Author Keywords: Track formation; Heavy ion; Bubble detector; Track detector; Threshold detector; Identification of heavy ions 相似文献
全文获取类型
收费全文 | 3885篇 |
免费 | 89篇 |
国内免费 | 17篇 |
专业分类
化学 | 2974篇 |
晶体学 | 41篇 |
力学 | 41篇 |
数学 | 192篇 |
物理学 | 743篇 |
出版年
2022年 | 35篇 |
2021年 | 25篇 |
2020年 | 51篇 |
2019年 | 53篇 |
2018年 | 43篇 |
2017年 | 31篇 |
2016年 | 62篇 |
2015年 | 44篇 |
2014年 | 68篇 |
2013年 | 189篇 |
2012年 | 172篇 |
2011年 | 211篇 |
2010年 | 114篇 |
2009年 | 123篇 |
2008年 | 211篇 |
2007年 | 214篇 |
2006年 | 219篇 |
2005年 | 193篇 |
2004年 | 171篇 |
2003年 | 143篇 |
2002年 | 122篇 |
2001年 | 82篇 |
2000年 | 61篇 |
1999年 | 59篇 |
1998年 | 40篇 |
1997年 | 43篇 |
1996年 | 58篇 |
1995年 | 45篇 |
1994年 | 35篇 |
1993年 | 45篇 |
1992年 | 56篇 |
1991年 | 41篇 |
1990年 | 40篇 |
1989年 | 46篇 |
1988年 | 46篇 |
1987年 | 39篇 |
1986年 | 41篇 |
1985年 | 78篇 |
1984年 | 57篇 |
1983年 | 37篇 |
1982年 | 48篇 |
1981年 | 41篇 |
1980年 | 49篇 |
1979年 | 54篇 |
1978年 | 50篇 |
1977年 | 38篇 |
1976年 | 33篇 |
1975年 | 38篇 |
1974年 | 40篇 |
1973年 | 42篇 |
排序方式: 共有3991条查询结果,搜索用时 15 毫秒
71.
Tetsuo Ueda 《Phase Transitions》2013,86(2-3):93-104
By using a giant amoeboid cell of the Physarum plasmodium, changes in the intracellular distribution of chemical components are studied in relation to information processing in cell behavior. Various kinds of metabolites oscillate, and so the protoplasm should be a collection of chemical oscillators. Spatially, characteristic chemical patterns are self-organized for different cell shapes, and hence cell behavior. New phase waves propagate throughout the cell upon local stimulation, their direction being opposite for attraction and repulsion. Locomotion is inhibited when the coherence of the oscillators breaks. Thus, pattern dynamics is correlated with information processing in the amoeboid cell. 相似文献
72.
Okamura H Kawahara J Nanba T Kimura S Soda K Mizutani U Nishino Y Kato M Shimoyama I Miura H Fukui K Nakagawa K Nakagawa H Kinoshita T 《Physical review letters》2000,84(16):3674-3677
Optical conductivity data of the intermetallic compounds (Fe1-xVx)3Al ( 0=x=0.33) reveal that their density of states around the Fermi energy ( E(F)) is strongly reduced as x is increased. In particular, Fe2VAl ( x = 0.33) has a deep, well-developed pseudogap of 0.1-0.2 eV at E(F) and a small density ( approximately 5x10(20) cm(-3)) of carriers, which is highly unusual for intermetallic compounds. It is shown that the pseudogap results from the band structure of Fe2VAl, rather than from temperature-dependent correlation effects. Based on the present results, we propose a simple model that consistently explains both the semiconductorlike transport and the metallic photoemission results previously observed for Fe2VAl. 相似文献
73.
S. -L. Guo L. Li T. Doke J. Kikuchi A. Kyan E. Yoshihira T. Kato T. Murakami 《Radiation measurements》2001,34(1-6):269-272
Characteristics of tracks created by heavy ions in bubble detectors have been studied in detail by using four types of super long (23 cm), self-made bubble detectors and six species of high energy heavy ions: 12C, 28Si, 40Ar, 56Fe, 84Kr and 132Xe. The following characteristics of heavy ion tracks in bubble detectors have been recognized:
74.
Y. Kurihara J. Fujimoto T. Ishikawa Y. Shimizu K. Kato K. Tobimatsu T. Munehisa 《The European Physical Journal C - Particles and Fields》2001,20(2):253-258
A parton shower method for the photonic radiative correction is applied to single W-boson production processes. The energy scale for the evolution of the parton shower is determined so that the correct soft-photon
emission is reproduced. Photon spectra radiated from the partons are compared with those from the exact matrix elements, and
show a good agreement. Possible errors due to an inappropriate energy-scale selection or due to the ambiguity of the energy-scale
determination are also discussed, particularly for the measurements on triple gauge couplings.
Received: 22 February 2001 / Published online: 11 May 2001 相似文献
75.
76.
77.
Nobuhiro Kodama Kiyoaki Tanaka Taizo Utsunomiya Yoshio Hoshino Fumiyuki Marumo Nobuo Ishizawa Masanori Kato 《Solid State Ionics》1984,14(1):17-24
Integrated intensities of X-ray reflections from a barium chloride fluoride single crystal were measured at 24, 180, 289, 402, 467 and 610°C. The intensities were used for the determination of the anharmonic potential parameters up to the third order. Harmonic potential parameters for each ion were obtained from the temperature dependence of thermal parameters, and anharmonic potential parameters were determined by the least-squares procedures, utilizing the temperature factor formalism based on the cumulant expansion. As a result, it has been found that the Ba2+ and Cl? ions show an anharmonicity, while no significant anharmonic effect was detected for the F? ion. From the potential calculated around the Cl? and F? ions, it was found that both Cl? and F? ions diffuse more easily within the (001) plane than along the c axis. 相似文献
78.
79.
The glass-forming ability (GFA) of an alloy in this case is the largest diameter of a rod which can be cast fully glassy. The present work shows that the thermal conductivity of a liquid alloy has a strong effect on GFA by influencing the cooling rate upon mould casting. The initial cooling rates (for the first 70–100?K of temperature decrease), obtained for Cu-, Zr- and Au-based bulk glass-forming alloys in the liquid state, are found to scale linearly with the thermal conductivities of the liquid base elements. However the low cooling rate found for Ni-based alloy suggests that the heat transfer at the melt–mould interface may also influence the cooling rate. The low thermal conductivity of Ni-based alloys and the correspondingly low cooling rate obtained compared to Cu-based counterparts explains their lower GFA. In the literature, many factors influencing the GFA of alloys have been discussed. To these factors, the present study adds the thermal conductivity of the molten alloy and the melt–mould heat-transfer coefficient. Moreover, the cooling rate depends on temperature and, thus, the critical cooling rate itself is not a suitable parameter for indicating GFA. The cooling can be better described by an appropriate fitting of the cooling curve to an exponential temperature decay function. 相似文献
80.
Continuous cooling transformation (CCT) diagrams were successfully constructed for Zr65Al7.5Ni10Cu17.5? x Pd x (x?=?0???17.5) glass-forming alloys, comparing phase-transformation features in the alloy system to composition. While a low-Pd alloy (x?=?5) showed a single transformation curve, corresponding to the formation of a crystalline phase on the high-temperature side of the undercooled-liquid region, for a given time-scale, a high-Pd alloy (x?=?17.5) revealed an additional curve, corresponding to quasicrystalline phase formation on the lower temperature side. The result provides a clue to the structural and property control on the alloy system. Glassy specimens of the same size but with different intrinsic structure, evaluated by structural relaxation during continuous heating, could be fabricated for the low-Pd alloy (x?=?5). Plasticity was found to increase proportionally with the relaxation enthalpy. On the other hand, the critical size for glass formation could be improved considerably from 5 to 7 mm in diameter for the high-Pd alloy (x?=?17.5). 相似文献