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Loads Analysis of Flanges of a Transonic and Supersonic Wind Tunnel Wide Angle Diffuser

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International Journal of Plant Engineering and Management 2012年第2期17卷 125-128页

作者： chen Jian-bing WANG rui CAI Qing-qing GAO Xin-yu China Aerodynamics Research and Development Center Mianyang 621000P. R. China

Compared with general circular flanges, flanges on conical shells have different configurations. In the Chinese national code GBISO, however, there are no related contents about flange design of this kind of type. So, it needs to study loads of flanges of this kind of type. This paper takes the flange connection of a wide angle diffuser in a transonic and supersonic wind tunnel as the background, according to the principles of flange design in Chinese national code GB150, combining the characteristics of flanges of a wide angle diffuser, the loads of flanges have been analyzed, and the equations of loads and their locations have been presented.

关键词： transonic and supersonic wind tunnel wide angle diffuser flange loads analysis

Studies of reasonability of computing return period of storm surge based on random events set

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Marine Science Bulletin 2017年第4期19卷 24-36页

作者： LI Xuan GONG Mao-xun KANG Xing chen bing-rui College of marine science Shanghai Ocean University Shanghai 201306 China East China Sea Marine Information Center of SOA Shanghai 200137 China East China Sea Marine Forecasting Center of SOA Shanghai 200081 China

In order to study whether the random events set can be used in Rudongbank of Nantong or not, we use ADCIRC model to stimulate the storm surge affectingRudong bank based on random events set. Then we use p-III curve to fit peak-value ofsurge of all the years to get the surge of typical return periods. The result shows that theresults of fitting by ADCIRC and by historical data coincide well in lower return periods,but to higher return periods, the results of fitting by ADCIRC are significantly higher thanthat of fitting by historical data. Due to the short time, it’s not enough for the extremestorm surge events to occur, the results of higher return periods are not reliable, so wecan’t rule out the reasonability of results based on random events set. The results offitting based on random events set are accurate in lower return periods and we can alsofully estimate the surge of higher return periods based on random events set. In thesituation of lacking historical data of hundreds of years, random events set can beaccepted as a tool to compute the return period of storm surge. Consideration of globalwarming, the possibility of super typhoons’ appearance will rise, which will result inhigher surge of return periods. In order to prevent the disaster of storm surge, thegovernment needs to deepen and reinforce the coastal engineering like seawalls and embankments.

关键词： random events set storm surge reasonability

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Excavation-induced microseismicity and rockburst occurrence:Similarities and differences between deep parallel tunnels with alternating soft-hard strata

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Journal of Central South University 2021年第2期28卷 582-594页

作者： FENG Guang-liang chen bing-rui JIANG Quan XIAO Ya-xun NIU Wen-jing LI Peng-xiang State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan 430071China Guangxi Key Laboratory of Disaster Prevention and Engineering Safety Guangxi UniversityNanning 530000China Key Laboratory of Ministry of Education of Safe Mining of Deep Metal Mines Northeastern UniversityShenyang 110819China

Excavation-induced microseismicity and rockburst occurrence in deep underground projects provide invaluable information that can be used to warn rockburst occurrence,facilitate rockburst mitigation procedures,and analyze the mechanisms responsible for their *** on the deep parallel tunnels with the maximum depth of 1890 m created as part of the Neelum–Jhelum hydropower project in Pakistan,similarities and differences on excavation-induced microseismicity and rockburst occurrence between parallel tunnels with soft and hard alternant strata are *** show that a large number of microseismic(MS)events occurred in each of the parallel tunnels during *** occurred most frequently in certain local sections of the two *** differences are found in the excavation-induced microseismicity(spatial distribution and number of MS events,distribution of MS energy,and pattern of microseismicity variation)and rockbursts characteristics(the number and the spatial distribution)between the parallel *** to predict the microseismicity and rockburst intensities likely to be encountered in subsequent tunnel based on the activity encountered when the parallel tunnel was previously excavated will not be an easy or accurate procedure in deep tunnel projects involving complex lithological conditions.

关键词： microseismicity rockburst soft and hard alternant strata deep parallel tunnels Neelum–Jhelum hydropower project

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RNA结合蛋白质谱鉴定技术研究进展

中国生物工程杂志 2023年第7期43卷 77-87页

作者：孙若航陈瑞冰天津大学药物科学与技术学院天津300072

RNA结合蛋白在细胞中通过与RNA结合参与调控RNA的整个生命周期,在基因表达和生命进程中发挥着重要作用。RNA和蛋白质的结合异常与多种疾病的发生与发展密切相关,因此,探索RNA-蛋白质相互作用对研究潜在的生物功能和临床病理机制至关重... 详细信息

RNA结合蛋白在细胞中通过与RNA结合参与调控RNA的整个生命周期,在基因表达和生命进程中发挥着重要作用。RNA和蛋白质的结合异常与多种疾病的发生与发展密切相关,因此,探索RNA-蛋白质相互作用对研究潜在的生物功能和临床病理机制至关重要。近年来,随着鉴定技术的不断进步与革新,许多新的非经典RNA结合蛋白不断被发现。这些RNA结合蛋白大多数缺乏已知的RNA结合结构域,RNA与蛋白质之间复杂、多样的相互作用关系仍需进一步探究。从高通量鉴定和靶向鉴定两个方面,对基于质谱分析的RNA结合蛋白鉴定技术的最新进展进行综述,并着重讨论其技术原理、应用领域和优缺点,以期为更好地探索RNA-蛋白质相互作用的生物学功能及其在临床疾病中的作用机制提供参考。

关键词： RNA结合蛋白 RNA-蛋白质相互作用蛋白质组学质谱

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一种可拆装式椭圆榫节点的设计与性能分析

木材科学与技术 2022年第2期36卷 65-70,86页

作者：陈炳睿胡文刚南京林业大学家居与工业设计学院江苏南京210037

为实现实木椭圆榫接合家具节点的可拆装性,提出一种通过五金连接件改良椭圆榫节点的方法,测试T型构件的抗拔及抗弯力学性能,并分析节点加载过程中的力学行为及失效形式。结果发现,较对照椭圆榫节点,改良五金件连接节点的极限抗拔承载力... 详细信息

为实现实木椭圆榫接合家具节点的可拆装性,提出一种通过五金连接件改良椭圆榫节点的方法,测试T型构件的抗拔及抗弯力学性能,并分析节点加载过程中的力学行为及失效形式。结果发现,较对照椭圆榫节点,改良五金件连接节点的极限抗拔承载力达到5614.61 N,提升了230%,但破坏弯矩降低了48.6%,刚性系数降低了45.6%。在保留实木椭圆榫外观及可拆装设计的前提下,本研究设计的可拆装式椭圆榫节点能满足多数木制品节点的使用强度要求,为后续实木可拆装式椭圆榫节点的优化设计提供依据及方法。

关键词：椭圆榫接合可拆装设计五金连接件 T型节点力学强度

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AP2/ERF转录因子调控次生代谢产物生物合成的研究进展

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中国中药杂志 2020年第22期45卷 5412-5420页

作者：肖亮陈瑞兵吴宇张磊第二军医大学药学院药用植物学教研室上海200433

AP2/ERF转录因子是植物中广泛存在的一类转录因子,该家族转录因子至少含有一段由约60~70个氨基酸组成的保守的AP2/ERF结构域。AP2/ERF转录因子广泛参与植物多种生理过程,包括植株生长、果实成熟、花发育等植物发育进程,以及损伤、病虫... 详细信息

AP2/ERF转录因子是植物中广泛存在的一类转录因子,该家族转录因子至少含有一段由约60~70个氨基酸组成的保守的AP2/ERF结构域。AP2/ERF转录因子广泛参与植物多种生理过程,包括植株生长、果实成熟、花发育等植物发育进程,以及损伤、病虫害防御、高盐、干旱等逆境胁迫响应过程。近年来,以转录因子为遗传操作靶点的次生代谢工程在提高药用植物活性成分含量和改良植物品质方面得到了快速发展。该文综述了AP2/ERF转录因子调控次生代谢产物生物合成方面的研究进展,为挖掘高效调控靶点,开展药用植物次生代谢调控,靶向性提高中药活性成分含量,实现高品质中药材的可持续供应提供理论依据。

关键词： AP2/ERF转录因子次生代谢产物转录调控生物合成

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矽卡岩单轴循环加卸载试验及声发射特性研究

岩土力学 2009年第10期30卷 2929-2934页

作者：徐速超冯夏庭陈炳瑞东北大学资源与土木工程学院沈阳110004 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室武汉430071

利用MTS岩石力学试验系统和PAC声发射信号采集系统,研究了单轴循环加卸载作用下矽卡岩强度变化及声发射特征。在矽卡岩循环加卸载过程中,若加载过程中岩样没有明显局部破坏,则随着循环次数的增加,弹性模量逐渐增大,岩样强度略有提高;若... 详细信息

利用MTS岩石力学试验系统和PAC声发射信号采集系统,研究了单轴循环加卸载作用下矽卡岩强度变化及声发射特征。在矽卡岩循环加卸载过程中,若加载过程中岩样没有明显局部破坏,则随着循环次数的增加,弹性模量逐渐增大,岩样强度略有提高;若加载过程中岩样内部已经出现明显的局部破坏,产生了不可恢复的宏观裂纹,则循环加卸载会促进宏观裂纹层面间的滑移,从而加速岩样失稳破坏。矽卡岩在单轴压缩作用下声发射曲线大体可分为压密、弹性、塑性、峰后屈服4个阶段,并伴随有不同的声发射情况。此外,矽卡岩在循环加卸载作用下具有反凯塞效应,并且随着加卸载循环次数的增加,费拉西蒂比逐渐变小;岩样卸载阶段仍然有大量声发射产生。

关键词：矽卡岩单轴压缩声发射振铃数绝对能量循环加卸载

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利用导重法进行结构轻量化设计

工程力学 2016年第2期33卷 179-187页

作者：陈树勋韦齐峰黄锦成陈大海陈瑞兵广西大学机械工程学院南宁530004 广西大学土木建筑工程学院南宁530004 广西大学计算机与电子信息学院南宁530004

结构轻量化设计的目的是以最少的设计资源设计出性能合格的产品结构,以降低产品生产成本,提高产品性价比和市场竞争力。结构轻量化的实质是材料重量在结构几何空间内及构件间的合理分配。导重法是可用于产品结构轻量化的结构优化有效方... 详细信息

结构轻量化设计的目的是以最少的设计资源设计出性能合格的产品结构,以降低产品生产成本,提高产品性价比和市场竞争力。结构轻量化的实质是材料重量在结构几何空间内及构件间的合理分配。导重法是可用于产品结构轻量化的结构优化有效方法,它可适用于包括各类单元的各种产品结构构件尺寸优化与结构几何形状优化以及结构拓扑优化;其目标与约束可以涉及各种结构静动力性态。首先给出结构优化导重法用于结构轻量化设计的具有广泛一般性的数学模型及其求解方法。接着给出一种新的包络函数—方根包络函数,使数目庞大的应力与位移约束凝聚为单值强度约束与单值精度约束;还给出适用于多数产品结构轻量化设计的单性态约束优化实用模型与解法;最后给出两个产品结构轻量化的应用实例,验证了导重法用于轻量化设计的有效性与广泛适用性。

关键词：结构优化导重法产品结构轻量化工程应用

Research progress of catalysts for direct coal liquefaction

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Journal of Energy Chemistry 2025年第1期100卷 481-497页

作者： Wei Song Penggao Liu Xinyue chen Ting Wang Chunrong He rui Hao Kaiyu Liu State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of Chemistry Xinjiang University College of Chemistry and Chemical Engineering Henan Polytechnic University Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering Central South University

Coal direct liquefaction technology is a crucial contemporary coal chemical technology for efficient and clean use of coal resources. The development of direct coal liquefaction technology and the promotion of alternative energy sources are important measures to guarantee energy security and economic security. However, several challenges need to be addressed, including low conversion rate, inadequate oil yield, significant coking, demanding reaction conditions, and high energy consumption. Extensive research has been conducted on these issues, but further exploration is required in certain aspects such as pyrolysis of macromolecules during the liquefaction process, hydrogen activation, catalysts' performance and stability, solvent hydrogenation, as well as interactions between free radicals to understand their mechanisms better. This paper presents a comprehensive analysis of the design strategy for efficient catalysts in coal liquefaction, encompassing the mechanism of coal liquefaction, catalyst construction,and enhancement of catalytic conversion efficiency. It serves as a comprehensive guide for further research endeavors. Firstly, it systematically summarizes the conversion mechanism of direct coal liquefaction, provides detailed descriptions of various catalyst design strategies, and especially outlines the catalytic mechanism. Furthermore, it addresses the challenges and prospects associated with constructing efficient catalysts for direct coal liquefaction based on an understanding of their action mechanisms.

关键词： Direct coal liquefaction Catalysts Mechanism of action Solvent hydrogenation