共查询到20条相似文献，搜索用时 15 毫秒
1.
科技评估方案是科技评估活动中一个关键环节。对如何编制科学、完整、有针对性的评估方案进行了较为深入地研究，编制科技评估方案应明确评估目的的评估对象，准确地进行评估需求分析，科学地设计评估框架，确定信息的采集范围和方法、选择好评估人员等。对独立、客观、公正和科学地开展科技评估提供了可行的操作方法和原则。 相似文献
2.
The inability to touch products is a fundamental shortcoming in online shopping because humans typically use the sense of touch to evaluate the utilitarian product functionality and to obtain hedonic sensory enjoyment, which the instrumental and autotelic need for touch capture. This study of 900 consumers looks at the interplay between need for touch and imagination to study how imagination compensates for the lack of touch when consumers shop in a 360-virtual store. The study finds that while telepresence of a 360-virtual store improves consumer attitudes toward virtual shopping, the need for hedonic sensory enjoyment – autotelic need for touch – significantly reduces this effect. Further, imagination can compensate for the need for touch; yet this finding holds only for the instrumental need for touch, not for the autotelic need for touch. Consequently, we conclude that imagination can compensate for the utilitarian need to touch products in a 360-virtual store. 相似文献
3.
Sliding mode control (SMC) is among the popular approaches for control of systems, especially for unknown nonlinear systems. However, the chattering in SMC is generally a problem that needs to be resolved for better control. A time-varying method is proposed for determining the sliding gain function in the SMC. Two alternative tuning algorithms are proposed for reducing the sliding gain function for systems. The first algorithm is for systems with no noise and disturbance but with or without unmodeled dynamics. The second algorithm is for systems with noise, disturbance, unmodeled dynamics, or any combination of them. Compared with the state-dependent, equivalent-control-dependent, and hysteresis loop methods, the proposed algorithms are more straightforward and easy to implement. The performance of the algorithms is evaluated for five different cases. A 90% to 95% reduction of chattering is achieved for the first algorithm used for systems with sensor dynamics only. By using the second algorithm, the chattering is reduced by 70% to 90% for systems with noise and/or disturbance, and by 25% to 50% for systems with a combination of disturbance, noise, and unmodeled dynamics. 相似文献
4.
5.
企业数据向善:概念测量与展望 《科学学研究》2022,40(11):2019-2026
近年来频发的大数据杀熟、隐私泄露等数据安全事件,促使实业界和学术界开始反思企业如何合理使用数据,用数据来做好事,企业数据向善成为极具研究潜力和研究价值的新领域。本研究首先明确了企业数据向善的概念,将其划分为负责任的使用数据和数据慈善两个维度,并回顾了企业社会责任、资源基础观、负责任的研究与创新、公共物品等基础理论,在此基础上开发企业数据向善量表,最后提出企业数据向善未来研究的五大议题。本研究丰富和拓展了企业数据向善理论研究,为未来的企业数据向善研究执炬,不仅对学术界关注企业数据向善问题具有启发意义,而且对实业界实施数据向善造福社会具有启示意义。 相似文献
6.
7.
对近年来我国成立的自然科学与社会科学高等研究院进行了梳理,总结了我国大学高等研究院的特点和问题,认为高等研究院发展将从粗放走向集约,人文社科高等研究院可能会继续繁荣,跨地区、跨学科、跨单位的高等研究院将会有所突破,政府对高等研究院将加强管理,高等研究院的内涵将进一步模糊。 相似文献
8.
学科政策是科学政策的重要组成部分，对国家科学的发展影响深远。本文从学科的功能和学科政策的基本内涵出发，考察学科政策的社会经济因素及其影响，比较分析发达国家学科政策的主要类型和特点，指出国家科学资助机构在促进学科发展中的独特优势，进而提示对我国学科建设和学科发展的启示意义。 相似文献
9.
根据《商标注册用商品和服务国际分类》（第九版）,药品属于第五类商品。该类商品包括“人用药、医用营养品、兽药、农药”等。作为一种特殊商品,药品尤其是人用药品直接关系到广大消费者的生命健康安全,大多数国家对药品的生产和销售均有专项法规予以规范,在药品商标的注册上亦执行比较特殊的审查标准。 相似文献
10.
《Information processing & management》2023,60(3):103319
Marketing is all about finding out what your customers want and need. The information is used to create the model and improve the quality of products and services to satisfy customers. There are two major parts to a sale's planning: containing sales tactics and sales strategy. To aid in business decision-making, a data warehouse (DW) for sales collects and organizes relevant and historical data. DW is also a method for combining data from various heterogeneous databases (DB) and other sources of information for analysis. In this paper, Information analysis for dynamic Sale planning by AI Decision support process was done. Particle Swarm Optimization (PSO) and Quantum Particle Swarm Optimization (QPSO) algorithms have been used to find optimal MVs for sale planning since several authors prove that these algorithms are better than other existing algorithms. MVs selection is based on three factors: time running of MVs, area of MVs, and access frequency of MVs by manipulating the selection result using a weighted combination of each factor as needed by the designer. For PSO, the most cost of frequency was 1.924 for View (V) 11, while for QPSO, it was 1.722 for V11. For PSO, the most cost of time was 1.931 for V2, while for QPSO, it was 1.221 for V22. For PSO, the most cost of the area was 1.800 for V17, while for QPSO, it was 1.071 for V17. The results revealed that Quantum Particle Swarm Optimization is much more accurate than Particle Swarm Optimization. 相似文献
11.
采用Norton模型对产品更新换代扩散趋势的研究——以中国互联网用户上网方式的更新换代为例 总被引：2，自引：0，他引：2
本文在Bass模型的基础上,详细介绍了产品更新换代扩散的Norton模型,并例举了通信产业的产品更新换代扩散的实例,中国互联网上网方式的更新换代的发展。模型参数的估算是影响模型准确性的一个重要方面,论文总结了前人的成果,采用遗传算法作为Norton模型的参数估计方法,并对中国互联网的上网方式,如拨号上网、ISDN(综合业务数字网)上网、宽带上网的扩散进行实证研究,模型得出另人满意的结果,并将结果与Bass模型进行了比较和讨论,得出结论,采用Norton模型研究产品更新换代扩散是一种更好的选择。最后,论文对中国移动通信网络发展提出展望。 相似文献
12.
13.
基于人才争夺的知识获取策略研究 总被引：3，自引：0，他引：3
战略管理研究越来越强调知识在企业赢得竞争优势中的重要作用。通过争夺作为知识载体的人才已经成为企业获取外部知识的一个重要手段。本文分析人才争夺与知识获取之间的关系,识别基于人才争夺的知识获取策略存在的问题并提出相应对策建议。 相似文献
14.
论图书馆的社会化变革 总被引：3，自引：0，他引：3
图书馆面临外部多种信息媒体的竞争与内部机制不活的困境，只有进行以法制建设为基础；以效益为中心；以竞争为机制；以投资体制的改革为突破口；以信息组织与服务、信息增值为已任的一系列社会化变革，才能再创辉煌。 相似文献
15.
R.C. Rosenberg 《Journal of The Franklin Institute》1979,308(3):343-352
This paper proposes an extended definition of reciprocity for a multiport junction structure based on the concept of essential gyrator coupling. Two theorems are given for junction structures containing gyrators and an algorithm is presented for identifying essential gyrators. The results are useful both theoretically and for designing efficient computation procedures for junction structures. 相似文献
16.
中国古代救荒书的内容涉及历史时期救荒制度建设、农业减灾技术措施、工程减灾技术措施、生物减灾技术措施、灾害预防、灾民生活等各个方面,其中所蕴涵的减灾技术资料比较全面,是我们研究古代减灾科学技术和中国社会经济史的重要资料,对今天的防灾救灾工作也有借鉴指导意义。文章通过对中国古代救荒书中减灾科学技术资料的分析整理,将其系统划分为救荒减灾制度建设资料、农业减灾技术资料、水利工程减灾技术资料、生物减灾技术资料、灾害预防技术资料、野菜谱录资料六大方面,并对其分布情况及其利用价值简要分析。 相似文献
17.
电视需要倾听,倾听为了传播。访谈节目主持人要把“善于倾听”作为重要的基本功,主持人真正的倾听,是访谈节目成功的重要保证。本文首先探讨了电视访谈类节目及其主持人的界定,进而论述了倾听对于访谈节目主持人的重要作用。 相似文献
18.
Both structured and unstructured data, as well as structured data representing several different types of tuples, may be integrated into a single list for browsing or retrieval. Data may be arranged in the Gray code order of the features and metadata, producing optimal ordering for browsing. We provide several metrics for evaluating the performance of systems supporting browsing, given some constraints. Metadata and indexing terms are used for sorting keys and attributes for structured data, as well as for semi-structured or unstructured documents, images, media, etc. Economic and information theoretic models are suggested that enable the ordering to adapt to user preferences. Different relational structures and unstructured data may be integrated into a single, optimal ordering for browsing or for displaying tables in digital libraries, database management systems, or information retrieval systems. Adaptive displays of data are discussed. 相似文献
19.