全文获取类型
收费全文 | 928篇 |
免费 | 41篇 |
国内免费 | 1篇 |
学科分类
工业技术 | 970篇 |
出版年
2024年 | 2篇 |
2023年 | 12篇 |
2022年 | 21篇 |
2021年 | 29篇 |
2020年 | 17篇 |
2019年 | 18篇 |
2018年 | 28篇 |
2017年 | 28篇 |
2016年 | 35篇 |
2015年 | 26篇 |
2014年 | 33篇 |
2013年 | 68篇 |
2012年 | 51篇 |
2011年 | 75篇 |
2010年 | 52篇 |
2009年 | 53篇 |
2008年 | 59篇 |
2007年 | 43篇 |
2006年 | 47篇 |
2005年 | 37篇 |
2004年 | 28篇 |
2003年 | 19篇 |
2002年 | 29篇 |
2001年 | 15篇 |
2000年 | 17篇 |
1999年 | 6篇 |
1998年 | 16篇 |
1997年 | 15篇 |
1996年 | 11篇 |
1995年 | 9篇 |
1994年 | 13篇 |
1993年 | 8篇 |
1992年 | 8篇 |
1991年 | 4篇 |
1990年 | 6篇 |
1989年 | 5篇 |
1988年 | 7篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1985年 | 3篇 |
1984年 | 1篇 |
1983年 | 3篇 |
1982年 | 1篇 |
1981年 | 4篇 |
1976年 | 1篇 |
1973年 | 2篇 |
1958年 | 1篇 |
排序方式: 共有970条查询结果,搜索用时 15 毫秒
1.
JJ Bourguignon L Désaubry P Raboisson CG Wermuth C Lugnier 《Canadian Metallurgical Quarterly》1997,40(12):1768-1770
A 6-year-old Quarter Horse gelding with acute onset of a grade-4/5 lameness of the left forelimb 21 days after an encounter with a porcupine was examined. Quills had been removed by the referring veterinarian, and the horse had been treated with antibiotics and hydrotherapy for 14 days. The horse was pyretic and had effusion in the digital synovial sheath. Signs of pain were elicited on palpation of the area. A tentative diagnosis of septic tenosynovitis caused by a porcupine quill was made. Exploratory tenoscopy revealed large amounts of fibrin in the sheath and a 1.2-cm quill. Bacteriologic culture of synovial fluid yielded a pure growth of Staphylococcus aureus. The horse improved dramatically after tenoscopic removal of the quill, debridement of fibrin, and lavage to dilute inflammatory mediators and bacteria, debridement of fibrin, discovery and removal of a quill, and complete evaluation of the sheath for prognostic purposes. Tenoscopy can provide a means for direct observation and enhance the ability of clinicians to debride a septic synovial sheath in a minimally invasive manner. 相似文献
2.
3.
Knowledge representation issues related to the modelling of imprecision and uncertainty are discussed in the framework of possibility theory. Differences and relations between possibility theory, fuzzy sets, probability theory and Shafer evidence theory are presented. Then, patterns of reasoning and inference and control procedures are studied in presence of uncertainty and imprecision using a possibilistic approach. the basic ideas and the main trends are emphasized rather than the mathematical and logical foundations or the technical details of implementation which can be found in the references. 相似文献
4.
Carole E. Baddour Cedric L. Briens Serge Bordere Didier Anglerot Patrice Gaillard 《Chemical Engineering and Processing: Process Intensification》2008,47(12):2195-2202
Since their observation in 1976 and 1991, carbon nanotubes (CNTs) have generated much interest due to their properties and potential applications. CNTs are tubular carbon molecules with remarkable mechanical, electrical, chemical and thermal properties, which make them useful in various applications. Industries producing CNTs via the fluidized bed chemical vapor deposition technique face challenges related to the size of CNT bundles. The two main challenges are agglomeration and agglomerate size distribution control. A solution to these challenges involves the use of jet mills to grind the CNT agglomerates. The goal of this study was to determine whether the nanotubes could be ground with air jets using a commercial jet mill and apply a two-parameter model to describe the grinding process. The present study has indicated that air-jet grinding of CNTs is feasible with a typical commercial jet mill. This paper presents the effect of operational parameters on the arithmetic mean diameter of the ground product. Sonic velocity through the grinding nozzles was required to obtain reasonable grinding rates and relatively narrow particle size distributions. This occurs at high air to solids feedrate ratios. Additionally, a simple attrition model can describe the grinding process in the spiral jet mill. 相似文献
5.
Didier SBILLEAU 《核技术(英文版)》2003,14(1)
We present here a general overview of electron spectroscopies from a practical point of view. The most frequently used ones are described and the type of structural information they can provide on materials is explained in relation to the physical processes on which they are based. Furthermore, we explore critically and in detail various tools that have been developed to allow a systematic solving of structures by these spectroscopies. 相似文献
6.
Didier Perrin Céline Guillermain Anne Bergeret José-Marie Lopez-Cuesta Gilles Tersac 《Journal of Materials Science》2006,41(12):3593-3602
A new process of management of waste of composite materials from Sheet Moulding Compounds (SMC), as reinforcing fillers for
thermoplastic materials, including both mechanical and chemical processes is proposed in this paper. Communited SMC being
composed of coated glass fibres intimately mixed with calcium carbonate powder, their reinforcing power is low. First, the
fibrous part was increased by partial dissolution of calcium carbonate present in the crushed products SMC. Second, a process
of partial solvolysis was developed aiming at strong increasing the interfacial mechanical properties by functionalising of
SMC load incorporated into polypropylene/grafted maleic anhydride polypropylene (PP/PPgma). At this effect, we investigated a treatment with a hot triamine (diethylenetriamine, DETA) in order to create a functionalisation,
after scission of the bond ester of unsaturated polyester, as bridging amino-succinimide.The effect of this recycling way
by partial solvolysis was checked from the mechanical properties of the resulting reinforced PP/PPgma material: Although a lower of Young modulus, better yield stress and especially resilience were observed. 相似文献
7.
8.
The measurement of the flow through complex combined sewer overflow structures in the frame of automated monitoring remains difficult. In this paper, a methodology based on the use of computational fluid dynamics (CFD) modelling in order to improve the instrumentation of a downstream-controlled dual-overflow structure is presented. The dual-overflow structure is composed of two combined sewer overflows (CSOs) connected by a rectangular channel and controlled by a downstream gate located at the entry of the Meyzieu waste water treatment plant (close to Lyon, France). The analysis of the CFD results provides: (i) a better understanding of the interaction between the two CSOs--that means the hydraulic operation, the hydrodynamic behaviour, the backflow effect--and (ii) an ability to optimise the location of the water depth sensor. The measured water depth is used to assess the overflow rate by means of a numerical relationship. Uncertainties are also assessed. 相似文献
9.
10.
Michael Zock Olivier Ferret Didier Schwab 《International Journal of Speech Technology》2010,13(4):201-218
No doubt, words play a major role in language production, hence finding them is of vital importance, be it for writing or
for speaking (spontaneous discourse production, simultaneous translation). Words are stored in a dictionary, and the general
belief holds, the more entries the better. Yet, to be truly useful the resource should contain not only many entries and a
lot of information concerning each one of them, but also adequate navigational means to reveal the stored information. Information
access depends crucially on the organization of the data (words) and the access keys (meaning/form), two factors largely overlooked.
We will present here some ideas of how an existing electronic dictionary could be enhanced to support a speaker/writer to
find the word s/he is looking for. To this end we suggest to add to an existing electronic dictionary an index based on the
notion of association, i.e. words co-occurring in a well balanced corpus, the latter being supposed to represent the average
citizen’s knowledge of the world. Before describing our approach, we will briefly take a critical look at the work being done
by colleagues working on automatic, spontaneous or deliberate language production,—that is, computer-generated language, simulation of the mental lexicon, or WordNet (WN),—to see how adequate they are with regard to our goal. 相似文献