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11.
系统动力学作为一个研究复杂反馈系统的研究领域,在20世纪80年代以后得到了较为广泛的传播和较快发展。以美国科学引文索引数据库扩展版(SCI-Expanded)和社会科学引文索引数据库(SSCI)收录发表于1981—2011年间的976篇系统动力学论文为研究对象,对这些论文的产出规模、地域分布、学科分布、知识基础等方面进行了计量分析。结果显示,30余年来,全球系统动力学成果产出逐渐丰富,理论研究与应用研究得到积极推进,与众多学科联系紧密,各国科研投入力量在不断加强,同时也反映出,美国系统动力学研究在全球一枝独秀。  相似文献   
12.
祈使句一直以来都被认为是威胁面子的一种言语行为,在语篇中会影响作者和读者的人际关系。然而,科研论文中祈使句的使用是作者有意识的一种语言策略选择,体现出作者不同程度的元语用意识,实现不同的元语用功能。  相似文献   
13.
It has been argued that the scientific status of the marketing discipline is reflected in both the ability of its articles to be cited and the degree to which its articles draw from a diverse set of reference sources. We combine a content analysis of a sample of 561 JM, JMR, and JCR articles with a citation analysis and reference analysis of those same articles to investigate the impact of article method type and subject area on article citation rates and reference diversity. Our results reveal that verbal-theory and field study papers are both more likely to be cited and more likely to draw from a wide variety of journal and disciplinary reference sources. The results also reveal that services/customer satisfaction and general theory and philosophy of science articles are generally more likely to be cited than other subject areas, although services/customer satisfaction articles are also less likely to rely on a diverse set of references.  相似文献   
14.
对《刘子》中所涉猎的文艺范畴“名实”“言理”“情性”“声乐”“评赏”,从“名”“实”辨、“性”“情”辨、“声”“乐”辨、“赏”“评”辨等四个方面进行深入分析,从而解读它的文学本质论、创作观和批评观。  相似文献   
15.
Interpretative qualitative social science has attempted to distinguish itself from quantitative social science by rejecting traditional or ‘received’ notions of generalization. Traditional concepts of scientific generalization it is claimed are based on a misguided objectivism as to the mechanisms operating in the social world, and particularly the ability of statements to capture such mechanisms in any abstract sense. Instead they propose new versions of the generalizability concept e.g. ‘transferability’, which relies on the context dependent judgement of ‘fit’ between two or more cases instances made by a researcher. This paper argues that the transferability concept, as outlined and argued by interpretativist methodologists, is thoroughly coextensive with notions of generalizability formalized for natural science and naturalistic social science by philosophers and methodologists of science. Therefore, it may be concluded that the interpretativist claim to a break with received scientific traditions is a premature one, at least with regard to the issue of generalization.  相似文献   
16.
《Journal of Retailing》2021,97(3):394-404
In this paper, we use a series of experimental studies to show that consumers’ response to the extension of a brand associated with a basic versus a sub-category depends on the closeness of the brand's parent and extension categories. When the two categories are close, consumers respond more favorably to the extension of a brand with a basic category concept, but the pattern reverses when the categories are far apart. However, a brand with a basic category concept can mitigate its disadvantage in a distant category by first launching an intervening line extension. Our results suggest that brands with sub-category concepts are not limited in their ability to extend, and can help retailers meet the twin objectives of leveraging the high growth of specialized categories and rationalizing their brand portfolio. They also suggest that managers should aim to extend brands with sub-category concepts into distant categories where the modifier in the brand concept is relevant rather than into close categories.  相似文献   
17.
文章援引GATT第20条豁免条款经典案例,将碳关税合法性纳入WTO争端解决机制"两步走"审核程序。通过剖析争端解决机制对案例的裁决,认为碳关税满足GATT第20条(g)款,同时通过与多边国家协商制定多方认可的碳关税征收的无歧视标准,可通过GATT第20条前言的要求,从而认为碳关税征收满足GATT第20条豁免条款,案例折射出WTO争端解决机制对可耗竭自然资源保护措施的态度由承认其重要性、到肯定再到鼓励,都增加了碳关税征收的可能性。  相似文献   
18.
The performance of firms depends not just on the structure of the industries in which they compete but also on their relative positioning within those industries, in terms of operating within particular niches. We propose that demand for these niches depends endogenously on the historical ecology of the products offered: Niches become saturated—reduced in their ability to support products—as a large number of previous offerings allows the audience to satisfy its desire for products of a particular type. Analyzing the survival rates of television series aired in the United States from 1946 to 2003, we found that the survival rates of future entrants fell with the extensiveness of recent offerings in the niche, and that the negative association between crowding and survival also weakened with this saturation. Copyright © 2014 John Wiley & Sons, Ltd.  相似文献   
19.
In a hierarchy of project objectives, strategic objectives will often be principally different from the operational ones. Operational objectives concern the project outputs/results, and strategic objectives concern the project goal and purpose. In this study, risks are categorized as risks to operational, long‐term, or short‐term strategic objectives, and, by studying a dataset of some 1,450 risk elements that make up the risk registers of seven large projects, we examine how operational and strategic risks are distributed in the projects. The study strongly indicates that risks to a project's strategic objectives rarely occur in the project's risk registers, though project success and failure stories indicate their importance.  相似文献   
20.
王泽龙 《价值工程》2010,29(9):93-93
地下洞室围岩分类是评价地下洞室围岩稳定性的基础,也是地下工程规划选点、可行性评估、加固设计、工程造价、定额预算及工程施工的重要依据。本文介绍了我国水利水电地下洞室围岩分类的常用方法、分类目的、分类特点,以及水利水电地下洞室围岩分类存在的主要问题及发展方向。  相似文献   
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