Abstract: A beam-column joint of a concrete precast column and a construction method thereof, including: obtaining a hoop plate, in which an inner side of the hoop plate is provided with studs; welding a circumferential reinforcing plate in the hoop plate; arranging longitudinal bars and stirrups for bundling the longitudinal bars; pouring the upper precast column and the lower precast column with the circumferential reinforcing plates in the two hoop plates as the boundary support formwork; welding the hoop plate of the upper precast column with the hoop plate of the lower precast column; arranging a horizontal beam at the hoop plate, and connect the horizontal beam with the hoop plate. The upper precast column and the lower precast column are connected by welding hoop plate; the hoop plate is used to connect the precast column and the horizontal beam.

Abstract: An anti-spoofing satellite navigation and positioning method includes: receiving a positioning satellite radio frequency (RF) signal by a satellite RF receiving module, and detecting whether a power strength of the received signal exceeds a preset threshold; preprocessing the received signal by a satellite RF signal identification module, and intercepting an identifiable positioning satellite signal for identification to distinguish a real signal and a false signal; calculating the received signal to acquire real position and time information when the received signal is identified as the real signal; and sending an alarm message when the received signal is identified as the false signal. An anti-spoofing satellite navigation and positioning chip is further provided. By identifying whether the signal is a real signal or a false signal, the authenticity of the upper-layer position calculation is ensured, and the purpose of timely and accurate detection and effective resistance to spoofing attacks is achieved.

Abstract: The present application relates to a prefabricated concrete beam-column node and a construction method thereof. The construction method of the prefabricated concrete beam-column node includes: assembling node connectors, and mounting studs on each node connector; welding a circumferential reinforcing plate with a groove hole in the center to a middle-rear section of each node connector; mounting a longitudinal rebar on each circumferential reinforcing plate; pouring a concrete beam between two circumferential reinforcing plates; welding a hidden corbel to a side flange of each of structural columns; hoisting the concrete beam, and overlapping each node connector with the corresponding hidden corbel; welding each node connector to the corresponding structural column; and pouring the concrete beam between the circumferential reinforcing plates and the structural columns.

Abstract: The present disclosure provides an epoxidized natural rubber composite and a preparation process thereof, and relates to the technical field of rubber materials. The epoxidized natural rubber composite provided by the present disclosure comprises the following preparation raw materials in parts by weight: 100 parts of epoxidized natural rubber, 1˜30 parts of peanut meal, 0.05˜0.8 parts of surfactants, 0.1˜4 parts of coagulant and 0.2˜12 parts of vulcanization processing aids. The present disclosure utilizes essential amino acids and non-essential amino acids contained in peanut meal to improve the aging resistance of the epoxidized natural rubber. After hot air aging, ozone aging and ultraviolet aging treatments, both the tensile strength retention rate and the elongation at break retention rate of the epoxidized natural rubber composites of the present disclosure can be kept above 83%.

Abstract: A recyclable pile foundation is provided. The recyclable pile foundation includes several inner cylinders, several outer cylinders and several reciprocating components which are circumferentially distributed between the inner cylinders and the outer cylinders. Each reciprocating component includes several steel collars, a push-pull rod, a hold component and at least one motion component. The motion components are distributed along the push-pull rod. Each motion component includes at least one triangular connection plate, several connection rods, an inner wedge block, an outer wedge block, a motion block and a pointed rod. When the push-pull rod is pushed along its own axis to the pushed position, the pointed rod protrudes from the outer cylinders to increases the friction between the surrounding soil and the recyclable pile foundation. When the push-poll rod is pulled along its own axis to the pulled position, the pointed rods retract back into the outer cylinders.

Abstract: Disclosed is an automatic row-guiding method for maize combine harvester based on the situation of missing plants, comprising: S1, guiding calculation of missing plants according to a traveling speed of a harvester and output values of left and right detecting sensors; and S2, performing guiding calculation of missing plants if there is a situation of missing plant, obtaining a first target turning angle of an electric steering wheel; or obtaining a second target turning angle according to the output values of the left and right detecting sensors if there is no situation of missing plant, then adjusting the steering wheel in terms of controlling direction, and finally, realizing automatic row-guiding of the combine harvester.

Abstract: Disclosed is a marine communication buoy. The marine communication buoy includes s a round seat, side slots and hollow boxes, four side slots are uniformly distributed outside the round seat, and each side slot is connected with the hollow box in a sliding way. The marine communication buoy also includes sealing rings and buckle covers, an outer part of each hollow box is provided with a sealing ring, an outer end of each hollow box is slidably connected with the buckle cover, and an inner side of the buckle cover is in contact with the sealing ring. The marine communication buoy also includes valves and connector pipes, the connector pipe is arranged at an outer side of each buckle cover, and the connector pipe is provided with the valve.

Abstract: Disclosed is an automatic row-guiding method for maize combine harvester based on the situation of missing plants, comprising: S1, guiding calculation of missing plants according to a traveling speed of a harvester and output values of left and right detecting sensors; and S2, performing guiding calculation of missing plants if there is a situation of missing plant, obtaining a first target turning angle of an electric steering wheel; or obtaining a second target turning angle according to the output values of the left and right detecting sensors if there is no situation of missing plant, then adjusting the steering wheel in terms of controlling direction, and finally, realizing automatic row-guiding of the combine harvester.

Abstract: The present invention relates to the technical field of endoscopes, and discloses a confocal endoscope with a fixing device.

Abstract: The present application relates to a prefabricated concrete beam-column node and a construction method thereof. The construction method of the prefabricated concrete beam-column node includes: assembling node connectors, and mounting studs on each node connector; welding a circumferential reinforcing plate with a groove hole in the center to a middle-rear section of each node connector; mounting a longitudinal rebar on each circumferential reinforcing plate; pouring a concrete beam between two circumferential reinforcing plates; welding a hidden corbel to a side flange of each of structural columns; hoisting the concrete beam, and overlapping each node connector with the corresponding hidden corbel; welding each node connector to the corresponding structural column; and pouring the concrete beam between the circumferential reinforcing plates and the structural columns.

Abstract: A storage device for data encryption and self-destruction includes a controller, an interface module, a storage module, an encryption and authentication module, a positioning module, a power supply module, and a communication and self-destruction module. The interface module, the storage module, the encryption and authentication module, the positioning module and the communication and self-destruction module are electrically connected to the controller, respectively. The encryption and authentication module is configured to encrypt and protect data stored in the storage module, and authenticate a request for remote access to the storage device. The communication and self-destruction module is configured to send position information acquired by the positioning module to a storage device management system, receive and execute a data destruction instruction issued by the storage device management system, and destruct the data stored in the storage module.

Abstract: An anti-spoofing satellite navigation and positioning method includes: receiving a positioning satellite radio frequency (RF) signal by a satellite RF receiving module, and detecting whether a power strength of the received signal exceeds a preset threshold; preprocessing the received signal by a satellite RF signal identification module, and intercepting an identifiable positioning satellite signal for identification to distinguish a real signal and a false signal; calculating the received signal to acquire real position and time information when the received signal is identified as the real signal; and sending an alarm message when the received signal is identified as the false signal. An anti-spoofing satellite navigation and positioning chip is further provided. By identifying whether the signal is a real signal or a false signal, the authenticity of the upper-layer position calculation is ensured, and the purpose of timely and accurate detection and effective resistance to spoofing attacks is achieved.

Abstract: The present disclosure provides an epoxidized natural rubber composite and a preparation process thereof, and relates to the technical field of rubber materials. The epoxidized natural rubber composite provided by the present disclosure comprises the following preparation raw materials in parts by weight: 100 parts of epoxidized natural rubber, 1˜30 parts of peanut meal, 0.05˜0.8 parts of surfactants, 0.1˜4 parts of coagulant and 0.2˜12 parts of vulcanization processing aids. The present disclosure utilizes essential amino acids and non-essential amino acids contained in peanut meal to improve the aging resistance of the epoxidized natural rubber. After hot air aging, ozone aging and ultraviolet aging treatments, both the tensile strength retention rate and the elongation at break retention rate of the epoxidized natural rubber composites of the present disclosure can be kept above 83%.

Abstract: The present invention pertains to fields of biochemistry and molecular biology, relates to an ?O-superfamily conotoxin peptide, pharmaceutical composition thereof, preparation method and use thereof. The present invention further relates to a propeptide of the conotoxin peptide, nucleic acid construct thereof, expression vector and transformed cell thereof, and fusion protein thereof. The present invention further relates to a method for blocking acetylcholine receptors as well as a use of the conotoxin peptide in the manufacture of a medicament. The new ?O-superfamily conotoxin peptide of the present invention is capable of specifically blocking acetylcholine receptor (nAChRs) (e.g., ?9?10 nAChR), and NMDA receptor (e.g.

Abstract: The present invention provides a novel ?-conotoxin peptide, pharmaceutical composition and use thereof. The present invention further provides a propeptide of the conotoxin peptide, a nucleic acid construct, expression vector and transformed cell of the conotoxin peptide as well as a fused protein of the conotoxin peptide. The present invention discloses a method for blocking acetylcholine receptors as well as a use of the conotoxin peptide in the manufacture of a medicament. The ?-conotoxin peptide of the present invention can specifically block acetylcholine receptor (nAChRs, such as ?3?2 nAChRs, ?6/?3?2?3 nAChR or ?3?4 nAChR or ?6/?3?4 nAChR), has activity for treatment of neuralgia, addiction, Parkinson's disease, dementia, schizophrenia, cancers, and can be used in the manufacture of a medicament for analgesia and smoking cessation and drug-withdrawal, a medicament for treatment of mental diseases and cancers, as well as a tool drug for neurosciences.

Abstract: The present invention provides a novel ?-conotoxin peptide, pharmaceutical composition and use thereof. The present invention further provides a propeptide of the conotoxin peptide, a nucleic acid construct, expression vector and transformed cell of the conotoxin peptide as well as a fused protein of the conotoxin peptide. The present invention discloses a method for blocking acetylcholine receptors as well as a use of the conotoxin peptide in the manufacture of a medicament. The ?-conotoxin peptide of the present invention can specifically block acetylcholine receptor (nAChRs, such as ?3?2 nAChRs, ?6/?3?2?3 nAChR or ?3?4 nAChR or ?6/?3?4 nAChR), has activity for treatment of neuralgia, addiction, Parkinson's disease, dementia, schizophrenia, cancers, and can be used in the manufacture of a medicament for analgesia and smoking cessation and drug-withdrawal, a medicament for treatment of mental diseases and cancers, as well as a tool drug for neurosciences.