通过对时间梯度误差的分析，得到了新的梯度约束方程；
A novel gradient constraint equation was obtained through analyzing the error of temporal gradient.
在建立回波抵消器模型的基础上，按最小均方误差准则，导出了自适应滤波器抽头的统计梯度算法和抽头调节的收敛公式。
Based on building up a model of echo canceller, the convergence of gradient-type stochastic adjustment algorithm of an adaptive filter under the mean-squared error criterion is discussed.
最后，反求轨道误差和位系数误差对重力梯度测量值的影响。
Finally, the influence of orbital errors and potential coefficient errors on the gravity gradient measurements are conversely found out.
本文则用气候模式对作者提出的有地形数值模式中气压梯度力的误差扣除法进行了模拟检验。
Modelling tests are made in this paper to check the error subtraction scheme of the pressure gradient force in models with topography developed by the authors.
近壁对总压测量影响不大。速度梯度和近壁对测量误差的影响还与来流方向有关。
The effects of the velocity gradient and wall-proximity on the measuring errors are related to the flow direction.
当相位梯度算法挑选的散射点不是孤立散射点时，导致相位误差估计的准确性下降。
If the scatter selected in phase gradient algorithm(PGA) algorithm is not isolated, the accuracy of the phase error estimation will be degraded.
调整该算法中两个梯度矢量的比例系数，可提高该算法收敛速度、减少收敛后的均方误差。
In the MCMA, adjusting the scale coefficients of two gradient vectors can improve the convergence rate and reduce residual mean square error.
最后，通过这些误差界，我们给出了由投影梯度方法产生的迭代序列收敛的条件。
Using the error bounds, we give a condition for convergence of the sequence of iterates generated by projected gradient methods.
在非线性偏微分方程中，根据弱可压缩液体的假设，忽略二次梯度项，在试井较长时间内将产生误差。
According to the assumption of slightly compressible fluid, neglected the quadratic gradient term in nonlinear partial differential equation is usually lead to error.
测量风速梯度时，相对误差小于1%。
When wind gradients are measured, the relative error is less than 1%.
解决了顾及起始数据误差的工测多级控制网的精度梯度。
The problem of measuring accuracy gradient of multi-class engineering control network, which accounts for the initial data errors, has been solved.
首先导出了拉普拉斯、二阶梯度方向导数和侧向曲率三者之间的关系式，指出由于侧向曲率的影响，拉普拉斯在检测弯曲边界时必然产生定位误差。
Our results show that the level crossing curvature can cause location error of the Laplacian, particularly when the edges with large curvatures and small gradients.
自然梯度算法有收敛速度和稳定误差两个重要指标，然而这两个指标存在内在的矛盾。
In the natural gradient algorithm, the convergence speed and stability error are two important indicators, but these two indicators are of inherent contradictions.
研究了机载合成孔径雷达运动补偿中可以补偿任意阶相位误差的相位梯度自聚焦(pga)算法，提出一种PGA快速算法。
PGA algorithm, which can compensate any-order phase error in airborne SAR motion compensation, is discussed in this article. A fast PGA algorithm is also proposed.
加权相位梯度自聚焦（PWEPGA）算法考虑了距离变化对相位误差的影响，扩展了PGA算法的应用范围。
Phase Weighted Estimation PGA(PWE PGA)is suggested which takes into consideration the range dependent phase error, so the PGA can be used in more fields.
梯度使气流方向测量值向负梯度方向偏转。圆柱探针和锥形多孔探针相比，气流方向测量误差对速度梯度更敏感，纵向梯度对俯仰角测量值的影响尤其大。
The velocity gradient, especially the perpendicular velocity gradient, leads the measuring error of flow angle with cylindrical probe to be larger than with conical multi-hole probe.
运用最优梯度下降法使目标的计算值与期望值误差最小来迭代优选权重，建立迭代算法模型。
A few or all of the parameters of the controller are adjusted by using the gradient descent algorithm to minimize the output error.
因此，定义了一种变系数加权的误差函数，以控制梯度范数的大小。
Hence, an error function with variable weighted coefficient is defined to control value of gradient norm.
其实质是采用梯度下降法使权值的改变总是朝着误差变小的方向改进，最终达到最小误差。
The essence of back propagation networks is that make the change of weights become little by gradient descent method and finally attain the minimal error.
第一章是绪论部分。简要介绍了投影梯度方法，误差界估计以及本文的主要工作。
Chapter 1 is the introduction of this paper, which introduces the the projected gradient method, the error bounds estimation and the main results obtained in this paper.
第三章研究了投影梯度方法的误差界估计。
In Chapter 3, some error bounds estimations of the projected gradient methods are obtained.
目前BP网络采用误差逆传播算法学习训练神经网络，该算法是基于网络误差函数梯度下降的。
BP network adopt error against propagate algorithm to leam and train the neural network at present, this algorithm is on the basis of the error function gradient of the network.
两垂直坐标下气压梯度力计算误差在低层两者相差不大，但是往高层高度坐标的气压梯度力误差要明显小于质量坐标。
PGF errors are a little difference between the two coordinates in lower levels, but PGF errors of the height coordinate are obviously smaller than those of the mass coordinate in higher levels.
针对大型复杂铸件毛坯与设计原形存在误差，提出了梯度—模拟退火算法来对铸件毛坯进行适配。
Aiming at the error between original design and large scale and complex rough casting, a gradient (simulated) annealing algorithm for the best fitting method is presented.
为了解决自然梯度算法的这个缺点，人们提出了变步长自然梯度算法，既可以获得较快的收敛速度，又可以减小稳定误差。
Variable step-size natural gradient algorithm which enjoys faster convergence speed and smaller stability error is proposed to solve the shortcoming of natural gradient algorithm.
求出位系数模型和大气阻力引起的重力梯度卫星的轨道误差；
The orbital errors due to the potential coefficient model and atmospheric drag for the gradiometry satellite are obtained;
将影响梯度测量的误差主要分为四种：系统误差、航向磁效应、几何效应、波浪噪声及传感器运动误差。
The errors in the Marine magnetic gradient measurement are divided into system noise, heading errors, geometrical effects, swell noise and sensor motion.
对每一种误差的形成原因及对梯度测量的影响进行分析，得出了一些有益的结论。
The cause of the errors and the infection of them to the gradient measurement are analyzed.
对多聚焦图像和多光谱彩色图像分别采用计算图像信息熵和均方根误差、计算图像平均梯度的方法对融合的性能进行评价。
There is explicit characteristic of correspondence reflecting the droplet transfer among the electric, spectral and image information based on time information fusion.
对多聚焦图像和多光谱彩色图像分别采用计算图像信息熵和均方根误差、计算图像平均梯度的方法对融合的性能进行评价。
There is explicit characteristic of correspondence reflecting the droplet transfer among the electric, spectral and image information based on time information fusion.
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