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A developed surrogate-based optimization framework combining HDMR-based modeling technique and TLBO algorithm for high-dimensional engineering problems
The traditional surrogate-based optimization techniques are facing severe challenges for high-dimensional engineering optimization problems. The main challenges are how to overcome metamodeling and optimization difficulties in high-dimensional design space. To solve the above difficulties, a developed surrogate-based optimization framework combining high-dimensional model representation (HDMR)-based modeling technique and teaching-learning-based optimization (TLBO) algorithm is developed. A high-dimensional model can be decomposed into a series of low-dimensional models by HDMR-based modeling technique, which can greatly reduce the difficulty of building high-dimensional model. The TLBO algorithm which has strong optimization ability and non-parameter setting characteristic is introduced to optimize the HDMR-based model to overcome the difficulty of optimization. Several representative functions are selected as examples to verify the developed optimization method for high-dimensional problems. In addition, The developed surrogate-based optimization is applied to solve a typical engineering optimization problem: high-dimensional aerodynamic shape optimization. It can be concluded that the optimization ability of the traditional surrogate-based optimization framework can be improved with assistance of HDMR-based modeling technique and TLBO algorithm for high-dimensional engineering problems.
Journal Article
Learn Autodesk Inventor 2018 basics : 3D modeling, 2D graphics, and assembly design
\"Get started with the basics of part modeling, assembly modeling, presentations, and drawings in this step-by-step tutorial on Autodesk Inventor fundamentals. Next, this book teaches you some intermediate-level topics such as additional part modeling tools, sheet metal modeling, top-down assembly features, assembly joints, and dimension and annotations. Engaging explanations, practical examples, and step-by-step instructions make this tutorial book complete. Once you have read Learn Autodesk Inventor 2018 Basics you will be able to use Autodesk Inventor for 3D modeling, 2D drawings, finite element analysis, mold design, and other purposes, just like a design professional. You will gain all the basic information and essential skills you need to work in Autodesk Inventor immediately. You will: Carry out virtual 3D modeling for your next 3D printing projects Design molds for 3D printing and other projects Generate 2D drawings Apply basic finite element analysis for figuring stress, tension, and optimized dimensions for your 3D printing projects\"--Page [4] of cover.
Book
From 0D to 2D: Dimensional Tuning of Structural and Optoelectronic Properties of Pt Halide Perovskites
Platinum halide perovskites offer an environmentally friendly alternative to lead halide perovskites, demonstrating remarkable stability and optoelectronic properties. Here, the impact of dimensional engineering on optoelectronic properties of platinum halide perovskites, specifically 2D CsPtI3(DMSO) CsPtI₃(DMSO)and 0D Cs2PtI6 Cs₂PtI₆ , has been explored. The 2D CsPtI3(DMSO) CsPtI₃(DMSO)phase shows p‐type behavior and exhibits significant Stokes shift with broad emission around 850 nm. Strong short‐range electron–phonon (EP) coupling in the layered 2D structure results in self‐trapped excitonic emission as confirmed by low emission lifetime and Huang–Rhys factor of S = 16.8. In contrast, in this study, 0D Cs2PtI6 Cs₂PtI₆exhibits n‐type behavior and no significant emissions under laser excitation, attributed to short‐range EP coupling leading to nonradiative recombination. Additionally, the Cs2PtI6/Pt Cs₂PtI₆/Ptmixed phase resulting from thermal decomposition of 2D CsPtI3(DMSO) CsPtI₃(DMSO)behaves as a p‐type semiconductor. This observation aligns with first principles simulations, which suggest that low formation energy Pt interstitial defects in Cs2PtI6 Cs₂PtI₆ will tune the pristine n‐type Cs2PtI6 Cs₂PtI₆ into a slightly p‐type conductivity. These findings underscore the profound influence of dimensional engineering on the properties of platinum halide perovskites, offering valuable insights for developing stable and environmentally friendly perovskite materials for advanced optoelectronic applications. The influence of dimensional engineering on the structural and optoelectronic properties of platinum halide perovskites, namely 0D Cs2PtI6 and 2D CsPtI3(DMSO), was investigated. Significant differences were indicated between the two configurations, particularly in their emission properties and electron‐phonon interactions.
Journal Article
Mastering 3D printing in the classroom, library, and lab
Learn how to manage and integrate the technology of 3D printers in the classroom, library, and lab. With this book, the authors give practical, lessons-learned advice about the nuts and bolts of what happens when you mix 3D printers, teachers, students, and the general public in environments ranging from K-12 and university classrooms to libraries, museums, and after-school community programs. Take your existing programs to the next level with Mastering 3D Printing in the Classroom, Library, and Lab. Organized in a way that is readable and easy to understand, this book is your guide to the many technology options available now in both software and hardware, as well as a compendium of practical use cases and a discussion of how to create experiences that will align with curriculum standards. You'll examine the whole range of working with a 3D printer, from purchase decision to curriculum design. Finally this book points you forward to the digital-fabrication future current students will face, discussing how key skills can be taught as cost-effectively as possible.--Back cover.
Book
From a Systematic Literature Review to a Classification Framework: Sustainability Integration in Fashion Operations
Sustainability management in global fashion operations is an area of growing concern. This can be seen by the number of research articles and industrial reports published. To establish a further debate, this study pursues two objectives. Firstly, it provides a systematic literature review pertaining to environmental and social sustainability management in fashion operations by encompassing 38 research articles indexed in Scopus from 2006 to 2016. Secondly, it presents a classification framework in which sustainability practices are categorized according to a three-dimensional concurrent engineering framework by focusing on product, process and supply chain levels. Results address that the breakdown of environmental and social sustainability practices identified in earlier research is not homogenous. For instance, some critical social aspects such as human rights are not widely covered in production processes. Similarly, serious environmental aspects such as biodiversity are not entirely focused on at the chain level. Last, this study concludes with a framework illustrating strategic priorities to be taken to advance sustainability in fashion operations.
Journal Article
Architectural design with SketchUp : 3D modeling, extensions, BIM, rendering, making, and scripting
The one-stop guide to SketchUp for architects, designers, and builders. SketchUp is the tool of choice for architects, interior designers, and construction professionals. Though the basics are simple to understand, getting the most out of it requires deeper instruction and guidance.
Book
Dimensional engineering of covalent organic frameworks derived carbons for electrocatalytic carbon dioxide reduction
Covalent organic frameworks (COFs) have been developed as the precursors to construct porous carbons for electrocatalytic systems. However, the influences of carbon dimensions on the catalytic performance are still underexplored. In this work, we have first constructed COF‐derived carbons by template‐synthesis strategy in different dimensions to catalyze the carbon dioxide reduction (CO2RR). By using different templates, the one‐dimensional (1D), two‐dimensional (2D), and three‐dimensional (3D) COF‐derived carbons have been employed to anchor Co‐porphyrin to form the Co‐N5 sites to catalyze CO2RR. The 1D catalyst templated by carbon nano tubes presents high binding ability of CO2, more defective sites, and higher electronic conductivity, resulting in a higher catalytic activity for CO2 and selectivity of CO than 2D and 3D carbon‐based catalysts. The 1D catalyst delivers the turnover frequency values of 1150 h−1 and the FECO of 94.5% at 0.7 V versus RHE, which is significantly better than those of 2D and 3D carbon‐based catalysts. The COF‐based 1D catalyst presented high binding ability of CO2, more defective sites, and high electronic conductivity, leading to higher CO2RR activity and CO selectivity than the 2D and 3D catalysts. This work provides a new insight into the development of efficient COF‐based catalysts.
Journal Article
A beginner's guide to 3D modeling : a guide to Autodesk Fusion 360
\"A practical guide to 3D CAD modeling. Begins with the principles of parametric modeling and assembly methods, and then moves on to advanced modeling concepts such as 3D sketching and splines, helixes and ribs, technical drawing, and rendering.\" -- Provided by publisher.
Book
Challenges and Opportunities for the Blue Perovskite Quantum Dot Light-Emitting Diodes
Perovskite quantum dots (PQDs), as the promising materials for the blue light-emitting diodes (LEDs), own huge advantages as ultra-high color purity, flexibility and whole-spectrum tunability. Through dimensional and compositional engineering, PQD-LEDs have shown superiority in deep-blue light emission. However, compared with the fast development of red and green PeLEDs, the electroluminescent performance of PQD-LEDs has faced more obstacles. In this review, we aim to explore and state the uniqueness and the possible solutions for the bottleneck problems of the PQD-LEDs.
Journal Article