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Cold Model of Coal Gas Component Concentration Distribution in Blast Furnace Raceway

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Journal of Iron and Steel Research International 2009年第6期16卷 1-6页

作者： ZHANG Sheng-fu WEN Liang-ying BAI Chen-guang QIU Gui-bao HU mei-long lu xue-wei College of Materials Science and Engineering Chongqing University Chongqing 400030 China

Primary distribution of coal gas in blast furnace raceway has an important effect on blast furnace ironmaking process. The coal gas component concentration distribution was studied experimentally using a three-dimensional cold model. The results showed that CH4 concentration diminishes along with the height increasing on vertical section of raceway, and the concentration is the highest in the bottom of raceway. CH4 concentration increases gradually *** raceway depth with the lowest concentration value in front of the tuyere. The distribution of CH4 concentration has different characteristics in different raceway zones.

关键词： blast furnace raceway coal gas component concentration distribution

Synthesis, Crystal Structure and Anion Recognition Property of a Flexible Urea-functionalized Receptor

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Chinese Journal of Structural Chemistry 2019年第5期38卷 737-744,669页

作者： HUANG Chao YI Rui CHEN Dong-mei ZHU Bi-xue lu Ji-Hong College of Chemistry and Chemical Engineering Guizhou University

A flexible urea-functionalized receptor bearing two p-nitrobenzene units was designed and synthesized from the reaction of precursors 4-nitrophenyl isocyanate and 1,2-bis（2?-aminophenoxy） benzene. The receptor was characterized by 1 H NMR, MS, FTIR and elemental analysis, and the crystal structure of the receptor was determined by X-ray diffraction analysis. The crystal belongs to the orthorhombic system, space group Pca21 with a = 12.740（2）, b =14.133（3）, c = 15.842（3） ?, V = 2852.4（9） ?3, Z = 4, Mr = 620.57, Dc = 1.445 g/cm3, F（000） = 1288,= 0.0585 and wR = 0.1032 for 3177 observed reflections（Ⅰ > 2σ（Ⅰ））, and R = 0.1304 and wR =for all data. The results show that the receptor displays selective recognition ability for H2PO4– in DMSO with a series of anions using UV-Vis absorption spectra technique. Furthermore, the coordination reaction of the receptor with H2PO4– was investigated via UV-Vis spectra and 1 H *** stoichiometric ratio and the association constant（Ka） of the coordination reaction were obtained as well.

关键词： urea receptor crystal structure recognition property

A vision of 6G-5G’s successor

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Journal of Management Analytics 2020年第3期7卷 301-320页

作者： Yang lu xue Ning University of Central Oklahoma EdmondOKUSA University of Colorado Denver DenverCOUSA

6G represents the next generation of mobile communication and mobile *** the previous five generations of mobile communication systems(from 1G to 5G),the development of the 6G mobile communication will be a *** a holographic and ubiquitous multidimensional network,6G will present us with the ability to establish full coverage of the“air–space–sea–land”system and to integrate with AI,IoT,and blockchain to form a network *** study addresses and emphasizes the literature that focuses on the technological perspectives of 6G,most specifically,its technological characteristics,key enabling technologies,and potential *** addition,a thorough description of the development of the mobile communication system from 1G to 6G is *** paper plays the important role of introducing a technological view of 6G to practitioners and researchers.

关键词： 6G terahertz tactile internet AI internet of things(IoT) blockchain

Clinical and Pathological Implications of Increases in Tonsillar CD19+CD5+B Cells,CD208+Dendritic Cells,and IgA1-positive Cells of Immunoglobulin A Nephropathy

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Current Medical Science 2022年第1期42卷 93-99页

作者： Yang CAI mei-xue CHEN Yuan-jun DENG Le-le LIU xue-ping LIN Ping-fan lu Yi-yan GUO Min HAN Division of Nephrology Department of Internal MedicineTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Objective:Several studies indicated that tonsillectomy can improve the prognosis of patients with immunoglobulin A nephropathy(IgAN).However,the relationship between tonsillar immunity and IgAN is still ***:A total of 14 IgAN patients were recruited in the current study from May 2015 to April 2016 in Tongji Hospital.B cells,dendritic cells(DCs),and IgAl positive cells in human tonsils were detected using immunofluorescence and *** between these cells and clinicopathologic features were evaluated.

关键词： IgA nephropathy tonsil B cells dendritic cells IgAl-positive cells

Ca(NO3)2 canopy spraying during physiological fruit drop period has a better influence on the tree character and fruit quality of Newhall navel orange(Citrus sinensis Osbeck)

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Journal of Integrative Agriculture 2017年第7期16卷 1513-1519页

作者： ZHENG Yong-qiang YANG Qiong JIA xue-mei LIU Yan-mei HE Shao-lan DENG Lie XIE Rang-jin YI Shi-lai lu Qiang National Engineering Research Center for Citrus Technology/Citrus Research Institute Southwest University-Chinese Academy of Agricultural SciencesChongqing 400712P.R.China Economic Crop Technology Promotion Station Chongqing 400700P.R.China

This study aimed to provide a theoretical basis for adopting suitable cultivation measures to tackle calcium （Ca） deficiency in citrus leaves. The Newhall navel orange （Citrus sinensis Osbeck） canopy was sprayed with 20.0 mmol L-1 of Ca（NO3）2 during physiological fruit drop period, fruit expanding period, and fruit maturing period on 30, 90, and 210 days after full bloom （DAFB）, respectively, and its effects on leaf gas exchange parameters and leaf mineral nutrition and fruit quality were analyzed. The results showed that：（1） The photosynthetic rate （ACO2） at 9：00 a.m. and 16：00 p.m. of fruit expanding period with 30 and 90 DAFB Ca（NO3）2treatments slightly or significantly improved mainly by decreasing stomatal limitation and nonstomatal limitation, respectively. （2） Compared with control （CK）, the Ca concentration in leaves with 30, 90, and 240 DAFB Ca（NO3）2 treatments increased by 127.16; 97.53, and 33.33%, respectively, and the leaf magnesium concentra- tion also increased by more than 32.26%. However, Ca（NO3）2 canopy spraying on 30 DAFB significantly reduced the leaf potassium concentration, by 22.14% compared with CK. （3） Ca（NO3）2 canopy spraying on 30 DAFB decreased the second fruit drop rate by 30.55% and increased the weight per fruit by 25.04%, thus resulting in a significant increase in citrus yield. （4） Spraying Ca（NO3） on 30 DAFB mainly affected the metabolism of titratable acid （TA） to improve the maturity of citrus fruits. Whilst it improved the external quality and the coloring of citrus fruit significantly. Therefore, Ca（NO3）2 canopy spraying during physiological fruit drop period has a better influence on the tree character and fruit quality of Newhall navel orange （Citrus sinensis Osbeck）.

关键词： Ca(NO3)2 canopy spraying fruit quality high temperature Newhall navel orange

An MPI+OpenACC-Based PRM Scalar Advection Scheme in the GRAPES Model over a Cluster with Multiple CPUs and GPUs

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Tsinghua Science and Technology 2022年第1期27卷 164-173页

作者： Huadong Xiao Yang lu Jianqiang Huang Wei xue the Institute of Geodesy and Geophysics Chinese Academy of SciencesWuhan 430074China the University of Chinese Academy of Sciences Beijing 100049China the National Meteorological Information Center Beijing 100081China the Department of Computer Science and Technology Tsinghua UniversityBeijing 100084China the Department of Computer Technology and Application Qinghai UniversityXining 810016China

A moisture advection scheme is an essential module of a numerical weather/climate model representing the horizontal transport of water *** Piecewise Rational Method(PRM) scalar advection scheme in the Global/Regional Assimilation and Prediction System(GRAPES) solves the moisture flux advection equation based on *** of the scalar advection involves boundary exchange,and computation of higher bandwidth requirements is complicated and time-consuming in ***,Graphics Processing Units(GPUs) have been widely used to solve scientific and engineering computing problems owing to advancements in GPU hardware and related programming models such as CUDA/OpenCL and Open Accelerator(OpenACC).Herein,we present an accelerated PRM scalar advection scheme with Message Passing Interface(MPI) and OpenACC to fully exploit GPUs’ power over a cluster with multiple Central Processing Units(CPUs) and GPUs,together with optimization of various parameters such as minimizing data transfer,memory coalescing,exposing more parallelism,and overlapping computation with data *** show that about 3.5 times speedup is obtained for the entire model running at medium resolution with double precision when comparing the scheme’s elapsed time on a node with two GPUs(NVIDIA P100) and two 16-core CPUs(Intel Gold 6142).Further,results obtained from experiments of a higher resolution model with multiple GPUs show excellent scalability.

关键词： Graphics Processing Unit(GPU)computing Open Accelerator(OpenACC) Message Passing Interface(MPI) Global/Regional Assimilation and Prediction System(GRAPES) Piecewise Rational Method(PRM)scalar advection scheme

The energy performance and passive survivability of high thermal insulation buildings in future climate scenarios

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Building Simulation 2022年第7期15卷 1209-1225页

作者： Ran Wang Shilei lu xue Zhai Wei Feng School of Environment Science and Engineering Tianjin University92 Weijin RoadTianjin300072China Tianjin Key Laboratory of Built Environment and Energy Application Tianjin UniversityTianjin300350China Lawrence Berkeley National Laboratory BerkeleyCA 94720USA

Given that the passive performance simulation of buildings based on typical meteorological year data and specific design schemes makes it challenging to respond to climate change and refine design requirements on time,this article established a passive performance prediction model for future buildings considering multi-dimensional variables including climate change,building design,and operational *** high thermal insulation buildings under future climates,the mild climate zone is more sensitive than the others,cooling energy demand is more sensitive than heating demand,apartments are more sensitive than office buildings,and passive survivability is more sensitive than energy performance;for buildings of the same type located in the same climate zone,thermal design solutions determine the increase rate of cooling *** potential benefits of climate warming on heating demand reduction are almost zero,but the cooling demand increases significantly,with apartments and office buildings increasing up to 22.1% and 5.0%,*** generally overheat in the future,and the increase rate of the mild zone far exceeds other zones with duration and severity being 3004.8% and 877.7%for apartments,and 884.3% and 288.9%for office buildings,respectively.

关键词： climate change overheating risk cooling demand heating demand scenarios thermal insulation

Revealing Spatial Spillover Effect in High-Tech Industry Agglomeration from a High-Skilled Labor Flow Network Perspective

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Journal of Systems Science & Complexity 2022年第3期35卷 839-859页

作者： WANG Chen WANG lu xue Yanbo LI Ruiqi School of Economics and Management University of Science and Technology BeijingBeijing 100083China The Institute of Low Carbon Operations Strategy for Beijing Enterprises University of Science and Technology BeijingBeijing 100083China Career Science Lab Boss ZhipinBeijing 100028China UrbanNet Lab College of Information Science and TechnologyBeijing University of Chemical TechnologyBeijing 100029China

Understanding the high-tech industrial agglomeration from a spatial-spillover perspective is essential for cities to gain economic and technological competitive *** with rapid urbanization and the development of fast transportation networks,socioeconomic interactions between cities have been ever-increasing,traditional spatial metrics are not enough to describe actual inter-city ***-skilled labor flow between cities strongly influences the high-tech industrial agglomeration,yet receives less *** exploiting unique large-scale datasets and tools from complex network and data mining,the authors construct an inter-city high-skilled labor flow network,which was integrated into spatial econometric *** regression results indicate that spatial-spillover effects exist in the development of high-tech industries in the Yangtze River Delta Urban Agglomeration ***,the spatial-spillover effects are stronger among cities with a higher volume of high-skilled labor flows than among cities with just stronger geographic ***,the authors investigate the channels for the spillover effects and discover that inadequate local government expenses on science and technology likely hamper the high-tech industrial agglomeration,so does the inadequate local educational *** increasing foreign direct investments in one city likely encourages the high-tech industrial agglomeration in other cities because of the policy inertia toward traditional industries.

关键词： High-tech industry agglomeration labor flow network spatial econometrics topological space

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Distributed H∞ filtering of nonlinear systems with random topology by an event-triggered protocol

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Science China(Information Sciences) 2021年第10期64卷 206-220页

作者： Yun CHEN Mengze ZHU Renquan lu Anke xue Key Lab for IoT and Information Fusion Technology of Zhejiang Hangzhou Dianzi University School of Automation Guangdong University of Technology

Applying an event-triggered protocol, this paper proposes a distributed Hfilter design for nonlinear perturbed systems under fading measurements with random topology. Nonlinearities in this system obey the one-sided Lipschitz constraint, which embraces the conventional Lipschitz condition as a special *** sensor network allows random variations of the interconnection strengths between adjacent nodes, and the connection coefficient is determined as the product of a constant and a stochastic variable with a known probabilistic feature. To reduce the unnecessary data transmission and efficiently use the limited bandwidth,the transmissions are orchestrated by an event-triggered regulating strategy. A stochastic bounded real lemma is established for the resulting error dynamics. Based on the presented matrix decomposition, which removes the direct coupling between the statistical information of interconnection strengths and the filter gain, the distributed Hfilter gain can be explicitly expressed and easily solved. The usefulness of the theoretical method is demonstrated in a simulation study.

关键词： sensor network distributed $H_\infty$ filtering one-sided Lipschitz condition event-triggered protocol random topology