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Topology optimization of differentiable microstructures

Zhai, X. (author), Wang, Weiming (author), Chen, Falai (author), Wu, J. (author)

Recent years have seen a growing interest in topology optimization of functionally graded microstructures, characterized by an array of microstructures with varying volume fractions. However, microstructures optimized at slightly different volume fractions do not necessarily connect well when placed adjacently. Furthermore, optimization is...

journal article 2024

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Structural Optimization of Uniform Strength Noise Barrier

Chen, Chia Yu (author)

Traditional approaches to noise barrier design often rely on outdated techniques and resource-intensive materials like concrete and steel. However, with sustainability gaining prominence, aligning noise barrier design with green construction principles becomes crucial. Structural optimization, aimed at minimizing material usage, emerges as a...

master thesis 2023

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To Redefine, Not Reinforce: A Spatial Decision Support System with Generative Design Model for Exploring Optimal Improvements to Existing Street Networks for Enhancing Equity of Accessibility

Chen, Wen-Yu (author)

Transport decision-making determines people’s level of accessibility and deeply influences an individual’s access to social and economic opportunities and the quality of life. Socially vulnerable populations are highly dependent on yet often more likely to have less access to transport services and experience lower accessibility. This creates...

master thesis 2023

document

Thermomechanical Oriented Reliability Enhancement of Si MOSFET Panel-Level Packaging Fusing Ant Colony Optimization With Backpropagation Neural Network

Jiang, Jing (author), Chen, Wei (author), Qian, Yichen (author), Meda, Abdulmelik H. (author), Fan, X. (author), Zhang, Kouchi (author), Fan, J. (author)

Considerable advancements in power semiconductor devices have resulted in such devices being increasingly adopted in applications of energy generation, conversion, and transmission. Hence, we proposed a fan-out panel-level packaging (FOPLP) design for 30-V Si-based metal-oxide-semiconductor field-effect transistor (MOSFET). To achieve...

journal article 2023

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Coordination and Optimization Control Framework for Vessels Platooning in Inland Waterborne Transportation System

Tao, W. (author), Zhu, Man (author), Chen, Shengyong (author), Cheng, Xu (author), Wen, Yuanqiao (author), Zhang, Weidong (author), Negenborn, R.R. (author), Pang, Y. (author)

Vessels sailing in a single platoon could reduce resistance from the perspective of the whole platoon and the individual vessel, and contribute to improving energy benefits. Moreover, transportation energy costs and traffic efficiency are essential indicators for measuring waterborne transportation systems. We attempt to minimize...

journal article 2023

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A Symbolic Approach to Discrete Structural Optimization Using Quantum Annealing

Wils, K.A. (author), Chen, B. Y. (author)

With the advent of novel quantum computing technologies and the new possibilities thereby offered, a prime opportunity has presented itself to investigate the practical application of quantum computing. This work investigates the feasibility of using quantum annealing for structural optimization. The target problem is the discrete truss sizing...

journal article 2023

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Thermal-mechanical-electrical Co-design of Fan-Out Panel-Level SiC MOSFET Packaging with a Multi-objective Optimization Algorithm

Chen, Wei (author), Yan, Xuyang (author), Ibrahim, Mesfin S. (author), Meda, Abdulmelik H. (author), Fan, X. (author), Zhang, Kouchi (author), Fan, J. (author)

As the next generation of semiconductor devices, SiC MOSFETs have demonstrated significant performance improvements in switching loss, switching frequency, and high-temperature operation compared to Si-based MOSFETs. However, the long-term reliability of such devices and their packaging continues to be a major concern. Towards addressing this...

conference paper 2023

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Optimization of firefighting strategies in process plants with emphasis on domino effects and safe evacuation

Khakzad, Nima (author), Chen, Chao (author), Reniers, G.L.L.M.E. (author), Amyotte, Paul (author)

Effective firefighting and evacuation are integral parts of emergency response plans in process plants, which play a key role in protecting human lives and assets in the event of major fires. Given sufficient firefighting resources, firefighters would suppress all the burning vessels and cool off all the exposed vessels in order to contain the...

journal article 2023

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Reliability testing for product return prediction

Zhao, Xiujie (author), Chen, P. (author), Lv, Shanshan (author), He, Zhen (author)

Return of products within the warranty coverage induces additional cost and loss of reputation to manufacturers. It is of practical interest to predict the return rate by experimental means before introducing a product to the market. In this paper, we propose to optimize accelerated reliability tests to achieve the goal within limited time....

journal article 2023

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Overheating control in additive manufacturing using a 3D topology optimization method and experimental validation

Ranjan, R. (author), Chen, Z. (author), Ayas, C. (author), Langelaar, Matthijs (author), van Keulen, A. (author)

Overheating is a major issue especially in metal Additive Manufacturing (AM) processes, leading to poor surface quality, lack of dimensional precision, inferior performance and/or build failures. A 3D density-based topology optimization (TO) method is presented which addresses the issue of local overheating during metal AM. This is achieved...

journal article 2023

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Multi-agent Planning and Coordination for Automated Aircraft Ground Handling

Chen, Szu-Tung (author)

Inspired by the vision of fully autonomous airside operations at Schiphol airport, this study aims to contribute to the short-term goal of automated aircraft ground handling. In this research, we design and evaluate a multi-agent system for planning of automated ground handling. There are two main components in the system, task allocation...

master thesis 2022

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Platform Development of BIM-Based Fire Safety Management System Considering the Construction Site

Yang, Yapin (author), Sun, Ying (author), Chen, Mingsi (author), Zhou, Yuekuan (author), Wang, Ran (author), Liu, Zhengxuan (author)

Fire at a construction site usually results in serious accidents. Therefore, fire management at the construction site is critical to decreasing possible accidents. However, conventional fire safety management can be problematic in many aspects, such as visualization, multi-stage alarm systems, and dynamic escape route optimization. To solve...

journal article 2022

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Large Region Targets Observation Scheduling by Multiple Satellites Using Resampling Particle Swarm Optimization

Gu, Yi (author), Han, Chao (author), Chen, Yuhan (author), Liu, Shenggang (author), Wang, X. (author)

The last decades have witnessed a rapid increase of Earth observation satellites (EOSs), leading to the increasing complexity of EOSs scheduling. On account of the widespread applications of large region observation, this article aims to address the EOSs observation scheduling problem for large region targets. A rapid coverage calculation...

journal article 2022

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Genetic Algorithm–Assisted Design of Redistribution Layer Vias for a Fan-Out Panel-Level SiC MOSFET Power Module Packaging

Fan, Jiajie (author), Qian, Yichen (author), Chen, Wei (author), Jiang, Jing (author), Tang, Zhuorui (author), Fan, Xuejun (author), Zhang, Kouchi (author)

A fan-out panel-level packaging (FOPLP) with an embedded redistribution layer (RDL) via interconnection reduces the size, thermal resistance, and parasitic inductance of power module packaging. In this study, the effect of the RDL via size on the reliability of a FOPLP SiC MOSFET power module was investigated. To improve the thermal management...

conference paper 2022

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Safety-oriented planning of expressway truck service areas based on driver demand

Ding, Wenlong (author), Wang, Y. (author), Chu, Pengzi (author), Chen, Feng (author), Song, Yongchao (author), Zhang, Ning (author), Lin, Dong (author)

The rapid development of the economy has promoted the growth of freight transportation. The truck service areas on expressways, as the main places for truck drivers to rest, play an important role in ensuring the driving safety of trucks. If these service areas are constructed densely or provide a plentiful supply of parking areas, they are...

journal article 2022

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SGD_Tucker: A Novel Stochastic Optimization Strategy for Parallel Sparse Tucker Decomposition

Li, H. (author), Li, Zixuan (author), Li, Kenli (author), Rellermeyer, Jan S. (author), Chen, Lydia Y. (author), Li, Keqin (author)

Sparse Tucker Decomposition (STD) algorithms learn a core tensor and a group of factor matrices to obtain an optimal low-rank representation feature for the High-Order, High-Dimension, and Sparse Tensor (HOHDST). However, existing STD algorithms face the problem of intermediate variables explosion which results from the fact that the...

journal article 2021

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Online label aggregation: A variational bayesian approach

Hong, C. (author), Ghiassi, S. (author), Zhou, Yichi (author), Birke, Robert (author), Chen, Lydia Y. (author)

Noisy labeled data is more a norm than a rarity for crowd sourced contents. It is effective to distill noise and infer correct labels through aggregating results from crowd workers. To ensure the time relevance and overcome slow responses of workers, online label aggregation is increasingly requested, calling for solutions that can...

conference paper 2021

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Alternating optimization of design and stress for stress-constrained topology optimization

Zhai, X. (author), Chen, Falai (author), Wu, J. (author)

Handling stress constraints is an important topic in topology optimization. In this paper, we introduce an interpretation of stresses as optimization variables, leading to an augmented Lagrangian formulation. This formulation takes two sets of optimization variables, i.e., an auxiliary stress variable per element, in addition to a density...

journal article 2021

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Relocating operational and damaged bikes in free-floating systems: A data-driven modeling framework for level of service enhancement

Chang, Ximing (author), Wu, Jianjun (author), Sun, Huijun (author), Correia, Gonçalo (author), Chen, JianHua (author)

Free-floating bike sharing is an innovative and sustainable travel mode, where shared bikes can be picked up and returned at any proper place on the streets and not just at docking stations. Nevertheless, in these systems, two major problems arise. One is the imbalance of free-floating shared bikes (FFSB) between zones due to one-way trips,...

journal article 2021

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Robust Signal Control of Exit Lanes for Left-Turn Intersections with the Consideration of Traffic Fluctuation

Chen, Kaijia (author), Zhao, J. (author), Knoop, V.L. (author), Gao, Xing (author)

Traffic throughput at intersections can be improved by using exit lanes for left-turning (EFL), tidal flow lanes near an intersection, which has been recently introduced. This paper considers the operational robustness of the EFL intersection in relation to the control scheme applied to the traffic light setting. For safety and efficiency, it...

journal article 2020