5results about How to "Effectively hide" patented technology

The invention discloses a multi-user covert communication method based on time slot allocation and 3D trajectory optimization. The method comprises the following steps: S1, constructing a communication system for serving multiple users by an unmanned aerial vehicle base station; s2, establishing an optimization problem for maximizing the average concealment rate by jointly optimizing user service time slot allocation, a sender beam forming vector and a 3D flight trajectory; s3, dividing the optimization problem into a user service time slot allocation sub-problem, a beam forming vector sub-problem and a 3D flight path optimization sub-problem; s4, solving an alternate user service time slot allocation sub-problem, a beam forming vector sub-problem and a 3D flight path optimization sub-problem through an alternate optimization algorithm to obtain a communication strategy including optimal user service time slot allocation, beam forming vector and 3D flight path; and S5, guiding the communication system to realize multi-user covert communication through the communication strategy. According to the invention, the security, concealment and reliability of multi-user covert communication are improved through the unmanned aerial vehicle base station.

This utility model relates to a wood grain-look glass panel, belonging to the field of display screen glass technology. To solve the problems of light leakage and difficulty in concealing the viewing window border in existing displays, a wood grain-look glass panel is provided. The glass panel includes a glass substrate, which has a viewing window area and a shielding area. One side surface of the glass substrate is covered with a wood grain-look ink layer. The area of ​​the glass substrate corresponding to the shielding area is covered with a black ink border shielding layer. The surface of the wood grain-look ink layer is covered with a varnish layer, and the surface of the varnish layer is covered with a semi-transparent black ink layer. The black ink border shielding layer is printed on the surface of the black ink layer, and an opaque black ink overlay is printed on the surface of the black ink border shielding layer. This achieves a smooth color transition, ensuring the uniformity of the formed ink layer, thereby effectively concealing the black border at the boundary of the viewing window area.

This utility model discloses a smart blackboard adjustment component, including a display screen, blackboard bodies on both sides of the display screen, a control board at the bottom of the display screen, a button fixedly connected to one side of the front end of the control board, rounded corners around the display screen, and a protective mechanism fixedly connected to the rear end of the display screen. An antenna mechanism is detachably connected inside the protective mechanism. The protective mechanism effectively protects the device, preventing damage to the exposed structure. The concealed shell is not only aesthetically pleasing but also effectively hides the internal components, reducing the impact of external factors on the device. The antenna mechanism allows the device to better receive wireless signals, improving communication quality and stability. The lower end of the shell is movably connected to the bottom wall of the mounting groove, allowing the antenna mechanism to be adjusted as needed to achieve optimal signal reception.

This utility model provides an automatic slag removal CNC machining center, including a base. A machining spindle, front and rear rails, and left and right rails that move along the front and rear rails are mounted on the top surface of the base, as well as a worktable that moves along the left and right rails. Two material troughs are recessed on each of the left and right sides of the base. Several water spray heads are installed at the front end of each trough, and a discharge port is opened at the rear end. The water spray heads are positioned towards the discharge port and connected to an external water source, spraying water into the material troughs. The design of the material troughs allows waste material to fall from the worktable into the recessed troughs during machining, increasing the storage space for waste material. The operator can then control the water spray heads to flush the waste material into the discharge port, reducing waste accumulation in the machining area.

The utility model relates to polyurethane heat preservation board technical field discloses a hidden fireproof polyurethane heat preservation board, including polyurethane board, the side of polyurethane board is sleeved and is installed the first plug -in iron box of one side is open, the side of polyurethane board away from the first plug -in iron box is sleeved and is installed the second clamping iron box of one side is open, the first plug -in iron box between second clamping iron box has the docking structure, the first plug -in iron box and second clamping iron box between being provided with clamping part, in the utility model, polyurethane board nests in the first plug -in iron box and second clamping iron box, can carry out fire prevention through the first plug -in iron box and second clamping iron box, avoid the erosion of the fire adhesion on the surface of rigid polyurethane board to it to through the first plug -in iron box and second clamping iron box protection polyurethane board, simultaneously, still can have good heat preservation function while having the fire -proof function, makes polyurethane board hide in the first plug -in iron box and second clamping iron box.