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Flexibility potential of Cs_(2)BX_(6)(B=Hf,Sn,Pt,Zr,Ti;X=I,Br,Cl)with application in photovoltaic devices and radiation detectors

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Journal of Energy Chemistry 2024年第8期95卷 271-287,I0006页

作者： Songya Wang changcheng chen Shaohang Shi Ziyi Zhang Yan Cai Shuli Gao Wen chen Shuangna Guo Elyas Abduryim Chao Dong Xiaoning Guan Ying Liu Gang Liu Pengfei Lu School of Science Xi’an University of Architecture and TechnologyXi’an 710055ShaanxiChina Key Laboratory of Eco Planning&Green Building Ministry of EducationTsinghua UniversityBeijing 100080China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China School of Physics and Optoelectronic Engineering Ludong UniversityYantai 264025ShandongChina

As interest in double perovskites is growing,especially in applications like photovoltaic devices,understanding their mechanical properties is vital for device *** extensive exploration of structure and optical properties,research on mechanical aspects is *** article builds a vacancyordered double perovskite model,employing first-principles calculations to analyze mechanical,bonding,electronic,and optical *** show Cs_(2)Hfl_(6),Cs_(2)SnBr_(6),Cs_(2)SnI_(6),and Cs_(2)PtBr_(6)have Young's moduli below 13 GPa,indicating *** parameters explain flexibility variations with the changes of B and X site *** characteristic exploration reveals the influence of B and X site electronegativity on mechanical ***_(2)SnBr_(6)and Cs_(2)PtBr_(6)are suitable for solar cells,while Cs_(2)HfI_(6)and Cs_(2)TiCl_(6)show potential for semi-transparent solar *** property calculations highlight the high light absorption coefficients of up to 3.5×10^(5) cm^(-1)for Cs_(2)HfI_(6)and Cs_(2)TiCl_(6).Solar cell simulation shows Cs_(2)PtBr_(6)achieves 22.4%of conversion ***_(2)ZrCl_(6)holds promise for ionizing radiation detection with its 3.68 eV bandgap and high absorption ***-ordered double perovskites offer superior flexibility,providing valuable insights for designing stable and flexible *** understanding enhances the development of functional devices based on these perovskites,especially for applications requiring high stability and flexibility.

关键词： Double perovskite Mechanical properties Flexible Photovoltaic Radiation detectors

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脑卒中后部分偏瘫手大尺度神经环路紊乱机制的静息态fMRI研究

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中国康复医学杂志 2024年第4期39卷 515-521页

作者：梁小凤陈昌成唐朝正福建医科大学附属南平第一医院康复医学科福建省南平市353000 青田县人民医院康复医学科国家卫生健康委能力建设和继续教育中心

目的:基于静息态功能磁共振成像(functional magnetic resonance imaging,fMRI)研究慢性期左侧皮层下脑卒中后轻中度手功能障碍(部分偏瘫手)患者运动功能网络的重组模式。方法:招募32例脑卒中后部分偏瘫手患者和40例匹配的健康老年对照... 详细信息

目的:基于静息态功能磁共振成像(functional magnetic resonance imaging,fMRI)研究慢性期左侧皮层下脑卒中后轻中度手功能障碍(部分偏瘫手)患者运动功能网络的重组模式。方法:招募32例脑卒中后部分偏瘫手患者和40例匹配的健康老年对照。采集两组受试者的静息态fMRI数据,并采用Fugl-Meyer腕手运动功能量表评定患者的手功能障碍程度。采用RESTplus软件分析双侧初级运动皮层(primary motor cortex,M1)与全脑功能连接(functional connectivity,FC)的组间差异,并采用Pearson相关分析探究患者的FC模式与手功能评分之间的关系。结果:与健康老年对照相比,部分偏瘫手患者的患侧M1区与健侧感觉运动区、患侧海马和患侧颞中回的FC减弱,并且健侧M1区与患侧中央后回、健侧顶下小叶、患侧颞上回和患侧脑岛的FC也减弱。相关性分析发现,部分偏瘫手患者的健侧M1区与辅助运动区的FC强度与手功能评分正相关(r=0.67,P<0.001)。结论:慢性期左侧皮层下脑卒中后部分偏瘫手患者的运动功能网络发生了广泛的失连接重组,其中,健侧M1区与辅助运动区之间增强的FC可能是提示良好手功能结局的神经影像标记物。

关键词：脑卒中手功能障碍脑可塑性静息态功能磁共振成像功能连接

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Synthesis and luminescence properties of red-emitting M_2Si_5N_8:Eu^(2+)-based(M=Ca,Sr,Ba) phosphors by a simple nitrate reduction

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Science China(Physics,Mechanics & Astronomy) 2014年第3期57卷 433-436页

作者： chen changcheng XIE ErQing School of Materials Science and Engineering Georgia Institute of Technology School of Physical Science and Technology Lanzhou University

M2SisN8：Eu2＋-based （M=Ca, Sr, Ba） red-emitting phosphors are fabricated at relatively low temperature （1200℃） and atmos- pheric pressure using a simple solid-state reaction process. Several processing parameters are systematically investigated to optimize the phosphors structural characterization and photoluminescence performance, including the amount of europium and the properties of the precursor materials. The as-prepared M2SisNs：Eu2＋-based （M=Ca, Sr, Ba） phosphors are orange in color and are intensively emitted in the red region of 580-670 nm under 465 nm excitation.

关键词： M2SisN8:Eu2+-based phosphors nitrate reduction luminescence

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长春市大学生宿舍灰尘中邻苯二甲酸酯暴露及健康风险

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环境化学 2024年第7期43卷 2465-2476页

作者：朱荟澄陈昌成李宁潘佳敏郑娜吉林大学新能源与环境学院长春130012 中国科学院东北地理与农业生态研究所长春130102 吉林大学地下水资源与环境教育部重点实验室长春130012

内分泌干扰物邻苯二甲酸酯(phthalic acid esters,PAEs)在室内环境中广泛存在.室内灰尘作为一种复杂的环境载体,是许多污染物的源和汇,PAEs吸附在室内灰尘颗粒中可能会带来潜在的健康风险.为了补充东北地区室内灰尘中PAEs的污染信息,并... 详细信息

内分泌干扰物邻苯二甲酸酯(phthalic acid esters,PAEs)在室内环境中广泛存在.室内灰尘作为一种复杂的环境载体,是许多污染物的源和汇,PAEs吸附在室内灰尘颗粒中可能会带来潜在的健康风险.为了补充东北地区室内灰尘中PAEs的污染信息,并探索PAEs的污染特征和风险水平,在长春高校宿舍采集了107份冬季灰尘样本和20份夏季样本,分析了灰尘中PAEs的含量,并进一步研究了PAEs的分布特征、影响因素、潜在来源以及健康风险.结果表明,在冬季,宿舍灰尘中PAEs的浓度为141.94—1561.06μg·g^(-1),其中邻苯二甲酸二(2-乙基己)酯(DEHP)是最主要的PAEs污染物,平均贡献率为73.62%.装修时间、个人因素以及季节变化都会影响宿舍内PAEs的含量,其中新装修宿舍灰尘中PAEs的含量显著高于旧宿舍,女性宿舍灰尘中PAEs的浓度显著高于男性宿舍,配对的冬季灰尘中PAEs的浓度高于夏季.宿舍灰尘中PAEs的主要来源可能是个人护理品、塑料制品以及纺织品.PAEs的非致癌风险小于1,在可接受范围内,摄入途径是暴露于PAEs的主要途径.致癌性PAEs,邻苯二甲酸丁苄酯(BBP)和DEHP致癌风险为低风险,DEHP的致癌风险显著高于BBP.

关键词：邻苯二甲酸酯宿舍灰尘污染特征风险评价

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半透明钙钛矿太阳能电池的研究进展

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四川师范大学学报（自然科学版） 2024年第3期47卷 294-311,F0002页

作者：芦鹏飞王颂雅陈长城北京邮电大学集成电路学院北京100876 西安建筑科技大学理学院陕西西安710055

半透明太阳能电池因其在发电窗户、建筑集成光伏、农业温室等领域的巨大潜力而受到越来越多的关注.钙钛矿因其优异的光电性能和通用的制造方法成为了半透明太阳能电池光吸收材料的理想候选.半透明太阳能电池具有高透明度、颜色可调性等... 详细信息

半透明太阳能电池因其在发电窗户、建筑集成光伏、农业温室等领域的巨大潜力而受到越来越多的关注.钙钛矿因其优异的光电性能和通用的制造方法成为了半透明太阳能电池光吸收材料的理想候选.半透明太阳能电池具有高透明度、颜色可调性等优异性能.因此,为了保证光电转换效率的同时实现良好的透光性,科学界需要继续解决器件结构设计、吸光层和透明电极材料等问题.分析半透明钙钛矿太阳能电池在电极设计、有源层调控以及器件结构的最新研究进展,并探讨半透明钙钛矿太阳能电池当前所面临的问题和未来发展方向.

关键词：半透明钙钛矿光学性质太阳能电池透明电极器件结构

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脂质体米托蒽醌、维奈克拉、高三尖杉酯碱、奥雷巴替尼联合治疗儿童难治/复发急性髓系白血病单中心队列报告

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中国小儿血液与肿瘤杂志 2024年第2期29卷 91-96页

作者：胡文婷王卓陈长城沈树红上海交通大学医学院附属上海儿童医学中心血液肿瘤科上海200127

目的联合使用脂质体米托蒽醌、维奈克拉、高三尖杉酯碱、奥雷巴替尼治疗儿童难治/复发急性髓系白血病(AML),并评估其疗效和安全性。方法入组患者为复发AML或存在预后不良相关的分子学异常,如NUP98重排、FUS::ERG、CBFA2T3::GLIS2、FLT... 详细信息

目的联合使用脂质体米托蒽醌、维奈克拉、高三尖杉酯碱、奥雷巴替尼治疗儿童难治/复发急性髓系白血病(AML),并评估其疗效和安全性。方法入组患者为复发AML或存在预后不良相关的分子学异常,如NUP98重排、FUS::ERG、CBFA2T3::GLIS2、FLT3-ITD、-7/7q等,且一线治疗一疗程未缓解的初诊AML患者。脂质体米托蒽醌、维奈克拉、高三尖杉酯碱、奥雷巴替尼(MVHO)联合治疗,每个疗程在骨髓抑制期均给予口服左氧氟沙星及泊沙康唑预防感染。评价一疗程缓解率,客观反应率,无事件生存率和总生存率,并评价该方案的血液学毒性及感染发生率。结果入组15例患者,MVHO治疗1到2个疗程后,总反应率(CR+CRi+PR)86.7%,1个疗程缓解率(CR+Cri)80%。2例患者因治疗无反应或疾病进展终止该方案。11例接受造血干细胞移植,1例移植后复发。累积复发率为7.7%。8个月的无病生存率和总生存率分别为64.2%和100%。可评价方案安全性的共22个疗程,未发生致死性感染及出血事件。其中5个疗程未发生突破性感染,1个疗程中发生脓毒性休克,3级以上感染发生率78.2%。最常见的4级以上治疗相关副反应为粒细胞缺乏和血小板减少,发生率分别为100%和43.4%。结论 MVHO用于儿童难治/复发AML的治疗安全有效,提示该方案可能可以尝试用于儿童AML的一线治疗。

关键词：儿童急性髓系白血病难治/复发疗效安全性

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Comparative Variance and Multiple Imputation Used for Missing Values in Land Price DataSet

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Computers, Materials & Continua 2019年第9期61卷 1175-1187页

作者： Longqing Zhang Xinwei Zhang Liping Bai Yanghong Zhang Feng Sun changcheng chen Macao University of Science and Technology Macao Guangdong University of Science and Technology Dongguan523083China

Based on the two-dimensional relation table,this paper studies the missing values in the sample data of land price of Shunde District of Foshan *** software was used to eliminate the insignificant factors by stepwise regression analysis;NORM software was adopted to construct the multiple imputation models;EM algorithm and the augmentation algorithm were applied to fit multiple linear regression equations to construct five different filling *** analysis is performed on the imputation data set in order to calculate the mean and variance of each data set,and the weight is determined according to the ***,comprehensive integration is implemented to achieve the imputation expression of missing *** results showed that in the three missing cases where the PRICE variable was missing and the deletion rate was 5%,the PRICE variable was missing and the deletion rate was 10%,and the PRICE variable and the CBD variable were both *** new method compared to the traditional multiple filling methods of true value closer ratio is 75%to 25%,62.5%to 37.5%,100%to 0%.Therefore,the new method is obviously better than the traditional multiple imputation methods,and the missing value data estimated by the new method bears certain reference value.

关键词： Imputation method multiple imputations probabilistic model

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Association of traditional Chinese exercises with glycemic responses in people with type 2 diabetes:A systematic review and meta-analysis of randomized controlled trials

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Journal of Sport and Health Science 2018年第4期7卷 442-452页

作者： Ge Song changcheng chen Juan Zhang Lin Chang Dong Zhu Xueqiang Wang Department of Sports Rehabilitation Shanghai University of SportShanghai 200438China School of Wushu Shanghai University of SportShanghai 200438China Corresponding author.E-mail address：qiang897@***

Background： There is increasing evidence showing the health benefits of various forms of traditional Chinese exercises （TCEs） on the glycemic profile in people with type 2 diabetes. However, relatively little is known about the combined clinical effectiveness of these traditional exercises. This study was designed to perform a systematic review and meta-analysis of the overall effect of 3 common TCEs （Tai Ji Quan, Qigong, Ba Duan Jin） on glycemie control in adults with type 2 diabetes. Methods： We conducted an extensive database search in Cochrane Library, EMBASE, PubMed, Web of Science, EBSCO, and China National Knowledge Infrastructure on randomized controlled trials published between April 1967 and September 2017 that compared any of the 3 TCEs with a control or comparison group on glycemic control. Data extraction was performed by 2 independent reviewers. Study quality was evaluated using the Coehrane Handbook for Systematic Reviews of Interventions, which assessed the risk of bias, including sequence generation, allocation concealment, blinding, completeness of outcome data, and selective outcome reporting. The resulting quality of the reviewed studies was characterized in 3 grades representing the level of bias： low, unclear, and high. All analyses were performed using random effects models and heterogeneity was quantified. We a priori specified changes in biomarkers of hemoglobin A1 c （in percentage） and fasting blood glucose （mmol/L） as the main outcomes and triglycerides, total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein-cholesterol, 2-h plasma glucose, and fasting plasma glucose as secondary ***： A total of 39 randomized, controlled trials （Tai Ji Quan = 11; Qigong= 6; Ba Duan Jin= 22） with 2917 type 2 diabetic patients （aged 41-80 years） were identified. Compared with a control or comparison group, pooled meta-analyses of TCEs showed a significant decrease in hemoglobin Alc （mean difference （MD）= -0.67%; 95% con

关键词： Blood glucose Hypoglycemia Insulin sensitivity Physical activity

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Experimental design of paraffin/methylated melamine-formaldehyde microencapsulated composite phase change material and the application in battery thermal management system

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Journal of Materials Science & Technology 2024年第2期169卷 124-136页

作者： Que Huang Silong Wang Jichun He Dengji Xu Safaa NAbdou Mohamed MIbrahim Shiqi Sun Yanjun chen Handong Li Ben Bin Xu changcheng Liu Zeinhom M.El-Bahy Zhanhu Guo School of Environment and Safety Engineering North University of ChinaTaiyuan 030051China Institute of Advanced Energy Materials and Systems North University of ChinaTaiyuan 030051China School of Resources and Safety Engineering Central South UniversityChangsha 410010China School of Medical and BioInformation Engineering Northeastern UniversityShenyang 110819China Department of Chemistry Khurmah University CollegeTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Mechanical and Construction Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle Upon Tyne NE18STUK College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt

In order to maintain the optimal operating temperature of the battery surface and meet the demand for thermal storage technology,battery thermal management system based on phase change materials has attracted increasing *** this work,a kind of core-shell structured microcapsule was synthesized by an in-situ polymerization,where paraffin was used as the core,while methanol was applied to mod-ify the melamine-formaldehyde shell to reduce toxicity and improve thermal ***,three different types of heat conductive fillers with the same content of 10 wt.%,i.e.,nano-Al_(2)O_(3),nano-ZnO and carbon nanotubes were added,generating *** microcapsules were uniform,and were not affected by the thermal fillers,which were evenly dispersed *** composite sample with carbon nanotubes(10 wt.%)showed the highest thermal conductivity of 0.50 W/(m K)and latent heat of 139.64 J/***,according to the leakage testing and battery charge/discharge experiments,compared with Al_(2)O_(3)and ZnO,the addition of carbon nanotubes remarkably enhances the heat storage ability as latent heat from 126.98 J/g for the prepared sample with Al_(2)O_(3)and 125.86 J/g for the one with ZnO,then to 139.64 J/g,as well as dissipation performance as a cooling effect by decreasing the sur-face temperature of battery from 2%to 12%of microcapsule,composite sample with carbon nanotubes presents a broad application prospect in battery thermal management system and energy storage field.

关键词： Microcapsule Phase change material Battery Carbon nanotube Safety

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Genomic Surveillance for SARS-CoV-2 Variants: Dominance of XBB Replacement — China, January–June 2023

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China CDC weekly 2024年第15期6卷 324-331页

作者： Yenan Feng Qiudong Su Lili Li Xiaozhou He Peihua Niu Xiaojuan Guo Xiang Zhao Jing Tang Zhiyuan Jia Ji Wang changcheng Wu Baicheng Xia Zhixiao chen Yuchao Wu Jing Yang Songqi chen Cao chen Shiwen Wang Xiaoping Dong National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijingChina NHC Key Laboratory of Medical Virology and Viral Diseases National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijingChina

Introduction:In the first half of 2023,a global shift was observed towards the predominance of XBB *** faced a significant epidemic between late 2022 and early 2023 due to Omicron subvariants BA.5.2 and *** study aims to depict the evolving variant distribution among provincial-level administrative divisions(PLADs)in China and explore the factors driving the predominance of XBB ***:Sequences from local and imported coronavirus disease 2019(COVID-19)cases recorded between January 1 and June 30,2023,were *** study analyzed the changing distribution of viral variants and assessed how the prior dominance of specific variants,XBB subvariants,and imported cases influenced the prevalence of the XBB replacement ***:A total of 56,486 sequences were obtained from local cases,and 8,669 sequences were from imported *** in April,there was a shift in the prevalence of XBB from imported to local cases,with varying dominance among *** PLADs previously high in BF.7,the rise of XBB was delayed.A positive correlation was found between XBB proportions in imported cases from January to March and local cases in *** distribution pattern of XBB subvariants differed between local and imported cases within the same *** significant differences were noted in the replacement rates of XBB ***:The timing of XBB dominance differed among various PLADs in China in the first half of 2023,correlating closely with the prevalence of XBB variants among imported cases.

关键词： dominance imported distribution

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