According to the correlation of TV image, the structure and characteristic of three dimensional spectrum in PAL TV signals is mathematically analyzed.

根据电视图像的相关特性，对PAL信号的三维谱结构及其特征进行了数学分析。

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Objective:To establish the heart sound database and the colored three dimensional spectrum database of normal persons and patients with heart disease.

目的：建立我国正常人和各类心脏病患者的心音数据库及心音彩色三维图谱库。

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After the simulation of the well surrounded by two and three stratums, the two-dimensional spectrum is calculated while the curve of wave slowness changes with the frequency is drawn.

分别计算了井外有两层、三层介质时井内声波传播的二维谱，绘制了时差随频率的变化曲线。

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Two-dimensional tracking would be managed via the existing Move's visual spectrum camera, or by using a display-mounted IR emitter in conjunction with a remote mounted sensor (again, just like the Wii controller).

ENGADGET: Sony patent application reimagines PlayStation Move with ultrasonic capabilities, IR emitters