然而，在2月底给这个女孩送书时，黄发现曾家里的网络信号很差。
However, Huang found that the network signal was poor at Zeng's home when he took books to the girl at the end of February.
用桔黄烟雾信号以识别。
发桔黄烟雾识别信号。
本文提出采用希尔波特-黄变换（HHT）方法从干扰和噪声中提取微弱的冲击无线电信号。
The Hilbert-Huang Transform(HHT) methods is used to extract the weak impulse radio signal from interferential and noisy environment in this paper.
交通信号灯采用红、黄、绿三种颜色，是因为早期的交通指挥官模仿铁路工程师所设计的用于铁道系统控制火车的编码系统。
Stoplights are red, yellow, and green, because traffic officials, early on copied the code system railroad engineers devised for track systems controlling the trains.
为了体现这一特点，本文将HHT进一步称为希尔·波特-黄变换局瞬信号分析(HHT - LISA)。
For showing this characteristic, this paper further calls the HHT as the Hilbert-Huang transform Local-instantaneous signal analysis (HHT-LISA).
将希尔伯特黄变换应用于水声矢量信号处理之中，提出了矢量希尔伯特黄变换法(矢量hht)。
An application of Hilbert-Huang Transform in underwater acoustic vector signal processing was introduced and a new method of vector Hilbert-Huang Transform (vector HHT) was developed.
阐明在不同黄单胞病菌诱导的水稻过敏性细胞死亡（HCD）中的一氧化氮（NO）信号途径及其作用机制。
The project was conducted to elucidate a key role for nitric oxide (NO) played during rice-Xanthomonas spp interactions by triggering hypersensitive cell death (HCD) and inducing defense genes.
变黄可能是水分过多的现象，也可能是由于水分不足的警告信号。
Yellowing can be a sign of too much water. But it can also be a warning sign of too little water.
为什么交通信号灯采用红、黄、绿色？
太阳能交通警示黄闪灯和太阳能交通信号灯，广泛应用于高速公路、收费站、十字路口、分割岛、桥梁、停车场等各个方面。
Solar energy traffic warning yellow lamp and solar energy traffic single lamp are widely used on super high way, charge station, crossways, zebra line bridge and parking lot and other areas.
深圳市气象台所发布的黄、红、蓝色暴雨信号是历史上次数最多，最频繁之一。
Rain storm warning signals issued by Shenzhen Meteorological Observatory during that time were the most frequent in history.
希尔伯特-黄谱可以将机械振动信号分解为有限的模式，然后以时频方式揭示机械的运行状况；
The Hilbert-Huang spectrum can decompose the mechanical vibration signal as finite modes, then disclose the running status of machinery by the means of time-frequency;
例如，信号塔每年造成2000多只黄秧鸡死亡，这大概是其总数量的百分之九。
For example, tower impacts kill more than 2,000 yellow rails per year. That's roughly 9 percent of the total population.
每一方向都有红、黄、绿组成的交通信号灯。
Each direction has a red, yellow, green, composed of traffic lights.
每一方向都有红、黄、绿组成的交通信号灯。
Each direction has a red, yellow, green, composed of traffic lights.
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