Valuing vegetation in an urban watershed

This study uses the hedonic price method to examine if land cover types-trees, shrubs, water and impervious surface areas-affect the sale price of single-family residential properties in Multnomah County, Oregon. We combine detailed structural and location information for 36,753 single-family residential property sales with the percentage of land cover on each property and within three buffers surrounding each property. Trees contribute positively to a property's sale price, but the estimated increase may be less than the costs of planting and caring for trees. Benefits received by nearby property owners may justify actions by government agencies to expand canopy coverage.     

消费者对HACCP认证食用油的支付意愿及其影响因素研究——以天津市消费者为例

本文研究了消费者是否愿意为通过HACCP认证的食用油支付额外价格及影响支付意愿的因素。通过问卷调查,采用Logistic回归模型分析最终得出了消费者的支付意愿及关键影响因素。     

Modeling managerial behavior in real options valuation for project-based environments

Project valuation, as a decision-making tool for initiating investments in projects, should be able to value project flexibilities and incorporate reasonable risk preferences of relevant decision makers. Real options valuation methods are the available approaches for valuing project flexibilities, whereas they have shortcomings in considering managers’ reasonable risk preferences in project decisions. Therefore, researchers have suggested approximating the perspective on risk of real options methods and practitioners in project management. This study proposes a fair real options valuation for project-based environments by a behavioral economic approach, which adopts binomial lattice method, Monte-Carlo simulation, and cumulative prospect theory. The results show that behavioral factors such as ‘risk attitude’ and ‘loss aversion’ should be accepted in project investment decisions while limited to an acceptable amount depending on the project conditions (e.g. uniqueness of decision-making scenarios). This research contributes to the project management domain by enhancing project investment decisions that include project flexibilities.     

工程实施阶段的风险规避——解读2013版《建设工程工程量清单计价规范》之合同价款调整

分析工程实施阶段影响合同价款调整的风险因素及风险分担的有关规定和风险出现时合同价款调整的计算方法。条理清晰,示例通俗易懂,可操作性强。     

The public's value of hydrogen fuel cell buses: A contingent valuation study

With the increasing interest in global warming, there has been intense international competition with regard to the introduction of the hydrogen (H₂) fuel cell (FC) bus, which represents a promising solution for the low-carbon age. With respect to the investment in H₂-based technology development and the expansion of H₂ FC vehicles, the consumer attitude is a crucial factor because the Korean government will consider it one of the most important factors in its decision to approve a large-scale introduction of H₂ FC buses. In this regard, this study measures the public's willingness to pay (WTP) for a large-scale introduction of H₂ FC buses in Korea by employing a survey approach termed the contingent valuation. Furthermore, to enhance statistical efficiency, this study employs the one-and-one-half-bound dichotomous choice method. The annual mean WTP estimate was KRW 4230 (USD 4.55) per household as of 2007. The estimate of the annual benefits to the affected residents was KRW 32.3 billion (USD 34.7 million). The results of this study are expected to be helpful in policy decisions related to the introduction of H₂ FC buses and investment in H₂ technology development.     

Environmental degradation costs in electricity generation: The case of the Brazilian electrical matrix

The main purpose of this paper is to emphasize the importance of including environmental degradation costs in the long-term planning of the Brazilian electricity sector. To this aim, environmental external costs associated to both hydro-power and thermal-power electricity generation are investigated. Monetary valuation methodologies are applied and environmental degradation costs, expressed in per kWh of generated energy, are obtained for the main types of generation sources of the Brazilian electricity matrix. Both local pollution due to particulate matter emissions and global warming effects are assessed. A classification of the sources from the point of view of their impact on the environment is given. Degradation costs associated to the installed capacity expansion in the Brazilian electricity sector during the time horizon 2007–2016 are estimated. These resulting costs represent lower boundary damage estimates associated only with the energy to be generated during the period. Results indicate that local pollution caused by a small number of plants could be even more costly to society than global warming and, also, show the importance of considering not only unitary damage costs but the participation of each source on the generated energy during the time horizon, as a guide to planning and policy making.     

日照作用平面二维温度场计算研究

通过“室外综合温度“方法,计算出结构正晒面的温度峰值和背晒面温度值,并由建筑物的使用性质,查出其室内温度.将这些作为二维导热微分方程的边界条件,并通过差分法和有限元法分别对该微分方程进行求解,得出各节点温度值,为后阶段温度应力分析作准备.     

基于国有企业改制的无形资产管理

针对国有企业改制的现状,讨论了国有企业对无形资产认识不足、管理意识淡薄和改制中国有资产流失严重的问题.提出了国有企业无形资产管理的对策.认为:科学、公正、公允地对国有企业无形资产进行评估、加强企业无形资产的核算管理,有利于发挥国有企业无形资产的增值效用和企业竞争力的提高.     

工程量清单计价模式中不平衡报价模型研究

根据工程量清单合同条件下的固定单价的特点，以及不平衡报价的基本原理和使用条件，建立了以超额利润最大化为目标函数的线性规划模型，并配以具体的工程实例通过单纯形法求得不平衡报价的最优解。     

工程量清单计价在冶金项目建设中的应用与思考

论述了传统的计价模式与工程量清单计价在计价性质、形成方式、招投标形式的区别，并根据冶金项目特点阐述了冶金项目分部分项工程量清单、措施项目清单及其它项目清单的编制应用，并结合实际工作提出在工程量清单计价中应注意的问题和解决方法。