[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f1aYFrFV5MlLGtLOoUbKtJOnJOufsYE00lUBBpeYWnZs":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2024-04-09 16:57:04",137508738,[8,9,10,11],"12","24","6","14",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},24,"1c6940ad239b1d38e28a02365b3dec17","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F97eba5265bbc8a449d9ddaa443b457c4.jpg","数字信号处理+国家级一流课程+2024年春季+通工、物联网、信工等专业","d3de26bfe1b34286bb23122495326628","第一章测试","求下面序列的周期\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F965b205f1a291680ebbb80d01a3c9603.JPG\">",[21,33,43,53,62,71,80,89,92,102],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2024-04-09 16:57:01",137508731,[26,27,28,29],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc93535a48221123b73861801c4faeba3.JPG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa3e29f24539c0a7ba7e32b69c1e0fc4a.JPG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F45ce9c6a3b3b554906aff40f011c7a41.JPG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fce18ab97ab7f2763efda5b84856932ee.JPG\">","下列系统哪个是时变的系统()","v1",0,{"answer":34,"createTime":35,"id":36,"options":37,"question":42,"source":31,"type":32},[],"2024-04-09 16:57:02",137508732,[38,39,40,41],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F915aee624debd20a8194db18cfb9fb5d.JPG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1118101c95b70e397dc1340294b24875.JPG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe47727474be99cc9ea84353c61cff9ef.JPG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffaadefc491703a0dca1d6960b802f08c.JPG\">","下列关系正确的为( )",{"answer":44,"createTime":45,"id":46,"options":47,"question":52,"source":31,"type":32},[],"2024-04-09 16:57:03",137508733,[48,49,50,51],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0f8ab5f13ff64a46c28c0a48f81435ff.JPG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb5dd043c20f318f2cb019882a0ecc7b9.JPG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb72810aca58b4fc95cafc0bb35c1deaf.JPG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe3eca1c46133bf88c3237991c95e674a.JPG\">","以下单位冲激响应所代表的线性移不变系统中因果稳定的是( )",{"answer":54,"createTime":45,"id":55,"options":56,"question":61,"source":31,"type":32},[],137508734,[57,58,59,60],"单位圆","原点","实轴","虚轴","一个线性移不变离散系统稳定的充分必要条件是其系统函数的收敛域包含( )",{"answer":63,"createTime":45,"id":64,"options":65,"question":70,"source":31,"type":32},[],137508735,[66,67,68,69],"非线性、时不变、因果","线性、时不变、因果","线性、时变、非因果","非线性、时变、因果","已知某离散系统的输入输出关系是\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc67104566b9db4bc7b063750f097c9fc.JPG\">试判断系统的线性、时不变性和因果性分别为 、 、",{"answer":72,"createTime":45,"id":73,"options":74,"question":79,"source":31,"type":32},[],137508736,[75,76,77,78],"模拟信号","时间离散信号","高频窄带信号","带限模拟信号","时域采样定理中指出能够被采样的信号应该是",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":31,"type":32},[],137508737,[84,85,86,87],"时域采样频域采样","时域周期频域采样","频域采样时域周期","时域采样频域周期延拓","从时域采样定理我们可以得到的结论是",{"answer":90,"createTime":5,"id":6,"options":91,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":93,"createTime":94,"id":95,"options":96,"question":101,"source":31,"type":32},[],"2024-04-09 16:57:06",137508742,[97,98,99,100],"y(n)={1,2,4,8,11,11,10,8}","y(n)={1,2,5,8,11,11,10,8}","y(n)={1,2,4,6,11,10,8,4}","y(n)={1,2,4,11,11,11,10,8}","一个线性时不变系统其单位脉冲序列为h(n)={1,1,1,2},在输入序列为x(n)={1,1,2,3,4}的激励下,系统的响应是",{"answer":103,"createTime":104,"id":105,"options":106,"question":111,"source":31,"type":32},[],"2024-04-09 16:57:08",137508745,[107,108,109,110],"{1,2,2,8,13,12,7,11,10}","{1,2,2,2,8,13,12,7,11,10}","{1,2,3,8,13,12,7,11,10}","{1,2,2,8,12,13,7,11,10}","求下面两个序列的线性卷积\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F532c03e840fb3d7ab3d88835dbac25e5.JPG\">"]