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森林火灾与中压配电线路故障的发生时序研究

重庆理工大学学报（自然科学） 2024年第4期38卷 237-242页

作者：李天友郭伯森黄超艺苏俊王连辉陈石川厦门理工学院电气工程与自动化学院福建厦门361024 厦门市高端电力装备及智能控制重点实验室福建厦门361024 国网福建省电力有限公司福州350003

电力线路穿过林区,线路故障的电火花可能引发森林火灾,同时森林火灾也有可能造成穿过林区的电力线路故障,两者的发生顺序(即发生时序)对火灾事故责任划分有着重要意义,但在工程实践中判断发生时序十分困难。为此,选择中压配电线路作为... 详细信息

电力线路穿过林区,线路故障的电火花可能引发森林火灾,同时森林火灾也有可能造成穿过林区的电力线路故障,两者的发生顺序(即发生时序)对火灾事故责任划分有着重要意义,但在工程实践中判断发生时序十分困难。为此,选择中压配电线路作为研究对象,建立树线故障模拟实验平台,研究线路触树发生单相接地故障和火灾下诱使线路发生故障这2种情况下的零序电压变化情况,并通过对零序电压进行Hilbert变换绘制包络线进行故障场景的初步筛分;再通过THD、近似熵、相关系数对波形进行相似度判断,将3种相似度特征量使用模糊C聚类进行分析,总结提出森林火灾与中压配电线路故障发生时序的判别方法。研究结果显示:该研究能够为森林火灾与电力线路故障的发生时序判别提供技术方法,具有相应的工程应用价值,对事故责任划分提供技术参考。

关键词：配电线路模拟实验平台导线痕迹森林火灾发生时序判别

Incremental Learning of Radio Modulation Classification Based on Sample Recall

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China Communications 2023年第7期20卷 258-272页

作者： Yan Zhao shichuan chen Tao chen Weiguo Shen Shilian Zheng Zhijin Zhao Xiaoniu Yang School of Communication Engineering Hangzhou Dianzi UniversityHangzhou 310018China Science and Technology on Communication Information Security Control Laboratory Jiaxing 314033China Institute of Cyberspace Security Zhejiang University of TechnologyHangzhou 310023China

Radio modulation classification has always been an important technology in the field of *** difficulty of incremental learning in radio modulation classification is that learning new tasks will lead to catastrophic forgetting of old *** this paper,we propose a sample memory and recall framework for incremental learning of radio modulation *** data with different signal-to-noise ratios,we use a partial memory strategy by selecting appropriate samples for *** compare the performance of our proposed method with three baselines through a large number of simulation *** show that our method achieves far higher classification accuracy than finetuning method and feature extraction ***,it performs closely to joint training method which uses all old data in terms of classification accuracy which validates the effectiveness of our method against catastrophic forgetting.

关键词： radio modulation classification incremen-tal learning deep learning convolutional neural net-work.

Spectrum Sensing Based on Deep Learning Classification for Cognitive Radios

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China Communications 2020年第2期17卷 138-148页

作者： Shilian Zheng shichuan chen Peihan Qi Huaji Zhou Xiaoniu Yang Science and Technology on Communication Information Security Control Laboratory Jiaxing 314033China State Key Laboratory of Integrated Service Networks Xidian UniversityXi’an 710071China Key Laboratory of Intelligent Perception and Image Understanding Ministry of Education of ChinaXidian UniversityXi’an 710071China

Spectrum sensing is a key technology for cognitive *** present spectrum sensing as a classification problem and propose a sensing method based on deep learning *** normalize the received signal power to overcome the effects of noise power *** train the model with as many types of signals as possible as well as noise data to enable the trained network model to adapt to untrained new *** also use transfer learning strategies to improve the performance for real-world *** experiments are conducted to evaluate the performance of this *** simulation results show that the proposed method performs better than two traditional spectrum sensing methods,i.e.,maximum-minimum eigenvalue ratio-based method and frequency domain entropy-based *** addition,the experimental results of the new untrained signal types show that our method can adapt to the detection of these new ***,the real-world signal detection experiment results show that the detection performance can be further improved by transfer ***,experiments under colored noise show that our proposed method has superior detection performance under colored noise,while the traditional methods have a significant performance degradation,which further validate the superiority of our method.

关键词： spectrum sensing deep learning convolutional neural network cognitive radio spectrum management

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一类双边碰撞振动系统的随机响应研究

应用力学学报 2024年第1期41卷 115-120页

作者：钱佳敏陈林聪刘世川华侨大学土木工程学院厦门361021

碰撞过程凭借瞬时冲击模型得以简化,但采用经典的Newton恢复系数模型为计算带来了误差。本研究引入修正的恢复系数模型取代经典的Newton恢复系数模型,预测了一类宽带噪声激励下双边碰撞振动系统的随机动力学响应。位移的碰撞条件借助自... 详细信息

碰撞过程凭借瞬时冲击模型得以简化,但采用经典的Newton恢复系数模型为计算带来了误差。本研究引入修正的恢复系数模型取代经典的Newton恢复系数模型,预测了一类宽带噪声激励下双边碰撞振动系统的随机动力学响应。位移的碰撞条件借助自由振动系统被转化为能量的碰撞条件。根据系统的能量水平,系统的运动可被分为双边碰撞和无碰撞振动两类。进一步地,两类运动的平均漂移系数和扩散系数可借助能量包线随机平均法求解获得。在此基础上,建立并求解对应的Fokker-Plank-Kolmogorov (FPK)方程,进而得到系统的稳态响应。最后,将所提方法应用于Duffing振子,讨论了屈服速度、挡板间距和噪声激励对响应的影响,并用蒙特卡罗模拟验证了所述方法的有效性。

关键词：瞬时冲击模型恢复系数双边碰撞振动宽带噪声随机平均法

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配网检修中的自动化与智能化的融合发展研究

现代工业经济和信息化 2024年第2期14卷 284-286页

作者：王世川陈本书国网四川省电力公司万源市供电分公司四川达州636365

随着社会经济的发展和人民生活水平的提高,配网系统的稳定性和可靠性越来越受到关注。主要探讨了配网检修中的自动化与智能化的融合发展,分析了研究背景以及配网检修中自动化技术和智能化技术发展的现状,并提出了相应的解决方案和策略。

关键词：配网检修自动化智能化融合发展

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小型全电/混动飞机技术路线与动力系统综述

中国电机工程学报 2024年第12期44卷 4966-4985,I0031页

作者：陈起旭王群京钱喆李国丽曹文平丁石川孙泽辉高节能电机及控制技术国家地方联合实验室(安徽大学) 安徽省合肥市230601

该文对小型全电/混动载人飞机的技术发展路线、航空推进电机、动力系统架构进行分析、总结与展望。首先,从载人飞机的气动布局、结构拓扑、动力源和起降形式等方面分析,分出6条技术路线,总结各自的乘客数、最大起飞重量、巡航速度、功... 详细信息

该文对小型全电/混动载人飞机的技术发展路线、航空推进电机、动力系统架构进行分析、总结与展望。首先,从载人飞机的气动布局、结构拓扑、动力源和起降形式等方面分析,分出6条技术路线,总结各自的乘客数、最大起飞重量、巡航速度、功率和航程等技术指标。其次,总结已装机或拟装机航空推进电机的技术参数和应用机型。对先进航空推进电机的发展现状,按功率等级分类探讨了三相永磁电机、多相永磁电机、兆瓦级涡轮机驱动的兆瓦级电机/发电机、高温超导电机。最后,对6种动力系统架构的技术路线特点、关键技术进行梳理,分析载人全电/混动飞机未来的发展方向。国内载人电动/混动飞机领域刚起步,该文的研究工作对飞机的总体气动布局设计、功率需求、器件选型、动力系统设计具有重要的参考价值。

关键词：航空电气化电动/混动飞机电动垂直起降飞行汽车电机动力系统

合福铁路闽清站1#大桥4×32m道岔连续梁施工技术

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城市建筑 2014年第4期11卷 89-90页

作者：陈世川中铁二局第六工程有限公司 610031

本文结合合福铁路闽清站1#大桥4×32 m道岔连续梁施工,重点对铁路车站道岔连续梁现浇支架体系设计与施工、道岔连续梁施工工艺等方面进行了阐述,希望对类似工程施工具有借鉴和参考价值。

关键词： 4×32 m道岔连续梁现浇支架施工

3D morphology and formation mechanism of fractures developed by true triaxial stress

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International Journal of Mining Science and Technology 2022年第6期32卷 1273-1284页

作者： Bing chen Baotang Shen shichuan Zhang Yangyang Li Haiyang Jiang State Key Laboratory of Mining Disaster Prevention and Control Co-founded Shandong University of Science and TechnologyQingdao 266590China CSIRO Mineral Resources Queensland 4069Australia No.1 Institute of Geology and Mineral Resource Exploration of Shandong Province Jinan 250010China College of New Energy and Environment Jilin UniversityChangchun 130012China

As main part of underground rock mass,the three-dimensional(3D)morphology of natural fractures plays an important role in rock mass *** on previous studies on 3D morphology,this study probes into the law and mechanism regarding the influence of the confining pressure constraints on 3D morphological features of natural ***,fracture surfaces were obtained by true triaxial compression test and 3D laser *** 3D morphological parameters of fractures were calculated by using Grasselli’s *** results show that the failure mode of granites developed by true triaxial stress can be categorized into tension failure and shear *** on the spatial position of fractures,they can be divided into tension fracture surface,S-1 shear fracture surface,and S-2 shear fracture ***-failure of the tension fracture surface is dominated by mainly intergranular fracture;the maximum height of asperities on the fracture surface and the 3D roughness of fracture surfaces are influenced by σ_(3) only and they are greater than those of shear fracture surfaces,a lower overall uniformity than tension fracture surface.S-1 shear fracture surface and S-2 shear fracture surface are dominated by intragranular and intergranular coupling *** maximum height of asperities on the fracture surface and 3D roughness of fracture surface are affected by σ_(1),σ_(2),and σ_(3).With the increase of σ_(2) or σ_(3),the cutting off of asperities on the fracture surface becomes more common,the maximum height of asperities and 3D roughness of fracture surface further decrease,and the overall uniformity gets further *** experimental results are favorable for selecting technical parameters of enhanced geothermal development and the safety of underground mine engineering.

关键词： True triaxial stress Failure mode Fracture angle 3D morphology Micro-fracture

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现代学徒制下师资融合开展教学活动的探索

科教文汇 2020年第6期 99-100页

作者：陈进陈士川江阴职业技术学院计算机科学系江苏江阴214405

针对现代学徒制的要求,本文剖析了高职教师和企业师傅在教学中存在的不足,提出了教师和师傅深度融合开展教学活动,提高职业教育质量的举措。

关键词：现代学徒制职教融合教学质量