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   zero pole distribution 的翻译结果: 查询用时:0.168秒
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zero pole distribution
相关语句
  零极点模型
     Clinical application of zero pole distribution of audio Doppler of umbilical artery to evaluate placenta function
     脐血流音频多普勒信号零极点模型评价胎盘功能的临床应用
短句来源
     Methods Audio Doppler of umbilical artery was analyzed by zero pole distribution of 30 normal pregnant women and 19 abnormal pregnant women,and compared with the resistance index(RI).
     方法 对 3 0例正常与 19例异常妊娠妇女进行彩色多普勒超声检查 ,测定脐血流音频多普勒信号和血流阻力指数 (RI) ,并运用零极点模型分析脐血流音频多普勒信号参数分布规律 ,比较两种方法对异常妊娠的检出率。
短句来源
     Results The method of zero pole distribution was better than RI in assessment of abnormal pregnancy(P< 0.05 ).
     结果 以零极点模型获得的参数 (d、e)对异常妊娠的检出率较RI高 (P <0 .0 5 )。
短句来源
     Conclusion The zero pole distribution of audio Doppler in umbilical artery is a new and sensitive method to evaluate placenta function.
     结论 脐血流音频多普勒零极点模型是一种评价胎盘功能的新方法。
短句来源
  相似匹配句对
     Research Into Methodologies of Zero-pole Configure
     对极点配置方法的探讨
短句来源
     The Arctic pole, 35℃ below zero.
     北极。 摄氏零下35度。
短句来源
     SUSPECT ZERO
     [零号嫌疑犯]
短句来源
     DOUBLE ZERO
     [双龙间谍]
短句来源
     The results show that the revolution of the regulator depends on the zero-pole distribution property of the NTF.
     仿真结果表明 ,调制器的分辨率主要由噪声传递函数NTF的零极点分布特性决定 ,本文提出的设计方法是可行的。
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In 1985 Roddcn et al considered the coupling of rigid motion and elastic vibration. But their mathematical model appears to be inconvenient in engineering design. In this paper. the authors present a simplified mathematical model,which allows the authors to study the effect of sensor position on stability of elastic vehicle.Appropriate sensor's position along longitudinal axis. Analyaing zero-pole distribution. the authors can obtain rather optimal sensor position. Taking SAM-1 missile as example,we...

In 1985 Roddcn et al considered the coupling of rigid motion and elastic vibration. But their mathematical model appears to be inconvenient in engineering design. In this paper. the authors present a simplified mathematical model,which allows the authors to study the effect of sensor position on stability of elastic vehicle.Appropriate sensor's position along longitudinal axis. Analyaing zero-pole distribution. the authors can obtain rather optimal sensor position. Taking SAM-1 missile as example,we calculate the appropriate distance of sensor from nose to be 5.45m. This calculated position agrees fully with the actual distance found in SAM-1 missile.In general, the authors believe that the following design suggestions can be made:(1)Normal type of flight vehicle. The group of sensors should be placed behind valley of first order vibration mode and ahead of those of 2nd and 3rd order vibration modes. In the SAM-1 numerical example mentioned above, the distance of 5.45m from nose to sensor farees with this design suggestion.(2) canard type of night vehicle. The suggestion for normal type nceds to be reversed in the case of canard type, i.e., the group of sensors should be placed ahead of valley of first order vibration mode and behind those of 2nd and 3rd order vibration modes.(3) Rotory wing type of flight vehicle. When actuator position is ahead of c.g., of flight vehicle, the suggestion for normal typeof flight vehicle should be followed; when it is behind c.g., the suggestion for canard type should be followed.

研究了弹性飞行器建模问题,分析了敏感元件位置对飞行器纵向稳定性的影响,提出了几类飞行器自动驾驶仪敏感元件合适位置的选择准则.最后通过算例得到的陀螺位置与飞行器实际陀螺位置较好地符合.

Objective To evaluate the value of zero pole distributioin of audio Doppler in umbilical artery when monitoring placenta function.Methods Audio Doppler of umbilical artery was analyzed by zero pole distribution of 30 normal pregnant women and 19 abnormal pregnant women,and compared with the resistance index(RI).Results The method of zero pole distribution was better than RI in assessment of abnormal pregnancy(P< 0.05 ).Conclusion The zero pole distribution of audio Doppler in umbilical...

Objective To evaluate the value of zero pole distributioin of audio Doppler in umbilical artery when monitoring placenta function.Methods Audio Doppler of umbilical artery was analyzed by zero pole distribution of 30 normal pregnant women and 19 abnormal pregnant women,and compared with the resistance index(RI).Results The method of zero pole distribution was better than RI in assessment of abnormal pregnancy(P< 0.05 ).Conclusion The zero pole distribution of audio Doppler in umbilical artery is a new and sensitive method to evaluate placenta function.

目的 运用脐血流音频多普勒信号零极点模型评价胎盘功能。方法 对 3 0例正常与 19例异常妊娠妇女进行彩色多普勒超声检查 ,测定脐血流音频多普勒信号和血流阻力指数 (RI) ,并运用零极点模型分析脐血流音频多普勒信号参数分布规律 ,比较两种方法对异常妊娠的检出率。结果 以零极点模型获得的参数 (d、e)对异常妊娠的检出率较RI高 (P <0 .0 5 )。结论 脐血流音频多普勒零极点模型是一种评价胎盘功能的新方法。

When the number of the integrator in a Sigma-Delta regulator's forward path is L, the regulator is called L-step Sigma-Delta regulator. Based on the linear model of the regulator given in the paper, the design of the regulator is attributed to the design of a linear filter net and a nonlinear quantifier with the consideration of input noises. In this way, the system stability is ensured, and the quantified noise in the basic frequency band is also decreased to minimum. The optimized quantified noise shape is...

When the number of the integrator in a Sigma-Delta regulator's forward path is L, the regulator is called L-step Sigma-Delta regulator. Based on the linear model of the regulator given in the paper, the design of the regulator is attributed to the design of a linear filter net and a nonlinear quantifier with the consideration of input noises. In this way, the system stability is ensured, and the quantified noise in the basic frequency band is also decreased to minimum. The optimized quantified noise shape is obtained and the white noise is put into high frequency band. Furthermore, the noise transfer function (NTF) is designed and optimized. Finally,a 5-step Sigma-Delta regulator is simulated. The results show that the revolution of the regulator depends on the zero-pole distribution property of the NTF. The design method proves feasible and the simulation data is of great importance to the regulator design.

当Sigma_Delta调制器的前向通道积分器个数为L时 ,称该调制器为Sigma_Delta调制器。本文首先给出了Sigma_Delta调制器的线性模型。根据该线性模型 ,并考虑输入噪声的影响 ,将L阶调制器设计分解为线性滤波网络和非线性量化器的设计。这样 ,既保证了系统的稳定 ,又使基带内的量化噪声减至最小 ,获得了最佳的量化噪声整形 ,将原来在整个频带内均匀分布的白噪声推向了高频端。设计了噪声传递函数NTF ,并对其进行了优化。最后 ,给出了 5阶Sigma_Delta调制器的仿真结果。仿真结果表明 ,调制器的分辨率主要由噪声传递函数NTF的零极点分布特性决定 ,本文提出的设计方法是可行的。仿真数据对调制器的设计具有重大意义。

 
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