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一种定点快速标量乘算法的优化
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作者 殷新春 侯红祥 《计算机工程与应用》 CSCD 北大核心 2008年第4期80-82,共3页
标量乘法是实现椭圆曲线密码体制的瓶颈问题,利用NAF编码、预计算表法和Yen-Laih法分别在三个阶段对Lim-Lee算法进行优化,新的定点标量乘算法在赋值阶段动态扫描矩阵宽度为w的非全零列窗口,结合2kP底层域快速算法和扩充过的预计算表来... 标量乘法是实现椭圆曲线密码体制的瓶颈问题,利用NAF编码、预计算表法和Yen-Laih法分别在三个阶段对Lim-Lee算法进行优化,新的定点标量乘算法在赋值阶段动态扫描矩阵宽度为w的非全零列窗口,结合2kP底层域快速算法和扩充过的预计算表来提高计算效率。当位长是160时,新算法效率比Lim-Lee算法提高22.7%,192时提高23%,224时提高23.3%。 展开更多
关键词 ECC 定点标量乘 NAF编码 预计算表法 Yen-Laih
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Prediction and calculation for new energy development
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作者 Fu Yuhua Fu Anjie 《Engineering Sciences》 EI 2008年第2期69-77,共9页
Some important questions for new energy development were discussed, such as the prediction and calculation of sea surface temperature, ocean wave, offshore platform price, typhoon track, fire status, vibration due to ... Some important questions for new energy development were discussed, such as the prediction and calculation of sea surface temperature, ocean wave, offshore platform price, typhoon track, fire status, vibration due to earthquake, energy price, stock market’s trend and so on with the fractal methods (including the four ones of constant dimension fractal, variable dimension fractal, complex number dimension fractal and fractal series) and the improved rescaled range analysis (R/S analysis). 展开更多
关键词 new energy DEVELOPMENT PREDICTION fractal method rescaled range analysis R/S analysis)
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