根据预备知识，利用紧性定理和先验估计，证明了系统最优控制的存在性。
The existence of the optimal control for the system is demonstrated via compactness theorem and prior estimates.
其次在先验估计的基础上用能量方法得到了该模型非常数正解的不存在性；
Second, the non-existence of non-constant positive steady-states are given based on the priori estimates, in which energy method are used;
利用算子半群方法和先验估计，证明了该问题整体弱解和整体强解的存在唯一性。
By the methods of operator semigroup and apriori estimates, the existence and uniqueness of the global weak solution and the global strong solution for the system are obtained.
在第二章中我们证明了拟线性椭圆型方程存在无穷多个正奇异对称解，并且满足先验估计。
The main contents are as follows: in chapter 2, we proved that there exists infinitely many singular positive radial solutions which satisfy apriori estimates for quasilinear elliptic equations.
本文所用的主要方法，包括Galerkin逼近、粘性消失、先验估计以及不动点方法。
In this thesis, we mainly use the methods including Galerkin approximation, vanishing viscosity, a prior estimate and fixed point method.
讨论了一阶非线性椭圆型方程组斜微商问题解的稳定性，这个结果是借助于有关边值问题解的先验估计而导出的。
This paper discusses the stability of solution of the oblique derivative problem for the nonlinear elliptic system of first order equations.
第三章研究了基于先验弹道模板的主动段战术参数估计与落点预报问题。
Chapter III studies tactical parameters estimation of boost phase and impact position prediction problems based on prior trajectory profile.
这两种方法在一定先验知识的基础上采用较少的参数来描述说话人间的差异，因而只需要少量的自适应数据就可以得到参数的鲁棒估计。
Based on some prior knowledge, the proposed approaches utilize fewer parameters to describe the variation between speakers, and thus fewer adaptation data are needed to give robust estimation.
从这一角度出发，就可以借助统计学中已有方法，建立一套关于先验分布选取的合理方法，同时能估计其精度。
From this point, we can establish a set of reasonable methods about selecting prior distribution and estimate its accuracy with the help of existed methods in statistics.
同时，先前估计的全局破坏概率，能够用作额外的先验信息，来给出全部校准的破坏概率。
At the same time, the previous global estimate of failure probability can serve as additional prior information to yield the overall calibrated probability.
为了从有附加噪声的观测数据中估计信号的谱，噪声的先验知识总是要应用的。
In order to estimate the spectrum of the signal from the observed data with additive noise, the prior Knowledge of the noise is always used.
利用发射信号为已知这一先验信息，提出了二次相关估计时延的解决方法。
The twice correlation method, which uses the apriori information of the sending signals, is proposed as a solution.
先验模糊辨识方法是先获得点扩展函数的信息后再进行图像恢复，而迭代盲目反卷积方法是同时估计出清晰图像和点扩展函数。
Priori Blur Identification gets the PSF before restoration implementation, while Iterative Blind Deconvolution estimates the true image and the PSF at the same time.
引入像素强度的先验概率分布模型，运用模拟退火算法选择合适的邻域结构，获得强度的最优估计。
The prior information of pixel intense distribution is introduced. Then simulated annealing algorithm is applied to choose the proper neighborhood structure, and the optimal estimate can be obtained.
常用的时延估计方法是广义互相关方法，按方法对于较少先验知识、大背景噪声具有一定的局限性。
The common using method is generalized cross correlation, but it has a definite limitation to those without transcendental information on the occasion of having much noise.
本文提出了一种估计具有先验知识的多正弦信号参数的改进方法。
An improved approach is proposed for the sinusoidal retrieval in the presence of prior knowledge.
在自由飞行段，分析了追踪航天器估计状态误差的先验值和测轨误差对状态误差传播的影响。
In the free flight segment, effects on the state error propagation caused by prior state estimation errors and orbit determination errors of the chasing spacecraft were studied.
该方法首先在不知道任何基阵方向向量先验知识的情况下，利用信号的多普勒信息估计波束形成的权矢量。
The weight vector of beamforming is estimated by Doppler information of the signal first, then it is approximated by RBFNN to carry out the blind optimizing beamforming.
最后我们获得了压力和浓度的最优先验误差估计。
At last we obtain the optimal prior error estimate for both concentration and pressure.
对满足一类新的含反常积分非线性不等式的有界函数建立了先验逐点估计。
Apriori point-wise estimations are established for bounded functions satisfying a new class of nonlinear inequalities involving improper integrals.
以粒子滤波器估计的目标位置作为先验知识，可以改进前景目标位置的重构。
Taking a prior knowledge as target position which is estimated by a particle filter, it is possible to improve the reconstruction of foreground target.
从最小二乘配置出发，推导了附加先验约束的高精度GPS网平差的参数估计和精度估计公式。
Substantively to say, the adjustment model of GPS network with apriori constraint is a kind of Least Squares Collocation model.
设计了一个先验密度惩罚图像当中分水线变换后的相似的区域，图像分割进而变成对目标子集的最大后验估计。
The segmentation problem is the maximizing a posteriori estimation of the set of object area result from the watershed labeled.
通过对常用分布的随机模拟，阐述几类先验分布对估计效果的影响；
By random simulation for some common distributions, the effects of some prior distributions on the estimated results are discussed.
核密度估计方法从数据样本本身出发研究数据分布特征，不利用有关数据分布的先验知识，避免了模型估计和参数估计的主观影响。
The kernel estimation method analyzes the data distribution by not using the prior knowledge of data distribution. This method avoids the impaction of model and parameters estimation.
图像的小波系数具有很强的非高斯统计特性，可以建立推广的拉普拉斯先验分布，用贝叶斯估计对图像小波系数滤波来达到降噪目的。
The wavelet subband coefficients of images have highly non Gaussian statistics that may be modeled with generalized Laplacian distributions, and Bayesian estimation is used to suppress noise.
辅助长码直捕的一个最重要的先验信息是时间信息，卫星信号传播时延估计是减少时域搜索范围的一个重要方面。
Time is important information for fast and direct acquisition of military code, and compression of signal's propagation delay time uncertainty is an effective means for it.
最后，从方差分量估计的角度讨论了先验约束对观测值自由度的影响。
At last, the effect of apriori constraints on the degree of freedom for observations is discussed from the viewpoint of VCE.
噪声功率谱估计和先验信噪比估计的准确性有助于提高增强后的语音质量。
Correct noise power spectrum estimation and apriori signal-to-noise ratio (SNR) estimation are all essential to good quality of the enhanced speech.
本文提出了利用非零循环频率处谱峰的位置与大小估计这三个参数的算法，该算法不需要信号参数的先验信息；
A parameter estimation algorithm of chirp signal which makes use of the position and magnitude of non zero cyclic spectral peaks to estimate the three parameters is presented.
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