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Electrical Machine Bearing Fault Diagnosis Based on Deep Gaussian Process Optimized by Particle Swarm 基于粒子群优化深度高斯过程的电机轴承故障诊断
Pub Date : 2022-05-18 DOI: 10.37394/23201.2022.21.11
Hai Guo, Haoran Tang, Xin Liu, Jing-ying Zhao, Likun Wang
Aiming at the problems of low accuracy and slow diagnosis speed in the existing fault diagnosis model of electrical machine bearing, this paper presents an electrical machine bearing fault diagnosis method based on Deep Gaussian Process of particle swarm optimization(DGP). A total of 10 characteristics of 9 damage states and no fault states of the bearing are determined, constructing a deep Gaussian process model for electrical machine bearing fault diagnosis based on expectation propagation and Monte Carlo method, and use the particle swarm optimization algorithm to perform parameter searching optimization for its induction point value. The experimental results show that the fault recognition rate of DGP on the CWRU data set reaches 95%, significantly better than other deep learning methods, integration methods and machine learning methods. DGP method can better diagnose electrical machine bearing faults, provide technical support for the safe operation of the electrical machine which are important for real industrial applications.
针对现有电机轴承故障诊断模型准确率低、诊断速度慢的问题,提出了一种基于深度高斯过程粒子群优化(DGP)的电机轴承故障诊断方法。确定了轴承的9种损伤状态和无故障状态共10个特征,构建了基于期望传播和蒙特卡罗方法的电机轴承故障诊断深度高斯过程模型,并利用粒子群优化算法对其感应点值进行参数搜索优化。实验结果表明,DGP在CWRU数据集上的故障识别率达到95%,明显优于其他深度学习方法、集成方法和机器学习方法。DGP方法能较好地诊断电机轴承故障,为电机的安全运行提供技术支持,对实际工业应用具有重要意义。
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引用次数: 0
ARC High Order Filters Suitable for Antialiasing and/or Reconstruction Filters ARC高阶滤波器适用于抗混叠和/或重构滤波器
Pub Date : 2022-05-18 DOI: 10.37394/23201.2022.21.10
Bohumil Brtnik
The discrete time signal processing circuit requires an anti-aliasing filter at the input and a reconstruction filter at the output, generally. In this paper, selected basic structures of some active filters are described and compared with a view to the degradation of the attenuation over the transient frequency of the operational amplifier. Firstly, the reasons for the degradation of the attenuation are explained theoretically. Secondly, these conclusions are verified by simulations. These simulations were performed by spice-like circuit simulator MicroCap version 11.
一般来说,离散时间信号处理电路在输入端需要一个抗混叠滤波器,在输出端需要一个重构滤波器。本文介绍了几种有源滤波器的基本结构,并对其在运算放大器暂态频率上的衰减进行了比较。首先,从理论上解释了信号衰减退化的原因。其次,通过仿真验证了上述结论。这些模拟是由spice-like电路模拟器MicroCap版本11进行的。
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引用次数: 0
All-to-All Broadcast in WDM Linear Array with 3-length Extension 具有3长度扩展的WDM线性阵列中的全对全广播
Pub Date : 2022-05-06 DOI: 10.37394/23201.2022.21.9
K. Manoharan, M. Sabrigiriraj
All-to-all broadcast communication, distributing messages from each node to every other node, is a dense communication pattern and finds numerous applications in advanced computing and communication networks from the control plane to datacenters. In this article, a linear array is extended by directly linking all nodes which are separated by two intermediate nodes with additional fibers and this network is referred as linear array with 3-length extension. The wavelength allotment methods are proposed to realize all-to-all broadcast over WDM optical linear array with 3-length extension under multiple unicast routing model and the wavelength number needed atmost to establish all-to-all broadcast is determined. The wavelength number needed atmost to establish all-to-all broadcast in a linear array with 3-length extension is reduced by a minimum of 61% and a maximum of 66% when compared to a basic linear array. Similarly, the wavelength number needed atmost to establish all-to-all broadcast is reduced by a minimum of 24% and a maximum of 33% when compared to linear array with 2-length extension.
所有到所有的广播通信,将消息从每个节点分发到其他每个节点,是一种密集的通信模式,在从控制平面到数据中心的高级计算和通信网络中有许多应用。在本文中,用额外的光纤将中间两个节点隔开的所有节点直接连接起来,将线性阵列进行扩展,这种网络称为3长度扩展线性阵列。在多单播路由模型下,提出了在3长度扩展的WDM光线性阵列上实现全覆盖广播的波长分配方法,确定了建立全覆盖广播所需的波长数。与基本线性阵列相比,在具有3长度扩展的线性阵列中建立全对全广播所需的波长数最少减少61%,最多减少66%。同样,与具有2长度扩展的线性阵列相比,建立全对全广播所需的波长数最少减少了24%,最多减少了33%。
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引用次数: 2
An Empirical Investigation of the Electrical and Thermal Performance of Photovoltaic-thermal Hybrid Sensor (PV/T) 光电-热混合传感器(PV/T)电学和热学性能的实证研究
Pub Date : 2022-05-05 DOI: 10.37394/23201.2022.21.8
Ali Djegham, T. Djedid, Bouras Abdelkarim, Z. Driss
The combination photovoltaic-thermal solar collector produces at the same time electricity gratitude to photovoltaic solar energy and warmth gratitude to thermal energy because it is known that the traditional photovoltaic panel produces three times more heat than the electricity. The increase in warmth inside the module is one of the principal reasons of the reduced performance of photovoltaic solar panels. Thus the necessity for a thermal evacuation technique. The benefit of a hybrid technique is the cooling of the photovoltaic cells gratitude to the circulation of a fluid, which will be warmed during its passage via the sensor. The novelty of this study is to recover this thermal energy by heating or drying. Previous dryers worked with thermal sensors thanks to the greenhouse effect, which gives only heat. The purpose of this paper is the realization experimental of a PV/T sensor and so the examination of the impact of different parameters on the energy performance of the PV/T sensor. The impacts recommend that this kind of collector is a nicely alternative to photovoltaic modules and thermal collectors seated individually.
由于传统光伏板产生的热量是电能的三倍,因此光伏-热太阳能组合集热器同时对光伏太阳能产生电能和热能产生热量。组件内部热量的增加是光伏太阳能电池板性能下降的主要原因之一。因此,有必要采用热疏散技术。混合技术的好处是,由于流体的循环,光伏电池的冷却,流体在通过传感器的过程中会被加热。这项研究的新颖之处在于通过加热或干燥来回收这些热能。由于温室效应,以前的烘干机使用的是热传感器,而温室效应只产生热量。本文的目的是对PV/T传感器进行实验实现,从而考察不同参数对PV/T传感器能量性能的影响。这些影响表明,这种集热器是光伏组件和单独安装的热集热器的一个很好的替代方案。
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引用次数: 0
Arduino-based PID Control of Humidity in Closed Space by Pulse Width Modulation of AC Voltage 基于arduino的交流电压脉宽调制的密闭空间湿度PID控制
Pub Date : 2022-04-21 DOI: 10.37394/23201.2022.21.6
S. Nakamori
My previous work explored a method for constant temperature proportional-integral-derivative (PID) control in a closed space using an Arduino. Similarly, this paper proposes a method of PID control to keep the humidity constant in a closed space using Arduino. PID control by a pulse width modulation (PWM) signal with Arduino is used to keep the humidity constant due to the heat generated by an incandescent light bulb to which an AC voltage of 100 (V) is applied. Here, the humidity is measured using the temperature/humidity sensor DHT11. Specifically, the target value of humidity is set to 30 (%), and the experimental results of P, PD, PI, and PID controls are compared from the points of quick response and stationary performance. As an evaluation of stationary performance, the mean-square value of 1,000 data of the deviation (target value – measured humidity) is calculated, and the PID control is found to be the preferred control.
我之前的工作探索了一种在封闭空间中使用Arduino进行恒温比例积分导数(PID)控制的方法。同样,本文提出了一种利用Arduino进行PID控制的方法来保持封闭空间的湿度恒定。使用Arduino通过脉宽调制(PWM)信号进行PID控制,通过施加100 V交流电压的白炽灯产生的热量来保持湿度恒定。这里,湿度是使用温湿度传感器DHT11测量的。具体将湿度目标值设定为30(%),从快速响应和平稳性能方面比较P、PD、PI和PID控制的实验结果。作为对平稳性能的评价,计算了偏差(目标值-实测湿度)的1000个数据的均方值,发现PID控制是首选控制。
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引用次数: 0
Singular Perturbation Method Applied for BVP, IVP and Optimal Control to One Parameter Armature Controlled DC Servo Motor 奇异摄动法在单参数电枢控制直流伺服电机BVP、IVP及最优控制中的应用
Pub Date : 2022-03-05 DOI: 10.37394/23201.2022.21.5
Kishor Babu Gunti, Sree Krishnarayalu Movva
DC servo motor discrete model of one-parameter Singular Perturbation Method (SPM) is enlarged showing zero-order, first-order and second-order approximations. In this paper, a one parameter SPM based two time scale model is considered for evaluation. Now by applying this SPM a real time Boundary Value Problems (BVP), Initial Value Problem (IVP) and Optimal Control Problem (OCP) are premeditated. Such evaluated SPM have a boundary layer correction (BLC) solution and an outer series solution. To improve degenerate solution and to recover initial and boundary conditions a BLC solution of SPM is used. The DC servo-motor control model of second order approximation is carried out for BVP, IVP and OCP. The results thus obtained are presented in comparison to the precise solution. The efficacy of the present model is evaluated in MATLAB environment.
对单参数奇异摄动法(SPM)的直流伺服电机离散模型进行了放大,得到了零阶、一阶和二阶近似。本文考虑一种基于单参数SPM的双时间尺度模型进行评价。现在,应用该SPM方法可以预先考虑实时边值问题(BVP)、初值问题(IVP)和最优控制问题(OCP)。计算得到的SPM具有边界层校正解和外序列解。为了改进退化解并恢复初始条件和边界条件,采用了SPM的BLC解。建立了直流伺服电机对BVP、IVP和OCP的二阶逼近控制模型。并将所得结果与精确解作了比较。在MATLAB环境下对该模型的有效性进行了评价。
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引用次数: 0
Recognition of Bean Plants in Weeds Using Neural Networks 用神经网络识别杂草中的豆科植物
Pub Date : 2022-03-01 DOI: 10.37394/23201.2022.21.4
M. Aparicio, Tetyana Baydyk, E. Kussul, G. Velasco, Carlos Vera
The implementation of a random subspace classifier (RSC) neural network for the recognition of bean plants in weeds was proposed. The RSC neural classifier is based on the multilayer perceptron with a single layer of training connections, allowing a high speed training. The input of this classifier can be considered in various modes, for example, histograms of brightness, contrast, and orientation of micro contours. The RSC neural classifier has been developed for recognition and is applied to different tasks such as micromechanics, tissue recognition, and recognition of metallic textures. The RSC application can help automatize the industrial processes in agriculture. For this purpose, the computer vision based on neural networks can be used.
提出了一种随机子空间分类器(RSC)神经网络在杂草中识别豆类植物的方法。RSC神经分类器基于单层训练连接的多层感知器,可以实现高速训练。该分类器的输入可以考虑多种模式,例如微轮廓的亮度直方图、对比度直方图和方向直方图。RSC神经分类器已被开发用于识别,并应用于不同的任务,如微观力学,组织识别和金属纹理识别。RSC应用程序可以帮助实现农业工业过程的自动化。为此,可以使用基于神经网络的计算机视觉。
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引用次数: 0
Comparative Analysis of Vertical Nanotube Field Effect Transistor (NTFET) Based on Channel Materials for Low Power Applications 基于沟道材料的低功耗垂直纳米管场效应晶体管(NTFET)比较分析
Pub Date : 2022-02-26 DOI: 10.37394/23201.2022.21.3
Josephine Anucia A., D. Gracia, J. Moni D.
3D Vertical Nanotube Field Effect Transistors (NTFETs) with various channel materials are analysed for 5nm gate length (LG) in this research work. The DC and RF studies are performed on NTFET devices with Silicon, Gallium Nitride (GaN), and SiliconGermanium (SiGe) as channel materials. The impact of variation of channel length, channel thickness, and temperature analysis on these devices have been studied. The ION/IOFF ratio of Si-NTFET, GaN-NTFET and SiGe-NTFET are found to be 2.7×108^ , 1.08×10^9 , 1.69×10^8 respectively. GaN channel NTFET exhibits the lowest subthreshold swing (SS) of 33.1mV/dec with the highest cut-off frequency of 190 GHz. From the analysis, it is found that NTFET with GaN channel device outperforms the other two devices.
本文对不同沟道材料的三维垂直纳米管场效应晶体管(ntfet)进行了5nm栅极长度(LG)的分析。直流和射频研究是在以硅、氮化镓(GaN)和硅锗(SiGe)作为沟道材料的NTFET器件上进行的。研究了通道长度、通道厚度和温度分析对这些器件的影响。Si-NTFET、GaN-NTFET和SiGe-NTFET的离子/ off比分别为2.7×108^, 1.08×10^9, 1.69×10^8。GaN沟道NTFET的最低亚阈值摆幅(SS)为33.1mV/dec,最高截止频率为190 GHz。分析发现,采用GaN沟道器件的NTFET性能优于其他两种器件。
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引用次数: 0
Brief Notes on The Possibility of Copying Qubits in Quantum Systems 关于量子系统中复制量子比特的可能性的简要说明
Pub Date : 2022-02-10 DOI: 10.37394/23201.2022.21.2
A. Grigoryan, S. Agaian
Copying the quantum states is contradictory to classical information processing since the fundamental difference between classical and quantum information is that while classical information can be copied perfectly, quantum information cannot. However, this statement does not rule out the risk of building a device that can reproduce a set of quantum states. This paper investigates the naturally arising question of how well or under what conditions one can copy and measure an arbitrary quantum superposition of states. The CNOT and XOR operation-based quantum circuit is presented that exhibits entanglement of states and allows for measuring the doubled qubits.
复制量子态与经典信息处理是矛盾的,因为经典信息和量子信息的根本区别在于,经典信息可以被完美地复制,而量子信息则不能。然而,这一说法并不排除建造一种可以复制一组量子态的设备的风险。本文研究了一个自然产生的问题,即在什么条件下可以很好地复制和测量任意态的量子叠加。提出了一种基于CNOT和XOR运算的量子电路,该电路表现出态的纠缠,并允许测量双量子位。
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引用次数: 0
Generalized Galois and Fibonacci Matrices in Cryptographic Applications 广义伽罗瓦和斐波那契矩阵在密码学中的应用
Pub Date : 2022-02-07 DOI: 10.37394/23201.2022.21.1
A. Beletsky
The terms of the Galois matrices , as well as those bijectively associated with them the Fibonacci matrices connect by the operator of the right-hand transposition (that is, transposition to the auxiliary diagonal), are borrowed from the theory of cryptography, in which generators of pseudorandom number (PRN) widely use according to Galois and Fibonacci schemes (in configuration). A distinctive feature of both the and matrices is that the identical binary sequences can programmatically calculate the sequences formed by the PRN generators. The latter's constructions are based on linear feedback shift registers, implemented by software or hardware methods in Galois and Fibonacci architecture. The proposed generalized Galois matrices, discussed in the Chapter, significantly expand the variety of PRN generators. That is achieved both by increasing the number of generating elements (in the classical version used a single element ) and since generalized generators can construct not only using PRN but also polynomials, not necessarily (as in classical generators), which are primitive. The listed features of generalized Galois matrices provide PRN generators with significantly higher cryptographic security than generators based on conventional matrices.
伽罗瓦矩阵的项,以及那些双客观地与它们相关联的斐波那契矩阵由右转置算子(即转置到辅助对角线)连接,从密码学理论中借用,其中伪随机数(PRN)发生器根据伽罗瓦和斐波那契方案(在组态中)广泛使用。矩阵和矩阵的一个显著特征是相同的二进制序列可以通过编程计算由PRN生成器生成的序列。后者的结构基于线性反馈移位寄存器,在伽罗瓦和斐波那契体系结构中通过软件或硬件方法实现。本章讨论的广义伽罗瓦矩阵极大地扩展了PRN生成器的种类。这可以通过增加生成元素的数量来实现(在经典版本中使用单个元素),并且由于广义生成器不仅可以使用PRN,还可以使用多项式,而不一定(如经典生成器),这是原始的。广义伽罗瓦矩阵所列出的特征使得PRN生成器比基于传统矩阵的生成器具有更高的加密安全性。
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引用次数: 1
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