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Application of Simple Adaptive Control to Water Hydraulic Servo Cylinder System

Chinese Journal of Mechanical Engineering 2012年第5期25卷 882-888页

作者： ITO Kazuhisa yamada tsuyoshi IKEO Shigeru TAKAHASHI Koji College of Systems Engineering and Science Shibaura Institute of Technology Saitama 3378570 Japan Graduate School of Mechanical Engineering Tottori UniversityTottori 6808552 Japan Department of Mechanical Engineering Sophia UniversityTokyo 1028554 Japan

Although conventional model reference adaptive control （MRAC） achieves good tracking performance for cylinder control, the controller structure is much more complicated and has less robustness to disturbance in real applications. This paper discusses the use of simple adaptive control （SAC） for positioning a water hydraulic servo cylinder system. Compared with MRAC, SAC has a simpler and lower order structure, i.e., higher feasibility. The control performance of SAC is examined and evaluated on a water hydraulic servo cylinder system. With the recent increased concerns over global environmental problems, the water hydraulic technique using pure tap water as a pressure medium has become a new drive source comparable to electric, oil hydraulic, and pneumatic drive systems. This technique is also preferred because of its high power density, high safety against fire hazards in production plants, and easy availability. However, the main problems for precise control in a water hydraulic system are steady state errors and overshoot due to its large friction torque and considerable leakage flow. MRAC has been already applied to compensate for these effects, and better control performances have been obtained. However, there have been no reports on the application of SAC for water hydraulics. To make clear the merits of SAC, the tracking control performance and robustness are discussed based on experimental results. SAC is confirmed to give better tracking performance compared with PI control, and a control precision comparable to MRAC （within 10 μm of the reference position） and higher robustness to parameter change, despite the simple controller. The research results ensure a wider application of simple adaptive control in real mechanical systems.

关键词： water hydraulics servo cylinder system positioning control simple adaptive control

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Investigation on Retention and Release Behaviors of Hydrogen and Helium in Vanadium Alloy

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Plasma Science and Technology 2005年第3期7卷 2835-2838页

作者：刘翔 tsuyoshi yamada Yuji Yamauchi Yuko Hirohata Tomoaki Hino Nobuaki Noda Southwestern Institute of Physics Chengdu 610041 China Laboratory of Plasma Physics and Engineering Hokkaido UniversityKita-13 Nishi-8 Kita-ku Sapporo 060-8628 Japan National Institute for Fusion Science Toki-shi Gifu-ken 509-5202 Japan

Vanadium alloy is proposed as an attractive candidate for first wall and blanket structural material of fusion reactors. The retention and release behaviors of hydrogen and helium in vanadium alloy may be an important issue. In the present work, 1.7 keV deuterium and 5 keV helium ions are respectively implanted into V-4Cr-4Ti and V-4Ti at room temperature. The retention and release of deuterium and helium are measured with thermal desorption spectroscopy (TDS). When the helium ion fluence is larger than 3 × 1017 He/cm2, the retained helium saturates with a value of approximately 2.5 ×1017 He/cm2. However, when the ion fluence is 1×1019 D/cm2, the hydrogen saturation in vanadium alloy does not take place. Experimental results indicates that hydrogen and helium retention in vanadium alloy may lead to serious problems and special attention should be paid when it is applied to fusion reactors.

关键词： deuterium helium vanadium alloy thermal desorption spectroscopy retention and release

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Application of simple adaptive control to water hydraulic servo cylinder system

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材料与冶金学报 2010年第4期9卷 300-303页

作者： tsuyoshi yamada Kazuhisa ITO Shigeru IKEO Masaharu NISHIMURA Graduate School of Engineering Tottori University 4 - 101 Minami Koyama - cho Tottori Japan Department of Machinery ＆ Control Systems College of Systems Engineering and Science Shibaura Institute of Technology 307 Fukasaku Saitama Japan Department of Mechanical Engineering Sophia University 7 - 1 Kioicho Chiyodaku Tokyo Japan

In this research, the positioning control of water hydraulic servo cylinder system with the simple adaptive control (SAC) is discussed. Conventional model reference adaptive control (MRAC) also achieves good tracking performance for cylinder control, but the controller structure was much complicated and was not easy to be realized in application. Compared with MRAC, SAC has simpler and lower order structure, i.e., has higher feasibility. But only few papers concerning with the application of the control performance of SAC to hydraulics and pneumatics are available, especially for water hydraulics. In this paper, we will examine and evaluate the control performance of the SAC strategy and it is confirmed that SAC gives better tracking performance compared with PI control.

关键词： water hydraulics servo cylinder system position control simple adaptive control

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Salvage brachytherapy for locally recurrent prostate cancer after external beam radiotherapy

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Asian Journal of Andrology 2015年第6期17卷 899-903页

作者： Yasuhiro yamada Koji Okihara tsuyoshi Iwata Koji Masui Kazumi Kamoi Kei yamada Tsuneharu Miki Department of Urology Kyoto Prefectural Universityof Medicine Kyoto Japan Department of Radiology Kyoto Prefectural University of Medicine KyotoJapan

External beam radiotherapy （EBRT） is a standard treatment for prostate cancer. Despite the development of novel radiotherapy techniques such as intensity-modulated conformal radiotherapy, the risk of local recurrence after EBRT has not been obviated. Various local treatment options （including salvage prostatectomy, brachytherapy, cryotherapy, and high-intensity focused ultrasound [HIFU]） have been employed in cases of local recurrence after primary EBRT. Brachytherapy is the first-line treatment for low-risk and selected intermediate-risk prostate tumors. However, few studies have examined the use of brachytherapy to treat post-EBRT recurrent prostate cancer. The purpose of this paper is to analyze the current state of our knowledge about the effects of salvage brachytherapy in patients who develop locally recurrent prostate cancer after primary EBRT. This article also introduces our novel permanent brachytherapy salvage method.

关键词： Salvage brachytherapy radiotherapy

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A successful birth of severe secondary recurrent miscarriage case after a decline of phosphatidylserine-dependent anti-prothrombin antibody by intravenous immunoglobulin administration

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Open Journal of Obstetrics and Gynecology 2012年第2期2卷 156-160页

作者： Mika Kanaya Kunihiko Nagasawa tsuyoshi Baba Shinichi Ishioka Hideto yamada Toshiaki Endo tsuyoshi Saito Department of Obstetrics and Gynecology School of Medicine Kobe University Kobe Japan Department of Obstetrics and Gynecology School of Medicine Sapporo Medical University Sapporo Japan Mika Ladies Clinic Sapporo Japan

A 33 years old woman was referred to our hospital since her sixth pregnancy had been revealed. In fact, at 19 years of age she had diagnosed as having systemic lupus erythematosus without organ failure. In addition, she had a past history of uncontrollable severe pregnancy-induced hypertension occurred during the second pregnancy, resulting in extremely premature delivery and following postpartum HELLP syndrome. It was so severe that we employed administration of dexamethasone and plasma exchange to ameliorate a life-threatening situation. In the course of her recovery it was revealed that she had been complicated with antiphospholipid antibodies, and at the same time we observed that phosphatidylserine-dependent anti-prothrombin antibody IgG levels were declining as her condition was getting better. There-after, she became pregnant three times, but all pregnancies ended in miscarriage despite administration of prednisolone and anticoagulant therapy. Therefore, we realized that her recurrent miscarriages could not be prevented with generally acceptable therapies, so we tried intravenous immunoglobulin shortly after fetal heart beats were detected. In fact, her sixth pregnancy was going well, but we had to terminate it at the 35th week of gestation due to the onset of HELLP syndrome-like condition. However, she could achieve an almost intact pregnancy outcome without neonatal complications or persistently worsening postpartum HELLP syndrome-like condition. Considering the etiologic relation overlapping between systemic lupus erythematosus, antiphospholipid syndrome and recurrent miscarriage, intravenous immunoglobulin can be one of the treatment options for severe secondary recurrent miscarriage, although the evidence of the treatment is always certain. In addition, a decline of phosphatidylserine-dependent anti-prothrombin antibody IgG levels we observed in this case may represent its therapeutic immunomodulatory effects.

关键词： Antiphospholipid Antibody Antiphospholipid Syndrome Intravenous Immunoglobulin Recurrent Miscarriage Systemic Lupus Erythematosus

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High-density and wide-bandwidth optical interconnects with silicon optical interposers [Invited]

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Photonics Research 2014年第3期2卷 S0001-S0007页

作者： Yutaka Urino Tatsuya Usuki Junichi Fujikata Masashige Ishizaka Koji yamada tsuyoshi Horikawa Takahiro Nakamura Yasuhiko Arakawa Institute for Photonics-Electronics Convergence System Technology(PECST) Japan Photonics Electronics Technology Research Association(PETRA) West 7 SCR16-1 OnogawaTsukubaIbarakiJapan National Institute of Advanced Industrial Science and Technology West 7 SCR16-1 OnogawaTsukubaIbarakiJapan Institute of Industrial Science The University of Tokyo4-6-1KomabaMeguroTokyoJapan

One of the most serious challenges facing exponential performance growth in the information industry is the bandwidth bottleneck in interchip *** propose a photonics–electronics convergence system in response to this *** demonstrate the feasibility of the system,we fabricated a silicon optical interposer integrated with arrayed laser diodes,spot-size converters,optical splitters,optical modulators,photodetectors,and optical waveguides on a single silicon *** this system,20 Gbps error-free data links and a 30 Tbps∕cm2 bandwidth density were *** bandwidth density is sufficient to meet the interchip interconnect requirements for the late 2010s.

关键词： optical system exponential

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Effects of PBr<sub>3</sub>Addition to Polysilane Thin Films on Structures and Photovoltaic Properties

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Green and Sustainable Chemistry 2017年第1期7卷 20-34页

作者： Junya Nakagawa Takeo Oku Atsushi Suzuki tsuyoshi Akiyama Masahiro yamada Sakiko Fukunishi Kazufumi Kohno Department of Materials Science The University of Shiga Prefecture Hikone Japan Osaka Gas Co. Ltd. Osaka Japan Osaka Gas Chemicals Co. Ltd. Osaka Japan

Organic thin film solar cells are potential next generation solar cells. Many p-type semiconductors have been used in organic solar cells, but there have been far fewer reports involving n-type organic semiconductors. Developing new n-type organic semiconductors is therefore desirable. Polysilane thin films were spin-coated from solutions containing phosphorus (P), and the effects of P addition on film microstructures and electronic properties as n-type semiconductors were investigated. Microstructures of poly-methyl-phenyl-silane (PMPS), dimethyl-polysilane (DMPS) and deca-phenyl-penta-silane (DPPS) thin films were investigated by X-ray diffraction and transmission electron microscopy. PMPS thin films doped with P (PMPS(P)) were amorphous upon annealing at 300°C, while DMPS(P) and DPPS(P) thin films exhibited crystalline structures. PMPS(P) and DMPS(P) thin films exhibited decreased electrical resistances upon P doping. The energy gaps of PMPS(P), DMPS(P) and DPPS(P) were 3.5, 3.9 and 3.8 eV, respectively. Decreased photoluminescence intensities of PMPS, DMPS and DPPS were observed upon P doping. The desorption of phenyl and methyl groups from PMPS(P) thin films was observed from Raman scattering measurements. Solar cells containing polysilane(P)/poly[3-hexylthiophene] heterojunction structures were fabricated and exhibited photovoltaic behavior.

关键词： Microstructure Thin Film Property Polysilane Solar Cell

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Fabrication and Characterization of Poly[Decaphenylcyclopentasilane]-Based Solar Cells

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Advances in Materials Physics and Chemistry 2012年第3期2卷 121-125页

作者： Makoto Iwase Takeo Oku Atsushi Suzuki tsuyoshi Akiyama Katsuhisa Tokumitsu Masahiro yamada Mika Nakamura Department of Materials Science The University of Shiga Prefecture Hikone Japan Osaka Gas Chemicals Co. Ltd. Osaka Japan

Poly[decaphenylcyclopentasilane] (PDPS)-based photovoltaic cells were fabricated by using mixture solution of PDPS including boron and phosphorous elements. A doping effect of phosphorus and boron into PDPS was investigated on the performance of the photovoltaic devices. The solar cell provided short-circuit current density of 0.11 mA/cm2 and open-circuit voltage of 0.81 V under simulated sunlight. Microstructural analysis indicated that PDPS had an amor-phous structure, which would result in the photovoltaic properties.

关键词： PDPS Polysilane Solar Cell Amorphous Silicon

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18F-FDG PET放射组学:宫颈癌中不同亚型的比较和聚类特征

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中华核医学与分子影像杂志 2018年第5期38卷 378-379页

作者：李慧玲兰晓莉 Tetsuya Tsujikawa Tasmiah Rahman Makoto Yamamoto Shizuka yamada Hideaki tsuyoshi Yasushi Kiyono Hirohiko Kimura Yoshio Yoshida Hidehiko Okazawa 华中科技大学同济医学院附属协和医院核医学科 Biomedical Imaging Research Center University of Fukui

目的找出可反映宫颈癌亚型不同组织结构的;F-脱氧葡萄糖（FDG）PET/CT纹理特征,并对宫颈癌中;F-FDG PET纹理特征的关联性进行视觉评估。方法纳入83例在治疗前行;FFDG PET/CT检查的宫颈癌患者,其中62例鳞状细胞癌（SCC）、21例非鳞状细... 详细信息

目的找出可反映宫颈癌亚型不同组织结构的;F-脱氧葡萄糖（FDG）PET/CT纹理特征,并对宫颈癌中;F-FDG PET纹理特征的关联性进行视觉评估。方法纳入83例在治疗前行;FFDG PET/CT检查的宫颈癌患者,其中62例鳞状细胞癌（SCC）、21例非鳞状细胞癌（NSCC）。对PET/CT图像进行纹理分析,从中提取出18个PET放射组学特征,包括标准摄取值（SUV）、肿瘤代谢体积（MTV）和病灶糖酵解总量（TLG）等一级特征,二级以及高级结构特征分别为SUV直方图、归一化灰度共生矩阵（NGLCM）和局部灰度差分矩阵。使用Bonferroni校正P值0.002 8（0.05/18）来比较SCC和NSCC间这些特征的差异。用层次聚类的热图分析方法来评估PET特征之间的关联性。结果在18个PET特征中,相关性（NGLCM的二级纹理特征）是稳定的参数,并且是SCC和NSCC之间差异有统计学意义的唯一特征。SCC的相关性（0.70±0.07）显著高于NSCC（0.64±0.07,P=0.003 0）。其他PET特征在SCC和NSCC间无明显差异。与NSCC相比,SCC的高度相关性可能反映出癌细胞的结构完整性和更强的空间/线性关系。对PET特征进行热图分析,清晰显示出5个不同的群集,其中相关性与MTV、TLG属于一个群集,但相关性与他们的关联不强。相关性是宫颈癌相对独立的PET特征。结论;F-FDG PET纹理特征可能反映宫颈癌亚型间组织学结构差异。PET放射组学的方法揭示了PET特征间的关联性,并有助于发现单一特征或这些特征的组合,从而便于精确诊断、确定潜在的预后模型和有效的治疗策略。

关键词： PET 纹理特征宫颈癌放射组学

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