理学 >>> 数学 信息科学与系统科学 物理学 化学 天文学 地球科学总论 大气科学 地球物理学 地理学 地质学 水文学 海洋科学 生物学 科学技术史
搜索结果: 46-60 共查到理学 record相关记录230条 . 查询时间(0.015 秒)
Time series for the Southern Oscillation Index and mean global near surface temperature anomalies are compared for the 1950 to 2012 period using recently released HadCRU4 data. The method avoids a foc...
Fossil record holds a key to conservation     fossil  ecological       font style='font-size:12px;'> 2014/7/16
UQ paleontologists have contributed to a new book that shows how to incorporate fossil data into ecological and conservation studies.
Australia is classified as a Stable Continental Region (SCR) in terms of its plate tectonic setting and seismicity (Johnston et al. 1994). While such settings produce only approximately 0.2% of the wo...
Testing homogeneity with the fossil record of galaxies     Early Universe   Gravity       font style='font-size:12px;'> 2011/10/20
The standard Friedmann model of cosmology is based on the Copernican Principle, i.e. the assumption of a homogeneous background on which structure forms via perturbations. Homogeneity underpins both g...
Record process on the Continuum Random Tree     continuum random tree, records, cutting down a tree       font style='font-size:12px;'> 2011/9/14
Abstract: We consider the number of cuts $X_n^*$ needed to isolate the root of the sub-tree spanned by $n$ leaves uniformly chosen at random in Aldous's continuum random tree $\ct$. We prove the almos...
A long-term study, conducted from February 2005 to July 2008, involving chemical composition and optical properties of ambient aerosols from a high-altitude site (Manora Peak: 29.4° N, 79.5° E, ~1950 ...
Aerosol mass and the absorbing fraction are important variables, needed to constrain the role of atmospheric particles in the Earth radiation budget, both directly and indirectly through CCN activatio...
Multi-year time series records of C2-C6 alkanes, C2-C4 alkenes, ethyne, isoprene, C6-C8 aromatics, trichloroethene (C2HCl3), and tetrachloroethene (C2Cl4) from canister samples collected during Januar...
Synchronous interannual variability in water transparency observed in neighboring lakes has been linked to regional precipitation and resultant runoff of dissolved organic material, but many climate f...
Ecologists receive mixed news from fossil record     ecologists  mixed news  fossil record       font style='font-size:12px;'> 2010/4/29
Paleontologists can’t always get what they want, to paraphrase the Rolling Stones, but sometimes they can get what they need, according to a study that will appear in the May issue of the American Nat...
Reseda globulosa (Resedaceae): a new record for the flora of Turkey     Reseda  Resedaceae  new record  flora  Turkey       font style='font-size:12px;'> 2010/3/17
Reseda globulosa Fisch. & C.A.Mey. (Resedaceae) is reported as a new record for Turkish flora. It was identified using the collected specimens and Flora Palaestina. The description, illustration, and ...
Lophanthus (Lamiaceae) in Turkey: a new generic record and a new species     Endemic  Lamiaceae  Lophanthus  Van  Turkey       font style='font-size:12px;'> 2010/3/17
The genus Lophanthus Adans. is recorded for the first time from Turkey. Specimens collected from Van province, east Anatolia, are described here as the new species Lophanthus turcicus Dirmenci, Yı...
New optical clock breaks accuracy record(图)     New optical clock  accuracy record       font style='font-size:12px;'> 2010/2/23
A new optical clock that is twice as accurate as any other has been unveiled by physicists in the US. The clock, which is based on a single aluminium ion, could remain accurate to within one second ov...
Record-breaking collisions(图)     Record-breaking  particle accelerator  the theorized Higgs boson       font style='font-size:12px;'> 2010/2/24
In December, the Large Hadron Collider, the world’s largest particle accelerator, shattered the world record for highest energy particle collisions. This week, team led by researchers from MIT, CERN a...
Graphene transistor breaks new record(图)     Graphene transistor  new record       font style='font-size:12px;'> 2010/2/23
Physicists in the US have made the fastest graphene transistor ever, with a cut-off frequency of 100 GHz. The device can be further miniaturized and optimized so that it could soon outperform conventi...

中国研究生教育排行榜-

正在加载...

中国学术期刊排行榜-

正在加载...

世界大学科研机构排行榜-

正在加载...

中国大学排行榜-

正在加载...

人 物-

正在加载...

课 件-

正在加载...

视听资料-

正在加载...

研招资料 -

正在加载...

知识要闻-

正在加载...

国际动态-

正在加载...

会议中心-

正在加载...

学术指南-

正在加载...

学术站点-

正在加载...