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Turbulent mechanisms in open channel sediment-laden flows

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International Journal of Sediment Research 2019年第6期34卷 550-563页

作者： Hai huang hongwu Zhang Deyu Zhong Yinglong J.Zhang State Key Laboratory of Hydroscience and Engineering Tsinghua Univ. State Key Laboratory of Plateau Ecology and Agriculture Qinghai University Virginia Institute of Marine Science College of William & MaryCenter for Coastal Resource Management

The effects of turbulence on water-sediment mixtures is a critical issue in studying sediment-laden *** sediment concentrations and particle inertia play a significant role in the effects of turbulence on mixtures.A two-phase mixture turbulence model was applied to investigate the turbulence mechanisms affecting sediment-laden *** two-phase mixture turbulence model takes into account the complicated mechanisms arising from interphase transfer of turbulent kinetic energy,particle collisions,and *** turbulence in sediment-laden flows is the result of the interaction of four factors,*** production,dissipation,diffusion,and inter-phase transfer of turbulent kinetic energy of *** turbulence production and dissipation are two dominant processes which balance the turbulent kinetic energy of *** turbulence production represents turbulence intensity,while the inter-phase transfer of turbulent kinetic energy denotes the effect of particles on the turbulence of sediment-laden ***,the magnitude of the inter-phase interaction term is much less than that of the turbulence production and dissipation terms,due to an approximate local balance between production and dissipation of the turbulent kinetic energy,even the small order of the inter-phase interaction has a significant impact on the turbulent balance of sediment-laden *** presence of particles plays a duel role in the turbulence dissipation of mixtures:both promotion and *** important parameter used to determine the turbulent viscosity of mixtures,which is constant in clear water,is the function of the sediment concentration and particle inertia in sediment-laden flows.

关键词： Turbulence modulation Two-phase mixture turbulence model Suspended sediment Open channels

A novel nest-based scheduling method for mobile wireless body area networks

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Digital Communications and Networks 2020年第4期6卷 514-523页

作者： Zhijun Xie Guangyan huang Roozbeh Zarei Zhenyan Ji hongwu Ye Jing He Department of Information Science and Engineering Ningbo UniversityNingboChina School of Information Technology Deakin UniversityMelbourneAustralia Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingboChina School of Software Engineering Beijing Jiaotong UniversityBeijingChina Zhejiang Fashion Institute of Technology NingboChina Institute of Information Technology Nanjing University of Finance and EconomicsJiangsuNanjingChina Swinburne Data Science Research Institute Swinburne University of TechnologyMelbourneAustralia

Wireless Body Area Networks(WBANs)comprise various sensors to monitor and collect various vital signals,such as blood pressure,pulse,heartbeat,body temperature,and blood sugar.A dense and mobile WBAN often suffers from interference,which causes serious problems,such as wasting energy and degrading *** reality,not all of the sensors in WBAN need to be active at the same ***,they can be divided into different groups so that each group works in turn to avoid *** this paper,a Nest-Based WBAN Scheduling(NBWS)algorithm is proposed to cluster sensors of the same types in a single or multiple WBANs into different groups to avoid ***,we borrow the graph coloring theory to schedule all groups to work using a Time Division for Multimodal Sensor(TDMS)group scheduling *** theoretical analysis and experimental results demonstrate that the proposed NBWS algorithm performs better in terms of frequency of collisions,transmission delay,system throughput,and energy consumption compared to the counterpart methods.

关键词： Interference elimination Nest Sensors Scheduling Wireless body area networks Graph coloring theory

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基于DOE的儿童乘员约束系统约束路径优化

汽车安全与节能学报 2015年第3期6卷 230-236页

作者：韩勇谢金萍卢晓萍王方黄红武水野幸治厦门理工学院机械与汽车工程学院名古屋大学机械与情报工程研究科

为优化安全带固定式儿童乘员约束系统(CRS)安全带设计,用"试验设计方法(DOE)",优化约束路径参数。用CRS有限元模型,建立Hybrid III 3岁儿童假人正面碰撞仿真模型,用台车试验结果进行了验证。改进了CRS骨架结构,用正交试验设计,研究安全... 详细信息

为优化安全带固定式儿童乘员约束系统(CRS)安全带设计,用"试验设计方法(DOE)",优化约束路径参数。用CRS有限元模型,建立Hybrid III 3岁儿童假人正面碰撞仿真模型,用台车试验结果进行了验证。改进了CRS骨架结构,用正交试验设计,研究安全带导向环固定位置、骨架座椅厚度及儿童乘员与五点式安全带之间的摩擦因数等因素,对头部伤害指标(HIC15)值、胸部合成加速度、胸部垂直加速度等损伤参数的影响。结果表明:头部前倾位移量,从高于法规限值(550 mm)的1.5%,降到低于限值的15%。安全带导向环固定位置是最为敏感的因素;因此,优化导向环固定位置及降低摩擦因数,可减少头部最大位移量。

关键词：汽车安全儿童乘员损伤儿童乘员约束系统(CRS) 安全带正交试验有限元方法

Silica shell-assisted synthetic route for mono-disperse persistent nanophosphors with enhanced in vivo recharged near-infrared persistent luminescence

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Nano Research 2017年第6期10卷 2070-2082页

作者： Rui Zou Junjian huang Junpeng Shi Lin huang Xuejie Zhang Ka-Leung Wong hongwu Zhang Dayong Jin Jing Wang Qiang Su Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and Technologies KL GHEI of Environment and Energy Chemistry School of Chemistry Sun Yat-Sen University Guangzhou 510275 China Key Lab of Urban Pollutant Conversion Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China Department of Chemistry Hong Kong Baptist University Hong Kong 999077 China Institute for Biomedical Materials and Devices (IBMD) Faculty of Science University of Technology Sydney NSW 2007 Australia

Near-infrared （NIR） persistent-luminescence nanoparticles have emerged as a new class of background-free contrast agents that are promising for in vivo imaging. The next key roadblock is to establish a robust and controllable method for synthesizing monodisperse nanoparticles with high luminescence brightness and long persistent duration. Herein, we report a synthesis strategy involving the coating/etching of the SiO2 shell to obtain a new class of small NIR highly persistent luminescent ZnGa2O4：Cr^3＋,Sn^4＋（ZGOCS） nanoparticles. The optimized ZGOCS nanoparticles have an excellent size distribution of -15 nm without any agglomeration and an NIR persistent luminescence that is enhanced by a factor of 13.5, owing to the key role of the SiO2 shell in preventing nanoparticle agglomeration after annealing. The ZGOCS nanoparticles have a signal-to-noise ratio -3 times higher than that of previously reported ZnGa204：Cr^3＋（ZGC-1） nanoparticles as an NIR persistent-luminescence probe for in vivo bioimaging. Moreover, the persistent-luminescence signal from the ZGOCS nanoparticles can be repeatedly re-charged in situ with external excitation by a white light- emitting diode; thus, the nanopartides are suitable for long-term in vivo imaging applications. Our study suggests an improved strategy for fabricating novel high-performance optical nanoparticles with good biocompatibility.

关键词： core-shell structure in vivo imaging narrow size distribution near-infrared (NIR)persistent luminescence biocompatibility

在ECE R129实验条件下Q3和THUMS 3YO有限元模型的响应差异分析

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汽车安全与节能学报 2016年第3期7卷 291-298页

作者：韩勇卢晓萍谢金萍王方黄红武水野幸治厦门理工学院机械与汽车工程学院第三军医大学交通医学研究所江铃汽车股份有限公司名古屋大学机械与情报工程研究科

研究3岁儿童乘员模型的差异性对儿童安全约束系统(CRS)防护性能评价的影响,基于ECE R129法规正面台车碰撞试验方法,采用Q3儿童假人和THUMS 3YO儿童人体有限元模型,建立不同类型的儿童约束系统(CRS)约束的正面碰撞台车试验仿真模型。对... 详细信息

研究3岁儿童乘员模型的差异性对儿童安全约束系统(CRS)防护性能评价的影响,基于ECE R129法规正面台车碰撞试验方法,采用Q3儿童假人和THUMS 3YO儿童人体有限元模型,建立不同类型的儿童约束系统(CRS)约束的正面碰撞台车试验仿真模型。对比分析了Q3和THUMS3YO有限元模型的运动学响应以及头部、颈部和胸部损伤物理参数。结果表明:在前护板式CRS中,Q3绕前护板向上翻转运动,THUMS 3YO整体呈下潜运动。在相同CRS约束条件下,THUMS 3YO模型在颈部弯曲角度、胸部压缩量和胸部合成加速度均大于Q3。结果表明:相比于Q3模型,THUMS 3YO的颈部与胸部更具有柔韧性,生物逼真度更高。本研究可为儿童假人的发展提供依据。

关键词：乘用车儿童约束系统 THUMS 3YO人体有限元模型 Q3儿童假人有限元模型 ECE R129法规

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基于法布里-珀罗共振的红外探测器性能分析

山西大同大学学报（自然科学版） 2024年第4期40卷 9-12页

作者：黄磊杨春花刘红梅胡洪武山西大同大学煤炭工程学院山西大同037003 山西大同大学物理与电子科学学院山西大同037009

红外探测器吸收性能的相关研究一直是备受关注的研究领域,吸收率仍存在进一步提升的潜力。设计了金属-半导体-金属(MSM)型量子阱红外探测器结构,并在仿真软件中模拟计算了其吸收率。结果表明,该结构可以在特定频率下发生法布里-珀罗共振... 详细信息

红外探测器吸收性能的相关研究一直是备受关注的研究领域,吸收率仍存在进一步提升的潜力。设计了金属-半导体-金属(MSM)型量子阱红外探测器结构,并在仿真软件中模拟计算了其吸收率。结果表明,该结构可以在特定频率下发生法布里-珀罗共振(FP共振)且明显增强了吸收。此外,量子阱的层数和入射角度等因素会对FP共振频率产生影响,且在量子阱层数为7层、入射角在0°~15°之间时,所设计的MSM型量子阱红外探测器表现出最佳的吸收性能。

关键词： FP共振 MSM结构红外探测器斜入射

Improving pathway prediction accuracy of constraints-based metabolic network models by treating enzymes as microcompartments

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Synthetic and Systems Biotechnology 2023年第4期8卷 597-605页

作者： Xue Yang Zhitao Mao Jianfeng huang Ruoyu Wang Huaming Dong Yanfei Zhang hongwu Ma Tianjin Institute of Industrial Biotechnology Chinese Academy of SciencesTianjin300308China National Technology Innovation Center of Synthetic Biology Tianjin300308China School of Environmental Ecology and Biological Engineering Wuhan Institute of TechnologyWuhan430205China

Metabolic network models have become increasingly precise and accurate as the most widespread and practical digital representations of living *** prediction functions were significantly expanded by integrating cellular resources and abiotic constraints in recent ***,if unreasonable modeling methods were adopted due to a lack of consideration of biological knowledge,the conflicts between stoichiometric and other constraints,such as thermodynamic feasibility and enzyme resource availability,would lead to distorted *** this work,we investigated a prediction anomaly of EcoETM,a constraints-based metabolic network model,and introduced the idea of enzyme compartmentalization into the analysis *** rational combination of reactions,we avoid the false prediction of pathway feasibility caused by the unrealistic assumption of free intermediate *** allowed us to correct the pathway structures of L-serine and L-tryptophan.A specific analysis explains the application method of the EcoETM-like model and demonstrates its potential and value in correcting the prediction results in pathway structure by resolving the conflict between different constraints and incorporating the evolved roles of enzymes as reaction ***,this work also reveals the trade-off between product yield and thermodynamic *** work is of great value for the structural improvement of constraints-based models.

关键词： Genome-scale metabolic network models (GEMs) Enzymatic and thermodynamic constraints Thermodynamic driving force(MDF) Compartmentalization Multifunctional enzymes Enzyme complexes

Genetic analysis and QTL mapping of stalk cell wall components and digestibility in maize recombinant inbred lines from B73 × By804

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The Crop Journal 2020年第1期8卷 132-139页

作者： Qi Wang Kun Li Xiaojiao Hu Huimin Shi Zhifang Liu Yujin Wu hongwu Wang Changling huang National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijingChina National Engineering Laboratory for Crop Molecular Breeding BeijingChina

The cell wall composition and structure of the maize stalk directly affects its digestibility and in turn its feed *** studies of stem quality have focused mostly on common maize germplasm,and few studies have focused on high-oil cultivars with high grain and straw *** of the genetic basis of cell wall composition and digestibility of maize stalk using high-oil maize is desirable for improving maize forage *** the present study,a high-oil inbred line(By804)was crossed as male parent with the maize inbred line B73 to construct a population of 188 recombinant inbred lines(RILs).The phenotypes of six cell-wall-related traits were recorded,and QTL analysis was performed with a genetic map constructed with SNP *** traits were significantly correlated with one another and showed high broad-sense *** 20 QTLs mapped,the QTL associated with each trait explained 10.0%–41.1%of phenotypic *** half of the QTL each explained over 10%of the phenotypic *** results provide a theoretical basis for improving maize forage quality by marker-assisted selection.

关键词： Maize QTL Cell wall Digestibility Recombinant inbred lines

Genome-wide alternative splicing variation and its potential contribution to maize immature-ear heterosis

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The Crop Journal 2021年第2期9卷 476-486页

作者： Xiaojiao Hu hongwu Wang Kun Li Xiaogang Liu Zhifang Liu Yujin Wu Shuqiang Li Changling huang National Engineer Laboratory of Crop Molecular Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

Heterosis is a well-known phenomenon widely applied in *** studies have suggested that differential gene and protein expression between hybrids and their parents play important roles in *** splicing(AS)is an essential posttranscriptional mechanism that can greatly affect the transcriptome and proteome diversity in ***,genome-wide AS divergence in hybrids compared to their parents and its potential contribution to heterosis have not been comprehensively *** report the direct profiling of the AS landscape using RNA sequencing data from immature ears of the maize hybrid ZD808 and its parents NG5 and *** results revealed a large number of significant differential AS(DAS)events in ZD808 relative to its parents,which can be further classified into parental-dominant and novel DAS ***-dominant,especially NG5-dominant,events were prevalent in the hybrid,accounting for 42%of all analyzed DAS *** enrichment analysis revealed that the NG5-dominant AS events were involved mainly in regulating the expression of genes associated with carbon/nitrogen metabolism and cell division processes and contributed greatly to maize ear *** ZD808,CL11,and NG5,32.5%of DAS contained or lacked binding sites of at least one annotated maize microRNA(miRNA)and may be involved in miRNA-mediated posttranscriptional *** regulation was the predominant contributor to AS variation and participates in many important biological processes associated with immature ear *** study provides a comprehensive view of genome-wide alternative splicing variation in a maize hybrid.

关键词： Maize Heterosis Dominant alternative splicing Cis-regulation