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中国乳品工业 2009年第12期37卷 51-53页

作者：赵雯玮陈祥贵杨潇郝吉生饶夙刘振平西华大学生物工程学院四川成都610039 河南省安阳市质量技术监督检验测试中心河南安阳455000

建立了HPLC二级管阵列检测器检测液态奶中叶酸的方法。该法相关系数为0.9996,平均回收率在81.8%～88.77%之间,最低检测限为1.5μg/L。本方法简单、快捷、灵敏,可用于液态奶中叶酸的日常分析。

关键词：叶酸液态奶高效液相色谱

Applications of Liutex-based force field models for cavitation simulation

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Journal of Hydrodynamics 2021年第3期33卷 488-493页

作者： Min-sheng zhao wei-wen zhao De-cheng Wan Yi-qian Wang Computational Marine Hydrodynamics Lab(CMHL) School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China Ocean College Zhejiang UniversityZhoushan316021China School of Mathematical Science Soochow UniversitySuzhou215006China

When studying the flow dynamics and the characteristics of fluid motion,vortex structure with their interactions is the key *** the present work,a vortex control method is investigated based on the vortex identification system of *** numerical study is carried out in OpenFOAM by directly adding a source term to the Navier-Stokes equations,which is called the centripetal force model in Liutex method.A 2-D test case is examined to justify the proposed method in cavitating flow around Clark-Y hydrofoil,the simulation results show that the improved Liutex solver is *** of controlling the rotation strength of vortices are able to change the flow field and suppress the *** applicability of vortex-based control method in 3-D flow field is also *** results show that cavitation surrounded by particular vortex can be effectively influenced.

关键词： Liutex force model cavitation vortex control

Numerical study of free end effect of cylinder with low aspect ratios on vortex induced motion

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Journal of Hydrodynamics 2022年第1期34卷 106-115页

作者： Jia-wei He wei-wen zhao De-cheng Wan Yi-qian Wang Computational Marine Hydrodynamics Lab(CMHL) School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China Ocean College Zhejiang UniversityZhoushan316021China School of Mathematical Science Soochow UniversitySuzhou215006China

In this paper,numerical simulation is conducted via our in-house solver,vim-FOAM-SJTU,developed on open-source software,*** around static rigid cylinders and elastically mounted rigid cylinder constrained to free stream with free end are numerically *** significant conclusions are made by analyzing the different results between cases with and without free *** turbulence model is implemented with a shear stress transport-based(SST-based)improved delayed detached eddy simulation(IDDES)approach in the ***,The paper starts with the application of the vim-FOAM-SJTU solver to flow past fixed cylinder with free end at Reynolds number *** numerical results are compared with experimental *** are satisfactory which implies the validity and accuracy of the current computational fluid dynamics(CFD)*** flow visualization in the vicinity of free-end is ***,the solver is utilized to simulate the free end effect associated with the VIM of a cylinder submerged in *** motion responses under different inflow velocities are *** relationship between transverse motion frequency,in-line motion frequency is ***,the effect of the free end on the vortex of the wake field is analyzed by comparing the 3-D vorticity diagrams of the free end *** responses of circular cylinder with or without free end are compared.

关键词： Fluid-structure interaction vim-FOAM-SJTU solver vortex induced motion(VIM) Three-dimensional character

Development of naoe-FOAM-SJTU solver based on OpenFOAM for marine hydrodynamics

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Journal of Hydrodynamics 2019年第1期31卷 1-20页

作者： Jian-hua Wang wei-wen zhao De-cheng Wan Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration School of Naval ArchitectureOcean and Civil EngineeringState Key Laboratory of Ocean EngineeringShanghai Jiao Tong UniversityShanghai 200240China

A CFD solver naoe-FOAM-SJTU (The abbreviation naoe stands for naval architecture and ocean engineering) is developed based on the open source platform OpenFOAM with the purpose of simulating various marine hydrodynamic *** the present paper,self-developed modules,i.e.,wave generation and absorption,6 degrees of freedom motion,mooring system,dynamic overset grid,fluid-structure interaction,unsteady actuator line model,implemented on the open source platform OpenFOAM are introduced to illustrate the development of the marine hydrodynamics CFD ***,extensive simulations of marine hydrodynamic problems using the developed modules are conducted and validated by available experimental *** has been proved that the CFD solver naoe-FOAM-SJTU is suitable and reliable in predicting the complex viscous flow around ship and offshore *** and accuracy need to be focused in the future development of the present CFD solver.

关键词： Marine hydrodynamics fluid-structure interaction overset grid naoe-FOAM-SJTU solver OpenFOAM

Numerical analysis of coupled sloshing and motion of a cylindrical FPSO in regular waves

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Journal of Hydrodynamics 2024年第3期36卷 457-465页

作者： wei-wen zhao Xiao-long Yang De-cheng Wan Computational Marine Hydrodynamics Lab(CMHL) School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China Offshore Oil Engineering Co.Ltd. Tianjin300461China

In this paper,the coupled sloshing and motion characteristics of a cylindrical floating production storage offloading(CFPSO)are numerically investigated by means of computational fluid dynamics(CFD)*** simulations are performed using an in-house CFD solver naoe-FOAM-SJTU which is developed based on *** active wave generating-absorbing boundary condition(GABC)is utilized for wave generation and *** stabilized k-omega SST turbulence model are used to avoid excessive eddy viscosity near the free *** with and without partially filled liquid tanks in regular waves with different wave periods are simulated and vertical planar motions such as surge,heave and pitch response amplitude operators(RAOs)are *** due to liquid sloshing and wave loads are extracted and *** free surface motions inside liquid tanks in one wave period presented to explain the motion characteristics.

关键词： Coupled analysis liquid sloshing wave motion cylindrical floating production storage offloading(CFPSO)

Omega-Liutex method for the interaction among wave, current and fixed vertical cylinder

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Journal of Hydrodynamics 2023年第1期35卷 83-94页

作者： Bo Han Zhi Pan wei-wen zhao De-cheng Wan Computational Marine Hydrodynamics Lab(CMHL) School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China Wuhan Second Ship Design and Research Institute Wuhan430205China

This paper presents a numerical investigation of the interaction among wave,flow and a fixed cylinder using the naoe-FOAM-SJTU solver,which is a viscous solver for hydrodynamics based on *** simulation considers the strong nonlinear interaction among a regular wave,flow,and a single fixed cylinder due to viscosity,which is common in offshore *** study focus on the vortex induced by viscosity and its significant role in hydrodynamic performance computation.A mesh convergence study is conducted prior to the simulation,and a proper set of mesh is *** simultaneous generation of the regular wave and flow is realized using the numerical field boundary,and the wave propagation is *** results of wave elevation and pressures captured by wave gauges and probes around the fixed cylinder are compared with experiment *** structure of vortices is displayed at significant times,and the phenomena of wave elevation and pressure changes around the cylinder are analyzed in detail using the Omega-Liutex identification method.

关键词： Wave-current interaction vortex Omega-Liutex method naoe-FOAM-SJTU solver numerical simulation

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双针-板结构脉冲气泡放电等离子体固氮研究

原子与分子物理学报 2025年第6期42卷 122-128页

作者：赵少伟张丽方志南京工业大学电气工程与控制科学学院南京211816

大气压低温等离子体可以利用空气直接进行氧化固氮,具有反应条件温和、参数灵活可控、避免温室气体排放等优点.本文利用双针-板电极在水中形成气泡放电等离子体,以空气为放电气体进行了固氮研究,分析了产物浓度和固氮能耗的影响因素.研... 详细信息

大气压低温等离子体可以利用空气直接进行氧化固氮,具有反应条件温和、参数灵活可控、避免温室气体排放等优点.本文利用双针-板电极在水中形成气泡放电等离子体,以空气为放电气体进行了固氮研究,分析了产物浓度和固氮能耗的影响因素.研究结果表明,等离子体中含有丰富的氮原子、氧原子、氢原子、激发态氮分子等活性物种,可高效合成硝态含氮产物.研究发现,脉冲参数、电极间隙、工作气体组分对气泡放电等离子体的固氮性能有重要影响.装置最高NO~-_x合成速率为19.2μmol/min,最小能耗约为11 MJ/mol.此外还发现,电极间隙为6 mm时,固氮性能最优;空气中增加适量氧气(氧气/氮气比例为0.4)可以增强产物合成,降低能耗.

关键词：低温等离子体纳秒脉冲放电气液放电固氮

脂肪间充质干细胞对百草枯中毒引起的急性肺损伤炎症影响的研究

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临床急诊杂志 2017年第2期18卷 90-92,97页

作者：吴林李俊杰张松涛赵威尹文第四军医大学西京医院急诊科西安710032

目的:探讨小鼠脂肪间充质干细胞(ADSCs)能否减缓百草枯中毒引起的小鼠肺损伤。方法:体外分离和培养小鼠ADSCs并观察细胞形态;取第3代细胞,采用流式细胞仪检测细胞表面标志物CD29、CD31、CD34、CD90和CD105的表达情况;另取第3代细胞,进... 详细信息

目的:探讨小鼠脂肪间充质干细胞(ADSCs)能否减缓百草枯中毒引起的小鼠肺损伤。方法:体外分离和培养小鼠ADSCs并观察细胞形态;取第3代细胞,采用流式细胞仪检测细胞表面标志物CD29、CD31、CD34、CD90和CD105的表达情况;另取第3代细胞,进行成脂和成骨诱导分化鉴定。45只SPF级雄性C57BL/6小鼠随机分为3组:百草枯组、ADSCs治疗组以及正常对照组。通过尾静脉注射ADSCs到小鼠体内,观察小鼠血浆中肿瘤坏死因子-α(TNF-α)、白介素-1β(IL-1β)的表达变化和肺组织纤维化程度的变化。结果:分离培养的细胞呈典型的成纤维样;细胞CD29、CD90、CD105阳性表达率分别高达99.5%,94.8%,73.7%;CD31和CD34阳性表达率几乎为0;细胞经诱导后可分化为脂肪细胞和成骨细胞。综上,细胞鉴定为ADSCs。与百草枯组比较,ADSCs治疗组可明显降低血浆中TNF-α、IL-1β的含量(P<0.05);肺组织Masson染色显示ADSCs治疗组能够降低肺组织纤维化程度。结论:ADSCs可减缓急性百草枯中毒引起的肺损伤。

关键词：脂肪间充质干细胞百草枯肺损伤中毒

Effects of adsorption interferents on removal of Reactive Red 195 dye in wastewater by chitosan

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Journal of Environmental Sciences 2005年第5期17卷 766-769页

作者： wen Yue-zhong LIU wen-qi FANG zhao-hua LIU wei-ping Institute of Environmental Science Zhejiang University Hangzhou 310027 China Department of Environment Science and Engineering Nanchang University Nanchang 330029 China

Reactive Red 195, which is an azoic anionic dye characterized by the presence of five sulfonic groups and one azoic group, is efficiently removed using chitosan. The increasing chitosan dose had a dramatic positive impact on the achieved color removal, there was approximately a linear relationship between chitosan dose and color removal of dye before color removal reach maximum. Also, the increase of dye concentration led to the increase of chitosan dosage in order to get the same color remova l.92 mg/L of chitosan dosage was sufficient to achieve complete remove of dye at initial concentration of dye at 200 mg/L. For the higher concentrations of dye, high dosages were necessary to reach complete color removal. On the other hand, the use of adsorption interferents（Fe^2＋ , Na^＋ , HCO3^- and others） can be interesting, addition of ions had effect on the color removal of Reactive Red 195. Comparing with blank, addition of chemical species approximately decreased the color removal except Na^＋ and combination of Fe^2＋＋ HCO3^- . However, comparing with Fe^2＋ alone and HCO3^- alone, combination of Fe^2＋＋ HCO3^- increased the color removal.

关键词： chitosan Reactive Red 195 dye coagulation color removal

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配偶间HIV性传播危险因素研究

中国热带医学 2015年第4期15卷 430-433页

作者：蔡月仙余大年刘仲昌赵卫文台山市疾病预防控制中心广东台山529200

目的探讨台山市艾滋病配偶间传播率及其危险因素,为制定有效的艾滋病防治措施提供科学依据。方法筛查2012年6月~2014年8月可随访现住址台山的HIV确证阳性且有配偶的142对感染者或患者资料,对配偶间HIV抗体检测结果和高危行为进行追踪调... 详细信息

目的探讨台山市艾滋病配偶间传播率及其危险因素,为制定有效的艾滋病防治措施提供科学依据。方法筛查2012年6月~2014年8月可随访现住址台山的HIV确证阳性且有配偶的142对感染者或患者资料,对配偶间HIV抗体检测结果和高危行为进行追踪调查和分析。结果 HIV双阳率38.73%,单阳率61.27%。双阳组传播方和单阳组先感染方在性别、年龄、CD4细胞计数、抗病毒治疗、告知前安全套使用情况、性频次等方面的差异有统计学意义（P均〈0.05）;配偶告知后,75.86%HIV＂单阳家庭＂和69.09%＂双阳家庭＂的性行为频次减少,HIV＂单阳家庭＂夫妻间安全套使用率从告知前的14.94%上升到告知后的95.71%,＂双阳家庭＂从3.64%上升到56.86%;经Logistic回归分析结果显示：抗病毒治疗（OR=0.012,95%CI 0.001~0.225）和性频次（OR=248.066,95%CI 28.249~2 178.332）是影响配偶间HIV传播的主要因素。结论台山市配偶间HIV传播率较高,配偶告知可使配偶间性行为频次和安全套使用发生明显变化。配偶中先感染一方未接受抗病毒治疗和夫妻间性生活频次较高是夫妻间HIV传播的独立危险因素。

关键词：艾滋病性传播危险因素