全文获取类型
收费全文 | 1547篇 |
免费 | 54篇 |
国内免费 | 2篇 |
专业分类
电工技术 | 15篇 |
综合类 | 1篇 |
化学工业 | 403篇 |
金属工艺 | 52篇 |
机械仪表 | 31篇 |
建筑科学 | 64篇 |
矿业工程 | 2篇 |
能源动力 | 55篇 |
轻工业 | 180篇 |
水利工程 | 6篇 |
无线电 | 154篇 |
一般工业技术 | 302篇 |
冶金工业 | 119篇 |
原子能技术 | 10篇 |
自动化技术 | 209篇 |
出版年
2024年 | 3篇 |
2023年 | 10篇 |
2022年 | 30篇 |
2021年 | 54篇 |
2020年 | 25篇 |
2019年 | 26篇 |
2018年 | 27篇 |
2017年 | 22篇 |
2016年 | 34篇 |
2015年 | 27篇 |
2014年 | 54篇 |
2013年 | 118篇 |
2012年 | 84篇 |
2011年 | 136篇 |
2010年 | 101篇 |
2009年 | 87篇 |
2008年 | 84篇 |
2007年 | 65篇 |
2006年 | 71篇 |
2005年 | 51篇 |
2004年 | 41篇 |
2003年 | 46篇 |
2002年 | 38篇 |
2001年 | 22篇 |
2000年 | 20篇 |
1999年 | 23篇 |
1998年 | 29篇 |
1997年 | 48篇 |
1996年 | 23篇 |
1995年 | 28篇 |
1994年 | 20篇 |
1993年 | 17篇 |
1992年 | 12篇 |
1991年 | 14篇 |
1990年 | 5篇 |
1989年 | 12篇 |
1988年 | 5篇 |
1987年 | 14篇 |
1986年 | 4篇 |
1985年 | 11篇 |
1984年 | 6篇 |
1983年 | 5篇 |
1982年 | 5篇 |
1981年 | 5篇 |
1980年 | 6篇 |
1979年 | 9篇 |
1978年 | 9篇 |
1977年 | 3篇 |
1976年 | 4篇 |
1973年 | 3篇 |
排序方式: 共有1603条查询结果,搜索用时 15 毫秒
101.
102.
Wie müsste ein ideales und globales Internet-Frühwarnsystem aussehen? Der Beitrag stellt ein Modell für ein Frühwarnsystem vor und führt aus, welche Komponenten dafür ben?tigt werden und warum eine Frühwarnung nur durch kollaborative Ans?tze und eine Vielzahl von Systemen funktionieren kann. Anschlie?end werden einige aktuelle Forschungsvorarbeiten im Bereich Internet-Frühwarnung skizziert. 相似文献
103.
A sensitive and specific assay for recombinant interleukin-2 (rIL-2) in human serum is described. The assay is based on a sequential sandwich immunobioassay that uses a microtiter plate coated with anti-rIL-2 monoclonal antibody (specific for recombinant human IL-2) to capture rIL-2 from serum, and an IL-2 dependent T-cell line that proliferates in a dose-dependent fashion. The lower limit of quantitation of the assay is 2 units/mL (1 unit = approximately 50 pg) using 0.1 mL of serum and the calibration curves ranged from 2 to 50 units/mL. Data are reported on the sensitivity, precision, reproducibility, and specificity of the assay; the stability of rIL-2 in serum; and the recovery of rIL-2 from serum. We also report on the use of the procedure to assay clinical samples from patients with AIDS undergoing treatment with rIL-2. 相似文献
104.
Gamache Jean-François Vadean Aurelian Noirot-Nérin Émeric Beaini Dominique Achiche Sofiane 《Structural and Multidisciplinary Optimization》2018,58(6):2697-2709
Structural and Multidisciplinary Optimization - Topology optimization is a tool that supports the creativity of structural-designers and is used in various industries, from automotive to... 相似文献
105.
Agnès Front Dominique Rieu Marco Santorum Fatemeh Movahedian 《Software and Systems Modeling》2017,16(3):691-714
A business process can be characterized by multiple perspectives (intentional, organizational, operational, functional, interactional, informational, etc). Business process modeling must allow different stakeholders to analyze and represent process models according to these different perspectives. This representation is traditionally built using classical data acquisition methods together with a process representation language such as BPMN or UML. These techniques and specialized languages can easily become hard, complex and time consuming. In this paper, we propose ISEA, a participative end-user modeling approach that allows the stakeholders in a business process to collaborate together in a simple way to communicate and improve the business process elicitation in an accurate and understandable manner. Our approach covers the organizational perspective of business processes, exploits the information compiled during the elicitation of the organizational perspective and touches lightly an interactional perspective allowing users to create customized interface sketches to test the user interface navigability and the coherence within the processes. Thus, ISEA can be seen as a participative end-user modeling approach for business process elicitation and improvement. 相似文献
106.
Bart Goethals Dominique Laurent Wim Le Page Cheikh Tidiane Dieng 《Knowledge and Information Systems》2012,33(3):655-684
We present an approach for mining frequent conjunctive in arbitrary relational databases. Our pattern class is the simple, but appealing subclass of simple conjunctive queries. Our algorithm, called Conqueror $^+$ , is capable of detecting previously unknown functional and inclusion dependencies that hold on the database relations as well as on joins of relations. These newly detected dependencies are then used to prune redundant queries. We propose an efficient database-oriented implementation of our algorithm using SQL and provide several promising experimental results. 相似文献
107.
108.
109.
110.
Selsabil?El-Ghezal JeguirimEmail author Amal?Babay?Dhouib Mahdi?Sahnoun Morched?Cheikhrouhou Laurence?Schacher Dominique?Adolphe 《Journal of Intelligent Manufacturing》2011,22(6):873-884
In a competitive business environment, the textile industrialists intend to propose diversified products according to consumers
preference. For this purpose, the integration of sensory attributes in the process parameters choice seems to be a useful
alternative. This paper provides fuzzy and neural models for the prediction of sensory properties from production parameters
of knitted fabrics. The prediction accuracy of these models was evaluated using both the root mean square error (RMSE) and
mean relative percent error (MRPE). The results revealed the models ability to predict tactile sensory attributes based on
the production parameters. The comparison of the prediction performances showed that the neural models are slightly powerful
than the fuzzy models. 相似文献