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- Then on the heart sound envelope, S1 and S2 were recognized. 然后利用数学形态学方法提取心音信号的包络;
- So, this paper uses mathematical morphology theory to catch heart sound envelope, and then composes the reference noise which is heavily correlative to the noise in the primary PCG signal. 在这里本文又引入了数学形态学理论,利用它提取了心音信号的包络,然后合成了自适应滤波需要的参考。 这样得到的噪声信号虽然在心音成份部分不能保证与原心音中的噪声相关,但在心音间隙期二者是强相关的,利用这种相关性,在这里滤去间隙期的噪声信号,得到了分界更清晰的心音图,为心音成份的识别打下基础。
- A sound mind is inseparable from a sound body. 健全的精神是与健康的身体是不可分割的。
- Alarmed at the first sound, we hit the dirt. 第一声警报一响我们就迅速卧倒。
- He has told a story which sound not objective. 他讲了听起来不真实的一个故事。
- I caught a curious sound in the neighboring room. 我听到隔壁房间里有奇怪的响声。
- I was awakened by the sound of church bells. 我被教堂的钟声吵醒。
- The sound of danger gives wings to his flight. 危险的信号加速了他的逃跑。
- I quivered with fear at the sound. 我听见那种声音就吓得发抖。
- Her mouth open and shut, but no sound come out. 她的嘴张开又闭上了，没有发出声音。
- I have got accustomed to noisy sound. 我已习惯于嘈杂声音。
- The bell gave forth a peasant, lingering sound. 钟奏起了悠扬悦耳的曲调。
- He was a man with a sound constitution. 他是个体质强健的人。
- They have got home safe and sound. 他们已平安到家。
- I heard a faint sound in the distance. 我听到远处有个微弱的声音。
- The explosion gave forth a tremendous sound. 爆炸发出巨大的声响。
- The sound of the cheering faded away. 欢呼声在逐渐消失。
- She is enamoured of the sound of her own voice. 她陶醉于自己的嗓音。
- The dog's ear pricked up at the sound. 狗听到声音后竖起了耳朵。
- She is enamored of the sound of her own voice. 她陶醉于自己的嗓音。
