检索结果-南通市图书馆

Femtojoule electro-optic modulation using a silicon– organic hybrid device

Light(Science & Applications) 2015年第1期4卷 483-490页

作者： Sebastian Koeber Robert Palmer Matthias Lauermann Wolfgang Heni Delwin L Elder dietmar korn Markus Woessner Luca Alloatti Swen Koenig Philipp C Schindler Hui Yu Wim Bogaerts Larry R Dalton Wolfgang Freude Juerg Leuthold Christian Koos Institute of Photonics and Quantum Electronics(IPQ)and Institute of Microstructure Technology(IMT) Karlsruhe Institute of Technology(KIT)76131 KarlsruheGermany Now with:Institute of Electromagnetic Fields Swiss Federal Institute of Technology(ETH)ZurichSwitzerland University of Washington Department of ChemistrySeattleWA 98195-1700USA Now with:Massachusetts Institute of Technology Research Lab of Electronics(RLE)CambridgeMA 02139USA Now with:Infinera Corporation SunnyvaleCAUSA Ghent University–IMEC Photonics Research GroupDepartment of Information TechnologyGentBelgium Now with:Department of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310027China

Energy-efficient electro-optic modulators are at the heart of short-reach optical interconnects,and silicon photonics is considered the leading technology for realizing such ***,the performance of all-silicon devices is limited by intrinsic material *** particular,the absence of linear electro-optic effects in silicon renders the integration of energy-efficient photonic–electronic interfaces ***–organic hybrid(SOH)integration can overcome these limitations by combining nanophotonic silicon waveguides with organic cladding materials,thereby offering the prospect of designing optical properties by molecular *** this paper,we demonstrate an SOH Mach–Zehnder modulator with unprecedented efficiency:the 1-mm-long device consumes only 0.7 fJ bit^(-1) to generate a 12.5 Gbit s^(-1) data stream with a bit-error ratio below the threshold for hard-decision forward-error *** power consumption represents the lowest value demonstrated for a non-resonant Mach–Zehnder modulator in any material *** is enabled by a novel class of organic electro-optic materials that are designed for high chromophore density and enhanced molecular *** device features an electro-optic coefficient of r33<180 pm V^(-1) and can be operated at data rates of up to 40 Gbit s^(-1).

关键词： electro-optic materials electro-optic modulation nonlinear organic materials silicon-organic hybrid

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

Peripheral immune cell-derived matrix metalloprotease 8(MMP8):brain trafficking promotes depression-like behavior

引用

Signal Transduction and Targeted Therapy 2024年第6期9卷 2357-2358页

作者： dietmar Spengler Theo Rein Max Planck Institute of Psychiatry Epigenomics of Early-Life Stress80804 MunichGermany Max Planck Institute of Psychiatry Molecular Pathways of Depression80804 MunichGermany

In a study recently published in Nature,Cathomas et al.1 report that social stress in mice increases the levels of matrix metalloprotease(MMP)8 in circulating immune cells,thereby altering extracellular space(ECS)and neuronal activity,and ultimately social behavior in susceptible *** deficits resembled those from major depressive disorder(MDD)raising the prospect of MMP8 as a new druggable target in tailored treatments.

关键词： MMP8 al. behavior

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

Inhibition of tubulin detyrosination:a novel strategy to promote central nervous system regeneration

引用

Neural Regeneration Research 2024年第12期19卷 2557-2558页

作者： Charlotte Zeitler Marco Leibinger dietmar Fischer Center of Pharmacology Institute for PharmacologyMedical Faculty and University of CologneCologneGermany

The adult mammalian central nervous system(CNS) coordinates essential functions such as sensation,movement,autonomic control,thought processes,and ***,injuries or diseases of the CNS are often associated with devastating and permanent functional impairments because damaged axons normally fail to *** insufficient neuron-intrinsic growth capacity and an inhibitory environment at the injury site are the leading causes of this regenerative failure.

关键词： injuries sensation diseases

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

乘用车前部造型的改变对行人下肢损伤的影响研究

引用

振动与冲击 2024年第9期43卷 291-297页

作者：王丙雨刘天泉韩勇 Otte dietmar 秦利燕李红厦门理工学院机械与汽车工程学院福建厦门361024 福建省客车及特种车辆研发协同创新中心福建厦门361024 福建省客车先进设计与制造重点实验室福建厦门361024 汉诺威医学院事故调查科德国汉诺威30625 国汽(北京)智能网联汽车研究院有限公司北京100029

研究了欧盟行人保护指令发布后车辆前部造型的变化,以及该变化对行人下肢损伤的影响。为此,在德国深度事故调查数据库选取了283起带有行人下肢损伤的事故案例,并将事故案例以欧洲行人保护指令发布时间为界限分为两组。首先采用描述性统... 详细信息

研究了欧盟行人保护指令发布后车辆前部造型的变化,以及该变化对行人下肢损伤的影响。为此,在德国深度事故调查数据库选取了283起带有行人下肢损伤的事故案例,并将事故案例以欧洲行人保护指令发布时间为界限分为两组。首先采用描述性统计方法统计了两组案例中各个事故车辆前部结构值,然后利用威尔科克森符号秩检验找出两组案例车型中具有显著差异的前部结构参数,最后通过二元逻辑回归分别建立两组案例车型与行人下肢严重损伤和腓骨/胫骨骨折风险曲线,分析行人保护指令发布后车辆前部造型的改变及对行人下肢损伤的影响。研究结果表明,新的车型具有更宽的前保险杠和更浅的保险杠伸出量,更高的引擎盖前缘以及更低的副保险杠下缘高度。在0~40 km/h的碰撞速度内,对于年龄不超过60岁的行人,行人保护指令发布后生产的车型对行人整体下肢严重损伤和腓骨/胫骨的保护性能相比于以往的车型均有所提高。

关键词：符号秩检验逻辑回归行人下肢损伤风险汽车前部结构参数

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

Plant Sucrose Transporters from a Biophysical Point of View

引用

Molecular Plant 2011年第3期4卷 395-406页

作者： dietmar Geiger Julius-von-Sachs Institute Molecular Plant Physiology and Biophysics University W6rzburg Julius-von-Sachs Platz 2 D-97082 W~rzburg Germany

The majority of higher plants use sucrose as their main mobile carbohydrate. Proton-driven sucrose trans- porters play a crucial role in cell-to-cell and long-distance distribution of sucrose throughout the plant. A very negative plant membrane potential and the ability of sucrose transporters to accumulate sucrose concentrations of more than 1 M indicate that plants evolved transporters with unique structural and functional features. The knowledge about the trans- port mechanism and structural/functional domains of these the current knowledge about the biophysical properties of nano-machines is, however, still fragmentary. In this review, plant sucrose transporters is summarized and discussed.

关键词： Biophysics electrophysiology transport processes/kinetics phloem physiology phloem unloading sucrose transport.

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

Connecting Race to Ethics Related to Technology:A Call for Critical Tech Ethics

引用

Journal of Social Computing 2021年第4期2卷 357-364页

作者： Jenny Ungbha korn the Berkman Klein Center for Internet and Society Harvard UniversityCambridgeMA 02138USA

Critical tech ethics is my call for action to influencers,leaders,policymakers,and educators to help move our society towards centering race,deliberately and intentionally,to tech *** too long,when“ethics”is applied broadly across different kinds of technology,ethics does not address race explicitly,including how diverse forms of technologies have contributed to violence against and the marginalization of communities of *** several years of research,I have studied online behavior to evaluate gender and racial biases.I have concluded that a way to improve technologies,including the Internet,is to create a specific type of ethics termed“critical tech ethics”that connects race to ethics related to *** article covers guiding theories for discovering critical tech ethical challenges,contemporary examples for illustrating critical tech ethical challenges,and institutional changes across business,education,and civil society actors for teaching critical tech ethics and encouraging the integration of critical tech ethics with undergraduate computer *** tech ethics has been developed with the imperative to help improve society through connecting race to ethics related to technology,so that we may reduce the propagation of racial injustices currently occurring by educational institutions,technology corporations,and civil *** aim is to improve racial equity through the development of critical tech ethics as research,teaching,and practice in social norms,higher education,policy making,and civil society.

关键词： race gender ethics tech bias equity society policy

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

Synthetic demand data generation for individual electricity consumers :Generative Adversarial Networks (GANs)

引用

能源与人工智能(英文) 2022年第3期9卷 37-50页

作者： Bilgi Yilmaz Ralf korn TU Kaiserslautern KaiserslauternGermany Kahramanmaras Sutcu Imam University KahramanmarasTurkey Fraunhofer ITWM KaiserslauternGermany

Load modeling is one of the crucial tasks for improving smart grids’ energy efficiency. Among manyalternatives, machine learning-based load models have become popular in applications and have shownoutstanding performance in recent years. The performance of these models highly relies on data quality andquantity available for training. However, gathering a sufficient amount of high-quality data is time-consumingand extremely expensive. In the last decade, Generative Adversarial Networks (GANs) have demonstrated theirpotential to solve the data shortage problem by generating synthetic data by learning from recorded/empiricaldata. Educated synthetic datasets can reduce prediction error of electricity consumption when combined withempirical data. Further, they can be used to enhance risk management calculations. Therefore, we proposeRCGAN, TimeGAN, CWGAN, and RCWGAN which take individual electricity consumption data as input toprovide synthetic data in this study. Our work focuses on one dimensional times series, and numericalexperiments on an empirical dataset show that GANs are indeed able to generate synthetic data with realisticappearance.

关键词： Electricity consumption Generative adversarial networks Synthetic data generation Unsupervised learning RCGAN TimeGAN CWGAN RCWGAN

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

A ROBUST DISCRETIZATION OF THE REISSNER-MINDLIN PLATE WITH ARBITRARY POLYNOMIAL DEGREE

引用

Journal of Computational Mathematics 2020年第1期38卷 1-13页

作者： dietmar Gallistl Mira Schedensack Friedrich-Schiller-Universitdt Jena 07737 JenaGermany Universitat Leipzig PF 10092004009 LeipzigGermany

A numerical scheme for the Reissner-Mindlin plate model is *** method is based on a discrete Helmholtz decomposition and can be viewed as a generalization of the nonconforming finite element scheme of Arnold and Falk[SIAM ***.,26(6):1276-1290,1989].The two unknowns in the discrete formulation are the in-plane rotations and the gradient of the vertical *** decomposition of the discrete shear variable leads to equivalence with the usual Stokes system with penalty term plus two Poisson equations and the proposed method is equivalent to a stabilized discretization of the Stokes system that generalizes the Mini *** method is proved to satisfy a best-approximation result which is robust with respect to the thickness parameter t.

关键词： Reissner-Mindlin plate Nonconforming finite element Discrete Helmholtz decomposition Robustness

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

BRAIN INJURY BIOMECHANICS IN REAL WORLD VEHICLE ACCIDENT USING MATHEMATICAL MODELS

引用

Chinese Journal of Mechanical Engineering 2008年第4期21卷 81-86页

作者： YANG Jikuang XU Wei OTTE dietmar State Key Laboratory of Advanced Design and Manufacture for Vehicle Body Hunan University Changsha 410082 China Accident Research Unit Medical University HannoverHannover D-30623 Germany

This paper aims at investigating brain injury mechanisms and predicting head injuries in real world accidents. For this purpose, a 3D human head finite element model （HBM-head） was developed based on head-brain anatomy. The HBM head model was validated with two experimental tests. Then the head finite element（FE） model and a multi-body system （MBS） model were used to carry out reconstructions of real world vehicle-pedestrian accidents and brain injuries. The MBS models were used for calculating the head impact conditions in vehicle impacts. The HBM-head model was used for calculating the injury related physical parameters, such as intracranial pressure, stress, and strain. The calculated intracranial pressure and strain distribution were correlated with the injury outcomes observed from accidents. It is shown that this model can predict the intracranial biomechanical response and calculate the injury related physical parameters. The head FE model has good biofidelity and will be a valuable tool for the study of injury mechanisms and the tolerance level of the brain.

关键词： Skull-brain FE model Head injury Real-world vehicle accident

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

The Fingerprint of Global Warming in the Tropical Pacific

引用

Advances in Atmospheric Sciences 2016年第4期33卷 I0001-I0002页

作者： Noel KEENLYSIDE dietmar DOMMENGET Geophysical Institute University of Bergen/Bjerknes Center for Climate Research Bergen 5007 Norway Nansen Environmental and Remote Sensing Center/Bjerknes Center for Climate Research Bergen 5006 Norway ARC Centre of Excellence for Climate System Science School of Earth Atmosphere and Environment Monash University Clayton VIC Australia

The impacts of global warming will be felt most strongly at regional scales. However, great uncertainties exist in climate change projections at these scales, limiting our ability to provide useful information for the planning and implementation of appropriate adaptation measures. Thus, there is an urgent need to reduce these uncertainties.

关键词： EPSW The Fingerprint of Global Warming in the Tropical Pacific

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：