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图标索引 历史查询
 

均方差     
相关语句
  mean square deviation
     The results are satisfactory. Seperation R≥1.54, relative deviation 0.073, and mean square deviation≤0.374.
     获得了较为满意的结果,分离度≥1.54,最大相对偏差≤0.073,最大均方差≤0.374。
短句来源
     RESULTS:Standard deviation of normal-to-normal intervals(SDNN),rate of mean square deviation of successive R-R intervals(RMSSD),the percentage of R-R intervals>50ms(PNN50) and high frequency(HF) all obviously increased after treatment;
     结果:治疗后连续R-R间期标准差(SDNN),相邻R-R均方差(RMSSD),相邻R-R间期大于50ms百分数(PNN50)、高频功率(HF)值均明显上升;
短句来源
     The model 2 of nine d_(0.1) models was selected for P.davidiana. The syst- ematic error was<±0.08% and the mean square deviation was<2.604%.
     山杨从9个d_(0.1)预估模型中选用了模型(2),系统误差<±0.081%,均方差<2.604%。
短句来源
     The presented formulae for describing the estimation process indicate that the mean square deviation of detection accuracy of target bearing from detection device should be no more than 0.1degree.
     文中给出了估计过程的运算公式,指出检测装置对目标方位的检测精度要求均方差不大于0.1°。
短句来源
     Results The mean square deviation between the obtained expression of PDD(in the ray field from 4×4 to 40×40 cm2 and in the ray depth from dmax to 30 cm)was less than 1%.
     结果所得到的百分深度剂量表达式在射野4x4到40x40cm2,dmax到30cm深度范围内与实测数据的均方差小于1%。
短句来源
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  mean-square deviation
     i. e., the degradation caused by size mean-square deviation accounts for 61% of the average degradation caused by all factors.
     即纤度均方差因素占平均等级下降因素的61%。
短句来源
     Introduces the principle of Variance addition and sets forth the related problems on calculating the mean-square deviation in practical application.
     介绍方差相加原理,阐述均方差计算在实际应用中的有关问题。
短句来源
     The merits and weaknesses of mean-square deviation calculation and mean deviation calculation are analysized and compared, and measures to be taken by filatures for the adaptation of the mean-square deviation in carrying out the new standards are suggested.
     文章分析比较了均方差与平均差计算方法之优劣,提出缫丝厂实施《生丝标准》如何适应纤度均方差的措施。
短句来源
     After the ratio value of Z component about day to day ratio of day amplitude surpasses 5 time of mean-square deviation,it is better that the corresponding earthquakes with MS5 in the range of 270 km around them. And it passed R value test with 97.5% level. It showed that it had the good potency to forecast earthquakes.
     Z分量日变幅逐日比值超过5倍均方差线后与周围270 km范围内的MS5地震对应较好,且通过了具有97.5%置信水平的R值评分检验,表明具有较好的预报效能。
短句来源
     confirmation of seismogenic region is made if mean-square deviation with more than 2 times is released by the loaded area and there is piling up pattern of earthquakes with M3 0~4 9 in space and time and inner correlation among different precursor anomalies in near-source region is considered taking the seismogenic region as loading body;
     这一预报思路首先根据历史震例中区域应力场的活动轨迹 ,跟踪其当前加载区域和活动构造 ,以被加载区域预释放大于 2倍均方差及 3 0~ 4 9级地震时空丛集图象确认孕震区的存在 ;
短句来源
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  quadratic mean deviation
     Extensive simulation results show, that algorithm adapts to fast time-varying data like orbit parameters of the space target, and quadratic mean deviation of the orbit parameters estimated excels the theory quadratic mean deviation of various sensors, and less than the LMS estimation' s.
     仿真实验表明,该算法适用于空间目标轨道参数等快时变数据,估计得到的轨道参数均方差,优于各个传感器的理论均方差,同时也小于LMS算法获得的均方差
短句来源
     The theory analysis and computer simulation show the maximum quadratic mean deviation of the compensation is 0.1300 and that off-the shelf algorithm of compensation is 2.9773. It is obvious that the method is efficient.
     理论分析和仿真计算表明,采用此方法补偿之后得到的均方差最大为0.1300,而没有补偿的结果最大的均方差为2.6094,表明这种方法是有效的。
     As the LMS algorithm is a kind of noise gradient method, the convergence gain should be lessened gradually to ensure that the quadratic mean deviation of the steady state takes the quadratic mean deviation of the system as its limit.
     另外 ,由于LMS算法是噪声梯度法 ,须使其计算步长逐渐缩小 ,以保证LMS算法的稳态均方差趋向于系统的最小均方差
短句来源
     The theory analysis and computer simulation show the maximum quadratic mean deviation of the compensation is 0.1300 and that off the shelf algorithm of compensation is 2.9773. It is obvious that the method is efficient.
     理论分析和仿真计算表明,采用此方法补偿之后得到的均方差最大为0 .130 0 ,而没有补偿的结果最大的均方差为2 .6 0 94 ,表明这种方法是有效的。
短句来源
     Using a seismic location method put out by Prugger et al in 1988, by adding the stochastic disturbance at differen quadratic mean deviation levels, in numerical wodelling for locating those earthquakes which just occurred in outside of seismic network or the seismographic stationis are scarce, their final results obtained are good.
     鉴于汕头遥测台网所覆盖的地区对于南澎列岛和台湾海峡地区来说偏于一侧,传统的地震定位方法得到的结果不甚理想,本文采用了Prugger等在1988年提出的一套地震定位方法,在数值模拟中,加入不同均方差水平的随机误差,进行选代计算。
短句来源
更多       
  mean square difference
     SLSF method and non-selective least square fitting(NSLSF) method were used to analyze the Paw,V' and V data at the near-relaxation state. Comparisons were made between fitting efficiency parameters including Root mean square difference(RMSD) and determining coefficient(R2) of SLSF method and that of NSLSF method.
     分别以SLSF法和NSLSF法分析“接近松弛”状态时的气道压力(Paw)、流量(V')和容积(V)数据,比较SLSF法与NSLSF法拟合效率指标根均方差(RMSD)和决定系数(R2)的大小。
短句来源
     The mean square difference method which has a relatively high precision was introduced to ensure the index weight, avoid the subjective judgment with artificial experience and improve the objectivity and accuracy.
     采用精度较高的均方差法确定指标权重,以消除人为经验主观判断,提高评价的客观性和准确率;
短句来源
     Based on the survey data of 40 airports,the mean value and mean square difference of structural parameter probability distribution have been got,to find out the variation scope of structural parameter.
     在40多个机场实测道面参数的基础上,得到了所测机场道面结构参数的概率分布的均值和均方差,并确定了道面结构参数的变异范围。
短句来源
     The comparison of IWV estimates derived from GPS and radiosonde observations for a 51 day period at Shantou station is given. Both have an average bias of 6.5 mm,and the root mean square difference is 4.3 mm.
     地基GPS反演的大气水汽总量与探空得到的大气水汽总量 ,两者随时间演变的趋势一致 ,两者估算的水汽总量平均偏低 6 .5mm ,两者偏差的均方差为 4.3mm。
短句来源
     C band real radar sea-clutter data were analyzed and the modified mean square difference test for analyzing the “tail” of clutter was constructed.
     对C波段实测雷达海杂波数据进行了统计分析,并为分析杂波“拖尾”特性构造了修正的均方差检验法;
短句来源
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  mean square deviation
The expressions obtained for the mean square deviation from the initial direction of beam propagation generalize the "3/2 law."
      
It was demonstrated that the mean square deviation of the received power is defined by a parameter equal to the ratio of the aperture diameter to the characteristic dimension of the spatial variations of the light field.
      
The root mean square deviation is 0.001 5 nm for the bond length and 1.753° for the bond angles.
      
In this paper, we prove inequalities for the mean square deviation δN,n of the N step transition matrix from the equiprobable matrix for certain random affine walk in the residue ring modulo n with dependent linear and drift components.
      
A mean square deviation of the polarization direction of 5 s of arc results for a typical He-Ne-laser.
      
更多          
  mean-square deviation
Mean-square deviation was employed to determine the weight of each factor and then step-up multilayer synthesis with linear weighting function was used to build a two-level hierarchy and collection index health consultation model.
      
The root-mean-square deviation between the experimental and calculated characteristic temperatures varies from ~?30 K (for the glass transition temperature and the Littleton point) to ~?50 K (for a viscosity of 104P).
      
The root-mean-square deviation between the calculated and experimental heat capacities of melts is equal to ~2.5 J/(g-atom K), which corresponds to a relative error of 8-10%.
      
Calculated values of the mean-square deviation showed that the iteration method provides a higher accuracy.
      
It is shown that taking into account multiply charged ions reduces the relative root-mean-square deviation from 0.18 to 0.03.
      
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