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The application of fractal theory based on urbanization evaluation -- Urumuqi City as example
Applications GIS Spatial Data Fractal Theory
2015/2/5
Urbanization is a very complicated transforming process. There are many difficult point in
urbanization evaluation. It’s undoubtedly more objective and accurate to evaluate urbanization
level by qua...
Culturomics meets random fractal theory: Insights into long-range correlations of social and natural phenomena over the past two centuries
Culturomics meets random fractal theory Insights long-range correlations social natural phenomena two centuries
2012/2/27
Culturomics was recently introduced as the application of high-throughput data collection and analysis to the study of human culture. Here we make use of this data by investigating fluctuations in yea...
基于分形理论的地下滴灌灌水器水力特性研究（Research on the Hydraulic Properties of SDI Emitter Based on Fractal Theory）
地下滴灌 分形特征 土壤颗粒质量分形维数
2010/12/29
为了研究滴头工作压力和土壤物理特性对地下滴灌灌水器流量的影响，采用分形理论分析各种级配土壤的分形特征；以土壤颗粒质量分形维数、灌水器工作压力、土壤容积密度、土壤初始含水率为试验因素，运用混合水平均匀设计方法进行试验。结果表明，粘粒含量大小是土壤分形维数的主要影响因素，土壤分形维数随着粘粒含量的增加而增大；PLASSIM公司地下滴灌灌水器流量随土壤分形维数的增大而减小，即土壤质地越细地下滴灌滴头流量...
基于混沌-分形理论的往复式活塞隔膜泵磨损故障分析（Wearing Fault Diagnosis of Reciprocating Membrane Pump Based on Chaos and Fractal Theory）
往复式活塞隔膜泵 磨损 故障诊断 分形 混沌
2010/5/5
针对往复式活塞隔膜泵磨损故障，采用混沌理论和分形技术，对隔膜泵不同连接处磨损时的系统非线性表现形式加以研究。通过对不同故障类型振动信号的分析，绘制了相应的庞加莱截面图，并计算了各种磨损故障的最大李雅普诺夫指数和关联维数。研究表明当没有磨损故障时，系统为准周期态；而隔膜泵的各种磨损故障信号呈现混沌性态，且不同故障状态的最大李雅普诺夫指数和关联维数有着较大的差别，可以用作其状态监测和故障诊断的特征参数...