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宽带激光记录系统的声光调制器的改进

应用激光 1980年第3期 12-16页

作者： Y.Ohta m.sakaguchi 方正日本川崎电气公司中心研究实验室日本川崎电气公司中心研究实验室

引言最近已研制出具有清晰、高分辨率、高速记录的优点的各种激光记录系统。为了实现高速和宽带记录,重要的是研制许多具有良好性能的光学元件。在系统许多指标中,记录速度被记录介质的灵敏度、激光源的功率以及扫描、成像元件的光学效... 详细信息

引言最近已研制出具有清晰、高分辨率、高速记录的优点的各种激光记录系统。为了实现高速和宽带记录,重要的是研制许多具有良好性能的光学元件。在系统许多指标中,记录速度被记录介质的灵敏度、激光源的功率以及扫描、成像元件的光学效率所限制。记录的分辨率被光束斑点和调制器带宽所限制。电光调制器和声光调制器已被用来作激光记录系统的调制器。电光调制器具有高达100～200兆赫的宽带宽。但是,电光调制器既要对温度变化稳定,又需要高的驱动电压。而效率高的电光调制器由于它们自然双折射的改变而对温度变化是极其敏感的,它们不是那么合用的。

关键词：衍射光强声光上升时间宽带激光换能器带宽角分布分布(力学) 调制器激光记录光束发散度声束记录系统

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硫化锌结晶时的相变

发光学报 1978年第1期 22-26页

作者： m.sakaguchi ,罗晞

为了研究在ZnS结晶过程中立方→六角的相变,把ZnS微晶及含不同比例的CdS及Cu2S的ZnS微晶在He,HCl,H2S气氛或它们的混合气氛中分别于850℃或1150℃时加热:结晶中的立方含量用X—射线粉末衍射法检测。在所有的气氛中,当混合以一定数量的Cd... 详细信息

为了研究在ZnS结晶过程中立方→六角的相变,把ZnS微晶及含不同比例的CdS及Cu2S的ZnS微晶在He,HCl,H2S气氛或它们的混合气氛中分别于850℃或1150℃时加热:结晶中的立方含量用X—射线粉末衍射法检测。在所有的气氛中,当混合以一定数量的CdS时,在850℃能促进ZnS晶体的立方→六角相变。在HCl中,未混合的ZnS在开始阶段立方百分比很快地下降,超过半小时后又增加（“再相变》）:在混合样品中,立方百分比也是先下降的,但当增加CdS的含量时,再相变的程度是下降的:在H2S中,未混合的ZnS晶体保持立方,而在混合CdS时发生立方→六角的相变。用一高温X—射线衍射计测得（0.95）ZnS—（0.05）CdS样品的相变反应。其结果表明:对CdS立方峰的强度随温度而下降,并在550℃附近消失:而对固溶体,则在650℃附近出现六角峰。在混合Cu2S的ZnS微晶中,无论用的是什么气氛,在1150℃时立方→六角的相变因混合Cu2S而受抑制。

关键词： ZnS Cu CdS 相变点相变温度相变反应立方相混合气氛立方结构微晶晶体 HCI

血管造影显示冠状动脉全闭塞病人的T1WmRI上高信号与冠状动脉闭塞持续时间的关系

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国际医学放射学杂志 2017年第6期 737-737页

作者： K.matsumoto S.Ehara T.Hasegawa m.sakaguchi K.Shimada 张毓婧 Department of Cardiovascular medicine Osaka City University Graduate School of Medicine

摘要目的评估血管造影显示冠状动脉全闭塞（CTO）的病人冠状动脉闭塞持续时间与1.5 T T1W mRI上高信号（HIS）的关系。方法测量冠状动脉目标区的信号强度与邻近

关键词：冠状动脉 CTO T1WmRI 血管造影慢性完全闭塞持续时间

Velocity and Size of Droplets in Dense Region of Diesel Fuel Spray on Transient Needle Opening Condition

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Journal of Thermal Science 2005年第2期14卷 181-186页

作者： Hironobu UEKI masahiro ISHIDA Daisaku sakaguchi Nagasaki University 1-14 Bunkyo-machi Nagasaki 852-8521JapanNagasaki University 1-14 Bunkyo-machiNagasaki 852-8521JapanNagasaki University 1-14 Bunkyo-machiNagasaki 852-8521Japan

In order to investigate the effect of transient needle opening on early stage of spray behavior, simultaneous measurements of velocity and size of droplet were conducted by a newly developed laser 2-focus velocimeter (L2F). The micro-scale probe of the L2F was consisted of two foci with a distance of 36μm. The tested nozzle had a single hole with a diameter of 0.2 mm. The measurements of injection pressure, needle lift, and crank angle were synchronized with the spray measurement by the L2F at the position 10 mm downstream from the nozzle exit. It has been clearly shown that the velocity and size of droplet increase with needle valve opening and that the probability density distribution of droplet size can be fitted to the Nukiyama-Tanasawa distribution under the transient needle opening condition.

关键词：液滴分解光学特征激光2-聚焦速度计柴油机油料喷嘴

A User-friendly Living Cationic Polymerization: Degenerative Chaintransfer Polymerization of Vinyl Ethers by Simply Using mixtures of Weak and Superstrong Protonic Acids

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Chinese Journal of Polymer Science 2019年第9期37卷 851-857页

作者： mineto Uchiyama masataka sakaguchi Kotaro Satoh masami Kamigaito Department of molecular and macromolecular Chemistry Graduate School of Engineering Furo-cho Chikusa-ku Nagoya University

mixtures of a weak protonic acid and a trace amount of superstrong protonic acid were used for the simple control of the cationic polymerization of vinyl ethers via a degenerative chain-transfer mechanism, in which the former acid works as a precursor of the chain transfer agent (CTA) or the dormant species and the latter works as a source of the cationic propagating species. The addition of mixtures of phosphoric acid dibutyl ester ((n=BuO)2PO2H) or 1 -octanethiol (n-C8H17SH) and a trace amount of trifluoromethanesulfonic acid (TfOH) to a solution of isobutyl vinyl ether (IBVE) at -78℃ resulted in polymers with controlled molecular weights, which were basically determined by the feed ratio of IBVE to the weak protonic acid, and narrow molecular weight distributions (mw/mn≈ 1.1). These results were almost the same as those obtained using their prepared adducts of IBVE as CT As in the presence of a trace amount of TfOH under similar conditions. methanesulfonic acid (CH3SO3H), whose adduct of IBVE has not been isolated due to instability, was similarly used in conjunction with trace TfOH to result in controlled molecular weights but slightly broader mWDs (mw/mn = 1.2-1.8). These results indicate that the sulfoxonium ion is also an effective intermediate in the cationic DT polymerization in addition to the phosphonium and sulfonium intermediates derived from (n=BuO)2PO2H and C8H17SH, respectively. The simple living cationic polymerization was thus achieved by using a combination of a weak protonic acid and a trace amount of TfOH, which are both easily available, low cost, free from metal, and easy to handle, without need for preparation of the initiator.

关键词： Living cationic polymerization Degenerative chain transfer RAFT polymerization metal free Vinyl ether

Flow Range Enhancement by Secondary Flow Effect in Low Solidity Circular Cascade Diffusers

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Journal of Thermal Science 2014年第4期23卷 391-400页

作者： Daisaku sakaguchi min Thaw Tun Kanata mizokoshi Daiki Kishikawa Nagasaki Japan

High-pressure ratio and wide operating range are highly required for compressors and blowers. The technical issue of the design is achievement of suppression of flow separation at small flow rate without deteriorating the efficiency at design flow rate. A numerical simulation is very effective in design procedure, however, cost of the numerical simulation is generally high during the practical design process, and it is difficult to confirm the optimal design which is combined with many parameters. A multi-objective optimization technique is the idea that has been proposed for solving the problem in practical design process. In this study, a Low Solidity circular cascade Diffuser(LSD) in a centrifugal blower is successfully designed by means of multi-objective optimization technique. An optimization code with a meta-model assisted evolutionary algorithm is used with a commercial CFD code ANSYS-CFX. The optimization is aiming at improving the static pressure coefficient at design point and at low flow rate condition while constraining the slope of the lift coefficient curve. moreover, a small tip clearance of the LSD blade was applied in order to activate and to stabilize the secondary flow effect at small flow rate condition. The optimized LSD blade has an extended operating range of 114 % towards smaller flow rate as compared to the baseline design without deteriorating the diffuser pressure recovery at design point. The diffuser pressure rise and operating flow range of the optimized LSD blade are experimentally verified by overall performance test. The detailed flow in the diffuser is also confirmed by means of a Particle Image Velocimeter. Secondary flow is clearly captured by PIV and it spreads to the whole area of LSD blade pitch. It is found that the optimized LSD blade shows good improvement of the blade loading in the whole operating range, while at small flow rate the flow separation on the LSD blade has been successfully suppressed by the secondary flow ef

关键词：二次流动流量范围扩散器密实度多目标优化叶片扩压器设计流量粒子图像测速仪

measurement of droplet size distribution in core region of high-speed spray by micro-probe L2F

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Journal of Thermal Science 2008年第1期17卷 90-96页

作者： Daisaku sakaguchi Oluwo le Amida Hironobu Ueki masahiro Ishida Graduate School of Science and Technology Nagasaki University1-14 Bunkyo-machi Nagasaki 852-8521 JAPAN Faculty of Engineering Nagasaki University Professor

为了在柴油的核心区域调查微滴尺寸的分发，喷洒，微滴尺寸的即时测量被先进激光 2 焦点速度计(L2F ) 进行。L2F 的微规模的探查由二 foci 组成，在他们之间的距离是 36 μ m。测试的嘴有 0.2 公里直径单个洞。注射压力，针电梯，和曲... 详细信息

为了在柴油的核心区域调查微滴尺寸的分发，喷洒，微滴尺寸的即时测量被先进激光 2 焦点速度计(L2F ) 进行。L2F 的微规模的探查由二 foci 组成，在他们之间的距离是 36 μ m。测试的嘴有 0.2 公里直径单个洞。注射压力，针电梯，和曲柄角度的大小被 L2F 在位置与测量同步从嘴出口的 10 公里 downstream。比在在针下面的离开轴区域，完整的电梯调节并且微滴尺寸的空间分发改变速度集合，水花轴附近的微滴才大。在水花核心区域的微滴尺寸的概率密度分发能在大多数注射时期被适合到 Nukiyama-Tanasawa 分发，这被发现。

关键词：飞沫瓦解光学特征激光聚集速度计

Huge capacity spacial division multiplexing transmission and integrated optical switching technologies(Invited Paper)

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Chinese Optics Letters 2016年第12期14卷 12-16页

作者： Naoya Wada Ben J.Puttnam Ruben S.Luis Werner Klaus Jun sakaguchi Jose m.D.mendinueta Yoshinari Awaji Satoshi Shinada Hideaki Furukawa National Institute of Information and Communications Technology Tokyo 184-8795 Japan

We review the research and development of beyond Pb/s capacity space-division-multiplexed transmission technology using multi-core optical fibers for satisfying the ever-increasing traffic demand. moreover, we present an optical packet and circuit integrated network technology to improve switching capacity and flexibility in network nodes for the rapid traffic fluctuation and the data service diversification.

关键词： switching multiplexing satisfying fluctuation traffic packet frames transmit throughput overhead

Cell-Based microfluidic Device Utilizing Cell Sheet Technology

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Cyborg and Bionic Systems 2022年第1期2022卷 35-42页

作者： Katsuhisa sakaguchi Kei Akimoto masanori Takaira Ryu-ichiro Tanaka Tatsuya Shimizu Shinjiro Umezu Department of Integrative Bioscience and Biomedical Engineering Graduate School of Advaneed Science and Enginring TWInsWaseda University2-2 Wakamatsu-ChoShinju-KuTokyo 162-8480Japan Department of modern mechanical Engineering Graduate School of Creative Science and Engineering Waseda University 1-104 Totsuka-ChoShinju-KuTokyo 169-8555Japan Insttute of Advanced BiomedicalEngineering and Seience TWIns Tokyo Women's Medical University8-1 Kawada-ChoShinju-KuTokyo 162-8666Japan

The developmentof microelectromechanical systems hasresulted in the rapid development of polydimethylpolysiloxane(PDmS)microfluidic devices for drug screening *** cell functions,such as the response of endothelial cells to fluids,have beenelucdated using microuidic ***,organon-achip systems that includeorgans that are importantfor biologicalcirculation,such as the heart,liver,pancreas,kidneys,and brain,have been *** organs realize the biologicalcirculation system in a manner that cannot be reproduced by artificial organs;however,the flow channels between the organsare often artifically created by *** this study,we developeda microfluidic device consisting only of cels,by combiningcell sheet technology with microtitanium *** were placed between stacked fibroblast cellsheets,and the celisheets adhered to each other,afer which the microwires were removed leaving a luminal structure with a size approximatelyequal to the arteriolar *** lumen structure was constructed using wires with diameters of 50,100,150,and 200μm,which were approximations of the arteriole *** using a perfusion device,we successfully perfused theluminal structure created inside the *** results revealed that a aulture solution can be supplied toa cellsheet witha very high cell *** biofabrication technology proposed in this study can contribute to the development of organ-on-a-chip systems.

关键词： organs fluid diameters