Results 61 to 70 of about 15,266 (166)
Shuitu Baochi Xuebao, 2011 运用土壤粒径质量分布原理与分形理论,研究泥石流频发区蒋家沟3种不同盖度草地土壤粒径分形特征。结果表明:不同盖度草地的土壤粒径分布具有不同的分形特征,其分形维数在2.520 8～2.669 1之间,其关系为:低盖度草地>高盖度草地>中盖度草地 ...
谢贤健, 韦方强
doaj
Compression and simplification of CRM type decomposition map(CRM分解图的压缩及其化简)
Zhejiang Daxue xuebao. Lixue ban, 2006 CRM分解图可以用来指导超大规模集成电路的设计和化简.本文在分析应用CRM分解图进行逻辑函数或-符合式化简的基础上提出了逻辑函数的降维CRM分解图，给出了降维CRM分解图的定义和图形化简方法.实例表明，该图形方法有直观、简单等特点，它能给出逻辑函数的最简或-符合式，使电路实现比传统设计更简单、更有效.
ZHAOMei-ling(赵美玲) +2 more
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Policy &Internet, Volume 17, Issue 2, June 2025.Abstract The spread of false and misleading information in digital communication spaces has enormous potential for harm in democratic societies, but has so far been insufficiently addressed by policy makers. This problem has been exacerbated by recent technological developments such as deepfakes.
Olivia Hägle +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 选取14个关中平原高速公路路堤边坡样地,分析了不同植被恢复年限下土壤水稳定性团聚体特征.结果表明:(1)随年限延长,＞1 mm大团聚体表层含量基本大于亚表层含量;＜1 mm团聚体则相反;＜0.25 mm微团聚体含量呈现出先增大后又减小的趋势,而＞5 mm团聚体含量则先减小后增大.(2)研究区阳面边坡分形维数为2.45～2.79,阴面边坡分形维数为2.48～2.70,变化幅度较小;表层分形维数小于亚表层.(3)分形维数与＜0.25 mm团聚体含量显著正相关,与有机质、全氮显著负相关.(4 ...
刘爱霞 +4 more
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Ultrasound in Obstetrics &Gynecology, Volume 65, Issue 5, Page 624-632, May 2025.ABSTRACT Objectives Placental insufficiency contributes to many obstetric pathologies, but there is no bedside clinical tool to evaluate placental perfusion. We have developed a method to acquire multiple three‐dimensional (3D) power Doppler (PD) ultrasound (US) volumes of placental vasculature, with infrared camera tracking of the precise spatial ...
A. Xue +5 more
wiley +1 more source
Fractal characteristics of spontaneous combustion of gas-bearing coal under different temperature and adsorption pressure conditions [PDF]
The composite disaster of gas and coal spontaneous combustion in the goaf is increasingly becoming the main disaster pattern that restricts the safe production of mines.
Bo TAN +4 more
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, 2015 Author name used in this publication: 吴浩Author name used in this publication: 李岩Author name used in this publication: SHI Wen-zhongAuthor name used in this publication: 陈晓玲Author name used in this publication: 付东杰2013-2014 > Academic research: refereed >
Chen, X, Fu, D, Li, Y, Shi, W, Wu, H
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China's Eco‐Civilisation, Climate Leviathan, and Hobbesian Energy Transition
Antipode, Volume 57, Issue 3, Page 830-861, May 2025.Abstract Scholars have hitherto tended to theorise China's ecological civilisation project either as a form of environmental authoritarianism or as a vision of eco‐socialism. This paper contributes to the conversation by conducting a textual analysis of Chinese scholarly discussions on eco‐civilisation.
David Chen
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Gaoya dianqi, 2017 绝缘子泄漏电流能够综合体现绝缘子电压水平、污秽状态,贯穿于绝缘子的整个闪络发展过程,提取绝缘子泄漏电流特征量对预测绝缘子闪络事故的发生尤为重要。在人工污秽试验的基础上,利用分形理论提取了复合绝缘子泄漏电流分形维数特征量,分析了闪络发展过程中泄漏电流不同区段波形和分形维数的变化特征,对比了3种不同污秽度水平下泄漏电流波形的分形特征。结果表明,在污闪发展过程中,泄漏电流波形的分形维数呈整体下降的趋势;污秽程度不同,泄漏电流波形分形特征存在微小的差异。实验分析证明,泄漏电流波形分形维数能够直接反映其波形特征 ...
秦莉娟 +5 more
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Policy &Internet, Volume 16, Issue 4, Page 727-738, December 2024.ABSTRACT Digital sovereignty unfolds differently and unevenly across geographies. The paper describes and theorizes three models of state digital sovereignty from the Global South—China, India and South Africa—three BRICS member countries that are home to over 1/3 of the world's population.
Min Jiang
wiley +1 more source