江苏主导产业战略性选择及发展研究

本文从各产业的发展潜力与需求、劳动生产率的变化、产业之间的关联关系、进出口的状况和资金技术密集状况五大方面对新世纪江苏主导产业的战略性选择及发展进行了探讨。     

模型算法在企业的场址选择及其内部设施的平面布置中的应用

企业的场址选择及其内部设施的平面布置形式，对于企业的运输费用具有举足轻重的作用。本文对企业和内部设施的布置进行模型设计，并通过层次分析法对场址选择方案进行比选．采用对目标函数的优化对企业内部设施的平面布置形式进行优化。     

Recruitment and selection services: Efficiency and competitive reasons in the outsourcing of HR practices

While human resource (HR) activities have traditionally been performed internally, the outsourcing of HR practices is a rapidly increasing phenomenon. The accelerated rate of HR outsourcing also corresponds to a sweeping change in which non-transactional activities, such as recruitment, selection and training, are among the most outsourced HR practices. This article investigates the outsourcing decisions of recruiting and selection (R&S). It develops a predictive model based on efficiency drivers, rooted in transaction cost economy (TCE), and competitive motivations, derived from the resource-based view. The model has been tested in a sample of 276 medium and large enterprises in two specific contexts: the outsourcing of administrative R&S practices (job advertisement and pre-screening) and that of the more strategic R&S practices (colloquia and selection). Findings confirm the relevance of both categories of predictors, but they reveal how efficiency motivations are more important for the decisions to outsource administrative R&S practices while competitive issues matter more for the strategic side of R&S activity. Theoretical and managerial implications are offered on the basis of such evidence.     

箱式变电所在住宅小区中设计应注意的问题

箱式变电所以其显著优点,在住宅小区建设(改造)中得到推广应用。文章以南宁市某住宅小区为例,论述箱式变电所设计中应注意的问题。     

土石方工程施工机械设备选型评价模型研究

以土石方工程施工过程中的机械设备选型为研究对象,应用层次分析法构建土石方工程施工机械设备选型评价层次结构模型,分析求得机械设备选型主要影响因素的权重系数,为土石方工程施工单位进行机械选择提供相对科学的评判方法和量化指标。     

Proportional Odds Models with High‐Dimensional Data Structure

The proportional odds model is the most widely used model when the response has ordered categories. In the case of high‐dimensional predictor structure, the common maximum likelihood approach typically fails when all predictors are included. A boosting technique pomBoost is proposed to fit the model by implicitly selecting the influential predictors. The approach distinguishes between metric and categorical predictors. In the case of categorical predictors, where each predictor relates to a set of parameters, the objective is to select simultaneously all the associated parameters. In addition, the approach distinguishes between nominal and ordinal predictors. In the case of ordinal predictors, the proposed technique uses the ordering of the ordinal predictors by penalizing the difference between the parameters of adjacent categories. The technique has also a provision to consider some mandatory predictors (if any) that must be part of the final sparse model. The performance of the proposed boosting algorithm is evaluated in a simulation study and applications with respect to mean squared error and prediction error. Hit rates and false alarm rates are used to judge the performance of pomBoost for selection of the relevant predictors.     

Which covariates should be controlled in propensity score matching? Evidence from a simulation study

Propensity score matching is a widely‐used method to measure the effect of a treatment in social as well as medicine sciences. An important issue in propensity score matching is how to select conditioning variables in estimation of the propensity scores. It is commonly mentioned that variables which affect both program participation and outcomes are selected. Using Monte Carlo simulation, this paper shows that efficiency in estimation of the Average Treatment Effect on the Treated can be gained if all the available observed variables in the outcome equation are included in the estimation of propensity scores. This result still holds in the presence of non‐sampling errors in the observed control variables.     

浅谈现代物流园区的规划与布局

物流园区是具有一定规模和综合服务功能的物流集结点,在我国尚处于发展初期,面临的规划与布局不合理问题已成为一大障碍。本文通过分析我国物流园区发展现状及规划、布局中面临的主要问题,提出发展策略。     

港口物联网驱动的区域产业布局

基于产业组织与布局理论,首先提出物联网产业组织与布局开放系统模型,然后结合面向智慧港口的物联网技术框架,提出智慧港口驱动的物联网产业布局钻石模型,最后给出基于该模型的河北沿海地区物联网产业布局策略。