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Combustor design and performance prediction based on parametric model

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航空动力学报 2014年第4期29卷 748-754页

作者： LI Feng SHANG Shou-tang guo rui-qing CHENG Ming TANG Zheng-fu SONG Bo School of Energy and Power Engineering Beijing University of Aeronautics and Astronautics Combustion Design Office Shenyang Engine Design and Research InstituteAviation Industry Corporation of China

By combining the three-dimensional model software and grid generation software,the combustor parametric model and high quality and high speed gridding in the full flow field has been *** on the research of the parametric modeling,an optimizing design,CFD analysis and performance prediction of the combustor have been accomplished,and the rule of the combustor performance variation with structural parameters was *** results show that the combustor capability has no significant change with the radial swirler parameters and the primary holes *** combustor capability has significant change with position and profile of the primary holes and dilution holes,and the combustor outlet temperature profile and emission change greatly when the total hole area of the burnerinnerliner *** parametric model method is helpful to provide a fast design method for the aero-engine combustor design.

关键词：经验模型航空动力设计涡旋设计航空设计

AT1 receptor in rostral ventrolateral medulla mediating blunted baroreceptor reflex in spontaneously hypertensive rats

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Acta Pharmacologica Sinica 2004年第11期 49-54页

作者： Xin-ya GAO, Feng ZHANG, Ying HAN, Han-jun WANG, Ying ZHANG, rui guo, guo-qing ZHUDepartment of Physiology, Nanjing Medical University, Nanjing 210029, China

AIM: To determine the role of AT 1 receptor in the rostral ventrolateral medulla (RVLM) in mediating the blunted baroreceptor reflex in spontaneously hypertensive rats (SHR). METHODS: Intravenous injections of graded doses of phenylephrine (1, 5, 10, 20, and 40 μg/kg) increased the blood pressure to elicit the baroreceptor reflex in both SHR and normotensive Wistar rats anesthetized with urethane. The baroreceptor reflex sensitivity (BRS) was determined before and after microinjection of Ang Ⅱ, losartan, or AT1 receptor antisense oligodeoxynucleotides into the RVLM. AT1 receptor protein level in the RVLM was measured by Western blotting. RESULTS: The BRS was significantly decreased in SHR compared with normal rats. Bilateral microinjection of AT1 receptor antagonist losartan (250 nmol/h) into the RVLM partly reversed the blunted BRS in SHR, but had no significant effect on the BRS in normal rats. Ang Ⅱ (1.5 nmol/h) significantly inhibited the BRS in normal rats, which was completely abolished by pretr

关键词： angiotensin Ⅱ antisense oligodeoxynucleotide hypertension baroreceptor reflex rostral ventrolat-eral medulla

The linear self-attracting diffusion driven by the weighted-fractional Brownian motion II: The parameter estimation

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Science China Mathematics 2025年

作者： Litan Yan rui guo Wenyi Pei Department of Statistics College of Science Donghua University School of Statistics and Mathematics Zhejiang Gongshang University

Let Ba,bbe a weighted-fractional Brownian motion with Hurst indexes a and b such that a>-1and 0≤b<1∧（1+a）.In this paper,we consider the linear self-attracting diffusion ■ interacting diffusion (see Cranston and Le Jan （1995）).Under the continuous observation,we study asymptotic ■ converges in distribution to the sum of the chi-square random variable with 1 degree of freedom and the random variable Z1a,b.

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基于中心分级的高温升燃烧室性能预估

航空动力学报 2014年第5期29卷 1001-1007页

作者：尚守堂高贤智郭瑞卿郭大鹏高伟伟李锋北京航空航天大学能源与动力工程学院北京100191

针对高推质比航空发动机高温升燃烧室的需求,提出一种中心分级燃烧室的设计方案,在保证与现有单环腔燃烧室扩压器尺寸、外机匣最大直径及燃烧室出口尺寸相同的情况下,对设计模型进行了三维数值模拟,并与现有的单环腔燃烧室数值模拟结果... 详细信息

针对高推质比航空发动机高温升燃烧室的需求,提出一种中心分级燃烧室的设计方案,在保证与现有单环腔燃烧室扩压器尺寸、外机匣最大直径及燃烧室出口尺寸相同的情况下,对设计模型进行了三维数值模拟,并与现有的单环腔燃烧室数值模拟结果及试验结果进行了对比分析.研究结果表明:采用中心分级燃烧室,在获得更高温升的同时,可获得比单环腔燃烧室更高的总压恢复系数和比单环腔燃烧室更低的燃烧室出口温度分布系数(OTDF),其慢车工况下的CO排放和NO排放略高于单环腔燃烧室;在设计总油气比为0.045的情况下,温升可达1360K,总压恢复系数大于等于0.96,OTDF小于等于0.14,出口径向温度分布系数(RTDF)小于等于0.10,燃烧效率大于等于0.987.

关键词：高温升燃烧室中心分级燃烧室单环腔燃烧室燃烧室性能预估燃烧数值模拟

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夏玉米光合特性及光响应曲线拟合

植物生态学报 2016年第12期40卷 1310-1318页

作者：李力张祥星郑睿郭建青长安大学环境科学与工程学院西安710054 旱区地下水文与生态效应教育部重点实验室西安710054

通过对光合-光响应曲线的研究来探索光合有效辐射与净光合速率的关系是一种非常重要的手段。合适的模型才能较好地反映植株的光合特性。分析由于生育期与叶位的不同而导致各模型拟合值与实测值差异的变化性以及不同光合有效辐射强度下... 详细信息

通过对光合-光响应曲线的研究来探索光合有效辐射与净光合速率的关系是一种非常重要的手段。合适的模型才能较好地反映植株的光合特性。分析由于生育期与叶位的不同而导致各模型拟合值与实测值差异的变化性以及不同光合有效辐射强度下各模型的适用性,可为夏玉米(Zea mays)光合模型的选择和光合-光响应曲线模型的进一步优化提供参考。该研究运用3种典型的光合模型对夏玉米大喇叭口期与乳熟期上部叶、穗位叶与下部叶做光合-光响应曲线拟合,对比各模型的拟合度以及对实测数据的反映情况,并将光合有效辐射分为3段,分析3种模型在每段的拟合残差。结果表明:最大净光合速率(P_(nmax))、饱和光强(I_(sat))、暗呼吸速率(R_d)等光合特征参数值随叶位由上而下呈降低趋势,乳熟期普遍小于大喇叭口期;不同生育期和叶位3种模型均可以拟合,直角双曲线模型、非直角双曲线模型对P_(nmax)、I_(sat)的拟合值与实测值有一定的偏差;通过残差分析表明叶子飘模型的拟合值与实测值最为相符,尤其对高光部分的拟合表现出独有的优越性。

关键词：光合特征参数叶子飘模型饱和光强残差

Ancient Art Retains Splendor in New Era

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China Today 2025年第1期74卷 74-75页

作者： guo qing 不详

With government support,more young people are studying Thangka art,securing its innovative *** 1,300-year-old Thangka art,religious painting on woven material,has been lauded as an illustrated encyclopedia of Tibetan *** unique artistic and cultural value earned it a place on China’s intangible cultural heritage list in *** institution tasked with preserving and developing this ancient art is the Tibet Academy of Thangka(TAT)in *** focuses on the Mansar School of Thangka *** can observe the whole process of creating a Mansar Thangka piece,from sketching to adding the final touch.

关键词： religious earned sketch

China-India: Ties that Bind

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China Today 2025年第1期74卷 59-61页

作者： guo qing 不详

From international student to professor,Tripathi Mani shares his thoughts on Chinese and Indian cultures and the beneficial exchanges between *** Vivek Mani first learned about China from bedtime stories told by his father,a Sanskrit teacher in rural Bihar,a state in east *** of the stories were about the Chinese monk Xuanzang’s adventures during his long journey to India to find Buddhist *** kindled the young boy’s interest in China and the desire to visit it one day.

关键词： India Indian desire

Li,Na,and Cs-based metal-organic frameworks for room temperature phosphorescence applications

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Science China Chemistry 2025年

作者： Jiaqi Ma rui Feng Yanyuan Jia Mingshi Zhang Shuo guo College of Chemistry and Chemical Engineering Inner Mongolia University School of Materials Science and Engineering Smart Sensing Interdisciplinary Science Center Nankai University & TKL of Metal and Molecule Based Material Chemistry Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University Department of Chemistry and Biochemistry University of California San Diego

The conventional design of metal-organic frameworks (MOFs) with room-temperature phosphorescence (RTP) mostly relies on using heavy metals,as the heavy atom effect can effectively increase the efficiency of intersystem crossing (ISC) to get a better phosphorescence *** the first time,we reported the highly efficient RTP of a lithium-based MOF IMU-101 with a lifetime (τ) of 299 ms and a quantum yield (QY) of 4.91%.In addition,MOFs IMU-102 and IMU-103,with sodium and cesium as metal nodes,were successfully *** phosphorescence properties of this series of alkali metal MOFs were systematically studied and *** crystallography and computational calculation show that the mechanism for achieving RTP for this material lies in the ultrashort coordination bond of Li,which enables the reduction of non-radiative ***-101,as a cheap and environmentally friendly room-temperature phosphorescent material,has been further developed into composite polymer inks and bulk *** makes them promising for applications in anti-counterfeiting and information encryption.

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类比模型在侦查实践中的应用研究

山西警察学院学报 2018年第4期26卷 86-88页

作者：郭睿青山西警察学院山西太原030401

类比模型在侦查工作中具有广泛的应用前景。文章首先分析了侦查类比推理的类型和侦查实践过程中类比模型所需要经历的步骤,然后构建侦查类比模型,并研究模糊类比模型在实际侦查案例中的应用效果。最后还阐述了类比模型的一些具体特征。

关键词：类比模型侦查侦破