查询词典 band spectrum

Arc plume emis— sion spectrum which fits the Planck blackbody radiation function by assuming T=4 350 K shows Swan band system of C2.The arc plasma temperature is about 4 300~4 400K,and the error is about 100K.

放电过程中的电弧等离子体光谱测试表明其中主要有C2分子的发射峰，光谱分布曲线与普朗克黑体辐射曲线中T=4 350 K的分布情况吻合，确定放电电弧等离子体温度约4 300~4 400k，测量误差约100 K。

In this study, the traditional angular spectrum method of diffraction simulation is improved. By introducing band-with limitation, a new method is put forward, which is suitable for diffraction simulation both in far and near field.

本文对传统的角谱法衍射计算做出改进，通过引入带宽限制给出一种新的衍射计算方法，能同时兼顾近场和远场的衍射分布计算。

An anti-jamming algorithm for narrow-band interference in direct sequence spread spectrum systems ,which is based on the adaptive IIR notch filtering is introduced.

介绍了一种直接扩频系统中抗窄带干扰的自适应IIR陷波滤波算法。

Meanwhile, this paper analyzed and compared the frequency spectrum andintensity radiated of the 1/3 octave band of the tire tread patterns' noise whichwas measured from different direction in the laboratory, and find out that tirepatterns noise is similar to the sound of loudhailer and has strong directivity.

同时，本文还对在室内不同方位所测得的轮胎花纹噪声1／3倍频程的频谱图与直方图进行了分析、比较后发现轮胎花纹噪声的发声类似扬声器发声，有极强的指向性，一点测试会导致轮胎方案排队择优上的困难，为此，提出了一种全方位测定声级的方法，拟定了测试规范，实验证明行之有效。

Lines of tunable output are obtained, the energy of 18 lines is more than 10 J. In the rapidly trigging experiment, the tunable outputs of two random lines among the whole CO2 laser spectrum and two adjacent lines in the same transition band are realized respectively in 60 ms and 20 ms.

实验共得到85条调谐输出谱线，单脉冲能量超过10 J的有18条谱线；在动态快速触发情况下，分别在60 ms和20 ms内实现了整个CO2激光光谱范围任意两条谱线和同一个跃迁带内相邻两条谱线的快速调谐输出。

First, based on the measurements of absorption cross-section, the absorption characters of the main polluted gases in flue gas were deeply studied, and found that SO_2、 NO、 NO_2、 NH_3 had a character of approximate periods absorption at some wave band, which is a good chance of a new measurement introduced. Secondly, the factors about absorption cross-section of the gases measured, which affect on the measurement precision of DOAS, is studied deeply. The influence of pressure and temperature on absorption cross-section was given special research, and the compensated measures were given to the gases based on the character of the gases. Thirdly, in practical measurement, it must have been satisfied that the monochromator was consisted with the reference spectrum, which was based on absorption cross-section. In order to satisfy the consistency, the technique of reversion in the image was introduced, the reversions of spectrums were realized with wiener filter and noise elimination based on wavelet transform.

首先从吸收截面的测量入手，对烟气中主要的污染气体SO_2、NO、NO_2、NH_3的吸收特性进行详细研究，发现这些气体在局部区域具有准周期吸收特征，这为引入新的测量方法提供了契机；其次，对决定DOAS测量精度的被测气体吸收截面的诸多问题进行了深入研究，重点研究了压力、温度对被测气体吸收截面的影响，并针对被测气体的特征提出了相应的修正措施；再次，在实际测量中，要求所使用的光谱仪必须与以吸收截面为基础的参考光谱相匹配，为了满足匹配这一条件，文中将图像复原技术引入到光谱复原，使用维纳滤波和小波消噪实现了光谱的复原，将复原后的光谱与所使用光谱仪的仪器函数卷积，即可实现；最后，在对DOAS测量原理详细分析的基础上，对传统的最小二乘—差分吸收光谱法进行了详细的阐述，通过实验证实两点：1。

The experimental spectrum is composed of the central band and spinning sidebands denoted by an asterix.

实验频谱是由中央乐团及纺纱边指的阿斯特里克斯。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。