必威(betway·官方网站)西汉姆联-EURO CUP

Online System

Reviewer Login

Editor Login

Author Login

Download

Statement of Competing Interests

Authors Contribution Form

Online Journal

Advanced search

Special subject

Current Issue

Previous Issue

Introduction

Bimonthly, started in 1957
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N

Links

Shanxi Provincial Education Department

Taiyuan University of Technology

location： home> 2019,50(01)

Optimization Approach to Enhancing Static Voltage Stability Under Uncertain Conditions

By minimizing the probability of instability,anoptimization approach to enhancing static voltage stability of power systemunder uncertain conditions was proposed on the basis of the static voltagestability region boundary (SVSRB) and its sensitivity to control variables.Toobtain the explicit approximations to the SVSRB and the sensitivities,on thebasis of the idea of generalized polynomial chaos (gPC),an approach combiningstochastic Galerkin method and primal-dual interior point method wasintrodu...

Taiyuan University of technology 2019,50(01): QIU Yiwei,LIN Jin,WU Hao,SONG Yonghua. ;

PDFviewed：abstract

Framework Planning of Distribution Network Containing Distributed Generation Considering Supply and

This paper analyzed the power outputcharacteristics and the load response characteristics,and built a bi-layerplanning model of the distribution network grid considering DG activemanagement and demand side management.The upper layer minimizes the annualinitial investment cost as objective function,and considers the network radialconnectivity constraint;the lower layer takes the integrated operation cost asobjective function and considers the constraints of network power flow and safeoperation.The...

Taiyuan University of technology 2019,50(01): HE Qinfan,CHEN Hongkun. ;

PDFviewed：abstract

Auto Disturbance Refection Coordinated Control for Sintering Process Based on Chaos Particle Swarm O

On the base of the analysis for materialoperation of sintering mixture and the definition of sinter burn-throughpoint,the control strategy of ADRC (Active Disturbance Rejection Controller)was introduced,and the control parameters of ADRC were optimized by CPSO (ChaosParticle Swarm Optimization),so as to realize the control for trolley speed andits ratio with speed of round roller feeder during sintering process.In orderto determine the sinter burn-through point accurately,and improve theefficienc...

Taiyuan University of technology 2019,50(01): WANG Fubin,LIU Yang,WANG Fuping,GUO Baojun. ;

PDFviewed：abstract

Applications and Challenges of SiC MOSFET in Power System

The drive circuit of SiC MOSFET ingrid-connected inverter and power electronic transformer was designed,thedouble pulse test platform was built to test gate driver,and then thecharacteristics and advantages of resonant gate drive circuit wereintroduced.The principle of overcurrent protection of SiC MOSFET in powersystem was analyzed in detail.Two overcurrent protection schemes wereproposed,and the in feasibility was demonstrated.Finally,several commonapplications of SiC MOSFET in power system wer...

Taiyuan University of technology 2019,50(01): WU Haifu,ZHANG Jianzhong,ZHAO Jin,ZHANG Yaqian. ;

PDFviewed：abstract

An Identification Algorithm for Vulnerable Lines Based on Branch Removal Vulnerability and Transferr

In order to prevent large-scale cascadingoutages effectively,a method based on comprehensive indicators to identifyvulnerable lines was proposed.First,the branch removal distribution factor wasmodified,and the influence of power flow transferring direction wasconsidered,so the branch removal vulnerability was proposed to reflect theremoval vulnerability of the branch.Then,in view of the shortage of traditionalbetweenness,it was improved by the definition of power transmissiondistribution factor,a...

Taiyuan University of technology 2019,50(01): REN Jianwen,DONG Shengxiao,XUE Yingjie. ;

PDFviewed：abstract

Modified Nearest Level Modulation for Modular Multilevel Converter

In order to enhance the quality of outputvoltage of a modular multilevel converter (MMC) with the low amount ofsubmodules,as well as the balance of the upper and lower arms voltage whenusing nearest-level modulation (NLM),an improved NLM method is adopted.Comparedwith conventional NLM method,the advantage of proposed method is that it canincrease the level number of output voltage from N+1 to 2 N+1,reduce the totalharmonic distortion (THD) without changing the average voltage of submodulescapacit...

Taiyuan University of technology 2019,50(01): HU Wenhua,DONG Yun,ZHANG Junren. ;

PDFviewed：abstract

Catalyzed Synthesis of Polyoxymethylene Dimethyl Ethers by Ionic Liquid Supported on Magnetic Nanopa

Magnetic nanoparticle supported ionic liquidcatalysts were prepared.XRD,TEM and FT-IR were used for the characterization ofthe catalysts.The results show that ionic liquid was well supported on magneticnanoparticles.Polyoxymethylene dimethyl ethers (PODE n ) was synthesized viathe reaction catalyzed by the magnetic nanoparticle supported ionic liquidcatalyst.The influences of catalyst dosage,the mole ratio of methanol totrioxane,reaction temperature and reaction time on catalytic activity wereinv...

Taiyuan University of technology 2019,50(01): ZHANG Tonglu,LIU Kangjun,LI Jing,ZHAO Bianhong,ZHANG Chaofeng,LI Ruifeng. ;

PDFviewed：abstract

Pt@SOD with Different n(Si)∶n(Al) Ratio as Catalyst in the Direct Synthesis of Hydrogen Peroxide

Pt(NH3) 4Cl2 was added as precursor of Pt in thein-situ synthesis of sodalite with different n (Si)∶n (Al) ratio to preparedifferent n(Si)∶n(Al) ratio of samples with good Pt encapsulation.The Pt@SODsamples were characterized by XPS,EDS and so on as having good Pt encapsulatingeffect,with trace amount of Pt on sodalite surface.The Pt@SOD series wasfurther used in the direct synthesis of hydrogen peroxide (DSHP) from hydrogenand oxygen reaction to prevent the side reaction of H 2O formation,whic...

Taiyuan University of technology 2019,50(01): XUE Da,SONG Guoqiang,LI Fuxiang,XUE Jianwei,LYU Zhiping. ;

PDFviewed：abstract

The Effect of Ca^2+ and Mg^2+ on the Denitrifying Degradation Properties of Quinoline

In batch cultures,the effect of Ca^2+ and Mg^2+on the denitrifying degradation properties of quinoline was investigated.Theresults show that Ca^2+ and Mg^2+ significantly promoted the denitrificationdegradation of quinoline and the optimum Ca^2+ and Mg^2+ concentration was 100mg/L.The promotion effect was obvious at low concentrations and decreased athigh concentrations.Ca^2+ and Mg^2+ significantly promoted the conversion ofNO3^--N,and the conversion rate was higher when the concentration was 7~...

Taiyuan University of technology 2019,50(01): MAO Huan,WANG Guoying,WANG Jiewei. ;

PDFviewed：abstract

The Investigation of the Corrosion Behavior of Mg-In Alloys in NaCl Solution

The effect of In element on the corrosionbehavior of Mg-In alloys was investigated.The preparation of Mg-In alloys wastraditional casting.The corrosion resistance was evaluated by electrochemicaland immersion tests,X-ray diffraction (XRD),scanning electron microscopy(SEM),Energy dispersive spectrometry (EDS) and X-ray photoelectronspectroscopy.From XRD analysis,In element was in complete solid solution intopure Mg.Experimental results from polarization,weight loss,and SEMobservation.Show that of ...

Taiyuan University of technology 2019,50(01): LIU Xiaoda,MAO Yukun,HOU Lifeng,YIN Ming,YU Xu,LI Xu,WEI Yinghui. ;

PDFviewed：abstract

Application of NDVI Time-series Generation Technique Based on Spatial-temporal Fusion in Winter Whea

Normalized difference vegetation index(NDVI)withhigh spatial and temporal resolution is of great significance for dynamicmonitoring of winter wheat,however,Gaofen-1 satellite can not get time-seriesdata.With the aim to solve this problem,northeast Henan province was taken asthe experimental area,the GF-1/WFV and MODIS surface reflectance productMOD09Q1 data of 5 different phenological periods of winter wheat were analyzedby STARFM spatial-temporal algorithm.The 5 different phenological periodsinc...

Taiyuan University of technology 2019,50(01): LI Shenglin,LI Dacheng,HAN Qijin,LONG Xiaoxiang. ;

PDFviewed：abstract

Research on the Regionalization and Prediction Model of Vegetation Status

In this study,the source-sink landscape theoryand the minimum cumulative resistance (MCR) model were applied to evaluatevegetation status and regional division in Qinshui County on the basis ofLandsat Operational Land Imager data acquired in 2016,and targeted partitioncontrols were put forward on the basis of the regionalization results.Then,apixel trend extrapolation model was introduced and applied to simulate statusof vegetation in 2016,which was compared with the results created by dimidiatep...

Taiyuan University of technology 2019,50(01): BAI Jinjin,XU Mingde,BAI Bo,ZHAO Wenjiang,ZHANG Yueting. ;

PDFviewed：abstract

Discrete Element Numerical Simulation of Powder Particles Triboelectric Charging

Particles are charged owing to contact,frictionand impact in the process of industrial powder material treatment.Electrostaticseparation is based on the process of friction charging to achieve physicalseparation of different particles,and the enhancement of particle frictionalelectrification is the main way to improve separation efficiency.In thispaper,three-dimensional model of tribocharger and geometric model of particleswere established.The mechanical model of the solution is determined by stu...

Taiyuan University of technology 2019,50(01): SUN Meng,LI Haisheng,CHEN Yinghua,CHEN Ming,ZHANG Xinxi. ;

PDFviewed：abstract

Research on Energy Storage System of Bidirectional DC/DC Converter for Electric Hydraulic Excavator

In order to improve the energy utilization rateof electric hydraulic excavator and reduce the fluctuation of power supply,thispaper focuses on the power system of variable speed electric hydraulicexcavator using non-isolated bidirectional DC/DC converter and super capacitorgroup.In SimulationX,the model of half-bridge converter and supercapacitorenergy storage system based on equivalent resistance was established by usingfull ripple modeling method.The parameters of each component and its control...

Taiyuan University of technology 2019,50(01): LIU Xuecheng,CHENG Hang,HAO Yunxiao,CHEN Zhengxiong,QUAN Long. ;

PDFviewed：abstract

Multi-sample Reverse Design of Handle Shape

It is of great significance to improve workingefficiency,reduce fatigue and illness by matching handle shape to usershand.In order to meet users comfort requirements and obtain a handle shapewith a larger range of human body adaptation,a multi-sample reverse designmethod based on key points was proposed.By collecting the key points coordinatedata for multiple target samples,the method takes the optimal percentile as thefinal data to model reconstruction,design and manufacture.Under the guidance o...

Taiyuan University of technology 2019,50(01): ZHAO Jing,SUN Huanwu,BIAN Xuanyi. ;

PDFviewed：abstract

Emotion Recognition Based on Deep Belief Network

Aiming at the feature extraction problem inspeech emotion recognition,the hierarchical deep belief network (DBN) was usedto extract the emotion characteristics of speech signal automatically,and thecontinuous multi frame speech was combined together to form a high- dimensionalabstract feature.The feature trained by deep belief network was used as theinput of the limit learning machine (ELM) classifier,and finally a speechemotion recognition system was established.The experimental results in CASIA...

Taiyuan University of technology 2019,50(01): ZHANG Li,LYU Jun,QIANG Yan,LIU Jihua. ;

PDFviewed：abstract

Acoustic and Kinematic Analyses of Vowels Produced by Speakers with Hearing Impairment

Acoustic and kinematic data for vowels of/a/,/i/,/u/,/o/,/e/,// were collected using 3D EMA.Our study explored thepossible relationship between formant,duration,maximum displacement andvelocity of lip and tongue.For acoustic parameters,the results show that themean value of F1 on vowels /i/ and /e/,the mean value of F2 on all vowels,andduration on all vowels were significantly different between participants withhearing impairment and normal person (P<0.05).For kinematic parameters,theresults s...

Taiyuan University of technology 2019,50(01): XUE Peiyun,ZHANG Xueying. ;

PDFviewed：abstract

Intelligent Power Management System Based on WiFi Interaction

In this paper,an intelligent power managementsystem based on WiFi interaction was studied,which can automatically judgewhether there is anyone in the room and intelligently control different powersockets according to the scene.The system consists of wireless routers HonorCube,custom-designed power sockets and mobile phones without additionalapps.Wireless router is the monitoring and control center of the wholesystem.Through third-party apps,it can monitor WiFi connection state of cellphone in rea...

Taiyuan University of technology 2019,50(01): LI Xin,XU Chengwu,ZHANG Jianguo,CHENG Peng. ;

PDFviewed：abstract

Experimental Study and Finite Element Analysis on Stress Concentration of the Weld Toe of Tube in We

In this study,the stress concentrationcharacteristics of the weld toe of tube in joints were studied by conductingexperiments and finite element analysis.The results show that the vertical stress,radialstress and hoop stress on the weld toe of tube were all tensile stress.Thevertical stress was the highest one,the hoop one was about half of the verticalone,the radial one is the lowest.The hot spot stress of the weld toe of tubeincreased with increase of outer diameter of hollow sphere and thickne...

Taiyuan University of technology 2019,50(01): ZHANG Jianli,LEI Honggang. ;

PDFviewed：abstract

Computational Experiments on Frictional Head Loss in Labyrinth Channel

The main head loss in labyrinth channel is localhead loss,which is caused by its structural characteristics.However,there is noconsensus on the proportion of total head loss that frictional head lossaccounts for up to now.In order to analyze the proportion of total head loss inLabyrinth Channel,which the frictional head loss accounts for,the frictionalhead loss in trapezoidal and dental shape labyrinth channel was analyzed byphysical model test.The results show that the frictional head loss accou...

Taiyuan University of technology 2019,50(01): WANG Chao,LI Zhiqin,XU Teng,KANG Miaoye,SONG Xiaoye. ;

PDFviewed：abstract