河北省现代服务业吸纳就业能力分析

现代服务业是城市经济系统的一个重要组成部分,也是地区经济和谐发展的重要前提,其对就业的贡献越来越受到人们的关注。本文从河北省现代服务业来分析现代服务业吸纳就业的能力,对于河北省建设现代服务发展先行区、改善民生服务有积极意义。     

Optimal inventory control of empty containers in inland transportation system

In this paper, we deal with an inventory control problem of empty containers in an inland transportation system. In inland container transportation, freights (containers) are transported between terminal and the customer’s location by trucks, trains and barges. Empty containers are an important logistic resource and shipping companies try to operate and manage empty containers efficiently. Because of the trade imbalance between hub ports, empty containers should be periodically repositioned from surplus areas to shortage areas. However, it is not easy to exactly forecast the demand of empty containers, and we therefore need to build an efficient way to reposition the empty containers. In this paper, we consider a shortage area and propose an efficient inventory policy to control empty containers. We assume that demands per unit time are independent and identically distributed random variables. To satisfy the demand of empty containers, we reposition empty containers from other hubs based on the (s, S) inventory policy, and also consider the lease of empty containers with zero lead time. For the leased containers, we should return the number of empty containers leased to the leaser after the specified period. For a given policy, simulation is used to estimate the expected cost rate and we use the optimization tool, OptQuest^® in Arena to obtain the near optimal (s, S) policy in numerical examples.     

知识排他性、知识产权保护与区域技术差距

由于高技术产业的技术排他性特征更明显,加强知识产权保护将引起中国高技术产业密集的省份技术进步速度优于其他省份。基于中国省际数据经验研究表明,知识产权保护在短期内帮助扩大了区域之间的技术差距。     

二元悖论约束下创新型企业绩效的影响因素——基于498家国家级创新型试点企业的实证分析

论文将创新型企业的评价与影响因素研究相联系,重点考察创新型企业如何突破二元性悖论约束,提升创新绩效.通过逐步回归与分位数相结合的方法指出:(1)创新型企业的成长将会受到二元性悖论约束;(2)二元性悖论约束下,创新绩效导向分为产品导向型、专有技术导向型、共性技术导向型;(3)三种不同绩效导向下,投入能力、组织结构、企业行为以及创新文化等因素对创新型企业在作用程度、作用方向与演变特征上产生不同影响.     

区域产业结构与就业结构的互动及其政策含义——以珠三角地区的佛山为例

一定类型经济结构,决定了一定类型的就业结构,而就业结构反过来也会影响到经济结构的变化.本文以珠三角地区的佛山市为例,以19942003年的数据来分析区域产业结构与就业结构的互动关系,并揭示其政策含义.     

Project Management：From Site Office to Project Department

To a construction company,the department of project is the basic unit,and project management is of basic content.With 30 years experiences in market practice since the reform and opening up,project management is developing its own style according to the real situation in China.     

皇马不要品牌只要钱

皇家马德里简历: 成立时间:1902年3月6日。俱乐部主席:佩雷斯·佛洛伦蒂诺(见本图) 俱乐部教练:卡洛斯·曼努埃尔·奎罗兹。主球场:圣蒂亚哥·贝纳伯球场球队历史: 1896年斯凯足球队(前身) 1902年3月6日马德里社会足球俱乐部 1920年6月29日皇家马德里足球俱乐部(由西班牙国王阿方索十三世亲自更名) 第一任教授:阿瑟·约翰逊(英国) 第一任俱乐部董事长:胡安·帕德罗斯(西班牙) 历史进球最多:阿尔弗莱多·迪·斯蒂法诺(218球阿根廷人,后加入西班牙国籍) 历史参赛场次最多:曼努埃尔·桑切斯(墨西哥) 历史联赛最差成绩:第十一名(1948年) 皇马不要品牌只要钱,中国行五天,无一天不生是非。     

论现代科学技术发展的新趋势

在科学技术和社会日益强化的相互作用中,现代科学技术的发展也呈现出了新的趋势和特点,主要表现在科学技术发展的数学化、综合化和一体化等方面。探讨现代科学技术的发展趋势,对于寻求科学技术发展的路径和机遇,从而推动科学技术和社会的发展具有重要意义。     

The Effect of IPO Risks on Auditors’ Decisions: Auditor Designation Case

This study examines the effect of audit risks in the Korean initial public offering (IPO) market on the designated auditors’ decisions. The Korean External Audit Act requires firms to switch from incumbent to new auditors designated by the Securities and Futures Commission after the firm announces a future IPO. This study shows the effects of audit risks by examining if the quality of reported earnings and audit fees significantly differs between IPO‐eligible and IPO‐ineligible firms. Empirical tests first show that discretionary accruals are significantly lower for IPO‐ineligible firms than for IPO‐eligible firms in both the IPO designation period and the following review period. We interpret this result to mean that designated auditors evaluate the IPO‐ineligible (and eventually failed) firms’ listing possibility as low. Second, audit fees are higher for IPO‐ineligible firms in the auditor designation period. This reflects the fact that designated auditors are exposed to future audit risks associated with firms’ post‐IPO financial market troubles if IPO‐ineligible firms attempt to go public. Our study contributes to IPO‐related research by showing the effects of auditors’ risk evaluation on discretionary accruals and audit fees. This study also contributes to accounting policymaking regarding auditor independence.     

道路绿化隔离带消减颗粒物效应及配置参数研究

交通污染已成为城市空气颗粒物污染的主要来源之一,对居民的生活、工作、出行产生了严重影响,而绿化隔离带可作为优化非机动车道和人行道空气质量的一种有效且经济地措施。基于实验测定评价道路绿化隔离带对非机动车道空气颗粒物浓度的影响,并提出分层疏透度来表征样带垂直结构特征,分析绿化隔离带配置方式对街道空气颗粒物浓度的影响。研究结果显示,绿化隔离带可较好地改善街道空气质量,对TSP和PM10的消减效果较PM2.5好;颗粒物的消减效果与样带的植物配置结构有紧密联系,分析结果显示颗粒物消减效率均与0～2m高度区间内的疏透度呈显著负相关。在交通流量较大的城市干道上,应该减少或者避免使用冠大荫浓的高大乔木,多配置结构紧密和叶密度较大的灌木植物。本研究结果可为城市道路绿化参数化设计和优化提供理论支撑,为改善人居生活环境作出贡献。