Patents by Inventor Zhengjun Zhou
Zhengjun Zhou 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: 11999981Abstract: Disclosed are an agarase mutant with improved thermal stability and application thereof, belonging to the fields of genetic engineering technology and enzyme engineering. The present disclosure provides an agarase mutant, which is obtained by mutating the amino acid at the 86th site, the 373rd site, the 374th site, the 496th site, the 507th site, or the 747th site of agarase with an amino acid sequence as shown in SEQ ID NO. 1. The agarase mutant provided by the present disclosure improves the thermal stability and the hydrolytic activity of the agarase. Compared with the wild type enzyme, the mutant enzyme shows excellent heat resistance and can be industrially used at a relatively high temperature, so that the utilization rate of agar raw materials and the yield of oligosaccharides from agar are improved, and the mutant enzyme has a good industrial application prospect.Type: GrantFiled: October 19, 2023Date of Patent: June 4, 2024Assignee: JIANGNAN UNIVERSITYInventors: Jie Long, Ziying Ye, Zhengyu Jin, Cheng Lu, Xingfei Li, Yaoqi Tian, Yuxiang Bai, Xing Zhou, Chao Qiu, Long Chen, Zhengjun Xie
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Publication number: 20240174770Abstract: A method for preparing V-type porous starch includes: mixing starch and a first ethanol solution in a reaction kettle, adding concentrated hydrochloric acid to the reaction kettle for acidity regulation, and controlling a temperature of a reaction system in the reaction kettle at 80-150° C.; cooling the reaction kettle, and adding a sodium hydroxide solution to the reaction system in the reaction kettle, until a pH of a mixture in the reaction kettle is neutral, to yield a starch solution; and centrifuging the starch solution, washing a collected precipitate with a second ethanol solution, leaching, drying, cooling, and pulverizing, to yield V-type porous starch.Type: ApplicationFiled: November 30, 2023Publication date: May 30, 2024Inventors: Xing ZHOU, Xiaoli LIANG, Zhengyu JIN, Ren WANG, Zhengjun XIE, Jianwei ZHAO, Jie LONG, Long CHEN, Chao QIU
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Patent number: 10649403Abstract: The present invention discloses a process cartridge and a power supply method therefor. The process cartridge is detachably mounted in an electrophotographic image forming apparatus, comprising a developing member rotatably mounted in the process cartridge and a voltage generating unit, the voltage generating unit is electrically connected to the conductive contact and the developing member. The process cartridge supplies power by using a data line, and the power supply method comprises: providing a conductor, and transmitting electric energy on the data line to the voltage generating unit by using the conductor. When the process cartridge is mounted in an electrophotographic image forming apparatus that outputs a DC bias voltage, because the voltage generating unit can generate an AC bias voltage, the process cartridge can work in an electrophotographic image forming apparatus that outputs a DC bias voltage and also in an apparatus that outputs an AC bias voltage.Type: GrantFiled: August 20, 2018Date of Patent: May 12, 2020Assignee: ZHONGSHAN KINGWAY IMAGE TECH CO., LTD.Inventors: Xueping Ding, Junqing Liu, Zhengjun Zhou, Jizhong Wang
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Publication number: 20180356766Abstract: The present invention discloses a process cartridge and a power supply method therefor. The process cartridge is detachably mounted in an electrophotographic image forming apparatus, comprising a developing member rotatably mounted in the process cartridge and a voltage generating unit, the voltage generating unit is electrically connected to the conductive contact and the developing member. The process cartridge supplies power by using a data line, and the power supply method comprises: providing a conductor, and transmitting electric energy on the data line to the voltage generating unit by using the conductor. When the process cartridge is mounted in an electrophotographic image forming apparatus that outputs a DC bias voltage, because the voltage generating unit can generate an AC bias voltage, the process cartridge can work in an electrophotographic image forming apparatus that outputs a DC bias voltage and also in an apparatus that outputs an AC bias voltage.Type: ApplicationFiled: August 20, 2018Publication date: December 13, 2018Inventors: Xueping DING, Junqing LIU, Zhengjun ZHOU, Jizhong WANG
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Patent number: 10101705Abstract: The present invention discloses a process cartridge and a power supply method therefor. The process cartridge is detachably mounted in an electrophotographic image forming apparatus, comprising a developing member rotatably mounted in the process cartridge and a voltage generating unit, the voltage generating unit is electrically connected to the conductive contact and the developing member. The process cartridge supplies power by using a data line, and the power supply method comprises: providing a conductor, and transmitting electric energy on the data line to the voltage generating unit by using the conductor. When the process cartridge is mounted in an electrophotographic image forming apparatus that outputs a DC bias voltage, because the voltage generating unit can generate an AC bias voltage, the process cartridge can work in an electrophotographic image forming apparatus that outputs a DC bias voltage and also in an apparatus that outputs an AC bias voltage.Type: GrantFiled: May 15, 2017Date of Patent: October 16, 2018Inventors: Xueping Ding, Junqing Liu, Zhengjun Zhou, Jizhong Wang
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Publication number: 20170248913Abstract: The present invention discloses a process cartridge and a power supply method therefor. The process cartridge is detachably mounted in an electrophotographic image forming apparatus, comprising a developing member rotatably mounted in the process cartridge and a voltage generating unit, the voltage generating unit is electrically connected to the conductive contact and the developing member. The process cartridge supplies power by using a data line, and the power supply method comprises: providing a conductor, and transmitting electric energy on the data line to the voltage generating unit by using the conductor. When the process cartridge is mounted in an electrophotographic image forming apparatus that outputs a DC bias voltage, because the voltage generating unit can generate an AC bias voltage, the process cartridge can work in an electrophotographic image forming apparatus that outputs a DC bias voltage and also in an apparatus that outputs an AC bias voltage.Type: ApplicationFiled: May 15, 2017Publication date: August 31, 2017Inventors: Xueping DING, Junqing LIU, Zhengjun ZHOU, Jizhong WANG
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Patent number: 7473837Abstract: Various techniques for synchronizing illumination with an audio signal are disclosed. According to one aspect of the techniques, an audio signal continuously is received and processed one phase or period at a time in an analyzing or detecting unit. From one phase of the audio signal, a set of light controlling parameters are determined from a look-up-table. These light controlling parameters are used to adjust duty cycles of square waves used to drive a plurality of light sources such that the illumination produced is in accordance with the audio signal.Type: GrantFiled: December 23, 2005Date of Patent: January 6, 2009Assignees: Vimicro International Ltd., Vimicro CorporationInventors: Songtao Cui, Zhengjun Zhou, Jun Wang
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Patent number: 7441077Abstract: Techniques for a simple file system for facilitating file transmission are disclosed. According to one aspect of the techniques, a storage device comprises a memory, a creation module, a status record module and a data reading/writing module. The creation module creates a parameter block, a file allocated table, a root directory and a data area in the memory. The starting address of the data area is calculated according to parameters in the parameter block. The status record module stores a last writing address of a last writing access to the memory. The data reading/writing module reads data from the data area according to the starting address and the last writing address.Type: GrantFiled: December 14, 2005Date of Patent: October 21, 2008Assignee: Vimicro CorporationInventors: Shuai Tan, Zhengjun Zhou, Yuan Zhao
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Publication number: 20070038835Abstract: Techniques for a simple file system for facilitating file transmission are disclosed. According to one aspect of the techniques, a storage device comprises a memory, a creation module, a status record module and a data reading/writing module. The creation module creates a parameter block, a file allocated table, a root directory and a data area in the memory. The starting address of the data area is calculated according to parameters in the parameter block. The status record module stores a last writing address of a last writing access to the memory. The data reading/writing module reads data from the data area according to the starting address and the last writing address.Type: ApplicationFiled: December 14, 2005Publication date: February 15, 2007Inventors: Shuai Tan, Zhengjun Zhou, Yuan Zhao
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Publication number: 20060137510Abstract: Various techniques for synchronizing illumination with an audio signal are disclosed. According to one aspect of the techniques, an audio signal continuously is received and processed one phase or period at a time in an analyzing or detecting unit. From one phase of the audio signal, a set of light controlling parameters are determined from a look-up-table. These light controlling parameters are used to adjust duty cycles of square waves used to drive a plurality of light sources such that the illumination produced is in accordance with the audio signal.Type: ApplicationFiled: December 23, 2005Publication date: June 29, 2006Inventors: Songtao Cui, Zhengjun Zhou, Jun Wang
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Publication number: 20060143313Abstract: Techniques for exchanging data between a storage device and a device without having data buffered in a memory of a computing device are disclosed. According to one aspect of the techniques, a method for an external device accessing a storage device via a computing device comprises sending a request to a file system of the storage device for accessing the storage device, responding with an accessing address in the storage device, and accessing directly the storage device in accordance with the accessing address without going over an external bus of a CPU in the computing device.Type: ApplicationFiled: December 14, 2005Publication date: June 29, 2006Inventors: Shuai Tan, Jian Liu, Zhengjun Zhou