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RISS 인기검색어
- 검색키워드
- 저자 : Jingran Wang (검색결과 3 건)
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Relay Selection Fairness and Resource Allocation for OFDMA Networks
Jingran Huang,Fang Wang,Shouyi Yang 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.6
In this paper, resource allocation for a relay-based multi-user Orthogonal Frequency-Division Multiple Access (OFDMA) uplink system is studied. All the relays adopt the decode-and-forward protocol and assist the transmission from the source to destination. In current wireless networks, the terminal depends more on battery power. Given that, battery life is limited, prolonging the service life of equipment is a key problem in ensuring the information transmission and in reducing the financial burden of the batteries. We aim to maximize the survival time of the relay system and to reduce the rate of loss. Therefore, we formulate the problem in which the subcarriers select the optimal relay based on both the channel gain and the residual capacity of the relays. We also consider a weighting factor that reflects the residual capacity of different relays. Simulation results show that the proposed algorithms can achieve longer survival time of the relay systems.
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Yurong Guo,Yanan Wang,Yingdan Gao,Jingran Zhang,Chao Wang,Guangjiu Zhao 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.120 No.-
The 1,8-naphthalimide derivatives as the guest and the benzophenone (BP) analogues bis(4-chlorophenyl)methanone (BP2C) and bis(4-fluorophenyl)methanone (BP2F) benzophenone derivativesas the host, we constructed a series of novel doping systems with fluorescence and room temperaturephosphorescence (RTP) dual emission. The steady-state spectroscopy, ultrafast spectroscopy techniques,and theoretical calculations indicate that Förster resonance energy transfer (FRET) between singlet statesbetween host and guest components enables energy redistribution in doped systems. At the same time,the Dexter energy transfer (DET) between the triplet states realizes the obvious absorption of the excitedtriplet state of the guest, resulting in the long-lived room temperature phosphorescence of the doped system. Doping materials have unlimited potential for information storage and anti-counterfeiting byexploiting the properties of photo activation.
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Thermal management analysis of serial-connection three-chamber piezoelectric pump
Lipeng He,Xiaoqiang Wu,Zheng Zhang,Jingran Wang,Dianbin Hu,Yamei Liu,Guangming Cheng 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.10
The design of a micropump with high performance and excellent reliability on thermal management still remains a challenge for electronic cooling. The performance of a piezoelectric pump with 3 chambers connected in series on thermal management was investigated for electronic cooling in this study. Two S-shaped channel heat sinks and the piezoelectric pump with 3 chambers connected in series were combined to form a loop cooling system. With water as the pumping medium, the tested pump has a flow rate most up to 690.6 ml/min at an input voltage of 220 V and an input frequency of 110 Hz. Suitability of the system has been demonstrated through simulation analysis and experimental verification for temperature control. A temperature reduction of 3 °C of CPU could be achieved at 250 mL/min flow rate generated by the piezoelectric pump with 3 chambers connected in series.
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