Results 31 to 40 of about 13,966 (122)

Investigation on Designing and Development of a Selective Laser Melting Manufactured Gas Turbine Blade—Proof-of-Concept

Inventions
In this study, a conceptual turbine blade model with internal cooling channels was designed and fabricated using the selective laser melting (SLM) process. The optimal manufacturing orientation was evaluated through simulations, and the results indicated
Mihaela Raluca Condruz, Tiberius Florian Frigioescu, Gheorghe Matache, Adina Cristina Toma, Teodor Adrian Badea   +4 more
doaj   +1 more source

Additive manufacturing-by-design for support structures: a critical review

International Journal of Extreme Manufacturing
Support structure, a critical component in the design for additive manufacturing (DfAM), has been largely overlooked by additive manufacturing (AM) communities.
Jinlong Su, Yang Mo, Peijie Shangguan, Chinnapat Panwisawas, Fulin Jiang, Swee Leong Sing   +5 more
doaj   +1 more source

Analysis of Noise Propagation Mechanisms in Wireless Optical Coherent Communication Systems

Applied Sciences
This paper systematically analyzes the propagation, transformation, and accumulation mechanisms of multi-source noise and device non-idealities within the complete signal chain from the transmitter through the channel to the receiver, focusing on ...
Fan Ji, Xizheng Ke
doaj   +1 more source

Digital manufacturing of personalized magnesium implants through binder jet additive manufacturing and automated post machining

Journal of Magnesium and Alloys
While magnesium (Mg) is a promising material for personalized temporary implants, the lack of a digital manufacturing solution for Mg implants impedes its potential progress. This study introduces a hybrid manufacturing process that integrates binder jet
Mojtaba Salehi, Dennis Wee Keong Neo, Viktor Rudel, Marc Stautner, Philipp Ganser, Su Xia Zhang, Hang Li Seet, Mui Ling Sharon Nai   +7 more
doaj   +1 more source

ROBUST COLOR IMAGE WATERMARKING SCHEMES IN THE WAVELET DOMAIN [PDF]

ICTACT Journal on Image and Video Processing, 2010
In this paper, two approaches for color image watermarking in the wavelet domain are proposed. The first approach utilizes only the chrominance content of the color image for watermarking after performing a single level DWT (Discrete Wavelet Transform ...
Dejey, R.S. Rajesh
doaj  

Uncertainty-Aware Reconciliation of Conflicting Sources on the Probability Simplex via Choquet Aggregation over Fuzzy Measures

Mathematics
We study the reconciliation of several biased, partially-overlapping estimators of a latent distribution on the probability simplex (the set of non-negative credit shares summing to one) when no ground truth is available to adjudicate their disagreement ...
Ahmet Tezcan Tekin
doaj   +1 more source

Integrating Temperature History into Inherent Strain Methodology for Improved Distortion Prediction in Laser Powder Bed Fusion

Metals
Powder bed fusion–laser beam (PBF-LB) additive manufacturing enables the production of intricate, lightweight metal components aligned with Industry 4.0 and sustainable principles.
Iñaki Setien, Michele Chiumenti, Maria San Sebastian, Carlos A. Moreira, Manuel A. Caicedo   +4 more
doaj   +1 more source

Elasto-plastic residual stress analysis of selective laser sintered porous materials based on 3D-multilayer thermo-structural phase-field simulations

npj Computational Materials
Residual stress and plastic strain in additive manufactured materials can exhibit significant microscopic variation at the powder scale, profoundly influencing the overall properties of printed components.
Yangyiwei Yang, Somnath Bharech, Nick Finger, Xiandong Zhou, Jörg Schröder, Bai-Xiang Xu   +5 more
doaj   +1 more source

Synergistic enhancement of microstructure and properties in 304/TC4 cold metal transfer joints via laser pre-melting of FeCoNiCr medium-entropy alloys

Journal of Materials Research and Technology
To address the challenges of metal material repair and joining in the extreme environments specific to aerospace applications, this study conducted cold metal transfer welding of TC4 titanium alloy and 304 stainless steel by laser pre-melting FeCoNiCr ...
Xiaobin Zhang, Yunbo Qian, Yibo Zhang, Pengfei Zhao, Shuwang Bian, Wenlong Zhang, Kanglin Ke, Bangfu Zhang, Xiaohui Zheng, Qiwei Yuan   +9 more
doaj   +1 more source

Hybrid DWT NLM method with NOA optimization for ECG signal denoising

Scientific Reports
Despite the hybrid Discrete Wavelet Transform+Non Local Mean (DWT+NLM) method’s ability to leverage the processing strengths of high - and low - frequency components, it faces issues like translation transformations, modal aliasing, patch effects, and ...
Wen Chen, Yuanfang Zhang, Kaimin Yu, Chufeng Huang, Peibin Zhu, Qihui Wu, Jianzhong Hao   +6 more
doaj   +1 more source