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Research on vibration response and vibration attenuation model of comprehensive transportation hub under multiple-source excitations 认领 引用
1
作者 Wu Qiaoyun Zhang Qingdong +2 位作者 Sun Jubo Chen Xuyong Xie Weiping 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2025年第2期527-545,共19页
To investigate the vibration response of the comprehensive transportation hub structure under multiple-source excitations,an on-site vibration measurement was carried out at Wuhan Railway Station in China.The characte... To investigate the vibration response of the comprehensive transportation hub structure under multiple-source excitations,an on-site vibration measurement was carried out at Wuhan Railway Station in China.The characteristics of each floor vibration were obtained through the time domain and frequency domain analyses.Based on the vibration characteristic under multiple-source excitations,the proposed attenuation model was derived.In addition,a vibration comfort evaluation on the Wuhan Railway Station was conducted.The results show that the effect of the number of vibration sources on horizontal acceleration is more significant than that regarding vertical acceleration.When the structure is under the effects two vibration sources with different frequencies,a high-frequency vibration can amplify a low-frequency vibration.The derived attenuation model can precisely predict the vibration attenuation and reduce the subsequent vibration test workload.Based on the annoyance rate model result,the annoyance rate of Wuhan Railway Station is high,which is harmful to the staff of the station. 展开更多
关键词 comprehensive transportation hub multiple-source excitations Wuhan Railway Station vibration measurement vibration attenuation model comfort evaluation
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Practical Polar Code Construction For Degraded Multiple-Relay Networks 认领 引用 被引量：2
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作者 Bin Duo Xiaoling Zhong Yong Guo 《China Communications》 SCIE CSCD 2017年第4期127-139,共13页
In this paper, based on the characteristics of polar codes, a new decode-and-forward strategy called generalized partial information relaying protocol is proposed for degraded multiple-relay networks with orthogonal r... In this paper, based on the characteristics of polar codes, a new decode-and-forward strategy called generalized partial information relaying protocol is proposed for degraded multiple-relay networks with orthogonal receiver components(MRNORCs). In such a protocol, with the help of partial information from previous nodes, each relay node tries to recover the received source message and re-encodes part of the decoded message for transmission to satisfy the decoding requirements for the following relay node or the destination node. In order to construct practical polar codes, the nested structures are developed based on this protocol and the information sets corresponding to the partial messages forwarded are also calculated. The proposed scheme is proved to be capable of achieving the theoretical capacity of the degraded MRN-ORCs while still retains the low-complexity feature of polar codes. We perform simulations to testify the practicability of the proposed scheme and compare polar codes by using successive-cancellation list decoder(SCLD) with traditional low-density parity-check(LDPC) codes. The results show that the obtained polar codes provide significant gain. 展开更多
关键词 cooperative communication multiple-relay networks channel capacity decode-and-forward polar codes
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A pendulum inertial electromagnetic energy harvester for harvesting multiple-source low-frequency human motion energy 认领 引用 被引量：1
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作者 Zhenghao WANG Lin HOU +1 位作者 Minghui YAO Tianzhi YANG 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2025年第10期112-121,共10页
The advancement of wearable devices continues to face the challenge of ensuring a sustainable power supply.Traditional human motion energy harvesters often suffer from low energy harvesting efficiency due to their rel... The advancement of wearable devices continues to face the challenge of ensuring a sustainable power supply.Traditional human motion energy harvesters often suffer from low energy harvesting efficiency due to their reliance on a single energy source.This study presents a novel pendulum inertial electromagnetic energy harvester(PI-EEH)to harvest multiplesource low-frequency human motion energy.The PI-EEH can simultaneously harvest both the leg swing energy and the foot impact energy during walking.A horizontal universal pendulum,combined with a frequency-up conversion mechanism,transforms irregular human motion into unidirectional high-frequency rotation.The output performance of the PI-EEH is evaluated through both theoretical analysis and experimental testing.A treadmill test is also conducted across various motion speeds to illustrate the benefits of PI-EEH.The peak power of PI-EEH can reach 54 mW at a speed of 3 km/h.Additionally,the PI-EEH can easily supply power for some wearable devices,like a GPS module and an acceleration sensor.The designed PIEEH offers a viable approach to harvesting energy from multiple-source human motion,which will have broad prospects in smart healthcare and IoT applications. 展开更多
关键词 energy harvesting multiple-source human motion energy horizontal universal pendulum wearable devices
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Development of a New-Type Multiple-Source Heat Pump with Two-Stage Compression 认领 引用 被引量：3
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作者 ZHONG Xiaohui YANG Hailong +1 位作者 YANG Ke XU Jianzhong 《Journal of Thermal Science》 SCIE EI CAS CSCD 2019年第4期635-642,共8页
A new-type multiple-source heat pump cycle with two-stage compression was established on the basis of the problems of similarly existing heat pumps.The equivalent temperature levels of typical evaporators are applied ... A new-type multiple-source heat pump cycle with two-stage compression was established on the basis of the problems of similarly existing heat pumps.The equivalent temperature levels of typical evaporators are applied to the different heat sources of the proposed cycle,and the high-temperature heat sources are shown to enhance vapor injection.Then,the mathematical model and prototype are developed,and the results from experimental simulation and validation showed that the solar collector can improve the heating performance of the proposed heat pump system.In the middle-temperature heating period,the outdoor temperature is less than-25℃,and the average coefficient of performance(COP)value of the proposed heat pump was 4.2,which was greater than the COPs of conventional ground source heat pumps. 展开更多
关键词 multiple-source heat pump two-stage compression solar collector simulation
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Face animation based on multiple sources and perspective alignment 认领 引用
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作者 Yuanzong MEI Wenyi WANG +5 位作者 Xi LIU Wei YONG Weijie WU Yifan ZHU Shuai WANG Jianwen CHEN 《虚拟现实与智能硬件（中英文）》 EI 2024年第3期252-266,共15页
Background Face image animation generates a synthetic human face video that harmoniously integrates the identity derived from the source image and facial motion obtained from the driving video.This technology could be... Background Face image animation generates a synthetic human face video that harmoniously integrates the identity derived from the source image and facial motion obtained from the driving video.This technology could be beneficial in multiple medical fields,such as diagnosis and privacy protection.Previous studies on face animation often relied on a single source image to generate an output video.With a significant pose difference between the source image and the driving frame,the quality of the generated video is likely to be suboptimal because the source image may not provide sufficient features for the warped feature map.Methods In this study,we propose a novel face-animation scheme based on multiple sources and perspective alignment to address these issues.We first introduce a multiple-source sampling and selection module to screen the optimal source image set from the provided driving video.We then propose an inter-frame interpolation and alignment module to further eliminate the misalignment between the selected source image and the driving frame.Conclusions The proposed method exhibits superior performance in terms of objective metrics and visual quality in large-angle animation scenes compared to other state-of-the-art face animation methods.It indicates the effectiveness of the proposed method in addressing the distortion issues in large-angle animation. 展开更多
关键词 Face animation Multiple-source driving Generative adversarial network Medical diagnostics
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