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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(03)

Experimental Study on the Law of Sandstone Fracture and Strength Damage Under Disturbance of Excavat

Numerical simulation and laboratory experiments were combined to study the fine sandstone in the return airway of Ximing Mine. The stress loading and unloading path of the surrounding rock during the excavation process in the roadway was restored by using FLAC(3 D) refined simulation. On the basis of this, the acoustic emission detector was used to obtain two acoustic emission signal distribution characteristics of the breakage process of sandstone specimens under uniaxial compression with and wi...

Taiyuan University of technology 2021,52(03): LI Zhu FENG Guorui CUI Jiaqing. ;

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Deformation Characteristics and Mechanical Mechanism of Collapse Accumulation Body After Coal Mine D

After the occurrence of coal mine disaster, roadway collapse and accumulation often block the roadway and the rescue route. Under this condition, it is particularly difficult to excavate the rescue channel. In order to study the movement and deformation characteristics of the accumulation body and the mechanical mechanism between the accumulation body and the rescue channel in the process of rescue tunnel excavation, on the basis of expounding the arch effect, collapse phenomenon and self-organiz...

Taiyuan University of technology 2021,52(03): CHEN Guangbo LI Tan CHEN Shijiang DONG Hongjuan ZHANG Guohua TENG Pengcheng. ;

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Study on Dynamic Prediction of Mining Subsidence with Segmented Weibull Time Function

The maximum subsidence speed moment τ of the surface point was set as cut-off point to divide the dynamic subsidence process into two phases of approximate symmetry. By combining it with deviation correction and growth function model to eliminate the oretical error, a segmented Weibull function was proposed, the regression equation of τ and the distance x between the surface point and the open hole was established, and the determination method of lithologic parameters c and k was discussed, whi...

Taiyuan University of technology 2021,52(03): ZHANG Yongsheng HU Haifeng CAI Yinfei HE Fushuai. ;

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Study on the Effect and Mechanism of Original Moisture on Coal Spontaneous Combustion

Lignite coal samples with different water contents were prepared by drying lignite raw coal. The process of coal spontaneous combustion was simulated in a temperature programmed oxidation device. The change of active functional groups of oxidized coal samples in the process of coal spontaneous combustion was measured by in-situ Fourier transform infrared spectrometry. At the same time, the change law of microscopic specific surface area and mass in the process of coal spontaneous combustion was c...

Taiyuan University of technology 2021,52(03): LIU Xiaoyuan ZHANG Yulong ZHANG Xiaoyu WANG Junfeng ZHOU Chunshan. ;

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Study on Stress and Strain Characteristics of Corners of Reinforced Earth Retaining Wall

In order to explore the stress and strain characteristics around the corner of reinforced earth retaining wall, a certain engineering example was selected as a study case, and a 3D numerical model was established. After that, the stress-strain characteristics of the corners and the inherent mechanics principle were analyzed. The results show that the corners of the reinforced earth retaining wall are more prone to deformation and damage. The spatial shape of the potential fracture surface at the ...

Taiyuan University of technology 2021,52(03): LONG Jianhui LI Hongqiang SUN Ziqiang GUO Xiaojuan. ;

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Seismic Phase Picking Algorithm Based on Improved Bi-LSTM

In order to solve the problem of traditional waveform detection algorithms such as relying on manual setting of thresholds and low precision of phase picking, a seismic phase picking algorithm based on improved Bi-LSTM was proposed. This method uses filtering, normalization, and noise addition to preprocess the original waveform data, and uses the Bi-LSTM model to perform adaptive deep feature extraction of the seismic signal. Meanwhile, in order to solve the overfitting of the Bi-LSTM model, Spa...

Taiyuan University of technology 2021,52(03): HAN Zhenhua GUO Haoyu LI Yu ZHANG Ling FENG Xiufang. ;

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Preparation of H_xPO_4~((3-x)-) Imprinted Polypyrrole Membrane Material and Its Electrochemically Sw

The polypyrrole-based imprinted membrane material was prepared on gold plated quartz wafer by potentiostatic method. The morphology, structure, and composition of membrane material were characterized by SEM, FT-IR, and XPS. The results show that the surface micromorphology of material was cauliflower-like, and the membrane contained H_2PO~-_4, which had the characteristics of H_2PO~-_4 imprinting. The exchange properties of H_xPO_4~((3-x)-) were investigated by electrochemical method. The results...

Taiyuan University of technology 2021,52(03): XING Lifang YUAN Qinbo CHEN Liang ZHOU Xianxian LI Yu WANG Enzhi LIU Panpan LIU Shibin. ;

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Pollution Characteristic and Source Analysis of Heavy Metals in Atmospheric PM2.5During Heating Seas

In order to study the pollution characteristics and sources of heavy metals in PM2.5 around Taiyuan City during the heating season, atmospheric PM2.5 samples were collected in Taiyuan City and Yuci University Town in January 2018. Plasma mass spectrometry was used to determine 10 heavy metal elements. Enrichment factor method and cluster analysis method were used to clarify their sources. The backward trajectory method was adopted to analyze the influence of air mass migration. The results show t...

Taiyuan University of technology 2021,52(03): WANG Zhilei LIU Xiaofeng ZHANG Shuting BAI Huiling MU Ling LI Xuan. ;

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The Cooperative Effect of Ag and Cu Co-doping on Morphology and Optical Properties of ZnO Nanorods

Zinc oxide(ZnO) has unique physical and optical properties. Proper doping of ZnO plays an important role in adjusting the photoelectric properties of its optoelectronic devices. In this paper, undoped, Ag-or Cu-doped, and Ag+Cu co-doped ZnO nanorod(NRs) arrays were synthesized by hydrothermal method at low temperature. Meanwhile the influence of doping and co-doping on the morphology, structure, and optical properties of ZnO NRs was investigated. The results show that the ZnO NRs prepared under d...

Taiyuan University of technology 2021,52(03): ZHOU Xiaolong YU Chunyan LI Tianbao DONG Hailiang ZHAI Guangmei JIA Wei JIA Zhigang. ;

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Surface Modification and Property of Aluminum Alloy by Introduction of High Entropy Alloy via Fricti

Aluminum-based AlCoCrFeNi high-entropy alloy(HEA) composite was fabricated by rapid cooling under water after applying friction stir processing to modify the surface properties of aluminum. The microstructure was characterized by using SEM and EBSD. The microhardness and tribological properties of composite were analyzed on microhardness tester and friction and wear equipment, and wear mechanism was discussed. The results show that the HEA particles are uniformly distributed in the Al matrix with...

Taiyuan University of technology 2021,52(03): CHENG Buyun ZHANG Hongxia YANG Xiao YAN Zhifeng. ;

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Wind Tunnel Simulation Study of Flow and Diffusion Around a Building Under Neutral and Stable Therma

The flow and diffusion around a building under neutral(Rib=0) and stable stratification(Rib=0.057) conditions were investigated by wind tunnel experiment. The mean flow and turbulent structure around the building were measured by a combination of hot wire and cold wire. The characteristics of pollutant concentration distribution under neutral and stable stratification conditions were investigated by using tracer experiments. The results indicate that when atmospheric stratification is stable, the...

Taiyuan University of technology 2021,52(03): LI Yunpeng ZHANG Junfang LI Ruojie LI Yu YAO Rentai. ;

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Segmentation and Detection of Liver Tumor in Non-contrast MRI Image Combined with Multi-modality Fea

Aiming at the problem of the ambiguity and specificity of the tumor information on the non-contrast image, this paper proposes the use of multi-modality non-contrast MRI image information to complete the segmentation and detection of liver tumors. First, the multi-scale feature extraction block(MsFEB) extracts deep semantic features for tumors of different modalities. The network further fuses the features to obtain a multi-modal fusion feature with characterization ability. Second, the segmentat...

Taiyuan University of technology 2021,52(03): XIAO Xiaojiao ZHAO Wenting ZHAO Juanjuan XIAO Ning YANG Xingyu YANG Xiaotang. ;

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Quality Analysis of Polysilicon Ingot Batching Using NRS-SVM Two-stage Genetic Algorithm

In the quality analysis of polysilicon ingot batching, a two-stage genetic algorithm(NRS-SVM-GA) combining the NRS-SVM model with genetic algorithm(GA) was proposed to solve the problem of neighborhood radius and SVM parameter values in the processing of continuous data of polysilicon ingot batting with rough set-support vector machine(NRS-SVM) model. The first stage of the algorithm, by searching for a new neighborhood radius, a better reduction set is obtained. In the second stage the attribute...

Taiyuan University of technology 2021,52(03): XU Jinglin HUANG Lixia ZHANG Xueying LI Fenglian DU Haiwen YU Lijun MA Xiu. ;

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A Study on the Classification of Schizophrenia Based on Single Gray Matter Networks

In order to study the covariance of subtle differences in gray matter in schizophrenic patients, single subject brain network model was constructed by using voxel similarity index. The gray matter was divided into fixed size cubes, the single subject gray matter covariant network was constructed by means of Pearson correlation between voxels, and the network was mode sparse by empirical null model method and finally normalized to a 9090 gray matter covariant network. The results show that the top...

Taiyuan University of technology 2021,52(03): MA Yunxiao LIANG Jiarui ZHANG Nan SUN Jie WANG Bin. ;

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NOxEmission Prediction of Coal Fired Utility Boiler Based on FAR-HK-ELM

A prediction method for NOx emission of coal-fired utility boiler based on FAR-HK-ELM was proposed by combining the Fast Attribute Reduction(FAR) and Hybrid Kernel Extreme Learning Machine(HK-ELM) algorithms. First, the main influencing attributes of NOx emission are selected by FAR algorithm, and the redundant information of high-dimensional characteristics is eliminated; Then, HK-ELM based on global polynomial kernel and local gaussian radial basis function is constructed to model NOx emission,...

Taiyuan University of technology 2021,52(03): FU Wenhua XIE Jun REN Mifeng XU Xinying YAN Gaowei. ;

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Inertia Compensation Strategy of AC/DC System Tie Line Based on Energy Storage Differential Control

A strategy of compensating DC tie line inertia by differential control of energy storage was proposed in this paper. First, through the analysis of AC/DC transmission model and the inertia characteristics of DC tie line, a two zone AC/DC hybrid AGC system model considering inertia compensation was constructed. Then, energy storage output control was proposed to change the transmission power of DC tie line to form the inertia performance of tie line power change. On this basis, aiming at the negat...

Taiyuan University of technology 2021,52(03): ZHAO Xilin ZHANG Daheng MING Hang. ;

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Research on Strut-and-Tie Models of Beam-Column Connections by Topology Optimization based on Moving

It is of great theoretical and practical significance to study the strut-and-tie models of beam-column connections. In this paper, an explicit topology optimization based on moving morphable components was used to analyze the strut-and-tie models, which overcomes the shortcomings of traditional implicit topology optimization. In this method, the problem of generating a suitable strut-and-tie model is transformed into an optimization problem with minimum compliance under volume constraints. The op...

Taiyuan University of technology 2021,52(03): QIAO Wenzheng CHEN Guorong LU Guoyun. ;

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Experimental Study on the Synorgistic Solidification of High-Concentration Copper Contaminated Soil

In this paper, high-concentration copper contaminated soil was solidified by cement and industrial waste residues including red mud, carbide slag, and phosphogypsum. Through unconfined compressive strength test, toxic characteristic leaching procedure test, and electrical resistivity test, the effects of mixing ratio and content of curing agent, and curing time on the solidification were investigated. The results show that the three kinds of industrial waste residues well solidify high-concentrat...

Taiyuan University of technology 2021,52(03): QIAO Wenzheng CHEN Guorong LU Guoyun. ;

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Inelastic Displacement Ratio Approach for Analyzing the Vertical Elasto-plastic Seismic Responses of

The inelastic deformation of a steel beam bridge under vertical seismic actions would accumulate in the “downward” side, whereas in the “upward” side, the structure keeps elastic. An un-symmetric hysteretic model was established for the steel beam bridge subjected to vertical earthquake actions. By using 53 strong vertical earthquake records and a developed nonlinear dynamic analyzing code, the inelastic displacement demand of steel beam bridges under vertical seismic actions were computed. F...

Taiyuan University of technology 2021,52(03): YIN Jian. ;

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Nonlinear Variable Parameter Time History Analysis on Dynamic Response of Timber Frame in Song Dynas

In order to study the dynamic response of timber frame in Song Dynasty palace under horizontal acceleration, a series of nonlinear time-history analysis FE models were estallihed. The parameter analysis of the timber frame in Song Dynasty palace by peak horizontal acceleration and column bottom friction coefficient was conducted. The results show that there are four dynamic responses of the timber frame in Song Dynasty palace: rest, slide, pure-rocking, and slide-rocking. The overall slide of the...

Taiyuan University of technology 2021,52(03): WAN Jia GUO Renfu MI Xiaochen WEI Jianwei LI Tieying. ;

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