Patents by Inventor Chaochun Liu

Chaochun Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11494615
    Abstract: Described herein are embodiments for systems and methods to incorporate skip-gram convolution to extract non-consecutive local n-gram patterns for comprehensive information for varying text expressions. In one or more embodiments, one or more recurrent neural networks are employed to extract long-range features from localized level to sequential and global level via a chain-like architecture. Comprehensive experiments on large-scale datasets widely used for the text classification task were conducted to demonstrate the effectiveness of the presented deep skip-gram network embodiments. Performance evaluation on various datasets demonstrates that embodiments of the skip-gram network are powerful for general text classification task set. The skip-gram models are robust and may be generalized well on different datasets, even without tuning the hyper-parameters for specific dataset.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: November 8, 2022
    Assignee: Baidu USA LLC
    Inventors: Hongliang Fei, Chaochun Liu, Yaliang Li, Ping Li
  • Patent number: 11194860
    Abstract: Systems and methods are disclosed for question generation to obtain more related medical information based on observed symptoms from a patient. In embodiments, possible diseases associated with the observed symptoms are generated by querying a knowledge graph. In embodiments, candidate symptoms associated with the possible diseases are also identified and are combined with the observed symptoms to obtain combined symptom sets. In embodiments, discriminative scores for the candidate symptom sets are determined and candidate symptoms with top discriminative scores are selected. In embodiments, these selected candidate symptoms may be checked for conflicts with observed symptoms and removed from further consideration if a conflict exists. In embodiments, one or more questions may be generated based on the remaining selected candidate systems to aid in collecting information about the patient. In embodiments, the process may be repeated with the updated observed symptoms.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: December 7, 2021
    Assignee: Baidu USA LLC
    Inventors: Erheng Zhong, Chaochun Liu, Yusheng Xie, Nan Du, Hongliang Fei, Yi Zhen, Yu Cao, Richard Chun Ching Wang, Dawen Zhou, Wei Fan
  • Publication number: 20200311519
    Abstract: Described herein are embodiments for systems and methods to incorporate skip-gram convolution to extract non-consecutive local n-gram patterns for comprehensive information for varying text expressions. In one or more embodiments, one or more recurrent neural networks are employed to extract long-range features from localized level to sequential and global level via a chain-like architecture. Comprehensive experiments on large-scale datasets widely used for the text classification task were conducted to demonstrate the effectiveness of the presented deep skip-gram network embodiments. Performance evaluation on various datasets demonstrates that embodiments of the skip-gram network are powerful for general text classification task set. The skip-gram models are robust and may be generalized well on different datasets, even without tuning the hyper-parameters for specific dataset.
    Type: Application
    Filed: March 28, 2019
    Publication date: October 1, 2020
    Applicant: Baidu USA LLC
    Inventors: Hongliang FEI, Chaochun LIU, Yaliang LI, Ping LI
  • Patent number: 10650305
    Abstract: Presented are relation inference methods and systems that use deep learning techniques for data mining documents to discover a relation between terms of interest in a given field covering a specific topic. For example, in the healthcare domain, various embodiments of the present disclosure provide for a relation inference system that mines large-scale medical documents in a free-text database to extract symptom and disease terms and generates relation information that aids in disease diagnosis. In embodiments, this is accomplished by training and using an RNN, such as an LSTM, a Gated Recurrent Unit (GRU), etc., that takes advantage of a term dictionary to examine co-occurrences of terms of interest within documents to discover correlations between the terms. The correlation may then be used to predict statistically most probable terms (e.g., a disease) related to a given search term (e.g., a symptom).
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: May 12, 2020
    Assignee: Baidu USA LLC
    Inventors: Chaochun Liu, Nan Du, Shulong Tan, Hongliang Fei, Wei Fan
  • Patent number: 10496748
    Abstract: A method and apparatus for outputting information are provided. A specific embodiment of the method comprises: retrieving at least one medical entity keyword and at least one attribute keyword from a target medical text; then generating a set of keyword pairs, each of the keyword pairs including the retrieved medical entity keyword and the retrieved attribute keyword; then retrieving, for each of the keyword pairs in the set of keyword pairs, a text characteristic of the each of the keyword pairs in the target medical text, and introducing the retrieved text characteristic into a pre-trained association-relationship determination model to obtain an association result corresponding to the each of the keyword pairs; and finally outputting the keyword pairs having the association relationship in the set of keyword pairs. The embodiment improves the abundance of outputted information contents.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: December 3, 2019
    Assignee: Baidu Online Network Technology (Beijing) Co., Ltd.
    Inventors: Jingbo Zhou, Yuan Xia, Hongliang Fei, Chaochun Liu, Weishan Dong, Wei Fan
  • Patent number: 10372743
    Abstract: Systems and methods are disclosed to identify entities that have a similar meaning, and may, in embodiments, be grouped into entity groups for knowledge base construction. In embodiments, the entity relations of similarity or non-similarity for an entity pair are predicted as a binary relationship. In embodiments, the prediction may be based upon similarity score between the entities and the entity features, which features are constructed using an entity feature or representation model. In embodiments, the prediction may be an iterative process involving minimum human checking and existing knowledge update. In embodiments, one or more entity groups are formed using graph search from the predicted entity pairs. In embodiments, a group centroid entity may be selected to represent each group based on one or more factors, such as its generality or popularity.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: August 6, 2019
    Assignee: Baidu USA LLC
    Inventors: Shulong Tan, Hongliang Fei, Yi Zhen, Yu Cao, Bocong Liu, Chaochun Liu, Richard Chun Ching Wang, Dawen Zhou, Wei Fan
  • Publication number: 20190114318
    Abstract: A method and apparatus for outputting information are provided. A specific embodiment of the method comprises: retrieving at least one medical entity keyword and at least one attribute keyword from a target medical text; then generating a set of keyword pairs, each of the keyword pairs including the retrieved medical entity keyword and the retrieved attribute keyword; then retrieving, for each of the keyword pairs in the set of keyword pairs, a text characteristic of the each of the keyword pairs in the target medical text, and introducing the retrieved text characteristic into a pre-trained association-relationship determination model to obtain an association result corresponding to the each of the keyword pairs; and finally outputting the keyword pairs having the association relationship in the set of keyword pairs. The embodiment improves the abundance of outputted information contents.
    Type: Application
    Filed: September 18, 2018
    Publication date: April 18, 2019
    Applicant: Baidu Online Network Technology (Beijing) Co., Ltd.
    Inventors: Jingbo Zhou, Yuan Xia, Hongliang Fei, Chaochun Liu, Weishan Dong, Wei Fan
  • Publication number: 20180025121
    Abstract: Systems and methods are disclosed provide improved automated extraction of medical-related information. In embodiments, finer-grained medical-related data, such as medical entities, including symptoms, diseases, dimensions, and temporal information, can be extracted. In embodiments, by extracted finer level medical-related information from an input statement and generating visual displays of that information, a medical professional can readily see relevant medical information that provides medical entities and associated dimension information, as well as evolving history.
    Type: Application
    Filed: July 20, 2016
    Publication date: January 25, 2018
    Applicant: Baidu USA LLC
    Inventors: Hongliang Fei, Shulong Tan, Yi Zhen, Erheng Zhong, Chaochun Liu, Dawen Zhou, Wei Fan
  • Publication number: 20180025008
    Abstract: Systems and methods are disclosed to identify entities that have a similar meaning, and may, in embodiments, be grouped into entity groups for knowledge base construction. In embodiments, the entity relations of similarity or non-similarity for an entity pair are predicted as a binary relationship. In embodiments, the prediction may be based upon similarity score between the entities and the entity features, which features are constructed using an entity feature or representation model. In embodiments, the prediction may be an iterative process involving minimum human checking and existing knowledge update. In embodiments, one or more entity groups are formed using graph search from the predicted entity pairs. In embodiments, a group centroid entity may be selected to represent each group based on one or more factors, such as its generality or popularity.
    Type: Application
    Filed: July 20, 2016
    Publication date: January 25, 2018
    Applicant: Baidu USA LLC
    Inventors: Shulong Tan, Hongliang Fei, Yi Zhen, Yu Cao, Bocong Liu, Chaochun Liu, Richard Chun Ching Wang, Dawen Zhou, Wei Fan
  • Publication number: 20180011979
    Abstract: Systems and methods are disclosed for question generation to obtain more related medical information based on observed symptoms from a patient. In embodiments, possible diseases associated with the observed symptoms are generated by querying a knowledge graph. In embodiments, candidate symptoms associated with the possible diseases are also identified and are combined with the observed symptoms to obtain combined symptom sets. In embodiments, discriminative scores for the candidate symptom sets are determined and candidate symptoms with top discriminative scores are selected. In embodiments, these selected candidate symptoms may be checked for conflicts with observed symptoms and removed from further consideration if a conflict exists. In embodiments, one or more questions may be generated based on the remaining selected candidate systems to aid in collecting information about the patient. In embodiments, the process may be repeated with the updated observed symptoms.
    Type: Application
    Filed: July 11, 2016
    Publication date: January 11, 2018
    Applicant: Baidu USA LLC
    Inventors: Erheng Zhong, Chaochun Liu, Yusheng Xie, Nan Du, Hongliang Fei, Yi Zhen, Yu Cao, Richard Chun Ching Wang, Dawen Zhou, Wei Fan
  • Publication number: 20180012121
    Abstract: Presented are relation inference methods and systems that use deep learning techniques for data mining documents to discover a relation between terms of interest in a given field covering a specific topic. For example, in the healthcare domain, various embodiments of the present disclosure provide for a relation inference system that mines large-scale medical documents in a free-text database to extract symptom and disease terms and generates relation information that aids in disease diagnosis. In embodiments, this is accomplished by training and using an RNN, such as an LSTM, a Gated Recurrent Unit (GRU), etc., that takes advantage of a term dictionary to examine co-occurrences of terms of interest within documents to discover correlations between the terms. The correlation may then be used to predict statistically most probable terms (e.g., a disease) related to a given search term (e.g., a symptom).
    Type: Application
    Filed: July 8, 2016
    Publication date: January 11, 2018
    Applicant: Baidu USA LLC
    Inventors: Chaochun Liu, Nan Du, Shulong Tan, Hongliang Fei, Wei Fan