查询词典 spectral

A new multi-stage vector quantizer of line spectral frequency parameters is designed.

设计了一种新的线谱频率参数多级矢量量化编码方案。

The boardening of the spectral line in the spectrum when the helix stucture is perpendicular to the atomic be...

观察了螺旋线慢波结构轴与原子束垂直放置时波谱中谱线的增宽，并进行了讨论。

First, the reason behind the negative data is analyzed and a nonnegative constraint is imposed on the classic PCA. Then a set of nonnegative linear independence weight vectors of principal components is obtained, by which a low dimensional space is constructed. Finally, a nonlinear optimization technique is used to determine the projection vectors of the high-dimensional multi-spectral data in the constructed space.

首先分析主成分分析法产生非光谱数据的原因，据此对经典主成分分析模型增加非负约束；然后求出一组线性无关的非负主成分权向量，用该组向量构造低维空间；最后用非线性优化技术确定高维数据在该低维空间中的投影值，实现了高维空间与低维空间的相互转换。

Then through solving that equation, a set of nonnegative linear independence weight vectors of principal components was obtained, by which a low-dimensional spectral space was spanned.

针对经典主成分分析法进行多光谱图像数据降维会使重构光谱反射比出现负值的问题，提出一种非负主成分分析法，并用该法构造低维光谱空间，实现高维多光谱数据与低维光谱空间的转换。

A FDTD program was written and the electromagnetic fields for various polarized incident beams are calculated and the polarization states of the diffractive waves are extracted. The relation between the polarization state of the diffraction wave and the grating balzed angle and polarization angle for the linearly polarized incident wave is analyzed; In the spectral range of 1530 ~ 1570nm, the polarization dispersion is studied for the linearly and circularly polarized incident beam.

用时域有限差分程序计算出任意偏振方向线偏光经过闪耀光栅衍射后的电磁场分布，提取衍射波的S偏振和P偏振分量，分析它们与光栅闪耀角和入射光波偏振角的关系；分析在1530 -1570nm光谱范围内，入射光波为线偏振波和园偏振波时，衍射光波的偏振色散特性与光栅闪耀角的关系。

The reduction of spectral linewidth from 6 nm to 0.8 nm is achieved in our experiments.

实验实现了激光器的线宽由6 nm到0.8 nm的压缩。

This type of devices are required to have high-speed, high quantum efficiency and ultra-narrow spectral linewidth simultaneously.

这类器件需要同时具备高速、高量子效率、超窄光谱响应线宽的性能。

In chapter 2, the effects of the linewidth, spectral distribution and amplitude-or phasemodulation of the light-source are analyzed in detail.

对腔的损耗、入射光频宽和扰动影响大小作了分析比较，并给出这一分析的定量表达式。

The change of spectral linewidth is more sensitive to the effect of external reflection coefficient than the external cavity length.

外腔反射率对光谱线宽的影响要比外腔腔长灵敏得多。

The polarization and magnetic rotation in highly nonlinear photonic crystal fibers were investigated by frequency multiplication method based on the principle of magneto-optical modulation, joining with Lissajous figure method, and by investigating temperature characteristic and spectral characteristic.

运用基于磁光调制原理的倍频法，结合利萨如图形方法，并通过温度特性和光谱特性的考查，对高非线性光子晶体光纤的偏振效应、磁旋光效应进行了实验研究。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。