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Effect of Changes in Sea-Surface State on Statistical Characteristics of Sea Clutter with X-Band Radar

Wireless Engineering and Technology 2011年第3期2卷 175-183页

作者： Seishiro Ishii Syuji Sayama koichi mizutani Department of Communications Engineering National Defense Academy Yokosuka Japan Department of Intelligent Interaction Technology University of Tsukuba Tsukuba Japan

We have made observations of X-band radar sea clutter from the sea surface and sea-surface state in the Uraga Suido Traffic Route, which is used by ships entering and leaving Tokyo Bay, and the nearby Daini Kaiho Sea Fortress. We estimated the distributions of reflected amplitudes due to sea clutter using models that assume Weibull, Log-Weibull, Log-normal, and K-distributions. We then compared the results of estimating these distributions with sea-surface state data to investigate the effects of changes in the sea-surface state on the statistical characteristics of sea clutter. As a result, we showed that observed sub-ranges not containing a target conformed better to the Weibull distribution regardless of Significant Wave Height (SWH). Further, sub-ranges conforming to the Log-Weibull or Log-normal distribution in areas contained a target when the SWH was large, and as SWH decreases, sub-ranges conforming to a Log-normal. We also showed that for observed sub-ranges not containing a target, the shape parameter, c, of both Weibull and Log-Weibull distribution correlated with SWH. The correlation between wave period and shape parameters of Weibull and Log-Weibull distribution showed a weak correlation.

关键词： X-Band Radar Sea Clutter Significant Wave Height Weibull Distribution Log-Normal Distribution

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采用三个叉指换能器的兰姆波频率调制器

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压电与声光 1985年第6期 51-54页

作者： Kohji Toda,koichi mizutani,郑文胜日·防卫大学电气工学科日·防卫大学电气工学科

本文证实了一种使用兰姆(Lamb)波压控振荡器的频率调制器.该兰姆波器件采用三个叉指换能器,须经过作为压控电阻器的FET(场效应晶体管)馈送调制信号给器件中部的换能器,其余的两个换能器与一个放大器组成延迟线振荡器.振荡频率依加于FET... 详细信息

本文证实了一种使用兰姆(Lamb)波压控振荡器的频率调制器.该兰姆波器件采用三个叉指换能器,须经过作为压控电阻器的FET(场效应晶体管)馈送调制信号给器件中部的换能器,其余的两个换能器与一个放大器组成延迟线振荡器.振荡频率依加于FET上的电压线性地变化.叙述了该器件的设计和基本特性.

关键词：压控振荡器频率调制器延迟线调频器馈电设备兰姆波换能器测深仪

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Serum Mac-2 binding protein is a novel biomarker for chronic pancreatitis

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World Journal of Gastroenterology 2016年第17期22卷 4403-4410页

作者： Tomohiro Maekawa Yoshihiro Kamada Yusuke Ebisutani Makiko Ueda Tomoki Hata koichi Kawamoto Shinji Takamatsu Kayo mizutani Mayuka Shimomura Tomoaki Sobajima Hironobu Fujii Kotarosumitomo Nakayama Kimihiro Nishino Makoto Yamada Takashi Kumada Toshifumi Ito Hidetoshi Eguchi Hiroaki Nagano Eiji Miyoshi Department of Molecular Biochemistry and Clinical Investigation Osaka University Graduate School of Medicine Suita Osaka 565-0871 Japan Department of Surgery Osaka University Graduate School of Medicine Suita Suita Osaka 565-0871 Japan aMs New Otani Clinic Osaka Osaka 540-8570 Japan Department of Gastroenterology Ogaki Municipal Hospital Ogaki Gifu 503-8502 Japan Department of Gastroenterology and Hepatology Japan Community Health Care Organization Osaka Hospital Osaka Osaka 540-8570 Japan Department of Surgery Yamaguchi University Graduate School of Medicine Ube Yamaguchi 755-8505 Japan

AIM: To determine the efficacy of Mac-2 binding protein (Mac-2bp) for diagnosis of chronic ***: Fifty-nine healthy volunteers (HV), 162 patients with chronic pancreatitis (CP), and 94 patients with pancreatic ductal adenocarcinoma (PDAC) were enrolled in this study. We measured serum Mac-2bp using our developed enzyme-linked immunosorbent assay kit. Additional biochemical variables were measured using an automated analyzer (including aminotransferase, alanine aminotransferase, γ-glutamyltransferase, alkaline phosphatase, triglyceride, C-reactive protein, and amylase levels) or chemiluminescent enzyme immunoassay (carbohydrate antigen 19-9 and carcinoembryonic antigen). The ability of Mac-2bp to predict CP diagnosis accurately was assessed using receiver operating characteristic (ROC) ***: Serum Mac-2bp levels were significantly increased in CP patients compared to HV (P < 0.0001) and PDAC patients (P < 0.0001). Area under the ROC curve values of Mac-2bp for the discrimination of CP from HV and PDAC were 0.727 and 0.784, respectively. Multivariate analyses demonstrated that serum Mac-2bp levels were independent determinants for CP diagnosis from HV and PDAC patients. Immunohistological staining showed that Mac-2bp was expressed faintly in the pancreas tissues of both CP and PDAC patients. Serum aspartate aminotransferase, alanine aminotransferase, γ-glutamyltransferase, alkaline phosphatase, and triglyceride levels were significantly higher in patients with CP or PDAC. Serum Mac-2bp levels were highly correlated with protein levels of alanine aminotransferase, γ-glutamyltransferase, and C-reactive protein, but not amylase, suggesting that the damaged liver produces ***: Measurement of serum Mac-2bp may be a novel and useful biomarker for CP diagnosis as well as liver fibrosis in the general population.

关键词： Pancreatic ductal adenocarcinoma Chronic pancreatitis Biomarker Steatopancreatitis Mac-2 binding protein (LGALS3BP)

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