Browsing by Author "Lin, KL"

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A 3.33Gb/s (1200,720) low-density parity check code decoder
(2005)
Lin, CC
;
Lin, KL
;
Chang, HC
;
Lee, CY
;
電子工程學系及電子研究所
In this paper, a (1200,720) LDPC decoder based on an irregular parity check matrix is presented. For achieving higher chip density and less critical path delay, the proposed architecture features a new data reordering such that only one specific data bus exists between message memories and computational units. Moreover, the LDPC decoder can also process two different codewords concurrently to increase throughput and datapath efficiency. After chip implementation, a 3.33Gb/s data rate is achieved with 8 decoding iterations in the 21.23mm(2) 0.18 mu m silicon area. The other 0.13 mu m chip with the 10.24mm(2) core can further reach a 5.92Gb/s data rate under 1.02V supply.
Microstructural evolution and formation mechanism of the interface between titanium and zirconia annealed at 1550 degrees C
(2006-04-01)
Lin, KL
;
Lin, CC
;
材料科學與工程學系
;
Department of Materials Science and Engineering
The diffusional reaction between titanium and zirconia was carried out isothermally at 1550 degrees C in argon. The distinct reaction layers in the reaction-affected zone between Ti and ZrO2 were investigated using analytical scanning electron microscopy, analytical transmission electron microscopy, and electron probe microanalyses. In the metal side, there existed five reaction layers in a sequence of alpha-Ti(O), Ti2ZrO+alpha-Ti(O, Zr), Ti2ZrO+alpha-Ti(O, Zr)+beta'-Ti (O, Zr), alpha-Ti (O, Zr)+beta'-Ti (O, Zr), and beta'-Ti (Zr, O) after cooling. In the zirconia side, two reaction layers were found: near the original interface, beta'-Ti coexisted with fine spherical c-ZrO2-x and Chinese-script-like c-ZrO2-x, which dissolved a significant amount of Y2O3 in solid solution; further away from the original interface, the coarsened intergranular alpha-Zr was excluded from metastable ZrO2-x, resulting in the lenticular t-ZrO2-x and ordered c-ZrO2-x. An attempt was made to determine and propose the microstructural evolution and formation mechanism of the reaction layers between titanium and zirconia isothermally annealed at 1550 degrees C.
Protein metal binding residue prediction based on neural networks
(2005-02-01)
Lin, CT
;
Lin, KL
;
Yang, CH
;
Chung, IF
;
Huang, CD
Over one-third of protein structures contain metal ions, which are the necessary elements in life systems. Traditionally, structural biologists were used to investigate properties of metalloproteins (proteins which bind with metal ions) by physical means and interpreting the function formation and reaction mechanism of enzyme by their structures and observations from experiments in vitro. Most of proteins have primary structures (amino acid sequence information) only; however, the 3-dimension structures are not always available. In this paper, a direct analysis method is proposed to predict the protein metal-binding amino acid residues from its sequence information only by neural networks with sliding window-based feature extraction and biological feature encoding techniques. In four major bulk elements (Calcium, Potassium, Magnesium, and Sodium), the metal-binding residues are identified by the proposed method with higher than 90% sensitivity and very good accuracy under 5-fold cross validation. With such promising results, it can be extended and used as a powerful methodology for metal-binding characterization from rapidly increasing protein sequences in the future.
Protein metal binding residue prediction based on neural networks
(2004)
Lin, CT
;
Lin, KL
;
Yang, CH
;
Chung, IF
;
Huang, CD
It is known that over one-third of protein structures contain metal ions, and they are the necessary elements in life system. Traditionally, structural biologists used to investigate properties of metalloproteins (proteins which bind with metal ions) by physical means and interpret the function formation and reaction mechanism of enzyme by their structures and observation from experiments in vitro. Most of proteins have primary structures (amino acid sequence information) only; however, the 3-dimension structures are not always available. In this paper, a direct analysis method is proposed to predict protein metalbinding amino acid residues only from its sequence information by neural network with sliding window-based feature extraction and biological feature encoding techniques and it can successfully detect 15 binding elements in protein, and 6 binding elements in enzyme.
Ti2ZrO phases formed in the titanium and zirconia interface after reaction at 1550 degrees C
(2005-05-01)
Lin, KL
;
Lin, CC
;
材料科學與工程學系
;
Department of Materials Science and Engineering
Hot-pressed 3 mol% Y2O3 partially stabilized ZrO2 was reacted with titanium at 1550&DEG; C/30 min. The interface was characterized by analytical transmission microscopy (transmission electron microscopy/energy-dispersive spectroscopy). The lamellar and the spherical Ti2ZrO as well as the orthorhombic β'-Ti were found to exist in the titanium side after cooling down to room temperature. The crystal structures of the lamellar and the spherical Ti2ZrO were orthorhombic and hexagonal, respectively. On heating, the dissolution of a large amount of zirconium and oxygen into titanium gave rise to the metastably supersaturated disordered α-Ti(Zr, O) solid solution where two different Ti2ZrO phases subsequently precipitated, while the β-Ti coexisting with α-Ti at high temperatures was transformed to the orthorhombic β'-Ti during cooling. The spherical hexagonal Ti2ZrO was an ordered structure, with Zr and O occupying substitutional and interstitial sites, respectively. The orientation relations between oc-Ti and the lamellae orthorhombic Ti2ZrO were determined to be [0001](α-Ti)//[110](Ti2ZrO) and (10 (1) over bar0)(α-Ti)//(1 (1) over bar0)Ti2ZrO; meanwhile, those between the α-Ti and the spherical hexagonal Ti2ZrO were [0001](α-Ti)//[0001](Ti2ZrO) and (10 (1) over bar0)(α-Ti)//(10 (1) over bar0)(Ti2ZrO).
Zirconia-related phases in the zirconia/titanium diffusion couple after annealing at 1100 degrees-1550 degrees C
(2005-10-01)
Lin, KL
;
Lin, CC
;
材料科學與工程學系
;
Department of Materials Science and Engineering
A diffusion couple of 3 mol% Y2O3-ZrO2 and titanium was isothermally annealed in argon at temperatures between 1100 degrees and 1550 degrees C. The phases and microstructure in the ceramic side were investigated using scanning electron microscopy and transmission electron microscopy, both attached to an energy-dispersive spectrometer. After annealing at 1100 degrees C/6 h, zirconia grains did not grow conspicuously and evolved only traces of oxygen, resulting in t-ZrO2-x but not alpha-Zr. At temperatures above 1300 degrees C, a significant amount of oxygen evolved from zirconia, reducing the O/Zr ratio, such that alpha-Zr was excluded from t-ZrO2-x during cooling, yielding a higher O/Zr ratio (approximate to 2). When held at 1550 degrees C/6 h, zirconia grains grew rapidly. The alpha-Zr was segregated on grain boundaries during cooling by the exsolution of zirconium from ZrO2-x, while twinned t'-ZrO2-x or lenticular t-ZrO2-x, which was embedded in ordered c-ZrO2-x, was found. The ordered c-ZrO2-x was identified by the 1/5 {113} superlattice reflections of its electron diffraction patterns.