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Journal of Energy Chemistry 2025年第1期100卷 215-225页

作者： Jiaye Li Shuang Pan Yihuang Chen qiong liu College of Chemistry and Materials Engineering Wenzhou University Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology (China) Institute of Analysis Guangdong Academy of Sciences (China National Analytical CenterGuangzhou)

Photocatalytic oxygen reduction for hydrogen peroxide （H2O2） synthesis presents a green and costeffective production ***,achieving highly selective H2O2synthesis remains challenging,necessitating precise control over free radical reaction pathways and minimizing undesirable oxidative ***,we report for the visible light-driven simultaneous co-photocatalytic reduction of O2to H2O2and oxidation of biomass using the atomic rubidium-nitride modified carbon nitride（CNRb）.The optimized CNRb catalyst demonstrates a record photoreduction rate of 8.01 mM h-1for H2O2generation and photooxidation rate of 3.75 mM h-1for furfuryl alcohol to furoic acid,achieving a remarkable solar-to-chemical conversion （SCC） efficiency of up to 2.27%.Experimental characterizations and DFT calculation disclosed that the introducing atomic Rb–N configurations allows for the high-selective generation of superoxide radicals while suppressing hydroxyl free radical *** is because the Rb–N serves as the new alternative site to perceive a stronger connection position for O2adsorption and reinforce the capability to extract protons,thereby triggering a high selective redox product *** study holds great potential in precisely regulating reactive radical processes at the atomic level,thereby paving the way for efficient synthesis of H2O2coupled with biomass valorization.

关键词： Atomic economy Radical pathway regulation Rubidium atom coordination Biomass valorization

A WISE view of IRAS debris disks: revising the dust properties

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Research in Astronomy and Astrophysics 2021年第3期21卷 86-96页

作者： qiong liu Department of Physics Guizhou UniversityGuiyang 550025China

Debris disks around stars are considered as components of planetary *** the dust properties of these disks can give crucial information to formation and evolution of planetary *** an all-sky survey,InfRared Astronomical Satellite(IRAS)gave great contribution to the debris disk searching which discovered the first debris disk host star(Vega).The IRAS-detected debris disk sample published by Rhee(Rhee et al.2007)contains 146 stars with detailed information of dust *** the dust properties of 45 of them still cannot be determined due to the limitations with the IRAS database(have IRAS detection at 60μm only).Therefore,using more sensitivity data of Wide-.field Infrared Survey Explorer(WISE),we can better characterize the sample stars:for the stars with IRAS detection at 60μm only,we refit the excessive flux densities and obtain the dust temperatures and fractional luminosities;while for the remaining stars with multi-bands IRAS detections,the dust properties are revised which show that the dust temperatures were overestimated in the high temperature band ***,we identify 17 stars with excesses at the WISE 22μm which have smaller distribution of distance from Earth and higher fractional luminosities than the other stars without mid-infrared excess *** them,15 stars can be found in previous works.

关键词： (stars:)circumstellar matter protoplanetary disks infrared:stars

Theoretical models and experimental determination methods for equations of state of silicate melts: A review

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Science China Earth Sciences 2019年第5期62卷 751-770页

作者： Juntao HOU qiong liu MOE Key Laboratory of Orogenic Belt and Crustal Evolution School of Earth and Space Sciences Peking University

Silicate melts are very active in the interior of the Earth and other terrestrial planets, and are important carriers for the transport of material and energy. The determination of the equation of state(EOS) for silicate melts and the acquisition of a precise quantitative relationship between molar volume(or density) and temperature, pressure, and composition is essential for simulating the generation, migration, and eruption processes of magmas and the evolution of the magma ocean stage during the early formation of the Earth and other terrestrial planets, for calculating and modeling the phase equilibria involving silicate melts, and for revealing the variation of the microstructure of silicate melts with pressure. However, it is experimentally challenging to determine the volumetric properties of silicate melts and the accumulated density data at high pressure are still very limited due to a series of problems such as: the high liquidus temperature of silicate rocks; proneness for silicate melts to react with sample capsules to change the melt composition; and proneness for melts to flow and leak during the high pressure and high temperature experiments. In recent years, there is rapid progress in the high pressure and high temperature experimental techniques, in terms of not only the extension of temperature and pressure ranges but also the improvement on the accuracy of measurements, and the emergence of new methods for in-situ measurements. Here, we review the widely-used theoretical models of ambient-pressure and high-pressure EOS for silicate melts, and illustrate some problems that need to be solved urgently:(1) the room pressure EOS for iron-and titanium-bearing silicate melts needs to be improved;(2) the partial molar properties of the H2 O and CO2 components in silicate melts containing volatile components may vary markedly with the melt composition, which need to be addressed in high-pressure EOS;(3) how the formulation and applicable range of EOS corre

关键词： Silicate melts Equations of state Theoretical models Determination methods Melt structure Compression mechanisms

Studying cost-sensitive learning for multi-class imbalance in Internet traffic classification

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The Journal of China Universities of Posts and Telecommunications 2012年第6期19卷 63-72页

作者： liu Zhen liu qiong School of Soft Engineering South China University of Technology School of Computer Science and Engineering South China University of Technology

Cost-sensitive learning has been applied to resolve the multi-class imbalance problem in Internet traffic classification and it has achieved considerable results. But the classification performance on the minority classes with a few bytes is still unhopeful because the existing research only focuses on the classes with a large amount of bytes. Therefore, the class-dependent misclassification cost is studied. Firstly, the flow rate based cost matrix （FCM） is investigated. Secondly, a new cost matrix named weighted cost matrix （WCM） is proposed, which calculates a reasonable weight for each cost of FCM by regarding the data imbalance degree and classification accuracy of each class. It is able to further improve the classification performance on the difficult minority class （the class with more flows but worse classification accuracy）. Experimental results on twelve real traffic datasets show that FCM and WCM obtain more than 92% flow g-mean and 80% byte g-mean on average; on the test set collected one year later, WCM outperforms FCM in terms of stability.

关键词： Internet traffic classification minority class cost matrix machine learning

Answering queries using cooperative semantic cache in mobile computing environments

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The Journal of China Universities of Posts and Telecommunications 2012年第3期19卷 54-59页

作者： LIANG Ru-bing liu qiong College of Science South China Agricultural University Guangzhou 510642 China School of Computer Science and Engineering South China University of Technology Guangzhou 510006 China

In cooperative cache research domain, most of previous work engage in peer-to-peer systems and distributed systems, but do not involve applying cooperative semantic cache in mobile computing environments, which wireless communications disconnect at times and clients move frequently. In this paper, we extend the general semantic cache mechanism by enabling mobile clients to share their local semantic caches in a cooperative matter, and the process way and flow chart of the algorithm are described in detail. In addition, we discuss the methods used in cache consistence maintenance, which focus on confirm receiver of the periodic cache invalidation report and the process of validate client＇s local cache. The experiment results indicate cooperative semantic cache mechanism could reduce query response time and increase cache hit ratio effectively.

关键词： cooperative semantic cache cache consistence mobile computing

Commutative Rings Whose Zero-divisor Graph Is a Proper Refinement of a Star Graph

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Acta Mathematica Sinica,English Series 2011年第6期27卷 1221-1232页

作者： qiong liu Tong Suo WU Department of Mathematics and Physics Shanghai University of Electric Power Shanghai 201300 P. R. China Department of Mathematics Shanghai Jiaotong University Shanghai 200240 P. R. China

A graph is called a proper refinement of a star graph if it is a refinement of a star graph, but it is neither a star graph nor a complete graph. For a refinement of a star graph G with center c, let G＊ be the subgraph of G induced on the vertex set V（G）／ {c or end vertices adjacent to c}. In this paper, we study the isomorphic classification of some finite commutative local rings R by investigating their zero-divisor graphs G=Г（R）, which is a proper refinement of a star graph with exactly one center c. We determine all finite commutative local rings R such that G＊ has at least two connected components. We prove that the diameter of the induced graph G＊ is two if Z（R）2 ≠{0}, Z（R）3 = {0} and Gc is connected. We determine the structure of R which has two distinct nonadjacent vertices a, fl C Z（R）＊／{c} such that the ideal [N（a）N（β）]{0} is generated by only one element of Z（R）＊／{c}. We also completely determine the correspondence between commutative rings and finite complete graphs Kn with some end vertices adjacent to a single vertex of Kn.

关键词： Commutative rings zero-divisor graph minimal generating set connected component

Finite Rings Whose Graphs Have Clique Number Less than Five

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Algebra Colloquium 2021年第3期28卷 533-540页

作者： qiong liu Tongsuo Wu Jin Guo Department of Mathematics Shanghai University of Electric Power Shanghai 200090China School of Mathematical Sciences Shanghai Jiao Tong University Shanghai 200240China School of Science Hainan UniversityHaikou 570228China

Let R be a commutative ring and Γ(R)be its zero-divisor *** completely determine the structure of all finite commutative rings whose zero-divisor graphs have clique number one,two,or ***,if R■R1×R2×…×Rn(each Ri is local for i=1,2,3,...,n),we also give algebraic characterizations of the ring R when the clique number of Γ(R)is four.

关键词： finite commutative rings refinements of star graph clique number

Semi-Global Depth Estimation Algorithm for Mobile 3-D Video Applications

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Tsinghua Science and Technology 2012年第2期17卷 128-135页

作者： qiong liu Hongjiang Xiao Department of Automation Tsinghua UniversityBeijing 100084China Department of Electronics and Information Engineering Huazhong University of Science and TechnologyWuhan 430074China Academy of Broadcasting Planning SARFT Beijing 100866China

Three-dimensional （3-D） video applications, such as 3-D cinema, 3DTV, ana Free Viewpomt Video （FVV） are attracting more attention both from the industry and in the literature. High accuracy of depth video is a fundamental prerequisite for most 3-D applications. However, accurate depth requires computationally intensive global optimization. This high computational complexity is one of the bottlenecks to applying depth generation to 3-D applications, especially for mobile networks since mobile terminals usually have limited computing ability. This paper presents a semi-global depth estimation algorithm based on temporal consis- tency, where the depth propagation is used to generate initial depth values for the computationally intensive global optimization. The accuracy of initial depth is improved by detecting and eliminating the depth propagation outliers before the global optimization. Integrating the initial values without outliers into the global optimization reduces the computational complexity while maintaining the depth accuracy. Tests demonstrate that the algorithm reduces the total computational time by 54%-65% while the quality of the virtual views is essentially equivalent to the benchmark.

关键词： 3-D video depth estimation temporal propagation graph cuts

On the Stylistic and Cultural Awareness of Chen Yan's Novels: Taking The Protagonist and The Backstage Clan as Examples

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Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2023年第1期17卷 35-56页

作者： liu qiong Department of Literary and Art Review People's DailyBeijing 100733China

The Protagonist is another full-length masterpiece of realism by Chen Yan following his previous novel The Backstage *** rich experience in drama creation enables Chen Yan to skillfullyemployclassical literature and traditional opera librettos,and be keener on entering a narrative where novel and opera communicate without any barriers,thereby forming his distinctive narrative *** addition,Chen Yan has proficiently created in the abovementioned books typical characters such as Diao Shunzi and Yi Qin'e,creating a blueprint for how these two novels will be passed down to later *** The Backstage Clan,which focuses on the extraordinary nature of ordinary people,The Protagonist presents the potential of the rise of ordinary people and a panorama of man and culture by portraying the legendary lives of the protagonist and the secondary protagonist.

关键词： Chen Yan The Protagonist The Backstage Clan stylistic awareness cultural awareness

Comparative proteomics analysis of lanthanum citrate complex-induced apoptosis in HeLa cells

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Science China Chemistry 2009年第11期52卷 1814-1820页

作者： SHEN LiMing liu qiong NI JiaZuan College of Life Sciences Shenzhen UniversityShenzhen 518060China

In a previous study,the lanthanum citrate complex([LaCit2]3-) has been found to induce apoptosis in the human HeLa cervical cancer cell *** clarify the mechanism,we carried out comparative proteomics analysis between treated and control *** expressed proteins were separated electrophoretically and identified by MALDI-TOF/TOF tandem mass *** were profound changes in 14 proteins related to mitochondrial function and oxidative stress,suggesting that mitochondrial dysfunction plays a key role in [LaCit2]3--induced *** was confirmed by a decrease in the mitochondrial transmembrane potential,and increases in cytochrome c release and reactive oxygen species generation in [LaCit2]3--treated *** blotting analyses show that [LaCit2]3--induced apoptosis was accompanied by the activation of caspase-9 and the specific proteolytic cleavage of PARP,leading to an increase in the proapoptotic protein Bax and a decrease in the antiapoptotic protein *** results suggest that [LaCit2]3-induced the apoptosis of HeLa cells through oxidative stress mediated pathway involving MT participation.

关键词： lanthanum citrate complex HeLa cells proteomics