全文获取类型
收费全文 | 71篇 |
免费 | 1篇 |
国内免费 | 1篇 |
专业分类
测绘学 | 1篇 |
大气科学 | 4篇 |
地球物理 | 8篇 |
地质学 | 25篇 |
海洋学 | 12篇 |
天文学 | 21篇 |
综合类 | 1篇 |
自然地理 | 1篇 |
出版年
2021年 | 2篇 |
2020年 | 1篇 |
2018年 | 1篇 |
2017年 | 3篇 |
2015年 | 2篇 |
2014年 | 2篇 |
2013年 | 4篇 |
2012年 | 1篇 |
2011年 | 2篇 |
2010年 | 2篇 |
2009年 | 5篇 |
2008年 | 4篇 |
2007年 | 3篇 |
2006年 | 7篇 |
2005年 | 5篇 |
2004年 | 4篇 |
2003年 | 3篇 |
2002年 | 4篇 |
2001年 | 3篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1984年 | 1篇 |
1980年 | 2篇 |
排序方式: 共有73条查询结果,搜索用时 164 毫秒
1.
Naoshi Sugiyama 《New Astronomy Reviews》2003,47(11-12):887
Recent WMAP results indicate quite early reionization of the universe. Here we discuss possible implications on CMB anisotropies and CMB polarization of the early reionization. 相似文献
2.
Jean-Marie Auzende Eiichi Honza Xavier Boespflug Satendra Deo Jean-Philippe Eissen Jun Hashimoto Philippe Huchon Junichiro Ishibashi Yo Iwabuchi Philip Jarvis Masato Joshima Kiyoyuki Kisimoto Yasuto Kuwahara Yves Lafoy Tsuyoshi Matsumoto Jean-Pierre Maze Kiyohiko Mitsuzawa Hiroyasu Monma Takeshi Naganuma Yukihiro Nojiri Suguru Ohta Kiyoshi Otsuka Yoshihisa Okuda Hélène Ondreas Akira Otsuki Etienne Ruellan Myriam Sibuet Manabu Tanahashi Takeo Tanaka Tetsuro Urabe 《Marine Geophysical Researches》1990,12(4):269-283
The aim of the Japanese-French Kaiyo 87 cruise was the study of the spreading axis in the North Fiji Basin (SW Pacific). A
Seabeam and geophysical survey allowed us to define the detailed structure of the active NS spreading axis between 16° and
22° S and its relationships with the left lateral motion of the North Fiji Fracture Zone. Between 21° S and 18°10′ S, the
spreading axis trends NS. From 18°10 S to 16°40 S the orientation of the spreading axis changes from NS to 015°. North of
16°40′ S the spreading axis trends 160°. These two 015° and 160° branches converge with the left lateral North Fiji fracture
zone around 16°40′ S to define an RRFZ triple junction. Water sampling, dredging and photo TV deep towing give new information
concerning the hydrothermal activity along the spreading axis. The discovery of hydrothermal deposits associated with living
communities confirms this activity. 相似文献
3.
A method for the determination of barium in sea water was investigated using inductively coupled plasma emission spectrometry, and sea water samples from the Japan Sea and the Pacific Ocean were directly analyzed by this method. Artificial sea water was used to prepare matrix matched standard solutions to overcome the problem of physical interference. The detection limit (signal/noise ratio=2) for barium in deionized and distilled water was 0.08µg l?1 and in sea water, 0.12µg l?1. The reproducibilities in the purified water and in the sea water at the 10µg l?1 level were 0.7% a#FFFFFFnd 0.5%, respectively. The barium concentration in both the Japan Sea and the Pacific Ocean increased with depth and ranged between 5.5–10.0µg l?1 and 4.1–18.4µg l?1, respectively. 相似文献
4.
O. Ozutsumi S. Sawada S. Iai Y. Takeshima W. Sugiyama T. Shimazu 《Soil Dynamics and Earthquake Engineering》2002,22(9-12):1075-1082
A series of effective stress analyses is carried out on the seismic performance of river dikes based on the case histories during the 1993 Hokkaido-Nansei-oki and 1995 Hyogoken-Nambu earthquakes in Japan. Seven case histories selected for the analyses involve a crest settlement ranging from none to 2.7 m in the dikes 3–6 m high with evidence of liquefaction at foundation soil. The effective stress model used is based on a multiple shear mechanism and was developed by one of the authors. The soil parameters are evaluated based on the site investigation and laboratory test results. The results of the analyses are basically consistent with the observed performance of the river dikes. In particular, the effective stress model shows a reasonable capability to reproduce the varying degree of settlements depending on the geotechnical conditions of foundation soils beneath the dikes. The analyses also indicate that the effect of a cohesive soil layer mixed with the liquefiable sand layers beneath the dikes can be a primary factor for reducing the liquefaction-induced deformation of dikes. 相似文献
5.
The purpose of this paper is to investigate the seismic response of a tall and narrow building, for example, a turbine building of thermal power plant, due to a traveling shear wave. It is considered that the dynamic response of the building can be affected by the spatial variance of seismic ground motion, because the building has a long-shaped foundation (43 meters wide by 343 meters long by 4 meters thick). First, analytical study was conducted using obliquely incident harmonic motion. And comparing the earthquake response observed at different points of foundation slab, it was found that the response at the end point where input wave reaches later is larger than that at the other end. From these studies, it was assured that the antisymmetric mode, which can be neglected in ordinary analysis, is excited by phase difference of input motion. 相似文献
6.
A phase of Ca3 (PO4)2, synthesized at 12GPa and 2300° C, is structurally analyzed by the single crystal X-ray diffraction method. This Ca3(PO4)2 is found to be a dense polymorph of tricalcium phosphate isostructural with Ba3 (PO4)2 and named γ-Ca3 (PO4)2. In the structure of Ca3 (PO4)2, a phosphorus atom is tetrahedrally coordinated by oxygen atoms and calcium atoms occupy two types of large metal sites. The Ca(1) site has twelve oxygen neighbours with the mean bond length of 2.739 Å while the other Ca(2) site is coordinated by ten oxygen atoms with the mean Ca-O distance of 2.588Å. The structure is characterized by the translationally interconnected polyhedral sequence PO4-Ca(2)O10-Ca (1)O12-Ca (2)O10-PO4 in the direction of the c axis. This dense phase of Ca3(PO4)2 with two large metal sites may be an important host for very large lithophile elements in the deep upper mantle of the earth. 相似文献
7.
8.
Hiroyasu Ando 《Astrophysics and Space Science》1986,118(1-2):177-181
It is proposed that the interacting solarg-modes are driven by the beat forcing ofg-modes by two 5-min oscillations, excited by ak-mechanism. The observational implications of the proposed mechanism are discussed.Paper presented at the IAU Third Asian-Pacific Regional Meeting, held in Kyoto, Japan, between 30 September–6 October, 1984. 相似文献
9.
10.
Hiroyuki Tashiro Joseph Silk Mathieu Langer Naoshi Sugiyama 《Monthly notices of the Royal Astronomical Society》2009,392(4):1421-1428
The Sunyaev–Zel'dovich (SZ) effect and the Faraday rotation from haloes are examined over a wide mass range, including gas condensation and magnetic field evolution. Contributions to the cosmic microwave background (CMB) angular power spectrum are evaluated for galaxy clusters, galaxy groups and galaxies. Smaller mass haloes are found to play a more important role than massive haloes for the B -mode polarization associated with the SZ CMB anisotropies. The B modes from the Faraday rotation dominate the secondary B modes caused by gravitational lensing at ℓ > 3000 . Measurement of B -mode polarization in combination with the SZ power spectrum can potentially provide important constraints on intracluster magnetic field and gas evolution at early epochs. 相似文献