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公开(公告)号：US20220209672A1
公开(公告)日：2022-06-30
申请号：US17624897
申请日：2020-04-28
Inventor： Ningfan Zhong , Zhenhai Zhang , Jianbo Wei
Abstract: The present invention relates to the technical field of high-gain DC-DC converters, and disclosed is a high-gain quasi-resonant DC-DC converter based on a voltage doubling rectifier circuit. On the basis of a half-bridge quasi-resonant high-gain circuit topology and by combining a bidirectional positive and negative voltage doubling rectifier circuit, the present invention provides a high-gain DC-DC converter. The converter can further improve output voltage gain and reduce output voltage ripples, and can improve the system efficiency while reducing the number of turns of a high-frequency transformer; moreover, the converter can achieve soft-switching control, thereby having the advantages of low voltage and current stress, high efficiency, and the like.
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公开(公告)号：US11327186B2
公开(公告)日：2022-05-10
申请号：US16603043
申请日：2018-09-27
Inventor： Yanliang Pei , Baohua Liu , Pengyao Zhi , Guangming Kan , Chenguang Liu
Abstract: The present invention discloses a submarine seismic monitoring apparatus and system based on the submarine Internet of things. A sea surface buoy network device and a submarine network device in the monitoring apparatus are connected by using an anchor system; the submarine network device and a submarine seismic detection device are connected by using a submarine photoelectric composite cable; there are one or more submarine seismic detection devices; the sea surface buoy network device includes a satellite transceiver apparatus, an Internet of things platform server, a network time server, and an autonomous energy supply apparatus; the submarine network device includes a photoelectric separation cabin, a submarine server, a bottom anchor weight block, and a mechanical releaser; and the submarine seismic detection device includes multiple submarine seismometer network nodes, where the multiple submarine seismometer network nodes are successively connected in series end to end by using the submarine photoelectric composite cable. The apparatus and system in the present invention not only can be used for submarine structure detection, but also can be used for earthquake disaster and tsunami warning, and can implement autonomous energy supply, long timing, and unattended operation.
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公开(公告)号：US11306588B2
公开(公告)日：2022-04-19
申请号：US17292152
申请日：2020-07-20
Applicant: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY , CHINA COMMUNICATIONS CONSTRUCTION CO., LTD , QINGDAO WEST COAST RAIL TRANSIT CO., LTD , QINGDAO FIRST MUNICIPAL ENGINEERING CO., LTD , HEBEI FEIPU ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD
Inventor： Xianghui Meng , Shibin Jiang , Weizhou Li , Hailiang Wang , Fu Yu , Wensheng He , Quanwei Liu , Chuan Li , Zhenbiao Wang , Lin Xin , Biao Kong , Xiangbao Meng , Yong Zhang , Wenming Zhang , Lide Hou , Jiufang Xiong , Xuanshan Zhang
Abstract: A method of treating tunnel collapse includes leveling a collapse body and moving a pavilion support under the collapse cavity, lifting a shield plate until a lower edge of the shield plate surpasses a contour line of an initial supporting arch of a tunnel, connecting a bottom column and inserting a padding plate under a column. If the hydraulic prop retracts, the column, the bottom column, the padding plate and the hydraulic prop bear a load from the shield plate. Mounting and connecting the initial supporting arch, welding the intersection point of the column and the initial supporting arch, cutting off the column in the initial supporting arch. Transferring the load of the shield plate from the pavilion support to an initial supporting shed, spraying fast-setting concrete to a grid arch to form a closed shell, and pumping filling material to fill the space of the collapse cavity.
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公开(公告)号：US11243511B2
公开(公告)日：2022-02-08
申请号：US17260744
申请日：2019-04-29
Inventor： Shun Jia , Yujie Zheng , Chao Liu , Qinghe Yuan , Zhiqiang Wang , Xiaoyuan Ma , Li Zhang , Haiyang Wang
IPC: G05B19/4155 , G06K7/10
Abstract: A load-energy efficiency evaluation and monitoring method includes an actual part processing number and a theoretical part processing number of the numerical control machine tool within an evaluation period are obtained to calculate a loading performance of the numerical control machine tool. A waste time value and a standby power value of the numerical control machine tool are obtained to calculate a waste energy value of the numerical control machine tool. A single-part actual processing energy consumption is obtained and used, together with a single-part ideal processing energy consumption, to calculate the load-energy efficiency of the numerical control machine tool. A relationship model between the load-energy efficiency and the loading performance of the numerical control machine tool is built based on the obtained model of the load-energy efficiency of the numerical control machine tool and the obtained model of the loading performance of the numerical control machine tool.
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公开(公告)号：US11215542B2
公开(公告)日：2022-01-04
申请号：US16652961
申请日：2019-02-28
Inventor： Xuesheng Liu , Shilin Song , Yunliang Tan , Deyuan Fan , Jianguo Ning , Qingheng Gu , Ning Jiang , Jun Wang , Qiang Xu
Abstract: A rock mechanics test system with impact loading-confining pressure unloading and its usage method. The test system includes bearing frame unit, axial compression loading unit, impact loading unit and confining pressure loading unit. The bearing frame unit includes pedestal, column and cross beam. The column is vertically installed on both sides of the upper surface of the pedestal, and the cross beam is horizontally fixed on the upper part of the column. The axial compression loading unit is fixed at the middle position of the upper surface of the pedestal and is used to exert the axial bottom-up pressure to the sample. The impact loading unit is fixed on the cross beam and is used to exert the axial top-down impact load on the sample.
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Patent Agency Ranking
公开(公告)号：US20210371334A1
公开(公告)日：2021-12-02
申请号：US17188087
申请日：2021-03-01
Inventor： Li Wang , Dengzheng Gao , Lihua Liu , Qingbin Guo , Zhen Xue
IPC: C04B2/10
Abstract: A method for producing a dust-reducing and dust-absorbing material from a nonmetallic mineral and a raw material from a cement plant. The method includes calcining the limestone block, to obtain quicklime; cooling the quicklime at ambient temperature, drying and pulverizing the quicklime, to obtain a first powder essentially consisting of a quicklime powder and a calcium carbonate powder; fully drying and grinding a nonmetallic mineral, to obtain a nonmetallic mineral powder; mixing the first powder and the nonmetallic mineral powder, stirring to be uniform, to obtain a mixture, and ball milling the mixture, to obtain a nano-powder; adding a dust-absorbing material to the nano-powder, adding water and mixing, and pouring the resulting mixture into a mold, and stoving; and air drying the resulting mixture, to obtain a cavernous dust-reducing and dust-absorbing material.
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公开(公告)号：US11158048B2
公开(公告)日：2021-10-26
申请号：US16957305
申请日：2019-10-21
Inventor： Haixin Peng , Yingran Ma , Yuanhong Wang , Yanjun Peng , Xinming Lu
Abstract: The present disclosure discloses a CT lymph node detection system based on a spatial-temporal recurrent attention mechanism and specifically relates to the field of medical image analysis technologies. Based on a deep convolutional neural network and a recurrent attention mechanism, the present disclosure can construct an attention feature map adaptive to a lesion size in a slice direction and a spatial direction of a lymph node CT sequence. Firstly, a high-level spatial feature corresponding to the lymph node CT image is extracted by use of a pre-trained convolutional network; secondly, a recurrent attention mechanism based on a Gaussian Kernel Function is constructed with a slice at the center of the lymph node as a reference in a spatial domain; based on this, a temporal (slice direction) attention mechanism based on a Gaussian Mixture Model is performed; in addition, a predicted attention position is constrained based on the prior information of position distribution of the lymph node in the CT slice sequence; finally, in combination with the high-level features extracted by the two attention methods, the recurrent neural network performs classification to obtain a lymph node detection result.
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公开(公告)号：US20210201634A1
公开(公告)日：2021-07-01
申请号：US17132615
申请日：2020-12-23
Inventor： Zhaohui LIU , Chao WANG , Runze SONG , Junbo WANG , Zhifa YANG , Youqi WANG , Xiangzhi ZHANG
IPC: G08B7/06 , G08B17/10 , G08B17/12 , G08B25/14 , G08B25/10 , A62C37/11 , G06T7/593 , H04W4/024 , H04W4/02 , H04W4/33 , H04W4/80 , H04W4/90
Abstract: The invention relates to an intelligent evacuation system and method used in a subway station fire. A fire alarm module discovers a fire and transmits fire information, a fire source positioning module positions a fire source according to the collected picture information and smoke information of the fire, an indoor pedestrian positioning module positions pedestrians in a subway station; a relay control module is connected with the fire alarm module, the fire source positioning module and the indoor pedestrian positioning module, and the relay control module combines fire information, fire source positioning information and pedestrian positioning information; and a master control module is connected with the relay control module, and the master control module plans a dynamic escape route for each pedestrian according to the combined information, pedestrian information collected by a subway APP and pedestrian information collected by a map management system, and generates an escape route guide map.
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公开(公告)号：US20210050836A1
公开(公告)日：2021-02-18
申请号：US16978950
申请日：2019-05-05
Inventor： Da CHEN , Hongfei WANG , Peng WANG , Xiaojun ZHANG , Zhongli LI
IPC: H03H3/02 , H01L41/08 , H01L41/27 , H01L41/314 , H01L41/332
Abstract: Disclosed is a method of manufacturing a piezoelectric thin film resonator on a non-silicon substrate, including the following steps: depositing a copper thin film on a silicon wafer; coating photoresist on the copper thin film to perform photoetching so as to remove photoresist in an air gap region under the piezoelectric thin film resonator to be disposed; electroplating-depositing a copper layer, and removing photoresist to obtain a stepped peel sacrifice layer; coating polyimide and performing imidization by heat treatment, making a sandwich structure of the piezoelectric thin film resonator above the polyimide layer; performing etching for the polyimide layer in a region not covered by the piezoelectric thin film resonator by oxygen plasma; placing the obtained device into a copper corrosion solution to dissolve the copper around and under the piezoelectric thin film resonator, attaching a drum coated with polyvinyl alcohol glue onto the piezoelectric thin film resonator, releasing and peeling it from the silicon wafer and then transferring it to a desired non-silicon substrate; washing the drum with hot water to separate the drum from the piezoelectric thin film resonator so as to complete the manufacturing process.
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80.发明申请公开(公告)号：US20210018315A1
公开(公告)日：2021-01-21
申请号：US17043778
申请日：2019-05-14
Inventor： Yunliang TAN , Kai ZHOU , Fenghai YU , Tongbin ZHAO
Abstract: An anchor bolt length determination method based on monitoring of a roof rock stratum horizontal extrusion force includes drilling a borehole in the middle of a roadway roof to determine a surrounding rock fracturing scope by a borehole television. The method includes selecting the number and locations of horizontal extrusion force measuring points according to the surrounding rock fracturing scope. The method includes monitoring and recording a change of the horizontal extrusion force over time in the borehole by a device for monitoring a roof rock stratum horizontal extrusion force. The method includes selecting a location with the largest horizontal extrusion force as a center of a anchoring segment of an anchor bolt to determine a distance between the anchoring center and the roof. The method includes calculating a total length of the anchor bolt.
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