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Characterization for Fusion Candidate Vanadium Alloys

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Plasma Science and Technology 2004年第4期6卷 2395-2399页

作者： T.Muroga T.nagasaka J.M.Chen Z.Y.Xu Q.Y.Huang Y.C.Wu NationalInstituteforFusionScience Toki509-5292Japan SouthwesternInstituteofPhysics Chengdu610041China InstituteofPlasmaPhysics ChineseAcademyofSciencesHefei230031China

This paper summarizes recent achievements in the characterization ofcandidate vanadium alloys obtained for fusion in the framework of the Japan-China Core UniversityProgram. National Institute for Fusion Science (NIFS) has a program of fabricating high-purityV-4Cr-4Ti alloys. The resulting products (NIFS-HEAT-1,2), were characterized by various researchgroups in the world including Chinese partners. South Western Institute of Physics (SWIP) fabricateda new V-4Cr-4Ti alloy (SWIP-Heat), and carried out a comparative evaluation of hydrogenembrittlement of NIFS-HEATs and SWIP-Heat. The tensile test of hydrogen-doped alloys showed that theNIFS-HEAT maintained the ductility to relatively high hydrogen levels. The comparison of the datawith those of previous studies suggested that the reduced oxygen level in the NIFS-HEATs should beresponsible for the increased resistance to hydrogen embrittlement. Based on the chemical analysisdata of NIFS-HEATs and SWIP-Heats, neutron-induced activation was analyzed in Institute of PlasmaPhysics (IPP-CAS) as a function of cooling time after the use in the fusion first wall. The resultsshowed that the low level of Co dominates the activity up to 50 years followed by a domination of Nbor Nb and Al in the respective alloys. It was suggested that reduction of Co and Nb, both of whichare thought to have been introduced via cross-contamination into the alloys from the molds usedshould be crucial for reducing further the activation.

关键词： vanadium alloys characterization nuclear fusion

Feasibility of gastric endoscopic submucosal dissection with continuous low-dose aspirin for patients receiving dual antiplatelet therapy

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World Journal of Gastroenterology 2019年第4期25卷 457-467页

作者： Hideaki Harada Satoshi Suehiro Daisuke Murakami Ryotaro Nakahara Takuya nagasaka Tetsuro Ujihara Ryota Sagami Yasushi Katsuyama Kenji Hayasaka Yuji Amano Department of Gastroenterology New Tokyo Hospital Department of Endoscopy New Tokyo Hospital

BACKGROUND Endoscopic submucosal dissection(ESD) for gastric neoplasms during continuous low-dose aspirin(LDA) administration is generally acceptable according to recent guidelines. This retrospective study aimed to investigate the effect of continuous LDA on the postoperative bleeding after gastric ESD in patients receiving dual antiplatelet therapy(DAPT).AIM To investigate the feasibility of gastric ESD with continuous LDA in patients with *** A total of 597 patients with gastric neoplasms treated with ESD between January2010 and June 2017 were enrolled. The patients were categorized according to type of antiplatelet therapy(APT).RESULTS The postoperative bleeding rate was 6.9%(41/597) in all patients. Patients were divided into the following two groups: no APT(n = 443) and APT(n = 154). APT included single-LDA(n = 95) and DAPT(LDA plus clopidogrel, n = 59)subgroups. In the single-LDA and DAPT subgroups, 56 and 39 patients were received continuous LDA, respectively. The bleeding rate with continuous singleLDA(10.7%) was similar to that with discontinuous single-LDA(10.3%)(P >0.99). Although the bleeding rate with continuous LDA in patients receiving DAPT(23.1%) was higher than that with discontinuous LDA in patients receiving DAPT(5.0%), no significant difference was observed(P = 0.141).CONCLUSION The bleeding rate with continuous LDA in patients receiving DAPT was not statistically different from that with discontinuous LDA in patients receiving DAPT. Therefore, continuous LDA administration may be acceptable for ESD in patients receiving DAPT, although patients should be carefully monitored for possible bleeding.

关键词： Dual antiplatelet therapy Endoscopic submucosal dissection Low-dose aspirin Postoperative bleeding Thienopyridine

Comparison the Performances of Three Earthing Systems for Micro-Grid Protection during the Grid Connected Mode

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Smart Grid and Renewable Energy 2011年第3期2卷 206-215页

作者： Rashad Mohammedeen Kamel Aymen Chaouachi Ken nagasaka 不详

This paper presents, tests and compares three earthing systems (TT, TN and IT) for Micro-Grid (MG) protection against various fault types during the connected mode. The main contribution of this work is including the models of all the micro sources which interfaced to the MG by power electronic inverters. Inverters in turns are provided with current limiters and this also included in the inverter models to exactly simulate the real situation in the MG during fault times. Results proved that the most suitable earthing system for MG protection during the connecting mode is the TN earthing system. That system leads to a suitable amount of fault current sufficient to activate over current protection relays. With using TN system, Touch voltages at the faulted bus and all other consumer’s buses are less than the safety limited value if current limiter is included with the transformer of the main grid which connects MG. For the two others earthing systems (TT and IT), fault current is small and nearly equal to the over load current which make over current protection relay can not differentiate between fault current and overload current. All models of micro sources, earthing systems, inverters, main grid and control schemes are built using Matlab?/Simulink? environment.

关键词： Micro Grid Protection Earthing Systems Fault Current Touch Voltage Micro Sources and Inverters Grid Connecting Mode

Quality of Service on Linux for the Atlas TDAQ Event Building Network

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International Conference on Computing in High Energy and Nuclear Physics 2001年第1期 656-659页

作者： Y.Yasu Y.nagasaka 等 HighEnergyAcceleratorResearchOrganization Japan HiroshimaInstituteofTechnology Japan

Congestion control for packets sent on a network is important for DAQ systems that contain an event builder using switching network *** of Service(QoS) is a technique for congestion *** Linux releases provide QoS in the kernel to manage network *** have analyzed the packet-loss and packet distribution for the event builder prototype of the Atlas TDAQ *** used PC/Linux with Gigabit Ethernet network as the *** result showed that QoS using CBQ and TBF eliminated packet loss on UDP/IP transfer while the UDP/IP transfer in best effort made lots of packet *** result also showed that the QoS overhead was *** concluded that QoS on Linux performed efficiently in TCP/IP and UDP/IP and will have an important role of the Atlas TDAQ system.

关键词： Atlas 数据处理数据流管理拥挤控制

Detailed Analysis of Micro-Grid Stability during Islanding Mode under Different Load Conditions

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Engineering（科研） 2011年第5期3卷 508-516页

作者： Rashad M. Kamel A. Chaouachi Ken nagasaka 不详

Today, several types of DGs are connected together and formed a small power system called micro-grid (MG). MG is connected to the primary distribution network and usually operates in normal connecting mode. When a severe fault occurs in the primary distribution network, then the MG will transfer to islanding mode. In this paper a complete model is developed to simulate the dynamic performance of the MG during and subsequent to islanding process. The model contains of a solid oxide fuel cell (SOFC), a single shaft micro turbine, a flywheel, two photovoltaic panels and a wind generator system. All these micro sources are con-nected to the MG through inverters except the wind generation system. The inverters are modeled with two control strategies. The first strategy is PQ control which the inverter will inject a certain active and reactive powers. This type of inverter is used to interface micro turbine, fuel cell and photovoltaic panels to the MG. The second strategy is Vf control. This model is used to interface flywheel will act as the reference bus (slack bus) for the MG when islanding occurs. Two cases are studied: the first case discusses the effect of islanding process on frequency, voltage and active power of all micro sources when the MG imports active and reactive power from the primary distribution network. The second studied case, also, shows the effect of islanding on the previous quantities particularly when the MG exports active and reactive power to the pri-mary distribution network. Results showed that the existence of storage device (flywheel) with appropriate control of its inverter can keep the frequency of the MG and the voltages of all buses within their limited levels. The developed model is built in Matlab? Simulink? environment.

关键词： MG Dynamic Performance Islanding Inverter and Distributed Generators

Design and Testing of Three Earthing Systems for Micro-Grid Protection during the Islanding Mode

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Smart Grid and Renewable Energy 2010年第3期1卷 132-142页

作者： Rashad M. Kamel Aymen Chaouachi Ken nagasaka 不详

This paper presents and tests three earthing systems (TT, TN and IT) for Micro-Grid (MG) protection against various fault types when the MG transferred to the islanding mode. The main contribution of this work is including the models of all micro sources which interfaced to the MG by power electronic inverters. Inverters in turns are provided with current limiters and this also included with the inverter models to exactly simulate the real situation in the MG during fault times. Results proved that the most suitable earthing system for MG protection during the islanding mode is the TN earthing system. That system leads to a suitable amount of fault current sufficient to activate over current pro-tection relays. With using TN earthing system, touch voltages at the faulted bus and all other consumer’s buses are less than the safety limited values during islanding mode. For the two others earthing systems (TT and IT), fault currents are small and nearly equal to the over load currents which make over current protection relay can not differentiate between fault currents and overload currents. All models of micro sources, earthing systems, inverters and control schemes are built using Matlab?/Simulink? environment.

关键词： Micro Grid Protection Earthing Systems Fault Current Touch Voltage Micro Sources and Inverters

CD14 upregulation as a distinct feature of non-alcoholic fatty liver disease after pancreatoduodenectomy

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World Journal of Hepatology 2013年第4期5卷 189-195页

作者： Daisuke Satoh Takahito Yagi Takeshi nagasaka Susumu Shinoura Yuzo Umeda Ryuichi Yoshida Masashi Utsumi Takehiro Tanaka Hiroshi Sadamori Toshiyoshi Fujiwara Department of Gastroenterological Surgery Transplantand Surgical OncologyOkayama University Graduate School of MedicineDentistry and Pharmaceutical SciencesOkayama 700-8558Japan Department of Pathology Okayama University Graduate School of MedicineDentistry and Pharmaceutical SciencesOkayama 700-8558Japan

AIM:To investigate the pathogenesis of non-alcoholic fatty liver disease(NAFLD)after pancreatoduodenectomy(PD).METHODS:A cohort of 82 patients who underwent PD at Okayama University Hospital between 2003 and 2009 was enrolled and the clinicopathological features were compared between patients with and without NAFLD after *** tomography(CT)images were evaluated every 6 mo after PD for *** steatosis was diagnosed on CT when hepatic attenuation values were 40 Hounsfield *** biopsy was performed for 4 of 30 patients with NAFLD after PD who consented to undergo *** compare NAFLD after PD with NAFLD associated with metabolic syndrome,liver samples were obtained from 10 patients with NAFLD associated with metabolic syndrome [fatty liver,n = 5;non-alcoholic steatohepatitis(NASH),n = 5] by percutaneous ultrasonography-guided liver ***-fluorescence immunohistochemistry was applied to examine CD14 expression as a marker of lipopolysaccharide(LPS)-sensitized macrophage cells(Kupffer cells)in liver biopsy ***:The incidence of postoperative NAFLD was 36.6%(30/82).Univariate analysis identified cancer of the pancreatic head,sex,diameter of the main pancreatic duct,and dissection of the nerve plexus as factors associated with the development of NAFLD after *** patients who developed NAFLD after PD demonstrated significantly decreased levels of serum albumin,total protein,cholesterol and triglycerides compared to patients without NAFLD after PD,but no glucose intolerance or insulin *** biopsy was performed in four patients with NAFLD after *** four patients showed moderate-to-severe steatosis and NASH was diagnosed in *** of cells positive for CD68(a marker of Kupffer cells)and CD14(a marker of LPSsensitized Kupffer cells)were counted in all biopsy *** number of CD68+ cells in specimens of NAFLD after PD was significantly increased from that in specimens of NAFLD associated with meta

关键词： Non-alcoholic fatty liver disease Pancreatoduodenectomy CD14 Endotoxin Kupffer cells

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基于节点能量和网络稳定性的节能路由协议

计算机工程与应用 2010年第21期46卷 79-81,89页

作者：陈永辉刘志勤 nagasaka 张春峰西南科技大学计算机科学与技术学院四川绵阳621010 广岛工业大学工学部信息技术工学科西南科技大学信息工程学院四川绵阳621010

在Ad hoc网络中,AODV等路由协议在选择路由路径时没有考虑节点的能量,可能造成部分节点的能量过度使用从而导致网络分割等问题。以AODV为基础,提出了一种基于节点剩余能量和网络稳定性的路由算法ECAODV。该算法在路由发现过程中,不仅要... 详细信息

在Ad hoc网络中,AODV等路由协议在选择路由路径时没有考虑节点的能量,可能造成部分节点的能量过度使用从而导致网络分割等问题。以AODV为基础,提出了一种基于节点剩余能量和网络稳定性的路由算法ECAODV。该算法在路由发现过程中,不仅要综合考虑路径上的节点的剩余能量和路由跳数,而且考虑路径中间节点对网络稳定性的影响。通过仿真验证该算法有较好的性能。

关键词：无线自组网剩余能量网络分割节点邻居集网络稳定性

The Recovery and Recrystallization of the Cold Rolled V-W-Ti Alloys

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Southwestern Institute of Physics Annual Report 2002年第1期 61-65页

作者： CHENJiming T.Muroga T.nagasaka1 XUYing XUZengyu 不详 NationalInstituteforFusionScience OroshiTokiGifu509-5292Japan

Vanadium alloys, especially that of V4Cr4Ti, are supposed as the promising candidate structural material for fusion applications for their good thermal properties, high temperature strength and the inherent low activa... 详细信息

关键词：再结晶冷轧铅合金回收再生结构材料核聚变防护