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Gas-Solid Flow,Combustion Characteristics,and Gas Emissions in a 75 t/h CFB Boiler Based on the CPFD Method

Journal of Thermal Science 2025年第1期34卷 323-336页

作者： HUANG Xiankun BAI Zhang ZHU Xiaoli WANG Shuoshuo MU lin GONG Liang College of New Energy China University of Petroleum (East China) Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education School of Energy and Power EngineeringDalian University of Technology

A 3D simulation using Computational Particle Fluid Dynamics（CPFD） methods was used to calculate coal combustion in a 75 t/h industrial-scale circulating fluidized bed（CFB） *** characteristics,gas-solid flow characteristics,and gaseous pollutant emissions of CFB boilers from combustion ignition to stable operation were systematically evaluated in this *** show that the temperature distribution is relatively uniform throughout the *** the combustion process unfolds within the boiler,the gas composition curve strikingly portrays the inverse correlation between CO2and *** the combustion reaction progresses,it becomes evident that the concentration of CO2progressively increases,while the concentration of O2concurrently *** inverse relationship underscores the fundamental combustion reaction,where carbon-based fuels react with oxygen to produce carbon dioxide and release ***,a comprehensive analysis has revealed that,from ignition to stable combustion,both nitric oxide（NO） and sulfur dioxide（SO2） emissions exhibit a declining *** reduction in pollutant generation is attributed to the improvement in combustion *** complete combustion leads to lower levels of unburned hydrocarbons,which are prone to NO ***,the sulfur content in the fuel is more efficiently oxidized to sulfur trioxide（SO3） or bound in sulfates,reducing *** steady state in the simulation,the SO2mass flow rate varies significantly with the furnace height,gradually increasing from 0.07 kg·s-1at 4 m at the bottom of the furnace to a peak of 0.078 kg·s-1at 8 m in the center,and then decreasing to 0.06 kg·s-1at 20m at the top of the furnace.

关键词： Sulfur dioxide

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Dynamic contrast-enhanced magnetic resonance imaging and diffusion-weighted imaging in the activity staging of terminal ileum Crohn's disease

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World Journal of Gastroenterology 2020年第39期26卷 6057-6073页

作者： Yin-Chen Wu ze-bin Xiao Xue-Hua lin Xian-Ying Zheng Dai-Rong Cao Zhong-Shuai Zhang Department of Radiology The First Affiliated Hospital of Fujian Medical UniversityFuzhou 350005Fujian ProvinceChina Department of Biomedical Sciences University of PennsylvaniaPhiladelphiaPA 19104United States Department of Diagnosis Imaging Siemens Healthcare LtdShanghai 201318China

BACKGROUND The activity staging of Crohn’s disease(CD)in the terminal ileum is critical in developing an accurate clinical treatment *** activity of terminal ileum CD is associated with the microcirculation of involved bowel *** contrast-enhanced magnetic resonance imaging(DCE-MRI)and diffusionweighted imaging(DWI)can reflect perfusion and permeability of bowel walls by providing microcirculation *** such,we hypothesize that DCE-MRI and DWI parameters can assess terminal ileum CD,thereby providing an opportunity to stage CD *** To evaluate the value of DCE-MRI and DWI in assessing activity of terminal ileum *** Forty-eight patients with CD who underwent DCE-MRI and DWI were *** patients’activity was graded as remission,mild and *** transfer constant(Ktrans),wash-out constant(Kep),and extravascular extracellular volume fraction(Ve)were calculated from DCE-MRI and the apparent diffusion coefficient(ADC)was obtained from *** Resonance Index of Activity(MaRIA)was calculated from magnetic resonance *** in these quantitative parameters were compared between normal ileal loop(NIL)and inflamed terminal ileum(ITI)and among different activity *** correlations between these parameters,MaRIA,the Crohn’s Disease Activity Index(CDAI),and Crohn’s Disease Endoscopic Index of Severity(CDEIS)were *** operating characteristic curve analyses were used to determine the diagnostic performance of these parameters in differentiating between CD activity *** Higher Ktrans(0.07±0.04 vs 0.01±0.01),Kep(0.24±0.11 vs 0.15±0.05)and Ve(0.27±0.07 vs 0.08±0.03),but lower ADC(1.41±0.26 vs 2.41±0.30)values were found in ITI than in NIL(all P<0.001).The Ktrans,Kep,Ve and MaRIA increased with disease activity,whereas the ADC decreased(all P<0.001).The Ktrans,Kep,Ve and MaRIA showed positive correlations with the CDAI(r=0.866 for Ktrans,0.870 for Kep,0.858 for Ve,0.890 for MaRIA

关键词： Crohn’s disease Ileum Magnetic resonance imaging Diffusion-weighted imaging Perfusion imaging

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Microglia in neurodegenerative diseases

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Neural Regeneration Research 2021年第2期16卷 270-280页

作者： Yu Xu Ming-Zhu Jin ze-Yong Yang Wei-lin Jin Department of Anesthesiology International Peace Maternity and Child Health HospitalShanghai Jiao Tong University School of MedicineShanghai Key Laboratory of Embryo Original DiseaseShanghai Municipal Key Clinical SpecialtyShanghaiChina Shanghai Jiao Tong University School of Medicine ShanghaiChina Institute of Nano Biomedicine and Engineering Department of Instrument Science and EngineeringKey Laboratory for Thin Film and Microfabrication Technology of Ministry of EducationSchool of Electronic Information and Electronic EngineeringShanghai Jiao Tong UniversityShanghaiChina National Centers for Translational Medicine Shanghai Jiao Tong UniversityShanghaiChina Shaanxi Key Laboratory of Brain Disorders&Institute of Basic and Translational Medicine Xi’an Medical UniversityXi’anShaanxi ProvinceChina

A major feature of neurodegeneration is disruption of central nervous system homeostasis,during which microglia play diverse *** the central nervous system,microglia serve as the first line of immune defense and function in synapse pruning,injury repair,homeostasis maintenance,and regulation of brain development through scavenging and *** pathological conditions or various stimulations,microglia proliferate,aggregate,and undergo a variety of changes in cell morphology,immunophenotype,and *** review presents the features of microglia,especially their diversity and ability to change dynamically,and reinterprets their role as sensors for multiple stimulations and as effectors for brain aging and *** review also summarizes some therapeutic approaches for neurodegenerative diseases that target microglia.

关键词： central nervous system microglia neurodegeneration neuroinflammation plasticity

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Primary follicular lymphoma in the renal pelvis:A rare case report

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World Journal of Clinical Cases 2021年第21期9卷 6026-6031页

作者： Xun-ze Shen Chen lin Fang Liu PET/CT Center Shaoxing People's Hospital(Shaoxing HospitalZhejiang University School of Medicine)Shaoxing 312000Zhejiang ProvinceChina Department of Pathology Shaoxing People's Hospital(Shaoxing HospitalZhejiang University School of Medicine)Shaoxing 312000Zhejiang ProvinceChina

BACKGROUND Follicular lymphoma(FL)is more common in lymph nodes,while primary extranodal lymphomas are *** tract lymphoid neoplasms are extremely rare,accounting for less than 5%of all extranodal *** one case of FL from the renal pelvis has previously been *** SUMMARY A 70-year-old male patient with a history of esophageal cancer visited our hospital for follow-up *** computed tomography revealed a malignant mass in the right renal *** whole-body positron emission tomography/computed tomography showed a significant increase in fluorodeoxyglucose uptake of this soft tissue mass and no abnormal fluorodeoxyglucose uptake in the esophageal *** patient underwent radical resection of a malignant tumor in the right kidney,which was confirmed by postoperative pathology to be *** patient received no radiation or chemotherapy after surgery,and no recurrence of lymphoma or other malignant tumors was found at the 1-year *** Extranodal FL is more common in the skin and gastrointestinal tract but rarely occurs in the urinary *** is the second report of primary renal *** extranodal FL is expected to have a favorable prognosis and can be cured by local resection.

关键词： Lymphoma Follicular lymphoma Renal pelvis Imaging Resection Case report

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Inversion analysis of the shear strength parameters for a high loess slope in the limit state

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Journal of Mountain Science 2021年第1期18卷 252-264页

作者： lin Xiao-yan ZHANG lin-fan YANG ze LI Ping LI Tong-lu School of Earth Sciences and Engineering Xi'an Shiyou UniversityXi'an 710065China Shaanxi Key Laboratory of Petroleum Accumulation Geology Xi'an Shiyou UniversityXi'an 710065China School of Geological Engineering and Surveying Chang'an UniversityXi'an 710061China

It is difficult to obtain reliable shear strength parameters for the stability analysis and evaluation of high loess ***,this paper determines slope elements and physical parameter of 79 slopes with heights of[40,120]m based on the measured loess slopes in the Ganquan and Tonghuang subregions of northern Shaanxi Province,*** the limit state of the loess slope(stability factor Fs is 1.0),a fitting equation for the slope height and width is ***,the model is developed by stability analysis software-SLOPE/W,and the comprehensive shear strength parameters corresponding to different slope heights of the high slope in the study area are obtained by inversion using the Morgenstern-Price *** results show that when the height of the slope increases,the cohesion c increases in the soil,and the internal friction angle j *** change is consistent with the characteristics reflected in the composition and physical properties of the slopes,and the comprehensive strength parametric curves are very similar between the Ganquan subregion and the Tonghuang subregion.A landslide that occurred in Miaodian-zaitou of Jingyang County,Shaanxi Province,is selected to verify this inversion method,and the results show that the calculated shear strength parameters of the inversion are consistent with the measured value of the actual slope.

关键词： Loess High slope Shear strength Inversion SLOPE/W

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A New p-Terphenyl Derivative from Basidiomycetes Boletopsis grisea

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Chinese Chemical Letters 2001年第4期12卷 335-336页

作者： lin HU ze Jun DON Ji Kai LIU Kunming Institute of Botany Chinese Academy of SciencesKunming 650204

A new p-terphenyl derivative 1 was isolated from the fruiting bodies of Boletopsis grisea. Its structure was established as 2. 3-diacetoxy-4 ', 4 ', 5, 6-tetrahydroxy-p-terphenyl by spectroscopic and chemical means.

关键词： Boletopsis grisea p-terphenyl derivative Basidiomycetes.

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Using Big Data to Discover Chaos in China’s Futures Market During COVID-19

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Computers, Materials & Continua 2021年第12期69卷 3095-3107页

作者： lin Tie bin Huang bin Pan Guang Sun Hunan University of Finance and Economics Changsha410205China University of Alabama TuscaloosaAL 35487U

COVID-19 was first reported in China and quickly spread throughout the *** investor confidence in government efforts to control the pandemic seriously affected global financial *** study investigated chaos in China’s futures market during COVID-19,focusing on the degree of chaos at different periods during the *** constructed a phase diagram to observe the attractor trajectory of index futures(IFs).During the COVID-19 outbreak,overall chaos in China’s futures market was increasing,and there was a clear correlation between market volatility and the macroenvironment(mainly government regulation).The Hurst index,calculated by rescaled range(R/S)analysis,was *** price and return of IFs showed long-term correlation and fractal characteristics;the relevant dimensions of the futures market were ***,under the influence of an emergency(COVID-19),chaos in China’s financial market intensified,creating a need for timely government intervention and macrocontrol of the *** study’s findings can help improve the government’s understanding of the phenomenon of financial chaos caused by *** study also provides theoretical guidance for controlling financial chaos and maintaining healthy economic development when faced with similar events in the future.

关键词： Chinese futures market COVID-19 chaos Lyapunov index Hurst index

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Investigation of the overconsolidation and structural behavior of Shanghai clays by element testing and constitutive modeling

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Underground Space 2016年第1期1卷 62-77页

作者： Guan-lin Ye bin Ye Department of Civil Engineering and State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Geotechnical Engineering Tongji UniversityShanghai 200092China

The mechanical properties and constitutive modeling of Shanghai clays are very important for numerical analysis on geotechnical engineering in Shanghai,where continuous layers of soft clays run 30-40 m *** clays are divided into 5 major layers.A series of laboratory tests are carried out to investigate their mechanical *** top and bottom layers are overconsolidated hard clays,and the middle layers are normally consolidated or lightly overconsolidated sensitive marine clays.A constitutive model,which can describe the overconsolidation and structure of soils using only 8 parameters,is modified to simulate the test results.A rational procedure to determine the values of the material parameters and initial conditions is also *** model is able to effectively reproduce both one-dimensional(1D)consolidation and drained/undrained triaxial test results of Shanghai clays,with one set of parameters for each *** element testing and constitutive modeling,two findings are ***,the decay rates of overconsolidation are smaller in overconsolidated layers than in normally consolidated ***,the natural microstructure of layer 4 is relatively stable,that is,a large degree of structure is still maintained in the specimen even after 1D consolidation and drained triaxial *** modified model and obtained parameter values can be used for numerical analysis of geotechnical projects in Shanghai.

关键词： Shanghai clays Laboratory tests Constitutive model Overconsolidation Structure

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Computer Aided Design of Heat Treatment for AISI P20+Ni Mold Steel with Good Machinability

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材料热处理学报 2004年第5期25卷 627-630页

作者： HUXin-bin GAOWen HEYan-lin LIlin Dept.Mater.Sci.＆Eng. ShanghaiUniversity149YanchangRoadShanghai200072China Dept.Mater.Sci.＆Eng. ShanghaiUniversity149YanchangRoadShanghai200072China／Dept.MechanicalEngineeringHubeiPolytechnicUniversityWuhan430068China ShanghaiNo.5steelCo. LTDofShanghaiBaosteelGroupCo.Shanghai200940China

Computer aided design of heat treatment for AISI P20 mold steel with good machinability is attempted to proceed by the commercial software package Thermo-Calc (TCP+DICTRA). Through experimental and theoretical analysis of phase transformation during heat treatment, further knowledge of designing proper heat treatment is obtained. Then the machinability of AISI P20+Ni steel under given heat treatment condition is studied and the influencing factors to their machinability are analyzed. It is shown that heat treatment designed by computer simulation of carbide transformation is applicable to AISI P20+Ni steel with good machinability; AISI P20+Ni steel with tempered sorbite treated by quenching & tempering has optimal machinability; normalizing at the temperature of 910°C & tempering can avoid cracking and result in acceptable machinability in small thickness module.

关键词：热处理 AISI P20+Ni模具钢可加工性计算机设计

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Influence of Residual Stress on Shape of Heavy-gauge,High-strength Steel Caused by Cooling Process after Hot Rolling

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Journal of Iron and Steel Research International 2016年第6期23卷 547-552页

作者： Shui-ze WANG Yong-lin KANG Guo-ming ZHU Wen LIANG School of Materials Science and Engineering University of Science and Technology Beijing Research and Development Center Wuhan Iron & Steel(Group)Co.Ltd.

The cooling process following hot rolling has a significant effect on the shape quality of a hot-rolled *** temperature and stress fields in the cooling process for a 14 mm thick strip with yield strength of 500 MPa grade were analyzed by the finite element method and actual test data,and the relationship between residual stress and shape defects was ***,the small-crown rolling process and the coil slow cooling process were *** results indicate that these processes improved the shape quality of the final product significantly.

关键词： rolling strip flatness gauge rolled crown thick tensile buckling defects

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