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Designing and optimizing an intelligent self-powered condition monitoring system for mining belt conveyor idlers and its application
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作者 Xuanbo JIAO Zhixia WANG +2 位作者 Wei WANG F.S.GU S.HEYNS 《Applied Mathematics and Mechanics(English Edition)》 2025年第9期1679-1698,共20页
Belt conveyors are extensively utilized in mining and power industries.In a typical coal mine conveyor system,coal is transported over distances exceeding 2 km,involving more than 20000 idlers,which far exceeds a reas... Belt conveyors are extensively utilized in mining and power industries.In a typical coal mine conveyor system,coal is transported over distances exceeding 2 km,involving more than 20000 idlers,which far exceeds a reasonable manual inspection capacity.Given that idlers typically have a lifespan of 1-2 years,there is an urgent need for a rapid,cost-effective,and intelligent safety monitoring system.However,current embedded systems face prohibitive replacement costs,while conventional monitoring technologies suffer from inefficiency at low rotational speeds and lack systematic structural optimization frameworks for diverse idler types and parameters.To address these challenges,this paper introduces an integrated,on-site detachable self-powered idler condition monitoring system(ICMS).This system combines energy harvesting based on the magnetic modulation technology with wireless condition monitoring capabilities.Specifically,it develops a data-driven model integrating convolutional neural networks(CNNs) with genetic algorithms(GAs).The conventional testing results show that the data-driven model not only significantly accelerates the parameter response time,but also achieves a prediction accuracy of 92.95%.The in-situ experiments conducted in coal mines demonstrate the system's reliability and monitoring functionality under both no-load and fullload conditions.This research provides an innovative self-powered condition monitoring solution and develops an efficient data-driven model,offering feasible online monitoring approaches for smart mine construction. 展开更多
关键词 intelligent safety monitoring SELF-POWERED magnetic modulation data driven model mining conveyor
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Multiparameter performance monitoring of pulse amplitude modulation channels using convolutional neural networks
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作者 Si-Ao Li Yuanpeng Liu +7 位作者 Yiwen Zhang Wenqian Zhao Tongying Shi Xiao Han Ivan B.Djordjevic Changjing Bao Zhongqi Pan Yang Yue 《Advanced Photonics Nexus》 2024年第2期75-89,共15页
A designed visual geometry group(VGG)-based convolutional neural network(CNN)model with small computational cost and high accuracy is utilized to monitor pulse amplitude modulation-based intensity modulation and direc... A designed visual geometry group(VGG)-based convolutional neural network(CNN)model with small computational cost and high accuracy is utilized to monitor pulse amplitude modulation-based intensity modulation and direct detection channel performance using eye diagram measurements.Experimental results show that the proposed technique can achieve a high accuracy in jointly monitoring modulation format,probabilistic shaping,roll-off factor,baud rate,optical signal-to-noise ratio,and chromatic dispersion.The designed VGG-based CNN model outperforms the other four traditional machine-learning methods in different scenarios.Furthermore,the multitask learning model combined with MobileNet CNN is designed to improve the flexibility of the network.Compared with the designed VGG-based CNN,the MobileNet-based MTL does not need to train all the classes,and it can simultaneously monitor single parameter or multiple parameters without sacrificing accuracy,indicating great potential in various monitoring scenarios. 展开更多
关键词 pulse amplitude modulation optical performance monitoring intensity modulation optical fiber communication neural network applications
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Multi-Functioning in Virtual Monitoring of Thin-Walled Bridges
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作者 Alexander Tesar 《Journal of Mechanics Engineering and Automation》 2012年第11期701-708,共8页
Multi-functioning in virtual monitoring and assessment of ultimate dynamics of thin-walled bridges is treated in present paper. The approach enables multiple functions in virtual monitoring of the bridges made of inte... Multi-functioning in virtual monitoring and assessment of ultimate dynamics of thin-walled bridges is treated in present paper. The approach enables multiple functions in virtual monitoring of the bridges made of integrated thin-walled members with their hierarchical configuration. Theoretical, numerical and experimental in situ assessments of the problem are presented. Some results of structural application are submitted. 展开更多
关键词 multi-functioning NONLINEARITIES optimization thin-walled bridge time response ultimate behavior virtual monitoring.
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Bio-Inspired Microwave Modulator for High-Temperature Electromagnetic Protection,Infrared Stealth and Operating Temperature Monitoring 被引量:3
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作者 Xuan Yang Yuping Duan +4 位作者 Shuqing Li Huifang Pang Lingxi Huang Yuanyuan Fu Tongmin Wang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2022年第2期124-135,共12页
High-temperature electromagnetic(EM) protection materials integrated of multiple EM protection mechanisms and functions are regarded as desirable candidates for solving EM interference over a wide temperature range.In... High-temperature electromagnetic(EM) protection materials integrated of multiple EM protection mechanisms and functions are regarded as desirable candidates for solving EM interference over a wide temperature range.In this work,a novel microwave modulator is fabricated by introducing carbonyl iron particles(CIP)/resin into channels of carbonized wood(C-wood).Innovatively,the spaced arrangement of two microwave absorbents not only achieves a synergistic enhancement of magnetic and dielectric losses,but also breaks the translational invariance of EM characteristics in the horizontal direction to obtain multiple phase discontinuities in the frequency range of 8.2-18.0 GHz achieving modulation of reflected wave radiation direction.Accordingly,CIP/C-wood microwave modulator demonstrates the maximum effective bandwidth of 5.2 GHz and the maximum EM protection efficiency over 97% with a thickness of only 1.5 mm in the temperature range 298-673 K.Besides,CIP/C-wood microwave modulator shows stable and low thermal conductivities,as well as monotonic electrical conductivity-temperature characteristics,therefore it can also achieve thermal infrared stealth and working temperature monitoring in wide temperature ranges.This work provides an inspiration for the design of high-temperature EM protection materials with multiple EM protection mechanisms and functions. 展开更多
关键词 Microwave modulator Electromagnetic protection High temperatures Temperature monitoring Carbonized wood
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An H_(∞)Observer-based 3-D Thermal Monitoring Method for Multi-chip IGBT Modules with Robustness to Model Parameter and Power Loss Uncertainty
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作者 Ye Tian Bowen Liu +6 位作者 Chushan Li Bowei Chen Bin Guo Yongjun Zheng Haoze Luo Wuhua Li Xiangning He 《Protection and Control of Modern Power Systems》 2025年第3期125-145,共21页
Dynamic temperature monitoring at critical locations of IGBT modules is a key means to improve the reliability of high-power converters.However,most ex-isting thermal model-based methods suffer from temper-ature estim... Dynamic temperature monitoring at critical locations of IGBT modules is a key means to improve the reliability of high-power converters.However,most ex-isting thermal model-based methods suffer from temper-ature estimation errors due to model parameter varia-tions and loss calculation errors.To address this problem,based on the reduced-order thermal model,an H_(∞)ob-server-based robust 3-D thermal monitoring method for IGBT modules is proposed in this paper.Through the optimized design of the observer feedback gain,the thermal model and real-time temperature information are effectively combined,which reduces the temperature estimation error in the worst case.Thus,the proposed method is more robust to model parameter uncertainty and loss error than the conventional temperature ob-servers.Experiment validations of the proposed H_(∞)ob-server and conventional observers are provided.The results demonstrate that the proposed observer achieves the highest temperature estimation accuracy under vari-ous system uncertainties,making it an effective solution for reliable online thermal monitoring of IGBT modules over the whole life cycle. 展开更多
关键词 IGBT module UNCERTAINTY ROBUSTNESS junction temperature thermal monitoring reliability
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Multilevel Pattern Mining Architecture for Automatic Network Monitoring in Heterogeneous Wireless Communication Networks 被引量:8
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作者 Zhiguo Qu John Keeney +2 位作者 Sebastian Robitzsch Faisal Zaman Xiaojun Wang 《China Communications》 SCIE CSCD 2016年第7期108-116,共9页
The rapid development of network technology and its evolution toward heterogeneous networks has increased the demand to support automatic monitoring and the management of heterogeneous wireless communication networks.... The rapid development of network technology and its evolution toward heterogeneous networks has increased the demand to support automatic monitoring and the management of heterogeneous wireless communication networks.This paper presents a multilevel pattern mining architecture to support automatic network management by discovering interesting patterns from telecom network monitoring data.This architecture leverages and combines existing frequent itemset discovery over data streams,association rule deduction,frequent sequential pattern mining,and frequent temporal pattern mining techniques while also making use of distributed processing platforms to achieve high-volume throughput. 展开更多
关键词 automatic network monitoring sequential pattern mining episode discovery module
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Multiple-impairment monitoring for optical duobinary system based on delay-tap asynchronous sampling 被引量:1
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作者 赖俊森 杨爱英 孙雨南 《Journal of Beijing Institute of Technology》 EI CAS 2013年第2期246-249,共4页
A technique using artificial neural networks trained with parameters derived from delay tap plots for optical performance monitoring in 40 Gbit/s duobinary system is demonstrated. Firstly, the optical signal is delay ... A technique using artificial neural networks trained with parameters derived from delay tap plots for optical performance monitoring in 40 Gbit/s duobinary system is demonstrated. Firstly, the optical signal is delay tap sampled to obtain two-dimensional histogram, known as delay tap plots. Secondly, the features of delay tap plots are extracted to train the feed forward, three-layer preceptor structure artificial neural networks. Finally, the outputs of trained neural network are used to monitor optical duobinary signal impairments. Simulation of optical signal noise ratio ( OSNR), chromatic dispersion (CD), and differential group delay (DGD) monitoring in 40 Gbit/s optical duo- binary system is presented. The proposed monitoring scheme can accurately identify simultaneous impairments without requiring synchronous sampling or data clock recovery. The proposed technique is simple, cost-effective and suitable for in-service distributed OPM. 展开更多
关键词 optical performance monitoring (OPM) duobinary modulation delay tap sampling
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A signal-amplified whole-cell biosensor for sensitive detection of Hg^2+ based on Hg^2+-enhanced reporter module 被引量:1
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作者 Dan Wang Yanan Zheng +4 位作者 Liudan Wei Na Wei Xiaosu Fan Shan Huang Qi Xiao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2020年第10期93-98,共6页
A signal-amplified mercury sensing biosensor with desired sensitivity was developed through firstly using the GFP mutant with fluorescence increasing response towards Hg^2+ as the reporter module.The developed biosens... A signal-amplified mercury sensing biosensor with desired sensitivity was developed through firstly using the GFP mutant with fluorescence increasing response towards Hg^2+ as the reporter module.The developed biosensor showed response for Hg^2+ in a relatively wide range of 1–10,000 nmol/L,and the detection limit was improved one or two orders of magnitude in comparison with most metal-sensing biosensors in similar constructs.In addition,the biosensor could distinguish Hg^2+ easily from multiple metal ions and displayed strong adaptability to extensive p H conditions (pH 4.0–10.0).More importantly,the developed biosensor was able to provide an initial assessment of Hg^2+ spiked in the environmental water with the recoveries between 85.70%and 112.50%.The signal-amplified strategy performed by the modified reporter module will be widely applicable to many other wholecell biosensors,meeting the practical requirements with sufficient sensing performance. 展开更多
关键词 Mercury sensing biosensor Signal-amplified Reporter module Environmental samples monitoring
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Quality monitoring and biases estimation of BOC navigation signals
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作者 ZHAO Hongwei ZHANG Zichun +1 位作者 LUO Xianzhi WANG Qiuping 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2019年第3期474-484,共11页
Many safety-critical applications that utilize the global navigation satellite system (GNSS) demand highly accurate positioning information, as well as highly integrity and reliability. Due to GNSS signals are easily ... Many safety-critical applications that utilize the global navigation satellite system (GNSS) demand highly accurate positioning information, as well as highly integrity and reliability. Due to GNSS signals are easily distorted by the interferences or disturbances, the signal quality monitoring (SQM) is necessary to detect the presence of dangerous signal distortions. In this paper, we developed an SQM software for binary offset carrier (BOC) modulated navigation signals. Firstly, the models of BOC signal with ideal and distortion are presented respectively. Then the architecture of SQM software is proposed. Moreover, the effect of the white gaussian noise (WGN) and the front-end filter on the correlation peak of the receiver is analyzed. Finally, the biases induced by the signal distortion are evaluated. The experiments simulate the relationships between the code phase shift and the normalized correlation value in the case of the signal digital distortion and the analog distortion. The simulation results demonstrate that the proposed SQM method can effectively monitor the signal distortion and accurately estimate the correlation peak deviation caused by the distortion. 展开更多
关键词 SIGNAL quality monitoring (SQM) binary OFFSET carrier (BOC) modulation biases estimation SIGNAL distortion correlation PEAK
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Analysis of electro-optical intensity modulator for bunch arrival-time monitor at SXFEL
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作者 Jin-Guo Wang Xiao-Qing Liu +3 位作者 Lie Feng Wen-Yan Zhang Xing-Tao Wang Bo Liu 《Nuclear Science and Techniques》 SCIE CAS CSCD 2019年第1期1-9,共9页
A bunch arrival-time monitor(BAM) based on an electro-optical intensity modulation scheme is currently under development at Shanghai Soft X-ray Free-Electron Laser to meet the high-resolution requirements for bunch st... A bunch arrival-time monitor(BAM) based on an electro-optical intensity modulation scheme is currently under development at Shanghai Soft X-ray Free-Electron Laser to meet the high-resolution requirements for bunch stability. The BAM uses a radio frequency signal generated by a pickup cavity to modulate the reference laser pulses in an electro-optical intensity modulator(EOM), and the bunch arrival-time information is derived from the amplitude change of the laser pulse after laser pulse modulation.EOM is a key optical component in the BAM system.Through the basic principle analysis of BAM, many parameters of the EOM are observed to affect the measurement resolution of the BAM system. Therefore, a systematic analysis of the EOM is crucial. In this paper, we present two schemes to compare and analyze an EOM and provide a reference for selecting a new version of the EOM. 展开更多
关键词 BUNCH arrival-time monitor (BAM) Soft X-ray Free-Electron Laser (SXFEL) High resolution ELECTRO-OPTICAL intensity modulator (EOM)
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Hamamatsu’s Products for Optical Inspection,Metrology and Monitoring to Improve Yield and Accuracy for Semiconductor Processes
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作者 Chenghao Xiang Xusheng Zhou 《Journal of Microelectronic Manufacturing》 2019年第1期13-18,共6页
Pursuing small critical dimensions(i.e.14 nm or below)and high integration bring us lots of physical defects causing low yield and functionality failures for foundries.Under this circumstance,inspection,metrology and ... Pursuing small critical dimensions(i.e.14 nm or below)and high integration bring us lots of physical defects causing low yield and functionality failures for foundries.Under this circumstance,inspection,metrology and monitoring technologies are unprecedentedly vital for development of semiconductor industry.Optical and electron beam solutions are the most common two methods in semiconductor manufacturing.Hamamatsu Photonics is now aiming at optical inspection,metrology and monitoring systems market by providing light sources,photodetectors and failure analysis systems for semiconductor equipment manufacturers,foundries and research institutions.In this paper,features and potential applications of light sources,photodetectors(like image sensors,photomultiplier tubes/modules,silicon photomultipliers(modules),(avalanche)photodiodes(arrays)and so on),with the wavelengths ranging from UV to Infrared,are mainly discussed.In addition,Hamamatsu’s star product– failure analysis system to quickly locate faults or defects are introduced.In conclusion,Hamamatsu Photonics is dedicated to develop large varieties of light sources and optical sensors/detector/modules along with failure analysis systems and willing to improve the development of semiconductor and related industries,especially in China. 展开更多
关键词 optical semiconductor inspection/metrology/monitoring solutions image sensor light sources mini-spectrometer PHOTOMULTIPLIER tubes/modules
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环城水系水质在线监测系统的设计
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作者 张玮 庞宇娟 +4 位作者 王辉 关丽 卞紫嫣 赵明宇 李佳畅 《物理通报》 2025年第8期150-154,共5页
环城水系水质在线监测系统的设计包括水质信息采集端、云服务器端、信息交互客户端.在线信息采集端采用STM32单片机作为微控制器,通过代码编程对其进行控制,而后通过GPRS模块将水质传感信息上传到云服务器上.设计的系统不仅能够完成对... 环城水系水质在线监测系统的设计包括水质信息采集端、云服务器端、信息交互客户端.在线信息采集端采用STM32单片机作为微控制器,通过代码编程对其进行控制,而后通过GPRS模块将水质传感信息上传到云服务器上.设计的系统不仅能够完成对于环城水系多个位置水质数据的实时监测,同时能够将水质监测数据通过互联网进行收发,以此实现更多的拓展功能;且设计客户端来完成人与数据之间的交互,有利于对水质数据进行更合理、直观的分析. 展开更多
关键词 物联网 STM32单片机 水质监测 水体传感器 GPRS模块 LABVIEW
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体育运动训练中手持式RFID血糖传感器设计
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作者 邱增成 吴豪 苗凤娟 《齐齐哈尔大学学报(自然科学版)》 2025年第1期22-26,共5页
设计一种手持式RFID血糖传感器,应用于体育运动训练中对运动员的血糖进行实时监测。将RFID电子标签与STM32微处理器嵌入到血糖传感器中,需要采集运动员的血糖数值时,通过线圈激活RFID标签与传感器,经微处理器将传感器的数据写入RFID标... 设计一种手持式RFID血糖传感器,应用于体育运动训练中对运动员的血糖进行实时监测。将RFID电子标签与STM32微处理器嵌入到血糖传感器中,需要采集运动员的血糖数值时,通过线圈激活RFID标签与传感器,经微处理器将传感器的数据写入RFID标签。需要读出血糖数值时,可无线激活并读取传感器标签中保存的运动员血糖数值,并将具体数值显示在OLED液晶屏上和PC端远程数据平台,不需要使用时使整个电路处于修眠状态,极大程度提高了运动员血糖采集的效率,同时实现了无源、低成本、快速检测。 展开更多
关键词 STM32 RFID模块 血糖浓度监测 无线通信 OLED液晶显示 上位机
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基于阵列波导光栅的IGBT功率模块结温监测 被引量:2
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作者 高礼玉 栾洪洲 +2 位作者 李天琦 黄欣欣 张锦龙 《电工技术学报》 北大核心 2025年第6期1796-1804,共9页
高压、大功率型绝缘栅双极型晶体管(IGBT)是柔性直流输电网实现电能转换的核心组件,而高温是导致工程中IGBT模块的实际运行寿命远低于设计指标的最主要原因,因此实时监测IGBT模块内部温度是提高IGBT模块寿命、保证电网柔性直流输电正常... 高压、大功率型绝缘栅双极型晶体管(IGBT)是柔性直流输电网实现电能转换的核心组件,而高温是导致工程中IGBT模块的实际运行寿命远低于设计指标的最主要原因,因此实时监测IGBT模块内部温度是提高IGBT模块寿命、保证电网柔性直流输电正常运行的重要手段。该文提出一种基于阵列波导光栅(AWG)的IGBT温度监测系统,首先进行IGBT模块热仿真,根据仿真结果得到的IGBT模块运行时的温度分布规律来探究传感器部署位置。其次利用AWG通道的波分特性对传感器反射波长进行解调,多通道、高精度的AWG解调可以大幅度降低IGBT结温监测成本,提高系统精度,利用波导布拉格光栅(WBG)传感器反射波长与被测芯片表面之间的温度关系推导出芯片的结温信息。最后通过对照实验验证了系统的可靠性。实验数据表明,该结温在线监测方法能准确获取IGBT内部芯片的动态结温,且温度动态波动幅度小于0.6%。 展开更多
关键词 IGBT模块 结温监测 波导布拉格光栅 阵列波导光栅
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基于开通延时变化的多芯片IGBT模块部分芯片失效监测方法
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作者 罗丹 陈民铀 +2 位作者 赖伟 李涵锐 夏宏鉴 《重庆大学学报》 北大核心 2025年第3期14-26,共13页
多芯片绝缘栅极双极型晶体管(insulated gate bipolar transistor,IGBT)模块被广泛应用于大功率变换器中,对其进行状态监测可以有效提高电力设备可靠性。文中提出了一种基于开通延时变化的多芯片IGBT模块部分芯片故障检测方法,分析了芯... 多芯片绝缘栅极双极型晶体管(insulated gate bipolar transistor,IGBT)模块被广泛应用于大功率变换器中,对其进行状态监测可以有效提高电力设备可靠性。文中提出了一种基于开通延时变化的多芯片IGBT模块部分芯片故障检测方法,分析了芯片失效对开通过程的影响,指出了芯片失效与开通延时的关系,基于开通延时与失效芯片数的映射关系提出了对应的故障监测方法,并通过实验验证了方法的有效性。实验结果表明:文中所提方法可用于多芯片模块的健康状态监测,对提高变流器的运行可靠性具有重要意义。 展开更多
关键词 故障诊断 IGBT 多芯片模块 开通延时 状态监测
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机器跳数优化对鼻咽癌容积旋转调强放疗的影响研究
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作者 曾华驱 张慧 吴齐兵 《医疗卫生装备》 2025年第2期56-62,共7页
目的:探讨机器跳数优化对鼻咽癌容积旋转调强放疗的影响。方法:回顾性选取2022年10月至2023年3月在某院经病理诊断为鼻咽癌的21例患者,为每位患者设计双弧容积调强放疗计划,通过光子优化算法进行计划优化,不使用机器跳数目标(monitor un... 目的:探讨机器跳数优化对鼻咽癌容积旋转调强放疗的影响。方法:回顾性选取2022年10月至2023年3月在某院经病理诊断为鼻咽癌的21例患者,为每位患者设计双弧容积调强放疗计划,通过光子优化算法进行计划优化,不使用机器跳数目标(monitor unit objective,MUO)工具进行设计,将该计划命名为base。保持计划base的参数设置,仅使用MUO工具并将其Maximum MU参数值设置为计划base的总机器跳数的30%,Strength参数值分别设置为50、80和100后进行重新优化,得到计划S50、S80和S100。比较计划S50、S80和S100与计划base的靶区和危及器官剂量分布、机器跳数、出束时间以及γ通过率。采用SPSS 17.0软件进行统计学分析。结果:在计划S100中只有4例患者的PCTV2靶区D98%剂量相比于计划base下降幅度超过4%。在计划S80中只有2例患者的PGTV和PGTVnd的Dmax剂量以及PCTV2的D98%剂量相比于计划base下降幅度超过3%,但下降幅度未超过4%,其他靶区剂量参数变化幅度多数小于2%。相对于计划base,计划S50、S80、S100均会增加脑干的Dmax,差异有统计学意义(P均<0.05),但最大增量不超过1.5%。计划S50可以降低左右腮腺的D50%和Dmean,计划S80可以降低左右腮腺的Dmean和左腮腺的D50%,差异有统计学意义(P<0.001),计划S100相对于计划base会增大左右腮腺的D50%和Dmean、脊髓的Dmax,差异有统计学意义(P均<0.05)。计划S80和S100相对于计划base会提高甲状腺的V40,差异有统计学意义(P<0.05)。计划S50、S80和S100相对于计划base机器跳数分别平均降低5.1%、21.5%和30.9%,4种计划的平均出束时间基本保持在2.5 min。在1%/1 mm条件下,计划base、S50、S80和S100的γ通过率依次增加。结论:将机器跳数优化应用于鼻咽癌容积旋转调强放疗中可以在保证靶区剂量覆盖和危及器官保护的同时,有效减少计划的机器跳数,提高1%/1 mm条件下的γ通过率。 展开更多
关键词 鼻咽癌 容积旋转调强放疗 机器跳数优化 机器跳数 MUO工具
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基于LoRa技术的电力检修作业挂接地线智能监测系统 被引量:1
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作者 黄光斌 《兵工自动化》 北大核心 2025年第6期56-61,共6页
针对接触网检修作业中人工监测挂接地线状态弊端,设计基于长距离(long range,LoRa)技术的接触网检修作业挂接地线智能监测系统。通过监测层、传输层、控制层和应用层设计智能监测系统总体结构,在该结构下通过接地监测模块、LoRa无线通... 针对接触网检修作业中人工监测挂接地线状态弊端,设计基于长距离(long range,LoRa)技术的接触网检修作业挂接地线智能监测系统。通过监测层、传输层、控制层和应用层设计智能监测系统总体结构,在该结构下通过接地监测模块、LoRa无线通信模块和ARM控制芯片设计系统硬件结构;构建三自由度数学模型,计算不同方向挂接地线的输电线路自由度;利用线路自由度判断线路舞动幅度,并依据线路载流量大小判断接地线中电流情况,根据判断结果查看是否符合挂接线路安全运行条件,并通过LoRa无线通信模块对监测数据进行传输,发送至系统应用层调度中心与检修人员手持终端。实验结果表明:该系统可准确监测挂接地线状态,且具备较好的远距离传输性能。 展开更多
关键词 LoRa技术 接触网检修作业 挂接地线 智能监测系统 无线通信模块 监测数据传输
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基于线性复杂度自注意力机制的非侵入式负荷监测方法
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作者 廖耀华 常艳平 +3 位作者 王恩 魏龄 潘国兵 王海鹏 《电测与仪表》 北大核心 2025年第8期197-205,共9页
非侵入式负荷监测(non-intrusive load monitoring,NILM)技术对于实现智慧用电与管理具有重要意义。针对现有的非侵入式负荷监测方法在高噪声环境下对特征相似电器以及微小负荷变化监测精度不足的难题,提出了一种基于单位力操作视觉变... 非侵入式负荷监测(non-intrusive load monitoring,NILM)技术对于实现智慧用电与管理具有重要意义。针对现有的非侵入式负荷监测方法在高噪声环境下对特征相似电器以及微小负荷变化监测精度不足的难题,提出了一种基于单位力操作视觉变换器的非侵入式负荷监测(non-intrusive load monitoring based on unit force operated vision transformer,UFONILM)模型的非侵入式负荷监测的深度学习框架。UFONILM模型的单位力操作(unit force operated,UFO)模块通过层归一化和一系列卷积层有效地提取和利用了多尺度的时间序列数据,特征。在标准的UK-DALE数据集上进行的实验显示,UFONILM模型在准确性和F1得分上均优于现有方法,特别是在细粒度的负荷监测场景中。研制了基于UFONILM模型的嵌入式系统,实现了边缘计算的非侵入式负荷监测,可实时监测和响应电网中的异常用电行为,如违规充电事件。实验检测证明,UFONILM模型嵌入式非侵入式负荷监测方法在监测效率方面具有显著的提升,具有高效、便捷安装、可扩展等特点。 展开更多
关键词 智能电网 边缘侧 非侵入式负荷监测 深度学习 UFO模块
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基于FPGA高速Serdes接口的收发模块握手协议设计 被引量:3
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作者 刘正强 洪徐健 孙卫红 《电子科技》 2025年第3期82-87,共6页
为提升FPGA(Field Programmable Gate Array)高速Serdes通讯稳定性,实时监控其通讯状态,文中设计了一种基于K码控制字符的通讯协议。创建标志用户数据帧起始的动态SOF(Start of Frame)和标志结束的静态EOF(End of Frame)两种K码控制字符... 为提升FPGA(Field Programmable Gate Array)高速Serdes通讯稳定性,实时监控其通讯状态,文中设计了一种基于K码控制字符的通讯协议。创建标志用户数据帧起始的动态SOF(Start of Frame)和标志结束的静态EOF(End of Frame)两种K码控制字符,有利于通讯的连续性检测。创建TLINK(Transmit Link)、BLINK(Back Link)的K码控制字符,其中TLINK控制字符在Serdes的发送端进行定期发送,接收端收到TLINK控制字符后,控制本方的Serdes发送端优先输出BLINK控制字符进行应答,以建立通讯双方之间的握手关系,有利于通讯的超时和状态检测。校验独立于SOF、EOF之间的用户数据,进行CRC32(Cyclic Redundancy Check32)计算,有利于通讯的误码检测。实验结果表明,该协议可实现对Serdes链路的丢帧数量、误码数量、超时数量及通讯断开时长进行准确监控,最小时间精度为10μs。 展开更多
关键词 FPGA SERDES 收发模块 K码 握手协议 通讯监控SOF EOF
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基于LoRa网络的实验室多节点安全监测与预警系统 被引量:1
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作者 秦海亭 金传双 +2 位作者 刘东升 王博伟 周塔 《实验室研究与探索》 北大核心 2025年第6期217-221,233,共6页
为了提升实验室安全监测与预警能力,开发了一套基于LoRa网络的多节点实验室安全监测与预警系统。该系统由1个主控节点和3个子节点组成。主控节点负责火焰检测和门禁识别,而子节点则配置了温湿度、火焰和一氧化碳等传感器。子节点通过LoR... 为了提升实验室安全监测与预警能力,开发了一套基于LoRa网络的多节点实验室安全监测与预警系统。该系统由1个主控节点和3个子节点组成。主控节点负责火焰检测和门禁识别,而子节点则配置了温湿度、火焰和一氧化碳等传感器。子节点通过LoRa网络将各类传感器的实时数据传输至主控节点,主控节点利用NB-LoT和WiFi模块,通过MQTT协议将数据上传至云端。云端对数据进行分析。并评估安全状况。一旦发现火灾隐患,系统将立即发出预警信息。通过开发的阿里云Web端和机智云手机端APP,以便用户调整传感器的阈值,实现对实验室环境的远程监测和控制。系统测试结果表明,该系统能够很好地感知实验室的复杂环境数据,适用于面向不同类型的实验室,具有广泛的应用前景,同时,各节点独立运行,安装简便,显著提升了系统的使用范围。 展开更多
关键词 远距离无线电模块 实验室安全监控 云端协同 信息感知 多节点通信 机器视觉
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