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Parameters matching and optimization of parallel hybrid electric vehicle powertrain 认领 引用 被引量：8
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作者 陈勇 Chen Xiaokai Lin Yi 《High Technology Letters》 EI CAS 2010年第1期34-38,共5页
Aiming at the development of parallel hybrid electric vehicle （PHEV） powertrain, parameter matching and optimization are presented, According to the performance of PHEV, the optimization range of engine, motor, driv... Aiming at the development of parallel hybrid electric vehicle （PHEV） powertrain, parameter matching and optimization are presented, According to the performance of PHEV, the optimization range of engine, motor, driveline gear ratio and battery parameters are determined. And then a two-level optimization problem is formulated based on analytical target cascading （ATC）. At the system level, the optimization of the whole vehicle fuel economy is carried out, while the tractive performance is defined as the constraints. The optimized parameters are cascaded to the subsystem as the optimization targets. At the subsystem level, the final drive and transmission design are optimized to make the ratios as close to the targets as possible. The optimization result shows that the fuel economy had improved significantly, while the tractive performance maintains the former level. 展开更多
关键词 parallel hybrid electric vehicle （PHEV） parameters matching optimization analytical target cascading （ATC） powertrain
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Parallel Implementation of the Non-Overlapping Template Matching Test Using CUDA 认领 引用
2
作者 Kaikai Li Jianguo Zhang +2 位作者 Pu Li Anbang Wang Yuncai Wang 《China Communications》 SCIE CSCD 2020年第8期234-241,共8页
NIST(National Institute of Standards and Technology) statistical test recognized as the most authoritative is widely used in verifying the randomness of binary sequences. The Non-overlapping Template Matching Test as ... NIST(National Institute of Standards and Technology) statistical test recognized as the most authoritative is widely used in verifying the randomness of binary sequences. The Non-overlapping Template Matching Test as the 7 th test of the NIST Test Suit is remarkably time consuming and the slow performance is one of the major hurdles in the testing process. In this paper, we present an efficient bit-parallel matching algorithm and segmented scan-based strategy for execution on Graphics Processing Unit(GPU) using NVIDIA Compute Unified Device Architecture(CUDA). Experimental results show the significant performance improvement of the parallelized Non-overlapping Template Matching Test, the running speed is 483 times faster than the original NIST implementation without attenuating the test result accuracy. 展开更多
关键词 random numbers CUDA non-overlapping template matching test parallel implementation NIST test
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A new parallel algorithm for image matching based on entropy 认领 引用 被引量：1
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作者 董开坤 胡铭曾 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2001年第4期399-402,共4页
Presents a new parallel image matching algorithm based on the concept of entropy feature vector and suitable to SIMD computer, which, in comparison with other algorithms, has the following advantages:(1)The spatial in... Presents a new parallel image matching algorithm based on the concept of entropy feature vector and suitable to SIMD computer, which, in comparison with other algorithms, has the following advantages:(1)The spatial information of an image is appropriately introduced into the definition of image entropy. (2) A large number of multiplication operations are eliminated, thus the algorithm is sped up. (3) The shortcoming of having to do global calculation in the first instance is overcome, and concludes the algorithm has very good locality and is suitable for parallel processing. 展开更多
关键词 image matching entropy feature vector parallel algorithm SIMD
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Parallel Quick Search Algorithm for the Exact String Matching Problem Using OpenMP 认领 引用 被引量：1
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作者 Sinan Sameer Mahmood Al-Dabbagh Nawaf Hazim Barnouti +1 位作者 Mustafa Abdul Sahib Naser Zaid G. Ali 《Journal of Computer and Communications》 2016年第13期1-11,共11页
String matching is seen as one of the essential problems in computer science. A variety of computer applications provide the string matching service for their end users. The remarkable boost in the number of data that... String matching is seen as one of the essential problems in computer science. A variety of computer applications provide the string matching service for their end users. The remarkable boost in the number of data that is created and kept by modern computational devices influences researchers to obtain even more powerful methods for coping with this problem. In this research, the Quick Search string matching algorithm are adopted to be implemented under the multi-core environment using OpenMP directive which can be employed to reduce the overall execution time of the program. English text, Proteins and DNA data types are utilized to examine the effect of parallelization and implementation of Quick Search string matching algorithm on multi-core based environment. Experimental outcomes reveal that the overall performance of the mentioned string matching algorithm has been improved, and the improvement in the execution time which has been obtained is considerable enough to recommend the multi-core environment as the suitable platform for parallelizing the Quick Search string matching algorithm. 展开更多
关键词 String Matching Pattern Matching String Searching Algorithms Quick Search Algorithm Exact String Matching Algorithm ? Parallelization OpenMP
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Inertia Match of a 3-RRR Reconfigurable Planar Parallel Manipulator 认领 引用 被引量：8
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作者 SHAO Zhufeng TANG Xiaoqiang +1 位作者 CHEN Xu WANG Liping 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS 2009年第6期791-799,共9页
Inertia match of the parallel manipulator means the ratio of the inertial load of the parallel manipulator converted to each actuator shaft and the moment of inertia of the actuator is kept within a reasonable range.C... Inertia match of the parallel manipulator means the ratio of the inertial load of the parallel manipulator converted to each actuator shaft and the moment of inertia of the actuator is kept within a reasonable range.Currently there are many studies on parallel manipulators,but few mention inertia parameters and inertia match of parallel manipulators.This paper focuses on the inertia characteristics of the 3-RRR reconfigurable planar parallel manipulator.On the basis of the inverse dynamic formulations deduced with the principle of virtual work,the inertia matrix of the 3-RRR planar parallel manipulator in the actuator space is obtained in algebraic form.Then,by unifying the dimension and averaging diagonal elements of the inertia matrix,the equivalent inertia of the parallel manipulator,which is the inertial load of the parallel manipulator converted to each actuator shaft,is determined.By transforming the inertia problem of the 3-RRR parallel manipulator into that of the serial multi-bar manipulator,the practicality of the equivalent inertia deduced by inverse dynamics is demonstrated.According to the physical meaning of the inertia equation,the manipulator is divided in to three parts.Further analysis is carried out on the contribution of each part to the equivalent inertia and their distributions in the required workspace,revealing that the passive links cannot ignored in calculating the equivalent inertia of the parallel manipulator.Finally,the inertia match for the 3-RRR reconfigurable parallel manipulator under three configurations is accomplished,and reducers are selected.The equivalent inertia calculation and the inertial match results illustrate that the inertia math is a necessary step to the design of the parallel manipulator,and inertia parameters dramatically affect dynamic performances of parallel manipulators.Besides,the equivalent inertia and inertial match principles,proposed in the paper,can be widely applied in the dynamic analysis and servomotors selecting for the parallel manipulator. 展开更多
关键词 inertia match equivalent inertia inverse dynamics parallel manipulator
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High-Speed Parallel Matched Filter Designing and FPGA Implementation 认领 引用
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作者 ZHANG Qinglin CHEN Shuzhen +1 位作者 LUO Yijun WANG Shan 《Wuhan University Journal of Natural Sciences》 CAS 2010年第4期335-339,共5页
Matched filter is one of the key technologies to achieve high-speed data transmission.In this paper,a parallel finite-impulse response(FIR)filter structure based on polyphase filter-ing is used to achieve high-speed m... Matched filter is one of the key technologies to achieve high-speed data transmission.In this paper,a parallel finite-impulse response(FIR)filter structure based on polyphase filter-ing is used to achieve high-speed matched filter in quadrature phase-shift keying(QPSK)demodulation up to 800 Mb·s-1.First,a window function is employed of to obtain impulse response of matched filter.Second,the high-speed parallel FIR structure is presented based on polyphase filtering.Then,the filter with EP2S180F1020 on the Quartus II 7.2 platform is achieved.The final results show that the design is correct and can implement high-speed matched filtering,wherein the equivalent frequency of which is up to 2037 MHz.In addition,this scheme is easy to real-ize,which brings great value to the application of this filter in high-speed matched filters design in demodulation systems. 展开更多
关键词 parallel matched filter finite-impulse response(FIR) window function polyphase filtering field programmable gate array
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Theoretical study of magnetic lens with parallel beam matched 认领 引用
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作者 Guo-Jun Yang Zhuo Zhang +3 位作者 Tao Wei Yi-Ding Li Xiao-Ding Zhang Jin-Shui Shi 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2017年第2期12-17,共6页
The magnetic lens(Zumbro lens) is a critical part in proton radiography. Traditionally the matched beam for Zumbro lens in proton radiography is a virtual point source beam, which is not suitable for some cases, such ... The magnetic lens(Zumbro lens) is a critical part in proton radiography. Traditionally the matched beam for Zumbro lens in proton radiography is a virtual point source beam, which is not suitable for some cases, such as cylindrical samples. In these cases, a parallel beam is more appropriate. In this paper, a method, which uses quadrupole beamline, is proposed for designing a magnetic lens with parallel beam matched. Theoretical analysis is given. The results show that the matched beam for this lens is indeed parallel beam, while the major merits of Zumbro lens are inherited. Following this method, a theoretical design based on the 11-Me V cyclotron is presented. 展开更多
关键词 Proton radiography Magnetic lens Chromatic blur Parallel beam Match
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轻薄宽带声学超构材料吸声性能与拼接 认领 引用
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作者 周国建 冯青松 +2 位作者 刘艳 赵祎 李涛 《同济大学学报（自然科学版）》 EI CAS CSCD 北大核心 2026年第4期562-570,共9页
针对传统声学材料难以有效吸收中低频噪声以及声学超构材料轻薄化宽带应用问题,基于声学超构单元耦合共振吸声原理和并联阻抗匹配设计理论,提出一种嵌入管式声学超构模块和航空棉模块并联交替组合的声学超构组件构型与大幅面拼接应用设... 针对传统声学材料难以有效吸收中低频噪声以及声学超构材料轻薄化宽带应用问题,基于声学超构单元耦合共振吸声原理和并联阻抗匹配设计理论,提出一种嵌入管式声学超构模块和航空棉模块并联交替组合的声学超构组件构型与大幅面拼接应用设计方案,实现了优良的低宽频吸声性能。首先利用差分进化算法优化设计出厚度仅为13.98mm的中低频声学超构吸声模块。然后基于声电类比等效电路,反演构建了声学超构模块与航空棉并联组合的声阻抗与吸声系数理论模型,解析和实验验证了其良好的低宽频吸声性能。最后以交替拼接方式拓展制备了大幅面声学超构材料样件,实验结果表明,其在500~8000Hz宽频带内平均吸声系数高达0.92,等效面密度仅为2.87kg·m-2。针对高端装备制造、新能源汽车等战略新兴产业中有限夹层空间内的低宽频降噪应用难题,该声学超构材料具备轻薄化、宽带高吸声与拼接装配便捷等应用优势。 展开更多
关键词 轻薄 并联交替拼接 阻抗匹配 声学超构材料 宽带吸声
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利用电子围栏技术的红沙泉煤矿封闭区域车辆定位方法 认领 引用 被引量：1
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作者 汤明国 《地理空间信息》 2026年第1期97-101,共5页
红沙泉煤矿封闭区域内车辆往来频繁,车辆的相对位置和姿态标定受到影响,导致车辆定位的连续性和准确性受限。提出了基于电子围栏技术的红沙泉煤矿封闭区域车辆定位方法。通过电子围栏技术设计车辆定位架构,基于平行线算法设定电子围栏边... 红沙泉煤矿封闭区域内车辆往来频繁,车辆的相对位置和姿态标定受到影响,导致车辆定位的连续性和准确性受限。提出了基于电子围栏技术的红沙泉煤矿封闭区域车辆定位方法。通过电子围栏技术设计车辆定位架构,基于平行线算法设定电子围栏边界,采用SINS/DR辅助的卫星信号捕获方法获取电子围栏边界内的车辆位置信息;引入HMM地图匹配算法精确比对获取的车辆位置与高精度地图中的道路位置,修正定位误差,实现红沙泉煤矿封闭区域车辆定位。结果表明,在GPS信号盲区该方法的定位结果具有较好的连续性和准确性,展现出高精确度的车辆定位水平。 展开更多
关键词 电子围栏 红沙泉煤矿 封闭区域 车辆定位 平行线算法 地图匹配算法
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CUSMART:effective parallelization of stringmatching algorithms using GPGPU accelerators 认领 引用
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作者 Adnan OZSOY Mengu NAZLI +1 位作者 Onur CANKUR Cagri SAHIN 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2025年第6期877-895,共19页
This study presents a parallel version of the string matching algorithms research tool(SMART)library,implemented on NVIDIA’s compute unified device architecture(CUDA)platform,and uses general-purpose computing on gra... This study presents a parallel version of the string matching algorithms research tool(SMART)library,implemented on NVIDIA’s compute unified device architecture(CUDA)platform,and uses general-purpose computing on graphics processing unit(GPGPU)programming concepts to enhance performance and gain insight into the parallel versions of these algorithms.We have developed the CUDA-enhanced SMART(CUSMART)library,which incorporates parallelized iterations of 64 string matching algorithms,leveraging the CUDA application programming interface.The performance of these algorithms has been assessed across various scenarios to ensure a comprehensive and impartial comparison,allowing for the identification of their strengths and weaknesses in specific application contexts.We have explored and established optimization techniques to gauge their influence on the performance of these algorithms.The results of this study highlight the potential of GPGPU computing in string matching applications through the scalability of algorithms,suggesting significant performance improvements.Furthermore,we have identified the best and worst performing algorithms in various scenarios. 展开更多
关键词 String matching Parallel programming Graphics processing unit(GPU)programming General-purpose computing on GPU(GPGPU) NVIDIA Compute unified device architecture(CUDA) String matching algorithms research tool(SMART)
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Joint wireless and cloud resource allocation based on parallel auction for mobile edge computing 认领 引用 被引量：2
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作者 Lan Zhuorui Xia Weiwei +2 位作者 Wu Siyun Yan Feng Shen Lianfeng 《Journal of Southeast University(English Edition)》 EI CAS 2019年第2期153-159,共7页
A joint resource allocation algorithm based on parallel auction(JRAPA)is proposed for mobile edge computing(MEC).In JRAPA,the joint allocation of wireless and cloud resources is modeled as an auction process,aiming at... A joint resource allocation algorithm based on parallel auction(JRAPA)is proposed for mobile edge computing(MEC).In JRAPA,the joint allocation of wireless and cloud resources is modeled as an auction process,aiming at maximizing the utilities of service providers(SPs)and satisfying the delay requirements of mobile terminals(MTs).The auction process consists of the bidding submission,winner determination and pricing stages.At the bidding submission stage,the MTs take available resources from SPs and distance factors into account to decide the bidding priority,thereby reducing the processing delay and improving the successful trades rate.A resource constrained utility ranking(RCUR)algorithm is put forward at the winner determination stage to determine the winners and losers so as to maximize the utilities of SPs.At the pricing stage,the sealed second-price rule is adopted to ensure the independence between the price paid by the buyer and its own bid.The simulation results show that the proposed JRAPA algorithm outperforms other existing algorithms in terms of the convergence rate and the number of successful trades rate.Moreover,it can not only achieve a larger average utility of SPs but also significantly reduce the average delay of MTs. 展开更多
关键词 parallel auction mobile edge computing joint resource allocation fast matching
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基于综合区域匹配算法的快速遥感变化检测 认领 引用
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作者 范磊 李轶鲲 +3 位作者 胡玉玺 李小军 谢江陵 朱睿 《自然资源遥感》 CSCD 北大核心 2026年第4期1-10,共10页
在遥感影像变化检测研究中,影像中普遍存在的噪声是影响检测精度的关键干扰因素之一。现有基于空间模糊C均值聚类(spatial fuzzy C-means clustering,SFCM)和推土机距离(earth mover’s distance,EMD)的SFCM-EMD算法框架能有效提高变化... 在遥感影像变化检测研究中,影像中普遍存在的噪声是影响检测精度的关键干扰因素之一。现有基于空间模糊C均值聚类(spatial fuzzy C-means clustering,SFCM)和推土机距离(earth mover’s distance,EMD)的SFCM-EMD算法框架能有效提高变化检测对噪声的鲁棒性,但EMD算法计算复杂度较高,难以在保证变化检测对噪声具有鲁棒性的同时提高检测效率。本研究将SFCM与综合区域匹配(integrated region matching,IRM)算法相结合,实现了具有抗噪能力的快速变化检测算法框架SFCM-IRM。该算法在噪声条件下保证了检测精度,同时大幅降低了算法运行时间。实验结果表明,本研究提出的SFCM-IRM在检测精度方面与SFCM-EMD相近,平均Kappa系数仅相差0.0044;同时SFCM-IRM算法平均运行时间仅有0.98 s,而SFCM-EMD算法平均运行时间为10.29 s,大幅提升了计算效率,验证了SFCM-IRM作为快速抗噪变化检测的理论价值和应用潜力。 展开更多
关键词 图像处理 变化检测 综合区域匹配 空间模糊C均值 并行化
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多视密集匹配并行传播GPU-PatchMatch算法 认领 引用 被引量：7
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作者 邓非 颜青松 肖腾 《测绘学报》 EI CSCD 北大核心 2020年第2期181-190,共10页
针对多视密集匹配的效率较低的问题,提出了GPU-PatchMatch多视密集匹配算法。该算法使用GPU提高PatchMatch的计算效率;同时充分利用稀疏场景信息,对深度信息进行规则初始化;为提高传播效率,使用了金字塔红黑板并行传播深度信息。最后在... 针对多视密集匹配的效率较低的问题,提出了GPU-PatchMatch多视密集匹配算法。该算法使用GPU提高PatchMatch的计算效率;同时充分利用稀疏场景信息,对深度信息进行规则初始化;为提高传播效率,使用了金字塔红黑板并行传播深度信息。最后在DTU、Strecha和Vaihigen数据集上进行了试验,并与常用的多视密集匹配算法进行对比。试验结果表明,本文算法在重建效率上有较大提高,与CPU算法(PMVS、MVE、OpenMVS)相比有7倍以上提升,与GPU算法相比也有2.5倍以上提升,表明本文算法的有效性。 展开更多
关键词 三维重建 多视密集匹 块匹配 并行计算
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中波三频共塔并馈天线馈电平台优化与匹配网络设计 认领 引用
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作者 肖国祥 《广播与电视技术》 2026年第6期82-85,共4页
接地并馈式中波天线在三频共塔使用时,中部馈电平台的高度应结合三个频率的波长进行合理设计。本文根据本台三个频率的实际情况,对接地并馈式中波天线的中部馈电平台高度进行了优化调整,使各个播出频率均有理想的天线阻抗,以便于匹配网... 接地并馈式中波天线在三频共塔使用时,中部馈电平台的高度应结合三个频率的波长进行合理设计。本文根据本台三个频率的实际情况,对接地并馈式中波天线的中部馈电平台高度进行了优化调整,使各个播出频率均有理想的天线阻抗,以便于匹配网络的设计和调试,使天线辐射有更高的工作效率,使发射系统有更稳定的工作性能,为安全播出提供了有力的技术保障。 展开更多
关键词 中波并馈天线 馈电平台 匹配网络
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面向电力监控系统SCADA服务器的二进制指令语义检测方法 认领 引用
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作者 李镇淮 周司维 +2 位作者 方宏佳 陈轩 张淼 《国外电子测量技术》 2026年第5期140-145,共6页
传统检测方法存在语义鸿沟较大、易被攻击者逃逸的问题。为此,提出一种面向电力监控系统(Supervisory Control and Data Acquisition,SCADA)服务器的二进制指令语义检测方法。利用可重构计算阵列构建指令级行为指纹提取单元,在硬件流水... 传统检测方法存在语义鸿沟较大、易被攻击者逃逸的问题。为此,提出一种面向电力监控系统(Supervisory Control and Data Acquisition,SCADA)服务器的二进制指令语义检测方法。利用可重构计算阵列构建指令级行为指纹提取单元,在硬件流水线上完成对高频恶意指令序列的并行匹配,实现对恶意指令语义特征的快速识别。同时引入ARM性能监控单元与片内总线嗅探相结合的架构,通过分析指令执行时微架构侧信道特征与指令语义之间的关联性,区分正常业务逻辑与恶意指令流,增强对混淆变种逃逸行为的语义判别能力。实验结果表明,该方法对未知二进制攻击的检测准确率最高达96.8%,混淆变种逃逸率不大于5%,且单指令匹配延迟不大于50 ns,为电力关键基础设施的终端主动防御提供了有效手段。 展开更多
关键词 SCADA服务器 二进制指令 并行匹配 可重构计算 语义检测
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基于FHE的高性能隐私保护人脸认证系统 认领 引用
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作者 赵野 赵文鹏 +3 位作者 王文超 彭惠康 柳笛 张海春 《网络空间安全科学学报》 CSCD 2026年第2期50-60,共11页
本文研究了基于全同态加密(fully homomorphic encryption,FHE)的隐私保护人脸认证系统,目标是在不泄露人脸特征的前提下,实现云端匹配并降低计算与通信开销。基于CKKS(Cheon-Kim-Kim-Song)近似同态计算方案,构建了“端侧加密、云端同... 本文研究了基于全同态加密(fully homomorphic encryption,FHE)的隐私保护人脸认证系统,目标是在不泄露人脸特征的前提下,实现云端匹配并降低计算与通信开销。基于CKKS(Cheon-Kim-Kim-Song)近似同态计算方案,构建了“端侧加密、云端同态计算、可信机构解密判决”的三层架构,实现了密文特征的生成、传输、存储与匹配。针对128维人脸特征匹配需求,设计了多槽打包与批量余弦相似度评估流程,在密文域并行完成内积、模长等关键计算,且仅返回加密匹配分数。针对同态运算的性能瓶颈,采用巴雷特模约简算法并进行汇编级优化,结合OpenMP多线程技术与指令级并行技术,提升系统计算吞吐量。Intel平台的实验结果表明,优化后的巴雷特模约简算法较普通实现加速约1.96倍。通过配置32个加速线程及特定加密参数(15个模数Q、1个模数P,模数QP的总比特数为881),在批量大小为128的配置下,特征密文匹配时延由68.1 ms降至11.4 ms。表明该系统在隐私保护约束下具备高并发实时认证的性能。 展开更多
关键词 全同态加密 人脸认证 特征匹配 隐私保护 并行计算
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220 kV宽适配性备品电力变压器关键技术研究 认领 引用
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作者 丁灿伟 《电工技术》 2026年第8期158-160,164,共3页
电力系统中要完成各级电能的输、变、配和供电的任务时,发电设备每发出1 kW电能就需要5~9 kVA容量的变压器。研究在额定电压、阻抗等并联运行关键指标方面具备宽适配性的备用变压器,灵活实现与同类变压器并联参数匹配,可以备品任一台同... 电力系统中要完成各级电能的输、变、配和供电的任务时,发电设备每发出1 kW电能就需要5~9 kVA容量的变压器。研究在额定电压、阻抗等并联运行关键指标方面具备宽适配性的备用变压器,灵活实现与同类变压器并联参数匹配,可以备品任一台同类型变压器,并适应其运行状态,同时满足电力安全可靠运行要求。 展开更多
关键词 电力系统 并联运行 宽适配性 备用变压器 参数匹配
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Analysis of Large Slotted-Waveguide Antenna Arrays Using the Parallel DDA-FE-BI-MLFMA 认领 引用
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作者 Xumin Sun Minglin Yang +1 位作者 Hongwei Gao Xinqing Sheng 《Journal of Beijing Institute of Technology》 EI CAS 2017年第1期84-89,共6页
An efficient analyzing approach is presented for large slotted-waveguide antenna arrays by using hybrid finite element-boundary integral-multilevel fast multipole algorithm（FE-BI-MLFMA）in this paper.A simple computa... An efficient analyzing approach is presented for large slotted-waveguide antenna arrays by using hybrid finite element-boundary integral-multilevel fast multipole algorithm（FE-BI-MLFMA）in this paper.A simple computation model for slotted-waveguide antenna is presented by using thin current probe excitation and perfectly matched layer（PML）absorber.Since each slotted-waveguide antenna can be considered as a single sub-domain,the domain decomposition algorithm（DDA）can be applied to FE-BI-MLFMA to greatly reduce the computation resources and achieve high efficiency.This DDA-FE-BI-MLMFA is parallelized to further strength its capability.The comparisons of the computed radiation patterns with measured data and results from the commercial software show that our method has good accuracy for slottedwaveguide array.Then the influence of mutual coupling between adjacent slotted-waveguides is studied.To demonstrate capability of the presented method,a carefully designed large X-band slotted-waveguide antenna array containing eighteen waveguides with Taylor amplitude and inverse phase excitation distribution are analyzed in the paper. 展开更多
关键词 large slotted-waveguide antenna array perfectly matched layer domain decompositionalgorithm parallel FE-BI-MLFMA
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基于双目视觉的断路器运动特性检测技术 认领 引用 被引量：3
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作者 王紫正 宋晓通 +1 位作者 刘欣博 卓定寰 《高电压技术》 EI CAS CSCD 北大核心 2025年第11期5526-5538,共13页
断路器的运动特性是反映断路器性能的指标。针对现有断路器运动特性检测技术存在作业步骤繁琐,测量精度受限等不足,提出基于双目视觉的断路器运动特性检测技术。利用2台高速工业相机采集断路器连杆在合、分闸过程的运动图像;通过该文所... 断路器的运动特性是反映断路器性能的指标。针对现有断路器运动特性检测技术存在作业步骤繁琐,测量精度受限等不足,提出基于双目视觉的断路器运动特性检测技术。利用2台高速工业相机采集断路器连杆在合、分闸过程的运动图像;通过该文所提平行路径搜索法,利用归一化互相关(normalized cross-correlation,NCC)算法逐帧匹配图像的关键区域并提取,生成只含有关键区域的图像;只对关键区域进行立体匹配,获取关键区域的视差图;将视差图转换为断路器连杆的三维运动轨迹;通过坐标变换将运动轨迹转换为断路器连杆的运动特性曲线和参数。实验结果表明,通过平行路径搜索法使得每帧图像总耗费时间减少55%;双目视觉在测量断路器连杆位移时的平均误差为2.2%;在测量连杆合、分闸过程中深度变化的平均偏差分别为2.24 mm和−2.65 mm,在X、Y方向的分闸位移分别为24.528 mm和1.365 mm,平均速度分别为0.947 m/s和0.045 m/s。综上所述,基于双目视觉的断路器运动特性检测技术实现了在非接触条件下,对断路器在3个维度运动特性的准确检测,简化检测步骤的同时提高了分析计算的效率。 展开更多
关键词 断路器 运动特性 双目视觉 平行路径搜索 图像匹配 三维运动轨迹
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如何使用.Net的Parallel功能进行并行迭代 认领 引用
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作者 李斌 《电脑编程技巧与维护》 2015年第9期115-115,共1页
随着多核甚至多个CPU在计算机上的使用,并行处理（Parallel）成为一个热点,并行处理牵涉到多线程及同步问题,编程将变得复杂的多,下面将通过本文简单介绍如何使用.net提供的Parallel功能进行并行迭代。
关键词 行迭代 Parallel Net 并行处理 多线程 string match 泛型 编程工具 类库
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