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Simulation of an aircraft thermal management system based on vapor cycle response surface model

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Chinese Journal of Aeronautics 2024年第6期37卷 64-77页

作者： Haodong LIU Hongsheng JIANG sujun DONG Longxian XUE Yongji LIU Jianjun WU School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China Chengdu Aircraft Design and Research Institute Aviation Industry Corporation of ChinaChengdu 610091China

The modern aircraft Thermal Management System(TMS)faces significant challenges due to increasing thermal loads and limited heat dissipation *** optimize TMS during the conceptual design stage,the development of a modeling and simulation tool is *** this study,a TMS simulation model library was created using MATLAB/*** simplify the complexity of the Vapor Cycle System(VCS)model,a Response Surface Model(RSM)was constructed using the Monte Carlo method and validated through simulation *** the F-22 fighter TMS as an example,a thermal dynamic simulation model was constructed to analyze the variation of thermal response parameters in key subsystems and elucidate their coupling ***,the impact of total fuel flow and ram air flow on the TMS was *** findings demonstrate the existence of an optimal total fuel flow that achieves a balance between maximizing fuel heat sink utilization and minimizing bleed air *** adaptive distribution of fuel and ram air flow was found to enhance aircraft thermal management *** study contributes to improving modeling efficiency and enhancing the understanding of the thermal dynamic characteristics of TMS,thereby facilitating further optimization in aircraft TMS design.

关键词： Thermal management sys-tem Vaporcycle Response surface model Dynamic simulation MonteCarlo

Annealing Temperature-Dependent Luminescence Color Coordination in Eu-Doped AlN Thin Films

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Journal of Materials Science and Chemical Engineering 2024年第1期12卷 20-28页

作者： Yingda Qian Mariko Murayama sujun Guan Xinwei Zhao Department of Physics Tokyo University of Science Tokyo Japan Research Center for Space System Innovation Tokyo University of Science Chiba Japan

AlN was used as a host material and doped with Eu grown on Si substrate by pulsed laser deposition (PLD) with low substrate temperature. The X-ray diffraction (XRD) data revealed the orientation and the composition of the thin film. The surface morphology was studied by scanning electron microscope (SEM). While raising the annealing temperatures from 300˚C to 900˚C, the emission was observed from AlN: Eu under excitation of 260 nm excitation. The photoluminescence (PL) was integrated over the visible light wavelength shifted from the blue to the red zone in the CIE 1931 chromaticity coordinates. The luminescence color coordination of AlN: Eu depending on the annealing temperatures guides the further study of Eu-doped nitrides manufacturing on white light emitting diode (LED) and full color LED devices.

关键词： Low-Temperature PLD Growth Eu-Doped AlN Thin Film White Light Emitting Diode

Prevalence and risk evaluation of cardiovascular disease in the newly diagnosed prostate cancer population in China:A nationwide,multi-center,population-based cross-sectional study

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Chinese Medical Journal 2024年第11期137卷 1324-1331页

作者： Weiyu Zhang Huixin Liu Ming Liu Shi Ying Renbin Yuan Hao Zeng Zhenting Zhang sujun Han Zhannan Si Bin Hu Simeng Wen Pengcheng Xu Weimin Yu Hui Chen Liang wang Zhitao Lin Tao Dai Yunzhi Lin Tao Xu Department of Urology Peking University People’s HospitalBeijing 100044China Department of Clinical Epidemiology and Biostatistics Peking University People’s HospitalBeijing 100044China Department of Urology Beijing HospitalNational Center of GerontologyBeijing 100005China Institute of Geriatric Medicine Chinese Academy of Medical SciencesBeijing 100005China Department of Urology Wuhan Union HospitalHuazhong University of Science&TechnologyWuhanHubei 430022China Department of Urology The Third People’s Hospital of ChengduChengduSichuan 610014China Department of Urology West China Hospital of Sichuan UniversityChengduSichuan 610041China Department of Urologic Oncology Tianjin Medical University Cancer Institute&HospitalTianjin 300060China Department of Urology Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China National Cancer Center Beijing 100021China National Clinical Research Center for Cancer Beijing 100021China Department of Urology Liaoning Cancer HospitalShenyangLiaoning 110801China Department of Urology The Second Hospital of Tianjin Medical UniversityTianjin 300141China Tianjin Institute of Urology Tianjin Medical UniversityTianjin 300141China Department of Urology Lu’an Affiliated Hospital of Anhui Medical UniversityLu’anAnhui 237322China Department of Urology Renmin Hospital of Wuhan UniversityWuhanHubei 430060China Department of Urology Harbin Medical University Affiliated Cancer HospitalHarbinHeilongjiang 150081China Department of Urology The Second Hospital of Dalian Medical UniversityDalianLiaoning 116023China Department of Urology Surgery Fujian Cancer HospitalFuzhouFujian 350014China Department of Urology Surgery Hunan Cancer HospitalChangshaHunan 410031China Department of Urology Surgery The First Affiliated Hospital of Fujian Medical UniversityFuzhouFujian 350004China

Background:Cardiovascular disease(CVD)has emerged as the leading cause of death from prostate cancer(PCa)in recent decades,bringing a great disease burden *** with preexisting CVD have an increased risk for major adverse cardiovascular events when treated with androgen deprivation therapy(ADT).The present study aimed to explore the prevalence and risk evaluation of CVD among people with newly diagnosed PCa in ***:Clinical data of newly diagnosed PCa patients were retrospectively collected from 34 centers in China from 2010 to 2022 through convenience *** was defined as myocardial infarction,arrhythmia,heart failure,stroke,ischemic heart disease,and *** risk was estimated by calculating Framingham risk scores(FRS).Patients were accordingly divided into low-,medium-,and high-risk groups.χ2 or Fisher’s exact test was used for comparison of categorical ***:A total of 4253 patients were enrolled in the present study.A total of 27.0%(1147/4253)of patients had comorbid PCa and CVD,and 7.2%(307/4253)had two or more *** enrolled population was distributed in six regions of China,and approximately 71.0%(3019/4253)of patients lived in urban *** imaging and pathological evaluation,most PCa patients were diagnosed at an advanced stage,with 20.5%(871/4253)locally progressing and 20.5%(871/4253)showing *** of them initiated prostatectomy(46.6%,1983/4253)or regimens involving ADT therapy(45.7%,1944/4253)for prostate *** the present PCa cohort,43.1%(1832/4253)of patients had hypertension,and half of them had poorly controlled blood *** FRS stratification,as expected,a higher risk of CVD was related to aging and metabolic ***,we also found that patients with treatment involving ADT presented an originally higher risk of CVD than those without *** was in accordance with clinical practice,i.e.,aged patients or patients at advanced oncological stages were inclined to accept sys

关键词： Prostate cancer Castration Cardiovascular disease Prevalence Cardiovascular risk

建筑“光储直柔”系统中直流家用电器技术及标准进展研究

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太阳能学报 2024年第5期45卷 369-379页

作者：汪超贾潇雅赵鹏刘挺董素君王浚北京航空航天大学航空科学与工程学院北京100083 全国家用电器标准化技术委员会北京100037 中国家用电器研究院北京100037

随着能源革命的深入进行,用电终端也将迎来新的变革,建筑“光储直柔”系统中直流家用电器具备储用一体、直流、柔性等典型特征。该文围绕直流家用电器相关的技术和标准,梳理了国内外相关标准制定情况,依据上述研究构建了直流家用电器的... 详细信息

随着能源革命的深入进行,用电终端也将迎来新的变革,建筑“光储直柔”系统中直流家用电器具备储用一体、直流、柔性等典型特征。该文围绕直流家用电器相关的技术和标准,梳理了国内外相关标准制定情况,依据上述研究构建了直流家用电器的标准体系,并分析阻碍直流家用电器及相关领域产业化的核心技术,提出技术标准重点研究内容。最后对未来研究方向进行展望,以期为“光储直柔”直流家用电器的进一步深入研究、探索提供参考。

关键词：家用电器太阳能标准直流供电柔性用能光储直柔

基坑引起环境变形囊体扩张主动控制试验研究与工程应用

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土木工程学报 2022年第10期55卷 80-92页

作者：郑刚苏奕铭刁钰黄建友赵玉波王岁军陈昊天津大学建筑工程学院天津300072 天津大学滨海土木工程结构与安全教育部重点实验室天津300072 中国建筑第六工程局有限公司天津300000 中国建筑第五工程局有限公司湖南长沙410000

基坑工程引起的环境变形是其核心控制目标。目前广泛采用的被动控制技术,难以满足精细化变形控制的要求,尤其是邻近基坑的地铁隧道、高铁等所需的毫米级控制要求。针对上述问题,研究提出精细化囊体扩张实时主动控制技术。首先,开展囊体... 详细信息

基坑工程引起的环境变形是其核心控制目标。目前广泛采用的被动控制技术,难以满足精细化变形控制的要求,尤其是邻近基坑的地铁隧道、高铁等所需的毫米级控制要求。针对上述问题,研究提出精细化囊体扩张实时主动控制技术。首先,开展囊体扩张技术控制土体变形的原位试验,证明囊体扩张技术可以更好地对邻近土体实现定向、定位、定量的精准“靶向”变形控制,相比袖阀管注浆变形控制更准,控制效率更高。进一步,开展囊体扩张技术控制桩基、隧道变形的原位试验,验证囊体扩张技术可准确、高效地控制地下结构变形。单孔囊体扩张引起邻近土体、桩和隧道的变形均符合高斯曲线模式,对桩基、隧道变形的控制效率高达55.6%和69.2%。相对于传统变形被动控制技术,在变形控制能力、节约造价、工期等方面均有明显优势。最后,囊体扩张实时主动控制技术成功应用于邻近基坑地铁隧道的变形控制,不仅实时有效地控制了隧道变形,还取消了基坑分区开挖,缩短了工期,降低了造价,对类似工程具有借鉴指导意义。

关键词：囊体扩张主动控制原位试验基坑桩基隧道

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现代语境中净土宗的法门特征及其意义

青海社会科学 2011年第1期 111-114页

作者：王苏君绍兴文理学院人文学院

净土宗是中国佛教各宗派中最富有宗教色彩的一个宗派,也是真正扎根于民间的宗教信仰。净土宗之所以历经千余年而盛行不衰,信众甚多,这主要得益于净土宗自身的法门特征。净土法门的特征也就是净土宗的优势之所在。在某种意义上说,净土宗... 详细信息

净土宗是中国佛教各宗派中最富有宗教色彩的一个宗派,也是真正扎根于民间的宗教信仰。净土宗之所以历经千余年而盛行不衰,信众甚多,这主要得益于净土宗自身的法门特征。净土法门的特征也就是净土宗的优势之所在。在某种意义上说,净土宗是最具人性化的佛教宗派,念佛的人生是一种人性化和审美化的人生。

关键词：净土宗简易性世俗化生活化人性化

Evaluation and comparison of antibacterial activities of edible vegetable oils in China

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Oil Crop Science 2018年第1期3卷 57-62页

作者： Ruinan Yang sujun wang Liangxiao Zhang Xiupin wang Fei Ma Jin Mao Qi Zhang Peiwu Li Oil Crops Research Institute Chinese Academy of Agricultural Sciences Key Laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture Quality Inspection and Test Center for Oilseed Products Ministry of Agriculture Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources Laboratory of Quality and Safety Risk Assessment for Oilseed Products (Wuhan) Ministry of Agriculture Key Laboratory of Detection for Mycotoxins Ministry of Agriculture

To evaluate antibacterial activities of edible vegetable oils in China for healthy consumption, we investigated the antibacterial activities of extracts from 6 edible vegetable oils and rapeseed oils at different refining levels on 4 bactria (Staphylococcus aureus,Bacillus subtilis, Escherichia coli and Pseudomonas strains) by disc diffusion test. Results showed that camellia oil had considerable antibacterial activity against E. coli with antibacterial rate of 108.3%. Perilla oil, sunflower seed oil, and flaxseed oil showed the highest antibacterial activities against B. subtilis with the antibacterial rates of 108.3%, 102.8%and94.4%respectively. Moreover, the extracts of rapeseed oils obtained by different processing technologies showed significantly different antibacterial effects. Two crude oils and grade4 rapeseed oil showed antibacterial rates of more than 40%, whereas grade 1 and 2 rapeseed oils showed antibacterial rates of less than 20%. Therefore, it was recommended to use rapeseed oil rather than refined rapeseed oil because of higher antibacterial activities. It was suggested that proper refining processes should be taken to obtain the edible oils with higher antibacterial activities.

关键词： antibacterial activity edible oil crude oil refined rapeseed oil

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城镇化对消费需求影响的理论路径探讨

商业经济研究 2019年第14期 43-47页

作者：王素君四川省社会科学院眉山分院

城镇化是现代经济增长的重要推动力,是世界各国工业化进程中必然经历的历史阶段。城镇化是消费成为拉动经济发展的三驾马车之一的前提条件,是“经济发展为提高全民生活水平”这一终极目标的体现,因此,在经济发展中应注重消费的持续增长... 详细信息

城镇化是现代经济增长的重要推动力,是世界各国工业化进程中必然经历的历史阶段。城镇化是消费成为拉动经济发展的三驾马车之一的前提条件,是“经济发展为提高全民生活水平”这一终极目标的体现,因此,在经济发展中应注重消费的持续增长。基于此,本文在城镇化背景下对消费需求的发展进行分析,着重梳理中国城镇化的发展进程以及伴随该进程的消费需求演进过程,并进一步对这两者进行耦合研究,以期为我国城镇化与经济发展提供一定借鉴。

关键词：城镇化消费需求理论路径

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战斗机驾驶舱环境热舒适性仿真与优化

航空学报 2024年第7期45卷 122-133页

作者：刘钟琦胡旭阳罗海宁王晓明董素君北京航空航天大学航空科学与工程学院北京100191 航空工业成都飞机设计研究所成都610091

战斗机驾驶舱环境热舒适性是保障飞行员人机工效,确保战斗机发挥最佳作战性能的重要因素。但是,常用预期平均投票数-预期不满意百分数(PMV-PPD)人体热舒适性评价指标无法适用于驾驶舱内极度不均匀流场和温度场环境,驾驶舱环境热舒适性... 详细信息

战斗机驾驶舱环境热舒适性是保障飞行员人机工效,确保战斗机发挥最佳作战性能的重要因素。但是,常用预期平均投票数-预期不满意百分数(PMV-PPD)人体热舒适性评价指标无法适用于驾驶舱内极度不均匀流场和温度场环境,驾驶舱环境热舒适性缺乏有效优化设计手段。首先利用STAR-CCM+、TAITherm 2个软件,实现了驾驶舱内气流组织与Fiala人体生理模型和Berkeley热舒适评价指标的联合仿真功能;进一步以人体热舒适性和温度不均匀性系数为优化指标,采用遗传算法(GA)对驾驶舱多个送风口流量分配进行一定优化设计。与传统非耦合求解方法相比,联合仿真方法可有效提升驾驶舱内飞行员皮肤温度与热舒适性计算精度。与原始设计方案相比,优化后人体周围环境温度不均匀系数改善16%,整体热舒适性提升了0.285,占该档量化表阶梯的14%。同时,优化方案绝大部分局部热感受、热舒适性都有不同程度的改善。其中,头部和颈部改善最大,颈部热感受与热舒适性分别提高了0.55、0.781,分别占该档量化表阶梯的55%、39%。

关键词：驾驶舱热舒适性气流组织战斗机送风系统优化