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A human hybrid tracking and localization method for mixed reality simulation of complex system

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International Journal of Modeling, Simulation, and Scientific Computing 2022年第2期13卷 187-199页

作者： yufen wu Yi Lv Dawei Wang Yang Xue Shuhong Xu Beijing Aircraft Technology Research Institute Comac Beijing 102211P.R.China

In order to obtain stable and high-precision motion tracking in mixed reality(MR)simulation of the complex system,an optical-inertial hybrid tracking method is proposed,which combines the accuracy of optical motion capture equipment and the robustness of inertial motion capture equipment,and can reduce the occlusion problem of entity scene on the premise of ensuring the localization *** method has been applied to the ergonomic evaluation of large civil aircraft development processes,and the effectiveness and usability of the method have been verified.

关键词： Complex system simulation motion tracking optical-inertial fusion mixed reality scene

A mixed reality simulation evaluation method for complex system

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International Journal of Modeling, Simulation, and Scientific Computing 2022年第2期13卷 200-214页

作者： Lijun Wang Yang Xue Yi Lv yufen wu Dawei Wang Shuhong Xu Beijing Aircraft Technology Research Institute Comac Beijing 102211P.R.China

In order to analyze the proposed method,this paper takes the cockpit as the complex system,since the traditional cockpit design evaluation method can set up an actual engineering *** this method can realize the accurate evaluation of the internal structure layout,control devices,and interface display of the cockpit,it is dif-ficult to make modifications once the production is completed,which is not suitable for multi-scheme comparison and rapid iteration in the early stage of civil aircraft *** this regard,this paper establishes the civil aircraft cockpit physical environment and the corresponding virtual cockpit environment based on the virtual-real matching tech-nology,then proposes a mixed reality simulation evaluation method so as to realize the real-time ergonomic evaluation of the digital human body followed by a real *** results show that this mixed reality simulation evaluation method can effectively improve the evaluation accuracy of cockpit design,ensure the efficiency of multi-scheme comparison and optimization iteration in the early stage of cockpit design.

关键词： Civil aircraft cockpit design mixed reality virtual-real matching ergonomic evaluation

3D interlocked all-textile structured triboelectric pressure sensor for accurately measuring epidermal pulse waves in amphibious environments

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Nano Research 2024年第3期17卷 1923-1932页

作者： Shaobo Si Chenchen Sun yufen wu Jingjing Li Han Wang Yinggang Lin Jin Yang Zhong Lin Wang Department of Optoelectronic Engineering Key Laboratory of Optoelectronic Technology and Systems Ministry of EducationChongqing UniversityChongqing 400044China College of Physics and Electronic Engineering Chongqing Normal UniversityChongqing 401331China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 100083China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

The performance degradation and even damage of the e-textiles caused by sweat,water,or submersion during all-weather health monitoring are the main reasons that e-textiles have not been commercialized and routinized so ***,we developed an amphibious,high-performance,air-permeable,and comfortable all-textile triboelectric sensor for continuous and precise measurement of epidermal pulse waves during full-day *** on the principle of preparing gas by acid-base neutralization reaction,a one-piece preparation process of amphibious conductive yarn(ACY)with densely porous structures is *** innovative three-dimensional(3D)interlocking fabric knitted from ACYs(0.6 mm in diameter)and polytetrafluoroethylene yarns exhibit high sensitivity(0.433 V·kPa^(-1)),wide bandwidth(up to 10 Hz),and stability(>30,000 cycles).With these benefits,98.8%agreement was achieved between wrist pulse waves acquired by the sensor and a high-precision laser ***,the polytetrafluoroethylene yarn with good compression resilience provides sufficient mechanical support for the contact separation of the ***,the unique skeletonized design of the 3D interlocking structure can effectively relieve the water pressure on the sensor surface to obtain stable and accurate pulse waves(underwater depth of 5 cm).This achievement represents an important step in improving the practicality of e-textiles and early diagnosis of cardiovascular diseases.

关键词： triboelectric pressure sensor amphibious fabric interlocking fabric pulse wave measurement one-piece preparation method

Waterproof Iontronic Yarn for Highly Sensitive Biomechanical Strain Monitoring in Wearable Electronics

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Advanced Fiber Materials 2024年第3期6卷 925-935页

作者： Zhiping Feng Qiang He Xue Wang Jing Qiu Hongbing wu Yinggang Lin yufen wu Jin Yang Department of Optoelectronic Engineering Key Laboratory of Optoelectronic Technology and SystemsMinistry of EducationChongqing UniversityChongqingChina 400044 College of Physics and Electronic Engineering Chongqing Normal UniversityChongqing 400044China

Flexible yarn sensors designed for integration into textiles have the potential to revolutionize wearable technology by continuously monitoring biomechanical ***,existing yarn-shaped sensors rely on capacitance as a strain-dependent electrical signal and often face limitations in achieving high sensitivity,especially across a broad strain ***,we propose a waterproof all-in-one capacitive yarn sensor(ACYS)that is tailored to monitor a wide range of biophysical *** to the coaxial helical electrode and the ionic liquid-doped dielectric layer,the ACYS demonstrates remarkable stretchability,ultrahigh capacitance variation,and an outstanding gauge factor of 6.46 at 140%*** exceptional mechanical durability based on enduring 3300 stretching cycles and favorable resistance to sweat erosion,this 1D structure can be seamlessly integrated into textiles,making it ideal for use in wearable *** its application versatility,the ACYS accurately measures biomechanical strain in joint movements,facial expressions,and physiological assessments,making it a promising advancement in wearable technology.

关键词： Iontronic yarn Capacitive strain sensor High sensitivity Biomechanical strain

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儿童不同呼吸道感染性疾病对肺功能的影响

中华实用儿科临床杂志 2019年第22期34卷 1693-1697页

作者：张皓邬宇芬国家儿童医学中心/上海交通大学医学院附属上海儿童医学中心呼吸科上海200127

儿童呼吸道感染性疾病是儿童住院及死亡的第1位原因,如何尽早明确诊断、判断疾病严重程度、给予针对性治疗是痊愈的关键.肺功能可对患儿的呼吸生理、病理进行准确地评估,对疾病的诊断、鉴别诊断、治疗随访起很大的临床辅助作用.同时作... 详细信息

儿童呼吸道感染性疾病是儿童住院及死亡的第1位原因,如何尽早明确诊断、判断疾病严重程度、给予针对性治疗是痊愈的关键.肺功能可对患儿的呼吸生理、病理进行准确地评估,对疾病的诊断、鉴别诊断、治疗随访起很大的临床辅助作用.同时作为一项非侵入性、无射线的检查技术,家长接受度高,也为其作为临床长期随访及对呼吸道疾病的研究提供了可能.虽然实用价值高,但作为一项较新的技术,在儿童,尤其是婴幼儿呼吸道感染性疾病中的应用,目前医师熟悉度并不高.现从临床的角度来诠释儿童感染性疾病和儿童肺功能之间的关联,从常用的肺功能介绍,到常见的儿童呼吸道感染性疾病病理生理,以此为基础,来阐述不同感染和儿童肺功能之间的关系.

关键词：儿童呼吸道感染性疾病肺功能

巴黎大区城市空间与轨道交通网发展的关系分析

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城市轨道交通研究 2014年第6期17卷 4-10页

作者：吴育芬赛思达上海技术咨询有限公司上海工程师200070

介绍了巴黎大区各个历史阶段中城市空间与轨道交通的发展历程。二战后,巴黎大区城市建设经历了漫长的"强极核、多中心"发展阶段,直至今天"大巴黎计划"提出的向内外均衡模式进行过渡。在这样的历史环境和城市空间发展变革前提下,巴黎大... 详细信息

介绍了巴黎大区各个历史阶段中城市空间与轨道交通的发展历程。二战后,巴黎大区城市建设经历了漫长的"强极核、多中心"发展阶段,直至今天"大巴黎计划"提出的向内外均衡模式进行过渡。在这样的历史环境和城市空间发展变革前提下,巴黎大区轨道交通网络秉承了"由内而外、先径向后环向"的发展逻辑,且市郊铁路、市域快线、地铁线路和有轨电车等轨道交通在覆盖范围、服务对象、线路形态等方面上实现了错位发展、互为补充。巴黎大区轨道交通和城市空间发展相互支持、相互作用,形成了密不可分的整体。

关键词：巴黎大区城市空间轨道交通发展关系

香榧假种皮提取物的提取工艺及其主要成分分析

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中国食品学报 2015年第3期15卷 97-105页

作者：于勇杰吴帆李彪韩琴邬玉芬倪穗宁波大学海洋学院浙江宁波315211 宁波市宁海县林特科技推广总站浙江宁海315600

采用有机溶剂法研究香榧假种皮提取物的提取工艺。确定提取溶剂后,在单因素试验基础上,选取对提取率影响较显著的提取时间、提取温度、液料比3个因素作为变量,以香榧假种皮提取物得率为指标,采用Box-Behnken试验设计方法做三因素三水平... 详细信息

采用有机溶剂法研究香榧假种皮提取物的提取工艺。确定提取溶剂后,在单因素试验基础上,选取对提取率影响较显著的提取时间、提取温度、液料比3个因素作为变量,以香榧假种皮提取物得率为指标,采用Box-Behnken试验设计方法做三因素三水平试验,得到香榧假种皮提取物的提取工艺。利用Design Expert软件得到回归方程的预测模型,做响应面分析,确定香榧假种皮提取物的提取工艺：石油醚（沸程30-60℃）为溶剂,粉碎度40目,提取时间2.6 h,液料比11 m L/g,提取温度51℃。在此条件下提取物平均得率为18.28%。经GCMS分析,香榧假种皮提取物的主要成分为二萜类物质,其次为倍半萜类和单萜类物质。

关键词：香榧假种皮提取物响应面法主要成分分析

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中运量公交系统建设的必要性研究

现代城市轨道交通 2014年第3期 9-14页

作者：吴育芬赛思达上海技术咨询有限公司工程师上海200070

在国内提倡"节能减排"大环境下,从城市交通出行、城市低碳发展、完善城市轨道交通线网等级划分、新城公交导向型开发(TOD)、提升城市形象以及体现新城面貌的需求等方面分析了城市建设中运量公交系统的必要性。中运量公交系统的建设同时... 详细信息

在国内提倡"节能减排"大环境下,从城市交通出行、城市低碳发展、完善城市轨道交通线网等级划分、新城公交导向型开发(TOD)、提升城市形象以及体现新城面貌的需求等方面分析了城市建设中运量公交系统的必要性。中运量公交系统的建设同时应结合客流需求、投资成本等做出适宜的选择。

关键词：中运量公交系统城市轨道交通必要性研究

超临界CO_2萃取香榧假种皮提取物的工艺优化及其主要成分分析

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中国粮油学报 2015年第6期30卷 67-73页

作者：于勇杰韩琴倪穗邬玉芬桑卫国宁波大学海洋学院宁波315211 宁波市宁海县林特技术推广总站宁海315600

采用响应面法优化了超临界CO2流体萃取(SCE)香榧假种皮提取物的工艺,并采用气相色谱质谱联用仪(GC-MS)对其提取物成分进行了分析。在单因素试验的基础上,选取动态萃取时间、萃取温度、萃取压力作为变量,以香榧假种皮提取物得率为指标,采... 详细信息

采用响应面法优化了超临界CO2流体萃取(SCE)香榧假种皮提取物的工艺,并采用气相色谱质谱联用仪(GC-MS)对其提取物成分进行了分析。在单因素试验的基础上,选取动态萃取时间、萃取温度、萃取压力作为变量,以香榧假种皮提取物得率为指标,采用Box-Behnken试验设计方法进行三因素三水平试验,根据回归方程的预测模型对结果进行响应面分析,确定超临界CO2流体萃取香榧假种皮提取物的优化工艺为:粉碎度40目,静态萃取时间20 min,动态萃取时间2.5 h、萃取温度45℃、萃取压力34 MPa,在此条件下提取物平均提取率为(22.12±0.09)%。经过GC-MS检测分析,香榧假种皮提取物的主要成分为二萜类物质,其次为羧酸、酯类、倍半萜类和单萜类物质。

关键词：超临界CO2萃取香榧假种皮响应面法气相色谱质谱联用仪