基于堆垛的集装箱混合装卸方法的优化

集装箱船舶大型化的趋势下,在集装箱码头混合装卸方法的基础上提出了基于堆垛的混合装卸优化方法,并且将一组甲板对应的多贝位集装箱分解为多个单贝位集装箱装卸研究方法模型求解.以最小化单一贝位集装箱装卸的完成时间为目标,建立单贝位数学模型,使用遗传算法求解单贝位的最小完成时间,再根据其和求得一组甲板上、下集装箱装卸的完成时间,并拓展到多组甲板情况.通过数值计算,与传统装卸方法对比分析,验证了模型和算法的可行性和有效性,为大型集装箱船舶装卸方法的优化提供了依据.     

港口装卸工艺合理化探析

本文从质量安全和环境保护、装卸设备、工艺布置与流程、装卸作业、劳动组织、装卸成本等方面,系统分析研究了港口装卸工艺合理化的基本原则和方法,揭示港口装卸作业遵循这些合理化原则,有利于机械设备和人力的更好利用,有利于作业流程的合理布置,有利于缩短船舶在港停留时间,有利于降低港口装卸成本,有利于装卸效率的提高。     

基于堆场混堆的集装箱异贝位同步调度方法

针对集装箱码头内装卸桥、集装箱卡车与龙门吊三者对集装箱装卸问题,基于现今码头同步装卸技术的思想,在深入分析研究该项技术在集装箱装卸调度方法的实际应用基础上,结合集装箱贝位协同作业的同步装卸方法,提出了基于堆场混堆的集装箱异贝位同步调度方法,建立了集装箱卡车总行驶距离最小的数学模型,并运用单亲遗传算法对模型进行求解.运用Matlab进行数值模拟,对比传统单程装卸模式的数据,验证了基于堆场混堆的集装箱异贝位同步调度方法的可行性与有效性.     

基于混堆的集装箱同贝位同步调度方法

本文针对集装箱码头内装卸桥、集装箱卡车与龙门吊三者对集装箱装卸问题,基于现今码头同步装卸技术的思想,在深入分析研究该项技术在集装箱装卸调度方法的实际应用基础上,提出了基于混堆的集装箱同贝位同步调度方法,建立了集装箱卡车总行驶距离最小的数学模型,并对模型进行求解。运用Matlab进行数值模拟,对比传统单程装卸模式的数据,验证了基于混堆的集装箱同贝位同步调度方法的可行性与有效性。     

多船岸桥协同调度研究

分析了全岸线多船装卸作业的岸桥调度问题,以缩短船舶停泊时间以及岸桥作业均衡为决策目标,建立了面向多船岸桥协同调度问题的混合整数规划优化模型。设计了一种基于矩阵编码的单亲遗传算法对全岸线装卸任务进行分组求解。通过实验算例来比较所提出的调度方法与传统调度方法得知,多船岸桥协同调度方案更能有效地提高岸桥的装卸效率。     

浅述港口装卸工艺的发展趋势

随着我国港口现代化进程地加快,港口装卸工艺也在发生变化。本文对目前港口装卸工艺的现状以及问题进行分析,然后对港口装卸工艺的发展趋势进行了研究,以期能够为港口的装卸工艺设计提供一定的参考价值。     

关于提高成都东站专用线装卸车经济作业效率的思考

在分析制约成都东站专用线装卸车经济作业效率主要因素的基础上,提出了专用线单位增加基础投入、规范装卸管理,铁路车站加强装卸作业管理、加大专用线装卸经济作业效率考核力度等建议,以提高专用线装卸经济作业效率。     

港口装卸工艺合理化探析

港口装卸是港口的主要工作和职能,是港口物流安全高效的重要保障,如何能够在最短的时间里,完成更多的装卸任务,提高工作效率,降低生产成本,就要从装卸工艺入手,合理、科学、高效的装卸工艺是港口安全生产的基础,装卸工艺合理化的分析是现代化港口建设的关键,是扩大再生产的主要手段。通过对装卸设备、装卸工艺线设计、装卸作业指导等分析研究,以揭示港口装卸作业遵循的合理化规律。     

特定环境港口装卸设施变频器的维护保养

变频器作为港口装卸设施的重要电机驱动器,在海南特定环境条件下,维护保养与否已经成为保障港口企业的门吊、岸桥、场地吊等装卸设施正常运行的关键性问题。通过分析海南特定环境对港口装卸设施的变频器、IGBT及其元器件危害的原因,准确定位其维护保养,识别和组织、实施、创新相应的措施与方法,制度化、规范化其维护保养,确保其安全、正常运行,更好地为港口装卸生产服务。     

如何加强武威货场装卸安全管理

铁路货物装卸安全直接影响行车安全、货物运输安全以及运输效益,结合武威货物装卸问题多发的现象,整章建制,加强装卸队伍培训管理,夯实安全基础,提升委托装卸服务质量。     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.     

Cooler temperatures inductive to locust outbreaks

Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.     

Rough Justice: A Statistical Assessment of ICANN's Uniform Dispute Resolution Policy

Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP.     

Prevalence of soft neurological signs in Chinese people

Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.     

Monoculture Rubber Plantations Have Negative Ef ects on Controlling Splash Erosion

<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence     

Chinese Scientists Use Earth Observation Technologies to Study and Protect Wild Camels

<正>Chinese scientists plan to apply Earth Observation technologies to protect the critically endangered wild camels(Camelus ferus).With the help of remote sensing,satellite positioning,geographical information system and wireless sensors networks,they will be able to access the distribution and population of the wild camels and protect their habitats.The project will be carried out by the International Research Center for Wild Camel Conservation,which was jointly established earlier this year by the Institute of Remote Sensing and Digital Earth(RADI)of the Chinese     

More than Skin Deep – Understand Skin Biology by Means of Dermatogenomics

<正>The Paul Gerson Unna Research Group on Dermatogenomics was founded in October 2012 at the Partner Institute for Computational Biology.The ultimate goal of the group is to understand the biology of skin and skin appendages.