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Analysis of the Influence of Geometrical Parameters on the Performance of a Proton Exchange Membrane Fuel Cell

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Fluid Dynamics & Materials Processing 2024年第1期20卷 219-237页

作者： Guodong Zhang Huifang Tao Da Li Kewei Chen guoxiang Li Shuzhan Bai Ke sun School of Energy and Power Engineering Shandong UniversityJinan250061China Sinotruk Jinan Special Purpose Vehicle Co. Ltd.Jinan250117China

A suitable channel structure can lead to efficient gas distribution and significantly improve the power density of fuel cells.In this study,the influence of two channel design parameters is investigated,namely,the ratio of the channel width to the bipolar plate ridge width(i.e.,the channel ridge ratio)and the channel depth.The impact of these parameters is evaluated with respect to the flow pattern,the gas composition distribution,the temperature field and the fuel cell output capability.The results show that a decrease in the channel ridge ratio and an increase in the channel depth can effectively make the distributions of velocity,temperature and concentration more uniform in each channel and improve the output capability of the fuel cell.An increase in the channel ridge ratio and depth obviously reduces the flow resistance and improves the flow characteristics.

关键词： Hydrogen fuel cell bipolar plate flow channel multiphysics coupling

Cambrian integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年第4期67卷 950-970页

作者： Zhixin sun Lang sun Fangchen ZHAO Bing PAN Malik Muhammad Saud Sajid KHAN Shehryar AHMED Chuan YANG Lanyun MIAO Zongjun YIN guoxiang LI Maoyan ZHU State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

The Qinghai-Tibetan Plateau and its surrounding areas have a long and complex tectonic evolutionary history.Cratons and blocks,such as northern India,Lhasa,Qiangtang,Qaidam and Central Qilian,and their in-between orogenic belts constitute the main part of the Qinghai-Tibetan Plateau.During the Cambrian Period,most of these cratons and blocks were on the northwestern periphery of Gondwana,and were associated with the surrounding blocks,e.g.Arabian,Central Iran,Afghanistan,Tarim,Alxa,North China,South China and Sibumasu through the Proto-Tethys Ocean.The Cambrian stratigraphic sequences on these stable blocks are composed of mixed siliciclastic and carbonate rocks deposited in the shallow-water marine environments,and contain the trilobite assemblages of shelf facies.The Cambrian stratigraphic sequences in the Qilian tectonic belts,however,are characterized by the intermediate-basic igneous rocks and silicates formed in the Proto-Tethys Ocean,and contain the trilobite assemblages of deep-water slope facies.Combining with previous data,field observations and newly discovered fossils through funding by the Second Tibetan Plateau Scientific Expedition and Research,the general characteristics of the Cambrian strata in different tectonic units of the Qinghai-Tibetan Plateau and its surrounding areas have been summarized in this paper.Furthermore,efforts have been made to subdivide and correlate the Cambrian strata across these areas by utilizing available biostratigraphic and geochronological data.As a result,a comprehensive litho-and biostratigraphy chart has been compiled.Finally,from the biogeographic perspective,this paper also provides a brief overview of the Cambrian paleogeographical reconstruction of the major tectonic blocks,and discusses the problems associated with the evolution of the ProtoTethys tectonic belt.

关键词： Qinghai-Tibetan Plateau Cambrian Stratigraphy Paleogeography Biota Gondwana Proto-Tethys Ocean

Cryogenian and Ediacaran integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年第4期67卷 919-949页

作者： Lang sun Malik Muhammad Saud Sajid KHAN Chuan YANG Zhixin sun Bing PAN Shehryar AHMED Lanyun MIAO Weichen sun Chunlin HU Xiaojuan sun Cui LUO Bo CHEN Zongjun YIN Fangchen ZHAO guoxiang LI Maoyan ZHU State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

The complex evolutionary history of the Qinghai-Tibetan Plateau and its surrounding areas,including the continental blocks(Indian,Lhasa,South Qiangtang,Tarim,Olongbuluk,Central Qilian,Alxa,North China,Yangtze,Central Iran and Oman)and the orogenic belts between them,has long been the frontier in Earth science research.The Cryogenian and Ediacaran strata are extensively distributed in these blocks.Specifically,relatively complete Cryogenian and Ediacaran successions have been discovered in Oman,Indian,Yangtze,and Tarim blocks,while only the Ediacaran successions have been reported in Iran,the South Qiangtang,Central Qilian,Alxa,and North China blocks.Based on previous studies together with the integration of new materials and advancement obtained through the Second Tibetan Plateau Scientific Expedition and Research,this review aims to synthesize a correlative stratigraphic framework of the representative Cryogenian and Ediacaran sequences from the Qinghai-Tibetan Plateau and its surrounding areas.Furthermore,the Cryogenian and Ediacaran biotas and major geological events in these areas are comprehensively discussed in aspects of current research status.The results indicate that,in general,Ediacaran fossils of each area exhibit distinct features in preservation and assemblage composition,but the typical late Ediacaran fossils Cloudina and Shaanxilithes have been reported from most of these areas.In addition to the two global Cryogenian glaciations,late Ediacaran glaciogenic deposits are extensively recorded in the areas within and around the northern QinghaiTibetan Plateau(including the North China,Alxa,Central Qilian,Olongbuluk,and Tarim blocks,and the North Qilian Accretionary Belt),as well as central and southern Iran.However,further research is required to determine the age,distribution,and origin of these late Ediacaran glaciogenic deposits.Meanwhile,the middle Ediacaran DOUNCE/Shuram Excursion is widely documented in the Qinghai-Tibetan Plateau and its surrounding areas.The available data show that,after the

关键词： Qinghai-Tibetan Plateau Cryogenian Ediacaran Stratigraphy Palaeogeography Biota Gondwana

UV,five wavelengths fusion and electrochemical fingerprints combined with antioxidant activity for quality control of antiviral mixture

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Asian Journal of Traditional Medicines 2024年第3期19卷 119-136,151页

作者： Kaining Zhou Zini Tang guoxiang sun Ping Guo Lili Lan College of Pharmacy Shenyang Pharmaceutical UniversityShenyang 110016China

Aiming to ensure the consistency of quality control of Traditional Chinese Medicines(TCMs),a combination method of high-performance liquid chromatography(HPLC),ultraviolet(UV),electrochemical(EC)was developed in this study to comprehensively evaluate the quality of Antiviral Mixture(AM),and Comprehensive Linear Quantification Fingerprint Method(CLQFM)was used to process the data.Quantitative analysis of three active substances in TCM was conducted.A fivewavelength fusion fingerprint(FWFF)was developed,using second-order derivatives of UV spectral data to differentiate sample levels effectively.The combination of HPLC and UV spectrophotometry,along with electrochemical fingerprinting(ECFP),successfully evaluated total active substances.Ultimately,a multidimensional profiling analytical system for TCM was developed.

关键词： TCM antiviral mixture five-wavelength fusion fingerprint(FWFF) Comprehensive Linear Quantification Fingerprint Method(CLQFM) quantization fingerprint antioxidant activity profilling

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数字经济时代刑事司法的穿透与克制

国家检察官学院学报 2024年第3期32卷 32-48页

作者：孙国祥南京大学法学院

数字经济的发展,带来了犯罪活动的新场域,产生了新的社会风险和新的犯罪现象。刑法需要从立法和司法两个方面谋求应对之策。但立法规范供给不足是常态,司法的穿透式实质认定在一定程度上可以缓解规范供给不足的燃眉之急。司法通过穿透... 详细信息

数字经济的发展,带来了犯罪活动的新场域,产生了新的社会风险和新的犯罪现象。刑法需要从立法和司法两个方面谋求应对之策。但立法规范供给不足是常态,司法的穿透式实质认定在一定程度上可以缓解规范供给不足的燃眉之急。司法通过穿透式认定,贯通物理世界与虚拟世界,尽可能将利用数字技术而实施的法益侵害行为纳入既有的犯罪中,以增强刑法的适应性,满足数字经济领域的刑法供给。不过,穿透式实质认定不能模糊司法与立法各自不同的功能属性,不能否定司法克制的价值。穿透式入罪应坚守核心刑法的基本原则(如罪刑法定原则、责任主义等),防止以穿透为名而恣意扩张刑法的适用范围。在这过程中,应充分发挥穿透式实质认定的出罪功能。

关键词：数字经济网络犯罪数字犯罪穿透式入罪穿透式出罪

Cryogenian and Ediacaran integrative stratigraphy, biotas, and palaeogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年

作者： Lang sun Malik Muhammad Saud Sajid KHAN Chuan YANG Zhixin sun Bing PAN Shehryar AHMED Lanyun MIAO Weichen sun Chunlin HU Xiaojuan sun Cui LUO Bo CHEN Zongjun YIN Fangchen ZHAO guoxiang LI Maoyan ZHU State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences

The complex evolutionary history of the Qinghai-Tibetan Plateau and its surrounding areas, including the continental blocks (Indian, Lhasa, South Qiangtang, Tarim, Olongbuluk, Central Qilian, Alxa, North China, Yangtze, Central Iran and Oman) and the orogenic belts between them, has long been the frontier in Earth science research. The Cryogenian and Ediacaran strata are extensively distributed in these blocks. Specifically, relatively complete Cryogenian and Ediacaran successions have been discovered in Oman, Indian, Yangtze, and Tarim blocks, while only the Ediacaran successions have been reported in Iran,the South Qiangtang, Central Qilian, Alxa, and North China blocks. Based on previous studies together with the integration of new materials and advancement obtained through the Second Tibetan Plateau Scientific Expedition and Research, this review aims to synthesize a correlative stratigraphic framework of the representative Cryogenian and Ediacaran sequences from the Qinghai-Tibetan Plateau and its surrounding areas. Furthermore, the Cryogenian and Ediacaran biotas and major geological events in these areas are comprehensively discussed in aspects of current research status. The results indicate that, in general,Ediacaran fossils of each area exhibit distinct features in preservation and assemblage composition, but the typical late Ediacaran fossils Cloudina and Shaanxilithes have been reported from most of these areas. In addition to the two global Cryogenian glaciations, late Ediacaran glaciogenic deposits are extensively recorded in the areas within and around the northern QinghaiTibetan Plateau (including the North China, Alxa, Central Qilian, Olongbuluk, and Tarim blocks, and the North Qilian Accretionary Belt), as well as central and southern Iran. However, further research is required to determine the age, distribution, and origin of these late Ediacaran glaciogenic deposits. Meanwhile, the middle Ediacaran DOUNCE/Shuram Excursion is widely documented in the Qinghai-Tibetan Plateau and its surrounding

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从实践到理论:单位犯罪制度的发展历程与未来展望

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中国应用法学 2024年第2期 117-133页

作者：孙国祥南京大学

改革开放催生了单位犯罪的现象和相关刑法理论。45年来,有关单位犯罪的立法从无到有、从少到多,虽然起步较晚,但步伐很快,且至今仍无停歇的迹象。与之相对应,单位犯罪的理论研究也经历了理论启蒙、立法注释和本体建构三个阶段,积累了丰... 详细信息

改革开放催生了单位犯罪的现象和相关刑法理论。45年来,有关单位犯罪的立法从无到有、从少到多,虽然起步较晚,但步伐很快,且至今仍无停歇的迹象。与之相对应,单位犯罪的理论研究也经历了理论启蒙、立法注释和本体建构三个阶段,积累了丰富成果。回溯45年来有关单位犯罪的立法和司法,不难发现,立法与司法存在一定程度的脱节,司法对单位犯罪的认定始终秉持一种谨慎的立场。在对单位犯罪的理论研究中,归责基础的本体建构仍是薄弱环节,司法实践中的诸多问题也亟须理论破解。展望未来单位犯罪制度的发展方向,理论研究应当立足于本土的立法和司法实践,深入研究单位犯罪的基础性问题,尤其是单位犯罪的刑事责任基础、刑事政策转型,以理论创新回应单位犯罪的实践问题,为建设具有中国特色的单位犯罪制度提供支撑。

关键词：单位犯罪法人犯罪企业犯罪经济犯罪

渤、黄海天文潮—风暴潮相互作用及其对极值水位的贡献

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海洋工程 2024年第2期42卷 137-147页

作者：孙婉静骆钊武国相中交第二航务工程局有限公司湖北武汉430040 长大桥梁建设施工技术交通行业重点实验室湖北武汉430040 交通运输行业交通基础设施智能制造技术研发中心湖北武汉430040 中国海洋大学山东青岛266100

基于Delft3D模型建立了中国渤、黄海风暴潮数值模型,选取1979—2020年影响该海域的93场风暴过程(包括台风、寒潮和温带气旋),模拟了所产生的风暴增水和风暴潮总水位。采用泊松—皮尔逊复合极值分布理论,推算了渤、黄海对应不同重现期的... 详细信息

基于Delft3D模型建立了中国渤、黄海风暴潮数值模型,选取1979—2020年影响该海域的93场风暴过程(包括台风、寒潮和温带气旋),模拟了所产生的风暴增水和风暴潮总水位。采用泊松—皮尔逊复合极值分布理论,推算了渤、黄海对应不同重现期的极值水位;通过数值试验,对天文潮—风暴潮非线性相互作用对极值水位的贡献进行了量化分析。研究结果表明,渤海的莱州湾、渤海湾,以及黄海的江华湾、西朝鲜湾风暴增水最大,其中江华湾北侧和渤海湾西南侧的百年一遇风暴增水可达4 m;天文潮—风暴潮非线性相互作用在潮差较大、水深较浅的河口、湾顶区域更为显著,与耦合模型结果相比,非线性作用使极值水位值偏小,天文潮、风暴潮增水的线性叠加可显著高估极值水位,高估的幅值可达0.5~0.8 m。考虑重现期极值水位是海岸灾害防护工程的关键设计参数之一,对海岸构筑物的安全和建造成本影响极大,应重视天文潮—风暴潮非线性相互作用对重现期水位的影响。

关键词：风暴潮重现期统计分析天文潮极值水位

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格列齐特缓释片的剂量倾泻研究

中国医药工业杂志 2024年第4期55卷 565-570页

作者：刘梦婷孙国祥沈阳药科大学药学院辽宁沈阳110016 华夏生生药业(北京)有限公司北京102600

通过在0.1 mol/L盐酸中添加不同浓度乙醇和提高转速2种方法,评估格列齐特(1)缓释片自制制剂和参比制剂发生剂量倾泻的风险。采用HPLC法进行检测,并对检测方法进行了方法学验证。研究结果显示,参比制剂与自制制剂在加入不同浓度乙醇的盐... 详细信息

通过在0.1 mol/L盐酸中添加不同浓度乙醇和提高转速2种方法,评估格列齐特(1)缓释片自制制剂和参比制剂发生剂量倾泻的风险。采用HPLC法进行检测,并对检测方法进行了方法学验证。研究结果显示,参比制剂与自制制剂在加入不同浓度乙醇的盐酸及提高转速后的释放行为基本一致,相似因子(f_(2))均大于50,且均无剂量倾泻现象。此外,1在含乙醇的盐酸中降解非常迅速,1 h降解约40%,产生杂质A和杂质C,且杂质含量已远超质量标准规定的可接受限度,应引起重视。在服用1缓释片时应禁止饮酒,避免因杂质超标而增加未知的安全风险。

关键词：剂量倾泻降解格列齐特缓释片体外释放