information retrieval
1. Information retrieval in a broad sense refers to the technology of organizing and storing information in a certain way, and then finding specific information according to user needs, so the full name is information storage and retrieval.
2. Information retrieval in a narrow sense only refers to the part where users find specific information, that is, the process of using existing search tools or databases to find specific information according to the user's retrieval needs.
3. The main methods of information retrieval: full-text retrieval, field retrieval, content-based multimedia retrieval, and data mining.
4. Commonly used technologies for information retrieval include Boolean logic retrieval technology, truncation retrieval technology, proximity retrieval technology, limited field retrieval technology, restricted retrieval technology, etc.
Database security
Database security refers to protecting the database from data leakage, alteration or damage caused by illegal use.
Integration basics
1. The content of system integration includes the integration of technical environment, integration of data environment and integration of applications.
2. The basic principles that need to be followed in technology include: openness, structure, advancement and mainstreaming.
data integration
1. Data integration is to logically integrate relevant information from participating databases into a global conceptual model belonging to a heterogeneous distributed database to achieve the purpose of information sharing.
2. The main object of data integration processing is the data in various heterogeneous databases in the system. Data warehouse technology is the key to data integration.
3. Data integration can be divided into four levels: basic data integration, multi-level view integration, schema integration and multi-granularity data integration.
Software integration
Software component standards: Common Object Request Broker Architecture (CORBA), COM, DCOM and COM+, . NET, J2EE application architecture and other standards.
The Object Management Group (OMG) is the developer of the CORBA specification. The purpose of OMG is to integrate object and distributed system technologies into a unified interoperable structure that supports both existing platforms and future platform integrations. CORBA is the basis for OMG's standardized distributed object computing.
An object in COM is a binary code object, and its code form is DLL or EXE execution code.
COM+ is more closely integrated with the operating system.
Project Overview
In order to discuss information security systems engineering, we need to distinguish several terms and understand the relationship between them, including: information system, business application information system, information security system, information system engineering, business application information system engineering and information security system engineering wait.