基于USRP的AIS接收机实现     

郭志恒  曾柏华  洪金城  陈翔  刘敏 《实验室研究与探索》2020,(3):93-97,154

船舶AIS是集海上船舶识别、安全监控和通信导航功能为一体的新型数字助航系统,其在甚高频上采用SOTDMA方式实现船舶动态、静态及其他相关信息收发,以确保船舶的检测与识别功能。使用USRP对AIS的船载终端进行设计与实现,以国家GB/T20068-2006标准规范为基础,完成了基于LabVIEW语言的AIS软件无线电接收机。在该接收机中,采用了两步频偏估计校正方法,有效克服了USRP平台的频率稳定度不足的缺点,并最终实现了船舶AIS信息接收、报文解析、数据库存储;同时通过在LabVIEW中嵌入开源的GIS与航海图,实现了对珠江上航行船舶的定位与可视化。该设计案例为URSP平台在“通信原理实验”及“通信系统设计”相关课程中的进一步推广使用提供了非常好的应用案例。  相似文献   

Does social justice count? ‘Lived democracy’ in mathematics classes in diverse Swedish upper secondary programmes     

Carina Hjelmér  Per-Åke Rosvall 《课程研究杂志》2017,49(2):216-234

This article analyses what students attending four Swedish upper secondary school programmes with different social class profiles tried and wanted to influence in relation to mathematics teachers’ pedagogic practice and responses during the year 2008/2009. The theoretical framework is based on Bernstein’s theories regarding power and control. The analyses draw on ethnographic observations of classes taking the Natural Science and Social Science academic programmes, and the Vehicle and Child and Recreation vocational programmes, at two Swedish upper secondary schools. Students attending different programmes tried to influence the teaching. However, what the students taking the academic and vocational programmes were able to influence considerably differed. Generally, the vocational students exerted influence more successfully when they wanted to reduce the pace and difficulty of teaching, than when they wished to get more out of their education, while the opposite applied to the academic, especially Natural Science, students. Thus, the power relations reflected the programmes’ social class profiles and the students’ expected positions in society, despite policies at the time to promote democracy and reduce social reproduction in education. The findings support the importance of analysing not only students’ voices, but also their voices in relation to the pedagogic practice they encounter.  相似文献   

新疆地区残疾儿童随班就读现状及发展设想的一点思考     

沈明泓 《中国特殊教育》2004,(7)

本论文试图通过对新疆地区残疾儿童随班就读现状的初步探索 ,试图找出影响新疆残疾儿童随班就读发展的根本原因 ,并根据新疆的具体区情谈谈发展新疆地区残疾儿童随班就读的初步设想。  相似文献   

教师参与高校决策:合理性及其限度性     

尹晓敏 《教育科学》2006,22(5):68-70

作为高校实施民主管理的重要举措,教师参与高校决策的合理性表现在诸多方面。然而,合理性的证成并不意味参与的多多益善,因为缺失限度的教师参与背离于高校的决策理性化。基于此,我们认为高校应当通过对参与教师和参与事项的适当选择为教师的决策参与设定合理的边界与限度。  相似文献   

参与式扶贫与政府角色转换     

陈华平 《赣南师范学院学报》2006,27(1):113-116

“参与式”扶贫是建立一种公众参与扶贫的行政过程的机制,它通过“赋权”的方式,使公众能介入扶贫项目的决策、实施、监督过程,提高扶贫的行为的可持续性,体现“参与过程就是村民素质提高的过程”。赣南参与式扶贫的实践表明,村民参与受多种因素影响,既有自身的原因又受客观条件的制约,因此,建立和完善参与式扶贫机制,政府角色转换是关键。  相似文献   

贵州参与式乡村旅游发展研究——以郎德、天龙屯堡、镇山村参与式乡村旅游发展模式为例   总被引：1，自引：0，他引：1  

李乐京  陈志永  吴亚平 《贵州教育学院学报》2007,18(2):97-101

分析了贵州乡村旅游发展状况,提出了贵州发展参与式乡村旅游的意义,并通过比较天龙屯堡、郎德苗寨、镇山村等乡村旅游模式,探讨贵州参与式乡村旅游存在的不足,以及促进参与式乡村旅游发展的思路。  相似文献   

论协商民主在政治决策中的功能     

蔡宇宏  刘秀华 《襄樊学院学报》2007,28(3):27-30

政治决策是社会主义民主政治的重要内容，协商民主对政治决策的发展和完善有重要意义，主要体现在：为政治决策提供“和而不同”的人民利益的价值取向；为政治决策提供公开化的信息和民意；为政治决策提供自由平等的民主参与；为政治决策提供合法性基础上的责任性。  相似文献   

印度的政治体制与政治稳定     

李云霞  王洪岩 《石家庄学院学报》2007,9(5):5-10

二战结束后,印度建立了议会民主的政治体制。独立60年来,印度在政治上保持了基本的稳定,已经逐渐形成了比较稳固的政治体制。但是现代政治体制与传统社会结构的矛盾也使其政治发展波折不断,而印度的现代政治体制则发挥了政治稳定的功能,保持了其资本主义经济、政治制度的稳固性,这在动辄发生军事政变甚至流血冲突的发展中国家中是不多见的。总体而言,印度民主政治的发展和运作是比较成功的。  相似文献   

Place-based education from three perspectives     

Jan Cincera  Barbora Valesova  Sarka Krepelkova  Petra Simonova  Roman Kroufek 《Environmental Education Research》2019,25(10):1510-1523

Abstract

This article examines the perception of the Czech place-based education program School for Sustainable Development from the perspectives of the participating students, teachers, and representatives of the local municipalities. The study is based on an analysis of paired or group interviews with 47 students, 7 teachers, and 6 representatives. The findings show that while the teachers perceived the process of the students’ involvement in planning and conducting a community-based project as highly participative, the students’ opportunities to shape the process through making their own decisions were rather limited and the teachers kept control over important parts of the process to themselves. While the cooperation of the schools with their respective municipalities was appreciated by most of the respondents, several barriers have been identified. Participation in the project has likely increased the teachers’ self-effectiveness, developed the students’ interpersonal competence, and improved the atmosphere at the schools involved.

Abbreviations: PBE: place-based education; ENEC: European Network for Environmental Citizenship; STEM: Science, Technology, Engineering and Mathematics; SSD: The School for Sustainable Development.  相似文献   

多中心治理语境下的社区参与:行动者的缺席与复归     

吴小建 《安徽广播电视大学学报》2012,(2):7-10

社区参与是实现社区民主治理的本质要求,制度的变革为社区参与提供了可能性。但目前社区参与存在参与意识薄弱、参与主体不够广泛、参与内容不深入和参与方式陈旧等参与不足的问题,社区参与中行动者缺席的原因是多重的,基于多中心治理理论,提出通过培育社区参与意识、强化社区自治功能、完善社区参与机制和注重社区主体利益需求等措施,复归社区参与中的行动者。  相似文献