通常情况下线程等待一个由中断服务发出异步信号的信号量。
Usually a thread waits on a semaphore that is signaled asynchronously by an interrupt handler.
注意，条件函数并不是异步信号安全的，因此不能在信号处理函数中调用。
Note that condition functions are not asynchronously signal-safe and should not be called from a signal handler.
信号就是软件中断，可以向正在执行的程序(进程)发送有关异步事件发生的信息。
Signals are software interrupts that send information about an occurrence of an asynchronous event to an executing program, or process.
l利用事件——当异步调用完成时设定的信号。
Using events - a signal is set as soon as the asynchronous call is finished.
事件将异步的“外部动作”与编程上的回调(也称为信号、绑定等等)联系起来。
Events relate asynchronous "externalities" to programmed callbacks (also called signals, bindings, and so on).
RTSJ包含了对异步事件处理的支持，触发异步事件的事件包括大量包含计时器的源代码、操作系统信号、超过时限和其他应用程序定义的事件。
The RTSJ includes support for handling asynchronous events triggered by a number of sources including timers, operating-system signals, missed deadlines, and other application-defined events.
由于信号在本质上是异步的，所以难以找出当信号处理函数触发某个不可重入函数时导致的bug。
Due to the asynchronous nature of signals, it is difficult to point out the bug caused when a signal-handling function triggers a non-reentrant function.
当线程被创建时，请求信号也被创建，支持异步请求。
When a thread is created, a request semaphore is also created that support asynchronous requests.
利用事件-信号是尽快将异步调用完成。
Using events - a signal is set as soon as the asynchronous call is finished.
异步中断是由其他硬件设备产生的，可以在CPU时钟信号的任意时刻到来。
Asynchronous interrupts are generated by other hardware devices at arbitrary times with respect to the CPU clock signals.
原理性地介绍了各模块的实现方法，重点讨论了视频信号的存储、DSP程序的引导装载、异步串行通信接口的扩展等关键性问题。
The implementing of each module is introduced in principle. Some key problems are discussed with emphasis, such as video signal storing, DSP boot loading, asynchronous serial interface extending etc.
利用电压空间矢量脉宽调制(SVPWM)信号变换控制功率变换器各开关器件的导通占空比，实现异步电动机的速度调节。
Using space vector pulse-width modulation (SVPWM) signal transformation method, speed regulation of induction motor is implemented by controlling the duty ratio of every converter switch.
本文介绍了一种利用软件定时器在AT87C51单片机上实现多路信号异步采集的实用技术。
This paper introduces a useful method to realize asynchronous acquisition of multi-channel signals on AT87C51 single-chip microcomputer using software timers.
这种新方法的基础是零序变压器在三相异步电动机断相时输出一个电压信号。
Use is made of that zero-sequence transformer outputs a voltage signal when phase-failure occurs in three-phase induction motor.
这种异步与门与常用的同步型爆炸与门相比，具有对两个输入信号无同步性和无时序要求的特点，扩展了与门的应用范围，提高了正常作用的可靠性。
Compared with synchronous explosive and gate, it requires no synchrony and time sequencing to its two inputs, thus extends its application area and improves its reliability of normal function.
而异步电机是一个多变量、强耦合、非线性的时变参数系统，很难直接通过外加信号准确控制电磁转矩。
But asynchronous machine is a multivariate close coupling non - linear time - variable parameter system. And it is difficult to control by rule and line through adding exterior signal directly.
DSP作为系统核心，使得本系统能直接采集异步串行数字信号。
Because DSP is the core of the system, asynchronous serial signals could be acquired directly.
接着，给接收到的异步蜂窝式通信信号的帧边界加时间标记。
Then a frame boundary of a received asynchronous cellular communication signal is time-tagged.
采用级联型多电平逆变器给异步电机供电，逆变器的开关信号利用载波移相脉宽调制方法生成。
The asynchronous machine is fed by cascaded multilevel inverter, and the inverter switching signals are generated by carrier phaseshifted pulse width modulation method.
本文提出了一种基于数字信号处理器(dsp)的交流异步电动机经济实用的降压节能方案，并介绍了其软硬件的设计与实现方法。
In this paper, we present an economic scheme of decompression energy saving for AC induction motor based on DSP, its software and hardware were analyzed.
本文提出了旨在消除同步采样条件限制的交流信号有功功率测量的异步采样方法。
This paper demonstrates an asynchronous sampling scheme, which can eliminate the restriction of the synchronous sampling requirement, for the measurement of the active power of the ac signal.
通过提前产生求值完成信号，使用DSDCVS逻辑实现可重构单元的运算电路，改进了异步可重构单元的控制电路。
By producing evaluating completion signal early and using DSDCVS logic to design computation circuit of reconfigurable cell, a modified control circuit is proposed.
两个异步单元之间的联接、或是一个信号引入一与之异步的系统时，可能会引起亚稳态而导致故障。
Metastability failure may occur when a connection is needed between two asynchronous units, or a digital signal is sampled by another asynchronous system.
在异步电机转子断条故障检测中，将原信号最优小波包分解，经自适应滤波后再信号重构。
During detection of asynchronous motor rotor-bar broken fault, the signal of current was reconstruct after decomposed by best wavelet packet and adaptive filtered.
本文研究一种基于数字信号处理器（DSP）的三相异步电动机变频调速系统。
The variable frequency variable speed system of three-phase asynchronous motor based on DSP has been researched in this paper.
给出了一种基于数字信号处理器TMS320 LF 2407a的全数字化车用异步电机直接转矩控制系统，并介绍了该控制系统的硬件和软件结构。
A direct torque control system of fully digitized vehicle used asynchronous motor based on DSP TMS320LF2407A is given out, while introducing this system's hardware and software structures.
本文主要研究了一种专门用于交流异步电机控制的数字信号处理器TMS320 LF 2407a，以及它在现代变频调速系统中的应用。
This thesis mainly introduced a new digital signal processor TMS320LF2407A specially used in the asynchronous motor control and its applications in the VVVF system.
本文主要研究了一种专门用于交流异步电机控制的数字信号处理器TMS320 LF 2407a，以及它在现代变频调速系统中的应用。
This thesis mainly introduced a new digital signal processor TMS320LF2407A specially used in the asynchronous motor control and its applications in the VVVF system.
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