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成电858系列|2017年真题及解析(超哥团队原创整理)

  • 2026-11-01 01:51:03
成电858系列|2017年真题及解析(超哥团队原创整理)
01
成电858《信号与系统》官方参考教材

02
2017真题全面解析

成电2017年858信号与系统考研真题整体难度中等，计算量中等，题目不太常规，考了判断拉普拉斯系统的题目、求解幅频响应和相频响应、傅里叶级数的证明题，这三个考点都是极其少见的，所以希望读者们可以专门关注，但与此同时也不必太多紧张，这类题目反而考法固定，思路单一，主要稍加学习就一定可以掌握！

03
2017年成电858真题
04
2017年成电858真题解析

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  1. CONNECT:[ UseTime:0.000448s ] mysql:host=172.18.0.4;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000659s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000315s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000354s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000516s ]
  6. SELECT * FROM `set` [ RunTime:0.000268s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000646s ]
  8. SELECT * FROM `article` WHERE `id` = 531815 LIMIT 1 [ RunTime:0.000364s ]
  9. UPDATE `article` SET `lasttime` = 1793493647 WHERE `id` = 531815 [ RunTime:0.001359s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000358s ]
  11. SELECT * FROM `article` WHERE `id` < 531815 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000433s ]
  12. SELECT * FROM `article` WHERE `id` > 531815 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000380s ]
  13. SELECT * FROM `article` WHERE `id` < 531815 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000654s ]
  14. SELECT * FROM `article` WHERE `id` < 531815 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000666s ]
  15. SELECT * FROM `article` WHERE `id` < 531815 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000664s ]
0.084812s