查询词典 acoustic

It is useful to the measurement of transmitted time of sound wave in acoustic pyrometry and to the sound source location of 'four-tubes' leaking in boiler based on TDE.

不仅为声学测温中的声波飞渡时间测量提供了指导，而且对基于时延估计的锅炉四管爆漏声源定位有一定的参考价值。

At last, an investigation on the reconstructing mechanism, methods and relational algorithms of 3-D temperature field with acoustic pyrometry is made. Furthermore, an elementary discussion on key points in the reconstruction is given.

最后，对三维温度场声学测量方法的机理、方法和有关算法进行了研究，对声学温度场测量中的几个关键技术进行了初步的探讨。

The accurate transmitted time of sound wave in acoustic pyrometry has the vital significance.But it possibly enables the background noise to change when the boiler under the different capacity,the different load,and the different time.

准确的声波飞渡时间在声学测温中具有非常重要的意义，但是不同容量、不同负荷、不同时刻下运行的锅炉都可能使得背景噪声发生变化。

Experiment on acoustic pyrometry is done using the chirp signal, white noise and sine wave respectively in a 300MW boiler in one domestic power plant, through fire hole on furnace wall.

在国内某电厂的300MW机组锅炉上，利用炉墙上的观火孔，分别用扫频信号、白噪声信号和正弦信号进行了冷态下的声学测温试验。

Acoustic pyrometry ; furnace ; cross-correlation ; chirp signal ; combustion noise

声学测温；炉膛；互相关；扫频信号；燃烧噪声

Lu J. Acoustic computer tomgraphic pyrometry for two-dimensional measurement of gases taking into account the effect of refraction of sound wave paths .

田丰，孙小平，邓福军，邵富群，王福利。声学法电站锅炉温度场重建算法的研究与比较。量子电子学报， 2003， 20(5)： 607～612薛飞，黄国权，李晓东等。CCD计测量燃烧室截面温度场的原理研究。

ABSTRACT Surface acoustic wave device is an advanced analog signal processing device, is widely used in modern communication and rada...

声表面波器件，是一种先进的模拟信号处理器件，由于其优良性能，在现代通信、雷达等系统中运用广泛。

Of which,wet basis ash content is defined by gamma-ray log,and the precondition is the ash mainly argillaceous and contains no radioelement;carbon is defined by density log and artificial gamma log,and moisture calibration for density log ;saturated porosity is defined by density log after ash calibration;gas content is defined by acoustic log and density log compou.

其中以自然伽马测井确定湿灰分，该方法的前提条件是湿分主要是泥质且泥质不具放射性元素；以密度测井与人工伽马测井确定含碳量，并对密度测井作湿分校正；以灰分校正后的密度测井确定饱和水孔隙度；含气量的估算以声波测井和密度测井组成的复合参数ΔT/dDEN来确定，或以视电阻率曲线确定含气量。

First,the rational optimal objective function for acoustic field pattern is put forward. Then, two optimal algorithms for global optimization are proposed.

在对空间声场提出合理的优化目标函数后，提出了两种优化算法进行全局寻优：一种是遗传算法构造的声场模式控制算法；另一种是特征向量算法。

Besides, a simulating calculation and analysis of this acoustic ray tracing algorithm in model temperature was given.

仿真结果表明，温度梯度场中的声波路径发生了明显的弯曲，并且由高温区域向低温区域弯曲。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。