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Representation learning on textual network with personalized Page Rank

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Science China(Information Sciences) 2021年第11期64卷 95-104页

作者： teng li Yong DOU National Laboratory for Parallel and Distributed Processing National University of Defense Technology

Representation learning on textual network or textual network embedding, which leverages rich textual information associated with the network structure to learn low-dimensional embedding of vertices, has been useful in a variety of tasks. However, most approaches learn textual network embedding by using direct neighbors. In this paper, we employ a powerful and spatially localized operation: personalized Page Rank(PPR) to eliminate the restriction of using only the direct connection relationship. Also, we analyze the relationship between PPR and spectral-domain theory, which provides insight into the empirical performance boost. From the experiment, we discovered that the proposed method provides a great improvement in linkprediction tasks, when compared to existing methods, achieving a new state-of-the-art on several real-world benchmark datasets.

关键词： representation learning network embedding PageRank textual network personalized PageRank

S-scheme heterojunction in photocatalytic hydrogen production

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Journal of Materials Science & Technology 2024年第2期169卷 82-104页

作者： teng li Noritatsu Tsubaki Zhiliang Jin School of Chemistry and Chemical Engineering North Minzu UniversityYinchuan 750021China Department of Applied Chemistry Graduate School of EngineeringUniversity of ToyamaGofuku 3190Toyama 930-8555Japan

As an ideal secondary energy source,hydrogen has the title of clean energy and the product of its complete combustion is only water,which is not polluting to the *** hydrogen production technology is an environmentally friendly,safe,and low-cost strategy that requires only an inexhaustible amount of solar energy and water as *** paper provides a detailed and detailed review of S-scheme heterojunction photocatalysts for photocatalytic hydrogen production,mainly including TiO_(2)-based,Perovskite-based,CdS-based,Graphitic phase carbon nitride-based,COF-based graphdiyne-based,ZnO-based,and ZnIn_(2)S_(4)-based S-scheme heterojunction *** classification of S-scheme heterojunctions is ***’s more,various characterizations for direct verification of the charge migration mechanism of S-scheme heterojunctions are *** on the present study,the future potential challenges and future research trends for S-scheme heterojunctions in photocatalytic hydrogen evolution technology are pointed out,which provides feasible strategies for the development and design of S-scheme heterojunction photocatalysts in the field of photocatalytic hydrogen evolution.

关键词： S-scheme heterojunction Photocatalysis Charges migration Hydrogen evolution

Experimental Investigation on Flame Characterization and Temperature Profile of Single/Multiple Pool Fire in Cross Wind

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Journal of Thermal Science 2021年第1期30卷 324-332页

作者： CHEN Zhen WEI Xiaolin li teng Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Energy and Power EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of High Temperature Gas Dynamics Institute of MechanicsChinese Academy of SciencesBeijing 100190China

An experimental study was carried out to investigate the flame characterization and temperature profile for single and multiple pool fire with the influence of cross *** were 13 test cases in total,categorized into circle and rectangle fuel pans,with diameter(or equivalent diameter)ranged from 50 mm to 300 *** was used for the fuel of pool *** K-type thermocouples were arranged around the flame to monitor the flame temperature,while the flame tilt angle was measured based on the photograph of flame for different ***,it can be found that there are three phases,including preheating,steady burning and extinguishing phase,during the flame *** maximum temperature near the fuel surface is~1040 K,which is higher than that of flame plume(~600 K),in the steady burning phase of circle single pool fire(D=300 mm),while the average burning rate is~1.525 g/*** addition,the burning rates of all cases were measured and compared with the current predicted ***,the flame morphology of single/multiple pool fire at different cross wind speed(ranging from 0 to 3.5 m/s)was analyzed,and it is found that the results for single pool fire agree with Thomas model and AGA model well,which are not suitable for multiple pool ***,the temperature profile of different case was measured with various wind speed.

关键词： pool fire temperature profile flame characteristic kerosene cross wind

Progress of Studies on Multi-Color Long Afterglow Luminescence Materials

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Journal of Rare Earths 2004年第Z1期22卷 295-301页

作者： li Qun teng Xiaoming General Research Institute for Nonferrous Metals Beijing 100088 Grirem Advanced Materials Co.Ltd.Beijing 100088 China Institute of Chemistry and Material Science Anhui Normal University Wuhu241000 China

Progress of studies on various multi-color long afterglow luminescence materials was *** luminescent mechanism of long afterglow behavior were *** research and development prospects about the materials were proposed.

关键词： long afterlow materials mechanism luminescence rare earths

IR study on surface chemical properties of catalytic grown carbon nanotubes and nanofibers

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第5期9卷 720-726页

作者： li-hua teng Tian-di TANG Institute of Biology and Environmental Science Zhejiang Wanli University Ningbo 315100 China College of Chemistry Northeast Normal University Changchun 130024 China）

In this study, the surface chemical properties of carbon nanotubes (CNTs) and carbon nanofibers (CNFs) grown by catalytic decomposition of methane on nickel and cobalt based catalysts were studied by DRIFT (Diffuse Reflectance Infrared Fourier Transform) and transmission Infrared (IR) spectroscopy. The results show that the surface exists not only carbon-hydrogen groups, but also carboxyl, ketene or quinone (carbonyl) oxygen-containing groups. These functional groups were formed in the process of the material growth, which result in large amount of chemical defect sites on the walls.

关键词： Carbon nanotubes (CNTs) Carbon nanofibers (CNFs) Functional surface groups Infrared (IR) spectroscopy

Net Pro: detecting attacks in MANET routing with provenance and verification

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Science China(Information Sciences) 2017年第11期60卷 253-255页

作者： teng li Jianfeng MA Cong SUN School of Computer Science and Technology Xidian University School of Cyber Engineering Xidian University

The Mobile Ad hoc Network(MANET)is a continuously self-configuring network of a collection of mobile devices with neither a defined infrastructure nor a central administration facility[1].The primary goal of MANET routing is to provide a secure,correct,and efficient path to the target node such that the data are transmitted quickly and are not *** a passive attack,in which the network intruder attempts to eavesdrop on the communication,there exist many types of active attacks that tend to damage the network by changing the data stored within the MANET.

关键词： MANET Net Pro detecting attacks in MANET routing with provenance and verification

April-September minimum temperature reconstruction based on Sabina tibetica ring-width chronology in the central eastern Tibetan Plateau,China

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Journal of Forestry Research 2024年第2期35卷 134-145页

作者： teng li Jianfeng Peng Tsun Fung Au Jinbao li School of Geography and Remote Sensing Guangzhou UniversityGuangzhou 510006People’s Republic of China College of Geography and Environmental Science Henan UniversityKaifeng 475004People’s Republic of China Institute for Global Change Biology School for Environment and SustainabilityUniversity of MichiganAnn ArborMIUSA Department of Ecology and Evolutionary Biology University of MichiganAnn ArborMIUSA Department of Geography University of Hong KongHong Kong SARPeople’s Republic of China HKU Shenzhen Institute of Research and Innovation Shenzhen 518057People’s Republic of China

Minimum temperatures have remarkable impacts on tree growth at high-elevation sites on the Tibetan Plateau,but the shortage of long-term and high-resolution paleoclimate records inhibits understanding of recent minimum temperature *** this study,a warm season(April–September)reconstruction is presented for the past 467 years(1550–2016)based on Sabina tibetica ring-width chronology on the lianbaoyeze Mountain of the central eastern Tibetan *** warm periods and eight cold periods were ***-term minimum temperature variations revealed a high degree of coherence with nearby *** correlations between our reconstruction and global sea surface temperatures suggest that warm season minimum temperature anomalies in the central eastern Tibetan Plateau were strongly influenced by large-scale ocean atmospheric circulations,such as the El Ni?o-Southern Oscillation and the Atlantic Multidecadal Oscillation.

关键词： Tree-ring analysis Sabina tibetica Minimum temperatures Central eastern Tibetan Plateau Climate change

Maturity effects on steranes of source rocks in lishu fault depression,Songliao Basin

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Acta Geochimica 2020年第4期39卷 561-573页

作者： Chuanjun Yi Min Zhang li teng College of Resources and Environment Yangtze UniversityWuhanPeople's Republic of China Key Laboratory of Exploration Technology for Oil and Gas Resource Ministry of EducationWuhanPeople's Republic of China

Geochemical analysis results of 30 source rock samples from lishu fault depression in Songliao Basin show that samples are compositionally similar and represent a uniform organic *** distribution of steranes among the samples is due to rank,with vitrinite reflectances(Ro)ranging from 0.65 to 1.61%.In the maturity stage(Ro=0.65-1.20%),the absolute concentrations of steranes increase,which is affected by kerogen degradation,whereas the pyrolysis of high mature source(Ro=1.20-1.61%)show a decrease in the abundance of ***,the parameters of steranes vary greatly with *** of prognane/regular sterane value with the increase of maturity suggests that pregnane is not a product of regular steranes *** ratios of C27/C29regular sterane gradually increase,while the value of C29-20S/(20S+20R)and αββ/(αββ+ααα)decrease at high maturity stage,which is associated with the difference in the thermostability of steranes *** reversed trend can be used to determine the high-maturity stage of source *** the values of rearranged steranes/regular steranes in source rocks show an apparent positive correlation with maturity,it,therefore,appears to be particularly useful for maturity assessment at elevated levels.

关键词： Thermal effect Steranes Genetic mechanism Lacustrine source rocks Maturity

Numerical study of the rotor thickness noise reduction based on the concept of sound field cancellation

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Chinese Journal of Aeronautics 2022年第3期35卷 214-233页

作者： Runze XIA Yongjie SHI teng li Guohua XU National Key Laboratory of Rotorcraft Aeromechanics Nanjing University of Aeronautics and AstronauticsNanjing 210016China China Helicopter Research and Development Institute Jingdezhen 333001China

Numerical studies were performed to investigate the mechanism and potential of several active rotors for reducing low-frequency in-plane thickness noise generated by rotating blades.A numerical method coupling the blade element theory,prescribed wake model and Fowcs Williams-Hawkings(FW-H)equation was established for rotor noise *** is indicated that the excitation force on the blade tip can generate anti-noise that to partly cancel the in-plane thickness noise with an appropriate actuation *** from the phase,frequency and amplitude sweeps show that the excitation force direction and actuation law are the crucial factors affecting the noise reduction,which determine the noise reduction area in the elevation and azimuth directions,*** active trailing-flap rotor can generate the in-plane excitation force,but because of large lift-drag ratio the anti-noise is mainly from the vertical lift,which is caused by flap deflection similar to a variable camber *** the harmonic control rotor and active twist rotor,the excitation force is also attributed to the vertical blade *** vertical force can reduce the noise near the rotor plane,it will also cause the noise increase in most other ***,two new active rotors were proposed to generate the in-plane chordwise and spanwise excitation *** the modified actuation law,the noise in most areas around the rotor was reduced,which improved the acoustic characteristics of rotor significantly.

关键词： Active rotor Helicopter Noise reduction Sound field cancellation Thickness noise