Collective prompt tuning with relation inference for document-level relation extraction     

《Information processing & management》2023,60(5):103451

Document-level relation extraction (RE) aims to extract the relation of entities that may be across sentences. Existing methods mainly rely on two types of techniques: Pre-trained language models (PLMs) and reasoning skills. Although various reasoning methods have been proposed, how to elicit learnt factual knowledge from PLMs for better reasoning ability has not yet been explored. In this paper, we propose a novel Collective Prompt Tuning with Relation Inference (CPT-RI) for Document-level RE, that improves upon existing models from two aspects. First, considering the long input and various templates, we adopt a collective prompt tuning method, which is an update-and-reuse strategy. A generic prompt is first encoded and then updated with exact entity pairs for relation-specific prompts. Second, we introduce a relation inference module to conduct global reasoning overall relation prompts via constrained semantic segmentation. Extensive experiments on two publicly available benchmark datasets demonstrate the effectiveness of our proposed CPT-RI as compared to the baseline model (ATLOP (Zhou et al., 2021)), which improve the 0.57% on the DocRED dataset, 2.20% on the CDR dataset, and 2.30 on the GDA dataset in the F1 score. In addition, further ablation studies also verify the effects of the collective prompt tuning and relation inference.  相似文献   

适应“昆明—蒙特利尔全球生物多样性框架”目标的中国海洋保护区政策研究          下载免费PDF全文

段克  王修林 《中国科学院院刊》2023,38(8):1154-1167

联合国《生物多样性公约》缔约方大会第十五次会议（COP15）通过了“昆明—蒙特利尔全球生物多样性框架”,确定了2030年保护30%海洋的系列目标,我国海洋生态文明建设如何与框架目标协同增效成为重要议题。文章从适应国际趋势、履行国际公约责任、维护海洋权益和落实海洋强国战略等方面分析了我国加快推进海洋保护区建设的必要性,从国家资金保障、政策支持和海洋综合实力支撑等方面探讨了可行性。总结梳理了我国海洋保护区规模小、发展慢、与国际差距大,管理理念上以陆管海、未实施陆海分类管理,管理体制不完善、技术标准落后等问题,以问题为导向,提出完善海洋保护区管理体制、优化整合近海保护区、推进南海国家公园建设、关注全球海洋保护治理等对策建议。  相似文献   

Proving the proverbial gadfly: situating the historical and racial context of Southern medical works by Mary Louise Marshall     

Aidy Weeks 《Journal of the Medical Library Association》2021,109(4):528

Health sciences librarianship has historically benefited from avoiding critical conversations around the role of race in the profession, reflected through a select few number of articles on the topic. The purpose of this study was to add to this body of literature and apply a critical librarianship framework on the early scholarly record of health sciences librarianship and the legacy of integration within the Medical Library Association (MLA). Three Southern medical works and the integration views of Mary Louise Marshall, the longest-serving president of MLA from 1941 to 1946, were thematically and textually analyzed to redress the profession''s long-standing legacy with Whiteness and Black, Indigenous, and People of Color (BIPOC) representation. In reframing the historic past of MLA both through Marshall''s works and her views, the goal is to acknowledge ways in which the profession has impeded progress and present steps to remedy appropriate outreach for the future.  相似文献   

1961年至2007年全球粮食生产的时空演变特征与地域格局   总被引：3，自引：1，他引：2  

赵霞  封志明  杨艳昭 《资源科学》2010,32(5):907-916

通过对全球近50年来分析的粮食总产、单产、播种面积、人均产量等指标的深入剖析,定量揭示了全球粮食生产的时空格局及其演变特征。分析结果表明,全球粮食生产格局具有明显的时间波动性和空间集中性特征。从时间格局上看,全球粮食生产自20世纪80年代中期以后增速明显减慢,特别是进入90年代以后,粮食总产波动明显,主要原因是同期发达国家粮食播种面积持续减少和发展中国家粮食单产增速减缓。从空间格局上看,全球粮食生产具有明显的地区差异性和空间集中性,主要生产国集中在亚洲和北美洲,欧洲曾是世界粮食主要生产地区,但进入20世纪90年代以来,主要生产国粮食产量下降趋势明显;非洲和大洋洲历来是粮食生产最少的区域,其中非洲地区的粮食总产近年来呈稳定上升趋势,而大洋洲的澳大利亚的粮食生产则具有明显的波动性特点。从地区差距上看,发达国家和发展中国家之间的粮食单产和人均产量差异明显,二者之间的绝对差距呈扩大趋势。上述结果表明,巨大的时空格局差异不仅是造成区域粮食供求形势紧张的根源,也是引发全球粮食粮食危机的重要原因。  相似文献   

塔克拉玛干沙漠腹地太阳紫外辐射特征   总被引：1，自引：0，他引：1  

何清  金莉莉  李帅  艾力·买买提明  杨兴华  李振杰 《资源科学》2010,32(8):1462-1470

本文利用塔克拉玛干沙漠腹地(塔中站:83°40'E,39°01'N)2007年1月-12月紫外辐射和总辐射的观测资料,分析了塔克拉玛干沙漠腹地太阳紫外辐射的气候学特征。结果表明:①本地区太阳紫外辐射年总量为305.64MJ(/m2·a)。年平均日总量为0.84MJ/m2,大于黑河、太湖和青藏高原地区。紫外辐射年平均值在总辐射年平均值中所占比例为4.99%,小于太湖和北京,大于黑河地区和五道梁,月平均日总量7月最大;②其日变化,晴天呈现出标准的倒"U"型,即早晚小、中午大,正午达到一天中的最大值;③紫外辐射受云量、降水和沙尘的影响很大;④紫外辐射在总辐射中所占比例有明显的年、季节和日变化,其年变化分为三个明显不同的阶段,夏季大,冬季小。青藏高原地区春夏大,冬季小,北京地区和黑河地区相近,分别是冬季大,夏季小和冬季大,春夏小。  相似文献   

Global health social technologies: Reflections on evolving theories and landscapes     

Joanna Chataway  Rebecca Hanlin  Julius Mugwagwa  Lois Muraguri 《Research Policy》2010,39(10):1277-1288

This paper has two core purposes. First, building on Nelson and Sampat's work, we outline the social technology conceptual framework and explain why we favour using it to explore two global health initiatives. Second, we discuss the evolution of those initiatives through the lens of the interaction between social technologies, physical technologies and general institutions. Thus we reflect both on evolving conceptual landscapes on the one hand and organisational and institutional terrains on the other.The first section of the paper presents an intellectual journey and outlines our understanding and adoption of the social technology conceptual framework. This framework we argue has a number of advantages over alternative theoretical approaches and perspectives. The second section describes the context in which product development partnerships (PDPs), a type of global health initiative based on a public–private partnership (PPP), have arisen. The third section develops case studies of the International AIDS Vaccine Initiative (IAVI) and the Malaria Vaccines Initiative (MVI) as social technology experiments and looks at the complex dynamics between organisation, management, scientific and R&D success and general institutional environments. We look at these social technologies as having ‘integrator’ and ‘broker’ roles; classifications which we argue are useful in analysing the different roles taken on by these PDPs. In the conclusion we reflect on the useful ways in which the concept of social technologies can shed light on complex and networked initiatives.  相似文献   

Existence and global exponential stability of a periodic solution for a discrete-time interval general BAM neural networks     

Zhengqiu Zhang  Dongming Zhou 《Journal of The Franklin Institute》2010,347(5):763-780

In this paper, a discrete-time interval general BAM bidirectional associative memory neural networks model is considered. By employing the theory of coincidence degree and using Halanay-type inequality technique we establish new sufficient conditions ensuring the existence and global exponential stability of periodic solutions for the discrete-time interval general BAM bidirectional neural networks. The results obtained generalize and improve known results in [23]. An example is provided to show the correctness of our analysis.  相似文献   

近十五年内国内全球气候治理研究的知识图谱 ——基于CiteSpace的信息可视化分析     

王硕  王海荣 《科技管理研究》2022,(15)

随着全球气候治理议题逐渐占据世界外交的中心视野，中国学者在政策导向下对其研究比例跃升。以CNKI数据库所收录2006—2021年有关“全球气候治理”主题的337篇CSSCI期刊文献为样本，借助CiteSpace软件为工具绘制知识图谱,直观分析国内全球气候治理研究的现状、热点及趋势。经分析，可知国内对全球气候治理的研究在十九大之后出现爆发式增长；国际政治学领域的学者、期刊和机构组成了主体支持力量；全球气候治理的困境及原因、中国在全球气候治理体系中的角色转变以及实现双碳目标的路径等是主要热点议题；“双碳”主题下的碳交易机制复杂化、数字碳中和以及新时代碳外交等子议题是未来发展趋势。  相似文献   

Qualitative methods to assess intercultural competence in higher education research: A systematic review with practical implications     

《Educational Research Review》2022

A number of methods have been recorded in the literature with regard to assessing intercultural competence, but extant reviews tend to focus on self-report instruments in which students' responses can be easily quantified. To address the gap, this paper provides an overview of qualitative methods used to assess students' intercultural competence in higher education research. Based on 34 studies, 25 qualitative assessment methods have been identified and captured in a newly-developed typology. Results show that (1) the majority of qualitative methods to assess intercultural competence were writing-based and ‘expressive’ in nature; (2) the assessment results were mainly analysed in a ‘thematic’ or ‘scalar’ manner; and (3) very little assessment took place among STEM majors. These results are further discussed and problematized to provide implications for developing and assessing intercultural competence in higher education research and curriculum.  相似文献   

制造业数字化对其全球价值链地位升级的影响---基于广东制造业细分行业的实证分析     

李松庆  胡志菊 《科技管理研究》2022,(23)

数字经济的蓬勃发展,给中国制造业转型升级提供了契机。根据广东省2010-2017年16个制造行业的面板数据,本文分析了制造业数字化对其全球价值链地位升级的影响及作用机制。研究表明,制造业数字化对提升其全球价值链地位有正向促进作用,且主要通过推动产业结构升级和提高制造业生产率两个渠道实现对其全球价值链地位的升级。行业异质性研究显示,制造业数字化能显著促进劳动密集型和资本密集型制造业的全球价值链地位升级,但由于核心技术缺失,对技术密集型制造业的促进效果不明显。因此,应持续推进制造业数字化发展,促进其全球价值链地位提升；加快数字化基础设施建设,夯实制造业数字化转型基础；劳动密集型、资本密集型、技术密集型等不同类型制造业要因地制宜制定数字化发展措施；完善信贷、财税、数字知识产权和网络信息安全保护、数字化人才培养等相关政策制度,加大企业数字化转型支持力度。  相似文献