中心线

According to the position feature of drilled crops that were regularly sown as a constant row space, the pixel-histogram method was used to determine the central line and the width of crop row. As a result, weeds between crop rows were detected.

根据条播作物小麦作物行的间距相对固定等位置特征，利用植物像素直方图法确定作物行的中心线和行宽，并识别行间杂草。

Firstly, the row crop and background were segmented by the excess green value. Secondly, the image strips were divided by crop image horizontally and the position was calculated by detecting the peak on the curve resulting from vertical projection of strips. Finally, the crop rows center lines were accomplished by robust regression.

对作物图像运用过绿特征值分割作物和背景，将得到过绿特征图像划分为若干水平图像条，对图像条过绿特征值进行垂直投影，求取投影曲线上突出峰点的位置；利用稳健回归法对位置点进行线性拟合得到作物的行中心线。

Piston check valve flap Rubber Flapper Swing Check Valves, Oil Control Bottom Buffer along the vertical center line of sliding valve check valve, check valve with internal thread can only be installed in horizontal pipes, in the high-pressure small-bore ball valve on the valve flap can be used.

活塞式止回阀瓣沿着阀体垂直中心线滑动的止回阀，内螺纹止回阀只能安装在水平管道上，在高压小口径止回阀上阀瓣可采用圆球。

Despite a rather chaotic history, city planning remained true to the Ming dynasty blueprint, which was rooted in a traditional linear layout of a single straight line running north and south through the city's center.

尽管有着曲折的历史，城市规划还是遗传了明代的设计蓝图，即传统地从城市中心从南到北直线性分布，并依照中心线有系统地分布了六条环线。

Methods: In control group, the studied model was X-rayed with the central mark of scale penetrated vertically by the centerline of X-ray-tube and both ends of the scale included in the radiation field.

对照组：X线球管中心线对模型1标尺的中点标记进行垂直摄影，照射野包含标尺的两侧标记，摄影距离120cm，物－台距离3.5cm。

Proper Schipperke movement is a smooth, well coordinated and graceful trot (basically double tracking at a moderate speed), with a tendency to gradually converge toward the center of balance beneath the dog as speed increases.

舒柏奇犬正确的动作应该是平顺、非常整齐而优美的小跑（基本上，在中等速度下，是双重轨迹），在速度增加时，为了保持平衡，足爪趋向于向身躯中心线收拢。

Graying due to age or occasional white hairs should not be penalized. Gait nProper Schipperke movement is a smooth, well coordinated and graceful trot (basically double tracking at a moderate speed), with a tendency to gradually converge toward the center of balance beneath the dog as speed increases.

由于年老而出现灰色（7岁或更大），及偶尔出现白色被毛，不属于缺陷。nn n舒柏奇犬正确的动作应该是平顺、非常整齐而优美的小跑（基本上，在中等速度下，是双重轨迹），在速度增加时，为了保持平衡，足爪趋向于向身躯中心线收拢。

I recommend that you break the service box into three zones-the area close to the center line, the portion in the middle of the box, and the part near the alley-and practice aiming for these areas.

我建议你将发球区分为3个区域---靠近中心线的区域、发球区中间的区域和靠近后场的区域---练习瞄准。

On the ship center line of the dock, a laser equipment (this laser equipment only can turn in same vertical face)is put on someplace between the Fr –3# and the Fr 7.5#.

在船坞底船体中心线上，-3#肋位与艉轴管后端面所在肋位之间某处放一激光仪（此激光仪只能在同一重垂面内转动），然后分别用激光打-3#肋位及艉轴管后端面两处的钢丝心，确定这两点在船中心面的内，及已确定了整根轴线在同一中心面上。

The sinuosity or sinuosity ratio of a stream is expressed as the ratio of the length along the center line of the stream to the length along the valley.

一条河流的弯曲率或弯曲比，是以沿该河中心线与沿其河谷长度之比来表示的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。