Tong uses the model to analyse the effect of a rectangular obstruction in a channel . 董使用“混合”模型研究了管道中有矩形障碍物时所产生的影响。
A series of parallel strips of rectangular section is cemented over a lower sheet . 使用一组截面为矩形的互相平行的试条，并将它们粘贴在一薄片上。
If a rectangle can be covered using these tiles then covering uses an even number of tiles . 如果一个矩形可用这种瓷砖盖住，那么所有的瓷砖一定是偶数。
It is easily seen that electrical networks can be used to obtain tilings of rectangles of prescribed shapes . 显而易见，电网络可以用来获得将矩形划分成具有指定形状的矩形的划分法。
If a rectangle can be tiled with squares then the ratio of two neighboring sides of the rectangle is rational . 如果一个矩形可以划分成一些正方形，则该矩形的两条邻边之比是有理数。
They may range from the single cell or multicell box with rectangular sides to a similar trapezoical type with sloping sides . 它们包括有单箱和多箱，有矩形和有斜向腹板类似梯形的类型。
The signal thus received will no longer look like a square wave but will be distorted in shape and spread out in time . 这样收到的信号看起来不再象矩形波，而是受到畸变，并且持续时间延长了。
Braces are used for the column matrices to distinguish them from rectangular matrices usually put in square brackets . 大括号用于列矩阵，以便使列矩阵与矩形矩阵区分开，矩形矩阵通常采用方括号。
Areal patterns may be rectangular or along concentric circles, depending on the nature of the noise and on the space available for the array . 面积组合可以是矩形的，或者沿着同心圆周布置，这取决于噪音的性质以及允许的组合间距。
If a standard rectangular window should be used ；如果应使用标准矩形窗口，则为
