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Numerical investigation on characteristics of interfacial wave of liquid film in gas-liquid two-phase flow using OpenFOAM

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Chinese Journal of Aeronautics 2024年第2期37卷 233-248页

作者： Xiaoqi MA Yueshe WANG jiaming tian State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049China

Liquid film cooling as an advanced cooling technology is widely used in space *** operation of liquid film along the rocket combustion inner wall is crucial for thermal protection of rocket *** stability of liquid film is mainly determined by the characteristics of interfacial wave,which is rarely investigated right *** to improve the stability of thin film has become a hot *** view of this,an advanced model based on the conventional Volume of Fluid(VOF)model is adopted to investigate the characteristics of interfacial wave in gas-liquid flow by using OpenFOAM,and the mechanism of formation and development of wave is revealed intuitively through numerical *** effects from gas velocity,surface tension and dynamic viscosity of liquid(three factors)on the wave are studied *** can be found that the gas velocity is critical to the formation and development of wave,and four modes of droplets generation are illustrated in this ***,a gas vortex near the gas-liquid interface can induce formation of wave easily,so changing the gas vortex state can regulate formation and development of ***’s more,the change rules of three factors influencing on the interfacial wave are obtained,and the surface tension has a negative effect on the formation and development of wave only when the surface tension coefficient is above the critical value,whereas the dynamic viscosity has a positive effect in this ***,the maximum height and maximum slope angle of wave will level off as the gas velocity ***,the maximum slope angle of wave is usually no more than 38°,no matter what happens to the three factors.

关键词： Interfacial wave Gas-liquid Two-phase flow VOF model OpenFOAM

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C_(60) as a metal-free catalyst for lithium-oxygen batteries

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Nano Research 2024年第5期17卷 3982-3987页

作者： Xinxin Zhang jiaming tian Yu Wang Shaohua Guo Yafei Li Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials School of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional MaterialsNational Laboratory of Solid State MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresFrontiers Science Center for Critical Earth Material CyclingNanjing UniversityNanjing 210023China

Carbon materials have shown significant potential as catalysts for lithium-oxygen batteries(LOBs).However,the intrinsic carbon sites are typically inert,necessitating extensive modifications and resulting in a limited density of active *** we present C_(60) as a metal-free cathode catalyst for LOBs,using density functional theory calculations and experimental *** lithiation reactions on the pristine carbon sites of C_(60) are energetically favorable due to its curvedπ-conjugation over the pentagon-hexagon *** kinetic analysis specifically reveals low energy barriers for Li_(2)O_(2) decomposition and Li diffusion on C_(60).Consequently,C_(60) exhibits significantly higher catalytic activity than typical carbon materials such as graphene and carbon *** electrochemical measurements validate the predictions,notably demonstrating that the intrinsic activity of C_(60) is comparable to that of noble metals.

关键词： lithium-oxygen batteries C_(60) density functional theory(DFT)calculations metal-free cathode

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安全壳内放射性气溶胶输运特性模拟研究

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核动力工程 2024年第2期45卷 88-95页

作者：田家铭王跃社李彪邹琳西安交通大学动力工程多相流国家重点实验室西安710049

为探明实际安全壳尺寸下严重事故中放射性气溶胶的输运特征,利用计算流体动力学和颗粒群平衡方程耦合,模拟了严重事故中放射性气溶胶在安全壳内的空间分布规律,并重点定量分析了不同聚并机制和沉积机制对于气溶胶输运过程的影响。结果表... 详细信息

为探明实际安全壳尺寸下严重事故中放射性气溶胶的输运特征,利用计算流体动力学和颗粒群平衡方程耦合,模拟了严重事故中放射性气溶胶在安全壳内的空间分布规律,并重点定量分析了不同聚并机制和沉积机制对于气溶胶输运过程的影响。结果表明,粒径小于0.1μm的气溶胶颗粒的相互作用主要受布朗聚并影响,粒径大于10μm的主要受湍流惯性聚并影响,粒径介于两者之间的受布朗聚并和湍流聚并(湍流惯性聚并和湍流剪切聚并)共同影响。对于沉积现象,粒径小于0.1μm的气溶胶主要受布朗扩散沉积影响,粒径大于0.1μm的主要受重力沉积影响。湍流聚并的平均聚并速度是布朗聚并速度的2.99倍,布朗扩散沉积的平均沉积速率是重力沉积的1.38倍。本研究为实际安全壳尺寸下放射性气溶胶去除技术的选取提供了解决思路。

关键词：安全壳气溶胶颗粒群平衡聚并沉积输运性质

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Antioxidant effects of the orientin and vitexin in Trollius chinensis Bunge in D-galactose-aged mice

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Neural Regeneration Research 2012年第33期7卷 2565-2575页

作者： Fang An Guodong Yang jiaming tian Shuhua Wang College of Pharmacy Hebei North UniversityZhangjiakou 075000Hebei ProvinceChina

Total flavonoids are the main pharmaceutical components of Trollius chinensis Bunge, and orientin and vitexin are the monomer components of total flavonoids in Trollius chinensis Bunge. In this study, an aged mouse model was established through intraperitoneal injection of D-galactose for 8 weeks, followed by treatment with 40, 20, or 10 mg/kg orientin, vitexin, or a positive control （vitamin E） via intragastric administration for an additional 8 weeks. Orientin, vitexin, and vitamin E improved the general medical status of the aging mice and significantly increased their brain weights. They also produced an obvious rise in total antioxidant capacity, superoxide dismutase, catalase, and glutathione peroxidase levels in the serum, and the levels of superoxide dismutase, catalase and glutathione peroxidase, Na＋-K＋-ATP enzyme, and Ca2＋-Mg2＋-ATP enzyme in the liver, brain and kidneys. In addition, they significantly reduced malondialdehyde levels in the liver, brain and kidney and lipofuscin levels in the brain. They also significantly improved the neuronal ultrastructure. The 40 mg/kg dose of orientin and vitexin had the same antioxidant capacity as vitamin E. These experimental findings indicate that orientin and vitexin engender anti-aging effects through their antioxidant capacities.

关键词： Trollius chinesis Bunge orientin vitexin total flavonoids in Trollius

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An Energy Trading Method Based on Alliance Blockchain and Multi-Signature

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Computers, Materials & Continua 2024年第2期78卷 1611-1629页

作者： Hongliang tian jiaming Wang College of Electrical Engineering Northeast Electric Power UniversityJilin132012China

Blockchain,known for its secure encrypted ledger,has garnered attention in financial and data transfer realms,including the field of energy ***,the decentralized nature and identity anonymity of user nodes raise uncertainties in energy *** broadcast consensus authentication slows transaction speeds,and frequent single-point transactions in multi-node settings pose key exposure risks without protective measures during user *** address these,an alliance blockchain scheme is proposed,reducing the resource-intensive identity verification among *** integrates multi-signature functionality to fortify user resources and transac-tion security.A novel multi-signature process within this framework involves neutral nodes established through central *** neutral nodes participate in multi-signature’s signing and verification,ensuring user identity and transaction content *** interactions among user nodes enhances transaction efficiency by minimizing communication overhead during verification and consensus *** assessments on reliability and operational speed highlight superior security performance,resilient against conventional attack *** shows that compared to traditional solutions,this scheme has advantages in terms of running *** conclusion,the alliance blockchain framework introduces a novel approach to tackle blockchain’s limitations in energy *** integrated multi-signature process,involving neutral nodes,significantly enhances security and *** scheme’s efficiency,validated through analytical assessments and simulations,indicates robustness against security threats and improved transactional *** research underscores the potential for improved security and efficiency in blockchain-enabled energy trading systems.

关键词： Alliance blockchain multi-signature energy trading security performance transaction efficiency

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3D打印技术融合多学科联动教学模式在《医学影像学》中的应用

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中国继续医学教育 2024年第15期16卷 1-5页

作者：田佳明刘明普杨宇王汉卿佳木斯大学附属第一医院医学影像中心黑龙江佳木斯154000 佳木斯大学机械工程学院黑龙江佳木斯154000 佳木斯大学医学部黑龙江佳木斯154000

目的探讨3D打印技术融合多学科联动教学模式在《医学影像学》教学中的应用效果。方法选取佳木斯大学2021级医学影像学专业本科生50名,按随机数表法分成传统教学组和革新教学组,每组各25名。传统教学组采用传统教学模式,革新教学组采用3... 详细信息

目的探讨3D打印技术融合多学科联动教学模式在《医学影像学》教学中的应用效果。方法选取佳木斯大学2021级医学影像学专业本科生50名,按随机数表法分成传统教学组和革新教学组,每组各25名。传统教学组采用传统教学模式,革新教学组采用3D打印技术融合多学科联动教学模式。比较2组的理论考核结果、读片考核结果以及教学效果。结果传统教学组和革新教学组的理论考核合格率分别为68.00%和96.00%,差异有统计学意义(P<0.05)。传统教学组和革新教学组读片考核合格率分别为64.00%和88.00%,差异有统计学意义(P<0.05)。在教学效果方面,传统教学组课程设计得分(6.36±1.63)分、知识面拓展得分(6.28±1.62)分、课堂氛围得分(6.44±1.33)分、学生满意度得分(7.36±1.32)分、知识掌握度得分(7.24±1.36)分、教学新颖性得分(7.20±1.19)分,革新教学组课程设计得分(7.84±1.55)分、知识面拓展得分(7.48±1.16)分、课堂氛围得分(7.80±1.29)分、学生满意度得分(8.56±1.26)分、知识掌握度得分(8.76±1.20)分、教学新颖性得分(9.12±0.93)分,差异均有统计学意义(P<0.05)。结论3D打印技术融合多学科联动教学模式可有效提高《医学影像学》的教学效果。

关键词： 3D打印技术多学科联动教学模式医学影像学教学效果教学模式教学模具

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CoSe_(2)/MoS_(2) Heterostructures to Couple Polysulfide Adsorption and Catalysis in Lithium-Sulfur Batteries

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Chinese Journal of Chemistry 2021年第5期39卷 1138-1144页

作者： Zihan Shen Qingwen Zhou Huiling Yu jiaming tian Man Shi Chaoquan Hu Huigang Zhang Notional Laboratory of Solid State Microstructures College of Engineering and Applied SciencesInstitute of Materials Engineeringand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjingJiangsu 210046China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Nanjing IPE Institute of Green Manufacturing Industry NanjingJiangsu 211100China

Lithium-sulfur batteries have been regarded as one of most promising next-generation energy storage devices because of their high energy density and low ***,polysulfide shuttling and slow kinetics hinder the practical *** fabricated hierarchically heterostructured CoSe_(2)/MoS_(2) nanoarrays on carbon clothes as the sulfur cathode *** resulting heterostructures facilitate electron conduction and improve electrolyte *** importantly,the composite heterostructures couple the strong poly-sulfide adsorption of CoSe_(2) and high catalytic activity of MoS_(2) to synergistically accelerate polysulfide conversion,demonstrating higher catalytic activity than their individual components.

关键词： Lithium-sulfur batteries Heterostructure Electrocatalyst CoSe_(2) MoS_(2)

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Mesenteric lymph reperfusion may exacerbate brain injury in a rat model of superior mesenteric artery occlusion shock

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Neural Regeneration Research 2010年第9期5卷 683-689页

作者： Zigang Zhao Chunyu Niu Aimin Shang jiaming tian Rui Han Chunhui Zhang Yuping Zhang Jing Zhang Institution of Microcirculation Department of Pathophysiology Basic Medical College Hebei North University Zhangjiakou 075029 HebeiProvince China

BACKGROUND：The intestinal lymphatic pathway and intestinal ischemia/reperfusion are mainly involved in mesenteric lymph duct ligation or drainage; moreover,intervention by reducing the lymph liquid reflux might relieve lung and other organ dysfunction induced by intestinal ischemia/reperfusion; however,research addressing mesenteric lymph reperfusion （MLR） and brain injury has not yet to be ***：To observe the effect of MLR on brain tissue in a rat model of superior mesenteric artery occlusion （SMAO） shock,and to explore the molecular mechanism of ***,TIME AND SETTING：A randomized,controlled,animal experiment at a neuro-pathophysiology level was performed at the Institute of Microcirculation,Hebei North University; Department of Pathophysiology,Basic Medical College; Department of Pathology,the First Hospital of Hebei North University between December 2007 and March ***：Adenosine triphosphate （ATP） standard was provided by the National Institute for the Control of Pharmaceutical and Biological Products; lactic acid （LA）,superoxide dismutase （SOD）,malonaldehyde （MDA）,nitrogen monoxidum （NO）,nitric oxide synthase （NOS）,myeloperoxidase （MPO） and ATPase assay kits were provided by Nanjing Jiancheng Bioengineering Institute,***：A total of 24 male Wistar rats were randomly divided into four *** the sham-surgery group （n = 6）,both the mesenteric lymph duct and the superior mesenteric artery were not blocked; in the MLR group （n = 6）,the mesenteric lymph duct was occluded for 1 hour followed by 2-hour reperfusion; in the SMAO group （n = 6）,the superior mesenteric artery was occluded for 1 hour followed by 2-hour reperfusion; in the MLR ＋ SMAO group （n = 6）,both the mesenteric lymph duct and superior mesenteric artery were occluded for 1 hour followed by 2-hour *** OUTCOME MEASURES：Mean arterial blood pressure prior to and following ischemia/reperfusion; brain tissue morphology levels of LA,MDA,SOD,NO,NOS,MPO,ATPas

关键词： mesenteric lymph reperfusion shock superior mesenteric artery occlusion brain injury neural regeneration

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Influence of mesenteric lymph reperfusion on neurotransmitter expression in brain tissue of a superior mesenteric artery occlusion shock rat model

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Neural Regeneration Research 2010年第11期5卷 859-863页

作者： Chunyu Niu Zigang Zhao Aimin Shang jiaming tian Chunhui Zhang Rui Han Yuping Zhang Jing Zhang Institution of Microcirculation Hebei North University Zhangjiakou 075029 Hebei Province China

BACKGROUND： Previous studies have shown that mesenteric lymph reperfusion （MLR） exacerbates brain injury in a rat model of superior mesenteric artery occlusion （SMAO） shock. However, little is known about the influence of MLR on neurotransmitter expression in brain tissue. OBJECTIVE： To observe the effect of MLR on brain tissue injury by measuring monoamine and cholinergic neurotransmitter levels. DESIGN, TIME AND SETTING： A randomized, controlled, animal experiment was performed at the Institute of Microcirculation, Hebei North University, China; Research Room of Microcirculation and Laboratory of Biochemistry, Department of Pathophysiology, Basic Medical College, Hebei North University between December 2007 and March 2009. MATERIALS： Choline acetyltransferase （CHAT） and acetylcholine esterase （ACHE） kits were provided by Nanjing Jiancheng Bioengineering Institute, China; dopamine （DA） and noradrenalin （NE） standards were provided by the National Institute for the Control of Pharmaceutical and Biological Products; HP1100 chromatograph of liquid was provided by Agllent, USA. METHODS： A total of 24 male, Wistar rats were randomly assigned to 4 groups： sham-surgery, MLR SMAO, and MLR ＋ SMAO groups, with 6 rats in each group. In the MLR or SMAO groups, the mesenteric lymph duct or superior mesenteric artery was blocked for 1 hour. In the MLR ＋ SMAO group, the mesenteric lymph duct and superior mesenteric artery were occluded for 1 hour, followed by 2-hour repeffusion. ChAT and AChE levels were measured using the synthesized and hydrolyzed acetylcholine method, respectively. Liquid chromatography was employed to quantitatively analyze DA and NE levels, using relative retention time and the external standard method. MAIN OUTCOME MEASURES： CHAT, ACHE, DA, and NE levels. RESULTS： AChE levels were significantly increased, but ChAT levels were significantly decreased in the MLR and MLR ＋ SMAO groups following 2-hour repeffusion （P〈 0.01）. However, AChE activity in the MLR ＋

关键词： mesenteric lymph reperfusion shock superior mesenteric artery occlusion brain neurotransmitter neural regeneration

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3D打印技术融合多学科联动教学模式在骨科影像教学中的研究

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黑龙江医药科学 2024年第5期47卷 13-15页

作者：王汉卿田佳明刘明普杨宇孙玉鸿佳木斯大学附属第一医院医学影像中心黑龙江佳木斯154003 佳木斯大学机械工程学院机械工程实验中心黑龙江佳木斯154007 佳木斯大学医学部黑龙江佳木斯154002 佳木斯大学附属第一医院检验科黑龙江佳木斯154003

目的:探讨3D打印技术融合多学科联动教学模式在骨科影像教学中的应用效果。方法:选取佳木斯大学2022级临床医学专业本科生64名,其中男34名,女30名,随机分成两组,每组32名,男女比例相同。由相同教师对两组同学进行授课,传统教学组采用多... 详细信息

目的:探讨3D打印技术融合多学科联动教学模式在骨科影像教学中的应用效果。方法:选取佳木斯大学2022级临床医学专业本科生64名,其中男34名,女30名,随机分成两组,每组32名,男女比例相同。由相同教师对两组同学进行授课,传统教学组采用多媒体传统教学方式,创新教学组采用3D打印技术融合多学科联动教学模式的新教学方法,对比两组学生在读片考核以及教学效果考核的差异。结果:在读片考核方面,两组成绩比较,差异有统计学意义(P<0.05)。教学效果考核方面,传统教学组理解能力得分(7.12±1.27)分、学习兴趣得分(5.69±1.28)分、提升实践技能得分(7.14±1.42)分、教学满意度得分(6.73±1.37)分及教学新颖性得分(6.57±1.46)分;创新教学组理解能力得分(8.41±1.12)分、学习兴趣得分(7.51±1.35)分、提升实践技能得分(8.21±1.40)分、教学满意度得分(8.75±1.30)分及教学创新性得分(8.92±1.31)分,两组比较,差异均有统计学意义(P<0.05)。结论:3D打印技术融合多学科联动教学模式可以激发学生的学习兴趣,提高学习成绩,扩展教学思维。

关键词： 3D打印技术多学科联动教学模式骨科影像教学

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