全文获取类型
收费全文 | 100篇 |
免费 | 1篇 |
专业分类
电工技术 | 2篇 |
化学工业 | 13篇 |
机械仪表 | 1篇 |
建筑科学 | 1篇 |
能源动力 | 3篇 |
轻工业 | 6篇 |
水利工程 | 1篇 |
无线电 | 5篇 |
一般工业技术 | 24篇 |
冶金工业 | 26篇 |
原子能技术 | 1篇 |
自动化技术 | 18篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2021年 | 3篇 |
2020年 | 1篇 |
2017年 | 2篇 |
2016年 | 2篇 |
2015年 | 2篇 |
2014年 | 1篇 |
2013年 | 8篇 |
2012年 | 3篇 |
2011年 | 4篇 |
2010年 | 2篇 |
2009年 | 3篇 |
2008年 | 6篇 |
2007年 | 8篇 |
2006年 | 3篇 |
2005年 | 2篇 |
2004年 | 4篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 3篇 |
2000年 | 2篇 |
1998年 | 5篇 |
1997年 | 5篇 |
1996年 | 3篇 |
1995年 | 3篇 |
1993年 | 4篇 |
1992年 | 3篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有101条查询结果,搜索用时 46 毫秒
1.
O. M. Jadaan N. N. Nemeth J. Bagdahn W. N. Sharpe Jr 《Journal of Materials Science》2003,38(20):4087-4113
The objective of this work is to present a brief overview of a probabilistic design methodology for brittle structures, review the literature for evidence of probabilistic behavior in the mechanical properties of MEMS (especially strength), and to investigate whether evidence exists that a probabilistic Weibull effect exists at the structural microscale. Since many MEMS devices are fabricated from brittle materials, that raises the question whether these miniature structures behave similar to bulk ceramics. For bulk ceramics, the term Weibull effect is used to indicate that significant scatter in fracture strength exists, hence requiring probabilistic rather than deterministic treatment. In addition, the material's strength behavior can be described in terms of the Weakest Link Theory (WLT) leading to strength dependence on the component's size (average strength decreases as size increases), and geometry/loading configuration (stress distribution). Test methods used to assess the mechanical properties of MEMS, especially strength, are reviewed. Four materials commonly used to fabricate MEMS devices are reviewed in this report. These materials are polysilicon, single crystal silicon (SCS), silicon nitride, and silicon carbide. 相似文献
2.
Xing Gu Shariar Sabuktagin Ali Teke Daniel Johnstone Hadis Morkoç Bill Nemeth Jeff Nause 《Journal of Materials Science: Materials in Electronics》2004,15(6):373-378
ZnO is a highly efficient photon emitter, and has optical and piezoelectric properties that are attractive for a variety of applications in sensors and potentially optoelectronic devices such as emitters. Due to its identical stacking order and close lattice match to GaN, it is also being developed as a substrate material for GaN epitaxy. However, the surface finish of the ZnO is such that much of the damage induced by sawing and follow up mechanical polishing remains. We developed a thermal treatment method to eliminate surface damage on the 0 face of ZnO (0 0 0 1) to prepare it for epitaxial growth. Atomic force microscopy images of ZnO (0 0 0 1) annealed at 1050 °C for 3 h etc. show that residual scratches from mechanical polishing are removed and atomically flat, terrace-like surfaces are attained. In addition, low-temperature photoluminescence and high-resolution X-ray diffraction measurements have been employed to investigate the effect of annealing on ZnO substrates. 相似文献
3.
Dora Szabo Zsolt Sarszegi Beata Polgar Eva Saghy Adam Nemeth Dora Reglodi Andras Makkos Aniko Gorbe Zsuzsanna Helyes Peter Ferdinandy Robert Herczeg Attila Gyenesei Attila Cziraki Andrea Tamas 《International journal of molecular sciences》2021,22(6)
Acute myocardial infarction (MI) is one of the most common causes of death worldwide. Pituitary adenylate cyclase activating polypeptide (PACAP) is a cardioprotective neuropeptide expressing its receptors in the cardiovascular system. The aim of our study was to examine tissue PACAP-38 in a translational porcine MI model and plasma PACAP-38 levels in patients with ST-segment elevation myocardial infarction (STEMI). Significantly lower PACAP-38 levels were detected in the non-ischemic region of the left ventricle (LV) in MI heart compared to the ischemic region of MI-LV and also to the Sham-operated LV in porcine MI model. In STEMI patients, plasma PACAP-38 level was significantly higher before percutaneous coronary intervention (PCI) compared to controls, and decreased after PCI. Significant negative correlation was found between plasma PACAP-38 and troponin levels. Furthermore, a significant effect was revealed between plasma PACAP-38, hypertension and HbA1c levels. This was the first study showing significant changes in cardiac tissue PACAP levels in a porcine MI model and plasma PACAP levels in STEMI patients. These results suggest that PACAP, due to its cardioprotective effects, may play a regulatory role in MI and could be a potential biomarker or drug target in MI. 相似文献
4.
Erik Hollnagel’s body of work in the past three decades has molded much of the current research approach to system safety,
particularly notions of “error”. Hollnagel regards “error” as a dead-end and avoids using the term. This position is consistent
with Rasmussen’s claim that there is no scientifically stable category of human performance that can be described as “error”.
While this systems view is undoubtedly correct, “error” persists. Organizations, especially formal business, political, and
regulatory structures, use “error” as if it were a stable category of human performance. They apply the term to performances
associated with undesired outcomes, tabulate occurrences of “error”, and justify control and sanctions through “error”. Although
a compelling argument can be made for Hollnagel’s view, it is clear that notions of “error” are socially and organizationally
productive. The persistence of “error” in management and regulatory circles reflects its value as a means for social control. 相似文献
5.
Nemeth C.P. Cook R.I. O'Connor M. Klock P.A. 《IEEE transactions on systems, man, and cybernetics. Part A, Systems and humans : a publication of the IEEE Systems, Man, and Cybernetics Society》2004,34(6):726-735
Studies of patient safety have identified gaps in current work including the need for research about communication and information sharing among healthcare providers. They have also encouraged the use of decision support tools to improve human performance. Distributed cognition is the shared awareness of goals, plans, and details that no single individual grasps. Cognitive artifacts are objects such as: schedules, display boards, lists, and worksheets that form part of a distributed cognition. Cognitive artifacts that are related to operating room (OR) scheduling include: the availabilities sheet, master schedule, OR graph, and OR board. All provide a "way in" to understand how teams in the acute care setting dynamically plan and manage the balance between demand for care and the resources available to provide it. This work has import for the way that information technology supports the organization, management, and use of healthcare resources. Better computer-supported cognitive artifacts will benefit patient safety by making teamwork processes, planning, communications, and resource management more resilient. 相似文献
6.
Jana Dulle Silke Nemeth Ekaterina V. Skorb Torsten Irrgang Jürgen Senker Rhett Kempe Andreas Fery Daria V. Andreeva 《Advanced functional materials》2012,22(15):3128-3135
This paper proposes a sonochemical approach to the nanostructuring of Al/Ni catalyst with high content of accessible Ni centers and a high reusability. The surface and bulk composition as well as pore size distribution of this catalyst are controlled synergistically by adjusting the ultrasound intensity in aqueous solution. Sonochemical activation of Al/Ni alloy leads to formation of mesoporous Al/Ni metallic based frameworks with surface area up to 125 m2 g?1, and regular distribution of nickel active center in the porous matrix. One of the opportunities of porous Al/Ni catalyst is that due to a time‐resolved controllable formation of protective oxide layer it can be stored and handled under air in comparison to traditional Raney catalysts which need inert conditions. The Al/Ni catalyst is characterized by scanning electron microscopy (SEM), electron diffraction spectroscopy (EDS), X‐ray photoelectron spectroscopy (XPS), confocal scanning fluorescence microscopy (CSFM), solid‐state NMR experiments, and powder X‐ray diffraction analysis (PXRD). The catalytic activity was investigated for the hydrogenation of acetophenone. 相似文献
7.
Christopher P. Nemeth 《Cognition, Technology & Work》2007,9(3):127-130
The first special issue in Large-Scale Coordination earlier this year showed the breadth of application research from air
traffic control to the military and multi-agency emergency response. This special issue shows depth of research at large scale
in healthcare. These studies of large-scale coordination examine work between and across groups, beyond earlier conceptions
of social human factors. Revealing the complexity of work domains and the subtle, yet effective, ways that workers negotiate
its challenges opens the way to develop information and communications technology support tools that are grounded in a scientific
understanding. 相似文献
8.
Nemeth J.G. Vargha B. Kollar I. 《IEEE transactions on instrumentation and measurement》2000,49(6):1260-1263
System identification is an inherently iterative process. Yet, limited attempts have been made so far to implement the whole identification loop in a single device. This paper discusses the difficulties of the task and presents a solution based on a Matlab toolbox and a set of virtual instruments. During the identification session, the obtained models may call for refinement or validation by new experiments. Using this integrated software-hardware tool, these subsequent experiments can be accomplished online with the identification procedure. As a demonstration, the modeling of a hairdryer is described. The universal applicability of this solution is believed to be guaranteed by the modular architecture of virtual instrumentation and the general definition of the software interface developed. The interface allows combining Matlab-based identification packages with virtual instruments or pure hardware interfaced to Matlab 相似文献
9.
Nemeth Charlan; Mayseless Ofra; Sherman Jeffrey; Brown Yvonne 《Canadian Metallurgical Quarterly》1990,58(3):429
Recent work on minority influence has led to a debate about whether majorities and minorities exercise different forms of influence. C. L. Nemeth (see record 1986-14271-001) has argued that consistent minorities induce different cognitive processes than do consistent majorities, with a resulting impact on the quality of the judgments rendered. Two experiments test this theory. In Experiment 1, Ss heard 3 tape-recorded lists of words and learned that either a minority or a majority differed in the category "first noticed." This feedback occurred either once or over 3 trials. When exposure was once, recall was not affected by the source; when it was consistent, Ss exposed to the minority view recalled more words than those exposed to the majority view. In Experiment 2, Ss were exposed to a minority view that was either consistent over time or inconsistent over time. Ss exposed to a consistent minority had better recall than control Ss. Exposure to an inconsistent minority did not improve recall. The results offer support for the Nemeth formulation. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
10.
E. Renaot Y. Hermier M. H. Valin G. Bonnier F. Adunka A. Van Der Linden M. Dobre M. Šmíd A. Bronnum T. Weckstrom E. Tegeler U. Noatsch M. Anagnostou E. Turzo-Andras S. Nemeth M. White P. Marcarino P. Steur A. Pauzha V. Augevicius M. de Groot J. Nielsen F. Helgesen W. Roszkowski E. Grudniewicz R. Kuna E. Filipe I. Lobo S. Gaita V. Chimenti J. Ivarsson S. Duris J. Ranostaj J. Bojkovski A. Steiner S. Ugur J. Gray S. Bruce R. Rusby D. Head 《International Journal of Thermophysics》2008,29(3):991-1000
The EUROMET.T-K3 comparison is the regional extension of CCT-K3. The comparison involved the six European national metrology
institutes (NMIs) previously involved in CCT-K3 (LNE-INM/CNAM, SMU, INRiM, NMi-VSL, NPL, PTB) and 18 additional European national
laboratories. The comparison was divided into five different loops, each coordinated by a co-pilot chosen from the laboratories
having participated in the CCT-K3 comparison. LNE-INM/CNAM played the role of pilot in linking the five loops. In each loop,
an artifact in the form of a standard platinum resistance thermometer (SPRT, 25 Ω) was circulated among the participating
laboratories. To have sufficient information about the possible drift of the SPRTs, the co-pilots performed a calibration
over the full temperature range at the beginning and at the end of the loop. A EUROMET reference value (ERV), taking into
account the whole comparison, was defined, and the differences (T
Lab − T
ERV) were calculated with the associated uncertainties. The method for establishing the link between the participants in CCT-K3
and in EUROMET.T-K3 is described.
Institut National de Métrologie (BNM-INM/CNAM at the time of the comparison, LNE-INM/CNAM since 1 January 2005), Paris, France. 相似文献