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原创系统分析与设计【lesson16】

1.使用 ECB 实现 make reservation 用例的详细设计（包含用例简介，顺序图，类图）答： 2.将逻辑设计类图映射到实际项目框架的包图。用树形结构表述实现的包和类 ...

2018-06-27 02:23:50 238

原创【系统分析与设计】lesson13

1.描述软件架构与框架之间的区别与联系答：软件架构： - 是一系列相关的抽象模式，用于指导大型软件系统各个方面的设计。软件架构描述的对象是直接构成系统的抽象组件。各个组件之间的连接则明确和相对细致地描述组件之间的通讯。 - 在实现阶段，这些抽象组件被细化为实际的组件，比如具体某个类或者对象。在面向对象领域中，组件之间的连接通常用接口来实现。软件框架： - 指在一定的设计原则基础上...

2018-06-02 21:07:40 302

原创【系统分析与设计】作业6

一.建模文档编写选题详情1.用户用例图 2.种树业务活动图 3.领域模型 4.种树对象状态图 5.种树业务顺序图

2018-05-11 23:24:23 246

原创【系统分析与设计】作业5

一、使用 UML State Modela. - 建模对象：参考 Asg_RH 文档，对 Reservation/Order 对象建模。 - 建模要求：参考练习不能提供足够信息帮助你对订单对象建模，请参考现在定旅馆的旅游网站，尽可能分析围绕订单发生的各种情况，直到订单通过销售事件（柜台销售）结束订单。答： b.研究淘宝退货流程活动图，对退货业务对象状态建模

2018-05-03 12:20:37 201

原创【系统分析与设计】作业4

一、领域建模a. 阅读 Asg_RH 文档，按用例构建领域模型。按 Task2 要求，请使用工具 UMLet，截图格式务必是 png 并控制尺寸说明：请不要受 PCMEF 层次结构影响。你需要识别实体（E）和中介实体（M，也称状态实体）在单页面应用（如 vue）中，E 一般与数据库构建有关， M 一般与 store 模式有关在 java web 应用中，E 一般与数据库构建...

2018-04-27 01:15:27 510

原创【系统分析与设计】作业3

一、用例建模a. 阅读 Asg_RH 文档，绘制用例图。按 Task1 要求，请使用工具 UMLet，截图格式务必是 png 并控制尺寸答： b.选择你熟悉的定旅馆在线服务系统（或移动 APP），如绘制用例图。并满足以下要求：对比 Asg_RH 用例图，请用色彩标注出创新用例或子用例尽可能识别外部系统，并用色彩标注新的外部系统和服务去哪儿找酒店截图如下：根据使用，画出用例图如下：

2018-04-19 00:10:03 457

原创【系统分析与设计】作业2

一、简答题1.简述瀑布模型、增量模型、螺旋模型（含原型方法）的优缺点答：瀑布模型的优点： ①可强迫开发人员采用规范的方法； ②严格规定了每个阶段必须提交的文档； ③要求每个阶段交出的所有产品都必须经过质量保证小组的仔细验证。瀑布模型的缺点： ①在软件开发初期，指明用户全部需求是困难的； ②需求确定后，经过一段时间才得到软件最初版本； ③完全依赖规格说明，导致不能满足用户...

2018-03-19 18:16:20 247

原创【系统分析与设计】作业1

一、简单题1.软件工程的定义答：是指导计算机软件开发和维护的工程学科。采用工程的概念、原理、技术和方法来开发与维护软件，是将系统化、规范化、可度量的方法应用于软件的开发、运行和维护的过程。它把经过实践考验而证明正确的管理技术和当前能够得到的最好的技术方法结合起来。2.阅读经典名著“人月神话”等资料，解释 software crisis、COCOMO 模型。答： ①软件危机（即so...

2018-03-14 20:47:08 445

原创 Unique Paths II_Week19

Unique Paths II_Week19题目：(Unique Paths II) ←链接戳这里题目说明： Follow up for “Unique Paths”:Now consider if some obstacles are added to the grids. How many unique paths would there be?An obstacle and empty s

2018-01-14 22:59:44 173

原创《Algorithms》第8章 8.9_Week 17

《Algorithms》第8章习题 ——Week 17题目： 8.9 In the HITTING SET problem, we are given a family of sets {S1,S2,…,Sn} and a budget b, and we wish to find a set H of size ≤ b which intersects every Si, if such

2017-12-31 21:59:00 187

原创 Clone Graph_Week18

Clone Graph_Week17题目：(Clone Graph) ←链接戳这里题目说明： Clone an undirected graph. Each node in the graph contains a label and a list of its neighbors.OJ’s undirected graph serialization: Nodes are labeled u

2017-12-26 22:23:25 195

原创 #Path Sum II_Week16

Path Sum II_Week16题目：(Path Sum II) ←链接戳这里题目说明： Given a binary tree and a sum, find all root-to-leaf paths where each path’s sum equals the given sum.For example: Given the below binary tree and sum

2017-12-26 22:02:02 158

原创 Daily Temperatures_Week15

Daily Temperatures_Week15题目：(Daily Temperatures) ←链接戳这里题目说明： Given a list of daily temperatures, produce a list that, for each day in the input, tells you how many days you would have to wait until a

2017-12-16 13:06:09 217

原创 Strange Printer_Week14

Strange Printer_Week14题目：(Strange Printer) ←链接戳这里题目说明： There is a strange printer with the following two special requirements:The printer can only print a sequence of the same character each time. A

2017-12-16 12:33:38 217

原创 2 Keys Keyboard_Week13

2 Keys Keyboard_Week13题目：(2 Keys Keyboard) ←链接戳这里题目说明： Initially on a notepad only one character ‘A’ is present. You can perform two operations on this notepad for each step:Copy All: You can copy al

2017-12-03 11:16:48 223

原创 Maximum Swap_Week12

Maximum Swap_Week12题目：(Maximum Swap) ←链接戳这里题目说明： Given a non-negative integer, you could swap two digits at most once to get the maximum valued number. Return the maximum valued number you could get.

2017-12-03 10:55:08 187

原创 01 Matrix_Week11

01 Matrix_Week11题目：(01 Matrix) ←链接戳这里题目说明： Given a matrix consists of 0 and 1, find the distance of the nearest 0 for each cell.The distance between two adjacent cells is 1. Example 1: Input: 0

2017-11-12 23:20:45 252

原创 Decode String_Week10

Decode String_Week10题目：(Decode String) ←链接戳这里题目说明： Given an encoded string, return it’s decoded string.The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is

2017-11-12 22:14:31 197

原创 Serialize and Deserialize Binary Tree_Week9

Serialize and Deserialize Binary Tree_Week9题目：(Serialize and Deserialize Binary Tree) ←链接戳这里题目说明： Serialization is the process of converting a data structure or object into a sequence of bits so that

2017-11-12 20:05:05 187

原创 Minimum Number of Arrows to Burst Balloons_Week8

Minimum Number of Arrows to Burst Balloons_Week8题目：(Minimum Number of Arrows to Burst Balloons) ←链接戳这里题目说明： There are a number of spherical balloons spread in two-dimensional space. For each balloon,

2017-10-29 14:08:35 285

原创 Candy_Week7

Candy_Week7题目：(Candy) ←链接戳这里题目说明： There are N children standing in a line. Each child is assigned a rating value.You are giving candies to these children subjected to the following requirements:-Each

2017-10-16 13:53:51 163

原创 Shortest Palindrome_Week6

Shortest Palindrome_Week6题目：(Shortest Palindrome) ←链接戳这里题目说明： Given a string S, you are allowed to convert it to a palindrome by adding characters in front of it. Find and return the shortest palindr

2017-10-16 09:27:41 196

原创 Product of Array Except Self_Week5

Product of Array Except Self_Week5题目：(Product of Array Except Self) ←链接戳这里题目说明： Given an array of n integers where n > 1, nums, return an array output such that output[i] is equal to the product of a

2017-10-06 09:26:14 163

原创 Valid Sudoku_Week4

Valid Sudoku_Week4题目：(Valid Sudoku) ←链接戳这里题目说明： Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are filled with

2017-09-26 23:14:51 171

原创 Kth Largest Element in an Array_Week3

Kth Largest Element in an Array_Week3题目：(Kth Largest Element in an Array) ←链接戳这里题目说明： Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, n

2017-09-24 10:32:35 173

原创 Search a 2D Matrix II_Week2

Search a 2D Matrix II_Week2题目：(Search a 2D Matrix II) ←链接戳这里题目说明： Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties:Integers in each

2017-09-13 21:52:53 177

原创 Add Two Numbers_Week 1

Add Two Numbers_Week1题目：(Add Two Numbers) ←链接戳这里题目说明： You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes c

2017-09-13 18:51:53 182

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