设计了一种通过颜色识别技术与超声波测距技术进行目标检测和跟踪的无人机目标跟踪系统。采用Arduino Mega 2560为主控板,利用Pixy2视觉识别传感器模块、超声波模块HC-SR04作为跟踪目标信息采集装置与四旋翼无人机机体共同构成系统的硬...设计了一种通过颜色识别技术与超声波测距技术进行目标检测和跟踪的无人机目标跟踪系统。采用Arduino Mega 2560为主控板,利用Pixy2视觉识别传感器模块、超声波模块HC-SR04作为跟踪目标信息采集装置与四旋翼无人机机体共同构成系统的硬件部分。开发了应用视觉识别与超声波信息控制无人机进行自动跟踪的控制程序。实验结果显示,使用Pixy2传感器模块可以识别多种形状和颜色的目标物体,而超声波模块辅助识别增加了系统识别的精准性,无人机可以根据所获得的数据进行目标物体的识别与跟踪,具有较好的智能性、实时性和准确性,实现了无人机准确识别、锁定被测物体的位置,并控制机体进行自主移动跟踪。展开更多
Ralph Waldo Emerson, born in 19th century's America, is most famous for his transcendental ideas and writings. He was deeply influenced by European Romanticism in his thirties and formed an informal Transcendental...Ralph Waldo Emerson, born in 19th century's America, is most famous for his transcendental ideas and writings. He was deeply influenced by European Romanticism in his thirties and formed an informal Transcendental Club with people of like minds. His thought is often considered the core of Transcendentalism. "Nature" is the fundamental document of his philosophy and an embodiment of his transcendental attitude towards the phenomenal world. He also wrote some other brilliant essays such as "The American Scholar", "Self-Reliance", "The Over-Soul" and "The Poet", etc, all of which established his indisputable position in the history of culture, especially in the American Culture where he is regarded as the one who, in literally terms at least, really put America on map. But considering Emerson's writings without significant emphasis on his verse would be a great loss. Emerson wrote poetry from the time he was a boy to nearly the end of his life. These poems are essential for understanding him and his transcendental theories and are receiving more extensive representation in anthologies while significant critical analyses are emerging though some modern readers and scholars tend to view his poetry as secondary to the "essential" Emerson. In view of the above, this paper supposes to introduce Emerson's views on poets and poems and then analyze some of his famous poems in the order of 'Emerson as a Poet', 'Emerson's Views on Poets and Poems' and 'Emerson's Poems' with the third one as the focus of this paper. The purpose of this paper is to try to make the comprehension on Emerson and his abstract transcendental theories more complete and thorough by emphasizing his contribution in the poetic field.展开更多
在教学方法改革中,以问题为基础的学习(Problem-basedlearning,PBL)是近年引起人们极大兴趣并较多采用的一种新型学习方式。随着社会的高速发展,我国高校发生了巨大的变化,如高等教育持续扩招、跨校区资源共享等,这些变化既给高校注入...在教学方法改革中,以问题为基础的学习(Problem-basedlearning,PBL)是近年引起人们极大兴趣并较多采用的一种新型学习方式。随着社会的高速发展,我国高校发生了巨大的变化,如高等教育持续扩招、跨校区资源共享等,这些变化既给高校注入了新活力,同时又带来校区人口密集,校园更加开放、学生活动空间大大向外延伸等新问题,给高校防范各类意外伤害事件带来了新挑战。笔者应用PBL原理,根据应急救护的实际,设计并实施了以案例调查和讨论为引导教学(Case Based Study CBS)的教育方式。案例调查和讨论前大学生有关防范各类意外伤害知识比较贫乏,一些不利于防范各类意外伤害的理念和行为普遍存在,经案例调查和讨论后大学生参与学习有关防范各类意外伤害知识和技能的主动性明显提高,调查和讨论前学生防范各类意外伤害知识和技能的知晓及掌握率分别为9.7%和0.87%;调查和讨论后防范各类意外伤害知识和技能的知晓及掌握率分别为86.0%和96.7%;78.8%的学生主要通过大众传媒获取卫生保健知识。通过对816名学生进行的问卷调查表明,CBS能激发学生学习兴趣,提高学生掌握急救知识和技能进行主动性学习的效果。展开更多
文摘设计了一种通过颜色识别技术与超声波测距技术进行目标检测和跟踪的无人机目标跟踪系统。采用Arduino Mega 2560为主控板,利用Pixy2视觉识别传感器模块、超声波模块HC-SR04作为跟踪目标信息采集装置与四旋翼无人机机体共同构成系统的硬件部分。开发了应用视觉识别与超声波信息控制无人机进行自动跟踪的控制程序。实验结果显示,使用Pixy2传感器模块可以识别多种形状和颜色的目标物体,而超声波模块辅助识别增加了系统识别的精准性,无人机可以根据所获得的数据进行目标物体的识别与跟踪,具有较好的智能性、实时性和准确性,实现了无人机准确识别、锁定被测物体的位置,并控制机体进行自主移动跟踪。
文摘Ralph Waldo Emerson, born in 19th century's America, is most famous for his transcendental ideas and writings. He was deeply influenced by European Romanticism in his thirties and formed an informal Transcendental Club with people of like minds. His thought is often considered the core of Transcendentalism. "Nature" is the fundamental document of his philosophy and an embodiment of his transcendental attitude towards the phenomenal world. He also wrote some other brilliant essays such as "The American Scholar", "Self-Reliance", "The Over-Soul" and "The Poet", etc, all of which established his indisputable position in the history of culture, especially in the American Culture where he is regarded as the one who, in literally terms at least, really put America on map. But considering Emerson's writings without significant emphasis on his verse would be a great loss. Emerson wrote poetry from the time he was a boy to nearly the end of his life. These poems are essential for understanding him and his transcendental theories and are receiving more extensive representation in anthologies while significant critical analyses are emerging though some modern readers and scholars tend to view his poetry as secondary to the "essential" Emerson. In view of the above, this paper supposes to introduce Emerson's views on poets and poems and then analyze some of his famous poems in the order of 'Emerson as a Poet', 'Emerson's Views on Poets and Poems' and 'Emerson's Poems' with the third one as the focus of this paper. The purpose of this paper is to try to make the comprehension on Emerson and his abstract transcendental theories more complete and thorough by emphasizing his contribution in the poetic field.
文摘在教学方法改革中,以问题为基础的学习(Problem-basedlearning,PBL)是近年引起人们极大兴趣并较多采用的一种新型学习方式。随着社会的高速发展,我国高校发生了巨大的变化,如高等教育持续扩招、跨校区资源共享等,这些变化既给高校注入了新活力,同时又带来校区人口密集,校园更加开放、学生活动空间大大向外延伸等新问题,给高校防范各类意外伤害事件带来了新挑战。笔者应用PBL原理,根据应急救护的实际,设计并实施了以案例调查和讨论为引导教学(Case Based Study CBS)的教育方式。案例调查和讨论前大学生有关防范各类意外伤害知识比较贫乏,一些不利于防范各类意外伤害的理念和行为普遍存在,经案例调查和讨论后大学生参与学习有关防范各类意外伤害知识和技能的主动性明显提高,调查和讨论前学生防范各类意外伤害知识和技能的知晓及掌握率分别为9.7%和0.87%;调查和讨论后防范各类意外伤害知识和技能的知晓及掌握率分别为86.0%和96.7%;78.8%的学生主要通过大众传媒获取卫生保健知识。通过对816名学生进行的问卷调查表明,CBS能激发学生学习兴趣,提高学生掌握急救知识和技能进行主动性学习的效果。
