A Semiparametric Method for Valuing Residential Locations: Application to Automated Valuation

This paper is motivated by automated valuation systems, which would benefit from an ability to estimate spatial variation in location value. It develops theory for the local regression model (LRM), a semiparametric approach to estimating a location value surface. There are two parts to the LRM: (1) an ordinary least square (OLS) model to hold constant for interior square footage, land area, bathrooms, and other structural characteristics; and (2) a non-parametric smoother (local polynomial regression, LPR) which calculates location value as a function of latitude and longitude. Several methods are used to consistently estimate both parts of the model. The LRM was fit to geocoded hedonic sales data for six towns in the suburbs of Boston, MA. The estimates yield substantial, significant and plausible spatial patterns in location values. Using the LRM as an exploratory tool, local peaks and valleys in location value identified by the model are close to points identified by the tax assessor, and they are shown to add to the explanatory power of an OLS model. Out-of-sample MSE shows that the LRM with a first-degree polynomial (local linear smoothing) is somewhat better than polynomials of degree zero or degree two. Future applications might use degree zero (the well-known NW estimator) because this is available in popular commercial software. The optimized LRM reduces MSE from the OLS model by between 5 percent and 11 percent while adding information on statistically significant variations in location value.     

中国证券市场年报补丁公司特征研究

在上市公司午报披露之后，屡屡可见公司对年报的各类补充公告与更正公告（即年报补丁），年报朴丁不仅受到媒体的强烈抨击，也为监管部门所关注。本文选取发布2001～2003年年报补丁的公司作为研究样本，并分年度、行业、公司规模选取配对样本，考察补丁公司的经济特征，研究表明，相对配对样本而言，补丁公司的业绩较差，公目的总资产增长较快，较少设置审计委员会，且审计质量较差。     

上市公司会计稳健性的时序演进与行业特征研究

会计稳健性（accounting conservatism）是财务报告的一个重要特征和惯例。稳健原则的贯彻实施是我国会计改革与国际接轨的突出特征。为分析中国的会计稳健性在实证上的特征，本文采用中国上市公司1993～2003年的数据，运用basu（1997）模型，计算了上市公司分年度的会计稳健性以及行业特征。实证研究发现，随着中国会计制度的改革，证券市场监管和处罚力度的强化，注册会计师的脱钩改制，会计稳健性在1998年后逐渐增强，2001年以后上市公司的会计具有稳健性，会计稳健性具有行业特征，在制造业尤其明显。     

The Influences of Teacher Knowledge and Authentic Formative Assessment on Student Learning in Technology Education

Students involved in holistic technological practice need to develop an understanding of technological practice outside the classroom and to participate in tasks set as close as practicable to actual technological practice. This paper investigates the context of assessment and its relationship to achievement and the importance of teacher knowledge to student technological practice. I argue that ‘out of context’ assessment tasks do not give an accurate indication of achievement levels of the children assessed. Introduced is the Model of Student Technological Practice, which identifies four constraints that influence student technological practice. A significant factor is teacher knowledge, as it impacts greatly on the quality of feedback given to students by their teachers. Timely teacher intervention and formative assessment feedback will alter student technological practice and should improve the students’ likelihood of developing successful outcomes.     

统计技术在计量标准考核中的应用

阐述了计量标准考核的现状及存在问题，提出了在计量标准考核中运用数理统计技术的具体方法、步骤，即通过核查标准建立测量过程统计控制，进而实现实验室的运行控制。     

油气田开发项目平均投资利润率和利税率的确定

行业平均投资利润率和行业平均投资利税率是投资者进行投资机会选择的主要参考依据之一，是投资者对其投资项目收益的最低期望要求。从投资者角度来讲，恰当地确定平均投资利润率和行业平均投资利税率是一个相当重要而又比较棘手的问题。文章主要讨论了如何确定油气田勘探开发项目经济评价中平均投资利润率和行业平均投资利税率的一种简单方法。     

油气管道完整性评价的数据支持系统

开发了管道完整性评价的数据库系统，介绍了该软件系统的结构、模块、特点、主要功能和操作界面。     

石油储量价值评价中运销成本级差模型的设计与检验

对石油资源价值评价中的4个成本因素之一——运销成本级差因素进行了讨论。文中分析了运销成本级差因素的组成因子之后．建立对之进行测算的数学模型，并就两个油田的实测数据给出了计算结果。     

高职高专考试考核方式改革之探索

本文以宁夏工商职业技术学院机电工程系《典型电气控制设备的安装》考试考核方式改革为例,分析了传统的教学方法和教学内容已经不能适应人才培养的需要。怎样按职业教育的规律和特点培养出符合企业需要的人才是目前高职院校的头等大事,机电工程系经过多年的研究和实践,探索出了校企合作、工学结合的人才培养模式是在高等职业教育中一种非常有效的人才培养模式,而这种人才培养模式的实施,其关键在于教育教学的课程改革。由此引出了课程体系构建、教学内容选择、教材编写、双师素质教师的培养、教学环境建设、教学方法、考试考核方式改革和教学组织等一系列课题。     

Quantitative micro-scale flood risk assessment in a section of the Trotuș River,Romania

This paper focuses on the estimation of direct damages caused by three flood scenarios with different return periods in the section Făgetul de Sus – Ghimeş – Palanca Pass of Trotuș River, with the aim of highlighting the need of improved land use plans. The damage for three land use classes (residential building, infrastructure and agriculture) were estimated using the damage curves developed by the European Joint Research Centre (JRC) as well as site specific maximum damage values. The data were processed with the help of the ArcMap 10.2 software and FloodRisk tool from QGIS software. Furthermore, the flood risk was assessed using the damage – probability curves, which associates the damage with the corresponding frequency of occurrence. This method was identified and adapted to the characteristics of the study area in order to develop a methodology of flood risk assessment that is answering the question: does the lack of land use plans increase the vulnerability and the flood damage? The results showed that the greatest damages are registered for the residential building land use class for a flood probability of 0.001. In this case the damages reach up to 60% on the scale range of deterioration factor, the total damage value being 2 million euros. For the same hazard probability the total registered damage value for roads is 7500 euro, for railways is around 12,000 euro, while for agriculture is around 84,000 euro. These results highlight the need of protection measures and land use plans development and implementation. Regarding the protection measures we consider that the egalitarianism would be the concept that should be applied in the study area and also an improved cooperation between government, specialized agencies and local authorities at local level would lead to a more efficient flood risk management process. The proposed methodology can be applied for micro-scale analysis, providing quantitative results regarding the flood damage and flood risk assessment. It includes a detailed vulnerability analysis of the elements-at-risk with the aim of developing a more comprehensive approach of flood risk assessment.