Results 11 to 20 of about 9,719 (121)
South as a Sight ‘å—方’, from a branch to a necessity to World Literature
Journal of Research in Social Science and Humanities, 2023 In the discussion and debates on the world literature system, methodologies and methods is a topic that is valued. Moretti and Apter have prominent different opinions on the adoption of digital or abstract data outside texts and contexts. The way Moretti views the world literature system is highly based on historiography and studies of the Annual ...
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A rate control method based on wavelet transform(一种基于HVS的码率控制方法)
Zhejiang Daxue xuebao. Lixue ban, 2001 本文在小波分解图像的不同级上采用不同长度的滤波器以消减“振铃”效应，然后重新组织小波系数成小波块，根据每个小波块所含能量的多少给其分配不同的码率.最后根据人体视觉系统(HVS)的特点，提出了一种码率控制方法.
LIUJiu-fen(刘九芬) +1 more
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Dyadic affine wavelet packet(二进仿射小波包)
Zhejiang Daxue xuebao. Lixue ban, 2002 自从小波包概念提出以来,关于这一方面的研究吸引了许多数学家的兴趣.到目前为止,在L2(RS)中关于正交与非正交小波包、可分与非可分小波包的研究已取得丰硕的成果,其中S是一给定的自然数.CHUI和LI在R上有界一致连续函数空间上引入了插值多分辨分析的概念并给出了这一空间函数的二进仿射小波分解.本文在这一空间引入并利用泛函小波变换研究了二进仿射小波包,对这一空间的任一函数,给出了逐点收敛的二进仿射小波包分解.
LIYun-zhang(李云章) +1 more
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Interpolating wavelet method for solving nonlinear partial differential equations(解非线性偏微分方程的插值小波算法)
Zhejiang Daxue xuebao. Lixue ban, 2007 利用集小波分解和分形压缩变换思想构造了与标准小波具有类似尺度特点的连续插值小波基，给出了一维和二维空间中的插值型小波函数例子.利用集小波分解集和基函数的插值性质获得了由集小波分解点确定的积分公式，使非线性部分计算量由随尺度的平方增长关系变为线性增长关系.为说明方法的可行性，最后结合Newton迭代法给出了一个数值例子.
ZHUJing-fen(朱静芬) +1 more
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Dizhen xuebao, 2020 基于离散小波变换理论，对长江三峡及邻区的布格重力异常进行多尺度分解，获取局部场、区域场和1—4阶小波细节。结果显示：4阶小波细节中，秦岭—大别造山带东西向正异常与扬子地块和秦岭—大别造山带之间的相互作用相关；M3.0以上地震大多位于区域场东向突出部位，即2阶和3阶小波细节所反映的负异常区，另有小部分位于4阶小波细节所反映的黄陵背斜正异常西侧，这种现象可能与黄陵背斜新构造运动相关。
Ji Li, Jing Xiong
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Preliminary Report on the Westerly Waves in the Southern Ocean
Antarctic Record, 1961 暴風圏の偏西風帯では,長波や短波の波動のほかにそれ等よりも規模の小さい気圧波があるらしい.以下,この波動について若干知りえた点を個条書きにしてあげてみる.1.この小波動は,気圧の谷や峯の小規模なものらしく,又,東進性をもっている.2.この小波動をみつけるには,島や船からの報告から気圧の変化曲線をつくり,そのキンクによって谷や峯を探せばよい.3.この小波動は南緯50～60度の間で,はっきり見付けられるようである.4.南大洋にブロック気味の高気圧がある時,この波動の東進に伴って南板前線上にも気象変化が生じ ...
Narimasa TAJIMA
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Gaoya dianqi, 2021 为增强局部放电信号白噪声去噪算法的自适应能力,文中提出了一种自适应选择小波、分解层数与阈值的局部放电去噪算法。首先,在对信号进行逐层小波分解的基础上,以近似系数能量占比表征小波的能量特点,以小波能量熵表征信号波形分布特点,以二者比值作为每层分解最优小波的评价指标,选取比值最高的小波为最优小波,兼顾了信号的能量特点与波形分布特点;其次,对细节系数进行噪声白化检验,当细节系数不满足白化标准时停止分解,自适应地选择分解层数,降低了去噪误差;最后,用鲸鱼优化算法优化了阈值选取过程,同时提高了阈值精度与运算速度 ...
米翰宁, 王昕, 任广振, 郑益慧
doaj
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Deep skin infections and dense biofilm barriers caused by Propionibacterium acnes (P. acnes) remain significant challenges in recurrent acne vulgaris, exacerbated by the poor stratum corneum penetration of conventional therapies and rising antibiotic resistance.
Bingran Qi +3 more
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT High‐entropy oxides (HEOs) are promising for microwave absorption but suffer from a trade‐off between impedance matching and attenuation, often requiring high filling ratios (> 50 wt%). Herein, we propose a “lattice‐spin” dual‐regulation strategy by introducing giant‐radius Bi into a single‐phase HEO solid solution.
Junwei Zhang +11 more
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Electromagnetic wave absorption materials require high dielectric loss and excellent impedance matching performance. However, current conventional biomass‐derived electromagnetic wave absorption materials are still limited by low electrical conductivity and a single structure.
Yue Zhang +9 more
wiley +1 more source