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3D Road Network Modeling and Road Structure Recognition in Internet of Vehicles

Computer Modeling in Engineering & Sciences 2024年第2期138卷 1365-1384页

作者： Dun cao jia Ru jian Qin Amr Tolba Jin Wang Min Zhu College of Computer and Communication Engineering Changsha University of Science and TechnologyChangsha410114China Department of Computer Science Community CollegeKing Saud UniversityRiyadh11437Saudi Arabia College of Information Science and Technology Zhejiang Shuren UniversityHangzhou310015China

Internet of Vehicles (IoV) is a new system that enables individual vehicles to connect with nearby vehicles,people, transportation infrastructure, and networks, thereby realizing amore intelligent and efficient transportationsystem. The movement of vehicles and the three-dimensional (3D) nature of the road network cause the topologicalstructure of IoV to have the high space and time *** modeling and structure recognition for 3Droads can benefit the description of topological changes for IoV. This paper proposes a 3Dgeneral roadmodel basedon discrete points of roads obtained from GIS. First, the constraints imposed by 3D roads on moving vehicles areanalyzed. Then the effects of road curvature radius (Ra), longitudinal slope (Slo), and length (Len) on speed andacceleration are studied. Finally, a general 3D road network model based on road section features is *** paper also presents intersection and road section recognition methods based on the structural features ofthe 3D road network model and the road features. Real GIS data from a specific region of Beijing is adopted tocreate the simulation scenario, and the simulation results validate the general 3D road network model and therecognitionmethod. Therefore, thiswork makes contributions to the field of intelligent transportation by providinga comprehensive approach tomodeling the 3Droad network and its topological changes in achieving efficient trafficflowand improved road safety.

关键词： Internet of vehicles road networks 3D road model structure recognition GIS

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Surface-induced Microstructure and Performance Changes in P3HT Ultrathin Films

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Chinese Journal of Polymer Science 2024年第6期42卷 805-814页

作者： Hong-Tao Shan jia-Xin He Bing-Yan Zhu Xue-Ting cao Ying-Ying Yan jian-Jun Zhou Hong Huo Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing100875China

In this work,poly(3-hexylthiophene)(P3HT)ultrathin films(P3HT-T)were prepared by spin-coating a dilute P3HT solution(in a toluene:o-dichlorobenzene(Tol:ODCB)blend with a volume ratio of 80:20)with ultrasonication and the addition of the nucleating agent bicycle[2.2.1]heptane-2,3-dicarboxylic acid disodium salt(HPN-68L)on glass,Si wafers and indium tin oxide(ITO)*** electrical and mechanical properties of the P3HT-T ultrathin films were investigated,and it was found that the conductivity and crack onset strain(COS)were simultaneously improved in comparison with those of the corresponding pristine P3HT film(P3HT-0,without ultrasonication and nucleating agent)on the same substrate,regardless of what substrate was ***,the conductivity of P3HT-T ultrathin films on different substrates was similar(varying from 3.7 S·cm^(-1)to 4.4 S·cm^(-1)),yet the COS increased from 97%to 138%by varying the substrate from a Si wafer to *** grazing-incidence wide-angle X-ray diffraction(GIXRD),UV-visible(UV-Vis)spectroscopy and atomic force microscopy(AFM),we found that the solid order and crystallinity of the P3HT-T ultrathin film on the Si wafer are highest,followed by those on glass,and much lower on ***,the surface energy and roughness of three substrates were investigated,and it was found that the polar component of the surface energyγp plays a critical role in determining the crystalline microstructures of P3HT ultrathin films on different *** work indicates that the P3HT ultrathin film can obviously improve the stretchability and simultaneously retain similar electrical performance when a suitable substrate is *** findings offer a new direction for research on stretchable CP ultrathin films to facilitate future practical applications.

关键词： P3HT ultrathin film Substrate Crystalline microstructures Polar component of the surface energy Electrical and stretchable performances

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南瓜属植物再生体系的建立及其应用

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植物生理学通讯 2007年第3期43卷 599-604页

作者：张亚锋曹家树武涛浙江大学蔬菜研究所杭州310029

对南瓜属植物再生体系的研究及其应用作了介绍,并对存在问题和改进措施进行了分析讨论。

关键词：南瓜属再生体系体细胞胚途径器官发生途径遗传转化

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RNAi沉默BcMF3基因对菜薹花粉发育的影响

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园艺学报 2007年第1期34卷 125-130页

作者：刘乐承向珣曹家树浙江大学蔬菜研究所

根据从白菜(Brassica *** ***)核雄性不育两用系中分离到编码果胶甲酯酶(PME)的雄性不育相关基因BcMF3cDNA序列设计引物,从白菜花蕾cDNA中扩增出一短一长两个片段,分别反向和正向连接至双元载体pBI12l中,得到了RNAi(RNA interference)... 详细信息

根据从白菜(Brassica *** ***)核雄性不育两用系中分离到编码果胶甲酯酶(PME)的雄性不育相关基因BcMF3cDNA序列设计引物,从白菜花蕾cDNA中扩增出一短一长两个片段,分别反向和正向连接至双元载体pBI12l中,得到了RNAi(RNA interference)植物表达载体pBI-B3R,并导入农杆菌LBA4404菌株中;通过组织培养途径转化菜薹(*** *** ***),分子检测证明BcMF3片段单拷贝整合到转基因菜薹的基因组中;50%转基因菜薹植株的花粉畸形,花粉离体萌发率为32.3%,出现畸形花粉植株的花药PME活性降低了13.5%。这一结果从转基因植株后代的表型和酶活性上证明,采用RNAi技术沉默BcMF3基因,可能通过影响PME活性而引起转基因菜薹植株部分花粉的败育,从而证明BcMF3基因在普通白菜和菜薹等植物的花粉发育中起着重要作用。

关键词：白菜菜薹花粉

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白菜雄性不育相关基因BcMF4的反义RNA验证

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湖南农业大学学报（自然科学版） 2007年第4期33卷 412-415,418页

作者：刘乐承曹家树浙江大学蔬菜研究所

根据普通白菜(Brassica campestris *** ***)雄性不育相关基因BcMF4的cDNA序列设计特异引物,从普通白菜花蕾cDNA中扩增出607 bp的片断,然后将该片段连接至双元载体pBI12l中,得到反义RNA植物表达载体并导入农杆菌LBA4404菌株中;通过组织... 详细信息

根据普通白菜(Brassica campestris *** ***)雄性不育相关基因BcMF4的cDNA序列设计特异引物,从普通白菜花蕾cDNA中扩增出607 bp的片断,然后将该片段连接至双元载体pBI12l中,得到反义RNA植物表达载体并导入农杆菌LBA4404菌株中;通过组织培养途径转化菜心(*** *** ***),得到了12株转基因植株,其中5株的43.7%的花粉为缩小空瘪畸形,29.6%的花粉缺乏生活力,而且其花粉离体萌发率降低至24.7%.结果表明,反义RNA技术沉默BcMF4基因导致了菜心转基因植株的部分花粉发育不良,BcMF4基因在普通白菜和菜心等花粉发育中起着重要作用.

关键词：普通白菜菜心雄性不育反义RNA 花粉

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卡那霉素对转基因菜心T1代种子的筛选鉴定研究

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广东农业科学 2009年第7期36卷 63-64页

作者：宋江华曹家树安徽农业大学园艺学院安徽合肥230036 浙江大学蔬菜研究所浙江杭州310029

采用附加不同浓度卡那霉素(Kan)的1/2MS培养基对转基因油青菜心T1代种子进行培养,快速鉴定转基因菜心T1代种子对Kan的敏感性,结果表明:转基因菜心幼苗的白化率随着Kan浓度的升高而增大,其中以Kan附加浓度为60 mg/L时较适合于菜心转化植... 详细信息

采用附加不同浓度卡那霉素(Kan)的1/2MS培养基对转基因油青菜心T1代种子进行培养,快速鉴定转基因菜心T1代种子对Kan的敏感性,结果表明:转基因菜心幼苗的白化率随着Kan浓度的升高而增大,其中以Kan附加浓度为60 mg/L时较适合于菜心转化植株后代的选择鉴定。

关键词：菜心卡那霉素转基因种子

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Diverse foraging strategies of breeding Swinhoe's Storm-petrel in the productive marginal sea of the Northwest Pacific

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Avian Research 2024年第1期15卷 27-34页

作者： Yachang Cheng Lei Zhu Lin Xue Shisheng Ma Nan jia Shaoping Zang Zhihai cao Jing Yuan Yang Liu State Key Laboratory of Biocontrol School of EcologySun Yat-sen UniversityShenzhen 518107China Guangxi Mangrove Research Center Guangxi Marine Academy of SciencesNanning 530021China Qingdao Bird Watch Society Qingdao 266121China jiangsu Provincial Environmental Monitoring Center Nanjing 210019China Marine Science and Engineering Qingdao Agricultural UniversityQingdao 266109China Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering Fudan UniversityShanghai 200433China Qingdao Marine Management and Support Centre Qingdao 266555China Management Committee of Lingshan Island Provincial Nature Reserve Qingdao 266428China

Understanding the foraging behavior is essential for investigating seabird ecology and conservation,as well as monitoring the well-being of the marine *** seabirds adopt diverse foraging strategies to maximize energy gains and cope with the intensified challenges of parenting and *** tradeoff may stem from the heterogeneity of food resources and the constraints of central place ***,abundant marine productivity could alleviate the energy limitation for seabirds,resulting in a consistent foraging ***,we investigated the foraging strategy during the breeding season of a cryptic small-sized seabird,Swinhoe’s Storm-petrel(Hydrobates monorhis),in the Yellow Sea,a productive marginal sea of the Northwest *** GPS tracking,we evaluated habitat preference,quantified the foraging strategy,and tested if environmental conditions and individual traits influence foraging *** found that Swinhoe’s Storm-petrels preferred nearshore areas with shallow water and engaged in primarily short foraging *** southeastward and southwestward strategies emerged when combining trip metrics,including foraging direction,duration,and maximum *** bathymetry,proximity to the coastline,and sea surface temperature differed in two foraging *** strategies exhibited flexibility between individuals,potentially explained by wing morphology,in which longer-winged birds are more likely to embark on longer-distance foraging *** findings highlight the impact of environmental factors and individual traits on seabirds’foraging decisions in productive marginal sea *** study also provides valuable insights into the foraging ecology of this Asian endemic storm-petrel.

关键词： Behavioral strategy Biologging Central place foraging Marine primary productivity Seabird Sea surface temperature

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白菜雄性不育相关基因BcMF3功能的反义RNA验证

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浙江大学学报（农业与生命科学版） 2006年第5期32卷 473-478页

作者：刘乐承余小林叶纨芝向珣曹家树浙江大学蔬菜研究所

为了研究白菜等十字花科植物花粉发育及雄性不育发生的机理,根据编码果胶甲酯酶的白菜雄性不育相关基因BcMF3的cDNA序列设计特异引物,从普通白菜(Brassica ***,***)花蕾cDNA中扩增出458 bp的片断,构建BcMF3的反义RNA植物表达栽体,然后... 详细信息

为了研究白菜等十字花科植物花粉发育及雄性不育发生的机理,根据编码果胶甲酯酶的白菜雄性不育相关基因BcMF3的cDNA序列设计特异引物,从普通白菜(Brassica ***,***)花蕾cDNA中扩增出458 bp的片断,构建BcMF3的反义RNA植物表达栽体,然后转化菜心(***).研究发现,31.3%菜心转基因植株花粉表现出畸形,而且只有部分花粉具有活力,花粉离体萌发率降低为31.6%,其花药果胶甲酯酶活性降低了12.8%.上述结果表明BcMF3基因与普通白菜和菜心等白菜植物的花粉发育密切相关.

关键词：普通白菜 Brassica campestris Brassica rapa BcMF3 菜心花粉果胶甲酯酶

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Treatment of hemolymphangioma by robotic surgery: A case report

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World Journal of Gastrointestinal Surgery 2024年第2期16卷 596-600页

作者： Tian-Ning Li Yan-Hong Liu jia Zhao Hong Mu Lei cao Department of Clinical Lab Tianjin First Central HospitalTianjin 300000China Nankai University Tianjin Union Medical CenterTianjin 300000China Tianjin Medical University Tianjin First Center HospitalTianjin 300000China

BACKGROUND Hemolymphangioma of the jejunum is rare and lacks clinical specificity,and can manifest as gastrointestinal bleeding,abdominal pain,and intestinal *** tomography,magnetic resonance imaging,and other examinations show certain characteristics of the disease,but lack *** capsule endoscopy and enteroscopy make up for this deficiency,the diagnosis also still re-quires *** SUMMARY A male patient was admitted to the hospital due to abdominal distension and abdominal pain,but a specific diagnosis by computed tomography examination was not *** resection of the small intestine was performed by robotic surgery,and postoperative pathological biopsy confirmed the diagnosis of *** recurrence in the follow-up examination was *** Robotic surgery is an effective way to treat hemolymphangioma through minima-lly invasive techniques under the concept of rapid rehabilitation.

关键词： Hemolymphangioma Enteroscopy Robotic surgery Rehabilitation Case report

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Diversification of interfaces triggered hydrogen storage properties enhancement

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Rare Metals 2024年第5期43卷 2324-2330页

作者： jia-Xin Zhang Xin Ding Rui-Run Chen Xiang-Feng Ma Wen-Chao cao Yong Zhang Jing-Jie Guo National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of TechnologyHarbin 150001China

Dual effects of grain refinement and alloying are achieved and the mechanism of"diverse interfaces reinforcement"for hydrogen storage Mg alloys is first *** interface reinforced Mg-Y-Zn-Al alloy for hydrogen storage is *** work figures out that the adventurous Al-rich phase exhibits an ordered face-centered cubic(FCC)structure with composition of(31±2)at%Y-(28±1)at%Zn-(41±3)at%Al,i.e.,Y_(3)Zn_(3)Al_(4),and an incoherent interface between Y3Zn3Al4phase and Mg substrate is observed.

关键词： hydrogen alloying alloy

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