设计素描课程的建设与改革

设计素描课程作为设计基础教育的重要环节，应适应设计产业生产方式及知识结构根本变化的需要，从教学内容、教学方法和手段等方面进行深层次的改革，突出空间思考能力的培养、超常视觉的开发和构想能力的训练，从而强化创造性思维和表现能力，并从课题设计、配套教材和网络课程辅助教学与互动等方面全面建设。     

小车床尾座镗孔专用夹具设计

近年来,机械行业竞争越来越激烈,许多企业对生产效率和产品质量都提出了较高的要求。市场竞争要求产品既要质量好,又要成本低。使用工装夹具可以实现工件的快速装夹,减少辅助加工时间,降低加工成本。本文设计了一套小车床尾座加工的专用夹具,其特点是结构紧凑,操作迅速、方便、省力,可以保证较高的加工精度和生产效率。     

The perils of endogeneity and instrumental variables in strategy research: Understanding through simulations

In this paper we use simulations to examine how endogeneity biases the results reported by ordinary least squares (OLS) regression. In addition, we examine how instrumental variable techniques help to alleviate such bias. Our results demonstrate severe bias even at low levels of endogeneity. Our results also illustrate how instrumental variables produce unbiased coefficient estimates, but instrumental variables are associated with extremely low levels of statistical power. Finally, our simulations highlight how stronger instruments improve statistical power and that endogenous instruments can report results that are inferior to those reported by OLS regression. Based on our results, we provide a series of recommendations for scholars dealing with endogeneity. Copyright © 2013 John Wiley & Sons, Ltd.     

电力消费与中国经济增长

本文收集中国28个省、市、自治区1978~2011年面板数据,使用新近的基于误差修正的面板协整检验方法检验电力消费与中国经济发展之间的协整关系,同时对两者之间进行格兰杰因果关系检验。研究结果表明电力消费与中国经济增长之间存在着协整关系,而且从长期来看,存在着电力消费→GDP单向的因果关系;从短期来看,存在着GDP→电力消费单向的因果关系。本文还将中国分成东、中、西三大区域经济地带,验证不同区域电力消费与经济增长之间的格兰杰因果关系,结果表明从长期来看,东、中、西部地区均存在着电力消费→GDP单向的因果关系,而从短期来看,只有西部地区存在着GDP→电力消费单向的因果关系。     

以就业为导向,强化工程素质——食品科学与工程专业人才培养方案与课程体系改革与实践

文章通过分析普通本科院校食品科学与工程专业人才就业现状,提出了以就业为导向的改革必要性,分析了该专业人才培养方案与职技院校人才培养方案和课程体系区别,并就我院专业培养方案与课程体系改革与实践经验进行了详细介绍。     

普通车床改为端面螺旋油槽专用车床的设计

介绍了将C6140普通车床改造成摩擦片端面螺旋油槽专用车床的设计方案，通过技术改造使长期闲置的旧设备发挥了新的作用，即满足了生产需要，又节省了资金，取得良好效果。     

Optimal versus orthogonal and equivalent-estimation design of blocked and split-plot experiments

This article provides an overview of the recent literature on the design of blocked and split-plot experiments with quantitative experimental variables. A detailed literature study introduces the ongoing debate between an optimal design approach to constructing blocked and split-plot designs and approaches where the equivalence of ordinary least squares and generalized least squares estimates are envisaged. Examples where the competing design strategies lead to totally different designs are given, as well as examples in which the optimal experimental designs are orthogonally blocked or equivalent-estimation split-plot designs.     

A Panel Unit Root and Panel Cointegration Test of the Complementarity Hypothesis in the Mexican Case: 1960–2001

Using panel data, this paper tests whether public and private capital have a positive and significant effect on aggregate output and labor productivity for Mexico during the 1960–2001 period. The richer information set made possible by the sectorial data enables this study to utilize the methodologically sound “group-mean” fully modified ordinary least squares (FMOLS) procedure developed by Pedroni to generate consistent estimates of the relevant panel variables in the cointegrated production (labor productivity) function. The results suggest that, in the long run, changes in the stocks of public and private capital and the economically active population (EAP) have a positive and economically significant effect on output ( and labor productivity). The period is also broken down into two sub-periods: 1960–1981 (state-led industrialization) and 1982–2001 (neoliberal model). The estimate for the public capital variables clearly shows that it had a relatively more important economic effect during the earlier state-led period.

基于排队论的配送策略研究

在配送问题中,配送车辆相当于服务台,等待被送货的地点相当于顾客。为保证配送请求被多方面考虑,将送货地点的请求分为“普通请求”和“紧急请求”,对于“普通请求”应用层次分析法确定配送次序,另外对于“紧急请求”采用单独配送车辆进行服务。应用多服务台混合制模型获得排队系统的各项指标,与单服务台模型进行各项指标对比,效果明显较好。     

陕西高校体育资源配置与可持续发展的研究

依托资源管理的"人力资源、物资资源、信息资源"结构框架,通过问卷调查等方法对陕西高校体育资源的结构、功能及其特征进行分析;归纳和分析存在的问题及其原因,以经济层面为切入点,构建新时期学校体育资源优化配置的机制和方式,对教育界展开可持续发展展开具体讨论和研究。