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Investigation of Induced Unbalance Magnitude on Dynamic Characteristics of High-speed Turbocharger with Floating Ring Bearings

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Chinese Journal of Mechanical Engineering 2018年第5期31卷 99-109页

作者： Guang-Fu Bin Yuan Huang shuai-Ping Guo Xue-Jun Li gang Wang Health Maintenance for Mechanical Equipment Key Lab of Hunan Province Hunan University of Science and Technology Xiangtan 411201 China Department of Mechanical and Aerospace Engineering The University of Alabama in Huntsville AL 35899 USA

Due to operational wear and uneven carbon absorption in compressor and turbine wheels, the unbalance(me) vibration is induced and could lead to sub?synchronous vibration accidents for high?speed turbocharger(TC). There are very few research works that focus on the magnitude e ects on such induced unbalance vibration. In this paper, a finite element model(FEM) is developed to characterize a realistic automotive TC rotor with floating ring bearings(FRBs). The nonlinear dynamic responses of the TC rotor system with di erent levels of induced unbalance magni?tude in compressor and turbine wheels are calculated. From the results of waterfall and response spectral intensity plots, the bifurcation and instability phenomena depend on unbalance magnitude during the startup of TC. The sub?synchronous component 0.12× caused rotor unstable is the dominant frequency for small induced unbalance. The nonlinear e ects of induced unbalance in the turbine wheel is obvious stronger than the compressor wheel. As the unbalance magnitude increases from 0.05 gbration 1·mm to 0.2 g·mm, the vibration component changes from mainly 0.12× to synchronous vi×. When unbalance increases continuously, the rotor vibration response amplitude is rapidly growing and the 1× caused by the large unbalance excitation becomes the dominant frequency. A suitable un?balance magnitude of turbine wheel and compressor wheel for the high?speed TC rotor with FRBs is proposed: the value of induced un?balance magnitude should be kept around 0.2 g·mm.

关键词： High?speed TC with FRBs Induced unbalance magnitude Nonlinear dynamic response Sub?synchronous vibration Stability

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《民法典》用人者替代责任的司法解释完善--兼论网络平台用工关系替代责任的法律适用

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北京理工大学学报（社会科学版） 2025年第1期27卷 44-55页

作者：王竹帅仁策四川大学法学院四川成都610207

《民法典侵权责任编解释(一)》第15条将“用工单位劳务关系”和“个体工商户用工关系”纳入《民法典》第1191条第1款规定的“用人单位”替代责任的适用范围,但未能明确网络平台用工替代责任的法律适用规则。《民法典》第1191~第1193条... 详细信息

《民法典侵权责任编解释(一)》第15条将“用工单位劳务关系”和“个体工商户用工关系”纳入《民法典》第1191条第1款规定的“用人单位”替代责任的适用范围,但未能明确网络平台用工替代责任的法律适用规则。《民法典》第1191~第1193条已构建“用人单位劳动关系—个人劳务关系—独立承揽关系”三分法用工关系谱系。应当以第1191条第1款为中心补正用工单位劳务关系替代责任规则的缺失,以第1192条为中心构建个体工商户用工关系替代责任法律适用框架,以第1193条为中心构建网络平台用工替代责任法律适用框架。

关键词：用人者替代责任用人单位用工单位个体工商户网络平台用工

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轮毂电动机驱动车辆并联式复合制动策略

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江苏大学学报（自然科学版） 2025年第1期46卷 9-17页

作者：付翔肖帅徐超武汉理工大学汽车工程学院湖北武汉430070

基于并联式轮毂电动机驱动实车构型,分析影响制动能量回收效率的主要因素,采用联邦卡尔曼滤波纵向车速估计算法,提出了三层式复合制动控制策略.该策略中的制动决策层根据踏板输入信号和行驶状态来识别制动工况,并进入相应的制动模式.制... 详细信息

基于并联式轮毂电动机驱动实车构型,分析影响制动能量回收效率的主要因素,采用联邦卡尔曼滤波纵向车速估计算法,提出了三层式复合制动控制策略.该策略中的制动决策层根据踏板输入信号和行驶状态来识别制动工况,并进入相应的制动模式.制动控制层根据制动决策层的指令,在常规制动工况下通过粒子群优化(PSO)算法优化前、后轮电制动力矩分配,实现电池有效回收效率最大化;紧急制动工况下,通过模糊自整定PID算法实现车辆在不同附着路面上各轮滑移率的安全有效控制,优化了制动防抱死控制的鲁棒性,提高制动安全性.制动执行层响应制动控制层的指令,设计了电制动补偿机制,以迅速补偿调节各轮轮缸的压力误差,提高车辆制动稳定性.最后实车验证了该复合控制策略的有效性.

关键词：轮毂电动机驱动车辆并联式复合制动粒子群优化制动能量回收模糊自整定PID

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种植模式对农田水-沙-氮磷流失特征的影响研究

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吉林水利 2025年第1期 40-45页

作者：刘帅水发规划设计有限公司山西分公司山西太原030027

在作物生产的过程中,由降雨、灌溉等因素造成的农田土壤侵蚀及氮磷流失会导致土地生产力退化,威胁粮食生产,因此需要分析农田土壤侵蚀及氮磷流失的影响因素。不同种植模式对水土保持有着不同的影响,本文围绕旱作、水作及水旱轮作3种种... 详细信息

在作物生产的过程中,由降雨、灌溉等因素造成的农田土壤侵蚀及氮磷流失会导致土地生产力退化,威胁粮食生产,因此需要分析农田土壤侵蚀及氮磷流失的影响因素。不同种植模式对水土保持有着不同的影响,本文围绕旱作、水作及水旱轮作3种种植模式,对自然降雨条件下的产流产沙及径流氮磷流失规律进行研究,明确流失特征,其结果可为农田水土保持和粮食生产安全提供参考。

关键词：土壤侵蚀种植模式氮磷流失

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Analysis on clogging of submerged entry nozzle in continuous casting of high strength steel with rare earth

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Journal of Iron and Steel Research International 2022年第1期29卷 34-43页

作者： Wei Liang Jing Li Bin Lu Jian-guo zhi shuai Zhang Yang Liu State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Inner Mongolia Baotou Steel Union Co. Ltd.Baotou 014010Inner MongoliaChina

The type of inclusions in tundish steel and the formation mechanism of the submerged entry nozzle(SEN)clogging in the continuous casting of the rare earth(RE)high strength steel without calcium treatment were studied based on the plant trials and thermodynamic *** was found that Ce_(2)O_(3) and CeAlO_(3) in tundish molten steel were transformed into Ce_(2)O_(2)S+CaO-Al_(2)O_(3) with the size of 2-3 lm during *** the flow velocity of molten steel on surface of the SEN was slow due to the boundary layer effect,Ce_(2)O_(3) inclusion in molten steel reacted with Al_(2)O_(3) in the SEN refractory to form *** the continuous erosion of molten steel and reaction,the compositions of CeAlO_(3),Al_(2)O_(3) and CaO were aggregated,and the clogging layers with different zones were formed on surface of the ***,a small amount of molten steel remaining in the arc zone and corner zone of the SEN formed solidified *** calcium treatment is canceled,the reaction probability between inclusions in molten steel and refractory should be reduced by improving the material and shape of the SEN.

关键词： Rare earth inclusion Tundish Submerged entry nozzle Clogging Thermodynamic calculation

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Cooperative interception with fast multiple model adaptive estimation

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Defence Technology（防务技术） 2021年第6期17卷 1905-1917页

作者： Shao-bo Wang Yang Guo Shi-cheng Wang zhi-guo Liu shuai Zhang Xi’an Research Institution of Hi-Technology China Xi’an Research Institution of Hi-Technology Northwestern Polytechnical UniversityChina

For the case that two pursuers intercept an evasive target,the cooperative strategies and state estimation methods taken by pursuers can seriously affect the guidance accuracy for the target,which performs a bang For the case that two pursuers intercept an evasive target,the cooperative strategies and state estimation methods taken by pursuers can seriously affect the guidance accuracy for the target,which performs a bang-bang evasive maneuver with a random switching *** Fast multiple model adaptive estimation(Fast MMAE)algorithm,the cooperative guidance law takes detection configuration affecting the accuracy of interception into *** the detection error model related to the line-of-sight(LOS)separation angle of two interceptors,an optimal cooperative guidance law solving the optimization problem is designed to modulate the LOS separation angle to reduce the estimation error and improve the interception *** to the uncertainty of the target bang-bang maneuver switching time and the effective fitting of its multi-modal motion,Fast MMAE is introduced to identify its maneuver switching time and estimate the acceleration of the target to track and intercept the target *** designed cooperative optimal guidance law with Fast MMAE has better estimation ability and interception performance than the traditional guidance law and estimation method via Monte Carlo simulation.

关键词： Cooperative guidance Optimal control Fast multiple model adaptive estimation (fast MMAE) Bang-bang maneuver Switch time Detection configuration Estimation error

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Hydrodynamic Response of A Fully Coupled TLP Hull-TTR System with Detailed Modeling of A Hydraulic Pneumatic Tensioner and Riser Joints

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China Ocean Engineering 2022年第3期36卷 451-463页

作者： HAO shuai YU Yang YU Jian-xing YUAN zhi-ming XU Li-xin Maritime College Tianjin University of TechnologyTianjin 300384China State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China Tianjin Key Laboratory of Port and Ocean Engineering Tianjin UniversityTianjin 300072China Department of Naval Architecture Ocean&Marine EngineeringUniversity of StrathclydeGlasgow G40LZUK

Tension Leg Platform(TLP)in deepwater oil and gas field development usually consists of a hull,tendons,and top tension risers(TTRs).To maintain its top tension,each TTR is connected with a tensioner system to the *** to the complicated configuration of the tensioners,the hull and TTRs form a strong coupled ***,some simplified tensioner models are applied to analyze the TLP *** is a large discrepancy between their analysis results and the actual mechanism behaviors of a *** is very necessary to develop a more detailed tensioner model to consider the coupling effects between TLP and *** the present study,a fully coupled TLP hull-TTR system for hydrodynamic numerical simulation is established.A specific hydraulic pneumatic tensioner is modeled by considering 4 *** production TTR model is stacked up by specific riser *** simulation is also extended to analyze an array of *** regular and irregular waves are *** behaviors of different cylinders are *** results show that it is important to consider the specific configurations of the tensioner and TTRs,which may lead to obviously different response behaviors,compared with those from a simplified model.

关键词： top tension riser(TTR) fully coupled hull-tendon-TTR-tensioner model hydraulic pneumatic tensioner hydrodynamic response 3D potential flow theory

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Enhancing the bake-hardening responses of a pre-aged Al-Mg-Si alloy by trace Sn additions

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Journal of Materials Science & Technology 2020年第5期40卷 107-112页

作者： gang Lu shuai Nie Jianjun Wang Ying Zhang Tianhai Wu Yujie Liu Chunming Liu Key Laboratory for Anisotropy and Texture of Materials(MoE) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China The State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China Research Center for Metallic Wires Northeastern UniversityShenyang 110819China Shenyang Industrial Transformation Upgrading Promotion Center Shenyang 110083China

Effects of additions of trace Sn on the bake-hardening responses of a pre-aged Al-0.85 Mg-0.85 Si(in wt%)alloy were investigated through mechanical tests,differential scanning calorimetry,electrical resistivity and transmission electron *** indicate that trace Sn additions reduced the number density of pre-aging clusters by inhibiting the formation of unstable counterpart during pre-aging treatment,leading to low strength and high supersaturation of solute *** a subsequent paint-bake treatment,the presence of highly supersaturated solute atoms and high concentrated free vacancies moderated the activation energy barrier ofβ’’phase and thus kinetically accelerated the formation ofβ’’.Consequently,the trace Sn additions enhanced the bake-hardening responses of the pre-aged alloys *** Sn-containing pre-aged Al-Mg-Si alloys with low strength and great bake-hardening responses hold promising potential for automotive body skin applications.

关键词： Al-Mg-Si alloy Pre-aging Trace Sn Bake-hardening responses Precipitation kinetics

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Epigenetic and post-translational modifications in autophagy:biological functions and therapeutic targets

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Signal Transduction and Targeted Therapy 2023年第2期8卷 581-603页

作者： Feng Shu Han Xiao Qiu-Nuo Li Xiao-shuai Ren zhi-gang Liu Bo-Wen Hu Hong-Sheng Wang Hao Wang Guan-Min Jiang Department of Clinical Laboratory The Fifth Affiliated Hospital of Sun Yat-sen UniversityZhuhaiGuangdongChina Cancer Center Affiliated Dongguan HospitalSouthern Medical UniversityDongguanGuangdongChina Department of Urology The Fifth Affiliated Hospital of Sun Yat-sen UniversityZhuhaiGuangdongChina Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical SciencesSun Yat-sen UniversityGuangzhouGuangdongChina Department of Clinical Laboratory The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhuiChina

Autophagy is a conserved lysosomal degradation pathway where cellular components are dynamically degraded and re-processed to maintain physical ***,the physiological effect of autophagy appears to be *** the one hand,autophagy functions as a cytoprotective mechanism,protecting against multiple diseases,especially tumor,cardiovascular disorders,and neurodegenerative and infectious ***,autophagy may also play a detrimental role via pro-survival effects on cancer cells or cell-killing effects on normal body *** disorder onset and progression,the expression levels of autophagy-related regulators and proteins encoded by autophagy-related genes(ATGs)are abnormally regulated,giving rise to imbalanced autophagy ***,the detailed mechanisms and molecular events of this process are quite ***,including DNA methylation,histone modifications and miRNAs,and post-translational modifications,including ubiquitination,phosphorylation and acetylation,precisely manipulate gene expression and protein function,and are strongly correlated with the occurrence and development of multiple *** is substantial evidence that autophagy-relevant regulators and machineries are subjected to epigenetic and post-translational modulation,resulting in alterations in autophagy levels,which subsequently induces disease or affects the therapeutic effectiveness to *** this review,we focus on the regulatory mechanisms mediated by epigenetic and post-translational modifications in disease-related autophagy to unveil potential therapeutic *** addition,the effect of autophagy on the therapeutic effectiveness of epigenetic drugs or drugs targeting post-translational modification have also been discussed,providing insights into the combination with autophagy activators or inhibitors in the treatment of clinical diseases.

关键词： therapeutic drugs protective

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Correlation between the charge radii difference in mirror partner nuclei and thesymmetry energy slope

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Chinese Physics C 2024年第8期48卷 177-184页

作者： Xiao-Rong Ma shuai Sun Rong An Li-gang Cao School of Physics Ningxia UniversityYinchuan 750021China Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Key Laboratory of Beam Technology of Ministry of Education Institute of Radiation TechnologyBeijing Academy of Science and TechnologyBeijing 100875China

A correlation between the charge radii difference of mirror partner nucleiΔR_(ch) and the slope parameter L of symmetry energy has been built to ascertain the equation of state of isospin asymmetric nuclear *** this work,the influences of pairing correlations and isoscalar compression modulus on theΔRch are systematically investigated based on the Skyrme energy density functional *** calculated results suggest that the linear correlation betweenΔR_(ch) and L is decreased by the surface pairing *** slope parameter deduced from the difference of charge radii of mirror-pair nuclei ^(32)Ar-^(32)Si,^(36)Ca-^(36)S,^(38)Ca-^(38)Ar,and ^(54)Ni-^(54)Fe falls into the range of L=42.57−50.64 MeV,that is,the rather soft equation of state of asymmetric nuclear ***,the range of the slope parameter can also be influenced by the effective forces classified by various isoscalar incompressibility coefficients.

关键词： symmetry energy charge radius mirror-pair nuclei slope parameter

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