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Two new phenylethanoid glycosides from the roots of Phlomis umbrosa

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Chinese Chemical Letters 2007年第2期18卷 155-157页

作者： Yoshihisa Takaishi Faculty of Pharmaceutical Sciences University of TokushimaTokushima 770-8505Japan

Two new phenylethanoid glycosides were isolated from the roots of Phlomis umbrosa. Their structures were elucidated by spectroscopic methods.

关键词： Phlomis umbrosa 2,3-diacetyl-O-betonyoside D 3,4-diacetyl-O-betonyoside D

Exploring Latent Semantic Information for Textual Emotion Recognition in Blog Articles

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IEEE/CAA Journal of Automatica Sinica 2018年第1期5卷 204-216页

作者： Xin Kang Fuji Ren Yunong Wu Faculty of Engineering Tokushima University 2-1 Minamijyousanjima-cho Tokushima 770-8506 Japan IEEE

Understanding people's emotions through natural language is a challenging task for intelligent systems based on Internet of Things(Io T). The major difficulty is caused by the lack of basic knowledge in emotion expressions with respect to a variety of real world contexts. In this paper, we propose a Bayesian inference method to explore the latent semantic dimensions as contextual information in natural language and to learn the knowledge of emotion expressions based on these semantic dimensions. Our method synchronously infers the latent semantic dimensions as topics in words and predicts the emotion labels in both word-level and document-level texts. The Bayesian inference results enable us to visualize the connection between words and emotions with respect to different semantic dimensions. And by further incorporating a corpus-level hierarchy in the document emotion distribution assumption, we could balance the document emotion recognition results and achieve even better word and document emotion predictions. Our experiment of the wordlevel and the document-level emotion predictions, based on a well-developed Chinese emotion corpus Ren-CECps, renders both higher accuracy and better robustness in the word-level and the document-level emotion predictions compared to the state-of-theart emotion prediction algorithms.

关键词： Bayesian inference emotion-topic model emotion recognition multi-label classification natural language understanding

Edge enhanced depth perception with binocular meta-lens

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Opto-Electronic Science 2024年第9期3卷 4-13页

作者： Xiaoyuan Liu Jingcheng Zhang Borui Leng Yin Zhou Jialuo Cheng Takeshi Yamaguchi Takuo Tanaka Mu Ku Chen Department of Electrical Engineering City University of Hong KongHong Kong SAR 999077China Centre for Biosystems Neuroscienceand NanotechnologyCity University of Hong KongHong Kong SAR 999077China The State Key Laboratory of Terahertz and Millimeter Waves and NanotechnologyCity University of Hong KongHong Kong SAR 999077China Innovative Photon Manipulation Research Team RIKEN Center for Advanced Photonics351-0198Japan Metamaterial Laboratory RIKEN Cluster for Pioneering Research351-0198Japan Institute of Post-LED Photonics Tokushima University770-8506Japan

The increasing popularity of the metaverse has led to a growing interest and market size in spatial computing from both academia and *** portable and accurate imaging and depth sensing systems is crucial for advancing next-generation virtual reality *** work demonstrates an intelligent,lightweight,and compact edge-enhanced depth perception system that utilizes a binocular meta-lens for spatial *** miniaturized system comprises a binocular meta-lens,a 532 nm filter,and a CMOS *** disparity computation,we propose a stereo-matching neural network with a novel *** H-Module incorporates an attention mechanism into the Siamese *** symmetric architecture,with cross-pixel interaction and cross-view interaction,enables a more comprehensive analysis of contextual information in stereo *** on spatial intensity discontinuity,the edge enhancement eliminates illposed regions in the image where ambiguous depth predictions may occur due to a lack of *** the assistance of deep learning,our edge-enhanced system provides prompt responses in less than 0.15 *** edge-enhanced depth perception meta-lens imaging system will significantly contribute to accurate 3D scene modeling,machine vision,autonomous driving,and robotics development.

关键词： metasurfaces meta-lenses deep learning depth perception edge detection

First-principles simulation and experimental evidence for improvement of transmittance in ZnO films

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Progress in Natural Science:Materials International 2011年第1期21卷 40-45页

作者： Ri-ichi MURAKAMI Department of Mechanical Engineering The University of Tokushima2-1 Minamijosanjima-choTokushima 770-8506Japan

ZnO/Ag/Glass films were prepared by a DC magnetron sputtering system,which exhibit both excellent properties of high conductivity and high ***,an enhancement of transmission of ZnO films was observed after brought into contact to a silver layer,but the understanding of experimental findings for the enhancement of transmission was ***,the first-principles simulations of electrical and optical properties were utilized using the density functional theory with local-density approximations or generalized-gradient *** crystal structure of ZnO or Ag was imported from the Material Studio *** periodic supercell has the same atomic ratio with the experimental structure and was optimized using the CASTEP package in Material *** to the calculation results,the enhancement in transmission is attributed to the surface plasmon polariton in the asymmetric structure films.

关键词： first-principles transparent conductive oxide ZnO transmittance surface plasmon polaritons

Protective effect of estradiol on hepatocytic oxidative damage

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World Journal of Gastroenterology 2002年第2期8卷 363-366页

作者： Ichiro Shimizu Toshihiro Omoya Susumu Ito Second Department of Internal Medicine School of MedicineUniversity of TokushimaTokushima770-8503Japan

AIM: To examine the protective effect of estradiol on the cultured hepatocytes under oxidative stress. METHODS: Hepatocytes of rat were isolated by using perfusion method, and oxidative stress was induced by a serum-free medium and FeNTA. MDA level was determined with TBA method. Cell damage was assessed by LDH assay. Apoptosis of hepatocytes was assessed with cytoflowmetric analysis. Expression of Bcl-xl in cultured hepatocytes was detected by Western blot. The radical-scavenging activity of estradiol was valued by its ability to scavenge the stable free radical of DDPH. RESULTS: Oxidative stress increased LDH from 168 +/- 25 x 10(-6)***(-1) to 780 +/- 62 x 10(-6)***(-1) and MDA(from 0.28 +/- 0.07 x 10(-6)***(-1) to 1.35 +/- 0.12 x 10(-6)***(-1)) levels in cultured hepatocyte, and estradiol inhibited both LDH and MDA production in a dose dependent manner. In the presence of estradiol 10(-6)mol.L(-1), 10( -7 )mol.L(-1) and 10(-8)mol.L(-1),the LDH levels are 410 +/- 53 x 10(-6)***(-1) (P<0.01 vs oxidative group), 530 +/- 37 X 10(-6)***(-1 ) (P<0.01 vs oxidative group), 687+/-42 x 10(-6)***(-1) (P<0.05 vs oxidative group) respectively, and the MDA level are 0.71+/-0.12 x 10(-6)***(-1) (P<0.01 vs oxidative group),0.97+/-0.11 x 10(-6)***(-1 )(P<0.01 vs oxidative group) and 1.27+/-0.19 x 10(-6)***(-1) respectively. Estradiol suppressed apoptosis of hepatocytes induced by oxidative stress, administration of estradiol(10(-6)mol/L)decreased the apoptotic rate of hepatocytes under oxidative stress from 18.6 +/- 1.2% to 6.5 +/-2.5%, P<0.01. Bcl-xl expression was related to the degree of liver cell damage due to oxidative stress, and estradiol showed a protective action. CONCLUSION: Estradiol protects hepatocytes from oxidative damage by means of its antioxidant activity.

关键词： Oxidative Stress Animals Apoptosis Cells, Cultured Estradiol Female Flow Cytometry Hepatocytes L-Lactate Dehydrogenase Lipid Peroxidation Male Proto-Oncogene Proteins c-bcl-2 Rats Rats, Wistar Thiobarbituric Acid Reactive Substances bcl-X Protein

Evaluation of a gate-first process for AlGaN/GaN metal-oxide-semiconductor heterostructure field-effect transistors with low ohmic annealing temperature

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Chinese Physics B 2016年第3期25卷 445-447页

作者：李柳暗张家琦刘扬敖金平 School of Microelectronics Sun Yat-Sen University Guangzhou 510275 China Institute of Technology and Science Tokushima University Tokushima 770-8506 Japan

In this paper, TiN/A1Ox gated A1GaN/GaN metal-oxide-semiconductor heterostructure field-effect transistors （MOS- HFETs） were fabricated for gate-first process evaluation. By employing a low temperature ohmic process, ohmic contact can be obtained by annealing at 600 ℃ with the contact resistance approximately 1.6 Ω.mm. The ohmic annealing process also acts as a post-deposition annealing on the oxide film, resulting in good device performance. Those results demonstrated that the TiN/A1Ox gated MOS-HFETs with low temperature ohmic process can be applied for self-aligned gate AIGaN/GaN MOS-HFETs.

关键词： metal-oxide-semiconductor heterostructure field-effect transistors low temperature ohmic pro-cess inductively coupled plasma

Slang feature extraction by analysing topic change on social media

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CAAI Transactions on Intelligence Technology 2019年第1期4卷 64-71页

作者： Kazuyuki Matsumoto Fuji Ren Masaya Matsuoka Minoru Yoshida Kenji Kita Graduate School of Technology Industrial and Social SciencesTokushima University770-8506Tokushima-shiMinamijosanjima-cho 2-1Japan

Recently,the authors often see words such as youth slang,neologism and Internet slang on social networking sites(SNSs)that are not registered on *** the documents posted to SNSs include a lot of fresh information,they are thought to be useful for collecting *** is important to analyse these words(hereinafter referred to as‘slang’)and capture their features for the improvement of the accuracy of automatic information *** study aims to analyse what features can be observed in slang by focusing on the *** construct topic models from document groups including target slang on Twitter by latent Dirichlet *** the models,they chronologically the analyse change of topics during a certain period of time to find out the difference in the features between slang and general ***,they propose a slang classification method based on the change of features.

关键词： SNSs social media

Direct correlation of radiolarian Kilinora spiralis Zone with the Late Jurassic ammonite faunal succession in the Kurisaka Formation, Kurosegawa Terrane, SW Japan

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Science China Earth Sciences 2009年第12期52卷 1910-1923页

作者： ISHIDA Keisuke TSUJINO Yasuyuki KOZAI Takeshi SATO Tadashi HIRSCH Francis Laboratory of Geology Institute of SAS Faculty of Science University of Tokushima Tokushima 770-8502 Japan tokushima Prefectural Museum Bunka-no-Mori Park Tokushima 770-8070 Japan Laboratory of Geosciences Naruto University of Education Naruto 772-8502 Japan Fukada Geological Institute Hon-Komagome 2-13-12 Bunkyo-Ku Tokyo 113-0021 Japan

The last appearance datum of the radiolarian Kilinora spiralis is recorded above the first appearance datum of the ammonite Ataxioceras (A.) kurisakense in the Todoro Section of the Kurisaka Formation, Southern Kurosegawa Terrane, Shikoku, SW Japan. The constraint by ammonite age prolongs the range of the Kilinora spiralis Zone, a remarkable Jurassic radiolarian zone in Japan-NW Pacific region, into the lower Kimmeridgian. The direct correlation of the Kilinora spiralis zone with the Late Jurassic ammonite faunal succession in the Kurisaka Formation will provide a clue to the still pending chronological difference between European and North American radiolarian zones.

关键词： Late Jurassic LAD of Kilinora spiralis radiolarian zonation FAD of Ataxioceras (A.) kurisakense Kurisaka Formation Kurosegawa Terrane SW Japan

Pneumatic active suspension system for a one-wheel car model using fuzzy reasoning and a disturbance observer

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Journal of Zhejiang University Science 2004年第9期5卷 1060-1068页

作者： YOSHIMURAToshio TAKAGIAtsushi DepartmentofMechanicalEngineering FacultyofEngineeringTheUniversityofTokushimaMinamijosanjima-cho2-1Tokushima770-8506Japan

This paper presents the construction of a pneumatic active suspension system for a one-wheel car model using fuzzy reasoning and a disturbance observer. The one-wheel car model can be approximately described as a nonlinear two degrees of freedom system subject to excitation from a road profile. The active control is composed of fuzzy and disturbance controls, and the active control force is constructed by actuating a pneumatic actuator. A phase lead-lag compensator is inserted to counter the performance degradation due to the delay of the pneumatic actuator. The experimental result indicates that the proposed active suspension improves much the vibration suppression of the car model.

关键词： One-wheel car model Active suspension system Fuzzy reasoning Pneumatic actuator Disturbance observer