全文获取类型
收费全文 | 254篇 |
免费 | 12篇 |
国内免费 | 2篇 |
专业分类
化学 | 145篇 |
晶体学 | 2篇 |
力学 | 16篇 |
数学 | 43篇 |
物理学 | 62篇 |
出版年
2023年 | 4篇 |
2022年 | 6篇 |
2021年 | 8篇 |
2020年 | 5篇 |
2019年 | 4篇 |
2018年 | 7篇 |
2016年 | 7篇 |
2015年 | 10篇 |
2014年 | 6篇 |
2013年 | 29篇 |
2012年 | 13篇 |
2011年 | 14篇 |
2010年 | 3篇 |
2009年 | 8篇 |
2008年 | 5篇 |
2007年 | 2篇 |
2006年 | 11篇 |
2005年 | 6篇 |
2004年 | 10篇 |
2003年 | 6篇 |
2002年 | 4篇 |
2000年 | 5篇 |
1999年 | 7篇 |
1998年 | 5篇 |
1997年 | 2篇 |
1996年 | 5篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1991年 | 2篇 |
1986年 | 3篇 |
1984年 | 2篇 |
1981年 | 4篇 |
1980年 | 5篇 |
1979年 | 2篇 |
1978年 | 5篇 |
1965年 | 2篇 |
1940年 | 2篇 |
1932年 | 3篇 |
1927年 | 2篇 |
1926年 | 3篇 |
1922年 | 2篇 |
1920年 | 3篇 |
1918年 | 2篇 |
1912年 | 4篇 |
1911年 | 2篇 |
1910年 | 2篇 |
1907年 | 1篇 |
1904年 | 1篇 |
1899年 | 2篇 |
排序方式: 共有268条查询结果,搜索用时 15 毫秒
81.
82.
Benedict?M.?N.?CarterEmail author Alex?B.?Nielsen 《General Relativity and Gravitation》2005,37(9):1629-1634
The static potential for a massless scalar field shares the essential features of the scalar gravitational mode in a tensorial
perturbation analysis about the background solution. Using the fluxbrane construction of [8] we calculate the lowest order
of the static potential of a massless scalar field on a thin brane using series solutions to the scalar field's Klein Gordon
equation and we find that it has the same form as Newton's Law of Gravity. We claim our method will in general provide a quick
and useful check that one may use to see if their model will recover Newton's Law to lowest order on the brane. 相似文献
83.
84.
Benedict Y. K. Ho Leonard Spialter Lee D. Smithson 《Journal of mass spectrometry : JMS》1975,10(8):617-624
High resolution mass spectra have been obtained for a series of methyl, ethyl and phenyl substituted siloxazolidones (cyclic compounds derived from the condensation of organosilane derivatives with amino acids). The effects on the mass spectra of these compounds upon substitution at the saturated ring carbon and at the silicon atom, the migratory nature of the phenyl group on nitrogen, and theextent of biphenyl radical ion formation in the skeletal rearrangement processes have been examined. 相似文献
85.
For positive integers n1, n2, …, nI and graphs GI+1, GI+2, …, Gk, 1 ≤ / < k, the mixed Ramsey number χ(n1, …, n1, GI+1, …, Gk) is define as the least positive integer p such that for each factorization Kp = F1⊕ … ⊕ F⊕ FI+1⊕ … ⊕ Fk, it it follows that χ(Fi) ≥ ni for some i, 1 ? i ? l, or Gi is a subgraph of Fi for some i, l < i ? k. Formulas are presented for maxed Ramsey numbers in which the graphs GI+1, GI+2, …, Gk are connected, and in which k = I+1 and GI+1 is arbitray. 相似文献
86.
Benedict H Gross 《Journal of Number Theory》1979,11(3):344-348
87.
Miguel A. MoralesLorin X. Benedict Daniel S. ClarkEric Schwegler Isaac TamblynStanimir A. Bonev Alfredo A. CorreaSteven W. Haan 《High Energy Density Physics》2012,8(1):5-12
We describe ab initio electronic structure calculations (density functional theory molecular dynamics and coupled electron-ion quantum Monte Carlo) of the equation of state (EOS) of hydrogen in a pressure-temperature regime relevant for simulating the initial phase of an inertial confinement fusion capsule implosion. We find the computed EOS to be quite close to that of the most recent SESAME table (constructed by G. Kerley, 2003). A simple density-dependent but temperature-independent correction brings the 2003-Kerley EOS into excellent agreement with ours in the chosen region of the hydrogen phase diagram. Simulations of fusion ignition experiments on the National Ignition Facility (NIF) with this modified 2003-Kerley table are shown to produce results nearly indistinguishable from those of the 2003-Kerley EOS, which was used to design the capsule. In this sense, we do not expect that further improvements to the hydrogen EOS in this particular regime will impact the capsule design. 相似文献
88.
89.
90.