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关键词： 自动化电力调度   光纤通信   人工智能  

摘要： 文章针对现有电力调度系统的不足,提出一种创新的自动化电力调度系统设计方案。该方案以光纤通信网络为基础,集成了先进的传感测量、大数据分析、人工智能等关键技术,实现电网全方位感知、智能决策与精准控制一体化。通过高保真仿真平台的实验验证,新方案较传统调度方式在经济性、健壮性、可靠性等方面取得了显著提升。

关键词： 分散控制系统   RS485   光模组   光纤保护电路   远程通信  

摘要： 在DCS系统中,DPU和I/O卡之间的RS485通信存在着电子信号衰减,易受电磁干扰且数据需长距离传送等问题。本文设计模块主要由光模块、RS485通信芯片以及保护电路组成,光模块能够将RS485通信芯片发出的电信号转换成光信号,从而实现DPU与远程I/O卡件之间的数据交互。实践证明,此模块能保证DCS主控制器和插卡之间的可靠通信,是一种实用的解决方案。

关键词： 故障诊断   轴承   深度残差收缩网络   Transformer编码器  

摘要： 针对轴承故障在复杂工况环境中诊断准确率低和泛化性能弱的问题,提出了一种基于深度残差收缩网络(deep residual shrinkage network,DRSN)融合Transformer编码器的轴承故障诊断方法。首先,采用DRSN通过软阈值模块自动去掉振动信号中的噪声信息,并使用注意力机制增强提取到的特征;然后,采用Transformer编码器来进一步解决振动信号中的长期依赖性问题;最后,利用Softmax函数实现多故障模式识别。在凯斯西储大学轴承数据集上通过不同噪声等级对提出的模型进行测试,实验结果表明,该方法实现了对轴承故障分类,强噪声环境下准确率更高,训练时间更快。

关键词： 传感器   光纤传感器   光纤布拉格光栅   表面等离激元   痕量离子检测  

摘要： 为实现特异性、超痕量、原位的重金属汞离子检测,提出一种基于适配体和磁性纳米粒子增强倾斜光纤布拉格光栅-表面等离激元共振(TFBG-SPR)汞离子传感器。首先,在倾斜光纤布拉格光栅包层区域溅射厚度合适的金膜以激发表面等离激元共振,在探针末端镀金从而形成反射式传感结构。然后,采用具有胸腺嘧啶(T)碱基失配的适配体修饰TFBG-SPR栅区,进行特异性汞离子识别。最后,选择链霉亲和素包被的磁性纳米粒子作为信号放大标签,以提高离子检测性能。汞离子与T碱基作用激活适配体序列,连接磁性纳米粒子,传感器表面折射率发生变化,TFBG-SPR包层模式的振幅产生响应。结果表明:采用差分幅度解调,传感器对汞离子的检测极限为0.5 pmol/L,检测范围为1 pmol/L~10μmol/L,所提传感器具备良好的特异性以及再生性,同时通过测量临床样品的回收率,可以证实其在即时、快速检测领域中的应用前景。

关键词： 图像处理   ZYNQ   视觉传感系统   Vivado HLS   多核并行处理   视频图像处理  

摘要： 目前,在青霉素工业生产中,人工检测是青霉素结晶状态以及发酵液高度检测的主要方式,这种方式成本高、自动化水平低且易造成误判,对青霉素产量和品质有很大影响。针对此种情况,文中设计了一种基于AMP架构的青霉素结晶状态与发酵液高度检测系统。该系统以ZYNQ-7000作为可重构嵌入式平台。在PL部分,利用Vivado HLS工具实现结晶状态、发酵液高度检测的图像预处理算法IP核设计,并搭建出视觉传感系统的硬件平台。在PS部分,系统采用双核AMP(非对称多处理)运行模式,完成结晶状态检测、发酵液高度检测算法处理与以太网视频传输、图像存储功能的并行处理。实验结果表明:该系统支持2种检测模式的切换,可实现对工业生产中青霉素结晶状态与发酵液高度的精确检测与视频数据的实时传输。

关键词： 热电偶   冷端补偿盒   校准  

摘要： 热电偶测温系统中,冷端补偿是影响测量准确度的关键因素之一,目前在反应堆工程试验研究中,使用冷端补偿盒对热电偶进行补偿。冷端补偿盒为非标准化产品。结合热工试验对温度量值准确性与溯源性的要求,通过对热电偶冷端补偿及冷端补偿盒工作原理进行研究,并采用实验室计量标准装置进行冷端补偿效果对比验证,提出一种热电偶冷端补偿盒校准方法。结果表明,该校准方法准确可靠,冷端补偿盒的补偿效果与实验室热电偶校准用冰瓶补偿效果具有一致性,可为实验室热电偶校准提供新思路。

关键词： PCB   AI技术   缺陷检测   目标检测   YOLOv7  

摘要： 随着电子信息技术的飞速发展,印制电路板(Printed-Circuit Board,PCB)作为电子产品的重要电子互联组件,在现代电子信息产品中发挥着不可或缺的作用。随着时代的进步,现代印刷电路板缺陷检测的重要性日益凸显,而传统的PCB缺陷检测方法则存在效率低下、漏检率高等问题。针对这些问题,文章构建了基于YOLOv7目标检测算法的印制电路板缺陷检测系统。该系统由图像采集模块、YOLOv7目标检测模块、PCB缺陷数据集成模块三大部分组成。通过实验和实际生产线测试,文章提出的系统在PCB缺陷检测上取得了良好的效果。

关键词： CCD   coating   comfort properties   flame-retardant   protective clothing   RSM   silica   zinc oxide  

摘要： This study reports process optimization studies of silica and zinc oxide-based flame-retardant (FR) coatings on cotton fabric for protective clothing and enhanced flammability properties. The experiments were designed by central composite design (CCD) using response surface methodology (RSM) to assess the synergistic protective effects of silica and zinc oxide FR coating. These prepared sols were coated on cotton fabrics by a simple dip dry cure process. The resulting FR-finished fabrics were characterized by SEM, mechanical properties, flame retardancy, and air permeability. SEM results confirmed the homogenous spreading of particles on cotton fabrics. From TGA results, it was noticed that the incorporation of silica and ZnO in the prepared nano-sols results in improved thermal stability of the FR-finished fabrics. These sol-gel-treated FR cotton fabrics showed excellent comfort properties, which shows their suitability for fire-retardant protective clothing. RSM analysis proved that the predicted values are in good agreement with the experimental values since R2 values for time to ignite, flame spread time, and air permeability were greater than 0.90. The optimized concentration of silica and ZnO in FR-finished fabrics was found to be 0.302% and 0.353%, respectively, which was further confirmed by confirmatory experiments. The optimization analysis successfully optimized the process for synergistic coating of silica and zinc oxide nanoparticles for enhanced flammability properties of FR cotton fabric for protective clothing.

关键词： 无线电通信  

ISBN: (纸本)9787118118124

摘要： 本书针对无线传感器网络领域内的基本概念、新理念和新研究成果等, 提供一个全面的指南, 不仅对这一领域的核心问题进行了详细的论述, 而且对一些细节问题也提供了价值的资料。其重点关注内容包括信息处理技术、网络拓扑、网络覆盖、MAC协议和路由协议、网络自组织协议、网络QoS、嵌入式OS技术、资源分配技术、低功耗技术、网络安全技术、WSN中间件技术、移动WSN技术等。

关键词： Biological residue   Sustainable energy production   Clean energy technology   Heterogeneous solid base catalyst   Central composite design   Response surface methodology  

摘要： The use of biomass as a renewable, sustainable, and eco-friendly energy source is now widely recognized as a potential solution for a variety of environmental problems. To develop biodiesel production, cost-effective feedstocks such as agricultural waste, food waste, and non-edible/waste cooking oil were utilized. A heterogeneous solid base catalyst was synthesized by calcining a mixture of waste golden apple snail shell (Pomacea canaliculata) and cultivated (Musa sapientum) banana peel. In transesterification process, potassium oxide (K2O) derived from banana peel is used as a cocatalyst to improve the catalytic activity of calcium oxide (CaO) catalyst derived from waste shell. The innovative CaO-K2O catalyst was investigated by X-ray diffraction (XRD), X-ray fluorescence (XRF) and the Brunauer-Emmett-Teller (BET) technique. The morphology and elemental composition of calcium (Ca), potassium (K), and oxygen (O) in the catalyst were validated by field emission-scanning electron microscopy (FE-SEM) and energy dispersive X-ray spectroscopy (EDX). The CaO catalyst exhibited a BET surface area of 10.88 m(2)/g, which was enhanced to 14.62 m(2)/g upon combination with K2O. The Hammett indicator of CaO catalyst fell between 7.2 < H_< 9.8. However, the CaO-K2O catalyst exhibited a higher value of 15.0 < H_< 18.4, which could be attributed to the phase transition from CaO to CaO-K2O. To investigate the effects of catalyst concentration, ethanol/oil molar ratio, and transesterification time on the yield of fatty acid ethyl ester (FAEE). The optimal conditions for FAEE synthesis were determined using a central composite design (CCD) approach with response surface methodology (RSM). The regression equation obtained for the CCD model has a determination coefficient (R-2) of 0.9921, indicating that this model is well-fitted. At 3.69 wt% catalyst concentration, 19.48:1 ethanol/oil molar ratio, and 1.80 h transesterification time, the highest FAEE yield from Jatropha Curcas oil (JC