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Convergence of Broadband and Broadcast/Multicast in Maritime Information Networks

Tsinghua Science and Technology 2021年第5期26卷 592-607页

作者： Jun Du jian Song yong Ren Jintao Wang the Department of Electronic Engineering Tsinghua UniversityBeijing 100084China the Institute for Ocean Engineering Tsinghua UniversityBeijing 100084 Peng Cheng Laboratory Shenzhen 518055China the Beijing National Research Center for Information Science and Technology Tsinghua UniversityBeijing 100084 the Key Laboratory of Digital TV System of Guangdong Province and Shenzhen City Research Institute of Tsinghua UniversityShenzhen 518057China

Recently,the fifth-generation(5G)of wireless networks mainly focuses on the terrestrial ***,the well-developed emerging technologies in 5G are hardly applied to the maritime communications,resulting from the lack of communication infrastructure deployed on the vast ocean,as well as different characteristics of wireless propagation environment over the sea and maritime user *** satisfy the expected plethora of broadband communications and multimedia applications on the ocean,a brand-new maritime information network with a comprehensive coverage capacity in terms of all-hour,all-weather,and all-sea-area has been expected as a revolutionary paradigm to extend the terrestrial capacity of enhanced broadband,massive access,ultra-reliable,and low-latency to the vast *** considering the limited available resource of maritime communication infrastructure,the convergence of broadband and broadcast/multicast can be regarded as a possible yet practical solution for realizing an efficient and flexible resource configuration with high quality of ***,according to such multi-functionality and all-coverage maritime information network,the monitoring and sensing of vast ocean area relying on massive Ocean of Things and advanced radar techniques can be also *** these issues above,this study proposes a Software Defined Networking(SDN)based Maritime Giant Cellular Network(MagicNet)architecture for broadband and multimedia *** on this network,the convergence techniques of broadband and broadcast/multicast,and their supporting for maritime monitoring and marine sensing are also introduced and surveyed.

关键词： Maritime Giant Cel ular Network(Magic Net) integrated broadcast-multicast-unicast communications maritime multimedia services Ocean of Things(OoT) al-coverage

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Effective Identification and Annotation of Fungal Genomes

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Journal of Computer Science & Technology 2021年第2期36卷 248-260页

作者： jian Liu Jia-Liang sun yong-Zhuang Liu College of Computer Science Nankai UniversityTianjin 300350China School of Computer Science and Technology Harbin Institute of TechnologyHarbin 150001China

In the past few decades,the dangers of mycosis have caused widespread *** the development of the sequencing technology,the effective analysis of fungal sequencing data has become a *** the gradual increase of fungal sequencing data,there is now a lack of sufficient approaches for the identification and functional annotation of fungal chromosomal *** overcome this challenge,this paper firstly deals with the approaches of the identification and annotation of fungal genomes based on short and long reads sequenced by using multiple platforms such as Illumina and *** this paper develops an automated bioinformatics pipeline called PFGI for the identification and annotation *** experimental evaluation on a real-world dataset ENA(European Nucleotide Archive)shows that PFGI provides a user-friendly way to perform fungal identification and annotation based on the sequencing data analysis,and could provide accurate analyzing results,accurate to the species level(97%sequence identity).

关键词： fungal genome fungal identification bioinformatics pipeline

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ELASTIC ANALYSIS OF ORTHOTROPIC PLANE PROBLEMS BY THE SPLINE FICTITIOUS BOUNDARY ELEMENT METHOD

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Applied Mathematics and Mechanics(English Edition) 2002年第4期23卷 446-453页

作者： su Cheng(苏成) HAN Da-jian(韩大建) Department of Civil Engineering South China University of Technology Guangzhou 510640 P R China Department of Civil Engineering South China University of Technology Guangzhou 510640 P R China

Non-singular fictitious boundary integral equations for orthotropic elastic plane problems were deduced according to boundary conditions by the techniques of singular-points-outside-domain. Then the unknown fictitious load functions along the fictitious boundary were expressed in terms of basic spline functions, and the boundary-segment-least-squares method was proposed to eliminate the boundary residues obtained. By the above steps, numerical solutions to the integral equations can be achieved. Numerical examples are given to show the accuracy and efficiency of the proposed method.

关键词： orthotropic plane problem spline function boundary element method

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Storage life prediction under pre-strained thermally-accelerated aging of HTPB coating using the change of crosslinking density

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Defence Technology（防务技术） 2021年第4期17卷 1387-1394页

作者： yong-qiang Du jian Zheng Gui-bo Yu Shijiazhuang Campus Army Engineering UniversityShijiazhuang050003China

In order to predict the storage life of a certain type of HTPB(hydroyl-terminated polybutadiene)coating at 25℃ and analyze the influence of pre-strain on the storage life,the accelerated aging tests of HTPB coating at 40℃,50℃,60℃,70℃ with the pre-strain of 0%,3%,6%,9%,respectively were carried *** variation regularity of the change of crosslinking density was analyzed and the aging model of HTPB coating under pre-strained thermally-accelerated aging was *** storage life of HTPB coating at 25℃ was estimated by using the Berthelot equation as the end point of the aging life with a 30% decrease in maximum *** results showed that the change of crosslinking density of HTPB coating increased with the increase of aging temperature and aging time,and decreased with the increase of *** 0% prestrain,the relationship between the change of crosslinking density of HTPB coating and the aging time can be described by the logarithmic model with the confidence probability greater than 99%.The stress relaxation phenomenon existed under 3%,6%and 9%pre-strained *** aging model considering chemical aging and pre-strain was established with the confidence probability greater than 90%.The storage life of HTPB coating was 15.2935 years at 25C under 0% prestrain,which was reduced by 13.9007%,75.6949% and 89.7859% under 3%,6% and 9% pre-strain,*** existence of pre-strain has a serious impact on the storage life of HTPB coating,therefore,the pre-strain should be avoided as much as possible during the actual storage.

关键词： HTPB coating Crosslinking density Aging model Storage life prediction Berthelot

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Efficient piezocatalytic activation of peroxydisulfate over Bi_(2)Fe_(4)O_(9):thickness-dependent synergy effect between peroxydisulfate activation and piezocatalysis

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Rare Metals 2023年第12期42卷 4005-4014页

作者： Chuang-jian su Chao-Lin Li Wen-Hui Wang School of Civil and Environmental Engineering Harbin Institute of TechnologyShenzhen 518055China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China

Piezocatalytic activation of persulfate(PS) has great application potential in environmental remediation;however,the relationship between piezocatalyst thickness and catalytic activity is not clear,limiting the further improvement of catalytic activity and application of the ***,the Bi_(2)Fe_(4)O_(9)(BFO) piezocatalysts with tunable thickness were prepared through a facile hydrothermal method by tuning the molar ratio of Bi(NO_(3)),5H_(2)O and FeCl_(3)·6H_(2)O for piezocatalytic activation of peroxydisulfate(PDS).The BFO with the smallest thickness exhibits excellent catalytic activity,and the SO_(4)^(·-)and ·OH are the major reactive oxygen species for degrading organic *** XPS investigations and finite element analyses demonstrate that the decreased thickness of BFO not only exposes more Fe^(2+)sites for PDS activation,but also improve the piezoelectric effect to accelerate the regeneration of Fe^(2+),thus enabling an enhanced synergy effect between PDS activation and piezocatalysis for outstanding catalytic *** work provides an understanding of the relationship between thickness of piezocatalysts and its catalytic activity over PDS activation,facilitating the development of more efficient piezocatalysts and PS-based advanced oxidation processes.

关键词： Bi_(2)Fe_(4)O_(9)(BFO)piezocatalyst Active sites Piezocatalytic activation Peroxydisulfate(PDS) Reactive oxygen species Environment remediation

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Design and evaluation of prototype readout electronics for nuclide detector in Very Large Area Space Telescope

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Nuclear Science and Techniques 2022年第5期33卷 154-166页

作者： Hai-Bo Yang Xian-Qin Li Yu-Hong Yu yong Chen Jie Kong yong-Jie Zhang Shu-Wen Tang jian-Hua Guo Bing Yang Feng-Jiao su Wen-jian sun Jin-Xiang Wang Cheng-Xin Zhao Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Harbin Institute of Technology Harbin 150001China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210000China Harbin University of Science and Technology Harbin 150080China Northwest Normal University Harbin 150080China

China plans to develop the next generation dark matter particle explorer satellite,referred to as the Very Large Area Space Telescope(VLAST).As an essential step in this process,the prototype design of detectors and electronics for the VLAST is currently *** nuclide detector is a core detector in the *** mainly measures nuclides’charges and distinguishes high-energy gamma rays and *** paper will discuss the prototype readout electronics for the VLAST’s nuclide detector,which accurately measures the charge signal of the photomultiplier tubes using the VATA160 applicationspecific integrated circuit chip;furthermore,we consider a series of critical problems,including radiation-hardening and environment *** test results show that the system exhibits stable operation,good performance,and good technical ***,each electronic channel achieves a dynamic range of 0-12.5 pC,the random noise level exceeds 1.6 fC,and the integral nonlinearity exceeds 0.35%.

关键词： Dark matter VLAST Nuclidedetector Prototype readout electronics VATA160 Large dynamic range Irradiationtest Performance test

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A complete coalition logic of temporal knowledge for multi-agent systems

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Frontiers of Computer Science 2015年第1期9卷 75-86页

作者： Qingliang CHEN Kaile su yong HU Guiwu HU Department of Computer Science Jinan University Guangzhou 510632 China Institute for Integrated and Intelligent Systems Griffith University Brisbane Qld 4111 Australia 3 Institute of Business Intelligence and Knowledge Discovery Guangdong University of Foreign Studies Guangzhou 510006 China School of Mathematics and Statistics Guangdong University of Finance and Economics Guangzhou 510320 China

Coalition logic （CL） is one of the most influential logical formalisms for strategic abilities of multi-agent systems. CL can specify what a group of agents can achieve through choices of their actions, denoted by [C]φ to state that a group of agents C can have a strategy to bring about φ by collective actions, no matter what the other agents do. However, CL lacks the temporal dimension and thus can not capture the dynamic aspects of a system. Therefore, CL can not formalize the evolvement of rational mental attitudes of the agents such as knowledge, which has been shown to be very useful in specifications and verifications of distributed systems, and has received substantial amount of studies. In this paper, we introduce coalition logic of temporal knowledge （CLTK）, by incorporating a temporal logic of knowledge （Halpern and Vardi＇s logic of CKLn） into CL to equip CL with the power to formalize how agents＇ knowledge （individual or group knowledge） evolves over the time by coalitional forces and the temporal properties of strategic abilities as well. Furthermore, we provide an axiomatic system for CLTK and prove that it is sound and complete, along with the complexity of the satisfiability problem which is shown to be EXPTIME-complete.

关键词： coalition logic temporal logic of knowledge complete axiomatization multi-agent systems

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One-pot degradation of cellulose into carbon dots and organic acids in its homogeneous aqueous solution

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Green Energy & Environment 2019年第4期4卷 391-399页

作者： Hui su Zhihao Bi yong Ni Lifeng Yan CAS Key Laboratory of Soft Matter Chemistry Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemical Physics i CHEMUniversity of Science and Technology of China

As the abundant biopolymer, cellulose can be used as a feedstock for chemicals and materials. Effective conversion of cellulose by simple processes is a key point. Degradation of cellulose in its homogeneous solution is attractive for the molecular chains are free and spread. Here,microcrystalline cellulose was first dissolved in aqueous solution of Na OH and urea, and then hydrothermal reaction was carried out at various temperature and time. Fluorescence carbon dots(CDs) were generated accompanied with six organic acids: oxalic acid, formic acid, malonic acid, lactic acid, acetic acid, and fumaric acid. The yields of all organic acids and CDs, and the fluorescence quantum yield(QY) of CDs were studied at different reaction conditions. It was found that the maximum yield of organic acids and CDs are 80.1% and 6.03%, respectively, and the highest QY of the CDs is 10.9%. Fluorescence studies reveal that the as-prepared CDs has efficient selectivity and sensitivity toward iron ions in acidic condition, indicating it is a potential fluorescent sensor to the detection of Fe3+. Importantly, it provides a panorama to summary the degradation routes of cellulose in its homogeneous aqueous solution with both organic molecules and CDs as products.

关键词： Cellulose Homogeneous aqueous solution Degradation Organic acids Carbon dots (CDs)

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A Leguminous Shrub (Caragana microphylla) in Semiarid Sandy Soils of North China

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Pedosphere 2006年第3期16卷 319-325页

作者： ZHANG Tong-Hui su yong-Zhong CUI jian-Yuan ZHANG Zhi-Hui CHANG Xue-Xiang Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 （China）

Caragana microphylla Lam., a pioneer leguminous shrub species for vegetation re-establishment, is widely distributed in the semi-fixed and fixed sandy lands of the Horqin region. Some soil chemical and physical properties were measured under the canopy of C. microphylla and in the adjacent open areas to determine the effects of individual shrubs on soil properties. The influence of isolated C. microphylla on chemical and physical properties of the topsoil was significantly different between plots under the shrub canopy and in the shrub interspaces. Beneath the shrub canopy greater amounts of fine particle fractions, a higher water-holding capacity, and a lower bulk density, as well as higher aboveground and belowground litter biomass were found. Soil organic C and total N concentrations were 23%-31.6% and 14%-27.2% higher under the shrub canopies than in the shrub interspaces, respectively, giving rise to 'islands of fertility'. In a desertified sandy grassland ecosystem, C. microphylla was believed to play a major role in organic C sequestration, N accumulation, and the hydrologic cycle. Additionally, it has been found to be of ecological importance for vegetative restoration and reversal of desertification.

关键词： Caragana microphylla Lam. degraded sandy grassland soil chemical properties soil physical properties

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Reconstructing and editing fluids using the adaptive multilayer external force guiding model

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Science China(Information Sciences) 2022年第11期65卷 107-122页

作者： Xiaoying NIE yong HU Xukun SHEN Zhiyuan su State Key Laboratory of Virtual Reality Technology and Systems Beihang University School of New Media Art and Design Beihang University

Reconstructing monocular fluids usually involves a tedious trial-and-error process, and editing desired fluid behaviors is notoriously difficult to predict and control. To address these problems, we propose an adaptive multilayer external force guiding model that alleviates the challenging parameter tuning and satisfies user-defined requirements. External forces cause the effect of target particles on fluid *** adaptive multilayer scheme makes the whole 3D fluid volume subject to the shape and motion of the water captured by the input video or designed by users. Therefore, we can avoid the tedious and laborious parameter tuning and easily balance the smoothness of fluid volume and the details of the water ***, to vividly reproduce the inflow and outflow of the video scene, we construct a generation and extinction model to add or delete fluid particles according to the three-dimensional velocity field of target particles calculated using a hybrid model coupling shape-from-shading with optical flow. Besides, we edit fluids by subtly extracting features selected by users using the off-screen rendering method and seamlessly integrating them using the dynamic weight approach. Experiments show that our approach is comparable to the state-of-the-art reconstruction quality and is remarkably convenient in authoring flows by editing ***, our results can be effectively applied to any desired new scenario.

关键词： reconstructing fluids editing fluids monocular videos adaptive multilayer external force guiding model generation and extinction model

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