平方根

An algorithm based on the square-root unscented Kalman filter is proposed for weight estimation of the neural network, which can overcome the BP algorithm's drawbacks of slow learning speed, high computational complexity and the likeliness to make the study fall into the local minimum points.

提出一种利用平方根无轨迹卡尔曼滤波进行神经网络权值估计的算法，该算法可以克服BP算法存在的学习速率缓慢、计算量大、容易使学习陷入局部极小等缺点以Mackey-Crass混沌时间序列作为神经网络输入，运用SR-UKF算法、UKF算法、BP算法仿真神经网络。

The products of the square - root of internal pressure A and the molar volume of the repeated unit Vm for various polymeric liquids at 298.15 K are plotted against their van der Waals volumes . A straight line through the origin of coordinates is obtained.

将298.15 K时各种液态聚合物的内压平方根λ和重复单元的摩尔体积Vm的乘积对它们的van derWaals体积作图时，发现是一条通过坐标原点的直线。

On the basis of introducing the fixed point of Banach theorem, this paper firstly elaborates the important application of the existence of the solution of the linear algebraic equation and the ordinary differential equation, then it narrates the important application of obtaining the leading Newton repetitive process and the natural number the inferior square root and the equation root in the approximate calculation.

本文在介绍Banach不动点定理的基础上，首先阐述了其在线形代数方程、常微分方程解的存在性中的重要应用；然后讲述了其在求导Newton迭代法、求自然数的次平方根、求方程根的近似计算中的重要应用；最后，介绍了其在求一类递推数列极限中的应用。

We gain the distributing instance as a whole by the spatial analyse of the daily、 mensal and annual precipitation.Then, we adopt mean error、 mean absolute error、 mean relative error、 and the root mean squared interpolation error and the correlative coefficient as the determinant standard of interpolation effect. The results show that the mensal precipitation effect of SIA is the best, and the daily precipitation effect is worse reversely.

然后，对年降水量、月降水量以及日降水量的SIA结果采用平均误差、平均绝对误差、平均相对误差、插值平均误差平方和的平方根误差以及相关系数作为判定插值效果的标准，并得到以下结果：月降水量的SIA效果最好，日降水的相对较差。

Firstly, we study how the ensemble number, surface soil moisture observational error and model error impact on the results.

第四章研究了集合平方根滤波同化方法利用表层土壤湿度观测反演深层土壤湿度信息的能力。

Multiply 0.13nV by the square root of the ohmic value of a resistor to find the noise in a 1Hz bandwidth.

6/ 电阻阻值的平方根，乘以0.13纳伏，可以得到1赫兹带宽的噪声。

The results showed that there was good linear relation of cumulative evaporation with square root of evaporation time, and the coefficients of them had good relation with the open hole ratio, thus the two-factor function of cumulative evaporation was obtained.

累积蒸发量与时间平方根的线性关系符合Gardner的理论关系，而两者关系的系数又与覆膜开孔率之间存在良好的对数关系，从而得出了累积蒸发量的两因素函数关系。

Author, secondly, starts from the approximate expandness of square root operator, perform mathematical calculations for finite difference operator in frequency-space domain, Fourier finite difference operator in mixing domain(frequency-space and frequency-wavenumber domain) and general screen operator in mixing domain, compare and discuss their precision of their wavefield, adaptability for lateral velocity variations, computation efficiency and stability.

第二，从平方根算子的近似展开出发对频率—空间域的有限差分算子、混合域(频率—空间域；频率—波数域)的Fourier有限差分算子、混合域的广义屏算子进行了推导并对其波场描述精度、对横向变速的适应性、计算效率和稳定性进行了比较与评述。

The analysis results of these shift orthogonal functions in GSM channel, which is compared with that of conventional shaping filters such as square root raised cosine functions, show that it has better performance.

最后通过与常用的平方根升余弦函数波形在GSM信道中的数值解比较，说明了基于小波包函数的移位正交传输波形优于传统的波形。

This paper presents in detail principal theory used to solve linear unbiased least variance estimation problem using Givens-Gentleman orthogonal transformation without square root computation and applies the theory to three stage-multiarc estimation.

本文详细介绍了利用不求平方根的Givens-Gentleman正交变换解线性无偏最小方差估计问题的基本原理以及这种方法在卫星激光测距三级复弧估计技术中的具体应用，给出了计算估值协方差的一组新的公式。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。