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Molecular Plant 2012年第4期5卷 945-947页

作者： Xiao-Dong Deng Bo gu Ya-Jun Li Xin-wen Hu jian-Chun guo Xiao-wen Fei Key Laboratory of Biology and Genetic Resources of Tropical Crops Ministry of AgricultureInstitute of Tropical Bioscience and BiotechnologyChinese Academy of Tropical Agricultural ScienceHaikou 571101China Department of Biochemistry Hainan Medical CollegeHaikou571101China College of Agronomy Hainan UniversityHaikou571101China

Dear Editor, Triacylglycerols （triglycerides）（TAGs）, as the major storage forms of energy, mainly are stored in adipocytes, myocytes, enterocytes, hepatocytes, and mammary epithelial cells in mammals, oilseeds in plants, and lipid droplets in microorgan- isms （Yen et al., 2008）. Aside from energy storage, TAGs have essential functions in multiple physiological processes. In plants, TAGs are crucial for seed oil accumulation, germina- tion, and seedling development （Zhang et al., 2005, 2009）. Notably, TAGs derived from plants and microorganisms could serve as the feedstock for biofuels production （Deng et al., 2009）. Therefore, understanding of the molecular basis of TAGs bio- synthesis and storage is of considerable economic importance.

关键词： biosynthesis TAGGING Lipid Droplets Microbes plants breast epithelium cell Physiological Processes Storage Diacylglycerol O-Acyltransferase Chlamydomonas reinhardtii aluminium Triglycerides Chlorophyceae

Vapor-assisted epitaxial growth of porphyrin-based MOF thin film for nonlinear optical limiting

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Science China Chemistry 2020年第8期63卷 1059-1065页

作者： Yi-Hong Xiao Zhi-Gang gu jian Zhang State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China

Fabrication of metal-organic frameworks(MOFs)thin films has been an efficient way to expand their functionalities and ***,we use the vapor-assisted deposition(VAD)method to epitaxially grow a porphyrin-based MOF PCN-222 *** is,vapor source assists to deposit pre-treated precursor solution on quartz substrate to form a continuous PCN-222 ***,utilizing the post-treated encapsulation of functional carbon-based nanoparticles,the carbon nanodots(CND)and Pt doped CND(Pt/CND)are well loaded into the pores of PCN-222 film,the size(~3.1 nm)of which is highly close to the pore size of the corresponding MOF(~3.7 nm).The Z-scan results reveal that PCN-222 film exhibits high reverse saturable *** addition,encapsulation of carbon based nanodots into PCN-222 film could enhance the nonlinear optical limiting effect benefiting from the host-guest *** study serves to present both the available toolbox of thin film preparation and high potential for precise synthetic nanocomposite films in optical limiting devices.

关键词： metal-organic framework epitaxial growth porphyrin thin film nonlinear optical property

Fatigue life research and experimental verification of superalloy thin-walled structures subjected to thermal-acoustic loads

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Chinese Journal of Aeronautics 2020年第2期33卷 598-608页

作者： jian WANG Fengtong ZHAO Yundong SHA Song gu Department of Aircraft Maintenance Engineering Chengdu Aeronautic PolytechnicChengdu 610100China Liaoning Key Laboratory of Advanced Test Technology for Aeronautical Propulsion System Shenyang Aerospace UniversityShenyang 110136China

Rapid alternating stress is formed in structure subjected to harsh thermal-acoustic loads,which will affect fatigue performance and reduce fatigue life ***,fatigue experiment of superalloy thin-walled structure was carried out to obtain fatigue damage location and failure time of the experiment specimen,and S-iN curves of superalloy thin-walled structure at 723 K were ***,dynamic response simulation of superalloy thin-walled structure under the same load as experiment was implemented,and fatigue life was estimated based on the fatigue life prediction model which mainly included:improved rain-flow counting method,Morrow average stress model and Miner linear cumulative damage ***,comparisons between simulation solutions and experimental results achieved a consistency,which verified the validity of the Fatigue Life Prediction Model(FLPM).Moreover,taking a rectangle plate as the analysis object,the distributions of Fain-low circulation blocks and damage levels of the structure were discussed ***,current research indicates that in pre-buckling the structure is in softened area and fatigue life decreases with the increase of temperature;in post-buckling the structure is in hardened area and fatigue life increases with the increase of temperature within a certain range.

关键词： Experimental verification Fatigue life Improved rain-flow counting method Rain-flow cycle matrix Rain-flow damage matrix Thermal-acoustic load Thin-walled structures

A review on conventional and nonconventional machining of SiC particle-reinforced aluminium matrix composites

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Advances in Manufacturing 2020年第3期8卷 279-315页

作者： Ji-Peng Chen Lin gu guo-jian He School of Mechanical and Electronic Engineering Nanjing Forestry UniversityNanjing 210037People’s Republic of China Department of Mechanical Engineering Polytechnic University of MilanPiazza Leonardo da Vinci 32Milan 20133Italy State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Among the various types of metal matrix composites,SiC particle-reinforced aluminum matrix composites(SiCp/Al)are finding increasing applications in many industrial fields such as aerospace,automotive,and ***,SiCp/Al composites are considered as difficult-to-cut materials due to the hard ceramic reinforcement,which causes severe machinability degradation by increasing cutting tool wear,cutting force,*** improve the machinability of SiCp/Al composites,many techniques including conventional and nonconventional machining processes have been *** purpose of this study is to evaluate the machining performance of SiCp/Al composites using conventional machining,i.e.,turning,milling,drilling,and grinding,and using nonconventional machining,namely electrical discharge machining(EDM),powder mixed EDM,wire EDM,electrochemical machining,and newly developed high-efficiency machining technologies,e.g.,blasting erosion arc *** research not only presents an overview of the machining aspects of SiCp/Al composites using various processing technologies but also establishes optimization parameters as reference of industry applications.

关键词： SiCp/Al Machining Conventional Wear mechanism Nonconventional Performance

Optimal Grading Policies in the Online Acquisition of Used Products

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Journal of Systems Science and Systems Engineering 2021年第1期30卷 29-43页

作者： Xiang Chu Zhong wen jian Chen School of Maritime Economics and Management Dalian Maritime UniversityDalian116026China International Business School Beijing Foreign Studies UniversityBeijing100089China School of Economics and Management Tsinghua UniversityBeijing100084China

Although online reverse commerce(recommerce)is convenient and efficient,it is not without *** limits recommerce firms’flexibility to offer personalized prices and may cause mismatched grading between the firms and sellers of used *** study examines a recommerce firm’s decision on grading criteria and *** find that the firm’s optimal policy exhibits two distinctly different patterns depending on the trade value of the *** demonstrate that sellers’overestimate and underestimate errors have qualitatively different effects on firm profitability,and the effects crucially rely on the type of optimal *** findings can apprise firms on how to preset sorting criteria and prices as well as reduce grading errors.

关键词： Closed-loop supply chains used-product acquisition management recommerce grading error grading policy

Tunable chiroptical application by encapsulating achiral lanthanide complexes into chiral MOF thin films

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Nano Research 2022年第2期15卷 1102-1108页

作者： Rui Zhai Yihong Xiao Zhigang gu jian Zhang State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China University of Chinese Academy of Sciences Beijing 100049China

Chiral metal-organic frameworks(chirMOFs)have been widely considered on enantioselective adsorption/separation,asymmetric catalysis,biological and nonlinear optical ***,chirMOFs are facing a great challenge in development of chiroptical thin films with circularly polarized luminescence(CPL)***,we first report CPL thin films by encapsulating achiral lanthanide complexes Ln(acac)_(3)(Ln=Eu_(a)Tb_(b)Gd_(c))into the pores of surface-coordinated chirMOF thin films(SURchirMOF)[Zn_(2)(cam)_(2)dabco]_(n) with layer by layer(Ibl)encapsulation *** to the unique combination of chiral porous MOF and adjustable luminescent complexes in the host-guest thin films,the obtained Ln(acac)_(3)@SURchirMOF possess strong and tunable CPL property with high dissymmetry *** compared CPL and fluorescent lifetime results show that the advantage of this preparation strategy can effectively achieve energy transfer from Ln(acac)_(3) to SURchirMOF,resulting in an excellent CPL *** study not only provides a novel strategy to develop new types of chiral thin films but also offers an efficient approach for tunable chiroptical applications.

关键词： metal-organic frameworks lanthanide complexes thin films encapsulation chiral optical application

Suppressing nonlinear aeroelastic response of laminated composite panels in supersonic airflows using a nonlinear energy sink

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Chinese Journal of Aeronautics 2021年第2期34卷 376-385页

作者： jian ZHOU Minglong XU Zhichun YANG Yingsong gu State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace EngineeringXi'an Jiaotong UniversityXi'an 710049China School of Aeronautics Northwestern Polyteclmical UniversityXi'an 710072China

This paper proposes using a Nonlinear Energy Sink(NES) to suppress the nonlinear aeroelastic response of laminated composite panels in supersonic airflows. Relevant aeroelastic equations are established using Hamilton’s principle and a finite element approach, drawing upon Von Karman’s large deflection theory and first order piston theory. The idea of the NES suppression region is proposed and the effects of NES parameters on the NES suppression region are studied in detail. The results show that the nonlinear aeroelastic responses of the panel can be completely suppressed by the Transient Resonance Capture(TRC);the appropriate NES parameter values can increase the critical dynamic pressure for flutter and suppress the nonlinear aeroelastic response effectively. Increasing the mass ratio of the NES can improve the NES suppression region;the nonlinear stiffness coefficient and damping of the NES within a specific range can suppress the nonlinear aeroelastic response. The most effective installation position for a NES is in a specific region behind the center-line of the panel in the direction of the airflow.

关键词： Aeroelasticity Laminated composite panel Nonlinear dynamics Nonlinear energy sink Panel flutter Passive suppression

An Improved Formulation of Singular Boundary Method

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Advances in Applied Mathematics and Mechanics 2012年第5期4卷 543-558页

作者： wen Chen Yan gu College of Harbour Coastal and Offshore EngineeringHohai UniversityNo.1 Xikang RoadNanjingJiangsu 210098China

This study proposes a new formulation of singular boundary method(SBM)to solve the 2D potential problems,while retaining its original merits being free of integration and mesh,easy-to-program,accurate and mathematically simple without the requirement of a fictitious boundary as in the method of fundamental solutions(MFS).The key idea of the SBM is to introduce the concept of the origin intensity factor to isolate the singularity of fundamental solution so that the source points can be placed directly on the physical *** paper presents a new approach to derive the analytical solution of the origin intensity factor based on the proposed subtracting and adding-back *** the troublesome sample nodes in the ordinary SBM are avoided and the sample solution is also not necessary for the Neumann boundary *** benchmark problems are tested to demonstrate the feasibility and accuracy of the new formulation through detailed comparisons with the boundary element method(BEM),MFS,regularized meshless method(RMM)and boundary distributed source(BDS)method.

关键词： Singular boundary method fundamental solution singularity desingularization technique meshless

Tau in Alzheimer’s Disease:Pathological Alterations and an Attractive Therapeutic Target

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Current Medical Science 2020年第6期40卷 1009-1021页

作者： jian-lan gu Fei LIU Department of Biochemistry and Molecular Biology School of MedicineNantong UniversityNantong 226001China Key Laboratory of Neuroregeneration and Ministry of Education of jiangsu Co-innovation Center of NeuroregenerationNantong 226001China Department of Neurochemistry Inge Grundke-Iqbal Research FloorNew York State Institute for Basic Research in Developmental DisabilitiesStaten IslandNY 10314USA

Alzheimer’s disease(AD)is an age-related neurodegenerative disease with two major hallmarks:extracellular amyloid plaques made of amyloid-β(Aβ)and intracellular neurofibrillary tangles(NFTs)of abnormally hyperphosphorylated *** number of NFTs correlates positively with the severity of dementia in AD ***,there is still no efficient therapy available for AD treatment and prevention so far.A deeper understanding of AD pathogenesis has identified novel strategies for the generation of specific therapies over the past few *** studies have suggested that the prion-like seeding and spreading of tau pathology in the brain may be a key driver of *** protein is considered as a promising candidate target for the development of therapeutic interventions due to its considerable pathological role in a variety of neurodegenerative *** tau hyperphosphorylation plays a detrimental pathological role,eventually leading to *** the present review,we describe the recent research progresses in the pathological mechanisms of tau protein in AD and briefly discuss tau-based therapeutic strategies.

关键词： Alzheimer’s disease tau protein hyperphosphorylation propagation of tau pathology

Improved Particle Filter for Non-Gaussian Forecasting-aided State Estimation

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Journal of Modern Power Systems and Clean Energy 2023年第4期11卷 1075-1085页

作者： Lyuzerui Yuan Jie gu Honglin wen Zhijian Jin School of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Gaussian assumptions of non-Gaussian noises hinder the improvement of state estimation *** this paper,an asymmetric generalized Gaussian distribution(AGGD),as a unified representation of various unimodal distributions,is applied to formulate the non-Gaussian forecasting-aided state estimation *** address the problem,an improved particle filter is proposed,which integrates a near-optimal AGGD proposal function and an AGGD sampling method into the typical particle *** AGGD proposal function can approximate the target distribution of state variables to greatly alleviate particle degeneracy and promote precise estimation,through considering both state transitions and latest *** rapid particle generation from the AGGD proposal function,an efficient inverse cumulative distribution function(CDF)sampling method is employed based on the derived approximation of inverse CDF of *** simulations are carried out on a modified balanced IEEE 123-bus test *** results validate that the proposed method outperforms other popular state estimation methods in terms of accuracy and robustness,whether in Gaussian,non-Gaussian,or abnormal measurement errors.

关键词： State estimation particle filter asymmetric generalized Gaussian distribution non-Gaussian noise