查询词典 variation

There is slightly variation in Pn among the Pistacia vear varieties, but the curve of diurnal variation of Pistachio leaf photosynthesis all showed two peaks. This fact indicated that there exists photoinhibition of photosynthesis in pistachio leaves under strong sunlight at noon.

阿月浑子光合特性因种源和品种不同而略有不同，但光合速率的日变化均呈双峰曲线变化模式，中午强光下发生了&光抑制&。

In this study, based on the Rnl, extinction coefficient k, transition coefficient of canopy layer stomatic resistance K', aerodynamics resistance ra and rc calculated with the data of Rn, LAI, rsi, the daily transpiration variation of Picea purpurea, Larix principisrupprechtii, Hippophae rhamnoides ,Betula platyphylla and Populus cathayana were studied in Datong County, Qinghai Province. Comparing with the practical transpiration variation measured by Li1600 Steady Porometer, the relative error of this model was less than ±15%, and the results were stabilized and tested by precision analysis.

本研究通过对Rn、LAI、rsi的实地观测，确定了林冠截流净辐射、消光系数、冠层阻力转换系数、空气动力学阻力和冠层整体气孔阻力，对青海大通地区紫果云杉、华北落叶松、沙棘、白桦和青杨的日蒸腾过程进行了模拟，与用快速称重法订正的Li1600稳态气孔仪实测蒸腾结果对比，模拟的相对误差在±15%以内；模型敏感性分析发现，温度、LAI以及rsi是决定模拟结果的主要参数，模型对各参数变化反应不敏感。

The karyotype of the genus Lycoris has great variation,we find some new karyotypes and new chromosome number by meticulous cytological analysis, especially in Lycoris radiata which karyotypes exist tremendous variation even in different population.

石蒜属植物的染色体核型变异很大，通过细致的核型分析，发现了许多新的核型和染色体数目；其中石蒜在不同居群中的核型存在巨大的变异。

The hourly monitoring performs some content following. The variation of dissolved oxygen saturability is the same as the variation of pH.

一天之内的逐时连续监测表明，溶解氧饱和度差值与pH 值差值的变化趋势是一致的。

In this paper, arrangement scheme of a novel multi-star phase shifted pole changing coil was given and the methods to determine coil split ratio were analyzed. According to electromagnetic theory, 2D electromagnetic mathematical model in which stator windings were spitted coil was developed, and magnetic field distribution of the novel motor at starting was solved by finite element method, starting performance of motor was calculated. Based on energy method, rotor slot leakage reactance under different poles and different loads were calculated, and the variation of rotor slot leakage reactance with loads was gotten. Based on time-step finite element method, distribution of branch current in stator windings and operating performance were calculated and analyzed when branch was unbalance, the method to calculate circulating loss in stator windings of novel multi-star phase shifted pole changing motor was given, and the effects of the loads variation and degree of unequilibrium on circulating loss in stator windings were calculated and analyzed.

论文系统的给出了采用分裂线圈法新型多星形移相变极绕组的排列方案，进一步分析线圈分裂比的确定方法；根据电磁场理论，建立了定子为分裂线圈绕组的电机二维电磁场数学模型，并采用场路耦合法求解了新型多星形移相变极电机起动时的磁场分布，计算了电机起动性能和基于能量法计算了不同极数下起动时转子槽漏抗和不同负载时转子槽漏抗，得出转子槽漏抗随负载变化的规律；采用时步有限元法计算分析了定子绕组支路不平衡时支路电流的分布情况及运行性能，给出了新型多星形移相变极电机定子绕组环流损耗的计算方法，分析比较了负载的变化和支路不平衡度大小对定子绕组环流损耗的影响。

D Social variation 社会变异 Social variation gives rise to sociolects which are subdivisible into smaller speech categories which reflect their socioeconomic, educational, occupational and ethnic background, as well as their sex and age.

语言的社会变异产生了社会方言。社会方言又可以分为更小的语言类别。导致语言社会变异的主要因素包括语言使用者的不同的社会地位，经济地位，学历，职业，年龄，性别等。

At the same time, the intensity ratio of the ICT fluorescence to the LE fluorescence, I〓/I〓, shows a "bell"-shaped variation with increasing CTAB concentration The intensity ratio was found to level off after the CMC of CTAB Together with the data from UV-Vis absorption spectroscopy, electric conductance measurements and the control experiments with tetramethylammonium bromide, it was concluded that the"bell"-shaped variation in the intensity ratio before CMC is due to the formation of premicelle aggregates consisting of ICT fluorophore and CTAB.

此时，ICT荧光强度与LE荧光强度之比，I〓/I〓随CTAB浓度增大而呈&钟形&变化。当CTAB浓度高于CMC时，I〓/I〓为一常数。根据紫外-可见吸收光谱，电导以及四甲基溴化铵对照实验的结果可知，当CTAB浓度低于其CMC时，I〓/I〓的&钟形&变化是由于长链对二烷基氨基苯甲酸与CTAB组成的胶束前簇集体形成所致。

Correlation analysis indicated that geographic variation of Tsuga dumosa was continuous by altitude gradient, and the variation was random by latitude factor .

相关分析得出地理变异在海拔梯度上呈连续渐变，在纬向上呈随机渐变。

The study purpose of surface structure is to develop corresponding depth-velocity model of surface structure, based on the variation of velocity and depth of surface and near surface uncemented sediments in seismic survey area, and using the static correction data from each observation point to delete the interference of the variation on adjacent channel.

表层结构研究的目的，是通过对地震勘探区内地表及近地表沉积物质速度和厚度的变化分析，建立相应的表层结构深度-速度模型，从而求取各观测点的静校正量，以消除地表及近地表速度和厚度变化对地震记录相邻道产生的静校时差。

In the context of a traffic flow system based on an O-D network, the variation of nonlinear dynamical behaviors and complexity of motion under the variation of uncongested traffic cost and capacity of the roads are discussed through bifurcation diagram and phase plot.

以交通流O-D网络系统为背景，通过分岔图和相图讨论了在无交通阻塞下的交通费用和交通容量变化下系统非线性动力学行为的变化和运动复杂性。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。