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59 results about "Logical data model" patented technology

A logical data model or logical schema is a data model of a specific problem domain expressed independently of a particular database management product or storage technology (physical data model) but in terms of data structures such as relational tables and columns, object-oriented classes, or XML tags. This is as opposed to a conceptual data model, which describes the semantics of an organization without reference to technology.

Method and device for protecting network digital multimedia copyright

The embodiment of the invention provides a method and device for protecting network digital multimedia copyright. The method comprises the following steps: acquiring an LDM (Logical Data Model) of an authorization transfer message; carrying out signature verification on the LDM by using a public key of an issuer; after verifying the signature verification, decrypting the LDM by using a private key of playing equipment so as to extract content decryption keys from the LDM; and decrypting corresponding decrypted multimedia files by using the content decryption keys. The device comprises a message acquisition unit, a signature verification unit, a message extraction unit and a file decryption unit, wherein the message acquisition unit is used for acquiring the LDM of the authorization transfer message, the signature verification unit is used for carrying out signature verification on the LDM by using the public key of the issuer, the message extraction unit is used for decrypting the LDM by using the private key of the playing equipment so as to extract the content decryption keys from the LDM after verifying the signature verification, and the file decryption unit is used for decrypting the corresponding decrypted multimedia files by using the content decryption keys. The invention provides a secure and strict key transfer manner so as to guarantee that a security protection mechanism is fully realized.
Owner:雷欧尼斯(北京)信息技术有限公司

Construction realization method of provincial ITS (Intelligent Transportation System) big data cloud processing center based on LDM3 (Logical Data Model <3>)

The invention discloses a construction realization method of a provincial ITS (Intelligent Transportation System) big data cloud processing center based on an LDM3 (Logical Data Model <3>). The method realizes hierarchic data acquisition, processing and information serving based on an LDM3 transportation system frame; the provincial ITS big data cloud processing center comprises external field equipment, a transportation data cloud processing center and service interfaces; and the transportation data cloud processing center is provided with hierarchic databases and application servers. According to the method, a big data cloud processing realization method of provincial intelligent transportation data acquisition, transmission, storage, processing and serving is provided; a three-dimensional information network framework LDM3 comprising information convergence layers and application layers which are located in parallel on a logic top layer is constructed; applications in the application layers achieve information exchange and resource sharing by utilizing the three-dimensional information network framework LDM3; and a patching interactive mode arranging a large amount of middleware is discarded.
Owner:NANJING UNIV

Restful service development method and device based on SSM framework

The invention discloses a Restful service development method and device based on an SSM framework. The method comprises the steps of communication protocol and format definition, data verification, exception handling, basic control implementation class, basic service interface and implementation class, implementation of calling logic among a control layer, a service layer and a persistent layer, and a corresponding relation between a data model and a function module; packaging data and tools; defining a template file of the target code file, generating a code file according to the template file, and generating a data model and a persistent layer code, wherein according to the basic module, the tool module and the code generation module, function management is achieved, codes of a configuration file, a data model and a persistent layer and codes of a service layer and a control layer are automatically generated, basic data verification is added to a data model field, and query conditions of the service layer are modified; and respectively modifying interfaces of corresponding function management according to different requirements of each function management. The development and maintenance efficiency of the application service is improved, and the development threshold of the application service is reduced.
Owner:GUANGDONG GUANGYU SCI & TECH DEV
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