Patents by Inventor Jijun Zou
Jijun Zou 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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Publication number: 20250038838Abstract: A frequency-shift symmetric chirp spread spectrum modulation and demodulation method for interstellar communication links. The transmission process includes several steps: serial-to-parallel conversion, index addition, Gray coding, binary-to-decimal conversion, and frequency-shift symmetric chirp spread spectrum modulation. On the other hand, the reception process comprises demodulation of the symmetric chirp signal, fast Fourier transform, peak retrieval, decimal-to-binary conversion, Gray decoding, index removal, and parallel-to-serial conversion. The frame structure includes a preamble code, synchronization word, and user data. The symmetric chirp signal includes a pair of chirp signals with opposite polarities, ensuring the continuity of phase and frequency during the signal concatenation process.Type: ApplicationFiled: July 28, 2023Publication date: January 30, 2025Inventors: Xiaofeng JIN, Jie LI, Xiangdong JIN, Jijun ZOU, Bing WEI
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Publication number: 20250030967Abstract: A distributed multi-antenna collaborative phase stabilization device for future broadband wireless communication. The device includes a central station and various antenna terminals interconnected via optical fibers to form a linear communication system. The distributed multi-antenna reception signals are optically modulated at the antenna terminals into different wavelengths of optical signals, and then coupled into a single optical fiber using wavelength division multiplexing technology for transmission to the central station. At the central station, the optical signals are converted back into the original RF (radio frequency) signals through optoelectronic conversion.Type: ApplicationFiled: July 21, 2023Publication date: January 23, 2025Inventors: Xiaofeng JIN, Jijun ZOU, Ling YANG, Zhiwei LI, Yafeng ZHU, Bing WEI
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Patent number: 12162812Abstract: Provided are a precursor compound of a tetracyclic hydrocarbon and a preparation method thereof, and a tetracyclic hydrocarbon and a preparation method and use thereof. The precursor compound of the tetracyclic hydrocarbon with a structure shown in formula I has a polycyclic structure. The precursor compound is subjected to hydrodeoxygenation so as to be prepared into the tetracyclic hydrocarbon with a structure shown in formula II that has a high density (0.986 g/cm3), a high calorific value (41.14 MJ/L), and a low freezing point (less than ?60° C.).Type: GrantFiled: March 29, 2024Date of Patent: December 10, 2024Assignee: TIANJIN UNIVERSITYInventors: Lun Pan, Jijun Zou, Xinfang Zhang, Chengxiang Shi, Li Wang, Xiangwen Zhang
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Publication number: 20240327318Abstract: Provided are a precursor compound of a tetracyclic hydrocarbon and a preparation method thereof, and a tetracyclic hydrocarbon and a preparation method and use thereof. The precursor compound of the tetracyclic hydrocarbon with a structure shown in formula I has a polycyclic structure. The precursor compound is subjected to hydrodeoxygenation so as to be prepared into the tetracyclic hydrocarbon with a structure shown in formula II that has a high density (0.986 g/cm3), a high calorific value (41.14 MJ/L), and a low freezing point (less than ?60° C.).Type: ApplicationFiled: March 29, 2024Publication date: October 3, 2024Inventors: Lun PAN, Jijun ZOU, Xinfang ZHANG, Chengxiang SHI, Li WANG, Xiangwen ZHANG
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Patent number: 11661417Abstract: The present disclosure provides a low-molecular mass organic gellant and a preparation method and use thereof, belonging to the technical field of gelled fuels. The low-molecular mass organic gellant has a cyclopropane structure. The cyclopropane structure belongs to a high-tension structure, which endows the gellant with excellent gel properties; in addition, the high-tension cyclopropane structure is also capable of greatly improving a combustion performance of the gellant, shortening an ignition delay time of the fuel, and promoting combustion. Moreover, multiple hydroxyl groups contained in the low-molecular mass organic gellant is capable of effectively forming a gel through hydrogen bonding; therefore, the gellant has excellent gel and shear thinning properties for high-energy density fuel and energetic nanofluid fuel, with a critical gellant concentration of not greater than 1% when forming a stable gel.Type: GrantFiled: June 30, 2022Date of Patent: May 30, 2023Assignee: Tianjin UniversityInventors: Lun Pan, Jijun Zou, Yang Liu, Xiangwen Zhang
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Publication number: 20230061028Abstract: The present disclosure provides a low-molecular mass organic gellant and a preparation method and use thereof, belonging to the technical field of gelled fuels. The low-molecular mass organic gellant has a cyclopropane structure. The cyclopropane structure belongs to a high-tension structure, which endows the gellant with excellent gel properties; in addition, the high-tension cyclopropane structure is also capable of greatly improving a combustion performance of the gellant, shortening an ignition delay time of the fuel, and promoting combustion. Moreover, multiple hydroxyl groups contained in the low-molecular mass organic gellant is capable of effectively forming a gel through hydrogen bonding; therefore, the gellant has excellent gel and shear thinning properties for high-energy density fuel and energetic nanofluid fuel, with a critical gellant concentration of not greater than 1% when forming a stable gel.Type: ApplicationFiled: June 30, 2022Publication date: March 2, 2023Applicant: Tianjin UniversityInventors: Lun Pan, Jijun Zou, Yang Liu, Xiangwen Zhang
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Patent number: 11524276Abstract: Provided is a p-type TiO2/n-type WO3 heterojunction catalyst and a preparation method and use thereof. The catalyst comprises p-type TiO2 and n-type WO3 supported on a surface of the p-type TiO2.Type: GrantFiled: October 1, 2020Date of Patent: December 13, 2022Assignee: Tianjin UniversityInventors: Lun Pan, Jijun Zou, Ying Chen, Xiangwen Zhang, Li Wang
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Publication number: 20210322954Abstract: The present disclosure relates to the field of the catalytic technologies, and provides a p-type TiO2/n-type WO3 heterojunction catalyst and its preparation and use in photochemical synthesis of fuels. The catalyst comprises p-type TiO2 and n-type WO3 supported on a surface of the p-type TiO2. The disclosure proposes to support n-type WO3 onto a surface of p-type TiO2. The catalyst has high catalytic efficiency, and is particularly suitable for use in photocatalytic processes for synthesizing fuels.Type: ApplicationFiled: October 1, 2020Publication date: October 21, 2021Applicant: Tianjin UniversityInventors: Lun Pan, Jijun Zou, Ying Chen, Xiangwen Zhang, Li Wang
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Patent number: 11047014Abstract: The invention relates to a method for quantifying levels of expression and/or quantifying copy number of a heterologous polynucleotide in a transgenic plant using quantitative or real-time polymerase chain reaction (QPCR or real-time PCR), wherein the real-time PCR is performed using a primer set specific to a heterologous terminator sequence operably linked to the heterologous polynucleotide.Type: GrantFiled: July 23, 2018Date of Patent: June 29, 2021Inventors: Igor Cunha De Oliveira, Dennis O'Neill, Andrew Slattery, Jijun Zou
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Patent number: 10689309Abstract: A process for preparing a fused-ring alkane fuel, wherein the fused-ring alkane fuel has the following structure: wherein n is 1 or 2; R1, R2, R3, R4 and R5 are H or —CH3 or —CH2CH3; the fused-ring alkane fuel has a density of greater than 0.870 g/cm3, a freezing point of not higher than ?50° C., and a net mass heat value of not less than 42.0 MJ/kg; the process for preparing a fused-ring alkane fuel, wherein the process includes steps of: (1) in a presence of ultraviolet light and a photocatalyst, a Diels-Alder cycloaddition reaction between a substituted or unsubstituted cyclic enone and a substituted or unsubstituted furan molecule occurs to produce a fuel precursor molecule: (2) the fuel precursor molecule obtained in the step (1) is subjected to hydrodeoxygenation to produce the fused-ring alkane fuel.Type: GrantFiled: July 9, 2018Date of Patent: June 23, 2020Assignee: TIANJIN UNIVERSITYInventors: Jijun Zou, Lun Pan, Xiangwen Zhang, Qingfa Wang
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Publication number: 20200181040Abstract: A process for preparing a fused-ring alkane fuel, wherein the fused-ring alkane fuel has the following structure: wherein n is 1 or 2; R1, R2, R3, R4 and R5 are H or —CH3 or —CH2CH3; the fused-ring alkane fuel has a density of greater than 0.870 g/cm3, a freezing point of not higher than ?50° C., and a net mass heat value of not less than 42.0 MJ/kg; the process for preparing a fused-ring alkane fuel, wherein the process includes steps of: (1) in a presence of ultraviolet light and a photocatalyst, a Diels-Alder cycloaddition reaction between a substituted or unsubstituted cyclic enone and a substituted or unsubstituted furan molecule occurs to produce a fuel precursor molecule: (2) the fuel precursor molecule obtained in the step (1) is subjected to hydrodeoxygenation to produce the fused-ring alkane fuel.Type: ApplicationFiled: July 9, 2018Publication date: June 11, 2020Applicant: TIANJIN UNIVERSITYInventors: Jijun ZOU, Lun PAN, Xiangwen ZHANG, Qingfa WANG
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Patent number: 10519081Abstract: A process for preparation of a bicyclic fused-ring alkane. In the presence of a bifunctional solid catalyst, one or more cyclitols undergo a C—C coupling reaction with itself or each other at a temperature and in a nitrogen gas atmosphere, to produce a bicyclic alkane precursor mixture; then, the nitrogen gas is replaced by hydrogen gas, and the bicyclic alkane precursor mixture is hydrogenated or hydrodeoxygenated at a temperature and under a pressure, to produce the bicyclic fused-ring alkane. The proportion of the bicyclic fused-ring alkane in the product as prepared according to the process is not lower than 80 wt %.Type: GrantFiled: October 12, 2018Date of Patent: December 31, 2019Assignee: TIANJIN UNIVERSITYInventors: Jijun Zou, Genkuo Nie, Lun Pan, Xiangwen Zhang
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Patent number: 10233135Abstract: The present invention discloses a process for preparing perhydrofluorene or alkyl-substituted perhydrofluorene, comprising the steps of: (1) reacting a phenolic compound or an aromatic hydrocarbon compound or an aromatic ketone compound or an aromatic ether compound with a benzyl compound to carry out an alkylation reaction in the presence of a first catalyst, thereby to produce substituted or unsubstituted diphenyl methane, wherein the first catalyst is an acidic catalyst; and (2) reacting the substituted or unsubstituted diphenyl methane with hydrogen gas to carry out an hydrogenation reaction or a hydrodeoxygenation reaction, thereby to produce perhydrofluorene or alkyl-substituted perhydrofluorene, wherein the second catalyst is a physical mixture of a metal catalyst and an acidic catalyst or a metal catalyst loaded on an acidic catalyst.Type: GrantFiled: July 11, 2016Date of Patent: March 19, 2019Assignee: TIANJIN UNIVERSITYInventors: Jijun Zou, Lun Pan, Xiangwen Zhang, Qingfa Wang, Li Wang
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Publication number: 20190031576Abstract: The present invention discloses a process for preparing perhydrofluorene or alkyl-substituted perhydrofluorene, comprising the steps of: (1) reacting a phenolic compound or an aromatic hydrocarbon compound or an aromatic ketone compound or an aromatic ether compound with a benzyl compound to carry out an alkylation reaction in the presence of a first catalyst, thereby to produce substituted or unsubstituted diphenyl methane, wherein the first catalyst is an acidic catalyst; and (2) reacting the substituted or unsubstituted diphenyl methane with hydrogen gas to carry out an hydrogenation reaction or a hydrodeoxygenation reaction, thereby to produce perhydrofluorene or alkyl-substituted perhydrofluorene, wherein the second catalyst is a physical mixture of a metal catalyst and an acidic catalyst or a metal catalyst loaded on an acidic catalyst.Type: ApplicationFiled: July 11, 2016Publication date: January 31, 2019Inventors: Jijun ZOU, Lun PAN, Xiangwen ZHANG, Qingfa WANG, Li WANG
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Patent number: 10137443Abstract: The present invention discloses a composite catalyst for the photocatalytic isomerization of norbornadiene to prepare quadricyclane, comprising: a solid photocatalyst, selected from the group consisting of TiO2, Ti-MCM-41, Ti-SBA-15, ZnO, WO3, Ta2O5 or SrTiO3; and an organic photo-sensitizer loaded on the surface or in the channel of said solid photocatalyst, selected from benzophenone, acetophenone, Michler's Ketone, tetraethyl Michler's Ketone, and diethyl Michler's Ketone, where the organic photo-sensitizer is present in the solid photocatalyst in an amount of 0.5% to 20% by weight. The catalyst of the invention can catalyze a target reaction under the condition that no solvent is used, and the yield of the target product quadricyclane is higher. Furthermore, the catalyst of the invention has a stable activity, and it can be recycled. The invention further discloses a process for preparing the composite catalyst.Type: GrantFiled: May 23, 2014Date of Patent: November 27, 2018Assignee: TIANJIN UNIVERSITYInventors: Jijun Zou, Xiangwen Zhang, Li Wang, Qingfa Wang
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Publication number: 20180327868Abstract: The invention relates to a method for quantifying levels of expression and/or quantifying copy number of a heterologous polynucleotide in a transgenic plant using quantitative or real-time polymerase chain reaction (QPCR or real-time PCR), wherein the real-time PCR is performed using a primer set specific to a heterologous terminator sequence operably linked to the heterologous polynucleotide.Type: ApplicationFiled: July 23, 2018Publication date: November 15, 2018Applicants: E. I. DU PONT DE NEMOURS AND COMPANY, PIONEER HI-BRED INTERNATIONAL, INC.Inventors: IGOR CUNHA DE OLIVEIRA, DENNIS O'NEILL, ANDREW SLATTERY, JIJUN ZOU
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Patent number: 9944574Abstract: The invention discloses a continuous process for producing high-pure quadricyclane, in which “a reaction-rectification integral process” or “a reaction followed by rectification process” may be employed. The two processes both use a novel composite catalyst which is obtained by loading an organic photo-sensitizer on a solid photocatalyst, and the composite catalyst has a high activity and a good stability. In the reaction-rectification integral process, the composite catalyst is used by being blended with rectification fillers or covering the rectification fillers, so as to achieve the integration of the reaction and the rectification. In the reaction followed by rectification process, the composite catalyst and the rectification fillers are placed separately from each other. The two processes achieve a relatively short residence time of reactants, produce highly-pure quadricyclane, and reduce the formation of cokes.Type: GrantFiled: May 23, 2014Date of Patent: April 17, 2018Assignee: TIANJIN UNIVERSITYInventors: Jijun Zou, Xiangwen Zhang, Li Wang, Qingfa Wang
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Publication number: 20160339415Abstract: The present invention discloses a composite catalyst for the photocatalytic isomerisation of norbornadiene to prepare quadricyclane, comprising: a solid photocatalyst, selected from the group consisting of TiO2, Ti-MCM-41, Ti-SBA-15, ZnO, WO3, Ta2O5 or SrTiO3; and an organic photo-sensitizer loaded on the surface or in the channel of said solid photocatalyst, selected from benzophenone, acetophenone, Michler's Ketone, tetraethyl Michler's Ketone, and diethyl Michler's Ketone, where the organic photo-sensitizer is present in the solid photocatalyst in an amount of 0.5% to 20% by weight. The catalyst of the invention can catalyze a target reaction under the condition that no solvent is used, and the yield of the target product quadricyclane is higher. Furthermore, the catalyst of the invention has a stable activity, and it can be recycled. The invention further discloses a process for preparing the composite catalyst.Type: ApplicationFiled: May 23, 2014Publication date: November 24, 2016Applicant: TIANJIN UNIVERSITYInventors: Jijun ZOU, Xiangwen ZHANG, Li WANG, Qingfa WANG
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Publication number: 20160340273Abstract: The invention discloses a continuous process for producing high-pure quadricyclane, in which “a reaction-rectification integral process” or “a reaction followed by rectification process” may be employed. The two processes both use a novel composite catalyst which is obtained by loading an organic photo-sensitizer on a solid photocatalyst, and the composite catalyst has a high activity and a good stability. In the reaction-rectification integral process, the composite catalyst is used by being blended with rectification fillers or covering the rectification fillers, so as to achieve the integration of the reaction and the rectification. In the reaction followed by rectification process, the composite catalyst and the rectification fillers are placed separately from each other. The two processes achieve a relatively short residence time of reactants, produce highly-pure quadricyclane, and reduce the formation of cokes.Type: ApplicationFiled: May 23, 2014Publication date: November 24, 2016Inventors: Jijun ZOU, Xiangwen ZHANG, Li WANG, Qingfa WANG
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Publication number: 20160002648Abstract: The present disclosure provides methods to increase crop yield utilizing transgenic genes controlling plant growth and yield. The specific genes can be used to increase tissue growth and abiotic stress tolerance. Plants, plant progeny, seeds and tissues created by these methods are also described. Polynucleotides encoding the sequences are provided for expression in a plant of interest. Expression cassettes, plants, plant cells, plant parts and seeds comprising the sequences of the disclosure are further provided. In specific embodiments, the polynucleotide is operably linked to a constitutive promoter.Type: ApplicationFiled: March 3, 2014Publication date: January 7, 2016Inventors: MEI GUO, KEVIN HAYES, BROOKE PETERSON-BURCH, CARL SIMMONS, SOBHANA SIVASANKAR, JIJUN ZOU