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Multi-Fidelity Simulation of Gas Turbine Overall Performance by Directly Coupling High-Fidelity Models of Multiple Rotating Components

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Journal of Thermal Science 2024年第4期33卷 1357-1378页

作者： deng weimin XU Yibing NI Ming WEI Zuojun GAN Xiaohua REN Guangming Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen518055China School of Aerospace Engineering Tsinghua UniversityBeijing100084China Shenzhen Key Laboratory of Wide-Speed-Range and Variable-Density Continuous Wind Tunnel Shenzhen Science and Technology Innovation CommitteeShenzhen518000China

Multi-fidelity simulations incorporate computational fluid dynamics(CFD) models into a thermodynamic model,enabling the simulation of the overall performance of an entire gas turbine with high-fidelity *** iterative coupled methods rely on characteristic maps,while fully coupled methods directly incorporate high-fidelity ***,fully coupled methods face challenges in simulating rotating components,including weak convergence and complex *** address these challenges,a fully coupled method with logarithmic transformations was developed to directly integrate high-fidelity CFD models of multiple rotating *** developed fully coupled method was then applied to evaluate the overall performance of a KJ66 micro gas turbine across various off-design *** developed fully coupled method was also compared with the traditional iterative coupled ***,experimental data from ground tests were conducted to verify its *** convergence history indicated that the proposed fully coupled method exhibited stable convergence,even under far-off-design *** experimental verification demonstrated that the multi-fidelity simulation with the fully coupled method achieved high accuracy in off-design *** analysis revealed inherent differences in the coupling methods of CFD models between the developed fully coupled and traditional iterative coupled *** inherent differences provide valuable insights for reducing errors between the component-level model and CFD models in different coupling *** developed fully coupled method,introducing logarithmic transformations,offers more realistic support for the detailed and optimal design of high-fidelity rotating components within the overall performance platform of gas turbines.

关键词： multi-fidelity fully coupled method iterative coupled method gas turbine component-level model

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针刺对干眼兔角膜形态学及角膜组织NF-κB信号通路的影响

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眼科新进展 2024年第3期44卷 173-177页

作者：丁宁韦庆波刘成勇邓伟民徐倩高卫萍南京中医药大学江苏省南京市210008 南京中医药大学附属医院江苏省南京市210029 东南大学附属中大医院江苏省南京市210029

目的探讨针刺对干眼兔角膜形态学及角膜组织NF-κB信号通路的影响,分析针刺对干眼的作用机制。方法取雌雄不拘的健康新西兰兔24只,随机分为空白组、模型组、针刺组、假针刺组,每组6只。空白组为正常对照组,不加任何处理;其余3组动物每... 详细信息

目的探讨针刺对干眼兔角膜形态学及角膜组织NF-κB信号通路的影响,分析针刺对干眼的作用机制。方法取雌雄不拘的健康新西兰兔24只,随机分为空白组、模型组、针刺组、假针刺组,每组6只。空白组为正常对照组,不加任何处理;其余3组动物每天800、 1100、1400和1800时于皮下注射氢溴酸东莨菪碱2.0 mg·kg-1,连续35 d直至实验结束。假针刺组:于造模后第22天给予假针刺治疗(睛明BL1、攒竹BL2、丝竹空SJ23、太阳穴EX-HN5、瞳子髎GB1),钝针头点刺穴位,不刺进穴位,每天1次,连续14 d。针刺组:于造模成功后第22天给予针刺治疗,穴位同假针刺组。造模后第0、21、28、35天分别进行角膜荧光素染色,第35天进行角膜共焦显微镜检查,之后处死动物,在光学显微镜、透射电子显微镜下观察角膜形态学变化,采用Western blot检测角膜组织NF-κB蛋白的表达。结果与模型组相比,造模后第28、35天,针刺组、空白组兔角膜荧光素染色评分均减小,差异均有统计学意义(均为P<0.05)。造模后第35天共焦显微镜检查结果显示,模型组和假针刺组与其他组相比,兔角膜基质层出现大量球状免疫细胞和边界不清大小不规律的活化基质层细胞,可见具有不规则细胞间间隙的区域,存在炎症;针刺组基质层细胞形态得到改善,细胞呈轻微激活状态,角膜神经形态未见明显异常。造模后第35天光学显微镜检查结果显示,模型组和假针刺组兔角膜组织表面可见角化过度的扁平上皮细胞,淋巴细胞浸润,局灶上皮细胞层数增多,表面上皮细胞脱落;针刺组角膜上皮有接近4~6层上皮细胞,上皮脱落减少,与模型组相比,淋巴细胞浸润减少。造模后第35天透射电子显微镜检查结果显示,模型组和假针刺组兔角膜上皮细胞出现异常的微绒毛结构和上皮细胞缺失,细胞间隙增宽,粗面内质网严重扩张,桥粒解体伴随线粒体肿胀;针刺组上皮细胞微绒毛结构稀疏且短,仍见局部缺失,粗面内质网轻度扩张,线粒体未见明显肿胀。造模后第35天Western blot检测结果显示,与空白组相比,模型组、假针刺组p-NF-κB p65表达均上调(均为P<0.05);与模型组、假针刺组相比,针刺组p-NF-κB p65表达均下调(均为P<0.05)。结论针刺可以抑制NF-κB信号通路从而发挥抗炎作用,改善兔干眼模型角膜炎症和损伤。

关键词：针刺干眼角膜形态学 NF-κB信号通路

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经后增殖方对控制性超促排卵大鼠卵巢GDF9分泌及颗粒细胞凋亡的影响

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实用医学杂志 2024年第7期40卷 918-923页

作者：杨贞江少如陈小燕陈晓琳邓伟民郭新宇揭阳市人民医院广东揭阳522000 中国人民解放军南部战区总医院广州510010 前海人寿广州总医院广州511325

目的观察益气血法经后增殖方通过p38MAPK/CK2/IκBα/NF-κB通路对控制性超促排卵(COH)大鼠卵巢GDF9分泌及颗粒细胞(GCs)凋亡的影响。方法建立COH大鼠模型,18只大鼠随机分为自然排卵组(NO组)、COH组、COH+经后增殖方组(COH+JHZZG组)。qR... 详细信息

目的观察益气血法经后增殖方通过p38MAPK/CK2/IκBα/NF-κB通路对控制性超促排卵(COH)大鼠卵巢GDF9分泌及颗粒细胞(GCs)凋亡的影响。方法建立COH大鼠模型,18只大鼠随机分为自然排卵组(NO组)、COH组、COH+经后增殖方组(COH+JHZZG组)。qRT-PCR和Western blot法检测p38MAPK、CK2、IκBα、NF-κB、GDF9 mRNA和蛋白的表达水平,TUNEL法检测卵巢GCs凋亡率。结果与NO组比较,COH组大鼠卵巢组织p38MAPK、NF-κB表达升高,CK2、IκBα、GDF9表达下降,卵巢GCs凋亡率升高,差异有统计学意义(P<0.01);与COH组比较,COH+JHZZG组大鼠卵巢组织p38MAPK、NF-κB表达下降,CK2、IκBα、GDF9表达升高,差异有统计学意义(P<0.01);卵巢GCs凋亡率下降,差异有统计学意义(P<0.05)。结论益气血法经后增殖方通过p38MAPK/CK2/IκBα/NF-κB通路促进COH大鼠卵巢GDF9的分泌,抑制卵巢GCs的凋亡,从而提高COH卵细胞质量。

关键词：经后增殖方控制性超促排卵 p38MAPK NF-κB GDF9 细胞凋亡

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益气血法调节GDF9、c-IAP1/2、JNK1/2、TNFR1/2表达对超排卵大鼠卵巢颗粒细胞凋亡的影响

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现代中西医结合杂志 2024年第14期33卷 1905-1910,2026页

作者：杨贞邓林浩江少如陈小燕郭新宇邓伟民揭阳市人民医院广东揭阳522000 南部战区总医院广东广州510010 前海人寿广州总医院广东广州511325

目的观察益气血法经后增殖方含药血清基于p38 MAPK/核转录因子-κB(NF-κB)信号通路调节生长分化因子9(GDF9)、细胞凋亡抑制蛋白1/2(c-IAP1/2)、c-Jun氨基末端激酶1/2(JNK1/2)、肿瘤坏死因子受体1/2(TNFR1/2)表达对控制性超排卵大鼠卵... 详细信息

目的观察益气血法经后增殖方含药血清基于p38 MAPK/核转录因子-κB(NF-κB)信号通路调节生长分化因子9(GDF9)、细胞凋亡抑制蛋白1/2(c-IAP1/2)、c-Jun氨基末端激酶1/2(JNK1/2)、肿瘤坏死因子受体1/2(TNFR1/2)表达对控制性超排卵大鼠卵巢颗粒细胞凋亡的影响。方法取12只雌性大鼠,随机分为控制性超排卵+中药组(6只大鼠给予经后增殖方4.5 g/kg灌胃)和控制性超排卵组(6只大鼠给予等体积生理盐水灌胃),后续经腹腔注射醋酸曲普瑞林、孕马血清促性腺激素、HCG后,取2组大鼠腹主动脉血制备含药血清和空白血清。另取15只雌性大鼠,经腹腔注射醋酸曲普瑞林、孕马血清促性腺激素、HCG后,收集卵巢颗粒细胞,分别与空白血清(空白血清组)、含药血清(含药血清组)、含药血清+GDF9抗体(含药血清+GDF9抗体组)在体外共同培养。TUNEL检测卵巢颗粒细胞凋亡率,qRT-PCR法检测卵巢颗粒细胞中p38 MAPK、NF-κB、GDF9、c-IAP1、c-IAP2、JNK1、JNK2、TNFR1、TNFR2 mRNA表达情况,Western blot法检测卵巢颗粒细胞中GDF9蛋白表达情况。结果含药血清组和含药血清+GDF9抗体组细胞凋亡率均明显低于空白血清组(P均<0.05),且含药血清组明显低于含药血清+GDF9抗体组(P<0.05)。含药血清组p38 MAPK、NF-κB mRNA相对表达量均明显低于空白血清组(P均<0.05)。含药血清组和含药血清+GDF9抗体组c-IAP1、c-IAP2、GDF9 mRNA相对表达量和GDF9蛋白相对表达量均明显高于空白血清组(P均<0.05),且含药血清组均明显高于含药血清+GDF9抗体组(P均<0.05);含药血清组和含药血清+GDF9抗体组JNK1、JNK2、TNFR1、TNFR2 mRNA相对表达量均明显低于空白血清组(P均<0.05),且含药血清组均明显低于含药血清+GDF9抗体组(P均<0.05)。结论益气血法经后增殖方可通过调控p38 MAPK/NF-κB信号通路,上调控制性超排卵大鼠卵巢颗粒细胞中GDF9、c-IAP1、c-IAP2的表达,下调JNK1、JNK2、TNFR1、TNFR2的表达,抑制卵巢颗粒细胞凋亡。

关键词：益气血法生长分化因子9 细胞凋亡抑制蛋白 c-Jun氨基末端激酶肿瘤坏死因子受体

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Progress in the application of polymer fibers in solid electrolytes for lithium metal batteries

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Journal of Energy Chemistry 2024年第5期92卷 26-42页

作者： Junbao Kang Nanping deng Bowen Cheng weimin Kang State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes School of Textile Science and EngineeringTiangong UniversityTianjin 300387China

Solid state lithium metal batteries(SSLMBs)are considered to be one of the most promising battery systems for achieving high energy density and excellent safety for energy storage in the ***,current existed solid-state electrolytes(SSEs)are still difficult to meet the practical application requirements of *** this review,based on the analysis of main problems and challenges faced by the development of SSEs,the ingenious application and latest progresses including specific suggestions of various polymer fibers and their membrane products in solving these issues are emphatically ***,the inherent defects of inorganic and organic electrolytes are pointed ***,the application strategies of polymer fibers/fiber membranes in strengthening strength,reducing thickness,enhancing thermal stability,increasing the film formability,improving ion conductivity and optimizing interface stability are discussed in detail from two aspects of improving physical structure properties and electrochemical ***,the researches and development trends of the intelligent applications of high-performance polymer fibers in SSEs is *** review intends to provide timely and important guidance for the design and development of polymer fiber composite SSEs for SSLMBs.

关键词： Composite solide lectrolytes Polymer fibers Solid-state lithium metal batteries Solid-stateel ectrolytes Nanofiber membranes

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知识图谱赋能基础医学教育的实践

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中华医学教育杂志 2024年第7期44卷 513-516页

作者：于骊邓为民张士杰墨晶温克闫景瑞天津医科大学基础医学院计算机教研室天津300070 天津医科大学基础医学院教学办公室天津300070 天津医科大学基础医学院药理学系天津300070 天津医科大学基础医学院病理学教研室天津300070

目的以自行开发的基础医学教育阶段核心课程知识图谱为工具,探索知识图谱赋能基础医学教育阶段课程教学的效果。方法将基础医学教育阶段核心课程知识图谱从2022年1月起开放给天津医科大学2020级临床医学类专业259名学生,在学科教师的引... 详细信息

目的以自行开发的基础医学教育阶段核心课程知识图谱为工具,探索知识图谱赋能基础医学教育阶段课程教学的效果。方法将基础医学教育阶段核心课程知识图谱从2022年1月起开放给天津医科大学2020级临床医学类专业259名学生,在学科教师的引导下,以此为辅助学习工具学习6个月,并以该级次学生为试验组,以未使用过知识图谱的2018级同类专业248名学生为对照组,对两组学生参加的由天津医科大学组织的基础医学教育阶段核心课程综合考核成绩进行比较,使用Mann-Whitney U检验进行数据分析。结果试验组学生的总成绩[84.0(79.7,88.0)]分,高于对照组学生的[69.0(59.5,78.0)]分,以逻辑推理为主的题型,试验组学生成绩[67.6(55.5,79.7)]分,高于对照组学生的[61.1(54.3,73.6)]分,其差异均具有统计学意义(均P<0.05)。结论知识图谱能够帮助临床医学类专业学生提高基础医学核心课程学习效果,增强学生的逻辑推理能力。

关键词：计算机辅助教学知识图谱基础医学教育数字化教学

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基础医学教育阶段核心课程知识图谱的构建与应用

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中华医学教育杂志 2024年第3期44卷 176-179页

作者：闫景瑞邓为民张士杰墨晶温克于骊天津医科大学基础医学院教学办公室天津300070 天津医科大学基础医学院药理学系天津300070 天津医科大学基础医学院病理学教研室天津300070 天津医科大学基础医学院计算机教研室天津300070

在医学生的培养过程中,基础医学教育阶段学生的学习效率和个性化学习是亟需关注的问题。知识图谱能够表达知识间复杂逻辑关系的本质特征,为解决这些问题提供了方法。为了提升学生的学习效率和学习效果,满足个性化学习的需求,本文基于树... 详细信息

在医学生的培养过程中,基础医学教育阶段学生的学习效率和个性化学习是亟需关注的问题。知识图谱能够表达知识间复杂逻辑关系的本质特征,为解决这些问题提供了方法。为了提升学生的学习效率和学习效果,满足个性化学习的需求,本文基于树结构,采用领域专家的方式构建模式和关系,进行数据提取、数据精炼和数据融合,在超星学习平台上构建了基础医学教育阶段核心课程知识图谱。本文介绍了基础医学教育阶段核心课程知识图谱的构建过程,并在天津医科大学2021级申请转专业的45名学生中加以应用,结果表明,经常使用知识图谱的学生的笔试成绩[(177.7±23.3)分]高于不经常使用的学生[(147.9±20.3)分],其差异具有统计学意义(P<0.001)。知识图谱能够帮助学生随时随地进行学习,有助于提高学生的学习效率和学习效果,并为个性化学习提供了支持。

关键词：计算机辅助教学知识图谱基础医学教育构建应用

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Anti-CD44 mAb remodels biological behaviors of spheroid cells with stemness from human ovarian cancer cell line SKOV-3

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Chinese Science Bulletin 2012年第11期57卷 1288-1297页

作者： GU Chao DU YongRui GAO Yan YAO Zhi GU Xin ZHANG QiuYue XU JingJing deng weimin Tianjin Key Laboratory of Cellular and Molecular Immunology Tianjin Medical UniversityTianjin 300070China Department of Gynecology Tianjin Central Gynecology and Obstetrics HospitalTianjin 300100China

There is accumulating evidence that cancer stem cells (CSCs) play an important role in tumor progression. Novel strategies targeting CSCs have been widely researched. In the present study, we explored whether such CSCs existed in human ovarian cancer (OVCA) cell line and whether anti-CD44 antibody had effects on such subpopulation. We isolated and identified spheroid cells from SKOV-3. Then we used A3D8, an anti-CD44 mAb to treat spheroid cells with so-called "stemness". Effects of A3D8 on spheroid cells' biological behaviors were examined. Our findings showed that there was a small subpopulation that had so-called "stemness" in SKOV-3 cell line. Against spheroid cells, A3D8 can (1) inhibit cell proliferation; (2) change cell cycle distribution and expression of p21, CDK2 and cyclinA; (3) enhance cisplatin (DDP)-induced apoptosis; (4) promote cell differentiation; (5) inhibit clone formation efficiency; (6) reduce invasive efficacy; (7) inhibit tumorigenicity. Thus, to sum up points which we have just showed, spheroid cells isolated from SKOV-3 can be used as an appropriate in vitro model for relevant study of human ovarian CSCs. And our results reasoned that anti-CD44 therapy may become a potential promising strategy for OVCA treatment.

关键词：单克隆抗体生物学行为 CD44 体细胞细胞株卵巢癌人类干性

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Advanced preparation and application of bimetallic materials in lithium-sulfur batteries:A review

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Journal of Energy Chemistry 2024年第1期88卷 469-512,I0011页

作者： Yongbing Jin Nanping deng Yanan Li Hao Wang Meiling Zhang weimin Kang Bowen Cheng State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes School of Textile Science and EngineeringTiangong UniversityTianjin 300387China

Lithium-sulfur(Li-S)batteries are considered highly promising as next-generation energy storage systems due to high theoretical capacity(2600 Wh kg^(-1))and energy density(1675 mA h g^(-1))as well as the abundant natural reserves,low cost of elemental sulfur,and environmentally friendly ***,several challenges impede its commercialization including low conductivity of sulfur itself,the severe“shuttle effect”caused by lithium polysulfides(LiPSs)during charge–discharge processes,volume expansion effects and sluggish reaction *** a solution,polar metal particles and their compounds have been introduced as the main hosts for sulfur cathode due to their robust catalytic activity and adsorption capability,effectively suppressing the“shuttle effect”of Li *** alloys and their compounds with multi-functional properties exhibit remarkable electrochemical performance more readily when compared to single-metal ***-designed bimetallic materials demonstrate larger specific surface areas and richer active sites,enabling simultaneous high adsorption capability and strong catalytic *** synergistic effect of the“adsorption-catalysis”sites accelerates the adsorptiondiffusion-conversion process of Li PSs,ultimately achieving a long-lasting Li-S ***,the latest progress and performance of bimetallic materials in cathodes,separators,and interlayers of Li-S batteries are systematically ***,the principles and challenges of Li-S batteries are briefly ***,various mechanisms for suppressing“shuttle effects”of Li PSs are emphasized at the ***,the performance parameters of various bimetallic materials are comprehensively summarized,and some improvement strategies are proposed based on these ***,the future prospects of bimetallic materials are discussed,with the hope of providing profound insights for the rational design and manufacturing of high-performance bimetallic materia

关键词： Bimetallic materials Lithium-sulfur batteries Effectively suppress shuttle effect of LiPSs Significantly improve reaction kinetics Exceptionally long lifespan

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3D core-shell nanofibers framework and functional ceramic nanoparticles synergistically reinforced composite polymer electrolytes for high-performance all-solid-state lithium metal battery

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Chinese Chemical Letters 2024年第8期35卷 425-432页

作者： Hengying Xiang Nanping deng Lu Gao Wen Yu Bowen Cheng weimin Kang State Key Laboratory of Separation Membranes and Membrane Processes Tiangong UniversityTianjin 300387China School of Textile Science and Engineering Tiangong UniversityTianjin 300387China

Satisfactory ionic conductivity,excellent mechanical stability,and high-temperature resistance are the prerequisites for the safe application of solid polymer electrolytes(SPEs)in all-solid-state lithium metal batteries(ASSLMBs).In this study,a novel poly(m-phenylene isophthalamide)(PMIA)-core/poly(ethylene oxide)(PEO)-shell nanofiber membrane and the functional Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO)ceramic nanopar-ticle are simultaneously introduced into the PEO-based SPEs to prepare composite polymer electrolytes(CPEs).The core PMIA layer of composite nanofibers can greatly improve the mechanical strength and thermal stability of the CPEs,while the shell PEO layer can provide the 3D continuous transport channels for lithium *** addition,the introduction of functional LLZTO nanoparticle not only reduces the crys-tallinity of PEO,but also promotes the dissociation of lithium salts and releases more Li^(+)ions through its interaction with the Lewis acid-base of anions,thereby overall improving the transport of lithium ***,the optimized CPEs present high ionic conductivity of 1.38×10^(−4)S/cm at 30℃,signifi-cantly improved mechanical strength(8.5 MPa),remarkable thermal stability(without obvious shrinkage at 150℃),and conspicuous Li dendrites blocking ability(>1800 h).The CPEs also both have good com-patibility and cyclic stability with LiFePO_(4)(>2000 cycles)and high-voltage LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)(NMC811)(>500 cycles)*** addition,even at low temperature(40℃),the assembled LiFePO4/CPEs/Li bat-tery still can cycle *** novel design can provide an effective way to exploit high-performance solid-state electrolytes.

关键词： Composite polymer electrolytes Core-shell structured nanofiber Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)ceramic nanoparticle All-solid-state lithium metal batteries Outstanding thermal stability and electrochemical performance

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