A new approach is proposed to analyze the settlement behavior for single pile embedded in layered soils. Firstly, soil layers surrounding pile shaft are simulated by using distributed Voigt model, and finite soil laye...A new approach is proposed to analyze the settlement behavior for single pile embedded in layered soils. Firstly, soil layers surrounding pile shaft are simulated by using distributed Voigt model, and finite soil layers under the pile end are assumed to be virtual soil-pile whose cross-section area is the same as that of the pile shaft. Then, by means of Laplace transform and impedance function transfer method to solve the static equilibrium equation of pile, the analytical solution of the displacement impedance fimction at the pile head is derived. Furthermore, the analytical solution of the settlement at the head of single pile is theoretically derived by virtue of convolution theorem. Based on these solutions, the influences of parameters of soil-pile system on the settlement behavior for single pile are analyzed. Also, comparison of the load-settlement response for two well-instrumented field tests in multilayered soils is given to demonstrate the effectiveness and accuracy of the proposed approach. It can be noted that the presented solution can be used to calculate the settlement of single pile for the preliminary design of pile foundation.展开更多
Multi-disciplinary virtual prototypes of complex products are increasingly and widely used in modern advanced manufactur- ing. How to effectively address the problems of unified modeling, composition and reuse based o...Multi-disciplinary virtual prototypes of complex products are increasingly and widely used in modern advanced manufactur- ing. How to effectively address the problems of unified modeling, composition and reuse based on the multi-disciplinary heteroge- neous models has brought great challenges to the modeling and simulation （M＆S） science and technology. This paper presents a top-level modeling theory based on the meta modeling framework （M2F） of the COllaborative SIMulation （COSlM） theory of virtual prototyping to solve the problems. Firstly the fundamental prin- ciples of the top-level modeling theory are decribed to expound the premise, assumptions, basic conventions and special require- ments in the description of complex heterogeneous systems. Next the formalized definitions for each factor in top level modeling are proposed and the hierarchical nature of them is illustrated. After demonstrating that they are self-closing, this paper divides the top- level modeling into two views, static structural graph and dynamic behavioral graph. Finally, a case study is discussed to demon- strate the feasibility of the theory.展开更多
Current orchestration and choreography process engines only serve with dedicate process languages.To solve these problems,an Event-driven Process Execution Model(EPEM) was developed.Formalization and mapping principle...Current orchestration and choreography process engines only serve with dedicate process languages.To solve these problems,an Event-driven Process Execution Model(EPEM) was developed.Formalization and mapping principles of the model were presented to guarantee the correctness and efficiency for process transformation.As a case study,the EPEM descriptions of Web Services Business Process Execution Language(WS-BPEL) were represented and a Process Virtual Machine(PVM)-OncePVM was implemented in compliance with the EPEM.展开更多
数字针织面料的虚拟仿真技术通过数字化手段模拟真实针织面料的纹理与物理特性,依托纹理和物理属性数据,结合计算机算法集成处理,精准再现织物风格。仿真过程借助虚拟服装模拟应用,展现面料的视觉效果和物理行为,实现全面特性还原。研...数字针织面料的虚拟仿真技术通过数字化手段模拟真实针织面料的纹理与物理特性,依托纹理和物理属性数据,结合计算机算法集成处理,精准再现织物风格。仿真过程借助虚拟服装模拟应用,展现面料的视觉效果和物理行为,实现全面特性还原。研究提出两种构建方式:一是Style-knit软件的独立设计工具,二是CLO 3D软件的针织面料模块。CLO 3D 2024版本创新推出针织服装模块,专注于针法结构建模,以高度逼真呈现针织外观效果。该模块通过模拟针织特有的网格状结构,提供精确的3D面料模拟,使设计更贴近实际针织工艺。基于物理的建模技术虽对算力要求较高,但确保了数字表现的逼真性与自然度,为用户带来较高真实感与细节表现力。展开更多
以北京市四惠枢纽为研究对象,探索以数据驱动为导向满足乘客需求的枢纽动态导向标识方案评估及优化设计方法。首先,搭建KANO乘客需求模型,通过桌面实验,形成动态导向标识在内容、样式及空间位置上的优化设计方案,与四惠枢纽现有方案形...以北京市四惠枢纽为研究对象,探索以数据驱动为导向满足乘客需求的枢纽动态导向标识方案评估及优化设计方法。首先,搭建KANO乘客需求模型,通过桌面实验,形成动态导向标识在内容、样式及空间位置上的优化设计方案,与四惠枢纽现有方案形成对比。其次,基于寻路理论通过建筑信息建模(building information modeling,BIM)+虚拟现实(virtual reality,VR)仿真技术,实现人与枢纽的信息交互,提取新旧导向标识方案作用下乘客寻路过程的特征参数。最后,通过对寻路实验中主客观指标分析可知,被试在新版动态导向标识方案中寻路时间、犯错误点数及迷茫点数显著降低,且新版动态导向标识方案在内容、样式及空间位置上满意度均优于旧版。结果表明:研究搭建BIM+VR的虚拟仿真平台,形成以数据驱动为导向的枢纽动态导向标识方案综合评估及优化设计方法,为枢纽动态导向标识方案设计及合理应用提供技术与理论支撑。展开更多
运用建筑信息模型(Building Information Modeling,BIM)技术,以北魏宣武帝景陵遗址为对象进行虚拟建构实验教学。针对外业信息采集、内业数据处理、建筑内部病害标记与汇总、BIM模型建构与虚拟修缮4个模块开展对学生仪器使用、数据处理...运用建筑信息模型(Building Information Modeling,BIM)技术,以北魏宣武帝景陵遗址为对象进行虚拟建构实验教学。针对外业信息采集、内业数据处理、建筑内部病害标记与汇总、BIM模型建构与虚拟修缮4个模块开展对学生仪器使用、数据处理、建筑病害整理和BIM建模方法等方面的对应训练。教学实践表明,结合建筑遗产实际项目的实验教学能够有效保障学生对于相关技术的理解与掌握,锻炼设备操作与课题研究能力,锤炼专业技能的同时进一步提升遗产保护意识、开拓遗产保护视野。展开更多
基金Project(50879077) supported by the National Natural Science Foundation of China
文摘A new approach is proposed to analyze the settlement behavior for single pile embedded in layered soils. Firstly, soil layers surrounding pile shaft are simulated by using distributed Voigt model, and finite soil layers under the pile end are assumed to be virtual soil-pile whose cross-section area is the same as that of the pile shaft. Then, by means of Laplace transform and impedance function transfer method to solve the static equilibrium equation of pile, the analytical solution of the displacement impedance fimction at the pile head is derived. Furthermore, the analytical solution of the settlement at the head of single pile is theoretically derived by virtue of convolution theorem. Based on these solutions, the influences of parameters of soil-pile system on the settlement behavior for single pile are analyzed. Also, comparison of the load-settlement response for two well-instrumented field tests in multilayered soils is given to demonstrate the effectiveness and accuracy of the proposed approach. It can be noted that the presented solution can be used to calculate the settlement of single pile for the preliminary design of pile foundation.
基金supported by the National High Technology Research and Development Program (863 Program) (2011AA040502).
文摘Multi-disciplinary virtual prototypes of complex products are increasingly and widely used in modern advanced manufactur- ing. How to effectively address the problems of unified modeling, composition and reuse based on the multi-disciplinary heteroge- neous models has brought great challenges to the modeling and simulation （M＆S） science and technology. This paper presents a top-level modeling theory based on the meta modeling framework （M2F） of the COllaborative SIMulation （COSlM） theory of virtual prototyping to solve the problems. Firstly the fundamental prin- ciples of the top-level modeling theory are decribed to expound the premise, assumptions, basic conventions and special require- ments in the description of complex heterogeneous systems. Next the formalized definitions for each factor in top level modeling are proposed and the hierarchical nature of them is illustrated. After demonstrating that they are self-closing, this paper divides the top- level modeling into two views, static structural graph and dynamic behavioral graph. Finally, a case study is discussed to demon- strate the feasibility of the theory.
文摘Current orchestration and choreography process engines only serve with dedicate process languages.To solve these problems,an Event-driven Process Execution Model(EPEM) was developed.Formalization and mapping principles of the model were presented to guarantee the correctness and efficiency for process transformation.As a case study,the EPEM descriptions of Web Services Business Process Execution Language(WS-BPEL) were represented and a Process Virtual Machine(PVM)-OncePVM was implemented in compliance with the EPEM.
文摘数字针织面料的虚拟仿真技术通过数字化手段模拟真实针织面料的纹理与物理特性,依托纹理和物理属性数据,结合计算机算法集成处理,精准再现织物风格。仿真过程借助虚拟服装模拟应用,展现面料的视觉效果和物理行为,实现全面特性还原。研究提出两种构建方式:一是Style-knit软件的独立设计工具,二是CLO 3D软件的针织面料模块。CLO 3D 2024版本创新推出针织服装模块,专注于针法结构建模,以高度逼真呈现针织外观效果。该模块通过模拟针织特有的网格状结构,提供精确的3D面料模拟,使设计更贴近实际针织工艺。基于物理的建模技术虽对算力要求较高,但确保了数字表现的逼真性与自然度,为用户带来较高真实感与细节表现力。
文摘以北京市四惠枢纽为研究对象,探索以数据驱动为导向满足乘客需求的枢纽动态导向标识方案评估及优化设计方法。首先,搭建KANO乘客需求模型,通过桌面实验,形成动态导向标识在内容、样式及空间位置上的优化设计方案,与四惠枢纽现有方案形成对比。其次,基于寻路理论通过建筑信息建模(building information modeling,BIM)+虚拟现实(virtual reality,VR)仿真技术,实现人与枢纽的信息交互,提取新旧导向标识方案作用下乘客寻路过程的特征参数。最后,通过对寻路实验中主客观指标分析可知,被试在新版动态导向标识方案中寻路时间、犯错误点数及迷茫点数显著降低,且新版动态导向标识方案在内容、样式及空间位置上满意度均优于旧版。结果表明:研究搭建BIM+VR的虚拟仿真平台,形成以数据驱动为导向的枢纽动态导向标识方案综合评估及优化设计方法,为枢纽动态导向标识方案设计及合理应用提供技术与理论支撑。
文摘运用建筑信息模型(Building Information Modeling,BIM)技术,以北魏宣武帝景陵遗址为对象进行虚拟建构实验教学。针对外业信息采集、内业数据处理、建筑内部病害标记与汇总、BIM模型建构与虚拟修缮4个模块开展对学生仪器使用、数据处理、建筑病害整理和BIM建模方法等方面的对应训练。教学实践表明,结合建筑遗产实际项目的实验教学能够有效保障学生对于相关技术的理解与掌握,锻炼设备操作与课题研究能力,锤炼专业技能的同时进一步提升遗产保护意识、开拓遗产保护视野。
