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光学互连与光信号处理的集成光电子学

红外 1994年第12期15卷 7-14页

作者： osamu wada 高国龙日本Fujisu实验室有限公司

采用Ⅲ-Ⅴ族化合物半导体技术的集成光电子学预期能为电子数字系统中的互连与信号处理提供新的技术,从而利用光学技术的诸如高数据传输速率和高并行度之类的优点解决数据通讯与处理方面的布线限度问题。光学互连器件是这项工作的关键,... 详细信息

采用Ⅲ-Ⅴ族化合物半导体技术的集成光电子学预期能为电子数字系统中的互连与信号处理提供新的技术,从而利用光学技术的诸如高数据传输速率和高并行度之类的优点解决数据通讯与处理方面的布线限度问题。光学互连器件是这项工作的关键,目前正在开展的研制工作将不仅可以用多路传输方法传输大量数据,而且还可以提供灵活的互连功能。本文概略地介绍了光学互连和信号处理系统用的集成光电子学技术的作用和现状。

关键词：集成光电子学光学互连光信号信号处理

在1微米波长范围内高速高辐射率InGaAsP/InP DH LED的制作和最佳设计

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微纳电子技术 1983年第4期 29-39页

作者： osamu wada 张万生

本文介绍了具有单片集成透镜的InGaAsP/InP双异质结(DH)发光管(LED)的制作和设计。这种器件具有高速和高辐射性能。分析了诸如耦合功率、电-光线性度、截止频率等工作特性与LED、光纤结构参数的依从关系,提出了模型,并用于完成最佳设计... 详细信息

本文介绍了具有单片集成透镜的InGaAsP/InP双异质结(DH)发光管(LED)的制作和设计。这种器件具有高速和高辐射性能。分析了诸如耦合功率、电-光线性度、截止频率等工作特性与LED、光纤结构参数的依从关系,提出了模型,并用于完成最佳设计。现已发现高倍数的透镜能使耦合输出功率和响应速度同时达到最大值。在1.15、1.3、1.5μm波长下做出了与50μm芯径0.2NA梯度折射率光纤相耦合的LED。尤其在截止频率方面得到了明显改善,在1.3μm波长耦合功率(35μW)没有减小的情况下,工作电流100mA的截止频率最大值已达到120MHz。这种二极管的高速大功率性能对高比特率传输系统的应用是很有前途的。

关键词： InGaAsP/InP DH LED 放大倍数线性度电流特性最佳设计最优设计截止频率有源层光导纤维光纤透镜 InP DH

WHOF 78:Semiconductor nanostructure-based photonic devices for ultrafast,power-efficient systems

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Frontiers of Optoelectronics 2015年第3期 349-349页

作者： osamu wada Kobe University

This talk first reviews key issues of photonic devices for future systems and then discusses recent developments using semiconductor nanostructures with a particular focus on ultrafast switching devices based on quantum dot(QD) *** include QD-based semiconductor optical amplifiers(SOAs) exhibiting polarization-insensitive operation at >40 Gb/s and novel QD-based vertical cavity structure photonic switches showing ultrafast,power-efficient all-optical switching ***-based photonic devices are summarized and discussed for future applications.

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Predictive modelling of volumetric and Marshall properties of asphalt mixtures modified with waste tire-derived char:A statistical neural network approach

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Journal of Road Engineering 2024年第3期4卷 318-333页

作者： Nura Shehu Aliyu Yaro Muslich Hartadi Sutanto Noor Zainab Habib Aliyu Usman Abiola Adebanjo Surajo Abubakar wada Ahmad Hussaini Jagaba Department of Civil and Environmental Engineering Universiti Teknologi PETRONASSeri Iskandar 32610Malaysia Department of Civil Engineering Ahmadu Bello UniversityZaria 810107Nigeria Institute of Infrastructure and Environment Heriot-Watt UniversityDubai 294345United Arab Emirates School of Civil Engineering Central South UniversityChangsha 410075China Interdisciplinary Research Centre for Membranes and Water Security King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia

The goals of this study are to assess the viability of waste tire-derived char(WTDC)as a sustainable,low-cost fine aggregate surrogate material for asphalt mixtures and to develop the statistically coupled neural network(SCNN)model for predicting volumetric and Marshall properties of asphalt mixtures modified with *** study is based on experimental data acquired from laboratory volumetric and Marshall properties testing on WTDCmodified asphalt mixtures(WTDC-MAM).The input variables comprised waste tire char content and asphalt binder *** output variables comprised mixture unit weight,total voids,voids filled with asphalt,Marshall stability,and *** coupled neural networks were utilized to predict the volumetric and Marshall properties of asphalt *** predictive modeling,the SCNN model is employed,incorporating a three-layer neural network and preprocessing techniques to enhance accuracy and *** optimal network architecture,using the collected dataset,was a 2:6:5 structure,and the neural network was trained with 60%of the data,whereas the other 20%was used for cross-validation and testing *** network employed a hyperbolic tangent(tanh)activation function and a feed-forward *** to the results,the network model could accurately predict the volumetric and Marshall *** predicted accuracy of SCNN was found to be as high value>98%and low prediction errors for both volumetric and Marshall *** study demonstrates WTDC's potential as a low-cost,sustainable aggregate *** SCNN-based predictive model proves its efficiency and versatility and promotes sustainable practices.

关键词： Waste tire Neural network Sustainable practices Asphalt mixtures Predictive model

The research progress of an E//B neutral particle analyzer

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Plasma Science and Technology 2024年第3期26卷 10-16页

作者：马龙屈玉凡罗圆谢德豪汪彦熹王硕曲国峰任培培罗小兵刘星泉韩纪锋 Roy wada 林炜平臧临阁朱敬军 Key Laboratory of Radiation Physics and Technology of the Ministry of Education Institute of Nuclear Science and TechnologySichuan UniversityChengdu 610064People's Republic of China Southwestern Institute of Physics Chengdu 610064People's Republic of China Cyclotron Institute Texas A&M UniversityCollege StationTexas 77843United States of America

An E//B neutral particle analyzer(NPA)has been designed and is under development at Sichuan University and Southwestern Institute of *** main purpose of the E//B NPA is to measure the distribution function of fast ions in the HL-2A/3 *** E//B NPA contains three main units,*** stripping unit,the analyzing unit and the detection unit.A gas stripping chamber was adopted as the stripping *** results of the simulations and beam tests for the stripping chamber are *** electric and magnetic fields provided by a NdFeB permanent magnet and two parallel electric plates were designed and constructed for the analyzing *** calibration of the magnetic and electric fields was performed using a 50 kV electron cyclotron resonance ion source(ECRIS)*** detection unit consists of 32lutetium-yttrium oxyorthosilicate(LYSO)detector modules arranged in two *** response functions ofα,hydrogen ions(H^(+),H_(2)^(+)and H_(3)^(+))andγfor a detector module were measured with^(241)Am,^(137)Cs and^(152)Eu sources together with the 50 kV ECRIS *** overall results indicate that the designed E//B NPA device is capable of measuring the intensity of neutral hydrogen and deuteron atoms with energy higher than 20 keV.

关键词： E//B neutral particle analyzer gas stripping lutetium-yttrium oxyorthosilicate electron cyclotron resonance ion source platform

Research and development of electric vehicles for clean transportation

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Journal of Environmental Sciences 2009年第6期21卷 745-749页

作者： wada Masayoshi Department of Human-Robotics Faculty of DevelopmentSaitama Institute of Technology

This article presents the research and development of an electric vehicle（EV） in Department of Human-Robotics Saitama Institute of Technology,*** mobile systems developed in our laboratory include a converted electric automobile,electric wheelchair and personal mobile *** mobile systems contribute to realize clean transportation since energy sources and devices from all vehicles,i.e.,batteries and electric motors,does not deteriorate the *** drive motors for vehicle traveling,robotic technologies were applied.

关键词： electric vehicle robot technology converted electric vehicle clean transportation

Flow Structure Around the Intake of a Vertical Pump

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Journal of Thermal Science 2006年第2期15卷 121-125页

作者： Akihiro wada Research and Development Dept. Torishima Pump MFG. Co. Ltd. 1-1-8 Miyata-cho Takatsuki Osaka 569-8660 Japan

The flow structure around the intake of a vertical pump is investigated experimentally and numerically in order to obtain a guideline in designing the optimum shape of the intake of vertical pumps, in which their installation area is demanded to be minimum without losing the high performance. We concentrate our attention on the expansion ratio of the intake as a representative characteristic of the shape of the pumps and investigate the effect of the expansion ratio on pump performance. It is concluded that the optimum expansion ratio ranges in 1.1-1.2 if we take into consideration that the area needed for the installation of the pump should be minimum.

关键词： vertical pump shape of intake flow structure around the intake

Can early precut reduce post-endoscopic retrograde cholangiopancreatography pancreatitis in patients with difficult bile duct cannulation?

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World Journal of Gastrointestinal Endoscopy 2024年第9期16卷 519-525页

作者： Tomohiro Tanikawa Keisuke Miyake Mayuko Kawada Katsunori Ishii Takashi Fushimi Noriyo Urata Nozomu wada Ken Nishino Mitsuhiko Suehiro Miwa Kawanaka Hidenori Shiraha Ken Haruma Hirofumi Kawamoto Department of General Internal Medicine 2 Kawasaki Medical SchoolOkayama 7008505Japan

BACKGROUND Endoscopic retrograde cholangiopancreatography(ERCP)is associated with a variety of adverse events(AEs).One of the most important AEs is post-ERCP pancreatitis(PEP),which is most common in cases of difficult biliary *** the precut technique has been reported as a PEP risk factor,recent studies indicate that early precut could reduce PEP,and that precut itself is not a risk *** To evaluate the safety of the precut technique,especially in terms of *** We conducted a retrospective study,spanning the period from November 2011 through December *** included 1556 patients,aged≥20 years,who underwent their initial ERCP attempt for biliary disease with a naïve papilla at the Kawasaki University General Medical *** compared the PEP risk between the early precut and the delayed precut *** The PEP incidence rate did not significantly differ between the precut and nonprecut ***,the PEP incidence was significantly lower in the early precut group than the delayed precut group(3.5%vs 10.5%;P=0.02).The PEP incidence in the delayed precut group without pancreatic stent insertion(17.3%)was significantly higher compared to other cases(P<0.01).CONCLUSION Our findings indicate that early precut may reduce PEP *** the precut decision is delayed,a pancreatic stent should be inserted to prevent PEP.

关键词： Endoscopic retrograde cholangiopancreatography Post-endoscopic retrograde cholangiopancreatography pancreatitis Precut Needle-knife precut papillotomy

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中性粒子分析仪的研究现状

原子能科学技术 2024年第S2期58卷 501-511页

作者：林炜平马龙汪彦熹屈玉凡罗圆谢德豪王硕曲国峰任培培罗小兵刘星泉韩纪锋 Roy wada 臧临阁朱敬军四川大学原子核科学技术研究所辐射物理及技术教育部重点实验室四川成都610064 核工业西南物理研究院四川成都610218 Texas A&M University Texas USA 77843

中性粒子分析仪(NPA)作为托卡马克(Tokamak)装置的重要诊断工具,在等离子体物理研究中具有重要科学意义和广泛应用前景。NPA通过精确测量从等离子体中逃逸的中性粒子,可获取等离子体内部的关键信息,包括离子温度、快离子能谱分布和氢同... 详细信息

中性粒子分析仪(NPA)作为托卡马克(Tokamak)装置的重要诊断工具,在等离子体物理研究中具有重要科学意义和广泛应用前景。NPA通过精确测量从等离子体中逃逸的中性粒子,可获取等离子体内部的关键信息,包括离子温度、快离子能谱分布和氢同位素比例等。自20世纪60年代首台NPA问世以来,经过60余年的技术发展,其诊断能力已经实现了质的飞跃,并且发展出了多种类型的NPA。针对中国环流3号(HL-3)装置的快离子物理研究,四川大学与核工业西南物理研究院联合研制了基于LYSO+SiPM探测器的串联式平行电磁场结构的NPA(E//B NPA)。该E//B NPA已安装到HL-3装置,并在等离子体放电实验中成功测量到高能量氘(D)中性粒子能谱,为今后HL-3装置中性粒子诊断及快离子研究奠定了坚实的技术基础。

关键词：中性粒子分析仪能量和质量分辨托卡马克快离子物理