能阶

由吸收光谱及荧光光谱定出了YbF3晶体中Yb~（3+）离子的斯塔克子能阶。

The Stark levels of Yb ~ ( 3 + ) in YbF_3 are designed by absorption and fluorescence spectra .

接著它们会自发性地放光而回到较低的能阶。

They spontaneously emit light to return to a lower level .

特别是他了解到原子在吸收光之后可以变成激发状态（也就是跳到较高的能阶）。

In particular , he realized that atoms can become excited-that is , jump to a higher energy level-if they absorb light .

他们之中没有人是技工；他们全是科学家，开口闭口都是量子能阶与频谱，而不是齿轮或者擒纵器。

There was not a mechanic among them ; these were scientists , and their conversations buzzed with talk of spectrums and quantum levels , not gears and escapements .

结果表明，提高f0和ζ都能使第一阶共振幅值降低而使高频幅值增加，但提高f0引起的变化更为显著；

The results show that increasing in f 0 and ζ will makes the amplitude in low frequency decrease and the amplitude in high frequency increase , but the change is more notable by increasing f 0 ;

对自由能求二阶偏导数得到的是线性效应系数；

The first order partial differential of Gibbs free energy are thermodynamics variable .

通过拓扑优化得到既满足刚度要求又能满足低阶振动频率要求的车架拓扑结构。

The optimized result could meet the stiffness requirement and the requirement of low frequency vibration .

能处理2阶到6阶的发电机模型和2种负荷模型。

The package can deal with three types of loads and generator models up to sixth orders .

我们也能使用一阶时态逻辑，为各种研究领域建立一些特定的形式系统。

We may also use the first-order temporal logic to set some specific formal systems for various fields of studies .

这些课程教导学生高等程式设计技巧，使其能撰写高阶且高效率的计算程式。

These subjects are excellent in developing advanced programming skills , allowing the students to develop highly efficient and advanced computer programs .

寻求一种既能提高高阶计算精度，又计算简便能满足工程要求的实用计算模型，以提高振动预报的精度，这对于高速船的设计计算是迫切需要的。

It is essential for the designer of the high speed ship to develop a relatively simple , accurate and practical calculation model .

提出一种能压缩三阶神经网络的互连张量规模近一半的紧致编码方法。

A compact-encoding method , which can reduce nearly the half size of the interconnection tensor in the third-order neural network , is proposed .

核自旋之间的各种各向异性相互作用都能用二阶张量表示，这些张量可分解成各向同性、对称以及反对称分量。

The various anisotropic spin interactions which can be represented by the rank two tensors are decomposed into isotropic , symmetric , and antisymmetric constituents .

本文提出了一种带有柔性附件的卫星的振动主动抑止方法，给出了能抑止任意阶振动谐波的条件。

This paper introduces a method of active vibration suppression control for spacecrafts with flexible appendages , and gives the conditions suppressing arbitrary numbers of harmonics .

基于能流二阶矩定义的横向光束宽度在传输过程中服从简单的双曲线变化规律。

The results reveal that both the transversal beam widths defined as second order moment of energy flux follow a very simple hyperbolic law upon propagation .

计算了不同吸附层能带带阶、厚度和表面势下的表面状态，研究了表面态与异质结构间的关联。

The surface states for different band offsets , width of absorbed layers , and surface potentials are calculated , from which the relationship between surface states and heterostructures is discussed .

本文利用二元函数和多元函数的分段低次插值方法，求出风压系数分布的插值函数，进而反映整个屋面的风压分布情况，此方法能避免高阶插值方法带来的“龙格”现象；

In this paper , piecewise low-order interpolation method of two-dimensional and multi-dimensional function is used to determine wind pressure distributions on the whole roof surface . This method can avoid " Runge " phenomenon of high-order interpolation .

本文我们还介绍了引入相互作用而导致的自旋波能谱低阶修正的理论结果，其磁化率与温度依赖关系在低温区与蒙特卡罗数值结果定量一致。

In this thesis , we also provide the results when the lowest-order correction of the spin-wave interaction to the energy spectrum are included . The temperature dependence of the static magnetic susceptibility agrees quantitatively with the quantum Monte Carlo .

非线性振动系统产生的二次频率耦合特征能用三阶累积量提取，三次频率耦合特征、双对频率耦合特征能用四阶累积量提取，高于三次的频率耦合特征的提取，未见报道。

Quadratic frequency coupling feature radiated by actual nonlinear vibration system can be extracted using third order cumulants . Cubic frequency coupling feature and pairing frequency coupling one may be extracted using fourth order cumulants . Much higher frequency coupling feature extraction isn ′ t studied now .

其定义既成为经典逻辑的语义学基础，广泛应用与能用一阶语言所表达的科学领域中的句子集中，同时定义本身也是运用一阶逻辑对概念进行分析的典范。

It becomes the semantic base of classical logic and the extensive application and practice of sentence centralization expressed by the first order language in scientific area ; at the same time , the definition itself is a mirror of analyzing conception by applying the first order logic .

该CAD能计算出n阶滤波器中各元件参数值，同时能自动绘制出幅频特性曲线。

The CAD can calculate all element values of n - order active filter . At the same time , it automatically outputs the graph of amplitude - frequency characteristic .

适当设置OTA的跨导值能实现任意高阶传输函数，且传输函数的系数可独立调整。

By properly setting the transconductance values of the OTAs , the arbitrary high order transfer functions can be realized , and coefficients are adjusted independently .

研究了FESS的特性，建立了飞轮及储能电机的五阶数学模型。

The characteristics of FESS are researched , the flywheel model and the fifth-order mathematical models of energy storage motor are established .

在激光核聚变（ICF）物理实验中，采用相干度较小的宽带倍频激光，能有效抑制高阶非线性效应和提高靶的激光辐照均匀性。

In the experiment of laser fusion , broadband lasers , which are weak interference , can effectively restrain high order nonlinear effects and smooth the radiation upon the target .

一种能同时获得模型阶次和参数的递推辨识算法

A new recursive algorithm for simultaneous identification of model order and parameters

不但能同时实现二阶高通滤波、低通滤波和带通滤波功能，还可以通过对输出端的直接组合，实现带阻和全通滤波功能及其他任意形式的二阶信号传输功能。

It also can obtain the functions of second-order notch and all-pass filtering by connecting the outputs together directly .

提出了振型定位法，这种方法能用少数低阶振型信息就可以对结构进行精确的定位。

Vibration mode-locating method was invented , which can locate the damage with low-level vibration mode information of the structure precise .

提出了一种新颖的电流模式电路，该电路在不改变内部结构的情况下既能实现双二阶通用滤波器，又能实现正交振荡器。

This article proposes a new current-mode circuit , which can function both as a universal filter and a quadrature oscillator without changing circuit topology .

仿真结果表明，即使对象增益可变或者未知，该控制器均能实现对给定阶跃信号的无静差跟踪。

The simulation results show that the given step signal can be tracked with zero steady-state error even the gain of the plant is variable or unknown .

通过增加一次投影测量，可以对输出结果作有效的提纯，使误差减至一阶小量，在某些情况下甚至能减小到二阶小量。

By introducing a measurement of projection , the error can be reduced to be a small quantity , or a second order small quantity in some particular cases .