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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
For modular representations the ring of invariants usually fails to be Cohen-Macaulay and computing the depth is often very difficult.
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In particular, we prove an integral formula for the degree of an ample divisor on a variety of complexity 1, and apply this formula to computing the degree of a closed 3-dimensional orbit in any SL2-module.
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Computing invariants of reductive groups in positive characteristic
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This paper gives an algorithm for computing invariant rings of reductive groups in arbitrary characteristic.
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We present an algorithm for computing the invariant field k(X)G.
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| | In this paper the information transmitting rate of delta-modulation (△M) system is discussed and compared with PCM system. It points out that the principal way of increasing the information rate is to decorrelate the modulating signal. The formulae of computing the signal-to-noise ratio of single integration and double integration delta-modulation systems are given. The signal-to-noise ratios and thier relations to pulse repetition frequency for both systems are calculated with typical modulating sign... | | 本文将△调制与脉码调制进行了对比,讨论了信息率,并指出提高信息率的主要方向是解除信号前后的相关性;给出了计算一级和两级积分△调制系统的信噪比的公式;通过典型调制信号计算了信噪比及这个比值与脉冲重复频率的关系,并将所得结果与脉码调制作了比较;文中对两种调制系统中的压缩扩张问题提出具有实践意义的意见;从信息论的观点评论了△调制系统。 | | 文摘来源 | | In this paper a time-saving program for computing the Fast Fourier Transform without reordering of address is derived. In seismic data processing, the timedependent frequency filter method introduced here uses about the same calculating time as the recurrence filter method, but gives better results. In the two-dimensional wave filter problem, we decompose the Fourier Transform into positive velocity and negative velocity components, thus making it possible to decompose a cross-hatch wave into positi... | | 本文推出不倒地址的快变计算公式,提出编制节省计算时间程序的方法,在地震数字处 理中使用频域时变滤波方案实际计算时间与时域递归滤波相当。对二维滤波讨论了正负速度 区别解决了时域滤波产生坑席现象的问题,计算方法比时域滤波统一,简单,计算时间省。 提出的频域反滤波方案也比时域反滤波计算简单时间省。 | | 文摘来源 | | In this paper a program for computing the Fast Walsh Transform without reordering of address is derived. Applications of Fast Walsh Transform to seismic data processing are given to solve the sequency band filter problem and the two-dimensional filter problem. | | 本文推出不倒地址省时间的快速沃希变换计算公式,提出使用沃希变换进行地震勘探数字处理滤波的方法以及二维沃希变换滤波方法。 | | 文摘来源 | |   | | << 更多相关文摘 |
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