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Journal of Analysis and Testing 2020年第2期4卷 114-121页

作者： Xiao-Ru Liu man-ping qian Hong-Lan Qi Cheng-Xiao Zhang Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710062People’s Republic of China

A simple and sensitive electrogenerated chemiluminescence(ECL)sensor array was developed for the discrimination of three biothiols,including homocysteine(Hcy),cysteine(Cys)and glutathione(GSH)using two bis-cyclometalated Ir(Ⅲ)complexes as ECL *** aldehyde groups bearing bis-cyclometalated Ir(Ⅲ)complexes were selected as ECL probes,including[(bt)2Ir(phen-CHO)]PF_(6)(bt=2-phenylbenzothiazole,phen-CHO=1,10-phenanthroline-5-carboxaldehyde,probe 1)and[(ppy)_(2)Ir(phen-CHO)]PF_(6)(ppy=2-phenylpyridine,probe 2).A“signal on”ECL method was proposed for biothiols assay based on the increase in ECL intensity of two ECL probes by *** biothiols can be detected with detection limits of 0.8,0.7 and 0.8μM by probe 1 and 0.3,0.4 and 0.5μM by probe 2 for Cys,Hcy and GSH,***-element sensor array was assembled for the detection of three biothiols due to the different enhancement effects of biothiols on the ECL intensity of two ECL *** ECL sensor array combining with the principal component analysis was applied to discriminate three *** study demonstrates that the ECL sensor array using dual ECL reagents provides a promis-ing way for the discrimination of multiple biothiols with good sensitivity and simpleness.

关键词： ECL Sensor array Biothiols Ir(Ⅲ)complex Principal component analysis

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石墨烯褶皱结构对双电层储能性能的理论研究

原子与分子物理学报 2025年第6期42卷 89-100页

作者：张倩蒋更平武汉科技大学理学院应用物理系武汉430081

石墨烯因其出色的比表面积和单层结构而被广泛认为是一种理想的电极材料.然而,实验制备的石墨烯常因官能团、缺陷和位错的引入而出现褶皱和变形.针对这一问题,本文构建了一系列具有不同幅度褶皱(a=0~6.6?)的石墨烯片,并运用分子动力学... 详细信息

石墨烯因其出色的比表面积和单层结构而被广泛认为是一种理想的电极材料.然而,实验制备的石墨烯常因官能团、缺陷和位错的引入而出现褶皱和变形.针对这一问题,本文构建了一系列具有不同幅度褶皱(a=0~6.6?)的石墨烯片,并运用分子动力学模拟来研究这些褶皱石墨烯表面的双电层结构.本研究旨在探讨不同褶皱高度和充电状态下双电层的变化规律,及其与超级电容器储能性能之间的关系.研究发现,褶皱石墨烯模型内部的离子浓度随电压的增加呈现多峰层状分布,而表面离子浓度与施加的电压正相关.此外,石墨烯的褶皱结构能够减少离子和水对电极电压响应的敏感性.在不同电压条件下,褶皱型石墨烯结构的面积比电容(C_A)始终高于其平面对应区域,突出了其在提升双电层储能性能上的优势.本研究揭示了石墨烯褶皱结构在调节离子分布、降低电压敏感性,以及增强电化学储能性能方面的特有作用机制.

关键词：双电层石墨烯褶皱恒电势模拟方法

Diverse Hf-Q Chains Existing in the Ternary Eu-Hf-Q(Q = S, Se) System

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Chinese Journal of Structural Chemistry 2020年第3期39卷 437-442,376页

作者： XU qian-Ting CHEN man-man JI Shen-Jing GUO Sheng-ping School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China

Two ternary Eu-Hf-Q(Q = S, Se) chalcogenides, EuHfSe3(1) and Eu5 Hf3 S12(2), have been synthesized by a facile solid state routine and structurally characterized by single-crystal X-ray diffraction technique. They crystallize in the orthorhombic space group Pnma(1) or hexagonal P 6 2 m(2), and diverse Hf-Q chains exist in their 3 D structures. The electronic structure of 1 is also calculated according to density functional theory.

关键词： rare-earth chalcogenide solid-state synthesis crystal structure theory calculation

Global trends and hotspots of type 2 diabetes in children and adolescents:A bibliometric study and visualization analysis

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World Journal of Diabetes 2025年第1期16卷 140-168页

作者： Fang-Shuo Zhang Hai-Jing Li Xue Yu Yi-ping Song Yan-Feng Ren Xuan-Zhu qian Jia-Li Liu Wen-Xun Li Yi-Ran Huang Kuo Gao School of Acupuncture-Moxibustion and Tuina Beijing University of Chinese MedicineBeijing 100029China School of Traditional Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China

BACKGROUND Epidemiological surveys indicate an increasing incidence of type 2 diabetes mellitus(T2DM)among children and adolescents *** to rapid disease progression,severe long-term cardiorenal complications,a lack of effective treatment strategies,and substantial socioeconomic burdens,it has become an urgent public health issue that requires management and *** T2DM differs from adult *** a significant increase in our understanding of youth-onset T2DM over the past two decades,the related review and evidence-based content remain *** To visualize the hotspots and trends in pediatric and adolescent T2DM research and to forecast their future research *** This study utilized the terms“children”,“adolescents”,and“type 2 diabetes”,retrieving relevant articles published between 1983 and 2023 from three citation databases within the Web of Science Core Collection(SCI,SSCI,ESCI).Utilizing CiteSpace and VoSviewer software,we analyze and visually represent the annual output of literature,countries involved,and participating *** allows us to predict trends in this research *** analysis encompasses co-cited authors,journal overlays,citation overlays,time-zone views,keyword analysis,and reference analysis,*** A total of 9210 articles were included,and the annual publication volume in this field showed a steady growth *** United States had the highest number of publications and the highest *** United States also had the most research institutions and the strongest research *** global hot journals were primarily diabetes professional journals but also included journals related to nutrition,endocrinology,and *** analysis showed that research related to endothelial dysfunction,exposure risk,cardiac metabolic risk,changes in gut microbiota,the impact on comorbidities and outcomes,etc.,were emerging *** have maintained their popularity in this field,sugges

关键词： Child Adolescent Type 2 diabetes mellitus Bibliometrics Knowledge mapping Visualization CiteSpace VOSviewer

Maximizing the Minimum and Maximum Forcing Numbers of Perfect Matchings of Graphs

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Acta Mathematica Sinica,English Series 2023年第7期39卷 1289-1304页

作者： qian qian LIU He ping ZHANG School of Mathematics and Statistics Lanzhou UniversityLanzhou 730000China

Let G be a simple graph with 2n vertices and a perfect *** forcing number f(G,M) of a perfect matching M of G is the smallest cardinality of a subset of M that is contained in no other perfect matching of *** all perfect matchings M of G,the minimum and maximum values of f(G,M) are called the minimum and maximum forcing numbers of G,denoted by f(G) and F(G),*** f(G)≤F(G) ≤*** and Chen(2011) proposed an open problem:how to characterize the graphs G with f(G)=*** they showed that for a bipartite graph G,f(G)=n-1 if and only if G is complete bipartite graph K_(n,n).In this paper,we completely solve the problem of Che and Chen,and show that f(G)=n-1 if and only if G is a complete multipartite graph or a graph obtained from complete bipartite graph K_(n,n) by adding arbitrary edges in one partite *** all graphs G with F(G)=n-1,we prove that the forcing spectrum of each such graph G forms an integer interval by matching 2-switches and the minimum forcing numbers of all such graphs G form an integer interval from [n/2] to n-1.

关键词： Perfect matching minimum forcing number maximum forcing number forcing spectrum complete multipartite graph

Emerging roles of astrocytes in blood-brain barrier disruption upon amyloid-beta insults in Alzheimer's disease

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Neural Regeneration Research 2023年第9期18卷 1890-1902页

作者： qian Yue Maggie Pui man Hoi State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoMacao Special Administrative RegionChina Department of Pharmaceutical Sciences Faculty of Health SciencesUniversity of MacaoMacao Special Administrative RegionChina

Blood-brain barrier disruption occurs in the early stages of Alzheimer’s *** studies indicate a link between blood-brain barrier dysfunction and cognitive decline and might accelerate Alzheimer’s disease *** are the most abundant glial cells in the central nervous system with important roles in the structural and functional maintenance of the blood-brain *** example,astrocytic cove rage around endothelial cells with perivascular endfeet and secretion of homeostatic soluble factors are two major underlying mechanisms of astrocytic physiological *** activation is often observed in Alzheimer’s disease patients,with astrocytes expressing a high level of glial fibrillary acid protein detected around amyloid-beta plaque with the elevated phagocytic ability for *** alte rations in Alzheimer’s disease astrocytes including swollen endfeet,somata shrinkage and possess loss contribute to disruption in vascular integrity at capillary and arte rioles *** addition,Alzheimer’s disease astrocytes are skewed into proinflammatory and oxidative profiles with increased secretions of vasoactive mediators inducing endothelial junction disruption and immune cell *** this review,we summarize the findings of existing literature on the relevance of astrocyte alte ration in response to amyloid pathology in the context of blood-brain barrier ***,we briefly describe the physiological roles of astrocytes in blood-brain barrier ***,we review the clinical evidence of astrocyte pathology in Alzheimer’s disease patients and the preclinical evidence in animal and cellular *** further discuss the structural changes of blood-brain barrier that correlates with Alzheimer’s disease ***,we evaluate the roles of soluble factors secreted by Alzheimer’s disease astrocytes,providing potential molecular mechanisms underlying blood-brain barrier *** conclude with a

关键词： Alzheimer’s disease amyloid-beta astrocyte(astroglial)-endothelial interaction astrocyte pathology blood-brain barrier blood-brain barrier disruption brain endothelial cell neuroinflammation reactive astrocyte

Assessment of anterior chamber angle changes after phacoemulsification with swept-source OCT

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International Journal of Ophthalmology(English edition) 2021年第10期14卷 1527-1532页

作者： qian Zheng man Hu Zhang-Liang Li ping-Jun Chang Yun-E Zhao Eye Hospital and School of Ophthalmology and Optometry Wenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina National Clinical Research Center for Ocular Diseases Wenzhou 325027Zhejiang ProvinceChina

AIM:To assess the changes of anterior chamber angle in patients with shallow anterior chamber after phacoemulsification combined with intraocular lens(IOL)implantation,based on anterior segment swept-source optical coherence tomography(AS-SS-OCT)***:This was a prospective case control study;sixty eyes of sixty case were scheduled for cataract surgery with normal intraocular pressure(IOP).Based on anterior chamber depth(ACD)and gonioscopy findings,the eyes were divided into two groups:group of shallow anterior chamber and narrow angle(SAC group,30 eyes);and group of normal anterior chamber group with wide angle(NAC group,30 eyes).Measurements of ACD,anterior chamber volume(ACV),iris volume(IV),lens vault(LV),angle opening distance(AOD),angle recess area(ARA),trabecular iris space area(TISA),and trabecular iris angle(TIA)were conducted in each group before and 3mo after ***:There was no significant difference in age,axial length(AL),corneal curvature,corneal diameter,intraocular pressure,and IV between two groups before surgery,except for the LV(P=0.000).ACD and ACV were prominently larger in the NAC group than the SAC group 3mo after operation(3.69±0.38 vs 3.85±0.39 mm,P=0.025;161.37±19.47 vs 178.26±20.30 mm3,P=0.002).AOD750,ARA750 in nasal and inferior quadrants,TISA750 in all quadrants except temporal,and TIA750 in all quadrants in SAC group were significantly smaller than those in NAC group after operation(all P<0.05).CONCLUSION:Cataract surgery can deepen anterior chamber and increase the width of anterior chamber angle in Chinese subjects,but the angle related parameters including AOD750,ARA750,TISA750,TIA,TISA750,and ACV in patients with shallow anterior chamber and narrow angle do not reach the normal level.

关键词： anterior chamber parameters phacoemulsification shallow anterior chamber anterior segment swept-source optical coherence tomography

Experimental investigation of the interaction between a pulsating bubble and a rigid cylinder

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Acta Mechanica Sinica 2013年第4期29卷 503-512页

作者： A-man Zhang Wei Xiao Shi-ping Wang College of Shipbuilding Engineering Harbin Engineering University

In this paper, the behavior of a bubble near a rigid cylinder is studied experimentally as the positions of bubble induction change, and several cylinders with different diam- eters are used in the experiment. The main results are as follows. The behavior of a bubble near a rigid cylinder is distinct from that near a rigid plate. When the cylinders are laid in deep water, there will occur three kinds of typical bubble shapes as the distance between bubble and cylinder increases. And the bubble shapes are different as the diam- eter of cylinder varies. When the cylinders are laid near a free surface, the behaviors of bubble near cylinders with dif- ferent diameters are similar. For a certain distance between bubble and free surface, as the distance between bubble and cylinder increases, ＂double jet＂, ＂inclined jet＂ and ＂down- ward jet＂ will take place successively.

关键词： Bubble ~ Cylinder. Electric spark- Free sur-face ~ Jet

Microstructure and mechanical properties of Ni-based composite coatings reinforced by in situ synthesized TiB_2 + TiC by laser cladding

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International Journal of Minerals,Metallurgy and Materials 2013年第1期20卷 57-64页

作者： Jun Li Xuan-jun Zhang Hui-ping Wang man-ping Li School of Materials Engineering Shanghai University of Engineering Science

A Ni-based composite coating reinforced by in situ synthesized TiB2 and TiC particles was fabricated on Ti6A14V by laser cladding. An attempt was made to correlate the thermodynamic predictions and experimental observation. The micro- structure and the microhardness profile across the coating were investigated by means of X-ray diffraction （XRD）, scanning electron microscopy （SEM）, energy dispersive spectroscopy （EDS）, and a hardness tester. It is found that the coating mainly consists of a large number of reinforcements （black blocky TiB2, flower-like or equiaxial TiC, and fine acicular CrB） and the 7 matrix. The hardness of TiB2, TiC, and CrB reinforcements is much higher than that of the 7 matrix. The dispersive distribu- tion of such high hardness reinforcements causes the increase in hardness of the whole coating. The average value of the hard- ness is approximately Hv0.2 700 in the coating. The hardness of the coating is obviously higher than that of the substrate due to the dispersion strengthening of reinforcements.

关键词： composite coatings laser cladding in situ processing microstructure mechanical properties

Paper evolution graph: multi-view structural retrieval for academic literature

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Frontiers of Information Technology & Electronic Engineering 2019年第2期20卷 187-205页

作者： Dan-ping LIAO Yun-tao qian College of Computer Science and Technology Zhejiang University

Academic literature retrieval concerns about the selection of papers that are most likely to match a user's information needs. Most of the retrieval systems are limited to list-output models, in which the retrieval results are isolated from each other. In this paper, we aim to uncover the relationships between the retrieval results and propose a method to build structural retrieval results for academic literature, which we call a paper evolution graph(PEG).The PEG describes the evolution of diverse aspects of input queries through several evolution chains of papers. By using the author, citation, and content information, PEGs can uncover various underlying relationships among the papers and present the evolution of articles from multiple viewpoints. Our system supports three types of input queries: keyword query, single-paper query, and two-paper query. The construction of a PEG consists mainly of three steps. First, the papers are soft-clustered into communities via metagraph factorization, during which the topic distribution of each paper is obtained. Second, topically cohesive evolution chains are extracted from the communities that are relevant to the query. Each chain focuses on one aspect of the query. Finally, the extracted chains are combined to generate a PEG, which fully covers all the topics of the query. Experimental results on a real-world dataset demonstrate that the proposed method can construct meaningful PEGs.

关键词： Paper evolution graph Academic literature retrieval Metagraph factorization Topic coherence