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化学空间
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  chemical space
     Chemical space analysis in effective components of Chinese herbs
     中草药有效成分化合物的化学空间分析
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     With the development of high-throughput screening(HTS) technology and in depth studies in chemical biology,exploring pharmaceutically relevant chemical space of natural products is vital.
     高通量筛选技术的发展和近年来化学生物学研究的深入,对拓展天然产物与活性相关的”化学空间”提出了新要求。
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  相似匹配句对
     SPACE
     空间
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     Development of space chemical propulsion technology
     空间化学推进技术的发展
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     CHEMICAL POTENTIAL AND CORRELATION OF PARTICLE SPACE
     化学势与粒子空间相关性
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     Spatial Planning
     空间布置
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     Shock Wave Chemistry
     冲击波化学
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  chemical space
Extrapolating these models to Pfizer chemical space is difficult due to P-glycoprotein (P-gp) mediated efflux.
      
The use of simple linear models for specific chemical series is also found to improve the correlation over a limited chemical space.
      
We examine degeneracy in the entire chemical space taking descriptors values from the alkane isomer series and the PubChem database.
      
Although these "random" methods sample larger areas of chemical space than traditional synthetic approaches, only a relatively small percentage of all possible compounds are practically accessible.
      
It is therefore helpful to select regions of chemical space that have greater likelihood of yielding useful leads.
      
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The fractal of geochemical field of gold from soil sample is studied here. It is based on the R/S method according to H. E. Hurst (1965). It is pointed out that the fractal structure of Au exactly exists in space. The basemental structure is clearly revealed in the fractal anomaly map. Thus, it answered the existing of a' series of phenomena of 'East-West Trendence' in Laojiezi district, Mid-Yunnan. Some deeper questions about fractal are discussed here also.

本文利用R/S分析方法,研究了滇中老街子金矿区土壤金地球化学分形,得出:土壤金地球化学的空间分形结构是存在的;其分维异常图清晰地揭示了一般地球化学方法所难干揭示的基底构造,从而顺利解释了该矿区一系列“东西向现象”,分形方法的实用性得以证明。在上述基础上,本文论述了分形是揭示作为混沌体系的地球化学场深层次规律的有效手段。

A deposit forming must hide a metallogenic space. The source of the metallogenic materials and the metallogenic mechanism were paid attention but the metallogenic space were overlooked. The metallogenic space is the main topic of this paper: it is divided into three types:1)the physical space; 2)physical-chemistry space;3)chemical space. The discussion on metallogenic space will be conducive to looking for hidden ores.

从成矿空间的形成机理上将成矿空间划分为 :物理空间、化学—物理空间、化学空间 ,这将有助于隐伏矿床的寻找。

Mt. Yulong is the southmost present glacialized area in Eurasia,where there are 19 typical sub_tropics temperate glaciers above 4000m a.s.l., formed under the climate of south_west monsoon. In the summer of 1999, investigations of glacial hydro_chemistry were carried out at the largest glacier, Baishui No.1 and 23 samples were collected from new accumulated snow, summer rain, glacial meltwater and glacier_feeding river at the different levels of the glacier.Chemical analysis of these samples show that isotopic...

Mt. Yulong is the southmost present glacialized area in Eurasia,where there are 19 typical sub_tropics temperate glaciers above 4000m a.s.l., formed under the climate of south_west monsoon. In the summer of 1999, investigations of glacial hydro_chemistry were carried out at the largest glacier, Baishui No.1 and 23 samples were collected from new accumulated snow, summer rain, glacial meltwater and glacier_feeding river at the different levels of the glacier.Chemical analysis of these samples show that isotopic and ionic contents of precipitation above the equilibrium line (4 800 m) is much higher than that below it, implying that the atmospheric vapor for precipitation came from different sources and a "precipitation effect" or "monsoon effect" may exist in this typical monsoon_climate region. Ionic contents of glacial meltwater were increasing with the decrease of elevation as a result of longer_time contact with the earth's surface. The highest content of Ca 2+ in all collected samples is closely related to local bedrock which mainly compose of limestone. Glacial hydro_chemistry of the studied area is characterized by a distinct spatial variability in various water bodies because of stronger physical and chemical activity of the temperate glacier, which differs from those of the continental glaciers. Glaciers have greatly retreated after the Little Ice Age because of warming of the climate. The recent 50 year climatic data at Lijiang, the closest meteorological station to Mt.Yulong, indicates that there are 2~3 year periodic changes for the local temperature and apparent 11~12 year periodic cycles for precipitation, showing a corresponding pattern with that in northeastern part of India. During the most recent half_century, glaciers in Mt. Yulong have alternately retreated and advanced, with smaller amplitudes. According to the trend of local climatin last 50 years and recent observation at the glacier Baishui No.1, the glaciers in Mt. Yulong start to advance in 1998 after a continuous retreat stage between early 1980's and late 1990's. However, as a result of a negative relation between temperature and precipitation in most cases of this region, the glaciers will keep a relatively stable state in the future overall trends, except for a case of abrupt large_scale global warming.

从我国玉龙雪山典型温冰川王白水 1号冰川不同区段表面融水 ,新近积雪和冰川补给河水采样分析结果表明 ,雪线以上降水中的稳定同位素和离子含量比雪线以下为高 ,低海拔河水比高海拔融水的氧同位素浓度为低 ,可能在来源上存在着差异 ,这种分布特征说明本温冰川区局部大气环流情况随高度而不同 ,有可能存在季风气候区所特有的“降水量效应”或“季节性效应”。冰川不同水体内离子浓度变化说明 ,冰川融水与地壳表面接触时间越久 ,其中的可融性离子浓度就越高 ,此外也与当地基岩岩性密切相关。冰川水化学的空间分布反映出温冰川化学溶解作用和物理活动性都比较强。小冰期以后气候变暖 ,玉龙山冰川后退的幅度也比较大。实测资料表明 ,50年代以来气候大体以 1 1a~ 1 2a的周期波动 ,受气候波动的控制 ,冰川时进时退 ,变化幅度不同。玉龙山冰川在经历了 1 980~ 1 990年的后退以后 ,最近又显示出前进趋势。在大部分时期内 ,除非突然出现全球大幅度变暖的情况 ,冰川受气温和降水非同步变化的制约 ,在总体趋势上是比较稳定的 ,不会很快消失 ,也不会突然大幅度前进

 
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