全文获取类型
收费全文 | 144篇 |
免费 | 3篇 |
国内免费 | 1篇 |
专业分类
化学 | 75篇 |
数学 | 35篇 |
物理学 | 38篇 |
出版年
2022年 | 4篇 |
2018年 | 2篇 |
2017年 | 3篇 |
2016年 | 9篇 |
2015年 | 4篇 |
2014年 | 1篇 |
2013年 | 7篇 |
2012年 | 4篇 |
2011年 | 6篇 |
2010年 | 3篇 |
2009年 | 3篇 |
2008年 | 3篇 |
2007年 | 6篇 |
2006年 | 5篇 |
2005年 | 4篇 |
2004年 | 6篇 |
2003年 | 1篇 |
2002年 | 4篇 |
2001年 | 1篇 |
2000年 | 4篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 6篇 |
1989年 | 8篇 |
1988年 | 4篇 |
1987年 | 5篇 |
1986年 | 3篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1979年 | 3篇 |
1978年 | 1篇 |
1977年 | 3篇 |
1975年 | 2篇 |
1973年 | 1篇 |
1971年 | 2篇 |
1966年 | 1篇 |
1948年 | 1篇 |
1947年 | 1篇 |
排序方式: 共有148条查询结果,搜索用时 15 毫秒
41.
S. K. Jain P. Kanwar S. Malik J. B. Srivastava 《Proceedings of the American Mathematical Society》2000,128(2):397-400
In this paper, it is shown that the group algebra is right CS if and only if . Moreover, when , then is also CS as a module over its center.
42.
Sehgal and Hung and Sakurai have recently argued that neutrino-hadron neutral-current couplings must lie in one of two allowed regions in coupling-parameter space. We study this conjecture using realistic BNL νμ and ν̄μ spectra in the elastic νμp (ν̄μp) calculations and also study constraints imposed by theq2-distributions. On comparing to gauge models, we find that the Weinberg-Salam and SU(2)L×SU(2)R×U(1) models fall within one allowed region, while a vectorlike SU(3)×U(1) model and a hybrid SU(2)×U(1) model with a (u, b)R doublet fall in the other region. 相似文献
43.
We use the quark model considerations of Federman, Rubinstein and Talmi and the relation (m
ψ/m
ϕ)≃(m
ϒ/m
ψ)≃(m
ϒ/m
ϒ) to compute the masses of beautiful and tasty vector mesons. 相似文献
44.
Russian Journal of Applied Chemistry - MORE (Microwave oriented reaction enhancement) green methodology was utilized to synthesize benzothiazol/thiazol-2-ylthiazolidin-4-ones and relatively assayed... 相似文献
45.
46.
We investigate the steady-state multiplicity exhibited by the reaction of a fuel/air mixture in a continuously stirred tank reactor. The chemical mechanism used is a modification of a scheme due to Sal'nikov. We consider four cases; corresponding to the choice of fuel fraction, inflow temperature, inflow pressure, or precursor decay rate as the primary bifurcation parameter. From the perspective of fire-retardancy, the case when the fuel fraction is varied is the most important. In this case the steady-state diagrams provide a basis for a systematic investigation into the effectiveness of gas-phase active fire retardants. 相似文献
47.
48.
49.
50.
Z. Huang H. S. Sidhu I. N. Towers Z. Jovanoski V. V. Gubernov 《Journal of mathematical chemistry》2017,55(5):1187-1201
We study the properties of travelling combustion waves in a diffusional thermal model with a two-step competitive exothermic-exothermic reaction mechanism. This investigation considers the system in one spatial dimension under adiabatic conditions. Based on the notion of the crossover temperature, the model is examined analytically using the activation energy asymptotic method to predict travelling combustion wave behaviour in the limit of large activation energies. The model is then studied numerically using a shooting-relaxation method over a wide range of parameter values, such as those describing the ratios of enthalpies, pre-exponential factors and activation energies. It is demonstrated that the flame speed as a function of these parameters is a single-valued monotonic function and there are two flame regimes identified—each region representing parameter values when one reaction dominates the other. 相似文献