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COLLISION AVOIDANCE DECISION-MAKING MODEL OF MULTI-AGENTS IN VIRTUAL DRIVING ENVIRONMENT WITH ANALYTIC HIERARCHY PROCESS

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Chinese Journal of Mechanical Engineering 2008年第1期21卷 47-52页

作者： LU Hong yi guodong TAN Jianrong LIU Zhenyu State Key Laboratory of CAD＆CG Zhejiang University Hangzhou 310027 China 3D Technology Co. Ltd Ningbo 315040 China

Collision avoidance decision-making models of multiple agents in virtual driving environment are studied. Based on the behavioral characteristics and hierarchical structure of the collision avoidance decision-making in real life driving, delphi approach and mathematical statistics method are introduced to construct pair-wise comparison judgment matrix of collision avoidance decision choices to each collision situation. Analytic hierarchy process （AHP） is adopted to establish the agents＇ collision avoidance decision-making model. To simulate drivers＇ characteristics, driver factors are added to categorize driving modes into impatient mode, normal mode, and the cautious mode. The results show that this model can simulate human＇s thinking process, and the agents in the virtual environment can deal with collision situations and make decisions to avoid collisions without intervention. The model can also reflect diversity and uncertainly of real life driving behaviors, and solves the multi-objective, multi-choice ranking priority problem in multi-vehicle collision scenarios. This collision avoidance model of multi-agents model is feasible and effective, and can provide richer and closer-to-life virtual scene for driving simulator, reflecting real-life traffic environment more truly, this model can also promote the practicality of driving simulator.

关键词： Analytic hierarchy process (AHP) Collision avoidance Decision-making model Driving simulator Virtual driving environment Agent Driving behavior

REVERSE DESIGN APPROACH FOR MECHANISM TRAJECTORY BASED ON CODE-CHAINS MATCHING

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Chinese Journal of Mechanical Engineering 2007年第3期20卷 86-90页

作者： ZHANG Shuyou yi guodong XU Xiaofeng State Key Laboratory of CAD＆CG Zhejiang University Hangzhou 310027 China

Aiming at the problem of reverse-design of mechanism, a method based on the matching of trajectory code-chains is presented. The motion trajectory of mechanism is described with code-chain, which is normalized to simplify the operation of geometric transformation. The geometric transforma-tion formulas of scale, mirror and rotation for trajectory code-chain are defined, and the reverse de-sign for mechanism trajectory is realized through the analysis and solution of similarity matching between the desired trajectory and the predefined trajectory. The algorithm program and prototype system of reverse design for mechanism trajectory are developed. Application samples show that the method can break the restriction of trajectory patterns in matching, meet the demand of partial match-ing, and overcome the influence of geometric transformation of trajectory on the reverse design for mechanism.

关键词： Trajectory Code-chain Similarity matching Reverse-design

Data-driven modeling method with reverse process

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International Journal of Modeling, Simulation, and Scientific Computing 2022年第2期13卷 16-29页

作者： guodong yi Lifan yi Zaizhao Zhang Chuihui Li State Key Laboratory of Fluid Power&Mechatronic SystemsZhejiang University Hangzhou 310027P.R.China Xiangyang Boya Precision Industrial Equipment Co. Ltd.China

The factors that affect the performance of the equipment are numerous and complicated,which makes it difficult to establish a performance calculation *** paper puts forward a data-driven modeling method with reverse process for this *** on the partial least squares(PLS)algorithm and the gray relational analysis(GRA)method,the analysis method of the performance related factors,the extraction method of characteristic variables,and the performance modeling method are *** related factors of the energy consumption of an industrial steam turbine are analyzed,and an energy consumption calculation model is established,and the effectiveness of the above-mentioned modeling methods is verified with sample data,which provides a basis for the energy-saving optimization of the steam turbine.

关键词： Data-driven reverse process PLS GRA

CONCEPTUAL MODELING BASED ON LOGICAL EXPRESSION AND EVOLVEMENT

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维普期刊数据库

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Chinese Journal of Mechanical Engineering 2007年第1期20卷 64-68页

作者： yi guodong ZHANG Shuyou TAN Jianrong JI Yangjian State Key Laboratory of CAD ＆ CG Zhejiang University Hangzhou 310027 China

Aiming at the problem of abstract and polytype information modeling in product conceptual design, a method of conceptual modeling based on logical expression and evolvement is presented. Based on the logic expressions of the product conceptual design information, a fimction/logic/strucmre mapping model is set up. First, the fimction semantics is transformed into logical expressions through fimction/logic mapping. Second, the methods of logical evolvement are utilized to describe the fimction analysis, fimction/strucmre mapping and structure combination. Last, the logical structure scheme is transformed into geometrical sketch through logic/structure mapping. The conceptual design information and modeling process are described uniformly with logical methods in the model, and an effective method for computer aided conceptual design based on the model is implemented.

关键词： Conceptual modeling Function/logic/structure mapping Logical evolvement

Plastering mud around the entrance hole affects the estimation of threat levels from nest predators in Eurasian Nuthatches

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Avian Research 2021年第4期12卷 658-663页

作者： Jiangping Yu Li Zhang guodong yi Keqin Zhang Jiyuan Yao Jian Fang Chao Shen Haitao Wang Jilin Engineering Laboratory for Avian Ecology and Conservation Genetics School of Life SciencesNortheast Normal UniversityChangchun 130024China School of Life Sciences Jilin Normal UniversitySiping 136000China School of Zoological Science Jilin Agricultural Science and Technology UniversityJilin 132109China College of Animal Science and Technology Jilin Agricultural UniversityChangchun 130118China Jilin Key Laboratory of Animal Resource Conservation and Utilization Northeast Normal UniversityChangchun 130024China

Background:For cavity-nesting birds,the nest entrance plays an important role in preventing predators from accessing *** species of nuthatches use mud to narrow the entrance of *** theory,the smaller the entrance hole size,the more effective it is against predators;however,few studies have tested whether narrowing the entrance hole size can affect the estimation of threat levels from nest predators in cavity-nesting ***:Using dummy experiments,we tested whether Eurasian Nuthatches(Sitta europaea,narrow the entrance hole of cavities)and Cinereous Tits(Parus cinereus,do not narrow the entrance hole,as a control)perform different nest defence behaviours against Common Chipmunks(Tamias sibiricus,small nest predator)and Red Squirrels(Sciurus vulgaris,larger nest predator).Results:Both nuthatches and tits exhibited stronger response behaviours(high dummy response scores)against chipmunks than against *** with tits,nuthatches exhibited more aggressive behaviours to chipmunks,but their responses to squirrels were ***:Nest defence behaviours of nuthatches to chipmunks differed from tits,and the results suggested that nuthatches might estimate threat levels of nest predators according to their narrowed entrance-hole size.

关键词： Cavity-nesting birds Entrance-hole size Eurasian Nuthatches Nest defence behaviour Nest predator

面向产品开发过程的动态知识关联与导航技术研究

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中国机械工程 2008年第19期19卷 2329-2334页

作者：陈婧张树有伊国栋浙江大学CAD&CG国家重点实验室杭州310027

为实现知识对产品设计过程的支持,提高产品开发效率与质量,提出了面向产品开发过程的知识关联与导航方法。根据设计知识级综合采用不同的表示方法,将知识由静态描述拓展到动态领域,通过特征索引匹配进行设计知识与设计过程的动态关联,... 详细信息

为实现知识对产品设计过程的支持,提高产品开发效率与质量,提出了面向产品开发过程的知识关联与导航方法。根据设计知识级综合采用不同的表示方法,将知识由静态描述拓展到动态领域,通过特征索引匹配进行设计知识与设计过程的动态关联,实现产品开发过程的知识导航。构建了面向产品设计的知识管理平台,并在低压电器产品开发中得到了应用验证。

关键词：知识管理过程知识知识关联知识导航

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基于模糊多属性决策的复杂产品配置方法

机械工程学报 2010年第19期46卷 108-116页

作者：任彬张树有伊国栋浙江大学流体传动及控制国家重点实验室杭州310027

目前产品配置设计主要是标准模块基础上的功能实现,针对模糊型复杂产品的配置问题,将模糊多属性决策理论引入到配置设计方法中。考虑客户主观不确定偏好,通过模糊需求的知识获取以及模糊需求与产品属性间的描述,实现客户模糊需求到配置... 详细信息

目前产品配置设计主要是标准模块基础上的功能实现,针对模糊型复杂产品的配置问题,将模糊多属性决策理论引入到配置设计方法中。考虑客户主观不确定偏好,通过模糊需求的知识获取以及模糊需求与产品属性间的描述,实现客户模糊需求到配置需求的非线性映射。将配置需求作为复杂产品模糊层次配置的输入,通过非标准模块的相似性标识和模糊层次配置的求解,实现复杂产品模糊层次配置设计,模糊层次配置的输出为配置方案集。利用神经网络技术建立模糊多属性决策的配置方案评价模型,对配置方案集进行比较和排序,优选出最接近客户满意的配置结果。结合注塑机产品的配置设计,分析客户需求的模糊、不足和冗余问题,在第一层精确配置和第二层模糊相似配置的基础上,获得四个配置方案集,通过模糊神经网络的多属性决策模型,求解最优方案,并开发了注塑机配置设计系统。

关键词：复杂产品模糊多属性决策配置需求神经网络技术

萝卜硫素对H2O2诱导人肝细胞氧化应激损伤模型的保护作用

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中国组织工程研究 2020年第31期24卷 5052-5056页

作者：谭静易国栋恩施土家族苗族自治州中心医院肾病风湿科湖北省恩施市445000 恩施土家族苗族自治州中心医院消化内科湖北省恩施市445000

背景:氧化应激损伤在慢性肝炎发生发展中起着重要的作用,而天然产物萝卜硫素具有较好的抗氧化活性。目的:研究萝卜硫素对H2O2诱导人肝细胞(LO2)氧化应激损伤的保护作用,并探讨其可能的作用机制。方法:体外培养LO2细胞,采用H2O2诱导LO2... 详细信息

背景:氧化应激损伤在慢性肝炎发生发展中起着重要的作用,而天然产物萝卜硫素具有较好的抗氧化活性。目的:研究萝卜硫素对H2O2诱导人肝细胞(LO2)氧化应激损伤的保护作用,并探讨其可能的作用机制。方法:体外培养LO2细胞,采用H2O2诱导LO2细胞造模,并同时将细胞分为对照组、H2O2诱导组、H2O2+低剂量萝卜硫素组(10μmol/L)、H2O2+中剂量萝卜硫素组(20μmol/L)及H2O2+高剂量萝卜硫素组(40μmol/L)。采用100μg/L的H2O2处理人肝细胞24 h,诱导细胞氧化应激损伤;H2O2+萝卜硫素组将H2O2与不同浓度萝卜硫素同时处理细胞24 h。采用CCK8法分析萝卜硫素对细胞存活率的影响,分析细胞匀浆中的氧化应激产物水平,Western Blot法分析Nrf2、GCLC、NQO1及血红素加氧酶1蛋白表达水平。研究方案的实施符合恩施土家族苗族自治州中心医院的相关伦理要求。结果与结论:①H2O2能诱导LO2细胞氧化应激损伤;②相比于H2O2模型组,各浓度萝卜硫素能诱导LO2细胞增殖、抑制丙二醛和一氧化氮的产生及促使超氧化物歧化酶活性升高(P<0.05);③Western Blot结果显示萝卜硫素能诱导Nrf2向细胞核内转移,诱导GCLC、NQO1和血红素加氧酶1蛋白表达(P<0.05);④结果说明,萝卜硫素能改善H2O2诱导的LO2细胞氧化应激损伤,其药理学作用与Nrf2信号传导活化有关。

关键词：萝卜硫素人肝细胞氧化应激血红素加氧酶1 核因子E2相关因子2 蛋白

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零件结构的联动式进化设计方法

机械工程学报 2006年第1期42卷 40-46页

作者：冯毅雄谭建荣伊国栋浙江大学CAD&CG国家重点实验室杭州310027

零件结构是几何元素与附着于几何元素之上设计意图的综合体,如何有效地实现两者统一表示是零件结构进化设计技术研究的一个重要问题。在以联结单元定义实现结构联结约束抽象表达基础上,采用联结语义关联图给出面向进化设计的零件结构模... 详细信息

零件结构是几何元素与附着于几何元素之上设计意图的综合体,如何有效地实现两者统一表示是零件结构进化设计技术研究的一个重要问题。在以联结单元定义实现结构联结约束抽象表达基础上,采用联结语义关联图给出面向进化设计的零件结构模型表示,提出了面向过程进化的联结单元运算操作方法,将进化运算和结构进化模型重构的联动式进化算法相结合,实现零件结构进化模型动态编辑。

关键词：进化设计联动式进化联结语义结构建模创新设计