检索结果-南通市图书馆

Observation of transition from superfluorescence to polariton condensation in CsPbBr3 quantum dots film

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第2期13卷 316-324页

作者： Danqun Mao Linqi Chen zheng Sun min Zhang Zhe-Yu Shi Yongsheng Hu Long Zhang Jian Wu Hongxing Dong wei Xie Hongxing Xu State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200241China Key Laboratory of Materials for High-Power Laser Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences201800 ShanghaiChina Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuanShanxi 030006China Chongqing Key Laboratory of Precision Optics Chongqing Institute of East China Normal UniversityChongqing 401121China CAS Center for Excellence in Ultraintense Laser Science Shanghai 201800China School of Physics and Technology Center for Nanoscience and NanotechnologyWuhan UniversityWuhan 430072China

The superfluorescence effect has received extensive attention due to the many-body physics of quantum correlation in dipole gas and the optical applications of ultrafast bright radiation field based on the cooperative quantum ***,we demonstrate not only to observe the superfluorescence effect but also to control the cooperative state of the excitons ensemble by externally applying a regulatory dimension of coupling light fields.A new quasi-particle called cooperative exciton-polariton is revealed in a light-matter hybrid structure of a perovskite quantum dot thin film spin-coated on a Distributed Bragg *** the nonlinear threshold,polaritonic condensation occurs at a nonzero momentum state on the lower polariton branch owning to the vital role of the synchronized *** phase transition from superfluorescence to polariton condensation exhibits typical signatures of a decrease of the linewidth,an increase of the macroscopic coherence as well as an accelerated radiation decay *** findings are promising for opening new potential applications for super-brightness and unconventional coherent light sources and could enable the exploitation of cooperative effects for quantum optics.

关键词： quantum condensation polar

Systematic Evaluation of Guidelines for the Diagnosis and Treatment of Hepatitis E Virus Infection

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Clinical and Translational Hepatology 2024年第8期12卷 739-749页

作者： Ting Gu Cai-Ying zheng Yan-Qin Deng Xiao-Feng Yang wei-min Bao Ying-Mei Tang Department of Gastroenterology Second Affiliated Hospital of Kunming Medical UniversityKunming Medical UniversityKunmingYunnanChina Second Affiliated Hospital of Kunming Medical University KunmingYunnanChina Department of Colorectal Surgery The First People’s Hospital of Yunnan ProvinceKunmingYunnanChina

Background and Aims:The hepatitis E virus(HEV)is a zoonotic disease,and infection with HEV in humans primarily causes acute infections and can progress to chronic manifestation in immunocompromised *** the past decade,guidelines for diagnosing and treating HEV infection have been *** study aimed to systematically assess the quality of current guidelines for diagnosing and treating HEV infection,and we analyzed the differences in guideline quality and primary recommendations and explored possible reasons for these ***:Guidelines published between 2013 and 2022 were searched,and studies were identified using selection *** study assessed the quality of the included guidelines using the Appraisal of Guidelines for Research and Evaluation tool,extracted the primary recommendations in the guidelines,determined the highest level of evidence supporting the recommendations,and reclassified the evidence using the Oxford Centre for Evidence-Based Medicine grading ***:Seven guidelines were included in the final *** quality of the guidelines varied *** discrepancies may have been caused by the lack of external experts,the failure to consider influencing factors in guideline application,and the lack of consideration of the public’s *** of the heterogeneity in primary recommendations revealed differences in algorithms for managing chronic HEV infection,the dosage of ribavirin,and a low level of evidence supporting the primary ***:Guideline quality and primary recommendations vary *** by guideline developers and researchers would facilitate updating and applying guidelines for diagnosing and treating HEV infection.

关键词： Hepatitis E virus Guidelines Diagnosis Treatment Systematic Evaluation

Photochemical synthesis and group transfer reactions of azoxy compounds

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第8期35卷 1-2页

作者： Mei Peng wei-min He School of Pharmaceutical Science Hengyang Medical SchoolUniversity of South ChinaHengyang 421001China

Azoxy compounds are extensively utilized in various fields,including dyes,polymerization *** high nitrogen and oxygen content make them ideal for use as energy storage materials[1-4].Additionally,azoxy functional groups are found in various natural *** 1949,chemists successfully isolated natural congener of azoxy compounds from cycads,marking a significant ***,azoxy compounds were also discovered in mushrooms,sponges,and soil-dwelling bacteria,showing promising pharmaceutical activity,including antimicrobial,antifungal or antibacterial agents(Scheme 1)[5].

关键词： compounds synthesis sponge

A Quick Calculation Method for Radiation Pattern of Submillimeter Telescope with Deformation and Displacement

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第3期24卷 249-265页

作者： Jia You Yi-wei Yao zheng Wang School of Automation Southeast UniversityNanjing 210096China

Radiation pattern captures the electromagnetic performance of reflector antennas,which is significantly affected by the deformation of the primary reflector due to gravity and the displacement of the secondary *** the design process of large reflector antennas,a substantial amount of time is often dedicated to iteratively adjusting structural parameters and validating electromagnetic *** improve the efficiency of the design process,we first propose an approximate calculation method of optical path difference(OPD)for the deformation of the primary reflector under gravity and the displacement of the secondary *** an OPD fitting function based on the modified Zernike polynomials is proposed to capture the phase difference of radiation over the aperture plane,based on which the radiation pattern will be obtained quickly by the aperture field integration *** experiments demonstrate the effectiveness of the proposed quick calculation method for analyzing the radiation pattern of a 10.4 m submillimeter telescope antenna at its highest operating frequency of 856 *** comparison with the numerical simulation method based on GRASP(which is an antenna electromagnetic analysis tool combining physical optics(PO)and physical theory of diffraction(PTD)),the quick calculation method reduces the time for radiation pattern analysis from more than one hour to less than two ***,the quick calculation method exhibits excellent accuracy for the figure of merit(FOM)of the radiation ***,the proposed quick calculation method can obtain the radiation pattern with high speed and *** to the time-consuming numerical simulation method(PO and PTD),it can be employed for quick analysis of the radiation pattern for the lateral displacement of the secondary reflector and the deformation of the primary reflector under gravity in the design process of a reflector antenna.

关键词： instrumentation high angular resolution-methods data analysis-methods analytical

Role of Gate in Triode-Structure for Carbon Nanotube Cold Cathode

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology 2014年第3期12卷 327-330页

作者： Yong-Qing Guo wei-min zheng Xiao-Juan Zhang Department of Physics and Hydropower Engineering Gansu Normal University for Nationalities School of Physics Northwest Normal University

Field emission properties of carbon nanotube cold cathode （CNT-CC） of triode- and diode-structure have been investigated by using the finite element method of numerical simulation. Specially, the effects of gate voltage and hole radius R on the emission properties have been analyzed based on the finite element method. Results indicate that the gate can make the excitation electric field E increase, turn-on voltage decrease, and the emission current density J rise. The result shows that the E reaches its maximum value at the top of carbon nanotube （CNT）, and the optimum field emission performance can be obtained when R is equal to 10 times the diameter of the carbon nanotube.

关键词： Carbon nanotube field emission triode-structure

Spatiotemporal Changes of Snow Depth in Western Jilin,China from 1987 to 2018

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2024年第2期34卷 357-368页

作者： wei Yanlin LI Xiaofeng GU Lingjia zheng Zhaojun zheng Xingming JIANG Tao Northeast Institute of Geography and Agroecology Chinese Academy of SciencesChangchun 130102China University of Chinese Academy of Sciences Beijing 100049China Changchun Jingyuetan Remote Sensing Experiment Site Chinese Academy of SciencesChangchun 130102China College of Electronic Science and Engineering Jilin UniversityChangchun 130012 National Meteorological Satellite Meteorological Center Beijing 100081China

Seasonal snow cover is a key global climate and hydrological system component drawing considerable attention due to glob-al warming ***,the spatiotemporal snow cover patterns are challenging in western Jilin,China due to natural condi-tions and sparse ***,this study investigated the spatiotemporal patterns of snow cover using fine-resolution passive mi-crowave(PMW)snow depth(SD)data from 1987 to 2018,and revealed the potential influence of climate factors on SD *** results indicated that the interannual range of SD was between 2.90 cm and 9.60 cm during the snowy winter seasons and the annual mean SD showed a slightly increasing trend(P>0.05)at a rate of 0.009 cm/*** snowmelt periods,the snow cover contributed to an increase in volumetric soil water,and the change in SD was significantly affected by air *** correlation between SD and air temperature was negative,while the correlation between SD and precipitation was positive during December and *** March,the correlation coefficient exceeded 0.5 in Zhenlai,Da’an,Qianan,and Qianguo ***,the SD and precipitation were neg-atively correlated over western Jilin in October,and several subregions presented a negative correlation between SD and precipitation in November and April.

关键词： snow cover snow depth(SD) climate changes passive microwave(PMW) western Jilin,China

A historical review of hybrid rice breeding

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2024年第3期66卷 532-545页

作者： Xiaoming zheng Fei wei Cheng Cheng Qian Qian State Key Laboratory of Crop Gene Resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China Yazhouwan National Laboratory Sanya City 572024China

The development of germplasm resources and advances in breeding methods have led to steady increases in yield and quality of rice (Oryza sativa L.). Three milestones in the recent history of rice breeding have contributed to these increases: dwarf rice breeding, hybrid rice breeding, and super rice breeding. On the 50th anniversary of the success of three-line hybrid rice,we highlight important scientific discoveries in rice breeding that were made by Chinese scientists and summarize the broader history of the field. We discuss the strategies that could be used in the future to optimize rice breeding further in the hope that China will continue to play a leading role in international rice breeding.

关键词： Chinese experience dwarf breeding hybrid rice breeding super rice breeding

Distributed Robust Optimal Dispatch of Regional Integrated Energy Systems Based on ADMM Algorithm with Adaptive Step Size

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 852-862页

作者： Zhoujun Ma Yizhou Zhou Yuping zheng Li Yang Zhinong wei the College of Energy and Electrical Engineering Hohai UniversityNanjing 211100China State Grid Jiangsu Electric Power Co. Ltd.Nanjing 210019China State Key Laboratory ofSmart Grid Protection and Control NARI Group CorporationNanjing 211106China

This paper proposes a distributed robust optimal dispatch model to enhance information security and interaction among the operators in the regional integrated energy system(RIES).Our model regards the distribution network and each energy hub(EH)as independent operators and employs robust optimization to improve operational security caused by wind and photovoltaic(PV)power output uncertainties,with only deterministic information exchanged across *** paper also adopts the alternating direction method of multipliers(ADMM)algorithm to facilitate secure information interaction among multiple RIES operators,maximizing the benefit for each ***,the traditional ADMM algorithm with fixed step size is modified to be adaptive,addressing issues of redundant interactions caused by suboptimal initial step size settings.A case study validates the effectiveness of the proposed model,demonstrating the superiority of the ADMM algorithm with adaptive step size and the economic benefits of the distributed robust optimal dispatch model over the distributed stochastic optimal dispatch model.

关键词： Regional integrated energy system(RIES) distributed optimization robust optimization operation security energy hub(EH)

HSP110 aggravates ischemia-reperfusion injury after liver transplantation by promoting NF-κB pathway

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2024年第4期23卷 344-352页

作者： Qing-Zhi Hu Zhen-Rui Cao wei-Xiong zheng min-Jie Zhao Jun-Hua Gong Cong Chen Zhong-Jun Wu Rui Tao Department of Hepatobiliary Surgery Bishan Hospital of Chongqing Medical UniversityChongqing 402760China Department of Cardiothoracic Surgery the First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China c Department of Hepatobiliary Surgery the First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Hepatobiliary Surgery the Second Affiliated Hospital of Chongqing Medical UniversityChongqing 400010China

Background:Ischemia-reperfusion injury(IRI)poses a significant challenge to liver transplantation(LT).The underlying mechanism primarily involves overactivation of the immune *** shock protein 110(HSP110)functions as a molecular chaperone that helps stabilize protein ***:An IRI model was established by performing LT on Sprague-Dawley rats,and HSP110 was silenced using ***-eosin staining,TUNEL,immunohistochemistry,ELISA and liver enzyme analysis were performed to assess IRI following *** blotting and quantitative reverse transcription-polymerase chain reaction were conducted to investigate the pertinent molecular ***:Our findings revealed a significant increase in the expression of HSP110 at both the mRNA and protein levels in the rat liver following LT(P<0.05).However,when rats were injected with siRNAHSP110,IRI subsequent to LT was notably reduced(P<0.05).Additionally,the levels of liver enzymes and inflammatory chemokines in rat serum were significantly reduced(P<0.05).Silencing HSP110 with siRNA resulted in a marked decrease in M1-type polarization of Kupffer cells in the liver and downregulated the NF-κB pathway in the liver(P<0.05).Conclusions:HSP110 in the liver promotes IRI after LT in rats by activating the NF-κB pathway and inducing M1-type polarization of Kupffer *** HSP110 to prevent IRI after LT may represent a promising new approach for the treatment of LT-associated IRI.

关键词： Ischemia-reperfusion injury Liver transplantation Inflammation HSP110 Heat shock proteins NF-κB