Patents by Inventor Tao Tao

Tao Tao 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: 8288585
    Abstract: Disclosed are procatalyst compositions having an internal electron donor which include a substituted phenylene aromatic diester and optionally an electron donor component. Ziegler-Natta catalyst compositions containing the present procatalyst compositions exhibit high activity and produce propylene-based olefins with broad molecular weight distribution.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: October 16, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Linfeng Chen, Tak W. Leung, Tao Tao
  • Patent number: 8288304
    Abstract: Disclosed are procatalyst compositions having an internal electron donor which includes an adamantane dicarboxylate and optionally an additional electron donor component. Ziegler-Natta catalyst compositions containing the present procatalyst compositions to produce propylene-based olefins with broad molecular weight distribution.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: October 16, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Linfeng Chen, Tak W. Leung, Tao Tao, Kuanqiang Gao
  • Patent number: 8263520
    Abstract: A solid, hydrocarbon-insoluble, catalyst component useful in polymerizing olefins, said catalyst component containing magnesium, titanium, and halogen, and further containing an internal electron donor having a structure: [R1—O—C(O)—O—]xR2 wherein R1 is independently at each occurrence, an aliphatic or aromatic hydrocarbon, or substituted hydrocarbon group containing from 1 to 20 carbon atoms; x is 2-4; and R2 is an aliphatic or aromatic hydrocarbon, or substituted hydrocarbon group containing from 1 to 20 carbon atoms, provided that there are 2 atoms in the shortest chain connecting a first R1—O—C(O)—O— group and a second R1—O—C(O)—O— group.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: September 11, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Joseph N. Coalter, III, Tak W. Leung, Tao Tao, Kuanqiang Gao
  • Patent number: 8247341
    Abstract: Disclosed are procatalyst compositions having an internal electron donor which includes a silyl glutarate and optionally an electron donor component. Ziegler-Natta catalyst compositions containing the present procatalyst compositions exhibit strong activity and produce propylene-based olefins with high isotacticity.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: August 21, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Kelly A. Gonzalez, Tao Tao, Tak W. Leung
  • Publication number: 20120173949
    Abstract: The embodiments of the present invention provide a method of constructing parity-check matrix of LDPC code. The method comprises the following steps of: constructing a MB×NB base matrix B for an LDPC code with code rate R and code length N, wherein MB=M/K, NB=N/K, M=N (1?R), K is the expansion factor of the base matrix, K??, and ? is the set of the common factors of M and N; and replacing the elements of the base matrix B with a K×K matrix, and expanding the base matrix B into a parity-check matrix H with size of M×N for the encoding or decoding of the LDPC code. An encoding method and apparatus of LDPC code are also provided by the embodiments of the present invention. The technical solutions provided by the embodiments of the present invention can construct LDPC codes with good performance, solve the storage problem of the parity-check matrix, and effectively reduce the implementation complexity of the encoding apparatus.
    Type: Application
    Filed: August 11, 2010
    Publication date: July 5, 2012
    Applicant: TIMI TECHNOLOGIES CO., LTD.
    Inventors: Binbin Liu, Dong Bai, Qihong Ge, Tao Tao, Junwei Wang, Wen Chen
  • Publication number: 20120157645
    Abstract: Disclosed herein are catalyst compositions and polymers, i.e., propylene-based polymers, produced therefrom. The present catalyst compositions include an internal electron donor with an alkoxypropyl ester. The present catalyst compositions improve catalyst selectivity. Propylene-based polymer produced from the present catalyst composition has a melt flow rate greater than 4 g/10 min.
    Type: Application
    Filed: December 21, 2010
    Publication date: June 21, 2012
    Inventors: Linfeng Chen, Tak W. Leung, Tao Tao
  • Publication number: 20120157643
    Abstract: Disclosed herein are catalyst compositions and polymers, i.e., propylene-based polymers, produced therefrom. The present catalyst compositions contain an internal electron donor of an alkoxyalkyl 2-propenoate and optionally a mixed external electron donor. The present catalyst compositions improve catalyst selectivity and polymer stiffness. Polypropylene homopolymer produced from the present catalyst composition has a xylene solubles content less than 4 wt % and a TMF greater than 172.0° C.
    Type: Application
    Filed: December 21, 2010
    Publication date: June 21, 2012
    Inventors: Linfeng Chen, Tak W. Leung, Tao Tao
  • Publication number: 20120157295
    Abstract: Disclosed herein are processes for preparing procatalyst compositions with an internal electron donor containing greater than 4.5 wt % of a compounded alkoxyalkyl ester. Also disclosed are catalyst compositions containing the procatalyst composition and polymers, i.e., propylene-based polymers, produced therefrom. The present procatalyst compositions improve catalyst selectivity, catalyst activity, procatalyst morphology and polymer particle morphology, and improve hydrogen response during olefin polymerization.
    Type: Application
    Filed: December 21, 2010
    Publication date: June 21, 2012
    Inventors: Linfeng Chen, Tak W. Leung, Kelly Gonzalez, Tao Tao
  • Publication number: 20120157296
    Abstract: Disclosed herein are procatalyst compositions, catalyst compositions and polymers, i.e., propylene-based polymers, produced therefrom. The present procatalyst compositions contain a halo-malonate and a 2-fluoro-malonate in particular. The present catalyst compositions improve catalyst selectivity, improve catalyst activity, and also improve hydrogen response during polymerization. Propylene-based polymer produced from the present catalyst composition has a melt flow rate greater than 50 g/10 min.
    Type: Application
    Filed: December 21, 2010
    Publication date: June 21, 2012
    Inventors: Linfeng Chen, Tak W. Leung, Tao Tao
  • Patent number: 8139622
    Abstract: A system and method for generating and detecting identifier sequence of a bandwidth-limited transmitter are disclosed, comprising an identifier sequence generating portion and a detection portion. The identifier sequence generating portion comprises: generating a frequency-domain random sequence; generating a frequency-domain orthogonal sequence; performing frequency-domain truncation; performing frequency-time transformation; and performing cycle extension.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: March 20, 2012
    Assignee: TIMI Technologies Co., Ltd.
    Inventors: Junwei Wang, Qihong Ge, Tao Tao, Dong Bai, Wen Chen, Qinghua Yang, Qun Li
  • Patent number: 8088872
    Abstract: The present disclosure provides silyl esters and silyl diol esters suitable as internal electron donors in procatalysts for polymer production. Disclosed are procatalyst compositions formed from a procatalyst precursor and an internal electron donor that is a silyl ester or a silyl diol ester. The procatalyst compositions can be used with a cocatalyst and optionally an external electron donor and/or an activity limiting agent to form a Ziegler-Nana catalyst composition. The present catalyst compositions exhibit high catalyst activity and form olefin-based polymers with broad molecular weight distribution, favorable flexural modulus, and high isotacticity.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: January 3, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Linfeng Chen, Tak W. Leung, Tao Tao
  • Patent number: 8086596
    Abstract: Checking health of information technology infrastructure based on log data, in one aspect, may collect log data non-intrusively from a production system, said log data at least associated with transactions occurring in the production system and resource utilization of the production system, may normalize said log data into a plurality of log data types, may perform data regression analysis using said plurality of log data types to estimate resources consumed by each of said transactions and throughput of each of said transactions, and may use a queuing model to predict performance of the information technology infrastructure under various workloads.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: December 27, 2011
    Assignee: International Business Machines Corporation
    Inventors: Fausto Bernardini, Rong N. Chang, Chang-Shing Perng, Edward C. So, Chunqiang Tang, Tao Tao, Chun Zhang
  • Publication number: 20110299381
    Abstract: A mobile multimedia broadcast transmission system is provided, which comprises: a Reed-Solomon (RS) coding and byte interleaving unit, a Low Density Parity Check (LDPC) coder, a bit interleaver, a constellation mapping unit, a frequency domain symbol generator, a scrambler, an Inverse Fast Fourier Transform (IFFT) unit, a time domain framing unit, and a transmitter. According to the technical solutions provided in the present invention, the system can provide high-quality mobile multimedia services for users in a 6 MHz operation bandwidth. Furthermore, an optimized selection is performed on RS coding according to the operation bandwidth of the system, thereby selecting an appropriate coding mode according to different channel conditions. Accordingly, the byte interleaver is optimized, such that suitable interleaving parameters can be used to perform byte interleaving.
    Type: Application
    Filed: February 1, 2010
    Publication date: December 8, 2011
    Applicant: Timi Technologies Co., Ltd.,
    Inventors: Qihong Ge, Dong Bai, Tao Tao, Qiusheng Wang, Wen Chen
  • Publication number: 20110282816
    Abstract: A spam detection system is disclosed. The system includes a classifier training component that receives a first set of training pages labeled as normal pages and a second set of training pages labeled as spam pages. The training component trains a web page classifier based on both the first set of training pages and the second set of training pages. A spam detector then receives unlabeled web pages uses the web page classifier to classify the unlabeled web pages as spam pages or normal pages.
    Type: Application
    Filed: April 1, 2011
    Publication date: November 17, 2011
    Applicant: MICROSOFT CORPORATION
    Inventors: Dengyong Zhou, Christopher J.C. Burges, Tao Tao
  • Publication number: 20110268206
    Abstract: The present invention relates to the field of communication technology. A channel estimation device for an Orthogonal Frequency Division Multiplexing (OFDM) system is provided for performing channel estimation on data based on synchronization signal and pilot, which comprises: a synchronization signal based initial channel estimation module for performing initial channel estimation based on a synchronization signal in the data; a pilot channel tracking module for performing pilot channel tracking on the result of the initial channel estimation; a noise reduction module for performing noise reduction on the result of the pilot channel tracking; and an effective sub-carrier extraction module for extracting channel estimation values of effective sub-carriers from the result of the noise reduction.
    Type: Application
    Filed: December 30, 2009
    Publication date: November 3, 2011
    Applicant: Timi Technologies Co., Ltd.
    Inventors: Qihong Ge, Junwei Wang, Binbin Liu, Dong Bai, Tao Tao
  • Publication number: 20110239077
    Abstract: The present invention relates to a method for constructing LPDC code check matrix and encoding and decoding devices using the same. The encoding device encodes the inputted binary information and outputs the encoded system code sequence of position transformation. The encoding device comprises: a matrix multiplication module outputting a check sequence p which is obtained through the binary information sequence m multiplied with a matrix; a sorting index module having N memory units storing index values of a sorting table IDX in turn; and a sorting output module for sorting the m and p and outputting a code word c based on the index value stored in the sorting index table. The present invention constructs the LDPC code check matrix using an algebraic structure, obtaining the LDPC code with stable performance. In addition, the encoding and decoding devices of the present invention occupy less memory, which is preferable for optimization of the devices.
    Type: Application
    Filed: November 16, 2006
    Publication date: September 29, 2011
    Inventors: Dong Bai, Binbin Liu, Tao Tao, Qihong Ge, Wen Chen, Huishi Song, Qun Li, Hongbing Shen, Qinghua Yang
  • Patent number: 7978593
    Abstract: A method for transmitting control information to indicate a receiver, comprising following steps: the control information is formed at transmitting side and is encoded based on the working status of the transmitting side of the system; after the encoded control information is mapped, it is multiplexed with other pilot symbol and service load, then an OFDM symbol is generated; the OFDM symbol is transformed from frequency domain to time domain, then a time domain sampling signal is obtained and transmitted to the receiving side of the system; at the receiving side, the time domain sampling signal transmitted by the transmitting side is received and transformed from time domain to frequency domain to form OFDM symbol; the control information is obtained from the valid sub carrier of the OFDM symbol, and the control information is decoded; each work information is extracted form the decoded control information, and the receiving terminal is indicated to execute respective receive process based on the extracted w
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: July 12, 2011
    Assignee: Timi Technologies Co., Ltd.
    Inventors: Fajun Yan, Tao Tao, Wen Chen, Qihong Ge, Dong Bai, Qinghua Yang
  • Patent number: 7975301
    Abstract: A SPAM detection system is provided. The system includes a graph clustering component to analyze web data. A link analysis component can be associated with the graph clustering component to facilitate SPAM detection in accordance with the web data.
    Type: Grant
    Filed: September 30, 2007
    Date of Patent: July 5, 2011
    Assignee: Microsoft Corporation
    Inventors: Jennifer T. Chayes, Christian H. Borgs, Krishna Chaitanya Gade, John E. Hopcroft, Seyed Vahab Mirrokni, Amit Prakash, Tao Tao
  • Publication number: 20110161260
    Abstract: Techniques for index building are described. Clickcounts of respective training URLs may indicate a number of times that corresponding training URLs were clicked in search engine results. A machine learning algorithm implemented on a computer computes a trained model that is then stored. The clickcounts and respective URLs are passed to the machine learning algorithm to train the model to predict probabilities based on feature vectors of URLs. An index of web pages is built for a set of URLs that identify the web pages. Feature vectors for the URLs are computed. Probabilities of the web pages of the URLs being searched in the future by users may be computed by processing the feature vectors with the trained model. The probabilities may be used to determine which of the URLs to include in the index.
    Type: Application
    Filed: December 30, 2009
    Publication date: June 30, 2011
    Inventors: Chris J. Burges, Denyong Zhou, Xiao Li, Yan Ke, Tao Tao, Xiaodong Fan
  • Publication number: 20110130530
    Abstract: A solid, hydrocarbon-insoluble, catalyst component useful in polymerizing olefins, said catalyst component containing magnesium, titanium, and halogen, and further containing an internal electron donor having a structure: [R1—O—C(O)—O—]xR2 wherein R1 is independently at each occurrence, an aliphatic or aromatic hydrocarbon, or substituted hydrocarbon group containing from 1 to 20 carbon atoms; x is 2-4; and R2 is an aliphatic or aromatic hydrocarbon, or substituted hydrocarbon group containing from 1 to 20 carbon atoms, provided that there are 2 atoms in the shortest chain connecting a first R1—O—C(O)—O— group and a second R1—O—C(O)—O— group.
    Type: Application
    Filed: November 30, 2010
    Publication date: June 2, 2011
    Applicant: Dow Global Technologies Inc.
    Inventors: Joseph N. Coalter, III, Tak W. Leung, Tao Tao, Kuanqiang Gao