottlenose dolphins (Tursiops sp.) in Monkey Mia, Western Australia. Using a choice modelling technique, we were able to determine monetary values of visitor experiences. Compared to the current guaranteed interaction with dolphins (and a daily resort entrance fee), respondents were willing to pay significantly higher hypothetical entrance fees to avoid a decrease in proximity to, or probability of, the dolphin interaction. However, negative impacts on dolphin welfare had a negative impact on visitor utility. Over 80% of visitors (n = 244) accepted management regulations resulting in decreased time with and proximity to dolphins, if those addressed welfare concerns and were communicated clearly. Thus, while visitors placed the greatest value on the proximity and predictability, they were willing to trade off these aspects if they improved dolphin welfare. We provide management suggestions based on these results.     

广西基层国土资源管理所的现实困境与出路

广西基层国土资源所的发展存在机构设置、人员编制、经费、人员素质等诸多问题,提出解决这些问题的建议。     

Pig pandemic: Industrial hog farming in eastern Mexico

Industrial hog farming is an increasingly important land use in Mexico. Despite the known public health and environmental risks associated with this factory-style model of production, hog concentrated animal feeding operations (CAFOs) remain unregulated. Legal standards regarding the establishment and operation of swine CAFOs are lacking at municipal, regional, and federal levels. There are currently no restrictions on the size, concentration, or geographic location of operations, and public notice to surrounding and downstream communities is generally not required. These lax environmental standards facilitate swine CAFO expansion in regions such as the Perote Valley, with potential for negative long-term impacts on public health, community well-being, water resources, ecosystems, and climate.     

四川地区村镇住宅的节能经济性思考

针对四川地区灾后重建的契机,以及四川省节能住宅建设的相关政策规定,探讨在生态节能住宅修建前期,要注重节能住宅成本效益分析,保证节能住宅价值实现途径中的价值链条通畅,以及从传统民居中吸取节能住宅规划、构造、材料等方面的宝贵经验,因地制宜,防止伪生态住宅的产生,保证四川地区村镇住宅的节能经济性。