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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

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Shanxi Provincial Education Department

Taiyuan University of Technology

location： home> 2021,52(04)

Strengthening Methods of Room and Cryogenic Temperatures Mechanical Properties of Fe45Mn15Cr15Ni25 H

In order to develop cobalt-free low-cost high entropy alloys(HEAs), non equiatomic ratio Fe45Mn15Cr15Ni25 high entropy alloy was designed and prepared through thermodynamic parameters and phase diagram calculation, cold rolling and annealing processes, and the mechanical properties at ambient (293 K) and cryogenic temperatures (77 K) were analyzed. The results show that the single-phase face-centered cubic (FCC) high entropy alloy has excellent mechanical properties at room temperature and cryoge...

Taiyuan University of technology 2021,52(04): LIU Dan ,QIAO Junwei. ;

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Strengthening Methods of Room and Cryogenic Temperatures Mechanical Properties of Fe45Mn15Cr15Ni25 H

Taiyuan University of technology 2021,52(04): LIU Dan, QIAO Junwei. ;

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Robust Ni/ZrO2 Catalysts for Highly Efficient and Stable CO Methanation:Effect of Interwoven Structu

The design of Ni catalysts with anti-sintering and anti-coking properties remains challenging for CO methanation. The confinement of Ni nanoparticles by support is an effective method to achieve high activity and stability during the reaction. A series of Ni/ZrO2 catalysts with interwoven structure were designed and prepared by using Ni/UiO-66 composite as precursor after calcination and H2 reduction. The three-dimensional structures stabilize Ni nanoparticles and the voids in the interwoven stru...

Taiyuan University of technology 2021,52(04): WANG Qianqian, NING Yani ,HU Tong, QIU Li ,YU Feng ,YAN Xiaoliang, LI Ruifeng. ;

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Research Progress of Converged Optical and Wireless Access Network and Its Key Technologies in 5G

With the development of Fifth-generation (5G) mobile communication, mobile networks are dedicated to accommodating more subscribers and diversified service scenarios. 5G is then expected to significantly enhance the quality of experience on services, and pave way for the interconnection of everything. Starting from the development trends of radio accoss network (RAN), this paper investigates its evolution progress and key technologies, including wireless access, optical bearing, interfaces for fr...

Taiyuan University of technology 2021,52(04): GU Zhiqun, XIAO Yuming, ZHANG Jiawei ,JI Yuefeng. ;

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Study on the Mechanism of Rockburst Induced by Tidal Force

According to the statistical analysis of the time and region of rockburst, it is found that the time and region of rockburst have a certain correlation with the change of tidal force. In order to explore this correlation, the mechanism of rock burst induced by tidal force was investigated. On the basis of the mechanical model of rockburst, the mechanism of rockburst induced by tidal force was discussed by using the method of Coulomb Mohr criterion, and the rockburst induced by tidal force was ana...

Taiyuan University of technology 2021,52(04): GUO Gaochuan ,YANG Yongkang. ;

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Numerical Simulation of the Shear Mechanical Behavior of Rock Discontinuity During Direct Shear Test

In this paper, the shear mechanical behavior of rock discontinuity during direct shear test was studied by using Particle Flow Code. The feasibility of bond-debonding method and smooth-joint contact method to simulate the shear mechanical behavior of planar discontinuity was analyzed. The random distribution of particle size and position introduces some micro-roughness, which causes the non-actual stress concentration during the shear process using bond-debonding method. Particles on both sides o...

Taiyuan University of technology 2021,52(04): YANG Zejin, ZHANG Changsuo ,WANG Chenlong. ;

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A Method for Extracting Texture Features of Landslide in High Resolution Remote Sensing Images

High resolution remote sensing images play an important role in landslide recognition. In order to solve the problems of diverse data, complex algorithms, redundant features, and insufficient research on the specific texture characteristics of a single landslide, Gabor filtering was used for texture feature extraction and fusion of spectral features using Support Vector Machine to achieve landslide extraction. First, multi-scale and multi-direction Gabor transformation is carried out on the lands...

Taiyuan University of technology 2021,52(04): WANG Qingya, ZHANG Jin. ;

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Study on the Properties of Malan Loess in Lyuliang Area Under Freeze-thaw Cycles

Little research has been mode on freezing and thawing landslides in Shanxi, a typical seasonally frozen soil area, but landslides caused by freezing and thawing every year are frequent. Therefore, in this paper the undisturbed Malan loess in Lyuliang area of Shanxi Province was taken as the research object. Through the static triaxial shear test and microstructure test under different initial water content and different freeze-thaw cycles on the Q3 loess in this area, the effects of freeze-thaw o...

Taiyuan University of technology 2021,52(04): ZHANG Lingling, LONG Jianhui ,XING Xianli ,GUO Xiaojuan. ;

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Microstructure Control and Anti-counterfeiting Application of Bonded Terbium Polymer PMNTb Fluoresce

Fluorescent fibers were constructed from self-made bonded terbium polymer by electrospinning.The microstructure of the fibers was tuned and the luminescent properties were investigated by adjusting the properties of polymer solution such as solvent system and conductivity. The surface of the fibers is smooth, the diameter is the smallest, and the luminescent property is the best when V(DCE)∶V(DMF)=1∶2. When tetrabutyl ammonium chloride is added, the conductivity of the solution increases, the f...

Taiyuan University of technology 2021,52(04): ZHANG Aiqin ,WANG Yongchao, WANG Zhi ,WANG Hua, JIA Husheng , XU Bingshe. ;

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Effect of Physical and Chemical Structure of Shengli Lignite on Its Spontaneous Combustion Tendency

A series of oxidized coal samples were prepared by oxidation of Shengli lignite in air at 140 ℃ and 160 ℃ for different time. The functional groups and pore structure parameters of coal samples were analyzed and tested by Fourier transform infrared spectroscopy and nitrogen adsorption method. The critical ignition temperature of the oxidized coal samples was measured by the basket heat method. The spontaneous combustion kinetic parameters were calculated, and the influence of lignite physical a...

Taiyuan University of technology 2021,52(04): GAO Lin, MO Qiong, LIAO Junjie, CHANG Liping, BAO Weiren. ;

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The Preparation and Photocatalytic Performance of Bi12O15Cl6/g-C3N4 Heterojunction

Bi12O15Cl6/g-C3N4 binary type Ⅱ heterojunction photocatalyst was prepared by wet impregnation method. The crystal structure, morphology, and optical absorption of the samples were characterized by XRD, SEM, and UV-vis diffuse reflectance spectroscopy. With tetracycline as the target pollutant, the effects of doping ratio, dosage, and initial solution concentration on the photocatalytic degradation of Bi12O15Cl6/g-C3N4 were investigated under visible light. The results show that the removal rate ...

Taiyuan University of technology 2021,52(04): HUO Haohao, LI Yuzhen, WANG Xiaoshuang ,WANG Shaojie, LI Xin, TAN Siyang, Yi Siyuan. ;

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High Performance SERS Substrate Based on PMMA Nanofiber Forest Structure

To meet the needs of low-cost and easy-to-prepare surface enhanced Raman scattering (SERS) substrate in practical application, plasma technology was used to treat poly(methyl methacrylate) (PMMA) to form nanofiber structures on the surface, and combined with metal sputtering process, to prepare SERS substrate. On the basis of the theoretical analysis of the formation mechanism of PMMA nanofibers, rhodamine 6G (R6G) was used as the probe molecule to investigate the SERS performance of the substrat...

Taiyuan University of technology 2021,52(04): LI Ruirui, YANG Shuai ,MAO Haiyang ,CHEN Dapeng , XIONG Jijun. ;

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An Improved Low Delay Distributed Consensus Algorithm in WAN

In order to solve the problem that the number of Quorum nodes in two-phase of WAN distributed consensus algorithm is large and the location relationship between leader and client is ignored, a Paxos variant algorithm—Smallest Quorum Paxos(SQPaxos)—was proposed. In terms of quorums, SQPaxos determines the minimum number of nodes in the first phase Quorums and second phase Quorums, establishes the mapping relationship between proposal number and node number, and allocates nodes for each proposal ...

Taiyuan University of technology 2021,52(04): GONG Ting , NIU Baoning, ZHANG Xuhao. ;

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A Deep Learning Knowledge Tracing Model Based on Attention Mechanism

In this paper we proposed a knowledge tracing method based on Transformer structure, improved the embedded representation of interactive records, designed a gate unit suitable for this model, and optimized the input processing of self-attention sublayer to improve the predictive performance of deep knowledge tracing model. The experimental results on four commonly used public data sets show that compared with previous methods, the model proposed in this paper can better reflect learners’ mastery...

Taiyuan University of technology 2021,52(04): ZHOU Kai ,QIANG Yan, WANG Jiawen, WANG Mengnan. ;

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Aerodynamic Layout Evaluation of Hydrogen-powered Fixed-wing Unmanned Aerial Vehicle(UAV) by Numeric

For the aerodynamic layout selection of a long-endurance hydrogen energy hybrid unmanned aerial vehicle(UAV), this paper carried out a numerical simulation of aerodynamic characteristics for a certain design plan, in order to provide data support for the aerodynamic layout design evaluation and modification work. In the study, the aerodynamic data at 11 angles of attack (-6~14) were analyzed, the results of two turbulence calculation models were compared, and the respective lift-drag characterist...

Taiyuan University of technology 2021,52(04): TIAN Haiping ,SU Jian, XIAO Zeqi , WANG Han, LI Zhiqiang, LEI Jinhui. ;

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Research Progress on the Evaluation of Non-uniform Building Thermal Environment:a Review

Thermal environment assessment of non-uniform buildings has always been a hot issue in thermal comfort research. Different from the premise of classical thermal comfort evaluation, the thermal environment of non-uniform buildings is generally accompanied by the temporal variability of various environmental parameters and the non-uniformity of spatial distribution, which determines that the evaluation method or index is quite different from the classical thermal comfort evaluation method. This pap...

Taiyuan University of technology 2021,52(04): CHENG Yuanda, LIN Chengkai, WANG Haobo ,WEI Jin ,QIN Zhisheng, WU Fan ,YANG Jinming. ;

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Overall Stability Behavior and Design Method of Q460 High Strength Steel Welded I-section Two-span C

In order to investigate the overall stability behavior of Q460 high strength steel welded I-section two-span continuous beam and develop the design method of such beams in codes, a finite element model considering residual stress was established by using ANSYS finite element program, and the model was verified on the basis of experimental data of Q345 steel two-span continuous beam. With the finite element model verified by experiment, the overall stability behaviors were investigated by changing...

Taiyuan University of technology 2021,52(04): ZHAO Jinyou , YANG Jiqiang , Wei Junming , WEI Na. ;

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Quantitative Research on Historic City Landscape Value Assessment Based on AHP-GIS ——Taking Taiyuan,

The historic urban landscape (HUL) concept is a protection concept proposed for the “continuous” change characteristics and “layered” presentation of cultural landscapes in cities in time series. In this article Taiyuan city was taken as an example, by crawling and sorting the historical relics in Taiyuan, and using the combination of AHP-GIS, to visually identify the historical and cultural landscape space of Taiyuan and quantitatively evaluate the value of historical and cultural landscapes...

Taiyuan University of technology 2021,52(04): LEI Zexin ,LUO Junjie, CAO Lei. ;

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Research on the Spatial Distribution and Settlement Characteristics of Traditional Villages in Shanx

Five hundred and fifty traditional villages in Shanxi Province were studied with ArcGIS 10.2 tools, using the combination of quantitative and qualitative methods such as average nearest neighbor index, kernel density estimation, and buffer analysis. The spatial distribution characteristics and settlement characteristics of traditional villages in Shanxi Province were studied from the perspective of watershed. The results show that: The spatial distribution types of ancient villages in Shanxi Prov...

Taiyuan University of technology 2021,52(04): MA Yu, WANG Jinping, AN Jiaxin. ;

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Test Methods and Trends of Driving Fatigue Risk Assessment

Driving fatigue is one of the main causes of traffic accidents and occupational diseases. Owing to the uncertainty of fatigue itself, there are always great difficulties in the fatigue test of driving operation. On the basis of the current research status of driving fatigue evaluation and test methods,the future trend was analyzed and prospected. By searching keywords and reading and sorting relevant literature, the current driving fatigue evaluation test methods used in transportation vehicles a...

Taiyuan University of technology 2021,52(04): FAN Qinhong ,JIANG Xingchen , YANG Gangjun ,TIAN Baozhen, WU Xueliang, NIE Min. ;

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