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Large eddy simulation of boundary layer combustion of hydrogen and hydrocarbon fuel films in a modeled scramjet combustor

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Chinese Journal of Aeronautics 2024年第7期37卷 109-133页

作者： jianfei WEI Silong ZHANG Jingying ZUO Xin LI Jiang QIN wen BAO School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China

Supersonic fuel film cooling is a promising way to simultaneously reduce the severe wall heat and friction load of the internal passage in a scramjet engine when operating at hypersonic *** eddy simulations were performed to investigate the cooling and wall friction characteristics of hydrogen and hydrocarbon films under inert and reactive *** results show that the essential difference of the turbulent state in the mixing layer contributes to the totally different behaviors of the cooling and wall friction reduction performances of the two fuel *** turbulent transport processes between the hydrogen film and the mainstream are much weaker as compared to the case of hydrocarbon film,making inert hydrogen rather superior in cooling and friction reduction ***,the increase of wall temperature for hydrogen film under the inert case is mainly driven by the loss of hydrogen with high heat capacity instead of by direct heat ***,the film cooling performance severely deteriorates when the hydrogen film burns due to presence of severe heat release sources near the *** the other hand,combustion of hydrocarbon film in the boundary layer can remarkably improve its originally barely-satisfactory cooling and friction reduction performance to the level comparable to that of hydrogen film,due to the suppression of turbulent transport processes in the mixing layer and presence of heat absorption sources near the ***,the hydrogen film is more advantageous in friction reduction,while the hydrocarbon film is more suitable for cooling.

关键词： Supersonic film cooling Hydrogen Hydrocarbon Boundary layer combustion Large eddy simulation

Total body irradiation of donors can alter the course of tolerance and induce acute rejection in a spontaneous tolerance rat liver transplantation model

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Science China(Life Sciences) 2012年第9期55卷 774-781页

作者： ZHANG YeWei ZHAO HeWei BO Lin YANG YinXue LU Xiang SUN JingFeng wen jianfei HE Xia YIN Guowen Department of Hepatobiliary and Pancreatic Surgery Affiliated Jiangsu Cancer Hospital of Nanjing Medical UniversityNanjing 210009China Department of Rheumatism and Immunology Affiliated No.2 Hospital of Suzhou UniversitySuzhou 215000China Department ofGeneral Surgery Affiliated Hospital of Ningxia Medical UniversityYinchuan 750004China Department of Geriatrics The Second Affiliated Hospital of Nanjing Medical UniversityNanjing 210011China Department of Radiotherapy Affiliated Jiangsu Cancer Hospital of Nanjing Medical UniversityNanjing 210009China Department of lnterventional Affiliated Jiangsu Cancer Hospital of Nanjing Medical UniversityNanjing 210009China

Liver transplantation is an established therapy for end-stage liver diseases. Graft rejection occurs unless the recipient receives immunosuppression after transplantation. This study aimed to explore the mechanism of acute rejection of liver allografts in rats pre-treated with total body irradiation to eliminate passenger lymphocytes and to define the role of CD4＋CD25＋ regulatory T cells in the induction of immunotolerance in the recipient. Male Lewis rats were used as donors and male DA rats were re- cipients. Rats were randomly assigned to the following four groups： control group, homogeneity liver transplantation group, idio-immunotolerance group and acute rejection group. After transplantation, the survival time of each group, serum alanine aminotransferase, total bilirubin levels, number of Foxp3＋CD4＋CD25＋ regulatory T cells, expression of glucocorticoid-induced tumor necrosis factor receptor on T cell subgroups, histopathology of the hepatic graft and spleen cytotoxic T lymphocyte lytic activity were measured. In the acute rejection group, where donors were preconditioned with total body in＇adiation before liver transplantation, all recipients died between day 17 and day 21. On day 14, serum alanine aminotransferase increased signifi- cantly to （459.2±76.9） U L^- 1, total bilirubin increased to （124.1±33.7） μmol L-1 （P〈0.05） and the ratio of Foxp3＋CD4＋CD25＋ regulatory T cells decreased significantly to 1.50%±0.50% （P〈0.05） compared with the other groups. Analysis of the T cell subpopulations in the acute rejection group varied from the other groups. Histological analysis showed typical changes of acute rejection in the acute rejection group only. Preconditioning of the donors with total body irradiation eliminated passenger lymphocytes of the liver graft, and thus affected the course of tolerance and induced acute rejection after liver transplantation.

关键词： liver transplantation immune tolerance Foxp3+ regulatory T cell GITR

Effects of Epstein-Barr virus infection on the development of multiple myeloma after liver transplantation

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Science China(Life Sciences) 2012年第8期55卷 735-743页

作者： ZHANG YeWei ZHAO HeWei HE Xia ZHENG Suwen WANG TaiHong YAN DongLiang SUN JingFeng LU Xiang wen jianfei LAU Wan Yee Department of Hepatobiliary and Pancreatic Surgery Affiliated Jiangsu Cancer Hospital of Nanjing Medical UniversityNanjing 210009China Department of Radiotherapy Affiliated Jiangsu Caneer Hospital of Nanjlng Medical University Nanjing 210009China Department of General surgery The Second Affiliated Hospital of Nantong University Nantong 226001China Departimen of Geriatrics The Second Affiliated Hospital of Nanjing Medical UniversityNanjing 210011China Faculty of Medicine The Chinese University of Hong KongPrince of Wales HospitalShatinHong KongChina

Reduced cellular immune function in patients after liver transplantation easily results in many types of viral infections,such as Epstein-Barr ***-Barr virus is a γ-herpesvirus and is related to many malignant diseases,especially epithelial and lymph *** abnormal interaction of cluster of differentiation 40 with cluster of differentiation 40 ligand and expression of cluster of differentiation 40 ligand are considered closely related to the development of myeloma *** study explored the influence and mechanism of Epstein-Barr virus infection on the phenotype and biological behavior of myeloma cells after liver *** cytometry was used to detect coexpression of cluster of differentiation 40 and cluster of differentiation 40 ligand in 10 samples of freshly isolated multiple myeloma *** of differentiation 40 and cluster of differentiation 40 ligand were coexpressed in sample Nos.5,8,9,and 10,particularly in sample *** blot analysis was used to detect the expression of the Epstein-Barr virus antigens latent membrane protein 1 and Epstein-Barr virus nuclear antigen 2 in the multiple myeloma cell line RPMI 8226 infected with Epstein-Barr *** antigen expression indicated that Epstein-Barr virus can infect multiple myeloma virus cells in *** transcription-polymerase chain reaction revealed upregulated expression of cluster of differentiation 40 ligand on the infected RPMI 8226 cells,which may be involved in the anti-apoptosis activity of the infected *** microscopy showed that pairs of molecules of cluster of differentiation 40,cluster of differentiation 40 ligand,and latent membrane protein 1 were colocalized on the surface of the infected *** chemokine receptor 4 was upregulated on the RPMI 8226 cells after Epstein-Barr virus *** migratory ability of the infected cells improved in the presence of the chemokine stromal cell-derived factor-1α.Anti-apoptosis and migration are k

关键词： liver transplantation CD40 CD40L multiple myeloma EBV

基于人工智能算法的自主导航车轨迹跟踪控制方法

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智能计算机与应用 2020年第5期10卷 155-157页

作者：温剑飞冠达睿投(北京)科技发展有限公司人工智能研究院北京100000

传统方法对自主导航车轨迹跟踪控制精准度较低,为此本文针对基于人工智能算法的自主导航车轨迹跟踪控制方法进行研究,运用网络技术建立自主导航车轨迹跟踪模型,对导航地图中所有车辆轨迹加以模拟,利用人工智能算法中的蛙跳算法对模型进... 详细信息

传统方法对自主导航车轨迹跟踪控制精准度较低,为此本文针对基于人工智能算法的自主导航车轨迹跟踪控制方法进行研究,运用网络技术建立自主导航车轨迹跟踪模型,对导航地图中所有车辆轨迹加以模拟,利用人工智能算法中的蛙跳算法对模型进行计算,得出自主导航车的最优轨迹,实现了对自主导航车轨迹的跟踪控制。经试验证明,基于人工智能算法的自主导航车轨迹跟踪控制方法具有较高的精准度。

关键词：人工智能算法自主导航车轨迹跟踪控制方法蛙跳算法

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大容量弹载数据记录器的设计与实现

电子器件 2016年第4期39卷 951-956页

作者：温建飞岳凤英李永红中北大学计算机与控制学院太原030051 中北大学仪器与电子学院太原030051

提出了一种大容量弹载数据记录器的设计方案,该方案主要完成3路高速图像数据的接收,每个通道的数据带宽为每秒150 Mbyte/s,存储容量为128 Gbyte。设计选用Xilinx公司的FPGA作为主控制器,完成对高速数据的接收,缓存和存储。接收单元采用F... 详细信息

提出了一种大容量弹载数据记录器的设计方案,该方案主要完成3路高速图像数据的接收,每个通道的数据带宽为每秒150 Mbyte/s,存储容量为128 Gbyte。设计选用Xilinx公司的FPGA作为主控制器,完成对高速数据的接收,缓存和存储。接收单元采用FPGA内部集成的高速串行收发器RocketIO GTP,单个链路的数据接收速率为3.125 Gbyte/s;缓存单元采用两片DDR2 SDRAM芯片对接收到的高速数据进行乒乓缓存;存储单元采用32片NAND FLASH构成存储阵列,对缓存后的数据进行存储。同时,该记录器能够对存储的数据进行事后读取并进行分析。

关键词：大容量高速 RocketIO GTP DDR2 SDRAM 乒乓缓存

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论表演创作的艺术变形

民族艺术研究 2001年第1期14卷 68-70页

作者：温鉴非云南艺术学院戏剧系

艺术来源于生活，但不等于还原于生活。表演艺术创作，是相当复杂的精神活动，既有客观影响，亦有主观想象，无论从演员对生活素材和艺术形象的感知过程，还是从演员创作的主观意识或从演员的审美活动过程，以及从演员自身条件等方面进... 详细信息

艺术来源于生活，但不等于还原于生活。表演艺术创作，是相当复杂的精神活动，既有客观影响，亦有主观想象，无论从演员对生活素材和艺术形象的感知过程，还是从演员创作的主观意识或从演员的审美活动过程，以及从演员自身条件等方面进行分析，都存在变形的因素。因而，艺术变形是艺术创作的高级心理现象，是艺术再创造过程，是表演形象创造的必然规律，它对演员的表演创作心理，具有极其重要的影响和价值。

关键词：演员表演创作艺术创作表演艺术艺术形象生活素材再创造艺术变形形象创造想象

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论演员的职业性喉病

民族艺术研究 2001年第4期14卷 69-73页

作者：温鉴非云南艺术学院戏剧系

演员的职业性喉病是其艺术生命的天敌。为什么有人会出现声带小结或喉肌无力呢 ?职业性的声带小结和喉肌弱症同我们的教学以及发声方法有无关系 ?如何对职业性喉病进行防治 ?这是每一个从事表演艺术创作工作的人 ,都必须关心和认真研究... 详细信息

演员的职业性喉病是其艺术生命的天敌。为什么有人会出现声带小结或喉肌无力呢 ?职业性的声带小结和喉肌弱症同我们的教学以及发声方法有无关系 ?如何对职业性喉病进行防治 ?这是每一个从事表演艺术创作工作的人 ,都必须关心和认真研究的重要课题。演员的职业性疾患———“声带小结”与“喉疾弱症”是因用声方法错误所至 ,发病后及时去医院医治是必要的 ,但却不是根治的办法 ,如果继续延用错误的用声方法 ,疾患虽经治愈 ,不久将还会复发。所以 ,只有掌握正确的用声方法 ,才是根治和预防职业性病患———“声带小结”与“喉肌弱症”的根本措施。

关键词：职业性错误课题关心办法教学发声方法演员艺术生命表演艺术

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简谐基础加速度激励下的点阵结构优化设计

航空学报 2024年第5期45卷 306-316页

作者：陈立曾孝云黄文张建飞中国工程物理研究院机械制造工艺研究所绵阳621900

航空航天类产品面临愈加剧烈的振动环境,同时对结构的设计也提出了更高的轻量化需求。针对简谐基础加速度激励下的结构振动抑制问题,基于高比强度、比刚度的轻质点阵结构,提出通过优化点阵结构杆件的截面尺寸来降低结构动响应的优化方... 详细信息

航空航天类产品面临愈加剧烈的振动环境,同时对结构的设计也提出了更高的轻量化需求。针对简谐基础加速度激励下的结构振动抑制问题,基于高比强度、比刚度的轻质点阵结构,提出通过优化点阵结构杆件的截面尺寸来降低结构动响应的优化方法。以点阵结构杆件的截面尺寸为设计变量,结构体积为约束,建立简谐基础加速度激励下结构关键点处位移响应最小为优化目标的优化数学模型。采用模态位移法高效求解结构动响应及灵敏度,并通过GCMMA优化算法实现优化问题求解。数值算例和振动实验表明所提出的点阵结构优化方法在保证结构轻量化的同时,能够大幅度降低结构的振动响应。

关键词：简谐基础加速度激励点阵结构动响应结构优化模态位移法

不同运动模式体育课对小学男生体成分及心肺功能的影响

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中国学校卫生 2018年第5期39卷 662-665页

作者：闻剑飞王强滚军军合肥师范学院体育科学学院安徽230601

目的探讨体育课中不同运动心率曲线模式对小学生体成分、心肺功能的影响,以期为科学制定体育教学环节、增进学生健康提供参考。方法以合肥市某小学五、六年级的4个班级72名男生为研究对象,平均分为对照组(CG)、中强度持续运动心率曲线组... 详细信息

目的探讨体育课中不同运动心率曲线模式对小学生体成分、心肺功能的影响,以期为科学制定体育教学环节、增进学生健康提供参考。方法以合肥市某小学五、六年级的4个班级72名男生为研究对象,平均分为对照组(CG)、中强度持续运动心率曲线组(MG)、中强度重复运动心率曲线组(RG)、递增负荷间歇运动心率曲线组(IIG),分别进行每周3次,每次持续20 min,共16周实验干预,比较实验前后体成分、心肺功能相关指标。结果与实验前相比,经16周运动干预后各组受试者身高、体重均增加(P值均0.05);MG组、RG组、IIG组的体脂百分比均明显降低(P值均<0.05)。实验后与CG组相比,MG组、RG组、IIG组体重、BMI增加幅度明显下降(P值均<0.05),且IIG组下降幅度最为明显;MG组、RG组、IIG组的体脂百分比低于CG组(P值均<0.05)。与实验前相比,各组受试者肺活量均增加(P值均<0.01),MG组、RG组、IIG组的肺活量体重指数、每分钟最大摄氧量明显增加(P值均<0.05)。实验后IIG组的肺活量增加幅度明显高于CG组,MG组、RG组、IIG组的肺活量体重指数、每分钟最大摄氧量增加幅度明显高于CG组(P值均<0.05)。结论经16周运动干预,不同运动心率曲线模式体育课均可以改善小学生体成分和心肺功能水平,尤其在递增负荷间歇运动心率曲线模式下效果最为显著。

关键词：身体成份体育运动学生男性肺心率