Patents by Inventor Zhiqiang Gao

Zhiqiang Gao 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).

  • Publication number: 20120283850
    Abstract: Multiple designs, systems, methods and processes for controlling a system or plant using an extended active disturbance rejection control (ADRC) based controller are presented. The extended ADRC controller accepts sensor information from the plant. The sensor information is used in conjunction with an extended state observer in combination with a predictor that estimates and predicts the current state of the plant and a co-joined estimate of the system disturbances and system dynamics. The extended state observer estimates and predictions are used in conjunction with a control law that generates an input to the system based in part on the extended state observer estimates and predictions as well as a desired trajectory for the plant to follow.
    Type: Application
    Filed: May 4, 2012
    Publication date: November 8, 2012
    Applicant: Cleveland State University
    Inventors: Zhiqiang Gao, Gang Tian
  • Publication number: 20120122715
    Abstract: The present invention is direct to a sensor for detecting a nucleic acid molecule comprising an electrode arrangement with two electrodes and nucleic acid probes immobilized at the surface of the electrodes. The present invention also refers to a kit and a method of using the sensor or a sensor array. The present invention is further directed to a process of manufacturing a sensor and sensor array.
    Type: Application
    Filed: March 11, 2010
    Publication date: May 17, 2012
    Inventors: Zhiqiang Gao, Somenath Roy, Xiaojun Chen
  • Patent number: 8180464
    Abstract: Multiple designs, systems, methods and processes for controlling a system or plant using an extended active disturbance rejection control (ADRC) based controller are presented. The extended ADRC controller accepts sensor information from the plant. The sensor information is used in conjunction with an extended state observer in combination with a predictor that estimates and predicts the current state of the plant and a co-joined estimate of the system disturbances and system dynamics. The extended state observer estimates and predictions are used in conjunction with a control law that generates an input to the system based in part on the extended state observer estimates and predictions as well as a desired trajectory for the plant to follow.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: May 15, 2012
    Assignee: Cleveland State University
    Inventors: Zhiqiang Gao, Gang Tian
  • Publication number: 20120035747
    Abstract: Controller scaling and parameterization are described. Techniques that can be improved by employing the scaling and parameterization include, but are not limited to, controller design, tuning and optimization. The scaling and parameterization methods described here apply to transfer function based controllers, including PID controllers. The parameterization methods also applies to state feedback and state observer based controllers, as well as linear active disturbance rejection controllers. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the application. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).
    Type: Application
    Filed: August 18, 2011
    Publication date: February 9, 2012
    Applicant: CLEVELAND STATE UNIVERSITY
    Inventor: Zhiqiang Gao
  • Patent number: 8091132
    Abstract: Embodiments are directed toward a method for Behavior-based Traffic Differentiation (BTD) that initially receives incoming packets and performs traffic classification to determine the protocol of the incoming packets. In addition, BTD performs bandwidth division/allocation to further support traffic classification amongst non-TCP traffic such as UDP and ICMP. For TCP traffic, the method for BTD determines whether a TCP connection has been established and performs at least one of rate limiting, waiting time reduction for half-open connections, and incrementing backlog queue size when the TCP connection has not been established. If the TCP connection has been established successfully, the method for BTD further includes proactive tests for traffic differentiation which identify normal traffic, which is admitted, and attack traffic, which is dropped.
    Type: Grant
    Filed: March 5, 2007
    Date of Patent: January 3, 2012
    Assignee: New Jersey Institute of Technology
    Inventors: Nirwan Ansari, Zhiqiang Gao
  • Patent number: 8060340
    Abstract: Controller scaling and parameterization are described. Techniques that can be improved by employing the scaling and parameterization include, but are not limited to, controller design, tuning and optimization. The scaling and parameterization methods described here apply to transfer function based controllers, including PID controllers. The parameterization methods also apply to state feedback and state observer based controllers, as well as linear active disturbance rejection (ADRC) controllers. Parameterization simplifies the use of ADRC. A discrete extended state observer (DESO) and a generalized extended state observer (GESO) are described. They improve the performance of the ESO and therefore ADRC. A tracking control algorithm is also described that improves the performance of the ADRC controller. A general algorithm is described for applying ADRC to multi-input multi-output systems. Several specific applications of the control systems and processes are disclosed.
    Type: Grant
    Filed: September 18, 2006
    Date of Patent: November 15, 2011
    Assignee: Cleveland State University
    Inventors: Zhiqiang Gao, Robert Miklosovic, Aaron Radke, Wankun Zhou, Qing Zheng
  • Patent number: 8041436
    Abstract: Controller scaling and parameterization are described. Techniques that can be improved by employing the scaling and parameterization include, but are not limited to, controller design, tuning and optimization. The scaling and parameterization methods described here apply to transfer function based controllers, including PID controllers. The parameterization methods also applies to state feedback and state observer based controllers, as well as linear active disturbance rejection controllers.
    Type: Grant
    Filed: January 27, 2003
    Date of Patent: October 18, 2011
    Assignee: Cleveland State University
    Inventor: Zhiqiang Gao
  • Patent number: 8028199
    Abstract: A method, device and computer product suitable for determining the source of failing to achieve a desired level of service quality in communication between at least two components in a distributed system is disclosed. The method comprises the steps of developing a model of the distributed system, the model including at least configuration non-specific representations of types of managed components, and representations of relationships among the managed components, determining associated managed components within each route of data communication between the at least two components, augmenting the representation of the associated managed components with information associated with each of the routes of data communication, monitoring at least one performance criterion of the communication between the at least two components and determining a source of degradation when the performance criteria is indicated to be outside acceptable limits.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: September 27, 2011
    Assignee: EMC Corporation
    Inventors: Vankata Guruprasad, Zhiqiang Gao
  • Publication number: 20110189705
    Abstract: The invention provides a highly sensitive immunoassay for detection of a biological species. The immunoassay comprises exposing an electrode to an analyte liquid putatively containing the biological species so as to couple the biological species, if present in the analyte liquid, to a binding antibody on the electrode. The electrode comprises a binding antibody and an anchor group, each being coupled to an electrically conductive substrate, said binding antibody being capable of binding to the biological species and said anchor group being capable of binding to a redox polymer.
    Type: Application
    Filed: June 6, 2008
    Publication date: August 4, 2011
    Inventors: Zhiqiang Gao, Jie Zhang
  • Patent number: 7902362
    Abstract: The invention is directed to a compound having the general formula (1): wherein each of La and Lb is an independently selected from a linking moiety comprising 0 to 10 main chain atoms, optionally substituted; each of Za and Zb is an independently selected complexing moiety comprising at least one nitrogen atom; either both or one of Za and/or Zb is coordinatively bonded to a respective transition metal complex Ma Va and Mb Vb through said nitrogen atom, wherein each of Ma and Mb is an independently selected transition metal, and each of Va and Vb is an independently selected valence group.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: March 8, 2011
    Assignee: Agency for Science, Technology & Research
    Inventors: Zhiqiang Gao, Fang Xie
  • Patent number: 7807835
    Abstract: Compositions and methods for electrochemical detection of an analyte comprising a transition metal compound wherein M is a metallic element that can form a coordinate bond to nitrogen; R and R? are coordinated to M at their nitrogen atoms; L is a linking ligand; Z is chlorine or bromine; m can be from 1 to 6 and X is an anion, or combination of anions, that balances the charge m. Also provided are electrochemical tags and methods of detection.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: October 5, 2010
    Assignee: Agency for Science, Technology and Research
    Inventors: Hong Xie, Zhiqiang Gao
  • Publication number: 20100194409
    Abstract: The invention provides a method of electrically detecting a biological analyte molecule by means of a pair of electrodes. The electrodes are arranged at a distance from one another within a sensing zone. A capture molecule, which has an affinity to the analyte molecule and which is capable of forming a complex with the analyte molecule, is immobilised on an immobilisation unit. The immobilisation unit is contacted with a solution suspected to comprise the analyte molecule. The analyte molecule is allowed to form a complex with the capture molecule. The invention also provides a probe defined by a nanoparticulate tag that comprises or consists of electrically conducting matter that is capable of chemically interacting with the analyte molecule. In the method of the invention the electrically conducting nanoparticulate tag is added. Thereby the electrically conducting nanoparticulate tag is allowed to associate to the complex formed between the capture molecule and the analyte molecule.
    Type: Application
    Filed: August 14, 2007
    Publication date: August 5, 2010
    Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventors: Zhiqiang Gao, Yi Fan, Xiantong Chen, Jinming Kong
  • Publication number: 20100133117
    Abstract: The invention provides methods and kits for the electrochemical detection and/or quantification of a target nucleic acid molecule by means of a detection electrode. In one method there is immobilized on the detection electrode a peptide nucleic acid (PNA) capture molecule, which has a nucleotide sequence that is at least partially complementary to at least a portion of the target nucleic acid molecule. The electrode is contacted with a solution expected to include the target nucleic acid molecule and the target nucleic acid molecule allowed to hybridize to the PNA, thereby allowing the formation of a complex between the PNA capture molecule and the target nucleic acid molecule. A polymerisable positively chargeable precursor is added, which associates to the complex formed between the PNA capture molecule and the target nucleic acid molecule.
    Type: Application
    Filed: August 8, 2006
    Publication date: June 3, 2010
    Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventor: Zhiqiang Gao
  • Publication number: 20100059391
    Abstract: Biomolecule-specific probe is immobilized on an electrode surface to form a modified electrode. The modified electrode is exposed to target biomolecule. The biomolecule is captured by the probe whereby a first complex with the biomolecule is formed. Subsequently, the biomolecule is exposed to electroactive label having binding affinity to the biomolecule. The biomolecule adsorbs the electroactive label to the modified electrode to form a working electrode whereby a second complex comprising the first complex with the biomolecule and the bound electroactive label is formed. The working electrode is placed in an electrolyte medium and electrochemical measurement between the working electrode and a reference electrode is taken wherein the electrochemical measurement comprises the measurement of electrical signal resulting from a solid-state electrochemical process involving the electroactive labels.
    Type: Application
    Filed: August 13, 2009
    Publication date: March 11, 2010
    Applicant: Agency for Science, Technology and Research
    Inventors: Jackie Y. Ying, Jie Zhang, Zhiqiang Gao, Boon Ping Ting
  • Patent number: 7655404
    Abstract: A method for the detection and/or quantification of at least one target nucleic acid or target polypeptide in a sample of nucleic acids or polypeptides comprising the steps of: a) providing a sample comprising nucleic acids or polypeptides; b) labeling the nucleic acids or polypeptides with a ligand conjugate, the ligand conjugate comprising a first element binding to the nucleic acids or polypeptides and a second element which is a capture ligand; c) contacting the nucleic acid-ligand conjugates or polypeptide-ligand conjugates with at least one capture probe, the capture probe hybridizing with or binding to at least one target nucleic acid or target polypeptide; d) adding i) an oxidoreductase enzyme, wherein the oxidoreductase enzyme is recognized by the capture ligand, or ii) a complex comprising an oxidoreductase enzyme bound to a capture receptor, the capture receptor capable of binding to the capture ligand; e) adding a redox polymer, the redox polymer binding to the oxidoreductase enzyme, thereby resul
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: February 2, 2010
    Assignee: Agency for Science, Technology and Research
    Inventors: Zhiqiang Gao, Hong Xie, Yuan Hong Yu
  • Publication number: 20090325305
    Abstract: A threading intercalator of general formula I: IG1-DG-IG2-(DG-IG3)n??(I) wherein IG1, IG2, and IG3 are the same or different and represent an intercalating group comprising a planar polyaromatic group; wherein DG represents an electrochemical, a chemiluminescent, a catalytic or an electrochemiluminescent detectable group; and wherein n represents 0 or 1. This invention also relates to a process of detecting a double strand nucleic acid molecule using the threading intercalator.
    Type: Application
    Filed: July 10, 2009
    Publication date: December 31, 2009
    Inventors: Zhiqiang Gao, Hong Xie, Fang Xie
  • Publication number: 20090305247
    Abstract: There is provided an electroactive nanoparticle, which may be used as a label in electrochemical detection assays. The nanoparticle comprises a transition metal oxide and a capping agent, the capping agent comprising a ligand group and a functional group. The capping agent is coordinated to a transition metal centre in the transition metal oxide via the ligand group. Also provided are methods relating to preparation of the nanoparticle and detection of an analyte molecule in a sample using electrochemical methods.
    Type: Application
    Filed: November 30, 2006
    Publication date: December 10, 2009
    Inventor: Zhiqiang Gao
  • Publication number: 20090233289
    Abstract: The invention is directed to a compound having the general formula (1): wherein each of La and Lb is an independently selected from a linking moiety comprising 0 to 10 main chain atoms, optionally substituted; each of Za and Zb is an independently selected complexing moiety comprising at least one nitrogen atom; either both or one of Za and/or Zb is coordinatively bonded to a respective transition metal complex Ma Va and Mb Vb through said nitrogen atom, wherein each of Ma and Mb is an independently selected transition metal, and each of Va and Vb is an independently selected valence group.
    Type: Application
    Filed: December 22, 2008
    Publication date: September 17, 2009
    Applicant: Agency for Science, Technology and Research
    Inventors: Zhiqiang Gao, Fang Xie
  • Publication number: 20090218236
    Abstract: Compositions and methods for electrochemical detection of an analyte comprising a transition metal compound wherein M is a metallic element that can form a coordinate bond to nitrogen; R and R? are coordinated to M at their nitrogen atoms; L is a linking ligand; Z is chlorine or bromine; m can be from 1 to 6 and X is an anion, or combination of anions, that balances the charge m. Also provided are electrochemical tags and methods of detection.
    Type: Application
    Filed: March 27, 2009
    Publication date: September 3, 2009
    Applicant: Agency for Science, Technology and Research
    Inventors: Hong Xie, Zhiqiang Gao
  • Patent number: 7576205
    Abstract: A threading intercalator of general formula I: IG1-DG-IG2-(DG-IG3)n??(I) wherein IG1, IG2, and IG3 are the same or different and represent an intercalating group comprising a planar polyaromatic group; wherein DG represents an electrochemical, a chemiluminescent, a catalytic or an electrochemiluminescent detectable group; and wherein n represents 0 or 1. This invention also relates to a process of detecting a double strand nucleic acid molecule using the threading intercalator.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: August 18, 2009
    Assignee: Agency for Science, Technology & Research
    Inventors: Zhiqiang Gao, Hong Xie, Fang Xie