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21.
E. A. Henry M. J. Brinkman C. W. Beausang J. A. Becker N. Roy A. Kuhnert S. W. Yates J. A. Cizewski R. M. Diamond M. A. Deleplanque F. S. Stephens J. E. Draper W. H. Kelly R. J. McDonald J. Burde W. Korten E. Rubel Y. A. Akovali 《Zeitschrift für Physik A Hadrons and Nuclei》1990,336(3):361-362
By analyzing the thick target yield curve of resonant (p,γ) reactions on23Na and26Mg for various target temperatures within a Monte Carlo approach, we are able to define the Debye and Einstein temperature of the target material in the surface region. The obtained surface temperatures are noticeably higher than the respective calorimetric values. 相似文献
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L. A. Rubel 《Acta Mathematica Hungarica》1964,15(1-2):175-176
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Superconducting Double Perovskite Bismuth Oxide Prepared by a Low‐Temperature Hydrothermal Reaction 下载免费PDF全文
Mirza H. K. Rubel Prof. Akira Miura Prof. Takahiro Takei Prof. Nobuhiro Kumada M. Mozahar Ali Prof. Masanori Nagao Prof. Satoshi Watauchi Prof. Isao Tanaka Prof. Kengo Oka Prof. Masaki Azuma Prof. Eisuke Magome Prof. Chikako Moriyoshi Prof. Yoshihiro Kuroiwa Prof. A. K. M. Azharul Islam 《Angewandte Chemie (International ed. in English)》2014,53(14):3599-3603
Perovskite‐type structures (ABO3) have received significant attention because of their crystallographic aspects and physical properties, but there has been no clear evidence of a superconductor with a double‐perovskite‐type structure, whose different elements occupy A and/or B sites in ordered ways. In this report, hydrothermal synthesis at 220 °C produced a new superconductor with an A‐site‐ordered double perovskite structure, (Na0.25K0.45)(Ba1.00)3(Bi1.00)4O12, with a maximum Tc of about 27 K. 相似文献
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Camille Z. Rubel Yilin Cao Tamara El-Hayek Ewing Gabriele Laudadio Gregory L. Beutner Steven R. Wisniewski Xiangyu Wu Phil S. Baran Julien C. Vantourout Keary M. Engle 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2024,136(2):e202311557
Over the last fifty years, the use of nickel catalysts for facilitating organic transformations has skyrocketed. Nickel(0) sources act as useful precatalysts because they can enter a catalytic cycle through ligand exchange, without needing to undergo additional elementary steps. However, most Ni(0) precatalysts are synthesized with stoichiometric aluminum–hydride reductants, pyrophoric reagents that are not atom-economical and must be used at cryogenic temperatures. Here, we demonstrate that Ni(II) salts can be reduced on preparative scale using electrolysis to yield a variety of Ni(0) and Ni(II) complexes that are widely used as precatalysts in organic synthesis, including bis(1,5-cyclooctadiene)nickel(0) [Ni(COD)2]. This method overcomes the reproducibility issues of previously reported methods by standardizing the procedure, such that it can be performed anywhere in a robust manner. It can be transitioned to large scale through an electrochemical recirculating flow process and extended to an in situ reduction protocol to generate catalytic amounts of Ni(0) for organic transformations. We anticipate that this work will accelerate adoption of preparative electrochemistry for the synthesis of low-valent organometallic complexes in academia and industry. 相似文献
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A difference polynomial is one of the form P(x, y) = p(x) ? q(y). Another proof is given of the fact that every difference polynomial has a connected zero set, and this theorem is applied to give an irreducibility criterion for difference polynomials. Some earlier problems about hereditarily irreducible polynomials (HIPs) are solved. For example, P(x, y) is called a HIP (two-variable case) if P(a(x), b(y)) is always irreducible, and it is shown that such two-variable HIPs actually exist. 相似文献
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M. J. Brinkman A. Kuhnert E. A. Henry J. A. Becker S. W. Yates R. M. Diamond M. A. Deleplanque F. S. Stephens W. Korten F. Azaiez W. H. Kelly J. E. Draper C. W. Beausang E. Rubel J. A. Cizewski 《Zeitschrift für Physik A Hadrons and Nuclei》1990,335(1):115-116
For the first time, collective bands have been observed in the doubly-odd nucleus124Cs. They are proposed to result in the coupling of an h11/2 proton to h11/2 and positive parity neutrons. The relative residual protonneutron interaction in124Cs is calculated and compared to that of neighbouring odd-odd nuclei. 相似文献
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