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The molecular basis of heat stress responses in plants

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Molecular Plant 2023年第10期16卷 1612-1634页

作者： yi Kan Xiao-Rui Mu Jin Gao Hong-xuan Lin Youshun Lin National Key Laboratory of Plant Molecular Genetics CAS Centre for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China Joint Center for Single Cell Biology School of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China University of the Chinese Academy of Sciences Beijing 100049China Guangdong Laboratory for Lingnan Modern Agriculture Guangzhou 510642China

Global warming impacts crop production and threatens food *** temperatures are sensed by different cell *** increases are classified as either mild warm temperatures or excessively hot temperatures,which are perceived by distinct signaling pathways in *** temperatures induce thermomorphogenesis,while high-temperature stress triggers heat acclimation and has destructive effects on plant growth and *** this review,we systematically summarize the heat-responsive genetic networks in Arabidopsis and crop plants based on recent *** addition,we highlight the strategies used to improve grain yield under heat stress from a source-sink *** also discuss the remaining issues regarding the characteristics of thermosensors and the urgency required to explore the basis of acclimation under multifactorial stress combination.

关键词： global warming thermosensing heat stress thermomorphogenesis heat stress responses heat acclimation

Performance of the CENDL-3.2 and other major neutron data libraries for criticality calculations

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Nuclear Science and Techniques 2022年第1期33卷 81-97页

作者： Bin Zhang Xu-Bo Ma Kui Hu Teng Zhang xuan Ma yi-Xue Chen School of Nuclear Science and Engineering North China Electric Power UniversityBeijing 102206China

Nuclear data are the cornerstones of reactor physics and shielding ***,China released CENDL-3.2 in 2020,and the US released ENDF/B-VIII.0 in ***,it is necessary to comprehensively evaluate the criticality computing performance of these newly released evaluated nuclear *** this study,we used the NJOY2016 code to generate ACE format libraries based on the latest neutron data libraries(including CENDL-3.2,JEFF3.3,ENDF/B-VIII.0,and JENDL4.0).The MCNP code was used to conduct a detailed analysis of fission nuclides,including^(235)U,^(233)U,and^(239)Pu,in different evaluated nuclear data libraries based on 100 *** criticality calculation performance of each library was evaluated using three statistical parameters:δk/σ,χ^(2),and.Analysis of theδk/σparameter showed that CENDL-3.1 and JENDL-4.0 both had>10 benchmarks that exceeded 3r,whereas CENDL3.2,ENDFB-VIII.0,and JEFF-3.3 had,7,5,and 4 benchmarks,respectively,exceeding *** ENDF/B-VII.1 library performed best,with only two benchmarks exceeding *** to CENDL-3.1,CENDL-3.2 offers an improvement in criticality *** to the JEFF-3.3 and ENDF/B-VIII.0 libraries,CENDL3.2 performs better in the calculation of the^(233)U assemblies,but it performs poorly in the pusl11 series case calculation of the^(239)Pu assemblies,and thus further improvement is needed.

关键词： Criticality calculations CENDL-3.2 ENDF/B-VIII.0 Neutron ACE library

Reconstitution of Motor Proteins through Molecular Assembly

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Chinese Journal of Chemistry 2020年第2期38卷 123-129页

作者： yi Jia Mingjun xuan Xiyun Feng Li Duan Jieling Li Junbai Li Beijing National Laboratory for Molecular Sciences CAS Key Lab of ColloidInterface and Chemical ThermodynamicsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Yunnan Normal University KunmingYunnan 650500China Northwest Institute of Nuclear Technology Xi'anShaanxi 710024China University of Chinese Academy of Sciences Beijing 100049China

What is the most favorite and original chemistry developed in your research group?The most favorite and original chemistry developed in my research group is about the reconstitution of motor proteins in artificially designed and assembled *** is based on the molecular assembly technique,but the method is different from the conventional approach.

关键词： chemistry Molecular favorite

Determination of the effective utilization coefficient of irrigation water based on geographically weighted regression

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Frontiers of Earth Science 2022年第2期16卷 401-410页

作者： Rui SHI Gaoxu WANG xuan ZHANG yi XU Yongxiang WU Wei WU College of Hydrology and Water Resource Hohai UniversityNanjing 210098China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing 210029China Hydrology and Water Resources Department Nanjing Hydraulic Research InstituteNanjing 210029China

This study uses geographically weighted regression to determine the spatial distribution of the effective utilization coefficient of irrigation water in Zhejiang Province,China,owing to the influences of spatial attributes on the irrigation *** sample set of this study comprised 165 agricultural test sites.A multivariate linear regression model and a geographically weighted regression model were established using the effective utilization coefficient of agricultural irrigation water as the dependent variable in addition to a suite of independent variables,including the actual irrigation area,the percentage of farmland using water-saving irrigation,the type of irrigation area,the net water consumption per mu,the water intake method,the terrain slope,and the soil field *** revealed a positive spatial correlation and noticeable agglomeration features in the effective utilization coefficient of irrigation water in Zhejiang *** geographically weighted regression model performed better in terms of fit and prediction accuracy than the multivariate linear regression *** obtained findings confirm the suitability of the geographically weighted regression model for determining the spatial distribution of the effective utilization coefficient of irrigation water in Zhejiang,and offer a new approach on a regional scale.

关键词： effective utilization coefficient of irrigation water spatial autocorrelation multivariate linear regression geographically weighted regression

Construction of three stereocenters via hydrogenative desymmetrization of 2,2,5-trisubstituted cyclohexane-1,3-diones

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Science China Chemistry 2021年第2期64卷 232-237页

作者： yi-xuan Ding Zhou-Hao Zhu Han Wang Chang-Bin Yu Yong-Gui Zhou State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

A Ru-catalyzed hydrogenative desymmetrization of 2,2,5-trisubstituted cyclohexane-1,3-diones was developed for construction of three stereocenters including two coherent and discontiguous chiral centers and a chiral quaternary carbon with excellent enantio-and *** synthesis of four stereoisomers could be conducted with high *** desymmetrization could be achieved at gram scale without loss of reactivity and optical purity,and a formal synthesis of bioactive molecule(-)-isocelorbicol was completed.

关键词： desymmetrization hydrogenation 1,3-cyclohexanediones three stereocenters chiral quaternary carbon

Learning Unitary Transformation by Quantum Machine Learning Model

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Computers, Materials & Continua 2021年第7期68卷 789-803页

作者： yi-Ming Huang Xiao-Yu Li yi-xuan Zhu Hang Lei Qing-Sheng Zhu Shan Yang School of Information and Software Engineering University of Electronic Science and Technology of ChinaChengdu610054China School of Physics University of Electronic Science and Technology of ChinaChengdu610054China Department of Chemistry Physics and Atmospheric SciencesJackson State UniversityJacksonMS39217USA

Quantum machine learning(QML)is a rapidly rising research eld that incorporates ideas from quantum computing and machine learning to develop emerging tools for scientic research and improving data *** to efciently control or manipulate the quantum system is a fundamental and vexing problem in quantum *** can be described as learning or approximating a unitary *** the success of the hybrid-based quantum machine learning model proposed in recent years,we investigate to apply the techniques from QML to tackle this *** on the Choi–Jamiołkowski isomorphism in quantum computing,we transfer the original problem of learning a unitary operator to a min–max optimization problem which can also be viewed as a quantum generative adversarial ***,we select the spectral norm between the target and generated unitary operators as the regularization term in the loss *** by the hybrid quantum-classical framework widely used in quantum machine learning,we employ the variational quantum circuit and gradient descent based optimizers to solve the min-max optimization *** our numerical experiments,the results imply that our proposed method can successfully approximate the desired unitary operator and dramatically reduce the number of quantum gates of the traditional *** average delity between the states that are produced by applying target and generated unitary on random input states is around 0.997.

关键词： Machine learning quantum computing unitary transformat

SETI strategy with FAST fractality

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Research in Astronomy and Astrophysics 2021年第7期21卷 234-240页

作者： yi-xuan Chen Wen-Fei Liu Zhi-Song Zhang Tong-Jie Zhang Department of Astronomy Beijing Normal UniversityBeijing 100875China College of Physics and Electronic Engineering Qilu Normal UniversityJinan 250200China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China

We applied the Koch snowflake fractal antenna in planning calibration of the Five-hundred-meter Aperture Spherical radio Telescope(FAST), hypothesizing second-order fractal primary reflectors can optimize the orientated sensitivity of the telescope. Meanwhile, on the grounds of NASA Science Working Group Report in 1984, we reexamine the strategy of Search for Extraterrestrial Intelligence(SETI).A mathematical analysis of the radar equation will be performed in the first section, aiming to make it convenient to design a receiver system that can detect activities of an extraterrestrial civilization, according to the observable region of the narrowband. Taking advantage of the inherent potential of FAST, we simulate the theoretical detection of a Kardashev Type I civilization by a snowflake-selected reflecting area(Drake et al.).

关键词： SETI FAST fractal antennae

Improvement of coercivity and thermal stability of Nd-Fe-B sintered magnets by intergranular addition of Tb80Fe20 alloy

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Journal of Rare Earths 2022年第12期40卷 1899-1904,I0003页

作者： Ze Duan Haicheng xuan Jincai Su Jingwu Chen Xiaofei yi Youhao Liu Peide Han College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China State Key Laboratory of Rare Earth Permanent Magnet Materials Hefei 231500China

To improve the coercivity and temperature stability of Nd-Fe-B sintered magnets for high-temperature applications,the eutectic Tb_(80)Fe_(20)(wt%)alloy powders were added into the Nd-Fe-B sintered magnets by intergranular method to enhance the coercivity(H_(cj))and thermal *** micro structure,magnetic properties and thermal stability of the Nd-Fe-B magnets with different Tb_(80)Fe_(20)contents were *** experimental results demonstrate that the coercivity(H_(cj))of the sintered Nd-Fe-B magnet is significantly enhanced from 14.12 to 27.78 kOe,and the remanence(Br)decreases not obviously by introducing 4 wt%Tb_(80)Fe_(20)***,the reversible tempe rature coefficients of coercivity(β)and remanence(α)of the Nd-Fe-B magnets are increased from-0.5634%/℃to-0.4506%/℃and-0.1276%/℃to-0.1199%/℃at 20-170℃,*** Curie temperature(TC)of the Nd-Fe-B magnet is slightly enhanced with the increase of Tb_(80)Fe_(20)***,the irreversible flux magnetic loss(hirr)is obviously reduced as Tb80Fe20addition *** analysis of the microstructure reveals that a modified microstructure,*** and continuous RE-rich grain boundary layer,is acquired in the sintered magnets by introducing Tb_(80)Fe_(20)*** associated mechanisms on improved coercivity and thermal stability were comprehensively researched.

关键词： Tb80Fe20 alloy Coercivity Nd-Fe-B sintered magnet Thermal stability Rare earths

Charge storage mechanism of MOF-derived Mn2O3 as high performance cathode of aqueous zinc-ion batteries

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Journal of Energy Chemistry 2021年第1期30卷 277-283,I0009页

作者： Min mao Xingxing Wu yi Hu Qunhui Yuan Yan-Bing He Feiyu Kang Tsinghua Shenzhen International Graduate School Division of Energy&EnvironmentTsinghua UniversityShenzhen 518055GuangdongChina Laboratory of Advanced Materials Department of Materials Science and EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Advanced Welding and Joining and School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055GuangdongChina

Aqueous Zinc-ion batteries(ZIB) are attracting immense attention because of their merits of excellent safety and quite cheap properties compared with lithium-ion batteries(LIB).Manganese oxide is one of the most important cathode materials of *** this paper,α-Mn2O3 used as cathode of ZIB is synthesized via Metal-Organic Framework(MOF)-derived method,which delivers a high specific capacity of225 mAh g^(-1) at 0.05 A g^(-1) and 92.7 mAh g^(-1) after 1700 cycles at 2 A g^(-1).The charge storage mechanism of α-Mn2O3 cathode is found to greatly depend on the discharge current *** lower current density discharging,the H+ and Zn2+ are successively intercalated into the α-Mn2O3 before and after the "turning point" of discharge voltage and their discharging products present obviously different morphologies changing from flower-like to large plate-like *** a higher current density,the low-voltage plateau after the turning point disappears due to the decrease of amount of Zn2+ intercalation and the H+intercalation is dominated in α-Mn2 *** study provides significant understanding for future design and research of high-performance Mn-based cathodes of ZIB.

关键词： Zinc ion batteries α-Mn2O3 Metal-organic framework(MOF) Charge storage mechanism