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101.
Belén Díaz Emma Härkönen Jolanta ?wiatowska Vincent Maurice Antoine Seyeux Philippe Marcus Mikko Ritala 《Corrosion Science》2011,(6):2168-2175
ToF-SIMS, XPS, voltammetry and EIS investigation of the anti-corrosion properties of thin (10, 50 and 100 nm) alumina coatings grown by atomic layer deposition at 160 °C on steel is reported. Surface analysis shows a thickness-independent Al2O3 stoichiometry of the coating and trace contamination by the growth precursors. The buried coating/alloy interface has iron oxide formed in ambient air and/or resulting from the growth of spurious traces in the initial stages of deposition. Electrochemical analysis yields an exponential decay of the coating porosity over four orders of magnitude with increasing thickness, achieved by sealing of the more defective first deposited 10 nm. 相似文献
102.
Flavio P. Junqueira Keith Marzullo Maurice Herlihy Lucia Draque Penso 《Distributed Computing》2010,23(2):135-149
Many replication protocols employ a threshold model when expressing failures they are able to tolerate. In this model, one assumes that no more than t out of n components can fail, which is a good representation when failures are independent and identically distributed (IID). In many
real systems, however, failures are not IID, and a straightforward application of threshold protocols yields suboptimal results.
Here, we examine the problem of transforming threshold protocols into survivor-set protocols tolerating dependent failures.
Our main goal is to show the equivalence between the threshold model and the core/survivor set model. Toward this goal, we
develop techniques to transform threshold protocols into survivor set ones. Our techniques do not require authentication,
self-verification or encryption. Our results show in one case that we can transform a threshold protocol to a subset by spreading
a number of processes across processors. This technique treats a given threshold algorithm as a black box, and consequently
can transform any threshold algorithm. However, it has the disadvantage that the transformation is not possible for all sets
of survivor sets. The second technique instead focuses on transforming voters: functions that evaluate to a value out of a set of tallied values in a replication protocol. Voters are an essential part
of many fault-tolerant protocols, and we show a universal way of transforming them. With such a transformation we expect that
a large number of protocols in the literature can be directly transformed with our technique. It is still an open problem,
however, if the two models are equivalent, and our results constitute an important first step in this direction. 相似文献
103.
Knight Raymond A.; Manoach Dara S.; Elliott David S.; Hershenson Maurice 《Canadian Metallurgical Quarterly》2000,109(4):575
The hypothesis that the perceptual organization dysfunction of patients with poor premorbid schizophrenia is due to a deficit in global visual sensory store processing was tested by assessing their ability to process symmetrical configurations that develop early and have strong prepotent structures. Two same–different judgment tasks in which performance varies as a function of the symmetrical organization and task demands were administered to participants with good and poor premorbid schizophrenia, those with mood disorders, and normal controls. Like the other groups, poor premorbid schizophrenics' latency and error response patterns closely paralleled the a priori model of adequate processing. The results support their competence in perceptually processing symmetrical configurations and disconfirm the hypothesis that their input deficiencies represent a general deficiency in all forms of perceptual organization. The implications for specifying their early input dysfunction are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
104.
Conrod Patricia J.; Stewart Sherry H.; Pihl Robert O.; C?té Sylvana; Fontaine Veronique; Dongier Maurice 《Canadian Metallurgical Quarterly》2000,14(3):231
Female substance abusers recruited from the community were randomly assigned to receive 1 of 3 brief interventions that differentially targeted their personality and reasons for drug use. The 90-min interventions were: (a) a motivation-matched intervention involving personality-specific motivational and coping skills training, (b) a motivational control intervention involving a motivational film and a supportive discussion with a therapist, and (c) a motivation-mismatched intervention targeting a theoretically different personality profile. Assessment 6 months later (N?=?198) indicated that only the matched intervention proved to be more effective than the motivational control intervention in reducing frequency and severity of problematic alcohol and drug use and preventing use of multiple medical services. These findings indicate promise for a client-treatment matching strategy that focuses on personality-specific motives for substance abuse. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
105.
Disassembly is a critical step to increase the value of end-of-life (EOL) products and to reduce the environmental footprint. Despite worldwide efforts, disassembly is still performed manually due to the uncertainty associated with the quality and the quantity of the returned EOL products. In this paper, a cognitive robotics based system is proposed to address this problem. The system is equipped with four cognitive functions: reasoning, execution monitoring, learning and revision. The proposed system is tested using LCD screens. The results show that the system is flexible enough to deal with any product models without prior information. 相似文献
106.
Drift is a common phenomenon in active sensors and, if left untreated, is generally the limiting factor in their performance. It is shown that drift and spread in sensor characteristics are tightly interwoven due to finite sensitivity to biasing parameters. Modern treatments of drift are dynamical under operating conditions, notably so chopping, the sensitivity variation method and the recently introduced van Putten-method. These methods differ in regards to drift-dependence on biasing. In their application to silicon flow sensors, the first two reduce but do not eliminate drift. The geometric van Putten-method leaves biasing invariant, which eliminates drift and obtains uniform sensor-characteristics leaving drift-free operation. 相似文献
107.
Annals of Telecommunications - L’effet tunnel entre deux métaux permet de représenter la non-linéarité d’une diode mim (métal-isolantmétal). Le schéma... 相似文献
108.
Across 2 experiments, the authors demonstrate that emotional states influence how receptive people are to advice. The focus of these experiments is on incidental emotions, emotions triggered by a prior experience that is irrelevant to the current situation. The authors demonstrate that people who feel incidental gratitude are more trusting and more receptive to advice than are people in a neutral emotional state, and people in a neutral state are more trusting and more receptive to advice than are people who feel incidental anger. In these experiments, greater receptivity to advice increased judgment accuracy. People who felt incidental gratitude were more accurate than were people in a neutral state, and people in a neutral state were more accurate than were people who felt incidental anger. The results offer insight into how people use advice, and the authors identify conditions under which leaders, policy makers, and advisors may be particularly influential. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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