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An advanced ash fusion study on the melting behaviour of coal,oil shale and blends under gasification conditions using picture analysis and graphing method

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Chinese Journal of Chemical Engineering 2021年第4期34卷 393-407页

作者： Yang Meng peng Jiang yuxin Yan yuxin Pan Xinyun Wu Haitao Zhao Nusrat Sharmin Edward Lester Tao Wu Cheng Heng Pang Department of Chemical and Environmental Engineering The University of Nottingham Ningbo ChinaNingbo 315100China Ningbo New Materials Institute The University of NottinghamNingbo 315042China Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridge 02139USA Department of Chemical and Environmental Engineering The University of NottinghamNottingham NG72RDUK Key Laboratory for Carbonaceous Wastes Processing and Process Intensification Research of Zhejiang Province The University of Nottingham Ningbo ChinaNingbo 315100China

This study investigates the potential of solid fuel blending as an effective approach to manipulate ash melting behaviour to alleviate ashrelated problems during gasification,thus improving design,operability and *** ash fusion characteristics of Qinghai bituminous coal together with Fushun,Xinghua and Laoheishan oil shales(and their respective blends)were quantified using a novel picture analysis and graphing method,which incorporates conventional ash fusion study,dilatometry and sintering strength test,in a CO/CO_(2)*** imagebased characterisation method was used to monitor and quantify the complete melting behaviour of ash samples from room temperature to 1520℃.The impacts of blending on compositional changes during heating were determined experimentally via Xray diffraction and validated computationally using *** showed that the melting point of Qinghai coal ash to be the lowest at 1116℃,but would increase up to 1208℃,1161℃and 1160℃with the addition of 30%50%of Laoheishan,Fushun,and Xinghua oil shales,*** formation of highmelting anorthite and mullite structures inhibits the formation of lowmelting ***,the sintering point of Qinghai coal ash was seen to decrease from 1005℃to 855℃,834℃,and 819℃in the same blends due to the formation of lowmelting *** also showed that blending directly influences the sintering strength during the various stages of *** key finding from this study is that it is possible to mitigate against the severe ash slagging and fouling issue arising from high calcium and iron coals by cogasification with a high silicaalumina oil ***,blending coals with oil shales can also modify the ash melting behaviour of fuels to create the optimal ash chemistry that meets the design specification of the gasifier,without adversely affecting thermal performance.

关键词： Oil shale Coal Image-based ash fusion test Co-gasification Mineral transformation

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Microstructural Evolution and Mechanical Properties of Inconel 625 Alloy during Pulsed Plasma Arc Deposition Process

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Journal of Materials Science & Technology 2013年第5期29卷 480-488页

作者： Fujia Xu Yaohui Lv yuxin Liu Fengyuan Shu peng He Binshi Xu State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology National Key Laboratory for Remanufacturing Academy of Armored Forces Engineering

Pulsed plasma arc deposition （PPAD）, which combines pulsed plasma cladding with rapid prototyping, is a promising technology for manufacturing near net shape components due to its superiority in cost and convenience of processing. In the present research, PPAD was successfully used to fabricate the Ni-based superalloy Inconel 625 components. The microstructures and mechanical properties of deposits were investigated by scanning electron microscopy （SEM）, optical microscopy （OM）, transmission electron microscopy （TEM） with energy dispersive spectrometer （EDS）, microhardness and tensile testers. It was found that the as-deposited structure exhibited homogenous columnar dendrite structure, which grew epitaxially along the deposition direction. Moreover, some intermetallic phases such as Laves phase, minor MC （NbC, TiC） carbides and needle-like δ-Ni3Nb were observed in y-Ni matrix. Precipitation mechanism and distribution characteristics of these intermetallic phases in the as-deposited 625 alloy sample were analyzed. In order to evaluate the mechanical properties of the deposits, microhardness was measured at various location （including transverse plane and longitudinal plane）. The results revealed hardness was in the range of 260- 285 HVo.2. In particular, microhardness at the interface region between two adjacent deposited layers was slightly higher than that at other regions due to highly refined structure and the disperse distribution of Laves particles. Finally, the influence of precipitation phases and fabrication strategies on the tensile properties of the as-deposited samples was investigated. The failure modes of the tensile specimens were analyzed with fractography.

关键词： Pulsed plasma arc deposition Inconel 625 components Microstructure Mechanical properties

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A comprehensive review of lunar lava tube base construction and field research on a potential Earth test site

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International Journal of Mining Science and Technology 2024年第9期34卷 1201-1216页

作者： Yujie Feng peng-Zhi Pan Xuhai Tang Zhaofeng Wang yuxin Li Altaf Hussain State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan 430071China University of Chinese Academy of Sciences Beijing 100049China School of Civil Engineering Wuhan UniversityWuhan 430072China

The Moon,as the closest celestial body to the Earth,plays a pivotal role in the progression of deep space exploration,and the establishment of research outposts on its surface represents a crucial step in this *** lava tubes are special underground caves formed by volcanic eruptions and are considered as ideal natural shelters and scientific laboratories for lunar base *** paper begins with an in-depth overview of the geological origins,exploration history,and distribution locations of lunar lava ***,it delves into the presentation of four distinctive advantages and typical concepts for constructing bases within lava tubes,summarizing the ground-based attempts made thus far in lunar lava tube base *** studies conducted on a lava tube in Hainan revealed rock compositions similar to those found during the Apollo missions and clear lava tube structures,making it a promising analog ***,the challenges and opportunities encountered in the field of geotechnical engineering regarding the establishment of lunar lava tube bases are discussed,encompassing cave exploration technologies,in-situ testing methods,geomechanical properties under lunar extreme environments,base design and structural stability assessment,excavation and reinforcement techniques,and simulated Earth-based lava tube base.

关键词： Lunar lava tube Lunar base construction Extraterrestrial cave exploration Earth analog site

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Maintaining moderate levels of hypochlorous acid promotes neural stem cell proliferation and differentiation in the recovery phase of stroke

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Neural Regeneration Research 2025年第3期20卷 845-857页

作者： Lin-Yan Huang Yi-De Zhang Jie Chen Hai-Di Fan Wan Wang Bin Wang Ju-Yun Ma peng-peng Li Hai-Wei Pu Xin-Yian Guo Jian-Gang Shen Su-Hua Qi School of Medical Technology Xuzhou Key Laboratory of Laboratory DiagnosticsXuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Pharmacy Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina Department of Laboratory Medicine Branch Hospital of Huai’an First People’s HospitalHuai’anJiangsu ProvinceChina Department of Laboratory Medicine the Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Chinese Medicine The University of Hong KongHong Kong Special Administrative RegionChina

It has been shown clinically that continuous removal of ischemia/reperfusion-induced reactive oxygen species is not conducive to the recovery of late ***,previous studies have shown that excessive increases in hypochlorous acid after stroke can cause severe damage to brain *** previous studies have found that a small amount of hypochlorous acid still exists in the later stage of stroke,but its specific role and mechanism are currently *** simulate stroke in vivo,a middle cerebral artery occlusion rat model was established,with an oxygen-glucose deprivation/reoxygenation model established in vitro to mimic *** found that in the early stage(within 24 hours)of ischemic stroke,neutrophils produced a large amount of hypochlorous acid,while in the recovery phase(10 days after stroke),microglia were activated and produced a small amount of hypochlorous ***,in acute stroke in rats,hypochlorous acid production was prevented using a hypochlorous acid scavenger,taurine,or myeloperoxidase inhibitor,4-aminobenzoic acid *** results showed that high levels of hypochlorous acid(200μM)induced neuronal apoptosis after oxygen/glucose deprivation/***,in the recovery phase of the middle cerebral artery occlusion model,a moderate level of hypochlorous acid promoted the proliferation and differentiation of neural stem cells into neurons and *** suggests that hypochlorous acid plays different roles at different phases of cerebral ischemia/reperfusion *** levels of hypochlorous acid(5 and 100μM)promoted nuclear translocation ofβ-*** transfection of single-site mutation plasmids,we found that hypochlorous acid induced chlorination of theβ-catenin tyrosine 30 residue,which promoted nuclear ***,our study indicates that maintaining low levels of hypochlorous acid plays a key role in the recovery of neurological function.

关键词： cell differentiation cerebral ischemia/reperfusion injury chlorination hypochlorous acid microglia neural stem cell neurogenesis nuclear translocation stroke β-catenin

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Virus-induced gene silencing(VIGS)in Chinese narcissus and its use in functional analysis of NtMYB3

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Horticultural Plant Journal 2021年第6期7卷 565-572页

作者： Ping Zhou Jiayu peng Minjie Zeng Lixuan Wu yuxin Fan Lihui Zeng College of Horticulture Fujian Agriculture and Forestry UniversityFuzhou 35002China College of Horticulture Nanjing Agriculture UniversityNanjing 210095China

Virus-induced gene silencing(VIGS)is a natural defense mechanism of plants,which can cause sequence-specific degradation of viral RNA and is often used for studying the functional *** present,the VIGS system mediated by Tobacco rattle virus(TRV)has been successfully established in many plant ***,the VIGS system in Chinese narcissus had not been reported *** this paper,the first use of the TRV-VIGS system in Chinese narcissus is described in *** injecting pTRV2-GFP into narcissus leaves,we confirmed that TRV could infect narcissus and move in narcissus *** the inoculation of pTRV2-Nt PDS by two methods,phenomena such as photo-bleaching appeared in narcissus leaves and qRT-PCR results proved that PDS gene of narcissus was successfully ***,pTRV2-NtMYB3 was inoculated into basal plates of narcissus to study the function of NtMYB3;the results showed that NtMYB3 is an inhibitor of flavonoids biosynthesis,which can increase the content of proanthocyanidins in basal plates of narcissus by repressing the expression level of *** results indicate that the TRV-VIGS system has been successfully established in Chinese narcissus and successfully applied to the functional study of NtMYB3.

关键词： Chinese narcissus VIGS Tobacco rattle virus(TRV) NtPDS NtMYB3

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Peripheral mitochondrial DNA as a neuroinflammatory biomarker for major depressive disorder

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Neural Regeneration Research 2025年第6期20卷 1541-1554页

作者： Jinmei Ye Cong Duan Jiaxin Han Jinrong Chen Ning Sun Yuan Li Tifei Yuan Daihui peng Division of Mood Disorder Shanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghaiChina Department of Psychiatry First Hospital of Shanxi Medical UniversityTaiyuanShanxi ProvinceChina Shanghai Key Laboratory of Psychotic Disorders Brain Health InstituteNational Center for Mental DisordersShanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghaiChina Co-Innovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina

In the pathogenesis of major depressive disorder, chronic stress-related neuroinflammation hinders favorable prognosis and antidepressant response. Mitochondrial DNA may be an inflammatory trigger, after its release from stress-induced dysfunctional central nervous system mitochondria into peripheral circulation. This evidence supports the potential use of peripheral mitochondrial DNA as a neuroinflammatory biomarker for the diagnosis and treatment of major depressive disorder. Herein, we critically review the neuroinflammation theory in major depressive disorder, providing compelling evidence that mitochondrial DNA release acts as a critical biological substrate, and that it constitutes the neuroinflammatory disease pathway. After its release, mitochondrial DNA can be carried in the exosomes and transported to extracellular spaces in the central nervous system and peripheral circulation. Detectable exosomes render encaged mitochondrial DNA relatively stable. This mitochondrial DNA in peripheral circulation can thus be directly detected in clinical practice. These characteristics illustrate the potential for mitochondrial DNA to serve as an innovative clinical biomarker and molecular treatment target for major depressive disorder. This review also highlights the future potential value of clinical applications combining mitochondrial DNA with a panel of other biomarkers, to improve diagnostic precision in major depressive disorder.

关键词： biomarker cytokine exosomes inflammasome major depressive disorder microglia mitochondrial DNA mitochondrial dysfunction neuroinflammation Toll-like receptor

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外科医师的创新之路：临床问题驱动的外科学发展

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中华外科杂志 2025年第1期63卷 24-27页

作者：彭淑牖浙江大学医学院附属第二医院肝胆胰外科杭州

外科是以手术为主要治病手段的一门学科, 学习外科手术技术的过程漫长而艰辛。在进行手术操作时, 提高操作的精准度、简化流程、提升患者术后的生活质量, 是外科医师不断追求的目标。作者及其团队在四十余年的临床实践中, 通过创新发明... 详细信息

外科是以手术为主要治病手段的一门学科, 学习外科手术技术的过程漫长而艰辛。在进行手术操作时, 提高操作的精准度、简化流程、提升患者术后的生活质量, 是外科医师不断追求的目标。作者及其团队在四十余年的临床实践中, 通过创新发明优化了诸多临床实践过程中发现的问题, 不仅推动了外科技术的发展, 提高了手术的安全性和效率, 还为年轻医师树立了典范。本文阐述了作者几个具有代表性的创新技术的设计灵感来源、设计过程及初步的临床效果, 希望鼓励更多的外科医师在临床实践中积极探索与思考, 发挥创新精神, 共同为我国外科事业的发展贡献力量。

关键词：外科手术外科器械多功能解剖器捆绑式胰腺消化道吻合外科创新

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基于多源遥感数据的省域XCO_(2)变化与分析

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测绘与空间地理信息 2024年第11期47卷 29-32,40页

作者：高淑贤彭雨欣李文博殷诗婷马保东东北大学资源与土木工程学院辽宁沈阳110819

利用卫星监测XCO_(2)变化已成为一种有效手段。根据2009—2021年的GOSAT卫星数据并结合夜光遥感数据、净初级生产力遥感数据,探究辽宁省近13年XCO_(2)变化趋势,获取XCO_(2)变化的影响因素及XCO_(2)变化造成的影响。研究表明,自2009年起... 详细信息

利用卫星监测XCO_(2)变化已成为一种有效手段。根据2009—2021年的GOSAT卫星数据并结合夜光遥感数据、净初级生产力遥感数据,探究辽宁省近13年XCO_(2)变化趋势,获取XCO_(2)变化的影响因素及XCO_(2)变化造成的影响。研究表明,自2009年起辽宁省XCO_(2)便处于稳定增长趋势,且辽东地区XCO_(2)总体高于辽西地区;通过相关系数计算得,夜光遥感数据与GOSAT数据相关系数较高,说明人类活动与XCO_(2)变化关系密切;NPP数据与XCO_(2)相关系数较低,说明植物的固碳能力并不是影响XCO_(2)变化的主要因素。相关研究可为省域范围的大气CO_(2)排放监测与治理提供一定的决策支持。

关键词： CO_(2)柱浓度混合比 GOSAT卫星数据夜光遥感数据净初级生产力遥感数据

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On Klein tunneling of low-frequency elastic waves in hexagonal topological plates

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Applied Mathematics and Mechanics(English Edition) 2024年第7期45卷 1139-1154页

作者： yuxin YAO Yuansheng MA Fang HONG Kai ZHANG Tingting WANG Haijun peng Zichen DENG School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an710072China MIIT Key Laboratory of Dynamics and Control of Complex Systems Northwestern Polytechnical UniversityXi’an710072China State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of TechnologyDalian116024Liaoning ProvinceChina

Incident particles in the Klein tunnel phenomenon in quantum mechanics can pass a very high potential *** the concept of tunneling into the analysis of phononic crystals can broaden the application *** this study,the structure of the unit cell is designed,and the low frequency(<1 k Hz)valley locked waveguide is realized through the creation of a phononic crystal plate with a topological phase transition *** defect immunity of the topological waveguide is verified,that is,the wave can propagate along the original path in the cases of impurities and ***,the tunneling phenomenon is introduced into the topological valley-locked waveguide to analyze the wave propagation,and its potential applications(such as signal separators and logic gates)are further explored by designing phononic crystal *** research has broad application prospects in information processing and vibration control,and potential applications in other directions are also worth exploring.

关键词： topological metamaterial elastic wave Klein tunneling valley-locked waveguide

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Generation of high-contrast, joule-level pulses based on Nd:glass chirped pulse amplification laser

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High Power Laser Science and Engineering 2016年第4期4卷 1-6页

作者： Xiaoming Lu Yujie peng Yanyan Li Xinliang Wang Xiaoyang Guo Yi Xu yuxin Leng State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences School of Physics Science and Engineering Tongji University

We demonstrate a high-contrast, joule-level Nd:glass laser system operating at 0.5 Hz repetition rate based on a double chirped pulse amplification(CPA) scheme. By injecting high-contrast, high-energy seed pulses into the Nd:glass CPA stage, the pulse energy is amplified to 1.9 J through two optical parametric CPA stages and two Nd:glass amplifiers. The temporal contrast of compressed pulse is measured down to the level of 10^(-8)at tens of ps, and 10^(-10) near 200 ps before the main pulse, respectively.

关键词： chirped pulse amplification Nd glass temporal contrast

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