数学盲

Then, the relation between vibration and sound, the acoustic holography method, the indeterminacy and identifiability of BSS, the BSS algorithm are discussed in detail. Based on above researches, the dissertation is divided in following four sections. The first section investigates the BSS algorithm suitable to acoustic feature separation. The algorithm of the joint approximate diagonalization of eigen-matrices is proposed. The spectra or the time-frequency distributions of source signals are the interesting features in ABD and they are separated from mixing signals by JADE algorithm. Then, the convolutive mixing model is transformed into a high-dimension instantaneous mixing model, and the deconvolution of source signals is achieved by the joint approximate block diagonalization of eigen-matrices. The proposed algorithm has a global minimum, and it is unsensitive to noise interference.

论文首先概述国内外声学诊断研究进展与盲分离研究进展，给出机器噪声声场与盲分离的数学描述，讨论了声振辐射、声全息、盲分离模型、盲分离可解性、盲分离结果不确定性、分离算法等基本问题，在此基础上，论文的研究工作分为以下四个部分：第一部分研究适用于声学特征分离的盲分离算法，提出基于特征提取的联合近似对角化盲分离算法，该算法以频谱特征或时频特征作为分离目标，从混合信号中分离源信号频谱特征或时频特征，最大限度地保留了与声学特征提取有关的频谱特征或时频特征，采用模型变换把卷积混合模型变换为一个高维瞬时混合模型，通过联合近似分块对角化算法实现源信号频谱特征与时频特征的盲反卷积。

Through the experiment results, in different phonation model, analysis the properties of glottal vocal efficiency, vocal folds vibration, and voice source.

我们在对嗓音—呼吸系统进行自动分割与分段特征表达的目标指引下，建立了具有国内一流水平的嗓音声学实验室；从概念上对嗓音—呼吸系统重新划分，以声门为中心分别建立去耦合和弱耦合条件下的嗓音—呼吸系统和肺胸系统数学模型；采用离体犬喉作为声带振动的物理模型，对数学模型进行完善与证实；采用盲解卷技术在去耦合和弱耦合条件下，提取上下声道传递函数、嗓音源和发声效率，研究上下声道去耦合和弱耦合条件下不同发声方式与状态对发声效率的影响。

Based on blind number theory in unascertained mathematics, primary research on water environment risk is made with uncertained information.

基于未确知数学中有关盲数理论，对不确定性信息下河流水质风险分析问题进行了初步研究。

From this case, in the assessment, the data of several different time intervals are taken and corresponding confidence levels given, and, employing blind values to express monitoring data and perambulating inspection results, the process method of blind information is applied to the practice of comprehesive assessment. With the observation items in Xiaolangdi Project, the influence factors determing the assessment result are described in the form of blind data. The data are processed according to the blind data algorithms and some scientific and reasonable assessment results are acqired, and the process method overcomes the defect of traditional numerical model, viz., too definitive description of information.

基於此，在综合评判中选取多个不同时间段的数据并赋以相应的可信度，利用盲数表达监测数据和巡视检查结果，将盲信息的数学处理运用到土石坝安全综合评判的工程实例中，并运用盲数运算法则进行盲数处理的探讨，得到了有一定参考价值的评判结果，并克服了传统的数学模型信息描述过於绝对化的问题。

Pratham's response to widespread illiteracy and innumeracy was to experiment.

Pratham对为数众多的文盲和数学盲进行试验。

Make friends with math. Fight 'innumeracy'.

与数学为友，不要做个数学盲。

The article elaborates the basic theory and mathematics model of ablating cornea by Excimer Laser, makes out the model which partition the cornea ablation area to 30 or 60 ablating circles, and arrives at the error of real calculation corve and academic model curve by comparing a with them under the help of MATLAB software, achieves the success of coney experiment and blind eyes' experiment, thus establishes the clinical experiment basis of cornea ablation in advance.

文章论述了准分子激光消融眼球角膜的基本原理和数学模型，提出了把角膜治疗区域有目的地划分成30个或60个消融道的模式，通过MATLAB软件把理论计算曲线和实际模型曲线进行比较，得出它们的消融误差，并且成功进行了动物实验和盲眼实验，提前为角膜屈光的临床实验奠定了基础。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。