[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fXxkMgV2SR9Hfby4XukMu_rZqzyaACc286xPojF-BdYM":3},{"id":4,"source":5,"question":6,"options":7,"answer":12,"related":13,"type":18,"origin":111,"createTime":20},51459216,"v1","下面关于时间同步的说法,正确的是",[8,9,10,11],"两个节点完成时间同步后,就无需再次时间同步","节点间的时间同步,需反复进行","偏移同步是时间同步的最低要求","偏移同步用于让各个节点本地时间速率相同",[],[14,21,31,41,51,61,71,81,91,101],{"id":4,"source":5,"question":6,"options":15,"answer":16,"related":17,"type":18,"origin":19,"createTime":20},[8,9,10,11],[],[],0,null,"2023-06-07T18:08:09+08:00",{"id":22,"source":5,"question":23,"options":24,"answer":29,"related":30,"type":18,"origin":19,"createTime":20},51459217,"下面关于晶振的说法,正确的是",[25,26,27,28],"同一批出厂的晶振,无需进行时间同步","同一块晶振,任意环境下振动频率都是一样的","晶振的振动频率会随环境变化","晶振比原子钟更精准",[],[],{"id":32,"source":5,"question":33,"options":34,"answer":39,"related":40,"type":18,"origin":19,"createTime":20},51459218,"下面关于时间同步误差来源的说法,正确的是",[35,36,37,38],"协议发送时延无法消除","接入时延是指抢占信道造成的时延","发送时延通常是不确定的","即时没有技术手段消除,接入时延也可以忽略不计",[],[],{"id":42,"source":5,"question":43,"options":44,"answer":49,"related":50,"type":18,"origin":19,"createTime":20},51459219,"下面关于时间同步说法错误的是",[45,46,47,48],"单向报文传递指一个节点收到另一个节点的时间戳,就立即进行同步","双向报文传递指一个节点收到另一个节点的同步报文,会立即向另一个节点发送应答报文","单向报文传递的精度高于双向报文","双向报文传递,会增大网络负荷",[],[],{"id":52,"source":5,"question":53,"options":54,"answer":59,"related":60,"type":18,"origin":19,"createTime":20},51459220,"下面关于LTS时间同步算法,说法正确的是",[55,56,57,58],"这是一种单向报文交换的时间同步算法","集中式LTS算法需要先构建树","所有节点同时和根节点进行时间同步","父节点下面的子节点,会同时和父节点进行时间同步",[],[],{"id":62,"source":5,"question":63,"options":64,"answer":69,"related":70,"type":18,"origin":19,"createTime":20},51459221,"RBS时间同步,可以消除哪些误差来源",[65,66,67,68],"协议发送时延","传播延时","接收延时","接收处理时延",[],[],{"id":72,"source":5,"question":73,"options":74,"answer":79,"related":80,"type":18,"origin":19,"createTime":20},51459222,"下面关于TPSN时间同步算法,说法错误的是",[75,76,77,78],"需要先建立一个层级拓扑","采用两两成对时间同步","在MAC层占用了信道后,才加上时间戳","无法消除协议发送时延",[],[],{"id":82,"source":5,"question":83,"options":84,"answer":89,"related":90,"type":18,"origin":19,"createTime":20},51459223,"关于DMTS时间同步算法,说法错误的是",[85,86,87,88],"采用双向同步机制","在检测到信道空闲后,才将时间戳加入报文","可以排除协议发送时延","可以排除接入时延",[],[],{"id":92,"source":5,"question":93,"options":94,"answer":99,"related":100,"type":18,"origin":19,"createTime":20},51459224,"下面关于无线传感器网络的定位技术,说法正确的是",[95,96,97,98],"只需要解决对自己的定位即可","有时需要完成对目标的定位","卫星定位是一种廉价的定位方法","定位技术必须能够获得精确的经纬度",[],[],{"id":102,"source":5,"question":103,"options":104,"answer":109,"related":110,"type":18,"origin":19,"createTime":20},51459225,"下面关于无线传感器网络定位技术,说法正确的是",[105,106,107,108],"无需测距的定位技术精度一般可以达到需测距的定位技术","RSSI测距技术是指基于信号强度的测距技术","RSSI测距技术的精度很高","节点各自计算自己的位置,是一种集中式定位技术",[],[],{"courseName":112,"courseImg":113,"workName":114,"workId":115,"count":116,"courseId":117},"无线传感器网络","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdbb4a540b579cc8d5e5cdd2593af06c6.jpg","第四章定位、时间同步作业作业","work_28072769",13,"ff8dbe635ba39c4fd3629023d6fba977"]