Road and destination

当与所爱之人共同踏上人生的旅程时,最终的目的地变得不那么重要,关键在于这段旅程的质量与体验。

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 When we travel life's road with those we love, the point of final destination is secondary to the quality of our journey!
One day in the jail, F·F invites Jolyne Kujo (JOJO in brief) to play tennis with her. However, Pucci the father somehow knows it and wants to stop her. There are N N spots in the jail and M M roads connecting some of the spots. JOJO finds that Pucci knows the route of the former ( K − 1 ) (K−1)-th shortest path. If Pucci spots JOJO in one of these K − 1 K−1 routes, Pucci will use his stand Whitesnake and put the disk into JOJO's body, which means JOJO won't be able to make it to the destination. So, JOJO needs to take the K K-th quickest path to get to the destination. What's more, JOJO only has T T units of time, so she needs to hurry. JOJO starts from spot S S, and the destination is numbered E E. It is possible that JOJO's path contains any spot more than one time. Please tell JOJO whether she can make arrive at the destination using no more than T T units of time. Input There are at most 50 50 test cases. The first line contains two integers N N and M M ( 1 ≤ N ≤ 1000 , 0 ≤ M ≤ 10000 ) (1≤N≤1000,0≤M≤10000). Stations are numbered from 1 1 to N N. The second line contains four numbers S , E , K S,E,K and T T ( 1 ≤ S , E ≤ N 1≤S,E≤N, S ≠ E S  =E, 1 ≤ K ≤ 10000 1≤K≤10000, 1 ≤ T ≤ 100000000 1≤T≤100000000 ). Then M M lines follows, each line containing three numbers U , V U,V and W W ( 1 ≤ U , V ≤ N , 1 ≤ W ≤ 1000 ) (1≤U,V≤N,1≤W≤1000) . It shows that there is a directed road from U U-th spot to V V-th spot with time W W. It is guaranteed that for any two spots there will be only one directed road from spot A A to spot B B ( 1 ≤ A , B ≤ N , A ≠ B ) (1≤A,B≤N,A  =B), but it is possible that both directed road a n d d i r e c t e d r o a d anddirectedroad exist. All the test cases are generated randomly. Output One line containing a sentence. If it is possible for JOJO to arrive at the destination in time, output "yareyaredawa" (without quote), else output "Whitesnake!" (without quote).的c++代码
07-13
资源下载链接为: https://pan.quark.cn/s/790f7ffa6527 在一维运动场景中,小车从初始位置 x=-100 出发,目标是到达 x=0 的位置,位置坐标 x 作为受控对象,通过增量式 PID 控制算法调节小车的运动状态。 系统采用的位置迭代公式为 x (k)=x (k-1)+v (k-1) dt,其中 dt 为仿真过程中的恒定时间间隔,因此速度 v 成为主要的调节量。通过调节速度参数,实现对小车位置的精确控制,最终生成位置 - 时间曲线的仿真结果。 在参数调节实验中,比例调节系数 Kp 的影响十分显著。从仿真曲线可以清晰观察到,当增大 Kp 值时,系统的响应速度明显加快,小车能够更快地收敛到目标位置,缩短了稳定时间。这表明比例调节在加快系统响应方面发挥着关键作用,适当增大比例系数可有效提升系统的动态性能。 积分调节系数 Ki 的调节则呈现出不同的特性。实验数据显示,当增大 Ki 值时,系统运动过程中的波动幅度明显增大,位置曲线出现更剧烈的震荡。但与此同时,小车位置的变化速率也有所提高,在动态调整过程中能够更快地接近目标值。这说明积分调节虽然会增加系统的波动性,但对加快位置变化过程具有积极作用。 通过一系列参数调试实验,清晰展现了比例系数和积分系数在增量式 PID 控制系统中的不同影响规律,为优化控制效果提供了直观的参考依据。合理匹配 Kp 和 Ki 参数,能够在保证系统稳定性的同时,兼顾响应速度和调节精度,实现小车位置的高效控制。
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