32results about How to "Control disturbance" patented technology

The invention provides a vector map integrity authentication method for tampered primitive set positioning. The method comprises steps of primitive vertex classification, adaptive primitive set division based on a simulated annealing method, authentication watermark generation, authentication watermark embedding, primitive marking, watermark authentication, and non-destructive original data restoration. With the simulated annealing method, vector map primitives are divided into different groups adaptively. On the premise that the precision error tolerance of the vector map is considered, watermark authentication and primitive set information embedding are realized by using a reversible information hiding method, so that the tampered primitive can be localized accurately, the invisibility is high, and no extra storage space is needed. In addition, with the vector map integrity authentication method, at the watermark authentication stage, the tampered primitive set can be localized accurately, the original vector map data can be restored in a non-destructive manner after watermark authentication to guarantee reliable application of the vector map data.

The invention provides a mark based vector map completeness authentication method. The method comprises the following steps: identifying vertex coordinates of an embeddable watermark; adaptively dividing map element groups; generating an authentication watermark; embedding the authentication watermark; marking map elements; and performing watermark authentication and original data lossless restoration. According to the method, the map elements of a vector map are adaptively divided into different groups, the authentication watermark is embedded with a reversible information hiding method on the premise of considering a precision error margin of the vector map, and based on a vertex insertion method, a mark is added into each map element to indicate the map element group that the map element belongs to, so that correct division of the map element groups in a watermark authentication stage is ensured, the invisibility is relatively high while the map elements are accurately positioned and tampered, and the map element disordering and the vertex reversed attack can be tolerated; and in addition, through an algorithm, in the watermark authentication stage, the marks are removed, the authentication watermark is extracted, and original data of the vector map are losslessly restored, so that accurate use of vector map data can be effectively ensured.

The invention discloses a mud pump damming integrated machine. The mud pump damming integrated machine comprises an axle, an earth material storage container, an earth material conveying system, an earth material vibrating screen, a mud production device and a mud conveying pump; the earth material storage container, the earth material conveying system, the earth material vibrating screen, the mud production device and the mud conveying pump are arranged on the axle; one end of the lower portion of the earth material storage container is provided with an earth material breaking mechanism; the earth material conveying system is located under the earth material storage container; the earth material vibrating screen is located under the earth material conveying system; the mud production device is located under the earth material vibrating screen; earth materials and water which is supplied by a water supply system are mixed into mud through the mud production device; the water supply system is arranged on the lower portion of the mud production device and is communicated with the mud production device; the mud conveying pump is located in front of the mud production device and is communicated with the mud production device. According to the mud pump damming integrated machine, the problems that the water drop damming dam site selection is limited, the mud concentration cannot be controlled, the quality of a dam body is non-uniform, geological disasters such as landslides are easy to cause, working conditions of the operating personnel are poor, the labor intensity is large, and the security is difficult to guarantee are solved, the mechanization and the automation of check dam construction are achieved, and the construction quality and efficiency is improved.

Disclosed is a multi-tunnel construction method based on weak interlayers, the method comprising the following steps: measuring the position of weak interlayers, uniformly distributing conduits in the weak interlayers, grouting the weak interlayers via the conduits to form a grouting area, A number of tunnels to be constructed are evenly distributed on both sides of the weak interlayer, and the geotechnical parameters of the tunnels are measured. Blast holes are evenly distributed in the core area, and blast holes and energy-absorbing holes are arranged in the buffer zone. The holes are surrounded by the energy-absorbing holes, and the non-adjacent tunnels continue to be continuously blasted in a predetermined order until all the tunnels are blasted. slurry, reduce the number of blast holes and / or reduce the amount of explosives in the blast holes, non-adjacent tunnels are blasted continuously in a predetermined order and make the displacement change of surrounding rock and / or the change of surface settlement less than the predetermined threshold.

A hydraulic system of shield spiral conveying machine with ratio feedback control and energy storing device for oil supplement consists of a three-position and four-way solenoid change valve, a motor, a rotation sensor, a one-way valve, a liquid-controlled one-way valve, a throttle valve, a two-position and two-way solenoid reversal valve, a shift sensor, a hydraulic cylinder, a range switch, a stop ball valve, a unloading valve, an overflow valve and an energy storing device. The machine has a sensor to monitor rotation and makes variable pump controlled according soil cabin pressure so as to control soil discharge volume and to achieve a hydraulic control system of a continuous real time controllable spiral-conveying machine. The energy-storing device is used oil supplement to close exhaust outlet reliably when accident occurs to guarantee safety for tunnel engineering. The electric feedback and ratio feedback are used to control turbulence to soil body when shield tunneling and reduce settlement of earth surface. The machine can be adaptable for various strata reliably.

The invention provides a vector map integrity authentication method for positioning a tampered area. The method comprises the steps of classifying primitive vertexes, dividing data units based on the simulated annealing method, associating the primitive vertexes with the data units, constructing the positioning information, generating an authentication watermark, embedding the positioning information and the authentication watermark, marking primitives, conducting the watermark authentication and positioning the tampered area. According to the technical scheme of the invention, based on the simulated annealing method, the primitives of a vector map are divided into different data units, and a mark is added into each primitive for indicating the data unit of the above primitive. An associated data unit is assigned to each data unit and then the positioning information is constructed. Meanwhile, according to the quantization-based information hiding method, the embedding of the authentication watermark and the embedding of the positioning information in the associated data unit are realized. As a result, a tampered data unit and the original area thereof are accurately positioned, and the reliable application of the vector map is ensured. Meanwhile, the rotation operation, the uniform scaling operation and the translation operation can be tolerated at the same time. The disturbance caused by the embedding of the information into the vector map can be effectively controlled, and the quality of the watermark-contained vector map is effectively controlled.

The invention provides a vector map reversible information hiding method. The method comprises steps that a vertex coordinate is acquired, a reference vertex is selected; quantification step is calculated; watermarking embedding is carried out; watermarking extraction and lossless recovery are carried out. Through the method, according to the reference vertex and precision error tolerance of a vector map, embedding parameters are set, the normalization quantification step is calculated, the reference vertex and a line of each vertex are quantified, the position of each vertex in a quantification section is changed to realize watermarking embedding, disturbance of watermarking embedding on the vector map can be effectively controlled, robustness on rotation, uniform zoom and translation operation is realized, on the other hand, the method can realize lossless recovery of the original data of the vector map after watermarking extraction, and the vector map can be guaranteed to be precisely used.