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分形技术为描述一些不能用传统的欧氏几何描述的自然界和非线性系统中不光滑和不规则的几何形体提供了方法。本文在分析分形艺术图形的形态特点的基础上,探讨了分形艺术应用于陶瓷装饰纹样创新设计的方法和优势,最后深入探讨了生成分形图形进行纹样创作的方法。 相似文献
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陈良 《中国石油和化工标准与质量》2014,(14)
蚓孔具有分形性[1],本文通过分形理论中的L-系统生成法和DLA法对蚓孔进行计算机模拟[2],其分形图形和蚓孔的形态极其相似,这也暗示了可能反映出蚓孔生长的一些因素。并对蚓孔的分形模型建立了数学模型并求解[3],从而得出基质酸化中蚓孔的穿刺距离[4]。 相似文献
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材料科学的许多研究对象都具有自相似性,而自相似性可以用分形维数加以描述。因而,分形维数作为材料的结构参数近年来获得了许多应用,分形维数的测定方法也得到了发展。本文简略地介绍了分形理论的基本概念和思想,并综述了材料科学中有关分形维数的常用测定方法。如切割岛法、吸附法和X射线小角散射法。 相似文献
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计算机视觉检测系统在絮凝处理中的应用 总被引:2,自引:0,他引:2
絮凝法是废水处理过程中应用最广泛的一种方法。絮凝剂的性质直接影响絮凝效果。作者对计算机视觉检测系统在废水絮凝处理过程中的应用进行了研究。首先介绍了计算机絮凝检测系统的构成及设计原理和方法.然后通过对两种絮凝剂在模拟废水中的絮凝沉淀实验,用计算机视觉检测系统的图像获取功能对絮凝的全过程进行跟踪拍摄,并利用计算机图像处理技术对絮体图像进行分析,找出与絮体沉降特性有关的图形参数.得到絮体图像灰度值与溶液浊度之间的关系曲线,并提出利用絮体图像灰度直方图来判定絮凝沉淀的终点的方法,为絮凝过程的自动化控制提供依据。 相似文献
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分维是描述分形的定量参数。储集层岩石的孔隙结构具有良好的分形特征,孔隙结构的分维可以定量描述孔隙结构的复杂程度。目前测量孔隙结构分维主要有四种方法:吸附法、离散法、散射法和压汞法。而分维的应用主要在五个方面:研究岩石的常规物性、成岩作用与沉积作用对分形的影响、粘性指进现象的研究、研究储层伤害与保护机理和对储层非均质性的研究。分形方法在孔隙结构中的应用不仅可以深化我们对孔隙结构的认识,还可以为孔隙结构中较复杂的问题提供新的工具。 相似文献
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本文提出基于分形理论进行陶瓷装饰图案设计,并利用面向对象软件开发技术和语言,开发出了一套实用的图案设计软件,设计人员可以利用该软件生成的图案进行陶瓷装饰图案设计。通过图案设计实例表明,基于分形理论的陶瓷装饰软件在生成装饰图案时是快捷有效的。 相似文献
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以普通挤出机直的参数化程度设计为例,阐述在AutoCAD12.0环境下进行二次开发的前处理技术,并人原理和实现过程进行了分析。该方法也适用于一般参数化设计。 相似文献
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The solid-liquid separation is an important operation for the regenerated slurry of dual-alkali FGD system, and calcium sulfite could predominate in particle aggregates of the slurry. The settling velocity of calcium sulfite particles is a key parameter for the solid-liquid separation design. However, the settling velocity predicted by Stokes' Law could be suitable only for a spherical aggregate, but not for the irregular one. In this work, fractal geometry was introduced in order to characterize highly irregular geometric shapes. The sizes of calcium sulfite particle aggregates were analyzed using a metallographic phase microscope and image analysis. The results showed that particle aggregates had fractal features. The fractal dimensions could reveal the characteristics of the aggregates' geometry and aggregation process. An exponential relation between the fractal dimension D2 and the particle size l was determined as AμlD2. According to fractal theory, a parameter can be used to modify Stokes settling velocity close to actual settling velocity. The results could be valuable for the design of solid-liquid separation processes. 相似文献
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In this paper, the self-similar functional circuit models of arteries are proposed for bioinspired hemodynamic materials design. Based on the mechanical-electrical analogous method, the circuit model can be utilized to mimic the blood flow of arteries. The theoretical mechanism to quantitatively simulate realistic blood flow is developed by establishing a fractal circuit network with an infinite number of electrical components. We have found that the fractal admittance operator obtained from the minimum repeating unit of the fractal circuit can simply and directly determine the blood-flow regulation mechanism. Furthermore, according to the operator algebra, the fractal admittance operator on the aorta can be represented by Gaussian-type convolution kernel function. Similarly, the arteriolar operator can be described by Bessel-type function. Moreover, by the self-similar assembly pattern of the proposed model, biomimetic materials which contain self-similar circuits can be designed to mimic physiological or pathological states of blood flow. Studies show that the self-similar functional circuit model can efficiently describe the blood flow and provide an available and convenient structural theoretical revelation for the preparation of in vitro hemodynamic bionic materials. 相似文献
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Based on frequency response and convex optimization, a novel optimal control system was developed for chemical processes. The feedforward control is designed to improve the tracking performance of closed loop chemical systems. The parametric model is not required because the system directly utilizes the frequency response of the loop transfer function, which can be measured accurately. In particular, the extremal values of magnitude and phase can be solved according to constrained quadratic programming optimizer and convex optimization. Simulation examples show the effectiveness of the method. The design method is simple and easily adopted in chemical industry. 相似文献
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