13 results for "Jeng-Rong Ho"

Laser Patterning of Carbon-Nanotubes Thin Films and Their Applications

Shiang-Kuo Chang-Jian; Jeng-Rong Ho

Carbon Nanotubes Applications on Electron Devices · 2011 · English · IntechOpen

Automatically Tightening Tiny Screw Using Two Images and Positioning Control

Shou-Yu Chen; Jeng-Rong Ho; Pi-Cheng Tung et al.

Mathematics, Vol. 9 No. 19 · 2021 · English · DOAJ Scopus

This paper describes how to tighten M1.4 screws by controlling a manipulator. The whole process is based on a human–machine interface designed using Visual Studio C++ to run image processing algorithms and control the position of a manipulator. Two charge-coupled device cameras are used. One is…

Prediction of Kerf Width in Laser Cutting of Thin Non-Oriented Electrical Steel Sheets Using Convolutional Neural Network

Dinh-Tu Nguyen; Jeng-Rong Ho; Pi-Cheng Tung et al.

Mathematics, Vol. 9 No. 18 · 2021 · English · DOAJ Scopus

Kerf width is one of the most important quality items in cutting of thin metallic sheets. The aim of this study was to develop a convolutional neural network (CNN) model for analysis and prediction of kerf width in laser cutting of thin non-oriented electrical steel sheets. Three input process…

Design of Optimal Controllers for Unknown Dynamic Systems through the Nelder–Mead Simplex Method

Hsun-Heng Tsai; Chyun-Chau Fuh; Jeng-Rong Ho et al.

Mathematics, Vol. 9 No. 16 · 2021 · English · DOAJ Scopus

This paper presents an efficient method for designing optimal controllers. First, we established a performance index according to the system characteristics. In order to ensure that this performance index is applicable even when the state/output of the system is not within the allowable range, we…

Characterizations of photoconductivity of graphene oxide thin films

Shiang-Kuo Chang-Jian; Jeng-Rong Ho; J.-W. John Cheng et al.

AIP Advances, Vol. 2 No. 2 · 2012 · English · DOAJ Scopus

Characterizations of photoresponse of a graphene oxide (GO) thin film to a near infrared laser light were studied. Results showed the photocurrent in the GO thin film was cathodic, always flowing in an opposite direction to the initial current generated by the preset bias voltage that shows a…

Enhancing mechanical properties of selective-laser-melting TiN/AISI 420 composites through Taguchi GRA and PCA multi-response optimization

Duc Tran; Chih-Kuang Lin; Pi-Cheng Tung et al.

Journal of Materials Research and Technology, Vol. 29 · 2024 · English · DOAJ Scopus

The enhancement of mechanical properties in martensitic AISI 420 stainless steel is realized through the incorporation of TiN ceramic particles using the selective laser melting (SLM) method. This study introduces an innovative hybrid mixing method designed to uniformly disperse TiN within the AISI…

Prediction and optimization of dross formation in laser cutting of electrical steel sheet in different environments

Muhamad Nur Rohman; Jeng-Rong Ho; Pi-Cheng Tung et al.

Journal of Materials Research and Technology, Vol. 18 · 2022 · English · DOAJ Scopus

Dross formation in laser cutting of electrical steel sheet in different environments, namely oil, alcohol, and air, was predicted and optimized using a deep neural network (DNN) and an improved grey wolf optimizer (I-GWO), respectively. Analyses using random forest method and response surface…

Temperature-Controlled Laser Cutting of an Electrical Steel Sheet Using a Novel Fuzzy Logic Controller

Dinh-Tu Nguyen; Yuan-Ting Lin; Jeng-Rong Ho et al.

Mathematics, Vol. 11 No. 23 · 2023 · English · DOAJ Scopus

A novel PID-type fuzzy logic controller (FLC) with an online fuzzy tuner was created to maintain stable in situ control of the cutting front temperature, aiming to enhance the laser process for thin non-oriented electrical steel sheets. In the developed controller, the output scaling factors and…

Controller Design for Unstable Time-Delay Systems with Unknown Transfer Functions

Hsun-Heng Tsai; Chyun-Chau Fuh; Jeng-Rong Ho et al.

Mathematics, Vol. 10 No. 3 · 2022 · English · DOAJ Scopus

This study developed a method for designing parallel two-degree-of-freedom proportional-integral-derivative controllers for unstable time-delay processes with unknown dynamic equations. First, a performance index accounting for both transient response performance and disturbance rejection was…

Predicting and Enhancing the Multiple Output Qualities in Curved Laser Cutting of Thin Electrical Steel Sheets Using an Artificial Intelligence Approach

Muhamad Nur Rohman; Jeng-Rong Ho; Chin-Te Lin et al.

Mathematics, Vol. 12 No. 7 · 2024 · English · DOAJ Scopus

This study focused on the efficacy of employing a pulsed fiber laser in the curved cutting of thin, non-oriented electrical steel sheets. Experiments were conducted in paraffinic oil by adjusting the input process parameters, including laser power, pulse frequency, cutting speed, and curvature…

PEDOT:PSS/Graphene Nanocomposite Hole-Injection Layer in Polymer Light-Emitting Diodes

Chun-Hsuan Lin; Kun-Tso Chen; Jeng-Rong Ho et al.

Journal of Nanotechnology, Vol. 2012 · 2012 · English · DOAJ Scopus

We report on effects of doping graphene in poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate), PEDOT:PSS, as a PEDOT:PSS/graphene nanocomposite hole injection layer on the performance enhancement of polymer light-emitting diodes (PLEDs). Graphene oxides were first synthesized and then mixed…

Multi-Quality optimization in pulsed laser cutting of thin laminated cores using the preference selection index method

Nguyen Van Tai; Van Cuong Nguyen; Thanh Thuong Huynh et al.

CTU Journal of Innovation and Sustainable Development, Vol. 17 No. Special issue: ETMD · 2025 · English · DOAJ Scopus

This study explores a pulsed Nd:YAG laser cutting of thin laminated cores made from non-oriented electrical steel sheets, aiming to optimize cutting quality aims to investigate the cutting quality of a thin laminated core using a non-oriented electrical steel sheet by a pulsed fiber Nd: YAG laser…

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