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波前     
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  wavefront
     Finally,wavefront error of the objective is 0.11λ(λ=0.6328μm) .
     最终物镜的波前误差达到0.11λ(λ=0.6328μm)。
短句来源
     · RESULTS: The degrees of myopia measured with wavefront aberration analyzer, autorefraction and phoropter were -6.18±2.77,-5.80±2.80,-5.88±2.72D respectively.
     结果:波前像差仪、自动验光仪、综合验光仪3种方法测得的球镜度数分别为-6.18±2.77,-5.80±2.80,-5.88±2.72D;
短句来源
     Fourier optics analysis of Hartmann Shack wavefront sensor
     Hartmann-Shack波前传感器的Fourier光学分析
短句来源
     The wavefront aberrations of human eyes at 3.1mm, 5.2mm and 6mm pupil diameters are measured by Hartmann-Shack human eye aberrometry.
     采用Hartmann-Shack人眼像差仪,测量了人眼在3.1mm,5.2mm和6mm瞳孔直径下的波前像差。
短句来源
     Results: 1. In myopic eye, RMS value of total wavefront aberration is 0.7361±0.4782um and RMS values of high-order aberration is 0.3963±0.2484um.
     结果:1.眼整体波前像差RMS值为0.7361±0.4782um,高阶像差RMS值0.3963±0.2484um;
短句来源
更多       
  wave front
     Finally,wavefront error of the objective is 0.11λ(λ=0.6328μm) .
     最终物镜的波前误差达到0.11λ(λ=0.6328μm)。
短句来源
     · RESULTS: The degrees of myopia measured with wavefront aberration analyzer, autorefraction and phoropter were -6.18±2.77,-5.80±2.80,-5.88±2.72D respectively.
     结果:波前像差仪、自动验光仪、综合验光仪3种方法测得的球镜度数分别为-6.18±2.77,-5.80±2.80,-5.88±2.72D;
短句来源
     Fourier optics analysis of Hartmann Shack wavefront sensor
     Hartmann-Shack波前传感器的Fourier光学分析
短句来源
     The wavefront aberrations of human eyes at 3.1mm, 5.2mm and 6mm pupil diameters are measured by Hartmann-Shack human eye aberrometry.
     采用Hartmann-Shack人眼像差仪,测量了人眼在3.1mm,5.2mm和6mm瞳孔直径下的波前像差。
短句来源
     Results: 1. In myopic eye, RMS value of total wavefront aberration is 0.7361±0.4782um and RMS values of high-order aberration is 0.3963±0.2484um.
     结果:1.眼整体波前像差RMS值为0.7361±0.4782um,高阶像差RMS值0.3963±0.2484um;
短句来源
更多       
  wave-front
     Application of BICGSTAB algorithm in wave-front reconstruction and control
     BICGSTAB算法在波前重构和控制中的应用
短句来源
     The results obtained show that the impulse corona stabilization and breakdown voltage depend on the SF_6 content and the wave- front duration,but are almost independent of the wavetail duration.
     实验结果表明,冲击电晕稳定与击穿电压决定于SF_6含量及波前时间,几乎与波尾时间无关.
短句来源
     The wavefront aberrations of human eyes for 6mm pupil were measured with the Hartmann-Shack wave-front sensor,and Modulation Transfer Function(MTF) and Strehl ratio were computed from the wave-front aberrations.
     利用Hartmann-Shack波前传感器人眼像差仪测量了正常人眼6mm瞳孔的波前像差,由波前像差计算出人眼光学系统的光学调制传递函数MTF和Strehl比率,并由MTF和视网膜空间像调制度AIM曲线计算出人眼视锐度和对比敏感度函数CSF。
短句来源
     Implementation Methods for Wave-Front Division in Maskless Laser Interference Photolithography
     波前分割无掩模激光干涉光刻的实现方法
短句来源
     Irradiated by a continuous wave (CW) DF laser with power of ~30 kW, wavelength of 3.8 μm, and irradiation time of 1 s, under the conditions of the laser beam approximately perpendicular to the coaxially rounded reflector, the thermal distortions of 3.8/0.633 μm dual-wavebands multi-layer high-power laser reflectors manufactured by different crafts are tested by a Shack-Hartmann wave-front sensor.
     以功率约为30 kW,中心波长为3 8μm,出光时间为1 s的连续DF化学激光器作为抽运源,在抽运光共轴近正入射于圆形反射镜条件下,利用夏克哈特曼(Shack-Hartmann)波前传感器,对不同工艺条件下镀制的3 8/0 633μm双波段多层膜强激光反射镜的热畸变量进行了检测.
短句来源
更多       
  front wave
     The monotone and oscillatory front wave solutions in a class of reaction-diffusion equations is studied .
     本文讨论一类反应扩散方程的单调波前解及振荡波前解的存在性;
短句来源
     A series of sufficient conditions to guarantee the existence of front wave solutions are obtained.
     在各种条件下,得到一系列保证波前解存在的充分条件。
短句来源

 

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  wavefront
Using techniques from microlocal analysis, we study the problem of recovering the wavefront set of $\mbox{curl}(F)$ from that of the restricted Doppler transform of $F$.
      
In this paper, traveling wavefront solutions are established for two cooperative systems with time delay and non-local effects.
      
Conditions Causing Wavefront Instability in a Growing Colony of Bacterial Cells with Chemotactic Activity
      
A comparative analysis of the results of physical [1-4] and mathematical experiments [5-8] is used to elucidate the mechanism of additional pressure lift at a Mach wavefront.
      
A model of signal propagation is proposed that enables one to estimate this effect at signal wavefront durations much less than the propagation time.
      
更多          
  wave front
A study is made of the velocity field induced by the motion of a thin wing and an incident pressure wave of finite extent with variable gas parameters behind the wave front.
      
Structure of a shock-wave front in water-saturated soil
      
We consider the gas state behind a shock wave front in air with a velocity v≥10 km/sec.
      
The pressure field in the water is a toroidal compression wave with gradually increasing pressure behind the wave front.
      
Nonequilibrium ionizatlon of air behind a shock wave front at speeds of 5-10 km/sec
      
更多          
  wave-front
Wave-front reconstruction by geometric-optical reflection of the reconstructing radiation from interference surfaces of a structure recorded in the bulk of a medium by counterpropagating laser pulses is observed.
      
Topological reactions in the beam wave resulting in the sign inversion of the optical vortex upon the intersection of the wave-front edge dislocation are considered.
      
On the possibility of compensating for small-scale wave-front distortions using a Zernicke cell and an optically controlled spat
      
The possibility of compensating for small-scale wave-front distortions using a spatial light modulator which is optically controlled by the output beam of a Zernicke interferometer was studied theoretically.
      
Implementation of the method is based on a series of eye aberration measurements taken at different angles to the optical axis by means of a wave-front sensor.
      
更多          
  front wave
The AdS/CFT correspondence between conformal field theory and string states in an extended space-time has provided new insights into not only hadron spectra, but also their light-front wave functions.
      
This connection allows one to predict the form of the light-front wave functions of mesons and baryons, the fundamental entities which encode hadron properties and scattering amplitudes.
      
A number of applications of light-front wave functions are also discussed.
      
We discuss the relation between the two-nucleon Bethe-Salpeter amplitude and the light-front wave functions.
      
Quantum Light-Front Wave Function in a Scalar Yukawa Model
      
更多          
  其他


The wave eguation for the motion of an electron in the static field of lithium atom is solved by numerical method for electron energy up to 340 volts. The wave functions found in this papor are required in the calculation of collision probabilities. The zero, first and second order phases of the wave functions are plotted against the k values for the incident electrons, the distortions are much greater in the field of the lithium atom than in the field of helium atom. The first and second order phases, which...

The wave eguation for the motion of an electron in the static field of lithium atom is solved by numerical method for electron energy up to 340 volts. The wave functions found in this papor are required in the calculation of collision probabilities. The zero, first and second order phases of the wave functions are plotted against the k values for the incident electrons, the distortions are much greater in the field of the lithium atom than in the field of helium atom. The first and second order phases, which were practically negligible in the field of helium atom, are much greater in the field of lithium atom, and are comparable with the zero order phases at the higher velocities.

本文用数字计算法算出了电子在正常态锂原子场中运动的畸变波函数,电子的投射能量由零算到340伏特.同时也算出了电子波的前三次调和项的位相移动一速度曲线.

The diffracted field of a sound pulse source in a moving stratified medium, in which a shadow zone may be formed, has been studied theoretically. The fundamental equation is reduced to an inhomogeneous linear differential equation of second order by a mixed integral transform, and the solution is expanded into a series of normal modes. Following the method developed by Friedlander, asymptotic expressions of eigen value and eigen functions are derived from Langer's asymptotic solutions. The approximate formula...

The diffracted field of a sound pulse source in a moving stratified medium, in which a shadow zone may be formed, has been studied theoretically. The fundamental equation is reduced to an inhomogeneous linear differential equation of second order by a mixed integral transform, and the solution is expanded into a series of normal modes. Following the method developed by Friedlander, asymptotic expressions of eigen value and eigen functions are derived from Langer's asymptotic solutions. The approximate formula of the field near the diffracted front is obtained for the observing points far inside the shadow boundary. Based on this formula, the establishing process and the attenuation with horizontal distance of field are discussed respectively. These relations are strongly dependent upon the boundary condition and the situations of source and receiver.

本文研究了作定常无旋运动的分层介质中形成影区条件下一δ型脉冲点声源的衍射场.用混合积分变换将运动介质声学基本方程化为一非齐次线性二阶常微分方程,并将它的解展开成各阶简正波之迭加;运用Friedlander所发展的方法由Langer渐近解求出本征值和各本征函数的渐近表式;对于深入影区边界之内的观察点得到了波前附近场的渐近表式.根据这一表式讨论了场随时间的建立过程和随水平距离的衰减关系.这些关系强烈地依赖于边界条件以及声源和接收点是否位于界面上这一情况.

In this article a variational principle for three-dimensional transonic steady relative flow with embedded shock waves in a turbomachinery impeller of axial-, radialor mixed- flow type is developed. Its special feature is to take full advantage of the natural boundary conditions and 'the artificial internal boundaries' so as to facilitate the handling of the very complex boundary conditions of various kinds. As a result, all boundary conditions in the problem under study have been converted into natural ones....

In this article a variational principle for three-dimensional transonic steady relative flow with embedded shock waves in a turbomachinery impeller of axial-, radialor mixed- flow type is developed. Its special feature is to take full advantage of the natural boundary conditions and 'the artificial internal boundaries' so as to facilitate the handling of the very complex boundary conditions of various kinds. As a result, all boundary conditions in the problem under study have been converted into natural ones. Moreover, it is also shown that by taking variations of the position of the unknown flow discontinuities (such as shock waves, free trailing vortex sheets and other free stream surfaces) all matching conditions across these discontinuities, including the well-known Rankine-Hugoniot shock relation, can be derived from the variational principle as natural internal conditions.This article is primarily intended to provide, in cooperation with the discontinuous finite element [5], a theoretical foundation for developing a new computational method, which allows all flow field discontinuities to be captured out automatically and clearly (without smearing). Owing to the assumption of the existence of a velocity potential, the applicability of the present theory is limited to cases with Mach numbers before the shock not too larger than 1. The variational principle presented herein is a generalized one of those developed previously in [9].

本文建立了通用于轴流式、径流式及混流式叶轮机旋转叶轮内含激波的跨声速三元相对定常流动的变分原理。文中力图充分发挥自然边界条件和‘人工分界面’的独特作用,除将所有边界条件全部化为自然边界条件外,还把内部各种未知间断面位置也进行变分,从而导出了这些间断面上的自然边界条件,其中包括激波面上的Rankine—Hugoniot条件和自由尾涡面上的切向间断条件。本文的主旨是试图与间断有限元结合,探索一条能够自动地、清晰地求解出流场内各种间断面(包括激波面、叶后自由尾涡片以及自由射流边界面)的新途径。由于引用了位函数,所以本文结果要求对激波前马氏数有一定限制。在附录中,指出了泛函的变域变分与雷诺输运定理的类比性,并据此导出了泛函的变域变分的普遍公式。

 
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