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基于Logistics模型的第四方物流协同研究 总被引：1，自引：0，他引：1
第四方物流是一个由第三方物流等组成的复杂系统,其各组成部分作为独立子系统存在并相互影响。根据协同学中系统论和役使原理,以物流业务量为系统序参量,利用logistic模型,建立系统的协同模型,并根据微分方程稳定性理论,找出系统的有序状态。 相似文献
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针对高新技术企业供应链关系与创新绩效协同发展问题,基于复合系统协同度模型,构建了供应链关系与创新绩效复合系统指标体系,选取145家A股上市高新技术企业,测算2012—2019年高新技术企业供应链关系与创新绩效复合系统协同度.结果表明,我国高新技术企业供应链关系与创新绩效协同度水平较低,但呈现良好正向增长趋势,二者良性互动作用正在建立,协同发展水平有较大提升空间;供应链关系子系统与创新绩效子系统有序度均处于上升状态,但2个子系统有序度尚未实现同步稳定增长. 相似文献
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基于协同学理论,构建由技术创新、节能效率和减排效率三个子系统组成的协同发展评价模型,并进行实证分析。六大高耗能产业2004～2014年总体协同度呈现上升状态,但各产业均出现协同度下降的年份,主要是研发投入不稳定、企业管理疏漏等造成各子系统有序度降低,导致产业协同度降低。节能效率和减排效率子系统之间的协同度高于其他子系统之间的协同度,是由于技术创新子系统有序度低,导致与技术创新子系统有关的协同度都较低,表明提高协同发展水平的关键在于提高技术创新的发展水平。各高耗能产业需要针对各自的短板进行改进,提高系统总体的协同度。 相似文献
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陆杉 《科学学与科学技术管理》2012,33(8):152-158
对供应链的协同性进行测度,可以据此分析供应链的协同状态或者效率问题。运用协同学理论从定性和定量角度分析供应链协同状况,提出了基于关系资本和互动学习的供应链协同性评价模型。计算各子系统(要素)的有序度,然后求出系统的协同度。考虑供应链协同的特点和影响协同的关键要素(序参量),以及数据的可获得性,建立了具有可操作性的指标体系。在指标赋权上,考虑到单人评估的主观性等问题,引入多专家共同评估的群组决策方法,将判断矩阵一致性比例赋权法和专家聚类赋权法相结合。对以Z公司为核心企业的供应链进行协同性评价的实证研究,检验指标体系和模型的有效性,总结研究结论,指出研究的局限性并给出建议。 相似文献
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目前有关科技人才、科技创新与经济发展之间关系的研究主要集中在影响效应和协同效应两个方面。为深入揭示江苏省人才链、创新链和产业链之间的内在联系，以科技人才、科技创新和经济发展3个子系统及其构成的综合发展系统为研究对象，构建江苏省综合发展系统协同度评价指标体系，并基于其2011—2020年相关数据，运用复合系统静态协同度模型和动态变化综合效度评价模型计算各系统协同度发展水平及其变化速度的状态和趋势。结果发现：江苏省综合发展系统相同基期的静态协同度逐年递增，但并未达到高级协同等级；3个子系统具有相互协同的作用，但长期处于低度协同演变状态，协同效应并不稳定，其中科技人才子系统是造成不稳定的主要因素；科技人才结构、研究机构数量、第三产业占比和高新技术企业占比分别是影响科技人才子系统、科技创新子系统和经济发展子系统协同发展的关键因素；各系统协同速度发展趋势呈现不规律波动状态。基于此，提出江苏省政府应建立信息公开、资源共享、部门联动等促进有效协同发展机制，加强人才结构优化，调动企业研发积极性促进人才链、创新链、产业链融合发展，以及注意兼顾各系统协同发展状态与速度等对策建议，以促进实现科技人才、科技创... 相似文献
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农产品供应链动态联盟作为一种集成化程度最高的组织形式,成员的选择非常重要。农产品供应链动态联盟中,企业或组织数量众多、相对分散不稳定,这对供应链稳健发展不利。基于作业成本法在供应商选择模型的成功运用,将作业成本法应用于农产品供应链动态联盟成员选择,是因为在农产品供应链上,从生产源头到最终消费本质上是一层层的供给与采购关系。选择适合的成员对改善农产品供应链动态联盟成员关系,维持农产品供应链良性运作,改善我国农产品供应链效率低下、损耗严重的局面起到积极作用。对作业成本法原理及农产品供应链成员选择标准进行了论述,对基于作业成本法的农产品供应链成员选择模型进行了分析和优化。 相似文献
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精益建筑供应链在减少供应链浪费、提高供应链绩效方面的优势得到了建筑行业的普遍关注,但目前建筑企业的管理组织存在功能缺失现象,无法满足精益建筑供应链对协同合作的基本要求,因此不能达到预期的管理效果。为此,运用活性系统模型对精益建筑供应链的内外组织结构进行设计,对精益建筑供应链协同组织的子系统功能进行分析,为精益建筑供应链的协同合作提供组织基础。 相似文献
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在低碳经济时代,中小制造企业如何实现绿色发展成为重中之重。运用多案例研究方法,深入剖析绿色供应链协同创新模式形成的影响因素及其运作机制,构建了面向中小制造企业的绿色供应链协同创新模式理论模型,并对该模型进行了阐述分析。结果发现：绿色供应链协同创新模式形成的影响因素包括政策支持、社会环境、行业标准、环境问题和安全问题;核心企业以市场方式协助中小制造企业进行绿色创新,并拉动金融机构加入解决资金问题;供应链协同可以缓解中小制造企业资金短缺,先进绿色技术、绿色设备匮乏等问题,提高中小制造企业绿色创新的积极性。 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
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. 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US 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 the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
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. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
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. 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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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. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
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. 相似文献
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Milton Mueller 《The Information Society》2001,17(3):151-163
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. 相似文献
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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.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
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. 相似文献
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Leah A. Lievrouw 《The Information Society》1998,14(2):83-96
The main premise of this article is that in information societies generally, and in virtual social contexts particularly, a distinctive style of interaction to facilitate the communication of difference, heterotopic communication , has emerged. It rests on two cultural foundations: an ideological belief in the positive, socially integrating power of communication, and a prevailing ethic of instrumental rationality, subjective individualism, and strategically practiced self-interest. The former is demonstrated by the use of simulation and spectacle as sources of information; exhibitionism/voyeurism as a communicative style; and the awareness of surveillance. The latter is seen in the competitive use of knowledge as a commodity; a surface globalism masking deep parochialism; lateral as well as vertical information inequity; and the use of public versus private as strategies for engagement rather than as spaces. Those who engage in heterotopic communication resort to their 'own devices' both in the sense of personal agendas, strategies, interests, and interpretations, and in the form of the telecommunication tools that help realize them. These personal and technological devices allow individuals with the right educational and technical resources to avoid exposure to disagreement, difference, or other information that does not serve their direct purposes or reflect their particular views of the world; yet they also help convey the appearance of openness, availability, and cooperation. This style of interaction is used strategically in combination with information and communication technologies to gain social or economic advantages, but it may encourage social separatism and parochialism, inhibit the negotiation of disputes, and emphasize competing interests. 相似文献