Abstract: A method and system for key knowledge point recommendation are provided, the method comprising calculating knowledge point relationship strengths of knowledge points in a set of knowledge points; calculating weights for knowledge points according to the knowledge point relationship strengths of knowledge points in the set of knowledge points, and storing the knowledge points and weights correspondingly; determining key knowledge points according to the weights of the knowledge points and recommending the key knowledge points to a user.

Abstract: The present invention provides a semantic information acquisition method and system, and corresponding keyword expansion and search methods and systems, comprising: searching for, then classifying an article; then, performing word segmentation according to the classified article to obtain the words in said category, and setting said category and words to serve as the semantic information of the keyword; also, a method and system using the semantic information acquisition method to expand a keyword, and a method and system using keyword expansion to perform a search. The described semantic information acquisition method effectively avoids the technical problems in the prior art of only being able to obtain semantic information of English vocabulary; and it also being impossible to classify semantic information based on category information. The invention is particularly suitable for searching using a keyword, searching a large number of texts, and organizing large amounts of related data and information.

Abstract: A method and system for obtaining a knowledge point implicit relationship are provided; first, establishing a knowledge point explicit relationship map according to knowledge point explicit relationship strengths; second, computing according to said knowledge point explicit relationship map a simple path set of two knowledge points; then, computing the implicit relationship strength values corresponding to each simple path in said simple path set; further, comparing the relationship strength values of the simple paths and setting as the significant implicit relationship strength value the simple path relationship strength having the largest value also greater than a preset threshold value.

Abstract: The present application discloses a method and an apparatus for obtaining structured information in a fixed layout document to improve the structuring speed for information management of a fixed layout document. The method may comprise: determining initial page number information corresponding to current directory entry of the document; segmenting first article content of a page corresponding to the initial page number information into at least one structured-characters-block; searching in each structured-characters-block for a first structured-characters-block which matches with name strings of the current directory entry, and obtaining first position information about where the first structured-characters-block is located in the first article content; and obtaining initial position information of the current directory entry and end position information of the previous directory entry based on the first position information.

Abstract: A logic process apparatus for composite graphs in a fixed layout document is provided in this invention. The apparatus includes a composite graph block extraction unit, for extracting composite graph blocks from the fixed layout document, a document parsing unit, for parsing the fixed layout document to obtain text primitives contained therein, a legend primitive extraction unit, for extracting legend primitives from the text primitives, a correlation detection unit, for detecting correlations between the composite graph blocks and the legend primitives, and a correlation storage unit, for storing the detected correlations. A logic process method for composite graphs in a fixed layout document is also provided.

Abstract: The present invention provides an apparatus for logically processing a composite graph in a formatted document, the apparatus comprising: a composite graph block extraction unit, used to extract a composite graph block in the formatted document; a document parsing unit, used to parse the formatted document to obtain a text element contained therein; a cutline element extraction unit, used to extract a cutline element from the text element; a correlativity detection unit, used to detect correlativity between the composite graph block and the cutline element; a correlativity storage unit, used to store the detected correlativity. The present invention also provides a method for logically processing a composite graph in a formatted document. According to the technical scheme disclosed in the present invention, it is easily achieve layout understanding of the composite graph in a graph-text mixed layout of the formatted document, so as to avoid a logical error.

Abstract: The present invention provides an apparatus for logically processing a composite graph in a formatted document, the apparatus comprising: a composite graph block extraction unit, used to extract a composite graph block in the formatted document; a document parsing unit, used to parse the formatted document to obtain a text element contained therein; a cutline element extraction unit, used to extract a cutline element from the text element; a correlativity detection unit, used to detect correlativity between the composite graph block and the cutline element; a correlativity storage unit, used to store the detected correlativity. The present invention also provides a method for logically processing a composite graph in a formatted document. According to the technical scheme disclosed in the present invention, it is easily achieve layout understanding of the composite graph in a graph-text mixed layout of the formatted document, so as to avoid a logical error.

Abstract: An apparatus and method for document format conversion. The apparatus includes a document parsing unit for parsing a fixed layout document to acquire path primitives of the document; a path grouping unit for dividing the path primitives into groups to generate path groups; a font file generating unit for acquiring path groups that are used to represent characters and generating font files corresponding to the path groups, wherein if there are two or more path groups representing the same character, only one font file is generated and associated with the multiple path groups representing the same character; a document generating unit for generating a converted document using all font files that have been generated. With the above, the problem of data redundancy in fixed layout documents is solved; further, the incorrect rending in reflowing processes may be solved to achieve better display effects.

Abstract: An apparatus for preventing replay attacks and a method for preventing replay attacks are provided in this invention, wherein the apparatus for preventing replay attacks comprises: an acquisition unit for, when a request for operating a digital content is received, acquiring current location information of a set of placeholder files; a determination unit for determining whether the current location information is consistent with recorded location information of the placeholder file; a protection unit for, when inconsistent as determined by the determination unit, wherein there is a correspondence between the digital content and the set of placeholder files.

Abstract: Apparatus for optimizing the description of contents in a layout document is disclosed. The apparatus comprises: a parsing unit, for parsing the content of an original layout document to obtain text graphic unit data; an identification unit, for identifying text properties of each character of the text graphic unit data; a text node classification unit, for classifying characters of the text graphic unit data according to the text properties, and saving characters with the same text properties to the same text node along with the same text properties; a text content node classification unit, for, with respect to characters saved in each text node, saving characters on the same line or column. A terminal and a method for optimizing the description of contents in a layout document are disclosed.

Abstract: Provided is a table recognizing method, comprising: parsing and analyzing metadata information in an original fixed-layout document, and extracting basic elements on a page of the document; segmenting the basic elements, extracting segmented text lines on the page, and acquiring fragments; constructing an undirected graph with respect to each of the fragments; extracting an image on the page, detecting intersection points of horizontal lines and vertical lines, detecting an external bounding box of the intersection points, and taking whether the segmented text lines fall within the external bounding box as local relationship features; training a learning model according to the local relationship features, local features of the fragments, and neighborhood relationship features among the fragments, acquiring model parameters, and establishing a table recognizing model; and invoking the table recognizing model to perform table recognizing for the document, and acquiring a recognizing result.

Abstract: A list recognizing method and system, which comprises: parsing and analyzing metadata information within an original fixed-layout document, and extracting basic elements within a page; segmenting the basic elements, extracting segmented text lines within the page to obtain fragments; building an undirected graph with respect to the fragments; detecting indent features of a bullet according to features of the basic elements; training a learning model according to the indent features, local features of the fragments and neighborhood relation features among the fragments, obtaining model parameters, and establishing a list recognizing model; and invoking the list recognizing model to perform list recognizing on the required document, so as to get recognition result.

Abstract: Provided is a table recognizing method, comprising: parsing and analyzing metadata information in an original fixed-layout document, and extracting basic elements on a page of the document; segmenting the basic elements, extracting segmented text lines on the page, and acquiring fragments; constructing an undirected graph with respect to each of the fragments; extracting an image on the page, detecting intersection points of horizontal lines and vertical lines, detecting an external bounding box of the intersection points, and taking whether the segmented text lines fall within the external bounding box as local relationship features; training a learning model according to the local relationship features, local features of the fragments, and neighborhood relationship features among the fragments, acquiring model parameters, and establishing a table recognizing model; and invoking the table recognizing model to perform table recognizing for the document, and acquiring a recognizing result.

Abstract: Embodiments of the present invention provide a layout analysis method, comprising: extraction, collection of basic elements with respect to static area objects, analysis sequence determination and logical paragraph analysis, wherein the logical paragraph analysis comprises character analyzing, logical connection edge generating, line forming analyzing, paragraph forming analyzing, paragraph result filtering, basic elements collecting with respect to the dynamic area objects and basic element removing. According to the embodiments of the present invention, logical reference information and basic element data information are combined, and the logical reference information is fully used during layout analysis, such that a more accurate layout analysis result with respect to a fixed-layout document is acquired, and the layout analysis result is effectively improved.

Abstract: The present invention provides a DRM method and system for supporting offline sharing of digital resources. When a client applies for joining in a domain, the client sends its own device information to a server, and obtains feature data of the domain by receiving a sharing certificate sent by the server. Wherein, the sharing certificate is created by encrypting the feature data of the domain by using the equipment information of the client as a cipher. The client decrypts the sharing certificate by using its own equipment information to obtain the feature data. Since the feature data has already been obtained in the procedure of applying for joining the domain, a client is able to use the digital resources by using the feature data even if the client cannot connect to network, thus, an advantage of supporting offline sharing of digital resources is achieved.

Abstract: The present application provides a terminal, a server and a digital content authorization method. The terminal comprises: an extracting unit, configured to extract identification information of the terminal when the terminal requests an authorization for a designated layer of content of digital contents from a server; a transceiver unit, configured to transmit the identification information of the terminal to the server and receive an authorization certificate and the designated layer of content of the digital contents from the server; and a decryption unit, configured to decrypt the designated layer of content of the digital contents based on the identification information and the authorization certificate. Embodiments of the present invention may support the copyright protection by using layered encryption technique. The digital content cannot be read only by copying so as to enhance the protection of the digital contents.

Abstract: The present invention provides a server, a terminal and a data pushing method. The server comprises a request receiving unit configured to receive request information from at least one terminal and a pushing instruction from another server; a request generating unit configured to parsing the pushing instruction so as to obtain information of data associated with the terminal and generate a pushing request according to the information of the data associated with the terminal; and a request transmitting unit configured to transmit the pushing request to the terminal and transmit the request information to the other server, so that the other server determines the information of the data and generates the pushing instruction according to the request information.

Abstract: The present invention provides a character conversion system, comprising: a parsing unit, used to parse received data, determine at least one character contained in the data, and obtain property information corresponding to each character of the at least one character; a judging unit, used to, with respect to each character, determine a pattern bitmap of the character according to the property information, and judge whether the pattern bitmap satisfies a preset condition; a conversion unit, used to, if the judging unit judges that the preset condition is satisfied, determine an original inner code of the character according to the property information, and convert the character according to the original inner code; and if the judging unit judges that the preset condition is not satisfied, identify an actual inner code of the character according to the pattern bitmap, and convert the character according to the actual inner code.

Abstract: The present invention provides a server comprising: a selection unit configured to select a target content from each digital file among a plurality of digital files according to a selection instruction received from a terminal; an extraction unit configured to extract privilege information corresponding to the target content from file key information corresponding to each digital file among the plurality of digital files, so as to obtain a plurality of privilege information; an authorization information generation unit configured to generate authorization information according to the plurality of the privilege information; and a processing unit configured to, when an authorization request is received from the terminal, transmit the authorization information to the terminal so that the terminal performs predetermined operations on the target content according to the authorization information. The present invention further provides a terminal and a digital copyright management method.

Abstract: System for authorization and authentication comprises a server and at least one level of transit terminals. The server transmits digital content, server's identifier, and business pattern to the transit terminal. The transit terminal transmits to a lower level transit terminal the digital content, the server's identifier, the business pattern, and identifiers of respective transit terminals through which the digital content passes, and returns the above identifiers to the server. The server performs a match verification on the returned identifiers; if matched, the transit terminal is permitted to parse the business pattern and authorize a client to use the digital content based on privilege in the business pattern.