全文获取类型
收费全文 | 198篇 |
免费 | 19篇 |
国内免费 | 38篇 |
专业分类
电工技术 | 4篇 |
综合类 | 2篇 |
化学工业 | 5篇 |
金属工艺 | 4篇 |
机械仪表 | 12篇 |
建筑科学 | 1篇 |
矿业工程 | 2篇 |
能源动力 | 6篇 |
轻工业 | 10篇 |
水利工程 | 2篇 |
石油天然气 | 4篇 |
无线电 | 21篇 |
一般工业技术 | 2篇 |
原子能技术 | 3篇 |
自动化技术 | 177篇 |
出版年
2024年 | 1篇 |
2022年 | 2篇 |
2021年 | 6篇 |
2020年 | 4篇 |
2019年 | 15篇 |
2018年 | 8篇 |
2017年 | 10篇 |
2016年 | 21篇 |
2015年 | 28篇 |
2014年 | 33篇 |
2013年 | 34篇 |
2012年 | 38篇 |
2011年 | 25篇 |
2010年 | 3篇 |
2009年 | 7篇 |
2008年 | 4篇 |
2007年 | 4篇 |
2006年 | 2篇 |
2002年 | 3篇 |
1999年 | 2篇 |
1998年 | 3篇 |
1991年 | 1篇 |
1989年 | 1篇 |
排序方式: 共有255条查询结果,搜索用时 0 毫秒
21.
徐卫滨 《太原重型机械学院学报》2011,(5):343-347
针对人工蜂群算法(ABC)中群体多样性较差的缺点,提出无选择策略的改进的蜜蜂群算法(MABC)。MABC算法改变ABC算法的框架,通过去掉ABC算法中跟随蜂对引领蜂的选择策略,来降低算法的选择压力,提高种群多样性和算法的全局搜索能力。仿真结果表明,该算法能够有效保证群体多样性,提高人工蜂群算法的性能。 相似文献
22.
23.
24.
25.
The main goal of the present paper is to present a two phase approach for solving the reliability–redundancy allocation problems (RRAP) with nonlinear resource constraints. In the first phase of the proposed approach, an algorithm based on artificial bee colony (ABC) is developed to solve the allocation problem while in the second phase an improvement of the solution as obtained by this algorithm is made. Four benchmark problems in the reliability–redundancy allocation and two reliability optimization problems have been taken to demonstrate the approach and it is shown by comparison that the solutions by the new proposed approach are better than the solutions available in the literature. 相似文献
26.
《Food Control》2017
The increasing recognition and production of stingless bee honey has raised the needs to develop rapid, sensitive and accurate methodologies for honey identification through bees' species from the DNA of bees present in honey. Genetic identification of raw honeys produced by different bee species from Malaysia was performed based on mitochondrial DNA sequences and phylogenetic analysis by means of forensically informative nucleotide sequencing (FINS) technique. The 300 bp of mitochondrial large subunit ribosomal RNA (16S rRNA) gene region and mitochondrial cytochrome c oxidase subunit I (COI) gene region were the gene markers used to classify and identify honey produced by Apis honey bees and Trigona stingless bees. The genetic identities of honey origin from Apis dorsata, Apis mellifera, Apis cerana, and Heterotrigona itama were accurately identified. Kelulut honey sourced from the stingless bee was distinguishable from other Apis type of honeys in phylogenetic analyses. This FINS technique is a specific and reliable method for identification of honey origin via its bee source that can be used to overcome the issue of false declaration of honey origin and mislabelling. 相似文献
27.
28.
Anirban Chatterjee Gautam Kumar Mahanti Gourab Ghatak 《International Journal of Satellite Communications and Networking》2014,32(1):25-47
A pattern synthesis method based on Firefly Algorithm (FA) and Artificial Bee Colony (ABC) optimization has been presented to generate satellite footprint patterns from a rectangular planar array of isotropic antennas by modifying the amplitude, phase, and the state of the array elements. Three cases comprising three different footprints of rectangular, square, and circular boundary are generated from the same array by using two different swarm‐based optimization algorithms FA and ABC. Both the algorithms, following the proposed procedures are able to generate the three different footprint patterns while maintaining a satisfactory lower peak side lobe level and ripple. A comparative analysis has been carried out between FA, ABC, and Genetic Algorithm (GA) for the presented problem in terms of fitness value for the three different cases. The superiority of FA and ABC over GA has been established in terms of finding better solutions for all the three cases of the proposed problem. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
29.
Artificial Bee Colony (ABC) algorithm is a relatively new member of swarm intelligence. ABC tries to simulate the intelligent behavior of real honey bees in food foraging and can be used for solving continuous optimization and multi-dimensional numeric problems. This paper introduces the Artificial Bee Colony with Random Keys (ABCRK), a modified ABC algorithm for solving combinatorial problems such as the In-Core Fuel Management Optimization (ICFMO). The ICFMO is a hard combinatorial optimization problem in Nuclear Engineering which during many years has been solved by expert knowledge. It aims at getting the best arrangement of fuel in the nuclear reactor core that leads to a maximization of the operating time. As a consequence, the operation cost decreases and money is saved. In this study, ABCRK is used for optimizing the ICFMO problem of a Brazilian “2-loop” Pressurized Water Reactor (PWR) Nuclear Power Plant (NPP) and the results obtained with the proposed algorithm are compared with those obtained by Genetic Algorithms (GA) and Particle Swarm Optimization (PSO). The results show that the performance of the ABCRK algorithm is better than or similar to that of other population-based algorithms, with the advantage of employing fewer control parameters. 相似文献
30.
蜂花粉对受照大鼠抗辐射效应的研究 总被引:5,自引:0,他引:5
研究了口服蜂花粉对受照大鼠外周血白细胞(PWBC)数,血清超氧化物歧化酶总活力(T-SOD),血清过氧化脂质(LPO)终产物丙二醛(MDA)和过氧化值(POV)的影响。结果表明“蜂花粉具有良好的抗辐射损伤的功能,即服食花粉组的PWBC数和T-SOD明显高于对照的正常组和单放组。花粉线的MDA和POV显著低于对照的正常组和单放组。提示蜂花粉的抗放射要理可能是由于蜂花粉能提高机体的造血重建力,提高体内 相似文献