[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fkGca6_facusqEjI049nDBDgR8BiG9Ar4h9e3NkCm3zg":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":29,"type":30},[],"2024-12-07 20:45:16",169562026,[8,9,10,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd4d359a3543bef1b3c4a3403f045951e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9fe4e0e3f6fde606a4745d76e26c15f6.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa0370017c6ae4366790a507aef643d33.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fac2d84860e8329259d8495eeca9a4227.png\">",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},59,"db152c2fadebba327a9fbdc51dc416a4","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F478a08fe9045cb8995b5553cd778f91e.png","通信原理2024-2025第一学期","work_38708811","第六章(不计入总分)","稳态波v( t ) 的功率谱密度的表达式为",[21,31,34,42,51,60,69,76,82,92],{"answer":22,"createTime":23,"id":24,"options":25,"question":28,"source":29,"type":30},[],"2024-12-07 20:45:13",169562015,[26,27,10,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F077c4bcc0315e1c230d88212c80a3dd8.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa4c8288a460cdb301371e1acd062c7b5.png\">","交变波u ( t ) 的功率谱密度的表达式为","v1",0,{"answer":32,"createTime":5,"id":6,"options":33,"question":19,"source":29,"type":30},[],[8,9,10,11],{"answer":35,"createTime":36,"id":37,"options":38,"question":41,"source":29,"type":30},[],"2024-12-07 20:45:17",169562030,[8,39,40,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffec27aaa823e4aec7b37037ef7cb94ec.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F552435162ed747236a13baed8f3c0be7.png\">","s(t)=u(t)+v(t)的功率谱密度的表达式为(交变波u(t)与基带信号s(t) 、稳态波v(t))",{"answer":43,"createTime":36,"id":44,"options":45,"question":50,"source":29,"type":30},[],169562037,[46,47,48,49],"u(t)=s(t)−v(t)","u(t)=s(t)+v(t)","u(t)=s(t)×v(t)","u(t)=s(t)÷v(t)","交变波u(t)与基带信号s(t) 、稳态波v(t)之间的关系",{"answer":52,"createTime":36,"id":53,"options":54,"question":59,"source":29,"type":30},[],169562045,[55,56,57,58],"s(t)=u(t)−v(t)","s(t)=u(t)+v(t)","s(t)=u(t)×v(t)","s(t)=u(t)÷v(t)","基带信号s(t) 与交变波u(t),稳态波v(t)之间的关系",{"answer":61,"createTime":36,"id":62,"options":63,"question":68,"source":29,"type":30},[],169562049,[64,65,66,67],"AMI码","双极性归零码","单极性归零码","HDB3码","在"0"、"1"等概率出现情况下,包含直流成分的码是",{"answer":70,"createTime":36,"id":71,"options":72,"question":75,"source":29,"type":30},[],169562055,[64,73,66,74],"单极性不归零码","以上答案都不对","即使在"0"、"1"不等概率出现情况下,以下哪种码仍不包含直流成分",{"answer":77,"createTime":36,"id":78,"options":79,"question":81,"source":29,"type":30},[],169562059,[64,80,67,66],"多进制码","低频成分少,频带比较窄,另外即使有长连0码时也能提取位同步信号编码是",{"answer":83,"createTime":84,"id":85,"options":86,"question":91,"source":29,"type":30},[],"2024-12-07 20:45:18",169562061,[87,88,89,90],"1001011110101010","1001011110101011","0101011110101010","1001011110011010","如果AMI码为+100-10+1-1+1-10+10-10+1-1,那么其对应的消息代码为",{"answer":93,"createTime":84,"id":94,"options":95,"question":97,"source":29,"type":30},[],169562063,[64,96,67,66],"CMI码","以下4种传输码型中含有直流分量的传输码型是"]