全文获取类型
收费全文 | 2064篇 |
免费 | 231篇 |
国内免费 | 209篇 |
专业分类
电工技术 | 16篇 |
技术理论 | 1篇 |
综合类 | 293篇 |
化学工业 | 18篇 |
金属工艺 | 2篇 |
机械仪表 | 30篇 |
建筑科学 | 364篇 |
矿业工程 | 3篇 |
能源动力 | 7篇 |
轻工业 | 46篇 |
水利工程 | 3篇 |
石油天然气 | 2篇 |
无线电 | 159篇 |
一般工业技术 | 103篇 |
冶金工业 | 365篇 |
自动化技术 | 1092篇 |
出版年
2024年 | 16篇 |
2023年 | 42篇 |
2022年 | 60篇 |
2021年 | 67篇 |
2020年 | 64篇 |
2019年 | 52篇 |
2018年 | 66篇 |
2017年 | 77篇 |
2016年 | 68篇 |
2015年 | 87篇 |
2014年 | 121篇 |
2013年 | 122篇 |
2012年 | 131篇 |
2011年 | 160篇 |
2010年 | 163篇 |
2009年 | 163篇 |
2008年 | 146篇 |
2007年 | 164篇 |
2006年 | 159篇 |
2005年 | 133篇 |
2004年 | 93篇 |
2003年 | 87篇 |
2002年 | 65篇 |
2001年 | 40篇 |
2000年 | 30篇 |
1999年 | 19篇 |
1998年 | 17篇 |
1997年 | 17篇 |
1996年 | 13篇 |
1995年 | 6篇 |
1994年 | 8篇 |
1993年 | 3篇 |
1992年 | 8篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1989年 | 4篇 |
1988年 | 2篇 |
1986年 | 6篇 |
1983年 | 2篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1975年 | 2篇 |
1974年 | 1篇 |
1973年 | 3篇 |
1972年 | 1篇 |
1968年 | 1篇 |
1963年 | 1篇 |
1960年 | 1篇 |
1959年 | 1篇 |
1954年 | 2篇 |
排序方式: 共有2504条查询结果,搜索用时 15 毫秒
71.
LIU Ya-li 《数字社区&智能家居》2008,(35)
概念格是知识处理与分析中的一个有力工具,对它进行约简可以提高效率简化问题。该文在协调决策形式背景下给出了协调集及属性特征的判定定理,并在此基础上得到了一种求属性约简的方法。 相似文献
72.
田鹏 《数码设计:surface》2008,(3):75-76
本文基于现代认知理论,从注重历史与文脉传承的角度,通过对涉及建筑设计各要素的深入分析,进一步揭示建筑设计中传统元素与现代元素和谐共生的相互关系和必要性,并为该领域相关问题的解决提供较为可行的理论依据。 相似文献
73.
Guoray Cai 《GeoInformatica》2007,11(2):217-237
Human interactions with geographical information are contextualized by problem-solving activities which endow meaning to geospatial
data and processing. However, existing spatial data models have not taken this aspect of semantics into account. This paper
extends spatial data semantics to include not only the contents and schemas, but also the contexts of their use. We specify
such a semantic model in terms of three related components: activity-centric context representation, contextualized ontology
space, and context mediated semantic exchange. Contextualization of spatial data semantics allows the same underlying data
to take multiple semantic forms, and disambiguate spatial concepts based on localized contexts. We demonstrate how such a
semantic model supports contextualized interpretation of vague spatial concepts during human–GIS interactions. We employ conversational
dialogue as the mechanism to perform collaborative diagnosis of context and to coordinate sharing of meaning across agents
and data sources.
相似文献
Guoray CaiEmail: |
74.
Question–answering systems make good use of knowledge bases (KBs, e.g., Wikipedia) for responding to definition queries. Typically, systems extract relevant facts from articles regarding the question across KBs, and then they are projected into the candidate answers. However, studies have shown that the performance of this kind of method suddenly drops, whenever KBs supply narrow coverage. This work describes a new approach to deal with this problem by constructing context models for scoring candidate answers, which are, more precisely, statistical n‐gram language models inferred from lexicalized dependency paths extracted from Wikipedia abstracts. Unlike state‐of‐the‐art approaches, context models are created by capturing the semantics of candidate answers (e.g., “novel,”“singer,”“coach,” and “city”). This work is extended by investigating the impact on context models of extra linguistic knowledge such as part‐of‐speech tagging and named‐entity recognition. Results showed the effectiveness of context models as n‐gram lexicalized dependency paths and promising context indicators for the presence of definitions in natural language texts. 相似文献
75.
I‐Ching Hsu 《Software》2012,42(10):1211-1227
Web 2.0 Mashups offer entirely new opportunities for context‐aware application (CAA) developers by integrating Web 2.0 technologies to facilitate interoperability among heterogeneous context‐aware systems. From a software engineering perspective, a visualized approach for Web 2.0‐based CAA modeling is crucial. Current CAA development, however, cannot provide a conceptual model for Web 2.0‐based CAA. Therefore, the development efficiency and potential for reuse are decreased. The UML is a general purpose modeling language with potential for use in many application domains. However, UML often lacks elements needed to model concepts in specific domains, such as Web 2.0‐based CAA modeling. To address the above issues, this study presents the Web 2.0‐based CAA UML profile, a UML profile for modeling Web 2.0‐based CAA. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
76.
刘彪 《湖南工业职业技术学院学报》2013,13(1):63-65
牛郎织女传说作为我国四大传说之一,在历史传承中发生了文化变迁,其影响日益式微。在当代语境下,后现代主义思潮的推动,新科技手段的应用,为牛郎织女传说的传承提供了新的机遇。本文拟就对牛郎织女历史语境及当代语境作出分析,同时对牛郎织女未来保护与传承进行构想与展望,思考牛郎织女传说的发展辙迹。 相似文献
77.
Jørgensen MB Faber A Jespersen T Hansen K Ektor-Andersen J Hansen JV Holtermann A Søgaard K 《Ergonomics》2012,55(7):762-772
This study evaluates the implementation of physical coordination training (PCT) and cognitive behavioural training (CBTr) interventions in a randomised controlled trial at nine cleaners' workplaces. Female cleaners (n = 294) were randomised into a PCT, a CBTr or a reference (REF) group. Both 12-week interventions were performed in groups guided by an instructor. Records were kept on intervention dose (adherence) unanticipated events at the work place (context) and quality of intervention delivery (fidelity). Participant adherence was 37% in the PCT and 49% in the CBTr interventions. Optimal implementation was reached by only 6% in PCT and 42% in the CBTr. Analysis of the barriers to successful implementation indicated that the intervention process is sensitive to unanticipated events. In order to succeed in improving the health of high-risk populations such as cleaners and to correctly interpret intervention effects, more research on implementation is needed. Trial registration: ISRCTN96241850. PRACTITIONER SUMMARY: Both physical coordination training and cognitive behavioural training are potential effective workplace interventions among low educated job groups with high physical work demands. However, thorough consideration should be given to feasibility in the design of interventions. The optimal intervention should be tailored to closely match the implementation context and be robust and flexible to minimise susceptibility to changes in work organisation. 相似文献
78.
徐振东 《杭州应用工程技术学院学报》2013,(4):285-288,304
作为四大名著之一的《西游记》脍炙人口,主角孙悟空被当作文学史中的重要人物而经历多次描摹与改写。作为艺术形式之一的动画片也经历了数十年的演变过程,在这个过程中,经历了传统语境到现代语境再到后现代语言的语境变化,孙悟空也经历了从神到人的角色定位变化,并且在古典戏剧到网络文学的流变中沉浮。分析各个时期孙悟空形象的异同,可以看出不同时期的社会思潮反映在艺术形象上的不同。 相似文献
79.
80.