共查询到20条相似文献,搜索用时 62 毫秒
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胡迎刚 《电子制作.电脑维护与应用》2014,(20)
采用硬件描述语言,结合典型直流稳压电源电路,实现数控可逆步进调压直流稳压电源系统设计。采用CPLD作为数控软件实现平台,解决了可编程逻辑器件在模拟系统中使用难题,与传统单片机控制实现相比,该方案软件设计更简单、灵活,功能更完善。本文重点介绍了系统实现原理,VHDL实现控制代码,经验证,该系统能实现相应功能。 相似文献
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在总结了IPSec协议的实现框架的基础上,介绍了网络处理器的重要相关实现技术,例如树搜索引擎技术等,结合实际的工程经验提出一套基于网络处理器的IPSec实现方法,描述了重要实现环节,例如SAD&SPD实现、IPSec协议处理、加/解处理单芯片方案等。最后,对在新型路由器上实现网络协议的开发方法的发展趋势作出了预测。 相似文献
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介绍了Matrix VB在工程上实现智能算法的一种方法。该方法可以降低代码的复杂度,提高系统可靠性,易于实现数据的动态表现。以实现自适应BP算法在冷却塔风机效能建模中的应用为例,介绍了实现过程,为实现其它智能算法提供参考。 相似文献
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IPv6协议一致性测试系统 总被引:1,自引:1,他引:1
随着IPv6协议在我国的推广应用,各种相关设备蜂拥而来,由于各协议实现厂家对协议的不同理解,使得通信设备的协议非一致性问题日趋严重,为检查各个不同生产厂家的IPv6实现是否与标准文本相一致,进而确保不同厂家的IPv6实现之间能够互操作,开发一种IPv6协议一致性测试系统,并利用自定义的一种形式化描述语言,实现IPv6相关协议一致性测试集的形式化,文中给出该测试的结构,通过一个测试例介绍测试集的形式化和测试实现过程,使用该测试系统对多种IPv6协议实现进行测试,发现许不一致问题,为协议实现厂家提供了修改意见,作为例子,给出一种UnixIPv6邻居发现协议实现的测试结果分析。 相似文献
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文章对PC微机可视化环境的串行通信进行研究,介绍了利用PC微机串行端口实现通信的几种实用方案,如VB或Delphi待可视化编程语言中利用WindowsAPI函数实现串行通信,或利用MSComm通信控制实现串行通信,或拓展编写动态链接库实现串行通信,并给出了具体的实现范例。 相似文献
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网络教学的开展需要优秀网络课程的支持。根据网络课程的特点,讨论了基于.NET平台下面的网络课程创作系统的设计和实现,对系统进行了分析和功能设计,并重点解析了几种关键的实现技术,如基于Web的可视化编辑的实现技术,数据库服务层实现技术,模板个性化的实现技术等。 相似文献
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协议实现技术是影响高速计算机网络性能的一重要因素,本文对协议实现技术做了深入的分析和探讨,研究了硬件实现技术、并行实现技术,对软件实现新技术--流机制进行了分析和分析。 相似文献
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本文介绍实现YS-80仪表与适配器的设计思想,硬件构成,软件实现,其技术关键在于通讯软件实现。 相似文献
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分形集Hausdorff测度的估计是分形理论中的一个基本问题。对于一般的分形集而言,它们的Hausdorff测度准确值的计算,甚至是上下界的估计都是很困难的。即使对于一些经典的分形集也是这样。论文利用遗传算法计算出了压缩比为1/2的Sierpinski垫片Hausdorff测度的上界值,并针对计算过程中的编码方法、解码方法、群体的初始化以及适应度计算等一系列问题进行了详细分析,同时也为其他分形集Hausdorff测度的计算提供了一个通用、有效的方法。 相似文献
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Self-similar fractal sets: theory and procedure 总被引:2,自引:0,他引:2
The presented algorithm generates approximations of self-similar fractal sets. The algorithm is based on a pattern rewriting system that draws a geometric pattern repeatedly after suitable mappings. A program developed from the algorithm reproduces Mandelbrot's self-similar fractals. We begin by discussing fractals and dimension theory, then present the algorithm, and conclude by using fractal set theory to calculate the dimensions of self-similar sets from their generators 相似文献
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In this article, self‐similarity and space‐filling properties of fractal structures are explored as frequency selective diaphragms in rectangular waveguide, which can find applications in the design of compact, lightweight, and multiband waveguide filters with better out‐of‐band rejection ratio. Some self‐affine fractal structures, based on Sierpinski gasket and plus shape fractals, are proposed, and the effect of scaling factor on the location of transmission bands is investigated. Self‐similar structures like Hilbert curve, Koch curve, and Minkowski fractals are shown to be efficient in reducing resonant frequency of the diaphragm. Numerical results are presented along with the results obtained from HFSS, which show a good agreement. A typical application of the fractal diaphragm in the design of waveguide bandstop filter has also been demonstrated. © 2010 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2010. 相似文献
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K. Gdawiec 《Computer Graphics Forum》2017,36(1):35-45
In this paper, we generalize the idea of star‐shaped set inversion fractals using iterations known from fixed point theory. We also extend the iterations from real parameters to so‐called q‐system numbers and proposed the use of switching processes. All the proposed generalizations allowed us to obtain new and diverse fractal patterns that can be used, e.g. as textile and ceramics patterns. Moreover, we show that in the chaos game for iterated function systems—which is similar to the inversion fractals generation algorithm—the proposed generalizations do not give interesting results. 相似文献
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Based on new constructive means of the theory of R-functions, new approaches are proposed to the construction of equations for objects of fractal geometry. Equations for some of the most well-known fractals, namely, the Koch curve, snowflake, and cross, Sierpinski carpet, Levy fractal, and Pythagoras tree are presented. 相似文献
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We present an efficient new method for computing Mandelbrot-like fractals (Julia sets) that approximate a user-defined shape. Our algorithm is orders of magnitude faster than previous methods, as it entirely sidesteps the need for a time-consuming numerical optimization. It is also more robust, succeeding on shapes where previous approaches failed. The key to our approach is a versor-modulus analysis of fractals that allows us to formulate a novel shape modulus function that directly controls the broad shape of a Julia set, while keeping fine-grained fractal details intact. Our formulation contains flexible artistic controls that allow users to seamlessly add fractal detail to desired spatial regions, while transitioning back to the original shape in others. No previous approach allows Mandelbrot-like details to be “painted” onto meshes. 相似文献