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- 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。
- Results Compared with sound velocity and attenuation, the backscatter coefficient could reflect the structural change of biological tissue.The high frequency ul... 结果高频背向散射系数较声速、声衰减更能反映组织结构的变化,高频超声图像具有高的分辨率。
- atmospheric backscatter coefficient 大气后向散射系数
- Because the backscattering coefficient is constant, Amazon tropic rain forest is the important calibration region. 亚马逊热带雨林的后向散射系数呈现大面积的均匀性和稳定性,故成为分布目标定标最主要的定标场。
- By using a signal superposition simulation method, simulations results are presented, which verified the jamming effect evaluation based on jamming equivalent backscatter coefficients measure. 应用信号叠加的方法进行了仿真，验证了基于干扰等效后向散射系数统计特性分析的干扰效果评价方法。
- It is useful to use greater value of detection angle for increasing the backscattering coefficient and ameliorating the ratio of signal to noise. 可以利用大的探测角值提高背散射率以改善信噪比。
- By using the Monte Carlo method, we simulate the backscattering coefficient and the thickness contrast of low loss energy and coaxial backscattered electrons in thin film targets. 摘要用蒙特卡罗方法模拟计算了薄样品中的高能同轴背散射电子的背散射率和厚度衬度。
- GMF modeling using traditional statistical method usually needs a great number of backscattering coefficient measurements under various observing parameter conditions. 采用传统的统计方法建立GMF往往需要大量的、多种参数条件下的雷达后向散射测量数据。
- Keywords ultrasound;backscatter coefficient;cancellous bone;apparent density; 超声;背散射系数;松质骨;表观密度;
- For now, the versions 2.0 of CASINO produce the following signals : Backscattered coefficient and X-Ray.It also handles those geometry : muti-layers samples and grain boundary. 大家都知道，如果用较高能量的电子束去分析薄样品，得到的信号很可能大部分来自衬底而非真正的样品。
- Feasibility Study of Ultrasonic Backscatter Coefficient in Assessment of Cancellous Bone 超声背散射系数评价松质骨状况的可行性研究
- Keywords cancellous bone;parametric imaging;broadband ultrasonic attenuation（BUA）;speed of sound（SOS）;ultrasonic backscatter coefficient（BSC）; 松质骨;参量成像;宽带超声衰减;超声传导速度;超声背散射系数;
- In general, the backscattering coefficients can be calculated from scatter models. 海面雷达后向散射系数是主动微波遥感定量化研究海洋的基础。
- Compensation of backscattering coefficient 背向散射率补偿
- backscatter coefficient 后向散射系数
- Balin.I Serikov.S Bobrovnikov Simultaneous measurement of atmospheric temperature,humidity,and aerosol extinction and backscatter coefficient by a combined vibrational pure-rotational Raman lidar 2004 白宇波.;石广玉
- Water has a variable coefficient of expansion. 水的膨胀系数是可变的。
- Pascal published a treatus on binomial coefficient. 帕斯克发表了关于二项系数的论文。
- Cancel water vapour permeability coefficient. 取消了水蒸气渗透系数。
- Water is variable in coefficient of expansion. 水的膨胀系数是可变的。
