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Numerical study on butterfly wings around inclusion based on damage evolution and semi-analytical method

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Friction 2022年第9期10卷 1335-1352页

作者： ye ZHOU Caichao ZHU Xiaojin CHEN Wei ye State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400030China College of Aerospace Engineering Chongqing UniversityChongqing 400044China Chongqing Wangjiang Industrial Co. Chongqing 400071China

Butterfly wings are closely related to the premature failure of rolling element *** this study,butterfly formation is investigated using the developed semi-analytical three-dimensional(3D)contact model incorporating inclusion and material property *** 3D elastic field introduced by inhomogeneous inclusion is solved by using numerical approaches,which include the equivalent inclusion method(EIM)and the conjugate gradient method(CGM).The accumulation of fatigue damage surrounding inclusions is described using continuum damage *** coupling between the development of the damaged zone and the stress field is *** effects of the inclusion properties on the contact status and butterfly formation are discussed in *** model provides a potential method for quantifying material defects and fatigue behavior in terms of the deterioration of material properties.

关键词： contact fatigue butterfly wings semi-analytical method damage evolution

Difference of a Hauptmodul for Γ_(0)(N ) and certain Gross-Zagier type CM value formulas

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Science China Mathematics 2022年第2期65卷 221-258页

作者： Dongxi ye School of Mathematics(Zhuhai) Sun Yat-sen UniversityZhuhai 519082China

In this work, we show that the difference of a Hauptmodul for a genus zero group Γ_(0)(N) as a modular function on Y_(0)(N) × Y_(0)(N) is a Borcherds lift of type(2, 2). As applications, we derive the monster denomi... 详细信息

关键词： Borcherds product the Gross-Zagier CM value formula monster denominator formula modular forms for the Weil representation

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食品4D打印技术在食品工业中的应用进展

食品工业科技 2025年第1期46卷 424-430页

作者：童强肖帅磊毕野吴豪董秀萍大连工业大学机械工程与自动化学院辽宁大连116034 海洋食品加工与安全控制全国重点实验室国家海洋食品工程技术研究中心辽宁省海产品精深加工产业共性技术创新平台大连市中式预制食品技术创新中心辽宁大连116034 大连工业大学食品交叉科学研究院辽宁大连116034

4D打印技术作为在3D打印的基础上增加了“时间”这个维度的新兴打印技术,不仅可以在三维空间内构建复杂结构,还能通过材料的预设形变来实现打印物体的自我组装和形态变化。4D打印技术作为新一代的增材制造技术,因演变过程完全可预测、... 详细信息

4D打印技术作为在3D打印的基础上增加了“时间”这个维度的新兴打印技术,不仅可以在三维空间内构建复杂结构,还能通过材料的预设形变来实现打印物体的自我组装和形态变化。4D打印技术作为新一代的增材制造技术,因演变过程完全可预测、可设计和可控制的特点,其潜力和影响力正在不断扩大。近年来,4D打印技术在现代食品加工领域也得到了广泛的研究和应用,通过4D打印实现食品结构、营养成分、口感等特性的精准控制。本文综述了食品4D打印技术原理、要素及优势,分析了食品4D打印在现代食品加工领域中的应用进展,包括4D打印材料特性、外界刺激等方面,并重点探讨了4D打印智能食品的微观结构控制与口感之间的关系,最后展望了食品4D打印技术发展趋势和挑战,旨在为现代食品加工领域提供参考借鉴。

关键词： 4D打印增材制造食品加工外界刺激微结构控制

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Effect of anisotropic resistance characteristic on boundary-layer transitional flow

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Applied Mathematics and Mechanics(English Edition) 2022年第12期43卷 1935-1950页

作者： Zheng HONG Zhengyin ye Kangling WU Kun ye National Key Laboratory of Science and Technology on Aerodynamic Design and Research Northwestern Polytechnical UniversityXi'an 710072China

It is observed that the feather surface exhibits anisotropic resistances for the streamwise and spanwise *** obtain a qualitative understanding about the effect of this anisotropic resistance feature of surface on the boundary-layer transitional flow over a flat plate,a simple phenomenological model for the anisotropic resistance is established in this *** means of the large eddy simulation(LES)with high-order accurate finite difference method,the numerical investigations are *** numerical results show that with the spanwise resistance hindering the formation of vortexes,the transition from laminar flow to turbulent flow can be delayed,and turbulence is weakened when the flow becomes fully turbulent,which leads to significant drag reduction for the *** the contrary,the streamwise resistance renders the flow less stable,which leads to the earlier transition and enhances turbulence in the turbulent region,causing a drag increase for the ***,it is indicated that a surface with large resistance for spanwise flow and small resistance for streamwise flow can achieve significant drag *** present results highlight the anisotropic resistance characteristic near the feather surface for drag reduction,and shed a light on the study of bird’s efficient flight.

关键词： anisotropic resistance transitional flow drag reduction numerical simulation

Bloch oscillation of Weyl metal along synthetic dimensions

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Chinese Physics B 2018年第12期27卷 104-109页

作者： ye Xiong Department of Physics and Institute of Theoretical Physics Nanjing Normal University

Synthetic dimensions in time(Sambe space)can be utilized in a periodic time-dependent *** subjecting the system into a time-periodic potential and measuring the physical quantities at distinct time in one period,one is able to simulate the models in higher *** verify this approach,we show that the Bloch oscillation of wave packets along the magnetic field in a three-dimensional(3D)Weyl metal can be simulated on a two-dimensional(2D)*** from the chiral anomaly,this Bloch oscillation is anisotropic when the initial wave packet is not on the 0-th Landau level.

关键词： synthetic dimensions Weyl metal

Investigation of the overconsolidation and structural behavior of Shanghai clays by element testing and constitutive modeling

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Underground Space 2016年第1期1卷 62-77页

作者： Guan-lin ye Bin ye Department of Civil Engineering and State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Geotechnical Engineering Tongji UniversityShanghai 200092China

The mechanical properties and constitutive modeling of Shanghai clays are very important for numerical analysis on geotechnical engineering in Shanghai,where continuous layers of soft clays run 30-40 m *** clays are divided into 5 major layers.A series of laboratory tests are carried out to investigate their mechanical *** top and bottom layers are overconsolidated hard clays,and the middle layers are normally consolidated or lightly overconsolidated sensitive marine clays.A constitutive model,which can describe the overconsolidation and structure of soils using only 8 parameters,is modified to simulate the test results.A rational procedure to determine the values of the material parameters and initial conditions is also *** model is able to effectively reproduce both one-dimensional(1D)consolidation and drained/undrained triaxial test results of Shanghai clays,with one set of parameters for each *** element testing and constitutive modeling,two findings are ***,the decay rates of overconsolidation are smaller in overconsolidated layers than in normally consolidated ***,the natural microstructure of layer 4 is relatively stable,that is,a large degree of structure is still maintained in the specimen even after 1D consolidation and drained triaxial *** modified model and obtained parameter values can be used for numerical analysis of geotechnical projects in Shanghai.

关键词： Shanghai clays Laboratory tests Constitutive model Overconsolidation Structure

Prior-based patch-level representation learning for electric vehicle battery state-of-charge estimation across a wide temperature scope

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Science China Technological Sciences 2024年第12期67卷 3682-3694页

作者： ye SongTao AN Dou Faculty of Electronic and Information Engineering Xi'an Jiaotong University

Electric vehicles(EVs) powered by lithium-ion batteries have emerged as a global development trend. To ensure the safe and stable driving of EVs, it is imperative to address battery safety and thermal management issues, which rely heavily on the precise state-of-charge(SOC) estimation of the battery. However, estimating SOC under uncontrolled environmental temperatures remains an unresolved challenge. This study proposes a patch-level representation learning model based on domain knowledge to estimate the SOC over a wide temperature range. First, patches were adopted as inputs instead of traditional points, thereby mitigating error accumulation and capturing dynamic changes in the battery from these more informative ***, the open-circuit voltage(OCV)-SOC-temperature relationship was incorporated to obtain the temperature-related SOC priors. Subsequently, the prior was updated recursively along the time dimension to obtain a more precise SOC estimate. The accuracy of the proposed model was confirmed experimentally for three driving cycles at six ambient temperatures, significantly reducing the root mean square error by 48.19% compared to popular existing models. Notably, the performance of the proposed method had an excellent improvement of 51.52% and 57.20% at-10°C and-20°C, respectively. Moreover, the parameter size of the proposed method was 39.748 KB, which significantly promoted the deployment and application of data-driven models in the real world.

关键词： lithium-ion battery data-driven prior knowledge state-of-charge wide temperature scope

编码方式与叙事连贯性调节情绪对时间顺序记忆的影响

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心理学报 2025年第1期57卷 1-17页

作者：夏莲香刘凯歌李新宇叶群浙江师范大学心理学院浙江省儿童青少年心理健康与危机干预智能实验室金华321004 浙江全省智能教育技术与应用重点实验室金华321004

时间顺序信息作为记忆项目之间的重要联结要素之一,易受到情绪的干扰。本研究通过3项实验探究编码方式与叙事连贯性是否以及如何调节情绪对于时间顺序记忆的干扰。实验1采用2(编码方式:叙事编码/离散编码)×3(情绪类型:正性/负性/中性)... 详细信息

时间顺序信息作为记忆项目之间的重要联结要素之一,易受到情绪的干扰。本研究通过3项实验探究编码方式与叙事连贯性是否以及如何调节情绪对于时间顺序记忆的干扰。实验1采用2(编码方式:叙事编码/离散编码)×3(情绪类型:正性/负性/中性)的混合实验设计,其中编码方式为被试间变量,探究编码方式是否能调节图片材料中情绪信息对时间顺序记忆的干扰。结果显示,在离散编码组,负性情绪条件下的时间顺序记忆正确率显著比其他两种条件低;相反,在叙事编码组,三种情绪类型下的时间顺序记忆没有显著差异。实验2采用两种情绪类型(中性和负性)的词语刺激,检验编码方式对时间顺序记忆的影响是否跨材料具有普适性。实验3通过操纵项目之间的叙事连贯性程度,进一步探究上述效应是否依赖于项目间连贯性程度。结果显示,上述叙事编码效应仅在项目之间具有高连贯性时出现。本研究不仅发现了叙事编码对于情绪记忆中时间信息的保持机制,还指明了叙事编码效应中连贯性程度的重要性。

关键词：情绪叙事编码时间记忆情景记忆叙事连贯性

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Detection and Estimation of False Data Injection Attacks for Load Frequency Control Systems

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Journal of Modern Power Systems and Clean Energy 2022年第4期10卷 861-870页

作者： Jun ye Xiang Yu Hangzhou Innovation Institute Beihang UniversityHangzhouChina School of Automation Science and Electrical Engineering Beihang UniversityBeijingChina

False data injection attacks(FDIAs)against the load frequency control(LFC)system can lead to unstable operation of power *** this paper,the problems of detecting and estimating the FDIAs for the LFC system in the presence of external disturbances are ***,the LFC system model with FDIAs against frequency and tie-line power measurements is ***,a design procedure for the unknown input observer(UIO)is presented and the residual signal is generated to detect the *** UIO is designed to decouple the effect of the unknown external disturbance on the residual *** that,an attack estimation method based on a robust adaptive observer(RAO)is proposed to estimate the state and the FDIAs *** order to improve the performance of attack estimation,the H¥technique is employed to minimize the effect of external disturbance on estimation errors,and the uniform boundedness of the state and attack estimation errors is proven using Lyapunov stability ***,a two-area interconnected power system is simulated to demonstrate the effectiveness of the proposed attack detection and estimation algorithms.

关键词： External disturbance false data injection attacks load frequency control robust adaptive observer unknown input observer