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Intelligent and connected vehicles： Current status and future perspectives

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Science China(Technological Sciences) 2018年第10期61卷 1446-1471页

作者： YANG DianGe JIANG Kun ZHAO Ding YU ChunLei CAO Zhong xie shichao XIAO ZhongYang JIAO XinYu WANG SiJia ZHANG Kai State Key Laboratory of Automotive Safety and Energy Department of Automotive Engineering Collaborative Innovation Center of Intelligent New Energy Vehicle Tsinghua University Beijing 100084 China University of Michigan Transportation Research Institute Ann Arbor MI 48109 USA

Intelligent connected vehicles(ICVs) are believed to change people's life in the near future by making the transportation safer,cleaner and more comfortable. Although many prototypes of ICVs have been developed to prove the concept of autonomous driving and the feasibility of improving traffic efficiency, there still exists a significant gap before achieving mass production of high-level ICVs. The objective of this study is to present an overview of both the state of the art and future perspectives of key technologies that are needed for future ICVs. It is a challenging task to review all related works and predict their future perspectives, especially for such a complex and interdisciplinary area of research. This article is organized to overview the ICV key technologies by answering three questions: what are the milestones in the history of ICVs; what are the electronic components needed for building an ICV platform; and what are the essential algorithms to enable intelligent driving? To answer the first question, the article has reviewed the history and the development milestones of ICVs. For the second question, the recent technology advances in electrical/electronic architecture, sensors, and actuators are presented. For the third question, the article focuses on the algorithms in decision making, as the perception and control algorithm are covered in the development of sensors and actuators. To achieve correct decision-making, there exist two different approaches: the principle-based approach and data-driven approach. The advantages and limitations of both approaches are explained and analyzed. Currently automotive engineers are concerned more with the vehicle platform technology, whereas the academic researchers prefer to focus on theoretical algorithms. However, only by incorporating elements from both worlds can we accelerate the production of high-level ICVs.

关键词： intelligent connected vehicle (ICV) autonomous driving artificial intelligence advanced driver assistance systems(ADAS) electrical/electronic architecture (EEA) environmental perception decision-making ICV computation platform

High dietary lipid level promotes low salinity adaptation in the marine euryhaline crab(Scylla paramamosain)

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Animal Nutrition 2023年第1期12卷 297-307页

作者： Jiaxiang Luo Chen Ren Tingting Zhu Chen Guo shichao xie Yingying Zhang Zheng Yang Wenli Zhao Xiangsheng Zhang Jingjing Lu Lefei Jiao Qicun Zhou Douglas R.Tocher Min Jin Laboratory of Fish and Shellfish Nutrition School of Marine SciencesNingbo UniversityNingbo 315211China Guangdong Provincial Key Laboratory of Marine Biotechnology Institute of Marine SciencesShantou UniversityShantou 515063China

The physiological processes involved in adaptation to osmotic pressure in euryhaline crustaceans are highly energy demanding,but the effects of dietary lipids(fat)on low salinity adaptations have not been well *** the present study,a total of 120 mud crabs(Scylla paramamosain,BW=17.87±1.49 g)were fed control and high-fat(HF)diets,at both medium salinity(23‰)and low salinity(4‰)for 6 wk,and each treatment had 3 replicates with each replicate containing 10 *** results indicated that a HF diet significantly mitigated the reduction in survival rate,percent weight gain and feed efficiency induced by low salinity(P<0.05).Low salinity lowered lipogenesis and activated lipolysis resulting in lipid depletion in the hepatopancreas of mud crabs(P<0.05).Thus,HF diets enhanced the process of lipolysis to supply more *** the gills,low salinity and the HF diet increased the levels of mitochondrial biogenesis markers,the activity of mitochondrial complexes,and the expression levels of genes related to energy metabolism(P<0.05).Consequently,the positive effects of the HF diet on energy metabolism in mud crabs at low salinity promoted osmotic pressure ***,significantly higher haemolymph osmotic pressure and inorganic ion content,as well as higher osmotic pressure regulatory enzyme activity in gills,and gene and protein expression levels of NaK-ATPase were observed in crabs fed the HF diet at low salinity(P<0.05).In summary,high dietary lipid levels improved energy provision to facilitate mitochondrial biogenesis,which increased ATP provision for osmotic pressure regulation of mud *** study also illustrates the importance of dietary lipid nutrition supplementation for low salinity adaptations in mud crabs.

关键词： Osmotic pressure regulation Mitochondrial energy metabolism Lipid metabolism

A Unifiedspatio-temporal Descrption Model of Environment for Intelligent Vehicles

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A Unifiedspatio-temporal Descrption Model of Environment for...

不同接收机北斗天线相位中心改正模型定轨性能分析

2019中国汽车工程学会年会

作者： Wang Sijia Jiang Kun xie shichao Zhong Yuanxin Yang Diange State Key Laboratory of Automotive Safety and Energy School of Vehicle and Mobility Tsinghua University Department of Mechanical Engineering University of Michigan

Beneficial from fusion of various external sensors such as LiDAR and camera,intelligent vehicles are able to be informed of their surroundings with details in real *** characteristics of each type of sensors determine its specificity in raw data,leading to inconfonnity of content,precision,range and timing,which eventually increases the complexity of environment descriptions and effective information extraction for further *** order to efficiently describe the environment,as well as remain the diversity of necessary information,we propose a unified description model independent of specific sensors for intelligent vehicle environment perception,containing 3 D positions,semantics and *** spatio-temporal relationship between different types of collected data are established to express all the elements in the same *** for practical implementation,we basically take advantages of LiDAR point cloud and color images to acquire the positions and semantics of the environment ***-based semantic segmentation based on convolutional neural netw-orks(CNN) provides rich semantics for the model,which could also be enhanced with the fusion of LiDAR point *** validate the effectiveness of our proposed model on the KITTI dataset and our own collected data and exhibit qualitative results.

关键词： spatio-temporal description environment perception sensor fusion semantic segmentation intelligent vehicle

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大地测量与地球动力学 2023年第9期43卷 887-892,903页

作者：田静王乐解世超黄观文长安大学地质工程与测绘学院西安市710054

为建立北斗精密定轨接收机天线相位中心改正(phase center correction, PCC)模型最优化策略,首先对GPS的IGb R3和IGb 14标定值进行比较,两组模型值差异较小,表明在未提供北斗接收机天线IGb 14标定值的情况下采用IGb R3标定值代替具有可... 详细信息

为建立北斗精密定轨接收机天线相位中心改正(phase center correction, PCC)模型最优化策略,首先对GPS的IGb R3和IGb 14标定值进行比较,两组模型值差异较小,表明在未提供北斗接收机天线IGb 14标定值的情况下采用IGb R3标定值代替具有可行性。进一步,设计PCC赋0、GPS L1/L2频点改正值代替、IGb R3标定值代替3组接收机PCC模型分析其对北斗精密定轨的影响。结果表明,接收机天线相位中心偏差(phas center offset, PCO)对精密定轨影响较大,对于北斗三号精密轨道,采用IGb R3模型的结果最优,其平均轨道拟合精度为3.4 cm;使用GPS的L1/L2代替值次之。最新框架下北斗接收机精确PCC模型公布前,推荐采用IGb R3值用于北斗三号精密轨道解算。

关键词：北斗接收机天线相位中心改正精密轨道框架

基于端到端学习机制的高速公路行驶轨迹曲率预测

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汽车工程 2018年第12期40卷 1494-1499页

作者：焦新宇杨殿阁江昆曹重谢诗超王思佳汽车安全与节能国家重点实验室智能新能源汽车协同创新中心清华大学汽车工程系北京100084

本文中基于端到端学习机制进行了高速公路场景下的车辆行驶轨迹预测。首先,为量化表达行驶轨迹,并对预测结果进行合理评价,建立了行车轨迹曲率预测模型与评价体系。然后,针对端到端的行驶轨迹曲率预测训练集中驾驶员行为决策的不确定性... 详细信息

本文中基于端到端学习机制进行了高速公路场景下的车辆行驶轨迹预测。首先,为量化表达行驶轨迹,并对预测结果进行合理评价,建立了行车轨迹曲率预测模型与评价体系。然后,针对端到端的行驶轨迹曲率预测训练集中驾驶员行为决策的不确定性导致性能不佳的问题,采用场景切分和特征预提取的方法进行优化和实车试验验证。结果表明,该方法提高了高速公路行驶轨迹预测的准确性和可靠性。

关键词：智能汽车端到端学习机制轨迹预测场景切分特征预提取

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连铸钢包盖结构改进及故障分析

南钢科技与管理 2020年第3期 25-27,52页

作者：袁玉康谢士超第一炼钢厂

连铸钢包盖是炼钢生产过程中辅助设备,目前使用有炼钢全程加盖和连铸自行加盖两种方式。本文结合生产实践,针对连铸自行加盖方式,分析了钢包盖对安全生产的影响因素,通过优化钢包盖结构,提升钢包盖机械手稳定性,大幅度减少了钢包盖对生... 详细信息

连铸钢包盖是炼钢生产过程中辅助设备,目前使用有炼钢全程加盖和连铸自行加盖两种方式。本文结合生产实践,针对连铸自行加盖方式,分析了钢包盖对安全生产的影响因素,通过优化钢包盖结构,提升钢包盖机械手稳定性,大幅度减少了钢包盖对生产、安全、质量的影响。

关键词：连铸钢包盖机械手

维普期刊数据库评论

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巧克力油脂相容性研究进展

中国油脂 2013年第8期38卷 38-43页

作者：沈海燕谢仕潮张虹胡鹏王兴国江南大学食品学院江苏无锡214122 丰益(上海)生物技术研发中心有限公司上海200137

通过比较和分析可可脂、类可可脂、月桂酸型代可可脂、非月桂酸型代可可脂、乳脂、坚果油等巧克力用油的二元、三元等固相图,并结合其脂肪酸组成、甘三酯组成、晶体类型、结晶特性等,总结了巧克力用油的相容性,并探讨了可能引起相容性... 详细信息

通过比较和分析可可脂、类可可脂、月桂酸型代可可脂、非月桂酸型代可可脂、乳脂、坚果油等巧克力用油的二元、三元等固相图,并结合其脂肪酸组成、甘三酯组成、晶体类型、结晶特性等,总结了巧克力用油的相容性,并探讨了可能引起相容性差异的原因,对巧克力用油相容性的评判给出了指导性建议。

关键词：巧克力可可脂乳脂类可可脂月桂酸型代可可脂非月桂酸型代可可脂坚果油

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北斗三号实时轨道改正数生成及服务性能分析

测绘地理信息 2020年第4期45卷 51-56页

作者：王乐解世超黄观文燕兴元邵搏长安大学地质工程与测绘学院陕西西安710054 中国电子科技集团公司第二十研究所陕西西安710068

随着用户对高精度实时定位需求的提高,实时轨道已逐渐成为北斗系统应用服务的关键。为对北斗三号卫星实时轨道改正数生成和服务性能进行系统研究和分析,进而为系统服务和用户应用提供参考和依据,设计了实时精密定轨策略,提出了实时轨道... 详细信息

随着用户对高精度实时定位需求的提高,实时轨道已逐渐成为北斗系统应用服务的关键。为对北斗三号卫星实时轨道改正数生成和服务性能进行系统研究和分析,进而为系统服务和用户应用提供参考和依据,设计了实时精密定轨策略,提出了实时轨道改正数生成和恢复算法,统计分析了状态空间表示(state space representation,SSR)信息在有效期内的精度损失,研究讨论了SSR信息的有效服务时长。实验结果表明,北斗三号卫星实时轨道平均精度约为112 mm,生成的30 s更新频率的SSR信息在一个有效期的最大精度损失约为11 mm,在有效期之后25个历元(12.5 min)的平均精度损失超过0.5 m,不再具有使用价值。

关键词：北斗三号实时轨道改正数精度损失

反粉丝、非粉丝与复杂情感：三波粉丝研究浪潮后的受众研究复兴——对乔纳森·格雷教授的学术访谈

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国际新闻界 2024年第2期46卷 161-176页

作者：张世超尹一伊谢卓潇中国人民大学新闻学院北京师范大学艺术与传媒学院南京大学新闻传播学院

美国威斯康星麦迪逊分校传播艺术系的乔纳森·格雷教授深耕媒介与受众研究二十余年，尤其关注粉丝研究、电视受众研究等议题。乔纳森始终保持批判与反思的立场，另辟蹊径地关注到反粉丝、非粉丝以及对特定媒介产品抱有负面情感的受众，... 详细信息

美国威斯康星麦迪逊分校传播艺术系的乔纳森·格雷教授深耕媒介与受众研究二十余年，尤其关注粉丝研究、电视受众研究等议题。乔纳森始终保持批判与反思的立场，另辟蹊径地关注到反粉丝、非粉丝以及对特定媒介产品抱有负面情感的受众，并指出受众研究在当下新媒介环境中所面临的机遇与挑战。此次访谈从乔纳森的研究历程开始，回顾粉丝研究的三波浪潮与领域内的最新研究进展，随后谈及他的新书《厌趣相投：媒介、受众和品味动态》对一类特殊受众——即明确表达“不喜欢”的受众的研究。最后，我们回到《复兴受众研究》，讨论广泛意义上的受众研究的发展，反思受众理论式微背后的问题，同时展望新媒介环境下的受众研究。

关键词：乔纳森·格雷粉丝研究受众研究负面情感文化研究