检索结果-南通市图书馆

On the performance of shared autonomous bicycles:A simulation study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Transportation Research 2022年第1期2卷 116-151页

作者： Naroa Coretti Sanchez Inigo Martinez Luis Alonso Pastor kent larson MIT Media Lab CambridgeMAUSA University of Navarra San SebastianSpain

As society faces global challenges such as population growth and climate change,rethinking cities is now more imperative than *** design of cities can not be abstracted from the design of their mobility ***,efficient solutions must be found to transport people and goods throughout the city efficiently and *** autonomous bicycle-sharing system would combine the most relevant benefits of vehicle-sharing,autonomy,and micro-mobility,increasing the efficiency and convenience of bicycle-sharing systems and incentivizing more people to bike and enjoy their cities in an environmentally friendly *** to the novelty of introducing autonomous driving technology into bicycle-sharing systems and their inherent complexity,there is a need to quantify the potential impact of autonomy on fleet performance and user *** paper presents the results of an agent-based simulation that provides an in-depth understanding of the fleet behavior of autonomous bicycle-sharing systems in realistic scenarios,including a rebalancing system based on demand *** addition,this work describes the impact of different parameters on system efficiency and service ***,it quantifies the extent to which an autonomous system would outperform current station-based and dockless bicycle-sharing *** obtained results show that with a fleet size three and a half times smaller than a station-based system and eight times smaller than a dockless system,an autonomous system can improve overall performance and user experience even with no rebalancing.

关键词： Future mobility Bicycle-sharing systems Autonomous vehicles Micro-mobility Agent-based simulation Multi-agent systems

走向城市科学新流程--基于新兴计算技术的增强城市决策与新型系统整合

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

建筑学报 2018年第9期 114-120页

作者：张砚肯特·蓝森麻省理工学院媒体实验室(美国)

针对传统城市规划、管理及更新迭代方式的不足,力求提高城市的活力与创造力,美国麻省理工学院媒体实验室的城市科学研究组提出未来城市的发展目标—走向自主创新社区,及达到该目标的城市科学的5方面新流程:洞察、转型、预测、共识、治... 详细信息

针对传统城市规划、管理及更新迭代方式的不足,力求提高城市的活力与创造力,美国麻省理工学院媒体实验室的城市科学研究组提出未来城市的发展目标—走向自主创新社区,及达到该目标的城市科学的5方面新流程:洞察、转型、预测、共识、治理。文章以创新的研究项目及其世界范围的运用来阐述该新流程的各环节多种新兴技术运用、新兴城市系统整合,及其对未来城市的积极意义。

关键词：城市科学城市决策计算性设计自主创新社区人工智能区域经济

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

有机硅热接口材料在汽车电子器件中的应用

电子产品世界 2007年第F8期14卷 45-46,48页

作者： Martin Stephan kent larson 道康宁公司电子全球应用工程中心

汽车电子器件面临着越来越多传热问题的考验，因为发动机舱越来越小，而容纳的部件数目却日益增多，发动机功率输出比以往更高，这样，便造成前舱空气温度升高。同时，电子器件本身的功能和功率也在不断增加，产生的热量随之增多。而由... 详细信息

汽车电子器件面临着越来越多传热问题的考验，因为发动机舱越来越小，而容纳的部件数目却日益增多，发动机功率输出比以往更高，这样，便造成前舱空气温度升高。同时，电子器件本身的功能和功率也在不断增加，产生的热量随之增多。而由于热量的散失是性能和可靠性的决定因素，因此，人们将重点放在了这些电子器件中的热接口材料（TIM）上。

关键词：汽车电子器件接口材料有机硅应用发动机舱功率输出温度升高可靠性

CityScope—可触交互界面、增强现实以及人工智能于城市决策平台之运用

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

时代建筑 2018年第1期61卷 44-49页

作者：张砚肯特.蓝森美国麻省理工学院

城市是我们的未来。城市的发展趋势不仅体现在其规模越来越大,其复杂性和变化性也在日益增大。目前城市决策的公众参与过程是低效的、缺乏信息沟通的,且往往发生在项目后期。更重要的是,很多设计决定是经验性的、主观的,且往往不建立在... 详细信息

城市是我们的未来。城市的发展趋势不仅体现在其规模越来越大,其复杂性和变化性也在日益增大。目前城市决策的公众参与过程是低效的、缺乏信息沟通的,且往往发生在项目后期。更重要的是,很多设计决定是经验性的、主观的,且往往不建立在量化的数据和城市性能上。为了改善这样的现状,也为了让专家和非专家都能参与到易用的、协作的、循证的城市决策过程中来,CityScope项目在美国麻省理工学院媒体实验室的城市科学研究组里应运而生。CityScope是一个动态的、证据辅佐的城市决策辅助系统。它的主要功能特点包括了:1)直觉的可触交互界面加上增强现实可视化系统以提高决策过程的可参与性;2)通过多代理模拟和机器学习技术实现的城市多项性能的实时反馈;3)可以提供优化建议的人工智能助手,以帮助使用者更有效地定义、达成他们关于城市的愿景。文章将全面地论述CityScope系统的目标、构建、贡献,以及未来潜力。

关键词：城市决策自下而上人工智能机器学习可触交互界面增强现实多代理模拟

Diffusion-weighted magnetic resonance imaging to predict response of hepatocellular carcinoma to chemoembolization

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

World Journal of Gastroenterology 2010年第25期16卷 3161-3167页

作者： Johnathan C Chung Neel K Naik Robert J Lewandowski Mary F Mulcahy Laura M Kulik kent T Sato Robert K Ryu Riad Salem Andrew C larson Reed A Omary Department of Radiology North-western University Chicago IL 60611 United States Clinical Sciences Research Division Gastrointestinal Oncology Program Robert H. Lurie Comprehensive Cancer Center Chicago IL 60611 United StatesMary F Mulcahy Department of Medicine Division of Hema-tology and Oncology Northwestern Memorial Hospital Chi-cago IL 60611 United States Department of Hepatology Northwestern Uni-versity Chicago IL 60611 United States Reed A Omary Department of Biomedi-cal Engineering Northwestern University Chicago IL 60611 United States

AIM: To investigate whether intra-procedural diffusion- weighted magnetic resonance imaging can predict response of hepatocellular carcinoma (HCC) during trans- catheter arterial chemoembolization (TACE). METHODS: Sixteen patients (15 male), aged 59 ±11 years (range: 42-81 years) underwent a total of 21 separate treatments for unresectable HCC in a hybrid magnetic resonance/interventional radiology suite. Ana- tomical imaging and diffusion-weighted imaging (b = 0, 500 s/mm2) were performed on a 1.5-T unit. Tumor enhancement and apparent diffusion coefficient (ADC, mm2/s) values were assessed immediately before and at 1 and 3 mo after TACE. We calculated the percent change (PC) in ADC values at all time points. We compared follow-up ADC values to baseline values using a paired t test (α = 0.05). RESULTS: The intra-procedural sensitivity, specificity, and positive and negative predictive values (%) for detecting a complete or partial 1-mo tumor response using ADC PC thresholds of ±5%, ±10%, and ±15% were 77, 67, 91, and 40; 54, 67, 88, and 25; and 46, 100, 100, and 30, respectively. There was no clear predictive value for the 3-mo follow-up. Compared to baseline, the immediate post-procedure and 1-mo mean ADC values both increased; the latter obtaining statistical significance (1.48 ± 0.29 mm2/s vs 1.65 ± 0.35 × 10-3 mm2/s, P 15% predicted 1-mo anatomical HCC response with the greatest accuracy, and can provide valuable feedback at the time of TACE.

关键词： Hepatocellular carcinoma Transcatheter arterial chemoembolization Diffusion-weighted imaging Apparent diffusion coefficient Functional imaging biomarker

Fit “n” Cool Kids: Effects of Peer-Modeling and Goal Setting on Physical Activity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Preventive Medicine 2018年第4期8卷 85-94页

作者： Jessyka N. larson Timothy A. Brusseau Maria M. Newton Stuart J. Fairclough Heidi Wengreen James C. Hannon Department of Health Kinesiology & Recreation University of Utah Salt Lake City UT USA Department of Sport & Physical Activity Edge Hill University Ormskirk UK Department of Nutrition Dietetics and Food Sciences Utah State University Logan UT USA College of Education Health and Human Services Kent State University Kent OH USA

Background: Decreasing the risk of overweight and obesity from an early age is imperative and efforts should focus on fostering children’s physical activity (PA). Within school-based interventions, there is insufficient evidence on the effectiveness of the use of character peer-modeling and goal setting to increase physical activity. Therefore, the purpose of this study was to examine the impact of a school-based intervention on PA and enjoyment of PA in grades 3 - 5 elementary school age children at two urban elementary schools. Methods: Participants were 95 students of 8 - 10 years old;activity monitors were used to assess physical activity. Daily physical activity and enjoyment was recorded at baseline, intervention, and at a 6-school-week follow-up. Results: PA significantly increased in the intervention school averaging 5549 steps at baseline, 5889 steps during the intervention, and 6515 during follow-up (p Conclusion: The Fit “n” Cool Kids intervention presents the potential of peer-modeling and goal setting for increasing PA at school. Continued interventions in schools may positively influence children’s healthy living patterns.

关键词： Health MVPA Physical Education School Health Youth