Patents by Inventor Zhiwei Zhu
Zhiwei Zhu 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).
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Patent number: 10415881Abstract: The present invention discloses a method for freeze-drying drug liposomes powder assisted by a variable-frequency alternating-current electric field, which includes the following steps: (1) preparing a drug-liposome suspension sample; (2) dehydrating the sample under a 1-10 kHz, 3-10 kV high-voltage alternating current; (3) freezing and drying the sample treated in step (2) at ?20° C. to ?40° C., under a 10-25 kHz, 0.2-1 kV high-voltage alternating current, until completion of the freezing process; and (4) heating and drying the sample in a vacuum until completion of sublimation and desorption, and obtaining the drug liposomes freeze-dried powder. The present invention not only greatly shortens a freezing and drying time, but also controls a size of nuclei and ice crystals, further ensuring a quality of the freeze-dried powder.Type: GrantFiled: December 29, 2015Date of Patent: September 17, 2019Assignee: South China University of TechnologyInventors: Dawen Sun, Lina Cheng, Zhiwei Zhu, Xin'an Zeng, Qijun Wang, Zi Zhang
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Publication number: 20190178792Abstract: The invention discloses a method for rapidly predicting freezer storage time of frozen pork based on reflectance ratio of two near-infrared bands. Firstly, the near-infrared spectra information of the frozen pork is obtained by a near-infrared spectrometer, and the near-infrared spectra are analyzed to obtain center values of bands centered on 1500 nm, 1350 nm and 1890 nm characteristic peaks. The ratio thereof is treated as a eigenvector, which is substituted into the characteristic exponential function based on the eigenvector and freezer storage time to calculate the freezer storage time of frozen pork. By near-infrared spectroscopy technology, the invention directly detects the freezer storage time of pork in a frozen state, significantly reduces the time required by the conventional method, and has the advantages of being fast and non-destructive.Type: ApplicationFiled: September 20, 2017Publication date: June 13, 2019Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Dawen SUN, Weiwei CHENG, Hongbin PU, Zhiwei ZHU, Zhong HAN
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Publication number: 20190166860Abstract: Disclosed herein is a multi-temperature-region ice-temperature fresh keeping storehouse and a fresh keeping method for bergamot pears that includes a precooling region, a feeding and discharging channel, a cooling region, an ice temperature detection device, a grading device, a conveyer belt control device, an automatic storage device, and a temperature rise and fall buffering channel. The cooling region includes four freezers, with temperatures ranging from 0° C.-?3° C. The four freezers are connected level by level according to a temperature reduction rule. The present disclosure implements multi-temperature-region graded storage of bergamot pears according to the value of an ice point temperature of the bergamot pears, so that they are always stored close to the ice point temperature without freezing, thereby preventing freeze injury, and prolonging shelf life.Type: ApplicationFiled: November 23, 2017Publication date: June 6, 2019Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Dawen SUN, Tingtiao PAN, Hongbin PU, Zhiwei ZHU, Zhong HAN
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Publication number: 20190040477Abstract: The present invention relates to a method for producing fatty acids, in particular shot/medium-chain fatty acids (S/MCFA), by expression in a host cell of a recombinant fatty acid synthase (FAS) naturally devoid of a thioesterase (TE) domain comprising a heterologous thioesterase (TE). The invention further relates to polynucleotides comprising such recombinant FAS, polypeptides encoded thereby, and vectors comprising such polynucleotides, as well as recombinant host cells comprising the polynucleotides, polypeptides, or vectors.Type: ApplicationFiled: February 20, 2017Publication date: February 7, 2019Inventors: Zhiwei ZHU, Anastasia KRIVORUCHKO, Jens NIELSEN
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Publication number: 20180075774Abstract: A method and system for analyzing at least one food item on a food plate is disclosed. A plurality of images of the food plate is received by an image capturing device. A description of the at least one food item on the food plate is received by a recognition device. The description is at least one of a voice description and a text description. At least one processor extracts a list of food items from the description; classifies and segments the at least one food item from the list using color and texture features derived from the plurality of images; and estimates the volume of the classified and segmented at least one food item. The processor is also configured to estimate the caloric content of the at least one food item.Type: ApplicationFiled: November 20, 2017Publication date: March 15, 2018Inventors: Manika PURI, Zhiwei Zhu, Jeffrey Lubin, Tom Pschar, Ajay Divakaran, Harpreet Sawhney
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Patent number: 9892563Abstract: A system and method for generating a mixed-reality environment is provided. The system and method provides a user-worn sub-system communicatively connected to a synthetic object computer module. The user-worn sub-system may utilize a plurality of user-worn sensors to capture and process data regarding a user's pose and location. The synthetic object computer module may generate and provide to the user-worn sub-system synthetic objects based information defining a user's real world life scene or environment indicating a user's pose and location. The synthetic objects may then be rendered on a user-worn display, thereby inserting the synthetic objects into a user's field of view. Rendering the synthetic objects on the user-worn display creates the virtual effect for the user that the synthetic objects are present in the real world.Type: GrantFiled: March 21, 2017Date of Patent: February 13, 2018Assignee: SRI InternationalInventors: Rakesh Kumar, Taragay Oskiper, Oleg Naroditsky, Supun Samarasekera, Zhiwei Zhu, Janet Yonga Kim Knowles
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Publication number: 20180017324Abstract: The present invention discloses a method for freeze-drying drug liposomes powder assisted by a variable-frequency alternating-current electric field, which includes the following steps: (1) preparing a drug-liposome suspension sample; (2) dehydrating the sample under a 1-10 kHz, 3-10 kV high-voltage alternating current; (3) freezing and drying the sample treated in step (2) at ?20° C. to ?40° C., under a 10-25 kHz, 0.2-1 kV high-voltage alternating current, until completion of the freezing process; and (4) heating and drying the sample in a vacuum until completion of sublimation and desorption, and obtaining the drug liposomes freeze-dried powder. The present invention not only greatly shortens a freezing and drying time, but also controls a size of nuclei and ice crystals, further ensuring a quality of the freeze-dried powder.Type: ApplicationFiled: December 29, 2015Publication date: January 18, 2018Inventors: Dawen Sun, Lina Cheng, Zhiwei Zhu, Xin'an Zeng, Qijun Wang, Zi Zhang
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Patent number: 9775299Abstract: A noninvasive method of source-sink regulation in rice belongs to the technical field of rice production. In this method, the source-sink relationship is regulated by a rice sterile line and its identical type of maintaining line being subjected to mixed-planting and insulated pollination, or sowing and transplanting at different times and insulated pollination, so as to construct rice plant samples with gradient difference of source-sink levels. The present invention is a kind of native, natural noninvasive method of source-sink regulation, which could broaden the traditional thinking of source-sink theoretical research, especially overcome the deficiency in conventional methods such as leaf-cutting, spikelet-thinning that lead to physical injury or physiological interference.Type: GrantFiled: September 24, 2013Date of Patent: October 3, 2017Assignee: CHINA NATIONAL RICE RESEARCH INSTITUTEInventors: Weixing Zhang, Zhiwei Zhu, Xiyuan Liao, Xihong Shen, Guosheng Shao, Jie Min, Weigui Zhang
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Patent number: 9734414Abstract: A system and method for efficiently locating in 3D an object of interest in a target scene using video information captured by a plurality of cameras. The system and method provide for multi-camera visual odometry wherein pose estimates are generated for each camera by all of the cameras in the multi-camera configuration. Furthermore, the system and method can locate and identify salient landmarks in the target scene using any of the cameras in the multi-camera configuration and compare the identified landmark against a database of previously identified landmarks. In addition, the system and method provide for the integration of video-based pose estimations with position measurement data captured by one or more secondary measurement sensors, such as, for example, Inertial Measurement Units (IMUs) and Global Positioning System (GPS) units.Type: GrantFiled: August 25, 2015Date of Patent: August 15, 2017Assignee: SRI InternationalInventors: Supun Samarasekera, Rakesh Kumar, Taragay Oskiper, Zhiwei Zhu, Oleg Naroditsky, Harpreet Sawhney
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Publication number: 20170193710Abstract: A system and method for generating a mixed-reality environment is provided. The system and method provides a user-worn sub-system communicatively connected to a synthetic object computer module. The user-worn sub-system may utilize a plurality of user-worn sensors to capture and process data regarding a user's pose and location. The synthetic object computer module may generate and provide to the user-worn sub-system synthetic objects based information defining a user's real world life scene or environment indicating a user's pose and location. The synthetic objects may then be rendered on a user-worn display, thereby inserting the synthetic objects into a user's field of view. Rendering the synthetic objects on the user-worn display creates the virtual effect for the user that the synthetic objects are present in the real world.Type: ApplicationFiled: March 21, 2017Publication date: July 6, 2017Inventors: Rakesh Kumar, Targay Oskiper, Oleg Naroditsky, Supun Samarasekera, Zhiwei Zhu, Janet Kim
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Patent number: 9600067Abstract: A system and method for generating a mixed-reality environment is provided. The system and method provides a user-worn sub-system communicatively connected to a synthetic object computer module. The user-worn sub-system may utilize a plurality of user-worn sensors to capture and process data regarding a user's pose and location. The synthetic object computer module may generate and provide to the user-worn sub-system synthetic objects based information defining a user's real world life scene or environment indicating a user's pose and location. The synthetic objects may then be rendered on a user-worn display, thereby inserting the synthetic objects into a user's field of view. Rendering the synthetic objects on the user-worn display creates the virtual effect for the user that the synthetic objects are present in the real world.Type: GrantFiled: October 27, 2009Date of Patent: March 21, 2017Assignee: SRI InternationalInventors: Rakesh Kumar, Targay Oskiper, Oleg Naroditsky, Supun Samarasekera, Zhiwei Zhu, Janet Kim
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Publication number: 20160078303Abstract: A system and method for efficiently locating in 3D an object of interest in a target scene using video information captured by a plurality of cameras. The system and method provide for multi-camera visual odometry wherein pose estimates are generated for each camera by all of the cameras in the multi-camera configuration. Furthermore, the system and method can locate and identify salient landmarks in the target scene using any of the cameras in the multi-camera configuration and compare the identified landmark against a database of previously identified landmarks. In addition, the system and method provide for the integration of video-based pose estimations with position measurement data captured by one or more secondary measurement sensors, such as, for example, Inertial Measurement Units (IMUs) and Global Positioning System (GPS) units.Type: ApplicationFiled: August 25, 2015Publication date: March 17, 2016Inventors: Supun Samarasekera, Rakesh Kumar, Taragay Oskiper, Zhiwei Zhu, Oleg Naroditsky, Harpreet Sawhney
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Patent number: 9209029Abstract: An asymetric gate MOS device is disclosed. The gate is a metal gate, and the metal gate has a different work function on the source side from that on the drain side of the MOS device, so that the overall performance parameters of the MOS device are more optimized. A method of making an asymetric gate MOS device is also disclosed. In the method, dopant ions are implanted into the gate of the MOS device, so as to cause the gate to have a different work function on the source side from that on the drain side of the MOS device. As a result, the overall performance parameters of the MOS device are more optimized. The method can be easily implemented.Type: GrantFiled: December 28, 2011Date of Patent: December 8, 2015Assignee: FUDAN UNIVERSITYInventors: Dongping Wu, Cheng Hu, Lun Zhu, Zhiwei Zhu, Shili Zhang, Wei Zhang
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Publication number: 20150282432Abstract: A noninvasive method of source-sink regulation in rice belongs to the technical field of rice production. In this method, the source-sink relationship is regulated by a rice sterile line and its identical type of maintaining line being subjected to mixed-planting and insulated pollination, or sowing and transplanting at different times and insulated pollination, so as to construct rice plant samples with gradient difference of source-sink levels. The present invention is a kind of native, natural noninvasive method of source-sink regulation, which could broaden the traditional thinking of source-sink theoretical research, especially overcome the deficiency in conventional methods such as leaf-cutting, spikelet-thinning that lead to physical injury or physiological interference.Type: ApplicationFiled: September 24, 2013Publication date: October 8, 2015Inventors: Weixing Zhang, Zhiwei Zhu, Xiyuan Liao, Xihong Shen, Guosheng Shao, Jie Min, Weigui Zhang
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Patent number: 9121713Abstract: A system and method for efficiently locating in 3D an object of interest in a target scene using video information captured by a plurality of cameras. The system and method provide for multi-camera visual odometry wherein pose estimates are generated for each camera by all of the cameras in the multi-camera configuration. Furthermore, the system and method can locate and identify salient landmarks in the target scene using any of the cameras in the multi-camera configuration and compare the identified landmark against a database of previously identified landmarks. In addition, the system and method provide for the integration of video-based pose estimations with position measurement data captured by one or more secondary measurement sensors, such as, for example, Inertial Measurement Units (IMUs) and Global Positioning System (GPS) units.Type: GrantFiled: April 19, 2012Date of Patent: September 1, 2015Assignee: SRI InternationalInventors: Supun Samarasekera, Rakesh Kumar, Taragay Oskiper, Zhiwei Zhu, Oleg Naroditsky, Harpreet Sawhney
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Patent number: 9117068Abstract: A user creates a pattern in a two-dimensional grid by entering a password and enters a user name. This user name, password and pattern are stored locally on a computing device or are transmitted to a remote computer server for later authentication. Upon authentication, a choice of input grids is displayed. The user chooses a grid, enters the password into the grid in the form of the pattern, and also enters the user name. The computer retrieves the previously stored pattern and password with the user name. A match with the stored password indicates authentication. Each cell of the input grid may contain more than one symbol of the password. The input grid may also be filled with random characters to improve security. A grid may be a rectangular matrix, a circular region, an asymmetrical region, or other.Type: GrantFiled: September 25, 2013Date of Patent: August 25, 2015Assignee: Trend Micro Inc.Inventors: Lei Zhang, Zhiwei Zhu
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Patent number: 9031809Abstract: A method and apparatus for providing three-dimensional navigation for a node comprising an inertial measurement unit for providing gyroscope, acceleration and velocity information (collectively IMU information); a ranging unit for providing distance information relative to at least one reference node; at least one visual sensor for providing images of an environment surrounding the node; a preprocessor, coupled to the inertial measurement unit, the ranging unit and the plurality of visual sensors, for generating error states for the IMU information, the distance information and the images; and an error-state predictive filter, coupled to the preprocessor, for processing the error states to produce a three-dimensional pose of the node.Type: GrantFiled: July 14, 2011Date of Patent: May 12, 2015Assignee: SRI InternationalInventors: Rakesh Kumar, Supun Samarasekera, Han-Pang Chiu, Zhiwei Zhu, Taragay Oskiper, Lu Wang, Raia Hadsell
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Patent number: 8989483Abstract: A method and apparatus for determining a geographic location of a scene in a captured depiction comprising extracting a first set of features from the captured depiction by algorithmically analyzing the captured depiction, matching the extracted features of the captured depiction against a second set of extracted features associated with reference depictions with known geographic locations and when the matching is successful, identifying the geographic location of the scene in the captured depiction based on a known geographic location of a matching reference depiction from the reference depictions.Type: GrantFiled: June 11, 2012Date of Patent: March 24, 2015Assignee: SRI InternationalInventors: Hui Cheng, Harpreet Singh Sawhney, Bogdan Calin Mihai Matei, Zhiwei Zhu, Nicholas John Vander Valk
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Publication number: 20140310595Abstract: A computing system for virtual personal assistance includes technologies to, among other things, correlate an external representation of an object with a real world view of the object, display virtual elements on the external representation of the object and/or display virtual elements on the real world view of the object, to provide virtual personal assistance in a multi-step activity or another activity that involves the observation or handling of an object and a reference document.Type: ApplicationFiled: June 24, 2014Publication date: October 16, 2014Inventors: Girish Acharya, Rakesh Kumar, Supun Samarasekara, Louise Yarnall, Michael John Wolverton, Zhiwei Zhu, Ryan Villamil, Vlad Braznoi, James F. Carpenter, Glenn A. Murray
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Publication number: 20140176603Abstract: A method and apparatus for training and guiding users comprising generating a scene understanding based on video and audio input of a scene of a user performing a task in the scene, correlating the scene understanding with a knowledge base to produce a task understanding, comprising one or more goals, of a current activity of the user, reasoning, based on the task understanding and a user's current state, a next step for advancing the user towards completing one of the one or more goals of the task understanding and overlaying the scene with an augmented reality view comprising one or more visual and audio representation of the next step to the user.Type: ApplicationFiled: December 20, 2012Publication date: June 26, 2014Applicant: SRI INTERNATIONALInventors: RAKESH KUMAR, SUPUN SAMARASEKERA, GIRISH ACHARYA, MICHAEL JOHN WOLVERTON, NECIP FAZIL AYAN, ZHIWEI ZHU, RYAN VILLAMIL