The Dynamics of Location in Home Price

It is well established that house prices are dynamic. It is also axiomatic that location influences such selling prices, motivating our objective of incorporating spatial information in explaining the evolution of house prices over time. In this paper, we propose a rich class of spatio-temporal models under which each property is point referenced and its associated selling price modeled through a collection of temporally indexed spatial processes. Such modeling includes and extends all house price index models currently in the literature, and furthermore permits distinction between the effects of time and location. We study single family residential sales in two distinct submarkets of a metropolitan area and further categorize the data into single- and multiple-transaction observations. We find the spatial component is very important in explaining house price. Moreover, the relative homogeneity of homes within the submarket and the frequency with which homes sell affects the pattern of variation across space and time. Differences between single and repeat sale data are evident. The methodology is applicable to more general capital asset pricing when location is anticipated to be influential.     

钻机钻进过程人机系统可靠性分析

在全面分析钻井机械的组成、钻进过程的特点和人的特性的基础上，建立钻机钻进过程人机系统可靠性模型。整个系统由人的行为、钻进参数采集、井喷预兆监测、钻进参数调节和井喷控制5个子系统，通过人机接口构成。根据人的感知、判断决策、执行操作行为进程．引入行为形成因子和差错纠正能力，构成人的行为模式，导出人的行为可靠度，进而得出钻机钻进过程人机系统的可靠度。     

虚拟建设的发展、内涵与组织管理流程

建筑企业若想在激烈的竞争中取得有力的地位，就必须提高自己的管理水平和竞争能力，而虚拟建设就是建筑企业提高竞争力的一条有效途径。文章从计算机技术与建筑业的结合入手研究虚拟建设的发展，揭示虚拟建设的内涵，构建了虚拟项目组织的管理流程。     

国内外二苯基甲烷二异氰酸酯生产应用及市场分析

对国内外二苯基甲烷二异氰酸酯市场供需作了综述。认为二苯基甲烷二异氰酸酯作为重要有机原料品种之一．在我国发展前景看好。指出在现行工艺中，传统光气法对环境有污染，因而从人类社会可持续发展出发，应将以非光气法的二苯基甲烷二异氰酸酯合成作为今后技术开发目标。     

异丙苯生产技术和市场分析

综述了国内外异丙苯生产技术发展动向和市场供需情况，对异丙苯的主要工艺技术指标进行了对比，并预测了异丙苯市场发展趋势。高选择性将是异丙苯生产技术趋势之一，随着异丙苯生产能力激增，建议有效抵御市场风险。     

The evolution of the seven steps of selling

The traditional seven steps of selling is perhaps the oldest paradigm in the sales discipline. The seven steps model has served as a basic framework in sales training, personal selling textbooks, and teaching personal selling classes. Very little has changed in this framework since the turn of the 20th century. This article reviews the traditional seven steps of selling, examines transformative factors that have led to changes in each step, and presents an evolved seven steps process. While the traditional seven steps reflected a selling orientation on the part of a firm, the evolved selling process reflects more of a customer orientation in that the focus is on relationship selling—that is, securing, building, and maintaining long-term relationships with profitable customers.     

Expected exponential utility maximization of insurers with a Linear Gaussian stochastic factor model

In this paper, we consider the problem of optimal investment by an insurer. The wealth of the insurer is described by a Cramér–Lundberg process. The insurer invests in a market consisting of a bank account and m risky assets. The mean returns and volatilities of the risky assets depend linearly on economic factors that are formulated as the solutions of linear stochastic differential equations. Moreover, the insurer preferences are exponential. With this setting, a Hamilton–Jacobi–Bellman equation that is derived via a dynamic programming approach has an explicit solution found by solving the matrix Riccati equation. Hence, the optimal strategy can be constructed explicitly. Finally, we present some numerical results related to the value function and the ruin probability using the optimal strategy.     

Optimal pair-trading strategy over long/short/square positions—empirical study

Suzuki [Automatica, 2016, 67, 33–45] solves the optimal, finitely iterative, three-regime switching problem for investing in a mean-reverting asset that follows an Ornstein–Uhlenbeck price process and find explicit solutions. The remarkable feature of this model is that the investor can explicitly take either a long, short or square position and can switch the position, with transaction costs, during the investment period. We run empirical simulations of such multiple-regime switching models. There are very few such attempts in the existing literature because it is difficult to find, first, an explicit solution to the problem and second, appropriate financial assets that follow the artificial stochastic process required by the mathematical model. According to the Monte Carlo simulations of the optimal pair-trading strategy, the mean daily Sharp ratio is more than 2.3, whereas the mean Sharp ratio for the historical simulation of the ‘stub’ pairs (combinations of parent/subsidiary companies) is 0.6886. We believe that the results obtained from performing the empirical simulations are remarkable and consider that the optimal switching strategy of the rigorous mathematical model is applicable to businesses in the real world. For the reference many pseudo-program codes are added, which can help to replicate the optimal trading strategies.     

论公平就业立法是创建和谐社会的重要举措

我国目前劳动力市场竞争激烈,劳动者处于弱势地位,加之国家对用人单位并无明确具体的公平就业法律规定,因此,各类不公平就业现象出现,为构建和谐社会设置了一道人为障碍。在市场经济条件下,法律法规才是规范行为、获得合法权益的最有效保障。     

医院门诊业务流程病人满意度研究

提供了一套构建医院门诊业务流程病人满意度指标体系的方法。首先对一所二级甲等医院门诊病人进行了两次问卷调查;在数据分析的基础上,提取指标并确定权重。最后,构建了一套评价医院门诊业务流程病人满意度的指标体系。