IoT Smart Devices Risk Assessment Model Using Fuzzy Logic and PSO

Increasing Internet of Things(IoT)device connectivity makes botnet attacks more dangerous,carrying catastrophic hazards.As IoT botnets evolve,their dynamic and multifaceted nature hampers conventional detection methods.This paper proposes a risk assessment framework based on fuzzy logic and Particle Swarm Optimization(PSO)to address the risks associated with IoT botnets.Fuzzy logic addresses IoT threat uncertainties and ambiguities methodically.Fuzzy component settings are optimized using PSO to improve accuracy.The methodology allows for more complex thinking by transitioning from binary to continuous assessment.Instead of expert inputs,PSO data-driven tunes rules and membership functions.This study presents a complete IoT botnet risk assessment system.The methodology helps security teams allocate resources by categorizing threats as high,medium,or low severity.This study shows how CICIoT2023 can assess cyber risks.Our research has implications beyond detection,as it provides a proactive approach to risk management and promotes the development of more secure IoT environments.

High-performance chiral all-optical OR logic gate based on topological edge states of valley photonic crystal

For all-optical communication and information processing,it is necessary to develop all-optical logic gates based on photonic structures that can directly perform logic operations.All-optical logic gates have been demonstrated based on conventional waveguides and interferometry,as well as photonic crystal structures.Nonetheless,any defects in those structures will introduce high scattering loss,which compromises the fidelity and contrast ratio of the information process.Based on the spin-valley locking effect that can achieve defect-immune unidirectional transmission of topological edge states in valley photonic crystals(VPCs),we propose a high-performance all-optical logic OR gate based on a VPC structure.By tuning the working bandwidth of the two input channels,we prevent interference between the two channels to achieve a stable and high-fidelity output.The transmittance of both channels is higher than 0.8,and a high contrast ratio of 28.8 dB is achieved.Moreover,the chirality of the logic gate originated from the spin-valley locking effect allows using different circularly polarized light as inputs,representing“1”or“0”,which is highly desired in quantum computing.The device’s footprint is 18μm×12μm,allowing high-density on-chip integration.In addition,this design can be experimentally fabricated using current nanofabrication techniques and will have potential applications in optical communication,information processing,and quantum computing.

Graphene Bridge Heterostructure Devices for Negative Differential Transconductance Circuit Applications

Two-dimensional van der Waals(2D vdW)material-based heterostructure devices have been widely studied for high-end electronic applications owing to their heterojunction properties.In this study,we demonstrate graphene(Gr)-bridge heterostructure devices consisting of laterally series-connected ambipolar semiconductor/Gr-bridge/n-type molybdenum disulfide as a channel material for field-effect transistors(FET).Unlike conventional FET operation,our Gr-bridge devices exhibit nonclassical transfer characteristics(humped transfer curve),thus possessing a negative differential transconductance.These phenomena are interpreted as the operating behavior in two series-connected FETs,and they result from the gate-tunable contact capacity of the Gr-bridge layer.Multi-value logic inverters and frequency tripler circuits are successfully demonstrated using ambipolar semiconductors with narrow-and wide-bandgap materials as more advanced circuit applications based on non-classical transfer characteristics.Thus,we believe that our innovative and straightforward device structure engineering will be a promising technique for future multi-functional circuit applications of 2D nanoelectronics.

Controllable all-optical stochastic logic gates and their delay storages based on the cascaded VCSELs with optical-injection

Using the dynamical properties of the polarization bistability that depends on the detuning of the injected light,we propose a novel approach to implement reliable all-optical stochastic logic gates in the cascaded vertical cavity surface emitting lasers（VCSELs） with optical-injection.Here,two logic inputs are encoded in the detuning of the injected light from a tunable CW laser.The logic outputs are decoded from the two orthogonal polarization lights emitted from the optically injected VCSELs.For the same logic inputs,under electro-optic modulation,we perform various digital signal processing（NOT,AND,NAND,XOR,XNOR,OR,NOR） in the all-optical domain by controlling the logic operation of the applied electric field.Also we explore their delay storages by using the mechanism of the generalized chaotic synchronization.To quantify the reliabilities of these logic gates,we further demonstrate their success probabilities.

All-Optical Cryptographic Device for Secure Communication

An all-optical cryptographic device for secure communication, based on the properties of soliton beams, is presented. It can encode a given bit stream of optical pulses, changing their phase and their amplitude as a function of an encryption serial key that merge with the data stream, generating a ciphered stream. The greatest advantage of the device is real-time encrypting – data can be transmitted at the original speed without slowing down.

Electrochemical biosensors and logic devices based on aptamers

Aptamers are molecular recognition elements with high specificity that are selected from deoxyribonucleic acid/ribonucleic acid (DNA/RNA) library. Compared with the traditional protein recognition elements,aptamers have excellent properties such as cost-effective,stable,easy for synthesis and modification. In recent years,electrochemistry plays an important role in biosensor field because of its high sensitivity,high stability, fast response and easy miniaturization. Through the combination of these two technologies and our rational design,we constructed a series of biosensors and biochips that are simple,fast,cheap and miniaturized. Firstly,we designed an adenosine triphosphate (ATP) electrochemical biosensor based on the strand displacement strategy. We can detect as low as 10 nmol/L of ATP both in pure solution and complicated cell lysates. Secondly,we creatively split the aptamers into two fragments and constructed the sandwich assay platform only based on single aptamer sequence. We successfully transferred this design on biochips with multiple micro electrodes (6×6) and accomplished multiplex detection. In the fields of biochips and biocomputers,we designed several DNA logic gates with electric (electrochemical) signal as output which paves a new way for the development of DNA computer.

All-optical XNOR and AND gates simultaneously realized in a single semiconductor optical amplifier with improved dynamics

All-optical XNOR and AND logic gates using four-wave mixing （FWM） and cross-gain modulation （XGM） in a single semiconductor optical amplifier （SOA） with improved dynamics are simultaneously realized. By numerical simulation, the effects of the input optical wave powers and injection current on the critical factors of the logic gate performances, such as the ON-OFF contrast ratio, the power-output level of the logic ＇1＇, and the difference between power outputs of the logic ＇1＇, are investigated in detail. In addition, the effect of the counter-propagating CW pump on the gain recovery is analysed.

All-optical modulator based on a ferrofluid core metal cladding waveguide chip

We propose a novel optical intensity modulator based on the combination of a symmetrical metal cladding optical waveguide （SMCW） and ferrofluid, where the ferrofluid is sealed in the waveguide to act as a guiding layer. The light matter interaction in the ferrofluid film leads to the formation of a regular nanoparticle pattern, which changes the phase match condition of the ultrahigh order modes in return. When two lasers are incident on the same spot of the waveguide chip, experiments illustrate all-optical modulation of one laser beam by adjusting the intensity of the other laser. A possible theoretical explanation may be due to the optical trapping and Soret effect since the phenomenon is considerable only when the control laser is effectively coupled into the waveguide.

All-Optical EXOR for Cryptographic Application Based on Spatial Solitons

The purpose of this paper is to present an all-optical EXOR for cryptographic application based on spatial soliton beams. The device is based on the propagation and interactions properties of spatial soliton in a Kerr nonlinear material. The interaction force between parallel soliton beam is analyzed from the analytical point of view and an exact solution is presented.

介绍MAS-1000 集散控制系统中 Device Logic

丰城电厂１、２号机组控制设备ＭＡＸ－１０００集散控制系统中的设备逻辑块ＤｅｖｉｃｅＬｏｇｉｃ，对两位制控制设备具有灵活的组态，笔者对其在ＢＭＳ系统调试实践中的应用，取得了良好的效果。

PLC技术在机电一体化设备智能控制中的应用

可编程逻辑控制器(Programmable Logic Controller,PLC)是一种在自动化与工业控制系统中广泛应用的电子装置。因其高度的可靠性、灵活性及适应性,PLC已成为机电一体化设备智能控制的核心技术之一。机电一体化设备结合了电子技术、机械技术及计算技术,旨在通过智能化控制提升设备的操作效率和精确度。PLC在此领域中的应用,不仅促进了工业生产线的自动化,还在数控机床和工业机器人等设备上展示了强大的控制能力。基于此,系统地阐述PLC技术的基本原理与结构,深入探讨其在机电一体化设备中的具体应用,如数控机床和工业机器人的智能控制,分析PLC面临的挑战,预测其未来的发展方向。

Flexible planar micro supercapacitor diode

Supercapacitor diode is a novel ion device that performs both supercapacitor energy storage and ion diode rectification functions.However,previously reported devices are limited by their large size and complex processes.In this work,we demonstrate a screen-printed micro supercapacitor diode(MCAPode)that based on the insertion of a finger mode with spinel ZnCo_(2)O_(4) as cathode and activated carbon as anode for the first time,and featuring an excellent area specific capacitance(1.21 mF cm^(-2)at 10 mV s^(-1))and high rectification characteristics(rectification ratioⅠof 11.99 at 40 mV s^(-1)).Taking advantage of the ionic gel electrolyte,which provides excellent stability during repeated flexing and at high temperatures.In addition,MCAPode exhibits excellent electrochemical performance and rectification capability in"AND"and"OR"logic gates.These findings provide practical solutions for future expansion of micro supercapacitor diode applications.

基于国产化平台的冲击波超压测试系统设计

在当前特种测试系统国产化替代趋势下,针对传统冲击波超压测试系统存在的安全性低、进口依赖性强和自主可控性差等技术问题,提出了一款以国产复杂可编程逻辑器件(Complex Programmable Logic Device,CPLD)和ARM(Advanced RISC Machine)处理器为核心架构的冲击波超压测试系统。其中,ARM单元负责响应系统工作循环指令,CPLD则控制A/D转换模块实现采样频率高达1 MHz的数据采集和对内外触发逻辑的精确判断,数据转换结果经由外部存储器控制器(External Memory Controller,EXMC)传输并存储至eMMC存储器中,最终通过以太网传输至上位机显示。经现场试验表明,测试系统具有良好的可靠性,能够在复杂测试环境下实现对冲击波超压信号高保真采集与记录存储,为动态数据采集提供了一种切实可行的解决方案,推动了关键测试设备国产化替换进程。

可编程逻辑器件间的大数据自适应跟踪系统设计

用户访问可编程逻辑器件时,由于无法直接访问系统数据,导致器件数据与用户数据之间出现冲突,为此设计了可编程逻辑器件间的大数据自适应跟踪系统。构建自适应跟踪总体结构,同步本地参考信号和外部输入信号。配置时钟电路,计算时钟上升和下降过渡时间,避免电路供电杂波干扰。系统采用非侵入式设计自适应跟踪机制,结合Mean Shift跟踪算法计算跟踪矢量,确定可编程逻辑器件间数据的匹配位置。利用Kalman滤波器对数据进行滤波处理,获取大数据自适应跟踪结果。由实验结果可知,该系统噪声信号变化范围是40~100 dB,与实际变化范围一致。同步信号变化范围是35~100 dB,其中,在5~8 s时同步信号变化范围与实际变化范围不一致,其余均一致,具有精准跟踪效果。

All-optical logic gates based on hierarchical photonic crystal modulated photoluminescence of perovskite nanocrystals

Halide perovskites exhibit high performance in all sorts of optoelectronic and photonic areas, suggesting their huge potential in integrated photonic devices. However, until now, all optical logic gates based on perovskites are still rarely explored, hindering the development of all-optical networks and computing. Herein, a new concept of all-optical logic gates is proposed based on the modulation of photoluminescence(PL) from perovskite nanocrystals(PNCs). A hierarchical photonic crystal(Hie PhC) is developed by self-assembling polystyrene(PS) and SiO2nanoparticles, which exhibit a higher PL enhancement than that of a monolayer PhC. Moreover, the light-controlled PL is realized by taking advantage of the high thermal response of the PL from PNCs/Hie PhC on polyethylene(PE) substrate, assisted by a graphene layer for light-heat conversion. Consequently, optical diode and triode are achieved based on the modulated PL, which exhibit contrast ratios(CR) of 24.7 and 74.0 dB, respectively.All-optical logic gates, including “AND”, “OR” and “NOT”, are realized based on the optical diode and triode.

Parallel all-optical logic operations based on metasurface polarization optics

We developed a general framework for parallel all-optical logic operations with independent phase control of arbitrary orthogonal polarization state enabled by a single-layer metasurface.A pair of orthogonal circular polarized bases are used as two input channels of the logic operator,and their four combinations perfectly match various binary input states.Correspondingly,distinct phase profiles are encoded into the metasurface,which enables parallel operation of the two logic gates by way of polarization switching.It allows for an efficient and compact way to implement multi-channel multiplexed logic gate operations with the capability of fast optical computing at the chip scale.

复卷机包片装置的机构设计研究

随着我国科技的发展和造纸行业的现代化改革,复卷机成为造纸行业不可或缺的自动化装置。各用纸厂商对成品纸张的质量和要求正在不断提高,对复卷机精度控制和运行速度等的要求也逐步提高。但是,市面上对于复卷机包片的设计研究较少,随着市场的调控及人们的环保意识不断加强,一些污染严重、危险性高、成本高的手工操作环节不断被自动化设备取代,因此急需优化加工工艺。所提出的复卷机自动包片装置可以节省大量的时间及人力成本,对于提高生产效率、解决生产成本具有重大意义。

基于CPLD的发射机便携式综合检测设备设计

以模拟数字转换(ADC)采样技术为基础,结合嵌入式逻辑分析软件仿真技术,使用复杂可编程逻辑器件(CPLD)实现了一套发射机综合测试设备,该设备具有参数采集、输出功率采样、故障显示、状态显示、状态控制、状态在线监测功能及便携式、轻量化的特性,在发射机外场调试、设备抢修等方面具有很强的实用性。

关于某家用电器平面轴承自动装钢珠装置的研究与应用

为提升家电企业轴承装钢珠的组装效率,降低员工组装轴承钢珠的工作强度,本文在对轴承钢珠组装的动作步骤分析的基础上,设计出一种单工位自动组装轴承钢珠的装置。通过设计自动组装轴承钢珠装置,自动供料装置,PLC逻辑控制电路等,使该装置各部分紧密配合,继而实现轴承自动装钢珠功能~[1]。

国产FPGA在智能变电站二次设备测试系统中的应用

分析智能变电站二次系统通用测试方案,提取测试方案中涉及的功能性能参数,研究测试方案中大规模逻辑器件(FPGA)的关键性能指标,提出了国产FPGA在智能变电站二次设备测试系统中应用的可行性方案。结合国内厂商的主流FPGA,在其可编程逻辑资源、IP资源、查找表资源、高速收发器、EDA软件等方面展开研究。研究结果表明国产FPGA在接口兼容性、大数据处理能力、高速接口支持、实时性等方面均表现优秀,能够支撑智能变电站二次系统测试需求,同时研究成果也为智能变电站二次系统测试实现完全自主可控提供了技术支持。