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11.
Wen Sheng Du 《国际智能系统杂志》2019,34(11):2835-2862
Weighted power means with weights and exponents serving as their parameters are generalizations of arithmetic means. Taking into account decision makers' flexibility in decision making, each attribute value is usually expressed by a -rung orthopair fuzzy value ( -ROFV, ), where the former indicates the support for membership, the latter support against membership, and the sum of their th powers is bounded by one. In this paper, we propose the weighted power means of -rung orthopair fuzzy values to enrich and flourish aggregations on -ROFVs. First, the -rung orthopair fuzzy weighted power mean operator is presented, and its boundedness is precisely characterized in terms of the power exponent. Then, the -rung orthopair fuzzy ordered weighted power mean operator is introduced, and some of its fundamental properties are investigated in detail. Finally, a novel multiattribute decision making method is explored based on developed operators under the -rung orthopair fuzzy environment. A numerical example is given to illustrate the feasibility and validity of the proposed approach, and it is shown that the power exponent is an index suggesting the degree of the optimism of decision makers. 相似文献
12.
Mercedes Delgado 《Industry and innovation》2020,27(8):842-870
ABSTRACT This paper quantifies the extent of co-location of innovation and production for industry clusters with varying knowledge intensity. If input-output, knowledge, and skill linkages are interdependent and geographically bounded, then we would expect innovation and production to be co-located in regional clusters. However, theory predicts that the degree of agglomeration benefits associated with co-location may vary across economic activities with different knowledge intensity. Using data from the U.S. Cluster Mapping Project, I develop measures of the co-location of innovation and production for 27 industry clusters, examining patterns across regions and over time (1998–2015) in the United States. I find that there is a significant co-location of innovation and production for many clusters, especially for those with higher knowledge intensity. This paper focuses on the Information Technology and Analytical Instruments cluster and the Automotive cluster to illustrate the co-location measures and the micro-geography of innovation and production. 相似文献
13.
Satoshi Nogami Katsuhiko Minoura Nao Kiminami Yui Kitaura Hiromasa Uchiyama Kazunori Kadota Yuichi Tozuka 《Advanced Powder Technology》2021,32(5):1750-1756
Although curcumin is considered to have various therapeutic effects, its use as a functional food or supplement is restricted owing to its low water solubility and bioavailability. To increase the solubility of curcumin in water, the use of polyvinylpyrrolidone (PVP) and vinylpyrrolidone-vinyl acetate copolymers with a pyrrolidone skeleton was noted to be promising. In particular, the bi-component formulations of curcumin/PVP prepared through spray drying exhibited an amorphous state in powder X-ray diffraction observations and temporally increased the apparent solubility of curcumin to over 5000 times that of untreated curcumin; nevertheless, after 24 h, the solubility decreased owing to the unstable supersaturated state of curcumin. The addition of α-cyclodextrin (α-CyD) in the bi-component curcumin/PVP formulation helped maintain the supersaturated state of curcumin, whereas the addition of β- and γ-CyD led to the collapse of the supersaturated state. The addition of α-CyD can likely help inhibit the nucleation and crystal growth of curcumin, through the interaction among the solubilized units of curcumin/PVP and α-CyD. 相似文献
14.
大别山是全国著名的革命老区,地处中原,拥有良好的“红色”和“绿色”旅游资源。随着我国经济的快速发展以及区域旅游市场的形成,大别山旅游业发展面临着空前的机遇与挑战。旅游业是一项复合产业,是一项关联性极强的系统工程。它可以为山区带来大量的人流、物流、资金流和信息流,通过旅游发展带动其他产业,最终实现大别山地区整体经济的发展。本文以河南新县为视点,对大别山地区“红”、“绿”旅游资源进行了近域市场的区域对比,并提出了大别山区“红”、“绿”旅游资源的开发方向和策略。 相似文献
15.
16.
煤矿安全生产状况与行业的经济技术发展水平密切相关。对煤矿安全生产状况的变化趋势进行分析,用数理统计分析方法建立煤矿死亡人数、百万吨死亡率与煤炭行业经济技术发展水平之间的关系模型,揭示其内在规律,提出改进煤矿安全生产措施和建议。 相似文献
17.
ZHOU Shao-hui NI Hai-yong HUANG Zhao-hui LI Xu-bo DING Jian-hong ZHANG Zhen 《材料研究与应用》2005,(3):599-603
Under reduction atmosphere, a blue sky rare earth silicate light storage and emission material was prepared by high temperature solid phase synthesis. The best constituent ratio of this material was determined through orthogonal experiment, and its excitation and emission spectra and X-ray diffraction patterns were measured. And a comparative study was conducted on its application properties. 相似文献
18.
浦东机场跑道冲击碾压地基处理试验研究 总被引:4,自引:0,他引:4
苏尔好 《探矿工程(岩土钻掘工程)》2006,33(12):9-13
针对浦东机场跑道系统的地质条件,提出了“井点降水+垫层+冲击碾压”地基处理试验方案,在试验过程中进行了监测和检测,对试验数据进行了分析,为大面积地基处理设计、施工和检测标准的制定提供了直接依据。 相似文献
19.
我国西部地质环境的基本特征及存在的主要问题。提出西部地质环境保护的主要对策 ;立法和建立四级地法环境监测体系 ,增加投入、部门关系和落实规划措施 ;开展区域性环境地质调查 ;加强地质环境有关的数据集成及科研与地质灾害的综合整治 相似文献
20.
结合矿产资源形势分析与预测的基本理论,综合介绍了目前比较流行的几种分析与预测的方法,旨在为政府和企业提供预测方法和决策依据,以促进资源的合理开发和利用。 相似文献