查询词典 source document

This paper only does research on adaptive blind source separation algorithm in two mixture models梚nstantaneous mixture and convolutive mixture.Blind source separation needs high order statistics.

盲分离算法需要用到高阶统计量，互累积量迫零法是一种直接利用高阶统计量的自适应盲分离算法。

The contributions of this paper are followed:1 IntroductionIntroduce the concept "Blind" and present MEMO blind source separation model.2 Research on the instantaneous mixture systemReview the techniques developed for the demixing of the instantaneous mixture case.3 Research on the linear convolutive systemModel the linear convolutive system and review the deconvolution approaches in time domain.4 Introduce a new method to MIMO BSSA new approach to MIMO blind source separation in frequency domain is introduced, experimental tests are conducted,and results are satisfied.

论文包括了以下几个部分： 1。简介介绍&盲&的概念，并对瞬时混合盲源分离系统进行建模。 2。对瞬时混合多输入多输出系统的研究对瞬时混合系统的盲源分离原理和技术进行了简单的回顾。 3。对线性卷积混合系统时域算法的研究对线性卷积混合系统建模，并对时域的盲解卷方法进行研究和比较。 4。提出了一种对线性卷积混合系统进行分离的新方法提出一种多输入多输出线性混合系统的频域盲源分离方法，进行仿真实验，以验证该算法的效果，初步结果令人满意的

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。

The equivalent standard pollution loadings were compared among different rigions, the results indicated that the water pollution threaten caused by agricultural non-point source pollution was more serious in the south of Jiangsu province and in Nantong than in the other rigions;The equivalentStandard pollution loading rates of different agricultural non-point source pollution in different regions were analysised by clustering analysis method,and the results indicated that Nanjing、 Wuxi、 Zhenjiang and Changzhou were polluted mainly by domestic living pollution;Xuzhou、 Suqian、 Taizhou、 Yancheng、 Lianyungang、 Huaian and Nantong were polluted mainly by chemical fertilizer pollution; Suzhou and Yangzhou were polluted corresponsively by animals feces pollution 、 domestic living pollution、 chemical fertilizer pollution and fish breeding pond pollution.

对各地区的等标污染指数进行比较，发现农业非点源污染对水环境造成的威胁苏南地区和南通明显高于其它苏中、苏北地区；对各个市各非点源污染源的污染负荷率进行聚类分析，发现南京、无锡、镇江、常州以生活污染为主；徐州、宿迁、泰州、盐城、连云港、淮安、南通以化肥污染为主；苏州、扬州两地畜禽粪便污染、生活污染、化肥污染和精养鱼塘污染均占一定的比例。

Aspergillus WQ is selected to explore the factors which affect producing enzymes. The best carbon source is crystallitic cellulose+straw powder, the best nitrogen source is peptone+yeast abstract cream, the best growing temperature is 35℃and the best initial pH is 5.5. WQ can produce the largest quantity of enzymes after being cultivated eight days.

从50℃左右牛粪自然堆肥中筛选了一株产酶量较高的曲霉WQ，对影响其产纤维素酶的因素和酶的热稳定性进行了初步研究，结果表明：液体发酵时，该菌最佳碳源是微晶纤维素+稻草粉组成的复合碳源，最佳氮源是蛋白胨+酵母膏的复合氮源，最适生长温度为35℃，最适起始pH值为5.5，在生长第8天产酶量最高。

For example citrus crops are major sources of vitamin C, carrot (Daucus carota L.) is a source of vitamin A, and grain legumes are a source of protein and essential amino acids.

比如柑桔类作物是维他命C的主要来源，胡萝卜（Daucus carota拉丁语胡萝卜属胡萝卜）是维他命A的来源，而豆类是蛋白质和必须氨基酸的来源。

This experiment utilizes the fungi to deal with neutral gaudy blue GL, study it decolour condition and degrade course investigate carbon source , nitrogen source , pH , temperature , dyestuffs density impact on decolourization of neutral gaudy blue GL.

本次实验利用真菌处理中性艳蓝GL，研究了其脱色条件与降解过程，考察了碳源、氮源、pH、温度和染料浓度对中性艳蓝GL的脱色的影响。

The [less than 1 line of source text not declassified] will stay in direct touch with Dharmsala and will conduct political correspondence with Tibetan refugee groups [less than 1 line of source text not declassified] to create an increased Tibetan national political consciousness among these refugees.

少于源文本1条线没被撤销机密将停留在直接接触与Dharmsala，将举办政治书信以西藏难民小组[ 少于1条线源文本没被撤销机密] 创造增加的西藏全国政治知觉在这些难民之中。

The [less than 1 line of source text not declassified] will stay in direct touch with Dharmsala and will conduct political correspondence with Tibetan refugee groups [less than 1 line of source text not declassified] to create an increased Tibetan national political consciousness among these refugees.

将停留在直接接触与Dharmsala，将举办政治书信以西藏难民小组[ 少于1 条线源文本没被撤销机密] 创造增加的西藏全国政治知觉在这些难民之中。

For this pyrolysis, cadmium acetate dihydrate and sulfur powder were used as the cadmium source and sulfur source, respectively.

以三辛基膦为单一配位溶剂，二水合乙酸福和硫粉为前驱体，用高温热解的方法制备CdS纳米棒。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样