谱

Considering the spectrometer with an array detector,a Gaussian-shaped calibration spectral line's integral sampling model is set up.The condition on which the peak position changes upon the impact of the detector spectral response is studied.And the limitation for the detector spectral response not to shift the peak position to another pixel is given.The limitation's mathematical expression for a spectrometer with a grating is deduced.

为此，针对采用阵列探测器的光谱仪器，建立了以高斯线型为标定谱线轮廓的模型，分析了谱线在探测器上经光谱响应调制及积分抽样后峰值位置发生移动的情况，给出了保证在峰值位置不偏移的情况下探测器光谱响应需满足的条件，特别给出了当仪器分光元件为光栅时，在该条件下结合仪器参数的表达式。

When the CDOM concentration ρ≥150mg/L, the excitation and emission wavelengths in the SFS spectrograms moved blue with decreasing CDOM concentration, and the SFS spectral shapes also changed; when ρ50mg/L, the excitation and smission wavelegths in the SFS spectrograms didn't move, and the SFS spectral shapes were invariant, but the fluorescence intensity decreased with decreasing CDOM concentration.

不同质量浓度CDOM水溶液的SFS显示，当质量浓度ρ≥150mg/L时，随着质量浓度降低，激发和发射波长也向短波长方向移动，其谱形也发生变化；当ρ50mg/L时，激发和发射波长不发生漂移，谱形不变，荧光强度随质量浓度降低而降低。

Compared with other methods of the same kind, this method has a lower dependence on the quality of spectral line extraction.

与现有的基于谱线匹配的方法相比，该方法对谱线提取效果的依赖程度较低。

The influence of the spectral line intensity in various laser power density and direct electricity field is studied.

研究了激光功率密度和直流电场对各谱线强度的影响，分析了谱线半高全宽与外加电压。

The frequency spectrum is composed by not the continual spectral line,each spectral line represents a harmonic component.

频谱是由不连续的谱线组成，每条谱线代表一个谐波分量。

Compared with Burg algorithm, this method has the advantages of less bias in the frequency estimation and being absent of spectral line splitting.

与Burg算法相比，该方法的优点是谱峰偏移程度较低，且不存在谱线分裂现象。

Order spectral technique. Non-Gaussian AR model was employed for the analysis and classification for PCG signals.

本文利用高阶谱分析方法，提出以非高斯参数模型对心音信号进行双谱分析与分类。

In order to test spectral element method and Newmark time integral, the codes of program and the feasibility of spectral element method for aeroacoustics, One question which has analytical solution and two typical questions of computational aerocaustics are simulated numerically by the program.

为了验证谱元方程和Newmark时间积分方法的正确性、自己所编程序代码的有效性以及谱元方法求解气动声学问题的可行性，本文使用程序分别求解了具有解析解的波动方程和计算气动声学问题中的两个典型问题。

Methods Based on the modern spectral estimation method, a modified Levison′s algorithm was proposed to simulate the radar clutters of typical correlated power spectral characteristics and estimate the order of corresponding AR model.

方法用基于现代谱估计方法，提出了一种修正的Levison算法，并对典型相关功率谱特性的高斯杂波及其AR模型的阶数进行了计算机仿真和估算。

Modem spectral estimate is generally used to process the random signal. But only stationary Gaussian signal can be processed by this method. Using the higher order spectral analysis can overcome these defects.

处理随机信号通常使用现代谱估计方法，但是这种方法一般只能处理平稳的高斯信号，使用高阶谱分析可以克服这些缺陷。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐