检索结果-南通市图书馆

Methodical Approach to the Development of a Radar Sensor Model for the Detection of Urban Traffic Participants Using a Virtual Reality Engine

引用

Journal of Transportation Technologies 2021年第2期11卷 179-195页

作者： Rene Degen Harry ott Fabian Overath Christian Schyr Mats Leijon Margot Ruschitzka CAD CAM Center Cologne Institute of Automotive Engineering Cologne (IFK) Faculty of Automotive Systems and Production Cologne University of Applied Science Cologne Germany Division of Electricity Department of Electrical Engineering Uppsala University Uppsala Sweden Advanced Solution Lab AVL Deutschland GmbH Karlsruhe Germany

New approaches for testing of autonomous driving functions are using Virtual Reality (VR) to analyze the behavior of automated vehicles in various scenarios. The real time simulation of the environment sensors is still a challenge. In this paper, the conception, development and validation of an automotive radar raw data sensor model is shown. For the implementation, the Unreal VR engine developed by Epic Games is used. The model consists of a sending antenna, a propagation and a receiving antenna model. The microwave field propagation is simulated by a raytracing approach. It uses the method of shooting and bouncing rays to cover the field. A diffused scattering model is implemented to simulate the influence of rough structures on the reflection of rays. To parameterize the model, simple reflectors are used. The validation is done by a comparison of the measured radar patterns of pedestrians and cyclists with simulated values. The outcome is that the developed model shows valid results, even if it still has deficits in the context of performance. It shows that the bouncing of diffuse scattered field can only be done once. This produces inadequacies in some scenarios. In summary, the paper shows a high potential for real time simulation of radar sensors by using ray tracing in a virtual reality.

关键词： Advanced Driver Assistance Systems (ADAS) Autonomous Mobility Diffuse Scattering Microwave Propagation Radar Raw Data Raytracing Sensor Simulation

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

Sildenafil does not influence hepatic venous pressure gradient in patients with cirrhosis

引用

World Journal of Gastroenterology 2008年第40期14卷 6208-6212页

作者： Jens otto Clemmesen Annamaria Giraldi Peter ott Kim Dalhoff Bent Adel Hansen Fin Stolze Larsen Department of Hepatology RigshospitaletUniversity Hospital of Copenhagen Clinical Pharmacology RigshospitaletUniversity Hospital of Copenhagen

AIM： To investigate if sildenafil increases splanchnic blood flow and changes the hepatic venous pressure gradient （HVPG） in patients with cirrhosis. Phosphodiesterase type-5 inhibitors are valuable in the treatment of erectile dysfunction and pulmonary hypertension in patients with end-stage liver disease. However, the effect of phosphodiesterase type-5 inhibitors on splanchnic blood flow and portal hypertension remains essentially unknown. METHODS： Ten patients with biopsy proven cirrhosis （five females/five males, mean age 54：1：8 years） and an HVPG above 12 mmHg were studied after informed consent. Measurement of splanchnic blood flow and the HVPG during liver vein catheterization were done before and 80 min after oral administration of 50 mg sildenafil. Blood flow was estimated by use of indocyanine green clearance technique and Fick＇s principle, with correction for non-steady state. RESULTS： The plasma concentration of sildenafil was 222 ± 136 ng/mL 80 min after administration. Mean arterial blood pressure decreased from 77 ±7 mmHg to 66 ± 12 mmHg, P = 0.003, while the splanchnicblood flow and oxygen consumption remained unchanged at 1.14 ± 0.71 L/min and 2.3 ± 0.6 mmol/ min, respectively. Also the HVPG remained unchanged （18 ± 2 mmHg vs 16 ± 2 mmHg） with individual changes ranging from -8 mmHg to ±2 mmHg. In seven patients, HVPG decreased and in three it increased. CONCLUSION： In spite of arterial blood pressure decreases 80 min after administration of the phosphodiesterase type-5 inhibitor sildenafil, the present study could not demonstrate any clinical relevant influence on splanichnic blood flow, oxygen consumption or the HVPG.

关键词： Cirrhosis Sildenafil Portal hypertension Portal hemodynamics Hepatic blood flow Erectile dysfunction Hepatic venous pressure gradient

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

优化你的新设备

引用

新电脑 2007年第1期 152-158页

作者： Nicole ott

对那些刚购买了新设备的用户而言,很多时候他们并不知道要如何做才能完全使用新设备的全部功能。其实,无论是新购买的笔记本电脑还是新添加的硬件,都需要进行一定的优化。CHIP将为你系统地介绍如何优化新购买的设备,从智能手机到网络设... 详细信息

对那些刚购买了新设备的用户而言,很多时候他们并不知道要如何做才能完全使用新设备的全部功能。其实,无论是新购买的笔记本电脑还是新添加的硬件,都需要进行一定的优化。CHIP将为你系统地介绍如何优化新购买的设备,从智能手机到网络设备,从MP3播放机到新笔记本电脑,使你在看过本文之后,对这些设备不再陌生。

关键词：磁盘分区显示芯片演示版网络路由器 BIOS 功能磁盘空间设备管理器手机文件系统操作系统驱动程序编译程序软件笔记本电脑笔记本计算机恢复系统 NCQ 加密算法密码算法存储空间固件程序

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

功能有序分隔的开放式办公空间——新型南蒂罗尔人民银行总部

引用

设计家 2016年第1期 78-83页

作者： Paul ott INNOCAD Berg&Tal

INNOCAD与Berg＆Tal建筑师事务所合作,为在博尔扎诺的南蒂罗尔人民银行总部进行办公空间设计.项目设计的特点是突出南蒂罗尔人民银行总部的专业性.一方面,设计团队专门设计木制家具,提供必要的存储空间.一个非常独特的,质朴的橡木贴面设... 详细信息

INNOCAD与Berg＆Tal建筑师事务所合作,为在博尔扎诺的南蒂罗尔人民银行总部进行办公空间设计.项目设计的特点是突出南蒂罗尔人民银行总部的专业性.一方面,设计团队专门设计木制家具,提供必要的存储空间.一个非常独特的,质朴的橡木贴面设计,不仅提供了现代的外观,同时有助于空间的功能区分.

关键词：人民银行办公空间功能区开放式项目设计分隔有序建筑师事务所

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

Homologous recombination mediates stable Fah gene integration and phenotypic correction in tyrosinaemia mouse-model

引用

World Journal of Hepatology 2018年第2期10卷 277-286页

作者： Norman Junge Qinggong Yuan Thu Huong Vu Simon Krooss Christien Bednarski Asha Balakrishnan Toni Cathomen Michael P Manns Ulrich Baumann Amar Deep Sharma Michael ott Department of Pediatric Gastroenterology and Hepatology Hannover Medical School Department of Gastroenterology Hepatology and Endocrinology Hannover Medical School TWINCORE Centre for Experimental and Clinical Infection Research Medical Center University of Freiburg Institute for Cell and Gene Therapy Research Group Micro RNA in Liver Regeneration Cluster of Excellence REBIRTH Hannover Medical School

AIM To stably correct tyrosinaemia in proliferating livers of fumarylacetoacetate-hydrolase knockout(Fah-/-) mice by homologous-recombination-mediated targeted addition of the Fah *** C57 BL/6 Fah?exon5 mice served as an animal model for human tyrosinaemia type 1 in our study. The vector was created by amplifying human Fah c DNA including the TTR promoter from a lentivirus plasmid as described. The Fah expression cassette was flanked by homologous arms(620 bp and 749 bp long) of the Rosa26 gene locus. Mice were injected with 2.1 × 108 VP of this vector(r ***) via the tail vein. Mice in the control group were injected with 2.1 × 108 VP of a similar vector but missing the homologous arms(r ***). Primary hepatocytes from Fah-/-recipient mice, treated with our vectors, were isolated and 1 × 106 hepatocytes were transplanted into secondary Fah-/-recipient mice by injection into the spleen. Upon either vector application or hepatocyte transplantation NTBC treatment was stopped in recipient mice. RESULTS Here, we report successful HR-mediated genome editing by integration of a Fah gene expression cassette into the "safe harbour locus" Rosa26 by recombinant AAV8. Both groups of mice showed long-term survival, weight gain and FAH positive clusters as determined by immunohistochemistry analysis of liver sections in the absence of NTBC treatment. In the group of C57 BL/6 Fah?exon5 mice, which have been transplanted with hepatocytes from a mouse injected with r *** 156 d before, 6 out of 6 mice showed long-term survival, weight gain and FAH positive clusters without need for NTBC treatment. In contrast only 1 out 5 mice, who received hepatocytes from r *** treated mice, survived and showed few and smaller FAH positive clusters. These results demonstrate that homologous recombinationmediated Fah gene transfer corrects the phenotype in a mouse model of human tyrosinaemia type 1(Fah-/-mice) and

关键词： Gene therapy AAV8 Liver based metabolic disease Targeted integration ROSA26 Paediatric liver disease

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

风景画篱

引用

设计 2012年第4期25卷 96-101页

作者： Leeble Paul ott Heri&Salli

在人们的印象中，篱笆是草原上长长的一条线，是农场上矮矮的一排桩，但篱笆也可以是一面墙，甚至是一片屋顶。来自奥地利的两位设计师将一座游泳池用篱笆包裹起来，仅为其留下一道面朝水面的出口，同时包裹进来的，还有周围的湖光，山色。

关键词：风景画游泳池设计师奥地利包裹排桩屋顶墙

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

四大极限体验

引用

海外英语 2013年第8期 37-37,64页

作者： Danielle ott

想体验心跳加速、热血沸腾的感觉吗？不妨尝试下面几项极限体验，再不疯狂就老了哦!

关键词：英语教学教学方法阅读教学课外阅读

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

寻找完美伴侣

引用

海外英语 2013年第6期 32-32,64页

作者： Danielle ott

忙碌的工作、琐碎的生活、狭小的人际圈，这些似乎都成了寻找人生伴侣的绊脚石，于是乎，各大相亲网站应运而生，为现代人提供了一种全新的找伴侣的方式。别以为这些网站都是大同小异，其实里面学问大着呢，每个网站针对的人群不同，注... 详细信息

忙碌的工作、琐碎的生活、狭小的人际圈，这些似乎都成了寻找人生伴侣的绊脚石，于是乎，各大相亲网站应运而生，为现代人提供了一种全新的找伴侣的方式。别以为这些网站都是大同小异，其实里面学问大着呢，每个网站针对的人群不同，注册和约会方式也不同。阅读本文，了解现代人的新型相亲方式。

关键词：伴侣约会方式现代人网站相亲生活人生学问

来源：

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

居兴农业学校奥地利居兴

引用

世界建筑导报 2017年第4期32卷 86-90页

作者： paul ott(摄影)

该项目是对整个建筑综合体的全新改建.因为对现有建筑进行改造是一项大工程，但无法提供按当代需求管理学校所需的设施，所以保留和改造部分现有建筑综合体的另一项方案被否决。此外，设计过程中还发现根据复合体的实际规模的比例来看... 详细信息

该项目是对整个建筑综合体的全新改建.因为对现有建筑进行改造是一项大工程，但无法提供按当代需求管理学校所需的设施，所以保留和改造部分现有建筑综合体的另一项方案被否决。此外，设计过程中还发现根据复合体的实际规模的比例来看，整合现有综合体的设想实际上几乎无法实现。

关键词：农业学校奥地利建筑综合体需求管理设计过程复合体改造工程

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

An ultra-narrow linewidth solution-processed organic laser

引用

Light(Science & Applications) 2016年第1期5卷 660-664页

作者： Oussama Mhibik Sebastien Forget Dan ott George Venus Ivan Divliansky Leonid Glebov Sebastien Chénais UniversitéParis 13 Sorbonne Paris CitéLaboratoire de Physique des LasersF-93430 VilletaneuseFrance CNRS UMR 7538LPLF-93430 VilletaneuseFrance CREOL College of Optics and PhotonicsUniversity of Central FloridaP.O.Box 162700OrlandoFL 32816-2700USA

Optically pumped lasers based on solution-processed thin-film gain media have recently emerged as low-cost,broadly tunable,and versatile active photonics components that can fit any substrate and are useful for,e.g.,chemo-or biosensing or visible *** single-mode operation has been demonstrated in various resonator architectures with a large variety of gain media-including dye-doped polymers,organic semiconductors,and,more recently,hybrid perovskites-the reported linewidths are typically on the order of a fraction of a nanometer or broader,i.e.,the coherence lengths are no longer than a few millimeters,which does not enable high-resolution spectroscopy or coherent *** linewidth is fundamentally constrained by the short photon cavity lifetime in the standard resonator *** demonstrate here a novel structure for an organic thin-film solid-state laser that is based on a vertical external cavity,wherein a holographic volume Bragg grating ensures both spectral selection and output coupling in an otherwise very compact(,cm3)*** short-pulse(0.4 ns)pumping,Fourier-transform-limited laser pulses are obtained,with a full width at half-maximum linewidth of 900 MHz(1.25 pm).Using 20-ns-long pump pulses,the linewidth can be further reduced to 200 MHz(0.26 pm),which is four times above the Fourier limit and corresponds to an unprecedented coherence length of *** concept is potentially transferrable to any type of thin-film laser and can be ultimately made tunable;it also represents a very compact alternative to bulky grating systems in dye lasers.

关键词： narrow linewidth organic lasers VECSEL volume Bragg grating

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

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：