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- The ultrasonic backscattering of waxy crude oil was measured in laboratory and processed by wavelet transform for bettering the signal/noise ratio. 在实验室条件下对一种含蜡原油的声背散射进行了测量，用小波变换技术降低信号噪声，提高了信噪比。
- Abstract: The spectral centroid shift （SCS） of ultrasonic backscattering signals is introduced to assess cancellous bones. 文章摘要: 采用超声背散射信号的质心偏移量来评价松质骨。
- Then the feasibility of ultrasonic backscattering coe-fficient imaging method is discussed.And an outlook on the further research work is presented. 然后对基于背散射法的超声背散射系数成像方法的可行性进行了分析和讨论,最后对进一步的研究工作进行了展望。
- ultrasonic backscattering spectrum 超声背(反)向散射谱
- At last, the recent development of ultrasonic backscatter imaging is reviewed. 最后，简要介绍了超声背向散射成像的新进展。
- According to the size of SCS of ultrasonic backscattered signals, the status of cancellous bone may be assessed. 根据超声背散射信号质心偏移量的大小，可用于评价松质骨健康状况。
- The relationship of ultrasonic backscatter coefficient (BSC) in cancellous bone with frequency is analyzed in theoretical and experimental. 在理论和实验上,分析了松质骨中超声背散射系数与频率的关系。
- Methods:Myocardial ultrasonic backscatter parameters of 59 hypertensive heart diseases and 60 persons of normal control were measured in this study. 方法:测定59例高血压心脏病患者及60例正常对照者的超声背向散射参数。
- Conclusions Ultrasonic backscatter parameters are useful in determination of the degree of myocardium injury of hypertension patients. 结论 心肌超声背向散射参数可用于判断高血压病心肌病变的程度。
- Ultrasonic backscattered grain echoes are random signals which bear information related to the attenuation properties of the materials. 材料中颗粒(或微结构的不连续)造成的超声背散射信号是一种随机信号,这种信号的衰减特性与材料中微结构状态有关。
- Ultrasonic Backscattering from a Laplacian Distributed Rough Surface 拉普拉斯分布表面超声背向散射的研究
- The Autoregression (AR) cepstrum is put forward to estimate the mean spacing of trabecular bones in cancellous bone based on ultrasonic backscatter signal. 对牛胫骨和人离体跟骨松质骨中的超声背散射信号采用AR倒谱法进行了分析,并估计了牛胫骨和人离体跟骨中骨小梁的平均间距。
- The doctors gave him an ultrasonic brain scan. 医生给他做了脑部超声波扫描检查。
- Methods:Myocardial ultrasonic backscatter parameters of 37 hypertension(HT)patients,15 hypertrophic cardiomyopathy (HCM) patients with hypertrophic interventricular septum and 40 normal were measured. 方法：本研究测定了37例高血压病患者、15例肥厚部位为室间隔的肥厚型心肌病患者及40例正常对照者的心肌超声背向散射参数。
- Analysis of Ultrasonic Backscattering Microstructure Feature of Human Spleen Based on"WD Cepstrum" 基于“WD倒谱”法分析人体脾组织的超声散射微结构特征
- Keywords multiresolution analysis;biological tissue;scatterer spacing;ultrasonic backscattering; 关键词多分辨率分析;生物组织;散射元间距;超声背向散射;
- ultrasonic backscattering 超声背(反)向散射
- Set up an ultrasonic wire bonding laboratory. 成立超声波电子焊接实验室.
- The acoustics of ultrasonic sound. 超音频声音的音响学
- Rinse with warm water in an ultrasonic bath. 在超声波池内进行温水冲洗。
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海词词典，十七年品牌
