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Chinese Journal of Polymer Science 2018年第5期36卷 592-597页

作者： Chao Zhao ryuichi Sugimoto Yusuke Naruoka School of Environmental Science and Engineering Kochi University of Technology

Styrene emulsion polymerization using an alkyl-9-BBN, synthesized by reacting 9-BBN（9-borabicyclo-[3.3.1]-nonane） and styrene, in an aqueous sodium dodecyl sulfate（SDS） solution was studied. Ultra-high-molecular-weight（〉 1.0 × 10~7） polystyrene was synthesized using a radical initiator formed through the aerobic oxidation of this alkyl-9-BBN in a high yield（〉 80%）. The kinetics of this emulsion polymerization of styrene with the alkyl-9-BBN was investigated. We confirmed that in the initial stage of the polymerization, the initial reaction rate followed first-order kinetics. The activation energy for this emulsion polymerization of styrene was approximately 56.2 kJ/mol.

关键词： Emulsion polymerization 9-BBN Ultra-high molecular weight polystyrene

Liquid–liquid equilibrium extraction of ethanol with mixed solvent for bioethanol concentration

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Chinese Journal of Chemical Engineering 2016年第2期24卷 253-258页

作者： Hiroaki Habaki Haihao Hu ryuichi Egashira Department of International Development Engineering Graduate School of Science and EngineeringTokyo Institute of Technology

The extraction of ethanol with the solvents of aldehydes mixed with m-xylene was studied for the bioethanol concentration *** and benzaldehyde were selected as extraction solvents,with which the solubility of water is small,expecting large distribution coefficient of *** liquid–liquid two-phase region was the largest with m-xylene solvent,followed by benzaldehyde and *** region of two liquid–liquid phase became larger with the mixed solvent of m-xylene and furfural than that with furfural *** NRTL model was applied to the ethanol–water–furfural–m-xylene system,and the model could well express the liquid–liquid equilibrium of the *** any solvent used in this study,the separation selectivity of ethanol relative to water decreased as the distribution coefficient of ethanol *** separation selectivity with m-xylene was the largest among the employed solvents,but the distribution coefficient was the *** solvent mixture of furfural and m-xylene showed relatively high distribution coefficient of ethanol and separation selectivity,even in the higher mass fraction of m-xylene in the solvent *** ethanol extraction with a countercurrent multistage extractor by a continuous operation was simulated to evaluate the extraction *** ethanol content could be concentrated in the extract phase with relatively small number of extraction stages but low yield of ethanol was obtained.

关键词： Bioethanol Solvent extraction NRTL model

The Dauki Fault at the Shillong Plateau-Bengal Basin Boundary in Northeastern India:2D Finite Element Modeling

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Journal of Earth Science 2012年第6期23卷 854-863页

作者： Md Shofiqul Islam ryuichi Shinjo Faculty of Science University of the RyukyusOkinawa 903-0213Japan Department of Petroleum and Mining Engineering Shahjalal University of Science and TechnologySylhet 3114Bangladesh

The Dauki fault is a major fault along the southern boundary of the Shillong plateau that may be a source of destructive seismic hazards for the adjoining areas, including northeastern Bangladesh. In this study, we simulated the present stress distribution and the ongoing convergence deformation within the study area using numerical simulation. This simulation attempts to deter- mine the proper dip angle of the Dauki fault from a variety of differently established models but with the same realistic boundary conditions. The simulated stress field helped to predict the type of tec- tonic environment and the faulting patterns of the study area. The best-fit model can account for the compressive stress regime in the study area, except in the uppermost part of the Shillong plateau, the Bengal basin, and Assam areas where extensional stress regimes exists. In the model, the elements for which Mohr-Coulomb＇s failure occurs correspond with the observed earthquake data that refer to the Dauki fault as a north-dipping thrust fault.

关键词： Dauki fault Bengal basin tectonic stress earthquake.

Tectonics in the Northwestern West Philippine Basin

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Journal of China University of Geosciences 2008年第3期19卷 191-199页

作者：倪祥龙吴时国 Shinjo ryuichi Key Laboratory of Marine Geology and Environment Institute of Oceanology Chinese Academy of SciencesQingdao 266071 Research Institute of Petroleum Exploration ＆ Development-Northwest （NWGI） PetroChina Lanzhou 730020 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China China University of Petroleum （Huadong） Qingdao 266555 China Department of Physics and Earth Sciences University of the Ryukyus Senbaru-1 Nishihara Okinawa 903-0213 Japan

The West Philippine basin （WPB） is a currently inactive marginal basin belonging to Philippine Sea plate, which has a complex formation history and various crust structures. Based on gravity, magnetic and seismic data, the tectonics in West Philippine basin is characterized by amagma spreading stage and strike slip fractures. NNE trending Okinawa-Luzon fracture zone is a large fracture zone with apparent geomorphology and shows a right-handed movement. The results of joint gravity-magnetic-seismic inversion suggest that the Okinawa-Luzon fracture zone has intensive deformation and is a transform fault. Western existence of the NW trending fractures under Ryukyu Islands Arc is the main cause of the differences between south and north Okinawa Trough. The Urdaneta plateau is not a remained arc, but remnant of mantle plume although its lava chemistry is similar to oceanic island basalt （OIB）.

关键词： tectonics amagma spreading gravity anomaly magnetic anomaly West Philippine basin.

GIS-based Frequency Ratio and Logistic Regression Modelling for Landslide Susceptibility Mapping of Debre Sina Area in Central Ethiopia

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Journal of Mountain Science 2015年第6期12卷 1355-1372页

作者： Matebie METEN Netra Prakash BHANDARY ryuichi YATABE Geo-Disaster Research Laboratory Graduate School of Science and Engineering Ehime University

Ethiopia has a mountainous landscape which can be divided into the Northwestern and Southeastern plateaus by the Main Ethiopian Rift and Afar Depression. Debre Sina area is located in Central Ethiopia along the escarpment where landslide problem is frequent due to steep slope, complex geology, rift tectonics, heavy rainfall and seismicity. In order to tackle this problem, preparing a landslide susceptibility map is very important. For this, GISbased frequency ratio(FR) and logistic regression(LR) models have been applied using landslide inventory and the nine landslide factors(i.e. lithology, land use, distance from river & fault, slope, aspect, elevation, curvature and annual rainfall). Database construction, weighting each factor classes or factors, preparing susceptibility map and validation were the major steps to be undertaken. Both models require a rasterized landslide inventory and landslide factor maps. The former was classified into training and validation landslides. Using FR model, weights for each factor classes were calculated and assigned so that all the weighted factor maps can be added to produce a landslide susceptibility map. In the case of LR model, the entire study area is firstly divided into landslide and non-landslide areas using the training landslides. Then, these areas are changed into landslide and non-landslide points so as to extract the FR maps of the nine landslide factors. Then a linear relationship is established between training landslides and landslide factors in SPSS. Based on this relationship, the final landslide susceptibility map is prepared using LR equation. The success-rate and prediction-rate of FR model were 74.8% and 73.5%, while in case of LR model these were 75.7% and 74.5% respectively. A close similarity in the prediction and validation rates showed that the model is acceptable. Accuracy of LR model is slightly better in predicting the landslide susceptibility of the area compared to FR model.

关键词： Landslide susceptibility GIS Frequency Ratio Logistic Regression Debre Sina Ethiopia

Recent advances and challenges in task-oriented dialog systems

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Science China(Technological Sciences) 2020年第10期63卷 2011-2027页

作者： ZHANG Zheng TAKANOBU ryuichi ZHU Qi HUANG MinLie ZHU XiaoYan Department of Computer Science&.Technology Tsinghua UniversityBeijing 100084China Institute for Artificial Intelligence Tsinghua University(THUAI)Beijing 100084China Beijing National Research Center for Information Science&Technology Beijing 100084China

Due to the significance and value in human-computer interaction and natural language processing,task-oriented dialog systems are attracting more and more attention in both academic and industrial *** this paper,we survey recent advances and challenges in task-oriented dialog *** also discuss three critical topics for task-oriented dialog systems:(1)improving data efficiency to facilitate dialog modeling in low-resource settings,(2)modeling multi-turn dynamics for dialog policy learning to achieve better task-completion performance,and(3)integrating domain ontology knowledge into the dialog ***,we review the recent progresses in dialog evaluation and some widely-used *** believe that this survey,though incomplete,can shed a light on future research in task-oriented dialog systems.

关键词： task-oriented dialog systems natural language understanding dialog policy dialog state tracking natural language generation

Influence of automated driving on driver’s own localization:a driving simulator study

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Journal of Intelligent and Connected Vehicles 2018年第3期1卷 99-106页

作者： ryuichi Umeno Makoto Itoh Satoshi Kitazaki University of Tsukuba IbarakiJapan National Institute of Advanced Industrial Science and Technology Tsukuba CenterTsukuba CentralIbarakiJapan

Purpose–Level 3 automated driving,which has been defined by the Society of Automotive Engineers,may cause driver drowsiness or lack of situation awareness,which can make it difficult for the driver to recognize where he/she ***,the purpose of this study was to conduct an experimental study with a driving simulator to investigate whether automated driving affects the driver’s own localization compared to manual ***/methodology/approach–Seventeen drivers were divided into the automated operation group and manual operation *** in each group were instructed to travel along the expressway and proceed to the specified *** automated operation group was forced to select a course after receiving a Request to Intervene(RtI)from an automated driving ***–A driver who used the automated operation system tended to not take over the driving operation correctly when a lane change is immediately required after the ***/value–This is a fundamental research that examined how the automated driving operation affects the driver's own *** experimental results suggest that it is not enough to simply issue an RtI,and it is necessary to tell the driver what kind of circumstances he/she is in and what they should do next through the *** conclusion can be taken into consideration for engineers who design automatic driving vehicles.

关键词： Automated vehicles Autonomous driving Advanced driver assistant systems Driver behaviors and assistance Human-machine interfaces Request to intervene

A hybrid multi-objective optimization method considering optimization problems in power distribution systems

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Journal of Modern Power Systems and Clean Energy 2015年第1期3卷 41-50页

作者： Ken KURODA Hideki MAGORI Tomiyasu ICHIMURA ryuichi YOKOYAMA Waseda University Shinjuku-kuTokyo 91107Japan Fujitsu Limited Ohta-kuTokyo 144-8588Japan

Various kinds of new engineering technologies have been studied to realize the low-carbon and sustainable power supply systems all over the *** actual implementation of these technologies,mostly,there are multiple objectives with trade off relationships among each other,and also various constraints in the achievement of these ***,it should be essential to solve multiobjective optimization problems effectively in the applications of these new technologies in power *** paper proposes an improved method to realize multiobjective optimization for critical challenges in advanced power *** realize that,in an optimal dispersed generation installation problem,that is,one of effective measures for low-carbon power systems,various optimization methods and their combination methods are evaluated and a hybrid method for evolutionary algorithms was *** method can provide improved results compared with other state-of-the-art multi-objective optimization methods.

关键词： Dispersed generation Distribution system Evolutional strategy Multi-objective optimization Optimal power flow

Comparison of electronic structure between monolayer silicenes on Ag(111)

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Chinese Physics B 2015年第8期24卷 120-124页

作者： Chun-Liang Lin ryuichi Arafune Maki Kawai Noriaki Takagi Department of Advanced Materials Science Graduate School of Frontier ScienceThe University of Tokyo International Center for Materials Nanoarchitectonics (WPI-MANA) National Institute for Materials Science

√√The electronic structures of monolayer silicenes(4 × 4 and■ ×■R13.9o) grown on Ag(111) surface are studied by scanning tunneling spectroscopy(STS) and density functional theory(DFT) calculations. While both phases have similar electronic structures around the Fermi level, significant differences are observed in the higher energy unoccupied *** DFT calculations show that the contributions of Si 3pz orbitals to the unoccupied states are different because of their different buckled configurations.

关键词： silicene electronic structure STM DFT

Minimally invasive surgery for superior mesenteric artery syndrome:A case report

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World Journal of Gastroenterology 2015年第45期21卷 12970-12975页

作者： Si-Yuan Yao ryuichi Mikami Sakae Mikami Department of Surgery Kobe City Medical Center West Hospital Department of Gastroenterology Kobe City Medical Center West Hospital

Superior mesenteric artery(SMA) syndrome is defined as a compression of the third portion of the duodenum by the abdominal aorta and the overlying SMA. SMA syndrome associated with anorexia nervosa has been recognized, mainly among young female patients. The excessive weight loss owing to the eating disorder sometimes results in a reduced aorto-mesenteric angle and causes duodenal obstruction. Conservative treatment, including psychiatric and nutritional management, is recommended as initial therapy. If conservative treatment fails, surgery is often required. Currently, traditional open bypass surgery has been replaced by laparoscopic duodenojejunostomy as a curative surgical approach. However, single incision laparoscopic approach is rarely performed. A 20-yearold female patient with a diagnosis of anorexia nervosa and SMA syndrome was prepared for surgery after failed conservative management. As the patient had body image concerns, a single incision laparoscopic duodenojejunostomy was performed to achieve minimal scarring. As a result, good perioperative outcomes and cosmetic results were achieved. We show the first case of a young patient with SMA syndrome who was successfully treated by single incision laparoscopic duodenojejunostomy. This minimal invasive surgery would be beneficial for other patients with SMA syndrome associated with anorexia nervosa, in terms of both surgical and cosmetic outcomes.

关键词： Superior mesenteric artery syndrome Anorexia nervo