检索结果-南通市图书馆

Least-Squares Solution of Inverse Problem for Hermitian Anti-reflexive Matrices and Its Appoximation

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2006年第2期22卷 477-484页

作者： Zhen Yun PENG yuan bei DENG Jin Wang LIU Department of Mathematics Hunan University of Science and Technology Department of Mathematics Central South University Institute of Computational Mathematics Chinese Academy of Sciences

In this paper, we first consider the least-squares solution of the matrix inverse problem as follows： Find a hermitian anti-reflexive matrix corresponding to a given generalized reflection matrix J such that for given matrices X, B we have minA ｜｜AX - B｜｜. The existence theorems are obtained, and a general representation of such a matrix is presented. We denote the set of such matrices by SE. Then the matrix nearness problem for the matrix inverse problem is discussed. That is： Given an arbitrary A^＊, find a matrix A E SE which is nearest to A^＊ in Frobenius norm. We show that the nearest matrix is unique and provide an expression for this nearest matrix.

关键词： hermitian reflexive matrix hermitian anti-reflexive matrix matrix norm nearest matrix

First Observation of Neoclassical Tearing Modes in the HL-2A Tokamak

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2010年第6期27卷 137-140页

作者： JI Xiao-Quan YANG Qing-Wei LIU Yi ZHOU Jun FENG bei-Bin yuan Bao-Shan Southwestern Institute of Physics Chengdu 610041

The m/n = 2/1 neoclassical tearing modes are first observed in HL-2A low density, low beta plasma with central electron cyclotron resonance heating. The neoclassical tearing modes （NTMs） are triggered by a sawtooth crash with m/n = 1/1 precursors, which are toroidal coupled with a small scale m/n = 2/1 mode. The time history of the island width is compared with the prediction of the NTM theory, showing a good agreement between theory and experiment.

关键词： OBSERVATION (Scientific method) TOKAMAKS PLASMA (Ionized gases) ELECTRON cyclotron resonance sources HEATING MAGNETIC fields PREDICTION models

Massive pulmonary haemorrhage due to severe trauma treated with repeated alveolar lavage combined with extracorporeal membrane oxygenation:A case report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2020年第18期8卷 4245-4251页

作者： bei-yuan Zhang Xian-Cheng Chen Yong You Ming Chen Wen-Kui Yu Department of Critical Care Medicine Nanjing Drum Tower HospitalThe Affiliated Hospital of Nanjing University Medical SchoolNanjing 210008Jiangsu ProvinceChina

BACKGROUND Massive pulmonary haemorrhage can spoil the entire lung and block the airway in a short period of time due to severe bleeding,which quickly leads to *** lavage is an effective method for haemostasis and airway ***,patients often cannot tolerate alveolar lavage due to severe *** used extracorporeal membrane oxygenation(ECMO)to overcome this limitation in a patient with massive pulmonary haemorrhage due to severe trauma and succeeded in saving the life by repeated alveolar *** SUMMARY A 22-year-old man sustained multiple injuries in a motor vehicle accident and was transferred to our emergency *** admission,he had a slight cough and a small amount of bloody sputum;computed tomography revealed multiple fractures and mild pulmonary *** 37 h after admission,he developed severe chest tightness,chest pain,dizziness and *** oxygen saturation was 68%.Emergency endotracheal intubation was performed,and a large amount of bloody sputum was *** transfer to the intensive care unit,he developed refractory hypoxemia and heparin-free venovenous ECMO was *** bronchoscopy revealed diffuse and profuse blood in all bronchopulmonary *** was observed in the trachea and right bronchus,and repeated alveolar lavage was *** day 3,the patient’s haemoptysis ceased,and ECMO support was terminated 10 d *** was performed on day 15,and the patient was weaned from the ventilator on day *** Alveolar lavage combined with ECMO can control bleeding in trauma-induced massive pulmonary haemorrhage,is safe and can be performed bedside.

关键词： Pulmonary contusion Massive pulmonary haemorrhage Alveolar lavage Extracorporeal membrane oxygenation Case report

Association between HLA-DR Expression and Multidrug-resistant Infection in Patients with Severe Acute Pancreatitis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Medical Science 2018年第3期38卷 449-454页

作者： Zhu-xi YU Xian-cheng CHEN bei-yuan ZHANG Ning LIU Qin GU Department of Critical Care Medicine the Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjing 210008 China

Multidrug-resistant （MDR） bacterial infection is a common complication of severe acute pancreatitis （SAP）. This study aimed to explore the association between human leukocyte antigen-antigen D-related （HLA-DR） expression and multidrug-resistant infection in patients with SAP. A total of 24 SAP patients who were admitted to Nanjing Drum Tower Hospital between May 2015 and December 2016 were enrolled in the study. The percentages of CD4^＋, CD8^＋, natural killer （NK）, and HLA-DR （CD14＋） cells and the CD4^＋/CD8^＋ cell ratio on days 1, 7, 14, and 28 after admission were determined by flow cytometry. Eighteen patients presented with the symptoms of infection. Among them, 55.6% patients （10/18） developed MDR infection. The most common causative MDR organisms were Enterobacter cloacae and Acinetobacter baumannii. The CD4＋/CD8＋ cell ratio and the percentage of NK cells were similar between patients with non-MDR and patients with MDR infections. In patients without infection, the HLA-DR percentage was maintained at a high level throughout the 28 days. Compared to the patients without any infection, the HLA-DR percentage in patients with non-MDR infection was reduced on day 1 but increased and reached similar levels on day 28. In patients with MDR infection, the HLA-DR percentage remained below normal levels at all-time points. It was concluded that persistent down-regulation of HLA-DR expression is associated with MDR bacterial infection in patients with SAP.

关键词： severe acute pancreatitis (SAP) immunomonitoring human leukocyte antigen-antigen D-related (HLA-DR) multidrug-resistant infection

g-C_(3)N_(4) Photocatalysts:Utilizing Electron-Hole Pairs for Boosted Redox Capability in Water Splitting

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Material Advances 2023年第1期4卷 304-330页

作者： Grayson Zhi Sheng Ling Valerie bei-yuan Oh Choon Yian Haw Lling-Lling Tan Wee-Jun Ong School of Energy and Chemical Engineering Xiamen University MalaysiaSepangSelangor Darul Ehsan43900Malaysia Center of Excellence for NaNo Energy&Catalysis Technology(CONNECT) Xiamen University MalaysiaSepangSelangor Darul Ehsan43900Malaysia State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China Multidisciplinary Platform of Advanced Engineering Chemical Engineering DisciplineSchool of EngineeringMonash UniversityJalan Lagoon SelatanBandar SunwaySelangor47500Malaysia Shenzhen Research Institute of Xiamen University Shenzhen518057China Gulei Innovation Institute Xiamen UniversityZhangzhou363200China

Since the first discovery of solar-driven water splitting catalyzed by TiO_(2) semiconductors,extensive research works have been devoted over the ***,the design of a photocatalyst with dual redox potential is of prominent interest to fully utilize both photogenerated electrons and holes in the redox *** all,the coproduction of H_(2) and O_(2) from water using metal-free carbon nitride(g-C_(3)N_(4))has been viewed as a rising star in this ***,the hole-mediated oxidation reaction is commonly recognized as the rate-determining step,which drastically leads to poor overall water splitting *** top of that,rapid recombination and undesirable back reaction appeared as one of the challenging parts in overall water *** this review,the up-to-date advances in modified g-C_(3)N_(4)-based photocatalysts toward efficient overall water splitting are summarized,which are mainly classified into structural and defect engineering,single-atom catalysis,cocatalyst loading,and heterojunction *** review also addresses the underlying idea and concept to tackle the aforementioned problem with the use of emerging modification strategies,hence serving as the guiding star for future *** the outstanding breakthrough thus far,critical recommendations related to g-C_(3)N_(4) photocatalytic systems are prospected to pave the way toward the implementation in the practical energy production process.

关键词： process splitting catalyst

Repetitive transcranial magnetic stimulation enhanced by neuronavigation in the treatment of depressive disorder and schizophrenia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Psychiatry 2024年第11期14卷 1618-1622页

作者： Xian-Yang Wang yuan-bei Zhang Rong-Xue Mu Long-Biao Cui Hua-Ning Wang Schizophrenia Imaging Laboratory Xijing 986 HospitalFourth Military Medical UniversityXi’an 710054Shaanxi ProvinceChina Simon Fraser University Vancouver V5A1S6British ColumbiaCanada Shaanxi Provincial Key Laboratory of Clinic Genetics Fourth Military Medical UniversityXi’an 710032Shaanxi ProvinceChina Department of Radiology The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061Shaanxi ProvinceChina Department of Psychiatry Xijing HospitalFourth Military Medical UniversityXi’an 710032Shaanxi ProvinceChina

This editorial assesses the advancements in neuronavigation enhanced repetitive transcranial magnetic stimulation for depressive disorder and schizophrenia *** repetitive transcranial magnetic stimulation faces challenges due to the intricacies of brain anatomy and patient *** offers innovative solutions by integrating neuroimaging with three-dimensional localization to pinpoint brain regions and refine therapeutic *** systematic review of recent literature underscores the enhanced efficacy of neuronavigation in improving treatment outcomes for these *** editorial highlights the pivotal role of neuronavigation in advancing psychiatric care.

关键词： Repetitive transcranial magnetic stimulation Neuronavigation Depressive disorder Schizophrenia Psychiatric care

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

辩证法与主体:马克思和青年卢卡奇论黑格尔

哲学研究 2020年第3期 42-51页

作者：袁蓓南开大学马克思主义学院

马克思与黑格尔的关系问题是事关马克思历史辩证法及其主体向度理解的重要理论问题。为反叛第二国际理论家将辩证法庸俗化为缺乏内容奠基的形式方法,青年卢卡奇开辟出“近黑格尔阐释”路径,立足于“总体”范畴确证深入社会历史现实的辩... 详细信息

马克思与黑格尔的关系问题是事关马克思历史辩证法及其主体向度理解的重要理论问题。为反叛第二国际理论家将辩证法庸俗化为缺乏内容奠基的形式方法,青年卢卡奇开辟出“近黑格尔阐释”路径,立足于“总体”范畴确证深入社会历史现实的辩证法。但其与马克思返回黑格尔诉诸于历史辩证法仍有根本区别。马克思的历史辩证法并不缺乏关怀人类生存境遇的主体向度,为此他在《资本论》中洞察到资本的自我活动与“绝对理念”辩证运动的内在相似性,揭示了资本作为“同一的主体-客体”对人之主体性地位与作用的消解。青年卢卡奇则基于劳动本体论指认社会历史的总体由劳动建构,强调无产阶级作为历史中“同一的主体-客体”通过自我认识能够打破资本主义物化现实,但这一主体解放策略因强烈的主观主义色彩备受批评。

关键词：辩证法主体黑格尔马克思青年卢卡奇

主体之死抑或主体的重建?——巴迪欧“哲学宣言”中的主体思想研究

在线全文

学校读者我要写书评

暂无评论

教学与研究 2015年第7期 72-77页

作者：袁蓓北京大学哲学系北京100871

当代法国哲学受结构主义影响出现"主体之死"的转向,而"主体之死"从更宏观理论视野又可视为是当代"哲学之死"的表征和回应。对此,巴迪欧主张一种真理性哲学与主体的当代重建。但是,巴迪欧新的哲学与主体的重建本质上并未脱离后现代激进... 详细信息

当代法国哲学受结构主义影响出现"主体之死"的转向,而"主体之死"从更宏观理论视野又可视为是当代"哲学之死"的表征和回应。对此,巴迪欧主张一种真理性哲学与主体的当代重建。但是,巴迪欧新的哲学与主体的重建本质上并未脱离后现代激进理论的问题域,即在反叛传统马克思主义诉诸"阶级主体"规划的历史性叙事逻辑过程中,走向一种纯粹的话语竞争。

关键词：主体之死巴迪欧历史性叙事

偶然相遇的唯物主义——阿尔都塞晚期哲学思想转向中的马基雅维利因素

在线全文

学校读者我要写书评

暂无评论

学术研究 2024年第9期 29-35页

作者：袁蓓北京大学马克思主义学院北京100871

在学界普遍的理解中,阿尔都塞一直以来都因其理论上的反人道主义而被视为科学的马克思主义的捍卫者。但是伴随对马克思主义哲学的重释,阿尔都塞在学术生涯的晚期发生了深刻的哲学思想转向。这一“转向”既可被看成是对“马克思主义的危... 详细信息

在学界普遍的理解中,阿尔都塞一直以来都因其理论上的反人道主义而被视为科学的马克思主义的捍卫者。但是伴随对马克思主义哲学的重释,阿尔都塞在学术生涯的晚期发生了深刻的哲学思想转向。这一“转向”既可被看成是对“马克思主义的危机”的回应,同时又标志着一种新唯物主义话语的确立。为了反叛传统目的论哲学,阿尔都塞创造性地奠基于“偶然相遇”的叙述逻辑重构唯物主义,从而与马基雅维利所建构的政治哲学深切关联,即二者都强调对具体的政治行动条件及历史形势作出具体分析,以开启一种指向历史的革新和创造的解放政治实践。

关键词：晚期阿尔都塞哲学转向偶然相遇的唯物主义马基雅维利