全文获取类型
收费全文 | 98526篇 |
免费 | 8957篇 |
国内免费 | 4607篇 |
专业分类
电工技术 | 6405篇 |
技术理论 | 2篇 |
综合类 | 6458篇 |
化学工业 | 15223篇 |
金属工艺 | 5396篇 |
机械仪表 | 5755篇 |
建筑科学 | 7435篇 |
矿业工程 | 2139篇 |
能源动力 | 2854篇 |
轻工业 | 7699篇 |
水利工程 | 2070篇 |
石油天然气 | 4165篇 |
武器工业 | 790篇 |
无线电 | 12921篇 |
一般工业技术 | 12463篇 |
冶金工业 | 5043篇 |
原子能技术 | 1114篇 |
自动化技术 | 14158篇 |
出版年
2024年 | 431篇 |
2023年 | 1559篇 |
2022年 | 2970篇 |
2021年 | 4070篇 |
2020年 | 2864篇 |
2019年 | 2382篇 |
2018年 | 2664篇 |
2017年 | 3109篇 |
2016年 | 2725篇 |
2015年 | 3796篇 |
2014年 | 4930篇 |
2013年 | 6232篇 |
2012年 | 6680篇 |
2011年 | 7386篇 |
2010年 | 6411篇 |
2009年 | 6152篇 |
2008年 | 6083篇 |
2007年 | 5809篇 |
2006年 | 5521篇 |
2005年 | 4523篇 |
2004年 | 3105篇 |
2003年 | 2560篇 |
2002年 | 2629篇 |
2001年 | 2245篇 |
2000年 | 2053篇 |
1999年 | 2035篇 |
1998年 | 1891篇 |
1997年 | 1657篇 |
1996年 | 1462篇 |
1995年 | 1216篇 |
1994年 | 954篇 |
1993年 | 789篇 |
1992年 | 630篇 |
1991年 | 480篇 |
1990年 | 392篇 |
1989年 | 307篇 |
1988年 | 266篇 |
1987年 | 191篇 |
1986年 | 153篇 |
1985年 | 144篇 |
1984年 | 102篇 |
1983年 | 76篇 |
1982年 | 70篇 |
1981年 | 60篇 |
1980年 | 51篇 |
1979年 | 35篇 |
1978年 | 32篇 |
1977年 | 32篇 |
1976年 | 55篇 |
1973年 | 21篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
63.
64.
The application of deep learning in the field of object detection has
experienced much progress. However, due to the domain shift problem, applying an
off-the-shelf detector to another domain leads to a significant performance drop. A
large number of ground truth labels are required when using another domain to train
models, demanding a large amount of human and financial resources. In order to avoid
excessive resource requirements and performance drop caused by domain shift, this
paper proposes a new domain adaptive approach to cross-domain vehicle detection. Our
approach improves the cross-domain vehicle detection model from image space and
feature space. We employ objectives of the generative adversarial network and cycle
consistency loss for image style transfer in image space. For feature space, we align
feature distributions between the source domain and the target domain to improve the
detection accuracy. Experiments are carried out using the method with two different
datasets, proving that this technique effectively improves the accuracy of vehicle
detection in the target domain. 相似文献
66.
Neural Machine Translation (NMT) is an end-to-end learning approach for
automated translation, overcoming the weaknesses of conventional phrase-based translation
systems. Although NMT based systems have gained their popularity in commercial
translation applications, there is still plenty of room for improvement. Being the most
popular search algorithm in NMT, beam search is vital to the translation result. However,
traditional beam search can produce duplicate or missing translation due to its target
sequence selection strategy. Aiming to alleviate this problem, this paper proposed neural
machine translation improvements based on a novel beam search evaluation function. And
we use reinforcement learning to train a translation evaluation system to select better
candidate words for generating translations. In the experiments, we conducted extensive
experiments to evaluate our methods. CASIA corpus and the 1,000,000 pairs of bilingual
corpora of NiuTrans are used in our experiments. The experiment results prove that the
proposed methods can effectively improve the English to Chinese translation quality. 相似文献
67.
68.
69.
70.
Lin Gao Stefano Selleri Giorgio Battistelli Luigi Chisci Giuseppe Pelosi 《国际射频与微波计算机辅助工程杂志》2020,30(9)
This paper presents a novel approach to the localization of moving targets in a complex environment based on the measurement of the perturbations induced by the target presence on an independently‐generated time‐varying electromagnetic field. Field perturbations are measured via a set of sensors deployed over the domain of interest and used to detect and track a possible target by resorting to a particle Bernoulli filter (PBF). To comply with real‐time operation, the PBF works along with an artificial neural network (ANN) model of the environment trained offline via finite elements (FEs). The performance of the proposed algorithm is assessed via simulation experiments. 相似文献