全文获取类型
收费全文 | 771篇 |
免费 | 27篇 |
国内免费 | 6篇 |
专业分类
电工技术 | 27篇 |
综合类 | 3篇 |
化学工业 | 156篇 |
金属工艺 | 18篇 |
机械仪表 | 17篇 |
建筑科学 | 11篇 |
矿业工程 | 4篇 |
能源动力 | 52篇 |
轻工业 | 21篇 |
水利工程 | 5篇 |
无线电 | 106篇 |
一般工业技术 | 191篇 |
冶金工业 | 69篇 |
原子能技术 | 7篇 |
自动化技术 | 117篇 |
出版年
2024年 | 7篇 |
2023年 | 7篇 |
2022年 | 21篇 |
2021年 | 60篇 |
2020年 | 45篇 |
2019年 | 52篇 |
2018年 | 36篇 |
2017年 | 43篇 |
2016年 | 38篇 |
2015年 | 29篇 |
2014年 | 26篇 |
2013年 | 56篇 |
2012年 | 34篇 |
2011年 | 47篇 |
2010年 | 39篇 |
2009年 | 37篇 |
2008年 | 32篇 |
2007年 | 21篇 |
2006年 | 24篇 |
2005年 | 10篇 |
2004年 | 18篇 |
2003年 | 13篇 |
2002年 | 6篇 |
2001年 | 6篇 |
2000年 | 9篇 |
1999年 | 3篇 |
1998年 | 7篇 |
1997年 | 7篇 |
1996年 | 9篇 |
1995年 | 6篇 |
1994年 | 5篇 |
1993年 | 6篇 |
1992年 | 6篇 |
1991年 | 4篇 |
1990年 | 2篇 |
1988年 | 5篇 |
1987年 | 2篇 |
1986年 | 3篇 |
1985年 | 3篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1982年 | 4篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1973年 | 2篇 |
1972年 | 1篇 |
排序方式: 共有804条查询结果,搜索用时 0 毫秒
801.
Sahu Aditya Kumar Sahu Monalisa Patro Pramoda Sahu Gupteswar Nayak Soumya Ranjan 《Pattern Analysis & Applications》2023,26(2):571-590
Pattern Analysis and Applications - This study proposes an efficient dual image-based reversible fragile watermarking scheme (DI-RFWS) that can accurately detect and locate the tampering regions... 相似文献
802.
Shikha Sinha Debashis Roy Sourav Sengupta Sudarsan Neogi Sirshendu De 《加拿大化工杂志》2023,101(7):4160-4169
Petroleum and exploration industries employ a hydrofracking process where a large volume of water (fracturing fluid) is injected and a fraction (known as flowback water) is returned to the surface. Froth flotation is a typical process employed for the primary treatment of water. In the present work, froth flotation has been used as a pretreatment method for real flowback water sourced from the petroleum and shale gas exploration industry. In the present work, a first-principle based convective mass transfer model has been developed to describe the froth flotation performance. The resultant equation was solved analytically and compared with the numerical solution, and a parametric sensitivity analysis of the process performance was also undertaken. In addition, a correlation to estimate the flotation rate constant was proposed, thereby circumventing the need to obtain a large number of cumbersome parameters experimentally. Overall, this study proposes froth flotation as an efficient primary treatment method towards the separation of dispersed oil droplets from the flowback water and the corresponding prediction of kinetics using a first-principle based transport model. 相似文献
803.
Ashis Kumar Mishra Subasish Mohapatra Pradip Kumar Sahu 《Concurrency and Computation》2024,36(10):e8005
Resource management and job scheduling are essential in today's cloud computing world. Due to task scheduling and users' diverse submission of large-scale requests, co-located VM instances negatively impacted the performance of leased VM instances. This workload further led to resource rivalry across co-located VMs. In order to address the aforementioned problems, numerous strategies have been presented, however, they fail to take the asynchronous nature of the cloud environment into account. To address this issue, a novel “CTA using DLFC-NN model” is proposed. This proposed approach combines the coalition theory and DLFC-NN techniques by including IRT-OPTICS for task size clustering, digital metrology based on ionized information (DMBII) for defect detection in virtue machines (VM), and the dynamic levy flight hamster optimization algorithm for processing time optimization of the clusters. However, the implementation of task scheduling in an online environment is limited by a number of presumptions or oversimplifications made by current scheduling systems. As a result, a unique coalition theory is applied to efficiently schedule activities. In addition, the DLFC-NN model is used to reduce resource consumption, span time, and be highly accurate and energy-efficient when working on both online and offline jobs. Nevertheless, while optimizing the clusters' overall execution time, earlier approaches only decreased the make-span time for task scheduling. However, the DLFC-NN model solves the computation problem by using a fully weighted bipartite graph and the pseudo method to determine the fitness of the least makespan time. The enhanced methodology used in this study reduces the scheduling cost and minimizes job completion times according to different task counts when compared to the existing techniques. 相似文献
804.
Rajiva Lochan Mohanty Sumanta Chaudhuri Paromita Chakraborty Vijay Kumar Mishra Kunja Bihari Sahu Bitanjaya Das 《亚洲传热研究》2023,52(7):4711-4731
Investigations are conducted on electromagnetohydrodynamic (EMHD) flow and heat transfer in a third-grade fluid flowing through large parallel plates, which are maintained at constant temperatures. The impact of convective heat transmission is disregarded since the space between the plates is small. The influence of viscous dissipation is considered. Despite being addressed for Newtonian fluids, the conduction problem with the viscous dissipation effect is not examined in third-grade fluids for EMHD flow and heat transfer behavior. The least-square method is adopted to solve nondimensional, nonlinear momentum and energy conservation equations to get the dimensionless velocity, temperature distribution, and heat flux. Temperature and heat flux are investigated in relation to the third-grade fluid parameter, the Hartmann number, the electric field parameter, and the Brinkman number. The findings show a rise in the Brinkman number dramatically increases heat transfer from both walls, necessitating cooling of both plates. The heat flow from both walls increases as the parameters of third-grade fluid increases. 相似文献