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1Investigating spatial distribution of tourist attractions’inlinks: A case study of three mountains显示文摘In hyperlink analysis,most researchers focus on interpreting hyperlink counts,they seldom concern themselves enough about the significance of spatial distribution of hyperlinks.In this paper,we argue that not only can the inlink count to a tourist attraction’s official website reflect its attractiveness,but also the spatial distribution of its inlinks can reflect the distribution of its tourist source markets.Three mountains in Anhui Province,China,are chosen for the case study.Firstly,the correlation between the spatial distributions of an attraction’s tourist source markets and its official website’s inlinks is investigated.Secondly,the tourism indexes such as the spatial concentration index(SCI)and the attraction radius(AR),which are calculated by inlinks,are compared to the real indexes based on tourist sources.Last,the detailed discussion and analysis are presented and an improved model,which is used to calculate the distribution of inlinks,is proposed.ZHANG Yi 1,QI LiNa 2,YANG AnRan 1,SHI Lei 1 & XU Li 1 1 Institute of RS and GIS,Peking University,Beijing 100871,China 2 Center for Recreation and Tourism Research,Peking University,Beijing 100871,China 2010Science China(Technological Sciences)2010,53,S1:5
2Progress in Microwave Technology Applied to the Recovery of Precious Metals from the Secondary Resources显示文摘The recovery of precious metals from the secondary resources by microwave technology has emerged in recent years. Microwave technology as a new method for the recovery of precious metals has shown significant advantages against the conventional recovery procedures. This paper presents a review of the advances in microwave technology applied to the recovery of precious metals from the secondary resources. Many different applications are considered, including microwave-assisted leaching, microwave augmented ashing and microwave pyrolysis. In general, microwave enhanced recovery of precious metals from secondary resources.WANG Shixing PENG Jinhui CHEN Anran ZHANG Zebiao 2012贵金属2012,33,A01:3
3Effect of the pore length and orientation upon the electrochemical capacitive performance of ordered mesoporous carbons显示文摘By utilizing hard template method to adjust the mesopore length, and alkali activation to generate micro pores, two hierarchical porous carbons(HPCs) were prepared. With controlling of their mesopore length and the activation conditions, the complex system composed by HPCs and electrolyte was simplified and the effect of mesopore length on the performance of HPCs as electrodes in supercapacitors was investi gated. It is found that with the mesopore length getting smaller, the ordered area gets smaller and th aggregation occurs, which is caused by the high surface energy of small grains. HPC with long pore(HPCL) exhibits a donut-like morphology with well-defined ordered mesopores and a regular orientation while in HPC with short pores(HPCS), short mesopores are only orderly distributed in small regions Longer ordered channels form unobstructed ways for ions transport in the particles while shorter chan nels, only orderly distributed in small areas, results in blocked paths, which may hinder the electrolyt ions transport. Due to the unobstructed structure, HPCL exhibits good rate capability with a capacitanc retention rate over 86% as current density increasing from 50 m A/g to 1000 m A/g. The specific capaci tance of HPCL derived from the cyclic voltammetry test at 10 m V/s is up to 201.72 F/g, while the specifi capacitance of HPCS is only 193.65 F/g.Anran Huang Jingwang Yan Hongzhang Zhang Xianfeng Li Huamin Zhang 2017Journal of Energy Chemistry2017,26,1:2
4Integrated microdevice with a windmill-like hole array for the clog-free,efficient,and self-mixing enrichment of circulating tumor cells显示文摘Circulating tumor cells(CTCs)have tremendous potential to indicate disease progression and monitor therapeutic response using minimally invasive approaches.Considering the limitations of affinity strategies based on their cost,effectiveness,and simplicity,size-based enrichment methods that involve low-cost,label-free,and relatively simple protocols have been further promoted.Nevertheless,the key challenges of these methods are clogging issues and cell aggregation,which reduce the recovery rates and purity.Inspired by the natural phenomenon that the airflow around a windmill is disturbed,in this study,a windmill-like hole array on the SU-8 membrane was designed to perturb the fluid such that cells in a fluid would be able to self-mix and that the pressure acting on cells or the membrane would be dispersed to allow a greater velocity.In addition,based on the advantages of fluid coatings,a lipid coating was used to modify the membrane surface to prevent cell aggregation and clogging of the holes.Under the optimal conditions,recovery rates of 93%and 90%were found for A549 and HeLa cells in a clinical simulation test of our platform with a CTC concentration of 20-100 cells per milliliter of blood.The white blood cell(WBC)depletion rate was 98.7%(n=15),and the CTC detection limit was less than 10 cells per milliliter of blood(n=6).Moreover,compared with conventional membrane filtration,the advantages of the proposed device for the rapid(2 mL/min)and efficient enrichment of CTCs without clogging were shown both experimentally and theoretically.Due to its advantages in the efficient,rapid,uniform,and clog-free enrichment of CTCs,our platform offers great potential for metastatic detection and therapy analyses.Hao Li Jinze Li Zhiqi Zhang Zhen Guo Changsong Zhang Zixu Wang Qiuquan Guo Chao Li Chuanyu Li Jia Yao Anran Zheng Jingyi Xu Qingxue Gao Wei Zhang Lianqun Zhou 2022Microsystems & Nanoengineering2022,8,1:1
5Highly efficient flexible perovskite solar cells with vacuum-assisted low-temperature annealed SnO2 electron transport layer显示文摘The demand for lightweight, flexible, and high-performance portable power sources urgently requires high-efficiency and stable flexible solar cells. In the case of perovskite solar cells(PSCs), most of the common electron transport layer(ETL) needs to be annealed for improving the optoelectronic properties,while conventional flexible substrates could barely stand the high temperature. Herein, a vacuumassisted annealing SnO_(2) ETL at low temperature(100℃) is utilized in flexible PSCs and achieved high efficiency of 20.14%. Meanwhile, the open-circuit voltage(V_(oc)) increases from 1.07 V to 1.14 V. The flexible PSCs also show robust bending stability with 86.8% of the initial efficiency is retained after 1000 bending cycles at a bending radius of 5 mm. X-ray photoelectron spectroscopy(XPS), atomic force microscopy(AFM), and contact angle measurements show that the density of oxygen vacancies, the surface roughness of the SnO_(2) layer, and film hydrophobicity are significantly increased, respectively. These improvements could be due to the oxygen-deficient environment in a vacuum chamber, and the rapid evaporation of solvents. The proposed vacuum-assisted low-temperature annealing method not only improves the efficiency of flexible PSCs but is also compatible and promising in the large-scale commercialization of flexible PSCs.Xiaoguo Li Zejiao Shi Fatemeh Behrouznejad Mohammad Hatamvand Xin Zhang Yaxin Wang Fengcai Liu Haoliang Wang Kai Liu Hongliang Dong Farhan Mudasar Jiao Wang Anran Yu Yiqiang Zhan 2022Journal of Energy Chemistry2022,31,4:1
6Dental Imaging With Near-Infrared Transillumination Using Random Fiber Laser显示文摘Contrary to the conventional detection method like radiography,the near infrared light source has been demonstrated to be suitable for dental imaging due to different reflectivity among enamel,dentin,and caries lesion.In this paper,three light sources with different bandwidths based on a transillumination method are compared.The contrast among enamel,dentin,and caries lesion is calculated in different situations.The experimental results show that the random fiber laser has the best comprehensive quality in dental imaging due to its high spectral density,low coherence,and deep penetration.This work provides a guidance for light source selection in dental imaging.Jiayu GUO Yunjiang RAO Weili ZHANG Zewen CUI Anran LIU Yongmei YAN 2020Photonic Sensors2020,10,4:1
7Wide-temperature range and high safety electrolytes for highvoltage Li-metal batteries显示文摘Along with the keeping growing demand for high-energy-density energy storage system,high-voltage Li-metal batteries(LMBs)have attracted many attentions.In view of many defects of the commercial electrolytes,such as flammability,limited operation temperature range,and severe Li dendrite growth,non-flammable phosphate-based localized highly concentrated electrolytes(LHCE)have been explored as one of the safe electrolytes for LMBs.But until now there is rare report on wide-temperature range LMBs using phosphate-based electrolytes.Here,we prepare a wide-temperature LHCE,which is composed of lithium difluoro(oxalato)borate(LiDFOB),triethyl phosphate(TEP),and 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether(HFE),and explore the applicability in wide-temperature LMBs from−40 to 70℃.In the LHCE,both TEP and HFE are non-flammable,and Li^(+) is highly coordinated with TEP and DFOB^(−),which can effectively inhibit the TEP decomposition on anode,and facilitate the preferential reduction of DFOB^(−),thus obtain a robust solid electrolyte interphase(SEI)to suppress Li dendrite growth and side reactions.Therefore,this LHCE can not only endow Li/Cu and Li/Li cells with high Coulombic efficiency(CE)and long cycling lifespan,but also be applied to LiFePO_(4)(LFP)/Li and LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)(NCM523)/Li LMBs.Most importantly,the NCM523/Li LMBs with LHCE can deliver stable cycling performance at 4.5 V high-voltage and high-temperature(70℃),as well as excellent low-temperature capacity retention even though both charging and discharging process were carried out at−40℃.Anran Pan Zhicheng Wang Fengrui Zhang Lei Wang Jingjing Xu Jieyun Zheng Jianchen Hu Chenglong Zhao Xiaodong Wu 2023Nano Research2023,16,6:1
8Data-driven design of high-performance MASnxPb1-xI3 perovskite materials by machine learning and experimental realization显示文摘The photovoltaic performance of perovskite solar cell is determined by multiple interrelated factors,such as perovskite compositions,electronic properties of each transport layer and fabrication parameters,which makes it rather challenging for optimization of device performances and discovery of underlying mechanisms.Here,we propose and realize a novel machine learning approach based on forward-reverse framework to establish the relationship between key parameters and photovoltaic performance in high-profile MASnxPb1-xI3 perovskite materials.The proposed method establishes the asymmetrically bowing relationship between band gap and Sn composition,which is precisely verified by our experiments.Based on the analysis of structural evolution and SHAP library,the rapid-change region and low-bandgap plateau region for small and large Sn composition are explained,respectively.By establishing the models for photovoltaic parameters of working photovoltaic devices,the deviation of short-circuit current and open-circuit voltage with band gap in defective-zone and low-bandgap-plateau regions from Shockley-Queisser theory is captured by our models,and the former is due to the deep-level traps formed by crystallographic distortion and the latter is due to the enhanced susceptibility by increased Sn4+content.The more difficulty for hole extraction than electron is also concluded in the models and the prediction curve of power conversion efficiency is in a good agreement with Shockley-Queisser limit.With the help of search and optimization algorithms,an optimized Sn:Pb composition ratio near 0.6 is finally obtained for high-performance perovskite solar cells,then verified by our experiments.Our constructive method could also be applicable to other material optimization and efficient device development.XIA CAI FENGCAI LIU ANRAN YU JIAJUN QIN MOHAMMAD HATAMVAND IRFAN AHMED JIAYAN LUO YIMING ZHANG HAO ZHANG YIQIANG ZHAN 2022Light(Science & Applications)2022,11,9:1
9MnS hollow microspheres combined with carbon nanotubes for enhanced performance sodium-ion battery anode显示文摘MnS as anode material for sodium-ion batteries(SIBs)has recently attracted great attention because of the high theoretical capacity,great natural abundance,and low cost.However,it suffers from inferior electrical conductivity and large volume expansion during the charge/discharge process,leading to tremendous damage of electrodes and subsequently fast capacity fading.To mitigate these issues,herein,a three-dimensional(3D)interlaced carbon nanotubes(CNTs)threaded into or between MnS hollow microspheres(hollow MnS/CNTs composite)has been designed and synthesized as an enhanced anode material.It can effectively improve the electrical conductivity,buffer the volume change,and maintain the integrity of the electrode during the charging and discharging process based on the synergistic interaction and the integrative structure.Therefore,when evaluated as anode for SIBs,the hollow MnS/CNTs electrode displays enhanced reve rsible capacity(275 mAh/g at 100 mA/g after 100 cycles),which is much better than that of pure MnS electrode(25 mAh/g at 100 mA/g after 100 cycles)prepared without the addition of CNTs.Even increasing the current density to 500 mA/g,the hollow MnS/CNTs electrode still delivers a five times higher reversible capacity than that of the pure MnS electrode.The rate performance of the hollow MnS/CNTs electrode is also superior to that of pure MnS electrode at various current densities from 50 mA/g to 1000 mA/g.Na Zhang Xin Li Tianyi Hou Jinze Guo Anran Fan Shibo Jin Xiaohong Sun Shu Cai Chunming Zheng 2020Chinese Chemical Letters2020,31,5:1
10A high‐performance transition‐metal phosphide electrocatalyst for converting solar energy into hydrogen at 19.6% STH efficiency显示文摘The construction of high-efficiency and low-cost non-noble metal bifunctional electrocatalysts for water electrolysis is crucial for commercial large-scale application of hydrogen energy.Here,we report a novel strategy with erbiumdoped NiCoP nanowire arrays in situ grown on conductive nickel foam(Er-NiCoP/NF).Significantly,the developed electrode shows exceptional bifunctional catalytic activity,which only requires overpotentials of 46 and 225 mV to afford a current density of 10 mAcm^(−2) for the hydrogen evolution reaction(HER)and the oxygen evolution reaction(OER),respectively.Density functional theory calculations reveal that the appropriate Er incorporation into the NiCoP lattice can significantly modulate the electronic structure with the d-band centers of Ni and Co atoms by shifting to lower energies with respect to the Fermi level,and optimize the Gibbs free energies of HER/OER intermediates,thereby accelerating water-splitting kinetics.When assembled as a solar-driven overall water-splitting electrolyzer,the as-prepared electrode shows a high and stable solar-to-hydrogen efficiency of 19.6%,indicating its potential for practical storage of intermittent energy.Hua Zhang Abuduwayiti Aierke Yingtang Zhou Zitao Ni Ligang Feng Anran Chen Thomas Wågberg Guangzhi Hu 2023Carbon Energy2023,5,1:1
11Epidemiological and Clinical Features of Patients with Scrub Typhus—Guangzhou City,Guangdong Province,China,2012–2018显示文摘Summary What is already known about this topic?Scrub typhus(ST)causes public health challenges in the“tsutsugamushi triangle”in the Asia-Pacific area greater than 13 million square kilometers,affecting an estimated one million people each year.What is added by this report?A retrospective study based on 4,501 hospitalized patients with ST in Guangzhou City,China,described the epidemiological and clinical characteristics,laboratory findings of ST.Yuehong Wei Xiugang Guan Shixia Zhou Anran Zhang Qingbin Lu Ziwei Zhou Jinjin Chen Haiyang Zhang Yang Ji Baogui Jiang Yang Yang Zhicong Yang Hao Li Liqun Fang Wei Liu 2021China CDC weekly2021,3,51:1
12Environmentally persistent free radicals in PM_(2.5):a review显示文摘Environmentally persistent free radicals(EPFRs)are a new class of pollutants that are long-lived in fine particles(PM_(2.5)),i.e.,their 1/e lifetime ranges from days to months(or even infinite).They are capable of producing harmful reactive oxygen species such as hydroxyl radicals.The redox cycling of EPFRs is considered as an important pathway for PM_(2.5) to induce oxidative stress inside the humans,causing adverse health effects such as respiratory and cardiovascular diseases.Conse-quently,research regarding their toxicity,formation and environmental occurrences in PM_(2.5) has attracted increasing atten-tions globally during the past two decades.However,literature data in this field remain quite limited and discrete.Hence,an extensive review is urgently needed to summarize the current understanding of this topic.In this work,we systematically reviewed the analytical methods and environmental occurrences,e.g.,types,concentrations,and decay behaviors,as well as possible sources of EPFRs in PM_(2.5).The types of pretreatment methods,g-values of common EPFRs and categories of decay processes were discussed in detail.Moreover,great efforts were made to revisit the original data of the published works of EPFRs in airborne particulate matter and provided additional useful information for comparison where possible,e.g.,their mean and standard deviation of g-values,line widths(ΔHp-p),and concentrations.Finally,possible research opportunities were highlighted to further advance our knowledge of this emerging issue.Mengxia Xu Tao Wu Yu-Ting Tang Tong Chen Lavrent Khachatryan Poornima Ramesh Iyer Dengting Guo Anran Chen Miao Lyu Jinhu Li Jiaqi Liu Dan Li Yuxin Zuo Shihan Zhang Yiran Wang Yining Meng Fei Qi 2019Waste Disposal and Sustainable Energy2019,1,3:0
13Heterostructured bimetallic phosphide nanowire arrays with latticetorsion interfaces for efficient overall water splitting显示文摘Designing cost-effective and high-efficiency electrocatalysts is critical to the water splitting performance during hydrogen generation.Herein,we have developed Fe_(2)P-Co_(2)P heterostructure nanowire arrays with excellent lattice torsions and grain boundaries for highly efficient water splitting.According to the microstructural investigations and theoretical calculations,the lattice torsion interface not only contributes to the exposure of more active sites but also effectively tunes the adsorption energy of hydrogen/oxygen intermediates via the accumulation of charge redistribution.As a result,the Fe_(2)P-Co_(2)P heterostructure nanowire array exhibits exceptional bifunctional catalytic activity with overpotentials of 65 and 198 mV at 10 mA cm^(-2) for hydrogen and oxygen evolution reactions,respectively.Moreover,the Fe_(2)P-Co_(2)P/NF-assembled electrolyzer can deliver 10 mA cm^(-2) at an ultralow voltage of1.51 V while resulting in a high solar-to-hydrogen conversion efficiency of 19.8%in the solar-driven water electrolysis cell.Hua Zhang Hongyi Li Yintang Zhou Fang Tan Ruijie Dai Xijun Liu Guangzhi Hu Laiming Jiang Anran Chen Renbing Wu 2023Journal of Energy Chemistry2023,,2:0
14Screening HLA-A-restricted T cell epitopes of SARS-CoV-2 and the induction of CD8^(+)T cell responses in HLA-A transgenic mice显示文摘Since severe acute respiratory syndrome coronavirus-2(SARS-CoV-2)-specific T cells have been found to play essential roles in host immune protection and pathology in patients with coronavirus disease 2019(COVID-19),this study focused on the functional validation of T cell epitopes and the development of vaccines that induce specific T cell responses.A total of 120 CD8^(+)T cell epitopes from the E,M,N,S,and RdRp proteins were functionally validated.Among these,110,15,6,14,and 12 epitopes were highly homologous with SARS-CoV,OC43,NL63,HKU1,and 229E,respectively;in addition,four epitopes from the S protein displayed one amino acid that was distinct from the current SARS-CoV-2 variants.Then,31 epitopes restricted by the HLA-A2 molecule were used to generate peptide cocktail vaccines in combination with Poly(I:C),R848 or poly(lactic-co-glycolic acid)nanoparticles,and these vaccines elicited robust and specific CD8^(+)T cell responses in HLA-A2/DR1 transgenic mice as well as wild-type mice.In contrast to previous research,this study established a modified DC-peptide-PBL cell coculture system using healthy donor PBMCs to validate the in silico predicted epitopes,provided an epitope library restricted by nine of the most prevalent HLA-A allotypes covering broad Asian populations,and identified the HLA-A restrictions of these validated epitopes using competitive peptide binding experiments with HMy2.CIR cell lines expressing the indicated HLA-A allotype,which initially confirmed the in vivo feasibility of 9-or 10-mer peptide cocktail vaccines against SARS-CoV-2.These data will facilitate the design and development of vaccines that induce antiviral CD8^(+)T cell responses in COVID-19 patients.Xiaoxiao Jin Yan Ding Shihui Sun Xinyi Wang Zining Zhou Xiaotao Liu Miaomiao Li Xian Chen Anran Shen Yandan Wu Bicheng Liu Jianqiong Zhang Jian Li Yi Yang Haibo Qiu Chuanlai Shen Yuxian He Guangyu Zhao 2021Cellular & Molecular Immunology2021,18,12:0
15The Effect of Splenectomy on the Risk of Infection in Patients With Liver Cirrhosis显示文摘Background:Splenectomy has been reported to improve liver function as well as hypersplenism,but it is still controversial whether splenectomy will further damage the immune function of patients with liver cirrhosis.This study aims to evaluate the impact of splenectomy on the risk of infection in patients with liver cirrhosis.Methods:A total of 4355 patients with liver cirrhosis admitted to the First Affiliated Hospital of Nanjing Medical University from October 1,2016 to September 30,2020 were enrolled.The patients were first divided into the splenectomy group(SG)and the nonsplenectomy group(NSG).After standardization,patients were further divided according to the stage of cirrhosis.Infection rates in different stages were calculated,respectively.Laboratory results and infection sites of patients with cirrhosis were analyzed in combination with clinical data.Continuous variables conforming to normal distribution were presented as mean±standard deviation,compared by sample t test or paired sample t test.Non-normal variables were presented as the median(interquartile range)and compared by Mann-Whitney U test or Wilcoxon signed rank test.Results:Five hundred and two patients received splenectomy and 3853 patients did not.Bacterial infection was diagnosed in 497 of the 4355(11.41%)hospitalizations of patients with cirrhosis.The infection rate of the compensated cirrhosis SG was higher than that of the NSG(8.06%vs.5.18%,P<0.05).However,the infection rate in the SG with decompensated cirrhosis was lower than that in the NSG(11.35%vs.22.22%,P<0.001).The peak level of leukocytes did not differ significantly between the SG with compensated liver cirrhosis and the NSG[11.97(7.65)109/L vs.12.19(14.04)109/L,P>0.05].The peak value of leukocytes in SG suffering from decompensated liver cirrhosis was significantly higher than that in NSG[12.29(11.52)109/L vs.6.37(8.90)109/L,P=0.004].Patients with decompensated liver cirrhosis had a significantly higher rate of abdominal infection than patients with compensated liver cirrhosis,and splenectomy itself did not affect the sites of infection.Conclusions:Splenectomy increases the risk of infection for patients with compensated liver cirrhosis,but significantly decreases the risk in patients with decompensated liver cirrhosis.Tiantong Feng Xiaoxue Hou Wen Zhang Anran Tian Nian Chen Jun Li Chuanlong Zhu 2022Infectious Diseases & Immunity2022,2,1:0
16Efficient Simultaneous Detection of Metabolites Based on Electroenzymatic Assembly Strategy显示文摘Objective and Impact Statement:We describe an electroenzymatic mediator(EM)sensor based on an electroenzymatic assembly peak separation strategy,which can efficiently realize the simultaneous detection of 3 typical cardiovascular disease(CVD)metabolites in 5μl of plasma under one test.This work has substantial implications toward improving the efficiency of chronic CVD assessment.Introduction:Monitoring CVD of metabolites is strongly associated with disease risk.Independent and time-consuming detection in hospitals is unfavorable for chronic CVD management.Methods:The EM was flexibly designed by the cross-linking of electron mediators and enzymes,and 3 EM layers with different characteristics were assembled on one electrode.Electrons were transferred under tunable potential;3 metabolites were quantitatively detected by 3 peak currents that correlated with metabolite concentrations.Results:In this study,the EM sensor showed high sensitivity for the simultaneous detection of 3 metabolites with a lower limit of 0.01 mM.The linear correlation between the sensor and clinical was greater than 0.980 for 242 patients,and the consistency of risk assessment was 94.6%.Conclusion:Metabolites could be expanded by the EM,and the sensor could be a promising candidate as a home healthcare tool for CVD risk assessment.Anran Zheng Chao Li Shengkai Xu Zhen Guo Chuanyu Li Changsong Zhang Jia Yao Zhiqi Zhang Jinze Li Lutao Du Shasha Zhao Chuanxin Wang Wei Zhang Lianqun Zhou 2023Biomedical Engineering Frontiers2023,4,1:0
17Landing site positioning and descent trajectory reconstruction of Tianwen-1 on Mars显示文摘Tianwen-1(TW-1)is the first Chinese interplanetary mission to have accomplished orbiting,landing,and patrolling in a single exploration of Mars.After safe landing,it is essential to reconstruct the descent trajectory and determine the landing site of the lander.For this purpose,we processed descent images of the TW-1 optical obstacle-avoidance sensor(OOAS)and digital orthophoto map(DOM)of the landing area using our proposed hybrid-matching method,in which the landing process is divided into two parts.In the first,crater matching is used to obtain the geometric transformations between the OOAS images and DOM to calculate the position of the lander.In the second,feature matching is applied to compute the position of the lander.We calculated the landing site of TW-1 to be 109.9259◦E,25.0659◦N with a positional accuracy of 1.56 m and reconstructed the landing trajectory with a horizontal root mean squared error of 1.79 m.These results will facilitate the analyses of the obstacle-avoidance system and optimize the control strategy in the follow-up planetary-exploration missions.Anran Wang Li Wang Yinuo Zhang Baocheng Hua Tao Li Yang Liu Dayong Lin 2022Astrodynamics2022,6,1:0
18Stabilizing α-phase FAPbI3 solar cells显示文摘Organic–inorganic hybrid perovskite solar cells(PSCs)have been recognized as a promising and cost-effective photovoltaic technology with the power conversion efficiency(PCE) exceeding 25%[1–3]. The high efficiency is attributed to the exceptional optoelectronic properties, such as high absorption coefficient, long carrier diffusion length, low non-radiative recombination rate, and so on[4–7].Yaxin Wang Xin Zhang Zejiao Shi Lixiu Zhang Anran Yu Yiqiang Zhan Liming Ding 2022Journal of Semiconductors2022,43,4:0
19Hyperbranched phthalocyanine enabling black-phase formamidinium perovskite solar cells processing and operating in humidity open air显示文摘The extreme instability of pureα-phase FAPbI_(3) under high humidity conditions restricts the highthroughput fabrication in unmodified air environments,resulting in poor performance ofα-phase FAPbI_(3) perovskite devices obtained by scalable fabrication methods.Here we synthesized hyperbranched copper phthalocyanine(HCuPc)as a supramolecular additive with twisted phthalocyanine units to realize the molecular-level encapsulation at the grain boundaries through supramolecular interaction,which greatly broadened the processing window of FAPbI_(3) under high humidity.At the same time,unlike traditional encapsulation layer that carrier can only be collected by tunneling effect,the twisted phthalocyanine ring of HCu Pc in perovskite films is more conducive to hole extraction.Finally,a record efficiency was achieved in pure FAPbI_(3) based inverted structured solar cell by blade-coating to the best of our knowledge,even under unmodified humid air conditions(relative humidity of 65%–85%).The best operational stability of 3D pure FAPbI_(3) devices can also be achieved at the same time and unencapsulated HCuPc-FAPbI_(3) device can even operate with negligible degradation for 100 h in the open air(RH 30%–40%).Rong Li Jiale Ding Xijiao Mu Yifei Kang Anran Wang Weihui Bi Yunhe Zhang Jing Cao Qingfeng Dong 2022Journal of Energy Chemistry2022,31,8:0
20Structural plasticity-based hydrogel optical Willshaw model for one-shot on-the-fly edge learning显示文摘Autonomous one-shot on-the-fly learning copes with the high privacy,small dataset,and in-stream data at the edge.Implementing such learning on digital hardware suffers from the well-known von-Neumann and scaling bottlenecks.The optical neural networks featuring large parallelism,low latency,and high efficiency offer a promising solution.However,ex-situ training of conventional optical networks,where optical path configuration and deep learning model optimization are separated,incurs hardware,energy and time overheads,and defeats the advantages in edge learning.Here,we introduced a bio-inspired material-algorithm co-design to construct a hydrogel-based optical Willshaw model(HOWM),manifesting Hebbian-rule-based structural plasticity for simultaneous optical path configuration and deep learning model optimization thanks to the underlying opto-chemical reactions.We first employed the HOWM as an all optical in-sensor AI processor for one-shot pattern classification,association and denoising.We then leveraged HOWM to function as a ternary content addressable memory(TCAM)of an optical memory augmented neural network(MANN)for one-shot learning the Omniglot dataset.The HOWM empowered one-shot on-the-fly edge learning leads to 1000boost of energy efficiency and 10boost of speed,which paves the way for the next-generation autonomous,efficient,and affordable smart edge systems.Dingchen Wang Dingyao Liu Yinan Lin Anran Yuan Woyu Zhang Yaping Zhao Shaocong Wang Xi Chen Hegan Chen Yi Zhang Yang Jiang Shuhui Shi Kam Chi Loong Jia Chen Songrui Wei Qing Wang Hongyu Yu Renjing Xu Dashan Shang Han Zhang Shiming Zhang Zhongrui Wang 2023InfoMat2023,5,4:0
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