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The Unprecedented Extreme Anticyclonic Anomaly over Northeast Asia in July 2021.and Its Climatic Impacts

Advances in Atmospheric Sciences 2024年第4期41卷 608-618页

作者： Xingyan ZHOU Riyu lu Laboratory for Climate Studies National Climate CenterChina Meteorological AdministrationBeijing 100081China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

This study investigates the evolution of an extreme anomalous anticyclone(AA)event over Northeast Asia,which was one of the dominant circulation systems responsible for the catastrophic extreme precipitation event in July 2021.in Henan,and further explores the significant impact of this AA on surface temperatures beneath *** results indicate that this AA event over Northeast Asia was unprecedented in terms of intensity and *** AA was very persistent and extremely strong for 1. consecutive days from 1. to 22 July *** long-lived and unprecedented AA led to the persistence of warmer surface temperatures beyond the temporal span of the pronounced 500-hPa anticyclonic signature as the surface air temperatures over land in Northeast Asia remained extremely warm through 29 July ***,the sea surface temperatures in the Sea of Japan/East Sea were extremely high for 30 consecutive days from 1. July to 1. August 2021.persisting well after the weakening or departure of this *** results emphasize the extreme nature of this AA over Northeast Asia in July 2021.and its role in multiple extreme climate events,even over remote ***,possible reasons for this long-lasting AA are explored,and it is suggested to be a byproduct of a teleconnection pattern over extratropical Eurasia during the first half of its life cycle,and of the Pacific-Japan teleconnection pattern during the latter half.

关键词： anomalous anticyclone Northeast Asia surface air temperatures sea surface temperatures

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Large-scale chiral spherulites with controllable circularly polarized luminescence in liquid crystal block copolymers film

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Aggregate 2024年第1期5卷 427-435页

作者： Jianan Yuan Xuemin lu Qinghua lu School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghaiChina School of Chemical Science and Engineering Tongji UniversityShanghaiChina

Macroscopic chiral spherulites prepared by hierarchical self-assembly have attracted considerable attention due to their excellent property as chiroptical ***,preparing controllable chiral spherulites in bulk film remains a challenge due to the absent knowledge of the evolution mechanism from the molecule to macroscopic crystal during chiral *** this contribution,chiral macroscopic spherulites were constructed with controllable circularly polarized luminescence(CPL)using enantiomeric tartaric acid and rhodamine B co-assembled with liquid crystal block copolymers,poly(ethylene oxide)-b-poly(methyl methacrylate)bearing azobenzene group side *** was found that the chiral liquid crystal field induced by exogenous chiral molecules was closely related to the formation of macroscopic chiral ***,the transformation of azobenzene cis-trans isomerization under photo-thermal endows films with adjustable *** facile strategy provides a platform to design large-scale chiral structures for chiroptical switching,encryption,and memory storage materials.

关键词： block copolymer circularly polarized luminescence macroscopic chirality self-assembly

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Dynamic Shading and Glazing Technologies:Improve Energy,Visual,and Thermal Performance

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Energy and Built Environment 2024年第2期5卷 211-229页

作者： Weixuan lu School of Architecture University of Southern CaliforniaLos AngelesCAUnited States

Conventional static glazing sometimes has poor performance in energy,visual,and thermal *** this thesis,a series of simulations of an office building were done to compare the performance of conventional static glazing,exterior static and kinetic shades,dynamic glazing,and dynamic glazing working together with static or kinetic shades as a combinatorial *** thesis introduced a method for designers to make decisions among multiple shading and glazing options.A scoring system was developed to evaluate the overall ***,visual and thermal performance all had the same *** uses included annual Energy Use Intensity(EUI)and peak cooling loads of the hottest day of the *** performance included maximizing daylight and minimizing glare on the fall equinox *** performance included Predicted Mean Vote(PMV)Index which determined thermal comfort based on occupants’sensations and Predicted Percentage of Dissatisfied(PPD)which indicated the levels of thermal discomfort *** prediction was that the combination of dynamic glazing and kinetic shade would have better comprehensive performance and earn higher scores than other options.

关键词： Energy Daylight Thermal comfort Electrochromic glass Kinetic shades

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一种活性高、热稳定性好的甲醇合成催化剂

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天然气化工—C1.学与化工 2004年第2期29卷 16-19页

作者：王兆谦潘伟雄李晋鲁青海大学应用化学系西宁810016 清华大学化学系北京100084

甲醇合成催化剂中添加第4组分Zr,制得Cu Zn Al Zr催化剂,研究了制备方法对4组分甲醇合成催化剂性能的影响。用改进沉淀法所得催化剂活性最高,在230℃,3 0MPa,5500ml/(g cat·h)空速的温和条件下,甲醇时空产率达到0 978g/(g cat·h),活... 详细信息

甲醇合成催化剂中添加第4组分Zr,制得Cu Zn Al Zr催化剂,研究了制备方法对4组分甲醇合成催化剂性能的影响。用改进沉淀法所得催化剂活性最高,在230℃,3 0MPa,5500ml/(g cat·h)空速的温和条件下,甲醇时空产率达到0 978g/(g cat·h),活性和热稳定性均优于两种工业化催化剂C301.APCI。尤其是在200℃的较低温度下,活性是它们的两倍。XRD结果表明催化活性与前驱体结构密切相关。

关键词：甲醇合成铜基催化剂 XRD

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The joint knowledge reasoning model based on knowledge representation learning for aviation assembly domain

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Science China(Technological Sciences) 2024年第1期67卷 143-156页

作者： LIU PeiFeng QIAN lu lu Hu XUE Lei ZHAO XingWei TAO Bo State Key Laboratory of Digital Manufacturing Equipment and Technology Department of MechanicalHuazhong University of Science and TechnologyWuhan 430074China School of Transportation and Logistics Engineering Wuhan University of Technology(WHUT)Wuhan 430063China Shanghai Aircraft Manufacturing Co. Ltd.Shanghai 201324China

Knowledge graph technology is widely applied in the domain of general knowledge reasoning with an excellent *** fine-grained professional fields,professional knowledge graphs can provide more accurate information in practical industrial *** on an aviation assembly domain-specific knowledge graph,the article constructs a joint knowledge reasoning model,which combines a named entity recognition model and a subgraph embedding learning *** performing knowledge reasoning tasks,the two models vectorize entities,relationships and entity attributes in the same space,so as to share parameters and optimize learning *** knowledge reasoning model,which provides intelligent question answering services,is able to reduce the assembly error rate and improve the assembly *** system can accurately solve general knowledge reasoning problems in the assembly process in actual industrial scenarios of general assembly and component assembly under interference-free ***,this paper compares the proposed knowledge reasoning model based on knowledge representation learning and the question-answering system based on large-scale pre-trained *** the application scenario of system functional testing in general assembly,the joint model attains an accuracy rate of 95%,outperforming GPT with 78%accuracy and enhanced representation through knowledge integration with 71.accuracy.

关键词： intelligent manufacturing knowledge graph aviation assembly knowledge representation knowledge-based question an-swering

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Evaluation method for electromagnetic interference complexity of high voltage switch based on feature extraction and GCC-GRU network

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High Voltage 2024年第3期9卷 749-761页

作者： Wenchao lu Jiandong Duan Lin Cheng Jiangping lu Jiaxin Tao Jianning Yin School of Electrical Engineering Xi'an University of TechnologyXi'anChina Power Research Institute of State Grid Shaanxi Electric Power Co. LtdXi'anChina

When some new-type sensors are subjected electromagnetic interference(EMI),the traditional standard can no longer serve as the guidance for their EMI ***,it is necessary to evaluate the complexity of the new sensing equipment's suffering from electromagnetic interference.A hybrid method of feature extraction and complexity evaluation of Electromagnetic Interference signals based on generalised correntropy criterion(GCC)is ***,a variational mode decomposition al-gorithm for adaptive extraction of decomposed signals is constructed using GCC,and Generalised S-transform is used for processing and ***,according to the time-frequency space model,a new quantitative evaluation criterion interference factor is proposed,which overcomes the shortcomings of the traditional qualitative classification and the inability to solve the cross classification of ***,the Gated Recurrent Unit is introduced,and the GCC-GRU evaluation model with GCC as the loss function is *** authors conduct EMI tests and measured signal eval-uation with Medium Voltage and High Voltage switches,and the results show that the method proposed is correct and effective.

关键词： complexity criterion network

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A flexible multiscale algorithm based on an improved smoothed particle hydrodynamics method for complex viscoelastic flows

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Applied Mathematics and Mechanics(English Edition) 2024年第8期45卷 1387-1402页

作者： Jinlian REN Peirong lu Tao JIANG Jianfeng LIU Weigang lu College of Mathematical Science Yangzhou UniversityYangzhou 225002Jiangsu ProvinceChina College of Hydraulic Science and Engineering Yangzhou UniversityYangzhou 225002Jiangsu ProvinceChina

Viscoelastic flows play an important role in numerous engineering fields,and the multiscale algorithms for simulating viscoelastic flows have received significant attention in order to deepen our understanding of the nonlinear dynamic behaviors of viscoelastic ***,traditional grid-based multiscale methods are confined to simple viscoelastic flows with short relaxation time,and there is a lack of uniform multiscale scheme available for coupling different solvers in the simulations of viscoelastic *** this paper,a universal multiscale method coupling an improved smoothed particle hydrodynamics(SPH)and multiscale universal interface(MUI)library is presented for viscoelastic *** proposed multiscale method builds on an improved SPH method and leverages the MUI library to facilitate the exchange of information among different solvers in the overlapping *** test the capability and flexibility of the presented multiscale method to deal with complex viscoelastic flows by solving different multiscale problems of viscoelastic *** the first example,the simulation of a viscoelastic Poiseuille flow is carried out by two coupled improved SPH methods with different spatial *** effects of exchanging different physical quantities on the numerical results in both the upper and lower domains are also investigated as well as the absolute errors in the overlapping *** the second example,the complex Wannier flow with different Weissenberg numbers is further simulated by two improved SPH methods and coupling the improved SPH method and the dissipative particle dynamics(DPD)*** numerical results show that the physical quantities for viscoelastic flows obtained by the presented multiscale method are in consistence with those obtained by a single solver in the overlapping ***,transferring different physical quantities has an important effect on the numerical results.

关键词： multiscale method improved smoothed particle hydrodynamics(SPH) dissipative particle dynamics(DPD) multiscale universal interface(MUI) complex viscoelastic flow

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Physical mechanisms of plant roots affecting weathering and leaching of loess soil

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Science China Earth Sciences 2006年第9期49卷 1002-1008页

作者： LI Yong1.2, ZHANG Qingwen1.2, WAN Guojiang3, HUANG Ronggui3, PIAO Hechun3, BAI Lingyu2 & LI lu2 1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 71.1.0, China 2. Institute of Agro-Environment and Sustainable Development, Chinese Academy of Agricultural Sciences, Beijing 1.0081. China 3. Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water Conservation Chinese Academy of Sciences Yangling China Institute of Agro-Environment and Sustainable Development Chinese Academy of Agricultural Sciences Beijing China Institute of Geochemistry Chinese Academy of Sciences Guiyang China

Plant roots have potential impacts on soil mineral weathering and *** objective is to understand the physical mechanisms of plant roots affecting weathering andleaching of loess soil. Root densities were measured through the method of a large-size dug profile,and transport fluxes of soil elements were determined using an undisturbed monolith soilinfiltration device on the hilly and gully regions of the Chinese Loess Plateau. The results showthat the improvement effects of soil environment by plant roots are mainly controlled by the densityand weight of the fibrous roots with the diameters less than 1.mm. Plant roots have the strongereffects on soil physical properties than chemical properties. The principal components analysis(PCA) indicates that soil physical properties by plant roots account for 56.7% of variations in soilenvironment whereas soil chemical properties and pH contribute about 24.2% of the soil *** roles of plant roots in controlling soil weathering and leaching increased in the followingorder: infiltration enhancement > increase of bio-active substance > stabilization of soilstructure. The effects of plant roots on soil mineral weathering and leaching can be quantifiedusing the multiple regression models with the high prediction accuracies developed in this study.

关键词： plant roots, soil weathering and leaching rates, soil environment field, principal components analysis (PCA), Chinese Loess Plateau.

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Ion and electron motions in the outer electron diffusion region of collisionless magnetic reconnection

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Earth and Planetary Physics 2024年第3期8卷 472-478页

作者： Cong Chang QuanMing lu San lu Kai Huang RongSheng Wang Deep Space Exploration Laboratory School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China Chinese Academy of Sciences(CAS)Center for Excellence in Comparative Planetology CAS Key Laboratory of Geospace EnvironmentHefei 230026China Collaborative Innovation Center of Astronautical Science and Technology Harbin 150001China

Two-dimensional particle-in-cell simulations are performed to study the coupling between ion and electron motions in collisionless magnetic *** electron diffusion region(EDR),where the electron motions are demagnetized,is found to have a two-layer structure:an inner EDR near the reconnection site and an outer EDR that is elongated to nearly 1. ion inertial lengths in the outflow *** the inner EDR,the speed of the electron outflow increases when the electrons move away from the X *** the outer EDR,the speed of the electron outflow first increases and then decreases until the electrons reach the boundary of the outer *** the boundary of the outer EDR,the magnetic field piles up and forms a depolarization *** the perspective of the fluid,a force analysis on the formation of electron and ion outflows has also been *** the X line,the electrons are accelerated by the reconnection electric field in the out-of-plane *** the electrons move away from the X line,we find that the Lorentz force converts the direction of the accelerated electrons to the x direction,forming an electron *** electric field forces and electron gradient forces tend to drag the electron *** acceleration along the x direction is caused by the Lorentz force,whereas the pressure gradient force tends to decelerate the ion *** these two terms are important,their effects on ions are almost *** Hall electric field force does positive work on ions and is not *** ions are continuously accelerated,and the ion and electron outflow velocities are almost the same near the depolarization front.

关键词： collisionless magnetic reconnection electron diffusion region force analysis particle-in-cell simulation

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A new review of single-ion conducting polymer electrolytes in the light of ion transport mechanisms

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Journal of Energy Chemistry 2024年第2期89卷 543-556,I0012页

作者： Yuqi luo lu Gao Weimin Kang State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes School of Textile Science and EngineeringTiangong UniversityTianjin 300387China

With the depletion of fossil fuels and the demand for high-performance energy storage devices,solidstate lithium metal batteries have received widespread attention due to their high energy density and safety *** them,the earliest developed organic solid-state polymer electrolyte has a promising future due to its advantages such as good mechanical flexibility,but its poor ion transport performance dramatically limits its performance ***,single-ion conducting polymer electrolytes(SICPEs)with high lithium-ion transport number,capable of improving the concentration polarization and inhibiting the growth of lithium dendrites,have been proposed,which provide a new direction for the further development of high-performance organic polymer *** view of this,lithium ions transport mechanisms and design principles in SICPEs are summarized and discussed in this *** modification principles currently used can be categorized into the following three types:enhancement of lithium salt anion-polymer interactions,weakening of lithium salt anion-cation interactions,and modulation of lithium ion-polymer *** addition,the advances in single-ion conductors of conventional and novel polymer electrolytes are summarized,and several typical highperformance single-ion conductors are enumerated and analyzed in what way they improve ionic conductivity,lithium ions mobility,and the ability to inhibit lithium ***,the advantages and design methodology of SICPEs are summarized again and the future directions are outlined.

关键词： Lithium metal batteries Single-ion conductor Polymer electrolytes Ion transport mechanism Li-ion transport number

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