全文获取类型
收费全文 | 257篇 |
免费 | 25篇 |
专业分类
化学工业 | 101篇 |
金属工艺 | 5篇 |
机械仪表 | 6篇 |
建筑科学 | 13篇 |
矿业工程 | 2篇 |
能源动力 | 15篇 |
轻工业 | 50篇 |
水利工程 | 1篇 |
石油天然气 | 2篇 |
无线电 | 8篇 |
一般工业技术 | 31篇 |
冶金工业 | 10篇 |
自动化技术 | 38篇 |
出版年
2024年 | 4篇 |
2023年 | 6篇 |
2022年 | 12篇 |
2021年 | 13篇 |
2020年 | 7篇 |
2019年 | 15篇 |
2018年 | 18篇 |
2017年 | 15篇 |
2016年 | 9篇 |
2015年 | 10篇 |
2014年 | 21篇 |
2013年 | 25篇 |
2012年 | 24篇 |
2011年 | 17篇 |
2010年 | 11篇 |
2009年 | 22篇 |
2008年 | 14篇 |
2007年 | 12篇 |
2006年 | 6篇 |
2005年 | 4篇 |
2004年 | 2篇 |
2003年 | 2篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1992年 | 1篇 |
1989年 | 1篇 |
1988年 | 3篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1983年 | 1篇 |
排序方式: 共有282条查询结果,搜索用时 9 毫秒
101.
Berksoy-Yavuz Ayse Kaya Mustafa Yunus Avcı Tubanur Cakırbas Gizem Menşur Ebru 《Journal of Materials Science: Materials in Electronics》2022,33(5):2336-2349
Journal of Materials Science: Materials in Electronics - The effect of crystallographic texture on the properties of 0.94(Na0.5Bi0.5TiO3)–0.06BaTiO3 (0.94NBT–0.06BT) ceramics were... 相似文献
102.
103.
104.
105.
H. Ayse Aksoy N. Yavasoglu F. Karaosmanoglu H. Civelekoglu 《Journal of the American Oil Chemists' Society》1988,65(8):1303-1306
Content and characteristics of the triglyceride fruit oils of two spurge (Euphorbia L.) subspecies, namelyE. glaerosa Pallas ex Bieb. (var.lasiocarpa Boiss.) andE. niciciana Borbas ex Novak, were investigated. For both taxa, oil content of the capsules enclosing the seeds ranged between 15.7 and
16.4% on dry basis, while the decapsulated seeds contained 33.0–34.0% oil, also on dry basis. The average saponification,
iodine and acid values were 192, 190 and 6.0, respectively; linolenic acid was detected as the major constituent fatty acid.
Consequently, these seed oils are characterized as typical drying oils. 相似文献
106.
Fatemeh Azmandian Member IEEE Ayse Yilmazer Student Member IEEE Jennifer G. Dy Member IEEE Javed A. Aslam IEEE Jennifer G. Dy Member ACM David R. Kaeli Fellow IEEE Member ACM 《计算机科学技术学报》2014,(3):408-422
Acquiring a set of features that emphasize the differences between normal data points and outliers can drastically facilitate the task of identifying outliers. In our work, we present a novel non-parametric evaluation criterion for filter-based feature selection which has an eye towards the final goal of outlier detection. The proposed method seeks the subset of features that represent the inherent characteristics of the normal dataset while forcing outliers to stand out, making them more easily distinguished by outlier detection algorithms. Experimental results on real datasets show the advantage of our feature selection algorithm compared with popular and state-of-the-art methods. We also show that the proposed algorithm is able to overcome the small sample space problem and perform well on highly imbalanced datasets. Furthermore, due to the highly parallelizable nature of the feature selection, we implement the algorithm on a graphics processing unit (GPU) to gain significant speedup over the serial version. The benefits of the GPU implementation are two-fold, as its performance scales very well in terms of the number of features, as well as the number of data points. 相似文献
107.
Murvet Yilmaz Fatih Kircelli Ayse Serra Artan Ozgur Oto Gulay Asci Kutay Gunestepe Ali Basci Ercan Ok Mehmet Sukru Sever 《Hemodialysis international. International Symposium on Home Hemodialysis》2016,20(4):522-529
Introduction Not only anemia, but also erythropoiesis stimulating agent (ESA)s for treating anemia may adversely affect prognosis of chronic hemodialysis patients. Various features of naturally (with no ESA usage) nonanemic patients may be useful for defining several factors in the pathogenesis of anemia. Methods Data, retrieved from the European Clinical Database (EuCliD)‐Turkey on naturally nonanemic prevalent chronic hemodialysis patients (n: 201) were compared with their anemic (those who required ESA treatment) counterparts (n: 3948). Findings Mean hemoglobin values were 13.5 ± 0.8 and 11.5 ± 0.9 g/dL in nonanemic and anemic patients, respectively (P < 0.001). Nonanemia status was associated with younger age, male gender, longer dialysis vintage, nondiabetic status, more frequent hepatitis‐C virus seropositivity and more frequent arteriovenous fistula usage. Serum ferritin and CRP levels and urea reduction ratio were higher in ESA‐requiring patients. One (99%) and two (95.3%) years survival rates of the “naturally nonanemic” patients were superior as compared to anemics (91.0% and 82.6%, respectively), (P < 0.001). Discussion “Naturally nonanemic” status is associated with better survival in prevalent chronic hemodialysis patients; underlying mechanisms in this favorable outcome should be investigated by randomized controlled trials including large number of patients. 相似文献
108.
The objective of this study has been to characterize sialolith, a calcium phosphate deposit that develops in the human oral cavity, by high-resolution field emission scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The morphological and chemical data obtained helped in the determination of their formation mechanism in salivary glands. Sialoliths in the submandibular salivary glands may arise secondary to sialodenitis, but not via a luminal organic nidus. We believe this is the first study that characterizes a sialolith by XPS. 相似文献
109.
Dance has universally been used as a form of human expression for thousands of years. This common human behaviour and communication method has not been explored much in the context of computer-based technology, even within the field of virtual human research. This paper presents an experimental study investigating the impact of watching dancing virtual characters on human emotions. The study analysed the responses of 55 participants, composed of a mix of dancers and non-dancers, who watched a dancing virtual character perform 3 different dances that represented anger, sadness and happiness in different display orders. The participants’ reported changes in their emotions and their feelings of anger, sadness and happiness were significantly dependent on which dancing character’s emotion they watched and the emotional change did not rely on correct recognition of the depicted emotion. For experimental control, our characters were faceless and danced without music. Our results suggest that just by watching a dancing virtual character some of the benefits associated with dancing could be accessed in circumstances where it is not desirable or feasible to dance, justifying further research to develop a personalised character with a face and music that adapts according to the humans’ emotions and preferences. 相似文献
110.
Naci Balkan Engin Tiras Ayse Erol Mustafa Gunes Sukru Ardali MCetin Arikan Dalphine Lagarde Helene Carrère Xavier Marie Cebrail Gumus 《Nanoscale research letters》2012,7(1):574
We report on the Mg-doped, indium-rich GaxIn1−xN (x < 30). In the undoped material, the intrinsic electron density is very high and as a result there is no detectable photoconductivity (PC) signal within the range of temperatures of 30 <T < 300 K. In the Mg-doped material however, where the conductivity is reduced, there is a strong PC spectrum with two prominent low-energy peaks at 0.65 and 1.0 eV and one broad high-energy peak at around 1.35 eV. The temperature dependence of the spectral photoconductivity under constant illumination intensity, at T > 150 K, is determined by the longitudinal-optical phonon scattering together with the thermal regeneration of non-equilibrium minority carriers from traps with an average depth of 103 ± 15 meV. This value is close to the Mg binding energy in GaInN. The complementary measurements of transient photoluminescence at liquid He temperatures give the e-A0 binding energy of approximately 100 meV. Furthermore, Hall measurements in the Mg-doped material also indicate an activated behaviour with an acceptor binding energy of 108 ± 20 meV. 相似文献