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Distributed Economic MPC for Synergetic Regulation of the Voltage of an Island DC Micro-Grid

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 734-745页

作者： Yi Zheng Yanye Wang xun meng Shaoyuan Li Hao Chen IEEE the Department of Automation Shanghai Jiao Tong UniversityShanghai 200240 the Key Laboratory of System Control and Information Processing Ministry of Education of ChinaShanghai 200240China Haixi Institutes Chinese Academy of SciencesJinjiang 362216China

In this paper,distributed model predictive control(DMPC) for island DC micro-grids(MG) with wind/photovoltaic(PV)/battery power is proposed,which coordinates all distributed generations(DG) to stabilize the bus voltage together with the insurance of having computational efficiency under a real-time *** on the feedback of the bus voltage,the deviation of the current is dispatched to each DG according to cost over the prediction ***,to avoid the excessive fluctuation of the battery power,both the discharge-charge switching times and costs are considered in the model predictive control(MPC) optimization problems.A Lyapunov constraint with a time-varying steady-state is designed in each local MPC to guarantee the stabilization of the entire *** voltage stabilization of the MG is achieved by this strategy with the cooperation of *** numeric results of applying the proposed method to a MG of the Shanghai Power Supply Company shows the effectiveness of the distributed economic MPC.

关键词： Distributed model predictive control(DMPC) Lyapunovbased model predictive control micro-grid(MG) voltage control

Nonlinear semi-analytical modeling of liquid sloshing in rectangular container with horizontal baffles

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Applied Mathematics and Mechanics(English Edition) 2023年第11期44卷 1973-2004页

作者： xun meng Ying SUN Jiadong WANG Ruili HUO Ding ZHOU College of Civil Engineering Nanjing Tech UniversityNanjing 211816China School of Transportation and Civil Engineering Nantong UniversityNantong 226019Jiangsu ProvinceChina Faculty of Civil Engineering and Mechanics Jiangsu UniversityZhenjiang 212013Jiangsu ProvinceChina

A nonlinear semi-analytical scheme is proposed for investigating the finiteamplitude nonlinear sloshing in a horizontally baffled rectangular liquid container under the seismic *** sub-domain method is developed to analytically derive the modal behaviors of the baffled linear *** viscosity dissipation effects from the interior liquid and boundary layers are *** the introduction of the generalized time-dependent coordinates,the surface wave elevation and velocity potential are represented by a series of linear modal *** infinite-dimensional modal system of the nonlinear sloshing is formulated based on the Bateman-Luke variational principle,which is further reduced to the finite-dimensional modal system by using the NarimanovMoiseev asymptotic *** base force and overturning moment induced by the nonlinear sloshing are derived as the functions of the generalized time-dependent *** present results match well with the available analytical,numerical,and experimental *** paper examines the surface wave elevation,base force,and overturning moment versus the baffle parameters and excitation amplitude in detail.

关键词： rectangular container nonlinear sloshing baffe sub-domain multi-modal method

Analytical Modeling of Fluid Sloshing in A 2D Rectangular Container with A Bottom-Mounted T-Shaped Baffle

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China Ocean Engineering 2022年第2期36卷 299-310页

作者： meng xun MA Xiao-zhong ZHANG You-ming FANG Hai ZHOU Ding College of Civil Engineering Nanjing Tech UniversityNanjing 211816China Flood Control and Drought Relief Rescue Center of Jiangsu Province Nanjing 211500China

An analytical procedure is presented to evaluate the fluid sloshing characteristics in a two-dimensional(2D)rectangular container with a bottom-mounted T-shaped *** fluid region is divided into several sub-domains with hypothetical interfaces and the velocities and pressures of the fluid on adjacent interfaces should be *** separation of variables in conjunction with the superposition principle is employed to formulate the velocity potential of each *** Fourier series expansion is used to derive the eigenvalue equation by substituting the velocity potential solutions into the free surface conditions and the continuity conditions on adjacent *** the horizontal base excitation,the total velocity potential of fluid is decomposed of the impulsive and perturbed velocity *** orthogonality of the sloshing modes is demonstrated by implementing Gauss *** dynamic response equation is established by incorporating the total velocity potential solution into the surface wave *** agreements are achieved between the present results and those from the reported literature and finite element *** results are exhibited to reveal the effect of the baffle parameters and excitation frequency on sloshing characteristics and responses of liquid.

关键词： rectangular container T-shaped baffle sub-domain sloshing characteristics dynamic response

Harnessing the capabilities of VCSELs:unlocking the potential for advanced integrated photonic devices and systems

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Light(Science & Applications) 2024年第10期13卷 2075-2100页

作者： Guanzhong Pan meng xun Xiaoli Zhou Yun Sun Yibo Dong Dexin Wu Institute of Microelectronics Chinese Academy of SciencesBejingChina institute of Photonic Chips University of Shanghai for Science and TechnologyShanghaiChina

Vertical cavity surface emitting lasers(VCSELs)have emerged as a versatile and promising platform for developing advanced integrated photonic devices and systems due to their low power consumption,high modulation bandwidth,small footprint,excellent scalability,and compatibility with monolithic *** combining these unique capabilities of VCSELs with the functionalities offered by micro/nano optical structures(***),it enables various versatile energy-efficient integrated photonic devices and systems with compact size,enhanced performance,and improved reliability and *** review provides a comprehensive overview of the stateof-the-art versatile integrated photonic devices/systems based on VCSELs,including photonic neural networks,vortex beam emitters,holographic devices,beam deflectors,atomic sensors,and *** leveraging the capabilities of VCSELs,these integrated photonic devices/systems open up new opportunities in various fields,including artificial intelligence,large-capacity optical communication,imaging,biosensing,and so *** this comprehensive review,we aim to provide a detailed understanding of the pivotal role played by VCSELs in integrated photonics and highlight their significance in advancing the feld towards effcient,compact,and versatile photonic solutions.

关键词： versatile locking holographic

A general strategy for bimetallic Pt-based nano-branched structures as highly active and stable oxygen reduction and methanol oxidation bifunctional catalysts

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Nano Research 2020年第3期13卷 638-645页

作者： Wenjuan Lei menggang Li Lin He xun meng Zijie Mu Yongsheng Yu Frances MRoss Weiwei Yang Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education Jilin Normal UniversityChangchun 130103China Ministry of Industry and Information Technology Key Laboratory of Critical Materials Technology for New Energy Conversion and StorageSchool of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China Key Laboratory of Bioelectrochemistry&Environmental Analysis of Gansu Province College cf Chemistry&Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China Department of Materials Science and Engineering Massachusetts Institute cf TechnologyCambridgeMA 02139USA

The morphology and size of Pt-based bimetallic alloys are known to determine their electrocatalytic performance in reactions relevant to fuel ***,we report a general approach for preparing Pt-M(M=Fe,Co and Ni)bimetallic nano-branched structure(NBs)by a simple high temperature solution-phase ***-prepared Pt-M NBs show a polycrystalline structure and are rich in steps and kinks on the surface,which promote them favorable bifunctional catalytic properties in acidic electrolytes,specifically in terms of the oxygen reduction reaction(ORR)and methanol oxidation reaction(MOR).Specially,Pt-Co NBs/C catalyst shows 6.1 and 5.3 times higher in specific activity(SA)and mass activity(MA)for ORR than state-of-the-art commercial Pt/C catalysts,***,it exhibits a loss of 4.0%in SA and 14.4%in MA after 10,000 cycles of accelerated durability tests(ADTs)compared with the initial *** addition,we also confirmed the superior MOR activity of Pt-Co NBs/C catalyst in acidic *** Pt-M NBs with other alloying metals,the ORR and MOR activities are both higher than commercial catalysts and are in the sequence of Pt-Co/C>Pt-Fe/C>Pt-Ni/C>commercial Pt/C(or PtRu/C).The improved activities and durability can benefit from the morphological and compositional *** synthesis approach may be applied to develop bifunctional catalysts with enhanced ORR and MOR properties for future fuel cells designs.

关键词： Pt-based bimetallic alloy nano-branched structure electrocatalysts,oxygen reduction reaction methanol oxidation reaction

Sociodemographic characteristics and risk factor analysis of Demodex infestation(Acari:Demodicidae)

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第12期12卷 998-1007页

作者： Ya-e ZHAO Na GUO meng xun Ji-ru XU Mei WANG Duo-lao WANG Department of Immunology and Pathogen Biology Xi ＇an Jiaotong University College of Medicine Xi ＇an 710061 China Department of Dermatology the Second Affiliated Hospital Xi ＇an Jiaotong University College of Medicine Xi ＂an 710004 China Department of Epidemiology and Population Health London School of Hygiene and Tropical Medicine London WCIE 7HT UK

To identify sociodemographic characteristics and risk factor of Demodex infestation,756 students aged 13-22 years in Xi'an,China were sampled for the school-based cross-sectional *** was examined using the cellophane tape method(CTP).The results showed that the total detection rate of Demodex was 67.6%.Logistic regression analysis revealed that five variables(gender,residence,sharing sanitary ware,frequency of face-wash per day,and use of facial cleanser) were found to be uncorrelated with Demodex infestation,whereas three variables(age,skin type,and skin disease) were found to be independent *** aged over 18 years had 22.1 times higher odds of Demodex infestation compared to those under 16 years and students aged 16-18 years also had 2.1 times higher odds compared to those aged 13-15 *** of having a Demodex infestation for oily or mixed skin were 2.1 times those for dry or neutral *** with a facial skin disease had 3.0 times higher odds of being infested with Demodex compared to those *** inception rate of students with facial dermatoses increased in parallel with increasing mite *** inception rates were 21.3%,40.7%,59.2%,and 67.7% in the negative,mild,moderate,and severe infestation groups,respectively(χ2=60.6,P<0.001).Specifically,the amount of infested mites and inception rate of acne vulgaris were positively correlated(R2=0.57,moderate infestation odds ratio(OR)=7.1,severe infestation OR=10.3).It was concluded that Demodex prevalence increases with age,and Demodex presents in nearly all adult *** hyperplasia with oily or mixed skin seems to favour Demodex *** infestation could be associated with acne *** CTP is a good sampling method for studies of Demodex prevalence.

关键词： Students Demodex infestation Sociodemographic characteristics Risk factor Logistic regression analysis Facial dermatosis

Cytoplasmic domain and enzymatic activity of ACE2 are not required for PI4KB dependent endocytosis entry of SARS-CoV-2 into host cells

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Virologica Sinica 2022年第3期37卷 380-389页

作者： Hang Yang Huijun Yuan Xiaohui Zhao meng xun Shangrui Guo Nan Wang Bing Liu Hongliang Wang Department of Pathogen Biology and Immunology School of Basic Medical SciencesXi'an Jiaotong University Health Science CenterXi'an710061China School of Pharmacy Xi’an Jiaotong University Health Science CenterXi'an710061China BioBank The First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an710061China Department of Life Sciences Faculty of Natural SciencesImperial College LondonLondonSW72AZUnited Kingdom Key Laboratory of Environment and Genes Related to Diseases Xi'an Jiaotong UniversityXi'an710061China

The recent COVID-19 pandemic poses a global health *** entry of the causative agent SARS-CoV-2 is mediated by its spike protein interacting with cellular receptor-human angiotensin converting enzyme 2(ACE2).Here,by using lentivirus based pseudotypes bearing spike protein,we demonstrated that entry of SARS-CoV-2 into host cells was dependent on clathrin-mediated endocytosis,and phosphoinositides played essential roles during this *** addition,we showed that the intracellular domain and the catalytic activity of ACE2 were not required for efficient virus ***,we showed that the current predominant Delta variant,although with high infectivity and high syncytium formation,also entered cells through clathrin-mediated *** results provide new insights into SARS-CoV-2 cellular entry and present proof of principle that targeting viral entry could be an effective way to treat different variant infections.

关键词： SARS-CoV-2 Endocytosis Phosphoinositides Angiotensin converting enzyme 2(ACE2) Syncytium

Establishment of a Gene Expression System in Rice Chloroplast and Obtainment of PPT-Resistant Rice Plants

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Agricultural Sciences in China 2009年第6期8卷 643-651页

作者： LI Yi-nü SUN Bing-yao SU Ning meng Xiang-xun ZHANG Zhi-fang SHEN Gui-fang Biotechnology Research Institute Chinese Academy of Agricultural Sciences Beijing 100081 P.R. China College of Life Sciences Suzhou University Suzhou 215123 P.R.China Institute of Crop Sciences Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China

In contrast to the situation of random integration of foreign genes in nuclear transformation, the introduction of genes via chloroplast genetic engineering is characterized by site-specific pattern via homologous recombination. To establish an expression system for alien genes in rice chloroplast, the intergenic region of ndhF and trnL was selected as target for sitespecific integration of PPT-resistant bar gene in this study. Two DNA fragments suitable for homologous recombination were cloned from rice chloroplast genome DNA using PCR technique, and the chloroplast-specific expression vector pRB was constructed by fusing a modified 16S rRNA gene promoter to bar gene together with terminator ofpsbA gene 3 sequence. Chloroplast transformation was carried out by biolistic bombardment of sterile rice calli with the pRB construct. Subsequently, the regenerated plantlets and seeds of progeny arising from reciprocal cross to the wild-type lines were obtained. Molecular analysis suggested that the bar gene has been integrated into rice chloroplast genome. Genetic analysis revealed that bar gene could be transmitted and expressed normally in chloroplast genome. Thus, the bar gene conferred not only selection pressure for the transformation of rice chloroplast genome, but PPT-resistant trait for rice plants as well. It is suggested that an efficient gene expression system in the rice chloroplast has been established by chloroplast transformation technique.

关键词： Oryza sativa L. chloroplast transformation bar gene homologous fragments

Preparation of Polyclonal Antibody against Human MxA Protein and Its Specificity to Diversified Myxovirus Resistant Protein A

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Biomedical and Environmental Sciences 2010年第1期23卷 76-82页

作者： KANG WU PENG LIU XIANG-xun meng LI LIU YAN-HUA LI ZHENG-ZHEN GE JI-CHEN YANG School of Basic Medicine and Biology Suzhou University Suzhou 215123 Jiangsu China School of Life Sciences Huzhou Educational University Huzhou 313000 Zhejiang China

Objective To study the human myxovirus resistant protein A （MxA）, a specifically induced peptide by interferon I, and to use its level as a diagnostic criterion for viral infections. Methods Anti-MxA antisera from immunized mice were prepared with the expressed MxA protein of pET32a-MxA in E. coli BL-21（DE3）. To confirm the antiserum activity and specificity, the expression product of BL21, wild type MxA pEGFP-CI-wMxA and site-directed mutant MxA pEGFP-Cl-mMxA（N589S） stably transfected 3T3 cells and induced A549 cells were detected by Western blot with the antisera using non-MxA transfected or non-IFN-[3 induced cells, intact A549, NIH 3T3 cells transfected with pEGFP-CI and pET32a （＋）-transformed BL-21 as controls. Results The antisera had specific positive immunoreactivity to the NIH3T3 cells transformed with pEGFP-CI-wMxA and pEGFP-CI-mMxA, INF-β induced A549 cells and BL21 proteins expressed with pET32a （＋）-MxA. The hybridization signals from IFN-β induced A549 cells depended on the IFN-β inducing concentrations. Meanwhile, immunohistochemical assay showed that NIH 3T3 cells with pEGFP-C 1-wMxA and pEGFP-C 1-mMxA had 〉 98% of positive cells at 1：50 dilution of the serum and A549 cells induced by 20 ng/mL IFN-[3 for 48 h showed 95% positive cells. pEGFP-Cl-transfected NIH 3T3 cells were all negative. Conclusion Anti-sera are highly specific to diversified MxAs. The antibody is detectable by Western blot, immunocytochemistry and immunofluorescence assay.

关键词： Myxovirus resistant protein A Anti-sera Specificity test