全文获取类型
收费全文 | 1480篇 |
免费 | 12篇 |
国内免费 | 3篇 |
专业分类
化学 | 979篇 |
晶体学 | 10篇 |
力学 | 31篇 |
数学 | 297篇 |
物理学 | 178篇 |
出版年
2014年 | 13篇 |
2013年 | 26篇 |
2012年 | 35篇 |
2011年 | 37篇 |
2010年 | 30篇 |
2009年 | 23篇 |
2008年 | 39篇 |
2007年 | 34篇 |
2006年 | 34篇 |
2005年 | 41篇 |
2004年 | 28篇 |
2003年 | 31篇 |
2002年 | 31篇 |
2001年 | 19篇 |
2000年 | 19篇 |
1999年 | 20篇 |
1998年 | 16篇 |
1996年 | 17篇 |
1994年 | 13篇 |
1993年 | 18篇 |
1992年 | 14篇 |
1991年 | 19篇 |
1990年 | 21篇 |
1989年 | 22篇 |
1988年 | 18篇 |
1987年 | 15篇 |
1986年 | 26篇 |
1985年 | 19篇 |
1984年 | 28篇 |
1983年 | 22篇 |
1982年 | 34篇 |
1981年 | 37篇 |
1980年 | 22篇 |
1979年 | 29篇 |
1978年 | 16篇 |
1977年 | 18篇 |
1976年 | 21篇 |
1975年 | 22篇 |
1971年 | 14篇 |
1969年 | 13篇 |
1938年 | 15篇 |
1937年 | 17篇 |
1934年 | 21篇 |
1933年 | 19篇 |
1931年 | 24篇 |
1930年 | 19篇 |
1929年 | 20篇 |
1928年 | 29篇 |
1927年 | 18篇 |
1926年 | 19篇 |
排序方式: 共有1495条查询结果,搜索用时 31 毫秒
991.
992.
993.
Erich Gundermann 《Colloid and polymer science》1942,99(2):233-240
Ohne Zusammenfassung 相似文献
994.
Erich K?nigsberger 《Monatshefte für Chemie / Chemical Monthly》2001,14(3):1363-1386
A method is proposed that permits the proper extrapolation of thermodynamic quantities represented by the Pitzer equations from 25°C to other temperatures. The new method, which assumes temperature independent heat capacities, was tested for the NaCl*H2O system and found very satisfactory. A new evaluation of the Na2CO3*H2O system according to the CALPHAD method is presented, and solubilities for the quaternary Na2CO3*NaCl*NaOH*H2O and its ternary subsystems are predicted. Limitations of (i) these predictions and of (ii) the Pitzer model regarding extrapolations to high molalities are discussed. 相似文献
995.
Erich Königsberger 《Monatshefte für Chemie / Chemical Monthly》2001,132(11):1363-1386
Summary. A method is proposed that permits the proper extrapolation of thermodynamic quantities represented by the Pitzer equations from 25°C to other temperatures. The new method, which assumes temperature independent heat capacities, was tested
for the NaCl*H2O system and found very satisfactory. A new evaluation of the Na2CO3*H2O system according to the CALPHAD method is presented, and solubilities for the quaternary Na2CO3*NaCl*NaOH*H2O and its ternary subsystems are predicted. Limitations of (i) these predictions and of (ii) the Pitzer model regarding extrapolations to high molalities are discussed.
Received April 20, 2001. Accepted May 2, 2001 相似文献
996.
Ohne Zusammenfassung 相似文献
997.
Metals with strong correlations are a major challenge for realistic electronic structure calculations. The complexity of the systems under consideration precludes a direct fully microscopic treatment by means of the theoretical and computational methods available at present. The present paper analyzes the applicability and restrictions of common approximation schemes by comparing their predictions for a model pertinent to heavy fermion metals to the exact solution. The criteria chosen for the assessment are the density distribution in the ground state as well as the energy scale for low-lying excitations. 相似文献
998.
In this note a partial solution of Open Problem 41C of Aumann and Shapley [1974, pp. 250–251] is presented. A sufficient condition for the Aumann-Shapley value of a market game to exist, to be contained in its core, and to be the competitive payoff distribution of a transferable utility competitive equilibrium is given. In this context, balancedness and σ-balancedness criteria for large classes of cooperative games are proven. 相似文献
999.
1000.
Erich Miersemann 《Calculus of Variations and Partial Differential Equations》2002,15(2):237-256
Wetting barriers are edges or lines of a solid surface where different materials meet each other. Typical questions are how
much of a fluid rests in a capillary tube or how much can piled up on a glass. We will derive a necessary condition which
must be satisfied if a capillary surface hangs on a wetting barrier and if it defines a weak local minimum of the associated
energy functional. In general, this functional is not smooth and the set of admissible variations is not a linear space. Then,
we derive an eigenvalue criterion which provides a sufficient condition for a given capillary surface to be a weak local minimizer
of the associated energy functional.
Received: 18 December 2000 / Accepted: 7 June 2001 / Published online: 19 October 2001 相似文献