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十二水硫酸铝铵-十水硫酸钠共晶复合相变材料的制备及其性能研究

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化工新型材料 2024年第10期52卷 83-89,95页

作者：胡彪王会张振迎刘琪华北理工大学建筑工程学院唐山063210 中国科学院过程工程研究所介科学与工程全国重点实验室北京100190 江西零碳未来能源发展有限公司抚州344703

针对单一水合盐相变材料相变温区适配性差,利用熔融共混法制备十二水硫酸铝铵-十水硫酸钠共晶复合相变材料,实现了单一相变材料的温度调控。共晶复合相变材料的相变温度为71℃,潜热值为242.85kJ/kg。采用质量分数为1%的氧化铝作为成核剂... 详细信息

针对单一水合盐相变材料相变温区适配性差,利用熔融共混法制备十二水硫酸铝铵-十水硫酸钠共晶复合相变材料,实现了单一相变材料的温度调控。共晶复合相变材料的相变温度为71℃,潜热值为242.85kJ/kg。采用质量分数为1%的氧化铝作为成核剂,复合材料的过冷度由9.4℃降低至2.5℃;添加高导热膨胀石墨提高材料的传热性能,复合材料的导热系数为原材料的1.73倍;改性后的复合相变材料循环稳定性显著提高,且储热释热密度为259.27kJ/kg。解决了单一十二水硫酸铝铵相变温度与供热末端所需温度不匹配的矛盾,制备的新型十二水硫酸铝铵-十水硫酸钠共晶复合相变材料具有合适的相变温度和较高的相变潜热,可作为以散热器为末端的供热系统、热水系统等领域的候选材料。

关键词：共晶相变材料十二水硫酸铝铵十水硫酸钠

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大椎穴的古代文献研究探微

中华中医药杂志 2024年第6期39卷 2788-2791页

作者：厉文凤张振营熊珍陈少宗日照市中医医院针灸科日照276800 山东中医药大学针灸推拿学院济南250355 山东中医药大学针灸研究院济南250014

大椎又名百劳、上杼,是临床常用的督脉腧穴。文章整理归纳古籍中大椎的穴名渊源、定位与循经、穴性特点、主治规律,以及对于“骨会大杼”争议的解释。总结得出大椎作为八会穴之骨会和三阳督脉之会,具有解表退热、强壮健骨、振奋阳气的作... 详细信息

大椎又名百劳、上杼,是临床常用的督脉腧穴。文章整理归纳古籍中大椎的穴名渊源、定位与循经、穴性特点、主治规律,以及对于“骨会大杼”争议的解释。总结得出大椎作为八会穴之骨会和三阳督脉之会,具有解表退热、强壮健骨、振奋阳气的作用,可广泛用于治疗内、外、妇、儿、五官科等多科疾病。从浩瀚的古代文献记载中梳理出大椎的相关内容,以拓宽本穴的现代应用范围,以期为临床治疗和实验研究提供更多思路和参考依据。

关键词：大椎腧穴骨会主治规律文献研究

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有机鎓盐类光生酸剂研究及其应用进展

石油化工 2024年第10期53卷 1513-1521页

作者：吴子昂韩书亮张志箭张珍颖宋文波中石化(北京)化工研究院有限公司北京100013

光照下碘鎓盐、硫鎓盐类光生酸剂分解产生的质子强酸可促使环氧、乙烯基醚等单体发生阳离子聚合,因此在许多领域具有广泛的应用潜力。综述了碘鎓盐类、硫鎓盐类以及不同类型阴离子光生酸剂的改性、合成以及在阳离子聚合中的应用,同时介... 详细信息

光照下碘鎓盐、硫鎓盐类光生酸剂分解产生的质子强酸可促使环氧、乙烯基醚等单体发生阳离子聚合,因此在许多领域具有广泛的应用潜力。综述了碘鎓盐类、硫鎓盐类以及不同类型阴离子光生酸剂的改性、合成以及在阳离子聚合中的应用,同时介绍了鎓盐类光生酸剂作为金属催化烯烃插入聚合助催化剂的应用,并对鎓盐类光生酸剂的未来前景进行了展望。

关键词：光生酸剂催化剂阳离子聚合鎓盐

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The ALMA-QUARKS Survey.Ⅰ.Survey Description and Data Reduction

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Research in Astronomy and Astrophysics 2024年第2期24卷 104-124页

作者：刘训川 Tie Liu Lei Zhu Guido Garay Hong-Li Liu Paul Goldsmith Neal Evans Kee-Tae Kim Sheng-Yuan Liu Fengwei Xu Xing Lu Anandmayee Tej Xiaofeng Mai Leonardo Bronfman Shanghuo Li Diego Mardones Amelia Stutz Ken'ichi Tatematsu Ke Wang Qizhou zhang Sheng-Li Qin Jianwen Zhou Qiuyi Luo Siju zhang Yu Cheng Jinhua He Qilao Gu Ziyang Li zhenying zhang Suinan zhang Anindya Saha Lokesh Dewangan Patricio Sanhueza Zhiqiang Shen Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Departamento de Astronomía Universidad de ChileLas Condes7591245 SantiagoChile School of Physics and Astronomy Yunnan UniversityKunming 650091China Jet Propulsion Laboratory California Institute of Technology4800 Oak Grove DrivePasadena CA 91109USA Department of Astronomy The University of Texas at AustinTX 78712-1205USA Korea Astronomy and Space Science Institute 776 Daedeokdae-roYuseong-guDaejeon 34055Republic of Korea Institute of Astronomy and Astrophysics Academia SinicaRoosevelt RoadTaipei 10617China Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Department of Astronomy School of PhysicsPeking UniversityBeijing 100871China Indian Institute of Space Science and Technology Thiruvananthapuram 695547KeralaIndia Max Planck Institute for Astronomy Königstuhl 17D-69117 HeidelbergGermany Departamento de Astronomía Universidad de ConcepciónCasilla 160-CConcepciónChile Nobeyama Radio Observatory National Astronomical Observatory of JapanNational Institutes of Natural Sciences462-2 NobeyamaMinamimakiMinamisakuNagano 384-1305Japan Center for Astrophysics∣Harvard&Smithsonian 60 Garden StreetCambridgeMA 02138USA Max-Planck-Institut für Radioastronomie Auf dem Hügel 69D-53125 BonnGermany School of Astronomy and Space Sciences University of Chinese Academy of SciencesBeijing 100049China National Astronomical Observatory of Japan 2-21-1 OsawaMitakaTokyo181-8588Japan Yunnan Observatories Chinese Academy of SciencesKunming 650216China Physical Research Laboratory NavrangpuraAhmedabad-380009India Astronomical Science Program The Graduate University for Advanced StudiesSOKENDAI2-21-1 OsawaMitakaTokyo 181-8588Japan University of Science and Technology Korea(UST)217 Gajeong-roYuseong-guDaejeon 34113Republic o

This paper presents an overview of the QUARKS survey,which stands for Querying Underlying mechanisms of massive star formation with ALMA-Resolved gas Kinematics and Structures."The QUARKS survey is observing139 massive clumps covered by 156 pointings at Atacama Large Millimeter/submillimeter Array(ALMA)Band 6(λ~1.3 mm).In conjunction with data obtained from the ALMA-ATOMS survey at Band 3(λ~3 mm),QUARKS aims to carry out an unbiased statistical investigation of massive star formation process within protoclusters down to a scale of 1000 *** overview paper describes the observations and data reduction of the QUARKS survey,and gives a first look at an exemplar source,the mini-starburst Sgr B2(M).The wide-b and width(7.5 GHz)and high-angular-resolution(~0."3)observations of the QUARKS survey allow for the resolution of much more compact cores than those could be done by the ATOMS survey,and to detect previously unrevealed fainter filamentary *** spectral windows cover transitions of species including CO,SO,N_(2)D^(+),SiO,H_(30)α,H_(2)CO,CH_(3)CN,and many other complex organic molecules,tracing gas components with different temperatures and spatial *** aims to deepen our understanding of several scientific topics of massive star formation,such as the mass transport within protoclusters by(hub-)filamentary structures,the existence of massive starless cores,the physical and chemical properties of dense cores within protoclusters,and the feedback from already formed high-mass young protostars.

关键词： stars formation-stars kinematics and dynamics-ISM clouds-ISM molecules

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含污泥生活垃圾的抗剪强度特性研究

水利规划与设计 2024年第10期 105-109页

作者：郑嘉恒张振营浙江理工大学建筑工程学院浙江杭州310018

为研究含污泥生活垃圾的抗剪强度特性,采集杭州天子岭填埋场的生活垃圾和污泥,考虑不同的污泥含水率和有机质含量进行直剪实验。结果表明:(1)污泥含水率提高,含污泥垃圾的抗剪强度增大;污泥有机质含量提高,含污泥垃圾抗剪强度减小;(2)... 详细信息

为研究含污泥生活垃圾的抗剪强度特性,采集杭州天子岭填埋场的生活垃圾和污泥,考虑不同的污泥含水率和有机质含量进行直剪实验。结果表明:(1)污泥含水率提高,含污泥垃圾的抗剪强度增大;污泥有机质含量提高,含污泥垃圾抗剪强度减小;(2)污泥含水率的提高使得含污泥垃圾的黏聚力和内摩擦角增大;(3)污泥有机质含量提高使得含污泥垃圾黏聚力增大、内摩擦角减小。研究结果可为含污泥垃圾填埋场的稳定性分析提供基础数据。

关键词：城市生活垃圾污泥直剪试验有机质含量含水率抗剪强度参数

A Parametric Study on the Effect of Mixing Chamber for Expansion Work Recovery CO_(2) Ejector

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Journal of Thermal Science 2022年第6期31卷 1914-1927页

作者： FENG Xu zhang zhenying WU Yuting TIAN Dingzhu Key Laboratory of Enhanced Heat Transfer and Energy Conservation Ministry of Education and Key Laboratory of Heat Transfer and Energy ConversionBeijing MunicipalityCollege of Environmental and Energy EngineeringBeijing University of TechnologyBeijing 100124China School of Architecture and Civil Engineering North China University of Science and TechnologyTangshan 063210China

A numerical study of supercritical CO_(2) two-phase flow in the ejector was carried out by computational fluid dynamics(CFD) methods. Through the comparison of simulation results and available experimental data in the literature, the accuracy of the three-dimensional CFD model was verified. A comparison of the effects of four turbulence models on the simulation calculation results was also presented. The distributions of pressure, velocity, two-phase volume fraction, shock wave and exergy flux inside the ejector were analyzed. The effects of the mixing section geometry on the performance of the ejector were obtained. Then, the entrained performance of the ejector was investigated by changing the area ratio between the constant-area mixing chamber and the outlet of the motive nozzle(AR) and the ratio between the length and the diameter of the constant-area mixing chamber(LDR). Finally, the optimum AR and LDR were determined to be 8.3 and 8.1, respectively based on the maximum entrained ratio and the minimum exergy destruction. Through optimizing the mixing chamber geometry, the minimum total exergy destruction and the maximum mass entrainment ratio(MER) of the ejector can attain 0.33 J/(kg·K) and 0.698, respectively.

关键词： CO_(2)ejector mixing chamber CFD AR LDR

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窒息氧合在临床麻醉中的研究进展

临床麻醉学杂志 2024年第7期40卷 757-761页

作者：王剑文张桢英贾政阎文军甘肃中医药大学第一临床医学院兰州市730000 甘肃省人民医院麻醉科

窒息氧合是指患者在没有自主呼吸或机械正压通气的情况下血液从肺部摄取氧气维持氧合。在全麻实施过程中,诱导后自主呼吸停止而安全的气道未建立之前,使用窒息氧合能在预充氧的基础上延长患者的安全呼吸暂停时间,从而减少气管插管的尝... 详细信息

窒息氧合是指患者在没有自主呼吸或机械正压通气的情况下血液从肺部摄取氧气维持氧合。在全麻实施过程中,诱导后自主呼吸停止而安全的气道未建立之前,使用窒息氧合能在预充氧的基础上延长患者的安全呼吸暂停时间,从而减少气管插管的尝试次数,降低气道损伤以及低氧血症、血流动力学失代偿的发生率。近十年来,越来越多的窒息氧合技术已经被应用于不同的临床环境中,如围术期的气道管理和“无管麻醉”等。为进一步加深对窒息氧合的认识和了解其应用范围,本文根据现有关于窒息氧合机制、方法及临床应用的最新研究进行综述,为临床应用提供参考。

关键词：窒息氧合经鼻高流量氧疗气道管理

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直接蒸发式人工冰场传热的数值模拟

热科学与技术 2024年第1期23卷 24-29页

作者：张振迎刘西高尚萱龚凯常莉王昆华北理工大学建筑工程学院河北唐山063210 华北理工大学科学技术处河北唐山063210

2022年北京冬奥会的举行促使我国的人工冰场迅速发展。运用数模拟的方法对直接蒸发式人工冰场进行传热模拟,研究了防冻管温度、冰面温度、供冷管间距等因素对供冷管热流密度及温度、冰面温度均匀性的影响。结果表明,防冻管温度的变化对... 详细信息

2022年北京冬奥会的举行促使我国的人工冰场迅速发展。运用数模拟的方法对直接蒸发式人工冰场进行传热模拟,研究了防冻管温度、冰面温度、供冷管间距等因素对供冷管热流密度及温度、冰面温度均匀性的影响。结果表明,防冻管温度的变化对冰面温度的影响可以忽略;冰场供冷管内工质的蒸发温度为-32.000~-22.400℃;冰面温度降低1.000℃,冰场冷负荷增加5.90 W/m^(2),供冷管内工质的蒸发温度降低1.200~1.500℃;随着供冷排管间距的增加,供冷管内工质的蒸发温度和冰面温度均匀性下降;间距从30增加到60 mm,冷管内工质的蒸发温度降低15.9%,冰面温度不均匀性指标温差最值从0.004增加到0.111℃。

关键词：人工冰场传热数值模拟冷管间距

Effect of loading rate on shear strength parameters of mechanically and biologically treated waste

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Frontiers of Environmental Science & Engineering 2022年第12期16卷 121-132页

作者： Guoyang Fan zhenying zhang Jiahe zhang Jiayue zhang Qiaona Wang Min Wang Bang Wang Chengyu Nie School of Civil Engineering and Architecture Zhejiang Sci-tech UniversityHangzhou310018China

Mechanical biological treatment(MBT)technology has attracted increasing attention because it can reduce the volume of waste *** deal with the current trend of increasing waste,MBT practices are being adopted to address waste generated in developing urban *** this study,a total of 20 specimens of consolidated undrained triaxial tests were conducted on waste obtained from the Hangzhou Tianziling landfill,China,to evaluate the effect of loading rate on the shear strength parameters of MBT *** MBT waste samples exhibited an evident strain-hardening behavior,and no peak was observed even when the axial strain exceeded 25%.Further,the shear strength increased with an increase in the loading rate;the effect of loading rate on shear strength under a low confining pressure was greater than that under a high confining ***,the shear strength parameters of MBT waste were related to the loading *** relationship between the cohesion,internal friction angle,and logarithm of the loading rate could be fitted to a linear relationship,which was established in this ***,the ranges of shear strength parameters cohesion c and effective cohesion c′were determined as 1.0–8.2 kPa and 2.1–14.9 kPa,respectively;the ranges of the internal friction angleφand effective internal friction angleφ’were determined as 16.2°–29°and 19.8°–43.9°,*** results could be used as a valuable reference for conducting stability analyses of MBT landfills.

关键词： Mechanically and biologically treated waste Landfill Triaxial test Loading rate Axial strain Shear strength parameter