Phonon‐Assisted Electro‐Optical Switches and Logic Gates Based on Semiconductor Nanostructures

High‐performance nanostructured electro‐optical switches and logic gates are highly desirable as essential building blocks in integrated photonics. In contrast to silicon‐based optoelectronic devices, with their inherent indirect optical bandgap, weak light‐modulation mechanism, and sophisticated device configuration, direct‐bandgap‐semiconductor nanostructures with attractive electro‐optical properties are promising candidates for the construction of nanoscale optical switches for on‐chip photonic integrations. However, previously reported semiconductor‐nanostructure optical switches suffer from serious drawbacks such as high drive voltage, limited operation spectral range, and low modulation depth. High‐efficiency electro‐optical switches based on single CdS nanobelts with low drive voltage, ultra‐high on/off ratio, and broad operation wavelength range, properties resulting from unique electric‐field‐dependent phonon‐assisted optical transitions, are demonstrated. Furthermore, functional NOT, NOR, and NAND optical logic gates are demonstrated based on these switches. These switches and optical logic gates represent an important step toward integrated photonic circuits.     

Genetic Logic Gates Enable Patterning of Amyloid Nanofibers

Distinct spatial patterning of naturally produced materials is observed in many cellular structures and even among communities of microorganisms. Reoccurrence of spatially organized materials in all branches of life is clear proof that organization is beneficial for survival. Indeed, organisms can trick the evolutionary process by using organized materials in ways that can help the organism to avoid unexpected conditions. To expand the toolbox for synthesizing patterned living materials, Boolean type “AND” and “OR” control of curli fibers expression is demonstrated using recombinases. Logic gates are designed to activate the production of curli fibers. The gates can be used to record the presence of input molecules and give output as CsgA expression. Two different curli fibers (CsgA and CsgA‐His‐tag) production are then selectively activated to explore distribution of monomers upon coexpression. To keep track of the composition of fibers, CsgA‐His‐tag proteins are labeled with nickel–nitrilotriacetic acid (Ni–NTA‐) conjugated gold nanoparticles. It is observed that an organized living material can be obtained upon inducing the coexpression of different CsgA fibers. It is foreseen that living materials with user‐defined curli composition hold great potential for the development of living materials for many biomedical applications.     

基于模糊逻辑控制器的自适应遗传算法

针对遗传算法中交叉概率和变异概率的缺陷，设计了一种基于模糊逻辑控制器的自适应遗传算法，实验结果表明，该算法具有较好的在线性能。     

关于模糊逻辑与模糊推理逻辑基础问题的十年研究综述

自从1993年发生关于模糊逻辑的一场争论以来,模糊逻辑和模糊推理研究在十年里得到了迅速的发展。本文对这十年国内外关于模糊逻辑和模糊推理研究的大致情况做一个回顾,简要分析这些研究工作的主要特点。     

基于模糊逻辑的异步电动机转速控制

本文设计了基于模糊逻辑控制的速度控制器,以提高异步电动机矢量控制系统对参数变化和负载扰动的鲁棒性,并通过MABLAB/SIMULIINK仿真将其与PI控制的系统速度响应进行比较,仿真结果表明模糊控制能使系统取得较好的控制性能并具有较强的鲁棒性.     

基于模糊逻辑的纸病检测动态阈值设置方案研究

目的提高阈值法在纸病检测系统中的通用性。方法通过实验法获取不同时间段图像灰度数据,依据获取数据的时间段对图像灰度数据进行分类,求得相应时间段的灰度最大平均值、灰度最小平均值、总体灰度平均值以及灰度标准差,应用图表分析法对图像灰度的各种数据进行对比分析,总结出图像灰度变化规律,使用Visual studio 2015进行编程并验证。结果实验结果显示此方案可以较好地适应外界光线的变化,提高纸病检测系统的鲁棒性。结论基于模糊逻辑的纸病检测动态阈值设置方案,可以有效提高阈值法在纸病检测系统中的通用性。     

Intelligent Cloud Based Load Balancing System Empowered with Fuzzy Logic

Cloud computing is seeking attention as a new computing paradigm to handle operations more efficiently and cost-effectively. Cloud computing uses dynamic resource provisioning and de-provisioning in a virtualized environment. The load on the cloud data centers is growing day by day due to the rapid growth in cloud computing demand. Elasticity in cloud computing is one of the fundamental properties, and elastic load balancing automatically distributes incoming load to multiple virtual machines. This work is aimed to introduce efficient resource provisioning and de-provisioning for better load balancing. In this article, a model is proposed in which the fuzzy logic approach is used for load balancing to avoid underload and overload of resources. A Simulator in Matlab is used to test the effectiveness and correctness of the proposed model. The simulation results have shown that our proposed intelligent cloud-based load balancing system empowered with fuzzy logic is better than previously published approaches.     

扰动模糊逻辑I2的最大子代数及其广义重言式

运用R0-蕴涵算子，找到扰动模糊命题逻辑I^2的一个最大子代数IR，进而将逻辑系统否中的广义重言式理论推广到IR中，得到类似的结果。由此说明关于一维赋值格的结果需要加一定的限制条件才能推广到二维赋值格上去。     

基于模糊逻辑的产品意象造型设计研究

为设计出符合消费者感性需求的产品,采用基于模糊逻辑的产品意象造型设计方法。首先确定感性词汇与造型设计要素,利用模糊逻辑建立二者之间的关系。通过模糊化、模糊规则的构建、模糊推理以及反模糊化等过程进行模糊逻辑控制器的设计,用Matlab建立仿真模型,最后通过测试验证了模型的有效性。结合折叠自行车造型设计进行研究,结果表明该方法是正确可行的。     

模糊命题逻辑系统中的代换定理

在舍弃了经典逻辑系统中公理L1)的基础上建立了一类模糊命题逻辑的准形式演绎系统LGR^*。并在此基础上研究了模糊逻辑系统中的代换定理，为进一步研究模糊命题逻辑系统的完备性奠定了一定的基础。     

模糊逻辑中的自然演绎系统

讨论了经典逻辑的自然演绎系统在模糊逻辑中的对应形式。基于著名的形式演绎系统L*，建立起对应的自然演绎系统L*nd，并且证明了这个系统的完备性。由于一系列新的推理规则的引入，模糊逻辑的推理能力得到明显增强。     

基于控制图的模糊资料判别研究

与一般处理如合格或不合格等布尔型数据的质量控制图不同,针对不适合采用布尔逻辑的产品质量数据,应用模糊逻辑构建质量控制图,以加权平均法来解模糊化,权重采用模糊中位数作为不同语言类别的表示值.通过实例分析,这种方法可以比较满意地进行工序控制工作.