The process of building a system model is also called modeling. Modeling is an important means and premise to study the system. Any process in which a model is used to describe the causality or interrelation of a system belongs to modeling. Because of the different relationships described, there are various ways to realize this process. Through the analysis of the motion law of the system itself, the model can be established according to the mechanism of things; It can also be modeled by processing the experimental or statistical data of the system and based on the existing knowledge and experience about the system. You can also use several methods at the same time
Question 2: What is software modeling? Software analysis modeling embodies the idea of software design and builds a bridge between system requirements and system implementation. According to the model established by designers, software engineers develop software systems that meet the design objectives, and the maintenance and improvement of software are also based on software analysis models.
With the in-depth study of software engineering theory and the continuous development of software technology, software analysis and modeling are becoming more and more perfect. Although the modeling work of different software analysis and modeling platforms is different, software analysis and modeling can be roughly divided into three categories, namely business modeling, data modeling and application modeling.
Question 3: What is mathematical modeling? I won't elaborate on the detailed definition of online mathematical modeling, but say something else ~ ~
The main development direction of mathematics is the combination of mathematics and calculation. Combining mathematical algorithms with computer technology to solve practical problems, you will learn by going up one flight of stairs from computer in the future, because your algorithm is more advanced than theirs. This is the main survey of the mathematical modeling competition.
The gold content of mathematical model competition is also relatively high. You won the ranking in the competition, which can completely prove that you have certain strength ~ ~
You don't need to worry about your poor math scores. I have participated in several competitions, and my knowledge of mathematics is not very advanced. High school mathematics can solve many problems, mainly optimization and simulation. I think it is more important to test one's thinking ability. Besides, you only need one specialty in math, computer and writing ~ ~
If you take part in the competition, you will really gain a lot and learn a lot of new knowledge. In this way, you can know that what you have learned can be used in your life, thus stimulating your interest in learning. Really, I strongly recommend you to learn some ~ ~ to participate in the competition ~ ~ If you have any other questions to ask, hehe ~ ~ I have done modeling and writing, and my programming is similar ~ ~
Question: What does modeling mean in 3dmax? 3Dmax is 3d software.
Use it to build a three-dimensional model (the interface is shown below)
This software is often used in 3D animation, architectural design, product design, etc.
Question 5: What is information modeling? In information integration, data is usually subject-oriented organization. The theme is to merge the abstraction of the data in the enterprise information system at a higher level, which is a complete and consistent description of the data of the analysis object and reflects the data of the analysis object and their relationship. According to the requirements of analysis, by summarizing the analysis objects in various analysis fields, synthesizing various topics, and then observing the relevant information in each application subsystem from the perspective of each topic, the external form of topic flow is screened out, and its static content is grasped, and the basic content of each topic is gradually established, that is, the mode of the topic and the attributes and data variables involved, so as to determine the topic.
In information integration, data is usually subject-oriented organization. The theme is the abstraction of merging the data in the enterprise information system at a higher level, which is a complete and consistent description of the data of the analysis object and reflects the data of the analysis object and their relationship. According to the requirements of analysis, by summarizing the analysis objects in various analysis fields, synthesizing various topics, and then observing the relevant information in each application subsystem from the perspective of each topic, the external form of topic flow is screened out, and its static content is grasped, and the basic content of each topic is gradually established, that is, the mode of the topic and the attributes and data variables involved, so as to determine the topic.
The theme includes two aspects:
The intrinsic information of the theme is the description information of the attributes of the theme, such as the color, category, origin, type of goods, etc. The business information of the theme is a description of the information flowing in various businesses, such as the sales information of goods and the employee information of goods. Topic-oriented data organization is to rebuild the original relational model of application organization in a topic-oriented way. According to the determined theme and its model, it extracts the corresponding data from the application-oriented subsystem to form a globally consistent enterprise model and information about the theme, thus analyzing the relevant information of the theme and observing the original data from the perspective of the theme. In information integration, topics are usually realized by a set of relational tables.
At present, there are two data modeling methods that can meet the needs of information integration data modeling: entity relationship model, dimension model and ERM model. ERM is an extraction tool, because it can be used to understand and simplify fuzzy data relations in business fields and complex system environments. Figure 1 shows a simple ERM. ERM modeling method can use the following two basic concepts to generate data models in specific fields:
entity
Relationship between entities
Entities can be defined as people, places, things and related events of enterprises or organizations, such as products, as shown in figure 1. Entities represent a kind of things, which can be observed and classified according to their properties and characteristics in the real world.
The structural interrelation and association between entities in the relational description model show the correlation between entities. For example, in figure 1, the arrow points from the product to the order. The numbers at both ends of the arrow define the cardinality of the relationship, which in this case is 1 to n (or 1 to many).
Question 6: What is modeling and simulation modeling? Should be building a model, that is, a framework, not paying much attention to details; Simulation, high fidelity, although also a model, but pays great attention to details, lifelike, closer to real life.
Question 7: What does 7:3D modeling mean? 3D: the abbreviation of 3dmax, which is the most famous 3D animation software in the world. Its nearly perfect performance in 3D modeling, animation and rendering can fully meet the requirements of readers for making high-quality rendering, animation and games.
Style: 1. Describe the behavior of the system with a computer. For example, spreadsheet programs can be used to process financial data and represent company behavior; Make a business plan; Evaluate the possible impact of the company's business changes. See simulation, spreadsheet program. Use users to describe the behavior of the system. For example, spreadsheet programs can be used to process financial data representing company activities; Make business forecast; Or evaluate the impact of the proposed changes on the company's operations.
2. Use computers to describe objects and their spatial relationships mathematically. For example, a computer-aided design (CAD) program can generate objects on the screen, use equations to generate lines and shapes, and accurately place them according to their relationship with each other and their two-dimensional or three-dimensional space.
3. Application and data modeling is the process of determining, recording and realizing the data and process requirements of the application. This includes looking at existing data models and processes to determine whether they can be reused, and creating new data models and processes to meet the unique needs of applications.
The main activities in the modeling process include:
Determine the data and its related processes (in fact, the salesperson needs to check the online product catalog and submit a new customer order).
Define data (such as data type, size and default value).
Ensure data integrity (using business rules and validation checks).
Define operating procedures (such as security check and backup).
Select a data storage technology (such as relational, hierarchical or indexed storage technology).
It is important to know that modeling usually involves the management of a company in unexpected ways. For example, when new ideas emerge about which data elements should be maintained by which organizations, data ownership (and the implied responsibility for data maintenance, accuracy and timeliness) is often questioned. Data design often makes companies realize how interdependent enterprise data systems are, and encourages companies to seize the efficiency improvement, cost saving and strategic opportunities brought by collaborative data planning.
At the end of modeling, you have completely defined the requirements of the application, identified the data and services that may be reused by other enterprise applications, and laid a solid foundation for future expansion.
Question 8: What is data modeling? Data modeling refers to the abstract organization of all kinds of data in the real world, determining the scope of the database and the organization form of the data until it is transformed into a real database.
The process of establishing database entities and their relationships in visio or erwin after transforming the conceptual model abstracted from system analysis into a physical model? (Entities are generally tables).
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