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Zhixiu X Han

from Acton, MA
Age ~59
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Also known as:
Zhi Xiu Han, Zhi X Han, Zhi-Xiu Han, Han Zhixiu, Han Zhi-Xiu
Phone and address:
135 Butternut Holw, Acton, MA 01718
(978) 263-9088
Connected to:
Ahrum Han, 38Aileen Y Han, 60Alexander S Han, 61Aron S Han, 37Arthur Han, 61Autumn W Han, 36Bao Han, 60Bianca S Han, 31Bokyung K Han, 56Bora P Han, 45

Zhixiu Han Phones & Addresses

  • 135 Butternut Holw, Village of Nagog Woods, MA 01718 (978) 263-9088
  • 120 Parker St, Acton, MA 01720 (978) 263-9088
  • 655 Maxwelton Ct, Lexington, KY 40508 (859) 225-7171

Resumes

Resumes

Zhixiu Han Photo 1

Principal Systems Engineer

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Location:
Acton, MA
Industry:
Biotechnology
Work:
Neurometrix, Inc.
Research Scientist
Zhixiu Han Photo 2

Control Engineer

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Location:
Acton, MA
Industry:
Industrial Automation
Work:
Energen
Control Engineer
Zhixiu Han Photo 3

Research Scientist

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Location:
Acton, MA
Industry:
Medical Devices
Work:
NeuroMetrix, Inc.
Research Scientist
Energen, Inc. 2001 - 2006
Senior Controls Engineer
Education:
University of New South Wales 1995 - 1998
PhD, Electrical Engineering
Zhixiu Han Photo 4

Zhixiu Han

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Publications

Us Patents

Hybrid Terrain-Adaptive Lower-Extremity Systems

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US Patent:
8419804, Apr 16, 2013
Filed:
Sep 1, 2009
Appl. No.:
12/552036
Inventors:
Hugh Miller Herr - Somerville MA, US
Rick Casler - Cambridge MA, US
Zhixiu Han - Acton MA, US
Assignee:
iWalk, Inc. - Bedford MA
International Classification:
A61F 2/62
A61F 2/70
US Classification:
623 24
Abstract:
Hybrid terrain-adaptive lower-extremity apparatus and methods that perform in a variety of different situations by detecting the terrain that is being traversed, and adapting to the detected terrain. In some embodiments, the ability to control the apparatus for each of these situations builds upon five basic capabilities: (1) determining the activity being performed; (2) dynamically controlling the characteristics of the apparatus based on the activity that is being performed; (3) dynamically driving the apparatus based on the activity that is being performed; (4) determining terrain texture irregularities (e. g. , how sticky is the terrain, how slippery is the terrain, is the terrain coarse or smooth, does the terrain have any obstructions, such as rocks) and (5) a mechanical design of the apparatus that can respond to the dynamic control and dynamic drive.

Active Vibration Isolation System

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US Patent:
20030168295, Sep 11, 2003
Filed:
Feb 12, 2003
Appl. No.:
10/365696
Inventors:
Zhixiu Han - Acton MA, US
Anil Mavanur - Worcester MA, US
Chandrashekhar Joshi - Bedford MA, US
International Classification:
F16F009/53
F16M011/00
US Classification:
188/267100, 267/136000
Abstract:
A vibration isolation system, with an actuator having two nested, relatively movable members defining an interior portion, and a magnetostrictive member coupled to both nested members and within the interior portion. A variable-strength magnetic field is applied to the magnetostrictive member, for controlling the elongation of the magnetostrictive member, to thereby control the relative positions of the two nested members.

Motor Unit Number Estimation (Mune) For The Assessment Of Neuromuscular Function

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US Patent:
20080051673, Feb 28, 2008
Filed:
Aug 17, 2007
Appl. No.:
11/893737
Inventors:
Xuan Kong - Acton MA, US
Zhixiu Han - Acton MA, US
Shai Gozani - Brookline MA, US
International Classification:
A61B 5/04
US Classification:
600546000
Abstract:
A method for the assessment of neuromuscular function by motor unit number estimation, comprising: (i) determining and controlling stimulation and data acquisition process via pre-configured electrode array so as to acquire stable and less uncertainty MU responses; (ii) pre-processing acquired MUs responses so as to attenuate noise, determine MUs activity region, and improve processing speed and accuracy; (iii) minimizing alternation effects by globally searching and comparing SMUPs; (iv) eliminating alternation effects by identifying alternating MUs directly; and (v) computing and reporting MUNE results, as well as the statistical description of these MUN estimates to evaluate its robustness.

Estimation Of F-Wave Times Of Arrival (Toa) For Use In The Assessment Of Neuromuscular Function

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US Patent:
20090024051, Jan 22, 2009
Filed:
Mar 3, 2008
Appl. No.:
12/074346
Inventors:
Xuan Kong - Acton MA, US
Zhixiu Han - Acton MA, US
Shai N. Gozani - Brookline MA, US
International Classification:
A61B 5/04
US Classification:
600546
Abstract:
A method and apparatus for the assessment of neuromuscular function by estimating motor unit F-wave component time of arrival (TOA), comprising: (i) determining and comparing F-wave component features so as to accurately identify individual F-wave components; (ii) repeatedly searching the individual F-wave components and extracting additional individual F-wavelets where possible so as to build a complete F-wave TOA profile; and (iii) computing and reporting TOA results for the assessment of neuromuscular function.

Hybrid Terrain-Adaptive Lower-Extremity Systems

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US Patent:
20100114329, May 6, 2010
Filed:
Sep 1, 2009
Appl. No.:
12/552021
Inventors:
Rick Casler - Cambridge MA, US
Hugh Miller Herr - Somerville MA, US
Zhixiu Han - Acton MA, US
Christopher E. Barnhart - Watertown MA, US
Assignee:
iWalk, Inc. - Cambridge MA
International Classification:
A61F 2/48
A61F 2/74
A61H 3/00
US Classification:
623 24, 623 27, 601 34
Abstract:
Hybrid terrain-adaptive lower-extremity apparatus and methods that perform in a variety of different situations by detecting the terrain that is being traversed, and adapting to the detected terrain. In some embodiments, the ability to control the apparatus for each of these situations builds upon five basic capabilities: (1) determining the activity being performed; (2) dynamically controlling the characteristics of the apparatus based on the activity that is being performed; (3) dynamically driving the apparatus based on the activity that is being performed; (4) determining terrain texture irregularities (e.g., how sticky is the terrain, how slippery is the terrain, is the terrain coarse or smooth, does the terrain have any obstructions, such as rocks) and (5) a mechanical design of the apparatus that can respond to the dynamic control and dynamic drive.

Controlling Power In A Prosthesis Or Orthosis Based On Predicted Walking Speed Or Surrogate For Same

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US Patent:
20110295384, Dec 1, 2011
Filed:
Apr 4, 2011
Appl. No.:
13/079564
Inventors:
Hugh M. Herr - Somerville MA, US
Richard J. Casler - Franklin MA, US
Zhixiu Han - Acton MA, US
Chris Barnhart - Watertown MA, US
Gary Girzon - Sudbury MA, US
International Classification:
A61F 2/48
A61F 2/66
US Classification:
623 24, 623 50
Abstract:
In some embodiments of a prosthetic or orthotic ankle/foot, a prediction is made of what the walking speed will be during an upcoming step. When the predicted walking speed is slow, the characteristics of the apparatus are then modified so that less net-work that is performed during that step (as compared to when the predicted walking speed is fast). This may be implemented using one sensor from which the walking speed can be predicted, and a second sensor from which ankle torque can be determined. A controller receives inputs from those sensors, and controls a motor's torque so that the torque for slow walking speeds is lower than the torque for fast walking speeds. This reduces the work performed by the actuator over a gait cycle and the peak actuator power delivered during the gait cycle. In some embodiments, a series elastic element is connected in series with a motor that can drive the ankle, and at least one sensor is provided with an output from which a deflection of the series elastic element can be determined. A controller determines a desired torque based on the output, and controls the motor's torque based on the determined desired torque.

Controlling Torque In A Prosthesis Or Orthosis Based On A Deflection Of Series Elastic Element

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US Patent:
20110295385, Dec 1, 2011
Filed:
Apr 4, 2011
Appl. No.:
13/079571
Inventors:
Hugh M. Herr - Somerville MA, US
Zhixiu Han - Acton MA, US
Chris Barnhart - Watertown MA, US
Gary Girzon - Sudbury MA, US
David Garlow - Lynnfield MA, US
International Classification:
A61F 2/48
A61F 2/66
US Classification:
623 24, 623 55
Abstract:
In some embodiments of a prosthetic or orthotic ankle/foot, a prediction is made of what the walking speed will be during an upcoming step. When the predicted walking speed is slow, the characteristics of the apparatus are then modified so that less net-work that is performed during that step (as compared to when the predicted walking speed is fast). This may be implemented using one sensor from which the walking speed can be predicted, and a second sensor from which ankle torque can be determined. A controller receives inputs from those sensors, and controls a motor's torque so that the torque for slow walking speeds is lower than the torque for fast walking speeds. This reduces the work performed by the actuator over a gait cycle and the peak actuator power delivered during the gait cycle. In some embodiments, a series elastic element is connected in series with a motor that can drive the ankle, and at least one sensor is provided with an output from which a deflection of the series elastic element can be determined. A controller determines a desired torque based on the output, and controls the motor's torque based on the determined desired torque.

Powered Joint Orthosis

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US Patent:
20120259429, Oct 11, 2012
Filed:
Jan 10, 2012
Appl. No.:
13/347443
Inventors:
Zhixiu Han - Acton MA, US
Christopher E. Barnhart - Carlisle MA, US
Hugh M. Herr - Somerville MA, US
Christopher Williams - Pittsburgh PA, US
Jeff A. Weber - San Francisco CA, US
International Classification:
A61F 2/48
US Classification:
623 24
Abstract:
A powered device augments a joint function of a human during a gait cycle using a powered actuator that supplies an augmentation torque, an impedance, or both to a joint, and a controller that modulates the augmentation torque, the impedance, and a joint equilibrium according to a phase of the gait cycle to provide at least a biomimetic response. Accordingly, the device is capable of normalizing or augmenting human biomechanical function, responsive to a wearer's activity, regardless of speed and terrain.
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Zhixiu X Han from Acton, MA, age ~59 Get Report