Full-Scale Isogeometric Topology Optimization of Cellular Structures Based on Kirchhoff-Love Shells

Cellular thin-shell structures are widely applied in ultralightweight designs due to their high bearing capacity and strength-to-weight ratio.In this paper,a full-scale isogeometric topology optimization(ITO)method based on Kirchhoff-Love shells for designing cellular tshin-shell structures with excellent damage tolerance ability is proposed.This method utilizes high-order continuous nonuniform rational B-splines(NURBS)as basis functions for Kirchhoff-Love shell elements.The geometric and analysis models of thin shells are unified by isogeometric analysis(IGA)to avoid geometric approximation error and improve computational accuracy.The topological configurations of thin-shell structures are described by constructing the effective density field on the controlmesh.Local volume constraints are imposed in the proximity of each control point to obtain bone-like cellular structures.To facilitate numerical implementation,the p-norm function is used to aggregate local volume constraints into an equivalent global constraint.Several numerical examples are provided to demonstrate the effectiveness of the proposed method.After simulation and comparative analysis,the results indicate that the cellular thin-shell structures optimized by the proposed method exhibit great load-carrying behavior and high damage robustness.

The Emergence of Loving Pedagogy in the L2 Affective Domain:How Affective Pedagogy Accounts for Chinese EFL Teachers’Professional Success and Job Satisfaction?

The success of teachers in professional environments has a desirable influence on their mental condition.Simply said,teachers’professional success plays a crucial role in improving their mental health.Due to the invaluable role of professional success in teachers’mental health,personal and professional variables helping teachers succeed in their profession need to be uncovered.While the role of teachers’personal qualities has been well researched,the function of professional variables has remained unknown.To address the existing gap,the current investigation measured the role of two professional variables,namely job satisfaction and loving pedagogy,in Chinese EFL teachers’professional success.To do this,three validated scales were provided to 1591 Chinese EFL teachers.Participants’answers to the questionnaires were analyzed using the Spearman correlation test and structural equation modeling.The data analysis demonstrated a strong,positive link between the variables.Moreover,loving pedagogy was found to be the positive,strong predictor of Chinese EFL teachers’job satisfaction and professional success.The findings of the current inquiry may help educational administrators enhance their instructors’professional success,which in turn promotes their mental and psychological conditions at work.

Analyzing the Differences in the Concepts of Love Between Korean and American Women Using the Female Characters in Kim Ji-young,Born in 1982 and The Sun Also Rises as Examples

This paper scrutinizes the differences in the conceptualization of love between Korean and American women.Grounded in an analysis of literary figures,Brett and Kim Ji-young,the study unravels the intricate interplay of cultural,historical,and societal forces shaping these perspectives.The contrasting landscapes of the United States,driven by ideals of freedom and individualism,and Korea,entrenched in Confucian values and collectivism,serve as crucibles for forming women’s roles,self-perception,and societal expectations.The examination extends to communication styles,illuminating the directness of American expression versus Korea’s reliance on formalism.Through this exploration,the paper illustrates the profound impact of cultural contexts on the intricate tapestry of love,offering a nuanced understanding of divergent viewpoints within a global context.

论基础教育教师培训中学者的“陪伴式引领”

教师培训中高校学者是引领中小学教师专业成长的重要力量,但在实践中学者常陷入“角色困境”,专业引领作用受到局限,理论与实践的隔膜未能有效突破。深入分析学者陷入“角色困境”的深层次原因,着眼于学者与中小学教师的文化理解、角色定位、空间重构以及精神陪伴,更全面地认识学者的价值与贡献,构建学者对中小学教师“陪伴式引领”的理念及行为模型,是破解理论引领与实践落地相互割裂的瓶颈问题的关键。“陪伴式引领”以学习型组织理论、道德领导理论以及“第三空间”理论为基础,建构以倾听(Listen)、赋责(Oblige)、走访(Visit)、共历(Experience)为核心要素的“LOVE行为模型”,并通过“主题引领的双微机制”,营造中小学教师与高校学者共创共生的培训生态。

Improvement Design of Waterfront Landscape—With the Yellow River Scenic Area in Zhengzhou City as a Study Case

From the perspective of "human", this study focuses on the feeling of people in a certain region about the waterfront environment, by combining with theories in landscape architecture, environmental psychology and other interdisciplines, in view of present situation of waterfront landscapes in the Yellow River Scenic Area of Zhengzhou City, tries to find new approaches for waterfront landscape design and development based on landscape design principles and exploration of the human's nature of loving water and the interaction between tourists and waterfront landscapes.

青藏高原中部Quasi-Love波的识别及其转换点揭示的东西向方位各向异性变化

目前人们利用4种基本的地震波现象研究地震各向异性,如横波双折射、面波散射、与传播方向有关的走时异常和PS转换波震相.本文利用面波散射产生的Quasi-Love(QL)波研究青藏高原上地幔顶部的各向异性结构特征.首先利用中国地震台网昌都(CAD)台记录的地震波形资料识别出产生QL波的路径,并利用合成地震记录和垂直偏振极性分析证实所观测到的为QL波,而不是高阶振型的Rayleigh波或其他体波震相;然后由Rayleigh波、Love波和QL波的群速度估算了各向异性结构横向变化的转换点;不同周期时,转换点的位置不同.这种频率依赖性还需要进一步的模拟研究.Love波向Rayleigh波耦合(产生QL波)的转换点位置揭示了青藏高原面波方位各向异性变化特征,并以南北向构造带的东西分段性、上地幔流引起的地球内力诱导岩石形变解释了青藏高原各向异性的东西向差异性.

Love-You Wonderful Thing!A Brief Philosophy and Pedagogy About Love

This study is a brief attempt to uncover the secret of love.From the extremely rich literature on the subject,it relies on only four classic thinkers and writers(Plato,Shakespeare,Attila József,Marx),among whom Marx’s relevant statement is less known even among love researchers.Furthermore,it intends to draw attention to some notable Hungarian philosophers and poets.The ultimate message of the examination is that,although love is the subjective,intimate sphere of a person,it hopefully becomes clear how lovers can create human and communal relationships with each other and with their narrower and broader environment.

Love Donation

At my school,we made donations to children in the flooded areas last week.All the teachers and students volunteered,so did I.Besides books,I donated schoolbags,clothes,toys and so on.I am willing giving①away these things,because I feel it's my duty to help those in trouble.

Ubase数据库系统缓冲管理器的实现

缓冲区技术是减少系统对外存访问的重要方法之一。文章分析了Ubase数据库系统缓冲管理器的基本功能,对常用页面替换算法的性能进行了比较,最终选择Love/Hate算法代替LRU算法实现了Ubase数据库系统的缓冲管理,降低了系统的开销,提高了Ubase数据库系统的性能。

Implicit Love and Passionate Love-Contrast the Diction in "Song To Celia" by Ben Jonson and that in "The Canonization" by John Donne

Love is a permanent theme in the world's history of literature.With different dictions(choice of words),poets can portray diverse images of love,thus leaving completely distinct impression on the readers' minds.By analyzing and contrasting the diction in "Song To Celia" by Ben Jonson and that in "The Canonization" by John Donne,this essay aims to illustrate that different dramatic effects could be achieved with different choices of words in creative writing,and diction could be a representative symbol of a poet's writing style.

God's Love as a Theme through the Whole Old Testament

This paper makes studies on God's love as a theme through the whole Old Testament. First the paper points out the impact of modern science and technology on people's thoughts and opinions about religions, while laying emphasis on the concept"God's love"and then the paper tracks the deep and great love through Old Testament, trying to demonstrate it in all directions.

Comparisons and Contrasts between Liu Yong's Tune:Bells Ringing in the Rain and John Donne's A Valediction:Forbidding Mourning

In the eyes of history,the separation,especially separation between lovers is an eternal theme in literature works.In this paper,through comparisons and contrasts between Liu Yong’s Bells in the Ringing in the Rain and John Donne’s A Valediction:Forbidding Mourning from various perspectives and different backgrounds,the similarities as well as differences between these two Chinese and English poems can be perceived.A comprehensive and better understanding of the theme of separation can be obtained as well.

用信息交互引导真实交流——李磊老师执教《小学英语》(新标准)三起七册《Module 7 unit2 Pandas love bamboo》课例评析

李磊老师执教新标准三起七册《Module 7 unit2 Pandas love bamboo》这一课时的教学内容和目标话题主要是运用a certain kind of animals love some-thing这一核心句型描述不同动物各自的习性．也是对本模块unit1中所学关于动物生活习性的相关语言点的综合运用和复习巩固．运用目标语言进一步讨论动物的行为偏好与习性特点。本单元教材没有提供成篇的语言素材．而是一系列需要复习巩固的句型对话和课堂运用的活动方案。由此可见，这一课侧重于展开相关话题的交互性语言活动．以引导学生运用目标语言。小学英语课堂交互性语言活动设计的重点在于创设语境，设置恰当的交际任务，引导学生在运用目标语言执行任务的过程中识记目标语言的音形义．感知修辞色彩，了解相关主题交流中的文化习俗，领会语言的表意功能。

Surface effect and non-local elasticity in wave propagation of functionally graded piezoelectric nano-rod excited to applied voltage

A non-local solution for a functionally graded piezoelectric nano-rod is pre- sented by accounting the surface effect. This solution is used to evaluate the charac- teristics of the wave propagation in the rod structure. The model is loaded under a two-dimensional （2D） electric potential and an initially applied voltage at the top of the rod. The mechanical and electrical properties are assumed to be variable along the thick- ness direction of the rod according to the power law. The Hamilton principle is used to derive the governing differential equations of the electromechanical system. The effects of some important parameters such as the applied voltage and gradation of the material properties on the wave characteristics of the rod are studied.

On James Fenimore Cooper's View of Race from The Last of the Mohicans

James Fenimore Cooper is a very famous and popular writer in America who is the founder of the America literature on romanticism, so he is called the first American novelist. In 1820, Cooper publishes his first novel, from then on he publishes over 50 novels altogether. The characters we are talking about are from one of his best known novels"The Last of the Mohicans",the second part of The Leatherstocking Tales which is his most famous and influencing novel. Through the novel, the author believes that the process of the early American movement towards the west is actually a process of massacre of American Indians.The article points out that James Fenimore Cooper has sympathy with American Indians, but at the same time showing his ambiguities on many issues.

Frequency Dispersion of Love Waves in a Piezoelectric Nanofilm Bonded on a Semi-infinite Elastic Substrate

Research on the propagation of elastic waves in piezoelectric nanostructures is very limited. The frequency dispersion of Love waves in layered piezoelectric nanostructures has not yet been reported when surface effects are taken into account. Based on the surface elasticity theory, the propagation of Love waves with surface effects in a structure consisting of a nanosized piezoelectric film and a semi-infinite elastic substrate is investigated focusing on the frequency dispersion curves of different modes. The results show that under the electrically-open conditions, surface effects give rise to the dependence of Love wave dispersion on the film thickness when the thickness of the piezoelectric film reduces to nanometers. For a given wave frequency, phase velocity of Love waves in all dispersion modes exhibit obvious toward shift as the film thickness decreases or the surface parameters increase. Moreover, there may exist a cut-off frequency in the first mode dispersion below which Love waves will be evanescent in the structure due to surface effects. The cut-off frequency depends on the film thickness, the surface parameters and the bulk material properties.

SCATTERING OF LOVE WAVES BY AN INTERFACE CRACK BETWEEN A PIEZOELECTRIC LAYER AND AN ELASTIC SUBSTRATE

The scattering of Love waves by an interface crack between apiezoelectric layers and an elas- tic substrate is investigated byusing the integral transform and singular integral equationtechniques. The dy- namic stress intensity factors of the left andthe right crack tips are determined. It is found from numericalcalculation that the dynamic response of the system dependssignificantly on the crack configuration, the ma- terial combinationand the propagating direction of the incident wave. It is expectedthat specifying an appro- priate material combination may retard thegrowth of the crack for a certain crack configuration.

Shape Sensing of Thin Shell Structure Based on Inverse Finite Element Method

Shape sensing as a crucial component of structural health monitoring plays a vital role in real-time actuation and control of smart structures,and monitoring of structural integrity.As a model-based method,the inverse finite element method(iFEM)has been proved to be a valuable shape sensing tool that is suitable for complex structures.In this paper,we propose a novel approach for the shape sensing of thin shell structures with iFEM.Considering the structural form and stress characteristics of thin-walled structure,the error function consists of membrane and bending section strains only which is consistent with the Kirchhoff–Love shell theory.For numerical implementation,a new four-node quadrilateral inverse-shell element,iDKQ4,is developed by utilizing the kinematics of the classical shell theory.This new element includes hierarchical drilling rotation degrees-of-freedom(DOF)which enhance applicability to complex structures.Firstly,the reconstruction performance is examined numerically using a cantilever plate model.Following the validation cases,the applicability of the iDKQ4 element to more complex structures is demonstrated by the analysis of a thin wallpanel.Finally,the deformation of a typical aerospace thin-wall structure(the composite tank)is reconstructed with sparse strain data with the help of iDKQ4 element.

Human Beings'Forever Aspiration for Love-Review of A Haunted House

In this essay, I will explore human being's aspiration for love conveyed in the novel A Haunted House by Virginia Woolf. The exploration starts from the analysis of the ghostly couple's horror for death, the living couples dreaming of the ghostly cou ples' finding of the treasure of love, and finally to the description of the loving scenes of this couple.

The Last Temptation

The last temptation of Christ is a controversial great work,and few contemporary vraters can use such a broad mind to examine the temptation and suffering of reality.Based on the director' s point of view,this paper not only analyzes the side of Jesus' human nature,but also analyzes his divine side.Finally,the author suggests that we can use love and hope to face life.