In addition , in order to make the acquisition of wave data , image processing method and the threshold approach are given to resolve data sampling and detect r wave 另外,在心电信号采样过程中采用了图像处理的方法,实现了一定频率的数据采样;并且利用阈值法对r波进行准确定位,从而保证了波形数据的准确性和可靠性。
Thirdly , through assaying the error generated during measuring data , the result manifests : 1 ) the location installed of the transducer and the point thumped affects the experiment result to some extent . if surface - opening cracks is deeper , the location of the transducers installed and the point thumped should be further away from the location of surface - opening cracks . 2 ) when the depth of surface - opening cracks is near to 50mm , it is very difficult to measure the depth of surface - opening cracks because the depth of r _ wave conveying in concrete plates from the different small ball bringing forth exceeds 50mm . 3 ) it is clear from the experiment result , the influence is n ' t big for the diameters of small balls to measure the data while the time interval between two transducers touched firstly has very big influence on the result 其次,对测量数据进行了误差分析,结果表明: ( 1 )传感器及敲击点的位置对实验结果有一定的影响,当开口裂纹的深度较深时,传感器和敲击点的位置应该离裂纹较远; ( 2 )当开口裂纹深度接近50毫米时,由于实验中所使用的小球产生的r波传播深度均超过50毫米,故很难测量出其开口裂纹的深度; ( 3 )实验发现,小钢球直径的大小对裂纹深度的测量结果影响并不是很大,但是,波的开始上升和下降点的测量精度(即两信号的时间延迟) ,对测量的结果有很大的影响。
r: r = 1.refrigerator. 2. ...波: wave第二个r波: secondary r wave随后的r波: succeeding r wavep波,q波,r波,t波,u波,心电图s波: part of ecg wave迟发的大r波: large late r wave心电图阴性r波: negative r waves波: s wave; s-wave; shake wavet波: t-wave波: Ⅰ名词1.(波浪) wave 微波 ripples2.[物理学] (振动传播的过程) wave 声波 sound wave; 短波 short wave; 纵波 longitudinal wave; 横波 transverse wave3.(意外变化) an unexpected turn of events; unexpected changes 风波 storm; crisis; disturbance; 一波未平, 一波又起。 hardly has one wave subsided when another rises.4.(姓氏) a surname 波才 bo caiⅡ动词[方言] (跑) run 倒置t波,负性t波: negative t waveb波: b wavedelta波: delta wavehem波: hem waveh波: bydrodynamic wave; h wave; hydrodynamic wavelg波: lg wavem波: m-wavep波: p wave; p-waveqrs波: part of electrocardiographic wave; qrs waveq波: q wave; q-wave; q-zacke; qwtm波: transverse magnetic field waveu波: u wave; u-wave; uwv波: v wave; v-waveα-波: alpha-wave波 常辉: tsu-ne