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RSS订阅原创 空调的制冷和制热哪个更耗电？
先说结论：制热更耗电空调制冷原理： 空调器通电后，制冷系统内制冷剂zhi的低压蒸汽被压缩机吸入并dao压缩为高压蒸汽后排至冷凝器。同时轴流风扇吸入的室外空气流经冷凝器，带走制冷剂放出的热量，使高压制冷剂蒸汽凝结为高压液体。高压液体经过过滤器、节流机构后喷入蒸发器，并在相应的低压下蒸发，吸取周围的热量。同时贯流风扇使空气不断进入蒸发器的肋片间进行热交换，并将放热后变冷的空气送向室内。如此室内空气不断循环流动，达到降低温度的目的。 除了制冷，冷暖两用空调还可以制热。其实简单得说，制热就是将制冷过程颠倒
2020-08-12 15:57:51
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原创 【论文阅读笔记】Vision-Based Fallen Person Detection for the Elderly
Vision-Based Fallen Person Detection for the Elderly作者：Markus D. Solbach ， John K. Tsotsos单位： Department of Electrical Engineering and Computer ScienceYork University, Canada发表信息：IN ACVR 2017论文链接：https://arxiv.org/pdf/1707.07608背景动机： 跌倒对于老年人来说是严重的且
2020-08-12 11:44:28
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原创 【论文阅读笔记】：DeepFall – Non-invasive Fall Detection with Deep Spatio-Temporal Convolutional Autoencoders
DeepFall – Non-invasive Fall Detection with Deep Spatio-Temporal Convolutional Autoencoders作者：Jacob Nogas, Shehroz S. Khan, Alex Mihailidis单位： University of Toronto. Toronto Rehabilitation Institute, University Health Network.发表信息：arXiv:1809.00977，Submi
2020-08-12 11:36:07
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原创 【论文阅读笔记】：Falls Prediction Based on Body Keypoints and Seq2Seq Architecture
Falls Prediction Based on Body Keypoints and Seq2Seq Architecture作者：Minjie Hua，Yibing Nan，Shiguo Lian单位：CloudMinds Technologies Inc发表信息：IN HBU 2019 (ICCV Workshop)论文链接：https://arxiv.org/pdf/1908.00275背景动机： 老年人摔倒引起的受伤是发病，残疾和医疗保健利用率提高的主要原因。因此，跌倒预测是老年人
2020-08-12 11:25:29
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原创 PAT A1030 Travel Plan (30分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805464397627392题目描述A traveler’s map gives the distances between cities along the highways, together with the cost of each highway. ...
2020-04-25 16:39:25
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原创 PAT A1003 Emergency (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805523835109376题目描述As an emergency rescue team leader of a city, you are given a special map of your country. The map shows several...
2020-04-23 20:27:56
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原创 PAT A1076 Forwards on Weibo (30分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805392092020736题目描述Weibo is known as the Chinese version of Twitter. One user on Weibo may have many followers, and may follow many...
2020-04-22 13:37:03
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原创 PAT A1034 Head of a Gang (30分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805456881434624题目描述One way that the police finds the head of a gang is to check people’s phone calls. If there is a phone call betw...
2020-04-22 12:17:38
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原创 1098 Insertion or Heap Sort (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805368847187968题目描述According to Wikipedia:Insertion sort iterates, consuming one input element each repetition, and growing a sort...
2020-04-20 16:10:16
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原创 PAT A1107 Social Clusters (30分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805361586847744题目描述When register on a social network, you are always asked to specify your hobbies in order to find some potential ...
2020-04-19 19:06:26
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原创 PAT A1066 Root of AVL Tree (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805404939173888题目描述An AVL tree is a self-balancing binary search tree. In an AVL tree, the heights of the two child subtrees of any...
2020-04-19 17:05:53
176
转载 从目标检测到小目标检测
目标检测目标检测（object detection），就是在给定的一张图片中精确找到物体所在的位置，并标注出物体的类别。所以，目标检测要解决的问题就是物体在哪里以及是什么的整个流程问题。但是，在实际照片中，物体的尺寸变化范围很大，摆放物体的角度、姿态、在图片中的位置都不一样，物体之间可能还有重叠现象，这使得目标检测的难度变得很大。目标检测近些年取得了较大发展，主要原因就是卷积神经网络...
2020-04-18 10:58:31
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转载 训练集、测试集、验证集与模型选择
原文链接：https://blog.csdn.net/hohaizx/article/details/81013985 在机器学习过程中，为了找到泛化性能最好的那个函数，我们需要确定两方面的参数：1、假设函数参数，也就是我们通常所说的ww等，这些参数被...
2020-04-15 10:41:10
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转载 无人驾驶中的传感器
传感器概览无人驾驶作为高度集成的系统，所使用的传感器种类繁多、技术跨度较大，如果要做分类，个人认为可以简单分为服务于感知系统的和服务于定位系统的。展开来看，常见的有激光雷达、相机、毫米波、超声波；组合导航（IMU）轮速计等，但再细分，其实又可以分出很多子类。这里讲一下常用的几种感知传感器。激光雷达按线数分有1、4、8、16、32、40、64、128线等，按工作原理分有机械旋转式和固态式，而固态又分...
2020-04-12 22:31:10
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转载 无人驾驶—激光雷达与相机
1.激光雷达与摄像头性能对比在无人驾驶环境感知设备中，激光雷达和摄像头分别有各自的优缺点。摄像头的优点是成本低廉，用摄像头做算法开发的人员也比较多，技术相对比较成熟。摄像头的劣势，第一，获取准确三维信息非常难（单目摄像头几乎不可能，也有人提出双目或三目摄像头去做）；另一个缺点是受环境光限制比较大。激光雷达的优...
2020-04-12 19:33:22
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原创 PAT A1091 Acute Stroke (30分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805375457411072题目描述One important factor to identify acute stroke (急性脑卒中) is the volume of the stroke core. Given the results of ima...
2020-04-12 18:58:49
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原创 PAT A1103 Integer Factorization (30分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805364711604224题目描述The K−P factorization of a positive integer N is to write N as the sum of the P-th power of K positive integers....
2020-04-11 18:51:39
175
原创 PAT A1099 Build A Binary Search Tree (30分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805367987355648题目描述A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties:The left ...
2020-04-11 10:16:56
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原创 PAT A1064 Complete Binary Search Tree (30分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805407749357568题目描述A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties:The left ...
2020-04-10 23:31:32
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原创 PAT A1043 Is It a Binary Search Tree (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805440976633856题目描述A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties:The left ...
2020-04-10 23:15:33
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原创 PAT A1053 Path of Equal Weight (30分)
题目链接：题目描述Given a non-empty tree with root R, and with weight Wi assigned to each tree node Ti . The weight of a path from R to L is defined to be the sum of the weights of all the nodes alon...
2020-04-10 22:35:58
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原创 PAT A1004 Counting Leaves (30分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805521431773184题目描述A family hierarchy is usually presented by a pedigree tree. Your job is to count those family members who have n...
2020-04-10 21:49:20
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原创 PAT A1106 Lowest Price in Supply Chain (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805362341822464题目描述A supply chain is a network of retailers（零售商）, distributors（经销商）, and suppliers（供应商）-- everyone involved in movi...
2020-04-09 23:09:36
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原创 PAT A1094 The Largest Generation (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805372601090048题目描述A family hierarchy is usually presented by a pedigree tree where all the nodes on the same level belong to the s...
2020-04-09 22:58:44
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原创 PAT A1079 Total Sales of Supply Chain (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805388447170560题目描述A supply chain is a network of retailers（零售商）, distributors（经销商）, and suppliers（供应商）-- everyone involved in movi...
2020-04-09 22:42:08
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原创 PAT A1090 Highest Price in Supply Chain (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805376476626944题目描述A supply chain is a network of retailers（零售商）, distributors（经销商）, and suppliers（供应商）-- everyone involved in movi...
2020-04-09 22:24:14
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原创 PAT A1102 Invert a Binary Tree (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805365537882112题目描述The following is from Max Howell @twitter:Google: 90% of our engineers use the software you wrote (Homebrew), b...
2020-04-09 22:01:05
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原创 PAT A1086 Tree Traversals Again (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805380754817024题目描述可以以非递归方式使用堆栈来实现有序二叉树遍历。例如，假设遍历6节点的二叉树（键的编号从1到6），则堆栈操作为：push（1）; push（2）; push（3）; pop（）; pop（）; push（4）; pop（）; ...
2020-04-09 19:01:22
122
转载 中国牵头”雪人计划”以及IPv6根服务器那些事
原文链接：https://blog.csdn.net/qq_42730134/article/details/914299572017年11月末，网上曾出现过这样一则新闻：下一代互联网国家工程中心牵头发起的“雪人计划”已在全球完成25台IPv6根服务器的架设，其中有4台部署在中国，打破了中国过去没有根服务器的困境。“互联网”如今已经成为了每个人生活中的一部分，我们许多人早已习惯了每天在网上浏...
2020-04-08 10:38:39
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原创 PAT A1097 Deduplication on a Linked List (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805369774129152题目描述Given a singly linked list L with integer keys, you are supposed to remove the nodes with duplicated absolute va...
2020-04-05 21:06:01
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原创 PAT A1074 Reversing Linked List (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805394512134144题目描述Given a constant K and a singly linked list L, you are supposed to reverse the links of every K elements on L. F...
2020-04-03 21:14:32
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原创 PAT B1025 反转链表 (25分)
题目链接：https://pintia.cn/problem-sets/994805260223102976/problems/994805296180871168题目描述给定一个常数 K 以及一个单链表 L，请编写程序将 L 中每 K 个结点反转。例如：给定 L 为 1→2→3→4→5→6，K 为 3，则输出应该为 3→2→1→6→5→4；如果 K 为 4，则输出应该为 4→3→2→1→5→...
2020-04-03 21:12:01
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原创 PAT A1056 Mice and Rice (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805419468242944题目描述Mice and Rice is the name of a programming contest in which each programmer must write a piece of code to contro...
2020-04-03 17:20:19
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原创 PAT A1051 Pop Sequence (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805427332562944题目描述Given a stack which can keep M numbers at most. Push N numbers in the order of 1, 2, 3, …, N and pop randomly. Y...
2020-04-03 16:11:57
169
原创 PAT A1022 Digital Library (30分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805480801550336题目描述A Digital Library contains millions of books, stored according to their titles, authors, key words of their abst...
2020-04-03 14:54:15
144
原创 PAT A1071 Speech Patterns (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805398257647616题目描述People often have a preference among synonyms of the same word. For example, some may prefer “the police”, while...
2020-04-02 19:31:53
148
原创 PAT A1054 The Dominant Color (20分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805422639136768题目描述Behind the scenes in the computer’s memory, color is always talked about as a series of 24 bits of information f...
2020-04-02 18:24:01
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原创 PAT A1100 Mars Numbers (20分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805367156883456题目描述People on Mars count their numbers with base 13:Zero on Earth is called “tret” on Mars.The numbers 1 to 12 on ...
2020-04-01 17:37:05
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原创 PAT A1063 Set Similarity (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805409175420928题目描述Given two sets of integers, the similarity of the sets is defined to be Nc /Nt ×100%, where Nc is the ...
2020-04-01 16:16:55
138
原创 PAT A1047 Student List for Course (25分)
题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805433955368960题目描述Zhejiang University has 40,000 students and provides 2,500 courses. Now given the registered course list of each...
2020-04-01 15:15:23
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