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The Influence of Two Kinds of El Ni?o Events on the Strong Tropical Cyclone Generation and Strength in the Pacific Ocean

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Journal of Ocean University of China 2018年第5期17卷 1011-1018页

作者： WANG Xingchi HAN Shuzong WANG Xin dong yujie College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China

This paper focuses on the effects of two types of El Nino events on tropical cyclone activity. We classified El Nino events from 1961 to 2015 according to their sea surface temperature （SST） anomalies into an eastern type and a central type. Then we selected strong tropical cyclones to statistically analyze the tropical cyclone characteristics during different events and their effects, as well as to study the possible mechanisms related to thermodynamic and dynamic factors. The tropical cyclone generation areas were found to be very similar during the two kinds of events. The average number of tropical cyclone in the eastern event is more than that in central event, and the hurricane in northeastern Pacific （HNP） has more energy than the typhoon in northwestern Pacific （TNP） in all cases. The seasonal distribution of the TNP high-incidence centers during central El Nifio events is opposite to that of the HNP. The TNP accumulated cyclone energy （ACE） intensity is similar in the fall and summer, and the HNP ACE intensity in the summer is greater than that in the fall. The SSTs are consistent with the TNP and HNP movement trends. The Walker circulation intensity was strongly affected by the eastern events, but it quickly returned to its normal state, while the intensity was slightly reduced in the central events, and it slowly returned to its normal state. The vertical velocity distributions in the Pacific are different at different stages of both events, and the distributions of vertical velocity anomalies for typhoons and hurricanes are consistent.

关键词： El Nino events strong tropical cyclones sea surface temperature anomaly Walker circulation

Molecular crystals based on 9,10-distyrylanthracene derivatives with high solid state fluorescence efficiency and uniaxial orientation induced by supramolecular interactions

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Chinese Science Bulletin 2013年第22期58卷 2747-2752页

作者： CHEN JinLong MA SuQian XU Bin ZHANG JiBo dong yujie TIAN WenJing State Key Laboratory of Supramolecular Structure and Materials Jilin University

Two 9,10-distyrylanthracene (DSA) derivatives CNDSA and t-BUDSA were designed and synthesized, and their photophysical properties and crystal structures were investigated. Compared to DSA, the maximum emission peaks of the two compounds showed red-shift not only in THF solution, but also in crystals, because the introduction of electron-withdrawing substituents to DSA leads to more dispersion of the electrons in the molecules. The two crystals of CNDSA and t-BUDSA show strong fluores- cence with the efficiency F of 45% and 33%, respectively, which may be resulted from no obvious-interactions between molecules inside the crystal due to the large distance between the two adjacent molecules and nearly no overlap between the central anthracene planes. The analysis of crystal structures of the two compounds indicated that the molecules are arranged in the same conformation and orientation in their crystals, i.e. uniaxially oriented packing crystal, because of the supramolecular interac- tion of CH/ in the two crystals and additional C-H···N interactions in CNDSA.

关键词：超分子相互作用分子晶体晶体取向荧光效率衍生物单轴吸电子取代基晶体结构分析

A cyanostilbene-based molecule with aggregation-induced emission properties: amplified spontaneous emission, protonation effect and electroluminescence

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Science China Chemistry 2019年第2期62卷 212-219页

作者： yujie dong Suqian Ma Xiaoyu Zhang Jingyu Qian Nianyong Zhu Bin Xu Cheuk-Lam Ho Wenjing Tian Wai-Yeung Wong Institute of Molecular Functional Materials and Department of Chemistry Hong Kong Baptist University State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology College of Chemical Engineering Zhejiang University of Technology State Key Laboratory of Supramolecular Structure and Materials Jilin University Department of Applied Biology & Chemical Technology The Hong Kong Polytechnic University

A terpyridine-substituted cyanostilbene derivative(Z)-2-(4′-([2,2′:6′,2″-terpyridin]-4′-yl)-[1,1′-biphenyl]-4-yl)-3-phenylacrylonitrile(CNSTPy) was synthesized and characterized. The compound exhibits remarkable aggregation-induced emission phenomenon and its single crystal shows a blue emission with fluorescent efficiency as high as 45%. Based on its aggregation state behavior, multiple applications towards exploring its lasing, fluorescence switching and electroluminescence properties were realized. Amplified spontaneous emission(ASE) was observed from the crystal and verified by the variable pump strip method, with a threshold value of ～1.5 m J cm^(-2). The protonation/deprotonation processes accompanied by the formation of different molecular aggregation structure result in the distinct blue and yellow emissions. Additionally, the molecule also shows a moderate electroluminescence performance.

关键词： aggregation-induced emission cyanostilbene amplified spontaneous emission protonation effect

Pd-catalyzed cascade cyclization of allenylethylene carbonates and indandiones: Synthesis of tetracyclic dihydrocyclopentaindenofuranone derivatives

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Chinese Chemical Letters 2023年第10期34卷 131-134页

作者： yujie dong Jun Liu Xing Gao Ting Pan Biming Mao Songcheng Yu Yongjun Wu Cheng Zhang Hongchao Guo Department of Chemistry and Innovation Center of Pesticide Research China Agricultural UniversityBeijing 100193China College of Public Health Zhengzhou UniversityZhengzhou 450001China

A palladium-catalyzed cascade cyclization of allenylethylene carbonates with 1,3-indandiones was developed, providing biologically interesting tetracyclic dihydrocyclopentaindenofuranone derivatives having three contiguous quaternary carbon centers in moderate to high yields with excellent diastereoselectivities. In this reaction, the allene moiety was fully fused into the cyclopentene ring.

关键词： Palladium Allenylethylene carbonates Indandiones Cascade cyclization Decarboxylation

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自然循环熔盐球床堆中间换热器的优化设计

清华大学学报（自然科学版） 2018年第5期58卷 445-449页

作者：薛春辉董玉杰清华大学核能与新能源技术研究院先进反应堆工程与安全教育部重点实验室

核热泉堆是一种熔盐球床概念设计堆,具有满功率自然循环特性,中间换热器一次侧是一回路中除堆芯外主要的阻力来源。为降低中间换热器的阻力,提高换热效率,采用计算流体力学方法（CFD）对中间换热器单元流道的流动及其传热特性进行数值模... 详细信息

核热泉堆是一种熔盐球床概念设计堆,具有满功率自然循环特性,中间换热器一次侧是一回路中除堆芯外主要的阻力来源。为降低中间换热器的阻力,提高换热效率,采用计算流体力学方法（CFD）对中间换热器单元流道的流动及其传热特性进行数值模拟,并构建换热器翅片阻力因子、Colburn因子和综合评价因子的响应面,利用多目标遗传算法对翅片的尺寸进行优化设计,并根据优化后的翅片尺寸基于Aspen软件进行换热器优化设计。优化后的换热器体积减小了30%。

关键词：中间换热器熔盐球床堆多目标优化设计计算流体力学方法(CFD)

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熔盐球床堆径向流堆芯的热工水力分析

核动力工程 2018年第1期39卷 12-16页

作者：薛春辉董玉杰清华大学核能与新能源技术研究院先进反应堆工程与安全教育部重点实验室北京100084

核热泉(NHS)堆是一种新型熔盐球床概念设计堆,其冷却剂径向流过堆芯,具有满功率自然循环特性。基于多孔介质局部非热平衡模型,利用计算流体力学(CFD)通用软件Fluent计算核热泉堆径向流堆芯的热工水力特性,并比较了不同的内、外孔板开孔... 详细信息

核热泉(NHS)堆是一种新型熔盐球床概念设计堆,其冷却剂径向流过堆芯,具有满功率自然循环特性。基于多孔介质局部非热平衡模型,利用计算流体力学(CFD)通用软件Fluent计算核热泉堆径向流堆芯的热工水力特性,并比较了不同的内、外孔板开孔率的影响。结果表明,内孔板开孔率对冷却剂流量分布影响较大;燃料中心温度具有相当的安全裕量,冷却剂横向流过堆芯的阻力远低于浮升力,能够实现全回路的自然循环。

关键词： CFD 多孔介质熔盐球床堆

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中世纪英国暴君暴政的理论和实际

首都师范大学学报（社会科学版） 2009年第S1期 127-132页

作者：董玉洁首都师范大学历史学院

中世纪英国有着丰富的关于暴君暴政的观念,它们与古典时代和中世纪整个西欧的相关观念是密切相连的;暴君暴政观念既表现出对暴君暴政的否定与批判,又表现出一定程度的容忍和默认。有关暴君暴政的观念,是以深厚的社会政治经济生活为基础... 详细信息

中世纪英国有着丰富的关于暴君暴政的观念,它们与古典时代和中世纪整个西欧的相关观念是密切相连的;暴君暴政观念既表现出对暴君暴政的否定与批判,又表现出一定程度的容忍和默认。有关暴君暴政的观念,是以深厚的社会政治经济生活为基础的,是现实生活的观念反映,英国暴君暴政的实际情况,为此提供了很好的注解。

关键词：暴君暴政中世纪英国

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论“精神赡养”实践理论的转向

中州学刊 2019年第3期 93-99页

作者：董玉节尤吾兵安徽中医药大学马克思主义学院合肥230012

"精神赡养"是一种高级赡养形式。传统孝道理论、德性理论和唯理性道德理论应用于现代老年人口"精神赡养"实践产生了一定的困境。关怀伦理作为一种新兴的道德理论,因其自身的理论特点而具有聚合性、柔性和过程性等理论品质。关怀伦理应... 详细信息

"精神赡养"是一种高级赡养形式。传统孝道理论、德性理论和唯理性道德理论应用于现代老年人口"精神赡养"实践产生了一定的困境。关怀伦理作为一种新兴的道德理论,因其自身的理论特点而具有聚合性、柔性和过程性等理论品质。关怀伦理应用于指导老年人口"精神赡养",可以很好聚合各种关怀主体、精准供给情感和规约关怀全过程,彰显出实践指导意义的合宜性。鉴于此,关怀伦理应用于指导"精神赡养"实践可以看作是理论转向的探索。

关键词：精神赡养关怀伦理孝道

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球床式高温堆堆芯气固两相流耦合模拟研究

哈尔滨工程大学学报 2022年第12期43卷 1743-1749页

作者：严安孙喜明董玉杰清华大学核能与新能源技术研究院北京100084

针对球床式高温气冷堆球床堆芯稠密气固两相流的热工问题,本文应用计算流体力学耦合离散单元方法进行了建模与分析。应用离散单元方法,模拟了球床堆芯420000个燃料球体在重力驱动下的随机堆积过程,分析了堆积密度的空间分布。应用计算... 详细信息

针对球床式高温气冷堆球床堆芯稠密气固两相流的热工问题,本文应用计算流体力学耦合离散单元方法进行了建模与分析。应用离散单元方法,模拟了球床堆芯420000个燃料球体在重力驱动下的随机堆积过程,分析了堆积密度的空间分布。应用计算流体力学耦合离散单元方法,结合经验关系式及物性参数模型,建立了高温堆球床堆芯的三维耦合模型,实现了球床式高温气冷堆平衡堆稳态工况模拟。通过球床式高温气冷堆全堆芯流-固-热耦合模拟计算,分析了堆芯的热工特性,得到了氦气温度、球体表面温度等重要热工参数的分布。对比分析了THERMIX与计算流体力学耦合离散单元方法不同模型的堆芯出口中心温度;曳力模型的选取对于球床压降计算结果有影响。结果表明:基于三维CFD-DEM框架的多物理场耦合模拟结果与已有的系统分析软件结果基本一致。该研究可为后续高温堆热工设计和分析软件开发提供思路。

关键词：高温气冷堆球床式反应堆离散单元法计算流体力学堆积密度温度分布压降分布曳力模型