Abstract: The utility model relates to a grounded shrapnel structure of an H-MTD male connector, including a housing of a hollow structure, a shrapnel in an arch shape, and a guide block. The front end of the housing is provided with an opening. The guide block is arranged horizontally. One end of the guide block is connected to one end of the opening. The other end of the guide block is connected to one end of the shrapnel. The structure uses only two surfaces at top and bottom that are grounded, thereby reducing the number of openings, improving the strength of a sidewall, and enhancing the shielding effect. In addition, the guide block can play the function of anti-scratching during assembly, which can effectively avoid the damage to the shrapnel during assembly and improve yield.

Abstract: A control method of a mechanical arm, a mechanical arm assembly, and a readable storage medium. The mechanical arm includes a parallel platform which includes a movable platform, a static platform and a telescopic element connecting the movable platform and the static platform, and the method includes: acquiring a current pose of the movable platform in a mechanical coordinate system, wherein the mechanical coordinate system is a global coordinate system of the mechanical arm where the movable platform is located; acquiring, according to the current pose of the movable platform, a target pose of a static platform in the mechanical coordinate system; performing pose transformation on the static platform according to the current pose of the movable platform and the target pose of the static platform.

Abstract: The utility model relates to a ring-shaped shrapnel structure of an H-MTD male connector, including a housing, a ring-shaped sheet, and a shrapnel. The housing is a stepped hollow structure. The ring-shaped sheet is connected to the front end of the housing. The shrapnel in an arch-shape protrudes and is arranged on the ring-shaped sheet. The structure uses a split design to separate the shrapnel from the housing, thereby reducing production difficulties and improving yields, while complementing the shielding effect of the connector.

Abstract: A uracil compound containing a carboxylate fragment, a preparation method therefor, and a herbicidal composition and use thereof are provided. The preparation method includes a contact reaction between a carboxylic acid compound and different substituted alcohol, halogenated, or sulfonate compound in a presence of a solvent. The uracil compound containing a carboxylate fragment provided by the present invention has better herbicidal activity compared with the prior art.

Abstract: A hybrid master-slave mapping method includes the following steps: acquiring a current position and a target position of an end point of a robotic arm; decomposing a displacement from the current position to the target position into a vertical direction and a horizontal plane to obtain a vertical displacement position and a horizontal displacement position; determining a first control amount of a multi-degree-of-freedom parallel platform according to the vertical displacement position, and determining a second control amount of a passive arm according to the horizontal displacement position; controlling the multi-degree-of-freedom parallel platform according to the first control amount, and controlling the passive arm according to the second control amount.

Abstract: Disclosed are a master-slave mapping method for parallel platform, and a robotic arm system and a storage medium. The method comprises: acquiring a first transformation relationship between a user coordinate system and a calculation coordinate system; mapping displacement amounts of an end of a master manipulator in a master user coordinate system to an end of the movable platform according to a set proportional coefficient, to obtain a first target position of the end of the movable platform; determining a second target position of the end of the movable platform according to the first transformation relationship and the first target position; obtaining a movement amount of each of the telescopic rods of the parallel platform according to the second target position, and controlling a motion of the parallel platform according to the movement amount of each of the telescopic rods. The control of the robotic arm is simplified.

Abstract: A control method for a surgical robotic arm, a computer device and a surgical robotic arm are provided. The control method includes calculating a telecentric fixed point on an executing rod according to a target point and controlling a preoperative positioning assembly to advance a first movable platform of a telecentric manipulating assembly along a first coordinate axis of a movable coordinate system; calculating a first origin coordinate of an origin of the first movable platform in a stationary coordinate system according to the coordinate of the telecentric fixed point and the trajectory coordinate of an end point; calculating the length of a first telescopic element of the telecentric manipulating assembly according to the coordinates of a hinge point of the telecentric manipulating assembly in the stationary coordinate system; and controlling the first movable platform to move to a designated pose.

Abstract: A surgical robotic arm (100) includes a presurgical positioning assembly (10), a telecentric manipulating assembly (20) and an executing assembly (30); the telecentric manipulating assembly (20) includes a static platform (21), a first movable platform (22) and a plurality of first telescopic elements (23) disposed between the static platform (21) and the first movable platform (22); the executing assembly (30) has a preset telecentric fixed point; coordinated extension and retraction among the plurality of first telescopic elements (23) is capable of controlling the first movable platform (22) to move relative to the static platform (21) and drive the executing assembly (30) to extend and retract and swing; a swing center of the executing assembly (30) is the telecentric fixed point; and a telescopic path of the executing assembly (30) passes through the telecentric fixed point.

Abstract: The present disclosure provides a single-degree-of-freedom (SDOF) magnetic damping shock absorber based on an eddy current effect, comprising a lower plate, a ring-shaped magnet a, a ring-shaped magnet b, an aluminum cylinder, a bottom copper sheet, a copper sheet, a top copper sheet, a bearing seat, a linear bearing, a bearing end cap, a load, a piston shaft, a stepped shaft, a fixed collar, a coil spring, a lower clamping shaft, and fixing screws. When the shock absorber is working, the ring-shaped magnet a keeps stationary at the lower end and the ring-shaped magnet b reciprocates in the vertical direction. Both magnets are arranged in a mutual attraction manner. Under the action of a time-varying electromagnetic field generated by the relative movement of the ring-shaped magnet b, the copper sheet arranged between the two ring-shaped magnets generates eddy current damping. The movement of the ring-shaped magnet b is inhibited.

Abstract: The present invention discloses a quasi-zero-stiffness (QZS) based six-degree-of-freedom (6-DOF) absolute displacement and attitude measurement device. A lower end coil and an upper end coil are respectively charged with currents in the opposite directions; The electromagnetic field and the magnetic fields of an upper magnet and a lower magnet per se are mutually acted to produce an electromagnetic stiffness opposite to the stiffness of a spring. The stiffness of the whole leg is close to zero stiffness. When the to-be-measured platform generates space motion, the reference platform is in the stationary state. At this point, the deformation amounts of the six legs can be measured by laser displacement sensors. The six deformation amounts are respectively inputted into the displacement and attitude resolver, and by forward kinematic solution of the 6-DOF device, the displacement and the attitude of the to-be-measured platform can be obtained.

Abstract: The present disclosure provides a single-degree-of-freedom (SDOF) magnetic damping shock absorber based on an eddy current effect, comprising a lower plate, a ring-shaped magnet a, a ring-shaped magnet b, an aluminum cylinder, a bottom copper sheet, a copper sheet, a top copper sheet, a bearing seat, a linear bearing, a bearing end cap, a load, a piston shaft, a stepped shaft, a fixed collar, a coil spring, a lower clamping shaft, and fixing screws. When the shock absorber is working, the ring-shaped magnet a keeps stationary at the lower end and the ring-shaped magnet b reciprocates in the vertical direction. Both magnets are arranged in a mutual attraction manner. Under the action of a time-varying electromagnetic field generated by the relative movement of the ring-shaped magnet b, the copper sheet arranged between the two ring-shaped magnets generates eddy current damping. The movement of the ring-shaped magnet b is inhibited.

Abstract: The present invention relates to a compound having a benzo seven-membered ring structure, and a preparation method therefor, and use thereof. The compound has a structure as represented by formula (I). Provided is use of the compound having the structure and prepared with the preparation method of the present invention, enantiomers, diastereomers, racemates and mixtures thereof of the compound, as well as chemically acceptable salts, crystalline hydrates and solvent mixtures of the compound and the enantiomers, diastereomers, racemates and mixtures thereof of the compound in the preparation of drugs for treating BET Bromodomain BRD4 activity or expression level related diseases.

Abstract: The present disclosure provides a data sharing method for a terminal, a data sharing apparatus and the terminal including a plurality of systems. The method includes: setting a data channel for communication between each two systems among the systems; when data needs to be shared between any two systems among the systems, performing a security detection on data to be shared through a data channel between the any two systems, to determine whether the data to be shared is security data; sharing the data to be shared through the data channel if the data to be shared is the security data, or prohibiting sharing the data to be shared if the data to be shared is not the security data. The present disclosure can realize communication between a security system and an ordinary system under the premise of ensuring that data in the security system has higher security.

Abstract: A wood screw includes a shank, a head connected thereto, a drilling portion opposite to the head, a plurality of threads spirally disposed on the shank and the drilling portion, and at least two first ribs extending on the drilling portion between two adjacent thread convolutions of the threads. The first ribs extend in a direction different from a screwing direction. Each first rib has two first surfaces protruding from the shank and converging at a first edge. The first edges of the first ribs are orientated in the screwing direction. Accordingly, the first ribs assist the drilling portion in enlarging a cutting area to increase the cutting effect and reduce the screwing resistance derived from the screwing operation. The first ribs and the thread convolution cooperate to form three cutting points in cross section, thereby achieving a stable, speedy and effort-saving screwing effect.

Abstract: The present disclosure provides a data sharing method for a terminal, a data sharing apparatus and the terminal including a plurality of systems. The data sharing method includes: setting a data channel for communication between each two systems among the systems; when data needs to be shared between any two systems among the systems, performing a security detection on data to be shared through a data channel between the any two systems, to determine whether the data to be shared is security data; sharing the data to be shared through the data channel if the data to be shared is the security data, or prohibiting sharing the data to be shared if the data to be shared is not the security data. The present disclosure can realize communication between a security system and an ordinary system under the premise of ensuring that data in the security system has higher security.

Abstract: A fast battery charger in which each one of the battery charging sections comprises a charging branch and a bypassing branch, the battery charger is provided with enhanced charging monitory and control circuitry and method for performance elevation with minimal additional hardware overhead.

Abstract: A fast battery charger in which each one of the battery charging sections comprises a charging branch and a bypassing branch, the battery charger is provided with enhanced charging monitory and control circuitry and method for performance elevation with minimal additional hardware overhead.

Abstract: A battery charger including a plurality of battery charging sections which are connected in series and a charging current source, said charging section includes at least a first branch and a second branch which are connected in parallel, said first parallel branch includes an electronically controllable bypassing switch, said second parallel branch includes terminals for receiving the positive and negative terminals of a battery and a one-way electronic device which are connected in series, said bypassing switch has a very low impedance when activated or turned-on and a very high impedance when deactivated or turned-off, wherein said one-way electronic device is characterised by a very low-impedance when current flows from said charging section into said battery terminals and a high-impedance when said bypassing switch is activated, the battery in the charging section in which said bypassing switch is activated is substantially isolated electrically from the charging current, the other charging sections and t

Abstract: A battery charger including a plurality of battery charging sections which are connected in series and a charging current source, said charging section includes at least a first branch and a second branch which are connected in parallel, said first parallel branch includes an electronically controllable bypassing switch, said second parallel branch includes terminals for receiving the positive and negative terminals of a battery and a one-way electronic device which are connected in series, said bypassing switch has a very low impedance when activated or turned-on and a very high impedance when deactivated or turned-off, wherein said one-way electronic device is characterised by a very low-impedance when current flows from said charging section into said battery terminals and a high-impedance when said bypassing switch is activated, the battery in the charging section in which said bypassing switch is activated is substantially isolated electrically from the charging current, the other charging sections and t

Abstract: A serial battery charger including a number of serially connected battery charging sections in which the battery charging section is characterized by a first and second parallelly connected branches. The first branch includes terminals for connecting to the battery to be charged and a current blocking device and the second branch includes a by-passing switch which shunts across the terminals of the first branch when activated. The blocking device in the first branch prevents adverse reverse current flow from the battery to the charger when there is no power supply and also functions as a current block to prevent adverse flow of current from the battery into the shunting by-passing switch when the power supply to the charging section is in operation. This invention provides a simple solution to fulfil the conflicting requirements of an intelligent serial battery charger.