In daily life,human need various senses to obtain information about their surroundings,and touch is one of the five major human sensing signals.Similarly,it is extremely important for robots to be endowed with tactile...In daily life,human need various senses to obtain information about their surroundings,and touch is one of the five major human sensing signals.Similarly,it is extremely important for robots to be endowed with tactile sensing ability.In recent years,vision-based tactile sensing technology has been the research hotspot and frontier in the field of tactile perception.Compared to conventional tactile sensing technologies,vision-based tactile sensing technologies are capable of obtaining highquality and high-resolution tactile information at a lower cost,while not being limited by the size and shape of sensors.Several previous articles have reviewed the sensing mechanism and electrical components of vision-based sensors,greatly promoting the innovation of tactile sensing.Different from existing reviews,this article concentrates on the underlying tracking method which converts real-time images into deformation information,including contact,sliding and friction.We will show the history and development of both model-based and model-free tracking methods,among which model-based approaches rely on schematic mechanical theories,and model-free approaches mainly involve machine learning algorithms.Comparing the efficiency and accuracy of existing deformation tracking methods,future research directions of vision-based tactile sensors for smart manipulations and robots are also discussed.展开更多
Benefiting from advances in feature technology for design and manufacture can not be expected before a formal methodology is established. This paper makes attempt to establish a definition formalism of machining featu...Benefiting from advances in feature technology for design and manufacture can not be expected before a formal methodology is established. This paper makes attempt to establish a definition formalism of machining features in design for manufacturability from two aspects: formal definition and manufacturability analysis. Some definitions for machining feature based upon the selection and sequencing of material removal operations for component in accordance with the design geometry are presented and a framework of feature based design for manufacturability is outlined correspondingly. The proposed scheme contributes to several aspects of feature based CAD/CAM integration, especially to encourage potentially a more generic approach to the automation of design.展开更多
Nowadays, with the rapid development of science and technology, the traditional teaching mode is eliminated gradually, while the multimedia technology plays a more and more important role. Almost all schools are equip...Nowadays, with the rapid development of science and technology, the traditional teaching mode is eliminated gradually, while the multimedia technology plays a more and more important role. Almost all schools are equipped with multimedia. But how English teachers make good use of it, which is the problem need to solve. Firstly, it should explore and explicit state what is multimedia technology,what is the characteristics,and what is its advantages over traditional teaching mode.展开更多
This paper describes the multimedia technology applied to the safety monitoring, management dispatching and production commanding system in the coal mine, analyzes and studies the methods of compression hased on model...This paper describes the multimedia technology applied to the safety monitoring, management dispatching and production commanding system in the coal mine, analyzes and studies the methods of compression hased on model data. In the system a multimedia computer is used to control a subsystem of safety monitoring, a subsystem of attendance management. and a subsystem of industrial TV. The multimedia computer will process the information of graphs. texts, sounds, pictures and images etc. It has the functions of real-time monitoring, emergency rescuing and accident analyzing.展开更多
为降低配电变压器潜在风险,确保故障风险控制性能,设计基于模型的工程定义(model based definition,MBD)技术的配电变压器潜在故障风险控制系统。使用MBD技术描述系统主电路,根据模块化原则将系统划分为表示层、控制层、业务逻辑层和信...为降低配电变压器潜在风险,确保故障风险控制性能,设计基于模型的工程定义(model based definition,MBD)技术的配电变压器潜在故障风险控制系统。使用MBD技术描述系统主电路,根据模块化原则将系统划分为表示层、控制层、业务逻辑层和信息访问层,运用B/S结构实现系统硬件操作。使用Java开发语言,利用在线监测、风险评价指标、故障风险控制等板块搭建系统软件,引入事故链概念,计算配电变压器失稳及支路过载故障后果,根据核心决策节点,完成潜在故障风险控制。实验结果表明,设计系统具有较好的故障风险控制性能,有效降低配电变压器潜在风险,减小潜在故障风险控制延时。展开更多
基金supported by the National Key Research and Development of China(Grant No.2022YFB3805700)the National Natural Science Foundation of China(Grant Nos.12122202 and 12372162)the Fundamental Research Funds for the Central Universities(Grant No.2024CX06021).
文摘In daily life,human need various senses to obtain information about their surroundings,and touch is one of the five major human sensing signals.Similarly,it is extremely important for robots to be endowed with tactile sensing ability.In recent years,vision-based tactile sensing technology has been the research hotspot and frontier in the field of tactile perception.Compared to conventional tactile sensing technologies,vision-based tactile sensing technologies are capable of obtaining highquality and high-resolution tactile information at a lower cost,while not being limited by the size and shape of sensors.Several previous articles have reviewed the sensing mechanism and electrical components of vision-based sensors,greatly promoting the innovation of tactile sensing.Different from existing reviews,this article concentrates on the underlying tracking method which converts real-time images into deformation information,including contact,sliding and friction.We will show the history and development of both model-based and model-free tracking methods,among which model-based approaches rely on schematic mechanical theories,and model-free approaches mainly involve machine learning algorithms.Comparing the efficiency and accuracy of existing deformation tracking methods,future research directions of vision-based tactile sensors for smart manipulations and robots are also discussed.
文摘Benefiting from advances in feature technology for design and manufacture can not be expected before a formal methodology is established. This paper makes attempt to establish a definition formalism of machining features in design for manufacturability from two aspects: formal definition and manufacturability analysis. Some definitions for machining feature based upon the selection and sequencing of material removal operations for component in accordance with the design geometry are presented and a framework of feature based design for manufacturability is outlined correspondingly. The proposed scheme contributes to several aspects of feature based CAD/CAM integration, especially to encourage potentially a more generic approach to the automation of design.
文摘Nowadays, with the rapid development of science and technology, the traditional teaching mode is eliminated gradually, while the multimedia technology plays a more and more important role. Almost all schools are equipped with multimedia. But how English teachers make good use of it, which is the problem need to solve. Firstly, it should explore and explicit state what is multimedia technology,what is the characteristics,and what is its advantages over traditional teaching mode.
文摘This paper describes the multimedia technology applied to the safety monitoring, management dispatching and production commanding system in the coal mine, analyzes and studies the methods of compression hased on model data. In the system a multimedia computer is used to control a subsystem of safety monitoring, a subsystem of attendance management. and a subsystem of industrial TV. The multimedia computer will process the information of graphs. texts, sounds, pictures and images etc. It has the functions of real-time monitoring, emergency rescuing and accident analyzing.
文摘为降低配电变压器潜在风险,确保故障风险控制性能,设计基于模型的工程定义(model based definition,MBD)技术的配电变压器潜在故障风险控制系统。使用MBD技术描述系统主电路,根据模块化原则将系统划分为表示层、控制层、业务逻辑层和信息访问层,运用B/S结构实现系统硬件操作。使用Java开发语言,利用在线监测、风险评价指标、故障风险控制等板块搭建系统软件,引入事故链概念,计算配电变压器失稳及支路过载故障后果,根据核心决策节点,完成潜在故障风险控制。实验结果表明,设计系统具有较好的故障风险控制性能,有效降低配电变压器潜在风险,减小潜在故障风险控制延时。
