具有模糊可选时间窗的VRPSPD问题及其混合遗传算法

在经典VRP问题的基础上引入了模糊预约时间和可选时间窗的概念,从顾客满意的角度研究了具有同时配送和回收的车辆路径优化问题,建立了求解此问题的多目标混合整数规划模型,设计了求解此模型的混合遗传算法,并对已有文献中的算例进行了估算求解,估算结果表明,基于2-opt的混合遗传算法在求解没有时间窗约束的VRPSPD方面有比较好的性能.     

滑模在黄岗一区电梯井工程中的应用

本文主要介绍黄岗铁矿一区粉矿回收电梯井应用滑模的施工分析。     

“破窗效应”在中职教育中的应对措施

破窗效应在中职学校的教育教学中具有非常重要的借鉴作用,针对班级管理中出现的各种漏洞需要及时的矫正和修补,以防止职校学生因缺乏正确的判断力而产生的各种行为、思想上的偏差,造成严重的后果。     

Combining common-weights DEA window with the Malmquist index: A case of China’s iron and steel industry

In the conventional data envelopment analysis (DEA) window analysis, a decision-making unit (DMU) in each window is treated as different units in each period so that the evaluation for one unit is performed on different scales over time. This paper proposes a novel window analysis based on common weight across time (CWAT), which evaluates each unit in each window by its common scale independent of time. The model for obtaining common weights is described as linear programming. And the paper suggests the Malmquist productivity index (MPI) on CWAT, CWAT MPI, to analyze productivity change by inheriting the result of window analysis. The numerical experiments are illustrated to examine the validity of CWAT and MPI, and the result shows that the proposed method provides a new evaluation scale compared to previous studies. The proposed model is applied to evaluate the performance of China 45 iron and steel enterprises during 2009–2017. The energy and environmental efficiency are calculated using CWAT, and CWAT MPI analyzes the productivity change.     

Persistency of window dressing practices in the U.S. repo markets after the GFC: The unexplored role of the deposit insurance premium

We investigate whether the regulatory improvements made in the aftermath of the global financial crisis have been effective in limiting bank downward window dressing by means of repos in the United States. We find that a strict application of the Basel III regulation wipes out incentives to engage in window dressing to bolster the level of leverage Tier 1 ratio at quarter-end. We also show that the persistency of window dressing is related to the computation of the Federal Deposit Insurance Corporation assessment base, which motivates banks to engage in window dressing to reduce the deposit insurance premium.     

在公共场所设置手语服务窗口的可行性探究

随着我国城市化建设的不断进步和完善,城市公共场所也在一定程度上满足了广大人民群众在生活中休闲娱乐的要求。目前,城市公共场所在为聋哑人设置手语服务窗口这一举措未得到普及,使得聋哑群体在公共场所获取信息时存在一定的障碍。论文首先阐述了公共场所设置手语服务窗口的必要性,其次分析了在城市公共服务场所设置手语窗口的现状,最后为公共场所设置手语服务窗口提供了解决方案。     

The price of sinful behavior window dressing: Cultural embeddedness on cigarette packages and financial reporting quality

Using hand-collected data from China, we examine whether cultural embeddedness on cigarette packages affects corporate financial reporting quality, and further investigate the moderating effect of foreign directors. The findings reveal that firms in provinces with more cultural embeddedness on cigarette packages exhibit significantly higher extent of discretionary accruals. This finding suggests that cultural embeddedness on cigarette packages as a tobacco-related sinful behavior window dressing shapes unethical social atmosphere, elicits unethical managerial behavior, brings out information distortion, and eventually reduces financial reporting quality. Moreover, the positive relation between cultural embeddedness on cigarette packages and discretionary accruals is less pronounced for firms with foreign directors than for their counterparts. Furthermore, our findings are robust to a variety of sensitivity tests using alternative proxies for cultural embeddedness on cigarette packages and financial reporting quality, and further our conclusions still stand after employing the difference-in-difference approach, two-stage least square regression procedure and two-stage Heckman method to address the endogeneity problem. Lastly, pictorial health warnings on cigarette packages are significantly negatively related with country-level smokers, but cultural embeddedness on cigarette packages is significantly positively associated with tobacco consumption at the province level and owner-manager agency costs in China, providing supportive evidence to our findings.     

The effects of government capital and liquidity support programs on bank lending: Evidence from the syndicated corporate credit market

This study jointly evaluates the effects of the U.S. Treasury's Troubled Asset Relief Program (TARP), the Federal Reserve's Discount Window (DW), and Term Auction Facility (TAF) on bank syndicated lending during the 2007–2009 financial crisis, using a unique data set that tracks the exposure of each lender in each syndicated credit facility in each year. By comparing lending changes within a group of banks that lend to the same facility of the same firm in the same year, it eliminates the impacts of demand-side factors that often bias the results of empirical studies on bank credit supply. Overall, I find that TARP, DW, and TAF played only a marginal role in increasing bank syndicated lending. By examining lending changes at the facility-lender and firm-lender levels, this study is less prone to the reverse causality problem that is inherent in studies using bank-level data. Therefore, this study complements studies using bank-level data and provides policymakers with a balanced view on the effects of these programs.     

我国产业自主创新机会窗口与路径——一个基于产业成长曲线的分析

从分析产业生命周期曲线着手,阐述产业发展过程中产品创新、工艺创新的分布以及技术跃迁规律,探究产业演进各阶段的特点以及创新侧重点,提出了产业自主创新过程中存在的四大机会窗口及四种赶超路径。四大机会窗口即在新产业孕育阶段,机会均等,及早进入;利用产业技术升级,捕捉商机;借助共性技术,改造成熟产业;依靠产业重构,塑造成熟产业。四种赶超路径即前瞻基础研究路径;引进、消化、吸收到自主创新路径;产业联动-协同创新路径;产业跨越路径。     

遗传算法在军事物流运输路径选择中的运用

对物流中常见的运输路径选择问题进行了基于遗传算法的的分析，并主要针对军事目的中的时间限制问题（时间窗），结合军事物流的特点，对其遗传算法模型进行了一定的改进。