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Verified Computation of Eigenpairs in the Generalized Eigenvalue Problem for Nonsquare Matrix Pencils

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Journal of Mathematical Research with Applications 2020年第1期40卷 73-86页

作者： shinya MIYAJIMA Faculty of Science and Engineering Iwate University

Consider an optimization problem arising from the generalized eigenvalue problem Ax = λBx, where A, B ∈ C;and m > n. Ito et al. showed that the optimization problem can be solved by utilizing right singular vectors of C := [B, A]. In this paper, we focus on computing intervals containing the solution. When some singular values of C are multiple or nearly multiple, we can enclose bases of corresponding invariant subspaces of C;C, where C;denotes the conjugate transpose of C, but cannot enclose the corresponding right singular *** purpose of this paper is to prove that the solution can be obtained even when we utilize the bases instead of the right singular vectors. Based on the proved result, we propose an algorithm for computing the intervals. Numerical results show property of the algorithm.

关键词： generalized eigenvalue problem nonsquare pencil invariant subspace verified numerical computation

Influence of comorbidity on outcomes of older patients with acute pancreatitis based on a national administrative database

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Hepatobiliary & Pancreatic Diseases International 2015年第4期14卷 422-428页

作者： Atsuhiko Murata Makoto Ohtani Keiji Muramatsu shinya Matsuda Department of Preventive Medicine and Community Health School of Medicine University of Occupational and Environmental Health

Little information is available on the influ- ence of comorbidities on outcomes of older patients with acute pancreatitis. This study aimed to investigate the influence of co- morbidities on outcomes of older patients with acute pancreati- tis using data from a national Iapanese administrative database. METHODS： A total of 14 322 older patients （〉70 years） with acute pancreatitis were referred to 1090 hospitals between 2010 and 2012 in Japan. We collected patients＇ data from the administrative database to compare the in-hospital mortal- ity and length of stay of older patients with acute pancreatitis. The patients were categorized into four groups according to comorbidity level using the Charlson Comorbidity Index （CCI）： none （CCI score=0; n=6890）; mild （1; n=3874）; moder- ate （2; n=2192） and severe （〉3; n=1366）. RESULTS： Multiple logistic and linear regression analyses revealed that severe comorbidity was significantly associated with higher in-hospital mortality and longer length of stay [odds ratio （OR）=2.26; 95% confidence interval （CI）： 1.75-2.92, P〈0.001 and coefficient 4.37 days; 95% CI： 2.89-5.85, P〈0.001, respectively]. In addition, cardiovascular and renal diseases were the most significant comorbidities affecting outcomes of the older patients. ORs of cardiovascular and renal diseases for mortality were 1.44 （95% CI： 1.13-1.85, P=0.003） and 2.69 （95% CI： 1.88-3.85, P〈0.001）, respectively, and coefficients forlength of stay were 3.01 days （95% CI： 1.34-4.67, P〈0.001） and 3.72 days （95% CI： 1.01-6.42, P=0.007）, respectively. CONCLUSION： This study demonstrated that comorbidities significantly influenced outcomes of older patients with acute pancreatitis and cardiovascular and renal comorbidities were significant factors affecting outcomes.

关键词： acute pancreatitis comorbidity length of stay databases

Reverse current reduction of Ge photodiodes on Si without post-growth annealing

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Chinese Optics Letters 2009年第4期7卷 286-290页

作者： Sungbong Park shinya Takita Yasuhiko Ishikawa Jiro Osaka Kazumi Wada Department of Materials Engineering University of Tokyo

A new approach to reduce the reverse current of Ge pin photodiodes on Si is presented, in which an i-Si layer is inserted between Ge and top Si layers to reduce the electric field in the Ge layer. Without post- growth annealing, the reverse current density is reduced to -10 mA/cm^2 at -1 V, i.e., over one order of magnitude lower than that of the reference photodiode without i-Si layer. However, the responsivity of the photodiodes is not severely compromised. This lowered-reverse-current is explained by band-pinning at the i-Si/i-Ge interface. Barrier lowering mechanism induced by E-field is also discussed. The presented ＂non-thermal＂ approach to reduce reverse current should accelerate electronics-photonics convergence by using Oe on the Si complementary metal oxide semiconductor （CMOS） platform.

关键词： CMOS integrated circuits Electric fields Germanium Metals MOS devices Oxide semiconductors Photodiodes Silicon Silicon on insulator technology

Structural Analysis of Layered Polymer Crystals and Application to Photofunctional Materials Using Organic Intercalation

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复旦学报(自然科学版) 2005年第5期 303-304页

作者： shinya Oshita,Akikazu Matsumoto Department of Applied Chemistry Graduate School of Engineering Osaka City University Sugimoto Sumiyoshi-ku Osaka 558-8585 Japan Department of Applied Chemistry Graduate School of Engineering Osaka City University Sugimoto Sumiyoshi-ku Osaka 558-8585 Japan

Structural Analysis of Layered Polymer Crystals and Application to Photofunctional Materials Using Organic Intercalation

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复旦学报（自然科学版） 2005年第5期44卷 913-914页

作者： shinya Oshita Akikazu Matsumoto Department of Applied Chemistry Graduate School of Engineering Osaka City University Sugimoto Sumiyoshi-ku Osaka 558-8585 JapanDepartment of Applied Chemistry Graduate School of Engineering Osaka City University Sugimoto Sumiyoshi-ku Osaka 558-8585 Japan

We reported that layered polymer crystals are obtained by the topochemical polymerization of 1,3-diene monomers and provided as host material for organic intercalation[1]. For intercalation using various long-alkyl amines as the guest species, its reaction behavior, mechanism, characteristics, and potential to application have been clarified[2]. We also succeeded in the synthesis of several host layered polymer crystals with different tacticities and layer structures[3]. We describe here intercalation using various stereoregular poly(muconic acid)s (PMA) and n-alkylamines as the host and guest compounds, respectively. The reaction behavior and the layered structure of the obtained ammonium polymers are discussed from the viewpoint of stereochemical structure of the host polymers.

关键词：分层聚合物结构分析晶体光化学插层反应

Review of research on agricultural vehicle autonomous guidance

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International Journal of Agricultural and Biological Engineering 2009年第3期2卷 1-16页

作者： Ming Li Kenji Imou Katsuhiro Wakabayashi shinya Yokoyama Graduate School of Agricultural and Life Sciences the University of TokyoJapan

A brief review of research in agricultural vehicle guidance technologies is *** authors propose the conceptual framework of an agricultural vehicle autonomous guidance system,and then analyze its device *** paper introduces navigation sensors,computational methods,navigation planners and steering *** include global positioning systems(GPS),machine vision,dead-reckoning sensors,laser-based sensors,inertial sensors and geomagnetic direction *** methods for sensor information are used to extract features and fuse *** generate movement information to supply control *** transform guidance information into changes in position and direction.A number of prototype guidance systems have been developed but have not yet proceeded to *** and machine vision fused together or one fused with another auxiliary technology is becoming the trend development for agricultural vehicle guidance *** of new popular robotic technologies will augment the realization of agricultural vehicle automation in the future.

关键词： agricultural vehicle guidance machine vision GPS

Local regulator adrenomedullin contributes to the circulatory disturbance in cirrhotic rats

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World Journal of Gastroenterology 2006年第13期12卷 2095-2102页

作者： shinya Sakurai Hideyuki Kojima Masahito Uemura Hiroyasu Satoh Hiroshi Fukui Third Department of Internal Medicine Nara Medical University 840 Shijo-cho Kashihara-shiNara 634-8522Japan Department of Pharmacology Nara Medical University 840 Shijo-cho Kashihara-shiNara 634-8522Japan

AIM： To investigate whether adrenomedullin, a potent vasodilator peptide, plays a role in the circulatory disturbance in cirrhosis. METHODS： Cirrhosis was induced in rats by weekly gavage of carbon tetrachloride. Hemodynamic studies were performed in vivo using radioactive microspheres and in vitro using isolated aortic rings. The adrenomedullin concentrations were measured by radioimmunoassay. RESULTS： Acute administration of adrenomedullin to the control rats reduced the systemic arterial pressure along with an increase of serum levels of the stable metabolite of nitric oxide （NOx）, in a dose-dependent manner. Chronic infusion of adrenomedullin reduced the vascular resistance and increased the blood flow in the systemic and splanchnic circulation. Intravenous administration of anti-adrenomedullin antibody did not affect any hemodynamic parameters in the cirrhotic rats, whereas this antibody ameliorated the blunted contractile response to phenylephrine, o-adrenergic receptor agonist, in the aortic rings of the cirrhotic rats. The adrenomedullin concentrations in the aorta were higher in the cirrhotic rats than in the controls, and correlated with the mean arterial pressure in the cirrhotic rats. Moreover, adrenomedullin blunted the contractile response to phenylephrine in both of the control aorta and cirrhotic aorta, but not in the presence of NG-nitro L-arginine methyl ester, an NO synthase inhibitor. CONCLUSION： Adrenomedullin overproduced in the vascular wall may contribute to the circulatory disturbance in cirrhosis as a local regulator of the vascular tonus rather than a circulating hormone.

关键词： Adrenomedullin Liver cirrhosis Vasodilation Circulatory disturbance Vascular tonus Circulating hormone

Acquiring non-parametric scattering phase function from a single image

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Computational Visual Media 2018年第4期4卷 323-331页

作者： Yuki Minetomo Hiroyuki Kubo Takuya Funatomi Mikio shinya Yasuhiro Mukaigawa Nara Institute of Science and Technology 8916-5 Takayama-choIkomaNara630-0192Japan. Toho University 2-2-1 MiyamaFunabashiChiba274- 8510Japan. Dwango CG Research KADOKAWA Hongo Bldg.5-24-5 HongoBunkyo-kuTokyo113-0033Japan.

Acquiring accurate scattering properties is important for rendering translucent materials. In particular, the phase function, which determines the distribution of scattering directions, plays a significant role in the appearance of a material. We propose a distinctive scattering theory that approximates the effect of single scattering to acquire the non-parametric phase function from a single image. Furthermore, in various experiments, we measured the phase functions from several real diluted media and rendered images of these materials to evaluate the effectiveness of our theory.

关键词： scattering phase function measurement rendering

北海道鲱鱼渔场建筑的谱系——海洋文化传播视角下的建筑空间及其近代化

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新建筑 2024年第2期 53-58页

作者：金子晋也平辉雷蕙玮札幌市立大学日本华南理工大学建筑学院亚热带建筑与城市科学全国重点实验室广州510641 华南理工大学建筑学院广州510641

聚焦日本北海道鲱鱼渔场建筑的结构特征,从历史与环境变迁的交叠对其表现形式进行解读,并梳理其谱系。以18个鲱鱼渔场建筑案例为研究对象,基于相关研究将代表性建筑形式分为5类:19世纪的“运上屋”和“渔家”,以及20世纪前后的“番屋建... 详细信息

聚焦日本北海道鲱鱼渔场建筑的结构特征,从历史与环境变迁的交叠对其表现形式进行解读,并梳理其谱系。以18个鲱鱼渔场建筑案例为研究对象,基于相关研究将代表性建筑形式分为5类:19世纪的“运上屋”和“渔家”,以及20世纪前后的“番屋建筑”“积丹式民家”和“仕込屋”。通过各建筑类型的空间特点总结出两条谱系——从运上屋到仕込屋的谱系,以及从渔家到番屋建筑的谱系——由此论证鲱鱼渔场建筑在19世纪上半叶从日本传统民居派生形成,并在20世纪向渔业生产的功能空间转变的发展脉络;此外,从木构建筑文化的视角来看,南部硕大粗犷的梁柱结构以及北部屋架的抗风雪性能和顶梁柱形式是其突出特征。今后的研究发展方向包括:渔场建筑群整体的产业空间特征,以及日本东北与北海道地区的木构文化传播。

关键词：北海道渔场建筑木构建筑谱系架构

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