Posted on Categories:Data Modeling, 数据建模代写, 数据科学代写

# 数据科学代写|数据建模代考DATA MODELING代考|INFO4707 Conceptual Data Model Explanation

avatest.org数据建模Data Modeling代写，免费提交作业要求， 满意后付款，成绩80\%以下全额退款，安全省心无顾虑。专业硕 博写手团队，所有订单可靠准时，保证 100% 原创。avatest.org™， 最高质量的数据建模Data Modeling作业代写，服务覆盖北美、欧洲、澳洲等 国家。 在代写价格方面，考虑到同学们的经济条件，在保障代写质量的前提下，我们为客户提供最合理的价格。 由于统计Statistics作业种类很多，同时其中的大部分作业在字数上都没有具体要求，因此数据建模Data Modeling作业代写的价格不固定。通常在经济学专家查看完作业要求之后会给出报价。作业难度和截止日期对价格也有很大的影响。

avatest.org™ 为您的留学生涯保驾护航 在数据科学代写方面已经树立了自己的口碑, 保证靠谱, 高质且原创的数据科学代服务。我们的专家在数据建模Data Modeling代写方面经验极为丰富，各种数据建模Data Modeling相关的作业也就用不着 说。

avatest™

## 数据科学代写|数据建模代考DATA MODELING代考|Conceptual Data Model Explanation

A concept is a key idea that is both basic and critical to your audience. “Basic” means this term is probably mentioned many times a day in conversations with the people who are the audience for the model. “Critical” means the business would be very different or nonexistent without this concept.

The majority of concepts are easy to identify and include ideas that are common across industries, such as Customer, Employee, and Product. An airline may call a Customer a Passenger, and a hospital may call a Customer a Patient, but in general they are all people who receive goods or services. Each concept will be shown in much more detail at the logical and physical phases of design. For example, the Customer concept might encompass the logical entities Customer, Customer Association, Customer Demographics, Customer Type, and so on.

Many concepts, however, can be more challenging to identify, as they may be concepts to your audience but not to others in the same department, company, or industry. For example, Account would most likely be a concept for a bank and for a manufacturing company. However, the audience for the bank conceptual data model might also require Checking Account and Savings Account to be on their model, whereas the audience for the manufacturing conceptual data model might, instead, require General Ledger Account and Accounts Receivable Account to be on the model.

In our publishing data model, for example, an audience that needs to see the entire company on a conceptual may just require the entity Order, yet in communicating with the sales department, the Sales Conceptual Data Model will have more details, showing not only Order but also Order Line and Order Adjustment.

## 数据科学代写|数据建模代考DATA MODELING代考|Relational and Dimensional Conceptual Data Models

Recall from this section’s introduction that relational data modeling is the process of capturing how the business works by precisely representing business rules, while dimensional data modeling is the process of capturing how the business is monitored by precisely representing navigation. There are both relational and dimensional conceptual data models.
Relational CDM Example
The relational conceptual model includes concepts, their definitions, and the relationships that capture the business rules binding these concepts. Unlike the logical and physical data models, as we will see, conceptual models may contain many-to-many relationships. For example, Figure $8.2$ contains part of a financial relational CDM.

Business Rules (listed in the order we would typically walk someone through the model):
Each Customer may own one or many Accounts.
Each Account must be owned by one or many Customers.
Each Account may contain one or many Account Balances.
Each Account Balance must belong to one Account.
Notice that in this example definitions were not displayed directly on the diagram as on the model in Figure 8.1. I find that if the data model is small enough (and the definitions are short enough), it can be a valuable communication tool to display the definitions on the diagram. I also choose to display the definitions when I need to highlight poor or lacking definitions or definitions that I know will spur debate.

## MATLAB代写

MATLAB 是一种用于技术计算的高性能语言。它将计算、可视化和编程集成在一个易于使用的环境中，其中问题和解决方案以熟悉的数学符号表示。典型用途包括：数学和计算算法开发建模、仿真和原型制作数据分析、探索和可视化科学和工程图形应用程序开发，包括图形用户界面构建MATLAB 是一个交互式系统，其基本数据元素是一个不需要维度的数组。这使您可以解决许多技术计算问题，尤其是那些具有矩阵和向量公式的问题，而只需用 C 或 Fortran 等标量非交互式语言编写程序所需的时间的一小部分。MATLAB 名称代表矩阵实验室。MATLAB 最初的编写目的是提供对由 LINPACK 和 EISPACK 项目开发的矩阵软件的轻松访问，这两个项目共同代表了矩阵计算软件的最新技术。MATLAB 经过多年的发展，得到了许多用户的投入。在大学环境中，它是数学、工程和科学入门和高级课程的标准教学工具。在工业领域，MATLAB 是高效研究、开发和分析的首选工具。MATLAB 具有一系列称为工具箱的特定于应用程序的解决方案。对于大多数 MATLAB 用户来说非常重要，工具箱允许您学习应用专业技术。工具箱是 MATLAB 函数（M 文件）的综合集合，可扩展 MATLAB 环境以解决特定类别的问题。可用工具箱的领域包括信号处理、控制系统、神经网络、模糊逻辑、小波、仿真等。