检索结果-南通市图书馆

Real-time comprehensive driving ability evaluation algorithm for intelligent assisted driving

Green energy and Intelligent Transportation 2023年第2期2卷 40-55页

作者： Fang Liu Feng Xue Wanru Wang Weixing Su Yang Liu Tianjin Key Laboratory of Autonomous Intelligence Technology and Systems Tiangong UniversityTianjin 300387China bbt-e-6 complete vehicle BMW Brilliance Automotive Ltd.Shenyang Liaoning 110098China

To meet the needs of the human-machine co-driving decision problem in the intelligent assisted driving system for real-time comprehensive driving ability evaluation of drivers,this paper proposes a real-time comprehensive driving ability evaluation method that integrates driving skill,driving state,and driving ***,by analyzing the driving experiment data obtained based on the intelligent driving simulation platform(the experiment can effectively distinguish the driver's driving skills and avoid the interference of driving style),the feature values that significantly represent driving skills and driving state are selected,and the time correlation between driving state and driving skills is pointed ***,the concept of relativity in comprehensive driving ability evaluation is further *** this concept,the natural driving trajectory dataset-HighD is used to establish the distribution map of feature values of the human driver group as the evaluation benchmark to realize the relative evaluation of driving skill and driving ***,HighD is used to establish a distribution map of human driver style feature values as an evaluation benchmark to achieve relative driving style ***,a comprehensive driving ability evaluation model with a“punishment”and“affirmation”mechanism is *** experimental comparative analysis shows that the evaluation algorithm proposed in this paper can take into account the driver's driving skill,driving state,and driving style in the real-time comprehensive driving ability evaluation,and draw differential evaluation conclusions based on the“punishment”and“affirmation”mechanism model to achieve a comprehensive and objective evaluation of the driver's driving *** can meet the needs of human-machine shared driving decisions for driver's driving ability evaluation.

关键词： Driving ability evaluation Driving style Unsupervised decision tree Gaussian kernel function Human-machine shared control

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 novel method for modeling the phase change of iron ore particles in the cohesive zone of a blast furnace

引用

Particuology 2024年第3期86卷 252-261页

作者： Dianyu e Yingming Wen Jiayun Dan Youyuan Jiang Guangchao Wei Jiaxin Cui Jiangxi Provincial Key Laboratory for Simulation and Modelling of Particulate Systems Jiangxi University of Science and TechnologyNanchang330013China International Institute for Innovation Jiangxi University of Science and TechnologyNanchang330013China Ironmaking Plant Xiangtan Iron and Steel Corporation of Hunan HualingXiangtan411101China Schoolof Transportation and vehicle enginering Shandong University of TechnologyZibo255000China

Cohesive zone plays a vital role in the stable operation of a blast furnace(BF),yet the complex phase change process of iron ore particles in this zone is still not well *** this study,a novel one-dimensional(1D)unsteady phase change model was developed to elucidate the heat transfer and melting mechanisms of iron ore *** model validation,the effects of several key operating parameters(e.g.,particle diameter,gas velocity,initial temperature)on the phase change behavior of iron ore particles were analyzed,and the joint effect of multiple parameters was *** results show that larger-sized iron ore particles possess lower specific surface areas,which in turn reduces their convective heat absorption ***,the distance from the solid-liquid phase interface to the particle surface increases,thereby slowing down the movement of the phase interface and pro-longing the melting duration of the *** the gas velocity and the initial temperature does not have a significant impact on reducing the duration of the complete melting *** the specified conditions,it is observed that increasing the gas velocity by 3-fold and 9-fold results in a reduction of the melting duration by 2.4%and 8.3%,*** the initial temperature of iron ore particles results in a decrease in the core-to-surface temperature difference,a slower heating rate,and a shorter duration to achieve *** the factors affecting the melting process,the particle diameter is found to be the most significant in terms of the liquid phase precipitation,mushy zone thickness,and core-to-surface temperature difference of iron ore particles.

关键词： Blast furnace Iron ore melting Cohesive zone Heat transfer Phase change

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

Bulking Up the Bay-Position Substituents enables enhanced Selectivity of Cs‑Symmetric Boron Subphthalocyanine−Subnaphthalocyanine Hybrids

引用

Precision Chemistry 2024年第4期2卷 161-181页

作者： Nina F.Farac Alan J.Lough Timothy P.Bender Department of Chemical engineering and Applied Chemistry University of TorontoTorontoOntario M5S 3E5Canada Department of Chemistry University of TorontoTorontoOntario M5S 3H6Canada Department of Materials Science and engineering University of TorontoTorontoOntario M5S 3E4Canada Department of Mechanical and Industrial engineering University of TorontoTorontoOntario M5S 3G8Canada

The precise synthesis of subporphyrinoid hybrids withπ-expanded topologies and unique material properties plays a promising role in the design of functional ***,selective,and controllable routes to boron subphthalocyanine−subnaphthalocyanine hybrids,Bsub(Pc_(3‑p)-Ncp)s,are desirable for this purpose yet synthetically challenging due to random mixtures of Cs-,C3v-,and,in some cases,C1-symmetric compounds that form during traditional statistical mixed ***,we addressed this issue by developing a sterically driven mixed cyclotrimerization with enhanced selectivity for the targeted Cs-symmetric hybrid and complete suppression of sterically crowded macrocyclic *** process,coupled with a rationally designed precursor bearing bulky phenyl substituents,enabled the synthesis and characterization of bay-position phenylated Ph2-(Rp)8Bsub(Pc_(2)-Nc_(1))hybrids with halogens(Rp=Cl or F)in their peripheral isoindole *** selectivity ranged between 59 and 72%with remarkable yields,significantly higher than that of conventional mixed *** findings were augmented by theoretical calculations on precursor Lewis basicity as guiding principles into hybrid macrocycle ***,the incorporation of unfused phenyl groups and halogen atoms into the hybrid framework resulted in fine-tuned optical,structural,electronic,and electrochemical *** straightforward approach achieved improved selectivity and controlled narrowing of the product distribution,affording the efficient synthesis of structurally sophisticated Bsub(Pc_(2)-Nc_(1))*** then expands the library of 3-dimensionalπ-extended macrocycles for use in a range of applications,such as in optoelectronic devices with precisely tailored optical properties.

关键词： subphthalocyanine hybrids low-symmetry aromatic macrocycle selective cyclotrimerization sterically driven chemistry broad absorption material properties

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

玄武岩CO_(2)矿化封存监测方法和技术体系研究

引用

水文地质工程地质 2024年第4期51卷 41-52页

作者：廖松林马诗佳夏菖佑高志豪刘牧心梁希戴青黄新我蒋泽原于冰清广东南方碳捕集与封存产业中心广东广州510440 伦敦大学学院伦敦WC1E 6BT 腾讯公司广东深圳518057

玄武岩CO_(2)矿化封存是近年来逐渐受到关注的新一类CO_(2)地质封存方式,已在冰岛和美国成功开展技术示范。玄武岩CO_(2)矿化封存主要将CO_(2)转化为固体矿物,在CO_(2)注入方式、埋存深度、储盖层物理性质要求等方面与砂岩储层碳封存差... 详细信息

玄武岩CO_(2)矿化封存是近年来逐渐受到关注的新一类CO_(2)地质封存方式,已在冰岛和美国成功开展技术示范。玄武岩CO_(2)矿化封存主要将CO_(2)转化为固体矿物,在CO_(2)注入方式、埋存深度、储盖层物理性质要求等方面与砂岩储层碳封存差异较大,两者监测方案也存在显著差异。文章基于美国Wallula项目和冰岛Carbfix项目的监测经验,结合玄武岩CO_(2)矿化封存特点,梳理不同CO_(2)注入相态(超临界态和溶解态)的玄武岩CO_(2)矿化封存监测方案,横向比较玄武岩CO_(2)矿化封存、咸水层封存和油气藏封存的监测体系。砂岩储层的封存监测体系侧重观测CO_(2)储层的地质构造完整性,以及评价潜在泄漏路径上CO_(2)浓度的变化,监测周期通常要求在50 a以上。相较而言,玄武岩CO_(2)矿化封存监测体系侧重于观测“水-CO_(2)-玄武岩”的矿化反应效果,反映井下流体物质性质的变化,包括各化学组分浓度、示踪剂浓度、p H值等参数,定性定量评价矿化反应程度及碳封存效果。最后,基于咸水层封存和油气藏封存的监测技术经验,结合玄武岩CO_(2)矿化封存监测的技术需求,总结提出由监测范围、监测目的、监测方案和预警体系4大部分组成的玄武岩CO_(2)矿化封存通用性监测体系,形成了“地下-井筒-地表-地上”的三维空间监测体系。文章提出的玄武岩CO_(2)矿化封存监测方法和技术体系具有通用性,可为未来开展玄武岩CO_(2)矿化封存示范项目提供借鉴。

关键词：玄武岩二氧化碳矿化封存监测技术监测体系

来源：

维普期刊数据库

同方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

In-situ study of the microstructure evolution during tension of a Mg-Y-Zn-Al alloy processed by rapidly solidified ribbon consolidation technique

引用

Journal of Magnesium and Alloys 2024年第5期12卷 2024-2040页

作者： Jen? Gubicza Kristián Máthis Péter Nagy Péter Jenei Zoltán Heged?s Andrea Farkas Jozef Vesely Shin-ichi Inoue Daria Drozdenko Yoshihito Kawamura Department of Materials Physics Faculty of Science E?tv?s Loránd University Department of Physics of Materials Faculty of Mathematics and Physics Charles University Deutsches elektronen-Synchrotron DeSY Magnesium Research Center Kumamoto University

Mg-Y-Zn-Al alloys processed by rapidly solidified ribbon consolidation（RSRC） technique exhibit an exceptional mechanical performance indicating promising application potential. This material has a bimodal microstructure consisting of fine recrystallized and coarse non-recrystallized grains with solute-rich stacking faults forming cluster arranged layers（CALs） and nanoplates（CANaPs）, or complete long period stacking ordered（LPSO） phase. In order to reveal the deformation mechanisms, in-situ synchrotron X-ray diffraction line profile analysis was employed for a detailed study of the dislocation arrangement created during tension in Mg-0.9% Zn-2.05% Y-0.15%Al（at%） alloy. For uncovering the effect of the initial microstructure on the mechanical performance, additional samples were obtained by annealing of the as-consolidated specimen at 300 and 400 ℃ for 2 h. The heat treatment at 300 ℃ had no significant effect on the initial microstructure, its evolution during tension and, thus, the overall deformation behavior under tensile loading. On the other hand,annealing at 400 ℃ resulted in a significant increase of the recrystallized grains fraction and a decrease of the dislocation density, leading to only minor degradation of the mechanical strength. The maximum dislocation density at the failure of the samples corresponding to the plastic strain of 10-25% was estimated to be about 16-20 × 1014m-2. The diffraction profile analysis indicated that most dislocations formed during tension were of non-basaland pyramidaltypes, what was also in agreement with the Schmid factor values revealed independently from orientation maps. It was also shown that the dislocation-induced Taylor hardening was much lower below the plastic strain of 3% than above this value, which was explained by a model of the interaction between prismatic dislocations and CANaPs/LPSO plates.

关键词： Mg-Zn-Y-Al alloy Long period stacking ordered (LPSO) phase Cluster arranged nanoplates (CANaPs) Annealing Tension Dislocation density Hardening

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

全科医学和初级保健横断面研究的基本设计和实施步骤

引用

中国全科医学 2024年第13期27卷 1584-1593页

作者：李雪迎康晓平迟春花王熙诚尚美霞周国鹏高畅潘子涵北京大学第一医院医学统计室北京市100034 北京大学公共卫生学院流行病学与卫生统计学系北京市100191 北京大学第一医院全科医学科北京市100034 University College London school of managementGower StreetLondon WC1E 6BT

横断面研究是经典的研究设计方法之一,在临床各个专业中均有广泛的应用。在全科医学研究中大量科学问题的解答采用了横断面研究设计。这其中不仅包括了对人群健康特征,疾病特征或卫生服务现状的调查研究,还包括了面向社区人群的疾病筛... 详细信息

横断面研究是经典的研究设计方法之一,在临床各个专业中均有广泛的应用。在全科医学研究中大量科学问题的解答采用了横断面研究设计。这其中不仅包括了对人群健康特征,疾病特征或卫生服务现状的调查研究,还包括了面向社区人群的疾病筛查诊断方法构建等多种研究场景。在全科医学领域中,横断面研究可以做现况描述和比较分析,关联因素分析以及社区筛查诊断方法探索。开展横断面研究应包括研究设计和研究实施两个阶段,研究设计包括准确提炼研究目标,明确研究人群,研究因素及结局指标等临床要素以及确定样本获取方式,明确样本量的确定依据及合理的统计分析策略等方法学要素。研究实施,则需要通过完备的研究方案和病例报告表呈现研究设计思路,在伦理批准的前提下开展数据收集工作,同时注重数据管理工作质量并严格执行方案中的统计分析方法,求证医学问题。横断面研究的特点是相比于随访观察研究所需要的研究周期相对较短,不同基础的研究团队都能找到适合的研究方向,通过了解健康医疗现状,从探讨关联因素创建筛查方法等角度,服务社区医疗。

关键词：全科医学初级卫生保健横断面研究调查研究关联性分析诊断能力评价研究设计

来源：

维普期刊数据库博看期刊

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■Q(q=u,d;Q=c,b)tetraquark system in a chiral quark model

引用

Chinese Physics C 2024年第7期48卷 84-105页

作者：杨刚平加伦 Jorge Segovia Department of Physics Zhejiang Normal UniversityJinhua 321004China Department of Physics and Jiangsu Key Laboratory for Numerical Simulation of Large Scale Complex Systems Nanjing Normal UniversityNanjing 210023China Departamento de Sistemas Físicos Químicos y NaturalesUniversidad Pablo de OlavideE-41013 SevillaSpain

The S-wave■tetraquarks,with spin-parities■,and 2+,in both isoscalar and isovector sectors,are systematically studied using a chiral quark *** meson-meson,diquark-antidiquark,and K-type arrangements of quarks and all possible color wave functions are comprehensively *** four-body system is solved using the Gaussian expansion method,a highly efficient computational ***,a complex-scaling formulation of the problem is established to disentangle bound,resonance,and scattering *** theoretical framework has already been successfully applied in various tetra-and penta-quark *** the complete coupled channel and within the complex-range formulation,several narrow resonances of■systems are obtained,in each allowed■-channel,within the energy regions of■GeV and 5.7-6.7GeV,*** predicted exotic states,which indicate a richer color structure when going towards multiquark systems beyond mesons and baryons,are expected to be confirmed in future high-energy particle and nuclear experiments.

关键词： quantum chromodynamics quark models

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

Shear-wave elastography to predict hepatocellular carcinoma after hepatitis C virus eradication:A systematic review and meta-analysis

引用

World Journal of Gastroenterology 2024年第10期30卷 1450-1460页

作者： Giorgio esposto Paolo Santini Linda Galasso Irene Mignini Maria elena Ainora Antonio Gasbarrini Maria Assunta Zocco CeMAD Digestive Disease Center Fondazione Policlinico Universitario“A.Gemelli”IRCCSCatholic University of RomeRome 00168Italy Fondazione Policlinico Universitario Agostino Gemelli IRCCS Fondazione Policlinico Universitario Agostino Gemelli IRCCS-UniversitàCattolica del Sacro CuoreRome 00168Italy Medicina Interna e Gastroenterologia CEMAD Digestive Disease CenterUniversitàCattolica del Sacro CuoreFondazione Policlinico Universitario A Gemelli IRCCSRome 00168Italy

BACKGROUND Direct-acting antiviral agents(DAAs)are highly effective treatment for chronic hepatitis C(CHC)with a significant rate of sustained virologic response(SVR).The achievement of SVR is crucial to prevent additional liver damage and slow down fibrosis *** assessment of fibrosis degree can be performed with transient elastography,magnetic resonance elastography or shear-wave elastography(SWe).Liver elastography could function as a predictor for hepato-cellular carcinoma(HCC)in CHC patients treated with *** To explore the predictive value of SWe for HCC development after complete clearance of hepatitis C virus(HCV).MeTHODS A comprehensive literature search of clinical studies was performed to identify the ability of SWe to predict HCC occurrence after HCV *** accordance with the study protocol,a qualitative and quantitative analysis of the evidence was *** At baseline and after 12 wk of follow-up,a trend was shown towards greater liver stiffness(LS)in those who go on to develop HCC compared to those who do not[baseline LS standardized mean difference(SMD):1.15,95%confidence interval(95%CI):020-2.50;LS SMD after 12 wk:0.83,95%CI:0.33-1.98].The absence of a statistically significant difference between the mean LS in those who developed HCC or not may be related to the inability to correct for confounding factors and the absence of raw source *** was a statist-ically significant LS SMD at 24 wk of follow-up between patients who developed HCC vs not(0.64;95%CI:0.04-1.24).CONCLUSION SWe could be a promising tool for prediction of HCC occurrence in patients treated with *** studies with larger cohorts and standardized timing of elastographic evaluation are needed to confirm these data.

关键词： Shear-wave elastography Hepatocellular carcinoma Hepatitis C virus Sustained virologic response

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

Compensation Model for Shape Measuring of Cold Strip Rolling

引用

Journal of Iron and Steel Research(International) 2010年第6期17卷 21-26页

作者： YU Bing-qiang SUN Ya-bo LIU Hong-min YOU Lei PeNG Yan engineering Research Center of Rolling equipment and complete Technology of Ministry of education Yanshan University Qinhuangdao 066004 Hebei China

Some unavoidable factors in the process of cold strip shape measurement interfere with the shape meter, so the shape measuring results cannot reflect the true shape of the strip and the measuring precision is low. The influ- ences of the measuring error of the strip edges, the transverse temperature difference of the strip, the deflection of shape detection roller, and the shape of the strip coil on the shape measuring results were analyzed in detail, and the corresponding compensation models were established. The simulation calculation and analysis were carried out on a cold strip mill, and a number of disciplinarian cognitions were obtained.

关键词： cold strip rolling shape measuring compensation model

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

基于主从力反馈的同构主手设计与研究

引用

机械设计与研究 2024年第1期40卷 63-68页

作者：陈铮王晨麟夏华磊刘振武张伟军上海交通大学机械与动力工程学院上海200240E-mail:zhangweijun@*** 国网徐州供电公司江苏徐州221000

在变电站场景中,巡检机器人已经逐步取代人工巡检作业。但现有机器人存在遥操作效率低、无法很好地实现拟人化操作等问题,难以完成变电站巡检作业中急停、拉闸等接触性操作任务,亟需研发对变电站巡检具有高适应性的协同作业机器人。针... 详细信息

在变电站场景中,巡检机器人已经逐步取代人工巡检作业。但现有机器人存在遥操作效率低、无法很好地实现拟人化操作等问题,难以完成变电站巡检作业中急停、拉闸等接触性操作任务,亟需研发对变电站巡检具有高适应性的协同作业机器人。针对变电站巡检处置应用需求,开展了基于主从力反馈的巡检机器人遥操作技术研究,设计了一款串联型同构主手,结构上主从映射关系直接,控制上力反馈双向控制完整,实现了六自由度机械臂主从力反馈,便于进行精细化操作。开展主从力反馈技术研究,通过构建和简化动力学模型实现负载、摩擦力补偿,采用力直接反馈型双向控制策略。完成样机研制并进行了功能验证和精度测试实验,结果表明主手能够较好地完成巡检操作基本任务,力反馈误差小于7%,机械臂末端跟踪精度优于2 mm,验证了机械结构及控制系统的有效性。

关键词：巡检机器人同构主手主从控制力反馈

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：