就好像我们无法控制投出去硬币的正反面一样，即使我们的日子在很长一段连续的时间里都很棒，我们也无法保证接下来的一天也会是个好日子。
The flip side of the coin is that if you’re having many good days in a row this is no guarantee that you’ll have a good day next.
电机驱动部分采用的是专门的驱动芯片来实现正反转控制。
The motor drive part is used in specialized drive chip to achieve positive control.
采用正反向混合推理控制策略及确定性理论来处理知识的不确定性问题。
The uncertainty problem of knowledge is solved by using the forward-backward inference control strategy and the certainty theory.
根据系统改造设计中所需的领域知识，建立了相应的专家系统知识库及表达形式，设计出正反混合推理的控制策略。
The correspond to oil field experience expert system knowledge base and expression have been established, positive and negative mixed inference control strategies have been designed in this system.
无传感器闭环控制模块包括换向调节、电流环调节和速度环调节、正反转速控制等功能。
Sensorless DC motor close-loop control module include reversing control, current loop regulating, the positive and negative rotational speed controls with speed ring etc.
控制算法的运算，正反组晶闸管切换逻辑及高性能的数字触发器均由单片机实现。
The calculation of control algorithm, logic control of positive and reverse group thyristor and advanced digital trigger are accomplished by the single chip computer.
焊接滚轮架的启动、停止、正反转及调速，均在控制平台上操作。
The start, stop, positive inversion and speed regulation of the welding roller frame are operated on the control platform.
通过正反交试验表明，大豆叶绿素缺失突变属于核基因隐性突变，而且是由一隐性单基因所控制的。
The experiments of cross and back cross showed that these mutations were belonged to recessive mutation of nucleus gene and controlled by a recessive monogene.
舞台可正反旋转，由红外遥控控制！
第二，新闻控制的作用和意义要从正反两方面予以评价。
Second, the function and significance of news control must be evaluated from the pros and cons.
控制系统可按所使用的反馈类型即正反馈和负反馈来区别。
They include positive and negative feedbacks by their type of feedback.
由缓冲寄存器、环形分配器、控制逻辑及正反转控制门组成的步进电机控制器则用计算机软件替代。
The step motor controller composed of buffer register, the circular allotter, the control logic, the positive run and back run control circuits is replaced by computer software.
采用电脑数字控制系统，针距、珠点、半针按钮，自动正反点、倒缝、花样线迹设定，一屏操作，轻松方便。
Adopt digital computerized control system, needle stitch , stitch length, Automatically positive and negative points, backstitch , stitch pattern setting , one screen operation, easy to operate.
在系统中，用计算机软件替代了由缓冲寄存器、环形分配器、控制逻辑及正反转控制门组成的步进电机控制器。
In this system, computer software was used to replace stepping motor controller which consisted of buffer, annular allotter, control logic and control doors of clockwise and counterclockwise running.
采用滚筒式结构，正反转自动控制，达到最佳洗涤效果。
The use of a roller structure, positive automatic control, to achieve the best wash results.
电路部分通过机器运作时触碰行程控制开关来实现电机的正反转。
The circuit potion achieves the positive inversion of the motor through touching a stroke control switch when the drinking bottle shredder is running.
这种控制方法虽然是有效的，但是它容易导致系统正反馈。
This control scheme is effective, but it may introduce positive feedback.
控制模块对转向器输入端正反转，液压缸的向前、向后加载，内泄油杯放油等数字量控制。
The hydraulic motor, hydraulic cylinder and oil cup are controlled digitally in the control module.
基于H型双极模式P WM控制原理，设计了一种直流微电机正反转调速功率放大电路。
A power amplification of H-bridge bipolar PWM control is designed for controlling DC micro-motor of positive rotation, reverse rotation and speed regulation.
比较了应变率负反馈和应变正反馈控制律的控制效果。
And the effects under the control laws of negative strain rate feedback and positive strain feedback are compared.
提出了“局部激励应变补偿”和把通常的微分负反馈改为低截止频率的惯性环节正反馈的控制新方案。
A new control approach is presented with a "local strain compensation" and a low cutoff frequency inertial link feedback in place of the differential one.
在系统实现中，采用基于关系型数据库和C -F模型进行知识库的设计，用正反向混合推理控制策略进行不确定性推理。
In implementing of the system, database technique and C-F model are combined to design knowledge base. The uncertainty problem is solved by using the forward-backward inference control strategy.
由缓冲寄存器、环形分配器、控制逻辑及正反转控制门组成的步进电机控制器则用计算机软件替代。
Buffer register, circular allotter, control logic, positive run and back run control circuits are replaced by computer software.
本文采用正反向混合推理机制，深度优先的控制策略建立了一个基于知识的汽车传动系故障计算机辅助系统。
This paper has set up a computer aided diagnostic expert system for automotive drive line by way of forward and backward combined reasoning and depth optimal theory.
该系统采用ATMEL公司的89s52单片机发出脉冲来控制直线步进电机的正反转。
And it can realize the positive inversion of linear stepping motor by sending pulses using 89s52 MCU which is produced by company ATMEL as well.
说明：使用TI公司的MSP430G2553控制步进电机实现正反转。
但由于系统中采用对称阀控制非对称缸而造成整个系统的不匹配，导致系统正反两个方向的动态性能不对称。
But this system is not a matching system, so it lead to the asymmetry of positive and negative dynamic characteristics.
设计了脉冲控制器，实现了正反相同步间的动态切换。
The impulsive controller is designed to switch the in-phase synchronization state and the anti-phase synchronization state.
针对我国城市道路交通信号控制中的灯色规定和一些常用信号正反两方面的影响因素等进行分析。
Aiming at the practice of traffic signal control in China, this paper analyzes the positive and negative effect of the commonly used traffic signal control designs.
调试结果表明，控制系统可实现电机启动、调速、正反转和电流闭环控制。
The test results show that the control system can realize starting, speed adjustment, clockwise and anti-clockwise running and current closed-loop control functions of motor.
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