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C.Y. Lee
Department of Mechanical Engineering, National Taipei University of Technology, Taipei 106344, Taiwan

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Journal article
Published: 04 July 2021 in Actuators
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Classification between individuals with mild cognitive impairment (MCI) and healthy controls (HC) based on electroencephalography (EEG) has been considered a challenging task to be addressed for the purpose of its early detection. In this study, we proposed a novel EEG feature, the kernel eigen-relative-power (KERP) feature, for achieving high classification accuracy of MCI versus HC. First, we introduced the relative powers (RPs) between pairs of electrodes across 21 different subbands of 2-Hz width as the features, which have not yet been used in previous MCI-HC classification studies. Next, the Fisher’s class separability criterion was applied to determine the best electrode pairs (five electrodes) as well as the frequency subbands for extracting the most sensitive RP features. The kernel principal component analysis (kernel PCA) algorithm was further performed to extract a few more discriminating nonlinear principal components from the optimal RPs, and these components form a KERP feature vector. Results carried out on 51 participants (24 MCI and 27 HC) show that the newly introduced subband RP feature showed superior classification performance to commonly used spectral power features, including the band power, single-electrode relative power, and also the RP based on the conventional frequency bands. A high leave-one-participant-out cross-validation (LOPO-CV) classification accuracy 86.27% was achieved by the RP feature, using a simple linear discriminant analysis (LDA) classifier. Moreover, with the same classifier, the proposed KERP further improved the accuracy to 88.24%. Finally, cascading the KERP feature to a nonlinear classifier, the support vector machine (SVM), yields a high MCI-HC classification accuracy of 90.20% (sensitivity = 87.50% and specificity = 92.59%). The proposed method demonstrated a high accuracy and a high usability (only five electrodes are required), and therefore, has great potential to further develop an EEG-based computer-aided diagnosis system that can be applied for the early detection of MCI.

ACS Style

Yu-Tsung Hsiao; Chia-Fen Tsai; Chien-Te Wu; Thanh-Tung Trinh; Chun-Ying Lee; Yi-Hung Liu. MCI Detection Using Kernel Eigen-Relative-Power Features of EEG Signals. Actuators 2021, 10, 152 .

AMA Style

Yu-Tsung Hsiao, Chia-Fen Tsai, Chien-Te Wu, Thanh-Tung Trinh, Chun-Ying Lee, Yi-Hung Liu. MCI Detection Using Kernel Eigen-Relative-Power Features of EEG Signals. Actuators. 2021; 10 (7):152.

Chicago/Turabian Style

Yu-Tsung Hsiao; Chia-Fen Tsai; Chien-Te Wu; Thanh-Tung Trinh; Chun-Ying Lee; Yi-Hung Liu. 2021. "MCI Detection Using Kernel Eigen-Relative-Power Features of EEG Signals." Actuators 10, no. 7: 152.

Journal article
Published: 29 November 2020 in Journal of Mechanics
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Locknut is a critical component used in the precision machinery and its stable service performance over a long period of time in a variety of different environments presents a crucial challenge. In this study, a flank-locking precision locknut was pretreated in an immersion corrosion of 5 wt% NaCl solution to simulate the possible corrosion effects. The tightening and loosening of the locknut after 0-, 1-, 2- and 4-h corrosion treatments, respectively, was tested according to the ISO 2320 Standard. An in-house test setup with horizontal configuration was employed in measuring the torque–axial force characteristics under loading–unloading cycles. It was found that the corrosion of the locknut accelerated after 1-h immersion. The corroded specimens after 2- and 4-h treatment demonstrated more variance in measured tightening and loosening torques than their less corroded counterparts. However, after five loading–unloading cycles, the variance in measured torque decreased and the associated torque constants became more stable. Moreover, the torque constants were ∼10% higher for the 2- and 4-h corrosion-treated locknuts than their pristine counterpart. The surface morphology after corrosion and friction wear was closely related to the measured testing results.

ACS Style

Huey-Ling Chang; Chih-Ming Chen; Chun-Ying Lee. The influences of corrosion on the tightening and anti-loosening properties of a flank-locking precision locknut. Journal of Mechanics 2020, 37, 44 -52.

AMA Style

Huey-Ling Chang, Chih-Ming Chen, Chun-Ying Lee. The influences of corrosion on the tightening and anti-loosening properties of a flank-locking precision locknut. Journal of Mechanics. 2020; 37 ():44-52.

Chicago/Turabian Style

Huey-Ling Chang; Chih-Ming Chen; Chun-Ying Lee. 2020. "The influences of corrosion on the tightening and anti-loosening properties of a flank-locking precision locknut." Journal of Mechanics 37, no. : 44-52.

Conference paper
Published: 16 July 2020 in Recent Advances in Computational Mechanics and Simulations
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Metamaterials are materials having artificially tailored internal structure and unusual physical and mechanical properties. Due to their unique characteristics, metamaterials possess great potential in engineering applications. This study proposes a tunable metamaterial for the applications in vibration or acoustic isolation. For the state-of-the-art structural configurations in metamaterial, the geometry and mass distribution of the crafted internal structure is employed to induce the local resonance inside the material. Therefore, a stopband in the dispersion curve can be created because of the energy gap. For the conventional metamaterial, the stopband is fixed and unable to be adjusted in real-time once the design is completed. Although the metamaterial with distributed resonance characteristics has been proposed in the literature to extend its working stopband, the efficacy is usually compromised. In this study, the incorporation of tunable shape memory materials (SMM) via phase transformation into the metamaterial plate is proposed. Its theoretical finite element formulation for determining the dynamic characteristics is established. The effect of the configuration of the SMM cantilever absorbers on the metamaterial plate for the desired stopband in wave propagation is simulated by using finite element model. The result demonstrates the tunable capability on the stopband of the metamaterial plate under different activation controls of the SMM absorbers. The result of this study should be beneficial to precision machinery and defense industries which have desperate need in vibration and noise isolation.

ACS Style

Hua-Liang Hu; Yi-Ting Wu; Ji-Wei Peng; Chun-Ying Lee. Design and Simulation of an Acoustic Metamaterial Plate Incorporating Tunable Shape Memory Cantilever Absorbers. Recent Advances in Computational Mechanics and Simulations 2020, 152 -162.

AMA Style

Hua-Liang Hu, Yi-Ting Wu, Ji-Wei Peng, Chun-Ying Lee. Design and Simulation of an Acoustic Metamaterial Plate Incorporating Tunable Shape Memory Cantilever Absorbers. Recent Advances in Computational Mechanics and Simulations. 2020; ():152-162.

Chicago/Turabian Style

Hua-Liang Hu; Yi-Ting Wu; Ji-Wei Peng; Chun-Ying Lee. 2020. "Design and Simulation of an Acoustic Metamaterial Plate Incorporating Tunable Shape Memory Cantilever Absorbers." Recent Advances in Computational Mechanics and Simulations , no. : 152-162.

Journal article
Published: 01 February 2020 in Materials Chemistry and Physics
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ACS Style

Hung-Bin Lee; Kun-Lin Chen; Jun-Wei Su; Chun-Ying Lee. The use of surfactants and supercritical CO2 assisted processes in the electroless nickel plating of printed circuit board with blind via. Materials Chemistry and Physics 2020, 241, 1 .

AMA Style

Hung-Bin Lee, Kun-Lin Chen, Jun-Wei Su, Chun-Ying Lee. The use of surfactants and supercritical CO2 assisted processes in the electroless nickel plating of printed circuit board with blind via. Materials Chemistry and Physics. 2020; 241 ():1.

Chicago/Turabian Style

Hung-Bin Lee; Kun-Lin Chen; Jun-Wei Su; Chun-Ying Lee. 2020. "The use of surfactants and supercritical CO2 assisted processes in the electroless nickel plating of printed circuit board with blind via." Materials Chemistry and Physics 241, no. : 1.

Short communication
Published: 25 January 2019 in International Journal of Machine Tools and Manufacture
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The increased demand for high-speed, high-precision, stable, and long-life machine tools has made high-precision spindles an important topic of research. The key component of the machine tool spindle that supports the shaft is the ball bearing, whose characteristics are closely related to the spindle preload. In this study, a spindle preload control mechanism is designed using a piezoelectric actuator and a beveled spacer ring. Mechanical effects of the spindle preload are analyzed and controlled, and an experimental full-sized model is fabricated and tested. Results show that increased preload reduces vibration amplitude and raises the bearing temperature. All the measured mechanical effects are positively correlated with the controlled spindle preload.

ACS Style

Yong-Shang Ciou; Chun-Ying Lee. Controllable preload spindle with a piezoelectric actuator for machine tools. International Journal of Machine Tools and Manufacture 2019, 139, 60 -63.

AMA Style

Yong-Shang Ciou, Chun-Ying Lee. Controllable preload spindle with a piezoelectric actuator for machine tools. International Journal of Machine Tools and Manufacture. 2019; 139 ():60-63.

Chicago/Turabian Style

Yong-Shang Ciou; Chun-Ying Lee. 2019. "Controllable preload spindle with a piezoelectric actuator for machine tools." International Journal of Machine Tools and Manufacture 139, no. : 60-63.

Journal article
Published: 15 November 2018 in Additive Manufacturing
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The dimensional quality and mechanical properties of a fused filament fabrication (FFF)-printed 3D model are influenced by several process parameters. A forced-air cooling system that moves along with the print head was designed and installed on a commercial 3D FFF printer to control the cooling of the printed model. The quality of the printed polylactide (PLA) model, including the dimensions and mechanical properties, was investigated for different cooling air velocities. It was found that the cooling air velocity had different influences on the dimensional quality and mechanical strength of the printed model. More specifically, higher cooling speeds generated better geometric accuracy but lower mechanical strength. With the highest and lowest cooling air speeds of 5 m/s and 0 m/s, respectively, the tensile strengths of the printed models differed by 4-fold. In order to determine a suitable cooling air velocity setting for each specific printing material, a design model was proposed. The determined printing parameters were employed in the fabrication of a Rubik’s cube, as an example. The assembled cube demonstrated satisfactory performance both in the dimensional quality and in the mechanical function. Therefore, the cooling air velocity can be employed as an additional control parameter in 3D printing for a specified model.

ACS Style

Chun-Ying Lee; Chung-Yin Liu. The influence of forced-air cooling on a 3D printed PLA part manufactured by fused filament fabrication. Additive Manufacturing 2018, 25, 196 -203.

AMA Style

Chun-Ying Lee, Chung-Yin Liu. The influence of forced-air cooling on a 3D printed PLA part manufactured by fused filament fabrication. Additive Manufacturing. 2018; 25 ():196-203.

Chicago/Turabian Style

Chun-Ying Lee; Chung-Yin Liu. 2018. "The influence of forced-air cooling on a 3D printed PLA part manufactured by fused filament fabrication." Additive Manufacturing 25, no. : 196-203.

Journal article
Published: 18 July 2018 in Vibration
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Metamaterials are materials with an artificially tailored internal structure and unusual physical and mechanical properties such as a negative refraction coefficient, negative mass inertia, and negative modulus of elasticity, etc. Due to their unique characteristics, metamaterials possess great potential in engineering applications. This study aims to develop new acoustic metamaterials for applications in semi-active vibration isolation. For the proposed state-of-the-art structural configurations in metamaterials, the geometry and mass distribution of the crafted internal structure is employed to induce the local resonance inside the material. Therefore, a stopband in the dispersion curve can be created because of the energy gap. For conventional metamaterials, the stopband is fixed and unable to be adjusted in real-time once the design is completed. Although the metamaterial with distributed resonance characteristics has been proposed in the literature to extend its working stopband, the efficacy is usually compromised. In order to increase its adaptability to time-varying disturbance, several semi-active metamaterials have been proposed. In this study, the incorporation of a tunable shape memory alloy (SMA) into the configuration of metamaterial is proposed. The repeated resonance unit consisting of SMA beams is designed and its theoretical formulation for determining the dynamic characteristics is established. For more general application, the finite element model of this smart metamaterial is also derived and simulated. The stopband of this metamaterial beam with different configurations in the arrangement of the SMA absorbers was investigated. The result shows that the proposed model is able to predict the unique dynamic characteristics of this smart metamaterial beam. Moreover, the tunable stopband of the metamaterial beam with controlling the state of SMA absorbers was also demonstrated.

ACS Style

Hua-Liang Hu; Ji-Wei Peng; Chun-Ying Lee. Dynamic Simulation of a Metamaterial Beam Consisting of Tunable Shape Memory Material Absorbers. Vibration 2018, 1, 81 -92.

AMA Style

Hua-Liang Hu, Ji-Wei Peng, Chun-Ying Lee. Dynamic Simulation of a Metamaterial Beam Consisting of Tunable Shape Memory Material Absorbers. Vibration. 2018; 1 (1):81-92.

Chicago/Turabian Style

Hua-Liang Hu; Ji-Wei Peng; Chun-Ying Lee. 2018. "Dynamic Simulation of a Metamaterial Beam Consisting of Tunable Shape Memory Material Absorbers." Vibration 1, no. 1: 81-92.

Journal article
Published: 01 March 2018 in Surface and Coatings Technology
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Post supercritical (PSC) carbon dioxide electroplating process uses the fully mixed electrolyte with CO2 in supercritical state and then performs conventional electroplating at atmospheric pressure. The oversaturated electrolyte provides the regenerated CO2 micro bubbles and similar improvement on the prepared coating as in the supercritical electroplating is obtained. However, after being exposed to atmosphere, the electrolyte diminishes gradually the influence of oversaturated CO2. In this study, monoethanolamine (MEA) was used as an additive for a Watts bath prepared for the PSC CO2 electroplating. MEA had been employed in CO2 capture for reducing carbon emission from power plants. The adoption of MEA in the electrolyte was intended to control the CO2 regeneration from the post supercritical mixing and, subsequently, to assist the electroplating. The experimental results showed that the nickel coating prepared by adding 5 ml/L MEA in the electrolyte increased its hardness and corrosion potential both for conventional and PSC electroplating. Cross-sectional TEM micrograph revealed the columnar grain growth in the prepared nickel coating. Adding MEA in the electrolyte provided the PSC electroplated nickel coating with the emergence of crystalline defects such as dislocation and twin along with nano-grains. Therefore, the coating's hardness increased accordingly. Moreover, the collateral increase in internal tensile stress due to these defects produced cracking in the coating. More cracking and higher surface roughness of the coating should be responsible for the larger corrosion current measured in the polarization curves.

ACS Style

Bo-Wei Wang; Chun-Ying Lee; Hung-Bin Lee. The influences of monoethanolamine additive on the properties of nickel coating electroplated in post supercritical carbon dioxide mixed Watts bath. Surface and Coatings Technology 2018, 337, 232 -240.

AMA Style

Bo-Wei Wang, Chun-Ying Lee, Hung-Bin Lee. The influences of monoethanolamine additive on the properties of nickel coating electroplated in post supercritical carbon dioxide mixed Watts bath. Surface and Coatings Technology. 2018; 337 ():232-240.

Chicago/Turabian Style

Bo-Wei Wang; Chun-Ying Lee; Hung-Bin Lee. 2018. "The influences of monoethanolamine additive on the properties of nickel coating electroplated in post supercritical carbon dioxide mixed Watts bath." Surface and Coatings Technology 337, no. : 232-240.

Conference paper
Published: 01 October 2017 in 2017 12th International Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT)
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Printed circuit board (PCB) with multi-layered circuit configuration has become an important technical practice in applications. The via between circuit layers play a key component role for the integration of the circuits. For further compaction of the circuit layers, the blind via hole would be an indispensible technique and deserve continuous breakthrough. During electroless nickel plating in blind hole, the blocked path renders the flow of electrolyte difficult inside the cavity. Hence, the replenishment of reaction reagents will be difficult without the bulk flow of electrolyte. The successful plating inside the blind via hole can be challenging. In this study, different types of surfactant were employed to reduce the surface tension of the electrolyte and improve its wetting inside the blind hole. In addition, an electroless plating using post supercritical CO 2 mixed electrolyte to further improve the process was also investigated. Blind holes in 800-qm thick PCB with three different sizes of 550, 250 and 150 qm were studied. Among the surfactants used in this study, the anionic surfactant sodium dodecyl sulfate (SDS) demonstrated the best improvement in blind hole plating while the cationic surfactant cetrimonium bromide (CTAB) caused the interruption of plating even in planar substrate. With the addition of 4 g/L SDS in the electrolyte, the hardness of the coating increased by 60% comparing with its pristine counterpart. From the composition measurement, no significant modification in alloying element content was observed. This hardness increase should be indebted to the presence of Ni 3 P in the coating associated with the reduction of Ni upon the addition of SDS in the electrolyte. The results of mixing different surfactants and supercritical carbon dioxide in electroless plating solution exhibited the similar trend as that shown by conventional electroless plating solution. But with the addition of PEG, because this non-ionic surfactant helps the carbon dioxide gas dissolve into an electroless plating solution, it showed a better result. In the plating of blind hole, the use of SDS, particularly with concentration of 4g / L, demonstrated the best results and nearly 100% depth could be plated for three different sized holes. Compared with the conventional electroless plating, post supercritical process can have better performance in plating blind holes. When the supercritical carbon dioxide has been mixed, the plating bath has combined properties of gases and liquids. This feature reduces the surface tension of the bath, even in the atmospheric vent after some time, which renders the better plating performance.

ACS Style

Jun-Wei Su; Chen-Hsin Yao; Chun-Ying Lee; Wun-Jheng Zeng; Chen-Shan Peng; Su-Chiou Chen. The use of surfactants and post supercritical CO2 mixing on the electroless nickel metallization of blind holes in printed circuit board. 2017 12th International Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT) 2017, 335 -338.

AMA Style

Jun-Wei Su, Chen-Hsin Yao, Chun-Ying Lee, Wun-Jheng Zeng, Chen-Shan Peng, Su-Chiou Chen. The use of surfactants and post supercritical CO2 mixing on the electroless nickel metallization of blind holes in printed circuit board. 2017 12th International Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT). 2017; ():335-338.

Chicago/Turabian Style

Jun-Wei Su; Chen-Hsin Yao; Chun-Ying Lee; Wun-Jheng Zeng; Chen-Shan Peng; Su-Chiou Chen. 2017. "The use of surfactants and post supercritical CO2 mixing on the electroless nickel metallization of blind holes in printed circuit board." 2017 12th International Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT) , no. : 335-338.

Journal article
Published: 08 July 2017 in Applied Sciences
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This study presents vibration control using actively tunable vibration absorbers (ATVA) to suppress vibration of a thin plate. The ATVA is made of a sandwich hollow structure embedded with electrorheological fluid (ERF). ERF is considered to be one of the most important smart fluids and it is suitable to be embedded in a smart structure due to its controllable rheological property. ERF’s apparent viscosity can be controlled in response to the electric field and the change is reversible in 10 microseconds. Therefore, the physical properties of the ERF-embedded smart structure, such as the stiffness and damping coefficient, can be changed in response to the applied electric field. A mathematical model is difficult to be obtained to describe the exact characteristics of the ERF embedded ATVA because of the nonlinearity of ERF’s viscosity. Therefore, a fuzzy modeling and experimental validations of ERF-based ATVA from stationary random vibrations of thin plates are presented in this study. Because Type-2 fuzzy sets generalize Type-1 fuzzy sets so that more modeling uncertainties can be handled, a semi-active vibration controller is proposed based on Type-2 fuzzy sets. To investigate the different performances by using different types of fuzzy controllers, the experimental measurements employing both type-1 fuzzy and interval type-2 fuzzy controllers are implemented by the Compact RIO embedded system. The fuzzy modeling framework and solution methods presented in this work can be used for design, performance analysis, and optimization of ATVA from varying harmonic vibration of thin plates.

ACS Style

Chih-Jer Lin; Chun-Ying Lee; Ying Liu. Vibration Control Design for a Plate Structure with Electrorheological ATVA Using Interval Type-2 Fuzzy System. Applied Sciences 2017, 7, 707 .

AMA Style

Chih-Jer Lin, Chun-Ying Lee, Ying Liu. Vibration Control Design for a Plate Structure with Electrorheological ATVA Using Interval Type-2 Fuzzy System. Applied Sciences. 2017; 7 (7):707.

Chicago/Turabian Style

Chih-Jer Lin; Chun-Ying Lee; Ying Liu. 2017. "Vibration Control Design for a Plate Structure with Electrorheological ATVA Using Interval Type-2 Fuzzy System." Applied Sciences 7, no. 7: 707.

Journal article
Published: 01 June 2017 in Surface and Coatings Technology
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ACS Style

Hwai En Lin; Chester Ho; Chun-Ying Lee. Discharge performance of zinc coating prepared by pulse electroplating with different frequencies for application in zinc-air battery. Surface and Coatings Technology 2017, 319, 378 -385.

AMA Style

Hwai En Lin, Chester Ho, Chun-Ying Lee. Discharge performance of zinc coating prepared by pulse electroplating with different frequencies for application in zinc-air battery. Surface and Coatings Technology. 2017; 319 ():378-385.

Chicago/Turabian Style

Hwai En Lin; Chester Ho; Chun-Ying Lee. 2017. "Discharge performance of zinc coating prepared by pulse electroplating with different frequencies for application in zinc-air battery." Surface and Coatings Technology 319, no. : 378-385.

Preprint
Published: 23 May 2017
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This study presents a vibration control using actively tunable vibration absorbers (ATVA) to suppress vibration of a thin plate. The ATVA’s is made of a sandwich hollow structure embedded with the electrorheological fluid (ERF). ERF is considered to be one of the most important smart fluids and it is suitable to be embedded in a smart structure due to its controllable viscosity property. ERF’s apparent viscosity can be controlled in response to the electric field and the change is reversible in 10 microseconds. Therefore, the physical properties of the ERF-embedded smart structure, such as the stiffness and damping coefficients, can be changed in response to the applied electric field. A mathematical model is difficult to be obtained to describe the exact characteristics of the ERF embedded ATVA because of the nonlinearity of ERF’s viscosity. Therefore, a fuzzy modeling and experimental validations of ERF-based ATVA from stationary random vibrations of thin plates are presented in this study. Because Type-2 fuzzy sets generalize Type-1 fuzzy sets so that more modelling uncertainties can be handled, a semi-active vibration controller is proposed based on Type-2 fuzzy sets. To investigate the different performances by using different types of fuzzy controllers, the experimental measurements employing type-1 fuzzy and interval type-2 fuzzy controllers are implemented by the Compact RIO embedded system. The fuzzy modeling framework and solution methods presented in this work can be used for design, performance analysis, and optimization of ATVA from stationary random vibration of thin plates.

ACS Style

Chih-Jer Lin; Chun-Ying Lee; Ying Liu. Vibration Control Design for a Plate Structure with Electrorheological ATVA Using Interval Type-2 Fuzzy System. 2017, 1 .

AMA Style

Chih-Jer Lin, Chun-Ying Lee, Ying Liu. Vibration Control Design for a Plate Structure with Electrorheological ATVA Using Interval Type-2 Fuzzy System. . 2017; ():1.

Chicago/Turabian Style

Chih-Jer Lin; Chun-Ying Lee; Ying Liu. 2017. "Vibration Control Design for a Plate Structure with Electrorheological ATVA Using Interval Type-2 Fuzzy System." , no. : 1.

Journal article
Published: 01 February 2017 in Journal of Sound and Vibration
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ACS Style

Chun-Ying Lee; Jia-Hong Lin. Incorporating piezoelectric energy harvester in tunable vibration absorber for application in multi-modal vibration reduction of a platform structure. Journal of Sound and Vibration 2017, 389, 73 -88.

AMA Style

Chun-Ying Lee, Jia-Hong Lin. Incorporating piezoelectric energy harvester in tunable vibration absorber for application in multi-modal vibration reduction of a platform structure. Journal of Sound and Vibration. 2017; 389 ():73-88.

Chicago/Turabian Style

Chun-Ying Lee; Jia-Hong Lin. 2017. "Incorporating piezoelectric energy harvester in tunable vibration absorber for application in multi-modal vibration reduction of a platform structure." Journal of Sound and Vibration 389, no. : 73-88.

Journal article
Published: 01 November 2016 in Surface and Coatings Technology
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ACS Style

H.H. Sheu; H.B. Lee; S.Y. Jian; C.Y. Hsu; Chun-Ying Lee. Investigation on the corrosion resistance of trivalent chromium conversion passivate on electroplated Zn–Ni alloy. Surface and Coatings Technology 2016, 305, 241 -248.

AMA Style

H.H. Sheu, H.B. Lee, S.Y. Jian, C.Y. Hsu, Chun-Ying Lee. Investigation on the corrosion resistance of trivalent chromium conversion passivate on electroplated Zn–Ni alloy. Surface and Coatings Technology. 2016; 305 ():241-248.

Chicago/Turabian Style

H.H. Sheu; H.B. Lee; S.Y. Jian; C.Y. Hsu; Chun-Ying Lee. 2016. "Investigation on the corrosion resistance of trivalent chromium conversion passivate on electroplated Zn–Ni alloy." Surface and Coatings Technology 305, no. : 241-248.

Article
Published: 30 September 2016 in Experimental Techniques
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In this study, we proposed a new real-time internal stress measurement design based on bending deformation of electroplated specimen. The volume change of fluid compartment caused by bending deformation of specimen on the wall was measured by fluid column height in a glass tube, and then the variation of internal stress could be calculated according to the Stoney formula. There are many factors that can cause variations during measurement, such as capillary action in glass tube, temperature of electrolyte, and clamped boundary condition of specimen. Their effects in measurement were taken into account and compensated accordingly. When tested in Watts bath for nickel plating, the proposed design successfully recorded the evolution of internal stress with respect to plating thickness. Comparing with the results from commercial bent strip method and the literature, the proposed design was capable of measuring both tensile and compressive internal stresses during electroplating with good precision.

ACS Style

J.-G. Hong; C.-Y. Lee. Development of a Real-time Measurement Device for Monitoring the Internal Stress During Electroplating. Experimental Techniques 2016, 41, 51 -57.

AMA Style

J.-G. Hong, C.-Y. Lee. Development of a Real-time Measurement Device for Monitoring the Internal Stress During Electroplating. Experimental Techniques. 2016; 41 (1):51-57.

Chicago/Turabian Style

J.-G. Hong; C.-Y. Lee. 2016. "Development of a Real-time Measurement Device for Monitoring the Internal Stress During Electroplating." Experimental Techniques 41, no. 1: 51-57.

Book chapter
Published: 09 June 2016 in Applied System Innovation
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ACS Style

Chih-Jer Lin; Chun-Ying Lee; Ting-Yu Chen. Vibration control of a structure using a shape memory material absorber based on fuzzy system. Applied System Innovation 2016, 971 -975.

AMA Style

Chih-Jer Lin, Chun-Ying Lee, Ting-Yu Chen. Vibration control of a structure using a shape memory material absorber based on fuzzy system. Applied System Innovation. 2016; ():971-975.

Chicago/Turabian Style

Chih-Jer Lin; Chun-Ying Lee; Ting-Yu Chen. 2016. "Vibration control of a structure using a shape memory material absorber based on fuzzy system." Applied System Innovation , no. : 971-975.

Journal article
Published: 01 July 2015 in Journal of Sound and Vibration
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ACS Style

Chun-Ying Lee; Chun-Yuan Chen. Experimental application of a vibration absorber in structural vibration reduction using tunable fluid mass driven by micropump. Journal of Sound and Vibration 2015, 348, 31 -40.

AMA Style

Chun-Ying Lee, Chun-Yuan Chen. Experimental application of a vibration absorber in structural vibration reduction using tunable fluid mass driven by micropump. Journal of Sound and Vibration. 2015; 348 ():31-40.

Chicago/Turabian Style

Chun-Ying Lee; Chun-Yuan Chen. 2015. "Experimental application of a vibration absorber in structural vibration reduction using tunable fluid mass driven by micropump." Journal of Sound and Vibration 348, no. : 31-40.

Research article
Published: 20 April 2015 in Journal of Intelligent Material Systems and Structures
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This study used hybrid smart materials, shape memory alloy wire enclosed by shape memory polymer sleeves, to design a tunable vibration absorber for vibration reduction over a frequency range. The superelastic wire was trained into helical spring and sleeved with several layers of shape memory polymer to form the structural part of the absorber. Different electric currents could be employed to control the heating and temperature of the shape memory materials in order to tune the dynamic characteristics of the absorber. A theoretical formulation for the configuration design of this absorber based on the principle of minimum total potential energy was derived. In addition, the experimental results showed that with a control current of 1.6 A the heated vibration absorber could demonstrate a 61.6% change in its first modal frequency. After assembling the absorber onto the main structure, the tunable capacity of the absorber under different control currents was measured. Accordingly, the optimal control current spectrum over the interested frequency span for minimizing the frequency response spectrum under base excitation was determined. With this proposed tunable vibration absorber, the vibration reduction of a structure under sinusoidal base excitation at different frequencies was effectively demonstrated.

ACS Style

Chun-Ying Lee; Chung-An Pai. Design and implementation of tunable multi-degree-of-freedom vibration absorber made of hybrid shape memory helical springs. Journal of Intelligent Material Systems and Structures 2015, 27, 1047 -1060.

AMA Style

Chun-Ying Lee, Chung-An Pai. Design and implementation of tunable multi-degree-of-freedom vibration absorber made of hybrid shape memory helical springs. Journal of Intelligent Material Systems and Structures. 2015; 27 (8):1047-1060.

Chicago/Turabian Style

Chun-Ying Lee; Chung-An Pai. 2015. "Design and implementation of tunable multi-degree-of-freedom vibration absorber made of hybrid shape memory helical springs." Journal of Intelligent Material Systems and Structures 27, no. 8: 1047-1060.

Research article
Published: 15 April 2014 in Advances in Materials Science and Engineering
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Due to its widely tunable mechanical property and incompatibility with most solders, Ni-Mn alloy can become a viable candidate in the fabrication of testing probe for microelectronic devices. In this study, the electrodeposition of Ni-Mn alloy in nickel sulphamate electrolyte with the addition of manganese sulphate was investigated under direct current (DC) power source. The effects of current density and Mn2+concentration in the electrolyte on the coating composition, cathodic efficiency, microstructure and mechanical properties were explored. The results showed that the raise of the Mn2+concentration in the electrolyte alone did not effectively increase the Mn content in the coating but reduce the cathodic efficiency. On the other hand, increasing the current density facilitated the codeposition of the Mn and rendered the crystallite from coarse columnar grain to the refined one. Thus, both hardness and internal stress of the coating increased. The fabrication of testing probes at 1 A/dm2was shown to satisfy the high hardness, low internal stress, reasonable fatigue life, and nonsticking requirements for this microelectronic application.

ACS Style

Kuan-Hui Cheng; Fu-Je Chen; Chun-Ying Lee; Chao-Sung Lin; Jung-Tang Huang; Chang-Cheng Lan; Ping-Huan Tsou; Tzu-I Ho. Fabrication of Ni-Mn Microprobe Structure with Low Internal Stress and High Hardness by Employing DC Electrodeposition. Advances in Materials Science and Engineering 2014, 2014, 1 -6.

AMA Style

Kuan-Hui Cheng, Fu-Je Chen, Chun-Ying Lee, Chao-Sung Lin, Jung-Tang Huang, Chang-Cheng Lan, Ping-Huan Tsou, Tzu-I Ho. Fabrication of Ni-Mn Microprobe Structure with Low Internal Stress and High Hardness by Employing DC Electrodeposition. Advances in Materials Science and Engineering. 2014; 2014 ():1-6.

Chicago/Turabian Style

Kuan-Hui Cheng; Fu-Je Chen; Chun-Ying Lee; Chao-Sung Lin; Jung-Tang Huang; Chang-Cheng Lan; Ping-Huan Tsou; Tzu-I Ho. 2014. "Fabrication of Ni-Mn Microprobe Structure with Low Internal Stress and High Hardness by Employing DC Electrodeposition." Advances in Materials Science and Engineering 2014, no. : 1-6.

Journal article
Published: 01 November 2013 in Japanese Journal of Applied Physics
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20–100 nm thin films of silver were first deposited on quartz glass by magnetron sputtering. These specimens were then annealed at 500 °C for 15 min by rapid thermal annealing (RTA), which might change the silver films into having a morphology of nano islands. Subsequently, a thin film of Mn-doped ZnO was deposited on the above specimens in a sputtering system. These specimens were removed from the sputtering system and annealed again in an atmospheric furnace at 1200 °C for 2 h. By X-ray diffraction (XRD) analysis, the annealed samples were identified as Mn-doped Zn2SiO4 crystals. Furthermore, photoluminescence (PL) measurement showed the 530 nm (green light) fluorescence. The silver nano islands embedded in the Mn-doped Zn2SiO4 crystals tended to show an increase in PL intensity in the following order and in increase rate composed with their pristine Mn-doped Zn2SiO4 counterpart: 100 nm Ag (-0.33%), 50 nm Ag (-0.02%), 20 nm Ag (87.4%), 40 nm Ag (124.3%), and 30 nm Ag (168.5%). Accordingly, the plasmon effect may lead to the enhancement of fluorescence, and the size of silver nano islands determines the increase rate.

ACS Style

Kun-Cheng Peng; Yi-Chung Lin; Shiu-Jen Liu; Tai-Er Chen; Chun-Ying Lee. Mn-Doped Zn 2 SiO 4 Thin Film with Green Fluorescence Enhanced by Ag Nano Island Surface Plasmon Effect. Japanese Journal of Applied Physics 2013, 52, 11 .

AMA Style

Kun-Cheng Peng, Yi-Chung Lin, Shiu-Jen Liu, Tai-Er Chen, Chun-Ying Lee. Mn-Doped Zn 2 SiO 4 Thin Film with Green Fluorescence Enhanced by Ag Nano Island Surface Plasmon Effect. Japanese Journal of Applied Physics. 2013; 52 (11):11.

Chicago/Turabian Style

Kun-Cheng Peng; Yi-Chung Lin; Shiu-Jen Liu; Tai-Er Chen; Chun-Ying Lee. 2013. "Mn-Doped Zn 2 SiO 4 Thin Film with Green Fluorescence Enhanced by Ag Nano Island Surface Plasmon Effect." Japanese Journal of Applied Physics 52, no. 11: 11.