查询词典 precipitation

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。

The model results show that the hail embryos are mainly graupel particles.Solid phase precipitation accounts for 46% of ground precipitation amount and graupel-fall is 65% of solid phase precipitation.Graupel particles grow by accretion with rainwater and cloud water.Accumulation zone of supercooled water...

结果表明：玛曲冰雹云中冰雹胚胎以霰胚为主；在地面降水中，固态降水占降水总量的46%，而霰占固态降水的65%，霰主要靠撞冻雨水和云水增长；雹云中存在较弱的过冷雨水累积带，累积带的维持时间也很短，累积带中的过冷雨水有利于雹块的增长，但不起主要作用；雹块的增长主要是通过雹撞冻云水，其次是撞冻雨水增长。

This showed that capacity of water-holding in biological soil crusts were obvious improve,and effected precipitation permeate or water second distribute process.The study results of"fertile islands"formation mechanism in biological crusts showed that biological crusts layer cover could increased nutrients content for below sand soil through precipitation permeate washing,and it promoted plants assimilate more nutriment.The matter import ways of biological soil crusts fertility island had many ways,including the effection of living macrobiotics metabolism in crusts levels,wind-sand flow of near surface,dust deposition and plants decomposition course,etc.Source of particle matter in biological soil crusts was wind-sand flow of near surface,and not dust deposition.Biological crusts layer cover had preserved effection for nature water content in 0-5cm soil layer,compared with the sand of no biological crusts layer,effecting precipitation permeate,and could not obvious restrained from the water evaporate process indoor experiment.

生物结皮层肥岛形成机制的研究结果表明：生物结皮层覆盖能够通过降水淋溶作用而增加下层土壤养分的含量，进而促进植物对养分的吸收；生物结皮层养分输入有结皮生物代谢、降尘、风沙流和植物分解矿化作用等多(来源：A73e3B3eC论文网www.abclunwen.com)种途径，但生物结皮层的颗粒物质来源主要是近地表风沙流，而不是大气降尘；生物结皮层覆盖对0-5cm土层自然含水量有一定的保护作用，并影响降水向深层渗透，不能有效的阻止表层水分的蒸发进程；研究表明采取人工促进技术能够在流动沙丘上形成生物结皮层，实现流动沙地的快速治理。

We gain the distributing instance as a whole by the spatial analyse of the daily、 mensal and annual precipitation.Then, we adopt mean error、 mean absolute error、 mean relative error、 and the root mean squared interpolation error and the correlative coefficient as the determinant standard of interpolation effect. The results show that the mensal precipitation effect of SIA is the best, and the daily precipitation effect is worse reversely.

然后，对年降水量、月降水量以及日降水量的SIA结果采用平均误差、平均绝对误差、平均相对误差、插值平均误差平方和的平方根误差以及相关系数作为判定插值效果的标准，并得到以下结果：月降水量的SIA效果最好，日降水的相对较差。

The impact of rain gauge measurements is to increase the precipitation estimated from satellite data. The main difference is in Taiwan and the southeastern China where satellite retrieval underestimates the precipitation rate during boreal spring and summer. For the different precipitation climate analyses, the Legates- Willmot rainfall climate analysis produces the largest annual mean regional rainfall.

微波放射的雨量反演比微波散射法所估计的雨量略高，增加了测站雨量计分析的综合估计，使得区域平均年降雨量比只用卫星资料的估计大，而主要的差异是源自於春、夏季以及台湾与大陆东南沿海地区，显示卫星资料低估区域的锋面降雨。

Results show that there are multi-time scale periodic variations in AOI, the temperature and precipitation in Northwest China with significant syntonic periods of qausi-3 a between AOI and the precipitation, while the multi-time scale correlations between AOI and the temperature are quasi-2 a, 3-5 a and about 8-11 a with the strongest coherency in 8-11 a syntonic period. The influence of AO on temperature is more remarkable than that on precipitation in Northwest China for the interaction of their interdecada1 variation.

结果表明，AOI、西北地区降水和气温变化都存在着不同尺度的周期振荡，西北地区降水与AOI之间存在准3 a尺度的显著共振周期，而AOI与西北地区气温变化的多时间尺度相关表现为准2a、3~5 a和8~11 a左右的显著相关振荡且以8~11 a共振周期的凝聚性最强；AO对西北地区气温变化的影响比对降水的影响更显著，与其年代际尺度的相互作用有关。

The wavelet variance verification also indicates that the first main period of the runoff of mountainous watershed in the Shiyang River Basin is 30years, and 22years and l5years are the second and third period respectively; 3 Then we also compared the total runoff of mountain watershed with climate factors of Wushaoling which station is in the mountain headstream area, such as precipitation and temperature, the data record that the correlation coefficient of annual runoff and precipitation variation over the upper reaches in the Shiyang River Basin is 0.61 ,which indicates precipitation is the main water recharge of the runoff.

石羊河流域出山口年径流的周期变化与乌鞘岭站年降水量和年均气温周期基本上都能在同一周期上下浮动，其中出山口年径流量与乌鞘岭山区年降水量相关系数为0.61，说明地表径流量主要是由山区降水补给；年径流量与山区年均气温变化呈0.28的反相关，说明该流域近50年来出山口径流与山区气温呈反比，即径流量随年均气温上升而减少，相关性暂时不十分明显。

The APW in summer is less than 25 mm which is the least limit value of monsoon areas.This means that Xinjiang is not affected by monsoon.The geographic distribution of APW is adverse with that of precipitation,videlicet,higherAPW values corresponding to lower precipitation values.With the effects of westerly winds,the APW mode presents as an uniform change within Xinjiang area and has a stable distribution.It is very different from Xinjiang rainfall mode which changes a lot spatially.As mentioned above,there is no obvious change during 1961～2000,this indicates that APW is not a dominant factor determining precipitation,it is the result of dynamic condition,water vapor convergence and other causes.

APW的地理分布与实际降水量分布相反，其最大区域却为降水量最小区，受西风带影响，新疆APW模态主要表现全疆一致变化，分布稳定，与降水模态分布差异性大有显著不同，且近40年来无显著变化趋势，表明决定新疆降水差异的根本原因不在于水汽的多少，而是由降水产生的动力条件、水汽辐合和其它因素差异决定的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。