搜索结果: 1-15 共查到“知识库 理学 1992”相关记录27条 . 查询时间(0.125 秒)
新疆哈密大南湖地区为我国典型的干旱—半干旱地区中的荒漠区,研究该地区天然植被近年来在全球气候变化背景下的发育状况具有重要意义。为此,使用Landsat遥感数据、数字高程模型及当地气象数据,采用像元二分模型提取植被覆盖度; 通过相关分析,研究该地区1992—2014年间天然植被的时空变化特点。结果表明,23 a来该区植被覆盖度有增加的趋势; 植被覆盖度整体上与地形高度呈弱正相关,局部植被密集处往往是...
季风常绿阔叶林是中国南亚热带地区的地带性植被, 其群落结构及其动态变化直接影响着该森林能为该地区提供的生态系统服务功能质量。该文利用1992-2015年共24年的长期定点监测数据, 从群落种类组成、生物量、径级、密度等数量特征方面研究了鼎湖山季风常绿阔叶林群落结构的动态变化。结果表明: 1)到2015年该森林群落林分个体密度增加了42.7%, 总生物量减少了5.1%; 24年间基于生物量的β多样性...
Source process of the October 12, 1992 Cairo earthquake
Inversion source process Cairo earthquakes
2015/10/8
Broadband body waves recorded at 12 digital seismic stations worldwide were used to study the source process of the October 12, 1992 Cairo earthquake. To study the source process of this event the P a...
The Global Seismic Hazard Assessment Program (GSHAP) - 1992/1999
Earthquake seismic hazard assessment UN/IDNDR seismic risk mitigation
2015/9/30
The United Nations, recognizing natural disasters as a major threat to human life and development, designed the
1990-1999 period as the International Decade for Natural Disaster Reduction (UN/IDNDR; ...
Local magnitude, duration magnitude and seismic moment of Dahshour 1992 earthquakes
Dahshour 1992 earthquake local magnitude moment
2015/9/30
Local magnitudes ML have been calculated for 56 earthquakes of the Dahshour 1992 sequence using simulated records of the KEG broadband station and the estimated calibration function of the Dahshour ar...
Spectral analysis of the clinometric data at the Phlegraean Fields from 1992 to 1998
Spectral analysis Phlegraean Fields clinometric data
2015/9/29
Ground deformation is one of the most important precursors for volcanic eruptions. In this respect, the surveillance of volcanoes has greatly benifited from the continuous recording of clinometric dat...
Seismological aspects of the Cairo earthquake, 12th October 1992
Cairo earthquake source parameters spectral magnitude focal mechanism aftershock stress tensor inversion
2015/9/28
On 12 October 1992 a significant earthquake (MB = 5.8) occurred southwest of Cairo in the vicinity of the Dahshour region. For the mainshock, an average moment release M 0 = 9.70E17 n-m; a fault lengt...
The 1962–1992 period spanning the research vessel Eltanin/
Islas Orcadas expeditions to Ice Station Weddell, and the following World Ocean
Circulation Experiment, may be viewed as the closing phase...
Dialectical Materialism and the Construction of a New Quantum Theory:David Joseph Bohm,1917–1992
Dialectical Materialism New Quantum Theory David Joseph Bohm
2015/3/26
Dialectical Materialism and the Construction of a New Quantum Theory:David Joseph Bohm,1917–1992.
Wave-equation-based travel-time seismic tomography – Part 2: Application to the 1992 Landers earthquake (Mw 7.3) area
High resolution 3 d P wave S wave crust velocity poisson's ratio model landers earthquake earthquake fault
2015/1/6
High-resolution 3-D P and S wave crustal velocity and Poisson's ratio models of the 1992 Landers earthquake (Mw 7.3) area are determined iteratively by a wave-equation-based travel-time seismic tomogr...
1992-2007全球海平面变化
海平面变化 海平面高度异常 海平面上升 海表面温度
2013/4/9
引起全球海平面变化的因素是复杂多样的，大气压、风、大洋环流以及海水密度的变化，都会引起海平面在时间、空间上的变化，而海水温度的变化是海平面变化的主要原因。该文利用法国 Ａｒｃｈｉｖｉｎｇ，ＶａｌｉｄａｔｉｏｎａｎｄＩｎｔｅｒｐｒｅｔａｔｉｏｎｏｆＳａｔｅｌｌｉｔｅＯｃｅａｎｏｇｒａｐｈｉｃｄａｔａ（ＡＶＩＳＯ）的海表面高度异常数据，计算了 １９９２年 １０月至 ２００７年 １月间，全球海平面的平均...
Redescription of 224; Cobitis longipectoralis Zhou, 1992 (Cypriniformes: Cobitidae) from late early Miocene of East China
Cobitis longipectoralis late early Miocene East China
2014/3/26
Here we revise a fossil cobitid species 224;Cobitis longipectoralis Zhou, 1992, based mainly on a well-preserved specimen col-lected recently from the taxon’s type locality of the late early Miocen...
Cytogenetic analysis of Pseudophoxinus antalyae, Bogustkaya, 1992 (Pisces: Cyprinidae) from the Eastern Mediterranean River Basin, Turkey
Pseudophoxinus antalyae karyotype banding Turkey
2010/3/24
The karyotype of Pseudophoxinus antalyae was analyzed using G-banding, C-banding, Ag-NOR staining, and Q-banding. Chromosome analysis of this species, which lives in the Berdan River and Berdan Dam La...
Hydrologic effects of land and water management in North America and Asia：1700–1992
water management North America
2009/5/7
The hydrologic effects of land use changes, dams, and irrigation in North America and Asia over the past 300 years are studied using a macroscale hydrologic model. The simulation results indicate that...
NEW ORBITS OF BINARY STARS ADS 1473 AND ADS 1992
BINARY STARS ADS 1473 ADS 1992 NEW ORBITS
2009/4/22
NEW ORBITS OF BINARY STARS ADS 1473 AND ADS 1992。