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The bias of cyclic periodogram with ssinc window is analyzed in both spectrum frequency direction and cycle frequency direction, and that the TA cyclic spectrum estimation is unbiased is proved.

通过分析加ssinc窗的循环周期图在谱频率方向和循环频率方向的偏差，分析了TA循环谱估计是无偏估计。

The bias of cyclic periodogram with ssinc window is analyzed in both spectrum frequency direction and cycle frequency direction, and that the TA cyclic spectrum estimation is unbiased is analyzed. The average method of cyclic periodogram is also derived in terms of STFT.

论文中通过分析加ssinc窗的循环周期图在谱频率方向和循环频率方向的偏差，表明TA循环谱估计是无偏估计，并根据STFT方法，推导了使方差得以减小的平均循环周期图方法。

The PZT plates were polarized in thickness direction. By using the deformation in the plane perpendicular to the direction of polarization, the rotation around Z axis was generated when the torsional vibration around Z axis mode was excited. And the rotation around X axis or Y axis was generated by combining the longitudinal vibration mode and the bending vibtration mode.

利用压电陶瓷在垂直极化方向平面内的变形，激励定子绕Z轴的扭转振动模态，实现转子绕Z轴的转动；激励在定子中固有频率接近、振动方向相垂直的伸缩振动模态和弯曲振动模态，并通过振动的叠加使定子末端质点产生绕X轴或者Y轴的椭圆运动，实现转子绕水平轴的转动。

Preformed malleable dental crowns with a side-generic external shape with a plane of symmetry in the facial-lingual direction and/or a plane of symmetry in the mesial-distal direction.

具有在颊舌方向上的对称面和/或近远中方向上的对称面的侧面通用外形的预制的可煅的牙冠。

Fascial plexus also think there is a direction, the direction of the flap design has great significance.

还认为筋膜血管丛有方向性，其方向性对皮瓣的设计有很大意义。

Set kalman that this text set up strain wave assimilate system one horizontal plane net, at the vertical direction the analyticl system P for longitude and latitude, Arakawa A of lattice point, the dimension in the horizontal and vertical direction is adjustable.

本文建立的集合卡尔曼滤波同化系统是一个水平面上为Arakawa A格点的经纬度网格、垂直方向上为P面的分析系统，且水平和垂直方向上的维数均可调。。

We also find that the metal-to-semiconductor transition can be driven by squashing the armchair nanotube along any direction. In case one starts with squashing the tube along a direction that preserves the mirror symmetry, all that needs to be done is to squash the tube to a larger extent, to a point where spontaneous symmetry breaking occurs.

我们并且发现沿任何方向压缩 armchair 碳纳米管都能够使其发生金属-半导体转变，即使我们在开始压缩碳纳米管时保持了其镜像对称性，我们所需要做的只是更大程度的压缩碳纳米管，直到出现镜像对称性的自发破缺。

The wave is allowed to propagate along the symmetric principal direction as well as along off-principal-axis direction.

波既可以沿平行于主轴的方向传播，也可以沿偏离主轴的方向传播。

The in_ cavity residual stress in first principal direction result shows the forces left in the part after ejection in the orientation direction.

第一方向残余应力？品顶出时在配向方向上的残余在产品中的力。

The relationship between the optimal direction of roadway axis and the direction of the maximum principal stress is analyzed in this type of geostress field.

分析了在该类型的地应力场中，最优巷道布置方向与最大主应力方向的关系。

I'm not an actor. I'm a professor of paleontology.

我不是演员，我是古生物学教授

Spider Network Web site that is a very image of the name.

网络蜘蛛即Web Spider，是一个非常形象的名字。