Industrial Technology Research Institute

Realtek Semiconductor Inc.

Epistar Corporation

Taiwan Semiconductor Manufacturing Comp. Ltd.

National Yang Ming Chiao Tung University

Yen-Chih Chen

Der-Zheng Liu

Tsung-Chun Cheng

Man-Yin Lo

Tsun-Kai Ko

Hsin-Hsien Wu

Hsi-Yen Hsu

Cheng-Hsiung Yen

Yu-Yao Lin

Chien-Yuan Tseng

Chun-Ta Yu

Shih-Chun Ling

Min-Hsun Hsieh

Ming-Chi Hsu

Schang-Jing Hon

Hsin-Ying Wang

Chien-Kai Chung

Chien-Chun Cheng

Wei-Chih Peng

Chun-Kai Wang

Yi-Chang Liu

Ying-Chieh Lee

Yu-Ted Su

Yuan-Peng Du

Wei-Yu Yen

Nai-Chia Cheng

A process of utilizing the catalyst for converting carbon oxide into methanol is provided. The process includes putting a catalyst into a fixed bed reactor and introducing a gas mixture of hydrogen and the carbon oxide into the fixed bed reactor, and performing a hydrogenation reaction under the effect of the catalyst to form the methanol

Process for converting carbon oxide into methanol

A catalyst for methanation reaction and a method for preparing methane are provided. The catalyst for methanation reaction includes a core, a shell encapsulating the core, and an active metal. The core includes cerium dioxide (CeO), the shell includes zirconium dioxide (ZrO), and the active metal is in particle form and is disposed on an outer surface of the shell layer.

Catalyst for methanation reaction and method for preparing methane

A method for preparing dialkyl carbonate is provided. The preparation method includes the following steps. An alcohol compound, carbon dioxide and a catalyst are mixed to form a mixing solution. Organic acid is added to the mixing solution to carry out a synthesis reaction of dialkyl carbonate. The alcohol compound includes methanol, ethanol, propanol or butanol. The catalyst includes cerium oxide, zirconium oxide, titanium oxide, lanthanum oxide or a combination thereof. The organic acid includes formic acid, acetic acid, propionic acid, butyric acid, valeric acid or a combination thereof.

Method for preparing dialkyl carbonate

A chemical mechanical polish (CMP) system is provided. The CMP system includes a platen rotatable about a rotation axis. The CMP system further includes a polishing pad positioned on the platen. The CMP system also includes a detecting module having a base portion and a number of pins positioned over the polishing pad. The pins are movable relative to the platen and have their bottom end in direct contact with the polishing pad to detect the planarity of the polishing pad.

Method and system for monitoring polishing pad before CMP process

This application discloses a light-emitting diode comprising a first semiconductor layer, an active layer on the first semiconductor layer, a second semiconductor layer on the active layer, and a semiconductor contact layer on the second semiconductor layer. The second semiconductor layer comprises a first sub-layer and a second sub-layer formed above the first sub-layer, wherein the material of the second sub-layer comprises AlGaN (0&#x3c;x&#x3c;1) and the second sub-layer has a surface comprising a structure of irregularly distributed holes.

Light-emitting diode

A light-emitting device comprises a first type semiconductor layer, a multi-quantum well structure on the first type semiconductor layer, and a second type semiconductor layer on the multi-quantum well structure, wherein the multi-quantum well structure comprises a first portion near the first type semiconductor layer, a second portion near the second type semiconductor layer, and a strain releasing layer between the first portion and the second portion and comprising a first layer including Indium, a second layer including Aluminum on the first layer, and a third layer including Indium on the second layer, wherein the Indium concentration of the third layer is higher than that of the first layer.

Light emitting device

A model-based channel estimator for correlated fading channels adapted to a multiple-input multiple-output (MIMO) system, estimates a coefficient vector of a channel matrix for a given angle of departure (AoD) according to a plurality of received signals, a plurality of transmit pilots, a plurality of known model orders, and a plurality of predetermined bases for exploiting time, frequency, spatial channel correlation among a transmit antenna array, and spatial channel correlation among a receive antenna array, then estimates a mean AoD based on the estimated channel matrix. The channel estimator estimates iteratively the coefficient vector and the mean AoD until a stop criterion is met. Then, it reconstructs a channel estimate by using the plurality of predetermined bases, the coefficient vector, and the mean AoD.

Model-based channel estimator for correlated fading channels and channel estimation method thereof

An optoelectronic device includes a substrate and a first transition stack formed on the substrate including at least a first transition layer formed on the substrate and having at least one hollow component formed inside the first transition layer, and a second transition layer wherein the second transition layer is an unintentional doped layer or an undoped layer formed on the first transition layer.

Optoelectronic device and method for manufacturing the same

Disclosed is a light-emitting element comprises a substrate; a light-emitting stack layer disposed on the substrate; wherein the light-emitting stack layer comprises a first semiconductor layer, a first active layer disposed on the first semiconductor layer, a magnetic film layer disposed on the first active layer, a second active layer disposed on the magnetic film layer, and a second semiconductor layer disposed on the second active layer.

Light-emitting device

A sphere decoding method applied to a MIMO channel is provided. Multiple constellation points of an ndetection layer corresponding to a MIMO channel matrix are enumerated based on an enumeration rule, and at least one nsub-set of the ndetection layer is defined. K constellation points are obtained from each of the at least one nsub-set as preferred points, and Kpreferred points are selected from all the K preferred points of the at least one nsub-set. Kpreferred points are transferred to a second detection layer from a first detection layer. Kpreferred points are transferred to a Tdetection layer from a (T&#x2212;1)detection layer. An optimal solution is determined according to Kpreferred points of the ndetection layer. K and at least one of Kto Kare determined by the The characteristic of the MIMO channel matrix.

Sphere decoding method applied to multi-input multi-output (MIMO) channel

A sphere decoding method applied to a MIMO channel is provided. T signals transmitted via the MIMO channel are received. A first triangular matrix corresponding to a channel matrix is generated and mapped from the complex domain into the real domain to obtain a second triangular matrix. A first zero-forcing soft-output solution corresponding to a first estimation layer is found, and multiple preferred points P(1) are obtained. Multiple n-th zero-forcing soft-output solutions corresponding to an n-th estimation layer are obtained according to multiple preferred points P(n&#x2212;1), and multiple preferred points P(n) are obtained according to PEDs of multiple n-th constellation points. Multiple 2T-th zero-forcing soft-output solutions are obtained according to the preferred points P(2T&#x2212;1) and multiple preferred points P(2T) are obtained correspondingly. The preferred point P(2T) corresponding to the least PED is mapped from the real domain into the complex domain to generate an optimal solution of the T signals.

A sphere decoding method applied to a MIMO channel is provided. Multiple constellation points of an ndetection layer corresponding to the MIMO channel matrix are enumerated based on an enumeration rule, and at least one nsub-set of the nth detection layer is defined. The constellation point with the least PED is obtained as a preferred point. Another constellation, not in the nsub-set, of the nth detection layer is selected to substitute for the preferred point as one of the nsub-set. If other preferred points are needed to be obtained, the nsub-set is updated repeatedly according to the least PED. An optimal solution is determined according to Kpreferred points of the ndetection layer.

A sphere decoding method applied to a MIMO channel is provided. Multiple constellation points of an ndetection layer corresponding to a MIMO channel matrix are enumerated based on an enumeration rule, and at least one nsub-set of the ndetection layer is defined. The candidate range of the constellation points of the at least one nsub-set is determined according to a predetermined number K of the preferred points of the at least one nsub-set. K constellation points are obtained from the at least one nsub-set as the preferred points according to partial Euclidean distances of the constellation points. The at least one nsub-set includes at least K constellation points. Kpreferred points are selected from all K preferred points of the at least one nsub-set. An optimal solution is determined according to the K, preferred points.

Growing community of inventors

Hsinchu, Taiwan

Yen-Chih Chen