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51.
52.
Shu L Schlüter AD Ecker C Severin N Rabe JP 《Angewandte Chemie (International ed. in English)》2001,40(24):4666-4669
53.
Christof Külske 《Journal of statistical physics》2001,104(5-6):991-1012
We consider the Kac–Ising model in an arbitrary configuration of local magnetic fields =
, in any dimension d, at any inverse temperature. We investigate the Gibbs properties of the 'renormalized' infinite volume measures obtained by block averaging any of the Gibbs-measures corresponding to fixed , with block-length small enough compared to the range of the Kac-interaction. We show that these measures are Gibbs measures for the same renormalized interaction potential. This potential depends locally on the field configuration and decays exponentially, uniformly in , for which we give explicit bounds. The construction of the potential is based on a high temperature-type cluster expansion. 相似文献
54.
In this contribution we discuss the role disordered (or random) systems have played in the study of non-Gibbsian measures.
This role has two main aspects, the distinction between which has not always been fully clear: 1) From disordered systems: Disordered systems can be used as a tool; analogies with, as well as results and methods from the study
of random systems can be employed to investigate non-Gibbsian properties of a variety of measures of physical and mathematical
interest. 2) Of disordered systems: Non-Gibbsianness is a property of various (joint) measures describing quenched disordered systems. We
discuss and review this distinction and a number of results related to these issues. Moreover, we discuss the mean-field version
of the non-Gibbsian property, and present some ideas how a Kac limit approach might connect the finite-range and the mean-field
non-Gibbsian properties. 相似文献
55.
56.
Dr. Stefan Giselbrecht Dr. Bastian E. Rapp Prof. Dr. Christof M. Niemeyer 《Angewandte Chemie (International ed. in English)》2013,52(52):13942-13957
The term “cyborg” refers to a cybernetic organism, which characterizes the chimera of a living organism and a machine. Owing to the widespread application of intracorporeal medical devices, cyborgs are no longer exclusively a subject of science fiction novels, but technically they already exist in our society. In this review, we briefly summarize the development of modern prosthetics and the evolution of brain–machine interfaces, and discuss the latest technical developments of implantable devices, in particular, biocompatible integrated electronics and microfluidics used for communication and control of living organisms. Recent examples of animal cyborgs and their relevance to fundamental and applied biomedical research and bioethics in this novel and exciting field at the crossroads of chemistry, biomedicine, and the engineering sciences are presented. 相似文献
57.
Fischer RF Baltes C Weiss K Pazhenkottil A Rudin M Boesiger P Kozerke S 《Journal of magnetic resonance (San Diego, Calif. : 1997)》2011,211(1):80-88
In this work Linear Response Equilibrium (LRE) and Echo-planar spectroscopic imaging (EPSI) are compared in terms of sensitivity per unit time and power deposition. In addition an extended dual repetition time scheme to generate broad stopbands for improved inherent water suppression in LRE is presented. The feasibility of LRE and EPSI for assessing cholesterol esters in human carotid plaques with high spatial resolution of 1.95×1.15×1.15 mm(3) on a clinical 3T MR system is demonstrated. In simulations and phantom experiments it is shown that LRE has comparable but lower sensitivity per unit time relative to EPSI despite stronger signal generated. This relates to the lower sampling efficiency in LRE relative to EPSI as a result of limited gradient performance on clinical MR systems. At the same time, power deposition of LRE is significantly reduced compared to EPSI making it an interesting niche application for in vivo high field spectroscopic imaging of metabolites within a limited bandwidth. 相似文献
58.
Jing Wang Christof Asbach Heinz Fissan Tim Hülser Thomas A. J. Kuhlbusch Drew Thompson David Y. H. Pui 《Journal of nanoparticle research》2011,13(4):1373-1387
Nanotechnology has great potential to transform science and industry in the fields of energy, material, environment, and medicine.
At the same time, more concerns are being raised about the occupational health and safety of nanomaterials in the workplace
and the implications of nanotechnology on the environment and living systems. Studies on environmental, health, and safety
(EHS) issues of nanomaterials have a strong influence on public acceptance of nanotechnology and, eventually, affect its sustainability.
Oversight and regulation by government agencies and non-governmental organizations (NGOs) play significant roles in ensuring
responsible and environmentally friendly development of nanotechnology. The EHS studies of nanomaterials can provide data
and information to help the development of regulations and guidelines. We present research results on three aspects of EHS
studies: physico-chemical characterization and measurement of nanomaterials; emission, exposure, and toxicity of nanomaterials;
and control and abatement of nanomaterial releases using filtration technology. Measurement of nanoparticle agglomerates using
a newly developed instrument, the Universal NanoParticle Analyzer (UNPA), is discussed. Exposure measurement results for silicon
nanoparticles in a pilot scale production plant are presented, as well as exposure measurement and toxicity study of carbon
nanotubes (CNTs). Filtration studies of nanoparticle agglomerates are also presented as an example of emission control methods. 相似文献
59.
60.
Wahl Pierre Ly-Gagnon Dany-Sebastien Debaes Christof Miller David A. B. Thienpont Hugo 《Optical and Quantum Electronics》2012,44(3-5):285-290
Numerical calculations with finite-difference time-domain (FDTD) on metallic nanostructures in a broad optical spectrum require an accurate approximation of the permittivity of dispersive materials. In this paper, we present the algorithms behind B-CALM (Belgium-California Light Machine), an open-source 3D-FDTD solver operating on Graphical Processing Units with multi-pole dispersion models. Our modified architecture shows a reduction in computing times for multi-pole dispersion models. We benchmark B-CALM by computing the absorption efficiency of a metallic nanosphere on a broad spectral range with a six-poles Drude-Lorentz model and compare it with Mie theory.
相似文献