首页 > 最新文献

International Journal of Heavy Vehicle Systems最新文献

英文 中文
Method for determining the effect of road surface condition on the fuel consumption for heavy vehicles from vehicle measurements 从车辆测量中确定路面状况对重型车辆燃料消耗影响的方法
IF 0.6 4区 工程技术 Q3 Engineering Pub Date : 2023-01-01 DOI: 10.1504/ijhvs.2023.10058628
Perttu Niskanen, Ville Pirnes, Jonne Untinen, Juho Könnö
{"title":"Method for determining the effect of road surface condition on the fuel consumption for heavy vehicles from vehicle measurements","authors":"Perttu Niskanen, Ville Pirnes, Jonne Untinen, Juho Könnö","doi":"10.1504/ijhvs.2023.10058628","DOIUrl":"https://doi.org/10.1504/ijhvs.2023.10058628","url":null,"abstract":"","PeriodicalId":54958,"journal":{"name":"International Journal of Heavy Vehicle Systems","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77494741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Detailed review on multiple sources off grid charging station of electric vehicles centred on converters 以变流器为中心的电动汽车多源离网充电站的详细研究
IF 0.6 4区 工程技术 Q3 Engineering Pub Date : 2023-01-01 DOI: 10.1504/ijhvs.2023.10058488
Pankaj Badgaiyan, M. Pandey, Sunil Kumar Gupta
{"title":"Detailed review on multiple sources off grid charging station of electric vehicles centred on converters","authors":"Pankaj Badgaiyan, M. Pandey, Sunil Kumar Gupta","doi":"10.1504/ijhvs.2023.10058488","DOIUrl":"https://doi.org/10.1504/ijhvs.2023.10058488","url":null,"abstract":"","PeriodicalId":54958,"journal":{"name":"International Journal of Heavy Vehicle Systems","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90754716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on variable universe fuzzy anti-rollover control of counterbalanced forklift Based on a general rollover index 基于一般侧翻指标的平衡式叉车变域模糊防侧翻控制研究
4区 工程技术 Q3 Engineering Pub Date : 2023-01-01 DOI: 10.1504/ijhvs.2023.10060010
Guang Xia, Xianyang Liu, Xiwen Tang, Shilong Wu, Linfeng Zhao
{"title":"Research on variable universe fuzzy anti-rollover control of counterbalanced forklift Based on a general rollover index","authors":"Guang Xia, Xianyang Liu, Xiwen Tang, Shilong Wu, Linfeng Zhao","doi":"10.1504/ijhvs.2023.10060010","DOIUrl":"https://doi.org/10.1504/ijhvs.2023.10060010","url":null,"abstract":"","PeriodicalId":54958,"journal":{"name":"International Journal of Heavy Vehicle Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135158028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Operational charging methods for electric buses: a case study for BRT Istanbul 电动公交车的运行充电方法:伊斯坦布尔快速公交系统案例研究
4区 工程技术 Q3 Engineering Pub Date : 2023-01-01 DOI: 10.1504/ijhvs.2023.133000
Habib Kaymaz
{"title":"Operational charging methods for electric buses: a case study for BRT Istanbul","authors":"Habib Kaymaz","doi":"10.1504/ijhvs.2023.133000","DOIUrl":"https://doi.org/10.1504/ijhvs.2023.133000","url":null,"abstract":"","PeriodicalId":54958,"journal":{"name":"International Journal of Heavy Vehicle Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136299056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dual LCL resonance compensation for the design of electric vehicle wireless energy transmission system topology 基于双LCL谐振补偿的电动汽车无线能量传输系统拓扑设计
4区 工程技术 Q3 Engineering Pub Date : 2023-01-01 DOI: 10.1504/ijhvs.2023.10059060
Lei Dong, Jinge Ma
{"title":"Dual LCL resonance compensation for the design of electric vehicle wireless energy transmission system topology","authors":"Lei Dong, Jinge Ma","doi":"10.1504/ijhvs.2023.10059060","DOIUrl":"https://doi.org/10.1504/ijhvs.2023.10059060","url":null,"abstract":"","PeriodicalId":54958,"journal":{"name":"International Journal of Heavy Vehicle Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135400348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on integrated control of tripping anti-rollover for heavy dump trucks 重型自卸车脱扣防侧翻综合控制研究
4区 工程技术 Q3 Engineering Pub Date : 2023-01-01 DOI: 10.1504/ijhvs.2023.10059779
Qing he Guo, Zi wen Liao, Dong Guo, Zhi gang Jiang, Qing shan Gong, Ai hong Gong, Zhong cheng Fu, Ming mao Hu
{"title":"Study on integrated control of tripping anti-rollover for heavy dump trucks","authors":"Qing he Guo, Zi wen Liao, Dong Guo, Zhi gang Jiang, Qing shan Gong, Ai hong Gong, Zhong cheng Fu, Ming mao Hu","doi":"10.1504/ijhvs.2023.10059779","DOIUrl":"https://doi.org/10.1504/ijhvs.2023.10059779","url":null,"abstract":"","PeriodicalId":54958,"journal":{"name":"International Journal of Heavy Vehicle Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136304335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impact of super single truck tyres on tyre-terrain interaction characteristics 超级单轮胎对轮胎-地形相互作用特性的影响
4区 工程技术 Q3 Engineering Pub Date : 2023-01-01 DOI: 10.1504/ijhvs.2023.10059773
Alfonse Ly, Zeinab El Sayegh
{"title":"Impact of super single truck tyres on tyre-terrain interaction characteristics","authors":"Alfonse Ly, Zeinab El Sayegh","doi":"10.1504/ijhvs.2023.10059773","DOIUrl":"https://doi.org/10.1504/ijhvs.2023.10059773","url":null,"abstract":"","PeriodicalId":54958,"journal":{"name":"International Journal of Heavy Vehicle Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136306006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of train speed, track irregularities, and wheel flat on wheel-rail dynamic forces 列车速度、轨道不规则度和车轮平整度对轮轨动力的影响
4区 工程技术 Q3 Engineering Pub Date : 2023-01-01 DOI: 10.1504/ijhvs.2023.134708
Sajjad Sattari, Mohammad Saadat, Sayed Hasan Mirtalaie, Mehdi Salehi, Ali Soleimani
Today, the wheel-rail dynamic forces (WRDFs) is one of the criteria for reliable evaluation of running stability, track loading, and vibration behaviour of railway systems. Over-limit dynamic forces, with the creation and growth of wheel and rail defects, are the cause of the derailment, accidents, and damage, and must be constantly monitored. In the present paper, after modelling and validating a passenger rail system, the effects of changes in train speed, track irregularities, and wheel flats on the WRDFs, derailment coefficient, and wheel-rail dynamic impact factor are evaluated. One of the results showed that by changing the train speed in different track irregularities, the WRDFs has changed significantly and the maximum force has increased with increasing speed. For example, in class 5 and class 6 of irregularity, by changing the train speed from 20 km/h to 100 km/h, the WRDFs is increased about 32% and 27%, respectively.
如今,轮轨动力(WRDFs)是铁路系统运行稳定性、轨道载荷和振动特性可靠评估的标准之一。随着轮轨缺陷的产生和发展,超限动力是造成脱轨、事故和损坏的原因,必须不断监测。在本文中,通过对客运轨道系统的建模和验证,评估了列车速度、轨道不规则度和车轮平面变化对wrdf、脱轨系数和轮轨动态冲击系数的影响。结果表明:在不同的轨道不平度条件下,随着列车速度的变化,列车wrdf变化显著,最大力随速度的增加而增大。例如,在不规则的第5类和第6类中,将列车速度从20 km/h改为100 km/h, wrdf分别增加约32%和27%。
{"title":"Effects of train speed, track irregularities, and wheel flat on wheel-rail dynamic forces","authors":"Sajjad Sattari, Mohammad Saadat, Sayed Hasan Mirtalaie, Mehdi Salehi, Ali Soleimani","doi":"10.1504/ijhvs.2023.134708","DOIUrl":"https://doi.org/10.1504/ijhvs.2023.134708","url":null,"abstract":"Today, the wheel-rail dynamic forces (WRDFs) is one of the criteria for reliable evaluation of running stability, track loading, and vibration behaviour of railway systems. Over-limit dynamic forces, with the creation and growth of wheel and rail defects, are the cause of the derailment, accidents, and damage, and must be constantly monitored. In the present paper, after modelling and validating a passenger rail system, the effects of changes in train speed, track irregularities, and wheel flats on the WRDFs, derailment coefficient, and wheel-rail dynamic impact factor are evaluated. One of the results showed that by changing the train speed in different track irregularities, the WRDFs has changed significantly and the maximum force has increased with increasing speed. For example, in class 5 and class 6 of irregularity, by changing the train speed from 20 km/h to 100 km/h, the WRDFs is increased about 32% and 27%, respectively.","PeriodicalId":54958,"journal":{"name":"International Journal of Heavy Vehicle Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135504739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of unmanned ground vehicle (UGV) path tracking controller based on reinforcement learning 基于强化学习的无人地面车辆路径跟踪控制器设计
4区 工程技术 Q3 Engineering Pub Date : 2023-01-01 DOI: 10.1504/ijhvs.2023.134320
Islam A. Hassan, Tamer Attia, H. Ragheb, A.M. Sharaf
This paper presents a unmanned ground vehicles (UGV) path tracking controller based on deep reinforcement learning (DRL), where a double deep Q-network (DDQN) algorithm is employed to train a deep neural network (DNN) for controlling the UGV to follow the desired path. The advantage of DDQN over deep Q-network (DQN) is that the DDQN uses two NNs, where one is working as a controller to generate actions for controlling the UGV, while the other is the target network to estimate the future rewards. The path tracking UGV kinematic is presented to determine the deviated distance and orientation between the UGV's pose and the desired path. White noise was added to the UGV wheels' speed for evaluating the robustness of the proposed controller. The simulation results illustrate that the trained controller enables the UGV to follow the desired trajectory in the presence of noisy actuation with high accuracy.
提出了一种基于深度强化学习(DRL)的无人地面车辆(UGV)路径跟踪控制器,该控制器采用双深度Q-network (DDQN)算法训练深度神经网络(DNN)控制UGV沿期望路径运动。DDQN相对于深度q网络(deep Q-network, DQN)的优势在于,DDQN使用两个神经网络,其中一个作为控制器来生成用于控制UGV的动作,而另一个作为目标网络来估计未来的奖励。为了确定UGV姿态与期望路径的偏离距离和偏离方向,提出了UGV运动轨迹跟踪方法。在UGV车轮转速中加入白噪声,以评价所提控制器的鲁棒性。仿真结果表明,所设计的控制器能使机器人在有噪声驱动的情况下保持较高的运动轨迹精度。
{"title":"Design of unmanned ground vehicle (UGV) path tracking controller based on reinforcement learning","authors":"Islam A. Hassan, Tamer Attia, H. Ragheb, A.M. Sharaf","doi":"10.1504/ijhvs.2023.134320","DOIUrl":"https://doi.org/10.1504/ijhvs.2023.134320","url":null,"abstract":"This paper presents a unmanned ground vehicles (UGV) path tracking controller based on deep reinforcement learning (DRL), where a double deep Q-network (DDQN) algorithm is employed to train a deep neural network (DNN) for controlling the UGV to follow the desired path. The advantage of DDQN over deep Q-network (DQN) is that the DDQN uses two NNs, where one is working as a controller to generate actions for controlling the UGV, while the other is the target network to estimate the future rewards. The path tracking UGV kinematic is presented to determine the deviated distance and orientation between the UGV's pose and the desired path. White noise was added to the UGV wheels' speed for evaluating the robustness of the proposed controller. The simulation results illustrate that the trained controller enables the UGV to follow the desired trajectory in the presence of noisy actuation with high accuracy.","PeriodicalId":54958,"journal":{"name":"International Journal of Heavy Vehicle Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135051503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modelling and verification of a 12-DOF tractor-semitrailer longitudinal model for load transfer analysis 12自由度牵引车-半挂车纵向模型的建模与验证
4区 工程技术 Q3 Engineering Pub Date : 2023-01-01 DOI: 10.1504/ijhvs.2023.134312
M.Z. Abdul Manaf, K. Hudha, P.M. Samin, S.A.A. Bakar
The analysis of the longitudinal load transfer in a tractor-semitrailer provides vital information on the magnitude of the loads transferred between the tractor unit and the semitrailer unit. This study aims to develop a tractor-semitrailer longitudinal model for load transfer analysis based on a two-axle tractor and a single-axle semitrailer connected through a fifth-wheel hitch system. The model is simulated in the MATLAB Simulink software and verified using qualitative and quantitative comparison methods between the simulation and TruckSim data through the sudden acceleration and harsh braking tests. The dynamic behaviour of the developed tractor-semitrailer model agrees well with the TruckSim dynamic behaviour with an acceptable RMS error of less than 5%. The analysis of the longitudinal load transfer found that the load transfer during the harsh braking test had higher magnitudes and longer duration of existence than the sudden acceleration test.
对牵引车-半挂车纵向载荷传递的分析提供了牵引车单元和半挂车单元之间载荷传递幅度的重要信息。本研究旨在建立一个牵引车-半挂车纵向模型,用于负载传递分析,该模型基于一辆双轴牵引车和一辆通过第五轮悬挂系统连接的单轴半挂车。在MATLAB Simulink软件中对模型进行了仿真,并通过突然加速和急刹车试验,采用定性和定量对比的方法,将仿真结果与TruckSim数据进行了验证。所建立的半挂车模型的动态特性与TruckSim的动态特性吻合良好,均方根误差小于5%。纵向载荷传递分析发现,与突然加速试验相比,急刹车试验中的载荷传递幅度更大,存在时间更长。
{"title":"Modelling and verification of a 12-DOF tractor-semitrailer longitudinal model for load transfer analysis","authors":"M.Z. Abdul Manaf, K. Hudha, P.M. Samin, S.A.A. Bakar","doi":"10.1504/ijhvs.2023.134312","DOIUrl":"https://doi.org/10.1504/ijhvs.2023.134312","url":null,"abstract":"The analysis of the longitudinal load transfer in a tractor-semitrailer provides vital information on the magnitude of the loads transferred between the tractor unit and the semitrailer unit. This study aims to develop a tractor-semitrailer longitudinal model for load transfer analysis based on a two-axle tractor and a single-axle semitrailer connected through a fifth-wheel hitch system. The model is simulated in the MATLAB Simulink software and verified using qualitative and quantitative comparison methods between the simulation and TruckSim data through the sudden acceleration and harsh braking tests. The dynamic behaviour of the developed tractor-semitrailer model agrees well with the TruckSim dynamic behaviour with an acceptable RMS error of less than 5%. The analysis of the longitudinal load transfer found that the load transfer during the harsh braking test had higher magnitudes and longer duration of existence than the sudden acceleration test.","PeriodicalId":54958,"journal":{"name":"International Journal of Heavy Vehicle Systems","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135051925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
International Journal of Heavy Vehicle Systems
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1