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Self-assembly of perovskite nanocrystals:From driving forces to applications

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Journal of Energy Chemistry 2024年第1期88卷 561-578,I0013页

作者： Yi Li fei zhang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China

Self-assembly of metal halide perovskite nanocrystals(NCs)into superlattices can exhibit unique collective properties,which have significant application values in the display,detector,and solar cell *** review discusses the driving forces behind the self-assembly process of perovskite NCs,and the commonly used self-assembly methods and different self-assembly structures are ***,we summarize the collective optoelectronic properties and application areas of perovskite superlattice ***,we conclude with an outlook on the potential issues and future challenges in developing perovskite NCs.

关键词： Self-assembly Metal halide perovskite Nanocrystals Driving forces

Pollution source identification methods and remediation technologies of groundwater: A review

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China Geology 2024年第1期7卷 125-137页

作者： ya-ci Liu Yu-hong fei ya-song Li Xi-lin Bao Peng-wei zhang Fujian Provincial Key Laboratory of Water Cycling and Eco-Geological Processes Institute of Hydrogeology and Environmental GeologyChinese Academy of Geological SciencesXiamen 361000China Key Laboratory of Water and Soil Resources Conservation and Restoration in the Middle and Lower Reaches of Yellow River Basin MNRZhengzhou 450016China

Groundwater is an important source of drinking *** pollution severely endangers drinking water safety and sustainable social *** the case of groundwater pollution,the top priority is to identify pollution sources,and accurate information on pollution sources is the premise of efficient ***,an appropriate pollution remediation scheme should be developed according to information on pollution sources,site conditions,and economic *** methods for identifying pollution sources mainly include geophysical exploration,geochemistry,isotopic tracing,and numerical *** these identification methods,only the numerical modeling can recognize various information on pollution sources,while other methods can only identify a certain aspect of pollution *** remediation technologies of groundwater can be divided into in-situ and ex-situ remediation technologies according to the remediation *** in-situ remediation technologies enjoy low costs and a wide remediation range,but their remediation performance is prone to be affected by environmental conditions and cause secondary *** ex-situ remediation technologies boast high remediation efficiency,high processing capacity,and high treatment concentration but suffer high *** methods for pollution source identification and remediation technologies are applicable to different *** achieve the expected identification and remediation results,it is feasible to combine several methods and technologies according to the actual hydrogeological conditions of contaminated sites and the nature of ***,detailed knowledge about the hydrogeological conditions and stratigraphic structure of the contaminated site is the basis of all work regardless of the adopted identification methods or remediation technologies.

关键词： Groundwater pollution Identification of pollution sources Geophysical exploration identification Geochemistry identification Isotopic tracing Numerical modeling Remediation technology Hydrogeological conditions Hydrogeological survey engineering

Light-responsive Self-Immolative L-glutamic Acid-based Polyester Nanoparticles for Controlled Drug Release via Passerini Three-Component Polymerization

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Chinese Journal of Polymer Science 2024年第5期42卷 570-578,I0005页

作者： Xiao-fei Sun Xu zhang Shu-Ping Song ya-Qun yao yan zhang Cheng-Liang Wang Jing-Jiang Sun Qing-Fu Wang Key Laboratory of Rubber-plastics Ministry of EducationSchool of Polymer Science and EngineeringQingdao University of Science and TechnologyQingdao266042China Qingdao Research Academy of Environmental Science Qingdao266012China

L-glutamic acid(LA)is a bio-based,non-toxic,environmentally friendly material derived from *** present study reports the application of Passerini three-component polymerization(P-3CP)for the straightforward preparation of LA-based light-responsive polyesters(PLTDs)under mild *** with molar masses up to 8500 g/mol and high yields exceeding 90%are *** chemical structures and light-responsive self-immolative behavior of PLTDs are comprehensively characterized by employing ultraviolet-visible(UV-Vis)spectroscopy,size exclusion chromatography(SEC),nuclear magnetic resonance(NMR)spectroscopy,and liquid chromatography mass spectrometry(LC-MS).Meanwhile,monodisperse PLTD-based doxorubicin-loaded nanoparticles(PLTD-DOX-NP)(size=193 nm,PDI=0.018)are formulated by nanoprecipitation *** light-induced depolymerization,the PLTD-DOX-NP undergoes rapid decomposition,resulting in a burst release of 80%cargo within 13 ***,according to biological toxicity tests,the PLTD-NP possesses adequate biosafety,both before and after ***,the incorporation of P-3CP with biorenewable LA-based monomer adheres to the principles of green chemistry,significantly simplifying the synthetic pathway of light-responsive polymers.

关键词： L-glutamic acid Passerini three-component polymerization Light-responsive Polyester Nanoparticles

Ground state of Rydberg-dressed Bose gas confined in a toroidal trap

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Communications in Theoretical Physics 2024年第1期76卷 29-35页

作者： Lin-Xue Wang Hong-Li yang Hui Liu Si-Lin Chen ya-Jun Wang Xiao-fei zhang Department of Physics School of Physics and Information ScienceShaanxi University of Science and TechnologyXi'an 710021China Department of Basic Sciences Air Force Engineering UniversityXi'an 710051China

The experimental realization of Rydberg dressing technology in ultracold atomic systems provides another superior platform for studying novel states of matter and macroscopic quantum *** this work,based on the mean-field theory,we have investigated the ground-state phases of a two-component Bose–Einstein condensate with Rydberg interaction and confined in a toroidal *** effects of the Rydberg interaction and external potential,especially the Rydberg blockade radius,on the ground-state structure of such a system have been investigated in full parameter *** results show that the Rydberg blockade radius,which can be regarded as another controllable parameter,can be used to obtain a variety of ground-state *** interestingly,it is found that for weak Rydberg interactions,the Rydberg blockade radius breaks the spontaneous rotational symmetry of the system,leading to the formation of a discrete unit cell *** strongly interacting cases,it can be used to realize different orders of discrete rotational symmetry breaking.

关键词： Bose-Einstein condensate Rydberg dressing toroidal trap

Models for predicting hepatitis B e antigen seroconversion in response to interferon-α in chronic hepatitis B patients

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World Journal of Gastroenterology 2015年第18期21卷 5668-5676页

作者： Chang-Tai Wang ya-fei zhang Bing-Hu Sun Yu Dai Hui-Lan Zhu Yuan-Hong Xu Meng-Ji Lu Dong-Liang yang Xu Li Zhen-Hua zhang Department of Infectious Diseases the First Affiliated Hospital Anhui Medical University Department of Clinical Laboratory the First Affiliated Hospital Anhui Medical University Institute of Virology University Hospital of Essen University of Duisburg-Essen Department of Infectious Diseases Union Hospital Tongji Medical College Huazhong University of Science and Technology

AIM:To develop models to predict hepatitis B e antigen(HBe Ag)seroconversion in response to interferon(IFN)-αtreatment in chronic hepatitis B ***:We enrolled 147 treatment-nave HBe Agpositive chronic hepatitis B patients in China and analyzed variables after initiating IFN-α1b *** were tested for serum alanine aminotransferase(ALT),hepatitis B virus-DNA,hepatitis B surface antigen(HBs Ag),antibody to hepatitis B surface antigen,HBe Ag,antibody to hepatitis B e antigen(anti-HBe),and antibody to hepatitis B core antigen(anti-HBc)at baseline and 12 wk,24 wk,and 52 wk after initiating *** performed univariate analysis to identify response predictors among the *** models to predict treatment response were constructed at baseline,12 wk,and 24 ***:At baseline,the 3 factors correlating most with HBe Ag seroconversion were serum ALT level>4×the upper limit of normal(ULN),HBe Ag≤500 S/CO,and anti-HBc>11.4 S/*** 12 wk,the 3 factors most associated with HBe Ag seroconversion were HBe Ag level≤250 S/CO,decline in HBe Ag>1 log10 S/CO,and anti-HBc>11.8 S/*** 24 wk,the 3 factors most associated with HBe Ag seroconversion were HBe Ag level≤5 S/CO,anti-HBc>11.4 S/CO,and decline in HBe Ag>2 log10 S/*** variable was assigned a score of1,a score of 0 was given if patients did not have any of the 3 *** 3 factors most strongly correlating with HBe Ag seroconversion at each time point were used to build models to predict the outcome after IFN-α*** the score was 3,the response rates at the 3 time points were 57.7%,83.3%,and 84.0%,*** the score was 0,the response rates were 2.9%,0.0%,and 2.1%,***:Models with good negative and positive predictive values were developed to calculate the probability of response to IFN-αtherapy.

关键词： Chronic hepatitis B Interferon Hepatitis B e antigen Treatment Model

Removal of a guide-wire sliding into abdominal cavity via transgastric natural orifice transluminal endoscopic surgery: A case report

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World Journal of Clinical Cases 2024年第3期12卷 596-600页

作者： Shi-Ju Chen Da-ya zhang yan-Ting Lv fei-Hu Bai Graduate School Hainan Medical UniversityHaikou 571199Hainan ProvinceChina Department of Gastroenterology The Second Affiliated Hospital of Hainan Medical University570216 HaikouHainan ProvinceChina Department of Gastroenterology Clinical Medical Center of Hainan ProvinceHaikou 570216Hainan ProvinceChina

BACKGROUND Guidewire slippage into the peritoneal cavity during clinical operations is extremely ***,this paper aims to report a successful case of guidewire removal using transgastric natural orifice transluminal endoscopic surgery(NOTES).The goal is to enhance physicians'understanding of the management plan for this unique scenario and provide a valuable reference for clinical *** SUMMARY A 64-year-old man presented with abdominal distension and was diagnosed with cirrhosis combined with massive *** proceed with treatment,the patient underwent ultrasound-guided peritoneal puncture and underwent catheterization and ***,a 0.035-inch guidewire slipped into the abdominal cavity during the *** a comprehensive evaluation and consultation by a multidisciplinary team,the guidewire was successfully removed using *** This case highlights the potential consideration of transgastric NOTES removal when encountering a foreign body,such as a guidewire,within the abdominal cavity.

关键词： Guidewire Abdominal cavity Natural orifice transluminal endoscopic surgery Cirrhosis Massive ascites Case report

Elliptical encirclement control capable of reinforcing performances for UAVs around a dynamic target

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Defence Technology（防务技术） 2024年第2期32卷 104-119页

作者： fei zhang Xingling Shao Yi Xia Wendong zhang National Key Laboratory for Electronic Measurement Technology School of Instrument and ElectronicsNorth University of ChinaTaiyuan030051China

Most researches associated with target encircling control are focused on moving along a circular orbit under an ideal environment free from external ***,elliptical encirclement with a time-varying observation radius,may permit a more flexible and high-efficacy enclosing solution,whilst the non-orthogonal property between axial and tangential speed components,non-ignorable environmental perturbations,and strict assignment requirements empower elliptical encircling control to be more challenging,and the relevant investigations are still *** this line,an appointed-time elliptical encircling control rule capable of reinforcing circumnavigation performances is developed to enable Unmanned Aerial Vehicles(UAVs)to move along a specified elliptical path within a predetermined reaching *** remarkable merits of the designed strategy are that the relative distance controlling error can be guaranteed to evolve within specified regions with a designer-specified convergence ***,wind perturbations can be online counteracted based on an unknown system dynamics estimator(USDE)with only one regulating parameter and high computational *** tool demonstrates that all involved error variables are ultimately limited,and simulations are implemented to confirm the usability of the suggested control algorithm.

关键词： Elliptical encirclement Reinforced performances Wind perturbations UAVs

Partial Linear Model Averaging Prediction for Longitudinal Data

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Journal of Systems Science & Complexity 2024年第2期37卷 863-885页

作者： LI Na fei Yu zhang Xinyu Faculty of Science Kunming University of Science and TechnologyKunming 650500China School of Statistics and Mathematics Yunnan University of Finance and EconomicsKunming 650221China Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China

Prediction plays an important role in data *** averaging method generally provides better prediction than using any of its *** though model averaging has been extensively investigated under independent errors,few authors have considered model averaging for semiparametric models with correlated *** this paper,the authors offer an optimal model averaging method to improve the prediction in partially linear model for longitudinal *** model averaging weights are obtained by minimizing criterion,which is an unbiased estimator of the expected in-sample squared error loss plus a *** properties,including asymptotic optimality and consistency of averaging weights,are established under two scenarios:(i)All candidate models are misspecified;(ii)Correct models are available in the candidate *** studies and an empirical example show that the promise of the proposed procedure over other competitive methods.

关键词： Asymptotic optimality longitudinal data model averaging estimator partially linear model prediction

Cyclic Gradient Methods for Unconstrained Optimization

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Journal of the Operations Research Society of China 2024年第3期12卷 809-828页

作者： ya zhang Cong Sun School of Science Beijing University of Posts and TelecommunicationsBeijing100876China

Gradient method is popular for solving large-scale *** this work,the cyclic gradient methods for quadratic function minimization are extended to general smooth unconstrained optimization *** with nonmonotonic line search,we prove its global ***,the proposed algorithms have sublinear convergence rate for general convex functions,and R-linear convergence rate for strongly convex *** experiments show that the proposed methods are effective compared to the state of the arts.

关键词： Gradient method Unconstrained optimization Nonmonotonic line search Global convergence