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| 1 | DNA damaging agent-induced autophagy produces a cytoprotective adenosine triphosphate surge in malignant glioma cells显示文摘 | Katayama M Kawaguchi T Berger MS Pieper RO | 2007 | 中国神经肿瘤杂志2007，5，4： | 28 |
| 2 | 大功率光纤激光焊熔池形态及焊接稳定性分析显示文摘在大功率光纤激光焊接过程中,熔池热辐射含有丰富的焊接质量信息,熔池形态及其变化特征与焊接稳定性密切相关.研究一种基于红外热像的大功率光纤激光深熔焊熔池形态分析及焊缝质量稳定性评价的方法.以10 kW大功率光纤连续激光焊接304不锈钢为试验对象,应用近红外传感高速摄像机摄取熔池动态热像,通过动态自动阈值和数学形态学方法重点分析熔池和匙孔形态以及对应的焊缝宽度变化,以熔池宽度、匙孔面积和匙孔宽度作为熔池形态参数,焊缝宽度作为衡量焊接过程稳定性的参数,研究熔池形态参数与焊接稳定性的关联.结果表明,通过熔池形态参数能够较准确地反映大功率光纤激光焊接过程的稳定性. | 高向东 张勇 游德勇 Katayama Seiji | 2011 | 焊接学报2011，32，9： | 16 |
| 3 | 大功率盘形激光焊飞溅特征分析显示文摘焊接过程的在线监控是保证激光焊接质量的关键,为此,首先要找到焊接过程传感特征量变化规律以及与焊缝质量间的关系.飞溅是大功率盘型激光焊接过程中的一个重要现象,其特征与焊接质量、焊接过程稳定性以及能量利用率等有着密切的联系.以大功率盘形激光焊接304不锈钢为试验对象,研究焊接过程中的飞溅特征.在紫外波段和可见光波段应用高速摄像机摄取焊接过程中产生飞溅的瞬态特征,通过计算机图像处理技术分析飞溅的数量、面积、行程和质心高度特征参量.以焊件熔宽作为衡量焊接质量与焊接过程稳定性的因素,对飞溅特征量进行线性和高次拟合,研究飞溅特征参量的波动规律,并与焊件熔宽的变化对比,探索焊接过程的飞溅特征参量变化规律.试验结果表明,根据飞溅特征量变化规律能够对大功率盘形激光焊接304不锈钢板焊接质量做出动态评估,为实现焊接质量的在线监控提供了试验依据. | 高向东 龙观富 汪润林 Katayama Seiji | 2012 | 物理学报2012，61，9： | 15 |
| 4 | 大功率光纤激光焊焊缝跟踪偏差测量新方法显示文摘针对大功率光纤激光焊,分析一种基于近红外图像识别的焊缝跟踪偏差测量新方法.通过高速摄像机获取动态熔池近红外图像序列,分析熔池近红外图像的灰度分布特性,利用图像灰度梯度提取熔池温度分布参数.该参数能够体现激光束偏离焊缝时熔池表面温度的变化特性.以熔池温度分布参数作为特征测量值,利用最小二乘法建立焊缝路径与激光束偏离的近红外视觉模型.结果表明,该模型能够准确地反映熔池温度分布参数与焊缝跟踪偏差之间的数学关系. | 高向东 游德勇 Katayama Seiji | 2011 | 焊接学报2011，32，5： | 11 |
| 5 | 大功率光纤激光焊焊缝跟踪偏差红外检测方法显示文摘精确控制激光束使其始终对准并跟踪焊缝是保证激光焊接质量的前提.针对大功率(激光功率10kW)光纤激光焊接304型不锈钢紧密对接焊缝(间隙为0—0.1mm),研究一种基于红外热像的焊缝跟踪偏差检测新方法.采用红外传感高速摄像机摄取焊接区域熔池红外动态热像,分析激光束对准和偏离焊缝中心时的熔池温度分布和红外辐射特性,以熔池匙孔形变参数和热堆积效应参数作为激光束与焊缝中心偏差检测特征值,通过图像识别技术研究和分析特征值与焊缝偏差之间的关系.激光焊接试验结果表明,熔池匙孔形变参数和热堆积效应参数与焊缝偏差之间存在密切的数学关联,能有效判断和检测激光束与焊缝之间的偏差. | 高向东 莫玲 仲训杲 游德勇 Katayama Seiji | 2011 | 物理学报2011，60，8： | 8 |
| 6 | Study of Dynamic Features of Surface Plasma in High-Power Disk Laser Welding显示文摘High-speed photography was used to obtain the dynamic changes in the surface plasma during a high-power disk laser welding process.A color space clustering algorithm to extract the edge information of the surface plasma region was developed in order to improve the accuracy of image processing.With a comparative analysis of the plasma features,i.e.,area and height,and the characteristics of the welded seam,the relationship between the surface plasma and the stability of the laser welding process was characterized,which provides a basic understanding for the real-time monitoring of laser welding. | 王腾 高向东 Katayama SEIJI 金小莉 | 2012 | Plasma Science and Technology2012，14，3： | 8 |
| 7 | 焊缝偏差RBF神经网络预测算法显示文摘以10 kW大功率光纤激光焊接304奥氏体不锈钢板为试验对象,研究一种焊缝偏差预测算法.利用红外摄像机摄取焊接过程中的熔池红外图像,提取匙孔质心、匙孔形状参数和热堆积效应参数等反映激光束与焊缝位置偏差的特征量作为径向基函数RBF神经网络预测模型的输入量,建立焊缝偏差RBF神经网络预测模型.选择焊缝偏差特征量作为训练样本并对预测模型进行训练,建立焊缝偏差预测模型.结果表明,该模型能够对大功率光纤激光焊接过程中的激光束与焊缝位置之间的偏差进行有效预测. | 高向东 莫玲 游德勇 Katayama Seiji | 2012 | 焊接学报2012，33，4： | 8 |
| 8 | Interpretation of Laser Weld Penetration and Welding Phenomena (Invited Paper)显示文摘Deeply penetrated welds can be produced with high-power-density lasers.Thus the factors affecting laser weld penetration,laser-induced plume behavior and the interaction between a laser beam and a plume,keyhole behavior,melt flows in the molten pool,and the generation and prevention of bubbles and porosity were investigated.Consequently,the effects of plasma and plume on the weld penetration were interpreted in CO2 and fiber lasers welding,respectively.The formation of spattering,underfilled beads,and humping was understood.It was confirmed that porosity was easily formed at high powers and low welding speeds due to the generation of many bubbles from the tip of a keyhole. | Seiji Katayama Yousuke Kawahito | 2009 | 中国激光2009，36，12： | 8 |
| 9 | 激光深熔焊熔池X光图像恢复与特征分析显示文摘X光对于焊件具有很强的穿透性,可以利用其观测和分析激光深熔焊过程焊件内部熔池形态以及匙孔能量传递效果,实现对焊接过程有效地实时监测.在大功率光纤激光焊接304不锈钢过程中,由于X光图像采集过程中的噪声干扰,导致熔池X光图像存在严重退化现象,清晰度不高,识别性较差.为此研究一种图像恢复和增强算法,对熔池X光退化图像进行恢复和增强处理,使其在处理后能够更好地被识别.以盲去卷积法试验估计出熔池X光图像退化的点扩散函数,并以此函数为参数对熔池X光图像进行维纳滤波恢复,再进行灰度变换以增强图像,进而对熔池动态特性进行分析.结果表明,所提出的方法能够有效改善激光焊过程熔池X光图像质量,突出熔池边缘轮廓特征. | 高向东 向俊斌 Khalid M.Hafez Katayama Seiji | 2013 | 焊接学报2013，34，2： | 7 |
| 10 | 金属蒸汽和飞溅图像特征分类的大功率盘形激光焊稳定性分析(英文)显示文摘采用对金属蒸汽图像特征进行分类的方法来评估焊接过程的稳定性。使用高速摄像机实时获取大功率盘形激光焊接过程中金属蒸汽和飞溅图像,定义并提取飞溅面积和个数、飞溅灰度图像平均灰度和熵、金属蒸汽质心与焊接点的坐标比以及金属蒸汽质心的极坐标(矢径和极角)等7个金属蒸汽和飞溅特征。为实现降维,使用Karhunen-Loeve变换法将7维特征向量转换为3维特征向量,同时使用K近邻法将图像分成焊接质量较好与较差两类。实验结果表明,金属蒸汽及飞溅与焊接稳定性有密切的联系,使用K近邻法对Karhunen-Loeve变换后的图像进行分类可以获得较好的效果,实现焊接状况的评估。 | 高向东 文茜 Seiji KATAYAMA | 2013 | Transactions of Nonferrous Metals Society of China2013，23，12： | 6 |
| 11 | 色噪声下卡尔曼滤波焊缝跟踪算法与试验研究显示文摘精确控制激光束使其始终对中并跟踪焊缝是保证激光焊接质量的前提.以大功率光纤激光焊接Type304不锈钢为试验对象,研究一种有色噪声环境下应用卡尔曼滤波最优状态估计预测激光束与焊缝路径偏差的方法.使用高速红外视觉传感器摄取焊接区红外热像,提取焊缝位置参数并构成状态向量,建立基于焊缝位置参数的系统状态方程和焊缝位置测量方程.针对系统动态噪声为有色噪声,通过扩展状态变量的方法建立有色噪声环境下的卡尔曼滤波算法,对焊缝位置进行最优状态估计并得到最小均方差条件下的焊缝偏差最优预测值,消除系统噪声对焊缝偏差测量的影响.焊接试验结果表明新方法可有效抑制有色噪声干扰并提高焊缝跟踪精度. | 高向东 仲训杲 游德勇 KATAYAMA Seiji | 2011 | 控制理论与应用2011，28，7： | 5 |
| 12 | Online Monitoring of Welding Status Based on a DBN Model During Laser Welding显示文摘In this research,an auxiliary illumination visual sensor system,an ultraviolet/visible(UVV)band visual sensor system(with a wavelength less than 780 nm),a spectrometer,and a photodiode are employed to capture insights into the high-power disc laser welding process.The features of the visible optical light signal and the reflected laser light signal are extracted by decomposing the original signal captured by the photodiode via the wavelet packet decomposition(WPD)method.The captured signals of the spectrometer mainly have a wavelength of 400-900 nm,and are divided into 25 sub-bands to extract the spectrum features by statistical methods.The features of the plume and spatters are acquired by images captured by the UVV visual sensor system,and the features of the keyhole are extracted from images captured by the auxiliary illumination visual sensor system.Based on these real-time quantized features of the welding process,a deep belief network(DBN)is established to monitor the welding status.A genetic algorithm is applied to optimize the parameters of the proposed DBN model.The established DBN model shows higher accuracy and robustness in monitoring welding status in comparison with a traditional back-propagation neural network(BPNN)model.The effectiveness and generalization ability of the proposed DBN are validated by three additional experiments with different welding parameters. | Yanxi Zhang Deyong You Xiangdong Gao Seiji Katayama | 2019 | Engineering2019，5，4： | 5 |
| 13 | 醌类图谱分析在环境微生物生态测定中的应用显示文摘近年来 ,随着人们对各种非培养微生物测定法的重视 ,醌类图谱分析作为微生物群体指标已在各种环境中得到了应用 .首先是样品的分析测定技术得到了提高 ,如用硅胶柱代替薄层色谱 .醌类图谱分析的特点是能够同时对应微生物生态评价的 3个重要指标 ,即微生物群体结构、生物量及微生物多样性 .在结合统计分析的基础上 ,在土壤、污泥及堆肥等不同环境样品及不同微生物反应过程中 ,已通过醌类图谱分析对这 3个指标在微生物生态系中的变动进行了成功的评价 .另外 ,对C 1 4同位素标记醌类图谱分析法及醌类图谱分析法在污染物降解中的应用等最新进展也进行了简介 .图 4表 3参 4 | 唐景春 KATAYAMA Arata | 2004 | 应用与环境生物学报2004，10，4： | 5 |
| 14 | Searching for a treatment for Alport syndrome using mouse models显示文摘Alport syndrome(AS) is a hereditary nephritis caused by mutations in COL4A3,COL4A4 or COL4A5 encoding the type IV collagen α3,α4,and α5 chains,which are major components of the glomerular basement membrane.About 20 years have passed since COL4A3,COL4A4,and COL4A5 were identified and the first Alport mouse model was developed using a knockout approach.The phenotype of Alport mice is similar to that of Alport patients,including characteristic thickening and splitting of the glomerular basement membrane.Alport mice have been widely used to study the pathogenesis of AS and to develop effective therapies.In this review,the newer therapies for AS,such as pharmacological interventions,genetic approaches and stem cell therapies,are discussed.Although some stem cel therapies have been demonstrated to slow the rena disease progression in Alport mice,these therapies demand continual refinement as research advances.In terms of the pharmacological drugs,angiotensin-converting enzyme inhibitors have been shown to be effective in Alport mice.Novel therapies that can provide a better outcome or lead to a cure are still awaited. | Kan Katayama Shinsuke Nomura Karl Tryggvason Masaaki Ito | 2014 | World Journal of Nephrology2014，3，4： | 5 |
| 15 | 盘型激光焊金属蒸汽特征色调-色饱和度-亮度分析法研究显示文摘对于大功率盘型激光焊,金属焊件表面在激光束辐射下强烈汽化并形成等离子体状的金属蒸汽羽状物.该金属蒸汽羽状物可逆向激光束传输,对激光有明显的屏蔽作用,降低激光辐射至焊件的能量密度,影响焊接效率和质量.因此研究金属蒸汽特征变化规律及其与焊接质量之间的关联,可实现由金属蒸汽特征实时监测激光焊接状态.以10 kW大功率盘型连续激光焊接304不锈钢钢板为试验对象,应用高速摄像机摄取金属蒸汽动态图像,将其转换至色调-色饱和度-亮度空间,提取金属蒸汽面积、激光束受影响路径长度等相关特征量,以焊缝熔宽的变化作为衡量焊接状态稳定性的参数.通过金属蒸汽特征值的均值统计和方差分析,试验证明根据金属蒸汽面积和激光束受影响路径长度等金属蒸汽特征可有效地反映熔宽质量,从而对焊接状况做出动态评估. | 高向东 汪润林 龙观富 Katayama Seiji | 2012 | 物理学报2012，61，14： | 5 |
| 16 | Influence of Setting Condition on Characteristics of Savonius Hydraulic Turbine with a Shield Plate显示文摘The aim of this investigation was to improve power performance of Savonius hydraulic turbine utilizing small stream for electric generation.An attempt was made to increase the power coefficient of runner by the use of flat shield plate placed upstream of the runner.The difference of the power coefficient is discussed in relation to clearance between the runner and the bottom wall and the rotation direction of the runner.The flow field around the runner was also examined visually to clarify influences of setting conditions on the power performance.From this study it was found that the power coefficient is achieved for 0.47 by only using a flat shield plate,the increase is up to 80% over the runner without the plate.Moreover,it is the proper condition that clearance ratio is 0.73 in this study. | Shouichiro Iio Yusuke Katayama Fuminori Uchiyama Eiichi Sato Toshihiko Ikeda | 2011 | Journal of Thermal Science2011，20，3： | 5 |
| 17 | 大功率盘形激光焊接过程等离子体图像特征分析显示文摘研究一种基于等离子体图像特征的大功率盘形激光深熔焊质量分析及检测的新方法.以大功率盘形激光焊接Type 304不锈钢板为试验对象,应用高速摄像机摄取焊接过程中的等离子体图像,通过图像处理技术提取等离子体的面积和高度特征.以熔宽作为衡量焊接过程稳定性的因素,对比焊接过程中等离子体图像和焊接试件的熔宽变化,研究相邻等离子体图像的面积变化值和高度变化值在不同焊接质量区域中的平均值和基于不同阈值下所占的百分比,探索判定焊接过程质量稳定性的特征参量的统计规律.结果表明,所提出的方法能够对大功率盘形激光焊接Type 304不锈钢板焊接质量做出动态评估. | 高向东 吕威兴 游德勇 Katayama Seiji | 2011 | 焊接学报2011，32，12： | 4 |
| 18 | Shear wave elastography in hepatitis C patients before and after antiviral therapy显示文摘AIM To investigate shear wave(SW) propagation velocity in patients with untreated hepatitis C and patients with sustained virological response(SVR). METHODS A total of 136 hepatitis C patients [85 patients who had not received antiviral therapy(na?ve group) and 51 patients who had received antiviral therapy and subsequently achieved SVR of at least 24 wk(SVR group)] and 58 healthy volunteers and outpatients without liver disease(control group) underwent evaluation of liver stiffness by SW elastography(SWE). Various parameters were evaluated in the chronic hepatitis C patients at the time of SWE.RESULTS SW propagation velocity(Vs) was 1.23 ± 0.14 m/s in the control group, 1.56 ± 0.32 m/s in the SVR group, and 1.69 ± 0.31 m/s in the na?ve group. Significant differences were seen between the control group and the SVR group(P = 0.0000) and between the SVR group and the na?ve group(P = 0.01417). All four fibrosis markers were higher in the na?ve group than in the SVR group. In the na?ve group, Vs was positively correlated with alanine aminotransferase(ALT)(r = 0.5372), α feto protein(AFP)(r = 0.4389), type Ⅳ collagen(r = 0.5883), procollagen Ⅲ peptide(P-Ⅲ-P)(r = 0.4140), hyaluronic acid(r = 0.4551), and Mac-2 binding protein glycosylation isomer(M2BPGi)(r = 0.6092) and negatively correlated with albumin(r =-0.4289), platelets(r =-0.5372), and prothrombinactivity(r =-0.5235). On multiple regression analysis, Vs was the most strongly correlated with ALT(standard partial regression std β = 0.4039, P = 0.00000). In the SVR group, Vs was positively correlated with AFP(r = 0.6977), type IV collagen(r = 0.5228), P-Ⅲ-P(r = 0.5812), hyaluronic acid(r = 0.5189), and M2BPGi(r = 0.6251) and negatively correlated with albumin(r =-0.4283), platelets(r =-0.4842), and prothrombin activity(r =-0.4771). On multiple regression analysis, Vs was strongly correlated with AFP(standard partial regression std β = 0.5953, P = 0.00000) and M2BPGi(standard partial regression std β = 0.2969, P = 0.03363).CONCLUSION In hepatitis C patients, liver stiffness is higher in treatment-na?ve patients than in those showing SVR. SWE may be a predictor of hepatocarcinogenesis in SVR patients. | Toshikuni Suda Osamu Okawa Rion Masaoka Yoshinori Gyotoku Naohiko Tokutomi Yasumi Katayama Masaya Tamano | 2017 | World Journal of Hepatology2017，9，1： | 4 |
| 19 | Dual therapy for third-line Helicobacter pylori eradication and urea breath test prediction显示文摘We evaluated the efficacy and tolerability of a dual therapy with rabeprazole and amoxicillin (AMX) as an empiric third-line rescue therapy. In patients with failure of first-line treatment with a proton pump inhibitor (PPI)- AMX-clarithromycin regimen and second-line treatment with the PPI-AMX-metronidazole regimen, a third-line eradication regimen with rabeprazole (10 mg q.i.d.) and AMX (500 mg q.i.d.) was prescribed for 2 wk. Eradication was confirmed by the results of the 13C-urea breath test (UBT) at 12 wk after the therapy. A total of 46 patients were included; however, two were lost to followup. The eradication rates as determined by per-protocol and intention-to-treat analyses were 65.9% and 63.0%,respectively. The pretreatment UBT results in the subjects showing eradication failure; those patients showing successful eradication comprised 32.9 ± 28.8 permil and 14.8 ± 12.8 permil, respectively. The pretreatment UBT results in the subjects with eradication failure were significantly higher than those in the patients with successful eradication (P = 0.019). A low pretreatment UBT result (≤ 28.5 permil) predicted the success of the eradication therapy with a positive predictive value of 81.3% and a sensitivity of 89.7%. Adverse effects were reported in 18.2% of the patients, mainly diarrhea and stomatitis. Dual therapy with rabeprazole and AMX appears to serve as a potential empirical third-line strategy for patients with low values on pretreatment UBT. | Toshihiro Nishizawa Hidekazu Suzuki Takama Maekawa Naohiko Harada Tatsuya Toyokawa Toshio Kuwai Masanori Ohara Takahiro Suzuki Masahiro Kawanishi Kenji Noguchi Toshiyuki Yoshio Shinji Katsushima Hideo Tsuruta Eiji Masuda Munehiro Tanaka Shunsuke Katayama Norio Kawamura Yuko Nishizawa Toshifumi Hibi Masahiko Takahashi | 2012 | World Journal of Gastroenterology2012，18，21： | 4 |
| 20 | The mechanism of penetration increase in A-TIG welding显示文摘增加焊接穿入的 A-TIG 的机制被使用我们为不锈钢开发了的激活的流动学习。流动和焊接水池的温度领域上的流动的效果被 PHOENICS 软件模仿。它证明没有流动,液体流动将沿着焊接水池然后在下面的表面是外面的,导致 flatter 焊接水池形状。与流动,氧,从否定价值把表面紧张毕业生的温度依赖改变到积极价值,能在焊接穿入上引起重要变化。液体流动将沿着向中心然后在下面的焊接水池的表面是里面的。这个液体流动模式高效地把热转移到焊接根并且生产相对深、狭窄的焊接。这个变化是穿入增加的主要原因。而且,弧建设能引起焊接宽度变得更狭窄并且变得更深的穿入,但是这不是穿入增加的主要原因。焊接水池表面和弧侧面的液体流动上的流动的效果在焊接的常规 TIG 并且在由使用高速度的摄像机焊接的 A-TIG 被观察。液体流动行为被微集中的 X 光检查传播录像观察系统在实时规模设想。结果显示与更狭窄的宽度和更深的穿入导致焊接祷告的更强壮的里面的液体流动模式能显然在焊接的 A-TIG 的情况中被识别。流动能在焊接水池改变液体流动的方向。它与模拟结果有一个好协议。 | Rui-Hua ZHANG Ji-Luan PAN Seiji KATAYAMA | 2011 | Frontiers of Materials Science2011，5，2： | 4 |
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