全文获取类型
收费全文 | 497篇 |
免费 | 27篇 |
专业分类
电工技术 | 3篇 |
化学工业 | 144篇 |
金属工艺 | 7篇 |
机械仪表 | 8篇 |
建筑科学 | 30篇 |
矿业工程 | 2篇 |
能源动力 | 12篇 |
轻工业 | 77篇 |
石油天然气 | 2篇 |
无线电 | 18篇 |
一般工业技术 | 71篇 |
冶金工业 | 72篇 |
自动化技术 | 78篇 |
出版年
2023年 | 5篇 |
2022年 | 27篇 |
2021年 | 28篇 |
2020年 | 15篇 |
2019年 | 17篇 |
2018年 | 23篇 |
2017年 | 11篇 |
2016年 | 17篇 |
2015年 | 10篇 |
2014年 | 19篇 |
2013年 | 34篇 |
2012年 | 19篇 |
2011年 | 35篇 |
2010年 | 28篇 |
2009年 | 21篇 |
2008年 | 29篇 |
2007年 | 26篇 |
2006年 | 11篇 |
2005年 | 17篇 |
2004年 | 16篇 |
2003年 | 17篇 |
2002年 | 7篇 |
2001年 | 9篇 |
2000年 | 7篇 |
1999年 | 11篇 |
1998年 | 3篇 |
1997年 | 7篇 |
1996年 | 3篇 |
1995年 | 4篇 |
1994年 | 3篇 |
1993年 | 6篇 |
1992年 | 3篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1988年 | 4篇 |
1987年 | 2篇 |
1986年 | 3篇 |
1985年 | 5篇 |
1984年 | 3篇 |
1983年 | 1篇 |
1982年 | 3篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1975年 | 1篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1964年 | 1篇 |
排序方式: 共有524条查询结果,搜索用时 15 毫秒
101.
Suzan Verberne Emiel Krahmer Iris Hendrickx Sander Wubben Antal van den Bosch 《Language Resources and Evaluation》2018,52(2):461-483
In this paper we address extractive summarization of long threads in online discussion fora. We present an elaborate user evaluation study to determine human preferences in forum summarization and to create a reference data set. We showed long threads to ten different raters and asked them to create a summary by selecting the posts that they considered to be the most important for the thread. We study the agreement between human raters on the summarization task, and we show how multiple reference summaries can be combined to develop a successful model for automatic summarization. We found that although the inter-rater agreement for the summarization task was slight to fair, the automatic summarizer obtained reasonable results in terms of precision, recall, and ROUGE. Moreover, when human raters were asked to choose between the summary created by another human and the summary created by our model in a blind side-by-side comparison, they judged the model’s summary equal to or better than the human summary in over half of the cases. This shows that even for a summarization task with low inter-rater agreement, a model can be trained that generates sensible summaries. In addition, we investigated the potential for personalized summarization. However, the results for the three raters involved in this experiment were inconclusive. We release the reference summaries as a publicly available dataset. 相似文献
102.
Iris Miescher Petra Wolint Christine Opelz Jess G. Snedeker Pietro Giovanoli Maurizio Calcagni Johanna Buschmann 《International journal of molecular sciences》2022,23(14)
(1) Background: Surgical tendon repair often leads to adhesion formation, leading to joint stiffness and a reduced range of motion. Tubular implants set around sutured tendons might help to reduce peritendinous adhesions. The lubricant hyaluronic acid (HA) is a viable option for optimizing such tubes with the goal of further enhancing the anti-adhesive effect. As the implant degrades over time and diffusion is presumed, the impact of HA on tendon cells is important to know. (2) Methods: A culture medium of rabbit Achilles tenocytes was supplemented with high-molecular-weight (HMW) HA and the growth curves of the cells were assessed. Additionally, after 3, 7 and 14 days, the gene expression of several markers was analyzed for matrix assembly, tendon differentiation, fibrosis, proliferation, matrix remodeling, pro-inflammation and resolution. (3) Results: The addition of HA decreased matrix marker genes, downregulated the fibrosis marker α-SMA for a short time and slightly increased the matrix-remodeling gene MMP-2. Of the pro-inflammatory marker genes, only IL-6 was significantly upregulated. IL-6 has to be kept in check, although IL-6 is also needed for a proper initial inflammation and efficient resolution. (4) Conclusions: The observed effects in vitro support the intended anti-adhesion effect and therefore, the use of HMW HA is promising as a biodegradable implant for tendon repair. 相似文献
103.
DIDS: rapidly prototyping configuration design systems 总被引:3,自引:0,他引:3
Alan Balkany William P. Birmingham Bruce Maxim Jay T. Runkel Iris D. Tommelein 《Journal of Intelligent Manufacturing》1994,5(1):33-45
The domain independent design system (DIDS) provides a set of tools for rapidly constructing new configuration design systems from a library of reusable software elements called mechanisms. A DIDS user begins by creating a model of the problem domain and the task to be automated. This includes describing a library of parts from which new artifacts could be configured, optimization and preference criteria, and functionality constraints. DIDS analyzes this input and automatically builds an operational prototype system by selecting and combining mechanisms. DIDS' ability to automate this process is derived from its model of configuration design, which enables reusable mechanisms to be identified and automatically selected based on a problem's characteristics. The use of DIDS is illustrated by showing how DIDS solved an elevator-configuration problem. 相似文献
104.
Iris Soares Inês Rodrigues Paulo Martins da Costa Luís Gales 《International journal of molecular sciences》2023,24(1)
Over recent decades, multidrug-resistant pathogens have become a global concern, with WHO even considering it one of the biggest threats to global health, food security, and development today, which led to the search for alternative antibacterial agents. A special class is formed by peptides composed by the diphenylalanine motif whose antibacterial properties result from their supramolecular arrangement into nanotubes. However, several other dipeptides that also form nanotubes have been largely overlooked. Here, we present the antibacterial activity of four dipeptide nanotubes. The results point to diverse mechanisms through which dipeptide nanotubes exert their effect against bacteria. Antibacterial activity was similar for dipeptide nanotubes sufficiently wide to allow water flux while dipeptides displaying smaller channels were inactive. This suggests that two of the tested dipeptides, L-Phe-L-Phe (FF, diphenylalanine) and L-Leu-L-Ser (LS), are pore forming structures able to induce membrane permeation and affect cellular hydration and integrity. Of these two dipeptides, only FF demonstrated potential to inhibit biofilm formation. The amyloid-like nature and hydrophobicity of diphenylalanine assemblies are probably responsible for their adhesion to cell surfaces preventing biofilm formation and bacteria attachment. 相似文献
105.
106.
107.
Talita Pimenta do Nascimento Millena Cristina Barros Santos Joel Pimentel de Abreu Iris Lengruber Gonçalves Teixeira de Almeida Márcia Barreto da Silva Feijó Anderson Junger Teodoro Mariana Simões Larraz Ferreira Luiz Claudio Cameron Maria Gabriela Bello Koblitz 《Journal of the science of food and agriculture》2020,100(5):1962-1970
108.
For the model‐based dimensioning and design of bubble columns information about fluiddynamics as well as mass transfer and reaction are needed. These data from the literature are subject to uncertainty. The influence of uncertainty of reaction kinetics on the dimensioning and design of bubble columns is investigated by using the radial discretized compartment model. The results are compared to the outcome of an axial dispersion model. 相似文献
109.
Koss Mary P.; Figueredo Aurelio José; Bell Iris; Tharan Melinda; Tromp Shannon 《Canadian Metallurgical Quarterly》1996,105(3):421
In a cross-validated mediational model, the authors examined characteristics of memories formed in response to rape and other intense unpleasant and pleasant experiences. Data were responses to a mailed survey of women medical center and university employees. Measurement models of memory and symptom factors and a structural model with pathways among cognitive appraisal, emotional valence, memory characteristics, and health outcomes were developed in Sample I (N?=?1,307) and confirmed in Sample 2 (N?=?2,142). Rape had substantial direct effects on 2 memory factors (Clarity and Affect) and indirect effects through the construal of victimization. Rape was associated with memories described as more emotionally intense but less clear and coherent and less often thought of or talked about. Most effects on physical symptoms were nonsignificant. Implications of findings for neurohormonal and multiple representation models of emotional memory and to cognitive avoidance are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
110.