检索结果-南通市图书馆

Identification of the nonlinear properties of rubber-bearings in base-isolated buildings with limited seismic response data

引用

Science China(Technological Sciences) 2013年第5期56卷 1224-1231页

作者： lei ying HE MingYu Department of Civil Engineering Xiamen University State Key Laboratory for Disaster Reduction in Civil Engineering Tongji University

Seismic behaviors of base-isolated structures are highly affected by the nonlinear characteristics of the isolated systems. Most of the currently available methods for the identification of nonlinear properties of isolator require either the measurements of all structural responses or the assumptions of the proper mathematic models for the rubber-bearings. In this paper, two algorithms are proposed to identify the nonlinear properties of rubber-bearings in base-isolated buildings using only partial measurements of structural dynamic responses. The first algorithm is applicable to the case that proper mathematical models are available for the base isolators. It is based on the extended Kalman filter for the parametric identification of nonlinear models of rubber-bearing isolators and buildings. For the general case where it is difficult to establish a proper mathematical model to describe the nonlinear behavior of a rubber-bearing isolator, another algorithm is proposed to identify the model-tYee nonlinear property of rubber-bearing isolated system. Nonlinear effect of rubber-bearing is treated as ＇fictitious loading＇ on the linear building under severe earthquake. The algorithm is based on the sequential Kalman estimator for the structural responses and the least-squares estimation of the ＇fictitious loading＇ to identify the nonlinear force of rubber-bearing isolator. Simulation results demonstrate that the proposed two algorithms are capable of identifying the nonlinear properties of rubber-bearing isolated systems with good accuracy.

关键词： base-isolation nonlinearit system identification partial observation model-free extended Kalman filter Kalman esti-mator least-squares estimation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Aerodynamic stability of cable-supported bridges using CFRP cables

引用

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第5期8卷 693-698页

作者： ZHANG Xin-jun ying lei-dong College of Civil Engineering and Architecture Zhejiang University of Technology Hangzhou 310014 China

To gain understanding of the applicability of carbon fiber reinforced polymer (CFRP) cable in cable-supported bridges, based on the Runyang Bridge and Jinsha Bridge, a suspension bridge using CFRP cables and a cable-stayed bridge using CFRP stay cables are designed, in which the cable’s cross-sectional area is determined by the principle of equivalent axial stiffness. Numerical investigations on the aerodynamic stability of the two bridges are conducted by 3D nonlinear aerodynamic stability analysis. The results showed that as CFRP cables are used in cable-supported bridges, for suspension bridge, its aerodynamic stability is superior to that of the case using steel cables due to the great increase of the torsional frequency; for cable-stayed bridge, its aerodynamic stability is basically the same as that of the case using steel stay cables. Therefore as far as the wind stability is considered, the use of CFRP cables in cable-supported bridges is feasible, and the cable’s cross-sectional area should be deter-mined by the principle of equivalent axial stiffness.

关键词： Cable-supported bridges Carbon fiber reinforced polymer (CFRP) cable Aerodynamic stability

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Rewiring local immune milieu by boosting dendritic cell for pancreatic cancer treatment

引用

Signal Transduction and Targeted Therapy 2020年第1期5卷 1445-1446页

作者： Yifan Zhang Qun-ying lei Fudan University Shanghai Cancer Center&Institutes of Biomedical Sciences Cancer InstitutesKey Laboratory of Breast Cancer in ShanghaiThe Shanghai Key Laboratory of Medical EpigeneticsShanghai Medical CollegeFudan UniversityShanghaiChina Department of Oncology Shanghai Medical CollegeFudan UniversityShanghaiChina State Key Laboratory of Medical Neurobiology Fudan UniversityShanghaiChina

A recent article by Hedge et al.(Cancer Cell 37,289–307.e289,2020)demonstrated that decreased dendritic cell and elevated Th17 cell could explain the immunosuppressive environment of PDAC when compared with that in lung *** DC population using Flt3L and CD40 agonist showed improved efficacy on PDAC mouse models and shed new light on its immunotherapeutic strategies.

关键词： al elevated lung

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Anaplastic lymphoma kinase-negative anaplastic large cell lymphoma masquerading as Behcet’s disease: A case report and review of literature

引用

World Journal of Clinical Cases 2019年第20期7卷 3377-3383页

作者： Juan Luo ying-Han Jiang Zi lei ying-lei Miao Department of Gastroenterology the First Affiliated Hospital of Kunming Medical UniversityInstitute of Digestive DiseaseKunming 650000Yunnan ProvinceChina Department of Pathology the First People’s Hospital of Yunnan ProvinceKunming 650000Yunnan ProvinceChina Department of Pathology the First Affiliated Hospital of Kunming Medical UniversityKunming 650000Yunnan ProvinceChina

BACKGROUND Anaplastic large cell lymphoma(ALCL)is a CD30-positive T cell lymphoma,a rare type of non-Hodgkin *** current World Health Organization classification system divides ALCLs into anaplastic lymphoma kinase(ALK)-positive and ALK-negative *** rarely presents in the gastrointestinal *** SUMMARY A 54-year-old male was admitted to the department of gastroenterology for abdominal *** presented with lower abdominal pain,diarrhea and recurrent oral and penile *** was misdiagnosed with Behcet's disease and treated with *** after one month,he was hospitalized in another hospital for *** time,the lesion on the penis was biopsied for histological *** final pathological diagnosis was ALCL,*** patient was treated with cyclophosphamide,doxorubicin,vincristine,prednisolone ***,he died within one *** Gastrointestinal ALCL needs to be considered in the differential diagnosis to avoid delaying *** biopsy is the most important for early diagnosis and treatment.

关键词： Anaplastic large cell lymphoma Anaplastic lymphoma kinase Behcet's disease Colon ulcer Penis ulcer Case report

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Regulation of TAZ in cancer

引用

Protein & Cell 2016年第8期7卷 548-561页

作者： Xin Zhou Qun-ying lei Key Laboratory of Metabolism and Molecular Medicine Ministry of Education and Department of Biochemistry and Molecular Biology and Institutes of Biomedical Sciences Fudan University Shanghai Medical College Shanghai 200032 China Department of Cancer Biology University of Texas MD Anderson Cancer Center Houston TX 77030 USA

TAZ, a transcriptional coactivator with PDZ-binding motif, is encoded by WWTR1 gene （WW domain containing transcription regulator 1）. TAZ is tightly regulated in the hippo pathway-dependent and -independent manner in response to a wide range of extracellular and intrinsic signals, including cell density, cell polarity, F-actin related mechanical stress, ligands of G protein-coupled recep- tors （GPCRs）, cellular energy status, hypoxia and osmo- tic stress. Besides its role in normal tissue development, TAZ plays critical roles in cell proliferation, differentiation, apoptosis, migration, invasion, epithelial-mesenchymal transition （EMT）, and stemness in multiple human cancers. We discuss here the regulators and regulation of TAT. We also highlight the tumorigenic roles of TAZ. and its potential therapeutic impact in human cancers.

关键词： TAZ the Hippo pathway cancer

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Assembling ZnO Nanorods into Microflowers through a Facile Solution Strategy: Morphology Control and Cathodoluminescence Properties

引用

Nano-Micro Letters 2012年第1期4卷 45-51页

作者： ying lei Fengyu Qu Xiang Wu Key Laboratory of Semiconductor Nanocomposite Materials Ministry of Education and College of Chemistry and Chemical EngineeringHarbin Normal University

In this work, flowerlike ZnO micro/nanostructures assembled from nanorods are obtained through a facile hydrothermal route. The experimental results indicated that the as-synthesized ZnO microflowers have an average diameter of 2 μm, composed of nanorods of an average diameter of 200 nm and a tapered *** with other morphologies were also obtained by varying the reaction conditions. Systematical conditiondependent experiments were conducted to reveal the growth mechansim of the microflowers. It is suggested that the zinc source types, solution p H value, and reaction temperature, as well as reaction time are responsible for the variations of ZnO morphology. Luminescence properties of ZnO microflowers were investigated through monitoring different parts of nanorods, showing good optical quality.

关键词： Microflowers Solution growth Zn O Cathodoluminescence

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fast segmentation approach for SAR image based on simple Markov random field

引用

Journal of Systems Engineering and Electronics 2010年第1期21卷 31-36页

作者： Xiaogang lei ying Li Na Zhao Yanning Zhang Department of Computer Science Northwestern Polytechnical University Xi'an 710072 E R. China

Traditional image segmentation methods based on MRF converge slowly and require pre-defined weight. These disadvantages are addressed, and a fast segmentation approach based on simple Markov random field （MRF） for SAR image is proposed. The approach is firstly used to perform coarse segmentation in blocks. Then the image is modeled with simple MRF and adaptive variable weighting forms are applied in homogeneous and heterogeneous regions. As a result, the convergent speed is accelerated while the segmentation results in homogeneous regions and boarders are improved. Simulations with synthetic and real SAR images demonstrate the effectiveness of the proposed approach.

关键词： SAR image segmentation simple Markov random field coarse segmentation maximum a posterior iterated condition mode.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Information compression and speckle reduction for multifrequency polarimetric SAR images based on kernel PCA

引用

Journal of Systems Engineering and Electronics 2008年第3期19卷 493-498页

作者： Li ying lei Xiaogang Bai Bendu Zhang Yanning Dept. of Computer Science and Engineering Northwest Polytechnical Univ. Xi'an 710072 P. R. China

Multifrequency polarimetric SAR imagery provides a very convenient approach for signal processing and acquisition of radar image. However, the amount of information is scattered in several images, and redundancies exist between different bands and polarizations. Similar to signal-polarimetric SAR image, multifrequency polarimetric SAR image is corrupted with speckle noise at the same time. A method of information compression and speckle reduction for multifrequency polarimetric SAR imagery is presented based on kernel principal component analysis （KPCA）. KPCA is a nonlinear generalization of the linear principal component analysis using the kernel trick. The NASA/JPL polarimetric SAR imagery of P, L, and C bands quadpolarizations is used for illustration. The experimental results show that KPCA has better capability in information compression and speckle reduction as compared with linear PCA.

关键词： kernel PCA multifrequency polarimetric SAR imagery information compression despeckling.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Identification of flexible buildings with bending deformation and the unmeasured earthquake ground motion

引用

Science China(Technological Sciences) 2015年第3期58卷 454-461页

作者： lei ying HE MingYu LAI ZhiLu LIN ShuZhi Department of Civil Engineering Xiamen University State Key Laboratory for Disaster Reduction in Civil Engineering Tongji University Department of Civil and Environmental Engineering Rice University Xiamen Construction and Management Bureau

It is important to explore efficient algorithms for the identification of both structural parameters and unmeasured earthquake ground ***,the authors proposed an algorithm for the identification of shear-type buildings and unknown earthquake *** this paper,it is extended to the investigation of the identification of flexible buildings with bending deformation and the unmeasured earthquake ground *** the absolute co-ordinate system,the unmeasured ground motion can be treated as an unknown translational force and a bending moment at the 1st floor level of a flexible *** unknown parameters above the 1st story of the building can be identified by the extended Kalman estimator and the 1st story stiffness and the unmeasured ground motion are subsequently estimated based on the least-squares *** proposed algorithm is further extended to the identification of tall bending-type buildings based on substructure ***-connection effect between sub-buildings is treated as‘additional unknown inputs’to sub-buildings,which are estimated by the extended Kalman estimator without the measurements of rotational *** examples demonstrate the identification of a multi-story,tall bending-type building and its unmeasured earthquake ground motions using only partial measurements of structural absolute responses.

关键词： flexible building bending deformation structural identification unknown ground motion extended Kalman estimator substructure approach

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Towards a bright future： polymer solar cells with power conversion efficiencies over 10%

引用

Science China Chemistry 2017年第5期60卷 571-582页

作者： Zhicheng Hu lei ying Fei Huang Yong Cao State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSouth China University of Technology

Remarkable progress in high-performance polymer solar cells demonstrates their great potential for practical applications in the near future. Indeed, the power conversion efficiencies over 10% have been reported by many research groups, which are achieved through rational optimization of light-harvesting materials, interfaces and device processing technologies. In this mini review, we summarized the recent progress of highly efficient polymer solar cells, with specifically concern on successful strategies of rational molecular design of electron-donating and electron-accepting materials, elaborative interfacial engineering, and reasonable device architectures.

关键词： polymer solar cells donor/acceptor design interface engineering device engineering

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：