全文获取类型
收费全文 | 110篇 |
免费 | 6篇 |
专业分类
电工技术 | 4篇 |
化学工业 | 11篇 |
建筑科学 | 1篇 |
轻工业 | 7篇 |
无线电 | 27篇 |
一般工业技术 | 26篇 |
冶金工业 | 10篇 |
原子能技术 | 1篇 |
自动化技术 | 29篇 |
出版年
2022年 | 2篇 |
2020年 | 4篇 |
2018年 | 5篇 |
2017年 | 2篇 |
2016年 | 4篇 |
2015年 | 4篇 |
2014年 | 2篇 |
2013年 | 5篇 |
2012年 | 8篇 |
2011年 | 6篇 |
2010年 | 11篇 |
2009年 | 2篇 |
2008年 | 10篇 |
2007年 | 10篇 |
2006年 | 7篇 |
2005年 | 5篇 |
2004年 | 4篇 |
2003年 | 4篇 |
2002年 | 5篇 |
2001年 | 1篇 |
1999年 | 2篇 |
1998年 | 6篇 |
1997年 | 1篇 |
1993年 | 2篇 |
1984年 | 1篇 |
1976年 | 1篇 |
1974年 | 1篇 |
1970年 | 1篇 |
排序方式: 共有116条查询结果,搜索用时 15 毫秒
31.
Shlomi Dolev Ronen I. Kat Elad M. Schiller 《Journal of Computer and System Sciences》2010,76(8):884-900
This paper presents a shared-memory self-stabilizing failure detector, asynchronous consensus and replicated state-machine algorithm suite, the components of which can be started in an arbitrary state and converge to act as a virtual state-machine. Self-stabilizing algorithms can cope with transient faults. Transient faults can alter the system state to an arbitrary state and hence, cause a temporary violation of the safety property of the consensus. Started in an arbitrary state, the long lived, memory bounded and self-stabilizing failure detector, asynchronous consensus, and replicated state-machine suite, presented in the paper, recovers to satisfy eventual safety and eventual liveness requirements. Several new techniques and paradigms are introduced. The bounded memory failure detector abstracts away synchronization assumptions using bounded heartbeat counters combined with a balance–unbalance mechanism. The practically infinite paradigm is introduced in the scope of self-stabilization, where an execution of, say, 264 sequential steps is regarded as (practically) infinite. Finally, we present the first self-stabilizing wait-free reset mechanism that ensures eventual safety and can be used to implement efficient self-stabilizing timestamps that are of independent interest. 相似文献
32.
CD Enk S Elad A Vexler J Kapelushnik R Gorodetsky M Kirschbaum 《Canadian Metallurgical Quarterly》1998,22(12):1179-1183
Chronic graft-versus-host disease (cGVHD) is a major complication of allogeneic bone marrow transplantation. Immunosuppressive treatment regimens carry the potential of causing severe morbidity and mortality, so that additional modes of therapy with fewer side-effects are clearly needed. Five cGVHD patients (sclerodermoid cGVHD in two patients, lichenoid cGVHD in one patient and intraoral cGVHD in two patients), who had not responded to standard immunosuppressive drugs, were treated with adjuvant UVB phototherapy. The patient with lichenoid cGVHD experienced complete clearing of cutaneous lesions, whereas both patients with sclerodermoid cGVHD experienced significant relief of pruritus, but showed no change of the sclerodermoid skin lesions. Intraoral lesions cleared in one patient. The effects of UVB phototherapy were furthermore documented by measurement of skin viscoelasticity and mouth opening. No side-effects were encountered. This preliminary study suggests that UVB phototherapy is useful as an adjuvant therapeutic modality in intraoral and cutaneous lichenoid cGVHD. 相似文献
33.
34.
Elad Eisenstein 《Architectural Design》2015,85(6):92-99
Elad Eisenstein is a Director at Arup, leading the firm's urban design and masterplanning practice from London. Here he describes how through a highly customised approach, ‘catalytic urbanism’, Arup is working internationally in cities undergoing rapid change in a manner that is tailored to both global and local forces – accounting for climate change, macroeconomics and mobility. This bespoke method is illustrated in three diverse contexts: in North London, Pretoria in South Africa and Wanzhuang in China. 相似文献
35.
Elad D 《Journal of food protection》2005,68(6):1302-1305
Throughout the last decades of the 20th century, the biological threat evolved from primarily a government-controlled weapon to a tool of terrorism. One of the consequences of this trend is the near impossibility of foreseeing when and how an act of bioterrorism will occur. The suitability of food products for such an act stems from the multitude of microorganisms that may be used for contamination and the vulnerability of the products during and after processing. Tests that would enable the detection of a large variety of microorganisms quickly, reliably, and economically should also provide satisfactory means to prevent acts of malicious biocontamination of food products. Until such means become available, a priority-based approach to the problem is probably the most practical. Priorities should be determined based on a systematic risk assessment to define the relative likelihood of a certain microorganism being used in an act of malicious food contamination. Criteria to be evaluated are availability, weaponization processes, delivery of an effective dose, probability of early detection, and the microorganism's resistance to the conditions to which it will be exposed. Because the results of such an assessment may vary according to prevailing conditions, the assessment must be based on the existing circumstances. The results of the assessment should then be applied to the various procedures of food processing, which should further reduce the number of potential microbial threats. Existing methods of screening food for contaminating microorganisms and existing food safety and security procedures such as hazard analysis and critical control point programs may have to be modified to become suitable for the detection of acts of bioterrorism. 相似文献
36.
Neuromyositis is a very rare type of polymyositis where, beside the usual muscular manifestations, there are signs of peripheral neuropathy which can be found at clinical, electromyographic and/or pathological examination. We have seen between 1983 and 1990 four cases of neuromyositis. The neurological disorder was an axonopathy in two cases which is usual in neuromyositis; in the other two cases, there was a polyradiculoneuritis which seems to be very rare in this syndrome. In the four patients the disease was particularly severe and unresponsive to treatment. One of our patients had HTLV-I infection diagnosed by polymerase chain reaction amplification and in situ hybridization, while the serological test was negative. To our knowledge only three cases of HTLV-I associated neuromyositis have been reported in the literature. 相似文献
37.
The operation of ion implanted silicon position sensitive detectors at low temperatures will be described. The improved noise performance of the detector at these temperatures in both the energy and position modes will be analyzed and its implications on low energy applications will be discussed. A large part of the investigation was devoted to the study of boron implanted resistors and their noise properties both at room temperature and cryogenic temperatures. 相似文献
38.
39.
Two are Better than One: Combining ZnO and MgF2 Nanoparticles Reduces Streptococcus pneumoniae and Staphylococcus aureus Biofilm Formation on Cochlear Implants
下载免费PDF全文
![点击此处可从《Advanced functional materials》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Michal Natan Fredrik Edin Nina Perkas Gila Yacobi Ilana Perelshtein Elad Segal Alexandra Homsy Edith Laux Herbert Keppner Helge Rask‐Andersen Aharon Gedanken Ehud Banin 《Advanced functional materials》2016,26(15):2473-2481
Streptococcus pneumoniae (S. pneumoniae) and Staphylococcus aureus (S.aureus) are considered the most common colonizers of cochlear implants (CI), which have prompted the search for new ways to inhibit their growth and biofilm development. In the current study, CI‐based platforms are prepared and sonochemically coated with ZnO or MgF2 nanoparticles (NPs), two agents previously shown to possess antibacterial properties. Additionally, a method is developed for coating both ZnO and MgF2 on the same platform to achieve synergistic activity against both pathogens. Each surface is characterized, and the optimal conditions for the NP homogenous distribution on the surface are determined. The ZnO‐MgF2 surface significantly reduces the S. pneumoniae and S. aureus biofilm compared with the surfaces coated with either ZnO or MgF2, even though it contains smaller amounts of each NP type. Importantly, leaching assays show that the NPs remain anchored to the surface for at least 7 d. Finally, biocompatibility studies demonstrate that coating with low concentrations of ZnO‐MgF2 results in no toxicity toward primary human fibroblasts from the auditory canal. Taken together, these findings underscore the potential of using NP combinations such as the one presented here to efficiently inhibit bacterial colonization and growth on medical devices such as CIs. 相似文献
40.
The catalytic reactivity and selectivity of metallic nanoclusters supported on a metal-oxide can be tuned by electronic charge. In this review, different approaches for controlling the electronic properties of metallic nanoclusters and its impact on catalytic reactions are discussed. Electronic charge can transfer from the metal-oxide support to the metallic catalyst and change the metal–reactants interaction and as a consequence modify as-well the catalytic reactivity and selectivity. In other cases, the electronic properties of the metal-oxide have an active role in the catalytic process and the metal oxide can be used as a co-catalyst. Another approach is to directly change the electronic properties of the metallic catalyst. It is demonstrated that dendrimer-encapsulated metallic nanoparticles can be directly oxidized by the addition of an inorganic oxidizer to the solution phase. In this case, even while supported on inert oxides, novel catalytic reactivity and selectivity can be gained by the formation of highly oxidized metal ions. 相似文献