Patents by Inventor Chunlei Yu
Chunlei Yu 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: 11968983Abstract: The present disclosure discloses a tobacco leaf foliar spraying substance for reducing harmful ingredients in cheroot, a method for reducing carcinogenic components in flue-cured tobacco leaves and flue-cured tobacco shreds. The tobacco leaf foliar spraying substance contains a lotus leaf extract, the harmful chemical ingredients comprise N-nitrosonornicotine, 4-(N-methyl-nitrosamine)-1-(3-pyridinyl)-1-butanone, N-nitrosoanabasine and N-nitrosoanatabine. Foliar spraying is performed on a fertile field by using the lotus leaf extract before tobacco leaves are harvested and modulated, which not only significantly promotesagronomic characters and economic traits of tobacco and alleviates tobacco leaf browning but also effectively reduces harmful chemical ingredients unique to tobacco leaves, such as nitrosamine and nicotine.Type: GrantFiled: June 17, 2023Date of Patent: April 30, 2024Assignee: HUBEI INSTITUTE OF TOBACCO SCIENCEInventors: Chunlei Yang, Jinpeng Yang, Jun Zhou, Mei Yang, Yong Yang, Jun Yu, Zongping Li, Xiongfei Rao, Guangjiong Qin, Baoming Qiao, Ruoshi Bai, Yanjun Ma, Xianbao Deng, Wenzhang Qin, Kaixiao Fan, Candong Deng, Yongle Wei, Youlun Fan
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Publication number: 20240119922Abstract: An unsupervised text to speech system utilizing a lexicon to map input text to the phoneme sequence, which is expanded to the frame-level forced alignment with a speaker-dependent duration model. An alignment mapping module that converts the forced alignment to the unsupervised alignment (UA). Afterword, a Conditional Disentangled Sequential Variational Auto-encoder (C-DSVAE), serving as the self-supervised TTS AM, takes the predicted UA and a target speaker embedding to generate the mel spectrogram, which is ultimately converted to waveform with a neural vocoder.Type: ApplicationFiled: September 27, 2022Publication date: April 11, 2024Applicant: Tencent America LLCInventors: Chunlei ZHANG, Jiachen LIAN, Dong YU
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Patent number: 11940695Abstract: A manufacturing method of a light modulation panel, a light modulation panel and a light modulation device. The light modulation panel comprises: a first substrate and a second substrate arranged in align with each other, a liquid crystal filled between the first substrate and the second substrate, and spacer structures located between the first substrate and the second substrate and configured to maintain a cell gap of the liquid crystal; wherein the spacer structures comprise a first post spacer and a second post spacer arranged in a cascaded manner, the first post spacer is arranged on a side of the first substrate close to the second substrate, the second post spacer is arranged on a side of the second substrate close to the first substrate.Type: GrantFiled: September 23, 2021Date of Patent: March 26, 2024Assignees: Beijing BOE Sensor Technology Co., Ltd., BOE Technology Group Co., Ltd.Inventors: Sikai Zhang, Chunlei Wang, Jing Yu
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Publication number: 20240085935Abstract: A method of acoustic echo suppression using a recurrent neural network, performed by at least one processor, is provided. The method includes receiving a microphone signal and a far-end reference signal, estimating an echo suppressed signal and an echo signal based on the microphone signal and the far-end reference signal, estimating enhancement filters for the microphone signal based on the echo suppressed signal and the echo signal, generating an enhanced signal based on the enhancement filters, and adjusting the enhanced signal using automatic gain control (AGC) and outputting the adjusted signal.Type: ApplicationFiled: November 17, 2023Publication date: March 14, 2024Inventors: Meng YU, Yong Xu, Chunlei Zhang, Shi-xiong Zhang, Dong Yu
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Patent number: 11780768Abstract: A photodarkening-resistant ytterbium-doped quartz optical fiber and a method for prpearing such a fiber are provided. Glass of a photodarkening-resistant ytterbium-doped quartz optical fiber core rod includes at least Yb2O3, Al2O3, P2O5, SiO2. The proportions of Yb2O3, Al2O3, and P2O5 in the entire substance are Yb2O3: 0.05-0.3 mol %, Al2O3: 1-3 mol %, and P2O5: 1-5 mol %, respectively. In the preparation method for the photodarkening-resistant ytterbium-doped quartz optical fiber, a sol-gel method and an improved chemical vapor deposition method are combined. By using the molecular-level doping uniformity and the low preparation loss thereof respectively, ytterbium ions, aluminum ions and phosphorus ions are effectively doped in a quartz matrix, thereby effectively solving the problems in the optical fiber of high loss, photodarkening caused by cluster or the like, and a central refractive index dip.Type: GrantFiled: June 6, 2019Date of Patent: October 10, 2023Assignee: SHANGHAI INSTITUTE OF OPTICS AND FINE MECHANICS, CHINESE ACADEMY OF SCIENCESInventors: Lili Hu, Fengguang Lou, Chunlei Yu, Meng Wang, Lei Zhang, Xiaoqing Xu, Danping Chen, Fan Wang, Mengting Guo
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Publication number: 20220342147Abstract: A radiation-resistant laser optical fiber preform core rod at least includes one type of activated ion (Yb3+, Er3+) and one or more types of co-doped ion (Al3+, P5+, Ge4+, Ce3+, F?), and —OD group of 16-118 ppm. Irradiation resistance of core rod glass can be effectively improved by sequentially performing pre-treatments, i.e. deuterium loading, pre-irradiation and thermal annealing on a preform core rod. Electron paramagnetic resonance test shows that, under the same radiation condition, the radiation induced color center concentration in a preform core rod treated by the method above is lower than in an untreated core rod by one or more orders of magnitude. The obtained core rod can be used for preparing a radiation-resistant rare earth-doped silica fiber, and has the advantages of high laser slope efficiency, low background loss, being able to be used stably in a vacuum environment for a long time, for example.Type: ApplicationFiled: July 1, 2020Publication date: October 27, 2022Inventors: Chongyun SHAO, Lili HU, Chunlei YU, Meng WANG, Yan JIAO, Lei ZHANG, Shikai WANG, Xiaoqing XU
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Publication number: 20210230051Abstract: A photodarkening-resistant ytterbium-doped quartz optical fiber and a method for preparing such a fiber are provided. Glass of a photodarkening-resistant ytterbium-doped quartz optical fiber core rod includes at least Yb2O3, Al2O3, P2O5, SiO2. The proportions of Yb2O3, Al2O3, and P2O5 in the entire substance are Yb2O3: 0.05-0.3 mol %, Al2O3: 1-3 mol %, and P2O5: 1-5 mol %, respectively. In the preparation method for the photodarkening-resistant ytterbium-doped quartz optical fiber, a sol-gel method and an improved chemical vapor deposition method are combined. By using the molecular-level doping uniformity and the low preparation loss thereof respectively, ytterbium ions, aluminum ions and phosphorus ions are effectively doped in a quartz matrix, thereby effectively solving the problems in the optical fiber of high loss, photodarkening caused by cluster or the like, and a central refractive index dip.Type: ApplicationFiled: June 6, 2019Publication date: July 29, 2021Inventors: Fengguang LOU, Lili HU, Chunlei YU, Meng WANG, Lei ZHANG, Xiaoqing XU, Danping CHEN
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Patent number: 10890432Abstract: A digital displacement sensor and a displacement measuring method thereof, pertaining to the technical field of displacement sensors. The digital displacement sensor includes a housing and a circuit board, and the circuit board is arranged inside the housing. The housing is provided with a window and an opening. The circuit board is provided with a signal acquisition module, an analog front end circuit, a digital compensation circuit, and a signal output interface. The digital displacement sensor allows to alternatively fix the sensor or measured object according to the structure. The measurement can be performed as long as a relative movement between the sensor and the measured object occurs. Factors such as material of the measured object etc. are not limited, so materials such as steel belts, aluminum plates, plastics etc. can be flexibly used. Merely surfaces of the measured object need to be coated with corresponding stripes.Type: GrantFiled: July 9, 2018Date of Patent: January 12, 2021Assignee: MONOLITH ELECTRIC (CHANGZHOU) CO., LTD.Inventors: Lei Liang, Qing Xia, Weijie Wu, Chunlei Yu
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Publication number: 20200208961Abstract: A digital displacement sensor and a displacement measuring method thereof, pertaining to the technical field of displacement sensors. The digital displacement sensor includes a housing and a circuit board, and the circuit board is arranged inside the housing. The housing is provided with a window and an opening. The circuit board is provided with a signal acquisition module, an analog front end circuit, a digital compensation circuit, and a signal output interface. The digital displacement sensor allows to alternatively fix the sensor or measured object according to the structure. The measurement can be performed as long as a relative movement between the sensor and the measured object occurs. Factors such as material of the measured object etc. are not limited, so materials such as steel belts, aluminum plates, plastics etc. can be flexibly used. Merely surfaces of the measured object need to be coated with corresponding stripes.Type: ApplicationFiled: July 9, 2018Publication date: July 2, 2020Applicant: Monolith Electric (Changzhou) Co.,Ltd.Inventors: Lei LIANG, Qing XIA, Weijie WU, Chunlei YU
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Patent number: 10075324Abstract: A predistortion processing apparatus: an auxiliary feedback module, configured to: extract a nonlinear distortion signal from an analog signal, and input an obtained feedback signal corresponding to the nonlinear distortion signal into an auxiliary model coefficient training module; the auxiliary model coefficient training module, configured to: train an auxiliary coefficient according to the feedback signal and a predistortion signal, and transmit a first auxiliary coefficient obtained through training to a predistortion processing module; a radio frequency signal feedback module, configured to extract a fundamental wave feedback signal; a predistortion model coefficient training module, configured to: train a predistortion coefficient according to the predistortion signal and the fundamental wave feedback signal, and transmit an obtained predistortion coefficient to the predistortion processing module; the predistortion processing module, configured to: perform predistortion processing on an input intermediType: GrantFiled: May 19, 2017Date of Patent: September 11, 2018Assignee: Huawei Technologies Co., Ltd.Inventors: Yanqing Zhao, Chunlei Yu, Tingjian Tian
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Publication number: 20170257251Abstract: A predistortion processing apparatus: an auxiliary feedback module, configured to: extract a nonlinear distortion signal from an analog signal, and input an obtained feedback signal corresponding to the nonlinear distortion signal into an auxiliary model coefficient training module; the auxiliary model coefficient training module, configured to: train an auxiliary coefficient according to the feedback signal and a predistortion signal, and transmit a first auxiliary coefficient obtained through training to a predistortion processing module; a radio frequency signal feedback module, configured to extract a fundamental wave feedback signal; a predistortion model coefficient training module, configured to: train a predistortion coefficient according to the predistortion signal and the fundamental wave feedback signal, and transmit an obtained predistortion coefficient to the predistortion processing module; the predistortion processing module, configured to: perform predistortion processing on an input intermediType: ApplicationFiled: May 19, 2017Publication date: September 7, 2017Inventors: Yanqing Zhao, Chunlei Yu, Tingjian TIAN