6results about How to "Avoid direction shift" patented technology

This application discloses a method, apparatus, device, and storage medium for generating perturbation samples based on finite mean value curvature estimation sampling, relating to the field of model security assessment technology. The method includes: acquiring original image samples and corresponding ground truth labels; sampling within the neighborhood of the original image samples to obtain local sampling points; updating the curvature of each local sampling point and the original image samples using finite mean value estimation to obtain adversarial image samples; and determining target perturbation samples based on the original image samples, the ground truth labels, and the adversarial image samples. This application guides sample updates through finite mean value curvature estimation, enabling the capture of nonlinear curvature information of lost terrain, improving the accuracy of perturbation direction, thereby generating adversarial samples with smaller perturbation amplitudes, and enhancing the accuracy and efficiency of model security assessment.

The utility model belongs to adhesive tape processing technical field discloses a slitting equipment, the existing slitting equipment can cut the adhesive tape roll into different length, but the prior art needs manual regulation position of adhesive tape roll when using, and there is inconvenient to use, the utility model example's technical scheme, including base, the top surface fixed mounting of base has the mounting bracket, the even distribution's transmission shaft that a few rotate and install on the mounting bracket, transmission shaft is arranged obliquely, one side of mounting bracket is provided with the abutment plate, be provided with the adjusting device that moves the abutment plate on the mounting bracket, the fixed mounting of mounting bracket has the fixed frame, the fixed frame is provided with the compression device that can carry out the compression of adhesive tape roll, sets up the sawtooth between transmission shaft and abutment plate, the utility model sets up the transmission shaft that is arranged obliquely, makes the adhesive tape roll under the action of gravity, can realize automatic feeding, secondly through the cooperation of compression device and abutment plate, it is convenient to adjust the cutting length of adhesive tape roll and realizes the discharge of cutting adhesive tape roll, and it is convenient to use.

The utility model relates to the field of laser equipment, and discloses a protection type handheld laser marking machine which comprises a main machine and a marking machine head, the main machine is in signal connection with the marking machine head through a transmission line, a protection mechanism is arranged on the lower portion of the marking machine head and comprises a protection frame, the lower surface of the protection frame is fixedly connected with a contact piece, and the contact piece is connected with the main machine. A mounting frame is fixedly connected to the outer wall of the protection frame, an air pressure block is fixedly connected to the inner wall of the mounting frame, a piston plate is connected to the inner wall of the air pressure block in a piston mode, vent holes are formed in the inner wall of the piston plate, and a connecting rod is fixedly connected to the end, away from the marking machine head, of the piston plate. According to the utility model, through the arrangement of the protection mechanism, the impact force of an external object can be effectively buffered when the external object impacts towards the direction of the marking machine head, and the rear baffle plate does not move back and forth, so that the effect of preventing the marking machine head from deviating and causing danger due to the impact of the external object is achieved.

The utility model provides a sign board convenient to disassemble and assemble, and relates to the technical field of industrial design and identification. A groove; the sign board is fixedly mounted on one side of the sign board, and a handheld hole is formed in one side of the surface of the front end of the sign board; and the fixing device is arranged behind the sign board in an attached mode and used for fixing the sign board. The fixing device is arranged, the base, the spring A, the sliding rod, the clamping groove, the rubber block and the handle are used in cooperation, the sliding rod is pulled, rapid fixing of the signboard is achieved, damage to an installation carrier and the signboard in traditional binding and welding modes and the like is avoided, the disassembly and assembly efficiency is remarkably improved, repeated utilization is achieved, and the practicability is high. Meanwhile, through the arrangement of the handle, the indication board can be conveniently driven to move, the device can be conveniently fixed to the wall surface through the cooperation of the external hook and the handle, the vertical installation display requirement is met, the use scene is greatly expanded, and the practicability of the indication board is further improved.

The utility model discloses a kind of porcelain push rod clamping equipment, it is related to porcelain push rod clamping technical field, the porcelain push rod clamping equipment, including mounting seat, the lower end of mounting seat is provided with clamping assembly, the upper surface of mounting seat is provided with moving groove, and one side of the moving groove is provided with adjusting assembly, the adjusting assembly includes adjusting plate, hinge is arranged at the junction of adjusting plate and mounting seat, and adjusting plate is rotatably connected with mounting seat by hinge, the upper surface of adjusting plate is provided with limit sliding slot, the both sides of limit sliding slot bottom end are provided with adjusting groove, and adjusting groove transversely penetrates adjusting plate, the scheme has solved the problem that most of existing clamping equipment is single clamping, processing efficiency is low, when clamping multiple porcelain push rod, porcelain push rod needs to be installed and disassembled independently multiple times, leading to installation and disassembly time-consuming and laborious, poor flexibility.

This invention provides a device for assisting in the precise and rapid placement of distal tibiofibular screws, relating to the field of medical devices. Its features include: a steel plate with multiple threaded holes; a sleeve mounted on the steel plate, the sleeve matching the threaded holes; a hollow tube on one side of the sleeve; a telescopic mechanism between the sleeve and the hollow tube; a fixing mechanism connecting the telescopic mechanism and the hollow tube; a measuring mechanism rotatably mounted on the hollow tube; and the telescopic mechanism including a first telescopic rod, one end of which is fixedly connected to the sleeve. The advantages of this invention are: by providing stable bone surface fixation, precise placement path guidance, a quickly adjustable and locking telescopic structure, reliable angle fixation, and real-time intraoperative depth and angle monitoring, it significantly improves the accuracy, repeatability, and surgical efficiency of distal tibiofibular screw placement, while reducing the risk of complications.