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Mesh-connected rings topology for network-on-chip

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The Journal of China Universities of Posts and Telecommunications 2013年第5期20卷 30-36页

作者： LIU You-yao gao meng School of Electronic Engineering Xi'an University of Posts & Telecommunications

With the feature size of semiconductor technology reducing and intellectual property （IP） cores increasing, on-chip interconnection network architectures have a great influence on the performance and area of system-on-chip （SoC） design. Focusing on trade-off performance, cost and implementation, a regular network-on-chip （NoC） architecture which is mesh-connected rings （MCR） interconnection network is proposed. The topology of MCR is simple, planar and scalable in architecture, which combines mesh with ring. A detailed theoretical analysis for MCR and mesh is given, and a simulation analysis based on the virtual channel router with wormhole switching is also presented. The results compared with the general mesh architecture show that MCR has better performance, especially in local traffics and low loads, and lower cost.

关键词： SOC NOC network topology routing algorithms performance evaluation

Landscape changes and their ecological eff ects of Miaodao Archipelago with human disturbances and under natural conditions in the past 30 years

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Journal of Oceanology and Limnology 2021年第3期39卷 955-978页

作者： Honghua SHI Liting YIN meng gao The First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China Laboratory for Marine Geology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266061China Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

The modern landscape patterns of islands usually show obvious spatial heterogeneity and complex ecological effects due to the vulnerability of ecosystems with natural characteristics under increasing human *** this work,we studied the variation in landscape pattern of the Miaodao Archipelago in Bohai Sea,North China,from 1990 to 2019,and an evaluation index system was established to explore the impacts of natural conditions and human disturbances on the ecological effects in the pressure-state-response(PSR)*** analysis was conducted on the natural conditions,human disturbances,and ecological *** results show that forest was the main component of the landscape pattern in the *** of the areas offorest and construction land were increasing,and the areas of cropland and grassland were *** landscape types changed slightly,and the landscape fragmentation was *** natural condition exhibited positive effects while human disturbance showed negative effects on the local *** disturbances come mainly from shoreline use while the natural conditions were mainly from the elevation *** ecological effects were resulted mainly from the net primary productivity and water yield.

关键词： Miaodao Archipelago landscape pattern ecological effect structural equation modeling

Effects of CFB Ash on the Adsorption Mechanism of Polycarboxylate Superplasticiser

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Journal of Wuhan University of Technology(Materials Science) 2018年第6期33卷 1323-1333页

作者： LIU Juanhong gao meng SONG Shaomin School of Civil and Resource Engineering University of Science and Technology Beijing Beijing Key Laboratory of Urban Underground Space Engineering College of Civil Engineering and Architecture Henan University of Technology School of Civil and Transportation Engineering Beijing University of Civil Engineering and Architecture

The effects of circulating fluid bed(CFB) ash on the adsorption performance of polycarboxylate superplasticiser and the mechanism of this influence on the dispersive property of the polycarboxylate superplasticiser were investigated by determing the cement paste fluidity, total organic carbon adsorption, infrared spectroscopic analyses and ζ potential test. The experimental results show that the addition of an inorganic salt into the mixture to change the content of SO42-and Fe2O3can improve the adaptability between the CFB ash and polycarboxylate superplasticiser. Adsorption may occur between the polycarboxylate superplasiciser and Fe2O3, SO42-or other components in CFB ash, leading to a significant reduction in paste fluidity. As the content of Na2SO4in CFB ash reaches 3% or Fe2O3reaches 9%, the paste loses its liquidity. The organic carbon content in the liquor decreases with an increase in Na2SO4or Fe2O3content. Adding some Ba(NO3)2and Na2S to the liquor can recover the organic carbon content to a certain extent, and the absolute value of ζ potential will increase. The addition of Ba(-NO3)2or Na2S reduces the adsorption property of Na2SO4or Fe2O3in CFB ash on the polycarboxylate superplasticiser.

关键词： CFB ash polycarboxylate superplasticiser fluidity TOC adsorption

Varieties of Involution J-Trivial Monoids with Continuum Many Subvarieties

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Algebra Colloquium 2024年第3期31卷 467-480页

作者： meng gao Wenting Zhang Yanfeng Luo School of Mathematics and Statistics Lanzhou UniversityLanzhou 730000China

In this paper,we give a suficient condition under which an involution monoid generates a variety with continuum many *** to this result,several involution J-trivial monoids are shown to generate varieties with continuum many *** examples include Rees quotients of free involution monoids,Lee monoids with involution,and Straubing monoids with involution.

关键词： monoid involution monoid variety subvariety lattice of varieties

Double Wronskian Solutions for a Generalized Nonautonomous Nonlinear Equation in a Nonlinear Inhomogeneous Fiber

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Communications in Theoretical Physics 2018年第9期69卷 249-254页

作者： Xi-Yang Xie gao-Qing meng Department of Mathematics and Physics North China Electric Power UniversityBaoding 071003China

A generalized nonautonomous nonlinear equation, which describes the ultrashort optical pulse propagating in a nonlinear inhomogeneous fiber, is investigated. N-soliton solutions for such an equation are constructed and verified with the Wronskian technique. Collisions among the three solitons are discussed and illustrated, and effects of the coefficientsσ1(x, t),σ2(x, t),σ3(x, t) and v(x, t) on the collisions are graphically analyzed, whereσ1(x, t),σ2(x, t),σ3(x, t) and v(x, t) are the first-, second-, third-order dispersion parameters and an inhomogeneous parameter related to the phase modulation and gain(loss), respectively. The head-on collisions among the three solitons are observed, where the collisions are elastc. Whenσ1(x, t) is chosen as the function of x, amplitudes of the solitons do not alter, but the speed of one of the solitons changes.σ2(x, t) is found to affect the amplitudes and speeds of the two of the solitons. It reveals that the collision features of the solitons alter withσ3(x, t)=-1.8x. Additionally, traveling directions of the three solitons are observed to be parallel when we change the value of v(x, t).

关键词： inhomogeneous fiber generalized nonautonomous nonlinear equation bright N-soliton solution double-Wronskian solution

Real-time geochemistry of urban aerosol during a heavy dust episode by single-particle aerosol mass spectrometer: Spatio-temporal variability, mixing state and spectral distribution

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Particuology 2020年第6期18卷 197-207页

作者： Lijuan Shen Feng Hao meng gao Honglei Wang Bin Zhu Jimei gao Yufei Cheng Fei Xie Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological AdministrationNanjing University of Information Science&TechnologyNanjing 210044China Environmental Monitoring Centre of Inner Mongolia Autonomous Region Hohhot 010090China Department of Geography Hong Kong Baptist UniversityHong KongChina State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

A heavy dust episode occurred from May 3 to 8,2017 in China,with an influenced area exceeding 1.63 million *** this work,the mixing state of aerosols and their spectral distributions were simultaneously observed in the sand source region ofHohhot and the long-range dust transport regi on of Nanji ng by using a single-particle aerosol mass spectrometer(SPAMS).The duration time of this dust episode was 37-40 h in Hohhot and prolonged to 51-104 h in *** of 336,135(Hohhot)and 235,840(Nanjing)particles in PM2.5 were successfully ionized to identify 10 main particle *** this episode,aerosol particles including OCEC(30.65%),K(22.42%),K-CN(17.03%),sodium(9.46%),heavy metal(8.96%),EC-sulfate(3.46%)and Al(3.22%)were prevailing in Hohhot and were dominated by EC-sulfate(22.26%),OCEC(15.21%),heavy metal(11.96%),K(13.68%),sodium(12.27%),Al(10.54%)and EC(9.02%)in *** spectral distribution peaked at 0.66μm during the dust episode in Nanjing,0.12μm larger than the peak size in the non-dust *** signals at-62[NO3)and-61[HCO3]/-61[C5H]for aerosol particles were observed in Hohhot and Nanjing *** proportions of K-CN,sodium,heavy mental,OCEC and EC-sulfate particles in the dust episode of Hohhot were 2.75,1.41,1.80,1.22 and 1.28 times as large as the values in the non-dust *** Nanjing,the fractions of EC-sulfate,EC,Al particles in the dust episode were 10.55,4.65 and 1.46 times higher than values in the non-dust *** proportions of EC-secondary and EC-nitate particles were found to decrease in the dust episode in the two regions.

关键词： Dust storm Mixing state Spectral distribution Aerosol SPAMS

Observations of marine snow and fecal pellets in a sediment trap mooring in the northern South China Sea

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Acta Oceanologica Sinica 2020年第3期39卷 141-147页

作者： meng gao Baoqi Huang Zhifei Liu Yulong Zhao Yanwei Zhang School of Earth and Space Sciences Peking UniversityBeijing 100871China State Key Laboratory of Marine Geology Tongji UniversityShanghai 200092China

Sediment traps are an important tool for studying the source, composition and sedimentation processes of sinking particulate matter in the ocean. An in situ observational mooring(TJ-A-1) is located in the northern South China Sea(20.05°N, 117.42°E) at a water depth of 2 100 m and equipped with two sediment traps deployed at 500 m and 1 950 m. Samples were collected at 18-day intervals, and 20 samples were obtained at both depths from May 2014 to May 2015. Large amounts of fecal matter and marine snow were collected in the lower trap. The fluxes of marine snow and fecal pellets exhibited a fluctuating decrease between May 2014 and early August 2014 and then stabilized at a relatively low level. Scanning electron microscopy observations revealed that the main components of the marine snow and fecal pellets were diatoms, coccolithophores, radiolarians, and other debris, all of which are planktons mostly produced in photic zone. Used in conjunction with the particle collection range estimates from the lower trap and data on ocean surface chlorophyll, these marine snow and fecal pellets were related to the lateral transport of deep water and not vertical migrations from overlying water column. Moreover, the source area might be southwest of Taiwan.

关键词： northern South China Sea sediment trap marine snow fecal pellets

First-principles study on the mechanical,thermal properties and hydrogen behavior of ternary V-Ni-M alloys

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Journal of Materials Science & Technology 2021年第11期70卷 83-90页

作者： Yanli Lu Yi Wang Yifan Wang meng gao Yao Chen Zheng Chen State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China

Studying hydrogen behavior in alloys and the mechanical properties of alloys are essential to various practical uses,such as separation membranes,as well as hydrogen embrittlement *** order to further develop the non-Pd-alloy membranes used in hydrogen separation,the mechanical,thermal properties of V_(14)NiM(M=Al,Fe,Si,Ti,Zn)and hydrogen solubility and diffusion behaviors of V-based ternary alloys were studied by first principles *** results indicated that the hydrogen solution energies of V-Ni-M are greater than pure *** the mono-vacancy in pure vanadium can capture 6 H atoms while the V-Ni-M alloys can only capture 5 H ***,the V-Ni-M alloys exhibit lower solubility of hydrogen and higher brittleness resistance to embrittlement compared with pure *** the diffusion coefficients of V-Ni-M alloys are smaller than that of pure vanadium thanks to smaller hydrogen *** hydrogen solubility and hydrogen permeability can maintain relatively *** study of mechanical properties suggests that the V-Ni-Ti has the best resistance to deformation and pure vanadium has the best ***,V-Ni-Si alloy has the smallest thermal expansion coefficient in the temperature range of 473-723 K,which is the temperature of hydrogen separation,indicating that V-Ni-Si is the best for hydrogen separation according to thermal properties.

关键词： Vanadium-based alloys Hydrogen Mechanical properties Diffusion First-principles

Nationwide distribution of polycyclic aromatic hydrocarbons in soil of China and the association with bacterial community

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Journal of Environmental Sciences 2023年第6期128卷 1-11页

作者： Qiuyue Zhang meng gao Xinhui Sun Yu Wang Chaolei Yuan Hongwen Sun MOE Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and EngineeringNankai UniversityTianjin 300350China School of Agriculture Sun Yat-sen UniversityShenzhen 518107China

Soil contamination by polycyclic aromatic hydrocarbons(PAHs)has raised great environmental ***,the information on national wide distribution of PAHs in soil as well as their effect on soil bacterial community are *** this study,16 PAHs weremeasured in 94 soil samples collected across *** total concentration of 16 PAHs(PAHs)in soil ranged from 74.0 to 17,657 ng/g(dry weight basis),with a median value of 200 ng/*** was themajor soil PAH,with amedian concentration of 71.3 ng/*** samples from Northeast China had a higher median concentration ofPAHs(1,961 ng/g)than those from other *** emission and wood/grass/coal combustion were potential sources for soil PAHs based on diagnostic ratios and positive matrix factors analysis.A nonnegligible ecological risk(hazard quotients>1)was found in over 20%of soil samples analyzed and the highestmedian total HQs value(8.53)was found in soils from Northeast *** effect of PAHs on bacterial abundance,α-diversity,andβ-diversity was limited in the soils ***,the relative abundance of some members in genera Gaiella,Nocardioides,and Clostridium was significantly correlated with the concentrations of some ***,the bacterium Gaiella Occulta showed potential in indicating soil contamination by PAH,which is worth further exploration.

关键词： PAHs Soil Source analysis Bacterial community