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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。

Then, a series of successful numerical simulations on the finite length inclined positively buoyant jets in uniform cross flows environment are developed. Based on the results from numerical simulations, some qualitative pictures of the complex three -dimensional mean flows are given. In terms of these pictures, the flowing behavior of the buoyant jets and the mechanism of end-vortexes generation are made a study. The change rules of end-vortexes and temperature and dilution on trajectory of jets, horse-hoof shape of buoyant jets on horizontal, the phenomenon of the jets touch wall, and the effects of diffuser length^ densimetric Foroude number % velocity ratio on buoyant jets are also given.

之后对均匀横流环境中的有限长线源型倾斜浮力射流进行了大量的数值计算，根据数值模拟的结果，绘出了一些复杂的三维图，据此探讨了其流动特性及端涡的产生机理，成功模拟了端涡现象及其发展过程，对轨迹线上沿程温度及稀释度的变化规律，倾斜浮力射流的马蹄形结构，浮力射流的贴壁现象，扩散器长度、喷口弗汝德数、流速比等对浮力射流的影响等问题均给出了有价值的结论。

Be not disheart'nd then, nor cloud those looks That wont to be more chearful and serene Then when fair Morning first smiles on the World, And let us to our fresh imployments rise [ 125 ] Among the Groves, the Fountains, and the Flours That open now thir choicest bosom'd smells Reservd from night, and kept for thee in store.

因此你不要灰心，不要愁云满面，应该比那美丽的晨光更加兴高采烈，以微笑迎接世界的新事物，现在我们起来吧，到树林、泉水和花丛中去，神清气爽地工作吧。

Dissect the fascia from the dorsum down to the bursa oer the medial aspect of the metatarsal head. Then make a cured incision through the bursa and capsule of the joint Fig. 1-24,; begin the incision oer the dorsomedial aspect of the joint, continue it proximally dorsal to the metatarsal head and then plantarward and distalward around the joint, and end it distally on the medioplantar aspect of the metatarsophalangeal joint.

然后弧形切开滑囊及跖趾关节囊图1-24，，切口起自关节背内侧，自跖骨头背侧向近端延长，然后转向跖侧，再转向远瑞，环绕关节而行，最后在远端终止于跖趾关节的跖内侧面，此切口形成一椭圆形网球拍状组织瓣，连接于近节趾骨的基底部

Then, passes through the intense thorough plan and the preparation, on April 11, 2999, the universal time 0.0 quarters, the entire Earth humanity starts carries out the code number was "counter-attacks certainly" the campaign plan, the person from a different world horse builds up rapidly sends out, kidnaps somebody the kind of starship to look like the black cloud innumerably which two groups whirl, contains the huge energy to fly rapidly to the profound outer space, all is at the battle condition the human brave warriors, already completed for have saved the humanity to drain away the last drop of blood preparation, now only then fights, the brave dauntless fight!

就这样，经过紧张周密的计划和准备，2999年4月11日，世界时间0点0刻，整个地球人类开始执行代号为&绝地反击&的战役计划，两路人马迅速集结出动，无数架人类星际飞行器像两团急行的黑云，蕴藏着巨大的能量急速飞向深邃的太空，所有处于战斗状态的人类勇士们，已经做好了为拯救人类流尽最后一滴血的准备，现在只有战斗、勇敢无畏的战斗！

Where she won't dare Anyway In the mirror She's not there Where she won't care Somewhere =================================== Loomer Tiptoe down To the holy places Where you going now Don't turn around Little girls In their party dresses Didn't like Anything there v Pretty boys With their sunshine faces Carrying their Heads down Tiptoe down To the lonely places Where you going now Don't turn around ===================================== To Here Knows When Kiss Your fear Your red button Falls from my mouth Slip Your dress Over your head It's been so long Move On top Because that way You touch her too Turn Your head Come back again To here knows when ==================================== When You Sleep When I look at you Oh, I dont know what's Once in a while And you make me laugh And I'll see tomorrow And it won't be long Once in a while Then you take me down Then you walk When you say "I do" Oh, I don't you I can't forget it ???

那里，她就不敢再无论如何，在镜子里她不是有那里，她不会照顾某处=================================== loomer 趾尖下跌以圣地如果你现在去不掉头小女孩在他们的党衫裙不喜欢那里的任何事情 v漂亮男孩他们的阳光面孔携带元首下跌趾尖下跌向孤独的地方如果你现在去不掉头=====================================到这里不知何时吻你的恐惧你的红色按钮瀑布从我的嘴支路你的服饰在你的头上比赛是如此漫长。动议顶部因为这种方式你抚摸她太反过来你的脑袋再来到这里不知何时====================================当你的睡眠当我看着你哦，我dont知道发生了什么曾经在一段时间你让我发笑我会和明天它会不会很长曾经在一段时间那么，你带我下来然后你走当你说&我愿意&哦，我不，你我不能忘记它？？？

Dissect the fascia from the dorsum down to the bursa over the medial aspect of the metatarsal head. Then make a curved incision through the bursa and capsule of the joint Fig. 1-24,; begin the incision over the dorsomedial aspect of the joint, continue it proximally dorsal to the metatarsal head and then plantarward and distalward around the joint, and end it distally on the medioplantar aspect of the metatarsophalangeal joint.

然后弧形切开滑囊及跖趾关节囊图1-24，，切口起自关节背内侧，自跖骨头背侧向近端延长，然后转向跖侧，再转向远瑞，环绕关节而行，最后在远端终止于跖趾关节的跖内侧面，此切口形成一椭圆形网球拍状组织瓣，连接于近节趾骨的基底部

First, it analyses all-around design of the electronic computer-based interlocking system and each module, then from introducing CAN bus, it lucubrates design of the censorial module's software and hardware which is based on CAN bus of signal lamp's stimulant state, then the hardware's circuit of the entire system's censorial module is made up of opsonic circuit, collecting circuit, microcontrolled circuit,circuit of communication, interrupt circuit of overcurrenting and reset circuit.

首先对全电子计算机联锁系统的总体设计及各个执行模块进行全面的分析和研究，然后通过介绍CAN总线技术，着重研究了基于CAN总线的信号灯模拟状态监测模块的软硬件设计，其中整个系统监测模块的硬件电路主要由硬件调理电路、采集电路、微控制电路、通信电路、高过流中断电路、复位电路等部分组成。

First it analyses all-around design of the electronic computer-based interlocking system and each module then from introducing CAN bus it lucubrates design of the censorial module's software and hardware which is based on CAN bus of signal lamp's stimulant state then the hardware's circuit of the entire system's censorial module is made up of opsonic circuit collecting circuit microcontrolled circuitcircuit of communication interrupt circuit of overcurrenting and reset circuit.

首先对全电子计算机联锁系统的总体设计及各个执行模块进行全面的分析和研究，然后通过介绍 CAN总线技术，着重研究了基于 CAN总线的信号灯模拟状态监测模块的软硬件设计，其中整个系统监测模块的硬件电路主要由硬件调理电路、采集电路、微控制电路、通信电路、高过流中断电路、复位电路等部分组成。

First, it analyses all-around design of the electronic computer-based interlocking system and each module, then from introducing CAN bus, it lucubrates design of the censorial module%26rsquo;s software and hardware which is based on CAN bus of signal lamp%26rsquo;s stimulant state, then the hardware%26rsquo;s circuit of the entire system%26rsquo;s censorial module is made up of opsonic circuit, collecting circuit, microcontrolled circuit,circuit of communication, interrupt circuit of overcurrenting and reset circuit.

首先对全电子计算机联锁系统的总体设计及各个执行模块进行全面的分析和研究，然后通过介绍CAN总线技术，着重研究了基于CAN总线的信号灯模拟状态监测模块的软硬件设计，其中整个系统监测模块的硬件电路主要由硬件调理电路、采集电路、微控制电路、通信电路、高过流中断电路、复位电路等部分组成。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。