不变

The rainstorm process is a complex and stochastic multi-dimensional process.A correlation exists between the maximal annual period-storm and the rainfall duration,with overlooking many factors,the parameterwill not be a constant.Since 1980s,heavy rain and flood of small basins can be calculated by auto-recording rainfall observation system,and 20-year's self-recording rainfall data can improve the calculation accuraey.

暴雨过程是一个复杂的多维随机过程，年最大时段暴雨xt，p与暴雨历时t的暴雨公式属于经验相关关系，忽略了不少影响因素，因此，公式中参数n值不会是稳定不变的。20世纪80年代以后，随着自记雨量观测应用，到目前已经有20多年的资料系列，小流域暴雨设计的计算就可以直接利用时段实测降水资料系列进行计算，设计洪水时，可根据实测雨量时段资料，计算该设计流域的n值，可提高计算精度。

The experiments of light-weight steel frames with four types of different semirigid joints were carried out.

在钢框架分析和设计中，一般都假定梁柱之间没有相对转动，梁柱之间夹角不变的完全刚接或者梁柱之间不能传递弯矩，只能独立发生转动的理想铰接。

The results indicate that it is possible to identify and distinguish these siccative oils because the unsaturated acid had changed into azelaic due to oxidation and polymerization during the drying process to make the chromatogram of siccative oils have a typical peak of C9 compound and provide a finger marker of m/z 217, and the concentration ratio of palmitic acid to stearic acid remains constant with time to facilitate the differentiation of oils.

分析时采用了热裂解与甲基化同时进行的技术。分析结果显示，4种干性油的不饱和脂肪酸在成膜后的甲基化产物均为壬二酸二甲酯，离子质量与离子电荷量比值为217，是干性油的特征检测峰。4种油中不同含量的软脂酸和硬脂酸在干性油成膜前后的比值不变，为干性油的甄别提供了可能性。

The solar constant does not remain constant over long periods of time.

太阳常数不会保持不变长时间。

When the CDOM concentration ρ≥150mg/L, the excitation and emission wavelengths in the SFS spectrograms moved blue with decreasing CDOM concentration, and the SFS spectral shapes also changed; when ρ50mg/L, the excitation and smission wavelegths in the SFS spectrograms didn't move, and the SFS spectral shapes were invariant, but the fluorescence intensity decreased with decreasing CDOM concentration.

不同质量浓度CDOM水溶液的SFS显示，当质量浓度ρ≥150mg/L时，随着质量浓度降低，激发和发射波长也向短波长方向移动，其谱形也发生变化；当ρ50mg/L时，激发和发射波长不发生漂移，谱形不变，荧光强度随质量浓度降低而降低。

With the segmented mass contour, spiculated tissues surrounding the mass are detected, and a quantitative spiculation index is computed to assess the degree of spiculation.

其次，根据同一病患同侧乳腺组织拍摄的CC视图和MLO视图中相应肿块病灶区域在中轴线上的投影点与乳头之间的距离基本保持不变的性质，匹配了多视图中相应的可疑病灶区域，并基于匹配区域对提取了视图不变性特征和相似性度量特征。

By athletes, cheerful and have lived in the forehead was yesterday and tomorrow he never abandoned persistent squally day I rolled up waves fine day I was bright glassy not changed is the quality of racing current success and failure are engraved into the life of Li-Chun Du Qiugen and can be green scenery season I spent a brilliant golden season I wind is the fruit of life is the same vibrant teachers, Come on!

致运动员开朗和阴郁都曾写在前额昨天和明天都没有放弃执著狂风的日子里我是卷起的浪晴朗的日子里我是闪亮的玻不改的是奔流的本色成功和失败都镌刻进生活春履和秋痕都不失为景色绿色的季节里我是烂漫的花金色的季节里我是迎风的果不变的是生命的蓬勃老师，加油！

By athletes, cheerful and have lived in the forehead was yesterday and tomorrow he never abandoned persistent squally day I rolled up waves fine day I was bright glassy not changed is the quality of racing current success and failure are engraved into the life of Li-Chun Du Qiugen and can be green scenery season I spent a brilliant golden season I wind is the fruit of life is

开朗和阴郁都曾写在前额昨天和明天都没有放弃执著狂风的日子里我是卷起的浪晴朗的日子里我是闪亮的玻不改的是奔流的本色成功和失败都镌刻进生活春履和秋痕都不失为景色绿色的季节里我是烂漫的花金色的季节里我是迎风的果不变的是生命的蓬勃老师，加油！

According to Shilnikov Theorem, on the condition that satisfies the basic characteristics of heteroclinic orbit, Shilnikov inequality and the eigenvalue equation, by finding a heteroclinic orbit consist of three geometric invariant sets, namely unstable manifold, heteroclinic point, and stable manifold, a set of real parameters accordance with the condition of existing heteroclnic orbit is obtained in this chaotic system.

根据Shilnikov定理，在满足异宿轨道基本特性、Shilnikov不等式和特征方程条件下，通过寻找该系统中一条由不稳定流形、异宿点和稳定流形三个几何不变集构成的异宿轨道，在分段Sprott系统中导出了存在异宿轨道时该系统中各个参数应符合的条件，并找到了一组对应的实参数，由此证明了异宿轨道的存在性。

To apply ARIMA models the time series needs to be stationary. A stationary time series is one whose statistical properties such as mean, variance and autocorrelation are constant over time. If the initial time series is not stationary it may be that some function of the time series, e.g. taking the differences between successive values, is stationary.

运用ARIMA模型时时间序列必须是固定的，一组固定的时间序列是它的统计特性诸如平均值＼差异和自相关等随着时间的推移而始终不变，如果最初的时间序列不固定这是由它的某些函数引起的，以序列值之间的差额为例，它们是固定的

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。