结果：零信号点的恢复时间。
目的：研究核磁共振成像反转恢复技术中零信号点。
Objective: To study the zero signal point in the MRI inversion recovery technology.
由分析可见：利用实际电路控制信号之间的逻辑关系获得过零信号简洁、可靠。
Indirect detecting is achieved by using the logic relationship between control signals, which is simple and reliable.
方法：从理论上对核磁共振成像反转恢复技术进行系统研究，获得零信号点的数学表达式。
Methods: Using the MRI inversion recovery technology systemically in theory and get the mathematical expression of the zero signal point.
为了消除零信号的影响，文章提出了采用多次判定检测法，降低由零信号的现象所造成的误判概率。
To eliminate the effect of zero signals, a multi-decision method is proposed to reduce the probability of misjudgment caused by the existence of zero signals.
这种器件最有效地使用于调零和光束置中应用，目标通过保持平衡或调零信号来维护或监测光学器件的对准。
These devices are most effectively used in nulling and beam centering applications where the goal is to maintain or monitor optical alignment by keeping a balanced or null signal.
实验和模拟结果均表明：采用简化方案时转换输出的伪归零信号所包含的时钟分量的强度小于采用抽运探测方案的情况。
Both of them shows that the clock component contained in the converted PRZ signal obtained using the simplified scheme is weaker than that using the pump-probe scheme.
如果出了什么问题——比如，一只饥饿的蜥蜴在四处寻找蚂蚁作为零食——那么一群没有食物的蚂蚁就会匆匆归来，给等待的蚂蚁发出“不要出去”的信号。
If something goes wrong—a hungry lizard prowling around for an ant snack, for instance—then a rush of ants returning without food sends waiting reserves a "Don't go out" signal.
Linux使用pthread_condition_init调用在当前进程内创建信号对象，在其中维持一个在零与最大值之间的计数值。
Linux USES the pthread_condition_init call to create a semaphore object within the current process that maintains a count between zero and a maximum value.
这是必须的，因为没有来自下游工序的信号上游工序决不会生产零部件。
This is needed, because the upstream process never produces parts without instruction from the downstream process.
库存增长是积极信号，表明批发商增加制造商的订单，预计零售商会增加商品采购来销售给顾客。
Growth in inventories is a positive sign because it means wholesalers are increasing orders from manufacturers and expecting retailers to also start buying more goods to sell to consumers.
如果信号的值从零开始增加，而且pthread_cond中有任何线程被阻塞，那么请等待这个信号，因为其中一个会被唤醒。
If the semaphore value is incremented from zero and there is any threads blocked in the pthread_cond, wait for the semaphore because one of them is awakened.
LinuxPOSIX信号使用sem_wait来挂起发出调用的线程，直到信号拥有了非零的计数值。
Linux POSIX semaphores use sem_wait to suspend the calling thread until the semaphore has a non-zero count.
如果不进行“调零”修正，所产生的偏置量就会叠加到输入信号上产生误差。
Unless it's corrected by "zeroing," the resulting offset produces an error by adding to the input signal.
当计数值成为零时，信号对象的状态成为non - signaled。
When the count reaches zero, the state of the semaphore object becomes non-signaled.
充电器应发出警报信号后没有任何一方发起一个欠压继电器或零充电电流继电器。
The charger shall give an alarm signal upon failure initiated by either an under-voltage relay or a zero charging current relay.
本文针对有载波偏移的零中频bps K调制信号提出了一种软件解调系统。
The paper presented a software demodulating system of BPSK zero-IF signal containing carrier offset.
所谓重力异常线性构造信号就是重力异常水平总梯度沿重力方向的一阶导数且是大于零值的那一部分。
So-called gravity anomaly linear structure signal is derivative of gravity anomaly level total gradient on gravity direction, and the derivatives must be greater than zero.
因为陀螺是一种积分装置，所以信号发生器的零位灵敏度影响测量精度和测量分辨度。
The signal generator null sensitivity affects the accuracy and resolution of measurement because the gyro is an integrating device.
假定图象信号的数学期望为零，证明了相关器输出的基本性质。
Suppose the mathematical expectation of image signal is zero, the basic properties of the correlator output are given.
采用霍尔传感器US5881来提供检测锯片的零度线信号。
We use a HALL-IC, US5881 to provide the zero-line signal of the saw-blade.
通常是设计一个逆滤波器，然后与信号进行褶积，目的是使以前的滤波器对信号的影响变为零。
Usually an inverse filter is designed and convolved with the signal, the objective being to nullify an objectionable effect of an earlier filter action.
在信号处理过程中采用了交流相位跟踪零差补偿技术(PTAC)。
An alternating current phase tracking (PTAC) homodyne scheme has been used to process output signal of the Michelson interferometer.
高可靠高速度的零位参考信号。
它是采用空间滤波技术，通过辅助通道在干扰方向上形成波束图的零点来实现对干扰信号的抑制。
Beam pattern null in the direction of the jamming is formed by a space filtering and assisted receive channels to suppress the jamming.
它采用空间滤波技术，通过辅助接收通道在干扰方向形成波束图的零点，实现对干扰信号的抑制。
Beam pattern null in the direction of jamming is formed by space filtering and assisted receive channels to suppress the jamming.
交流(ac)信号产生的电弧通常在电压通过零点时就会自己熄灭。
An arc due to an AC signal usually quenches itself as soon as the voltage level passes through zero.
相反，如果一个信号量的数值为0(或小于零)，进程就必须一直等待直到其他进程释放了这个信号量。
If, instead, the semaphore's value is 0 (or less), the process must wait until somebody else releases the semaphore.
提出一种新的信号分析方法，即信号的过零率分析法，并对其进行了论证。
The method is suitable to analyze and identify the target signals of acoustic fuzes .
其中频谱的非零频率信息可提取噪声能量，频谱的零频率信息可提取信号能量。
Then, noise energy can be abstracted from the nonzero frequency information of the spectrum, and signal energy from zero frequency information.
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