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Algorithm Archives - Page 2 of 3 - Dr. Pei

Hierarchical Deep Reinforcement Learning: Integrating Temporal Abstraction and Intrinsic Motivation

April 22, 2026

Hierarchical Deep Reinforcement Learning: Integrating Temporal Abstraction and Intrinsic Motivation 当环境给的奖励少而延迟时，论文给出了一个解决方案：agent至始至终只有一个，但分两个阶段：1总控器阶段，选goal，2控制器，根据当前state和goal，输出action，critic判断goal是否完成或达到终态。重复1,2。总控器选一个新的goal，控制器再输出action，依次类推。我理解它把环境“分”出N个时序上的小环境，与每个小环境对应1个goal。agent实体在这种环境下可以等效为一个点。 The key is that the policy over goals πg which makes expected Q-value with discounting maximum is the policy which the agent chooses, i.e., if the goal sequence g1-g3-g2-… ‘s Q-value is the maximum value among that of all kinds of goal sequences, the agent should… read more »

Meta Learning Shared Hierarchies

April 22, 2026

Meta Learning Shared Hierarchies Notation S: state space. A: action space. MDP: transition function P(s’, r|s, a), (s’, r): next state and reward, (s,a): state and action. PM : distribution over MDPs M with the same state-action space (S, A). Agent: a function mapping from a multi-episode history (s0, a0, r0, s1, a2, r2, …… read more »

Hierarchical Actor-Critic

April 22, 2026

Hierarchical Actor-Critic Download Hierarchical_Actor-Critic Flowchart Terminology Artificial  intelligence Optimization/decision/control a Agent Controller or decision maker b Action Control c Environment System d Reward of a stage (Opposite of) Cost of a stage e Stage value (Opposite of) Cost of a state f Value (or state-value) function (Opposite of) Cost function g Maximizing the value function… read more »

Radix Sort

June 2, 2026

Download Radix Sort // //  main.cpp //  Radix_Sort // //  Created by Z Pei on 12/24/18. //  Copyright © 2018 Z Pei. All rights reserved. // // C++ implementation of Radix Sort #include<iostream> using namespace std; // A utility function to get maximum value in arr[] int getMax(int arr[], int n) {     int… read more »

Bucket Sort

June 2, 2026

Download Bucket Sort // //  main.cpp //  Bucket_Sort // //  Created by Z Pei on 12/24/18. //  Copyright © 2018 Z Pei. All rights reserved. // // C++ program to sort an array using bucket sort #include <iostream> #include <algorithm> #include <vector> using namespace std; // Function to sort arr[] of size n using bucket… read more »

Counting Sort

June 2, 2026

Download Counting Sort // //  main.cpp //  Counting_Sort // //  Created by Z Pei on 12/24/18. //  Copyright © 2018 Z Pei. All rights reserved. // // C Program for counting sort #include <stdio.h> #include <string.h> #define RANGE 255 // The main function that sort the given string arr[] in // alphabatical order void countSort(char… read more »

Heap Sort

June 2, 2026

Geeks for Geeks for Heap Sort. Visualization for Heap Sort. Animation for Heap Sort.   Download Heap Sort   // //  main.cpp //  Heap_Sort // //  Created by Z Pei on 12/24/18. //  Copyright © 2018 Z Pei. All rights reserved. // // C++ program for implementation of Heap Sort #include <iostream> using namespace std;… read more »

Quick Sort

June 2, 2026

Download Quick Sort // //  main.cpp //  Quick_Sort // //  Created by Z Pei on 12/24/18. //  Copyright © 2018 Z Pei. All rights reserved. // /* C implementation QuickSort */ #include<stdio.h> // A utility function to swap two elements void swap(int* a, int* b) {     int t = *a;     *a… read more »

Merge Sort

June 2, 2026

Download Merge Sort // //  main.cpp //  Merge_Sort // //  Created by Z Pei on 12/23/18. //  Copyright © 2018 Z Pei. All rights reserved. // /* C program for Merge Sort */ #include<stdlib.h> #include<stdio.h> // Merges two subarrays of arr[]. // First subarray is arr[l..m] // Second subarray is arr[m+1..r] void merge(int arr[], int… read more »

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