全文获取类型
收费全文 | 220篇 |
免费 | 14篇 |
专业分类
电工技术 | 2篇 |
化学工业 | 52篇 |
金属工艺 | 4篇 |
建筑科学 | 10篇 |
矿业工程 | 1篇 |
能源动力 | 4篇 |
轻工业 | 29篇 |
水利工程 | 3篇 |
石油天然气 | 2篇 |
无线电 | 9篇 |
一般工业技术 | 37篇 |
冶金工业 | 11篇 |
原子能技术 | 2篇 |
自动化技术 | 68篇 |
出版年
2024年 | 1篇 |
2023年 | 4篇 |
2022年 | 3篇 |
2021年 | 9篇 |
2020年 | 2篇 |
2019年 | 4篇 |
2018年 | 5篇 |
2017年 | 5篇 |
2016年 | 11篇 |
2015年 | 12篇 |
2014年 | 15篇 |
2013年 | 17篇 |
2012年 | 15篇 |
2011年 | 24篇 |
2010年 | 8篇 |
2009年 | 11篇 |
2008年 | 16篇 |
2007年 | 6篇 |
2006年 | 11篇 |
2005年 | 8篇 |
2004年 | 8篇 |
2003年 | 9篇 |
2002年 | 3篇 |
2001年 | 1篇 |
2000年 | 3篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1997年 | 3篇 |
1995年 | 4篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1986年 | 2篇 |
1985年 | 1篇 |
1982年 | 3篇 |
1981年 | 2篇 |
1970年 | 1篇 |
排序方式: 共有234条查询结果,搜索用时 16 毫秒
1.
A. B. Matvienko M. P. Kupchik V. V. Mank 《Journal of Engineering Physics and Thermophysics》1986,50(1):91-95
An experimental study is performed of mass-exchange processes during extraction in a capillary porous solid-liquid system in an electric field. The experimental data are generalized to a critical function.Translated from Inzhererno-Fizicheskii Zhurnal, Vol. 50, No. 1, pp. 109–113, January, 1986. 相似文献
2.
Smokers Richard Gense Raymond Rijkeboer Rudolf Dijkhuizen Arjan 《Topics in Catalysis》2004,30(1-4):439-443
Topics in Catalysis - This paper presents the results of a quantitatively substantiated “expert judgement” concerning the potential for further reduction of the exhaust emissions of... 相似文献
3.
Arjan Durresi Mimoza Durresi Leonard Barolli 《Journal of Computer and System Sciences》2011,77(4):677-686
We study the unique trust management, and more precisely reputation management and revocation of malicious nodes in the context of ad hoc networks used for emergency communications.Unlike in centralized systems, reputation management and revocation in ad hoc networks is non-trivial. This difficulty is due to the fact that the nodes have to collaboratively calculate the reputation value of a particular node and then revoke the node if the reputation value goes below a threshold. A major challenge in this scheme is to prevent a malicious node from discrediting other genuine nodes. The decision to revoke a node has to be communicated to all the nodes of the network. In traditional ad hoc networks the overhead of broadcasting the message throughout the network may be very high. We solve the problem of reputation management and node revocation in ad hoc networks of cell phones by using a threshold cryptography based scheme. Each node of the network would have a set of anonymous referees, which would store the reputation information of the node and issue reputation certificates to the node with timestamps. The misbehavior of a particular cell phone is reported to its anonymous referees, who issue certificates which reflect the positive and negative recommendations. 相似文献
4.
Given a plant and a desired specification our goal is to construct a controller system which, when interconnected with the plant, yields a system that behaves like the desired specification. We can always construct the canonical controller introduced in van der Schaft (2003) [10]. For linear systems there exists a controller which when interconnected to the plant yields the desired behaviour if and only if the canonical controller is itself one such controller, see Vinjamoor and van der Schaft (2011) [4]. In this paper we extend this result to nonlinear systems. It turns out that one has to look at the canonical controller together with its subsystems. We obtain necessary and sufficient conditions for the existence of a controller for a class of nonlinear systems. We end with examples which show that in certain cases looking at subsystems of the canonical controller also does not suffice. 相似文献
5.
Leonard Barolli Akio Koyama Arjan Durresi Giuseppe De Marco 《Information Systems Frontiers》2006,8(4):297-306
Due to the opportunities provided by the Internet, more and more people are taking advantage of distance learning courses
and during the last few years enormous research efforts have been dedicated to the development of distance learning systems.
So far, many e-learning systems are proposed and used practically. However, in these systems the e-learning completion rate
is about 30%. One of the reasons is the low study desire when the learner studies the learning materials. In this research,
we propose an interactive Web-based e-learning system. The purpose of our system is to increase the e-learning completion
rate by stimulating learner’s motivation. The proposed system has three subsystems: the learning subsystem, learner support
subsystem, and teacher support subsystem. The learning subsystem improves the learner’s study desire. The learner support
subsystem supports the learner during the study, and the teacher support subsystem supports the teacher to get the learner’s
study state. To evaluate the proposed system, we developed several experiments and surveys. By using new features such as:
display of learner’s study history, change of interface color, encourage function, ranking function, self-determination of
the study materials, and grouping of learners, the proposed system can increase the learning efficiency.
相似文献
Giuseppe De MarcoEmail: |
6.
Julie K. Furmick Dr. Ichiro Kaneko Angela N. Walsh Joanna Yang Jaskaran S. Bhogal Geoffrey M. Gray Juan C. Baso Drew O. Browder Jessica L. S. Prentice Luis A. Montano Chanh C. Huynh Lisa M. Marcus Dorian G. Tsosie Jungeun S. Kwon Alexis Quezada Nicole M. Reyes Brittney Lemming Puneet Saini Dr. Arjan van der Vaart Dr. Thomas L. Groy Dr. Pamela A. Marshall Dr. Peter W. Jurutka Dr. Carl E. Wagner 《ChemMedChem》2012,7(9):1551-1566
7.
V. M. Galimova I. V. Surovtsev V. V. Mank V. I. Maksin V. A. Kopilevich 《Journal of Water Chemistry and Technology》2012,34(6):284-287
The technique has been developed for determination of arsenic in drinking and natural waters (≥0.5 μg/dm3) based on the improved method of inversion chronopotentiometry using an M-XA1000-5 analyzer. The article has discussed the expediency of using this method for monitoring the state of the environment. 相似文献
8.
Arjan F. Kirkels 《Renewable & Sustainable Energy Reviews》2012,16(6):4105-4115
This study aims to provide a long term overview of developments in energy from biomass in Western Europe by analyzing the discourse in RD&D and related policy. To this end, the discourse in Western Europe between 1980 and 2010 has been studied by the literature study of open literature and articles of the European Biomass Conference. In addition, a quantitative content analysis of titles of the conference has been performed. This shows the dynamics with respect to considered feedstock, conversion technology, application as well as supporting arguments for this – a dynamics that will not show in a technology or country oriented study. We distinguish four different discourses based on differentiation to scale and knowledge intensity – but that also relates to feedstock and conversion technology. This way, the complex developments can be structured and understood as shift between and within discourses. This is especially relevant as each discourse involves a different policy arena and different actors. With a still growing interest in energy from biomass, the multiple discourses seem to keep co-existing. Emphasis continues to be given to large scale and knowledge intensive processes, which will further increase the importance of the supra-national level for future developments. 相似文献
9.
Experimental and modelling studies on continuous synthesis and refining of biodiesel in a dedicated bench scale unit using centrifugal contactor separator technology 下载免费PDF全文
10.
Joop van Deelen Marco Barink Lennaert Klerk Pim Voorthuijzen Arjan Hovestad 《Progress in Photovoltaics: Research and Applications》2015,23(4):498-506
For thin film solar cells, there is a large gap between the record efficiencies and panel power output. It was found that for a “typical industrial” CIGS cell efficiency of 15.5%, the efficiency drops to 11.7% when it is operating under the circumstances of a monolithically integrated solar panel. Part of this gap is due to limited conductivity and transmittance of the front contact. By application of a metallic grid, the conductivity can be improved by over two order of magnitude at a transmittance loss of only a few percent as was shown experimentally. In addition, modeling was used to quantify the impact of such approach on the power output of monolithically integrated solar panels. This model includes optical and resistive losses, as well as related losses caused by the inhomogeneity of the operating voltage over the surface. Both power output and the different types of losses are mapped out for various cell configurations. Optimization of transparent conductive oxide resistance, cell length, finger width, and finger spacing of grids was performed and led to an efficiency improvement from 11.7% to 13.8% when the front contact is upgraded with a metallic grid consisting of 20 µm wide parallel fingers positioned perpendicular to the interconnect. Further optimization for a wide variety of cell and grid configurations show that for a technically more feasible size of 100 µm wide fingers, the calculated efficiency is still 13.5%. Finally, the power output is mapped out for a large number of configurations as to create an overview and insight in the interdependencies of cell configuration and finger dimensions. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献