全文获取类型
收费全文 | 371篇 |
免费 | 13篇 |
国内免费 | 1篇 |
专业分类
化学 | 251篇 |
晶体学 | 5篇 |
力学 | 23篇 |
数学 | 38篇 |
物理学 | 68篇 |
出版年
2024年 | 3篇 |
2023年 | 4篇 |
2022年 | 20篇 |
2021年 | 24篇 |
2020年 | 20篇 |
2019年 | 17篇 |
2018年 | 16篇 |
2017年 | 20篇 |
2016年 | 19篇 |
2015年 | 12篇 |
2014年 | 13篇 |
2013年 | 32篇 |
2012年 | 32篇 |
2011年 | 20篇 |
2010年 | 15篇 |
2009年 | 10篇 |
2008年 | 19篇 |
2007年 | 14篇 |
2006年 | 8篇 |
2005年 | 9篇 |
2004年 | 12篇 |
2003年 | 2篇 |
2002年 | 4篇 |
2001年 | 2篇 |
2000年 | 4篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 4篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 3篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1978年 | 3篇 |
1977年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1963年 | 2篇 |
排序方式: 共有385条查询结果,搜索用时 15 毫秒
111.
Adnan S. Abu‐Surrah Martti Klinga Timo Repo Markku Leskel Tony Debaerdemaeker Bernhard Rieger 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(2):e44-e45
The title compound was formed upon slow evaporation of a solution of the solvated dicationic complex bis(acetonitrile)bis[1,2‐bis(diphenyl‐phosphino)ethane]palladium(II) bis(tetrafluoroborate) in deuterated chloroform. The dinucleur palladium complex forms triclinic crystals and there is an inversion center between the Pd atoms. Compared to the corresponding monomeric compound, the Cl—Pd—Cl angles decrease upon briding from 94.19 (7) to 86.96 (4)°. 相似文献
112.
Mostafa Gamal A. E. Mahajumi Abu Syed AlRabiah Haitham Kadi Adnan A. Lu Yang Rahman A. F. M. Motiur 《Journal of fluorescence》2021,31(5):1489-1502
Journal of Fluorescence - Fluorescein (1), a known fluorescent tracer in microscopy with high photophysical properties, was esterified to have fluorescein ethyl ester (2) and O-ethyl-fluorescein... 相似文献
113.
Mehmood Ahmer Khan Sajid Iqbal Muhammad Saleem Butt Adnan Saeed 《Journal of Thermal Analysis and Calorimetry》2022,147(12):6983-6992
Journal of Thermal Analysis and Calorimetry - The problem of entropy generation in mixed convection flow of incompressible viscous fluid along an isothermal vertical wavy cone is investigated... 相似文献
114.
Malik Adnan Nafees Ayesha Ali Akram Butt Muhammad Naeem 《The European Physical Journal C - Particles and Fields》2022,82(2):1-12
The European Physical Journal C - Much theoretical effort and automatization are required to confront new physics models with experimental data for many types of particle reactions at future... 相似文献
115.
Imam Saifullahi Shehu Adnan Rohana Kaus Noor Haida Mohd 《Research on Chemical Intermediates》2018,44(9):5357-5376
Research on Chemical Intermediates - In this work, a series of Y-doped BiOBr photocatalysts with different yttrium contents were successfully synthesized through a facile ethylene glycol-assisted... 相似文献
116.
117.
Raza M. A. Amin M. Muhammad G. Rashid A. Adnan A. 《Russian Journal of General Chemistry》2017,87(11):2678-2683
Russian Journal of General Chemistry - Herein we present the study of synthesis of novel bio-organometallic conjugates using 1,3-dipolar cycloaddition click reactions. Amino acid azides such as... 相似文献
118.
119.
Adnan H. Nayfeh 《International Journal of Solids and Structures》1975,11(9):937-946
Continuum theories of composites are employed to analyze the influence of inclusions and porosity on the elastic response of both homogeneous and laminated composite media. The general model analyzed consists of a periodic array of two perfectly bonded laminates; one of which consists of an elastic homogeneous material while the other is made up of a periodic array of cylindrical elastic inclusions that are distributed in another elastic matrix material. Several specific models are deduced as special cases. In all cases, porosity is simulated in the limit as the properties of the inclusions identically vanish. It is demonstrated that porosity plays a major role in the geometric dispersion of such media; in particular, it increases the arrival and rise times (spreading) of a propagating transient pulse. For the special case of elastic inclusions in a homogeneous matrix media, the present results correlate very well with existing experimental data and other approximate analyses. 相似文献
120.
Adnan Ali Jeongdai Jo Young Jin Yang Kyung Hyun Choi 《Applied Physics A: Materials Science & Processing》2014,114(2):323-330
Graphene-based composites represent a new class of materials with potential for many applications. Graphene can be attached to a metal, a semiconductor, or any polymer for enhancing properties. In this work, a new mixed dispersion approach for graphene-based composite has taken on. Graphene flakes (<4 layers) and a well-known semiconductor zinc oxide (ZnO) (<50 nm particle size) have dispersed in N-methyl-pyrrolidone. We deposited graphene/ZnO composite thin film by a simple, low-cost, environmentally friendly and non-vacuum electrohydrodynamic atomization process on silicone substrate. Experiments have been carried out by changing flow rate and applied potential while keeping stand-off distance and substrate velocity constant, to discover the optimum conditions for obtaining a high-quality thin film. It has been explored that high-quality thin composite film is obtained at optimum flow rate of 300 μl/h at 6.3 kV applied potential after curing for 2 h at 300 °C. Graphene/ZnO thin composite film has been characterized using Field emission scanning electron microscopy, Ultra-violet Visible near Infra Red spectroscopy, X-ray diffraction, Raman Spectroscopy and 3D-Nanomap. For electrical behavior analysis, a simple diode Indium tin oxide/(poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS)/polydioctylfluorene-benzothiadiazole(F8BT)/(Graphene/ZnO) has fabricated. It is observed that at voltage of 0.3 V, the current in organic structure is at low value of 1.20 × 10?3 Amp/cm2 and after that as further voltage was applied, the device current increased by the order of 110 and reaches up to 1.32 × 10?1 Amp/cm2 at voltage 2 V. 相似文献