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Chih-Hong Lin 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.4
The Editor-in-Chief has retracted this article [1] because it contains significant overlap with a previous publication by the same author [2]. This article is therefore redundant. Author Chih-Hong Lin agrees to this retraction.
Microstructure and Mechanical Properties of (TiZrHf)50(NiCoCu)50 High Entropy Alloys
Chih‑Hsuan Chen,Yue‑Jin Chen,Jia‑Jyun Shen 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.5
The microstructure and mechanical properties of pseudo-binary (TiZrHf)50(NiCoCu)50 high entropy alloys(HEAs) with B2 matrix were investigated in this study. The studied HEAs includes Ti40Zr10Ni40Co5Cu5,Ti30Zr20Ni30Co10Cu10,Ti25Zr25Ni16.67Co16.67Cu16.67,Ti30Zr10Hf10Ni30Co10Cu10,Ti20Zr15Hf15Ni20Co15Cu15,andTi16.67Zr16.67Hf16.67Ni16.67Co16.67Cu16.67. XRD and SEM analyses revealed that all studied HEAs were a mixture of B2 andC15 intermetallic phases, instead of a single solid solution, due to their highly negative enthalpy of mixing and the relativelylarge difference in atomic radii. The B2 matrix was found capable of forming a solid solution of all six elements in a widecomposition range. The lattice constants of B2 and C15 phases increase linearly with increasing the difference in atomicradii. Additionally, the microhardness of these HEAs increases from 409 to 595 HV with the increasing difference in atomicradii as well. Compression tests demonstrated substitution of Zr with Hf can improve the ductility. In all studied HEAs, theTi30Zr10Hf10Ni30Co10Cu10HEA achieves a great balance between yield strength, ultimate compressive strength, and fracturestrain of 1574 MPa, 1933 MPa, and 6.5%, respectively.
台灣對管制規範的改革 : 以對電子媒體核發臨時執照的運用為核心
吳志光 梨花女子大學校 法學硏究所 2015 法學論集 Vol.19 No.4
For the purposes of legal norms, all regulations are to overall efficiency, but excessive regulation will be mutual interference as to obstruct efficiency. The regulatory reform has become a responsibility of guarantor state. But for the fair competition or maintenance of social diversity shall be means special permission of regulation, this is the concerns of economic administrative law and Fair Trade Act. In particular, for regulation of electronic media involves freedom of expression and make it easier for controversial issue. In July 2005 Taiwan’s Government unprecedentedly rejected seven satellite broadcasting and television operator's application for the renewal of the operation license. At the time it caused much controversy. In support of the rule of law and procedures, which has a certain worth exploring. How to avoid producing all or none as a result of regulation, traditionally mainly to make administrative disposition with the incidental provision of agrees to the application licensing, mostly is the "conditions" or "burden" manner. But this way is not without controversy, in particular administrative discretion often become the focus of controversy. In 2007 the Cable Radio and Television Act amendments to new articles 35-1,1) it is creation of the "temporary operation license” as a new models of regulation. The regulatory reform is also as a responses of controversy in 2005. The temporary operation license could replace direct refused to apply for the renewal of the operation license, and also can be replaced by making a provisional injunction of Administrative Court. More importantly, the temporary operation license created the regulatory measures for the time foresee the possibility, this is the lack of the administrative disposition with incidental provision by the advantages. After all the purpose of regulation to public interests. At the same time how to balance the rights of the applicant of operation license, the temporary operation license should be the greatest common divisor.
Fast Image Compression Using Over-complete ICAMM
Chih-Cheng Peng,Chih-Hong Kao,Sheng-Ping Hsieh 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
This paper presents a new over complete ICAMM to make decomposition the basis for low-bit high-speed image compression on image sub-blocks. Although the over complete independent component analysis basic number is much larger than the original data dimension, most of the coefficients will be zero after performing the basis transform so that this algorithm reaches the low bit-rate compression goal. The over complete independent component effect approximates the wavelet basis functions. This is different from the discrete cosine function and wavelet function in that the independent component is relevant to the data itself. When using the over complete independent component analysis to decompose the image sub-blocks, it can divide self-adaptive learning into several subgroups based on the different characteristics of the text images. Each subgroup has a set of corresponding over complete independent components. In this way, it can be more efficient to reduce the bit rate use. At the same time the information in the subgroup can also be used in image transmission based on the different encodings. The experimental results show that our proposed approach achieves low bit-rate image compression.
Chih-Ping Wu,Chih-Chen Lin 국제구조공학회 2020 Structural Engineering and Mechanics, An Int'l Jou Vol.75 No.1
An asymptotic local plane strain elasticity theory is reformulated for the static analysis of a simply-supported, multiple graphene sheet system (MGSS) in cylindrical bending and resting on an elastic medium. The dimension of the MGSS in the y direction is considered to be much greater than those in the x and z directions, such that all the field variables are considered to be independent of the y coordinate. Eringen’s nonlocal constitutive relations are used to account for the small length scale effects in the formulation examining the static behavior of the MGSS. The interaction between the MGSS and its surrounding foundation is modelled as a Winkler foundation with the parameter kw, and the interaction between adjacent graphene sheets (GSs) is considered using another Winkler model with the parameter cw. A parametric study with regard to some effects on the static behavior of the MGSS resting on an elastic medium is undertaken, such as the aspect ratio, the number of the GSs, the stiffness of the medium between the adjacent layers and that of the surrounding medium of the MGSS, and the nonlocal parameter.
Effect of a Carbon Additive on the TbCu7-type Melt-spun Sm(Co, M)7 (M=Ti, Zr, Hf, V and Ge) Ribbons
Chih-Chieh Hsieh,Shih-Teng Huang,Jin-Sheng Guo,Chih-Wei Shih,Wen-Cheng Chang,Huang-Wei Chang,Chun-Chung Shaw 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
The effect of a carbon additive on the microstructure and the magnetic properties of melt-spunSmCo7−xMxCy (M=Ti, Zr, Hf, V and Ge; x = 0 - 0.3 and y = 0 - 0.1) ribbons was studied. Based on the XRD and the TEM analyses, a pure 1:7 phase could be formed for the C-containingribbons with M= Ti and Ge. However, carbide phases, i.e., Sm2C3 for M=Zr and Hf, and SmCoC2for M=V, respectively, were found. Nevertheless, a slight C addition may effectively refine themicrostructure and improve both the intrinsic coercvity and the magnetic energy product in all thestudied ribbons. Among them, the SmCo6.9V0.1C0.1 ribbons with r = 58.7 emu/g, iHc = 13.5kOe and (BH)max = 9.3 MGOe, and the SmCo6.9Hf0.1C0.1 ribbons with r = 61.6 emu/g, iHc =11.8 kOe and (BH)max = 10.3 MGOe are most suitable for the bonded magnet applications.
( Chih Chun Hsieh ),( Tao Chih Chang ),( Dong Yih Lin ),( Ming Che Chen ),( Wei Te Wu ) 대한금속재료학회 ( 구 대한금속학회 ) 2007 METALS AND MATERIALS International Vol.13 No.5
The purpose of this study is to investigate the precipitation characteristics of σ phase in the fusion zone of stainless steel welds at various welding passes during a tungsten arc welding (GTAW) process. The morphology, quantity, and chemical composition of the δ-ferrite and σ phase were analyzed using optical microscopy (OM), a ferritscope (FS), a X-ray diffractometer (XRD), scanning electron microscopy (SEM), an electron probe micro-analyzer (EPMA), and a wavelength dispersive spectrometer (WDS), respectively. Massive δ-ferrite was observed in the fusion zone of the first pass welds during welding of dissimilar stainless steels. The σ phase precipitated at the inner δ-ferrite particles and decreased δ-ferrite content during the third pass welding. The σ and δ phases can be stabilized by Si element, which promoted the phase transformation of δ→σ + γ2 in the fusion zone of the third pass welds. It was found that the σ phase was a Fe-Cr-Si intermetallic compound found in the fusion zone of the third pass welds during multi-pass welding.
Design Customization of Respiratory Mask based on 3D Face Anthropometric Data
Chih-Hsing Chu,Szu-Hao Huang,Chih-Kai Yang,Chun-Yang Tseng 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.
This study presents a machine learning based method for design customization of a 3D respiratory mask. A parametric model of a3D human face was constructed from an anthropometric database consisting of 495 facial models. An AdaBoost.R algorithm wasapplied to identify a set of measurable parameters most related to the facial geometry. The correlation between parameters wasestimated using principal component analysis and linear regression. With those parameter values as input, the parametric modelgenerates 3D meshes of a human face that serve as a design reference for the construction of a customized respiratory mask of agood fit. We conducted a series of experiments with 10-fold cross-validation to validate the effectiveness of the proposed method.