圆和

A set of complex Morlet wavelet are applied on projection slice of each direction to decompose each projection into several frequency channels,the average and variance extracted are computed in each frequency channel,and then linear regression model is employed to computer realationship feature between frequency channels.1-D DFT is applied to features and the amplitudes of Fourier coefficient are selected as features,then the extracted features are rotation invariant.

该算法是将一定大小的图像进行二维傅里叶变换；其次在变换后的图像中央选择一个圆盘区域，并在方向［0°，180°］内进行等间隔角度频率抽样，实现方向分解，使用一组复Morlet小波对每个方向上的映射切片进行小波变换，从而实现多通道频率分解；在各个频率通道中计算均值和方差作为特征，并利用线性回归模型计算频率通道之间的关系特征；将特征沿方向进行一维傅里叶变换并取其幅值，从而得到旋转不变性特征。

Sawing Machine: Stone Processing Machinery types of sawing a lot of, but still frame saw and diamond saw disc-based.

锯切加工机：石材的锯切加工机械种类很多，但目前仍以框架式锯机和金刚石圆盘式锯机为主。

The experiment results demonstrate the freehand circles can he recognized quickly and accurately, and the proposed method is stable and effective.

实验结果表明，该算法能快速、准确地识别出手绘图形中的圆，具有良好的稳定性和鲁棒性。

About how the French horn player sleeps with his wife at night?

讲的是法国圆号演奏者怎么和他老婆睡觉的故事

Unfortunately for her and our neighbors, I was dead set on playing the French Horn and I continued blasting away all the way from sixth grade until I graduated high school.

对于她和我们的邻居来说不幸地是，我已经横了下心要吹圆号了，而且从六年级开始就把它进行到底，一直到高中毕业。

I became active in the class. I joined the institute band, blowing the tuba and French horn, besides being elected as an active learner of Mao Zhedong's Works in the institute and also the supervisor of the dormitory.

我已经成为班级的活跃分子，除了被选为学院的学习毛著积极分子、集体宿舍的舍长外，还参加了学校的军乐队，吹起了大号和圆号。

The theme was echoed by the strings, exchanged between the french horn and the oboe, and the nostalgia was seamlessly restored when the theme finally returned to the strings.

主题在弦乐中回荡，在圆号和双簧管之间交换，当主题最终归于弦乐时，观众又回到了对往事的无限怀恋。

Eschewing the more traditional use of guitar or heavy keyboards that might be associated with the band's umbral sound, the instrumentation of A Whisper in the Noise has included the cello, violin, French horn, synth/electronic keyboard, bass guitar, and percussion in some variation.

很少使用吉它或重型键盘配合乐队阴沉声音的传统做法，A Whisper in the Noise所使用的乐器一定程度上包括了大提琴，小提琴，圆号，合成器/电子键盘，低音吉它和打击乐器。

In this system,the VVVF(variable voltage variable frequency) control method based on magnetic flux trajectory is applied.In the system,it is the target for the magnetic flux linkage polygon to be greatly approximate to the ideal magnetic flux circle.Considering such limitations as the low speed torque ripple,high speed real time and the working frequency of switching element,through the subsection synchronization control method by applying different numbers of magnetic flux linkage polygon for different frequency range,the perfect precision specifications for speed can be obtained.

系统采用基于磁通轨迹法的他控式变频调速方案，以磁链多边形尽量逼近理想磁通圆为目标，并考虑低速转矩脉动、高速实时性和开关元件的工作频率限制等约束条件，通过采用分段同步控制方式，在不同的频段采用不同的磁链多边形边数，使系统获得了优异的转速精度指标。

E frothing on the round table before him, is to be seen in any circuit of five or six miles among these hills, if you go at the right time after dinner.

有这样一个主人：一个普通的北方农民，一张古板的脸，一双被绑腿马裤衬托得尤为粗壮的腿，那么房子和家具也就没有什么特别之处了，而且在五六英里外的山上，如果你去的时间恰巧是午饭之后的话，你可以看见他坐在他的扶手椅上，一杯冒着泡沫的啤酒放在他前面的圆桌上。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐