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冲击载荷下动压巷道坚硬顶板动态力学特性及其破坏机理研究

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山东煤炭科技 2024年第1期42卷 123-127,132页

作者：朱孟智郭际鹏谭秀君陕西正通煤业有限责任公司陕西咸阳713699 华能灵台邵寨煤业有限责任公司甘肃平凉744401

为研究冲击载荷作用下动压巷道坚硬顶板的动态力学特性及其破坏机理,利用SHPB冲击试验和数值模拟相结合的方法,分析了不同岩性顶板的动态力学特性和破坏模式,从应力波的角度揭示了其破坏机理。结果表明:试样的动态力学特性具有较强的应... 详细信息

为研究冲击载荷作用下动压巷道坚硬顶板的动态力学特性及其破坏机理,利用SHPB冲击试验和数值模拟相结合的方法,分析了不同岩性顶板的动态力学特性和破坏模式,从应力波的角度揭示了其破坏机理。结果表明:试样的动态力学特性具有较强的应变率效应,动态抗压强度与应变率呈线性关系增长;随着冲击载荷增大,试样的动态抗压强度、动态弹性模量和极限应变在一定范围内均增大,破坏模式具有从张拉破坏向剪切破坏变化的趋势;应力波在试样内部反射形成的拉伸波在试样内部轴心叠加是导致内部裂纹扩展贯通破坏的主要原因。

关键词：冲击载荷岩层力学特性破坏机理

Gut microbiota and differential genes-maintained homeostasis is key to maintaining health of individuals with Yang-deficiency constitution

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Journal of Traditional Chinese Medicine 2022年第1期42卷 96-101页

作者： ZHANG Huixiang WANG Limei guo jipeng WANG Jiai ZHANG Qianqian WANG Yutao LIU Xun ZHANG Lihuan SHI Lanlan WU Hongxiang CAO Xue Institute of Neuroscience Basic Medical CollegeKunming Medical UniversityKunming 650500China Department of Laboratory Animal Science Kunming Medical UniversityKunming 650500China Department of Laboratory Animal Science Kunming Medical UniversityState Key Laboratory for Conservation and Utilization of Bio-Resources in YunnanYunnan UniversityKunming 650500Chin Faculty of Rehabilitation Medicine Kunming Medical UniversityKunming 650500China School of Electrical and Information Technology Yunnan Minzu UniversityKunming 650500China School of Medicine Kunming UniversityKunming 650214China Basic Medical College Kunming Medical UniversityKunming 650500China Department of Anatomy Histology and EmbryologyBasic Medical CollegeKunming Medical UniversityKunming 650500China

OBJECTIVE:Yang-deficiency constitution(YADC)is a common unbalanced constitution that predisposes individuals to certain ***,not all people with YADC manifest develop *** calls for delineation of the underlying molecular *** studies suggested that the gut microbiota and gene differential expression should be ***:In the present study,we compared profiles of gut microbiota between four healthy YADC individuals and those of five healthy balanced constitution(BC)counterparts,based on 16 S r RNA gene sequence ***,YADC relevant genes identified by comparing 62 healthy YADC and 58 healthy BC individuals in total to perform intersection analysis,functional clustering and pathway enrichment ***:The levels of harmful gut microbiota(Prevotellaceae,LDA score>4.0,P=0.0141)and beneficial gut microbiota(Ruminococcaceae,LDA score>4.0,P=0.0025,Faecalibacterium,LDA score>4.0,P=0.0484)were both elevated in healthy YADC ***,we found that the specific metabolic pathway with 2,6-Dichloro-p-hydroquinone 1,2-Dioxygenase(Pcp A)as the core in gut microbiota and the glutathione transferase activity has been enriched by YADC relevant genes in healthy YADC individuals were both responsible for the detoxification of halogenated aromatic hydrocarbon ***:Both beneficial and harmful factors had been detected in healthy YADC individuals,functionally,they may have triggered homeostasis to maintain the health of individuals with *** homeostasis may be maintained by beneficial and harmful factors from gut flora and *** studies are expected to focus on halogenated aromatic hydrocarbons and their detoxification processes.

关键词： Yang deficiency physical constitution theory health promotion gastrointestinal microbiome genes hydrocarbons aromatic homeostasis

Comprehensive reutilization of herbal waste:Coproduction of magnolol,honokiol,and β-amyrin from Magnolia officinalis residue

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Green Energy & Environment 2024年第2期9卷 403-412页

作者： Lukun Xiao Anyi Zhao Jie Qiu An Liu Sha Chen Jinzhu Jiang Jun Zhang Cong guo jipeng Di Jintang Cheng Chang Chen Kangxin Hou Aiping Zhang Yan Liu Caixia Wang Institute of Chinese Materia Medica China Academy of Chinese Medical SciencesBeijing100700China School of Pharmacy Shanxi Medical UniversityTaiyuan030001China

Herbal extraction residues(HERs)cause serious environmental pollution and resource *** this study,a novel green route was designed for the comprehensive reutilization of all components in HERs,taking Magnolia officinalis residues(MOR)as an *** reluctant structure of MOR was first destroyed by alkali pretreatment to release the functional ingredients(magnolol and honokiol)originally remaining in MOR and to make MOR more accessible for hydrolysis.A metal–organic frame material MIL-101(Cr)with a maximum absorption capacity of 255.64 mg g^(-1)was synthesized to absorb the released honokiol and magnolol from the pretreated MOR solutions,and 40 g L^(-1)reducing sugars were obtained with 81.8%enzymatic hydrolysis rate at 10%MOR solid ***,382 mg L-1β-amyrin was produced from MOR hydrolysates by an engineered yeast *** total,1 kg honokiol,8 kg magnolol,and 7.64 kg β-amyrin could produce from 1 ton MOR by this cleaner process with a total economic output of 170,700 RMB.

关键词： Magnolia officinalis residues(MOR) Comprehensive utilization Metal-organic frame material Biosynthesis

Innovations in metallurgical and materials processes:advancing liquid theory and honoring ***-jie guo's contributions to physical chemistry in metallurgy

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Journal of Iron and Steel Research International 2024年第1期31卷 1-2页

作者： Shuai Liu Jing guo Han-jie guo School of Artificial Intelligence Beijing Technology and Business UniversityBeijing100048China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing100083China

Spanning three decades,***-jie guo's research group has dedicated itself to exploring the fundamental theories and practical applications of physical chemistry within the realm of *** under the assumption that molecul... 详细信息

关键词： chemistry liquid complexes

OBE教育理念下的高校英语翻译人才培养模式探析

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现代英语 2023年第18期 96-99页

作者：郭继鹏吉林农业大学吉林长春130118

翻译是文化传播的桥梁,是对外经贸发展的纽带,优质翻译人才是我国高质量发展的坚实基础之一。为更好地提升英语翻译人才培养质量,文章以OBE理念为理论基础,探析高校翻译人才培养模式,激发学生从被动学习到主动思考的转变,改变学生的学... 详细信息

翻译是文化传播的桥梁,是对外经贸发展的纽带,优质翻译人才是我国高质量发展的坚实基础之一。为更好地提升英语翻译人才培养质量,文章以OBE理念为理论基础,探析高校翻译人才培养模式,激发学生从被动学习到主动思考的转变,改变学生的学习及思维习惯,有助于培养学生的主动性、创造性,对接社会需求,同时有利于促进现代大学英语教育质量,对翻译人才培养模式提供有益的借鉴与参考。

关键词： OBE理念高校英语翻译人才培养模式

Emerging direct current triboelectric nanogenerator for high-entropy mechanical energy harvesting

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Science China(Technological Sciences) 2024年第5期67卷 1297-1316页

作者： CHEN Jie guo RuiLong guo HengYu College of Physics and Electronic Engineering Chongqing Normal UniversityChongqing 401331China Department of Applied Physics Chongqing UniversityChongqing 401331China

In the era of the Internet of Things(IoT),the provision of sustainable power to distributed,mobile,and low-power-consumption electronic devices is a critical *** overcome this challenge,the triboelectric nanogenerator(TENG),a highly efficient high-entropy mechanical energy harvesting device,was developed in *** device enables the direct conversion of irregular and low-frequency mechanical energy into pulsed alternating current(AC)***,the incompatibility of most electronic devices with AC signals necessitates rectifier circuits or generators that deliver direct current(DC)*** recent years,DC-TENGs have undergone extensive development,achieving significant milestones in various application fields while also facing crucial challenges that require *** this review,three categories of DC-TENG devices with distinct operating mechanisms are comprehensively explored:multiphase coupling,mechanical rectification,and air *** typical structures and working mechanisms are thoroughly discussed,and specific output performance limitations,along with corresponding optimization strategies,are ***,the applications of DC-TENGs in various scenarios are ***,the challenges faced by DC-TENGs and potential solutions are analyzed to guide further advancements in this technology.

关键词： TENG direct current working mechanisms output performance limitations optimization strategies

Physicochemical principles of hydrogen metallurgy in blast furnace

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Journal of Iron and Steel Research International 2024年第1期31卷 46-63页

作者： Han-jie guo School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials Beijing100083China

Based on the stoichiometric method and the free energy minimization method,an ideal model for the reduction of iron oxides by carbon and hydrogen under blast furnace conditions was established,and the reduction efficiency and theoretical energy consumption of the all-carbon blast furnace and the hydrogen-rich blast furnace were *** results show that after the reduction reaction is completed at the bottom of the blast furnace,the gas produced by reduction at 1600℃still has a certain excessive reduction capacity,which is due to the hydrogen brought in by the hydrogen-rich blast as well as the excess carbon monoxide generated by the reaction of the coke and the oxygen brought in by the *** the process of the gas with excessive reduction capacity rising from the bottom of the blast furnace and gas reduction process,the excessive reduction capacity of the gas gradually decreases with the increase in the dydrogen content in the *** the all-carbon blast furnace,the excess gas reduction capacity is the strongest,and the total energy consumption per ton of iron reduction is the *** shows that,for the current operation mode of the blast furnace,adding hydrogen in the blast furnace cannot reduce the consumption of carbon required for reduction per ton of iron,but rather increases the consumption of carbon.

关键词： Hydrogen metallurgy Excess gas reduction capacity Theoretical energy consumption Hydrogen-rich blast furnace Thermodynamic model Gibbs minimum free energy method

Control Strategies for Digital Twin Systems

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IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 170-180页

作者： guo-Ping Liu IEEE the Center for Control Science and Technology Southern University of Science and TechnologyShenzhen 518055China

With the continuous breakthrough in information technology and its integration into practical applications, industrial digital twins are expected to accelerate their development in the near future. This paper studies various control strategies for digital twin systems from the viewpoint of practical *** make full use of advantages of digital twins for control systems, an architecture of digital twin control systems, adaptive model tracking scheme, performance prediction scheme, performance retention scheme, and fault tolerant control scheme are proposed. Those schemes are detailed to deal with different issues on model tracking, performance prediction, performance retention, and fault tolerant control of digital twin systems. Also, the stability of digital twin control systems is analysed. The proposed schemes for digital twin control systems are illustrated by examples.

关键词： Digital twin control systems fault tolerant control model tracking performance prediction performance retention

A Deep Learning Method for Computing Eigenvalues of the Fractional Schrödinger Operator

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Journal of Systems Science & Complexity 2024年第2期37卷 391-412页

作者： guo Yixiao MING Pingbing LSEC Institute of Computational Mathematics and Scientific/Engineering ComputingAcademy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049China

The authors present a novel deep learning method for computing eigenvalues of the fractional Schrödinger *** proposed approach combines a newly developed loss function with an innovative neural network architecture that incorporates prior knowledge of the *** improvements enable the proposed method to handle both high-dimensional problems and problems posed on irregular bounded *** authors successfully compute up to the first 30 eigenvalues for various fractional Schrödinger *** an application,the authors share a conjecture to the fractional order isospectral problem that has not yet been studied.

关键词： Eigenvalue problem deep learning fractional Schrödinger operator isospectral problem