从“暴力美学”视域审视武术散打运动     

连美雪  马剑 《中华武术(研究)》2020,(1):124-125,83

从“暴力美学”视角对武术散打进行审视与分析,在社会的现代化发展中,武术徒手格斗形式运动项目中的散打与暴力美学的结合表达了当前社会人们对格斗竞技类项目的态度与观点。散打运动中体现着暴力美学,外在展现的暴力动作实际上是内心世界的写照,同时也是观众内心情感的寄托宣泄。如今的社会,散打运动的独特魅力吸引着更多的人来认识它,攻防技击的本质是散打运动发展的基石,也是对它的准确定位。  相似文献   

The Program for Cooperative Cataloging’s Transformative Role as a Leader of Change     

Philip E. Schreur 《Cataloging & classification quarterly》2020,58(3-4):397-402

Abstract

The transformation of library metadata encoded in MARC to linked data will enable libraries to participate in the Semantic Web. This transformation, however, will be an iterative development dependent upon community-based decisions. The PCC, as a community-based organization, is ideally positioned to lead this transformation. As PCC guides this transition, three broad areas must be resolved: the conversion of legacy data to linked data, the use of identifiers to support controlled headings, and the transformation of current workflows to linked-data counterparts. By embracing the Web as a community, PCC can confirm its relevance in a complex web of global data.  相似文献   

集装化危险品物流作业风险因素识别与评价     

何景师  张智勇 《上海海事大学学报》2020,41(4):62-69

为识别与评价集装化危险品物流作业的风险因素，通过鱼骨图分析法构建风险因素评价指标体系。以风险发生的概率和后果为决策变量建立基于熵权 层次分析法（analytic hierarchy process, AHP）约束的数据包络分析(data envelopment analysis, DEA)法的风险评价模型。利用熵权 AHP解决传统DEA法的权重无限性问题，利用DEA法求解风险极大、极小值并对风险因素进行评价与排序。研究发现，人员风险、包装风险达到风险极大值，集装箱风险达到风险极小值。研究得到各风险因素决策单元的风险降低比例，并根据风险因素的特点提出集装化危险品物流作业风险管理的建议。结果表明了该评价模型的适用性和评价方法的科学性。  相似文献   

强磁场下液态金属在竖直平板外的自由对流换热     

周仲凯  王增辉  陈然 《中国科学院大学学报》2020,37(1):13-19

托克马克装置中面向等离子体部件在不同的位置存在很大的温差，导致面向等离子体部件表面液态金属产生自由对流。以此为背景，实验研究液态金属受横向磁场影响下竖直壁面上的自由对流换热规律。实验采用K型热电偶测量环境与壁面两侧的温度，利用多普勒超声波测速仪测量壁面上的液态金属速度，分析不同磁场强度和加热热流密度条件对竖直平板外表面的流动与换热影响规律。研究表明：竖直平板的局部换热系数与特征长度成反比，即距加热平板起始段越远换热越弱，同时增强加热功率使表面换热系数增加。在强磁场条件下，壁面边界层的流动与换热均普遍被抑制；但是在弱磁场下，增加磁场会强化平板表面的自由对流与换热，根据实验结果发现该转折点出现在磁相互作用数为1~4的范围。  相似文献   

Neural embedding-based indices for semantic search     

Fatemeh Lashkari  Ebrahim Bagheri  Ali A. Ghorbani 《Information processing & management》2019,56(3):733-755

Traditional information retrieval techniques that primarily rely on keyword-based linking of the query and document spaces face challenges such as the vocabulary mismatch problem where relevant documents to a given query might not be retrieved simply due to the use of different terminology for describing the same concepts. As such, semantic search techniques aim to address such limitations of keyword-based retrieval models by incorporating semantic information from standard knowledge bases such as Freebase and DBpedia. The literature has already shown that while the sole consideration of semantic information might not lead to improved retrieval performance over keyword-based search, their consideration enables the retrieval of a set of relevant documents that cannot be retrieved by keyword-based methods. As such, building indices that store and provide access to semantic information during the retrieval process is important. While the process for building and querying keyword-based indices is quite well understood, the incorporation of semantic information within search indices is still an open challenge. Existing work have proposed to build one unified index encompassing both textual and semantic information or to build separate yet integrated indices for each information type but they face limitations such as increased query process time. In this paper, we propose to use neural embeddings-based representations of term, semantic entity, semantic type and documents within the same embedding space to facilitate the development of a unified search index that would consist of these four information types. We perform experiments on standard and widely used document collections including Clueweb09-B and Robust04 to evaluate our proposed indexing strategy from both effectiveness and efficiency perspectives. Based on our experiments, we find that when neural embeddings are used to build inverted indices; hence relaxing the requirement to explicitly observe the posting list key in the indexed document: (a) retrieval efficiency will increase compared to a standard inverted index, hence reduces the index size and query processing time, and (b) while retrieval efficiency, which is the main objective of an efficient indexing mechanism improves using our proposed method, retrieval effectiveness also retains competitive performance compared to the baseline in terms of retrieving a reasonable number of relevant documents from the indexed corpus.  相似文献   

Rare-aware attention network for image–text matching     

《Information processing & management》2023,60(3):103280

Image and text matching bridges visual and textual modality differences and plays a considerable role in cross-modal retrieval. Much progress has been achieved through semantic representation and alignment. However, the distribution of multimedia data is severely unbalanced and contains many low-frequency occurrences, which are often ignored and cause performance degradation, i.e., the long-tail effect. In this work, we propose a novel rare-aware attention network (RAAN), which explores and exploits textual rare content for tackling the long-tail effect of image and text matching. Specifically, we first design a rare-aware mining module, which contains global prior information construction and rare fragment detector for modeling the characteristic of rare content. Then, the rare attention matching utilizes prior information as attention to guide the representation enhancement of rare content and introduces the rareness representation to strengthen the similarity calculation. Finally, we design prior information loss to optimize the model together with the triplet loss. We perform quantitative and qualitative experiments on two large-scale databases and achieve leading performance. In particular, we conduct 0-shot test for rare content and improve rSum by 21.0 and 41.5 on Flickr30K (155,000 image and text pairs) and MSCOCO (616,435 image and text pairs), demonstrating the effectiveness of the proposed method for the long-tail effect.  相似文献   

Social influence on endorsement in social Q&A community: Moderating effects of temporal and spatial factors     

《International Journal of Information Management》2021

This study examines the impacts of social influence, which are manifested by popularity and source credibility, on social endorsement in social Q&A community; and how the relationship is impacted by temporal-spatial factors. By collecting panel data from a large platform, the results of an econometric model demonstrate that popularity and source credibility are positively associated with social endorsement. With respect to the moderation effects, the results further show that time distance strengthens the effect of popularity on the social endorsement, but undermines the effect of source credibility; while crowdedness plays the role that strengthens the impact of popularity on the social endorsement, it has no significant moderating effect on the relationship between source credibility and social endorsement. Both theoretical and practical implications are discussed.  相似文献   

自由情感论   总被引：2，自引：0，他引：2  

马立新 《海南师范大学学报(社会科学版)》2011,24(5):29-33

人类存在着两类不同性质的情感：自由情感和必然情感。所谓自由情感指的是刺激源和这种情感对象之间没有任何直接的利害关系条件下所产生的情感。自由情感大部分属于纯粹的精神或者心理层面,只是一种心理体验。所谓必然情感则指的是刺激源和情感对象之间存在着明显的功利关系或所属关系条件下所产生的情感。这些刺激源或者能直接带给刺激对象直接的好处或害处,这类刺激源多半是外在的客体;或者本身就隶属于情感对象的一部分生理机能,它们主要指那些内在的自然的生命欲求。所以必然情感实质上是～种因果性情感或者功利性情感。一般地说,现实中的绝大部分爱情、亲情和友情都属于,必然情感,而以自由情感方式存在的爱情、亲情和友情则是现实中的稀缺资源。不过这一缺憾因为艺术品的存在而得以弥补。艺术品虽非天然的审美客体,然而,在同等条件下,艺术品较之其他审美客体更容易引发审美主体的自由情感,因为艺术品跟审美主体之间最缺乏明显的实际利害关系。  相似文献   

高校信息检索课教学模式研究     

高稳潮 《河北职业技术学院学报》2004,4(2):31-32

信息时代的高校信息检索课应明确课程特点，构造网络同步操作环境，改革教学内容与考核方法，提高教师素质，以适应时代的要求。  相似文献   

后现代主义与实践美学的回答     

张玉能 《华中师范大学学报(人文社会科学版)》2002,41(1):43-52

面对后现代主义美学的“重写现代性”所倡导的消解理性、主体性及其意义异延论（解构美学），社会差异论（生存美学），语言游戏论（解释学美学），非主体可能论（崇高美学），实践美学从以物质生产为中心的社会实践出发，力图建构起人文理性、多维主体性、自由个体性、回应西方现代美学的不确定性、多元化、非人化、语言学转向等问题和趋向，开辟新世纪美学发展的康庄大道。  相似文献