http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
IPO Underwriting and Subsequent Lending
Hsuan-Chi Chen,Li-Ping Chen,Keng-Yu Ho,Pei-Shih Weng 한국재무학회 2012 한국재무학회 학술대회 Vol.2012 No.09
This study investigates the relation between IPO underwriting and subsequent lending. We find that when a bank underwrites a firm’s IPO, the bank is more likely to provide the issuer with future loans at a lower cost, compared to banks without an IPO underwriting relationship. The evidence also suggests that the underwriting banks share information surplus with the IPO firms in the post-IPO loans, supporting the cost-saving hypothesis. Finally, when borrowing firms are more satisfied with the IPO outcomes, they are more likely to retain their underwriting banks as subsequent lenders. We find no evidence that underwriting banks would exploit such satisfaction by charging higher interest rates in the post-IPO loans.
STUDYING THE MORPHOLOGY AND STAR FORMATION OF GALAXIES AS A PROBE OF GALAXY EVOLUTION
CHEN, HSUAN-JU,HWANG, CHORNG-YUAN The Korean Astronomical Society 2015 天文學論叢 Vol.30 No.2
Star formation activities dominate the evolution of galaxies. Elliptical galaxies are believed to be old galaxies in the Hubble sequence, and elliptical galaxies at different evolution epochs might have different star formation activities and/or morphologies. We investigate the connection between star formation rates and the morphology of elliptical galaxies. With the Sloan Digital Sky Survey (SDSS) and the Galaxy Zoo, we select a sample of elliptical galaxies by morphology and consider their infrared emission as an index of star formation rate to study the relation between the star formation rates and their morphological properties, such as ellipticities. In addition, we select some nearby spiral galaxies with very low MIR emission to probe the mechanisms of these red spiral galaxies. We display our preliminary results and discuss their implication on the evolution of galaxies in this poster.
Three-Level Bi-Directional Half-Bridge CLLC Resonant Converter for DC Micro-Grid
Hsuan-Yu Yueh,Jing-Yuan Lin,Haung-Jen Chiu,Chen-Yen Chu,Yu-Chen Chang,Sih-Yi Lee 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
A Three-Level Bi-Directional Half-Bridge CLLC Resonant DC-DC converter for DC micro-grid application is studied on this paper, which uses dual resonant tanks to achieve wide range voltage regulation and meanwhile employs bi-directional capability. All power switches on this converter can achieve ZVS function at the whole load and the voltage stress on all power switches at both sides can be clamped at half of input voltage and output voltage since the three-level circuit architecture using the proposed synchronous rectifier (SR) control, therefore, the voltage stresses of the transformer, resonant tanks, power switches and other components are only half compared with conventional half-bridge CLLC resonant converter, the downsizing rated of components selection can be more flexible. Finally, the laboratory prototype is built to verify the performance of voltage balancing on input/output capacitor, voltage stress on switches and efficiency, the measured efficiency can be up to 95.6% over different load conditions.
Hsuan Franziska Wu,Tamara G. Amstislavskaya,Pin-Hsuan Chen,Ting-Feng Wu,Yu-Hung Chen,Chun-Ping Jen 한국바이오칩학회 2016 BioChip Journal Vol.10 No.3
Sample preconcentration is an important step that increases the accuracy of subsequent detection, especially for samples with extremely low concentrations. Due to the overlap of electrical double layers in a nanofluidic channel, the concentration polarization effect can be generated by applying an electric field. A nonlinear electrokinetic flow is induced, which results in the fast accumulation of proteins in front of the induced ionic depletion zone, the so-called exclusion- enrichment effect. In this way, a protein sample can be driven by electroosmotic flow and accumulated at a specific location. In the present study, a nanofluidic preconcentrator fabricated with the help of junction gap electric breakdown was integrated with microelectrodes for immunoassay. The preconcentration chip for proteins was fabricated using simple standard soft lithography with a polydimethylsiloxane replica. Human galectin-1 proteins from the cell lysate of T24 cells were concentrated and immunoassayed in the proposed microchip. The capability of the proposed microchip for concentrating multiple proteins from cell lysates and immunoassays after preconcentration was demonstrated. Immunosensing was evaluated by measurements of both fluorescence intensities and impedance, which proved the enhancement of preconcentration for immunoassay.
Yi-Hsuan Chen,Yi-Hsiang Lai,Ping-Heng Wu,Li-Syuan Chen,Yung-Sen Lin,Chih-Ming Chen 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.83 No.-
Surface metallization of polymer substrate andfilm adhesion are crucial to the development offlexibleelectronics. This study demonstrates the co-silanization engineering on the polyimide (PI)film by mutualintercropping of two organosilane molecules to improve their grafting orientability and enhance theadsorbability toward the PI substrate and loaded metal atoms. The mutual intercropping-inspired cosilanizationengineering is implemented by using 3-[(trimethylsilyl)ethynyl]pyridine (TEP) as asupporting organosilane to spatially confine the grafting orientation of the supported aminosilane, 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane (ETAS), leading to the formation of a wellorientedorganosilane composite nanolayer as adhesion promotion layer forflexible conductors. Theflexible Cu conductor electrolessly deposited on the PIfilm by co-silanization shows improved adhesionstrength (0.9 kgf/cm) compared to those based on mono-silanization (0.51 kgf/cm) and sputtered Ta/Cu(0.4 kgf/cm). Superior deformability (bendability) was also achieved for the co-silanized Cu/PI sample byretaining good electrical property after bending cycle up to 1000.
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.
Implementation of BOC Signal Acquisition Using a DSP/FPGA Board
Yu-Hsuan Chen,Jyh-Ching Juang,Tsai-Ling Kao 한국항해항만학회 2006 한국항해항만학회 학술대회논문집 Vol.2 No.-
Future GNSS signal using BOC modulation brings the advantages of positioning accuracy and multipath rejection. However, the BOC signal has an ambiguous autocorrelation function that complicates the process of acquisition. Three techniques that solve the ambiguous problem are BPSK-like, Sub Carrier Phase Cancellation, and Bump Jumping. In this paper, these methods are implemented by means of a DSP/FPGA board. Moreover, an experiment is conducted to examine and compare the performance of these techniques.