变化系数

The activity coefficient of NaCl in mixed solution of water and 1, 2-propanediol were measured using conductivity method, and the relationship between activity coefficient and concentration of mixed solution were discussed.

应用电导法测定了NaCl在混合溶剂（1， 2-丙二醇和水）中的活度系数，讨论了电解质溶液活度系数与浓度的关系，并计算了NaCl在混合溶剂中的相对偏摩尔自由能，对其相对偏摩尔性质的某些变化规律作了初步的讨论。

To improve the quality of the image, the defocusing error was used to balance the piston error, spherical aberration and astigmatism, and the results were significantly improved, especially the wave surface variance caused by spherical aberration was decreased by 90%.

运用离焦误差对piston误差、球差和像散进行像差平衡，其效？灾乇鹗乔虿钜鸬牟娣讲钕陆？0％。系统各项像差系数随子孔径数的增加而降低；当子孔径数大于6时，各像差系数变化缓慢。

A mathematic model,which deals with the relationship between maximum temperature of thick plate butt multipass welding and weld heat input,interpass temperature,ambient temperature and the distance of measuring points to heat source center,was founded using multivariant nonlinear regression analysis.

采用多元非线性回归的方法，建立了厚板对接多道焊的最高温度与焊接线能量、层间温度、环境温度以及测点到热源中心的距离之间的数学模型。通过相关性检验、线性回归的显著性检验以及回归系数的显著性检验，证明了模型可行；同时分析了回归系数与测点到焊缝中心距离之间的关系。结果表明，它们之间的关系是一种非线性关系，而且呈现出了一定的变化趋势

Temperature field of cross section, full curve under fire and related factors of them are analyzed.

5对轻钢-混凝土组合梁的抗火性能进行了研究：分析了截面的温度场及其影响参数；计算了构件的抗火全过程曲线，并分析了截面参数对全过程曲线的影响；采用抗力折减系数的方法研究了轻钢-混凝土组合梁承载力随受火时间的变化，并分析了各参数对抗力折减系数的影响

By proving the time decay coefficient and usage effecting coefficient, the fuzziness and dynamic variation characters are considered and resolved.

通过引入时间衰减系数及行为影响系数，较好地解决了信任的模糊性随时间及行为变化的动态性的特点。

A new parameter is introduced here to measure the locality of particle distribution. The relationship between local coefficient and particle density is simulated with random updating rule and critical density is measured, which is in conformity with the critical density of the system.

我们引入了一个新的参量局域化系数来度量系统粒子分布的局域性，数值模拟了在随机动力学规则下的局域化系数随粒子密度的变化关系，得到临界密度，结果与解析得到的系统临界密度相符。

The relations expressing the corresponding changes of the Factor A and Factor B in the binomial with the deviation factor and viscosity of natural gas are derived in the paper.

文章推导出二项式系数A、B随天然气偏差系数和粘度对应变化的关系式。

To better understand the mechanism of sucrose accumulation, the correlation of sucrose content and sucrose phosphate synthetase、sucrose synthase expression was analyzed by monitoring the expression of SPS in leaves and stems.(1) The results of SPS investigating indicated that the sucrose content, the expression of SPS in leaves and stems were increased along with the growth of sorghum, reached the highest level at grain filling stage, and decreased at dough stage.

1对SPS表达检测结果表明，在高粱的生长发育过程中，茎中蔗糖含量、叶片和茎中SPS蛋白质表达量持续上升，灌浆期达到最高，腊熟期略有下降，它们之间的变化趋势基本一致，甜高粱茎蔗糖含量与叶片SPS蛋白质的表达相关系数为0.895，与茎SPS蛋白质的表达相关系数为0.781；甜高粱和普通高粱相比，其叶片中SPS表达量差别不明显，而甜高粱茎中SPS表达量明显高于普通高粱。

Quenching of chlorophyll fluorescence decreased and Non-photochemical Quenching of chlorophyll fluorescence increased for both alfalfas under drought stress. Generally speaking, qP decreased less and qN increased more in the high drought-resistance alfalfa than in the low drought-resistance alfalfa, suggesting that when under drought stress, the electron transport activity and photosynthetic apparatus was damaged less in the alfalfa with high drought-resistance than in the alfalfa with low drought- resistance.

PSⅡ光化学淬灭系数、非光化学淬灭系数的变化表现为干旱胁迫下两种紫花苜蓿qP值降低、qN值升高，总体上抗旱性强的紫花苜蓿qP降低的幅度低且qN升高幅度大，表明抗旱性强的紫花苜蓿PSⅡ反应中心电子传递活性受到的影响小，光合机构的损伤程度低。

A high-speed camera is used to visualize the flow structures,and Laser Doppler Velocity is employed for velocity measurement.The osculations are conducted on the two-dimensional hydrofoil section,based on a single-fluid model of the cavitation:the liquid/vapor mixture is considered as a homogeneous fluid whose eompsition is regulated by mass tranfer equation.The RNG k-ε turbulence model with modified eddy viscosity coefficient is used for computing,and the coefficient is related to the vapor and liquid densities in cavitated regions for simulating the cavitating flow.

实验采用高速录像技术观察了云状空化随时间的结构变化，应用 LDV 测量了云状空化条件下翼型周围的速度分布；采用 N-S 方程和基于空泡动力学方程的空化模型计算了绕水翼云状空化流场，湍流模型采用了 RNG k-ε方程，为了改善空化流动的计算精度，引入了一种与空化区域水汽相密度相关的系数，对湍流涡黏性系数进行了修正。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。