Zobrazeno 1 - 10
of 152
pro vyhledávání: '"WEI-CHIH CHENG"'
Autor:
Hong-Wei Huang, Chien-Wei Huang, Yi-Chian Chen, Hsing-Kun Shih, Wei-Chih Cheng, Chun-Nien Liu, Chia-Chin Chiang
Publikováno v:
Micromachines, Vol 15, Iss 8, p 946 (2024)
A novel five-surface phosphor-in-glass (FS-PiG) structure for high illumination and excellent color uniformity in large-view scale LEDs for sensor light source application is demonstrated. YAG phosphor (Y3Al5O12:Ce3+) was uniformly mixed with ceramic
Externí odkaz:
https://doaj.org/article/118fecea64134cb3b3192c16f7ba1075
Autor:
Chun-Nien Liu, Kai-Chieh Chang, Chia-Ling Tsai, Wei-Chih Cheng, Tien-Tsorng Shih, Sheng-Lung Huang, Wood-Hi Cheng
Publikováno v:
IEEE Photonics Journal, Vol 15, Iss 3, Pp 1-6 (2023)
A record net gain of 17-dB has been demonstrated in a 300-nm broadband single-mode Cr-doped crystalline core fiber (CCF) with a 19-μm core diameter and 18-cm fiber length. The gain-per-unit-length of the CCF, which is an impressive 94 dB/m, is signi
Externí odkaz:
https://doaj.org/article/95bb7808efaa4218a1b73c96779515b3
Publikováno v:
IEEE Photonics Journal, Vol 13, Iss 3, Pp 1-10 (2021)
High color rendering index (CRI) of 97 and wide correlated-color temperatures (CCTs) range of 2100–7600 K in white light-emitting diodes (WLEDs) employing the two-inch diameter of CaAlSiN3: Eu2+ (red phosphor) and Lu3Al5O12: Ce3+ (green phosphor) c
Externí odkaz:
https://doaj.org/article/5066b49d6d38448e8edc977db15069eb
Autor:
Chun-Nien Liu, Jhuo-Wei Li, Yung-Hsiang Tung, Chun-Chuen Yang, Wei-Chih Cheng, Sheng-Lung Huang, Wood-Hi Cheng
Publikováno v:
IEEE Photonics Journal, Vol 12, Iss 2, Pp 1-11 (2020)
Tetrahedral chromium (Cr4+)-ions is the main contributor to gain in the broadband single-mode Cr-doped crystalline core fibers (SCCFs). We have demonstrated a gross gain of 8-dB on a length of 27-cm for a 300-nm broadband SCCF using a thermal anneali
Externí odkaz:
https://doaj.org/article/ad62e797c8534533921c04de9d968802
Publikováno v:
IEEE Journal of the Electron Devices Society, Vol 8, Pp 1138-1144 (2020)
Recess processes for the fabrication of normally-off GaN HEMTs generally compromise devices' on-state performance. In this work, recess-free quasi-normally-off GaN HEMTs with a threshold voltage of 0.24 V is realized by local control of two-dimension
Externí odkaz:
https://doaj.org/article/d7d5888297a048ab8bd37fca6bba9512
Autor:
Wei-Chih Cheng, 程韋智
104
Besides designing channel-hopping (CH) sequences, finding good methods of communication rendezvous is important for improving spectral efficiency and alleviating traffic load of cognitive radio (CR) networks. In this thesis, new asynchronous
Besides designing channel-hopping (CH) sequences, finding good methods of communication rendezvous is important for improving spectral efficiency and alleviating traffic load of cognitive radio (CR) networks. In this thesis, new asynchronous
Externí odkaz:
http://ndltd.ncl.edu.tw/handle/24430021307523717761
Autor:
Wei-Chih Cheng, 鄭偉志
103
In this thesis, the photonic crystal design software Crystal Wave ver. 3.2 is used to simulate the silicon-based substrate with etched periodically arranged holes, filled with PDMS material. Plane Wave Expansion method is used to calculate t
In this thesis, the photonic crystal design software Crystal Wave ver. 3.2 is used to simulate the silicon-based substrate with etched periodically arranged holes, filled with PDMS material. Plane Wave Expansion method is used to calculate t
Externí odkaz:
http://ndltd.ncl.edu.tw/handle/y3zwsk
Autor:
Wei-Chih Cheng, 鄭韋治
102
This doctorate dissertation is to study high-performance and high-reliability glass phosphors for WLED modules. The proposal glass phosphors are high reliability and expected to replace silica gel phosphors (low glass transition temperature,
This doctorate dissertation is to study high-performance and high-reliability glass phosphors for WLED modules. The proposal glass phosphors are high reliability and expected to replace silica gel phosphors (low glass transition temperature,
Externí odkaz:
http://ndltd.ncl.edu.tw/handle/kpkbvb
Autor:
Wei-Chih Cheng, 鄭偉志
103
Clinical diagnosis and drug susceptibility testing of Mycobacterium tuberculosis complex (MTBC) usually takes a long time using conventional methods. The goals of this study are to develop a simple and rapid method for differentiating MTBC a
Clinical diagnosis and drug susceptibility testing of Mycobacterium tuberculosis complex (MTBC) usually takes a long time using conventional methods. The goals of this study are to develop a simple and rapid method for differentiating MTBC a
Externí odkaz:
http://ndltd.ncl.edu.tw/handle/12361365377277554542
Autor:
Wei-Chih Cheng, 鄭偉志
98
The pipelined ADCs with the digital calibrations have been researched in recently years. In this thesis, a gain-error self-calibration technique is presented to allow low-gain operation amplifiers (opamps) to use in high-precision pipelined A
The pipelined ADCs with the digital calibrations have been researched in recently years. In this thesis, a gain-error self-calibration technique is presented to allow low-gain operation amplifiers (opamps) to use in high-precision pipelined A
Externí odkaz:
http://ndltd.ncl.edu.tw/handle/14568343538106911897