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.

Fault Interior Structure Index Construction and Quantitative Seismic Interpretation of Fault Facies

Fault zones have always drawn attention from the industry,and the performance of a quantitative interpretation of the fault interior structure on seismic data has remained as a big challenge.In this work,we focus on quantitatively populating the heterogeneity of the fault interior structure in a three-dimensional space on seismic data.To realize this goal,we take the South Wuerxun sub-depression in Hailar Basin as an example of a faulted basin.First,based on a heterogeneity analysis using the drilling and logging information from wells,we establish fault zone geologic models and perform seismic forward modeling to determine the relationship between different fault zone models with different fault dips,internal fillings,and P wave responses.Next,the fault interior structure index(FIS)is constructed,and the response features on the FIS from the fault facies and the host rock are observed.Finally,the FIS is applied to perform the quantitative interpretation and prediction of the heterogeneity in the FIS on seismic data.The results show that the FIS response from the fault zone is higher than that of the host rock in plane,indicating that the former is quantitatively separated from the surrounding host rocks.The FIS values greater than 26 represent the feedback from the fault facies,whereas those less than 26 represent the response from the host rocks.The FIS shows segmented features in the strike,banded in dip on plane.On the slip surface,the FIS indicates the shale smear zone and the location where low-graded and small-scaled faults are densely developed.The heterogeneity prediction result is proven by oil and gas exploration activities.The study results imply that the FIS could indicate a favorable path of the hydrocarbon migration in the fault zone and evaluate the fault sealing parts.The method can explore the quantitative characterization of fault facies and has essential popularization and application values in similar geological application fields,including hydrocarbon exploration,development of faulted reservoirs,and geological engineering evaluation related to faults.

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.

A Sound Quality Evaluation Method for Vehicle Interior Noise Based on Auditory Loudness Model

When designing and optimizing the hull of vehicles,their sound quality needs to be considered,which greatly depends on the psychoacoustic parameters.However,the traditional psychoacoustic calculation method does not consider the influence of the real human ear anatomic structure,even the loudness which is most related to the auditory periphery.In order to introduce the real physiological structure of the human ear into the evaluation of vehicle sound quality,this paper first carried out the vehicle internal noise test to obtain the experimental samples.Then,the physiological loudness was predicted based on an established human ear physiological model,and the noise evaluation vector was constructed by combining the remaining four psychoacoustic parameters.Finally,the evaluation vector was fitted into the subjective evaluation results of vehicle interior noise by a deep neural network.The results show that our proposed method can estimate the human subjective perception of vehicle interior noise well.

Heimtextil expands product range and makes textile interior design more visible than ever before

From 14 to 17 January,2025 already 2,900 exhibitors from 60 countries will present current trends,the latest collections,innovative materials and textile solutions at Heimtextil.High-calibre highlights await visitors:For the first time,the Milanbased design platform Alcova will curate the Heimtextil Trends 25/26.In addition,the worldwide renowned designer and architect Patricia Urquiola brings textile design to life in the exclusive installation‘among-us’.

How smart textiles are transforming home interiors

As smart homes become more integrated with daily life,one area of innovation that’s gaining momentum is smart textiles.Historically,fabrics in home design were mostly about aesthetics,adding color,texture,and comfort to living spaces.But today,these materials are evolving,incorporating advanced technology to not only elevate visual appeal but also improve home functionality.Smart textiles are offering new ways to optimize energy efficiency,health,safety,and personalization,reshaping how we approach interior design.These fabrics are blurring the lines between decor and technology,making homes smarter and more efficient.

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.

Study of the Interior Design Based on Elderly People’s Psychological Behaviors and Requirements

Nowadays,the elderly have become an increasingly large group of people in China,but still many problems exist in their living space.This paper explores the physiological and psychological behavioral changes of the elderly,studies their living space requirements,and tries to put forward targeted design strategies in response.Therefore,making a better and more reasonable living space for the elderly as well as improving their living quality,finally helping the development of elderly-friendly design in China.

Application Research of Virtual Simulation Technology in Interior Design Teaching

Virtual simulation technology is the integration of virtual reality technology and augmented reality technology, with intuitionistic, practical and experiential, it can fully meet the needs of different scenes and operation needs of interior design course teaching, and provide students with a full sense of immersion, independent operation and exploration of open space. The fundamental purpose of this study on the application of virtual simulation technology in interior design course teaching is to promote the modernization of interior design course teaching and improve the efficiency of teaching. This paper briefly expounds the concept of virtual simulation technology and interior design course, analyzes the limitations and shortcomings of interior design course teaching and implementation, and discusses the advantages of its application in interior design course from the technical point of view. Finally, the paper puts forward three application steps of virtual simulation technology in interior design course teaching and puts forward the implementation strategy of applying technology to carry out teaching based on the perspective of students, in order to provide valuable reference for the modernization of interior design course teaching.

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.

Design and Application of Modern Interior Design Style System Based on Unity3D

With the constant change of fashion trends,interior design styles are changing day by day.Based on Unity3D technology,this paper develops a system for modern interior-style design and application.Taking the residential interior as a case study,the interior style design is achieved through 3D modeling and texture rendering and then combined with the Unity3D engine to achieve scene roaming and interactive design.The system enables designers to express design concepts more intuitively and efficiently and also improves customer participation and satisfaction.Through the experience of designers and customers,the system is verified to have more practical value than traditional interior design solutions.

职业院校室内设计教育的财经素养整合

职业院校在室内设计专业与财经素养整合的这一路径,能够帮助学生提高专业技能水平,培养创新思维,让学生具备良好的金融抗风险能力,从而满足社会对高质量人才的迫切需求。不仅如此,职业院校学生能够更加清晰个人职业发展路径,不断提高自身专业能力以及财经素养,从而进一步强化社会竞争能力,为更好地融入社会职场环境打下坚实基础。

基于改进趋近律的IPMSM滑模NDOB调速控制

内置式永磁同步电机(interior permanent magnet synchronous motor,IPMSM)调速系统中的传统滑模控制存在抖振严重、响应速度慢和抗扰能力差等问题。为了增强IPMSM调速系统的控制性能,提出了一种基于改进双幂次趋近律与非线性扰动观测器(nonlinear disturbance observer,NDOB)的滑模控制方法。改进双幂次趋近律通过在幂次项引入系统状态变量,使趋近律具有变速趋近特性,解决了滑模趋近速度和抖振抑制间的矛盾。为了进一步增强系统的鲁棒性,设计了NDOB,该观测器不仅可以对扰动进行补偿,还可以通过减小趋近律增益系数进一步抑制系统抖振。仿真结果验证了所提方法的有效性和可行性。

基于CFD仿真模拟的工业建筑室内风环境研究——以黄石市华新水泥厂为例

随着众多工业园区搬迁、废弃,关于工业旧址的建筑改造升级成为当下热点。众多研究表明改善建筑室内风环境能够有效降低建筑能耗,提高人体舒适度,提升建筑品质。文章通过CFD仿真模拟,模拟华新水泥厂内部风环境情形,并分析在夏季工况下,1.5 m高度时四种内部空间形式的建筑方案室内风环境情况,并选定最佳形式,为今后在工业建筑室内风环境研究设计方面提供一些思路。

Cluster Warhead Dispersing Technique and Its Interior Ballistic Calculation

Cluster warhead dispersing technique is analyzed with gas dynamic theory. It is seen that the front cover opening and two stage dispersing system is suitable for guided sub missiles whose number is not so large. The interior ballistic performances of this system are calculated with numerical calculation method. The performances such as the pressure in the pressure chambers and the velocity of the sub missiles are obtained in curve form.

The Application of Landscape Plants in Humanized Interior Environmental Design

Landscape plants play a role of decorating and beautifying the indoor environment.From the perspective of humanization,the functions and application patterns of landscape plants in the interior environmental design are analyzed in this study,and finally the application rules of landscape plants in the humanized interior environmental design are summarized.

Primary Study on the Artistic Value of Interior Decoration of Ancient Huizhou Folk Houses

From the creation,materials,colors and technical artistic characteristics of exterior and exterior spatial decoration,the artistic value of ancient Huizhou folk houses were analyzed.

Enlightenment of Modern Interior Design from the Interior Decoration of Ancient Huizhou Vernacular Dwellings

Through analyzing the basic structure of ancient Huizhou vernacular dwellings and the spatial order of interior decoration,this study rethought profoundly about modern interior design and put forward the inheritance of traditional methods in interior decoration.

钝感高能硝胺发射药内弹道性能的预测

为了分析钝感高能硝胺发射药内弹道性能的影响因素,基于密闭爆发器试验和14.5 mm弹道测试构建了高能硝胺发射药的内弹道模型,采用粒子群算法拟合了模型修正系数,进而基于模型理论计算分析了燃烧渐增性因子Pr及装药量ω对弹丸初速V_(0)和最大膛压p_(m)的影响。结果表明:基于经典内弹道理论预测高能硝胺发射药动态燃烧特性时,需考虑燃速修正系数χ和火药力利用系数η。与静态燃烧相比,动态燃烧的等效燃速相对增长可超过10%。同时,由于能量耗散的影响,理论计算中仅80%左右的火药力可有效转换为弹丸动能。发射药内弹道性能受Pr、ω、χ和η的耦合影响。作为主要机制,发射药静态燃烧性能和装药量显著影响着内弹道性能;V_(0)和ω线性正相关,p_(m)可表征为ω的指数函数;Pr决定了不同关联式中的系数。然而,在不同工艺条件下,χ和η的波动使内弹道性能变化,增大了拟合关联式的预测偏差。

基于无人搭载平台的钢箱梁内表面涂层病害及螺栓缺陷自动检测技术研究

针对钢箱梁内表面典型涂层病害及螺栓缺陷难以被快速感知、识别的问题,研发了具有一定普适性的大刚度多级折叠机械臂轨道机器人。基于涂层的典型病害分类、病害影响权重和涂层劣化等级评定,搭建了典型病害识别专家决策系统,并训练了多尺度感受野网络。基于计算机视觉与深度学习技术提出了一种螺栓丢失与松动缺陷鲁棒性检测方法。结果表明:钢箱梁内表面涂层病害识别准确率为97%,分类准确率为90.3%;螺栓丢失缺陷识别准确率为99.0%,螺栓松动缺陷识别准确率为99.7%,螺栓缺陷检测时,透视拍摄角度不大于40°可减少对螺栓松紧度的误判。无人搭载平台的轨道机器人实现了对钢箱梁内表面涂层病害及螺栓缺陷的快速、高精度智能巡检。