全文获取类型
收费全文 | 733篇 |
免费 | 41篇 |
国内免费 | 4篇 |
专业分类
电工技术 | 8篇 |
综合类 | 2篇 |
化学工业 | 268篇 |
金属工艺 | 12篇 |
机械仪表 | 16篇 |
建筑科学 | 10篇 |
矿业工程 | 1篇 |
能源动力 | 33篇 |
轻工业 | 50篇 |
水利工程 | 7篇 |
石油天然气 | 1篇 |
无线电 | 109篇 |
一般工业技术 | 136篇 |
冶金工业 | 20篇 |
原子能技术 | 9篇 |
自动化技术 | 96篇 |
出版年
2024年 | 6篇 |
2023年 | 17篇 |
2022年 | 21篇 |
2021年 | 43篇 |
2020年 | 30篇 |
2019年 | 27篇 |
2018年 | 41篇 |
2017年 | 30篇 |
2016年 | 38篇 |
2015年 | 23篇 |
2014年 | 31篇 |
2013年 | 60篇 |
2012年 | 42篇 |
2011年 | 62篇 |
2010年 | 36篇 |
2009年 | 29篇 |
2008年 | 36篇 |
2007年 | 14篇 |
2006年 | 22篇 |
2005年 | 14篇 |
2004年 | 9篇 |
2003年 | 6篇 |
2002年 | 6篇 |
2001年 | 2篇 |
2000年 | 7篇 |
1999年 | 5篇 |
1998年 | 8篇 |
1997年 | 5篇 |
1996年 | 12篇 |
1995年 | 6篇 |
1994年 | 7篇 |
1993年 | 5篇 |
1992年 | 5篇 |
1991年 | 4篇 |
1989年 | 4篇 |
1987年 | 2篇 |
1986年 | 4篇 |
1985年 | 7篇 |
1984年 | 6篇 |
1983年 | 7篇 |
1982年 | 12篇 |
1981年 | 6篇 |
1980年 | 4篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1974年 | 3篇 |
1972年 | 1篇 |
1969年 | 1篇 |
排序方式: 共有778条查询结果,搜索用时 0 毫秒
631.
632.
Biswash Sanjay Kumar Nagaraj Santosh Sarkar Mahasweta Narra Naga Rajesh 《Wireless Personal Communications》2017,92(3):1193-1220
Wireless Personal Communications - Mobility with high degree of network-facility is a mandatory attribute for better QoS in cellular networks, but it leads to a huge increment in energy... 相似文献
633.
634.
Santosh Kumar Lokendra Singh Sanjeev Kumar Raghuwanshi 《Journal of Computational Electronics》2017,16(1):139-147
Plasmonic metal–insulator–metal (MIM) waveguides have the unique attribute of propagating surface plasmons beyond the diffraction limit. In this paper, basic designs for half-adder and half-subtractor circuits are proposed based on the nonlinear effect in Mach–Zehnder interferometers designed using plasmonic MIM waveguides. The proposed devices are studied in the third optical communications window with transverse magnetic polarization. The designs are verified by the finite-difference time-domain technique with the help of MATLAB simulations. 相似文献
635.
636.
637.
Brent Martin Antonija Mitrovic Kenneth R. Koedinger Santosh Mathan 《User Modeling and User-Adapted Interaction》2011,21(3):249-283
Personalised environments such as adaptive educational systems can be evaluated and compared using performance curves. Such
summative studies are useful for determining whether or not new modifications enhance or degrade performance. Performance
curves also have the potential to be utilised in formative studies that can shape adaptive model design at a much finer level
of granularity. We describe the use of learning curves for evaluating personalised educational systems and outline some of
the potential pitfalls and how they may be overcome. We then describe three studies in which we demonstrate how learning curves
can be used to drive changes in the user model. First, we show how using learning curves for subsets of the domain model can
yield insight into the appropriateness of the model’s structure. In the second study we use this method to experiment with
model granularity. Finally, we use learning curves to analyse a large volume of user data to explore the feasibility of using
them as a reliable method for fine-tuning a system’s model. The results of these experiments demonstrate the successful use
of performance curves in formative studies of adaptive educational systems. 相似文献
638.
639.
Basant Subba Santosh Biswas Sushanta Karmakar 《International Journal of Wireless Information Networks》2018,25(4):399-421
Most of the existing intrusion detection frameworks proposed for wireless sensor networks (WSNs) are computation and energy intensive, which adversely affect the overall lifetime of the WSNs. In addition, some of these frameworks generate a significant volume of IDS traffic, which can cause congestion in bandwidth constrained WSNs. In this paper, we aim to address these issues by proposing a game theory based multi layered intrusion detection framework for WSNs. The proposed framework uses a combination of specification rules and a lightweight neural network based anomaly detection module to identify the malicious sensor nodes. Additionally, the framework models the interaction between the IDS and the sensor node being monitored as a two player non-cooperative Bayesian game. This allows the IDS to adopt probabilistic monitoring strategies based on the Bayesian Nash Equilibrium of the game and thereby, reduce the volume of IDS traffic introduced into the sensor network. The framework also proposes two different reputation update and expulsion mechanisms to enforce cooperation and discourage malicious behavior among monitoring nodes. These mechanisms are based on two different methodologies namely, Shapley Value and Vickery–Clark–Grooves (VCG) mechanism. The complexity analysis of the proposed reputation update and expulsion mechanisms have been carried out and are shown to be linear in terms of the input sizes of the mechanisms. Simulation results show that the proposed framework achieves higher accuracy and detection rate across wide range of attacks, while at the same time minimizes the overall energy consumption and volume of IDS traffic in the WSN. 相似文献
640.
Ramin Rojaee Salvatore Cavallo Santosh Mogurampelly Bill K. Wheatle Vitaliy Yurkiv Ramasubramonian Deivanayagam Tara Foroozan Md Golam Rasul Soroosh Sharifi‐Asl Abhijit H. Phakatkar Meng Cheng Seoung‐Bum Son Yayue Pan Farzad Mashayek Venkat Ganesan Reza Shahbazian‐Yassar 《Advanced functional materials》2020,30(32)
Despite significant interest toward solid‐state electrolytes owing to their superior safety in comparison to liquid‐based electrolytes, sluggish ion diffusion and high interfacial resistance limit their application in durable and high‐power density batteries. Here, a novel quasi‐solid Li+ ion conductive nanocomposite polymer electrolyte containing black phosphorous (BP) nanosheets is reported. The developed electrolyte is successfully cycled against Li metal (over 550 h cycling) at 1 mA cm?2 at room temperature. The cycling overpotential is dropped by 75% in comparison to BP‐free polymer composite electrolyte indicating lower interfacial resistance at the electrode/electrolyte interfaces. Molecular dynamics simulations reveal that the coordination number of Li+ ions around (trifluoromethanesulfonyl)imide (TFSI?) pairs and ethylene‐oxide chains decreases at the Li metal/electrolyte interface, which facilitates the Li+ transport through the polymer host. Density functional theory calculations confirm that the adsorption of the LiTFSI molecules at the BP surface leads to the weakening of N and Li atomic bonding and enhances the dissociation of Li+ ions. This work offers a new potential mechanism to tune the bulk and interfacial ionic conductivity of solid‐state electrolytes that may lead to a new generation of lithium polymer batteries with high ionic conduction kinetics and stable long‐life cycling. 相似文献