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Synthesis and transformation of zero-dimensional Cs3BiX6(X=Cl,Br)perovskite-analogue nanocrystals

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Nano Research 2020年第1期13卷 282-291页

作者： Hanjun Yang tong cai Exian Liu Katie Hills-Kimball Jianbo Gao Ou Chen Department of Chemistry Brown University324 Brook StreetProvidenceRhode Island02912USA Ultrafast Photophysics of Quantum Devices Laboratory Department of Physics and AstronomyClemson UniversityClemsonSouth Carolina29634USA

The unique structure of zero-dimensional(0D)perovskite-analogues has attracted a great amount of research interest in recent *** date,the current compositional library of 0D perovskites is largely limited to the lead-based Cs4PbX6(X=Cl,Br,and I)*** this work,we report a new synthesis of lead-free 0D Cs3BiX6(X=Cl,Br)perovskite-analogue nanocrystals(NCs)with a uniform cubic *** observe a broad photoluminescence peak centered at 390 nm for the 0D Cs3BiCl6 NCs at low *** feature originates from a self-trapped exciton *** situ thermal stability studies show that Cs3BiX6 NCs remain stable upon heating up to 200°C without crystal structural ***,we demonstrate that the Cs3BiX6 NCs can transform into other bismuth-based perovskite-analogues via facile anion exchange or metal ion insertion *** study presented here offers the opportunity for further understanding of the structure-property relationship of 0D perovskite-analogue materials,leading toward their future optoelectronic applications.

关键词： perovskite nanocrystals zero-dimensional perovskite-analogue bismuth-based perovskite post-synthetic reactions anion exchange

A knowledge-inherited learning for intelligent metasurface design and assembly

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Light(Science & Applications) 2023年第4期12卷 680-690页

作者： Yuetian Jia Chao Qian Zhixiang Fan tong cai Er-Ping Li Hongsheng Chen ZJU-UIUC Institute Interdisciplinary Center for Quantum InformationState Key Laboratory of Extreme Photonics and InstrumentationZhejiang UniversityHangzhou 310027China ZJU-Hangzhou Global Science and Technology Innovation Center Key Lab.of Advanced Micro/Nano Electronic Devices&Smart Systems of ZhejiangZhejiang UniversityHangzhou 310027China Jinhua Institute of Zhejiang University Zhejiang UniversityJinhua 321099China Air and Missile Defense College Air Force Engineering UniversityXi'an 710051China Shaoxing Institute of Zhejiang University zhejiang UniversityShaoxing321000China

Recent breakthroughs in deep learning have ushered in an essential tool for optics and photonics,recurring in various applications of material design,system optimization,and automation *** learning-enabled on-demand metasurface design has been the subject of extensive expansion,as it can alleviate the time-consuming,low-efficiency,and experience-orientated shortcomings in conventional numerical simulations and physics-based ***,collecting samples and training neural networks are fundamentally confined to predefined individual metamaterials and tend to fail for large problem *** by object-oriented C++programming,we propose a knowledge-inherited paradigm for multi-object and shape-unbound metasurface inverse *** inherited neural network carries knowledge from the"parent"metasurface and then is freely assembled to construct the"offspring"metasurface;such a process is as simple as building a container-type *** benchmark the paradigm by the free design of aperiodic and periodic metasurfaces,with accuracies that reach 86.7%.Furthermore,we present an intelligent origami metasurface to facilitate compatible and lightweight satellite communication *** work opens up a new avenue for automatic metasurface design and leverages the assemblability to broaden the adaptability of intelligent metadevices.

关键词： breakthrough consuming shortcomings

Infant formula safety concerns and consequences in China

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World Journal of Pediatrics 2014年第1期10卷 7-9页

作者： Ai-Ling Ji Yin-Ling Irene Wong tong-Jian cai Jianghong Liu Department of Nutrition&Food Hygiene and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment School of Public HealthFourth Military Medical UniversityXi'an 710032China Department of Occupational&Environmental Health School of Public HealthFourth Military Medical UniversityXi'an 710032China School of Nursing University of PennsylvaniaPhiladelphiaPA 19104USA School of Social Policy&Practice University of PennsylvaniaPhiladelphiaPA 19104USA

Food safety is an important public health problem for the entire world,especially developing *** safety incidents in China in the recent years have threatened the health of the Chinese citizens.[1]Many products,including chicken,pork,beef and rice and so on,were found to be unsafe for *** tainted with pesticides,pork tainted with clenbuterol,fish treated with cancer-causing antimicrobials,eggs colored with industrial dye,fake liquor that could induce blindness or death,exploding watermelons,and recycled"drainage oil"containing carcinogens and traces of aflatoxin have been put on the people's daily dining table.[2,3]The outcome was outrage across the *** confidence in the food industry *** turned pale at the mention of"food".Some people even started to plant vegetables in their own house.[4]

关键词： developing countries public health food industry

Ultra-thin circularly polarized lens antenna based on single-layered transparent metasurface

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Chinese Physics B 2018年第8期27卷 235-241页

作者： Kaiyue Liu Guangming Wang tong cai Wenlong Guo Yaqiang Zhuang Gang Liu Air Force Engineenng University Xi＇an 710051China

Circularly polarized （CP） lens antenna has been applied to numerous wireless communication systems based on its unique advantages such as high antenna gain, low manufacturing cost, especially stable data transmission between the transmitter and the receiver. Unfortunately, current available CP lens antennas mostly suffer from high profile, low aperture efficiency as well as complex design. In this paper, we propose an ultra-thin CP lens antenna based on the designed single- layered Pancharatnam-Berry （PB） transparent metasurface with focusing property. The PB metasurface exhibits a high transmissivity, which ensures a high efficiency of the focusing property. Launched the metasurface with a CP patch antenna at its focal point, a low-profile lens antenna is simulated and measured. The experimental results show that our lens antenna exhibits a series of advantages including high radiation gain of 20.7 dB, aperture efficiency better than 41.3%, and also narrow half power beam width （HPBW） of 13°at about 14GHz. Our finding opens a door to realize ultra-thin transparent metasurface with other functionalities or at other working frequencies.

关键词： lens antenna ultra-thin transparent Pancharatnam-Berry (PB) metasurface single-layered

How about the reporting quality of case reports in nursing field?

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World Journal of Clinical Cases 2019年第21期7卷 3505-3516页

作者： Ke-Lu Yang Cun-Cun Lu Yue Sun Yi-tong cai Bo Wang Yi Shang Jin-Hui Tian Evidence-Based Nursing Center School of NursingLanzhou UniversityLanzhou 730000Gansu ProvinceChina Evidence-Based Medicine Center School of Basic Medical SciencesLanzhou UniversityLanzhou 730000Gansu ProvinceChina Gansu Province Hospital Rehabilitation Center Lanzhou 730000Gansu ProvinceChina Lanzhou University Second Hospital Lanzhou UniversityLanzhou 730000Gansu ProvinceChina

BACKGROUND As a significantly important part of clinical practice,the professional nursing process can be advanced in many *** the fact that case reports are regarded to be of a lower quality grade in the hierarchy of evidence,one of the principles of evidence-based medicine is that decision-making should be based on a systematic summary of ***,the evidence on the reporting characteristics of case reports in the nursing field is *** To use the CARE guidelines to assess reporting quality and factors influencing the quality of case reports in the nursing *** Nursing science citation indexed(SCI-indexed)journals were identified from the professional *** of the identified journals was searched on their website for articles published before December ***-one sub-items on the CARE checklist were recorded as“YES”,“PARTLY”,or“NO”according to information reported by the included *** responses were assigned corresponding scores of 1,0.5,and 0,*** overall score was the sum of the 21 sub-items and was defined as“high”(more than 15),“medium”(10.5 to 14.5),and“low”(less than 10).The means,standard deviations,odds ratios(OR),and the associated 95%confidence interval(CI)were determined using Stata 12.0 *** Ultimately,184 case reports from 16 SCI-indexed journals were identified,with overall scores ranging from 6.5 to 18(mean=13.6±2.3).Of the included case reports,10.3%were regarded low-quality,52.7%were considered middle-quality,and 37%were regarded *** were statistical differences in the mean overall scores of the included case reports with funding versus those without funding(14.2±1.7 vs 13.6±2.4,respectively;P=0.4456)and journal impact factor<1.8 versus impact factor≥1.8(13.3±2.3 vs 13.6±2.4,respectively;P=0.4977).Five items from the CARE guidelines,5a(Patient),6(Clinical findings),8c(Diagnostic reasoning),9(Therapeutic intervention),and 11d(The main take-away lessons)were

关键词： Systematic review Case reports Case report guidelines Nursing Reporting quality Science citation indexed journals

Counterbalancing of electron and hole transfer in quantum dots for enhanced photocatalytic H_(2)evolution

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Nano Research 2023年第2期16卷 2271-2277页

作者： Ping Wang Wenwu Shi Na Jin Zhenyang Liu Yongchen Wang tong cai Katie Hills-Kimball Hanjun Yang Xiaotian Yang Yongdong Jin Xinzhong Wang Jing Zhao Ou Chen Key Laboratory of Preparation and Applications of Environmental Friendly Material of the Ministry of Education College of ChemistryJilin Normal UniversityChangchun 130103China Department of Chemistry Brown UniversityProvidenceRhode Island 02912USA State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Institute of Information Technology Shenzhen Institute of Information TechnologyShenzhen 518172China Department of Chemistry University of ConnecticutStorrsConnecticut 06269-3060USA Key Laboratory for Comprehensive Energy Saving of Cold Regions Architecture of the Ministry of Education Jilin Jianzhu UniversityChangchun 130118China

In-depth understandings of charge carrier transfer dynamics in any artificial catalytic system are of critical importance for the future design of highly efficient ***,we synthesized sub-monolayer ZnSe partial-shell coated CdSe/CdS core/shell quantum dots in a controlled *** ZnSe decorated quantum dots were employed as a model catalyst for photogeneration of H_(2)under light *** theoretical calculations and experimental results unravel that the growth of ZnSe partial-shell would retard the photogenerated electron transfer,and meanwhile,accelerate the corresponding hole migration process during the H_(2)photogeneration reaction in the artificial photocatalytic *** such,the performance of the relevant photocatalytic system can be modulated and optimized,and accordingly,a plausible underlying mechanism is rationalized.

关键词： photocatalysis hydrogen CdSe/CdS quantum dots ZnSe partial coating

Inter-Firm Linkages:Distribution Network of Patent Consulting Businesses in Cities of the Yangtze River Delta

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China City Planning Review 2021年第2期30卷 24-32页

作者： cai tong Zhang Ze Qian Fang(Translated) Tang Yan(Proofread) College of Architecture and Urban Planning Tongji UniversityShanghaiP.R.China 不详

Corporate-based networks have provided an important lens for the understanding of regional configuration,but the sole focus on intrafirm linkages limited the revealing of the whole picture of a *** this regard,this study centers at the inter-firm linkages in the Yangtze River Delta,and employs the data concerning business interactions between patent consulting companies and their clients to supplement the analysis on the urban network in the *** results show that the local administrative power represented by provincial government is still decisive in determining the economic relations among *** capital cities including Nanjing,Hangzhou,and Hefei occupy the center positions of the regional network,while Shanghai,due to its lack of administrative hinterland,fails to show significant centralized functions.A comparative analysis on urban network from multiple perspectives shows that although the Yangtze River Delta region presents the characteristics of a flat spatial structure in certain fields,significant administrative constraints are still observed in the advanced producer service functions,demonstrating a distinctive feature of market division in the *** employing new data,this study introduces a new lens for the research on urban network,and,to a certain extent,achieves a breakthrough in the existing theoretical framework of related research.

关键词： inter-firm linkages patent consulting business the Yangtze River Delta urban network

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可信承诺与政府行为负外部性的防范机制构建

上海经济研究 2006年第6期18卷 3-7,35页

作者：蔡彤武汉大学经济与管理学院 430072

在国内,政府行为外部性问题是一个全新的课题。在国外,对政府行为外部性的探讨则始于1960年代,公共选择学派及其后的经济学家在质疑政府干预微观经济有效性的讨论中逐渐形成了政府行为的外部性理论。由于政府在公共决策,提供公共物品的... 详细信息

在国内,政府行为外部性问题是一个全新的课题。在国外,对政府行为外部性的探讨则始于1960年代,公共选择学派及其后的经济学家在质疑政府干预微观经济有效性的讨论中逐渐形成了政府行为的外部性理论。由于政府在公共决策,提供公共物品的过程中产生了大量的负外部性,如何克服和防范这种负外部性导致的政府失灵引起经济学家的关注。构建可信承诺为我们提供了一个新的视角和思路。在我国,强化政府承诺的可置信并构建对应的制度基础是克服和防范政府行为负外部性的有效途径。

关键词：可信承诺政府行为

Comparison of result judgment algorithm of test for interfering factors in the bacterial endotoxins test among Chinese, Japanese, European, American, and Indian pharmacopeias

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Chinese Medical Journal 2014年第15期127卷 2784-2788页

作者： Pei Yusheng cai tong Gao Hua Tan Dejiang Zhang Yuchen Zhang Guolai National Institute for Food and Drug Control Beijing 100050 China University of Kentucky Lexington KY 40506-0055 USA

Background The bacterial endotoxins test （BET） is a method used to detect or quantify endotoxins （lipo-polysaccharide,LPS） and is widely used in the quality control of parenteral medicines/vaccines and clinical dialysis *** is also used in the diagnosis of endotoxemia and in detection of environment air quality *** BET has been adopted by most pharmacopoeias,result judgment algorithms （RJAs） of the test for interfering factors in the BET still differ between certain *** have evaluated RJAs of the test for interfering factors for the revision of BET described in the Chinese Pharmacopoeia 2010 （CHP2010）.Methods Original data from 1 748 samples were judged by RJAs of the Chinese Pharmacopoeia 2010,the Japanese Pharmacopoeia 2011 （JP2011）,the European Pharmacopoeia 7.0 （EP7.0）,the United States Pharmacopoeia 36 （USP36）,and the Indian Pharmacopoeia 2010 （IP2010）,respectively.A SAS software package was used in the statistical *** The results using CHP2010 and USP36,JP2011,EP7.0,and IP2010 had no significant difference （P=-0.7740）.The results using CHP2010 of 1 748 samples showed that 132 samples （7.6%） required an additional step; nevertheless there was no such requirement when using the other *** kappa value of two RJAs （CHP2010 and EP7.0） was 0.6900 （0.6297-0.7504） indicating that the CHP2010 and other pharmacopoeias have good *** The results using CHP2010 and USP36,JP2011,EP7.0,and IP2010 have different ***2010 method shows a good performance in Specificity,mistake diagnostic rate,agreement rate,predictive value for suspicious rate,and predictive value for passed *** CHP2010 method only had disadvantages in sensitivity compared with other *** suggest that the Chinese pharmacopoeia interference test be revised in accordance with the USP36,JP2011,EP7.0,and IP2010 judgment model.

关键词： clinical pyogenic reactions endotoxemia bacterial endotoxins test test for interfering factors result judgment algorithm pharmacopeias methodological comparison