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Structurally Flexible 2D Spacer for Suppressing the Electron-Phonon Coupl.ng Induced non-Radiative Decay in Perovskite Solar Cells

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nano-Micro letters 2024年第9期16卷 325-340页

作者： Ruikun Cao Kexuan Sun chang liu Yuhong Mao Wei Guo Ping Ouyang Yuanyuan Meng Ruijia Tian lisha Xie Xujie lü Ziyi Ge Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211People’s Republic of China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Center for High Pressure Science and Technology Advanced Research(HPSTAR) Shanghai 201203People’s Republic of China

This study presents experimental evidence of the dependence of non-radiative recombination processes on the electron-phonon coupl.ng of perovskite in perovskite solar cells(PSCs).Via A-site cation engineering,a weaker electron-phonon coupl.ng in perovskite has been achieved by introducing the structurally soft cyclohexane methylamine(CMA^(+))cation,which could serve as a damper to alleviate the mechanical stress caused by lattice oscillations,compared to the rigid phenethyl methylamine(PEA^(+))*** demonstrates a significantly lower non-radiative recombination rate,even though the two types of bulky cations have similar chemical passivation effects on perovskite,which might be explained by the suppressed carrier capture process and improved lattice geometry *** resulting PSCs achieve an exceptional power conversion efficiency(PCE)of 25.5%with a record-high opencircuit voltage(V_(OC))of 1.20 V for narrow bandgap perovskite(FAPbI_(3)).The established correlations between electron-phonon coupl.ng and non-radiative decay provide design and screening criteria for more effective passivators for highly efficient PSCs approaching the Shockley-Queisser limit.

关键词： Electron-phonon coupl.ng A-site cation engineering non-radiative recombination

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An Experimental Study on Response and Control of a Flapping-Wing Aerial Robot Under Wind Gusts

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Journal of Bionic Engineering 2024年第1期21卷 209-223页

作者： Kazuki Shimura Hikaru Aono chang-kwon Kang Graduate School of Science and Technology Shinshu University3-15-1 TokidaUedaNagano 3868567Japan Department of Mechanical Engineering and Robotics 3-15-1 TokidaUedaNagano 3868567Japan Department of Mechanical and Aerospace Engineering University of Alabama in HuntsvilleTechnology Hall N266HuntsvilleAL35899USA

Bioinspired flapping-wing micro-air-vehicles(FWMAVs)have the potential to be useful aerial tools for gathering information in various *** recent advancements in manufacturing technologies and better understanding of aerodynamic mechanisms behind of the flapping flight,outdoor flights have become a ***,to fully realize the potential of FWMAVs,further improvements are necessary,particularly in terms of stability and robustness under gusty *** this study,the response and control of a tailless two-winged FWMAV under the wind gusts are *** experiments are conducted with a one-degree-of-freedom gimbal to focus on effects of wind gusts on the rotational motion of the ***-derivative and sliding-mode controls are adopted for the attitude *** present that the body angles changed in time and reached approximately 50°at the maximum due to the wing *** sliding-mode controller can more effectively control the rotational angle in the presence of disturbances and both the wing speed and changes in wind speed have an impact on the effectiveness of attitude *** results contribute to the development of of tailless two-winged,single-motor driven FWMAVs in terms of the design of attitude controller and testing apparatus.

关键词： Flapping-wing micro-air vehicles Sliding-mode control Pitch and roll angle-Wind gus

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A Generalized MSST Algorithm for Counting Points of Elliptic Curves over F_(p)^(n)

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Journal of Systems Science & Complexity 2024年第4期37卷 1738-1754页

作者： lI Xiao lV chang PAn Zhizhong Key laboratory of Cyberspace Security Defense Institute of Information EngineeringChinese Academy of SciencesBeijing 100085China School of Cyber Security University of Chinese Academy of SciencesBeijing 100085China Huawei Technologies Co. Ltd.Shenzhen 518129China

Elliptic curve cryptography is an important part of nowaday's public key *** points of elliptic curves over finite fields is of great significance to the selection of safety *** present,there are many p-adic algorithms,such as SST algorithm,generalized AGM algorithm,Kedlaya algorithm,etc.,which can deal with the situation of finite fields of small *** this paper,the authors generalize the MSST algorithm of characteristic 2 to general fields of odd characteristic,and propose the generalized MSST *** generalized MSST algorithm is achieved by combining the advantages of the SST algorithm and the generalized AGM *** the time complexity of the multiplication of two n-bit numbers is denoted as O((n)^(μ)),then the time complexity of the generalized MSST algorithm is O(n^(2μ+1/1+μ)),which is the same as the improved SST *** practical experiments,the running time of the generalized MSST algorithm is less than that of the improved SST algorithm.

关键词： Elliptic curve generalized AGM algorithm generalized MSST algorithm SST algorithm

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An Onl.ne Q-learning Method for l.near-Quadratic nonzero-Sum Stochastic Differential Games with Completely Unknown Dynamics

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Journal of Systems Science & Complexity 2024年第5期37卷 1907-1922页

作者： ZHAnG Bao-Qiang WAnG Bing-chang CAO Ying School of Control Science and Engineering Shandong University

In this paper, the authors design a reinforcement learning algorithm to solve the adaptive l.near-quadratic stochastic n-players non-zero sum differential game with completely unknown dynamics. For each player, a critic network is used to estimate the Q-function, and an actor network is used to estimate the control input. A model-free onl.ne Q-learning algorithm is obtained for solving this kind of problems. It is proved that under some mild conditions the system state and weight estimation errors can be uniformly ultimately bounded. A simulation with five players is given to verify the effectiveness of the algorithm.

关键词： Actor-critic algorithm model-free adaptive control nonzero-sum stochastic game reinforcement learning

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Dynamic kinetic stereodivergent transformations of propargylic ammonium salts via dual.nickel and copper catalysis

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Chinese Chemical letters 2024年第8期35卷 265-269页

作者： Ruil.ng Geng l.ngzi Peng chang Guo Hefei national laboratory for Physical Sciences at the Microscale and Department of Chemistry University of Science and Technology of ChinaHefei 230026China

The dynamic kinetic asymmetric transformation of racemic propargylic ammonium salts with prochiral aldimine esters through a stereodivergent propargylation is catalyzed by dual.nickel and copper ***,a diverse range of optically activeα-quaternary amino esters were produced via C-n bond cleavage with high reaction efficiency and stereoselectivity(up to>99%ee).By selection of the appropriate pair-wise combination of catalyst configurational isomers,all four possible stereoisomers of the corresponding propargylation products are obtained in high yields with excell.nt regio-,diastereo-,and enantioselectiv-ities.

关键词： Stereodivergent propargylation Dual catalysis C-n bond cleavage Azaomethine ylides Internal propargylic ammonium salts Excell.nt stereoselectivity

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Phanerozoic co-evolution of O2-CO2 and ocean habitability

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national Science Review 2024年第6期11卷 18-21页

作者： Zunli lu Rosal.nd E.M.Rickaby Jonathan l.Payne Ashley n.Prow Department of Earth & Environmental Sciences Syracuse University Department of Earth Sciences University of Oxford Department of Earth and Pl.netary Sciences Stanford University

Atmospheric carbon dioxide and oxygen concentrations are partially l.nked via the geological cycle of organic carbon （Fig. 1A–C; e.g. CO2+H2O■CH2O+O2）. The history of these two biologically active components, controls on their concentrations, and implications for the complexity of the biosphere and habitability of Earth have been hotly debated, but are generally considered independently.

关键词： CO2-COnCEnTRATInG MECHAnISM OXYGEn EVOlUTIOn AnOXIA

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Strategies to achieve effective nitrogen activation

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Carbon Energy 2024年第5期6卷 137-163页

作者： Bin chang Huabin Zhang Shuhui Sun Gaixia Zhang KAUST Catalysis Center(KCC) King Abdullah University of Science and Technology(KAUST)ThuwalKingdom of Saudi Arabia Institut national de la Recherche Scientifique(InRS) CentreÉnergie Matériaux TélécommunicationsVarennesQuébecCanada Department of Electrical Engineering École de Technologie Supérieure(ÉTS)MontréalQuébecCanada

Ammonia serves as a crucial chemical raw material and hydrogen energy *** electrocatalytic nitrogen reduction reaction(nRR),powered by renewable energy,has attracted tremendous interest during the past few *** some achievements have been revealed in aqueous nRR,significant chall.nges have also been *** activity and selectivity are fundamentally limited by nitrogen activation and competitive hydrogen *** review focuses on the hurdles of nitrogen activation and delves into complementary strategies,including materials design and system optimization(reactor,electrolyte,and mediator).Then,it introduces advanced interdiscipl.nary technologies that have recently emerged for nitrogen activation using high-energy physics such as plasma and *** a better understanding of the corresponding reaction mechanisms in the coming years,these technologies have the potential to be extended in further *** review provides further insight into the reaction mechanisms of selectivity and stability of different reaction *** then recommend a rigorous and detailed protocol for investigating nRR performance and also highlight several potential research directions in this exciting field,coupl.ng with advanced interdiscipl.nary applications,in situ/operando characterizations,and theoretical calculations.

关键词： activation via mediators catalyst optimization electrochemical.nitrogen fixation high-energy activation of nitrogen nitrogen

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Empirical model for fusion cross sections of Ca-induced reactions

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Chinese Physics C 2024年第3期48卷 126-132页

作者： Reddi Rani.l.n.Sowmya K.n Sridhar H C.Manjunatha M.M.Armstrong Arasu Department of Physics St.Joseph's College(Autonomous)Affiliated to Bharathidasan UniversityTiruchirappalli620002TNIndia Department of Physics Govt.First.Grade CollegeChikkaballapur-562101KarnatakaIndia Department of Physics Govt.First.Grade CollegeMalur-563160KarnatakaIndia Department of Physics Govt.First.Grade CollegeDevanahalli-562110KarnatakaIndia

A new empirical formula for the astrophysical S-factor has been suggested as a function of the Coulomb interaction parameter,center of mass energy,and barrier *** 22 fusion reactions with ^(40,48)Ca as projectiles were considered for different targets,leading to compound nuclei with atomic and mass numbers varying between 40≤Z≤≤Z≤112 and 88≤A≤27888≤A≤278,*** fusion cross-sections have been estimated using the geometric factor,the Gamow-Sommerfield factor,and the empirical formula for the *** study's findings showed better agreement with those of available experiments when compared to Wong's *** present work leads to a smaller standard deviation value than Wong's formula when used to correlate the experimental data of calcium-induced fusion ***'s formula provides a good approximation of fusion cross-sections when the center of mass energy is below the fusion barrier when compared to above the fusion barrier.

关键词： fusion cross-sections Wong formula Gamow-Sommerfield-factor Geometric-factor S-factor

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Chi-square automatic interaction detection(CHAID)analysis of the use of safety goggles and face masks as personal protective equipment(PPE)to protect against occupational biohazards

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Journal of Biosafety and Biosecurity 2024年第2期6卷 125-133页

作者： Raúl Aguilar-El.na Juán JoséAgún-González Universidad Internacional de Val.ncia ValenciaSpain

Background:This study represents the first Spanish investigation to rigorously evaluate compliance with the use of safety goggles and face masks as essential personal protective equipment(PPE)in companies with workplaces involving exposure to biological ***:This study aimed to examine the degree of use of face masks and safety goggles as personal protective equipment(PPE),the factors that influence their use,and the profile of workers exposed to occupational biological agents in Spanish companies in the health sector,farming sector,meat industry,waste treatment pl.nts,food industry,and veterinary ***:We conducted a cross-sectional descriptive study involving 590 Spanish workers from 51 *** developed a 34-item questionnaire to assess workers’perception of risk related to exposure to biological agents in their *** the questions,three were designed to measure the degree of use of key protective equipment in sectors with biological agent exposure:protective gloves,safety goggles or face *** only analyzed safety goggles and face *** performed various statistical analyses,including Cronbach’s alpha,frequency of endorsement,content validity ratio using lawshe’s method,varimax rotation,the Kaiser-Meyer-Olkin test,and Bartlett’s sphericity test,to assess the internal consistency and reliability of the ***,we employed a chi-square automatic interaction detection(CHAID)segmentation analysis,using workers’responses regarding their attitudes toward safety goggles and face mask usage as PPE for protection against biological risks,with demographic variables as independent ***:In the current study,CHAID analysis revealed that workers exposed to group 2 biological agents used more safety goggles and face shields compared with workers exposed to other groups of biological ***,workers in laboratories and the food industry used face masks more than workers of other ***

关键词： PPE Safety googles and breath mask CHAID Biological Agents Occupational Biosafety

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SMXl5 attenuates strigolactone signal.ng in Arabidopsis thaliana by inhibiting SMXl7 degradation

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Molecular Pl.nt 2024年第4期17卷 631-647页

作者： Qingtian li Haiyang Yu Wenwen chang Sunhyun chang Michael Guzman lionel Faure Eva-Sophie Wal.ner Heqin Yan Thomas Greb lei Wang Ruifeng Yao David C.nelson Department of Botany and Pl.nt Sciences University of CaliforniaRiversideRiversideCA 2521USA Yazhouwan national laboratory Sanya 572025China Hainan Seed Industry laboratory Sanya 57205China State Key laboratory of Chemo/Biosensing and Chemometrics Hunan Provincial Key Laboratory of Plant Functional Genomics and Developmental RegulationCollege of BiologyHunan UniversityChangsha 410082China Key laboratory of Seed Innovation Center for Agricultural Resources ResearchInstitute of Genetics and Developmental BiologyChinese Academy of SciencesShijiazhuangHebei 050021China University of Chinese Academy of Sciences Beijing 10004China School of the Sciences Biology DivisionTexas Woman’s UniversityDentonTX 76204USA Centre for Organismal Studies(COS) Heidelberg University6120 HeidelbergGermany

Hormone-activated proteolysis is a recurring theme of pl.nt hormone signal.ng *** strigolactone signal.ng,the enzyme receptor DWARF14(D14)and an F-box protein,MORE AXIllARY GROWTH2(MAX2),mark SUPPRESSOR OF MAX21-lIKE(SMXl)family proteins SMXl6,SMXl7,and SMXl8 for rapid *** of these transcriptional corepressors initiates downstream growth *** homologous proteins SMXl3,SMXl4,and SMXl5,however,are resistant to MAX2-mediated *** discovered that the smxl4 smxl5 mutant has enhanced responses to ***5 attenuates strigolactone signal.ng by interfering with AtD14-SMXl7 ***5 interacts with AtD14 and SMXl7,providing two possible ways to inhibit SMXl7 ***5 function is partially dependent on an ethyl.ne-responsive-element binding-factor-associated amphiphilic repression(EAR)motif,which typically mediates interactions with the TOPlESS family of transcriptional ***,we found that loss of the EAR motif reduces SMXl5-SMXl7 interactions and the attenuation of strigolactone signal.ng by *** hypothesize that integration of SMXl5 into heteromeric SMXl complexes reduces the susceptibility of SMXl6/7/8 proteins to strigolactone-activated degradation and that the EAR motif promotes the formation or stability of these *** mechanism may provide a way to spatially or temporally fine-tune strigolactone signal.ng through the regulation of SMXl5 expression or translation.

关键词： Arabidopsis typically inhibiting

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