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Evaluation Model of Design for Operation and Architecture of Hierarchical Virtual Simulation for Flight Vehicle Design

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Chinese Journal of Aeronautics 2012年第2期25卷 216-226页

作者： LIU Hua TIAN Yongliang zhang chaoying YIN Jiao SUN Yijie School of Aeronautic Science and Engineering Beihang University Beijing 100191 China Institute for Aviation Safety China Academy of Civil Aviation Science and Technology Beijing 100028 China

In order to take requirements for commercial operations or military missions into better consideration in new flight vehicle design, a tri-hierarchical task classification model of ＂design for operation＂ is proposed, which takes basic man-object interaction task, complex collaborative operation and large-scale joint operation into account. The corresponding general architecture of evaluation criteria is also depicted. Then a virtual simulation-based approach to implement the evaluations at three hierarchy levels is mainly analyzed with a detailed example, which validates the feasibility and effectiveness of evaluation architecture. Finally, extending the virtual simulation architecture from design to operation training is discussed.

关键词： flight vehicle design operation virtual simulation training evaluation model

Dama People in Gyilung Gully

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China's Tibet 2003年第4期14卷 30-31页

作者： zhang chaoying

Winter in the hinterland of the Himalayan area is adesolate scene, yet it is also a land that remains full of boundless charm. As our jeep set out from Lhasa and bumped toward the highest peak in the world via the int... 详细信息

关键词：大马人西藏生活习俗社会地位

浙江大学口腔医学专业学位硕士研究生抑郁及焦虑现状分析

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医学教育研究与实践 2024年第2期32卷 206-211,230页

作者：龚佳幸陈飞陆科杰钱颖张超颖俞梦飞浙江大学医学院附属口腔医院/浙江大学口腔医学院/浙江省口腔疾病临床医学研究中心/浙江省口腔生物医学研究重点实验室/浙江大学癌症研究院浙江杭州310006

目的探讨不同年级、性别、导师类型的口腔医学专业学位硕士研究生抑郁、焦虑情况,探讨压力来源并进行对策分析。方法2022年6月,采用问卷调查法,调查浙江大学162名口腔医学专业学位硕士研究生的基本信息、抑郁和焦虑情况、压力来源及释... 详细信息

目的探讨不同年级、性别、导师类型的口腔医学专业学位硕士研究生抑郁、焦虑情况,探讨压力来源并进行对策分析。方法2022年6月,采用问卷调查法,调查浙江大学162名口腔医学专业学位硕士研究生的基本信息、抑郁和焦虑情况、压力来源及释放方法,根据年级、性别和导师类型分类并进行统计学分析。结果专业学位硕士研究生的抑郁和焦虑总检出率分别为14.20%和58.02%,研一的抑郁和焦虑检出率分别为23.33%和71.67%,远高于研二(11.86%和59.32%)和研三(4.65%和33.21%),差异具有统计学意义(P<0.05)。导师为博导的学生抑郁分数较高(1.78±1.42分,P<0.05),而抑郁与性别无显著性相关。学生平时的主要压力来源是毕业论文(7.17)、科研(5.09)、求职(4.86)和读博(4.30)。常通过与朋友交谈(80.86%)、睡觉(68.52%)、看电视/电影(66.67%)、聚餐(55.56%)、听音乐(52.47%)来释放压力。结论口腔医学专业学位硕士研究生压力普遍较大,学生自入学后就有较高比例处于抑郁或焦虑状态。毕业和科研压力是医学生焦虑及抑郁情绪产生的主要原因。学校应从需求出发,从根源解决,对专硕分级指导。在培养过程中应当以研究生教育办为总负责,多部门联动,构建“级联指导”模型,促进专硕跨级交流。同时合理利用医院健身房和学校体育馆,举办各类运动和课程,促进学生身心健康。

关键词：口腔医学专业学位硕士研究生抑郁焦虑

Design and preparation of a crosslinkable,oil-resistant,and bio-based elastomer from fumarate

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Science China Chemistry 2024年第2期67卷 622-631页

作者： Hui Yang Haijun Ji Xinxin Zhou Shihan Yang Liwei Li chaoying Sun Weiwei Lei Runguo Wang Liqun zhang Beijing State Key Laboratory of Organic-Inorganic Composites&Beijing Laboratory of Biomedical Materials Beijing University of Chemical TechnologyBeijing100029China Hubei Key Laboratory of Polymer Materials Faculty of Materials Science and EngineeringHubei UniversityWuhan430062China

Poly(diethyl fumarate-co-methoxyethyl acrylate-co-vinyl chloroacetate)(PDEFMV),a novel bio-based elastomer with a saturated structure,was synthesized via redox emulsion *** glass-transition temperatures of PDEFMV,adjusted through the variation of the diethyl fumarate-to-methoxyethyl acrylate feeding ratio,ranged from-36.1 to-14.8 ℃.The number-average molecular weights of PDEFMV ranged from 384,000 to 46,000 g/*** designing the molecular structure,vinyl chloroacetate was used to provide active sites for subsequent vulcanization and *** active chlorine groups within the PDEFMV chain reacted with the crosslinking agent trithiocyanuric acid under high temperature and pressure to form a nonsulfur crosslinked three-dimensional network *** achieve the desired properties,carbon black(CB,N330) was incorporated to reinforce PDEFMV,leading to the formation of PDEFMV/CB composites.A comprehensive study was conducted on the high-temperature oil resistance of PDEFMV/CB *** immersion in IRM903 oil at temperatures of 150 and 200 ℃ for 72 h,the mass and volume changes in PDEFMV/CB were lower than those observed in commercially available acrylate rubber(AR)/CB,indicating that PDEFMV exhibited superior oil ***,the aging characteristics and mechanisms of oil resistance in the PDEFMV/CB and AR/CB composites were investigated at different temperatures(150,200,and 250 ℃).The results provide insights into the operational temperature ranges suitable for PDEFMV/CB and offer valuable guidance for potential industrial applications.

关键词： diethyl fumarate molecular design bio-based elastomer solvent-free synthetic route high-temperature oil resistance

Characteristics and genetic mechanism of the Mesoproterozoic rift system,Ordos Basin,China

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Energy Geoscience

Energy Geoscience 2024年第1期5卷 141-152页

作者： Meng Li Xiangbin Yan Wei zhang Yuanling Guo chaoying Liu Lingling Fan Shuang Yang Petroleum Exploration and Production Research Institute SINOPECBeijing100083China Exploration and Development Research Institute SINOPEC North China CompanyZhengzhouHenan450006China

The Mesoproterozoic rifts are developed in the Ordos Basin located in the western margin of the North China *** on the latest 3D seismic data and previous research results,this study intends to discuss the zonal differential deformation characteristics and genetic mechanism of the Mesoproterozoic rifts in the Ordos ***-trending rifts are developed in the Mesoproterozoic in the south-central Ordos Basin,the main part of which are located near the western margin of the North China ***-trending rifts are developed in the north of the basin,while NW-NNW rifts in the Mesoproterozoic in Hangjinqi *** genetic mechanism of the Mesoproterozoic rifts is related to regional extensional stress field,plate boundary conditions and internal preexisting *** main extensional stress direction strikes NWW-SSE(120°)in the western margin of the North China Plate,based on the forward rift trend of the northern *** Hangjinqi area,the reactivation of the existing NWtrending Wulansu fault and NW-NW-trending Daolao fault,results in dextral shear stress *** boundary between the western margin of the North China Plate and its adjacent plates forms a nearly NS-trending preexisting basement tectonic belt,which intersects with the NWW-SSE(120°)extensional stress at an acute angle of 60°.Therefore,the western margin of the North China Plate is formed by oblique normal faults under oblique *** to the long time span of Columbia Supercontinent breakup(1.8e1.6 Ga),the oblique rift in the south-central Ordos Basin is formed under the continuous oblique extension at the western margin of the North China Plate.

关键词： Columbia Supercontinent Ordos Basin Rift system Mesoproterozoic Genetic mechanism

Simulation of Learners’ Behaviors Based on the Modified Cellular Automata Model

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Intelligent Information Management 2010年第9期2卷 563-568页

作者： Zhenyan Liang Haiyan Liu chaoying zhang Shangyuan Yang 不详

This study develops a computational model for simulation of behaviors of learners under the influence of motivation and engagement environment based on Cellular Automata (CA). It investigates the changing patterns of learners’ behaviors when motivation and engagement environment are assigned with different values respectively. The simulation process indicates that the internal factor, which is the motivation in this paper, plays a key role in changing learners’ behaviors under certain circumstance and the engagement environment also significantly influences learner’s perception. The results obtained also show good agreement with the phenomenon generally being observed in practice.

关键词： Motivation Engagement Cellular Automata Simulation Learner Behaviors

肾小球滤过率活体实时监测荧光示踪剂的研究进展

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高等学校化学学报 2022年第12期43卷 339-354页

作者：丁奕如张超颖谢贺新华东理工大学药学院上海市新药设计重点实验室上海200237

急性肾损伤是一种临床常见的急性疾病.通过外源性的荧光示踪剂对肾小球滤过率进行非侵入性的实时监测,对于及时了解易患病人的肾脏功能具有重要的临床价值和应用前景.本文综合评述了用于活体检测肾小球滤过率的外源性荧光示踪剂的近期... 详细信息

急性肾损伤是一种临床常见的急性疾病.通过外源性的荧光示踪剂对肾小球滤过率进行非侵入性的实时监测,对于及时了解易患病人的肾脏功能具有重要的临床价值和应用前景.本文综合评述了用于活体检测肾小球滤过率的外源性荧光示踪剂的近期研究进展,重点介绍了荧光示踪剂的设计策略及其活体成像应用效果,并对相应检测装置的发展进行了阐述,同时对该领域的挑战与发展前景进行了展望.

关键词：肾小球滤过率荧光示踪剂实时监测急性肾损伤

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添加保水剂对煤矸石基质保水性能的影响

中国水土保持科学 2020年第3期18卷 114-123页

作者：董颖李娜耿玉清张超英北京林业大学林学院北京100083

煤矸石是煤炭生产过程中产生的固体废弃物,保水能力较低。大量煤矸石堆积形成的煤矸石山会造成严重的环境污染问题。当前对煤矸石山治理的主要途径是在煤矸石山上直接覆土再植被重建,但是矿区土壤缺乏且立地条件极端恶劣;因此,探究在土... 详细信息

煤矸石是煤炭生产过程中产生的固体废弃物,保水能力较低。大量煤矸石堆积形成的煤矸石山会造成严重的环境污染问题。当前对煤矸石山治理的主要途径是在煤矸石山上直接覆土再植被重建,但是矿区土壤缺乏且立地条件极端恶劣;因此,探究在土壤中添加不同比例的煤矸石和保水剂,对合理利用煤矸石并提高其保水性能十分必要。以灵武羊场湾排土场为研究对象,设置矸土比3∶1(CGM1)、1∶1(CGM2)和1∶3(CGM3)3种煤矸石基质类型,并分别添加比例为0.1%、0.2%和0.5%的丙烯酰胺丙烯酸钾交聚物型(CLP)保水剂和凹凸棒复合丙烯酸丙烯酰胺型(WT)保水剂,通过土柱模拟法,测定煤矸石基质的孔性、吸水性、持水性及入渗特性。结果表明:CGM2和CGM3的孔隙度、持水量和累积入渗量高于CGM1。随着添加CLP和WT比例的提高,煤矸石基质的吸水量和持水量呈现出增加的趋势。添加CLP对土壤水分入渗具有促进作用,且随着添加比例增加,其促进作用越明显;而添加WT用量与煤矸石基质累积入渗量呈反比。多因素方差分析表明,煤矸石基质类型是影响基质持水量的主要因素,保水剂种类对煤矸石基质的累积入渗量的影响程度最大。将21个处理进行系统聚类分析发现,类别Ⅲ仅包含在CGM2下施加0.5%CLP的处理,该种处理的水分吸持性和入渗特性均优于其他处理。综合来看,添加保水剂可提高煤矸石基质的保水性能,在矸土比为1∶1下施加0.5%丙烯酰胺丙烯酸钾交聚物型保水剂具有最佳的保水效果。

关键词：保水剂煤矸石基质水分入渗保水性能聚类分析

EFFECT OF DISPERSED PHASE PARTICLES ON ELECTRICAL CONDUCTION OF PEO-NaSCN

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Chemical Research in Chinese Universities 1986年第1期4卷 97-101页

作者： He Yuankang,Chen Zhusheng and zhang ZhiyiWang chaoying and Chen Liquan(Department of Chemistry,Peking University,Beijing)(Institute of Physics,Academia,Beijing)

Fast ionic conductors are one kind of solid state material with ionic conductivity as high as that of melten salts or liquid *** conductivity is one of the important parameters for characterizing a fast ionic *** a long time materialists and chemists have made great efforts in search of new fast ionic conductors with high ionic *** view of structure,they have synthesised silver and copper fast ionic conductors with so called open *** it is not so successful for searching more applicable alkaline fast ionic *** polymer has flexibility for making thin film,it concentrates attention on the polymer-alkaline salt *** et *** first reported poly(ethylene oxide) (PEO)-alkaline salt *** on Armard et *** investigated the electrical property of PEO-NaSCN.

关键词： OC PEO EFFECT OF DISPERSED PHASE PARTICLES ON ELECTRICAL CONDUCTION OF PEO-NaSCN