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Layperson’s performance on an unconversant type of AED device:A prospective crossover simulation experimental study

World Journal of Emergency Medicine 2022年第2期13卷 98-105页

作者： Chao-yu Lei heng-wei qin Xue-jie Dong Jia-lin You Lin Zhang Shanghai Jiao Tong University School of Medicine Shanghai 200025China Department of Global Health School of Public HealthPeking UniversityBeijing 100191China School of Public Health Shanghai Jiao Tong University School of MedicineShanghai 200025China School of Nursing Shanghai Jiao Tong UniversityShanghai 200025China

BACKGROUND:Diverse models of automated external defibrillators(AEDs)possess distinctive *** study aimed to investigate whether laypersons trained with one type of AED could intelligently use another initial contact type of AED with varying ***:This was a prospective crossover simulation experimental study conducted among college *** were randomly trained with either AED1(AED1 group)or AED2(AED2 group),and the AED operation performance was evaluated individually(Phase I test).At the 6-month follow-up AED performance test(Phase II test),half of the subjects were randomly switched to use another type of AED,which formed two switches(Switch A:AED1-1 group ***2-1 group;Switch B:AED2-2 group ***1-2 group).RESULTS:A total of 224 college students participated in the *** the phase I test,a significantly higher proportion of successful defibrillation and shorter shock delivery time to achieve successful defibrillation was observed in the AED2 group than in the AED1 *** the phase II test,no statistical differences were observed in the proportion of successful defibrillation in Switch A(51.4%vs.36.6%,P=0.19)and Switch B(78.0%vs.53.7%,P=0.08).The median shock delivery time within participants achieving successful defibrillation was significantly longer in the switched group than that of the initial group in both Switch A(89[81-107]s vs.124[95-135]s,P=0.006)and Switch B(68[61.5-81.5]s vs.95.5[55-131]s,P<0.001).CONCLUSION:College students were able to effectively use AEDs different from those used in the initial training after six months,although the time to shock delivery was prolonged.

关键词： Automated external defibrillator Layperson Cardiac arrest Simulation

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Relationship between Noise,Dose,heart rate and Pitch in Cardiac dual-source CT

Relationship between Noise,Dose,heart rate and Pitch in Card...

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中国医师协会放射医师分会首届会员大会暨第四届医学影像山东论坛、山东省第16次放射学会议暨山东省第14届医学影像学学术研讨会

作者： QI heng-tao qin wei-chang SONG shao-juan LIU chuan-ya ZHAO yong-xia

Objective To explore the relationship between Noise,Dose,heart rate and Pitch in Siemens Cardiac dual-source CT. Methods Using the same CT technique and heart rate of simulation as those used for clinical CT,the water phantom was scanned with cardiac reconstruction mode in dual-source CT,the standardized deviation were measured both with reconstruction slice width of 0.6 mm at pitch=0.22,

关键词： Relationship between Noise,Dose,heart rate and Pitch in Cardiac dual-source CT

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Recent progress in constructing fluorinated solid-electrolyte interphases for stable lithium metal anodes

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 270-291页

作者： Di Zhang Pengfei Lv wei qin Xin He Yuanhua He Civil Aircraft Fire Science and Safety Engineering Key Laboratory of Sichuan Province College of Civil Aviation Safety EngineeringCivil Aviation Flight University of ChinaGuanghan 618307China School of Chemical Engineering Sichuan UniversityChengdu 610065China

Lithium metal batteries(LMBs)are emerging as a promising energy storage solution owing to their high energy density and specific ***,the non-uniform plating of lithium and the potential rupture of the solid-electrolyte interphase(SEI)during extended cycling use may result in dendrite growth,which can penetrate the separator and pose significant short-circuit *** a stable SEI is essential for the long-term operation of the ***-rich SEI has garnered significant attention for its ability to effectively passivate electrodes,regulate lithium deposition,and inhibit electrolyte *** the structural components and preparation methods of existing fluorinated SEI is crucial for optimizing lithium metal anode *** paper reviews the research on optimizing LiF passivation interfaces to protect lithium metal *** focuses on four types of compositions in fluorinated SEI that work synergistically to enhance SEI *** instance,combining compounds with LiF can further enhance the mechanical strength and ionic conductivity of the *** metals with LiF significantly improves electrochemical performance at the SEI/anode interface,with a necessary focus on reducing electron tunneling ***,incorporating polymers with LiF offers balanced improvements in interfacial toughness and ionic conductivity,though maintaining structural stability over long cycles remains a critical area for future *** alloys combined with LiF increase surface energy and lithium affinity,challenges such as dendrite growth and volume expansion *** summary,this paper emphasizes the crucial role of interfacial structures in LMBs and offers comprehensive guidance for future design and development efforts in battery technology.

关键词： LiF lithium metal anodes solid-electrolyte interphase interface cycling stability

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钛表面RGD/仿生磷酸钙复合涂层对MC3T3-E1细胞黏附、增殖、分化的影响

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口腔医学研究 2017年第7期33卷 693-697页

作者：曹亚洲程伟胡勤刚南京大学医学院附属口腔医院口腔颌面外科江苏南京210008 南京大学医学院附属口腔医院种植科江苏南京210008

目的:研究钛表面RGD/仿生磷酸钙复合涂层对MC3T3-E1细胞黏附、增殖和分化的影响。方法:1)两步法在钛表面制备仿生磷酸钙涂层,扫描电子显微镜(SEM)观察形态,X射线衍射(XRD)、傅立叶转换红外光谱(FTIR)检测表征;2)RGD固定至仿生磷酸钙涂层... 详细信息

目的:研究钛表面RGD/仿生磷酸钙复合涂层对MC3T3-E1细胞黏附、增殖和分化的影响。方法:1)两步法在钛表面制备仿生磷酸钙涂层,扫描电子显微镜(SEM)观察形态,X射线衍射(XRD)、傅立叶转换红外光谱(FTIR)检测表征;2)RGD固定至仿生磷酸钙涂层;3)实验分3组:纯钛组,钛/仿生磷酸钙涂层组,钛/RGD/仿生磷酸钙复合涂层组,细胞分别接种至3组材料表面。4)SEM观察细胞接种4h和24h的形态;5)结晶紫染色检测细胞接种4h和8h的黏附情况。6)MTT法检测细胞1、3、7d的增殖活性;7)检测细胞3、7、14d的ALP活性。结果:SEM细胞形态观察及结晶紫染色结果显示,RGD/仿生磷酸钙复合涂层组的细胞黏附效果优于对照组。MTT结果显示RGD/仿生磷酸钙复合涂层组的细胞增殖活性强于对照组。ALP检测结果显示RGD/仿生磷酸钙复合涂层组的成骨分化活性高于对照组。结论:钛表面RGD/仿生磷酸钙复合涂层对MC3T3-E1细胞的黏附、增殖、分化均有促进作用。

关键词： RGD 仿生磷酸钙涂层 MC3T3-E1细胞黏附增殖分化

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Porous Organic Cage‑Based Quasi‑Solid‑State Electrolyte with Cavity‑Induced Anion‑Trapping Effect for Long‑Life Lithium Metal Batteries

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Nano-Micro Letters 2025年第2期17卷 376-386页

作者： wei-Min qin Zhongliang Li Wen‑Xia Su Jia‑Min Hu Hanqin Zou Zhixuan Wu Zhiqin Ruan Yue‑Peng Cai Kang Li Qifeng Zheng School of Chemistry South China Normal UniversityGuangzhou 510006People’s Republic of China Key Laboratory of Functional Metal‑Organic Compounds of Hunan Province College of Chemistry and Material ScienceHengyang Normal UniversityHengyang 421008People’s Republic of China Guangzhou Key Laboratory of Energy Conversion and Energy Storage Materials Guangzhou 510006People’s Republic of China

Porous organic cages(POCs)with permanent porosity and excellent host–guest property hold great potentials in regulating ion transport behavior,yet their feasibility as solid-state electrolytes has never been testified in a practical ***,we design and fabricate a quasi-solid-state electrolyte(QSSE)based on a POC to enable the stable operation of Li-metal batteries(LMBs).Benefiting from the ordered channels and cavity-induced anion-trapping effect of POC,the resulting POC-based QSSE exhibits a high Li+transference number of 0.67 and a high ionic conductivity of 1.25×10^(−4) S cm^(−1) with a low activation energy of 0.17 *** allow for homogeneous Li deposition and highly reversible Li plating/stripping for over 2000 *** a proof of concept,the LMB assembled with POC-based QSSE demonstrates extremely stable cycling performance with 85%capacity retention after 1000 ***,our work demonstrates the practical applicability of POC as SSEs for LMBs and could be extended to other energy-storage systems,such as Na and K batteries.

关键词： Porous organic cage Cavity-induced anion-trapping Quasi-solid-state electrolyte Homogeneous Li+flux Lithium metal battery

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Persistent alterations in gray matter in COVID-19 patients experiencing sleep disturbances:a 3-month longitudinal study

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Neural Regeneration Research 2025年第10期20卷 3013-3024页

作者： Kaixuan Zhou Gaoxiong Duan Ying Liu Bei Peng Xiaoyan Zhou Lixia qin Lingyan Liang Yichen wei qingping Zhang Xiaocheng Li Haixia qin Yinqi Lai Yian Lu Yan Zhang Jiazhu Huang Jinli Huang Yinfei Ouyang Bolin Bin Mingming Zhao Jun Liu Jianrong Yang Demao Deng Guangxi Key Laboratory of Special Biomedicine School of MedicineGuangxi UniversityNanningGuangxi Zhuang Autonomous RegionChina Department of Radiology the People’s Hospital of Guangxi Zhuang Autonomous RegionGuangxi Academy of Medical SciencesNanningGuangxi Zhuang Autonomous RegionChina Department of Sleep Medicine the People’s Hospital of Guangxi Zhuang Autonomous RegionNanningGuangxi Zhuang Autonomous RegionChina Department of Radiology The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Guangxi Clinical Research Center for Sleep Medicine the People’s Hospital of Guangxi Zhuang Autonomous RegionNanningGuangxi Zhuang Autonomous RegionChina

Sleep disturbances are among the most prevalent neuropsychiatric symptoms in individuals who have recovered from severe acute respiratory syndrome coronavirus 2 *** studies have demonstrated abnormal brain structures in patients with sleep disturbances who have recovered from coronavirus disease 2019(COVID-19).However,neuroimaging studies on sleep disturbances caused by COVID-19 are scarce,and existing studies have primarily focused on the long-term effects of the virus,with minimal acute phase *** a result,little is known about the pathophysiology of sleep disturbances in the acute phase of *** address this issue,we designed a longitudinal study to investigate whether alterations in brain structure occur during the acute phase of infection,and verified the results using 3-month follow-up data.A total of 26 COVID-19 patients with sleep disturbances(aged 51.5±13.57 years,8 women and 18 men),27 COVID-19 patients without sleep disturbances(aged 47.33±15.98 years,9 women and 18 men),and 31 age-and gender-matched healthy controls(aged 49.19±17.51 years,9 women and 22 men)were included in this *** COVID-19 patients with sleep disturbances were included in a longitudinal *** found that COVID-19 patients with sleep disturbances exhibited brain structural changes in almost all brain *** cortical thicknesses of the left pars opercularis and left precuneus were significantly negatively correlated with Pittsburgh Sleep Quality Index ***,we observed changes in the volume of the hippocampus and its subfield regions in COVID-19 patients compared with the healthy *** 3-month follow-up data revealed indices of altered cerebral structure(cortical thickness,cortical grey matter volume,and cortical surface area)in the frontal-parietal cortex compared with the baseline in COVID-19 patients with sleep *** findings indicate that the sleep disturbances patients had altered morphology in the cortical an

关键词： brain structure cortical gray matter volume cortical surface area cortical thickness hippocampus magnetic resonance imaging Pittsburgh Sleep Quality Index severe acute respiratory syndrome coronavirus 2 infections sleep disturbances sub-cortical volume

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Highly Thermally Conductive Polymer/Graphene Composites with Rapid Room‑Temperature Self‑Healing Capacity

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Nano-Micro Letters 2022年第8期14卷 194-207页

作者： Huitao Yu Can Chen Jinxu Sun heng Zhang Yiyu Feng Mengmeng qin wei Feng School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials Tianjin UniversityTianjin 300350People’s Republic of China Key Laboratory of Materials Processing and Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002People’s Republic of China

Composites that can rapidly self-healing their structure and function at room temperature have broad application ***,in view of the complexity of composite structure and composition,its self-heal is facing *** this article,supramolecular effect is proposed to repair the multistage structure,mechanical and thermal properties of composite materials.A stiff and tough supramolecular frameworks of 2-[[(butylamino)carbonyl]oxy]ethyl ester(PBA)–polydimethylsiloxane(PDMS)were established using a chain extender with double amide bonds in a side chain to extend prepolymers through ***,by introducing the copolymer into a folded graphene film(FGf),a highly thermally conductive composite of PBA–PDMS/FGf with self-healing capacity was *** ratio of crosslinking and hydrogen bonding was optimized to ensure that PBA–PDMS could completely self-heal at room temperature in 10 ***,PBA–PDMS/FGf exhibits a high tensile strength of 2.23±0.15 MPa at break and high thermal conductivity of 13±0.2 W m^(−1)K^(−1);of which the self-healing efficiencies were 100%and 98.65%at room temperature for tensile strength and thermal conductivity,*** excellent self-healing performance comes from the efficient supramolecular interaction between polymer molecules,as well as polymer molecule and *** kind of thermal conductive self-healing composite has important application prospects in the heat dissipation field of next generation electronic devices in the future.

关键词： Carbon/polymer composites Self-healing capacity High thermal conductivity Molecular simulation Room temperature

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Critical thresholds for stage division of water erosion process in different ridge systems in mollisol region of Northeast China

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Journal of Mountain Science 2023年第6期20卷 1540-1560页

作者： JIAO Jian qin wei LI Kun-heng XU Hai-chao YIN Zhe HOU Shu-yan State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China Research Center on Soil and Water Conservation of the Ministry of Water Resources Beijing 100048China School of Soil and Water Conservation Beijing Forestry UniversityBeijing 100083China Heilongjiang Province Hydropower Research Institute Harbin 150070China

Extreme rainfall events on a slope under ridge tillage systems cause concentrated stream soil *** analyse the critical thresholds for different stages of water erosion process of ridge systems,simulated rainfall-erosion experiments for the contour wide ridge(CWR),contour narrow ridge(CNR),longitudinal wide ridge(LWR),and longitudinal narrow ridge(LNR)were conducted under four rainfall intensities,with slope gradients of 3°and 5°.For the runoff event,the runoff depth order was LNR>LWR>CWR>CNR;the soil loss order was CNR>LNR>CWR>*** product of slope factor(S)and rainfall erosivity(R)or runoff depth(D),can be adopted as critical thresholds for different stages of runoff and soil erosion *** the longitudinal ridge systems,R values were provided for LWR and LNR and were the beginning of sheet flow,whereas the product of rainfall erosivity and slope factor(RS)values were provided for LWR and LNR as the beginning of the accelerated concentrated *** the contour ridge systems,R values were provided for CWR and CNR as critical thresholds for the beginning of *** product of runoff depth and slope factor(DS)values were 9.98 and 7.73 mm for CWR and CNR,respectively,and were critical thresholds for the beginning of ridge failure;the DS values were 18.45 and 12.75 mm for CWR and CNR,respectively,and were critical thresholds for the beginning of the formation of ephemeral gully *** critical thresholds can distinguish different stages of soil erosion process modelling.

关键词： Runoff Soil loss Threshold Ridge failure Artificial rainfall simulation

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Corrugated Graphene Paper Reinforced Silicone Resin Composite for Efficient Interface Thermal Management

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Chinese Journal of Polymer Science 2024年第7期42卷 1002-1014,I0010页

作者： Bo-Wen Wang heng Zhang qing-Xia He Hui-Tao Yu Meng-Meng qin wei Feng Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin300350China International Engineering Institute Tianjin UniversityTianjin300350China

With the rapid development of high-power-density electronic devices,interface thermal resistance has become a critical barrier for effective heat management in high-performance electronic ***,there is an urgent demand for advanced thermal interface materials(TIMs)with high cross-plane thermal conductivity and excellent compressibility to withstand increasingly complex operating *** achieve this aim,a promising strategy involves vertically arranging highly thermoconductive graphene on ***,with the currently available methods,achieving a balance between low interfacial thermal resistance,bidirectional high thermal conductivity,and large-scale production is ***,we prepared a graphene framework with continuous filler structures in in-plane and cross-plane directions by bonding corrugated graphene to planar graphene *** interface interaction between the graphene paper framework and polymer matrix was enhanced via surface functionalization to reduce the interface thermal *** resulting three-dimensional thermal framework endows the polymer composite material with a cross-plane thermal conductivity of 14.4 W·m^(-1)·K^(-1)and in-plane thermal conductivity of 130W·m^(-1)·K^(-1)when the thermal filler loading is 10.1 wt%,with a thermal conductivity enhancement per 1 wt%filler loading of 831%,outperforming various graphene structures as *** its high thermal conductivity,low contact thermal resistance,and low compressive modulus,the developed highly thermoconductive composite material demonstrates superior performance in TIM testing compared with TFLEX-700,an advanced commercial TIM,effectively solving the interfacial heat transfer issues in electronic *** novel filler structure framework also provides a solution for achieving a balance between efficient thermal management and ease of processing.

关键词： Graphene paper Vertically aligned structure Cross-plane thermal conductivity Low compressive modulus Thermal interface material

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Simultaneous analysis of Cu and Pb as ABEDTA complexes in Rhizoma coptidis by capillary electrophoresis coupled with solid phase extraction

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Chinese Chemical Letters 2012年第5期23卷 591-594页

作者： Fan YunMeng Ying qin wei heng Lu Xin Xin Liu Jin Xin Liu Beijing Key Laboratory of Protection and Utilization of Chinese Medicine Beijing Normal UniversityBeijing 100875China School of Chemical Engineering Shandong Institute of Light IndustryJinan 250353China Institute of Natural Medicine and Chinese Medicine Resources Beijing Normal UniversityBeijing 100875China

A novel capillary electrophoresis method for simultaneous determination of Cu and Pb has been developed in this ***（Ⅱ） and Pb（Ⅱ） ions were reacted with ABEDTA to form complex to achieve an ideal sensitivity of heavy metal *** digestion solution of Rhizoma coptidis drug sample was purified by neutral Al_2O_3 column chromatography and the chromatographic behavior of metal-L complexes was *** calibration curve was linear in the range of 5-60μg/mL for Cu^（2＋） and 5-25μg/mL for Pb^（2＋） with the correlation coefficients 0.9970 and 0.9972 for each（n = 5）.The average recoveries were 86.2%for Pb and 90.1%for Cu,while the relative standard deviations were 5.1%and 3.6%*** method was successfully applied to determine Cu and Pb in *** drug samples.

关键词： Cu Pb Rhizoma coptidis Capillary electrophoresis Solid phase extraction

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