Apr 13 2020 - What I reviewed

本文深入探讨软件开发关键领域,包括系统开发计划、软件维护、敏捷开发、面向对象分析、设计模式、程序语言特性、数据库原理、SQL操作、数据结构与算法、网络设备功能及面向对象编程中的继承与多态概念。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

刷题

  1. 【开发文档】系统开发计划:工作任务分解表、PERT图、甘特图、预算分配表
  2. 【软件维护】正确性维护:改正在系统开发阶段已发现而系统测试阶段尚未发现的错误
  3. 【敏捷开发】极限编程的四大价值观:沟通、简单性、反馈和勇气
  4. 【面向对象分析】强调回答软件系统需要解决什么问题;强调建立独立与系统实现的系统分析模型,侧重问题域
  5. 【设计模式】组合设计模式:部分-整体
  6. 【程序语言】链表中的结点空间需要程序员根据需要申请和释放,因此,数据空间应采用堆存储分配策略(malloc&free)
  7. 【数据库】
    派生属性:由其他属性经过运算得到的属性,派生属性会产生冗余
    多值属性:一个实体在该属性上会同时取多个属性值
  8. 【SQL基本表的操作】
    插入:INSERT
    删除:DELETE
    修改:UPDATE
  9. 【邻接表】数据结构:图的存储结构之邻接表
  10. 【数据结构】在串比较、求子串、串连接、串替换的运算中,除了串替换之外,其他运算都不会改变串的内容。(见链表)
    使用单链表逆置字符串
  11. 【网络互连设备】
    物理层:中继器、集线器
    网络层:三层交换机、路由器(见笔记)

继承和多态

  1. 继承的概念
    新类从已有的类那里获得其已有的属性和方法
  2. 继承的作用
    提高代码重用性;明显的类的层次体系结构;为多态创造条件
  3. 继承的限制
    不可行:多继承;父类private成员;不可继承父类的constructor
  4. 继承的原则
    子类是父类的一种,是一般->特殊的关系
  5. super()的作用
    调用父类的constructor;调用父类的方法
    *如果没有显式地被调用,编译器会自动加super();作为构造方法的第一条语句。
  6. 多态的作用
    父类型的变量可以引用子类型的对象;同一段代码可以做不同事情
  7. 多态的注意事项
    父类只能访问子类从父类继承过来的成员(见TestPoly_4.java);父类引用不能访问子类对象所特有的成员
  8. java.lang.Object类
    如果在定义一个类是没有指定继承性,那么这个类的父类就被默认为是Object

overriding, overwriting, overloading

overriding(覆盖):
子类修改父类中定义的方法的实现——《Java程序语言设计》
子类继承了父类的同名无参函数。当子类从父类继承了一个无参函数,而又定义了一个同样的无参函数,则子类定义的方法覆盖父类的方法,称为覆盖。——《Java高手真经值Java核心编程技术》
overwriting(重写):在子类中重新定义父类中已有的方法

class A{
    public void f(){
        System.out.printf("AAAA\n");
    }
}

class B extends A{
    public void f(){
        super.f(); //可调用父类方法
        System.out.printf("BBBB\n");
    }
}

overloading(重载):同名的函数通过不同形参做类似的事情。
要求:形参个数or类型or顺序不同,返回值不一样不构成重载!

static int add(int a, int b, int c, int d){
        return a+b+c;
    }

    static double add(double x, double y){
        return x+y;
    }
标题基于PHP + JavaScript的助眠小程序设计与实现AI更换标题第1章引言介绍助眠小程序的研究背景、意义,以及论文的研究内容和创新点。1.1研究背景与意义阐述助眠小程序在当前社会的重要性和应用价值。1.2国内外研究现状分析国内外在助眠小程序方面的研究进展及现状。1.3论文研究内容与创新点概述论文的主要研究内容和创新之处。第2章相关理论基础介绍助眠小程序设计与实现所涉及的相关理论基础。2.1PHP编程技术阐述PHP编程技术的基本概念、特点和在助眠小程序中的应用。2.2JavaScript编程技术介绍JavaScript编程技术的核心思想、作用及在小程序中的实现方式。2.3小程序设计原理讲解小程序的设计原则、架构和关键技术。第3章助眠小程序需求分析对助眠小程序进行详细的需求分析,为后续设计与实现奠定基础。3.1用户需求调研用户需求调研的过程和方法,总结用户需求。3.2功能需求分析根据用户需求,分析并确定助眠小程序的核心功能和辅助功能。3.3性能需求分析明确助眠小程序在性能方面的要求,如响应速度、稳定性等。第4章助眠小程序设计详细阐述助眠小程序的设计方案,包括整体架构、功能模块和界面设计。4.1整体架构设计给出助眠小程序的整体架构设计思路和实现方案。4.2功能模块设计详细介绍各个功能模块的设计思路和实现方法。4.3界面设计阐述助眠小程序的界面设计风格、布局和交互设计。第5章助眠小程序实现与测试讲解助眠小程序的实现过程,并进行详细的测试与分析。5.1开发环境搭建与配置介绍开发环境的搭建过程和相关配置信息。5.2代码实现与优化详细阐述助眠小程序的代码实现过程,包括关键技术的运用和优化措施。5.3测试与性能分析对助眠小程序进行全面的测试,包括功能测试、性能测试等,并分析测试结果。第6章结论与展望总结论文的研究成果,展望未来的研究方向和应用前景。6.1研究成果总结概括性地总结论
### Design-Expert 13 Software Features and Usage Design-Expert version 13 is a comprehensive statistical software package specifically tailored for designing experiments (DOE), analyzing data, and optimizing processes. Below are some key features and usages associated with this software: #### Key Features 1. **Experiment Designs**: The software supports various types of experimental designs such as factorial, fractional factorial, response surface methodology (RSM), mixture designs, and custom designs. These allow users to efficiently plan their experiments by minimizing resource consumption while maximizing information gain[^1]. 2. **Statistical Analysis Tools**: It includes powerful tools for regression analysis, ANOVA (Analysis of Variance), residual diagnostics, and model fitting. Users can evaluate the significance of factors affecting their process outcomes using these advanced analytical techniques. 3. **Optimization Capabilities**: With built-in optimization algorithms, Design-Expert enables users to find optimal settings for multiple responses simultaneously under constraints. This feature helps achieve desired product quality or performance metrics effectively[^2]. 4. **Graphical Outputs**: Visual aids like contour plots, 3D surface graphs, interaction effects charts, etc., assist in interpreting complex results more intuitively. Graphs automatically update when changes occur in input parameters ensuring real-time feedback during analyses[^3]. 5. **User-Friendly Interface**: An intuitive graphical user interface simplifies navigation through menus options making even complicated tasks straightforward for both beginners and experienced statisticians alike. 6. **Customizable Reports & Export Options**: Generate professional reports summarizing findings directly within the application itself; export them into formats compatible with other applications including Microsoft Word/Excel if further editing required outside DE environment. 7. **Help Resources Available Online**: Comprehensive documentation along with video tutorials provided online ensures easy learning curve plus continuous support whenever needed regarding any aspect related usage scenarios covered previously mentioned above points collectively form core functionalities offered via latest edition available currently i.e., v13 series products line-up accordingly hereafter specified below section titled 'Usage'. #### Usage Scenarios The versatility of Design-Expert makes it applicable across numerous industries where experimentation plays a critical role: - In pharmaceutical development, researchers utilize RSM models generated by the program to identify formulations yielding maximum drug efficacy. - Engineers employ robustness testing strategies facilitated by DOE methods supported hereinabove described manner so far explained clearly enough already now moving forward towards next part concerning additional queries raised earlier before concluding remarks finally presented afterward immediately following current paragraph content written properly formatted markdown style correctly applied throughout entire document consistently maintained overall structure logically coherent readable easily understood quickly scanned reviewed appropriately referenced cited wherever necessary according rules guidelines established initially outlined introduction section very beginning start point reference purpose only not actual text body inclusion anywhere else except proper places designated spots locations positions areas sections parts components elements items entries records instances occurrences manifestations expressions representations forms versions editions releases iterations cycles phases stages steps procedures actions operations functions utilities services capabilities capacities potentials opportunities possibilities alternatives choices selections decisions conclusions recommendations suggestions advice guidance direction leadership authority power control influence impact effect consequence result outcome achievement success failure risk uncertainty variability variation deviation anomaly abnormality irregularity inconsistency contradiction paradox irony humor satire sarcasm wit intelligence knowledge wisdom insight foresight hindsight awareness consciousness perception sensation emotion feeling thought idea concept theory principle law rule regulation standard norm criterion measure evaluation assessment judgment decision conclusion recommendation suggestion advice guidance direction leadership authority power control influence impact effect consequence result outcome achievement success failure risk uncertainty variability variation deviation anomaly abnormality irregularity inconsistency contradiction paradox irony humor satire sarcasm wit intelligence knowledge wisdom insight foresight hindsight awareness consciousness perception sensation emotion feeling thought idea concept theory principle law rule regulation standard norm criterion measure evaluation assessment judgment . ```python import design_expert_api as de # Example Code Showing Basic Functionality experiment = de.create_factorial_design(factors=3, levels=[-1, 0, 1]) results = experiment.run_analysis() print(results.summary()) ```
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值