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光调控的叶绿体运动研究进展 被引量:4
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作者 乔新荣 张凯 肖颖 《河南农业科学》 CSCD 北大核心 2014年第2期1-5,共5页
光可诱导植物叶绿体运动,从而适应环境变化。近年来研究发现,蓝光受体向光素(phototropin,PHOT)参与蓝光诱导的叶绿体运动。弱蓝光下,PHOT1和PHOT2以功能冗余方式介导叶绿体聚集运动;强蓝光下,PHOT2单独介导叶绿体回避运动。PHOT可能通... 光可诱导植物叶绿体运动,从而适应环境变化。近年来研究发现,蓝光受体向光素(phototropin,PHOT)参与蓝光诱导的叶绿体运动。弱蓝光下,PHOT1和PHOT2以功能冗余方式介导叶绿体聚集运动;强蓝光下,PHOT2单独介导叶绿体回避运动。PHOT可能通过多种不同的信号途径调节肌动蛋白的运动,从而实现对叶绿体运动速率的调控。此外,Ca2+和H2O2信号分子也参与叶绿体运动的调节。主要综述了介导叶绿体运动的蓝光受体PHOT及信号成分CHUP1、KAC、JAC1、WEB1、THRUMIN1等蛋白对肌动蛋白微丝的调节,并对该领域今后的研究方向进行了展望。 展开更多
关键词 叶绿体 向光素 肌动蛋白微丝 聚集运动 回避运动
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Fuzzy Logic Control of a Robotic Manipulator for Obstacles Avoidance 被引量:1
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作者 Nabeel Kadim Abid Al-Sahib Israa Rafie Shareef 《Journal of Mechanics Engineering and Automation》 2012年第1期9-16,共8页
This work presents a Fuzzy Logic Controller (FLC) assigned to control a robotic arm motion while avoiding the obstacles that may face the robotic arm in its movement from the initial point to the final point in an o... This work presents a Fuzzy Logic Controller (FLC) assigned to control a robotic arm motion while avoiding the obstacles that may face the robotic arm in its movement from the initial point to the final point in an optimized manner, in addition to avoid the singularity phenomenon, and without any exceeding of the physical constraints of the robot arm. A real platform (5 DOF "Degree Of Freedom" Lab Volt 5150 Robotic Arm) is used to carry this work practically, in addition to providing it by a vision sensor, where a new approach is proposed to inspect the robot work environment using a designed integrated MATLAB program having the ability to recognize the changeable locations of each of the robotic arm's end-effector, the goal, and the multi existed obstacles through a recorded film taken by a webcam, then these information will be treated using the FLC where its outputs represent the values that must be delivered to the robot to adopt them in its next steps till reaching to the goal in collision-free movements. The experimental results showed that the developed robotic ann travels successfully from Start to Goal where a high percentage of accuracy in arriving to Goal was achieved, and without colliding with any obstacle ensuring the harmonization between the theoretical part and the experimental part in achieving the best results of controlling the robotic arm's motion. 展开更多
关键词 Robotic manipulator fuzzy logic controller obstacles avoidance.
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