共查询到20条相似文献，搜索用时 31 毫秒
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基于区间值直觉不确定语言集(IVIULSs)和GRA-TOPSIS方法提出一种改进型的绿色供应商选择模型。首先,基于IVIULSs对决策者评估供应商时遇到的不确定信息进行处理;其次,利用GRA-TOPSIS方法对备选方案进行优先排序,并选出最佳供应商,该模型可更精准地处理决策者主观评价的不确定性和模糊性,使绿色供应商排名更真实准确;最后,将该模型运用到农业食品行业中,成功验证提出的绿色供应商选择模型的可行性、有效性。 相似文献
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基于动态神经网络专家系统的供应商信用等级分析 总被引：4，自引：0，他引：4
在供应链(SC)中,如何正确地选择敏捷的、有实力和相容的供应商合作伙伴,影响到整个SC的竞争力。而对供应商信用等级进行正确地评价又是实现优化选择供应商合作伙伴的关键,同时也对提升整个SC的竞争力有着极其重要的作用。本文提出了一个供应商信用等级分析指标体系,并通过人工智能神经网络进行评估。考虑到神经网络的收敛性,本文基于重置算法构建了动态神经网络专家系统。应用实例表明,该指标体系与专家系统有效地解决了对供应商信用等级进行分析评估的问题。 相似文献
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基于神经网络专家系统的供应商信用等级分析 总被引：4，自引：0，他引：4
在供应链(SC)中，如何正确地选择敏捷的、有实力和相容的供应商合作伙伴，影响到整个SC的竞争力。而对供应商信用等级进行正确地评价又是实现优化选择供应商合作伙伴的关键，同时也对提升整个SC的竞争力有着极其重要的作用。本文提出了一个供应商信用等级分析指标体系。构建一个基于人工智能神经网络的专家系统，较好地解决对供应商信用等级进行分析评估的问题。 相似文献
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政务信息资源共享是一项复杂且具有重要意义的工程,是政务服务创新的基础,通过识别关键影响因素,进而推动政务信息资源的共享与服务创新。为了解决识别关键影响因素的问题,采用灰色关联分析与模糊聚类分析相结合的模型,进行关键影响因素的识别。通过文献研究结合实践总结,选取43项指标,构建影响因素集和分析流程,进行实证研究。依据灰色模糊聚类的结果,提出推动政务信息资源共享的对策或建议。为省、市级政府的信息资源共享关键影响因素识别工作,提供可借鉴、可参考的整体解决方法。 相似文献
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Carlos Torres-Fuchslocher 《Research Policy》2010,39(2):268-277
The development of local technology-intensive suppliers (t-suppliers) may contribute to both reinforcing the industrial base and supporting the competitiveness of primary production in developing countries. This article explores the role of t-suppliers in natural resource-based economies and outlines a theoretical framework for the analysis of the factors which foster or constrain their development and defines areas for an effective promotion. The proposed model of analysis distinguishes between factors influencing the development of t-suppliers on the level of the main industry, the level of supplier firms or firm-level and the level of external determinants with special reference to industrial policy factors. 相似文献
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Acquiring information properly through machine learning requires familiarity with the available algorithms and understanding how they work and how to address the given problem in the best possible way. However, even for machine-learning experts in specific industrial fields, in order to predict and acquire information properly in different industrial fields, it is necessary to attempt several instances of trial and error to succeed with the application of machine learning. For non-experts, it is much more difficult to make accurate predictions through machine learning.In this paper, we propose an autonomic machine learning platform which provides the decision factors to be made during the developing of machine learning applications. In the proposed autonomic machine learning platform, machine learning processes are automated based on the specification of autonomic levels. This autonomic machine learning platform can be used to derive a high-quality learning result by minimizing experts’ interventions and reducing the number of design selections that require expert knowledge and intuition. We also demonstrate that the proposed autonomic machine learning platform is suitable for smart cities which typically require considerable amounts of security sensitive information. 相似文献
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碳捕集、利用与封存技术是应对气候变化减排二氧化碳的有效技术之一,而将二氧化碳存储于深部地层中,往往因为一些地质及工程的原因而导致二氧化碳泄漏,会对人类和生态环境都会造成巨大的影响。考虑到二氧化碳泄露风险的不确定性,用模糊语言来评价二氧化碳泄露的各种风险因素,将模糊集和证据理论相结合进行二氧化碳地质封存项目安全风险评价。采用Jousselme距离确定的专家权重,并对冲突证据进行修正,再采用Dempster组合规则融合不确定证据信息。通过严格的风险评价程序,从而选择理想的二氧化碳封存场地。 相似文献
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In this paper, we present an approach for evaluating and predicting the student’s level of proficiency when using a certain teaching strategy. This problem remains a hot topic, especially nowadays when information technologies are highly integrated into the educational process. Such a problem is essential for those institutions that rely on e-learning strategies as various techniques for the same teaching activities and disciplines are now available online. In order to effectively predict the quality of this type of (electronic) educational process we suggest to use one of the well known machine learning techniques. In particular, a proposed approach relies on using logic circuits/networks for such prediction. Given an electronic service providing a teaching strategy, the mathematical model of logic circuits is used for evaluating the student’s level of proficiency. Given two (or more) logic circuits that predict the student’s educational proficiency using different electronic services (teaching strategies), we also propose a method for synthesizing the resulting logic circuit that predicts the effectiveness of the teaching process when two given strategies are combined. The proposed technique can be effectively used in the educational management when the best (online) teaching strategy should be chosen based on student’s goals, individual features, needs and preferences. As an example of the technique proposed in the paper, we consider an educational process of teaching foreign languages at one of Russian universities. Preliminary experimental results demonstrate the expected scalability and applicability of the proposed approach. 相似文献
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针对分时操作系统,依据任务执行时间提出系统性能损失作为性能参数,定义最佳节能条件并推出最佳节能频率的计算公式;进而重点论述为实现分时操作系统中的频率管理模块,在系统频率为离散值的前提下,如何对最佳节能频率进行有效近似;最后利用实现了频率管理模块的Linux,实验验证了最佳节能频率以及对其实现的正确性和有效性,而所增加的系统开销仅为3.63%. 相似文献
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《Journal of The Franklin Institute》2022,359(18):10765-10784
In most of existing literature, it is assumed that all of the sensors can work normally. However in some situations, several sensors occur abnormal behavior or stuck at faults such that prior diagnosable decisions may not hold. By this regard, we address the problem of robustly distributed failure diagnosis of discrete-event systems with observation losses in this paper. In order to ensure diagnosability, the notion of robustly diagnosability is proposed in the distributed framework. Motivated by earlier works, new communication models and dilation operators are constructed, based on which the robustly distributed diagnosis problem is converted to a distributed diagnosis problem. One algorithm for the verification of robustly distributed diagnosis is proposed. Followed by it, a necessary and sufficient condition for the robustly diagnosability is presented. Finally, a part of Alipay transaction systems as an application is used to illustrate the construction of some automata and the verification algorithm. 相似文献
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Standards, dominant designs and preferential acquisition of complementary assets through slight information advantages 总被引：1，自引：0，他引：1
Jeffrey L. Funk 《Research Policy》2003,32(8):1325-1341
This paper discusses how firms can use slight information advantages to obtain preferential access to complementary assets and create multi-level dominant designs. It does this by using an analysis of several cellular phone industries and the literature on standards and dominant designs. In the most prominent case, the leading Japanese cellular service provider (NTT DoCoMo) offered preferential information about the “open” Japanese digital phone standard in return for preferential access to the lightest phones from four phone suppliers. These four phone suppliers used the preferential access to this information to obtain preferential cooperation from parts suppliers and to make better design tradeoffs between parts than the other phone suppliers. These superior design tradeoffs enabled the DoCoMo suppliers to create various dominant designs within the Personal Digital Cellular (PDC) standard. The creation of these dominant designs forced other phone and part manufacturers to change their design strategies and copy the designs used by the DoCoMo phone and part suppliers. The result is that DoCoMo and its four phone suppliers have substantially reversed the slides in their market shares. By comparing this case with several other cellular phone industries in which different modes of competition exist, the paper discusses how market conditions determine the way in which standards and dominant designs emerge. 相似文献
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互联网时代,引入优秀的供应商对于企业技术创新有着至关重要的影响!针对现有关于供应商参与协同创新的模式和评价机制研究的不足,本文首先探讨了互联网情境下模块供应商与企业的全流程协同创新模式。其次,提出了一种模糊协同评价方法来解决战略性模块供应商的评价和选择问题,并重点定义了全流程评价指标,引入模糊数概念来描述评价相应指标值,并基于企业全流程部门角度对模块供应商进行了模糊协同评价。为了保证优秀战略性模块供应商资源进入、不合格资源滤出,推动其持续改善并积极参与协同创新,本文提出了"恪守契约精神,共生共赢、超利分成"等针对战略性模块供应商的管理机制。最后,结合青岛海尔制冷器具产品引入战略性模块供应商的实际案例,进一步验证本文所提出理论的可行性和适用性。 相似文献
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In this paper, we develop an approach for solving the problem of sliding mode decentralized adaptive state-feedback tracking with continuous control actions for a class of uncertain nonlinear dynamical systems. In addition to the traditional asymptotic zero error tracking specification in the sliding mode decentralized model reference adaptive control (MRAC) problem formulation, here an additional requirement is specified explicitly in the problem statement. The tracking objective is described by a set of admissible reference trajectories, called a performance tube. The input signal to the reference model, selected within specified bounds, is used as a design parameter. The best reference trajectory is found by solving an additional optimization problem whose criterion penalizes the variance of the control signal. 相似文献
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《普罗米修斯》2012,30(1):83-98
This paper investigates innovative activities, clustering and regional interaction of a group of Information and Communication Technology (ICT) firms in the metropolitan area of Melbourne. In order to make an evaluation of the regional innovation potential among the firms, a written questionnaire was sent to the selected firms. The focal point of the analysis lay in determining innovative activities within individual firms and degree of linkages between different firms. The results indicate that innovative relationships with customers and suppliers are stronger within the region and they tend to co‐operate more on a vertical basis. However, the findings suggest that firms rely only partly on innovation partners within the region and to a considerable extent they are integrated in national and international networks. 相似文献
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Vietnam is an important case for studying the impact of foreign firms’ backward linkages on local firms’ productivity. As an emerging economy Vietnam became the second most popular FDI destination after China in Pacific Asia since 2014. Our empirical analysis for Vietnam as a whole demonstrates a significant difference in the productivity growth between domestic suppliers who have a direct linkage with foreign firms and non-suppliers. This is also true for the Southeast Region (SE) with Ho-Chi-Minh City as economic center. However, in the Red River Delta (RRD), that difference is not statistically significant. Based on in-depth interviews with domestic suppliers, we reveal that in the RRD, effects of foreign firms on the productivity upgrading of domestic suppliers are indirect and limited while internal factors like absorptive capacity are more important for the productivity growth. These regional differences can be traced back to different regional specializations which still persist from the pre-reform era. 相似文献
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《Journal of The Franklin Institute》2022,359(11):5272-5287
In the 3-D path planning, the undulation of terrain have a significant impact on the roll angle of autonomous vehicle (AV). However, the existing 3-D path planning methods rarely consider the roll angle, which may lead to the rollover of AV. To solve this problem, a 3-D path planning system considering the rollover and path length (3DPPS-CRPL) is presented in this work. The 3DPPS-CRPL can plan a shorter path on the basis of inhibiting the roll angle of AV. In order to inhibit the roll angle, a novel roll angle evaluation model based on the undulation of terrain is developed, and the amount of computation is also greatly reduced because complex dynamics is avoided. In order to optimize the path length, both 2-D and 3-D path length are evaluated synthetically by a path length evaluation model. In order to optimize the parameters of 3DPPS-CRPL, a fuzzy-based optimizer is proposed to determine the weight of roll angle and path length. The simulation results prove that 3DPPS-CRPL has excellent performance for inhibiting roll angle and optimizing the path length in 3-D environment. 相似文献