[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f1ZlBcVYWX__kNPlACETABRK2F88y3OUKv7E3Gl0fSOI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":17,"related":18,"source":26,"type":27},[],"2024-06-22 12:18:48",154262872,[8,9],"数据挖掘","数据分析",{"count":11,"courseId":12,"courseImg":13,"courseName":14,"workId":15,"workName":16},134,"b39860e838906fce71b4aa9d99bf9491","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7e2d5ad53be3d12aacc56ee37db405b7.jpg","数据仓库与数据挖掘","exam_126306159","终结性考核试卷","&quot;描述和探索性分析,评估现状和修正不足&quot;是",[19,28,34,37,46,54,63,73,81,89],{"answer":20,"createTime":5,"id":21,"options":22,"question":25,"source":26,"type":27},[],154262868,[23,24],"OLTP","OLAP","对于OLTP和OLAP,那个用户量相对大一些呢","v1",0,{"answer":29,"createTime":5,"id":30,"options":31,"question":33,"source":26,"type":27},[],154262869,[8,32],"机器学习","模拟或实现人类学习行为,以获取新的知识或技能,重新组织已有的知识结构,使之不断改善自身的性能是( )任务",{"answer":35,"createTime":5,"id":6,"options":36,"question":17,"source":26,"type":27},[],[8,9],{"answer":38,"createTime":5,"id":39,"options":40,"question":45,"source":26,"type":27},[],154262875,[41,42,43,44],"扩大输入空间,把涨、跌参数后面拼接一个好的随机数nonce,计算出一个digest,把digest和nonce提前发布出去,到时间公布内容时,大家来验证解封内容.因为别人不知道这个随机数nonce,而且输入空间足够大,遍历方法很难在有限时间内找出这个nonce,就无法蛮力求解seasled envelope的内容了","没有办法解决","更换HASH函数","扩大输入空间,把涨、跌参数后面拼接一个好的随机数nonce,计算出一个digest,把digest提前发布出去,而把nonce保存起来,到时间公布内容时,再把nonce一起发布出去,大家来验证解封内容.因为别人不知道这个随机数nonce,而且输入空间足够大,遍历方法很难在有限时间内找出这个nonce,就无法蛮力求解seasled envelope的内容了","在使用HASH函数的抗碰撞性(collision resistance)、和信息隐藏性(hiding)来是想预测股票涨停的digital commiment的seasled envelope时,假设哈西函数为H,输入参数为&quot;涨&quot;或&quot;跌&quot;,那么用H('涨')=digest1 或用 H('涨')=digest2用遍历输入空间的值(涨&quot;,&quot;跌&quot;),对比结果,推断出seasled envelope里面的内容.那如何解决此问题",{"answer":47,"createTime":5,"id":48,"options":49,"question":53,"source":26,"type":27},[],154262877,[50,51,52],"数据不一致性","缺失值","噪声数据","&quot;系统设计时可能存在的缺陷或者在系统使用过程中人为因素的影响&quot;是以下原始数据通常存在着哪类问题",{"answer":55,"createTime":5,"id":56,"options":57,"question":62,"source":26,"type":27},[],154262881,[58,59,60,61],"纯净的","无缺失的","完整的","&quot;脏&quot;的","现实世界中的数据大多都是",{"answer":64,"createTime":65,"id":66,"options":67,"question":72,"source":26,"type":27},[],"2024-06-22 12:18:49",154262885,[68,69,70,71],"判断H(key|msg')是否等于com","判断H(key|msg')是否等于msg","判断H(msg')是否等于H(msg)","判断H(com|msg')是否等于key","verify(com,key,msg')函数用来验证预言家公布的msg'是否是当初预言家的预言msg,该函数如何实现",{"answer":74,"createTime":65,"id":75,"options":76,"question":80,"source":26,"type":27},[],154262889,[77,78,79],"回归","分箱","离群点分析","噪声(Noise)是被测量的变量的随机误差或方差.噪声的处理方法一般有分箱、回归和离群点分析等方法,下图是哪种方法? \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1b83994facdf6d1b288ed690ce73704d.webp\">",{"answer":82,"createTime":65,"id":83,"options":84,"question":88,"source":26,"type":27},[],154262894,[85,86,87],"一直被认为具备","1996年,被证实存在弱点,可以被加以破解;2004年,证实MDA5算法无法防止碰撞","从不具备","MD5算法具有collision resistance的吗",{"answer":90,"createTime":65,"id":91,"options":92,"question":97,"source":26,"type":27},[],154262897,[93,94,95,96],"云服务","数据仓库","操作系统","数据库系统","面向主题的、集成的与时间相关且不可修改的数据集合是什么定义"]