全文获取类型
收费全文 | 977篇 |
免费 | 44篇 |
国内免费 | 6篇 |
专业分类
电工技术 | 13篇 |
综合类 | 1篇 |
化学工业 | 249篇 |
金属工艺 | 22篇 |
机械仪表 | 24篇 |
建筑科学 | 14篇 |
矿业工程 | 2篇 |
能源动力 | 75篇 |
轻工业 | 58篇 |
水利工程 | 3篇 |
石油天然气 | 1篇 |
无线电 | 88篇 |
一般工业技术 | 195篇 |
冶金工业 | 64篇 |
原子能技术 | 2篇 |
自动化技术 | 216篇 |
出版年
2024年 | 9篇 |
2023年 | 44篇 |
2022年 | 47篇 |
2021年 | 74篇 |
2020年 | 50篇 |
2019年 | 52篇 |
2018年 | 70篇 |
2017年 | 54篇 |
2016年 | 46篇 |
2015年 | 28篇 |
2014年 | 40篇 |
2013年 | 73篇 |
2012年 | 50篇 |
2011年 | 60篇 |
2010年 | 53篇 |
2009年 | 45篇 |
2008年 | 42篇 |
2007年 | 38篇 |
2006年 | 35篇 |
2005年 | 20篇 |
2004年 | 10篇 |
2003年 | 8篇 |
2002年 | 7篇 |
2001年 | 2篇 |
2000年 | 3篇 |
1999年 | 1篇 |
1998年 | 7篇 |
1997年 | 6篇 |
1996年 | 7篇 |
1995年 | 4篇 |
1994年 | 4篇 |
1993年 | 1篇 |
1991年 | 4篇 |
1990年 | 6篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1987年 | 6篇 |
1986年 | 3篇 |
1985年 | 4篇 |
1984年 | 1篇 |
1982年 | 1篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1978年 | 3篇 |
1976年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有1027条查询结果,搜索用时 15 毫秒
91.
92.
Rahul Nagpal Y.N. Srikant 《Parallel Computing》2011,37(1):42-59
Clustered VLIW architectures solve the scalability problem associated with flat VLIW architectures by partitioning the register file and connecting only a subset of the functional units to a register file. However, inter-cluster communication in clustered architectures leads to increased leakage in functional components and a high number of register accesses. In this paper, we propose compiler scheduling algorithms targeting two previously ignored power-hungry components in clustered VLIW architectures, viz., instruction decoder and register file.We consider a split decoder design and propose a new energy-aware instruction scheduling algorithm that provides 14.5% and 17.3% benefit in the decoder power consumption on an average over a purely hardware based scheme in the context of 2-clustered and 4-clustered VLIW machines. In the case of register files, we propose two new scheduling algorithms that exploit limited register snooping capability to reduce extra register file accesses. The proposed algorithms reduce register file power consumption on an average by 6.85% and 11.90% (10.39% and 17.78%), respectively, along with performance improvement of 4.81% and 5.34% (9.39% and 11.16%) over a traditional greedy algorithm for 2-clustered (4-clustered) VLIW machine. 相似文献
93.
We introduce the concert (or cafeteria) queueing problem: A finite but large number of customers arrive into a queueing system
that starts service at a specified opening time. Each customer is free to choose her arrival time (before or after opening
time), and is interested in early service completion with minimal wait. These goals are captured by a cost function which
is additive and linear in the waiting time and service completion time, with coefficients that may be class dependent. We
consider a fluid model of this system, which is motivated as the fluid-scale limit of the stochastic system. In the fluid
setting, we explicitly identify the unique Nash-equilibrium arrival profile for each class of customers. Our structural results
imply that, in equilibrium, the arrival rate is increasing up until the closing time where all customers are served. Furthermore,
the waiting queue is maximal at the opening time, and monotonically decreases thereafter. In the simple single class setting,
we show that the price of anarchy (PoA, the efficiency loss relative to the socially optimal solution) is exactly two, while
in the multi-class setting we develop tight upper and lower bounds on the PoA. In addition, we consider several mechanisms
that may be used to reduce the PoA. The proposed model may explain queueing phenomena in diverse settings that involve a pre-assigned
opening time. 相似文献
94.
Silicon - In the present paper, investigation on wettability and contact angle measurement of twenty-one SAW fluxes for CaO-SiO2-TiO2 & Al2O3-CaO-SiO2 welding flux system at a temperature... 相似文献
95.
Wireless Personal Communications - During the development of wireless sensor networks for smart cities, deployment of nodes in three-dimensional space is important factor as data loss in such cases... 相似文献
96.
Mechanical behavior of lattice structures is important for a range of engineering applications. Herein, a new semiempirical model is proposed that describes the entire range of stress–strain response of lattice structures, including the stress-instability region which is modeled as an oscillator. The model can be fit to individual stress–strain curves to extract elastic modulus, yield stress, collapse stress, post-yield collapse ratio, densification strain, and the energy absorbed per unit volume. The model is fit to 119 unique experimental stress–strain curves from 13 research papers in literature covering four different lattice designs, namely, octet truss, body-centered cubic with vertical members, body-centered cubic, and hexagonal. Manufacturing methods (additive and conventional) and materials (metals and polymers) were also included in the analysis. The fitted model yields several new insights into the compression behavior of previously tested lattice structures and can be applied to additional lattice designs. Among other results, analysis of variance (ANOVA) reveals that the octet truss lattice demonstrates the highest post-yield collapse ratio and the smallest normalized energy absorption per unit volume amongst the lattice structures investigated. The proposed model is a powerful tool for designers to quantitatively compare and select 3D lattice structures with the desired mechanical characteristics. 相似文献
97.
Mahesh B. Shelke Jeong Gon Lee Sovan Samanta Sachin N. Deshmukh G. Bhalke Daulappa Rahul B. Mannade Arun Kumar Sivaraman 《计算机系统科学与工程》2023,44(3):2457-2468
In today’s digital world, millions of individuals are linked to one another via the Internet and social media. This opens up new avenues for information exchange with others. Sentiment analysis (SA) has gotten a lot of attention during the last decade. We analyse the challenges of Sentiment Analysis (SA) in one of the Asian regional languages known as Marathi in this study by providing a benchmark setup in which we first produced an annotated dataset composed of Marathi text acquired from microblogging websites such as Twitter. We also choose domain experts to manually annotate Marathi microblogging posts with positive, negative, and neutral polarity. In addition, to show the efficient use of the annotated dataset, an ensemble-based model for sentiment analysis was created. In contrast to others machine learning classifier, we achieved better performance in terms of accuracy for ensemble classifier with 10-fold cross-validation (cv), outcomes as 97.77%, f-score is 97.89%. 相似文献
98.
In the present study,corrosion behavior of diffusion bonded joints formed between micro-duplex stainless steel(MDSS) and Ti6AI4V alloy(TiA)(at 900 ℃ for 60 min under 4 MPa uniaxial pressure in vacuum) was investigated in 1 mol/L HCI and 1 mol/L NaOH solutions using various electrochemical measurements such as open circuit potential(OCP),electrochemical impedance spectroscopy(EIS) and potentiodynamic polarization(PD).For comparison,corrosion behavior of base metals(MDSS and TiA) was also evaluated.Bonded joint was characterized by light optical microscopy and scanning electron microscopy using backscattered electron mode.The layer wise σ phase and λ + FeTi phase mixture has been observed at the bond interface and the bond tensile strength and shear strength were ~556.4 MPa and ~420.2 MPa,respectively. 相似文献
99.
Gupta Saurabh Tolani Varun Davidson James Levine Sergey Sukthankar Rahul Malik Jitendra 《International Journal of Computer Vision》2020,128(5):1311-1330
International Journal of Computer Vision - We introduce a neural architecture for navigation in novel environments. Our proposed architecture learns to map from first-person views and plans a... 相似文献
100.
Transient effects on microchannel electrokinetic filtering with an ion-permselective membrane 总被引:1,自引:0,他引:1
The electrokinetics and hydrodynamics in a hybrid microfluidic/nanofluidic pore network configuration and its effect on the concentration enrichment of charged analytes are described. A hydrogel microplug, photopolymerized in a microfluidic channel, with negative surface charge serves as a nanoporous membrane and dictates the electrokinetic behavior within the adjoining microchannel compartments. The nanoporous hydrogel with a mean pore size on the order of the electrical double layer thickness imparts ion-permselectivity (cation-selectivity) to the migration of ionic species which, under the influence of an applied electrical field, drives concentration polarization in bulk solution near the interfaces between the two microchannel compartments and the hydrogel-based nanopores. The concentration enrichment efficiency for charged analytes depends on this concentration polarization, which strongly affects the distribution of local electrical field strength. In addition, electroosmotic flow in the device plays a critical role in determining the location of the analyte enrichment zone. A theoretical model and simulations are presented to explain the interplay of concentration polarization and electroosmotic flow with respect to the observed concentration enrichment of negatively charged analytes at the cathodic hydrogel plug-microchannel solution interface. 相似文献