在数

In most cases the pain lasts from a few days to a few weeks, but in some cases can last longer and reoccur.

在大多数情况下，疼痛持续由数天至数星期，但在某些情况下可以持续更长的和再次发生。

Suppose a group of trees were felled in the same year, what could be said about the range of the number of sapwood rings found on the trees?

现已知生长在肯特的橡树平均边材环数大约为25而且有90%的机会边材环数在15-35之间。怎样用模型来表示这种变化？

5The OCT reconstruction is notstable in the meaning of L2 norm,but extended to Sobolev space,it has a stablebehavior.

5OCT的重建问题在一般L2范数意义下是不稳定的，即系统可能因为小的扰动而剧烈震荡；但在Sobolev空间、规定的范数意义下，能够保证，理想的OCT数学模型中的重建问题是稳定有界的。

In recovering a low dimensional parametrization of data lying on a low dimensional submanifold in high dimensional space, we need to understand and grasp the structure of image of the Laplacian Eigenmap.

在揭示建立在高维数空间中的一个低维子流形中的一个低维数的确定参数时，我们需要去了解并领会拉普拉斯特征映射的像的构造。

The differences of different demographic variables of team cohesion among handball players in universities and high schools: there was no difference in the universities' players with gender, age, team participating time, years for getting along with the coach, the highest achievement, training time a day, and training frequency a week; there was no difference in the high schools' players with age, team participating time, years for getting along with the coach, the highest achievement, and training time a day, but there was significant difference in the players with gender.

二、不同人口统计变项的大学院校与高中的手球选手团队凝聚力差异之分析：大学院校在年龄、运动年资、与教练相处年数、最高成就、每次训练时间、每周训练次数均无显著差异；高中方面除了性别之外，在年龄、运动年资、与教练相处年数、最高成就、每周训练次数均无显著差异。

The Reynolds number has different influence on the pressure coefficient and discharge coefficient under different velocity ratio.

在小速比下，雷诺数对压力系数、流量系数的影响较小，在大速比下，雷诺数对压力系数、流量系数的影响较大。

Animal's welfare can be feed back from their vocalism. We had some experiments to get 35 days old chicken's vocalization in different environment, including normal environment、 light off environment and people's disturbing environment. On the base of Mel Frequency Cepstral Coefficient, We introduction a new algorithm for feature extraction---Subband Mel Spectrum Centroid. We used support vector machine classification model to evaluate the performance of using different sound parameters.

本文通过研究35日龄海兰褐蛋鸡在正常状态、光照与人为干扰等应激下发声信息的变化特征，提出基于子带梅尔频谱质心的优化特征参数，并通过建立支持向量机模型，比较了采用优化特征参数与梅尔频标倒谱系数及其一阶、二阶导数组成的特征参数（MFCC_39）在识别不同应激中的应用效果。

A new wavemeter with cathode-ray for decimeter and centimeter waves is proposed, utilizing special deflections of cathode ray in a rapidly alternating field. When the wavelength of the deflecting field is short enough, the deflections can be made to have maximum and zero sensitivities or phase-shifts by adjusting the anode voltage.

著者新拟一量数分米或数厘米电波之波长计其法用阴极射线在极短波长之电场内之特殊偏侧在相当情形下，可由调节其阳极之电压，而使其偏侧之灵敏度或相差成极大或成零。

While in the experiments of impregnated raw materials, the main factors are sieve of wood flour, impregnated ratio and time.

在主要工艺参数对成板性能的影响关系中，研究结果表明，主要影响因素为木粉目数、原料含水率和热压温度；在浸渍处理模压实验中，主要影响因素为木粉目数、浸渍时间和液料比。

A numerical algorithm and a numerical experiment are given. 2. The least norm, positive semidefinite and positive definite real solutions of bisymmetric matrix equations (A~TXA, XA — YAD)=(D, 0)are considered by applying the generalized singular value decomposition.

利用广义奇异值分解讨论了矩阵方程(A~T XA，XA-YAE)=(E，0)在对称次反对称矩阵集合中的解、极小范数解和在双对称矩阵集合中的解、极小范数解及正定解； 3。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失