全文获取类型
收费全文 | 59篇 |
免费 | 2篇 |
国内免费 | 5篇 |
专业分类
电工技术 | 1篇 |
综合类 | 10篇 |
化学工业 | 2篇 |
建筑科学 | 9篇 |
矿业工程 | 4篇 |
能源动力 | 1篇 |
轻工业 | 6篇 |
水利工程 | 1篇 |
无线电 | 1篇 |
一般工业技术 | 4篇 |
冶金工业 | 12篇 |
自动化技术 | 15篇 |
出版年
2021年 | 1篇 |
2020年 | 1篇 |
2019年 | 2篇 |
2018年 | 1篇 |
2017年 | 1篇 |
2016年 | 1篇 |
2015年 | 1篇 |
2014年 | 2篇 |
2013年 | 5篇 |
2011年 | 1篇 |
2010年 | 2篇 |
2009年 | 4篇 |
2008年 | 6篇 |
2007年 | 7篇 |
2006年 | 8篇 |
2005年 | 5篇 |
2004年 | 2篇 |
2003年 | 1篇 |
2002年 | 1篇 |
2001年 | 4篇 |
2000年 | 1篇 |
1997年 | 1篇 |
1994年 | 1篇 |
1991年 | 1篇 |
1989年 | 3篇 |
1963年 | 1篇 |
1962年 | 1篇 |
1955年 | 1篇 |
排序方式: 共有66条查询结果,搜索用时 31 毫秒
1.
为了有效提高低分辨率图像的人脸疲劳表情识别性能,提出一种基于稀疏表示的低分辨率人脸疲劳表情的识别方法。首先,采用肯德尔和谐系数可信度分析法构建了低分辨率人脸疲劳表情图像库TIREDFACE。其次,通过图像库中的低分辨率样本疲劳表情图像进行稀疏表示,再利用压缩感知理论寻求低分辨率测试样本的最稀疏解,采用求得的最稀疏解实现低分辨率人脸疲劳表情的分类。在低分辨率人脸视觉特征的疲劳表情图像库TIREDFACE的实验测试结果表明,将该方法用于低分辨人脸疲劳表情识别,性能优于线性法、最近邻法、支持向量机以及最近邻子空间法。可见,该方法用于低分辨率人脸疲劳表情识别时识别效果较好,精确度较高。 相似文献
2.
3.
分析了城乡和区域统筹背景下基础设施建设存在的问题:传统的基础设施建设注重各行政界限内部小范围的系统性,忽视大区域的协调统筹;注重城市基础设施的配置,忽视乡村基础设施的建设.从规划的角度剖析造成这些问题的原因.就如何实现基础设施建设的区域和城乡统筹,提出相关的措施和建议. 相似文献
4.
首先在传统的粗糙集模型基础上,通过松弛对象之间的不可分辨和相容性条件,给出了一种基于和谐关系的扩展粗糙集模型;在新模型的基础上,提出了一种新的层次聚类方法;给出一个具体的实例对新的模型加以解释说明。 相似文献
5.
Parent and child beliefs about the child's mood disorder and need for treatment may affect the willingness of the patient and his or her family to participate in and adhere to treatment recommendations. Such beliefs may also affect mental health treatment outcomes. However, there is a paucity of research in this area, which is further reflected in a lack of assessment instruments. The present study describes the creation and initial psychometric evaluation of parent and child versions of the Treatment Beliefs Questionnaire (TBQ) in a sample of 8- to 11-year-old children with a primary mood disorder and comorbid psychiatric conditions. Preliminary results support the reliability and validity of these scales in this population. The role of health beliefs in mental health treatment adherence and treatment outcome is addressed. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
6.
"The literature regarding concordance rates with respect to schizophrenia among relatives of both sexes is reviewed. These rates are generally found to be higher for female than male pairs and higher for same-sexed than opposite-sexed pairs of relatives in primary family groups, but not among collateral relatives. The possible role of sampling errors, genetic contributions, and psychological factors in generating such sex-concordance ratios is examined." (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
7.
介绍了构建“人车和谐”的居住区动态交通规划目标,探讨了实现“人车和谐”的规划原则、要点和方法,并在湘南某居住区项目的动态交通规划中运用和验证。 相似文献
8.
分析了城市中新建筑的文化特性以及城市整体和谐的设计,针对新旧建筑文化的和谐问题,从哲学到建筑理论,找到了解决新与旧问题的结点,保证城市的稳定与协调发展。 相似文献
9.
Evaluation of bivariate Archimedean and elliptical copulas to model wind power dependency structures 总被引:1,自引:0,他引:1
Henry Louie 《风能》2014,17(2):225-240
When modeling wind power from several sources, consideration of the dependency structure of the sources is of critical importance. Failure to appropriately account for the dependency structure can lead to unrealistic models, which may result in erroneous conclusions from wind integration studies and other analyses. The dependency structure is fully described by the multivariate joint distribution function of the wind power. However, few—if any—explicit joint distribution models of wind power exist. Instead, copulas can be used to create joint distribution functions, provided that the selected copula family reasonably approximates the dependency structure. Unfortunately, there is little guidance on which copula family should be used to model wind power. The purpose of this paper is to investigate which copula families are best suited to model wind power dependency structures. Bivariate copulas are considered in particular. The paper focuses on power from wind plants—collections of wind turbines with a common interconnection point—but the methodology can be generally extended to consider power from individual wind turbines or even aggregate wind power from entire systems. Twelve Archimedean and elliptical copulas are evaluated using hourly data from 500 wind plant pairs in the National Renewable Energy Laboratory's Eastern Dataset. The evaluation is based on χ2 and Cramér‐von Mises statistics. Application guidelines recommending which copula family to use are developed. It is shown that a default assumption of Gaussian dependence is not justified and that the use of Gumbel copulas can result in improved models. An illustrative example shows the application of the guidelines to model dependence of wind power sources in Monte Carlo simulations. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
10.