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MPC-based Torque Distribution for Planar Motion of Four-wheel Independently Driven Electric Vehicles:Considering Motor Models and Iron Losses

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CES Transactions on Electrical Machines and Systems 2023年第1期7卷 45-53页

作者： Yiyan su Deliang liang Peng Kou the State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical EngineeringXi'an Jiaotong UniversityXi’an710049China IEEE

The most critical obstacle for four-wheel independently driven electric vehicles(4WID-EVs)is the driving *** the actuators of 4WID-EVs,motors account for its major power *** this sense,by properly distributing torques to minimize the power consumption,the driving range of 4WID-EV can be effectively *** paper proposes a model predictive control(MPC)-based torque distribution scheme,which minimizes the power consumption of 4WID-EVs while guaranteeing its tracking performance of planar *** incorporating the motor model considering iron losses,the optimal torque distribution can be achieved without an additional torque ***,for this reason,the proposed control scheme is computationally efficient,since the power consumption term to be optimized,which is expressed as the product of the motor voltages and currents,is much simpler than that derived from the efficiency *** reasonable simplification and linearization,the MPC problem is converted to a quadratic programming problem,which can be solved *** simulation results in MATLAB and CarSim co-simulation environments demonstrate that the proposed scheme effectively reduces power consumption with guaranteed tracking performance.

关键词： four-wheel independently driven electric vehicles Model predictive control Motor models Iron losses

Progress in the basic and clinical research on the Schlemm’s canal

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International Journal of Ophthalmology(English edition) 2020年第5期13卷 816-821页

作者： Le-Ying Wang Guan-yu su Zhen-yu Wei Zi-Jun Zhang Qing-Feng liang Beijing Institute of Ophthalmology Beijing Tongren Eye CenterBeijing Tongren HospitalCapital Medical UniversityBeijing Key Laboratory of Ophthalmology and Visual SciencesBeijing 100005China

Glaucoma is a leading cause of irreversible blindness in the *** pressure(IOP)plays a key role in glaucoma development and ***’s canal(SC),an important structure of the anterior chamber angle,regulates the flow of aqueous humor and maintains *** of its special function of aqueous outflow,the SC has been intensive investigated *** characteristics of SC in anatomy,physiology and pathophysiology have been *** to normal,glaucomatous SC cells are more sensitive to substrate stiffness,have higher stiffness and and lower porosity leading to higher outflow *** SC collapse caused by acute IOP increase is partially or totally *** advanced inspection techniques,high-quality images of the SC can be obtained in vivo,which facilitates SC quantitative measurements clinically and allows us to investigate a new therapy paradigm for *** this review,we summarize the basic and clinical research that focused on mechanisms of aqueous outflow resistance and SC changes in physiological,pathological,and posttreatment states.

关键词： Schlemm's canal physiology pathophysiology glaucoma progress

Development of seismic fragility curves for low-rise masonry infilled reinforced concrete buildings by a coefficient-based method

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Earthquake Engineering and Engineering Vibration 2013年第2期12卷 319-332页

作者： Ray Kai Leung su Chien-liang Lee Department of Civil Engineering The University of Hong Kong

This study presents a seismic fragility analysis and ultimate spectral displacement assessment of regular low-rise masonry infilled （MI） reinforced concrete （RC） buildings using a coefficient-based method. The coefficient-based method does not require a complicated finite element analysis; instead, it is a simplifed procedure for assessing the spectral acceleration and displacement of buildings subjected to earthquakes. A regression analysis was first performed to obtain the best-fitting equations for the inter-story drift ratio （IDR） and period shift factor of low-rise MI RC buildings in response to the peak ground acceleration of earthquakes using published results obtained from shaking table tests. Both spectral acceleration- and spectral displacement-based fragility curves under various damage states （in terms of IDR） were then constructed using the coefficient-based method. Finally, the spectral displacements of low-rise MI RC buildings at the ultimate （or near- collapse） state obtained from this paper and the literature were compared. The simulation results indicate that the fragility curves obtained from this study and other previous work correspond well. Furthermore, most of the spectral displacements of low-rise MI RC buildings at the ultimate state from the literature fall within the bounded spectral displacements predicted by the coefficient-based method.

关键词： seismic fragility analysis masonry spectral displacement

Effect of pouring time on microstructure and mechanical properties of centrifugal cast Ti-46Al alloy tubes

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China Foundry 2025年

作者： Gang Huang Qian Dang Cong-cong su Jing Zhao Chi Zhang Guo-huai Liu Zhao-dong Wang The State Key Laboratory of Rolling and Automation Northeastern University School of Materials Science and Engineering Shenyang University of Technology

The grain size of TiAl alloy castings prepared by traditional casting process is coarse, thus showing poor mechanical properties. In this study, a new type of high performance Ti-46Al alloy tube prepared by vacuum centrifugal casting technology was introduced. This research comprehensively examined the influence of pouring time on the microstructure and mechanical performance of the castings, employing both experimental approaches and ProCast simulation methodologies. The findings indicate that prolonging the pouring time facilitates a microstructural evolution from coarse columnar grains to refined equiaxed grains. Under the condition of pouring temperature of 1,600 °C, rotation speed of 800 r·min-1and pouring time of 6 s, the tensile strength of Ti-46Al alloy at room temperature reaches 650 MPa, and the tensile strength at 800 °C reaches 705 MPa, which is significantly higher than that of traditional as-cast Ti-Al alloy.

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Mechanism of Cross-modal Information Influencing Taste

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Current Medical Science 2020年第3期40卷 474-479页

作者： Pei liang Jia-yu JIANG Qiang LIU su-lin ZHANG Hua-jing YANG Department of Psychology Faculty of EducationHubei UniversityWuhan430062China Brain and Cognition Research Center Faculty of EducationHubei UniversityWuhan430062China Research Center of Brain and Cognitive Neuroscience Liaoning Normal UniversityDalian116029China Department of Otorhinolaryngology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China Department of Ophthalmology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China

Studies on the integration of cross-modal information with taste perception has been mostly limited to uni-modal *** cross-modal sensory interaction and the neural network of information processing and its control were not fully explored and the mechanisms remain poorly *** mini review investigated the impact of uni-modal and multi-modal information on the taste perception,from the perspective of cognitive status,such as emotion,expectation and attention,and discussed the hypothesis that the cognitive status is the key step for visual sense to exert influence on *** work may help researchers better understand the mechanism of cross-modal information processing and further develop neutrally-based artificial intelligent(AI)system.

关键词： cross-modal information integration cognitive status taste perception

Microstructures and properties of Nb-Si-based alloys with B addition

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Rare Metals 2023年第8期42卷 2801-2808页

作者： liang-Shun Luo Fu-Xin Wang Xian-yu Meng Yan-Jin Xu liang Wang Yan-Qing su Jing-Jie Guo Heng-Zhi Fu School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China AVIC Manufacturing Technology Institute Beijing 100024China

The Nb-16Si-18Ti-xB(at%,similarly hereinafter,x=0,1,2,3)alloys were prepared by arc melting in a water-cooled copper *** influences of B addition on their microstructures and properties were based on the data of X-ray diffraction(XRD),field emission scanning electron microscopy(FESEM),and electronic universal material testing *** is found that the addition of B promotes the formation ofα-Nb5Si3phase and suppresses the formation of Nb3Si phase.B addition also tends Nb-16Si-18Ti alloy to form the hypereutectic *** content of silicide phases shows a trend of firstly decreasing and then increasing in Nb-16Si-18Ti-xB(x=0,1,2,3)*** size of Nb solid solution(Nbss)phase increases in Nb-16Si-18Ti-xB(x=0,1,2,3)alloys after heat treatment at 1523 K for 10 *** room temperature compression strength of Nb-16Si-18Ti alloy increases firstly and then decreases with B *** high-temperature compression strength of Nb-16Si-18Ti alloy decreases firstly and then increases with B *** is found that the volume and size of silicide phases have a synergistic effect on the compression strength of Nb-TiSi-based alloys.

关键词： Nb-Si alloys B element Phase stability Compression yield strength

Puncture Phenomena and Mechanism Analysis of a RTV Coated Cap and Pin Insulators in a Steep-front Impulse Voltage Test

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CSEE Journal of Power and Energy Systems 2021年第4期7卷 832-839页

作者： Tao Deng Xidong liang Zhiyi su Jun Zhou Electrical Engineering Department Tsinghua UniversityBeijing 100084Chinaand also with Department of High VoltageChina Electric Power Research Institute Co.LtdBeijing 100192China Department Tsinghua UniversityBeijing 100084China Department of High Voltage China Electric Power Research Institute Co.LtdBeijing 100192China

In recent years,more than 6 million room temperature vulcanized(RTV)silicone rubber coated cap and pin insulators with high mechanical ratings were used in ultra-high voltage transmission lines in China to improve pollution ***,the unexpected puncture phenomena of RTV coated insulators were exposed during steep-front impulse voltage tests;for instance,the steep-front impulse voltage test pass rate decreased to less than 50% for 550 kN glass insulators with RTV *** steep-front impulse voltage test is the most effective method used to check the insulation quality of cap and pin insulators・This unexpected phenomenon once caused serious concerns to power *** this paper,several possible factors that affect the puncture of insulators were ***,the extent of the decline in the breakdown of the 550 kN glass cap and pin insulators with and without RTV coatings were *** initial puncture location was then found,and the developmental process of the arc on the insulator surface in steep-front impulse voltage tests was observed with an ultra-high-speed intensified charge coupled device ***,a breakdown mechanism is *** puncture phenomena of a RTV coated insulator in a steep-front impulse voltage test is essentially an electrical breakdown of the internal insulation・The RTV coating induces the close adherence of the arc to the surface of the *** closeness changes the arc development path on the insulator surface and facilitates easy breakdown in the shed weak *** these factors result in a significant increase in the breakdown probability of RTV coated insulators in steepfront impulse voltage tests.

关键词： Cap and pin insulator puncture RTV coating steep-front impulse voltage test

Effect of Ti Addition on the Microstructure and Property of FeAlCuCrNiMo0.6 High-Entropy Alloy

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Acta Metallurgica Sinica(English Letters) 2020年第7期33卷 957-967页

作者： yunhai su Xuewei liang yunqi Liu Zhiyong Dai School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China

FeAlCuCrNiMo0.6Tix(x=0.2,0.6,0.8) high-entropy alloys were fabricated with flux-cored wire and surfaced on low-carbon steel by gas metal arc *** effect of Ti addition on the microstructures and properties of FeAlCuCrNiMo0.6Tix HEAs surfacing layer was systematically *** results show that FeAlCuCrNiMo0.6Tix HEAs surfacing layer exhibits a majority of BCC solid solution based on Fe-Cr phase and a small amount of MC *** and wear tests results show that the addition of Ti can significantly improve the microhardness and wear resistance of the surfacing *** microhardness of surfacing layer can reach up to 642 HV0.5,which is about 2.8 times that of the ***,the wear mass loss is *** corrosion test results show that the addition of Ti can improve the corrosion resistance of surfacing layer,which is better than 304 stainless steel *** the increase in Ti,the corrosion resistance increases first and then *** the Ti content is 0.6,the self-corrosion current density of polarization curve is the smallest,the capacitive impedance radius of electrochemical impedance spectroscopy is the largest,and the corrosion resistance effect is the best.

关键词： corrosion resistance wear

Microstructure and mechanical properties of NbZrTi and NbHfZrTi alloys

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Rare Metals 2019年第9期38卷 840-847页

作者： yu-Min Hu Xiao-Dong Liu Na-Na Guo liang Wang Yan-Qing su Jing-Jie Guo Harbin Medical University Cancer Hospital Harbin 150001China National Key Laboratory for Precision Hot Processing of Metals School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China

Two medium-entropy alloys,NbZrTi and NbHfZrTi,were prepared by arc *** NbZrTi and NbHfZrTi alloys are composed of simple body-centered cubic(bcc)solid solution phase and exhibit dendritic *** being homogenized,both NbZrTi and NbHfZrTi alloys are still composed of the single bcc solid solution phase,but the microstructure of the two alloys transforms from the dendritic structure into the polycrystalline *** alloys display significantly workhardening effect during compression at room temperature and show relatively good deformation plasticity during compressive deformation at room *** NbZrTi and NbHfZrTi alloys,the dynamic recrystallized grains form along the boundary during compression at the temperatures of 1073 and 1273 K.

关键词： Phase Microstructure Mechanical properties