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Small-diameter vertical shafts constructed in the shallow space of steep mountainous areas

Underground Space 2019年第3期4卷 235-250页

作者： T.Hara a.yashima K.Sawada K.Kariya H.Tsuji N.Soga University of Toyama Japan Gifu University Japan Eight Kogyo Co.Ltd. Japan

Japan is a mountainous country comprising several islands,in which mountains occupy 70%of the entire ***,numerous transmission line towers have been constructed in the shallow space of steep mountainous *** such construction,monorails and/or cableways are generally used to transport materials and equipment to the construction site instead of using a construction road,as the former method is more economically ***,with this method,drill rigs or vertical shaft sinking machines cannot be transported to the *** small-diameter vertical shafts of 2.5 or 3.0 m as the foundation for high-voltage transmission line towers in mountainous areas are traditionally constructed manually in *** the past two decades,however,dangerous and poor environmental conditions for workers regarding the manual construction of these small-diameter vertical shafts have become a major ***,owing to the poor environmental conditions of small-diameter vertical shafts to be constructed in the shallow space of steep mountainous areas,a decrease has occurred in the number of young workers entering these ***,the construction of transmission line towers with using the manually traditional small-diameter vertical shafts is becoming difficult in Japan from abovementioned *** development of a new technology to solve the problems is necessary for Japan’s economic *** this knowledge,the authors have developed a new small-diameter vertical shaft construction system,in which workers do not have to enter the vertical shaft during construction,as machines are used *** applicability of the proposed system was confirmed by means of the construction of three actual vertical shafts at two construction sites,as well as in factory and field *** applicability and details of the final proposed system are summarized in this paper.

关键词： Small-diameter vertical shaft Shallow space Steep mountainous area

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A case study of seismic response of earth embankment foundation on liquefiable soils

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Journal of Central South University 2009年第6期16卷 994-1000页

作者：黄雨 yashima A SAWADA K 张锋 Department of Geotechnical Engineering Tongji University Key Laboratory of Geotechnical and Underground Engineering Ministry of EducationTongji University Department of Civil Engineering Gifu University Department of Civil Engineering Nagoya Institute of Technology

A case study of seismic response of an earth embankment foundation on liquefiable soils in Kansai area,western Japan was presented. Based on a calibrated cyclic elasto-plastic constitutive model for liquefiable sand and Biot dynamic coupled theory,the seismic analysis was carried out by using a dynamic effective stress finite element method under plane strain condition. A recent design study was illustrated in detail for a river earth embankment subjected to seismic excitation on the saturated deposits with liquefiable sands. Simulated results of the embankment foundation during liquefaction were obtained for acceleration,displacement,and excess pore water pressures,which were considered to yield useful results for earthquake geotechnical design. The results show that the foundation soil reaches a fully liquefied state with high excess pore pressure ratios approaching to 1.0 due to the earthquake shaking. At the end of the earthquake,the extensive liquefaction causes about 1.0 m lateral spreading at the toe and 60 cm settlement at the crest of the earth embankment.

关键词： earth embankment earthquake liquefaction cyclic plasticity finite element method case study

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Towards a sustainable technology for production of extra-pure Ti metal:Electrolysis of sulfurized Ti(C,N)in molten CaCl_(2)

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International Journal of Minerals,Metallurgy and Materials 2020年第12期27卷 1635-1643页

作者： Eltefat Ahmadi Ryosuke O.Suzuki Tatsuya Kikuchi Takumi Kaneko Yuta.yashima Division of Materials Science and Engineering Faculty of EngineeringHokkaido UniversitySapporo 060-8628Japan Japan Society for the Promotion of Science(JSPS) Tokyo 102-0083Japan

A new concept for producing highly pure Ti metal powder from ilmenite(FeTiO)_(3))is proposed in this *** nitride(TiN)or titanium oxycarbonitride(TiO_(x)C_(y)N_(z))could be synthesized in the first step via the simultaneous carbothermal reduction and nitridation(CTRN)of FeTiO3 to remove oxygen *** separate oxygen completely,high-quality TiS2 samples were then synthesized from TiN and TiC using S2 gas,and the clean sulfides were finally reduced toα-Ti powders with spherical morphology using electrolysis in molten CaCl_(2).Xray diffraction(XRD),scanning electron microscopy(SEM)in conjunction with energy-dispersive X-ray spectroscopy(EDS),and elemental LECO analysis were used to study the phases and microstructures of the sulfides and the electrochemically reduced *** Ti powder showed no carbon contamination and consisted of high-purity foil-like Ti sheets with very low oxygen,carbon,and nitrogen contents of less than 0.15 wt%O,0.02 wt%C,and 0.003 wt%N,*** quality of the Ti powder was much higher than that of the powder obtained using the conventional OS process(proposed by *** and ***)starting directly from the oxides.

关键词： titanium molten salt electrolysis sulfidation titanium oxycarbonitride ilmenite

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The Microstructure and Mechanical Behavior Evaluation of Ce-TZP/Al_(2)O_(3)Nanocomposites

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材料热处理学报 2004年第5期25卷 139-142页

作者： YANGGang LIJun-chu WANGGao-chao M.yashima MINGSi-lin YUJi-liang DepartmentofMaterialsScienceandEngineering NanchangInstituteofAeronauticalTechnologyNanchangChina MaterialsandStructuresLaboratory TokyoInstituteofTechnologyYokohama226Japan

Ce-TZP/Al2O3 nanocomposites were prepared from mixture of self-made Ce-TZP nanometer powder and commercial A12O3 powder by hot-pressing method. Influences of nanometer ZrO2 particles on the mechanical properties and microstructure of Ce-TZP/Al2O3 ceramics were investigated. Meanwhile, t-—m transformation toughening mechanism was investigated by x-ray diffractometry (XRD) method, and deflection of samples under applied stress were recorded too. The results show that when the percentage of ZrO2 was 20%, the mechanical properties and microstructures of materials were preferential. Additionally, TEM observation show that dislocation structures form both in the A12O3 grain and on the A12O3 grain boundary.

关键词：显微结构纳米复合物机械特征韧化热处理 Ce-TZP/Al2O3

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Expression of AID, P53, and Mlh1 proteins in endoscopically resected differentiated-type early gastric cancer

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World Journal of Gastrointestinal Oncology 2012年第6期4卷 131-137页

作者： Yohei Takeda Kazuo yashima Akihiro Hayashi Shuji Sasaki Koichiro Kawaguchi Kenichi Harada Yoshikazu Murawaki Hisao Ito Division of Medicine and Clinical Science Faculty of Medicine Tottori University Division of Organ Pathology Faculty of Medicine Tottori University

AIM: To analyze the expression of the tumor-related proteins in differentiated-type early gastric carcinoma (DEGC) samples. METHODS: Tumor specimens were obtained from 102 patients (75 males and 27 females) who had received an endoscopic tumor resection at Tottori University Hospital between 2007 and 2009. Ninety-one cancer samples corresponded to noninvasive or intramucosal carcinoma according to the Vienna classification system, and 11 samples were submucosal invasive carcinomas. All of the EGCs were histologically differentiated carcinomas. All patients were classified as having Helicobacter pylori (H. pylori) infections by endoscopic atrophic changes or by testing seropositive for H. pylori IgG. All of the samples were histopathologically classified as either tubular or papillary adenocarcinoma according to their structure. The immunohistochemical staining was performed in a blinded manner with respect to the clinical information. Two independent observers evaluated protein expression. All data were statistically analyzed then. RESULTS: The rates of aberrant activation-induced cytidine deaminase (AID) expression and P53 overexpression were both 34.3% in DEGCs. The expression of Mlh1 was lost in 18.6% of DEGCs. Aberrant AID expression was not significantly associated with P53 overexpression in DEGCs. However, AID expression was associated with the severity of mononuclear cell activity in the non-cancerous mucosa adjacent to the tumor (P = 0.064). The rate of P53 expression was significantly greater in flat or depressed tumors than in elevated tumors. The frequency of Mlh1 loss was significantly increased in distal tumors, elevated gross-type tumors, papillary histological-type tumors, and tumors with a severe degree of endoscopic atrophic gastritis (P < 0.05). CONCLUSION: Aberrant AID expression, P53 overexpression, and the loss of Mlh1 were all associated with clinicopathological features and gastric mucosal alterations in DEGCs. The aberrant expression of AID p

关键词： Gastric cancer Activation-induced cytidine deaminase P53 Mlh1 Endoscopic resection

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高清晰度电视信号用外插内插预测编码方法

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电讯技术 1992年第1期32卷 81-88页

作者： YOSHIYUKI yashima 赵建国

本文介绍了一种高清晰度电视(HDTV)信号的数字传输用高效编码方法。由于HDTV信号的带宽宽,所以存在两个主要问题:一是HDTV信号的随机噪声比传统电视信号的大,因而导致编码的效率下降;二是需要很高的取样频率。这样,就限制了编码算法的... 详细信息

本文介绍了一种高清晰度电视(HDTV)信号的数字传输用高效编码方法。由于HDTV信号的带宽宽,所以存在两个主要问题:一是HDTV信号的随机噪声比传统电视信号的大,因而导致编码的效率下降;二是需要很高的取样频率。这样,就限制了编码算法的硬件实现。因此,本文提出两种技术来解决这些问题:第一是时空自适应滤波器,用它可降低随机噪声并改善编码效率;第二是具有自适应内场/帧间预测的外插和内插编码算法,这种算法消除了因高的取样频率引起的问题并保证了高效编码性能。

关键词：数字信号编码技术高清晰度电视

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Study on Neutron Capture Cross Secitons of MA and LLFP Nuclei Using Various Detectors

Study on Neutron Capture Cross Secitons of MA and LLFP Nucle...

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作者： J.Hori H.yashima Research Reactor Institute Kyoto University

INTRODUCTION:Accurate neutron capture cross section data of minor actinides(MAs) and long-lived fission products(LLFPs) are required for the study of transmutation ***,accurate measurement of these nuclei is a very difficult task due to high radioactivity and/or low isotopic purity of *** overcome these difficulties,it is important to select a detector suitable for the objective nuclide. In the case of MA with a high radioactivity,we have selected a pair of C6D6 detectors characterized by a small

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Mapping of QTL for salt tolerance in rice(Oryza sativa L.)via molecular markers

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Rice Science 1997年第4期 1-2页

作者： T.Senboku S.yashima Okinawa Subtropical Station Japan International Res Center of Agri SciIshigaki 907OkinawaJapan

A recombination inbred(RI)population was developed by single seed decent from a combi- nation,Tesanai 2/*** parents and 142 Flines were planted for RFLP analysis,and Fseeds were harvested for evaluation of salt ***-hu... 详细信息

关键词： QTL RFLP Mapping of QTL for salt tolerance in rice Oryza sativa L via molecular markers

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液化场地桩-土-结构动力相互作用的有限元分析

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岩土工程学报 2005年第6期27卷 646-651页

作者：黄雨八嶋厚张锋同济大学地下建筑与工程系上海200092 日本国立岐阜大学工学部日本国立名古屋工业大学都市社会工学科

基于Biot两相饱和多孔介质动力耦合理论,采用有效应力方法对液化场地桩基础的地震反应进行了三维有限元分析。在饱和液化砂土的循环塑性模拟中,采用了超固结边界面、Armstrong-Frederick型非线性运动硬化准则和非关联流动准则来描述动... 详细信息

基于Biot两相饱和多孔介质动力耦合理论,采用有效应力方法对液化场地桩基础的地震反应进行了三维有限元分析。在饱和液化砂土的循环塑性模拟中,采用了超固结边界面、Armstrong-Frederick型非线性运动硬化准则和非关联流动准则来描述动荷载作用下砂土的循环活动性以及液化强度等特性。对于桩的动力本构行为,则采用了可以考虑体积效应和轴向力影响的梁—柱单元来模拟。以某城市高架桥的实际工程为例,应用该方法对地基液化时桩—土—结构的动力相互作用进行了计算分析,并得到了一些有用的结论。

关键词：地震液化桩-土-结构动力相互作用本构模型动力耦合分析有限元

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Mapping of QTL for salt tolerance in rice (Oryza sativa L. ) via molecular markers

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Chinese Rice Research Newsletter 1997年第4期5卷 1-2页

作者： LINHongxuan S.Yangihara ZHUANGJieyun T.Senboku ZHENGKangle S.yashima CNRRI Hangzhou310006China OkinawaSubtropicalStation JapanInternationalResCenterofAgriSciIshigaki907OkinawaJapan

A recombination inbred (RI) population was developed by single seed decent from a combi-1/3 of the standard concentration (500 μg Au and 1 μg DNA per bombardment). (2) The number of Basta\' calli obtained after bombarded with 900psi Helium was higherthan that of 1100psi Helium, and callus quality of the former was much better than the latter in subculture. (3)The differenc between one bombardment per plate and two bombardments was not significant. (4) The number of Basta\'calli produced from calli induced from immature embryos were much higher than those from direct bombardment of the immature embryos.

关键词： molecular marker Quantitative Trait Loci Oryza sativa BOMBARDMENT helium Embryo Genetic Markers phosphinothricin salt tolerance

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