业务层还控制着可变速度标识，车道结束标志和许多可变信息标志。
The operational layer controls also variable speed signs, lane closing symbols and variable message signs.
由此，匝道调节率与可变速度限制间高效的联合控制对于提高道路性能显得尤为重要。
Therefore, an effective combination of ramp metering and variable speed limit control is important to achieve a good performance.
阐述了神经网络学习算法，设计了高速公路可变速度标志神经网络控制器，并对控制器进行了仿真研究。
The neural network algorithm is formulated and the controller is designed. Simulation research is carried out by taking full advantage of a computer.
针对高速公路可变速度控制是一个非线性时变系统，难于用数学模型准确建模这一特点，提出了神经网络控制方法。
The variable speed control for freeway traffic is a nonlinear and time variable system, it is difficult to model with a mathematical model. A neural network control method is put forward.
我们考虑在压机上安装一个可变速的驱动装置，这样我们就可以冲压铝件时降低速度，冲压钢件时恢复原来的速度。
"We looked into installing a variable speed drive on the press," explains Yager, "so we could stamp the aluminum at the slower speed and the steel at the original speed."
模拟固定速度和数字式可变速。
在一个实施例中，无级变速器产生总是低于输入速度的可变的输出速度。
In one embodiment, a CVT produces a variable output speed that is always lower than an input speed.
所公开的是一种无级变速器，其构造成可产生总是大于输入速度的可变的输出速度。
Disclosed is a CVT configured to produce a variable output speed that is always greater than an input speed.
在制冷系统控制器确定为低负荷情况时，可变速驱动控制器以运转的较低速度模式操作压缩机马达。
When a low load situation has been determined by the refrigerant system controls, the variable speed drive operates the compressor motor at lower speed mode of operation.
在制冷系统控制器确定为低负荷情况时，可变速驱动控制器以运转的较低速度模式操作压缩机马达。
When a low load situation has been determined by the refrigerant system controls, the variable speed drive operates the compressor motor at lower speed mode of operation.
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