有限差分算子的英文

• finite difference operator
• finite difference scheme

• "有限"英文翻译    limited; restricted; finite; ...
• "差分"英文翻译    difference
• "算子"英文翻译    operator
• "差分算子" 英文翻译 :    finite difference operator
• "差分算子表" 英文翻译 :    difference operator table
• "反差分算子" 英文翻译 :    inverse difference operator
• "后向差分算子" 英文翻译 :    backward difference operator
• "近似差分算子" 英文翻译 :    approximate difference operator
• "前向差分算子" 英文翻译 :    forward difference operator; forward-difference operator
• "一阶差分算子" 英文翻译 :    first difference operator
• "中心差分算子" 英文翻译 :    central difference operator
• "有限差分" 英文翻译 :    difference; finite; finite difference; finite-difference
• "有限差分法" 英文翻译 :    analysis by finite differences; calculus of finite differences; fdm; finite differeace approach; finite difference calculus; finite difference method; finite difference procedure; finite-difference method; finite-differenzen-verfahren finite-difference-method; method of finite differences
• "有限差分解" 英文翻译 :    finite difference solution; finite-difference solution
• "有限差分商" 英文翻译 :    finite-difference quotient
• "高阶有限差分" 英文翻译 :    higher-order finite difference
• "后向有限差分" 英文翻译 :    backward finite difference
• "积分有限差分" 英文翻译 :    integral finite difference
• "前向有限差分" 英文翻译 :    forward finite difference
• "时域有限差分" 英文翻译 :    finite-difference time-domain method
• "隐式有限差分" 英文翻译 :    implicit finite difference
• "有限差分逼近" 英文翻译 :    finite difference approximation
• "有限差分方程" 英文翻译 :    finite difference equations; finite-difference equation
• "有限差分分析" 英文翻译 :    finite-defference analysis
• "有限差分格式" 英文翻译 :    finite difference operator; finite difference scheme; finite differencing scheme

• In the thesis , the fundamental formula of ffd method derives from the square root that is approximated by a continued fraction expansion in the one - way wave equation . optimizations of the parameters of the finite - difference operator improve the validity of the method
  本论文用连分式近似单程波波动方程中的平方根导出ffd算法的基本公式，并对ffd算法中的有限差分算子进行了系数优化，进一步提高了计算的有效性。
• A hybrid migration method , named " fourier finite - difference migration " , is a post - stack depth migration scheme . the downward extrapolation operator is split into three operators : one operator is a phase - shift operator for a chosen constant background velocity , another operator is the well - known first - order correction term , and the third operator is a finite - difference operator for the varying of the velocity function . phase - shift downward extrapolation and finite - difference downward extrapolation preserves the advantage of phase - shift method and finite - difference method
  傅立叶有限差分(简称ffd )偏移算法是一种叠后深度偏移算法，其向下延拓算子是一种混合算子，包括三项：一项是处理常速的相移算子，一项是一阶相移修正算子，最后一项是类似45度方程的有限差分算子，用来处理剧烈横向变速。
• Author , secondly , starts from the approximate expandness of square root operator , perform mathematical calculations for finite difference operator in frequency - space domain , fourier finite difference operator in mixing domain ( frequency - space and frequency - wavenumber domain ) and general screen operator in mixing domain , compare and discuss their precision of their wavefield , adaptability for lateral velocity variations , computation efficiency and stability . thirdly , author , applies the steady variational reference slowness rytov approximation general screen wavefield extrapolation operator ( vrselrf ) in frequency - wavenumber domain , to the prestack and poststack forward modeling and depth migration
  第二，从平方根算子的近似展开出发对频率?空间域的有限差分算子、混合域(频率?空间域；频率?波数域)的fourier有限差分算子、混合域的广义屏算子进行了推导并对其波场描述精度、对横向变速的适应性、计算效率和稳定性进行了比较与评述。