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Interface damage mechanism of rubber cord composite material
Xiaohui Guo,Xiaojing Yuan,Guangyong Liu,Hefang Qiu,Fanfan Cui 한양대학교 청정에너지연구소 2023 Journal of Ceramic Processing Research Vol.24 No.1
In order to study the interface failure mechanism of rubber cord composites laid at symmetrical angles, a representativevolume element was established by the finite element method to simulate the stress distribution at the mesoscopic level ofrubber cord composites. The energy-based power law is used to simulate the damage evolution of the cord-rubber interface. The results show that the interface damage is caused by the torque that the cord bears during the stretching process, and theinterface assumes the role of transmitting torque in this process, so the failure occurred.The initial interface stiffness is a vitalbonding interface parameter that affects the interface damage evolution, and the initial stiffness is positively correlated withthe interface damage evolution variable. The increase in the included angle of the cord will cause the torque on the cord toincrease, resulting in aggravated interface failure.
Study of Credibility Evaluation of Dynamic Models and their Parameters
Guo, Weimin,Ye, Xiaohui,Zhong, Wuzhi,Su, Yi,Tang, Yaohua,Song, Xinli,Liu, Tao The Korean Institute of Electrical Engineers 2014 The Journal of International Council on Electrical Vol.4 No.1
The time-domain simulation plays an important role in planning, designing and operation of the power system, but mismatches between its results and the actual system response show that the credibility evaluation of dynamic models is critical in all the above aspects of power systems. This paper discusses the technologies of credibility evaluation, including hybrid dynamic simulation with PMU measurements, error analysis and the calculated indices. Moreover, a phase shift method is presented to implement hybrid dynamic simulation in PSD-FDS. Then the paper proposes a credibility evaluation scheme to provide solution for the evaluation. At last, one sample is used to validate the implementation of hybrid dynamic simulation, while the other sample illustrates the effectiveness of the credibility evaluation approach.
Jianfeng Gou,Xiaohui Li,Huixuan Zhang,Ruonan Guo,Xiaoyong Deng,Xiuwen Cheng,Mingzheng Xie,Qingfeng Cheng 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.59 No.-
Silver/silver chloride/exfoliated graphite (Ag/AgCl/EG) nano-photocatalyst was synthesized through precipitation and photoreduction processes. Afterwards, physicochemical properties of Ag/AgCl/EG were systematically studied by series of techniques. Results indicated that spherical-like Ag0 and AgCl with a diameter of 18.6 nm were deposited onto the surface of EG, resulting in the large surface area, strong visible absorbance and high charge separation efficiency. In addition, Ag/AgCl/EG exhibited high visible light photocatalytic (PC) activity for degradation of RhB (99.5%) and phenol (89.1%) solution. Also, the enhanced visible light PC mechanism was proposed and confirmed. Furthermore, Ag/AgCl/EG nano-photocatalyst performed good reusability even after six recycles utilization.
The Control and Data Processing of the Multi-mode Microwave Remote Sensor
Maohua, Sun,Xiaohui, Zhang,Wei, Guo 대한원격탐사학회 2001 International Symposium on Remote Sensing Vol.17 No.1
The multi-mode microwave remote sensor consists of altimeter(ALT), scatterometer(SCAT) and radiometer(RAD), it is designed for space platform The data manage and control unit is the center of the instrument. Main function of the unit is producing the scheduling, controlling every mode to finish it's working, collecting data, receiving and executing the commands from space platform or ground, transmitting parameters and science data to the earth. Because the system will be applied on space platform, in order to make it safer, some designs in software and hardware were added in the data manage and control unit.
Yongxia Miao,Xiaohui Liu,Yanglong Guo,Yanqin Wang,Yun Guo,Guanzhong Lu 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.1
The MoO3/SiO2 catalysts containing different surface molybdenum species were prepared by a sol–gel method, and the effects of the preparation condition and MoO3 loading on the surface molybdenum species and property of MoO3/SiO2 were studied. The XRD, FT-IR, UV–vis and Raman spectroscopies were used to characterize the surface molybdenum species, and temperature-programmed desorption of NH3 adsorbed on a catalyst was used to detect the surface acidic properties. The results show that, therewere the dispersed polymolybdate, a-MoO3, b-MoO3, monomeric molybdenum species and silicomolybdic acid on the MoO3/SiO2 catalyst, and their distributions and subsistence states were affected by the preparation condition and MoO3 loading. Different molybdenum species exhibit different catalytic activities for the epoxidation of propylene with cumene hydroperoxide. In the 15 wt% MoO3/SiO2 catalyst synthesized at pH 9.1 and dried appropriately, there are the small size b-MoO3 and monomeric molybdenum species that they are mainly effective catalyst components for the epoxidation of propylene. Using this catalyst, the ~100% conversion of cumene hydroperoxide and ~100% selectivity to propylene oxide can be obtained in the tert-butyl alcohol solvent at 2.6 MPa and 80 8C for 4 h.
Lee, Byung-Chan,Xiaohui Yuan,Huang, Guo-Yuan 아시아건강운동학회 2021 Journal of Asian Society for Health & Exercise Vol.3 No.1
Purpose: This study aims to identify the work-life balance and psychological happiness of screen golf participants and present the direction and role of screen golf as a leisure activity for the post-corona era. Study subjects were 281 screen golfers from Seoul metropolitan area. Methods: For data analysis, SPSS 24.0 program was used with frequency analysis, reliability analysis, correlation analysis and multiple regression analysis. Results: Hypothesis are as follows. First, screen golfer’s work-life balance have affected on psychological satisfaction of happiness. Second, when screen golfer’s they control their work-life balance, the work-family, work-leisure and work-growth balance can increase self-acceptance happiness.
The enhanced electrical transport properties of Fe3+ doped Cu2SnS3
Lei Cao,Xueli Du,Xiaohui Guo,Zhihao Yuan 대한금속·재료학회 2021 ELECTRONIC MATERIALS LETTERS Vol.17 No.6
Cu 2 SnS 3 has attracted much attention as a promising environmental-friendly thermoelectric material. In this work, theFe 3+ doped Cu 2 Sn 1- x Fe x S 3 ( x = 0–0.2) compounds were prepared by a facile route of solvothermal synthesis and microwavesintering. Due to the shallow impurity energy level and additional energy states introduced by the d-unfi lled electrons inthe valence band, Fe 3+ doping eff ectively enhanced the electrical transport properties of Cu 2 SnS 3 , and the ultra-high powerfactor of 1.11 mWK −2 m −1 at 700 K is obtained from Cu 2 Sn 0.85 Fe 0.15 S 3 . Although the smaller grain size and the residualpores of the samples prepared by hydrothermal synthesis and microwave sintering effi ciently inhibited the increase of thelattice thermal conductivity, the improvement of electrical transport leads to the increase of electronic thermal conductivityand total thermal conductivity. Therefore, the fi nal result is not satisfactory, and the maximum ZT value is only 0.63, whichis obtained from Cu 2 Sn 0.85 Fe 0.15 S 3 at 700 K.
RETURN CONTROL OF ELECTRONIC POWER STEERING UNEQUIPPED WITH AN ANGLE SEN
Shaosong Li,Luping Guo,Gaojian Cui,Zhixin Yu,Xiaohui Lu,Guodong Wang 한국자동차공학회 2019 International journal of automotive technology Vol.20 No.2
A steering wheel may not be able to return to the center position due to friction torque in its mechanism. Thus, in this study, a return controller is developed to improve the returnability of an electric power steering vehicle without an angle sensor. The aligning moment is well estimated on the basis of a Kalman filter estimator. A trigger rule is also proposed to switch between assist and return controls. Finally, the compensation current for the return control is regulated in accordance with the aligning moment and vehicle speeds. Simulation and real vehicle results show that the proposed control system can significantly improve the returnability of the steering system.
Comparative Study of the marR Genes within the Family Enterobacteriaceae
Dan Wang,Changjiang Guo,Longjiang Gu,Xiaohui Zhang 한국미생물학회 2014 The journal of microbiology Vol.52 No.6
marR genes are members of an ancient family originallyidentified in Escherichia coli. This family is widely distributedin archaea and bacteria. Homologues of this family have aconserved winged helix fold. MarR proteins are involved innon-specific resistance systems conferring resistance to multipleantibiotics. Extensive studies have shown the importanceof MarR proteins in physiology and pathogenicity inEnterobacteria, but little is known about their origin or evolution. In this study, all the marR genes in 43 enterobacterialgenomes representing 14 genera were identified, and the phylogeneticrelationships and genetic parameters were analyzed. Several major findings were made. Three conserved marRgenes originated earlier than Enterobacteriaceae and a genelossevent was found to have taken place in Yersinia pestisAntiqua. Three functional genes, rovA, hor, and slyA, werefound to be clear orthologs among Enterobacteriaceae. Thecopy number of marR genes in Enterobacteriaceae was foundto vary from 2 to 11. These marR genes exhibited a faster rateof nucleotide substitution than housekeeping genes did. Specifically, the regions of marR domain were found to besubject to strong purifying selection. The phylogenetic relationshipand genetic parameter analyses were consistentwith conservation and specificity of marR genes. These dualcharacters helped MarR to maintain a conserved bindingmotif and variable C-terminus, which are important to adaptiveresponses to a number of external stimuli in Enterobacteriaceae.