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Experimental investigation on pyrolysis products and pore structure characteristics of organic-rich shale heated by supercritical carbon dioxide

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Petroleum Science 2024年第4期21卷 2393-2406页

作者： Bai-Shuo Liu Chuan-Jin Yao Jia-Long Qi Ya-Qian Liu Liang Xu jing-xuan Hou State Key Laboratory of Deep Oil and Gas China University of Petroleum (East China) Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)) Ministry of Education School of Petroleum Engineering China University of Petroleum (East China)

The efficient pyrolysis and conversion of organic matter in organic-rich shale,as well as the effective recovery of pyrolysis shale oil and gas,play a vital role in alleviating energy *** state of carbon dioxide（CO2） in the pyrolysis environment of shale reservoirs is the supercritical *** unique supercritical fluid properties not only effectively heat organic matter,displace pyrolysis products and change shale pore structure,but also achieve carbon storage to a certain *** samples were made into powder and three sizes of cores,and nitrogen（N2） and supercritical carbon dioxide（ScCO2）pyrolysis experiments were performed at different final pyrolysis *** properties and mineral characteristics of the pyrolysis products were studied based on gas chromatography analysis,Xray diffraction tests,and mass spectrometry ***,the pore structure characteristics at different regions of cores before and after pyrolysis were analyzed using N2adsorption tests to clarify the impact of fracturing degree on the pyrolysis *** results indicate that the optimal pyrolysis temperature of Longkou shale is about 430℃.Compared with N2,the oil yield of ScCO2pyrolysis is *** pyrolysis oil obtained by ScCO2extraction has more intermediate fractions and higher relative molecular *** ScCO2can effectively improve the pore diameter of shale and its effect is better than that of *** micropores are produced in shale after pyrolysis,and the macropores only are generated in ScCO2pyrolysis environments with temperatures greater than 430℃.The pore structure has different development characteristics at different pyrolysis temperatures,which are mainly affected by the pressure holding of volatile matter and products *** to the surface of the core,the pore development effect inside the core is *** the decrease in core size,the pore diameter,specific surface area,and pore volume of cores all increase after pyrolysis.

关键词： Organic-rich shale Supercritical carbon dioxide In-situ pyrolysis Pore structure Core size and region

FlowerMate 2.0: Identifying plants in China with artificial intelligence

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The Innovation 2024年第4期5卷 27-29页

作者： Gan Xie jing xuan Bing Liu Yibo Luo Yufei Wang Xinhui Zou Min Li State Key Laboratory of Plant Diversity and Specialty Crops and Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of SciencesBeijing 100093China Big Data and AI Research Center of Biodiversity Conservation Institute of BotanyChinese Academy of SciencesBeijing 100093China China National Botanical Garden Beijing 100093China University of Chinese Academy of Sciences Beijing 100049China

Dear Editor,Plant identification is essential for human *** our ancestors,accurate plant identification meant the ability to locate appropriate food sources,materials for fire,tools,weapons,and medicinal herbs to treat diseases and *** knowledge was crucial for the survival of their families and ***,challenges such as global warming and population growth necessitate the selection and development of new energy sources,food crops,and medicinal plants to sustain and enhance our well-being,underscoring the ongoing importance of plant ***,accurate identification serves as the foundation of nearly all plant-related disciplines,including phylogeny,biogeography,ecological restoration,resource management,biodiversity conservation,agronomy,forestry,and pharmacy.1 Without accurate plant identification,even the most ambitious research endeavors are effectively baseless.

关键词： phylogeny artificial crops

A novel route to enhance high-temperature mechanical property and thermal shock resistance of low-carbon Mgo-C bricks by introducing ZrSiO_(4)

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Journal of Iron and Steel Research International 2024年第6期31卷 1436-1448页

作者： Chun-hui Sun Ling-ling Zhu Hao Yan Wei Zhao jing-xuan Liu Lin Ren Xian-tang Zhao Xiao-song Tong Shu-wen Yu Beijing Lirr High-Temperature Materials Co. Ltd.Beijing 102211China School of Materials Science and Engineering Henan Province Industrial Technology Research Institute of Resources and MaterialsZhengzhou UniversityZhengzhou 450001HenanChina School of Chemistry and Chemical Engineering Suzhou UniversitySuzhou 234000AnhuiChina

Conventional MgO-C bricks(graphite content>14 wt.%)produce a great deal of greenhouse gas emission,while low-carbon MgO-C bricks have serious thermal shock resistance during high-temperature *** enhance the high-temperature mechanical property and thermal shock resistance of low-carbon MgO-C bricks,a novel route of introducing ZrSiO_(4) powder into low-carbon MgO-C bricks was reported in such refractories with 2 wt.% flaky *** results indicate that the low-carbon MgO-C brick with 0.5 wt.%ZrSiO_(4) addition has the maximum hot modulus of rupture at 1400℃ and the corresponding specimen fired in the carbon embedded atmosphere has the maximum residual strength ratio(98.6%)after three thermal shock *** is found that some needle-like AlON and plate-like Al_(2)O_(3)-ZrO_(2) composites were in situ formed in the matrices after the low-carbon MgO-C bricks were coked at 1400℃,which can enhance the high-temperature mechanical property and thermal shock resistance due to the effect of fiber toughening and particle ***,CO_(2) emission of the newly developed low-carbon MgO-C bricks is reduced by 58.3% per ton steel after using them as the working lining of a 90 t vacuum oxygen decarburization ladle.

关键词： Low-carbon MgO-C brick ZrsiO_(4) Synergistic toughening effect High-temperature mechanical property Thermal shock resistance Vacuum oxygen decarburization ladle

Medcheck:A novel software for automated de-formulation of traditional Chinese medicine(TCM)prescriptions by liquid chromatography-mass spectrometry

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Journal of Pharmaceutical Analysis 2024年第6期14卷 930-932页

作者： Xiao-lan Li Jian-qing Zhang Yun Li xuan-jing Shen Huan-ya Yang Lin Yang Meng Xu Qi-rui Bi Chang-liang Yao De-an Guo Shanghai Research Center for Modernization of Traditional Chinese Medicine National Engineering Research Center of TCM Standardization TechnologyShanghai Institute of Materia MedicaChinese Academy of SciencesShanghai201203China b University of Chinese Academy of Sciences Beijing100049China

Prescriptions are the main clinical application of traditional Chinese medicines(TCMs).Common forms include Chinese patent medicines,Kampo formulas,and hospital decoctions.A new pre-scription called“famous classical formulas”is recently developed and expected to boom in the *** constituent me-dicinal plants in prescriptions is critical for new drug development and quality control[1],which could avoid safety issues from adulteration or substandard ingredients,as seen in the notorious Longdan Xiegan Pill event.

关键词： medicines formulation prescription

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朱利安·巴恩斯小说中的历史记忆与身份认同

湘潭大学学报（哲学社会科学版） 2024年第1期48卷 157-162页

作者：李婧璇湘潭大学外国语学院湖南湘潭411105

朱利安·巴恩斯是英国当代著名小说家,2011年荣获布克奖,历史记忆是其小说的重要主题。巴恩斯通过多样的艺术形式深刻展现了历史记忆对型塑身份认同的重要意义。在其小说中,个体的记忆困惑与遗忘导致了身份认同危机,而记忆重拾则参与了... 详细信息

朱利安·巴恩斯是英国当代著名小说家,2011年荣获布克奖,历史记忆是其小说的重要主题。巴恩斯通过多样的艺术形式深刻展现了历史记忆对型塑身份认同的重要意义。在其小说中,个体的记忆困惑与遗忘导致了身份认同危机,而记忆重拾则参与了身份认同的建构,此外国家也运用历史记忆型塑国民的国家认同,而超国家政治共同体则同样借用历史记忆维护其成员的认同感,巩固其政治地位。

关键词：朱利安·巴恩斯历史记忆身份认同

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改进卷积胶囊网络的滚动轴承故障诊断方法

振动工程学报 2024年第5期37卷 885-895页

作者：赵小强柴靖轩兰州理工大学电气工程与信息工程学院甘肃兰州730050 甘肃省工业过程先进控制重点实验室甘肃兰州730050 兰州理工大学国家级电气与控制工程实验室教学中心甘肃兰州730050

目前许多基于卷积网络的滚动轴承故障诊断方法受噪声信号以及负荷变化的影响,存在诊断效果不佳、泛化能力差的问题。针对此问题提出一种改进卷积胶囊网络的滚动轴承变工况故障诊断方法。该方法设计了多尺度非对称卷积模块,其中采用不同... 详细信息

目前许多基于卷积网络的滚动轴承故障诊断方法受噪声信号以及负荷变化的影响,存在诊断效果不佳、泛化能力差的问题。针对此问题提出一种改进卷积胶囊网络的滚动轴承变工况故障诊断方法。该方法设计了多尺度非对称卷积模块,其中采用不同尺度的非对称卷积层对输入数据进行特征提取,在实现最大化提取数据中的特征信息的同时,还能够有效减少参数量;在该模块中引入通道注意力机制,能更好地提取有用的通道特征,提高该方法特征提取的能力;通过将网络中的全连接层改进为胶囊全连接层,使得胶囊在输出向量特征信息时,避免了特征信息在空间中的丢失。使用凯斯西储大学轴承数据集和东南大学变速箱数据集来验证所提方法的诊断性能,并与其他深度学习方法进行了比较。实验结果表明,与其他深度学习方法相比,具有较好的泛化性,效果更佳。

关键词：故障诊断滚动轴承胶囊网络非对称卷积特征提取

中国共产党为什么重视民族问题与民族工作——基于新民主主义革命时期中国共产党的革命实践

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北方民族大学学报（哲学社会科学版） 2024年第5期 41-49页

作者：何明汪敬轩云南大学西南边疆少数民族研究中心云南昆明650091

学界对新民主主义革命时期中国共产党民族政策和民族工作的相关研究更多集中在总结“是什么”,而对于中国共产党为什么重视民族问题和民族工作的相关研究存在不足。基于对新民主主义革命时期党史文献的梳理,对中国共产党为什么重视民族... 详细信息

学界对新民主主义革命时期中国共产党民族政策和民族工作的相关研究更多集中在总结“是什么”,而对于中国共产党为什么重视民族问题和民族工作的相关研究存在不足。基于对新民主主义革命时期党史文献的梳理,对中国共产党为什么重视民族问题和民族工作这一问题进行解答,是对中国共产党为什么“能”这一时代课题的历史性回应,同时也能给当下中华民族共同体建设工作提供经验启示。研究认为,新民主主义革命时期,中国共产党对民族问题和民族工作的重视,一是因为马克思主义民族理论对中国共产党民族观的塑造,二是在特定时局背景下中国共产党革命目标和使命的必然要求,三是中国共产党在革命实践中形成的经验认识发挥着思想基础的作用。

关键词：新民主主义革命中国共产党民族问题和民族工作马克思主义民族理论革命经验

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人文与经济融合发展:教育何为

终身教育研究 2024年第1期35卷 3-8页

作者：荆晅江苏开放大学党委

人文与经济融合发展以人民对美好生活的向往为旨归,以中华优秀传统文化传承为根脉,以文化与经济的共生共荣为支撑。教育赋能人文与经济融合发展根源于:教育是培养人才、促进经济社会发展的重要手段,是传承中华优秀传统文化、促进文化创... 详细信息

人文与经济融合发展以人民对美好生活的向往为旨归,以中华优秀传统文化传承为根脉,以文化与经济的共生共荣为支撑。教育赋能人文与经济融合发展根源于:教育是培养人才、促进经济社会发展的重要手段,是传承中华优秀传统文化、促进文化创新的有效方式,是提高国民素质、促进人的全面发展的根本途径。面对现实中的挑战,教育应回归初心,坚持立德树人;以文弘道,培育人文精神;育才提质,服务文化和经济繁荣,从而持续为地区发展注入经济创新的活力、人文精神的底蕴和现代文明的气质。

关键词：人文经济教育人文精神中华优秀传统文化人才培养

界面水分子扩散对超高分子量聚乙烯摩擦学性能影响的反应分子动力学模拟研究

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高分子学报 2024年第2期55卷 222-234页

作者：郑庭谷靖萱程启昊张会臣大连海事大学船舶与海洋工程学院大连116026

采用基于反应力场(ReaxFF)的分子动力学模拟方法,研究了摩擦界面水分子向超高分子量聚乙烯(UHMWPE)基体扩散和渗透的基本过程.分子模拟结果表明:摩擦过程中,水分子稳定吸附在Fe板表面,并与聚乙烯链形成分子内摩擦,使聚乙烯分子产生剪切... 详细信息

采用基于反应力场(ReaxFF)的分子动力学模拟方法,研究了摩擦界面水分子向超高分子量聚乙烯(UHMWPE)基体扩散和渗透的基本过程.分子模拟结果表明:摩擦过程中,水分子稳定吸附在Fe板表面,并与聚乙烯链形成分子内摩擦,使聚乙烯分子产生剪切变形.当Fe板表面存在纳尺度外凸结构时,其在UHMWPE表面的耕犁作用更为显著,使摩擦界面的内摩擦力显著增加.当摩擦速度增加时,摩擦界面原子温度显著升高.在水润滑条件下,界面水分子逐渐扩散到UHMWPE基体中,引起相邻聚乙烯链之间的原子距离增加,这导致聚乙烯链之间的相互作用强度降低.此外,摩擦界面处还伴随着水分子中氢氧键断裂,并引起相应原子的电荷跃变.此时,水氧原子与Fe原子形成Fe―O化合物,且具有与Fe2O3相似的晶体结构.水分子扩散进入UHMWPE内时,还引起其周围聚乙烯分子的电荷发生改变,造成UHMWPE表层原子电荷分布不均匀.

关键词：反应分子动力学模拟超高分子量聚乙烯水分子扩散分子键断裂电荷转移