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The Impact of Moist Physics on the Sensitive Area Identification for Heavy Rainfall Associated Weather Systems

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Advances in Atmospheric Sciences 2022年第5期39卷 684-696页

作者： Huizhen YU zhiyong MENG Qingdao Meteorological Bureau Qingdao 266003China Department of Atmospheric and Oceanic Sciences School of PhysicsPeking UniversityBeijing 100871China

The impact of moist physics on the sensitive areas identified by conditional nonlinear optimal perturbation(CNOP)is examined based on four typical heavy rainfall cases in northern China through performing numerical experiments with and without moist *** show that the CNOP with moist physics identifies sensitive areas corresponding to both the lower-(850−700 hPa)and upper-level(300−100 hPa)weather systems,while the CNOP without moist physics fails to capture the sensitive areas at lower *** reasons for the CNOP peaking at different levels can be explained in both algorithm and physics ***,the gradient of the cost function with respect to initial perturbations peaks at the upper level without moist physics which results in the upper-level peak of the CNOP,while it peaks at both the upper and lower levels with moist physics which results in both the upper-and lower-level peaks of the ***,the upper-level sensitive area is associated with high baroclinicity,and these dynamic features can be captured by both CNOPs with and without moist *** lower-level sensitive area is associated with moist processes,and this thermodynamic feature can be captured only by the CNOP with moist *** result demonstrates the important contribution of the initial error of lower-level systems that are related to water vapor transportation to the forecast error of heavy rainfall associated weather systems,which could be an important reference for heavy rainfall observation targeting.

关键词： moist physics heavy rainfall sensitive area CNOP

Interwoven grain boundary makes homoporous and crystalline polymer membrane with high mechanical stability

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Science China Chemistry 2024年第11期67卷 3503-3504页

作者： Lianshan Li zhiyong Tang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Centre for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Membrane separation is widely used in industry to recover and capture gases or to purify liquids. Compared with conventional separation methods, such as cryogenic and adsorptive or absorptive separation, membrane separation is an energy-efficient and environment-friendly technique that occupies less space and can be operated in a continuous mode [1].

关键词： separation crystalline stability

Supported Recyclable Metal-free Frustrated Lewis Pair Catalyst for Catalytic Hydrogenation of Substituted Pyridines to Piperidines

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Chemical Research in Chinese Universities 2024年第4期40卷 682-689页

作者： MA Shaohua TANG zhiyong CAS Key Laboratory for Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China

The construction of heterogeneous frustrated Lewis pairs(FLPs)catalysts is crucial for realizing highly efficient and recyclable pyridines catalytic *** this work,we prepared a recyclable heterogenous FLPs catalyst CMP-BF with conjugated microporous polymer CMP-ethynyl as the support via self-catalyzed 1,1-carboboration reaction with commercial Lewis acid B(C_(6)F_(5))_(3).The as-synthesized CMP-BF demonstrates superior heterogenous catalytic hydrogenation performance(conversion>99%),and considerable stability(84%conversion after three cycles)in recyclable hydrogenation of 2,*** work provides insights into the fabrication and catalytic application of recyclable heterogenous FLP catalysts.

关键词： Pyridine hydrogenation Frustrated Lewis pair Conjugated microporous polymer

Spatial variability of leaf wetness under different soil water conditions in rainfed jujube (Ziziphus jujuba Mill.) in the loess hilly region, China

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Journal of Arid Land 2022年第1期14卷 70-81页

作者： GAO zhiyong WANG Xing State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China Xi'an University of TechnologyXi'an 710048China School of Agriculture Ningxia UniversityYinchuan 750021China

Leaf wetness provides a wide range of benefits not only to leaves,but also to ecosystems and *** regulates canopy eco-hydrological processes and drives spatial differences in hydrological *** spite of these functions,little remains known about the spatial distribution of leaf wetness under different soil water *** wetness measurements at the top(180 cm),middle(135 cm),and bottom(85 cm)of the canopy positions of rainfed jujube(Ziziphus jujuba Mill.)in the Chinese loess hilly region were obtained along with meteorological and soil water conditions during the growing seasons in 2019 and *** soil water non-deficit condition,the frequency of occurrence of leaf wetness was 5.45%higher at the top than at the middle and bottom of the canopy *** frequency of occurrence of leaf wetness at the top,middle and bottom of the canopy positions was over 80%at 17:00‒18:00(LST).However,the occurrence of leaf wetness at the top was earlier than those at the middle and bottom of the canopy ***,leaf drying at the top was also latter than those at the middle and bottom of the canopy *** wetness duration at the middle was similar to that at the bottom of the canopy position,but about 1.46-3.01 h less than that at the *** soil water deficit condition,the frequency of occurrence of leaf wetness(4.92%-45.45%)followed the order of top>middle>bottom of the canopy *** the onset of leaf wetness was delayed,the onset of wet leaf drying was advanced and the leaf wetness duration was *** wetness duration at the top was linearly related(R^(2)>0.70)to those at the middle and bottom of the canopy positions under different soil water *** conclusion,the hydrological processes at canopy surfaces of rainfed jujube depended on the position of leaves,thus adjusting canopy structure to redistribute hydrological process is a way to meet the water need of jujube.

关键词： canopy position leaf wetness rainfed jujube soil water condition loess hilly region

Epsilon-caprolactone-modified polyethylenimine as a genetic vehicle for stem cell-based bispecific antibody and exosome synergistic therapy

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Regenerative Biomaterials 2023年第1期10卷 97-106页

作者： Yan Tan Jiali Cai zhiyong Wang Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging School of Biomedical EngineeringHealth Science CenterShenzhen UniversityShenzhen 518060China Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of Materials Science and EngineeringCenter for Functional BiomaterialsSun Yat-Sen UniversityGuangzhou 510275China

Bispecific antibodies(BsAb)have gained significant momentum in clinical ***,the rapid enzymolysis and metabolism of protein drugs usually induce short circulation in vivo,and developing an efficient protein delivery system still is a *** stem cells(MSCs)have become an attractive therapeutic carrier for *** modification enables MSCs to express and secrete specific proteins,which is essential for therapeutic ***,efficient gene transfer into MSCs is still a *** this study,we applied epsilon-caprolactone-modified polyethylenimine(PEI-CL)as an efficacy carrier for plasmid transfection into MSC that served as in situ‘cell factory’for anti-CD3/CD20 BsAb ***,the PEI-CL encapsulates the minicircle plasmid and mediates cell transfection ***,the anti-CD3/CD20 BsAb is secreted from MSC and recruited T cell,resulting in highly sensitive cytotoxicity in the human B-cell ***,these stem cells produce exosomes bearing MiR-15a/MiR-16,which could negatively regulate cancer’s oncogenes BCL-2 for adjuvant ***,high immunologic factors like tumor necrosis factor-αand interferon-γare generated and enhance immunotherapy *** engineered MSCs are demonstrated as an efficient route for BsAb production,and these bioactive components contribute to synergistic therapy,which would be an innovative treatment.

关键词： polyethylenimine stem cell bispecific antibody exosome

Review and recent development of internal model design

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Journal of Control and Decision 2018年第1期5卷 94-114页

作者： zhiyong Chen School of Electrical Engineering and Computing The University of NewcastleCallaghanAustralia

Robust output regulation is a controller design theory for achieving reference tracking and disturbance rejection as well as system *** main feature of the theory is that the reference and/or disturbance signals have explicit structural description,especially by an *** decoding this structural information,the desired steady state/input of the system can be completely characterised,albeit not measurable or implementable due to system *** steady state/input description simply copies the exosystem dynamics for simple systems,however,it relies on more complicated steady-state generators in most non-linear *** the steady state/input is characterised,it can be estimated by an internal *** construction of internal model can well compensate for the desired steady state/input resulting in a stabilisation problem about an equilibrium *** control objective is achieved if such a stabilisation problem is *** paper does not ambitiously aim at a complete overview picture of the three decade development of output regulation *** attempts to show a small trail in the garden of vast collections of output regulation results that may lead the audience from simple to advanced internal model design *** particular,it reviews the simple PID structure,the p-copy internal model for linear systems,various internal models for non-linear systems,and the recent development of generalised internal model to accommodate adaptive scheme.

关键词： Internal model output regulation non-linear systems steady-state generator PID

Low-temperature processing of LiZn-based ferrite ceramics by co-doping of V_(2)O_(5)and Sb_(2)O_(3):Composition,microstructure and magnetic properties

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Journal of Materials Science & Technology 2022年第4期99卷 1-8页

作者： Renquan Wang Tingchuan Zhou zhiyong Zhong College of Materials Science and Engineering Sichuan UniversityChengdu 610065China Key Laboratory of Advanced Special Materials&Technology Ministry of EducationChengdu 610065China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China

Low-temperature fired ferrites or ceramics are usually processed by using low-melting materials(e.g.,glasses,oxides,and eutectics)as sintering aids to obtain compact and uniform ***,a dual-strategy of co-doping with V_(2)O_(5)and Sb_(2)O_(3)oxides and forming a eutectic liquid phase has been employed to reduce the melting point of LiZn ferrite ceramics in an effective *** results indicate that miniscule amounts of V_(2)O_(5)and Sb_(2)O_(3)co-doping contribute in producing dense and uniform microstructures with enhanced magnetic performance by low-temperature *** phase structural and microstructural evolutions have been studied in *** their correlations with magnetic properties have been *** magnetic performance(B_(s)=475.4 mT,M_(s)=82.51 emu/g,B_(r)/B_(s)=0.85,H_(c)=2.2 Oe,ΔH=153.8 Oe)of the LiZn-based ferrite ceramics is achieved by optimized composition and microstructure,which shows great potential for microwave applications including phase shifters and *** importantly,such a co-doping strategy can be also extended to other material systems,like dielectric ceramics,hexagonal ferrites or piezoelectric ceramics.

关键词： Low-temperature firing Eutectic liquid phase Magnetic properties Uniform microstructure FMR line width

Outlier Robust Feature Correspondence by Learning Based Matching Process

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Journal of Systems Science & Complexity 2024年第4期37卷 1351-1367页

作者： YANG Xu ZENG Shaofeng LIU zhiyong State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of Automation of Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China

Feature correspondence is a crucial aspect of various computer vision and robot vision *** traditional optimization-based matching techniques,researchers have recently adopted a learning-based approach for matching,but these methods face challenges in dealing with outlier *** paper presents an outlier robust feature correspondence method that employs a pruned attentional graph neural network and a matching layer to address the outlier ***,the authors introduce a modified cross-entropy matching loss to handle the outlier *** a result,the proposed method significantly enhances the performance of learning-based matching algorithms in the presence of outlier *** experiments confirm the effectiveness of the proposed approach.

关键词： Feature correspondence graph neural network optimal transport problem pointmatching

A new route for length measurement by phase-shifting interferometry

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Science China(Physics,Mechanics & Astronomy) 2012年第4期55卷 599-604页

作者： LUO zhiyong LI ZhangHong National Institute of Metrology Beijing 100013China

By the mathematic models of flexible hinge,the accurate relationship between the phase-shifting and pressure acting on the hinge is deduced and verified by experimental *** the optimization of the geometric parameter of flexible hinge,a phase-shifting generator is developed to determine the length of an object precisely by *** experiments show that the triple phase-shifting produced using this generator is up to 1 *** this generator,an example for the application in length measurement is *** result shows the length uncertainty is 0.5 nm when the temperature uncertainty is limited in 2 *** paper provides a novel technique to measure the dimension of an object,especially to the diameter of a silicon sphere for Avogadro constant project.

关键词： phase-shifting interferometry flexible hinge mathematics model piezoelectricity transducer Etalon