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流固耦合分析血液黏滞系数对重度狭窄颈动脉的影响

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国际医学放射学杂志 2017年第5期40卷 524-527,531页

作者：李建伟纪盛章宋金玉郑珺刘明琪天津市第四中心医院放射科天津300140

目的基于流固耦合(FSI)力学的方式,分析不同血液黏滞系数对重度狭窄颈动脉的血液流速及壁面剪切力(WSS)的影响。方法选取2015年8月于天津市第四中心医院经CT血管成像(CTA)检查诊断为颈内动脉重度狭窄(狭窄程度为75%)的1例62岁男性病人,... 详细信息

目的基于流固耦合(FSI)力学的方式,分析不同血液黏滞系数对重度狭窄颈动脉的血液流速及壁面剪切力(WSS)的影响。方法选取2015年8月于天津市第四中心医院经CT血管成像(CTA)检查诊断为颈内动脉重度狭窄(狭窄程度为75%)的1例62岁男性病人,将其CTA影像数据制作模型,导入FSI分析软件中,分别设定血液黏滞系数为1、3.5、6、8.5、11 c P并进行运算。在运算结果中测量并分析颈总动脉末端(A1)、颈动脉窦水平(A2)、颈内动脉狭窄处(A3)、颈内动脉狭窄处远端(A4)截面的血液流速和WSS值。结果随着血液黏滞系数的升高,A1、A2、A3、A4的血流速度均值降低,WSS均值增大;A4的中心血液流速降低,A1、A2和A3的中心血流速度升高。结论随着颈动脉重度狭窄病人的血液黏滞系数升高,其脑部供血不足趋于严重化,从而导致急性脑卒中的发生,而且造成狭窄位置斑块的破损概率和面积进一步增大,因此应引起临床的高度重视并及时干预。

关键词：重度狭窄颈动脉流固耦合血液黏滞系数流速壁面剪切力

超声测量腹部肝前脂肪最大厚度预测冠状动脉疾病的发生及严重性

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临床超声医学杂志 2013年第3期15卷 157-160页

作者：杨培胜刘新红黄淑华宋金玉天津市第四中心医院B超室 300140

目的应用超声测量肝前脂肪最大厚度(Vmax),预测其在冠状动脉疾病的发生及严重性。方法选自我院行冠状动脉造影的患者185例,根据有无冠状动脉狭窄进行分组,其中冠心病患者144例,非冠心病患者41例。应用超声测量两组患者的Vmax及皮下脂肪... 详细信息

目的应用超声测量肝前脂肪最大厚度(Vmax),预测其在冠状动脉疾病的发生及严重性。方法选自我院行冠状动脉造影的患者185例,根据有无冠状动脉狭窄进行分组,其中冠心病患者144例,非冠心病患者41例。应用超声测量两组患者的Vmax及皮下脂肪厚度最小值(Smin),并对两组各参数进行比较分析。通过绘制受试者特征曲线比较分析Vmax与传统预测冠状动脉疾病的危险因素腰围预测冠状动脉疾病的能力。结果冠心病组患者Vmax增加,与非冠心病组比较差异有统计学意义(P<0.001),Smix无明显增加;Vmax随病变血管数目增多而增加(P<0.05),Vmax与Smin呈低度正相关(r=0.397,P<0.001)。ROC曲线分析Vmax预测冠状动脉疾病的临界值分别为0.84cm,敏感性73.6%,特异性68.3%,曲线下面积为0.716,P<0.001,较腰围(敏感性72.9%,特异性58.5%,曲线下面积0.612,P=0.028)能更好地预测冠状动脉疾病。结论 Vmax能独立预测冠状动脉疾病发生和严重性,与传统预测冠状动脉疾病的危险因素腰围比较,超声测量Vmax可为临床提供新信息。

关键词：超声检查冠状动脉疾病内脏脂肪厚度皮下脂肪厚度

Pollution characteristics and risk assessment of organophosphate esters in aquaculture farms and natural water bodies adjacent to the Huanghe River delta

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Journal of Oceanology and Limnology 2023年第1期41卷 251-266页

作者： jinyu CHAO song FENG Yingdong HAO Jianing LIN Bin ZHANG School of Architecture and Civil Engineering Xihua UniversityChengdu 610039China Institute of Eco Environmental Forensics Shandong UniversityQingdao 266237China School of Environmental Science and Engineering Shandong UniversityQingdao 266237China School of Food and Biotechnology Xihua UniversityChengdu 610039China CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Shandong Yellow River Delta National Nature Reserve Administration Committee Dongying 257091China

To date,little attention has been paid to the effects of organophosphate esters(OPEs)pollution on aquacultural environment and aquatic product ***(Yellow)River delta area is one of the largest aquaculture centers in China,where ecological security protection is crucial in the national strategy of *** explore the pollution characteristics,bioaccumulation,and health risks of OPEs in aquaculture farms in the Huanghe River delta and natural water bodies in the adjacent seas,five species of organisms from different farm types nearby the Huanghe River delta,and the corresponding culture water and sediments were sampled in this *** total concentrations of Σ_(13)OPEs in water,sediments,and organisms were 51.53-272.18 ng/L,52.63-63.17 ng/g dry weight(dw),and 46.82-108.90 ng/g dw,*** the five types of culture ponds,the water samples from the swimming crab and hairy crab culture ponds exhibited higher OPEs,the concentration of OPEs in the sediments from the few ponds was relatively balanced,and the OPEs in the organism from the holothurian ponds was ***(1,3-dichloro-2-isopropyl pho sphate)(TDCP)was the main contaminant in water samples and tripropyl phosphate(TPrP)in sediments and ***,trisphenyl phosphate(TPhP)showed the strongest bioaccumulation ability,followed by 2-ethylhexyl diphenyl phosphate(EHDPP)and *** bioaccumulation capacities of the five species were as follows:prawn>holothurian>hairy crab>swimming crab>*** five types of organisms,as main seafood in human consumption,were at low risk of negative impacts of ***,the risk from the mixture of organophosphate flame retardants(OPFRs)still requires more attention due to the increasing consumption and production in the world.

关键词： organophosphate esters(OPEs) aquaculture farms bioaccumulation health risk assessment

Rationalizing the impact of oxygen vacancy on polysulfide conversion kinetics for highly efficient lithium-sulfur batteries

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Journal of Energy Chemistry 2023年第12期87卷 51-60,I0003页

作者： Ya song Huan Li Junfeng Li jinyu An Jiao-Jing Shao Guangmin Zhou School of Materials and Metallurgy Guizhou UniversityGuiyang 550025GuizhouChina School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaideSA 5005Australia Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina College of Civil Engineering Guizhou UniversityGuiyang 550025GuizhouChina

The“shuttle effect”of lithium polysulfides(LiPSs)is a huge challenge for practical use of high-energydensity lithium-sulfur(Li-S)batteries,and one of the main reasons is the sluggish kinetics of sulfur *** oxides are able to expedite the sulfur electrochemistry,and the structural defects enhance the adsorption-conversion ability of metal oxides for ***,a significant research gap still remains regarding the relationship between the oxygen vacancy concentration and the adsorptivecatalytic performance of metal ***,we establish a correlation between oxygen vacancy concentration and adsorptive-catalytic properties by using tungsten oxide(WO_(x))as model *** is revealed that high-concentration oxygen vacancy is beneficial for enhancing the binding between tungsten oxide and LiPSs,reducing the energy barrier of Li_(2)S decomposition,and promoting polysulfide conversion ***,the Li-S batteries using the tungsten oxide with high-concentration oxygen vacancies deliver high initial discharge capacity of 1169 mA h g^(-1)at 0.2 C and 865 mA h g^(-1)at 2 C,low attenuation rate of 0.064%per cycle over 1100 cycles at 2 *** a high sulfur area loading of 5.34 mg cm^(-2),the Li-S batteries still exhibit high initial gravimetric capacity of 982 mA h g^(-1)at 0.1 C and areal capacity of 5.92 mA h cm^(-2).This work promotes the feasibility of defect engineering on metal oxides as an effective mean to enhance the practicality of Li-S batteries.

关键词： Shuttl eeffect Oxygen vacancy Interlayer Lithium-sulfur batteries

Selective conversion of cellulose to hexitols over bi-functional Ru-supported sulfated zirconia and silica-zirconia catalysts

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Frontiers of Chemical Science and Engineering 2015年第4期9卷 461-466页

作者： Zhiqiang song Hua Wang Yufei Niu Xiao Liu jinyu Han Key Laboratory for Green Chemical Technology School of Chemical Engineering and TechnologyTianjin University Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072China

We report a process of selective conversion of microcrystalline cellulose to hexitols over bi-functional Ru-supported sulfated zirconia and silica-zirconia catalysts. A 58.1% yield of hexitols and a 71.0% conversion of cellulose were achieved over Ru/SZSi（100：15）-773 catalyst at 443 K. The as-synthesized catalysts were characterized by X-ray diffraction （XRD）, BET, thermogravimetric analysis and pyridine adsorption Fourier transform infrared spectroscopy （FTIR）. XRD results indicated that the sulfated catalysts were pure tetragonal phase of ZrO2 when calcined at 773 K. Monoclinic zirconia appeared at the calcination temperature of 873 K, and the content of monoclinic phase increased with the elevating temperature. Compared with sulfated zirconia catalyst, sulfated silica-zirconia catalysts possessed a higher ratio of Bronsted to Lewis on the surface of catalysts, as shown from pyridine adsorption FTIR results. The reaction results indicated that the tetragonal zirconia, which is necessary for the formation of superacidity, was the active phase to cellulose conversion. The higher amounts of Bronsted acid sites can remarkably accelerate the cellulose depolymerization and promote side reactions that convert C5-C6 alcohols into the unknown soluble degradation products.

关键词： cellulose hexitols hydrogenation sulfatedzirconia ruthenium

Preparation and CO2 adsorption properties of porous carbon by hydrothermal carbonization of tree leaves

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Journal of Materials Science & Technology 2019年第5期35卷 875-884页

作者： Guangzhi Yang Shen song Jing Li Zhihong Tang jinyu Ye Junhe Yang School of Materials Science and Engineering University of Shanghai for Science and Technology Shanghai 200093 China Shanghai Innovation Institute for Materials Shanghai 200444 China

Porous carbon materials were prepared by hydrothermal carbonization(HTC) and KOH activation of camphor leaves and camellia leaves. The morphology, pore structure, chemical properties and CO2 capture ability of the porous carbon prepared from the two leaves were compared. The effect of HTC temperature on the structure and CO2 adsorption properties was especially investigated. It was found that HTC temperature had a major effect on the structure of the product and the ability to capture CO2. The porous carbon materials prepared from camellia leaves at the HTC temperature of 240℃ had the highest proportion of microporous structure, the largest specific surface area(up to 1823.77m^2/g) and the maximum CO2 adsorption capacity of 8.30mmol/g at 25℃ under 0.4 MPa. For all prepared porous carbons, simulation results of isothermal adsorption model showed that Langmuir isotherm model described the adsorption equilibrium data better than Freundlich isotherm model. For porous carbons prepared from camphor leaves, pseudo-first order kinetic model was well fitted with the experimental data. However,for porous carbons prepared from camellia leaves, both pseudo-first and pseudo-second order kinetics model adsorption behaviors were present. The porous carbon materials prepared from tree leaves provided a feasible option for CO2 capture with low cost, environmental friendship and high capture capability.

关键词： Porous carbon Hydrothermal carbonization KOH activation CO2 adsorption

深度融合信息技术的风景园林专业新工科改造升级路径探索与实践--以长春建筑学院风景园林专业为例

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兰州职业技术学院学报 2024年第2期40卷 26-29,49页

作者：刘宝昌何玉会刘晓丹尹丹宋金钰长春建筑学院建筑与规划学院吉林长春130607

在新工科建设背景下,针对我国风景园林行业和专业发展现存问题,以长春建筑学院风景园林专业为例,通过调整人才培养目标、构建课程体系、重构教学环境、丰富教学资源、实施混合式教学、开展虚拟实验教学、改革教学评价、提升教师信息化... 详细信息

在新工科建设背景下,针对我国风景园林行业和专业发展现存问题,以长春建筑学院风景园林专业为例,通过调整人才培养目标、构建课程体系、重构教学环境、丰富教学资源、实施混合式教学、开展虚拟实验教学、改革教学评价、提升教师信息化应用能力等举措,探索深度融合现代信息技术的风景园林专业新工科改造升级路径。实践证明,风景园林专业的改造升级工作取得了明显成效,培养的人才更加适应时代和行业的需求。

关键词：新工科风景园林改造升级信息技术

Effects of an ectomycorrhizal fungus on the growth and physiology of Pinus sylvestris var. mongolica seedlings subjected to saline-alkali stress

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Journal of Forestry Research 2020年第3期31卷 781-788页

作者： Dachuan Yin Saiyaremu Halifu Ruiqing song jinyu Qi Xun Deng Jifeng Deng College of Forestry Shenyang Agricultural UniversityShenyang 110866People’s Republic of China College of Forestry Northeast Forestry UniversityHarbin 150040People’s Republic of China Forestry Protection Institute of Heilongjiang Forestry Academy Harbin 150040People’s Republic of China

This research investigates the mechanism of increased salinity tolerance of ectomycorrhizal fungiinoculated P. sylvestris var. mongolica to provide a theoretical basis for the application of the fungus in saline *** effects due to inoculation of seedlings with Suillus luteus(a symbiotic ectomycorrhizal fungus), were determined in four kinds of saline–alkali soils. Growth and physiological indicators, including photosynthetic characteristics, plant height, biomass, photosynthetic pigments,catalase(CAT) and superoxide dismutase(SOD) enzyme levels, and malondialdehyde(MDA), an organic marker for oxidative stress, and soluble protein levels were determined. Mycorrhizal colonization rate decreased with increasing saline–alkalinity and growth of inoculated seedlings was significantly enhanced. Biomass and chlorophyll contents also increased significantly. SOD and CAT activities were higher than in non-inoculated seedlings. However, MDA content decreased in inoculatedseedlings. Soluble protein content did not increase significantly. Inoculation with a symbiotic ectomycorrhizal fungus could enhance the saline–alkali tolerance of P. sylvestris var. mongolica. Growth and physiological performance of inoculated seedlings were significantly better than that of uninoculated seedlings. The results indicate that inoculated P. sylvestris var. mongolica seedlings may be useful in the improvement of saline–alkali lands.

关键词： Ectomycorrhizal fungi Saline–alkali stress Pinus sylvestris var mongolica Physiological and biochemical mechanisms

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格尔木炼油厂蒸汽系统优化节能分析与实践

石油石化节能 2022年第1期12卷 14-17,I0003页

作者：康耀明叶行邱海涛陈向平宋锦钰青海油田公司格尔木炼油厂生产运行科青海海西蒙古族藏族自治州格尔木816000 青海油田公司炼油化工部青海油田公司质量安全环保处青海油田公司格尔木炼油厂青海海西蒙古族藏族自治州格尔木816000

随着格尔木炼油厂的不断发展,蒸汽系统的规模也逐渐变得庞大、复杂,使得蒸汽系统的统一规划、管理、使用难度都大大增加。蒸汽的使用效率低、凝结水回收利用率低、凝结水余热不能有效利用、计量设施不能发挥作用、现有的产汽系统不能满... 详细信息

随着格尔木炼油厂的不断发展,蒸汽系统的规模也逐渐变得庞大、复杂,使得蒸汽系统的统一规划、管理、使用难度都大大增加。蒸汽的使用效率低、凝结水回收利用率低、凝结水余热不能有效利用、计量设施不能发挥作用、现有的产汽系统不能满足炼厂的进一步发展需求。通过开展全厂蒸汽系统优化,可以全面掌握炼厂蒸汽使用情况,实现"三级"蒸汽管网,满足产品质量升级改造新上装置的用汽要求,最大限度地降低锅炉运行负荷,实现节能降耗。

关键词：格尔木炼油厂余热回收 “三级”蒸汽管网锅炉