全文获取类型
收费全文 | 271篇 |
免费 | 2篇 |
专业分类
化学 | 54篇 |
力学 | 33篇 |
数学 | 39篇 |
物理学 | 147篇 |
出版年
2022年 | 2篇 |
2021年 | 2篇 |
2020年 | 6篇 |
2019年 | 6篇 |
2018年 | 7篇 |
2017年 | 6篇 |
2016年 | 15篇 |
2015年 | 2篇 |
2014年 | 4篇 |
2013年 | 6篇 |
2012年 | 9篇 |
2011年 | 9篇 |
2010年 | 12篇 |
2009年 | 11篇 |
2008年 | 7篇 |
2007年 | 13篇 |
2006年 | 6篇 |
2005年 | 5篇 |
2004年 | 5篇 |
2003年 | 12篇 |
2002年 | 6篇 |
2001年 | 4篇 |
2000年 | 12篇 |
1999年 | 4篇 |
1998年 | 2篇 |
1997年 | 3篇 |
1996年 | 2篇 |
1995年 | 4篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1991年 | 4篇 |
1990年 | 4篇 |
1989年 | 3篇 |
1988年 | 4篇 |
1986年 | 2篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1983年 | 4篇 |
1982年 | 4篇 |
1981年 | 7篇 |
1980年 | 6篇 |
1979年 | 4篇 |
1978年 | 6篇 |
1977年 | 4篇 |
1976年 | 5篇 |
1975年 | 6篇 |
1974年 | 2篇 |
1973年 | 2篇 |
1972年 | 3篇 |
1970年 | 5篇 |
排序方式: 共有273条查询结果,搜索用时 281 毫秒
91.
92.
93.
Journal of Thermal Analysis and Calorimetry - For every actual thermokinetic curve described by the equation $$\frac{{d\alpha }}{{dT}} = (1 - \alpha )^n \frac{A}{q}\exp \left( { - \frac{{ -... 相似文献
94.
L. A. Gorbachev 《Journal of Applied Mechanics and Technical Physics》1971,12(2):282-283
Some results are described of investigations to refine the shape of the temperature curve obtained when the thermal effect in cyclically loaded specimens is fixed. It is shown that the thermal effect occurs from the first loading cycles and not after application of a number of cycles, as previously assumed. A correlation is established between the temperature curve (its shape) and the shape of the curve for the change in the internal friction and the change in the bending of the specimen under cyclic loading. On this basis it can be stated that the shapes of the above curves indirectly describe the same changes in the metal when it is subjected to cyclic loads.Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, No. 2 pp. 122–123, March–April, 1971. 相似文献
95.
96.
We consider the Turan n-dimensional extremum problem of finding the value of An(hB
n
) which is equal to the maximum zero Fourier coefficient
of periodic functions f supported in the Euclidean ball hB
n
of radius h, having nonnegative Fourier coefficients, and satisfying the condition f(0)= 1. This problem originates from applications to number theory. The case of A1([–h,h]) was studied by S. B. Stechkin. For An(hB
n
we obtain an asymptotic series as h 0 whose leading term is found by solving an n-dimensional extremum problem for entire functions of exponential type. 相似文献
97.
E. V. Gorbachev A. E. Kirichenko D. V. Monakhov S. V. Romanov V. I. Volkov 《Physics of Particles and Nuclei Letters》2016,13(5):583-585
A betatron tune measurement system was developed and tested at the Nuclotron. A white noise and chirp signals were used for transverse beam motion excitation. A custom FlexRIO digitizer module was developed which provides excitation signal generation for kicker electrodes and real-time signal acquisition from pickup electrodes. A high resolution FFT algorithm was implemented inside a NI PXI FPGA module, connected to digitizer. The measurement system is integrated with the NICA control system based on the TANGO Controls. Results and tests performed with the Nuclotron beam are presented. 相似文献
98.
E. V. Gorbachev A. E. Kirichenko G. S. Sedykh V. I. Volkov 《Physics of Particles and Nuclei Letters》2016,13(5):598-600
Precise temperature control in various parts of the magnet and thermostat is one of the vital problems during cryogenic tests. The report describes design of the thermometry system, developed at LHEP JINR. This system is the operational prototype for the NICA thermometry system. Besides, the report describes generic software tools, developed for the TANGO-based control system web client software design. 相似文献
99.
Wide introduction of gas-turbine power stations working on associated oil gas is topical for Russia. Designing and operational
characteristics of PAES-2500 (2.5 MW) and EG-6000 (6.0 MW) gas-turbine power stations on associated oil gas manufactured by
Motor Sich Company are presented. 相似文献
100.
V. V. Gorbachev V. N. Gavrin T. V. Ibragimova A. V. Kalikhov Yu. M. Malyshkin A. A. Shikhin 《Physics of Particles and Nuclei》2017,48(1):1-4
A method of determining the activity of intensive distributed -sources on the measurement of the continuous spectrum of radiation, for example the internal bremsstrahlung, is developed. The recurrent formula for reconstructing of a continuous spectrum, registered in a Ge detector, at distorting it in the detector. The method of precise measurements of the spectrum of 51Cr internal bremsstrahlung using two point sources of low activity is described. 相似文献