共查询到19条相似文献,搜索用时 125 毫秒
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触发器是数字电路中的一个重要单元电路,是组成时序逻辑电路的重要单元。并且触发器按功能可以分为RS触发器、JK触发器、D触发器、T触发器等;按组成结构可以分为基本结构触发器、同步结构触发器、主从结构触发器、边沿结构触发器等。这样的话,关于触发器可以组合成很多类型,如同步JK触发器、基本RS触发器、边沿D触发器等,为了简化教学,我们可以把这些触发器电路中相同功能、不同结构的电路进行简化分析。 相似文献
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总结基本RS触发器、同步RS触发器、主从RS触发器和主从JK触发器等不同电路结构触发器的动作特点,特别对不定态、空翻.一次翻转等进行讨论.以便学生理解和记忆。 相似文献
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JK触发器是数字电路中应用最广功能最强大的一类触发器,但其结构有其特定的规律,不存在同步触发器。有些教材只凭想象,凭空捏造,一必须加以澄清。 相似文献
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本文以JK触发器为例,从电路结构的角度说明其使用中常见的干扰现象,产生的原因及其对电路可靠性的影响,并指出了消除干扰的措施。 相似文献
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姜美霞 《内蒙古科技与经济》1999,(Z2)
在讲解由与非门组成的基本RS ,同步RS ,和主从RS触发器及JK触发器的过程中 ,由于涉及的触发器各类较多 ,因此 ,对这些触发器逻辑功能的理解和记忆比较困难。为了使学生便于学习与记忆 ,可将这些触发器联系起来 ,使教与学都变得较为简单。首先 ,将基本RS触发器与同步RS触发器联系。基本RS触发器的逻辑功能可由逻辑电路直接分析出 ,如真值表 ( 1)所示。为便于记忆 ,可强调低电平有效 ,- R端为置O端 ,- S为置 1端。在基本RS触发器的基础上 ,构成了同步RS触发器 ,教学时 ,强调同步RS触发器在CP =1期间接收信号 ,其逻辑… 相似文献
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分析了自启动移位型计数器的传统最简设计和多码状态分配设计,给出了由JK触发器构成的环形计数器、含全零格环形计数器、扭环形计数器及2n-1计数器的设计通式,并对各种设计方法进行了比较。 相似文献
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三值环形计数器的设计 总被引:1,自引:0,他引:1
本文在分析二值环形计数器的设计思想的基础上,提出了三值环形计数器基于模代数的三值D型和JK型触发器的电路设计。此外,还提出了借助于三值K图化简技术设计具有自校正功能的三值环形计数器的方法。 相似文献
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基本RS触发器、同步RS触发器状态定义,有些教材定义不准。严格区分“不定”和“不定义”状态是十分必要的。 相似文献
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从捷康胜诉“三氯蔗糖案”解读美国对华337调查 总被引:1,自引:0,他引:1
近年来随着中美双边贸易的快速增长,美国针对中国企业发起的337调查也呈现逐年上升态势,我国已成为337调查最主要的对象,337调查已成为美国对华贸易救济中最为犀利的武器,对我国出口企业带来了极大的危害。与国内不少企业缺乏知识产权保护意识、应诉不积极相比,江苏盐城捷康公司主动申请加入"三氯蔗糖案"337调查并取得完胜,这对国内外向型企业应对美国337调查、开拓国际市场具有一定的借鉴意义。 相似文献
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Yuhua Xu Defeng Meng Chengrong Xie Guoqiao You Wuneng Zhou 《Journal of The Franklin Institute》2018,355(1):164-176
This paper deals with the synchronization control of a class of delayed neural networks using a fast fixed-time control theory. By employing Lyapunov stability theory, a novel sufficient criterion is derived such that two neural networks can be synchronized within a fixed-time. Compared with some existing results, the proposed controller can render two neural networks faster synchronized. A numerical example is given to demonstrate the effectiveness of the criterion. 相似文献
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In this paper, the existence of synchronized stationary distribution for hybrid stochastic coupled systems (HSCSs) (here, also known as stochastic coupled systems with Markovian switching) is concerned. By the existence theory of stationary distribution as well as Lyapunov method and graph theory, two kinds of sufficient criteria are presented to promise the existence of synchronized stationary distribution for HSCSs. Our results exhibit that the existence region of synchronized stationary distribution has a close relationship with the intensity of stochastic perturbation. And when stochastic perturbation vanishes, synchronized stationary distribution will become complete synchronization. Then the proposed theoretical results are successfully applied to stochastic coupled oscillators and a Chua’s circuits network. Some existence criteria of synchronized stationary distribution are also obtained. The corresponding numerical simulations are carried out to verify the validity of the theoretical results. 相似文献
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针对集装箱码头内装卸桥、集装箱卡车与龙门吊三者对集装箱装卸问题,基于现今码头同步装卸技术的思想,在深入分析研究该项技术在集装箱装卸调度方法的实际应用基础上,结合集装箱贝位协同作业的同步装卸方法,提出了基于堆场混堆的集装箱异贝位同步调度方法,建立了集装箱卡车总行驶距离最小的数学模型,并运用单亲遗传算法对模型进行求解.运用Matlab进行数值模拟,对比传统单程装卸模式的数据,验证了基于堆场混堆的集装箱异贝位同步调度方法的可行性与有效性. 相似文献
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根据近40年在黄河中下游地区气候、灾害、植被与土地利用变化历史等方面的研究成果,综合分析了过去2000年黄河中下游地区温度、干湿、极端旱涝等的变化特征,以及历史农耕发展对土地覆被的改变和垦殖率变化的总体趋势;并从长期变化视角简要讨论了这些变化与黄河下游地区泥沙淤积、决口改道的宏观关系。主要结论有:过去2000年黄河中下游地区温度与干湿呈显著多尺度周期波动,且中游和下游地区的干湿变化并不完全同步;极端旱涝发生频率存在阶段性差异。至公元初前后,黄河中下游地区就已被开发为一个垦殖范围与今相近的农业区,其自然植被分布极为有限,且其后的农耕垦殖强度虽有大幅波动,但总体呈增加趋势。上述因素变化相互交织影响了黄河中、下游水沙输送平衡、河道淤积和河床稳定,是引发历史上黄河下游多次重现“筑堤—淤积—悬河—决口改道”循环过程的重要因素。这些认识可为进一步科学理解黄河中下游地区的环境变化规律及其与下游地区河流安澜的关系提供历史背景依据。 相似文献
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Sung Jin Yoo 《Journal of The Franklin Institute》2019,356(11):5781-5800
This paper presents a connectivity-preserving approximation-free design strategy for the distributed synchronized tracking of uncertain nonlinear multi-agent systems with limited communication ranges. All nonaffine nonlinearities in pure-feedback form are assumed to be unknown. The main contribution of this paper is to achieve approximation-free synchronized tracking while preserving the initial interaction patterns among agents. To this end, each synchronization error term is individually transformed to a nonlinear error function with a predefined time-varying function. The local tracking laws using only the relative output information among agents are designed via these nonlinear error terms. The connectivity preservation and preassigned tracking performance of the proposed synchronized tracking system are recursively analyzed in the Lyapunov sense, without employing any function approximators and potential functions. Finally, the effectiveness and robustness of the proposed strategy are demonstrated through simulation examples. 相似文献
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In this paper, we investigate the output synchronization of networked SISO nonlinear systems that can be transformed into semi-strict feedback form. Due to parameter uncertainty, the agents have heterogeneous dynamics. Combined backstepping method together with graph theory, we construct an augmented Laplacian potential function for analysis and a distributed controller is designed recursively for each agent such that its output can be synchronized to its neighbors' outputs. The distributed controller of each agent has three parts: state feedback of itself, neighborhood information transmitted through the network and adaptive parameter updaters both for itself and its neighbors. Moreover, distributed tuning function is designed to minimize the order of the parameter updater. It is proved that when the undirected graph is connected, all agents’ outputs in the network can be synchronized, i.e., cooperative output synchronization of the network is realized. Simulation results are presented to verify the effectiveness of the proposed controllers. 相似文献