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域运算
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  “域运算”译为未确定词的双语例句
     Research on Finite Field Arithmetic and Scalar Multiplication of Elliptic Curve Cryptographys
     有限域运算和椭圆曲线数乘运算研究
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     Optimizing Binary Field Arithmetics on DSP
     二进制域运算在DSP上的优化
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     A new operational amplifier macromodel of nonlinear in time-domain
     一种新的非线性时域运算放大器宏模型
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     In this paper, we simply introduce the RS code structure, analyze RS code encoding/decoding arithmetic, realize fast operation in finity field by using look-up tables method, and use Berlekamp-Messey algebiaic decoding algorithm.
     本论文简要介绍了RS码的结构,分析了RS码编译码算法,使用查表法实现快速的有限域运算,采用Berlekamp-Massey代数译码算法。
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     The finite field arithmetic, elliptic curve scalar multiplication and the related algorithms are investigated in this dissertation.
     本文主要研究有限域运算算法和椭圆曲线数乘运算算法。 全文在强调作者所取得研究成果的同时给出了有限域运算理论和椭圆曲线密码体制理论的基本框架。
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  相似匹配句对
     Optimizing Binary Field Arithmetics on DSP
     二进制运算在DSP上的优化
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     Searle Operations Over GF(2~2)
     GF(2~2)的Searle运算
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     John Domains
     John
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     Moral Operation
     道德运算
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     NON-IDEAL OPERATIONAL AMPLIFIER
     非理想运算放大器
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  the field operations
During the implementation of the project, however, concern for farmer input and participation should have been incorporated more systematically into the field operations of the regional teams.
      
For consistency, theprobability measures must assume values in the finitefield and obey the field operations.
      
Using the field operations we construct an analog of the differential calculus having the property that the result of every operation is bounded.
      
Combining these images with the present GIS mine location data sets provide for quick screening and will add efficiency to the field operations.
      
Diseases are playing an ever increasing role in the field operations.
      
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The Chrestenson transforms in:the p-va1ued (p>1, integer) 1ogic domain are introduced based on the Chrestenson transforms of p-valued 1ogic funct ions. Thc calculation of these transforms is simple and fast, and it needs fewer memories vi a-coinputpr..-7he paramPter spectruhi which cons ists of p parameters from the transforms is of definite significauce and may be interpreted as a tneasure of correla- t ion with 1 inear logic funct ions. So, the parameter spectrum gives informat ion for the des ign 0f P-va1ued...

The Chrestenson transforms in:the p-va1ued (p>1, integer) 1ogic domain are introduced based on the Chrestenson transforms of p-valued 1ogic funct ions. Thc calculation of these transforms is simple and fast, and it needs fewer memories vi a-coinputpr..-7he paramPter spectruhi which cons ists of p parameters from the transforms is of definite significauce and may be interpreted as a tneasure of correla- t ion with 1 inear logic funct ions. So, the parameter spectrum gives informat ion for the des ign 0f P-va1ued networks us ing spectra1 techniques, and is appl icab1 e to the logic design, tLreshold logic and c1ass if icat ion of mu1 t iple-valued logic funct ions. Seven spectral operations are presented in the paper, the methods of the class if icat ion of logic fuPct.ions using parameter spectrum are giYen, and the example for the design of mu1t iple-va1ued logic networks using spectra1 operations is ment ioned.

本文在p(p>1,整数)值逻辑函数的奎斯特恩逊变换基础上,导出了定义在p个逻辑值域上的奎斯特恩逊变换。这种变换计算简单、速度快、节约计算机存贮单元。由这种变换得到的p个参量表示的参量谱具有明确的意义,它显示了逻辑函数对各线性函数的相关程度,从而为采用谱技术设计多值网络提供了有用的信息。因此,这种参量谱可用于多值逻辑中的网络综合、阈门逻辑和函数分类。本文归纳了七种参量谱域基本运算,提出了按参量谱对逻辑函数进行分类的原则,给出了采用谱域运算技术设计多值逻辑网络的例子。

When a signal is in minimum phase, its amplitude spectrum and phase spectrum will satisfy Hilbert transform condition. Having known the amplitude spectrum of a non-minimum phase signal, we can conduct Hilbert transform to extract a minimum phase signal of which the amplitude spectrum is identical with that of the non-minimum phase signal. This paper recommends a method for directly converting logarithmic amplitude spectrum into minimum phase spectrum by Hilbert transform in time domain. Parzen's window function...

When a signal is in minimum phase, its amplitude spectrum and phase spectrum will satisfy Hilbert transform condition. Having known the amplitude spectrum of a non-minimum phase signal, we can conduct Hilbert transform to extract a minimum phase signal of which the amplitude spectrum is identical with that of the non-minimum phase signal. This paper recommends a method for directly converting logarithmic amplitude spectrum into minimum phase spectrum by Hilbert transform in time domain. Parzen's window function is used to reduce the truncation effect of Hilbert factor and speed up convergence because parzen window frequency spectrum has neither side lobes nor"missing" problem. This method is characterized by combined operation in frequency domain and time domain. Taking RDS-500 computer as an instance, the combined operation time is half of the time taken when the operation is only conducted in frequency domain. Knacks for making minimum phase spectrum in different cases are illustrated in this paper. The only difference between the amplitude spectrum of seismic record and that of source wavelet is a constant coefficient when the reflection coefficient series is white noise series, In this case, the amplitude spectrum of seismic record can be used as substitute for the amplitude spectrum of source wavelet, then the minimum phase spectrum of source wavelet can be obtained using the method recommended in the paper. A mixed phase signal input also can be transformed into minimum phase signal in this way.

当一个信号为最小相位时,其振幅谱和相位谱符合希尔伯特变换关系。对一个非最小相位信号,在已知它的振幅谱之后,可以通过希尔伯特变换求出一个与之具有相同振幅谱的最小相位信号。本文讨论一种直接将对敷振幅谱在时间域作希尔伯特变换求取最小相位谱的方法。为了减少希尔伯特因子的截断影响和加快收敛,应用帕曾(Parzen)窗函数镶边。因为帕曾时窗函数的频谱没有旁瓣,也不存在泄漏问题。此法的特点是一种既在频率域又在时间域进行混合运算的方法。以RDS-500计算机为例,此法的运算时间要比全部在频率域的运算时间减少一倍。文中列举了几种不同情况下提取最小相位谱的方法。当反射系数序列为白噪序列时,地震记录的振幅谱与震源子波的振幅谱只差一个常数,这时可用地震记录的振幅谱代替震源子波振幅谱,再用文中提出的方法,求出震源子波的最小相位谱。当输入的是一个混合相位信号,也可以采用本文提出的方法转换成最小相位信号。

Converting dip reflector time to the corresponding horizontal reflector time is called DMO correction.The DMO method is conspicuous because it takes less time than prestack migration but obtains the geologic effect which is as good as that of prestack migration in a complicated area.The DMO method can be performed in time domain or in frequency domain; and in the time domain, both the integral method and the difference method can be used.The theory and practice show that the integral DMO in time domain has some...

Converting dip reflector time to the corresponding horizontal reflector time is called DMO correction.The DMO method is conspicuous because it takes less time than prestack migration but obtains the geologic effect which is as good as that of prestack migration in a complicated area.The DMO method can be performed in time domain or in frequency domain; and in the time domain, both the integral method and the difference method can be used.The theory and practice show that the integral DMO in time domain has some advantages; easy operation, flexible application and less operation amount.The operation time will be largely reduced when a good control of dip γ(T_0,x) is made in the integral DMO method.

把倾斜界面反射时间校正到相应的平界面反射时间的过程就叫做DMO。DMO法目前普遍受到人们的重视,因为它比叠前偏移节省机时,而且在复杂地区有可能获得相当于叠前偏移的地质效果。DMO的实现方法有时间域运算与频率域运算的区别,时间域运算中又有积分法与差分法的不同。本文通过理论分析和具体处理步骤的对比,说明了时间域积分法DMO运算简便易行,应用灵活,而且运算量少。如果能灵活掌握好时变、空变的倾角γ(T_0,x)则可能使积分法DMO运算时间大幅度地减少。

 
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