Atmospheric precipitation

The main reason is affected by ground-based measurements of atmospheric refraction, atmospheric absorption and scattering, atmospheric gravity jitter as well as the telescope tube bending occurs under a variety of factors, such as observation accuracy and difficult to improve the observed star.

主要原因是地面测量受大气折射、大气吸收和散射、大气抖动以及望远镜在重力作用下出现的镜筒弯曲等多种因素制约，观测精度和观测星等难于提高。

Aiming at problems existing in the atmospheric catalytic combination units of Yangzhou Petrochemical Complex, such as ambiguous incision, large superposition of side-cut distilates in the atmospheric tower, new LLC-Tray stereomass-transfer tower plates were applied in the atmospheric tower to substitute conventional bar-shaped tower plates.

针对扬州石油化工厂常压催化热联合装置存在常压塔侧线组分分割不清、重叠较大等问题，选用一种新型LLC-Tray高效立体传质塔盘代替常规的条形塔盘；对比了塔盘改造前后装置的运行效果，并对改造后的装置进行了经济技术分析。

First, the atmospheric influence on FSO system and the character of atmospheric channel are analyzed, the SNR of atmospheric channel versus the weather visibility is deduced, and the coding and decoding principles of twofold turbo code are analyzed.

从研究大气对自由空间光通信系统的影响出发，在分析了大气信道特性后建立了大气信道信噪比和能见度的关系，详细阐述了双模turbo码的编码、译码原理。

Firstly, the GPS data in Naqu, Gaize, Deqn, Tengchong, Mengzi and Simao are processed, the change of remote sensing water vapor using six ground GPS receivers in Tibet Plateau and Yunan province are analyzed, the results based on GPS with those based on the radiosonde data are compared, and the relationships between the amount of atmospheric water vapor and the ground vapor pressure, ground temperature and precipitation are studied. It shows that the annual amount of atmospheric water vapor is about 0.2~2.0cm over Tibet Plateau and 0.5~4.5cm in Yunan province.

首先通过解算青藏高原那曲、改则和德钦以及云南腾冲、蒙自和思茅共6个站的地基GPS大气水汽探测资料，获得了这些站的大气总水汽量；分析了这些站的大气总水汽量的变化特征；通过比较那曲、腾冲、蒙自和思茅地基GPS遥感与探空结果，分析了地基GPS遥感结果的精度；同时还分析了大气总水汽量与地面气象要素之间的关系。

It is shown that GPS/PWV data with an time interval of 30 minutes reflected spatial and temporal changes of atmospheric vapor intuitionally and duly, the features of GPS/PWV changes had corresponding relations with the precipitation, the divergence of GPS/PWV showed the distributions of the convergence and divergence of atmospheric vapor.

分析还表明：每30min一次的GPS/Pwv资料能直观地、及时地反映大气中水汽的时间变化和空间变化；GPS/Pwv资料随时间的演变特征与降水有较好的对应关系；GPS/Pwv的散度资料可以反映大气中水汽的辐合、辐散分布情况。

The hydrologic cycle, a major topi c in this science, is the complete cycle of phenomena through which water passes, beginning as atmospheric water vapor, passing into liquid and solid form as precipitation, thence along and into the ground surface, and finally again returning to the form of atmospheric water vapor by means of evaporation and transpiration.

水文循环，作为该学科中的一个主要课题，指的是水所经过的诸现象的整个循环过程，开始时是作为大气中的水蒸气，转而作为雨、雪、露、雹一类的降水量经过液体和固体形态，由此而沿着地层表面分布或进入地层表面，最终通过蒸发和散发作用再度回复到大气水蒸气的形态。

Pass the analysis of pair of sensitivity test results, making clear flux of lunt of face of bureau ground underlay is the intensity that through changing low layer atmospheric the layer writtens guarantee the structure will affect precipitation and main precipitation period of time.

通过对敏感性试验结果的分析，表明局地下垫面水汽通量是通过改变低层大气的层结结构来影响降水的强度和主要降水时段的。

The conditional probability density functions of daily precipitation in 16 stations of Guangxi in Summer are estimated and then the probability distributions of maximum amount of daily precipitation in 1-20 days are recurrented by using daily amount of precipitation data set.

对广西16站用6、7月逐日降水量资料估计了日降水量的条件概率密度函数，并递推得1-20天内最大日降水量的概率分布。

Results indicate that the ensemble precipitation probability forecasts made by the three methods above-mentioned all can give accurate estimation of center and region of the precipitation, and the "Rank" is superior to the "Average" and "Correlation" for performing better in forecasting the areas, intensity and boundary of precipitation but the other two expand improper areas.

结果表明：用上述3种方法制作的多模式短期集合概率预报都能对降水落区及中心做出较准确的预报，但平均法和相关法易使降水落区虚假放大，Rank法则能较好地刻画降水落区边界及强度，其概率预报效果优于平均法和相关法结果。

METHODS Using a combination of cryoglobulin precipitation,euglobulin precipitation, ion-exchange chromatography,(NH4)2SO4 precipitation and affinity chromatography, the impurity protein of different quality was removed, and the easy and effective condition was selected toincrease the purity and content of C2 in the final product.

方法利用冷球蛋白沉淀、优球蛋白沉淀、离子交换色谱、硫酸铵沉淀和亲和色谱几种方法，将血清中不同性质的杂蛋白除去，选择相对简单且分离效果好的条件，提高终产物中目标蛋白C2的纯度和含量。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"