全文获取类型
收费全文 | 112篇 |
免费 | 6篇 |
专业分类
化学工业 | 32篇 |
机械仪表 | 1篇 |
建筑科学 | 3篇 |
矿业工程 | 1篇 |
能源动力 | 2篇 |
轻工业 | 5篇 |
无线电 | 6篇 |
一般工业技术 | 7篇 |
冶金工业 | 10篇 |
自动化技术 | 51篇 |
出版年
2022年 | 5篇 |
2021年 | 4篇 |
2020年 | 2篇 |
2019年 | 4篇 |
2018年 | 3篇 |
2017年 | 3篇 |
2016年 | 2篇 |
2015年 | 6篇 |
2014年 | 4篇 |
2013年 | 14篇 |
2012年 | 9篇 |
2011年 | 11篇 |
2010年 | 4篇 |
2009年 | 17篇 |
2008年 | 7篇 |
2007年 | 2篇 |
2006年 | 2篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1998年 | 4篇 |
1996年 | 3篇 |
1994年 | 1篇 |
1991年 | 1篇 |
1989年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有118条查询结果,搜索用时 140 毫秒
111.
112.
We study the hierarchically structured bin packing problem. In this problem, the items to be packed into bins are at the leaves of a tree. The objective of the packing is to minimize the total number of bins into which the descendants of an internal node are packed, summed over all internal nodes. We investigate an existing algorithm and make a correction to the analysis of its approximation ratio. Further results regarding the structure of an optimal solution and a strengthened inapproximability result are given. 相似文献
113.
Research on peptide classification problems has focused mainly on the study of different encodings and the application of several classification algorithms to achieve improved prediction accuracies. The main drawback of the literature is the lack of an extensive comparison among the available encoding methods on a wide range of classification problems. This paper addresses the fundamental issue of which peptide encoding promises the best results for machine learning classifiers. Two novel encoding methods based on physicochemical properties of the amino acids are proposed and an extensive comparison with several standard encoding methods is performed on three different classification problems (HIV-protease, recognition of T-cell epitopes and prediction of peptides that bind human leukocyte antigens). The experimental results demonstrate the effectiveness of the new encodings and show that the frequently used orthonormal encoding is inferior compared to other methods. 相似文献
114.
It is well known that microarray printing, hybridization, and washing oftentimes create erroneous measurements, and these
errors detrimentally impact machine microarray spot quality classification. Thus, it is crucial to identify and remove these
errors if automation is to replace the still common practice of visually assessing spot quality, an extremely expensive and
time-consuming procedure. A major problem in microarray spot quality classification methods proposed in the literature is
the correlation among the features extracted from the spots. In this paper, we propose using a random subspace ensemble of
neural networks and a feature selection algorithm to improve the performance of our microarray spot quality classification
method. Our best method obtains an error under the receiver operating characteristic curve (EAUR) of 0.3 outperforming the
stand-alone support vector machine EAUR of 1.7. The consistency of our proposed approach makes it a viable alternative to
the labour-intensive manual method of spot quality assessment. 相似文献
115.
Several studies have reported that the ensemble of classifiers can improve the performance of a stand-alone classifier. In this paper, we propose a learning method for combining the predictions of a set of classifiers.The method described in this paper uses a genetic-based version of the correspondence analysis for combining classifiers. The correspondence analysis is based on the orthonormal representation of the labels assigned to the patterns by a pool of classifiers. In this paper instead of the orthonormal representation we use a pool of representations obtained by a genetic algorithm. Each single representation is used to train a different classifiers, these classifiers are combined by vote rule.The performance improvement with respect to other learning-based fusion methods is validated through experiments with several benchmark datasets. 相似文献
116.
Giorgio Zattini Sergio Ballardini Tiziana Benelli Laura Mazzocchetti Loris Giorgini 《Polymer Engineering and Science》2019,59(12):2488-2497
Automotive interiors materials, like plasticized polyvinyl chloride (pPVC) synthetic leathers (SLs), require additives for improving their flame behavior. The preferred flame retardant (FR) used in pPVC is antimony trioxide (Sb2O3, ATO), though the use of antimony poses several issues, for both human health and the environment, related to its extraction, processing, and use. In order to investigate alternatives to ATO in high‐performance pPVC SLs, various commercial FRs have been selected and tested in a typical, highly plasticized formulation. These additives have been used either alone or combined to evaluate synergistic effects. Samples have been tested to assess mechanical properties, thermal stability, and flame resistance. Data have been compared with those of neat pPVC and a foil with 2 phr of ATO. Several FRs are effective in improving the flame response compared with neat pPVC, without compromising the other properties, in detail calcium hypophosphite and mixtures containing zinc hydroxystannate (ZHS). Finally, aluminum hydroxide and ZHS (ATH + ZHS) yields the cheaper among the alternatives here proposed, even though higher than ATO (+193%) whose price/performance ratio is difficult to overcome. POLYM. ENG. SCI., 59:2488–2497, 2019. © 2019 Society of Plastics Engineers 相似文献
117.