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零位值
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     METHODS:A first derivative spectrophotometric method was used by valley-zero method for the determination of diltiazem hydrochloride sustained release tablets in the solvent of alcohol,the wave length of determination was 250±1nm.
     方法 :以乙醇为溶剂 ,以一阶导数光谱的谷 -零位值法测定盐酸地尔硫艹卓 的含量 ,测定波长λ谷 =2 50± 1nm。
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  相似匹配句对
     THE DISTRIBUTION OF VALUES OF ZERO ORDER FUNCTIONS
     级函数的分布
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     on the other,its time value is zero.
     二是A的时间
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     Place Value Thought in Numerations
     记数法中的思想
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     Distance and Place Value on Plane Region
     平面域上的距和
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     An Experimental Study on the Stability of Zero Position
     稳定性实验研究
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  zero value
Mass transport at a long distance in systems with percolating features is reduced to a nonlinear diffusion equation, with a zero value of the diffusion coefficient below the percolation threshold.
      
At a zero value of this parameter, the matrix of the system is constant, has two identical pairs of purely imaginary roots, and is not reducible to diagonal form.
      
Laue diffraction of X-rays in GaAs at the zero value of the real part of the structure factor for quasiforbidden reflections
      
Above the phase-transition point the minimum of the potential (the maximum of the distribution of the monopole creation operator) corresponds to a zero value of the monopole field Fmon.
      
In the scalar approximation, an analysis is made of the light field structure in the vicinity of a line of the ring phase dislocation corresponding to the zero value of the field formed by the interference of two uniaxial Gaussian beams.
      
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OBJECTIVE:To establish an accurate method for the determination of diltiazem hydrochloride in its sustained release tablets.METHODS:A first derivative spectrophotometric method was used by valley-zero method for the determination of diltiazem hydrochloride sustained release tablets in the solvent of alcohol,the wave length of determination was 250±1nm.RESULTS:The recovery was 100.04%.The relative standard deviation was from 0.38% to 0.47%.The linear range was 2.4~16.8μg/ml.CONCLUSION:The method was convenient,rapid,accurate...

OBJECTIVE:To establish an accurate method for the determination of diltiazem hydrochloride in its sustained release tablets.METHODS:A first derivative spectrophotometric method was used by valley-zero method for the determination of diltiazem hydrochloride sustained release tablets in the solvent of alcohol,the wave length of determination was 250±1nm.RESULTS:The recovery was 100.04%.The relative standard deviation was from 0.38% to 0.47%.The linear range was 2.4~16.8μg/ml.CONCLUSION:The method was convenient,rapid,accurate and suitable as assay of the preparation.

目的 :建立测定盐酸地尔硫艹卓 缓释片的含量测定方法。方法 :以乙醇为溶剂 ,以一阶导数光谱的谷 -零位值法测定盐酸地尔硫艹卓 的含量 ,测定波长λ谷 =2 50± 1nm。结果 :回收率 1 0 0 .0 1 % ,RSD 0 .3 8%~ 0 .4 7% ,线性范围2 .4~ 1 6.8μg/ml。 结论 :方法简便、快速、准确 ,适合于该制剂的含量测定。

Based on the analysis of zero characteristic for low precision gyros,a new time-division zero calibration method was proposed to solve the problem that the zero position error of the micro-machined gyro seriously affect the location precision of the guide system composted of the gyro.The method divides the calibrating time into two segments,the mean value filter is adopted to remove the static bias in the first segment,and certain mathematics model is built to eliminate semi-static bias in the second segment.The...

Based on the analysis of zero characteristic for low precision gyros,a new time-division zero calibration method was proposed to solve the problem that the zero position error of the micro-machined gyro seriously affect the location precision of the guide system composted of the gyro.The method divides the calibrating time into two segments,the mean value filter is adopted to remove the static bias in the first segment,and certain mathematics model is built to eliminate semi-static bias in the second segment.The experiment indicates the bias is reduced by more than 90% in this way.To further improve the compensation precision,a zero position compensation method of transfer alignment was presented,i.e.combining with the high precision position signal of carrier to calibrate the original zero position of inertial measurement unit of the micro-(machined) gyro.Simulation experiments show that the starting time of the optimal alignment is in 20~30 ms after gyro is stabilized.The length of alignment time of master and sub-system can be restricted within several hundred milliseconds and zero position error can be limited to less than 0.01(°)/s in the range of the carrier sway frequency.The error caused by synchronous time difference of the master and sub-system is changed periodically in ms order.

针对微机械陀螺仪零位误差严重影响制导系统的定位精度问题,提出了时间分段的零位补偿方法.该方法将零位校准时间进行分段,在准备时间段采用均值滤波,将静态零偏值一次性基本校除,在工作初始时间段内根据特性建立一阶或高阶补偿模型校零,对准静态零偏值进行校除.经实验验证,该方法使零偏值比校正前降低了90%以上.为进一步提高补偿精度,提出了应用传递对准这一零位补偿方法,即结合载体高精度方位信号校正微型陀螺仪测量组件系统初始零位值,有效地提高了校零的时效性.仿真实验表明:传递对准最佳起始时刻在陀螺仪稳定工作后10~30 ms后,主、子系统传递对准时间长度可在几百毫秒内,零位误差在载体抖动频率范围内可以被限定在0.01(°)/s以下,主、子系统同步时差所引起的误差项呈毫秒级周期性变化.

 
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