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Experimental Study on Geometry Characteristics of turbulent Premixed Flames for Natural Gas/Air mixtures

Journal of thermal Science 2025年第1期34卷 268-282页

作者： ZHENG Weilin wang Qijiao XIAO Huahua CHEN Xiaoxiao XIE Fan ZENG Wen Liaoning Key Lab of Advanced test technology for Aerospace Propulsion System Shenyang Aerospace University State Key Laboratory of Fire Science University of science and Technology of China AVIC Shenyang Aircraft Design and Research Institute

In this study,focusing on the geometry characteristics of spherical expanding flame,the turbulent premixed flames of natural gas/air mixtures were investigated in a fan-stirred turbulent *** effects of initial temperature（t=300-400 K）,initial pressure（P=0.1-0.3 mPa）,turbulence intensity（u'=1.0-2.7 m/s）,oxygen volumetric percentage(φ（O2）=15%-21%) and carbon dioxide volumetric percentage(φ（CO2）=0-20%)were delved *** flame profile under the Cartesian coordinate system was derived from the schlieren images taken by the high-speed ***,from both macroscopic and microscopic perspectives,the influence of experimental conditions on the flame geometry characteristics was explored through flame front extraction,wavelet decomposition and network *** results demonstrate that for significant flame wrinkling,changes in species concentrations and turbulence intensity have more pronounced effects on the flame wrinkling *** wrinkling of the flame front maintains a certain degree of similarity,as evidenced by the locally concentrated distribution of the angles of the maximum fluctuation *** disturbance energy under large-scale（D6-D8） disturbances exhibits relatively high values with a similar trend,exerting a significant impact on the geometry characteristics of the flame *** peaks of correlation degree are scattered either with the decomposition scale or the development of flame radius,indicating no linear correlation between different detail ***,the probability distribution of node degrees in key wrinkled regions exhibits different trends with that of large-scale wrinkling and disturbance energy,especially with changes in initial *** occurs because the number of key wrinkles varies based on the perturbation's strength or the region's ***,an increase in the fluctuation frequency of the flame's local radius may not necessarily lead to an increase in the number of key folded regions.

关键词： fan-stirred turbulent combustor geometry characteristics large-scale wrinkling network topology wavelet decomposition

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t cell interactions with microglia in immune-inflammatory processes of ischemic stroke

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Neural Regeneration Research 2025年第5期20卷 1277-1292页

作者： Yuxiao Zheng Zilin Ren Ying Liu Juntang Yan Congai Chen Yanhui He Yuyu Shi Fafeng Cheng Qingguo wang Changxiang Li Xueqian wang School of traditional Chinese medicine Beijing University of Chinese MedicineBeijingChina Library Beijing University of Chinese MedicineBeijingChina Dongzhimen Hospital Beijing University of Chinese MedicineBeijingChina

the primary mechanism of secondary injury after cerebral ischemia may be the brain inflammation that emerges after an ischemic stroke,which promotes neuronal death and inhibits nerve tissue *** the first immune cells to be activated after an ischemic stroke,microglia play an important immunomodulatory role in the progression of the *** an ischemic stroke,peripheral blood immune cells(mainly t cells)are recruited to the central nervous system by chemokines secreted by immune cells in the brain,where they interact with central nervous system cells(mainly microglia)to trigger a secondary neuroimmune *** review summarizes the interactions between t cells and microglia in the immune-inflammatory processes of ischemic *** found that,during ischemic stroke,t cells and microglia demonstrate a more pronounced synergistic ***1,th17,and m1 microglia can co-secrete proinflammatory factors,such as interferon-γ,tumor necrosis factor-α,and interleukin-1β,to promote neuroinflammation and exacerbate brain ***2,treg,and m2 microglia jointly secrete anti-inflammatory factors,such as interleukin-4,interleukin-10,and transforming growth factor-β,to inhibit the progression of neuroinflammation,as well as growth factors such as brain-derived neurotrophic factor to promote nerve regeneration and repair brain *** interactions between microglia and t cells influence the direction of the subsequent neuroinflammation,which in turn determines the prognosis of ischemic stroke *** trials have been conducted on the ways to modulate the interactions between t cells and microglia toward anti-inflammatory communication using the immunosuppressant fingolimod or overdosing with treg cells to promote neural tissue repair and reduce the damage caused by ischemic ***,such studies have been relatively infrequent,and clinical experience is still *** summary,in ischemic stroke,t cell subsets and activated micro

关键词： brain immune inflammation interaction ischemic stroke mechanism microglia neuron secondary injury t cells

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让大尺寸tFt-LCD电视更出色

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现代显示 2006年第4期 35-38页

作者：刘军廷王智伟洪泓杰谢曜任赖明升蔡宗光汪德美周明忠张文杰隋寿龄廖经桓田名峰友达科技中心友达光电

tFt-LCD已取得了迅速而重大的进步,成为大屏幕高清电视应用的重要技术选择。但是,较先进的色彩仿真工具和图像处理算法,使得更有可能进一步发展。

关键词：液晶电视薄膜晶体管液晶显示器图像处理算法色彩仿真工具

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Engineered Cancer Nanovaccines:A New Frontier in Cancer therapy

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Nano-micro Letters 2025年第2期17卷 134-168页

作者： Yijie wang Congrui Liu Chao Fang Qiuxia Peng Wen Qin Xuebing Yan Kun Zhang Central Laboratory and Department of medical Ultrasound Sichuan Academy of Medical SciencesSichuan Provincial People’s HospitalSchool of MedicineUniversity of Electronic Science and Technology of ChinaNo.32West Second SectionFirst Ring RoadChengdu 610072People’s Republic of China Department of Stomatology and Central Laboratory School of MedicineShanghai Tenth People’s HospitalTongji UniversityNO.301 Yan‑Chang‑Zhong RoadShanghai 200072People’s Republic of China Jiangsu Provincial Innovation and Practice Base for Postdoctors Suining People’s HospitalAffiliated Hospital of Xuzhou Medical UniversityNo.2Bayi West RoadSuiningXu Zhou 221000Jiangsu ProvincePeople’s Republic of China

Vaccinations are essential for preventing and treating disease,especially cancer nanovaccines,which have gained considerable interest recently for their strong anti-tumor immune *** can prompt the immune system to generate antibodies and activate various immune cells,leading to a response against tumor tissues and reducing the negative effects and recurrence risks of traditional chemotherapy and *** enhance the flexibility and targeting of vaccines,nanovaccines utilize nanotechnology to encapsulate or carry antigens at the nanoscale level,enabling more controlled and precise drug delivery to enhance immune *** nanovaccines function by encapsulating tumor-specific antigens or tumor-associated antigens within *** small size of these nanomaterials allows for precise targeting of t cells,dendritic cells,or cancer cells,thereby eliciting a more potent anti-tumor *** this paper,we focus on the classification of carriers for cancer nanovaccines,the roles of different target cells,and clinically tested cancer nanovaccines,discussing strategies for effectively inducing cytotoxic t lymphocytes responses and optimizing antigen presentation,while also looking ahead to the translational challenges of moving from animal experiments to clinical trials.

关键词： Cancer nanovaccines Immunotherapy Nanobiotechnology Immune targets Signaling pathway

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Boosting hydrocarbon conversion via Cu-doping induced oxygen vacancies on CeO2 in CO2 electroreduction

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Journal of Energy Chemistry 2025年第1期100卷 66-76页

作者： Lei Xue tong Shi Chenhui Han Heng Zhang Fenrong Liu Haorun Li Yan wang Xiaojun Gu Shanghong Zeng Inner mongolia Key Laboratory of Chemistry and Physics of Rare Earth materials School of Chemistry and Chemical Engineering Inner Mongolia University State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Institute of Catalysis Department of Chemistry Zhejiang University National Key Laboratory of Baiyunobo Rare Earth Resource Research and Comprehensive Utilization Baotou Research Institute of Rare Earths

Conversion of CO2back to hydrocarbons is the most direct way of closing the“carbon cycle”,and its significance is further enlarged if this process is driven by renewable energies such as ***,precisely controlling the product selectivity towards hydrocarbons against the competitive hydrogen evolution remains challenging,especially for Cu-based ***,we report a novel defect engineering strategy,by which Cu-doping-induced oxygen vacancies on CeO2nanorods were effectively created,with adjustable vacancy/Cu *** resulting optimum catalyst shows up to 79% catalytic current density to hydrocarbons （excluding CO）,with 49% faradaic efficiency to *** and density functional theory unveil that the ratio between oxygen vacancy and Cu affects significantly the formation of*CHO and activation of H2O,which leads to the following deep hydrogenation to *** findings may spur new insights for designing and developing more controllable chemical process relevant to CO2utilization.

关键词： Nanorods

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Association of glutathione S-transferase t1 and m1 gene polymorphisms with ischemic stroke risk in the Chinese Han population

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Neural Regeneration Research 2012年第18期7卷 1420-1427页

作者： Rui wang Yan wang Junhong wang Kun Yang Department of Neurology Affiliated Hospital of Qingdao University Medical College Qingdao 266003 Shandong Province China Central Laboratory Affiliated Hospital of Qingdao University Medical College Qingdao 266003 Shandong Province China

Atherosclerosis plays an important role in ischemic stroke, and oxidative stress participates in the entire process of atherosclerosis. Glutathione S-transferase （GSt） acting with other antioxidant enzymes can eliminate reactive oxygen species and protect cells against oxidative damage. to assess the association of glutathione S-transferase （GStt1 and GStm1） gene polymorphisms with ischemic stroke in the Chinese Han population, the present study selected 315 patients with ischemic stroke and 210 healthy controls for comparison. GStt1 and GStm1 genotypes were determined using polymerase chain reactions, electrophoresis and imaging analysis. No obvious evidence of GSttI-nulI, GStmI-null and GSttI/GStmI-double null genotype distribution differences was found between case and control groups or between genders. Subgroup analysis showed that the risk of stroke was increased when hypertension was accompanied by GSttl-null （odds ratio （OR） = 2.996, P 〈 0.001） and GStml-null （OR = 3.680, P 〈 0.001 ） genotypes; diabetes mellitus was accompanied by GSttI-null （OR = 1.860, P = 0.031） and GStmI-null （OR = 2.444, P = 0.002） genotypes, and smokers showed a GSttl-null genotype （OR = 2.276, P = 0.003）. GStt1- and GStml-null genotypes may interact synergistically with hypertension, diabetes mellitus and smoking to increase the incidence risk of ischemic stroke.

关键词： glutathione S-transferase GStt1 GStm1 gene polymorphism ischemic stroke risk factors stroke neural regeneration

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Slip effects on shearing flows in a porous medium

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Acta mechanica Sinica 2008年第1期24卷 51-59页

作者： m.Khan t.Hayat Y.wang Department of mathematics Quaid-i-Azam University Islamabad 44000 Pakistan Chair of Fluid Dynamics Department of Mechanical Engineering Darmstadt University of TechnologyHochschulstrasse 164289 Darmstadt Germany

this paper deals with the magnetohydrodynamic （mHD） flow of an Oldroyd 8-constant fluid in a porous medium when no-slip condition is no longer valid. modified Darcy＇s law is used in the flow modelling. the non-linear differential equation with non-linear boundary conditions is solved numerically using finite difference scheme in combination with an iterative technique. Numerical results are obtained for the Couette, Poiseuille and generalized Couette flows. the effects of slip parameters on the velocity profile are discussed.

关键词： Porous medium. magnetohydrodynamic flow Slip effect

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Identification of a disulfide bonded protein from cytoplasm of Bacillus subtilis

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Chinese Science Bulletin 1997年第20期42卷 1756-1760页

作者： wang, t Kadokura, H Yamasaki, m Chinese Acad Sci Inst Bot Beijing 100095 Peoples R China

DISULFIDE bonds are important for some proteins to form stable secondary or tertiary conforma-tion. these known disulfide bonded proteins are mainly present in periplasm or cel1ular or-ganelles, most of which are secreted proteins or membrane proteins. It is generally recog-nized that cytoplasmic proteins do not have disulfide bonds because of reducing environment

关键词： Bacillus subtilis cytoplasm disulfide bonded protein.

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

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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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Association between t174m polymorphism in the angiotensinogen gene and risk of coronary artery disease: a meta-analysis

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Journal of Geriatric Cardiology 2013年第1期10卷 59-65页

作者： Wen-Zhu wang Department of Neurology Saint Petersburg Pavlov State Medical University St. Petersburg 197022 Russia

Background Angiotensinogen (AGt) t174m gene polymorphism has been suggested to be linked to risk of coronary artery disease, however, results from studies of this association have been inconsistent. In this study, we assess the relationship between AGt t174mgene polymorphism and coronary artery disease. methods We conducted a meta-analysis of 18 case-control studies with 8,147 coronary artery disease cases and 5,344 controls in Google scholar, Pubmed, Cochrane Library and China National Knowledge Infrastructure (CNKI) databases to identify eligible studies published by July, 2012. Odds ratios (OR) and 95% confidence intervals (95% CI) were calculated from these studies. Results Overall, a significant association was found between angiotensinogen t174m polymorphism and coronary artery disease risk when all studies were pooled into the meta-analysis (tt vs. mm:OR = 0.53, 95%CI = 0.40–0.71; dominantmodel: OR = 1.16,95% CI = 1.01–1.35; recessive model: OR = 0.54, 95% CI = 0.40–0.72). In a stratified analysis, the results indicate a significant association in Caucasians suffering from coronary stenosis (tt vs. mm: OR = 0.38, 95% CI = 0.23–0.63; recessive model: OR = 0.39, 95% CI =0.23–0.64). No significant increased risk for coronary artery disease was found in Asians. Conclusions the meta-analysis indicate a significant association of t174mpolymorphism with coronary stenosis risk in Caucasians.

关键词： Angiotensinogen Coronary artery disease meta-analysis Polymorphism

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