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CaH2-promoted activity of Ni-carbonate interface for CO_(2) methanation

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Journal of Energy Chemistry 2025年第1期100卷 522-532页

作者： Jin-Peng Wang Guo-cui Mao Hui-Lin Jiang bao-Xia Dong Yun-Lei Teng School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002JiangsuChina

Transition metal-carbonate interfaces often act as active sites in heterogeneous catalytic *** interface between transition metal and metal carbonate exhibits a dynamic equilibrium during the CO_(2)hydrogenation reaction,involving surface carbonate hydrogenation and CO_(2)***,there have been few reports on engineering the activity of the interface between transition metal and alkaline earth metal carbonate for catalytic CO_(2)*** work demonstrated that the incorporation of CaH_(2)in Ni/CaCO_(3)enhances the CO_(2)methanation activity of the *** CO_(2)conversion for Ni/CaH_(2)-CaCO_(3)reached 68.5%at 400°C,which was much higher than that of the Ni/CaCO_(3)(31.6%) and Ni/CaH_(2)-CaO (42.4%) ***,the Ni/CaH_(2)-CaCO_(3)catalysts remained stable during the stability test for 24 h at 400°C and 8 *** research revealed that CaH_(2)played a crucial role in promoting the activity of the Ni-carbonate interface for CO_(2)***_(2)could modify the electronic structure of Ni and tune the structural properties of CaCO_(3)to generate medium basic sites (OH groups),which are favorable for the activation of H2and CO_(2).In-situ Fourier transform infrared spectroscopy (FTIR) analysis combined with density functional theory calculations demonstrated that CO_(2)activation occurs at the hydroxyl group (OH) on the CaH_(2)-modified Ni-carbonate surface,leading to the formation of CO_(3)H****,our study has confirmed that CO_(2)methanation over the Ni/CaH_(2)-CaCO_(3)catalysts proceeds via the formate pathway.

关键词： CO_(2)methanation Metal hydride Ni catalysts Carbonate Metal-carbonate interface

天然地震波形与工业化爆破波形振幅比对比的研究

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内陆地震 2007年第3期21卷 267-274页

作者：包翠玲新疆维吾尔自治区地震局新疆乌鲁木齐830011

选取乌鲁木齐遥测地震台记录的部分天然地震与新疆工业化爆破项目中的部分爆破资料,通过波形振幅比AS/AP以及记录在P波垂直向的初动符号的对比,总结出了识别爆破与地震的依据。工业化爆破振幅比的比值比较稳定,且小于天然地震振幅的比值... 详细信息

选取乌鲁木齐遥测地震台记录的部分天然地震与新疆工业化爆破项目中的部分爆破资料,通过波形振幅比AS/AP以及记录在P波垂直向的初动符号的对比,总结出了识别爆破与地震的依据。工业化爆破振幅比的比值比较稳定,且小于天然地震振幅的比值,而天然地震受多种因素的影响,振幅比的比值变化范围大。工业化爆破波形记录的初动向上为"+",而天然地震产生的地震波的初动符号具有四象限分布的明显规律。

关键词：天然地震工业化爆破振幅比

新疆测震台网与中国地震台网测定的地震震级对比分析

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内陆地震 2013年第2期27卷 181-188页

作者：包翠玲马宝柱新疆维吾尔自治区地震局新疆乌鲁木齐830011

选用2010～2012年间新疆境内和边邻地区MS≥4.0地震41个,以中国地震台网给出的震级为标准震级,对新疆台网记录的数字记录波形使用不同仪器分析、仿真处理。用速度量记录直接计算,将速度量记录仿真为短周期WA位移记录、中长周期SK仪记录... 详细信息

选用2010～2012年间新疆境内和边邻地区MS≥4.0地震41个,以中国地震台网给出的震级为标准震级,对新疆台网记录的数字记录波形使用不同仪器分析、仿真处理。用速度量记录直接计算,将速度量记录仿真为短周期WA位移记录、中长周期SK仪记录的勒夫波和长周期763仪记录的瑞利波位移记录计算震级,分别进行了震级偏差统计分析,初步得出震级偏差值的震级校正值,有利于提高新疆地震台网速报地震震级的准确性。

关键词：面波震级测定体波震级测定仿真震级偏差

A water probe for direct pH measurement of individual particles via micro-Raman spectroscopy

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Journal of Environmental Sciences 2025年第3期149卷 200-208页

作者： Xiaoyu cui Mingjin Tang Tong Zhu School of Environmental Science and Engineering Tianjin UniversityTianjin 300072China BIC-ESAT and SKL-ESPC College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China

The acidity of atmospheric aerosols influences fundamental physicochemical processes that affect climate and human *** recently developed a novel and facilewater-probebased method for directly measuring of the pH for micrometer-size droplets,providing a promising technique to better understand aerosol acidity in the *** complex chemical composition of fine particles in the ambient air,however,poses certain challenges to using a water-probe for pH measurement,including interference from interactions between compositions and the influence of similar compositions on water *** explore the universality of our method,it was employed to measure the pH of ammonium,nitrate,carbonate,sulfate,and chloride *** pH of particles covering a broad range(0–14)were accurately determined,thereby demonstrating that our method can be generally applied,even to alkaline ***,a standard spectral library was developed by integrating the standard spectra of common hydrated ions extracted through the *** library can be employed to identify particle composition and overcome the spectral overlap problem resulting from similar *** the spectral library,all ions were identified and their concentrations were determined,in turn allowing successful pH measurement of multicomponent(ammonium-sulfate-nitrate-chloride)*** into the synergistic effect of Cl^(–),NO_(3)^(–),and NH_(4)^(+)depletion obtained with our approach revealed the interplay between pH and volatile *** the ubiquity of component partitioning and pH variation in particles,the water probemay provide a new perspective on the underlying mechanisms of aerosol aging and aerosol–cloud interaction.

关键词： Particle pH Water probe Standard spectral library Micro-Raman spectroscopy Direct measurement

Heterogeneity of mature oligodendrocytes in the central nervous system

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Neural Regeneration Research 2025年第5期20卷 1336-1349页

作者： Chao Weng Adam M.R.Groh Moein Yaqubi Qiao-ling cui Jo Anne Stratton G.R.Wayne Moore Jack P.Antel Neuroimmunology Unit Montreal Neurological Institute-HospitalDepartment of Neurology and NeurosurgeryMcGill UniversityMontrealQCCanada Department of Neurology Renmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina

Mature oligodendrocytes form myelin sheaths that are crucial for the insulation of axons and efficient signal transmission in the central nervous *** evidence has challenged the classical view of the functionally static mature oligodendrocyte and revealed a gamut of dynamic functions such as the ability to modulate neuronal circuitry and provide metabolic support to *** the recognition of potential heterogeneity in mature oligodendrocyte function,a comprehensive summary of mature oligodendrocyte diversity is *** delve into early 20th-century studies by Robertson and Río-Hortega that laid the foundation for the modern identification of regional and morphological heterogeneity in mature ***,recent morphologic and functional studies call into question the long-assumed homogeneity of mature oligodendrocyte function through the identification of distinct subtypes with varying myelination ***,modern molecular investigations,employing techniques such as single cell/nucleus RNA sequencing,consistently unveil at least six mature oligodendrocyte subpopulations in the human central nervous system that are highly transcriptomically diverse and vary with central nervous system *** and disease related mature oligodendrocyte variation denotes the impact of pathological conditions such as multiple sclerosis,Alzheimer's disease,and psychiatric ***,caution is warranted when subclassifying mature oligodendrocytes because of the simplification needed to make conclusions about cell identity from temporally confined *** studies leveraging advanced techniques like spatial transcriptomics and single-cell proteomics promise a more nuanced understanding of mature oligodendrocyte *** research avenues that precisely evaluate mature oligodendrocyte heterogeneity with care to understand the mitigating influence of species,sex,central nervous system region,age,and disease,

关键词： aging central nervous system diseases electron microscopy heterogeneity immunohistochemistry myelin sheath natural history neuroglia oligodendroglia single-cell gene expression analysis

Polymer Fibers Based on Dynamic Covalent Chemistry

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Chinese Journal of Polymer Science 2025年第2期43卷 245-260页

作者： Luzhi Zhang Xiaozhuang Zhou Xinhong Xiong Jiaxi cui Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou313001China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu611731China

Polymer fibers are an important class of materials throughout human history,evolving from natural fibers such as cotton and silk to modern synthetic fibers such as nylon and *** the advancement of materials science,the development of new fibers is also *** fibers based on dynamic covalent chemistry have attracted widespread attention due to their unique reversibility and *** covalent chemistry has shown great potential in improving the spinnability of materials,achieving green preparation of fibers,and introducing self-healing,recyclability,and intelligent response properties into *** this review,we divide these fiber materials based on dynamic covalent chemistry into monocomponent fibers,composite fibers,and fiber *** preparation methods,structural characteristics,functional properties,and application performance of these fibers are *** application potential and challenges of fibers based on dynamic covalent chemistry are discussed,and their future development trends are prospected.

关键词： Dynamic covalent chemistry Monocomponent fibers Composite fibers Fiber membranes

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流动台波形的综合分析

高原地震 2005年第3期17卷 35-41页

作者：包翠玲缑兰兰新疆维吾尔自治区地震局新疆乌鲁木齐830011

利用波形对比分析与多台到时对比的方法找出了流动台站记录的地震波形常规分析中存在的问题,提高了流动台资料的利用率。

关键词：综合分析流动地震台波形

A logistic-Lasso-regression-based seismic fragility analysis method for electrical equipment considering structural and seismic parameter uncertainty

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Earthquake Engineering and Engineering Vibration 2025年第1期24卷 169-186页

作者： cui Jiawei Che Ailan Li Sheng Cheng Yongfeng Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education School of Civil EngineeringHarbin Institute of TechnologyHarbin 150094China School of Ocean and Civil Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China China Electric Power Research Institute Beijing 100055China

Damage to electrical equipment in an earthquake can lead to power outage of power *** fragility analysis is a common method to assess the seismic reliability of electrical *** further guarantee the efficiency of analysis,multi-source uncertainties including the structure itself and seismic excitation need to be considered.A method for seismic fragility analysis that reflects structural and seismic parameter uncertainty was developed in this *** proposed method used a random sampling method based on Latin hypercube sampling(LHS)to account for the structure parameter uncertainty and the group structure characteristics of electrical ***,logistic Lasso regression(LLR)was used to find the seismic fragility surface based on double ground motion intensity measures(IM).The seismic fragility based on the finite element model of an±1000 kV main transformer(UHVMT)was analyzed using the proposed *** results show that the seismic fragility function obtained by this method can be used to construct the relationship between the uncertainty parameters and the failure *** seismic fragility surface did not only provide the probabilities of seismic damage states under different IMs,but also had better stability than the fragility ***,the sensitivity analysis of the structural parameters revealed that the elastic module of the bushing and the height of the high-voltage bushing may have a greater influence.

关键词： seismic fragility uncertainty logistic lasso regression ±1000 kV main transformer sensitivity analysis

Research status and prospects of the fractal analysis of metal material surfaces and interfaces

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 20-38页

作者： Qinjin Dai Xuefeng Liu Xin Ma Shaojie Tian Qinghe cui Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing 100083China Laboratory for Advanced Materials Processing of Ministry of Education University of Science and Technology BeijingBeijing 100083China School of Mechanical and Electrical Engineering Xinjiang Institute of EngineeringUrumqi 830023China

As a mathematical analysis method,fractal analysis can be used to quantitatively describe irregular shapes with self-similar or self-affine *** analysis has been used to characterize the shapes of metal materials at various scales and *** methods make it difficult to quantitatively describe the relationship between the regular characteristics and properties of metal material surfaces and ***,fractal analysis can be used to quantitatively describe the shape characteristics of metal materials and to establish the quantitative relationships between the shape characteristics and various properties of metal *** the perspective of two-dimensional planes and three-dimensional curved surfaces,this paper reviews the current research status of the fractal analysis of metal precipitate interfaces,metal grain boundary interfaces,metal-deposited film surfaces,metal fracture surfaces,metal machined surfaces,and metal wear *** relationship between the fractal dimensions and properties of metal material surfaces and interfaces is *** from three perspectives of fractal analysis,namely,research scope,image acquisition methods,and calculation methods,this paper identifies the direction of research on fractal analysis of metal material surfaces and interfaces that need to be *** is believed that revealing the deep influence mechanism between the fractal dimensions and properties of metal material surfaces and interfaces will be the key research direction of the fractal analysis of metal materials in the future.

关键词： metal material surfaces and interfaces fractal analysis fractal dimension homogeneity