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An action-based Markov chain modeling approach for predicting the window operating behavior in office spaces

Building Simulation 2021年第2期14卷 301-315页

作者： Xin Zhou Tiance Liu Da yan xing Shi xing Jin School of Architecture Southeast UniversityNanjingJiangsu Province210096China School of Architecture Tsinghua UniversityBeijing100084China

Reliable energy and performance prediction for building design and planning is important for newly-designed or retrofitted *** operating behavior has an important influence on the ventilation and energy consumption of these buildings under different realistic ***,quantitatively describing this behavior and constructing a prediction model are *** this work,an action-based Markov chain modeling approach for predicting window operating behavior in office spaces was *** summer measurement data(2016 and 2018)were used to verify the accuracy and validity of the modeling *** opening rate,outdoor temperature,time distribution,and on-off curve were proposed as four inspection *** study also compared the prediction performance between the action-based Markov chain modeling approach with the state-based Markov chain modeling approach,which is the most popular modeling approach to model occupant window operating *** study proved that the yearly variation of occupants’behavior performed a form of action that remained unchanged during a certain ***,the results also proved that the action-based Markov chain modeling approach can reflect the actual window operating behavior accurately within an open-plan office,which is a beneficial supplement for energy-consumption simulation software in a window-state prediction *** state-based Markov chain modeling approach showed better stability and accuracy in terms of the opening rate,whereas the action-based Markov chain modeling approach showed good consistency with the measurement data in the on-off curves and in situations with little *** the on-off curves,the accuracy of action-based modeling approach in the prediction of window open-state is 20%higher.

关键词： window operating behavior stochastic-numerical model action-based modeling approach stochastic model verification

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Impacts of Integrated Multi-Trophic Aquaculture on Phytoplankton in Sanggou Bay

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Journal of Ocean University of China 2024年第3期23卷 835-843页

作者： HAN Jichang LIU xing PAN Kehou LIU Jiaojiao SUN yan JIN Guiyong LI yun LI Yuhang College of Food Science and Engineering Ningbo UniversityNingbo 315832China Key Laboratory of Mariculture(Ocean University of China) Ministry of EducationQingdao 266003China Function Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao 266100China Laboratory of Marine Organism Taxonomy and Phylogeny Institute of OceanologyChinese Academy of SciencesQingdao 266071China

Integrated multi-trophic aquaculture(IMTA)has been considered as an ecofriendly culture system providing a potential solution to environmental risks caused by intensive monoculture ***,the impact of IMTA on phytoplankton remains *** this study,the spatial and temporal variations of phytoplankton in Sanggou Bay were investigated seasonally based on 21 sampling sites covering three cultivation zones(bivalve zone,IMTA zone,and kelp zone)and one control zone(without aquatic cultivation).In total,128 phytoplankton species,with diatoms and dinoflagellates as the dominant groups,were obtained across the whole year,and the mean Shannon diversity index(H')and species richness(SR)were determined as 1.39 and 9.39,*** maximum chlorophyll a(Chl-a)(6.32μg L^(-1))and plankton diversity(H'of 1.97)occurred in summer and autumn,*** to other zones,the bivalve zone displayed significantly higher Chl-a and lower H'in majority of *** PERMANOVA analysis indicated that the phytoplankton assemblage in the bivalve zone was significantly different with the control and kelp zones,while the IMTA zone maintained close to other three *** on generalized additive models,temperature,NO_(2)^(-)-N,N/P ratio,SiO_(3)^(2-)-Si,and salinity were determined as the key factors underlying Chl-a and phytoplankton ***-tionally,the results of redundancy analysis further indicated that the phytoplankton assemblage in the bivalve zone is positively re-lated with nutrients such as NO_(3)^(-)-N and NH_(4)^(+)-N as well as water depth,while the phytoplankton assemblages in the kelp,control,and IMTA zones are associated with NO_(2)^(-)-N,SiO_(3)^(2-)-Si,and *** all observations into consideration together,it can be inferred that IMTA can effectively reduce Chl-a level compared to bivalve monoculture by reducing the ***,the SR,H’,and species composition of phytoplankton are primarily determined by local environment fa

关键词： phytoplankton diversity Sanggou Bay integrated multi-trophic aquaculture

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Strong Convergence Theorems of Common Elements for Equilibrium Problems and Fixed Point Problems in Banach Spaces

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Acta Mathematicae Applicatae Sinica 2012年第2期28卷 337-350页

作者： xing-hui GAO Hai-yun ZHOU College of Mathematics and Computer Science Yanan UniversityYanan 716000China Department of Mathematics Shijiazhuang Mechanical Engineering UniversityShijiazhuang 050003China

In this paper, we consider hybrid algorithms for finding common elements of the set of common fixed points of two families quasi-C-non-expansive mappings and the set of solutions of an equilibrium problem. We establish strong convergence theorems of common elements in uniformly smooth and strictly convex Banach spaces with the property （K）.

关键词： strong convergence projection quasi-Ф-nonexpansive mapping common elements theproperty (K)

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Immersed Hypersurfaces in the Unit Sphere S^(m+1) with Constant Blaschke Eigenvalues

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Acta Mathematica Sinica,English Series 2007年第3期23卷 533-548页

作者： xing Xiao LI Feng yun ZHANG Department of Mathematics He'nan Normal University Xinxiang 453007 He'nan P. R. China

For an immersed submanifold x ： M^m→ Sn in the unit sphere S^n without umbilics, an eigenvalue of the Blaschke tensor of x is called a Blaschke eigenvalue of x. It is interesting to determine all hypersurfaces in Sn with constant Blaschke eigenvalues. In this paper, we are able to classify all immersed hypersurfaces in S^m＋1 with vanishing MSbius form and constant Blaschke eigenvalues, in case （1） x has exact two distinct Blaschke eigenvalues, or （2） m = 3. With these classifications, some interesting examples are also presented.

关键词： Moebius form Blaschke eigenvalues Blaschke tensor MSbius metric MSbius second fundamental form

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On the Blaschke Isoparametric Hypersurfaces in the Unit Sphere

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Acta Mathematica Sinica,English Series 2009年第4期25卷 657-678页

作者： xing Xiao LI Feng yun ZHANG Department of Mathematics. He'nan Normal University Xinxiang 453007 P. R. China

Given an immersed submanifold x ： M^M → S^n in the unit sphere S^n without umbilics, a Blaschke eigenvalue of x is by definition an eigenvalue of the Blaschke tensor of x. x is called Blaschke isoparametric if its Mobius form vanishes identically and all of its Blaschke eigenvalues are constant. Then the classification of Blaschke isoparametric hypersurfaces is natural and interesting in the MSbius geometry of submanifolds. When n = 4, the corresponding classification theorem was given by the authors. In this paper, we are able to complete the corresponding classification for n = 5. In particular, we shall prove that all the Blaschke isoparametric hypersurfaces in S^5 with more than two distinct Blaschke eigenvalues are necessarily Mobius isoparametric.

关键词： Mobius form Blaschke eigenvalues Blaschke tensor Mobius metric Mobius second fundamental form

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Differentially expressed miRNAs in anthers may contribute to the fertility of a novel Brassica napus genic male sterile line CN12A

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Journal of Integrative Agriculture 2020年第7期19卷 1731-1742页

作者： DONG yun WANG Yi JIN Feng-wei xing Lijuan FANG yan ZHANG Zheng-ying ZOU Jun-jie WANG Lei XU Miao-yun Crop Research Institute Gansu Academy of Agricultural SciencesLanzhou 730070P.R.China National Key Facility for Crop Gene Resources and Genetic ImprovementBiotechnology Research Institute Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Gansu Provincial Key Lab of Aridland Crop Sciences/Gansu Agricultural University Lanzhou 730070.P.R.China

In Brassica napus L.(rapeseed),complete genic male sterility(GMS)plays an important role in the utilization of *** microRNAs(miRNAs)play essential regulatory roles during bud development,knowledge of how GMS is regulated by miRNAs in rapeseed is rather *** this study,we obtained a novel recessive GMS system,*** sterile line CN12A has defects in tapetal diferentiation and *** sequencing was employed to examine the expression of miRNAs in the buds of CN12A and the fertile line *** identifed 85 known miRNAs and 120 novel miRNAs that were expressed during rapeseed anther *** comparing the expression levels of miRNAs between CN12A and CN12B,19 and 18 known miRNAs were found to be difrentially expressed in 0.5--1.0 mm buds and in 2.5--3.0 mm buds,*** these,the expression levels of 14 miRNAs were higher and the levels of 23 miRNAs were lower in CN12A compared with *** predicted target genes of these iferentially expressed miRNAS encode protein kinases,F-box domain-containing proteins,MADS-box family proteins,SBP-box gene family members,HD ZIP proteins,floral homeotic protein APETAL A 2(AP2)。and nuclear factor Y,subunit *** targets have previously been reported to be involved in pollen development and male sterility,suggesting that miRNAs might act as regulators of GMS in rapeseed ***,RT-qPCR data suggest that one of the dffrentially expressed miRNAs,bna-miR159,plays a role in tapetal differentiation by regulating the expression of transcription factor BnMYB101 and participates in tapetal degradation and infuences callose degradation by manipulating the expression of *** findings contibute to our understanding of the roles of miRNAs during anther development and the occurrence of GMS in rapeseed.

关键词： Brassica napus L. genic male sterility miRNAs targets molecular regulation network

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Constructing ECOC based on confusion matrix for multiclass learning problems

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Science China(Information Sciences) 2016年第1期59卷 135-148页

作者： Jindeng ZHOU yun yanG Mingjie ZHANG Haibo xing Science and Technology on Complex Aviation Systems Simulation Laboratory

In the pattern recognition field, error-correcting output codes(ECOC) are a powerful tool to fuse any number of binary classifiers to model multiclass problems, and the research of encoding based on data is attracting more and more attention. In this paper, we are going to propose a new encoding method for constructing subclass Error-Correcting Output Codes, which was first introduced by Escalera et al. To achieve this goal, we first obtain the correlation between each pair of classes with the help of confusion matrix. Then,we select the most easily separated subclasses for classification by following Fisher's principle. At last, we were able to obtain binary partitions based on subclasses. After finishing this work, a new data-driven coding matrixSubclass ECOC will be achieved. Experimental results on University of California Irvine data sets and three kinds of high resolution range profile data sets with logistic linear classifier and support vector machine as the binary classifiers show that our approach can provide a better performance and the robustness of classification with a little longer but acceptable code length.

关键词： machine learning multiclass classification error correcting output codes subclass partition confusion matrix

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Instability of roll nonlinear system with structural clearance in rolling process

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Journal of Iron and Steel Research International 2023年第1期30卷 112-125页

作者： Jin-xing Cui yan Peng Jin Wang National Engineering Research Center for Equipment and Technology of Cold Rolled Strip School of Mechanical EngineeringYanshan UniversityQinhuangdao 066004HebeiChina

The vibration instability of the nonlinear dynamic system of the rolls considering the structural clearance was theoretically investigated,which is caused by the roll assembly accuracy deviation in the hot rolling ***,the dynamic rolling force model was established based on the Wekbrod model under the influence of the roll grinding deviation and the stability of the deformation ***,the horizontal and vertical direction coupling dynamic model of the work roll was established considering the structural clearance between the roll and mill ***,the nonlinear dynamic equation was solved by the Runge-Kutta *** simulation results show that the dynamic system presents the nonlinear vibration characteristics,which shows that the instability of the system is a slowly varying response process with the characteristics of self-excited vibration and forced ***,the comparison results show the consistency between the simulation and the test.

关键词： Roll grinding accuracy Dynamic rolling force Structural clearance Collision Rolling mill instability

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Facile synthesis of monodispersed copper oxalate flaky particles in the presence of EDTA

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International Journal of Minerals,Metallurgy and Materials 2018年第7期25卷 762-769页

作者： xing Chert Kai Huang Cheng-yan Wang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Lab of Green Recycling and Extraction of Metals University of Science and Technology BeijingBeijing 100083China

Monodispersed copper oxalate paxticles with flaky morphology were prepared via a simple one-pot synthesis method. Scanning electron microscope （SEM）, X-ray diffraction （XRD）, and fourier tza^sform infraJced （FTIR） spectra were used to characterize paxticle mor- phology, size, phase composition, and functional groups. It was found that the presence of ethylenediaminetetzaacetic acid （EDTA） and the solution pH value had strong influence on the morphological and size evolution of the precipitated particles. On the basis of controlled re- lease of copper ions from a Cu2＋-EDTA complex and Weimazn＇s law, a stzategy for the controlled synthesis of monodispersed copper oxa- late paxticles was designed by refemng to the basic mode of the St0ber method. The inherent nature of crystallization to form the flaky solid in the early stage of precipitation as well as the driving force of the long-lasting low supersaturation in the growth stage was proposed to ex- plain the size and morphological evolution of the copper oxalate precipitates. Thermodynamic equilibrium concentrations of copper（II） spe- cies in the Cu（II）-EDTA-oxalate-H20 solution system were calculated to help explain the possible formation mechaNsm of copper oxalate precipitates.

关键词： copper oxalate flaky morphology ethylenediaminetetzaacetic acid one-pot synthesis

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Optimization of Multi-energy Microgrids with Waste Process Capacity for Electricity-hydrogen Charging Services

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CSEE Journal of Power and Energy Systems 2022年第2期8卷 380-391页

作者： Jiajia yan yun Teng Zhe Chen Shenyang University of Technology Shenyang 110870China Department of Energy Technology Aalborg UniversityAalborg DK-9220Denmark

The highway service area,with facilities for electricity-hydrogen charging,includes multi-energy load energy demands and domestic waste process *** on these needs,a fully renewable energy based multi-energy microgrid with electricity-hydrogen charging services and waste process capacity is *** paper studies the energy input and output characteristics of multi-energy conversion and storage devices,and establishes the model for electricity-hydrogen charging microgrid(EH-CMG).The multi-energy conversion,storage characteristics and multi-energy flow coordination in the EHCMG are then *** optimization model and its algorithm solution,based on constraints such as the charging time of vehicles,the reliability of multi-energy load energy supply and the available grid regulation performance in the EH-CMG,are *** proposed optimization of EH-CMG is illustrated with the actual multi-energy operation data of a highway service area in northwest *** results demonstrate that the proposed EH-CMG and its optimization method can achieve economic benefits for a multi-energy system with the ability of waste process,electricity-hydrogen charging,and also provide better regulation characteristics for the power grid.

关键词： Electricity-hydrogen charging microgrid renewable energy waste process capacity

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