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| 1 | Cross-media Hot Topic Auto-tracking Model Based on Semantics and Temporal Context显示文摘As the Internet multimedia information grows explosively, seeking an automatic technology to realize the effective organization and management of crossmedia emergency information is significantly necessary. A novel cross-media hot topic auto-tracking model based on semantics and temporal context is proposed in this paper. According to the semantic correlations of cross-media information, we learn the image visual semantics by the text semantics based on the Latent Dirichlet Allocation probability model, and establish the unified cross-media information description on the same semantic level. Also a semantics-based two-step feature dimension-reduction scheme is proposed to establish the efficient semantic feature space. The self-adaptive learning of topic model is realized to track the dynamic changes in the topic. Experimental results demonstrate that the proposed method outperforms the existing methods, which further improves the effect of hot topic auto-tracking. | LIANG Meiyu DU Junping ZHOU Yipeng | 2015 | Chinese Journal of Electronics2015，24，3： | 3 |
| 2 | Effect of inhomogeneous broadening on threshold current of GaN-based green laser diodes显示文摘The inhomogeneous broadening parameter and the internal loss of green LDs are determined by experiments and theoretical fitting. It is found that the inhomogeneous broadening plays an important role on the threshold current density of green LDs. The green LD with large inhomogeneous broadening even cannot lase. Therefore, reducing inhomogeneous broadening is a key issue to improve the performance of green LDs. | Yipeng Liang Jianping Liu Masao Ikeda Aiqin Tian Renlin Zhou Shuming Zhang Tong Liu Deyao Li Liqun Zhang Hui Yang | 2019 | Journal of Semiconductors2019，40，5： | 3 |
| 3 | Application of Serial Section Method to Determine the Radiotherapy Target Volume for Esophageal Squamous Carcinoma显示文摘 | Yipeng Song Yemin Liang Rukun Zang Likuan Hu Shiguan Zhu | 2013 | Cell Biochemistry and Biophysics2013，，： | 1 |
| 4 | Operational Mode Identification Based on Sliding Time Window Method and Eigensystem Realization Algorithm显示文摘The identification result of operational mode is eurychoric while operational mode identification is investigated under ambient excitation,which is influenced by the signal size and the time interval.The operational mode identification method,which is based on the sliding time window method and the eigensystem realization algorithm(ERA),is investigated to improve the identification accuracy and stability.Firstly,the theory of the ERA method is introduced.Secondly,the strategy for decomposition and implementation is put forward,including the sliding time window method and the filtration method of modes.At last,an example is studied,where the model of a cantilever beam is built and the white noise exciting is input.Results show that the operational mode identification method can realize the modes,and has high robustness to the signal to noise ratio and signal size. | WANG Liang ZHANG Yan CAI Yipeng NANGONG Zijun | 2019 | Transactions of Nanjing University of Aeronautics and Astronautics2019，36，5： | 0 |
| 5 | Preparation of PVA@PEI@BAC@CNC composite nanofibrous film with high efficiency filtration for PM2.5显示文摘It is still a challenge to prepare a water-and polymer-based electrospun air filter film with high efficiency filtration,low pressure drop,and good mechanical properties.To address this issue,polyvinyl alcohol(PVA)was employed as the main material,mixing polyethyleneimine(PEI),bamboo-based activated carbon(BAC)and cellulose nanocrystal(CNC)to construct the air filter film by electrostatic electrospinning.In this system,the negatively charged BAC and CNC are fixed in the system through bonding with the positively charged PEI,showing a double adsorption effect.One is the mechanical filtration of the porous network structure constructed by PVA@PEI electrospun nanofibers,and the other is the electrostatic adsorption of PM2.5 on the surface of BAC and CNC.It is significant that the resulting composite air filter displays a high filtration efficiency of 95.86%,a pressure drop of only 59 Pa,and good thermal stability.Moreover,the introduced methyltrimethoxysilane(MTMS)endows it with good water-resistance.Given these excellent performances,this system can provide theoretical and technical references for the development of water-and polymerbased electrospun air filter film. | Jingda Huang Yi Wang Yuxin Cai Yipeng Liang Shite Lin Enfu Wang Jinhuan Zhong Wenbiao Zhang Kuichuan Sheng | 2023 | Frontiers of Materials Science2023，17，4： | 0 |
| 6 | Sum-rate maximization for UAV-enabled two-way relay systems显示文摘In this paper,an Unmanned Aerial Vehicle(UAV)-enabled two-way relay system with Physical-layer Network Coding(PNC)protocol is considered.A rotary-wing UAV is applied as a mobile relay to assist two ground terminals for information interaction.Our goal is to maximize the sum-rate of the two-way relay system subject to mobility constraints,propulsion power consumption constraints,and transmit power constraints.The formulated problem is not easy to solve directly because it is a mixed integer non-convex optimization problem.Therefore,we decompose it into three sub-problems,and use the mutation arithmetic of the Genetic Algorithm(GA)and Successive Convex Approximation(SCA)to dispose.Besides,a high-efficiency iterative algorithm is proposed to obtain a locally optimal solution by jointly optimizing the time slot pairing,the transmit power allocation,and the UAV trajectory design.Numerical results demonstrate that the proposed design achieves significant gains over the benchmark designs. | Keju Lu Fahui Wu Lin Xiao Yipeng Liang Dingcheng Yang | 2022 | Digital Communications and Networks2022，8，6： | 0 |
| 7 | Late Quaternary Slip Behavior of the Jinqianghe Fault in the Middle Qilian-Haiyuan Fault Zone,Northeastern Tibetan Plateau显示文摘The Qilian-Haiyuan fault zone in the northeastern Tibetan Plateau has been the source of strong earthquakes in the region.In its middle segment,the Jinqianghe fault is an important active fault within the Tianzhu seismic gap;however,little is known about its slip behavior.To present a new horizontal displacement distribution along this fault,we used WorldView-2 stereo pairs and unmanned aerial vehicle-based photogrammetry to construct digital elevation models to obtain a detailed tectono-geomorphic interpretation and geomorphic offsets.The offset marker measurements yielded 135 geomorphic displacements and 8 offset clusters.Radiocarbon dating was used to establish the regional age sequence of the geomorphic units in offset fluvial terraces at four study sites.The displacements and ages linked the offset clusters with the geomorphic unit sequence;the Holocene strike-slip rate of the Jinqianghe fault was estimated to 4.8-5.6 mm/a at~4-12 ka and 2.9-4.7 mm/a from~4 ka.Three recent earthquakes(with a recurrence interval of~1000 years)represent an active seismic period,revealing the potential seismic hazard along this fault because it has not ruptured in the last 1500 years. | LIANG Shumin ZHENG Wenjun CHEN Gan ZHANG Peizhen ZHANG Dongli BI Haiyun YANG Xue ZHANG Yipeng DUAN Lei LU Bentian | 2022 | Acta Geologica Sinica(English Edition)2022，96，3： | 0 |
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