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the evolutionary characteristics
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  演化特征
     On the basis of the evolutionary characteristics of the Mesozoie and Cenozoic epiconti-nental arcs in Jilin province ,they can be divided in three stages, i. e. epicontinental arc eleva-tion fracture(3 K ̄1_1), epicontinental are elevation depression(K ̄2_1-K_2) and epicontinentalarc splitting(E Q)。
     依吉林省中、新生代陆缘弧发展演化特征,将其划分为三个发展演化阶段,即陆缘弧隆断阶段(T_2—K ̄1_1)、陆缘弧隆拗阶段(K ̄2_1—K_2)和陆缘弧裂解阶段(E—Q)。
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     THE EVOLUTIONARY CHARACTERISTICS AND STUDY OF URANIUM MINERALIZATION CONDITIONS OF EARLY PRECAMBRIAN BASEMENT AND OLD GRANITOIDS IN NORTHERN HEBEI PROVINCE OF CHINA
     冀北早前寒武纪基底与古老花岗岩类演化特征及其铀成矿条件研究
短句来源
     THE EVOLUTIONARY CHARACTERISTICS OF PROTEROZOICEARLY PALEOZOIC CONTINENTAL CRUST IN THE EAST PART OF SOUTH CHINA AND DISCUSSION ABOUT URANIUM PROSPECTING DIRECTION
     华南东部元古宙-早古生代陆壳组成演化特征与铀找矿方向探讨
短句来源
     STUDY ON THE EVOLUTIONARY CHARACTERISTICS OF VIBRATION DURATION RATIO OF CODA WAVE BEFORE AND AFTER XIUYAN Ms5.4 EARTHQUAKE
     岫岩5.4级地震前后尾波振动持续时间比的演化特征
短句来源
     Bascd on the evolutionary characteristics of the U-Pb isotopic system and the data of the isotopjc composition of oxygen and sulphur, it is suggested that the uranium deposit has multi-sources, the main uranium source of which is from the stratum itself.
     根据铀-铅同位素体系演化特征以及氧、硫同位素组成资料,提出本铀矿床的铀源是多源的,而主要铀源来自地层本身。
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  “the evolutionary characteristics”译为未确定词的双语例句
     The evolutionary characteristics of both stems and loops of 16S rRNA gene partial sequence were analyzed.
     分析了鮡科鱼类16S rRNA基因部分序列茎区(stem regions)和环区(loop regions)的进化特点;
短句来源
     A Study on the Evolutionary Characteristics of Urban Space in the Condition of Information Technology
     信息化条件下城市空间演化的特征研究
短句来源
     The flow of passenger,freight transport,infrastructure,people transportation as well as passenger and freight exchange from 1985 to 2005 of every city in the three growth poles are analyzed. The time-spatial evolutionary characteristics in this period are comprehensively and comparatively studied. The evolutionary characteristics and the development trends are also discussed.
     通过对三大增长极1985年-2005年各城市客货运量、基础设施密度指数、人口流和客货交换量进行归纳整理,采用相关模型公式和计算软件进行统计分析,对三大增长极的演化进行全面的比较分析,得到了三大增长极的演化特点,进而探索三大增长极物流经济联系未来发展的新特点和新趋势。
短句来源
     The evolutionary characteristics of the prophase and synchronous SSTA fields, wind fields and OLR fields are also analyzed.
     分析了高原季风强弱年同期和前期SST场、风场和OLR场演变特征。
短句来源
     Through of use airphotoes and satellite pictures of multi|time and multi|wave bands and the newest TM+ETM photograph,this paper detailed studied the evolutionary characteristics of the Yangtze River course in Jiangxi section according to take the methods with eye|sighting explanation and picture disposal technique in computer,as well as analyse the historical data.
     利用多时段的航卫片和最新的TM/ETM+图像,采用目视解译和微机图像处理相结合的方法,辅以历史资料分析,对江西长江河道的演变特征进行了详细研究。
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  相似匹配句对
     EVOLUTIONARY COMPUTATION
     演化计算
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     EVOLUTIONARY ROBOTS
     进化机器人
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     Darwin's evolutionary theory and G.
     Darwin的进化论和G.
短句来源
     The evolutionary structural optimization
     然后,结合结构应力和应力灵敏度,给出了多工况静力载荷下考虑静应力约束的结构优化准则和算法。
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     And the characteristics of the G.
     通过仿真和实验,也验证了G.
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  the evolutionary characteristics
To assess the evolutionary characteristics of 10 NDV strains isolated from chickens in Kazakhstan during 1998 we investigated the phylogenetic relationships among these viruses and viruses described previously.
      
We present in this paper the evolutionary characteristics of the systems belonging to two evolution types, designated as 1C2COf and 1Nc2COf, among seven evolution types which were studied in the preceding paper of this series.
      
The influence of initial helium content on the evolutionary characteristics of super-metalrich stars (Z=0.10) has been investigated.
      
Mycoplasmas are, however, unlike almost all other bacteria in the evolutionary characteristics of their ribosomal RNAs.
      
A preliminary study on the evolutionary characteristics of rare earth elements (REE) in granitoid rocks and their formation mech
      
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Bascd on the evolutionary characteristics of the U-Pb isotopic system and the data of the isotopjc composition of oxygen and sulphur, it is suggested that the uranium deposit has multi-sources, the main uranium source of which is from the stratum itself. The mineralizing solutions are considered as a mixed system of metamorphic and meteoric water. The minerogenetic process of this deposit has undergone pre-concentration during diagenetic stage, primary concentration in Caledonian folding metamorphism and...

Bascd on the evolutionary characteristics of the U-Pb isotopic system and the data of the isotopjc composition of oxygen and sulphur, it is suggested that the uranium deposit has multi-sources, the main uranium source of which is from the stratum itself. The mineralizing solutions are considered as a mixed system of metamorphic and meteoric water. The minerogenetic process of this deposit has undergone pre-concentration during diagenetic stage, primary concentration in Caledonian folding metamorphism and multisuperimposed reconcentration which took place at 75±4m.y.. 43±7m.y. and 22±2m.y.ago, These processes are closely related to the development history of the regional geological tectonic act vity. Therefore, we consider it to be a strata-bound uranium deposit of the multi-source and later multi-superimposition.

根据铀-铅同位素体系演化特征以及氧、硫同位素组成资料,提出本铀矿床的铀源是多源的,而主要铀源来自地层本身。成矿溶液是变质水和大气降水的混合体系。本矿床的成矿过程经历了成岩阶段的预富集,加里东褶皱变质时的初富集以及发生在75±4、43±7和22±2百万年时的多次铀矿化迭加再富集作用。这些作用过程与区域地质构造发展史有密切联系。因此,我们认为该矿床为多源、晚期多次迭加作用形成的层控铀矿床。

According to an analysis and study of the data of regional geology, this paper discusses in detail the nature and age division of the Indosinian movement on the Qinghai-Tibet plateau and the evolutionary characteristics of the plateau. The age and sequence of various stages and episodes of the Indo-Sinian movement are shown as follows. The evolutionary characteristics of the Indosinian Qinghai-Tibet plateau are as follows: I. In the Hercynian, India and Cathaysia were subjected to extension and disintegration....

According to an analysis and study of the data of regional geology, this paper discusses in detail the nature and age division of the Indosinian movement on the Qinghai-Tibet plateau and the evolutionary characteristics of the plateau. The age and sequence of various stages and episodes of the Indo-Sinian movement are shown as follows. The evolutionary characteristics of the Indosinian Qinghai-Tibet plateau are as follows: I. In the Hercynian, India and Cathaysia were subjected to extension and disintegration. From the continent to the center of the oceanic basin, there occurred successively continental fluvial-lacustrine formation→continental-margin plateau carbonate formation→continental rise or slope (miogeosyncline) flysch formation→abyssal siliceous volcanic rock (flysch) formation→ophiolitic m lange formation, which shows the feature of symmetrical spreading of the ocean (geosyncline). 2. In the early Indosinian, the Qingling, Qilian and Kunlun sea basins first closed, in the middle Indosinian, the Bayan Har Sea closed and Cathesia aeereted up to the vicinity of the Nujiang River~ in the late Indosinian,the Tethyan Sea of Qinghai-Tibet further shrank, giving rise to asymmetricalclose-up of the ocean and unidirectional inversion of the geosyncline. 3, Qiang-tang, Tanggula, Qamdo and the "Sanjiang (Three-River)"region lying betweenthe Nujiang-Bangong Co and Jinshajiang fault belts were assembled by the In-dian and Cathesian land masses which have different natures.

本文从区域地质资料分析入手,将青藏高原印支运动划分为早、中,晚三幕五期。详细介绍了印支运动各幕的地质证据、活动性质、分布范围、沉积建造特点,并对印度和华夏古大陆之间的特提斯海的构造演化历史及其基本特征进行了初步的探讨。

In this paper the well-known solar active region McMath 12094 of Oct. 1972 is taken-as an example to investigate the relation between the magnetic field twist and the flare occurrence rate in a solar active region. Adopting a model of constant a force-free magnetic field for the region and taking the observed photospheric longitudinal magnetic field as the boundary condition, the values of force-free factor a, which represent the average level of magnetic twist in the region, are calculated for the four days...

In this paper the well-known solar active region McMath 12094 of Oct. 1972 is taken-as an example to investigate the relation between the magnetic field twist and the flare occurrence rate in a solar active region. Adopting a model of constant a force-free magnetic field for the region and taking the observed photospheric longitudinal magnetic field as the boundary condition, the values of force-free factor a, which represent the average level of magnetic twist in the region, are calculated for the four days when the region was near the center of solar disk (28-31 Oct.). The nusing these a values, the three dimensional configurations of the lines of magnetic force are extrapolated. Based on these data, the evolutionary characteristics of the magnetic field as well as the relation between the magnetic field twist and the flare occurrence rate are discussed. Finally, the electric current in the preceding sunspot A of the region the electric current density and the stored magnetic energy caused by the on of the sunspot A are estimated under the approximative model of an unipolar magnetic field. The main conclusions obtained are as follows.1) The magnetic field twist in McMath 12094 was rather strong since 28 Oct. and reached a maximum on 30 Oct.. After 31 Oct. it became weaker. The principle source of the magnetic twist was the counterclockwise rotation of the preceding sunspot A, which was caused by MHD in the photosphere.(2) The values of the force-free factor a which represent the average level of the magnetic twist varied in parallel with the flare occurrence rate, indicating that the latter is proportional to the magnetic field twist in the region.(3) The electric currents through the umbra of the large preceding sunspot A are 4.3-6.6 ×1012 A. The stored free energies caused by the magnetic twist are 0.44-1.11×1032 erg. The densities of electric current in the region rise up to 0.96-1.47×10-2 A/m2. Probably these high densities are responsible for making the active region with high occurrence rate of flares.

本文以1972年10月的太阳活动区McMath 12094为范例,研究了活动区磁场扭绞与耀斑产率的关系.先在常α无力场模型假定下,以观测到的活动区光球磁场为边值,对活动区在日面中心附近4天(10月28—31日),推算出代表活动区磁场平均扭绞程度的无力因子α,从而外推出活动区在这4天的三维磁力线形态.然后以这些资料为基础,进一步讨论了活动区磁场演化特征,磁场扭绞与耀斑产率的关系,并且近似用单极场模型估算了通过活动区前导大黑子A的电流、电流密度以及因大黑子逆时针旋转造成磁场扭绞所贮存的能量.本文主要结论为:(1)活动区McMath 12094从10月27日起保持较强扭绞,10月30日达到极大,10月31日后扭绞减弱.活动区磁场扭绞的主要原因是光球中的磁流体力学作用所导致的前导大黑子A的逆时针旋转。(2)代表活动区磁场平均扭绞程度的无力因子α与活动区耀斑产率同步变化,表明活动区磁场扭绞与耀斑产率成正相关.(3)通过活动区前导大黑子A的本影电流为4.3—6.6×10~12A,因扭绞产生的自由能贮存为0.44—1.11×10~32erg.活动区中的电流密度达到0.96—1.47×10A·m~(-2).这样高的电流密度可...

本文以1972年10月的太阳活动区McMath 12094为范例,研究了活动区磁场扭绞与耀斑产率的关系.先在常α无力场模型假定下,以观测到的活动区光球磁场为边值,对活动区在日面中心附近4天(10月28—31日),推算出代表活动区磁场平均扭绞程度的无力因子α,从而外推出活动区在这4天的三维磁力线形态.然后以这些资料为基础,进一步讨论了活动区磁场演化特征,磁场扭绞与耀斑产率的关系,并且近似用单极场模型估算了通过活动区前导大黑子A的电流、电流密度以及因大黑子逆时针旋转造成磁场扭绞所贮存的能量.本文主要结论为:(1)活动区McMath 12094从10月27日起保持较强扭绞,10月30日达到极大,10月31日后扭绞减弱.活动区磁场扭绞的主要原因是光球中的磁流体力学作用所导致的前导大黑子A的逆时针旋转。(2)代表活动区磁场平均扭绞程度的无力因子α与活动区耀斑产率同步变化,表明活动区磁场扭绞与耀斑产率成正相关.(3)通过活动区前导大黑子A的本影电流为4.3—6.6×10~12A,因扭绞产生的自由能贮存为0.44—1.11×10~32erg.活动区中的电流密度达到0.96—1.47×10A·m~(-2).这样高的电流密度可能是该活动区高耀斑产率的重要原因.

 
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