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RSS订阅原创 训练模型第一步--------使用LabelImg创建数据标签
装机环境：Win10+Python3.5一、LabelImg是什么？ LabelImg 是一个图形图像注释工具，采用 Python 编写而成，并使用 Qt 作为其图形界面二、前提准备工作 0.在这里，我默认你已经安装好了Python以及确保带有Pip（Python3.0以上一般都会自带） 1.安装PyQt5. pip install PyQt5 三、安装四、实验PyQt5-5.15.2-5.15.2-cp3...
2021-03-05 14:59:24
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原创 目标检测子区域划分之Selective Search
在Selective Search for Object Detection (C++ / Python)文中提到的五中解决办法: 在这几种算法中，Selective Search是最常用的，因为这种方式法的回召率最高。 那么问题来了： 1.回召率是什么？ 目标检测中召回率（Recall），精确率（Precision） 2.为什么选择回召率大的？ 按照文章中提到的观点， ...
2020-12-22 10:14:06
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原创 目标检测子区域划分之滑动窗口技术
目标检测之滑动窗口技术 目标检测是一件比较实际的且具有挑战性的计算机视觉任务，其可以看成图像分类与定位的结合，给定一张图片，目标检测系统要能够识别出图片的目标并给出其位置，由于图片中目标数是不定的，且要给出目标的精确位置，目标检测相比分类任务更复杂。 基本原理 滑窗的概念和卷积类似，通过使用某一长宽的核在图像上进行滑动，步长可以...
2020-12-20 11:22:27
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原创 2020年计算机相关专业（软件工程)保研去处（夏令营，预推免）
更新中~~~~楼主华东中下流211大学软件工程在大三在读，前五个学期专业成绩排名12/404，六级474。概率拿到学院保研名额。现特地纪录一些重点大学夏令营，预推免相关信息（排名没有任何根据，想起什么写什么),供诸君信息共享。浙江大学 软件学院 南京大学 天津大学 华中科技大学 中国科学技术大学 中国人民大学 武汉大学 南开大学 中山大学 西安交通大学 东南大学 四川大学 同济大学 北京航空航天大学 厦门大学 中南大学 湖南大学 华南理工大...
2020-08-18 18:44:27
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原创 PAT-A-1076 Forwards on Weibo
Weibo is known as the Chinese version of Twitter. One user on Weibo may have many followers, and may follow many other users as well. Hence a social network is formed with followers relations. When a user makes a post on Weibo, all his/her followers can vi
2020-06-19 17:24:57
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原创 浅析侧供给结构性改革及三去一降一补
背景改革开放三十多年来，中国经济持续高速增长，成功步入中等收入国家行列，已成为名副其实的经济大国。但随着人口红利衰减、“中等收入陷阱”风险累积、国际经济格局深刻调整等一系列内因与外因的作用，经济发展正进入“新常态”。2015年以来，我国经济进入了一个新阶段，主要经济指标之间的联动性出现背离，经济增长持续下行与CPI持续低位运行，居民收入有所增加而企业利润率下降，消费上升而投资下降，等等。对照经典经济学理论，当前我国出现的这种情况既不是传统意义上的滞胀，也非标准形态的通缩。与此同时，宏观调控层面货币政
2020-06-17 17:06:55
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原创 PAT-A-1085 Perfect Sequence 【二分查找】
Given a sequence of positive integers and another positive integerp. The sequence is said to be aperfect sequenceifM≤m×pwhereMandmare the maximum and minimum numbers in the sequence, respectively.Now given a sequence and a parameterp, you are s...
2020-06-17 17:04:18
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原创 PAT-A-1057 Stack 【桶排序】
Stack is one of the most fundamental data structures, which is based on the principle of Last In First Out (LIFO). The basic operations include Push (inserting an element onto the top position) and Pop (deleting the top element). Now you are supposed to im
2020-06-15 17:08:19
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原创 PAT刷题过程中用到的algorithm 函数库
1.lower_bound() 二分查找功能：函数lower_bound()在first和last中的前闭后开区间进行二分查找，返回大于或等于val的第一个元素位置。如果所有元素都小于val，则返回last的位置.注意：如果所有元素都小于val，则返回last的位置，且last的位置是越界的！ 关于前闭后开：想要使用二分法查找某个闭合区间[a,b]，如果使用lower_bound（）函数，那么一定要注意，最后要加1， lower_bound(a,b+1，x)2.upper_...
2020-06-15 11:23:24
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原创 PAT-A-1044 Shopping in Mars 【二分查找】 【前缀和】
Shopping in Mars is quite a different experience. The Mars people pay by chained diamonds. Each diamond has a value (in Mars dollars M$). When making the payment, the chain can be cut at any position for only once and some of the diamonds are taken off the
2020-06-15 11:00:57
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原创 PAT-A-1072 Gas Station 【Dijkstra】
A gas station has to be built at such a location that the minimum distance between the station and any of the residential housing is as far away as possible. However it must guarantee that all the houses are in its service range.Now given the map of the
2020-06-01 10:39:13
35367
原创 PAT-A- 1067 Sort with Swap(0, i)
Given any permutation of the numbers {0, 1, 2,...,N−1}, it is easy to sort them in increasing order. But what ifSwap(0, *)is the ONLY operation that is allowed to use? For example, to sort {4, 0, 2, 1, 3} we may apply the swap operations in the followin...
2020-05-31 11:55:32
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原创 PAT-A-1040 Longest Symmetric String 【最长回文串】
Given a string, you are supposed to output the length of the longest symmetric sub-string. For example, givenIs PAT&TAP symmetric?, the longest symmetric sub-string iss PAT&TAP s, hence you must output11.Input Specification:Each input file c...
2020-05-27 10:42:05
35031
原创 PAT-A-1063 Set Similarity 【set】
Given two sets of integers, the similarity of the sets is defined to beNc/Nt×100%, whereNcis the number of distinct common numbers shared by the two sets, andNtis the total number of distinct numbers in the two sets. Your job is to calcula...
2020-05-26 10:16:08
67685
原创 PAT-A-1062 Talent and Virtue 【排序】
About 900 years ago, a Chinese philosopher Sima Guang wrote a history book in which he talked about people's talent and virtue. According to his theory, a man being outstanding in both talent and virtue must be a "sage（圣人）"; being less excellent but with o
2020-05-25 15:16:00
67555
原创 PAT-A-1071 Speech Patterns 【散列】
People often have a preference among synonyms of the same word. For example, some may prefer "the police", while others may prefer "the cops". Analyzing such patterns can help to narrow down a speaker's identity, which is useful when validating, for exampl
2020-05-25 11:06:43
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原创 PAT-A-1038 Recover the Smallest Number 【贪心】 【二刷】
Given a collection of number segments, you are supposed to recover the smallest number from them. For example, given { 32, 321, 3214, 0229, 87 }, we can recover many numbers such like 32-321-3214-0229-87 or 0229-32-87-321-3214 with respect to different ord
2020-05-24 16:42:03
39016
原创 PAT-A- 1037 Magic Coupon 【贪心算法】
The magic shop in Mars is offering some magic coupons. Each coupon has an integerNprinted on it, meaning that when you use this coupon with a product, you may getNtimes the value of that product back! What is more, the shop also offers some bonus produ...
2020-05-24 15:24:57
39273
原创 PAT-A-1033 To Fill or Not to Fill 【贪心算法】
With highways available, driving a car from Hangzhou to any other city is easy. But since the tank capacity of a car is limited, we have to find gas stations on the way from time to time. Different gas station may give different price. You are asked to car
2020-05-24 14:44:46
38912
原创 PAT-A-1024 Palindromic Number 【大数相加】
A number that will be the same when it is written forwards or backwards is known as aPalindromic Number. For example, 1234321 is a palindromic number. All single digit numbers are palindromic numbers.Non-palindromic numbers can be paired with palindromi.
2020-05-24 11:03:50
38896
原创 PAT-A-1090 Highest Price in Supply Chain【树】
A supply chain is a network of retailers（零售商）, distributors（经销商）, and suppliers（供应商）-- everyone involved in moving a product from supplier to customer.Starting from one root supplier, everyone on the chain buys products from one's supplier in a pricePa..
2020-05-24 09:33:59
38844
原创 PAT-A-1094 The Largest Generation 【树】
A family hierarchy is usually presented by a pedigree tree where all the nodes on the same level belong to the same generation. Your task is to find the generation with the largest population.Input Specification:Each input file contains one test case.
2020-05-23 15:55:10
38901
原创 PAT-A-1093 Count PATs 【复习】
The stringAPPAPTcontains twoPAT's as substrings. The first one is formed by the 2nd, the 4th, and the 6th characters, and the second one is formed by the 3rd, the 4th, and the 6th characters.Now given any string, you are supposed to tell the number of...
2020-05-23 15:01:18
38846
原创 PAT-A-1096 Consecutive Factors 【因数分解】
Among all the factors of a positive integer N, there may exist several consecutive numbers. For example, 630 can be factored as 3×5×6×7, where 5, 6, and 7 are the three consecutive numbers. Now given any positive N, you are supposed to find the maximum num
2020-05-23 11:03:48
38873
原创 PAT-A-1088 Rational Arithmetic 【最小公倍数】 【最大公约数】
For two rational numbers, your task is to implement the basic arithmetics, that is, to calculate their sum, difference, product and quotient.Input Specification:Each input file contains one test case, which gives in one line the two rational numbers in
2020-05-23 10:31:05
38838
原创 PAT-A- 1092 To Buy or Not to Buy 【散列】
Eva would like to make a string of beads with her favorite colors so she went to a small shop to buy some beads. There were many colorful strings of beads. However the owner of the shop would only sell the strings in whole pieces. Hence Eva must check whet
2020-05-23 09:18:30
38805
原创 PAT-A-1081 Rational Sum 【最大公约数】【最小公倍数】
GivenNrational numbers in the formnumerator/denominator, you are supposed to calculate their sum.Input Specification:Each input file contains one test case. Each case starts with a positive integerN(≤100), followed in the next lineNrational numb...
2020-05-23 09:18:05
38855
原创 PAT-A-1084 Broken Keyboard 【散列】
On a broken keyboard, some of the keys are worn out. So when you type some sentences, the characters corresponding to those keys will not appear on screen.Now given a string that you are supposed to type, and the string that you actually type out, please
2020-05-22 17:37:10
38515
原创 PAT-A-1069 The Black Hole of Numbers 【验证】
For any 4-digit integer except the ones with all the digits being the same, if we sort the digits in non-increasing order first, and then in non-decreasing order, a new number can be obtained by taking the second number from the first one. Repeat in this m
2020-05-22 17:08:57
38344
原创 PAT-A- 1073 Scientific Notation 【科学计数法】
Scientific notation is the way that scientists easily handle very large numbers or very small numbers. The notation matches the regular expression [+-][1-9].[0-9]+E[+-][0-9]+ which means that the integer portion has exactly one digit, there is at least one
2020-05-22 12:57:16
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原创 PAT-A-1054 The Dominant Color 【散列】
Behind the scenes in the computer's memory, color is always talked about as a series of 24 bits of information for each pixel. In an image, the color with the largest proportional area is called the dominant color. Astrictlydominant color takes more than..
2020-05-22 11:17:23
38180
原创 PAT-A-1042 Shuffling Machine
菩提本无树，明镜亦非台.本来无一物，何处惹尘埃Shuffling is a procedure used to randomize a deck of playing cards. Because standard shuffling techniques are seen as weak, and in order to avoid "inside jobs" where employees collaborate with gamblers by performing inadequate shu.
2020-05-22 11:01:13
38565
原创 PAT-A-1027 Colors in Mars 【水】
People in Mars represent the colors in their computers in a similar way as the Earth people. That is, a color is represented by a 6-digit number, where the first 2 digits are forRed, the middle 2 digits forGreen, and the last 2 digits forBlue. The only ...
2020-05-22 10:04:07
38211
原创 PAT-A-1046 Shortest Distance 【前缀和】
The task is really simple: givenNexits on a highway which forms a simple cycle, you are supposed to tell the shortest distance between any pair of exits.Input Specification:Each input file contains one test case. For each case, the first line contain..
2020-05-22 09:37:21
38253
原创 PAT-A-1031 Hello World for U 【简单模拟】
Given any string ofN(≥5) characters, you are asked to form the characters into the shape ofU. For example,helloworldcan be printed as:h de ll rlowoThat is, the characters must be printed in the original order, starting top-down from the le...
2020-05-22 07:30:55
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原创 中国人民大学统计与大数据研究院夏令营
01为有志于在统计学、数据科学和人工智能领域继续发展的优秀大学生开阔学术视野、了解学术前沿，以加强青年学生对统计学、数据科学及人工智能研究的了解，中国人民大学统计与大数据研究院(简称研究院)将于2020年7月底举办“2020年优秀大学生夏令营”活动。一、 活动内容：（一）为期3天（根据疫情情况，暂定线上举行）的夏令营活动中，同学们将与研究院的全体教员、国际知名专家深度互动，了解数据科学与人工智能的前沿动态。（二）参加研究院组织的免试推荐直博和专业硕士研究生的初步考核及遴选。二、 时间安排
2020-05-21 17:16:55
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原创 中国科学技术大学 MIRA Lab夏令营
MIRA Lab 简介MIRA (Machine Intelligence Research and Applications) Lab负责人王杰教授曾任美国密歇根大学研究助理教授，于2017年通过国家人才计划引进回国，2018年入选国家优青项目，目前任中国科学技术大学信息学院教授。王杰教授以第一和通讯作者的身份在机器学习国际顶级会议及期刊（如 NIPS、ICML、JMLR 和 TPAMI 等）发表过多篇文章，并连续三年受邀在 NIPS 大会上作 Spotlight 报告。他的代表性工作进入由三位国际机
2020-05-21 16:59:49
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罗技g102鼠标驱动
2020-12-17
南昌大学成绩证明.docx
2020-05-22
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