natural weight造句

• Considering the nonuniqueness and instability of ultrasonic computerized tomography for structural concrete as well as the ultrasonic transmission characteristics in concrete , a natural weight matrix with dear physical meaning was introduced in the inverse algorithm
  摘要针对混凝土超声波层析成像结果不唯一和稳定性差的问题，首先依据超声波在混凝土中的传播特点，在反演算法中引入物理意义明确的自然权矩阵，对走时较小的射线和射线较密的成像单元加以重权。
• Different algorithms were compared in the numerical simulation and model experiment of concrete velocity inversion the results showed that , compared with the least - square solutions and the damped least - square solutions , the damped and natural weighted least - square solutions reflected the inner defections of the tested object more reliably and exactly due to the usage of correct priori information , which benefited the suppression of noises and made the iterations of inverse stable and convergent
  结果表明，相对于最小二乘法和阻尼最小二乘法，基于自然权的加权阻尼最小二乘算法，由于利用了正确的先验信息，不但使反演过程收敛，而且具有数值稳定、抗噪能力强的优点，其成像结果能真实有效地反映对象内部缺陷，因此更适用于混凝土的超声波速度反演。
• Compared with straight ray tracing , inversion of bending ray tracing is better when data of test are accurate . on the other hand , natural weight is introduced and numerical simulations and experiments of wlm on inversion of velocity and attenuation are also made , which show that wlm , with resistance of noises and convergence of iteration , may get good re - construction images
  本文引入了物理意义明确的自然权，对基于自然权的加权阻尼最小二乘反演算法( wlm )在速度反演、衰减反演中进行了数值模拟和试验研究，结果表明wlm均能获得良好的重建图像，迭代收敛，抗噪能力强。