共查询到19条相似文献,搜索用时 140 毫秒
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二元判定自动机是借助于判定方法而不是用布尔逻辑来耱解开关函数的有限状态时序机,二元判定时序机(简称BDMs)在高速可编程控制器中的应用十分重要。因为BDMs的有效工作速度远远超过了普通微机处理器的有效工作速度。本文首次论了BDM求解时序函数的能力,以前研究者所定义的BDM表明,从自动机的理论上讲它的求解能力不如确定性有限状态自动机(简称DFA)的能力强,然而,用输入控制对BDM扩展之后表明其求解能力与DFA等效,这样BDM就可以用于完成有限状态时序函数的计算,本文旨在根据所期望的情况时空复杂性分析用BDM有限状态自动机取代较普通的自动机模型,同时阐述了由此分析所得出的硬件设计方法,并讨论编程方法。 相似文献
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有穷自动机,一种计算能力极其有限的计算模型,具有解决素性测试的能力通过构造法得到了证明。既而提出了一种基于有穷自动机的测试一个整数是否为素数的DNA算法,并且详细描述了该有穷自动机的构造方法,将有穷自动机的状态用DNA单链分子来编码,而输入则用DNA双链分子编码,用带环的双链DNA分子来编码状态转移规则,通过限制性内切酶的切割实现状态的转移。该算法的创新之处在于它是基于有穷自动机这种计算能力极其有限的计算模型的,并且该算法不仅能判断一个整数是否是素数,还能用于素因子分解。该算法的优点是实验实现容易,所需的时间是输入的多项式函数而不是指数函数。 相似文献
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细胞自动机的理论研究主要包括细胞自动机的分析和综合两个方面,而细胞自动机的可逆性分析则是细胞自动机分析中的核心问题。60/102/204混合细胞自动机作为一类重要的细胞自动机,利用矩阵分析方法将其状态转移表示为矩阵方程,从而分析其可逆性、可逆细胞自动机的数目和可逆细胞自动机的构造。60/102/204混合细胞自动机可逆性分析对于其在密码学、通信和测试等领域的应用具有重要意义。 相似文献
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基于有限状态机的UART设计 总被引:5,自引:0,他引:5
文章结合UART的设计,分析阐述了硬件设计中的有限状态自动机理论;并在分析UART功能特点的基础上,给出了利用有限状态自动机理论进行UART设计的实例,与其他设计方法相比较,利用有限状态自动机理论设计控制逻辑具有直观简单,设计流程短等优点,在EDA技术中必将发挥重要的作用。 相似文献
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自动机可用多种方法去实现,如用机械、液压、射流等方法,也可用计算机程序来实现。本文仅介绍用电路来实现自动机的方法。当机器处于状态S_i时,接受信息x_(ij)则转换为新状态S_j,在状态图中记作S_i x_(ij)→S_j若用触发器的组合来表达其状态,则可用触发器与逻辑器件组成实现自动机的电路。 相似文献
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With the emerging predominance of assertion-based dynamic verification, test generation is a key area where assertions can
play a bigger role. Generation of test sequences from properties defined by assertions can help in finding failures in corner-cases
of the design specification that without assertions may not be possible. As such, we rely on the duality between property
checkers and test generators to take advantage of the information present in the assertions for effective test scenarios—a
much needed endeavor given the increasing challenges in verification. To undertake such an effort, we first elaborate on the
relation between the coverage of the assertion-based specification and the specific coverage metrics over finite nondeterministic
automata representing the assertions. We finally present Airwolf-TG that generate test sequences from compact automata produced by the MBAC tool. 相似文献
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基于元胞自动机的多重零水印算法 总被引:1,自引:0,他引:1
利用混沌序列随机选择图像元胞自动机变换的低频系数产生初始构型,元胞自动机根据初始构型演化出零水印,然后用其加载有意义的二值水印,从而实现多重水印的零嵌入,从根本上保证了水印的不可见性.由于算法是基于元胞自动机域的,充分利用了元胞自动机复杂多变的特性,使水印有很好的安全性.实验结果表明提出的算法有较好的鲁棒性,也很好地解决了常见零水印方案所面临的问题. 相似文献
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Gupta P. Jha N. K. Lingappan L. 《Very Large Scale Integration (VLSI) Systems, IEEE Transactions on》2007,15(1):24-36
In this paper, we present a test generation framework for quantum cellular automata (QCA) circuits. QCA is a nanotechnology that has attracted recent significant attention and shows promise as a viable future technology. This work is motivated by the fact that the stuck-at fault test set of a circuit is not guaranteed to detect all defects that can occur in its QCA implementation. We show how to generate additional test vectors to supplement the stuck-at fault test set to guarantee that all simulated defects in the QCA gates get detected. Since nanotechnologies will be dominated by interconnects, we also target bridging faults on QCA interconnects. The efficacy of our framework is established through its application to QCA implementations of MCNC and ISCAS'85 benchmarks that use majority gates as primitives 相似文献
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Adaptive integrated image segmentation and object recognition 总被引:6,自引:0,他引:6
Bhanu B. Jing Peng 《IEEE transactions on systems, man and cybernetics. Part C, Applications and reviews》2000,30(4):427-441
The paper presents a general approach to image segmentation and object recognition that can adapt the image segmentation algorithm parameters to the changing environmental conditions. Segmentation parameters are represented by a team of generalized stochastic learning automata and learned using connectionist reinforcement learning techniques. The edge-border coincidence measure is first used as reinforcement for segmentation evaluation to reduce computational expenses associated with model matching during the early stage of adaptation. This measure alone, however, cannot reliably predict the outcome of object recognition. Therefore, it is used in conjunction with model matching where the matching confidence is used as a reinforcement signal to provide optimal segmentation evaluation in a closed-loop object recognition system. The adaptation alternates between global and local segmentation processes in order to achieve optimal recognition performance. Results are presented for both indoor and outdoor color images where the performance improvement over time is shown for both image segmentation and object recognition 相似文献