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基于最小二乘支持向量机预测器的传感器故障检测与数据恢复(英文)

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仪器仪表学报 2007年第2期28卷 193-197页

作者：冯志刚信太克规王祈哈尔滨工业大学自动化测试与控制系日本佐贺大学理工学部

本文介绍了最小二乘支持向量机(LS-SVM)回归的基本原理,提出了一种基于LS-SVM回归的时间序列预测器,并将其用于传感器的故障检测和数据恢复。论述了LS-SVM预测器的实现方法和步骤,并且将其应用于压力传感器的故障检测和数据恢复,同线性... 详细信息

本文介绍了最小二乘支持向量机(LS-SVM)回归的基本原理,提出了一种基于LS-SVM回归的时间序列预测器,并将其用于传感器的故障检测和数据恢复。论述了LS-SVM预测器的实现方法和步骤,并且将其应用于压力传感器的故障检测和数据恢复,同线性神经网络预测器、RBF神经网络预测器和BP神经网络预测器的比较结果表明,LS-SVM预测器具有更高的预测精度,更好的外推能力,计算效率最高,因此,LS-SVM预测器是传感器故障检测和短期数据恢复的一种有效方法。

关键词：数据恢复神经网络预测器传感器故障检测最小二乘支持向量机

气干与湿润状态下多孔隙岩石的黏弹性特性与力学模型

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岩石力学与工程学报 2007年第7期26卷 1325-1332页

作者：高秀君大久保诚介福井胜则东京大学工学系研究科

为研究多孔隙岩石的变形特性,提出一个适用于多孔隙岩石的非线形流变模型(本构方程)。本模型是由弹簧与阻尼器串连组成,弹簧部分采用作者曾经提出的本构方程;代表黏性部分的阻尼器设定加载前黏度很小,随着荷载的增加而逐渐加大。在低应... 详细信息

为研究多孔隙岩石的变形特性,提出一个适用于多孔隙岩石的非线形流变模型(本构方程)。本模型是由弹簧与阻尼器串连组成,弹簧部分采用作者曾经提出的本构方程;代表黏性部分的阻尼器设定加载前黏度很小,随着荷载的增加而逐渐加大。在低应力水平下的蠕变试验中,由于弹性系数没有明显的下降,因而设定阻尼器的应变与蠕变应变相同。为验证模型的准确性,对泥质砂岩、大谷凝灰岩、田下凝灰岩与河津凝灰岩4类岩石分别进行理论计算与试验测试。对于各类岩石,计算得到的应力–应变曲线与实测曲线基本一致,而且用此流变模型,发现气干与湿润状态下杨氏模量具有明显的差异。研究结果表明,在这2种状态下,杨氏模量的差异是由于非弹性应变(即阻尼器的应变)不同而引起的。在湿润状态下,阻尼器的应变增加越大,杨氏模量则变得越小。即使在较低的应力条件下,阻尼器的应变比以往研究中所认为的应变要大很多。

关键词：岩石力学多孔隙岩石凝灰岩泥质砂岩蠕变非弹性应变柔量本构方程

Recent evidence for subcutaneous drains to prevent surgical site infections after abdominal surgery:A systematic review and metaanalysis

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World Journal of Gastrointestinal Surgery 2023年第12期15卷 2879-2889页

作者： Tomohiro Ishinuki Hiroji Shinkawa Keita Kouzu Seiichi Shinji Erika Goda Toshio Ohyanagi Masahiro Kobayashi Motomu Kobayashi katsunori Suzuki Yuichi Kitagawa Chizuru Yamashita Yasuhiko Mohri Junzo Shimizu Motoi Uchino Seiji Haji Masahiro Yoshida Hiroki Ohge Toshihiko Mayumi Toru Mizuguchi Department of Nursing Surgical SciencesSapporo Medical UniversitySapporo 060-8556HokkaidoJapan Department of Hepatobiliary-Pancreatic Surgery Osaka Metropolitan University Graduate School of MedicineAbeno-Ku 545-0051Japan Department of Surgery National Defense Medical CollegeTokorozawa 359-8513Japan Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery Nippon Medical SchoolTokyo 113-8602Japan Department of Nursing Japan Health Care UniversitySapporo 062-0053Japan Department of Liberal Arts and Sciences Center for Medical EducationSapporo Medical UniversitySapporo 060-8556Japan Department of Clinical Pharmacokinetics Research and Education Center for Clinical PharmacyKitasato UniversityTokyo 108-8641Japan Department of Anesthesiology Hokushinkai Megumino HospitalEniwa 061-1395Japan Department of Infectious Disease Medicine School of MedicineUniversity of Occupational and Environmental HealthKitakyushu 807-8555Japan Department of Gastrointestinal Surgery National Center for Geriatrics and GerontologyObu 474-8511Japan Department of Anesthesiology and Critical Care Medicine Fujita Health UniversityToyoake 470-1192Japan Department of Gastrointestinal Surgery Mie Prefectural General Medical CenterYokkaich 510-8561Japan Department of Surgery Toyonaka Municipal HospitalToyonaka 560-8565Japan Department of Gastroenterological Surgery Hyogo Medical UniversityNishinomiya 663-8501Japan Department of Surgery Soseikai General HospitalKyoto 612-8473Japan Department of Hepato-Biliary-Pancreatic&Gastrointestinal Surgery International University of Health and WelfareIchikawa 272-0827Japan Department of Infectious Disease Hiroshima University HospitalHiroshima 734-8551Japan Department of Intensive Care Unit Chukyo HospitalJapan Community Health Care OrganizationNagoya 457-8510Japan

BACKGROUND Surgical site infections(SSIs)increase mortality,hospital stays,additional medical treatment,and medical *** drains prevent SSIs in gynecological and breast surgeries;however,their clinical impact in abdominal surgery remains *** To investigate whether subcutaneous drains were beneficial in abdominal surgery using a systematic review and *** The database search used PubMed,MEDLINE,and the Cochrane *** following inclusion criteria were set for the systematic review:(1)Randomized controlled trial studies comparing SSIs after abdominal surgery with or without subcutaneous drains;and(2)Studies that described clinical outcomes,such as SSIs,seroma formation,the length of hospital stays,and *** Eight studies were included in this *** rate of total SSIs was significantly lower in the drained group(54/771,7.0%)than in the control group(89/759,11.7%),particularly in gastrointestinal ***,the rate of superficial SSIs was slightly lower in the drained group(31/517,6.0%)than in the control group(49/521,9.4%).No significant differences were observed in seroma formation between the *** stays were shorter in the drained group than in the control *** Subcutaneous drains after abdominal surgery prevented SSIs and reduced hospital stays but did not significantly affect seroma *** timing of drain removal needs to be reconsidered in future studies.

关键词： Abdominal surgery Mortality Seroma formation Subcutaneous drain Surgical site infections

Morbidity of Open Saphenous Vein Harvesting after Preoperative Ultrasonic Mapping

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Open Journal of Thoracic Surgery 2015年第1期5卷 4-9页

作者： Susumu Isoda Tamizo Kimura katsunori Tanaka Kenji Nishimura Nozomu Yamanaka Shin-ichi Taguchi Keiji Uchida Norihisa Karube Kiyotaka Imoto Department of Cardiovascular Surgery Yokohama City University Medical Center Yokohama Japan Department of Cardiovascular Surgery National Defense Medical College Tokorozawa Japan

Preoperative echography of a saphenous vein graft (SVG) was studied. In 58 cases of consecutive coronary artery bypass grafting, 31 patients underwent SVG echography. Preoperative assessment revealed vein caliber, branching, or varicose saphenous veins. The location of the saphenous vein was marked. Saphenous veins were harvested by the open harvest technique, and the caliber of the veins and the availability of the anastomosis device were recorded. Postoperative morbidity was recorded. Preoperative findings revealed that four (6.5%) of 62 femoral saphenous veins were estimated as “not graftable” because of being a varicose vein or having a small caliber. Seven of 32 lower saphenous veins were estimated as “not graftable”. The mean discrepancy of the caliber was 0.6 mm undersized with preoperative estimation. During harvesting, one of 31 patients had a wrong marking. We were able to use all harvested veins. The morbidity of saphenous harvesting was observed in two (6.5%) of 31 patients. One patient whose marking was wrong had minor skin necrosis. Another patient experienced a hematoma because of the excess effect of warfarin. Preoperative ultrasonic mapping of the saphenous vein reduced useless harvesting, provided information concerning anastomosis device availability, and seemed to reduce morbidity because dissection can be minimal.

关键词： Saphenous Vein Ultrasonic Mapping Coronary Artery Bypass Grafting

Liver metastases from pancreatic ductal adenocarcinoma:is there a place for surgery in the modern era?

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Journal of Pancreatology 2020年第2期3卷 81-85页

作者： Imai katsunori Margonis Georgios A. Wang Jaeyun Wolfgang Christopher L. Baba Hideo Weiss Matthew J. Department of Gastroenterological Surgery Graduate School of Life SciencesKumamoto UniversityKumamotoJapan Department of Surgery Johns Hopkins University School of MedicineBaltimoreMDNYUSA Northwell Health Cancer Institute Lake SuccessNYUSA

Pancreatic ductal adenocarcinoma(PDAC)represents one of the most aggressive malignancies,and the majority of patients with PDAC present with metastatic disease,mainly in the liver,at the time of *** resection is the only treatment that can offer prolonged survival and possible ***,the indications for surgery for patients with PDAC metastases remain extremely limited to highly selected patients with localized disease,and metastatic disease is generally regarded as a contraindication to ***,however,the advent of more effective chemotherapy has changed the treatment strategy for metastatic *** fact,cases in which resection of synchronous or metachronous PDAC liver metastases lead to prolonged survival in highly selected patients have been *** this review,we provide current data regarding survival outcomes after surgery,and discuss the role of surgical resection and selection criteria for patients with PDAC liver metastases in the modern era.

关键词： Liver metastases Pancreatic cancer Surgery

Gamma-gamma大气湍流下自由空间光通信的性能

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红外与激光工程 2011年第7期40卷 1318-1322页

作者：韩立强王祁信太克归哈尔滨工业大学自动化测试与控制系黑龙江哈尔滨150001 燕山大学电气工程学院河北秦皇岛055004

自由空间光通信在各种应用中得到了广泛关注,但大气湍流效应导致系统链路性能恶化。假设大气湍流信道是无记忆平稳遍历并且为加性高斯白噪声(AWGN),自由空间光通信系统采用开关键控(OOK)强度调制直接检测(ID/DD),研究了gamma-gamma大气... 详细信息

自由空间光通信在各种应用中得到了广泛关注,但大气湍流效应导致系统链路性能恶化。假设大气湍流信道是无记忆平稳遍历并且为加性高斯白噪声(AWGN),自由空间光通信系统采用开关键控(OOK)强度调制直接检测(ID/DD),研究了gamma-gamma大气湍流信道下自由空间光通信的性能。利用Meijer G函数推导出了自由空间光通信的性能指标平均误码率的闭合表达式,简化了中断概率和平均信道容量的闭合表达式。在不同大气湍流强度下,根据平均误码率、中断概率、平均容量的闭合表达式分别给出了几个数值仿真实例,分析了大气折射率结构常数、传输距离、信噪比与自由空间光通信系统性能的关系。

关键词：自由空间光通信误码率中断概率平均容量 gamma-gamma分布

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大气湍流下自由空间光通信中断概率分析

红外与激光工程 2010年第4期39卷 660-663页

作者：韩立强王祁信太克归哈尔滨工业大学自动化测试与控制系黑龙江哈尔滨150001 燕山大学电气工程学院河北秦皇岛066004

自由空间光通信在未来全球通信网中具有潜在的应用价值,然而,自由空间光通信易受大气湍流影响,致使系统性能严重下降。根据大气湍流实际情况,把大气信道分为弱湍流下的对数正态分布模型和中强湍流下gamma-gamma分布模型。研究了自由空... 详细信息

自由空间光通信在未来全球通信网中具有潜在的应用价值,然而,自由空间光通信易受大气湍流影响,致使系统性能严重下降。根据大气湍流实际情况,把大气信道分为弱湍流下的对数正态分布模型和中强湍流下gamma-gamma分布模型。研究了自由空间光通信中一个重要的性能指标—中断概率,基于信道模型利用Merjer G函数简化了该概率公式。研究了大气湍流和其他参数(如传输距离、波长)对中断概率的影响,并从弱湍流到强湍流仿真了湍流对通信中断概率的影响。数值模拟表明:随着大气湍流强度以及门限值的增大,自由光通信系统的中断概率相应增大。为设计自由空间光通信系统提供了参考。

关键词：自由空间光通信中断概率大气湍流闪烁指数

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低蛋白日粮条件下选育对鹌鹑生产性能的影响

中国农业大学学报 2009年第4期14卷 84-90页

作者：李永洙佐藤胜纪临沂师范学院农林学院山东临沂276005 冈山大学农学院

旨在研究培育低蛋白质日粮中发挥高产蛋性能的日本鹌鹑新品系。试验选用6～20周龄日本鹌鹑N、B（Normal、Brown）2个品系和杂种群（BN）,共进行8个世代的选育试验,各品系采用单因子试验设计,在低蛋白CP为18%日粮条件下分选育组、非选育... 详细信息

旨在研究培育低蛋白质日粮中发挥高产蛋性能的日本鹌鹑新品系。试验选用6～20周龄日本鹌鹑N、B（Normal、Brown）2个品系和杂种群（BN）,共进行8个世代的选育试验,各品系采用单因子试验设计,在低蛋白CP为18%日粮条件下分选育组、非选育组以及对照组（CP24%）,N、B基础群中选留15种家系,以产蛋率为主选性状,以繁殖性状为辅选性状作为选育指标进行试验。结果表明：随着世代数的增加选育组和对照组的适应力均有显著上升（P〈0.05）,N品系的各世代遗传改进量为0.26;另外,世代间产蛋率有增高的倾向,选育组平均累积产蛋率与非选育组较显著升高（P〈0.05）,特别是选育组各世代遗传改良极为显著（P〈0.01）。通过选育N、B新品系,能够改善产蛋性能,在BN杂种群中效果更明显。

关键词：选育世代数低蛋白日粮产蛋率适应力鹌鹑

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低排泄氮量的鹌鹑改良选育

畜牧兽医学报 2008年第12期39卷 1785-1793页

作者：李永洙佐藤胜纪临沂师范学院农林学院冈山大学农学院

选用日本鹌鹑N、B(Normal、Brown)品系和杂种群(BN),共进行8个世代(6~20周龄)的选育试验,各品系采用单因子试验设计,在CP 18%日粮条件下分选育组、非选育组以及对照组(CP 24%),N、B基础群中选留15种家系,以采食量为主选性状,以产蛋率和... 详细信息

选用日本鹌鹑N、B(Normal、Brown)品系和杂种群(BN),共进行8个世代(6~20周龄)的选育试验,各品系采用单因子试验设计,在CP 18%日粮条件下分选育组、非选育组以及对照组(CP 24%),N、B基础群中选留15种家系,以采食量为主选性状,以产蛋率和排泄氮量为辅选性状作为选育指标进行试验。结果表明:随着世代数的增加选育组和对照组的适应力均有显著升高(P<0.05),N品系的各世代遗传改进量为0.26;另外,世代间产蛋率有增高的倾向,选育组平均累积产蛋率与非选育组较显著升高(P<0.05),特别是选育组各世代遗传改良极为显著(P<0.01)。各世代间采食量无显著差异,同世代各品系间选育组N、B采食量均高于非选育组,但显著低于对照组(P<0.05)。选育组排泄氮量和血清中尿酸含量在改良2世代后明显低于非选育组和对照组(P<0.05),排泄氮量分别降低7%~15%。综上所述,通过选育N、B新品系,能够改善产蛋性能,且显著降低排泄氮量,在BN杂种群中效果更明显。

关键词：选育世代数产蛋率排泄氮量鹌鹑