全文获取类型
收费全文 | 1482篇 |
免费 | 77篇 |
国内免费 | 3篇 |
专业分类
电工技术 | 19篇 |
综合类 | 2篇 |
化学工业 | 288篇 |
金属工艺 | 22篇 |
机械仪表 | 27篇 |
建筑科学 | 81篇 |
矿业工程 | 1篇 |
能源动力 | 45篇 |
轻工业 | 107篇 |
水利工程 | 15篇 |
石油天然气 | 2篇 |
无线电 | 80篇 |
一般工业技术 | 414篇 |
冶金工业 | 193篇 |
原子能技术 | 12篇 |
自动化技术 | 254篇 |
出版年
2024年 | 2篇 |
2023年 | 10篇 |
2022年 | 24篇 |
2021年 | 41篇 |
2020年 | 20篇 |
2019年 | 27篇 |
2018年 | 33篇 |
2017年 | 30篇 |
2016年 | 38篇 |
2015年 | 44篇 |
2014年 | 70篇 |
2013年 | 87篇 |
2012年 | 91篇 |
2011年 | 134篇 |
2010年 | 88篇 |
2009年 | 80篇 |
2008年 | 101篇 |
2007年 | 114篇 |
2006年 | 88篇 |
2005年 | 87篇 |
2004年 | 54篇 |
2003年 | 48篇 |
2002年 | 38篇 |
2001年 | 27篇 |
2000年 | 17篇 |
1999年 | 17篇 |
1998年 | 15篇 |
1997年 | 17篇 |
1996年 | 11篇 |
1995年 | 11篇 |
1994年 | 8篇 |
1993年 | 9篇 |
1992年 | 8篇 |
1991年 | 3篇 |
1990年 | 13篇 |
1989年 | 9篇 |
1988年 | 8篇 |
1987年 | 7篇 |
1986年 | 2篇 |
1984年 | 4篇 |
1983年 | 5篇 |
1982年 | 5篇 |
1981年 | 3篇 |
1980年 | 1篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1977年 | 4篇 |
1975年 | 2篇 |
1974年 | 1篇 |
1973年 | 1篇 |
排序方式: 共有1562条查询结果,搜索用时 15 毫秒
81.
82.
Muran J. Christopher; Safran Jeremy D.; Gorman Bernard S.; Samstag Lisa Wallner; Eubanks-Carter Catherine; Winston Arnold 《Canadian Metallurgical Quarterly》2009,46(2):233
This study examined the relationship of early alliance ruptures and their resolution to process and outcome in a sample of 128 patients randomly assigned to 1 of 3 time-limited psychotherapies for personality disorders: cognitive–behavioral therapy, brief relational therapy, or short-term dynamic psychotherapy. Rupture intensity and resolution were assessed by patient- and therapist-report after each of the first 6 sessions. Results indicated that lower rupture intensity and higher rupture resolution were associated with better ratings of the alliance and session quality. Lower rupture intensity also predicted good outcome on measures of interpersonal functioning, while higher rupture resolution predicted better retention. Patients reported fewer ruptures than did therapists. In addition, fewer ruptures were reported in cognitive–behavioral therapy than in the other treatments. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
83.
Thomas E. Fricker Jeremy E. Oakley Neil D. Sims Keith Worden 《Mechanical Systems and Signal Processing》2011,25(8):2962-2975
This paper introduces methods for probabilistic uncertainty analysis of a frequency response function (FRF) of a structure obtained via a finite element (FE) model. The methods are applicable to computationally expensive FE models, making use of a Bayesian metamodel known as an emulator. The emulator produces fast predictions of the FE model output, but also accounts for the additional uncertainty induced by only having a limited number of model evaluations. Two approaches to the probabilistic uncertainty analysis of FRFs are developed. The first considers the uncertainty in the response at discrete frequencies, giving pointwise uncertainty intervals. The second considers the uncertainty in an entire FRF across a frequency range, giving an uncertainty envelope function. The methods are demonstrated and compared to alternative approaches in a practical case study. 相似文献
84.
The field of energy management is an area increasingly studied. However, most solutions are based on centralized systems and barely fulfil criterion like fault tolerance or adaptability. Also, these systems are often difficult to design because of the “top–down” approach used: the designer generally knows how each component has to respond separately, but a centralized management system focuses his attention solely on the overall reaction of the system. That is why a distributed management solution based on the paradigm of Multi-Agent Systems (MASs) is proposed in this paper. In addition to a more natural conception, based on a “bottom–up” approach, this solution ensures better system reliability. After reviewing the previous works, an application of MAS to power management in a hybrid power source is presented. Then, the system is tested using a simulation model. The results show that this approach is perfectly valid and can respond to most problems of centralized energy management systems (EMSs). 相似文献
85.
Abstract The Water Poverty Index is an integrated tool developed on the basis of extensive consultation with a range of scientists, practitioners and policymakers. It is primarily designed for use at the community level to enable more holistic water-resource assessments on a site-specific basis. It can however be applied at different scales to suit different needs. One of the motivations to design such a tool was an attempt to move away from the conventional, purely deterministic, approaches to water assessment, relying primarily on models and large-scale data. In today's world such an approach is inappropriate, ill representing the complexities of modern water-allocation decisions where economic, political and social issues all have a powerful role to play. This paper highlights some applications of the Water Poverty Index at different spatial scales and discusses the implications of applying indicators at these different scales. 相似文献
86.
Collaborative Information Seeking 总被引:1,自引:0,他引:1
An examination of the roles and dimensions of collaborative search reveals new opportunities for information-seeking support tools. 相似文献
87.
88.
Presents an interview that was conducted by Jeremy Safran with Lewis Aron on the topic of psychoanalysis. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
89.
Jeremy 《中国眼镜科技杂志》2018,(14)
正从国民初恋到学霸少年,从天才侦探到高冷音乐人,少年成名,十几岁的他收获了万千宠爱。荧幕上,他青春无敌,穿梭在不同角色之间,彷佛有他的地方就满是青春荷尔蒙气息,极具个人特征的虎牙和笑脸,都是我们最爱的少年气。逆天资源背后的开挂推手1997年,刘昊然出生在河南省的一个普通家庭,11岁那年考上了北京舞蹈学院附中,于是刚刚小学毕业的他就开启了北漂的求学生活。 相似文献
90.
Jeremy C. Maxwell Annie I. Antón Peter Swire Maria Riaz Christopher M. McCraw 《Requirements Engineering》2012,17(2):99-115
Companies must ensure their software complies with relevant laws and regulations to avoid the risk of costly penalties, lost reputation, and brand damage resulting from non-compliance. Laws and regulations contain internal cross-references to portions of the same legal text, as well as cross-references to external legal texts. These cross-references introduce ambiguities, exceptions, as well as other challenges to regulatory compliance. Requirements engineers need guidance as to how to address cross-references in order to comply with the requirements of the law. Herein, we analyze each external cross-reference within the U.S. Health Insurance Portability and Accountability Act (HIPAA) Privacy Rule, the Gramm?CLeach?CBliley Act (GLBA), and the GLBA Financial Privacy Rule to determine whether a cross-reference either introduces a conflicting requirement, a conflicting definition, or refines an existing requirement. Herein, we propose a legal cross-reference taxonomy to aid requirements engineers in classifying cross-references as they specify compliance requirements. Analyzing cross-references enables us to address conflicting requirements that may otherwise thwart legal compliance. We identify five sets of conflicting compliance requirements and recommend strategies for resolving these conflicts. 相似文献