全文获取类型
收费全文 | 266篇 |
免费 | 22篇 |
国内免费 | 20篇 |
专业分类
化学 | 6篇 |
晶体学 | 1篇 |
力学 | 65篇 |
综合类 | 13篇 |
数学 | 124篇 |
物理学 | 99篇 |
出版年
2023年 | 2篇 |
2022年 | 4篇 |
2021年 | 10篇 |
2020年 | 5篇 |
2019年 | 2篇 |
2018年 | 3篇 |
2017年 | 10篇 |
2016年 | 13篇 |
2015年 | 6篇 |
2014年 | 11篇 |
2013年 | 20篇 |
2012年 | 28篇 |
2011年 | 19篇 |
2010年 | 16篇 |
2009年 | 13篇 |
2008年 | 26篇 |
2007年 | 12篇 |
2006年 | 16篇 |
2005年 | 22篇 |
2004年 | 9篇 |
2003年 | 12篇 |
2002年 | 21篇 |
2001年 | 7篇 |
2000年 | 6篇 |
1999年 | 4篇 |
1998年 | 4篇 |
1997年 | 3篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1979年 | 1篇 |
排序方式: 共有308条查询结果,搜索用时 31 毫秒
201.
引入一种积分型的 Szász- Bézier算子 ,并研究其逼近性质 ,得到了此类算子对局部有界函数的逼近阶估计公式 相似文献
202.
In this study, the heat transfer of a non Newtonian thermodependent fluid flowing between two parallel plates is considered. The effects of different parameters on the evolutions of thermal boundary layer and of Nusselt number are numerically investigated in two heating cases and correlations are proposed to compute the heat transfer. To cite this article: N. Van Tuan, M. Lebouche, C. R. Mecanique 333 (2005). 相似文献
203.
The problem of a piston-like displacement of a fluid by another in a capillary is examined. It is suggested that each fluid is prolonged into the domain occupied by the other fluid. This enables the replacement of the two-phase flow problem by a transient single-phase flow problem, with discontinuity in velocity and pressure on a film interface. The problems related to the triple point are solved by introducing a limit fluid near the pore wall. The demonstration of the Washburn equation contributes to the physical justification of our model. To cite this article: Y. Lucas et al., C. R. Mecanique 334 (2006). 相似文献
204.
The stability of internally heated inclined plane parallel shear flows is examined numerically for the case of finite value of the Prandtl number, Pr. The transition in a vertical channel has already been studied for 0?Pr?100 with or without the application of an external pressure gradient, where the secondary flow takes the form of travelling waves (TWs) that are spanwise-independent (see works of Nagata and Generalis). In this work, in contrast to work already reported (J. Heat Trans. T. ASME 124 (2002) 635–642), we examine transition where the secondary flow takes the form of longitudinal rolls (LRs), which are independent of the steamwise direction, for Pr=7 and for a specific value of the angle of inclination of the fluid layer without the application of an external pressure gradient. We find possible bifurcation points of the secondary flow by performing a linear stability analysis that determines the neutral curve, where the basic flow, which can have two inflection points, loses stability. The linear stability of the secondary flow against three-dimensional perturbations is also examined numerically for the same value of the angle of inclination by employing Floquet theory. We identify possible bifurcation points for the tertiary flow and show that the bifurcation can be either monotone or oscillatory. To cite this article: M. Nagata, S. Generalis, C. R. Mecanique 332 (2004). 相似文献
205.
Michel Bouthier 《Comptes Rendus Mecanique》2003,331(2):165-172
An isochoric motion can be performed both in perfect fluid, in Newtonian fluid, in Maxwell fluid (slow motions) and in Rivlin–Ericksen fluid of second grade whatever be viscosities and viscometric coefficients, iff the motion is universal. Every universal motion with steady vorticity is a generalised Belrami flow, and fulfils the Stokes equation. If the velocity of an universal motion complies with , the motion stands for feasible motion in every second order fluid. Brothers of the potential flows, all the sets of universal motions make up bundles of linear or cono??d spaces with various dimensions, finite or infinite, issued from the rest . The structures appear by scanning parallel to the potential flows. To cite this article: M. Bouthier, C. R. Mecanique 331 (2003). 相似文献
206.
This paper describes numerical solutions of the Navier–Stokes equations for incompressible steady flow through a rigid smooth straight tube with an axially uniform non-circular cross section which mimics collapsed veins at peculiar values of the transmural pressure. One of the peculiar values of the transmural pressure produces a contact of the opposite walls along a straight segment. This article deals with the space variations of the wall shear stress induced along the wetted perimeter of the cross section as well as in the streamwise direction especially in the entry length. The motivation of this study is to provide the data for experimental works on flow-subjected endothelial cell culture when the space variations of the wall shear stress are non-uniform. To cite this article: S. Naili et al., C. R. Mecanique 330 (2002) 483–490. 相似文献
207.
Pasqua D'Ambra 《Continuum Mechanics and Thermodynamics》1997,9(2):97-114
In this work we present some results of the numerical simulation of the growth of a crystal from its melt, taking into account
faceting. The simulation is based on a numerical solution of a three–dimensional generalized Stefan problem. That problem
arises from a non–local thermomechanical theory applied to a continuous system with an interface and embodies ideas from the
dislocation theory of crystal growth. In the model, the crystal surface is an isotherm and the growth velocity of a crystal
face depends on the velocities of the other faces and on the whole crystal configuration as well as on the temperature gradient.
A front fixing formulation of the model is considered. This is a conservative form of the Isotherm Migration Method [6, 7,
8, 9, 10, 11] in spherical coordinates. The numerical solution is based on an explicit finite difference discretization of
the resulting non–linear equations. We develop a theoretical analysis of the interface equations that drive the crystal face
motion. Numerical results, showing evolution of complex crystals with configuration changing during the growth, are in accord
with experimental results. Furthermore, numerical experiments offer useful information on the influence of certain parameters
in the model on the growth process.
Received: March 21, 1996 相似文献
208.
Mohamed Hattabi Ikbal Snaike Jamal Echaabi Mohammed Ouadi Bensalah 《Comptes Rendus Mecanique》2005,333(7):585-591
This work proposes a procedure of finite difference discretized in a system of curvilinear coordinates adapted to the shape of the saturated zone, to simulate a flow in the LCM (Liquid Composites Molding) process. Formulation and the numerical application of the procedure are described. We describe two configurations of injections. A good agreement is found between numerical, analytical and literature experimental results. To cite this article: M. Hattabi et al., C. R. Mecanique 333 (2005). 相似文献
209.
Flow stability analysis and excitation using pulsating jets 总被引:1,自引:0,他引:1
Classical flow stability applied to transition from laminar to turbulent flow may also describe the behavior of vorticity fluctuations created by a pulsating jet placed along a solid boundary. A numerical laminar flow experiment involving a pulsating jet placed along the surface of a duct with flow separation downstream, resulted in eliminating most part of the separated flow region. Applying the same approach to a turbulent flow, it was possible to develop a turbulent stability flow formulation and apply successfully turbulent pulsating jet flow separation control. To cite this article: D. Skamnakis, K. Papailiou, C. R. Mecanique 333 (2005). 相似文献
210.
Aomar Ait Aider Salaheddine Skali-Lami Jean Pierre Brancher 《Comptes Rendus Mecanique》2005,333(2):197-203
Results of flow visualisation in a Taylor–Dean open device are given. Observations made at the inlet, the core and the outlet of the flow show that different flow patterns can develop simultaneously. The formation and the growth of the structures observed versus control parameters are described. To cite this article: A. Ait Aider et al., C. R. Mecanique 333 (2005). 相似文献