Nanhua University Database Principles A Course Project Report
【南华大学数据库原理A课程设计报告】是关于一个学生团队在2022学年春季学期完成的超市收银系统的设计项目。该项目由四个成员组成,分别负责不同的任务,如确定数据关系、建立数据库、需求分析和功能设计。他们使用Java技术和JDBC,结合SQL Server 2008来构建数据库,实现对超市进货、销售和库存的有效管理。系统需求分析指出,小型超市收银系统的需求日益增长,因为它能提升工作效率,减少采购成本,优化库存控制。系统主要由登录模块、营业统计模块和商品信息模块构成,各模块既独立又相互配合。在数据库结构设计上,项目进行了概念结构和逻辑结构的设计。概念结构设计中,提到了商品、职工和会员三个主要实体的E-R图,明确了各实体的属性。逻辑结构设计则将E-R图转化为具体的关系模式,如商品信息表、职工表和会员表。每个表都包含了相应的属性字段,如商品的条形码、价格、库存数量,职工的职工号、密码和类型,以及会员的卡号、累积消费金额等。软件结构设计包括概要设计和功能分析。概要设计描绘了系统的总体框架,如职工登陆窗口、管理窗口等,通过不同的账号密码进入不同的操作界面。管理模块包括商品、会员和员工的管理,如商品的添加、删除、修改,会员的添加、删除、更新注册时间,员工的添加、删除、密码更改等。此外,收银业务窗口实现了根据商品条形码查询信息、批量结算、自动计算金额和找零等功能。这个设计项目不仅展示了数据库设计的基本步骤,如E-R图转换、关系模式设计,还涵盖了软件工程中的模块化设计思想和功能实现,为超市的日常运营提供了实用的信息化解决方案。同时,该项目也为后续的数据库课程设计提供了参考,有助于学弟学妹们理解和实践数据库系统的设计与开发。
SQLServer
0
2024-10-31
Inventory Purchase-Sales-Storage Project Table Structure Details
The Inventory Purchase-Sales-Storage Project Table Structure provides a comprehensive breakdown of essential tables, relationships, and data types required for managing inventory operations effectively. Each table aligns with core functionalities such as purchasing, sales tracking, and stock management.
Key Table Structure
Purchase Table: Contains fields like supplier ID, purchase date, item ID, quantity, and purchase price, essential for tracking all procurement activities.
Sales Table: Manages customer ID, sales date, item ID, quantity, and sales price. It ensures detailed tracking of each sale and supports effective revenue management.
Inventory Table: Records item ID, stock quantity, minimum stock level, and reorder level, forming the core of stock management.
Additional Tables
Supplier and Customer Tables: For detailed records of both suppliers and customers.
Transactions Log: Tracks all inventory movements, essential for auditing purposes.
This structure ensures streamlined operations across purchase, sales, and inventory control, with relational links that maintain data integrity and operational efficiency.
Memcached
0
2024-10-25
Color Transfer Between Images using Image Mean Subtraction in MATLAB-DIP Course Project
This project implements the technique of color transfer between images as described in the paper by Erik Reinhard, Michael Ashikhmin, Bruce Gooch, and Peter Shirley. One of the most common tasks in image processing is changing the colors of an image. This article presents a more general color correction method, which borrows color characteristics from one image to apply to another. The algorithm follows these steps:
RGB to ℓαβ color space conversion: The transformation of the RGB color space into the ℓαβ color space, where the ℓ axis represents the lightness channel, and the α and β channels represent the color-opponent yellow-blue and red-green channels, respectively.
Statistical and color correction: First, the mean value is subtracted from each channel's data points. Then, the data points are scaled by factors determined by the standard deviation of each respective channel.
Final conversion to RGB: The result is converted back into the RGB color space.
The MATLAB code for this procedure is contained in the color_transfer_built.m file. In lines 3 and 4 of the file, the source and target variables are modified to change the source and target images for color transfer.
Matlab
0
2024-11-05
Matlab LM Algorithm Code-TIC Information Theory and LM Code Course Snippets
在信息理论与LM代码课程期间,我编写了多个Matlab/Octave代码片段。这些代码涵盖了互信息计算、信道容量模拟及数值积分等内容,具体如下:
assignment01_mutinfo:一个Matlab/Octave函数,给定转换矩阵P和输入符号Px的概率向量,计算并返回互信息I(X; Y)。该函数还提供了多组测试,展示了不同P和Px集合的通道互信息,并输出了3D表面图。
Assignment02_apcap_numint:该脚本用于绘制对足未量化通道、AWGN未量化通道和对足2级量化通道的容量比较。此外,它还包括一个函数,利用不同算法进行确定的数值积分。
Assignment03_noisyap2L:该脚本用于模拟嘈杂环境下的对映体2级传输。
Assignment04_noisyap2LHamm:该脚本使用汉明分组代码,在AWGN通道上模拟对偶2级传输。
Matlab
0
2024-11-06
Data Parity Structure in Exploration Seismology with MATLAB Algorithms
Ⅱ.3.5 Data Parity Structure
Data signals contain parity codes based on the following rules.
Ⅱ.3.5.1 Parity Rules
A 24-byte CRC parity provides protection against undetected destructive errors, with an error probability of ≤ 5.96×10⁻⁸ or about ≤ 0.5 channel byte errors. The CRC word is computed from the given information bits, driving them towards zero. The resulting 24-byte output (p₁, p₂,..., p₂₄) is generated from the information bytes (m₁, m₂,..., m₂₇₆) using a polynomial code. Here, the code bits gi=1 (for positions i=0, 1, 3, 4, 5, 6, 7, 10, 11, 14, 17, 18, 23, and 24) define this code, known as CRC-24Q (Q represents Qualcomm Corporation). The polynomial generator in binary algebraic form is as follows:
[Binary Polynomial Representation]
This polynomial ensures robust data integrity in exploration seismology data transmission processes.
Matlab
0
2024-11-05
NJU_Automation_MATLAB_Course_Materials
南京理工大学自动化系郭毓主讲的课件,包括MATLAB与SIMULINK基础等知识。
Matlab
0
2024-11-04
Implementing PCA Algorithm in MATLAB
本项目建立PCA模型,使得PCA算子可以在任意时刻应用。实现基于MATLAB的PCA算法。
Matlab
0
2024-11-04
Morlet Wavelet MATLAB Code for Muse Project
Morlet小波的MATLAB代码。MuseProject该存储库包含可用于预处理Muse头带的数据,并对其应用ML模型以基于RGB颜色对数据进行分类的代码。editmusefilewithtime.py该文件用于编辑来自缪斯应用程序MIND MONITER的RAW文件。该文件分为多个子文件,这些子文件包含当人们看到红色、绿色和蓝色时的实例数据。由于在我们的案例中,一个实验包含每种颜色的20个试验,因此我们得到了60个csv文件,其中分别有20个文件为红色、绿色和蓝色。musecombinedimage.m为了从数据中获得频谱图图像,我们使用MATLAB。通过应用Morlet小波变换,可以获得每个电极以及电极组合的图像。museexpfinal_lastrun.py该文件用于运行视觉实验。它使用Python的Psychopy库。runmuseapp.sh该Shell脚本运行代码以预处理数据并以可训练的格式获取数据。mlmodelmuse此文件夹具有已应用于数据的模型。随着工作的进展,该存储库将被更新。
Matlab
0
2024-11-04
Surface Plot of Dini's Surface Using Mesh Command in MATLAB
Dini的表面由以下参数方程给出:
x = acos(u)sin(v);y = asin(u)sin(v);z = a(cos(v) + log(tan(0.5v))) + bu;
这些方程使用mesh命令绘制为Surface Plot,可以通过MATLAB代码生成Dini表面的可视化效果。更多细节和背景请参考维基百科链接:Dini's Surface。
Matlab
0
2024-11-06