A novel approach of jet polishing for interior surface of small-grooved components using three developed setups

It is a challenge to polish the interior surface of an additively manufactured component with complex structures and groove sizes less than 1 mm.Traditional polishing methods are disabled to polish the component,meanwhile keeping the structure intact.To overcome this challenge,small-grooved components made of aluminum alloy with sizes less than 1 mm were fabricated by a custom-made printer.A novel approach to multi-phase jet(MPJ)polishing is proposed,utilizing a self-developed polisher that incorporates solid,liquid,and gas phases.In contrast,abrasive air jet(AAJ)polishing is recommended,employing a customized polisher that combines solid and gas phases.After jet polishing,surface roughness(Sa)on the interior surface of grooves decreases from pristine 8.596μm to 0.701μm and 0.336μm via AAJ polishing and MPJ polishing,respectively,and Sa reduces 92%and 96%,correspondingly.Furthermore,a formula defining the relationship between linear energy density and unit defect volume has been developed.The optimized parameters in additive manufacturing are that linear energy density varies from 0.135 J mm^(-1)to 0.22 J mm^(-1).The unit area defect volume achieved via the optimized parameters decreases to 1/12 of that achieved via non-optimized ones.Computational fluid dynamics simulation results reveal that material is removed by shear stress,and the alumina abrasives experience multiple collisions with the defects on the heat pipe groove,resulting in uniform material removal.This is in good agreement with the experimental results.The novel proposed setups,approach,and findings provide new insights into manufacturing complex-structured components,polishing the small-grooved structure,and keeping it unbroken.

THE INTERIOR TRANSMISSION EIGENVALUE PROBLEM FOR AN ANISOTROPIC MEDIUM BY A PARTIALLY COATED BOUNDARY

We consider the interior transmission eigenvalue problem corresponding to the scattering for an anisotropic medium of the scalar Helmholtz equation in the case where the boundary?Ωis split into two disjoint parts and possesses different transmission conditions.Using the variational method,we obtain the well posedness of the interior transmission problem,which plays an important role in the proof of the discreteness of eigenvalues.Then we achieve the existence of an infinite discrete set of transmission eigenvalues provided that n≡1,where a fourth order differential operator is applied.In the case of n■1,we show the discreteness of the transmission eigenvalues under restrictive assumptions by the analytic Fredholm theory and the T-coercive method.

The“Digital”Approach Impact Today:Modularity in Interior Architecture

Understanding digital technology requires a shift in mindset that takes into account the broader implications of design,social dynamics,environmental factors,and cultural influences.Acknowledging the fact that technology is not confined to the virtual domain but rather has a tangible influence on our daily lives and the surrounding environment,the extensive integration and potential of digital technologies offer a distinctive prospect to fundamentally transform our shared comprehension of architecture.Digital technologies are revolutionizing design practices,manufacturing processes,and our engagement with and understanding of the built environment,by fostering the development of novel models that promote equity and inclusivity.The application of“digital technologies”can function as a methodology for examining and expressing the possible paths of emerging digital technologies.Extrapolate the expected impact of digital technologies on the design,development,and occupancy of the environment to achieve a more sustainable future in the long run.This paper will examine the potential connections and origins of digital technology concerning modularity,as well as the implications of modularity on forthcoming architectural developments in customization.

Discussion on the Talent Cultivation Strategy for Interior Design in Vocational Colleges from the Perspective of Industry-Education Integration

To further enhance the effectiveness of talent cultivation for interior design in vocational colleges,it is necessary to vigorously promote the construction of an industry-education integration model.Through this model,the roles of both enterprises and schools can be leveraged to jointly facilitate the continuous improvement of students’professional abilities and practical skills,providing a steady stream of high-quality talents for the development of the interior design field.Therefore,this paper analyzes the current issues in interior design talent cultivation in vocational colleges from the perspective of industry-education integration and proposes corresponding improvement measures.

Mapping the Child’s Grey Interior:Authenticity of Plague Narrative in The Great Plague

The Great Plague:The Diary of Alice Paynton,London 1665-1666 adopts the realistic painting style and direct writing to the painful experience,describes the situation of the Great Plague in London truly from the perspective of children,and breaks people’s cognitive expectation of children’s literature,the construction of children’s Gray inner world is completed behind the true description of the Great Plague in London with the true brushwork,which presents a different world of childlike innocence.Despite the importance of epidemics writing in literature,the child’s diary perspective of them is one of the least developed of Plague Narrative.Only when authenticity and the child’s grey interior are integrated will we reveal a true picture of society as it was.

The Non-Singular Fast Terminal Sliding Mode Control of Interior Permanent Magnet Synchronous Motor Based on Deep Flux Weakening Switching Point Tracking

This paper presents a novel non-singular fast terminal sliding mode control(NFTSMC)based on the deep flux weakening switching point tracking method in order to improve the control performance of permanent interior magnet synchronous motor(IPMSM)drive systems.The mathematical model of flux weakening(FW)control is established,and the deep flux weakening switching point is calculated accurately by analyzing the relationship between the torque curve and voltage decline curve.Next,a second-order NFTSMC is designed for the speed loop controller to ensure that the system converges to the equilibrium state in finite time.Then,an extended sliding mode disturbance observer(ESMDO)is designed to estimate the uncertainty of the system.Finally,compared with both the PI control and sliding mode control(SMC)by simulations and experiments with different working conditions,the method proposed has the merits of accelerating convergence,improving steady-state accuracy,and minimizing the current and torque pulsation.

Reform and Practice of Talent Training of Architectural Interior Design Professionals in Higher Vocational Skills Competition: Taking Chongqing Energy Vocational College as an Example

For higher vocational colleges,skills competition is an important indicator of professional personnel training quality.In this paper,the architectural interior design professional skills competition in Chongqing Energy Vocational College is taken as an example,the many years of teaching and competition experience are taken into account,the problems existing in the cultivation of architectural interior design professionals in higher vocational colleges are analyzed,and corresponding solutions are proposed.

基于场所精神的建筑室内空间设计研究

人与场所交互对话方式是近年来设计者研究的主要方向。建筑室内空间作为人们物质和精神生活的场所,传递着一种生活方式的态度。建筑室内空间的场所精神,映射出社会环境与生产方式多维度空间行为体验逻辑价值认同的特定意义。文章结合场所精神的行为体验研究,通过对“人”的需求尊重来诠释建筑室内空间场所设计的“内在精神气质”,强化人与环境互动的双向作用生成,实现场所空间营造内在价值的有效途径。

Research on the Interior Decoration Characteristics of Peking Union Medical College Phase I Project

Peking Union Medical College was founded in the late Qing Dynasty and the early Republic of China.Since then,society and politics have been rapidly changing,and its architectural aesthetics reflect the idea of advocating the West and inheriting tradition.Through research and actual investigation,this paper summarizes the current status of its building from two aspects,interior decoration art and interior decoration technology,analyzes the interior decoration characteristics of Peking Union Medical College Phase I Project,and records the archives of Peking Union Medical College’s decoration technology.

Ideological and Political Integration Strategies in Interior Design Professional Courses Under the Background of Innovation and Entrepreneurship

Based on the ideological and political requirements of interior design professional courses,exploring the integrated education path of professional plus innovation and entrepreneurship requires first expanding the ideological and political content of professional introductory courses,core courses,and expanded courses.Then,we will reshape the curriculum system based on the principle of connecting professional teaching and ideological and political courses,focusing on the realistic principle of talent needs,striving for student growth,adjusting the course content,optimizing the teaching model,and transforming teaching through in-and out-of-class practice and counterpoint guidance.

基于川南建筑特色的会馆室内装饰设计研究——以夕佳山民居为例

以夕佳山民居为代表的川南建筑具有独特的地域特色,其装饰元素往往具有平安吉祥、多福健康等美好寓意,代表着人们对美好生活的向往。对其地域文化和建筑艺术特征进行了分析叙述,将具有地域特色的夕佳山传统民居建筑元素和会馆室内设计相结合,从形、色、材几个方面进行装饰方法探讨。在设计应用中,根据会馆的文化属性,从消费者的实际需求出发,注重不脱离装饰外形所依附的内在文化和内在精神价值,利用新材料新技术作为突破点,以传承和创新两个方向探讨结合的设计策略,在会馆室内设计中传承创新川南地域文化。

Teaching Strategy of Higher Vocational Interior Design Based on “Internet Plus” Thinking

“Internet Plus”thinking has been widely adopted in the teaching of interior design in colleges and universities,and its application has significant implications that cannot be disregarded.“Internet Plus”thinking not only realizes the innovation of interior design teaching but also significantly improves the level and quality of teaching.Through an analysis of the advantages of“Internet Plus”education platform and the current situation of higher vocational interior design teaching,effective strategies for higher vocational interior design teaching based on“Internet Plus”thinking are proposed in this paper in hope that this study will contribute to the efficient development of interior design teaching activities.

地域文化影响下的乡村民宿室内设计探析

随着社会经济的飞快发展,人们的生活水平越来越高,对待生活的态度也随之转变。在此背景下,具有地域文化特色的休闲度假游备受人们青睐。乡村民宿设计作为展示地域文化的载体,承担着传播地域文化的责任和使命,在其室内设计中表达地域文化则尤为重要。因此,文章以地域文化为切入点,综合考虑乡村民宿室内设计的需求,探究两者之间的关系,不仅能够切实有效地满足游客的体验性需求,提升游客的满意度,又有利于地域文化的传承,同时还可以提高乡村民宿室内设计的文化底蕴。

杨燕教授从肺论治儿童功能性便秘的临床经验

儿童功能性便秘约占小儿便秘的95%以上,是小儿消化系统的常见病,病程迁延易对儿童的身心健康产生严重影响。文章总结杨燕教授治疗儿童功能性便秘的临床经验。杨燕教授认为便秘的病机主要是大肠的传导功能失常,但与肺脏密切相关。肺与大肠相表里,肺气亏虚或肺气郁闭,宣肃失职,气机不畅,津液疏布失常,肺热移于大肠,肠失濡润,均可导致便秘发生。从肺论治,临证采用塞因塞用之法补气启闭治虚秘,提壶揭盖之法理肺通腑治实秘,同时重视良好的饮食结构及日常护理,临床疗效显著。附验案1则以佐证。

居家养老模式下室内空间适老化改造

为了提升老年人生活的安全性、舒适度,解决养老困难问题。通过居家养老模式的背景调研,表明居家养老是最适宜我国国情的养老模式。并结合室内空间适老化改造设计存在的问题,总结了室内空间适老化设计的策略和建议,归纳了室内通行空间、生活空间和辅助空间的适老化设计要点。为居家养老模式适老化改造设计提供了参考。

基于凸空间分析法的浙南丽水明清时期民居空间形态研究

浙江民居年代久远,蕴含着丰富的历史信息与地域文化。选取浙南丽水地区的缙云县河阳村循规映月、莲都区西溪村山川环拱、松阳县石仓村乐善堂三处民居作为研究对象。利用空间句法理论的凸空间分析法以及基于Depthamp软件的整合度、选择度、连接值与总深度值四个指标,定量分析丽水民居空间形态的成因。通过拓扑模型分析可知堂屋在浙南民居空间布局中处于核心位置,其空间形态深受儒家礼制文化和宗法制度的影响,弄和檐廊在浙南民居中作为主要的交通流线起到了空间关系组织的作用。

室内与家具设计人才实践教学方法探讨

室内与家具设计是集技术、美学与社会科学的综合性学科。设计实践教学作为高校教学工作的重要环节,对提升学生的专业技能、深化课堂教学内容有着重要意义。目前我国高校的创新人才培养方案在教学思维、教学内容、教学实践等方面还不够完善,教学改革缺乏前瞻性和系统性、人才培养评价体系过于片面、创新人才培养资源支撑不足、人才培养方案缺乏深度跟进,还未形成科学发展的长效机制。因此以深化室内与家具设计专业实践教学改革创新为主线,结合室内与家具设计专业教学现状,分析现阶段人才培养模式的发展路径,提出适用于室内与家具设计专业的实践教学方法尤为必要,从而为新文科背景下培养具有设计创新能力的卓越型人才提供新指南。

基于“心肠合治法”论乌梅丸

“心肠合治法”理论起源可追溯至《黄帝内经》,阐释了心与小肠在生理和病理上的相互影响,近年来,研究者多从“颅脑肠脑说”“心与肠道菌群说”“肠道菌群-脑-肠轴”等方面进行研究,证实了“心与小肠相表里”学说的科学性,从而也证明了“心肠合治法”在临床中的可行性、重要性。该文中“心”即心、脑、血脉,包括现代医学中的心血管系统、神经系统等,“肠”即小肠,包括消化系统中的十二指肠、空肠、回肠等。“心肠合治法”是一种很重要但未被重视起来的治疗思路,而乌梅丸即“心肠合治法”的代表方剂,在临床中常被用来治疗心系与肠系病。故该文就“心肠合治法”理论渊源、现代研究机制及其临床运用的研究概况进行探讨,以期从更多角度探究乌梅丸的配伍规律及临床应用。

基于ADE优化的IPMSM全速域无传感器控制

为了实现内置式永磁同步电机(IPMSM)全速域的无传感器控制和切换速域的平滑过渡,提出了一种基于自适应差分进化(ADE)算法优化的复合控制方法。分别在零低速域、中高速域采用旋转高频电压注入法和滑模观测器法来对电机转速和转子位置进行估算,并在切换速域采用基于ADE算法的权重系数优化法来实现上述两种控制方法的平滑切换,从而实现IPMSM全速域无传感器控制。仿真结果表明:提出的复合控制方法能够实现电机全速域的无感控制和切换速域的平滑过渡,且具有良好的稳定性。

采用生理响度感知机制的车内噪声声品质预测

现有车内噪声声品质预测的响度计算中没有考虑真实人耳生理解剖结构的传声特性,因此提出了一种基于生理响度感知模型的车内噪声声品质预估方法。首先,采集两款轿车的车内噪声样本,并通过主观评价试验得到车内噪声的主观评价烦恼度。之后,整合中耳集总参数模型与耳蜗传输线模型,构建生理响度模型。然后,以生理响度模型的响度计算值为主要参数,结合尖锐度、粗糙度与车内噪声的主观评价值,通过TabNet模型构建了车辆声品质预测模型。最终,对比分析了所构建声品质模型与基于现有标准响度模型所构建的声品质模型的预测效果。结果表明,采用生理响度模型的声品质预测平均误差百分比仅有4.73%,优于采用Moore响度(6.13%)与Zwicker响度(6.94%)的声品质预测结果。此外,所构建的TabNet声品质预测模型的平均误差百分比也低于基于BP神经网络模型的平均误差百分比(7.60%)。采用生理响度模型的TabNet声品质预测能够提高车内噪声声品质客观评价的准确率。