全文获取类型
收费全文 | 120篇 |
免费 | 11篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 13篇 |
金属工艺 | 1篇 |
机械仪表 | 3篇 |
建筑科学 | 2篇 |
能源动力 | 1篇 |
轻工业 | 10篇 |
无线电 | 19篇 |
一般工业技术 | 54篇 |
冶金工业 | 13篇 |
原子能技术 | 1篇 |
自动化技术 | 13篇 |
出版年
2024年 | 1篇 |
2022年 | 6篇 |
2021年 | 3篇 |
2020年 | 4篇 |
2019年 | 1篇 |
2018年 | 6篇 |
2017年 | 6篇 |
2016年 | 2篇 |
2015年 | 3篇 |
2014年 | 2篇 |
2013年 | 9篇 |
2012年 | 4篇 |
2011年 | 10篇 |
2010年 | 5篇 |
2009年 | 3篇 |
2008年 | 11篇 |
2007年 | 10篇 |
2006年 | 6篇 |
2005年 | 3篇 |
2004年 | 3篇 |
2003年 | 2篇 |
2002年 | 3篇 |
2001年 | 3篇 |
2000年 | 3篇 |
1999年 | 2篇 |
1998年 | 5篇 |
1997年 | 2篇 |
1996年 | 2篇 |
1995年 | 3篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1985年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有131条查询结果,搜索用时 281 毫秒
1.
Pedrini Matteo Langella Valentina Battaglia Mario Alberto Zaratin Paola 《Scientometrics》2018,114(3):1227-1250
Scientometrics - In recent year, a growing attention is dedicated to the assessment of research’s social impact. While prior research has often dealt with results of research, the last decade... 相似文献
2.
Carlos Elias Helio Lopes Victor Vieira Leticia Souza Márcia Vieira 《Journal of Materials Engineering and Performance》2014,23(7):2533-2538
This study analyzed the influences of manufacturing process (twisting and machining) and surface finishing on the angular distortion, maximum torque, and toughness of two NiTi endodontic instruments (Race—FKG Dentaire and TF—Twisted Files, SybronEndo). Statistical analysis of results showed that TF instruments (twisted) had higher distortion angle (p < 0.05) and lower maximum torque to fracture (p < 0.05) than Race instruments (machined). SEM analysis of fractured instruments showed a surface morphology characteristic of ductile fracture, with plastic deformation in the helical shafts. The results suggest that both instruments are equally suitable for clinical applications. This study is purely scientific as it evaluates only some material properties, and is not intended to endorse a commercial product. 相似文献
3.
Petronetto Fabiano Paiva Afonso Lage Marcos Tavares Geovan Lopes Helio Lewiner Thomas 《IEEE transactions on visualization and computer graphics》2010,16(2):338-349
Vector fields analysis traditionally distinguishes conservative (curl-free) from mass preserving (divergence-free) components. The Helmholtz-Hodge decomposition allows separating any vector field into the sum of three uniquely defined components: curl free, divergence free and harmonic. This decomposition is usually achieved by using mesh-based methods such as finite differences or finite elements. This work presents a new meshless approach to the Helmholtz-Hodge decomposition for the analysis of 2D discrete vector fields. It embeds into the SPH particle-based framework. The proposed method is efficient and can be applied to extract features from a 2D discrete vector field and to multiphase fluid flow simulation to ensure incompressibility. 相似文献
4.
Carpintero Helio; Lafuente Enrique; Quintana José; Ruiz Gabriel; Sáiz Dolors; Sáiz Milagros; Sánchez Natividad 《Canadian Metallurgical Quarterly》2010,13(3):277
History of Psychology has been an extremely active field for many years in Spain. Both the great expansion of psychological studies and the inclusion of history as a compulsory subject in the psychology curriculum are crucial factors helping to understand the current state of affairs. The aim of this paper is to provide a survey of the work done in this area over the last decade, covering research, teaching, and institutional developments. The study includes consideration of aspects such as main research lines, major theoretical and methodological trends, teaching materials, relevant archives and exhibits, and significant websites. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
5.
Helio Fiori de Castro Katia Lucchesi Cavalca Lucas Ward Franco de Camargo Nicoló Bachschmid 《Mechanical Systems and Signal Processing》2010,24(6):1785-1798
This paper discusses the identification of parameters in rotary systems, namely, the unbalance magnitude, phase and position in the rotor system. These parameters can be identified using the measured orbits in the hydrodynamic bearings. The oil film forces are evaluated in the different positions of the orbit of the journal and are applied to the model of the shaft. The model, integrated in time domain, allows with an assumed unbalance, to simulate the orbits. The objective function is basically the difference between measured and simulated orbits, and its minimum corresponds to the identified unbalance amount, phase and position along the shaft. With respect to traditional model based identification procedures, this approach using oil film forces instead of oil film linearized stiffness and damping coefficients, and unfiltered orbits instead of 1X vibration components is suitable to deal with non-linear behaviour of the system. 相似文献
6.
Helio Langoni Carolina Polo Camargo da Silva Marcella Zampoli Troncarelli Alessandra Tata Katia Roberta Anacleto Belaz Marcos Nogueira Eberlin Samea Fernandes Joaquim Felipe Freitas Guimarães Renata Bonini Pardo Eduardo Nardini Gomes 《Journal of dairy science》2017,100(6):4287-4289
Corynebacterium bovis is a mastitis-causing microorganism responsible for economic losses related to decrease in milk production. The aim of the study was identify Corynebacterium spp. strains recovered from milk samples of subclinical mastitis by using matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). Samples were collected during a 10-mo mastitis-monitoring program in a high-production dairy farm. In this study, 80 strains were analyzed; from these 54 (67.5%) were identified at species level as Corynebacterium bovis, 24 (31.2%) isolates were identified at the genus level as Corynebacterium spp., and only 1 (1.35%) isolated had unreliable identification. Results demonstrated that MALDI-MS could be an important technique for the identification of Corynebacterium spp. in milk. 相似文献
7.
Intrusion Detection System for Wireless Sensor Networks Using Danger Theory Immune-Inspired Techniques 总被引:1,自引:0,他引:1
Helio Mendes Salmon Claudio M. de Farias Paula Loureiro Luci Pirmez Silvana Rossetto Paulo Henrique de A. Rodrigues Rodrigo Pirmez Flávia C. Delicato Luiz Fernando R. da Costa Carmo 《International Journal of Wireless Information Networks》2013,20(1):39-66
An IDS framework inspired in the Human Immune System to be applied in the wireless sensor network context is proposed. It uses an improved decentralized and customized version of the Dendritic Cell Algorithm, which allows nodes to monitor their neighborhood and collaborate to identify an intruder. The work was implemented and tested both in simulation and in real sensor platform scenarios, comparing them to each other and was also compared to a Negative Selection Theory implementation in order to demonstrate its efficiency in detecting a denial-of-sleep attack and in energy consumption. Results demonstrated the success of the proposal. 相似文献
8.
9.
10.
Presents reflections on Josef Maria Bro?ek's contributions toward the development of psychology in the nation of Spain. The author recounts that Bro?ek became one of our most enthusiastic supporters and advisors. He also encouraged us to go ahead with the project of the Revista de Historia de la Psicologia, a journal on the history of psychology that we had created in 1980 at the University of Valencia. This journal, now entering its 25th year of existence, offers an average of 500 pages per year--in Spanish or English--devoted to its topic. It is the only living journal on the specialty published in Spanish, and it includes most of the world's specialists among its authors. From the very first issue, Bro?ek became a member of its advisory committee, and a Festschrift was published in his honor in 1984 (Revista de Historia de la Psicologia, Vol. 5, No. 1-2). This volume turned out to be a true international monograph on the history of psychology, as was only natural considering the many connections held by Bro?ek at the time. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献