全文获取类型
收费全文 | 297篇 |
免费 | 15篇 |
国内免费 | 4篇 |
专业分类
电工技术 | 10篇 |
综合类 | 10篇 |
化学工业 | 12篇 |
金属工艺 | 2篇 |
机械仪表 | 12篇 |
建筑科学 | 35篇 |
矿业工程 | 34篇 |
能源动力 | 9篇 |
轻工业 | 3篇 |
水利工程 | 25篇 |
石油天然气 | 6篇 |
武器工业 | 1篇 |
无线电 | 24篇 |
一般工业技术 | 15篇 |
冶金工业 | 8篇 |
原子能技术 | 5篇 |
自动化技术 | 105篇 |
出版年
2024年 | 1篇 |
2023年 | 3篇 |
2022年 | 2篇 |
2021年 | 5篇 |
2020年 | 8篇 |
2019年 | 11篇 |
2018年 | 4篇 |
2017年 | 5篇 |
2016年 | 4篇 |
2015年 | 14篇 |
2014年 | 23篇 |
2013年 | 22篇 |
2012年 | 17篇 |
2011年 | 15篇 |
2010年 | 9篇 |
2009年 | 15篇 |
2008年 | 12篇 |
2007年 | 11篇 |
2006年 | 14篇 |
2005年 | 12篇 |
2004年 | 17篇 |
2003年 | 14篇 |
2002年 | 10篇 |
2001年 | 6篇 |
2000年 | 11篇 |
1999年 | 5篇 |
1998年 | 4篇 |
1997年 | 8篇 |
1996年 | 5篇 |
1995年 | 10篇 |
1994年 | 5篇 |
1993年 | 4篇 |
1992年 | 4篇 |
1991年 | 2篇 |
1989年 | 1篇 |
1987年 | 1篇 |
1982年 | 1篇 |
1981年 | 1篇 |
排序方式: 共有316条查询结果,搜索用时 31 毫秒
91.
92.
93.
The aim of this project was to develop a direct observation instrument to assess the work technique of nursing personnel during patient transfers and to test the validity and reliability of the instrument. An expert group developed this instrument, called DINO (DIrect Nurse Observation instrument for assessment of work technique during patient transfers), which contains 16 items divided into three phases of a transfer: the preparation, performance and result phases. To quantify the assessments a scoring system was constructed, giving an overall score for each transfer, depending on the level of musculoskeletal health and safety. Four observers assessed 45 patient transfers at hospital wards and showed in an evaluation that the inter-observer reliability and criterion-related validity of DINO was satisfactory. The assessments with the DINO instrument are done directly when the transfer occurs, without costly equipment. Therefore, it has a wide range of applications. For example, when evaluating training in work technique or when identifying an unsafe work technique as a risk factor for musculoskeletal problems in epidemiological studies. 相似文献
94.
95.
介绍了矿用运输车的全自动检测系统,此系统采用智能采集板通过多路传感器对运输车辆的轴重、速度、侧滑和制动等项目的信号采集,借助于计算机实现对运输车辆的全自动检测。 相似文献
96.
97.
Karin Wendin Bodil H. Allesen-HolmWender L.P. Bredie 《Food quality and preference》2011,22(4):346-354
Basic taste solutions induce sensory perceptions via taste receptors and give rise to specific facial reactions. Many of these have been shown to be innate. The aim of this study was to explore relationships between the sensory perception of basic taste solutions at different concentrations and facial reactions.Basic taste solutions each at three levels plus water were served to a panel. The assessors individually identified quality, intensity and pleasantness. They were recorded during tasting and their facial reactions (based on FACS) were coded and analysed.Facial reactions indicated both quality and concentration of the stimuli. The intensity of most facial reactions increased with increasing stimulus concentration, most pronounced for sourness (lips) and bitterness (eyes and forehead). Pleasantness ratings decreased with increasing concentrations of all basic tastes. Water and the lowest sucrose concentration were perceived as the most pleasant samples and gave rise to the lowest intensity of facial reactions. The study showed that a combination of sensory analyses and facial expressions was successful in adding further insight to the knowledge of perception of basic tastes. 相似文献
98.
This note proposes ILC for discrete-time affine nonlinear systems with randomly iteration varying lengths. No prior information on the probability distribution of random iteration length is required prior for controller design. The conventional P-type update law is used with a modified tracking error because of randomly iteration varying lengths. A novel technical lemma is proposed for the strict convergence analysis in pointwise sense. An illustrative example verifies the theoretical results. 相似文献
99.
观察运动与想象运动范式的脑电活动相关性研究 总被引:1,自引:0,他引:1
当进行想象左右手运动和观察左右手运动时,会以几乎同样的方式改变大脑主要感觉区域的神经活动,引起脑电相关频率成分的特征变化。但是还没有有效的理论来解释两种范式之间是否存在较强的相关性。本文为了研究两种范式之间是否存在着相关性,从对比实验的方法出发,设计了观察运动和运动想象的实验范式,并邀请八名受试者进行了两种范式的对比实验。分类结果显示,相同受试在参与两种范式实验的结果上,没有呈现出明显的相关性,表现虽然两种实验范式可以激发相似的脑电活动现象,但是他们产生的基理还是有差异,本文工作为下一步的研究提供了方向和思路。 相似文献
100.
Kerstin BunteAuthor Vitae Barbara HammerAuthor VitaeThomas VillmannAuthor Vitae Michael BiehlAuthor VitaeAxel WismüllerAuthor Vitae 《Neurocomputing》2011,74(9):1340-1350
We present an extension of the Exploratory Observation Machine (XOM) for structure-preserving dimensionality reduction. Based on minimizing the Kullback-Leibler divergence of neighborhood functions in data and image spaces, this Neighbor Embedding XOM (NE-XOM) creates a link between fast sequential online learning known from topology-preserving mappings and principled direct divergence optimization approaches. We quantitatively evaluate our method on real-world data using multiple embedding quality measures. In this comparison, NE-XOM performs as a competitive trade-off between high embedding quality and low computational expense, which motivates its further use in real-world settings throughout science and engineering. 相似文献