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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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Sun, Jingran,Li, Xiangyu World Association for Triple Helix and Future Stra 2015 Journal of Contemporary Eastern Asia Vol.14 No.2
Many people criticized how the Chinese government responded to the Wenchuan Earthquake. They focused on how it failed to address the psychological needs of the survivors. The study presented here approached this issue from a human resources perspective. It was determined that the Chinese government approached the situation in a bureaucratic way that limited the government's capacity and barred non-profit organizations and community groups from participating. It was also found that survivors could not contact these organizations for psychological support. This study concludes that the situation called for a more flexible and improvised institution that would respond to the emerging needs of survivors.
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Rong Wan,Jingran Liu,Zhengmei Yang,Panpan Zhu,Qinghe Cao,Tao Xu 한국유전학회 2020 Genes & Genomics Vol.42 No.3
Background DEAD-box protein family is the largest subfamily of RNA helicases and plays an important role in RNA metabolism and plant growth, development, and stress responses. Although DEAD-box genes have been characterized in various major crop plants, their identification and characterization in Convolvulaceae is still in infancy. Sweet potato (Ipomoea batatas, in Convolvulaceae) is the seventh most important crop in the world. Ipomoea trifida is one of the ancestors of sweet potato and is an effective resource for sweet potato cross-breeding. Objective Identification and characterisation of DEAD-box transcription factors in sweet potato wild ancestor I. trifida genome. Method A systematic genome-wide analysis was conducted to identify the DEAD-box transcription factors in the I. trifida genome. Results We identified 17 ItfDEAD-box genes which distributed unevenly on the nine chromosomes of I. trifida and encoded 29 DEAD transcripts. The phylogenetic analysis classified the DEAD-box proteins into nine groups named I–IX. Homology model prediction of ItfDEAD-box proteins obtained 14 models which lay a preliminary foundation for the further functional exploration of the ItfDEAD-box proteins. The tissue-specific and abiotic stress-responsive expression profiles of ItfDEAD-box genes were analyzed in different tissues and under abiotic stress responses by RNA-seq data and confirmed by quantitative PCR analysis. Some genes were significantly up- or down-regulated by different abiotic stress, suggesting that ItfDEAD-box plays a crucial role in stress responses in I. trifida. Conclusion The identification and gene expression of the ItfDEAD-box gene family might shed light on the function exploration of DEAD-box gene in I. trifida and promote the molecular breeding of sweet potato.
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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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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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