一种基于可能度的区间判断矩阵排序法

给出了区间数两两比较的一种可能度公式,以及文献[4]中的方法参数k,m的取值范围,提出了一种基于可能度的区间判断矩阵排序方法。最后,通过算例说明了该法的可行性和有效性。     

基于杂合遗传算法的工艺路线可变Job Shop调度研究

提出一种将遗传算法与启发式规则、模拟退火法等搜索方法结合在一起的杂合遗传算法,用于求解工艺路线可变的JobShop调度问题。通过对某双极型集成电路封装企业的JobShop调度仿真,结果表明算法是有效和可行的。     

多次投资情况下企业最优容量投资策略研究

与仅考虑一次投资机会情况不同,研究分析了多次投资机会对企业最优容量投资策略的影响,利用实物期权方法建立了企业投资时机和容量选择模型.研究结果表明当拥有较多的投资机会时,企业将会拥有较大的容量投资期权,并会提前实施投资,而且最终投资达到的容量规模也越大.     

基于差异产品的政府最优R&D补贴策略研究

本文建立考虑产品差异的三阶段双寡头博弈模型:第一阶段政府选择R&D(Research and Development)补贴率,第二阶段企业确定自己的R8LD水平,第三阶段企业确定产品价格进行伯川德竞争.根据双寡头在第二和第三阶段是否合作,给出了R&D竞争、R&D卡特尔、共同实验、技术共享联盟和研究共同体等五种R&D策略,得到了相应的政府最优R&D补贴率.研究表明,当技术溢出程度较低且产品水平差异不大时,政府给予采用R&D竞争策略企业的补贴率不高于采用R&D卡特尔策略的企业;当技术溢出程度较高且产品水平差异较大时,结果则相反.在政府进行最优补贴后,从促进技术进步、扩大企业规模以及社会福利最大化的角度来看,五种R&D策略中,共同实验最差,技术共享联盟和研究共同体则最优.     

清初"外藩蒙古十三旗"杂考

本文依据清崇德二年蒙古文档案澄清了清代史籍中有关"外藩蒙古十三旗"的说法,解决了清初在内蒙古设旗和朝贡方面的一个疑难问题.指出了<旧满洲档>在记载清初蒙古牛录和户数上的错误和蒙古文档案的价值,还附带讨论了察哈尔部和硕亲王额哲旗不在"外藩蒙古十三旗"内和"外藩二十七旗"及"外藩四十九旗"的问题.     

Methods to assess measurement error in questionnaires of sedentary behavior

Sedentary behavior has already been associated with mortality, cardiovascular disease, and cancer. Questionnaires are an affordable tool for measuring sedentary behavior in large epidemiological studies. Here, we introduce and evaluate two statistical methods for quantifying measurement error in questionnaires. Accurate estimates are needed for assessing questionnaire quality. The two methods would be applied to validation studies that measure a sedentary behavior by both questionnaire and accelerometer on multiple days. The first method fits a reduced model by assuming the accelerometer is without error, while the second method fits a more complete model that allows both measures to have error. Because accelerometers tend to be highly accurate, we show that ignoring the accelerometer's measurement error, can result in more accurate estimates of measurement error in some scenarios. In this article, we derive asymptotic approximations for the mean-squared error of the estimated parameters from both methods, evaluate their dependence on study design and behavior characteristics, and offer an R package so investigators can make an informed choice between the two methods. We demonstrate the difference between the two methods in a recent validation study comparing previous day recalls to an accelerometer-based ActivPal.     

日美企业柔性之比较与借鉴

本文在阐明企业柔性本质的基础上 ,系统比较日美两国企业各维度柔性的高低 ,分析日本企业柔性整体水平较高和我国企业柔性较低的原因所在 ,提出增强我国企业柔性的建议。     

Pollution disclosures,pollution performance and economic performance

This study examines the association between pollution disclosures and pollution performance and between pollution disclosures and economic performance for firms in highly polluting industries. An index of pollution disclosures is developed and correlated with indices of pollution performance and economic performance. The results confirm earlier findings that there is no association between pollution disclosures and pollution performance. As far as the association between economic performance and pollution disclosures is concerned, the results show that the subgroup of large firms with poor economic performance provides the most detailed pollution information. For smaller firms there is no association between economic performance and pollution disclosures.     

Correlation bias in U.S. census adjustment

One form of error that can affect census adjustments is correlation bias, reflecting people who are doubly missing--from the census and from the adjusted counts as well. This article presents a method for estimating the total national number of doubly-missing people and their distribution by race and sex. Application to the 1990 U.S. census adjustment leads to an estimate of 3 million doubly-missing people. Correlation bias is likely to be a serious problem for census adjustment in 2000. The methods of this article are well suited for measuring its magnitude.     

中国的东北和日本的东北——对中日构筑“大东北经济圈”的思考与建议

2006年10月安倍首相上任伊始，便决定访问中国，展开了“破冰之旅”，结束了中日之间自2001年小泉上台由于参拜靖国神社引发的对立和矛盾，此后“融冰之旅”、“迎春之旅”使中日战略互惠关系不断向前推进。胡锦涛总书记的“暖春之旅”使两国战略互惠关系进入全面升级阶段。在上述氛围推动下，两国的经贸也不断取得突破，中日贸易超过美日贸易，中国成为日本第一大贸易伙伴。随着两国在各个领域的相互依赖不断加深，以区域合作为纽带、以友好城市发展为拉动，两国的地方交流也出现蓬勃发展势头。尤其是我们的东北振兴战略持续深化，使两国在东北地区的各种合作不断增加，学术、经济和企业界甚至发出了打造“中日大东北经济圈”的热切呼声。从中日经贸互动和地方国际合作背景来看，随着两国在东北地区合作的不断深入，中日构筑“东北经济圈”不但具有可能性而且时机日渐成熟。