共查询到10条相似文献，搜索用时 109 毫秒
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研究核心专利的定义和特征,比较现有核心专利判别方法的优缺点,通过应用文献计量、专家评分和案例研究等方法,设计一种从大量专利文献中判别核心专利技术的方法,设定多个专利指标,并通过层次分析法综合多个指标构建成一个核心专利判别指标体系,并通过实例应用于风力发电产业技术领域,判定风力发电控制领域核心专利技术,为我国企业创新发展提供一些借鉴。 相似文献
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[目的/意义]核心专利的发现是技术创新的重要环节,对于技术改进和专利战略布局意义重大。[方法/过程]首先界定核心专利的概念,然后在对原始PageRank算法模型介绍的基础上,结合专利的被引次数和专利的年龄对原始的PageRank算法进行改进,提出PatentRank算法（简称PTR）,并将其应用到OLED领域中来识别核心专利。[结果/结论]研究发现,相比被引次数,PTR不仅能将该领域的核心专利识别出来,而且还可以识别出一些重要性的基础性专利,为研究OLED相关技术提供追本溯源的研究思路;相比原始PageRank算法,PTR具有更高的值区分度,在局部改善了PR的排名。 相似文献
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文章旨在再验证专利被引证数作为评估专利价值指标的准确性,并结合专利引文进行深入剖析。利用美国专利数据库检索中置式电动车电控辅助装置、亲水性医用脱脂纱布、军用紧急绷带技术领域的专利,统计专利的被引证数,并采用专家评估结果加以比较。研究结果表明:仅有中置式电动车电控辅助装置专利,专家评估与被引证数指标评估的结果一致;而专利被引证次数因受时间因素影响,早期专利的被引证数较高,但不一定是高价值的专利;存在一些很少被引用,但根据专家评估原则及专利本身具备的特征,被评估为高价值的专利,即可能存在睡美人专利现象。对专利价值评估,不能仅从专利被引证数指标判断,还可应用其他评价方法,更客观反映专利价值,减少专利评价过程中可能存在的风险,以保护企业的技术创新。 相似文献
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《Journal of Informetrics》2023,17(3):101435
How do scientific knowledge and technological knowledge interact to influence patent inventions? This study combines the “Reliance on Science in Patenting” dataset with the PATSTAT database to investigate focal patents and their paper references and patent references. A temporal investigation shows a growing tendency that patents absorb more knowledge from patents than papers. Additionally, we conduct two sets of analyses, namely, studying the knowledge flow among 35 technology fields and 39 science fields and estimating the impact of cited references on patent impact. The results show that the fields are heterogeneous in absorbing scientific knowledge and technological knowledge. The empirical models indicate that the knowledge depth of both science and technology show an inverted U-shaped relationship with patent impact, while the curve of former is steeper. The knowledge breadth of both science and technology present a U-shaped relationship with patent impact, while the curve of latter is steeper. We also explore the impact of time lags and time spread on citations and estimate their joint effects. Our study provides a new understanding of the convergence of scientific knowledge and technological knowledge to facilitate patent inventions. 相似文献
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《Journal of Informetrics》2022,16(2):101286
Although the incidence of knowledge exploration is observed in most patents, the concept of knowledge exploration distance has been analyzed with limited patents at the macro level of a company, organization or region. This study quantifies the knowledge exploration distance of individual patents using network embedding methods and citation analysis. First, a technology ecology network is constructed to identify technological association relationships between technical elements. Second, network embedding method is employed to represent technical elements as fixed dimensional vector, preserving the structural information. Next, the individual patents are vectorized based on the technology classification code information and pre-trained embedding values. Finally, by comparing the position between a citing patent and cited patents in the vector space, the knowledge exploration distance of the patent is obtained. This knowledge exploration distance indicates the novel degree of technological association between technical elements of a citing patent and those of cited patents. The case study covering artificial intelligence technology-related patents is conducted to illustrate the process of calculating knowledge exploration distance. Besides, this study showed that the proposed measure has significant relationships with patent-based indicators related to protection coverage, prior knowledge, and patent value. 相似文献
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[目的/意义]研究时间因素对专利被引频次的影响,可以减少时间因素对技术评价活动的制约,提高评价的准确性和可信度。[方法/过程]采集1975-2017年的美国专利数据,开展基于固定效应法的专利被引频次的修正研究。将专利按照不同公开年份和不同技术领域分组,选定组内均值和6个TOP分位数为被引频次基准,统计当前时间点的被引频次基准线及基准线的历史时序变化情况。建立神经网络模型,拟合基准线的时序变化规律,并预测未来统计时间点的基准线。[结果/结论]专利公开年份和统计年份的时间差异,使得专利被引频次无法直接进行比较。本文建立了基于不同技术领域、不同公开年份和不同统计年份的专利被引频次基准线,为专利评估提供参考。 相似文献
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《Journal of Informetrics》2020,14(4):101074
Demonstrating the practical value of public research has been an important subject in science policy. Here we present a detailed study on the evolution of the citation linkage between life science related patents and biomedical research over a 37-year period. Our analysis relies on a newly-created dataset that systematically links millions of non-patent references to biomedical papers. We find a large disparity in the volume of citations to science among technology sectors, with biotechnology and drug patents dominating it. The linkage has been growing exponentially over a long period of time, doubling every 2.9 years. The U.S. has been the largest producer of cited science for years, receiving nearly half of the citations. More than half of citations goes to universities. We use a new paper-level indicator to quantify to what extent a paper is basic research or clinical medicine. We find that the cited papers are likely to be basic research, yet a significant portion of papers cited in patents that are related to FDA-approved drugs are clinical research. The U.S. National Institute of Health continues to be an important funder of cited science. For the majority of companies, more than half of citations in their patents are authored by public research. Taken together, these results indicate a continuous linkage of public science to private sector inventions. 相似文献
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Qing Ke 《Journal of Informetrics》2018,12(3):706-717
Traditionally, the number of citations that a scholarly paper receives from other papers is used as the proxy of its scientific impact. Yet citations can come from domains outside the scientific community, and one such example is through patented technologies—paper can be cited by patents, achieving technological impact. While the scientific impact of papers has been extensively studied, the technological aspect remains less known in the literature. Here we aim to fill this gap by presenting a comparative study on how 919 thousand biomedical papers are cited by U.S. patents and by other papers over time. We observe a positive correlation between citations from patents and from papers, but there is little overlap between the two domains in either the most cited papers, or papers with the most delayed recognition. We also find that the two types of citations exhibit distinct temporal variations, with patent citations lagging behind paper citations for a median of 6 years for the majority of papers. Our work contributes to the understanding of the technological impact of papers. 相似文献
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��[Purpose/significance] Patent is one of the most reliable sources of technical intelligence. By patent analysis, one can realize the mining and the utilization of patent information, and the technology innovation. Technological evolution analysis refers to the process of emergence, development, transfer, change and even annihilation of technology themes. The focus of the current research is to deeply reveal the patent technology information, technical elements are the key to deeply reveal patent technology information.[Method/process] Proposing a method for identifying technical elements based on patent documents for specific fields by analyzing typical patents and feature recognition.[Result/conclusion] Applying our methods to the nano fertilizer field, through the analysis of typical patents, five technical elements are identified:materials, products, methods, functions and usage, and the identification of technical elements is completed based on SAO structure and domain vocabulary. Our methods can serve as a foundation for technological evolution analysis, and display field technical information from multiple perspectives. 相似文献
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[目的/意义] 论文引用专利的“反向引用”也是科学与技术知识关联的重要体现。针对现有“反向引用”研究的不足,分析中国专利技术对世界科学研究的影响。[方法/过程] 搜集整理中国专利被世界科学论文引用的数据,利用文献计量学方法分析“反向引用”的引用频数、技术关联度、引用时滞及技术循环周期等指标,利用社会网络分析方法构建“反向引用”网络,探讨技术领域到科学领域的知识流动情况。[结果/结论] 中国专利技术对世界科学研究的影响力越来越大。科学与技术的双向互动在化学领域体现的最为明显,化学、工程、材料科学三个学科领域较多地吸收了专利知识,技术关联度较高。前1-4年的技术对当前科学影响最大,中国专利被科学文献引用的循环周期较短,平均为4.69年。 相似文献