32results about How to "Control disturbance" patented technology

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 relates to a vector map reversible information hiding method based on LSD planes. Top points of a vector map are sequentially scanned to obtain x-coordinate sequences and y-coordinate sequences of the top points; scaling positions of the coordinates are moved towards the right side to obtain new coordinate sequences; MSD planes and the LSD planes are calculated; the LSD planes are sequenced according to the ascending sequence to obtain orderly LSD planes; watermarks are embedded in the orderly LSD planes; the coordinate sequences of the orderly LSD planes containing the watermarks are adjusted to obtain LSD planes containing the watermarks; the coordinate sequences containing the watermarks are obtained through calculating; scaling positions of the coordinates in the coordinate sequences containing the watermarks are adjusted; a vector map containing the watermarks is obtained.

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.

A throttle control device having a quick response and a control stability in the ISC running mode of an internal combustion engine comprises: feedback control means for outputting an amount of activation for activating a drive motor by using a predetermined control gain such that the real opening of a throttle valve detected by a throttle opening sensor for detecting the real opening of the throttle valve may be equalized to either a desired opening based on at least the depression of the accelerator pedal or a desired opening at the ISC time based on at least the speed of the internal combustion engine; and correction coefficient adjusting means for correcting the activation amount outputted from the feedback control means, with a predetermined correction coefficient on the basis of the decision result of a throttle operation mode deciding means for deciding the operation mode of the throttle valve.

The invention relates to a sample introduction system used for an ion-mobility spectrometry detector. The sample introduction system includes a sample introduction shell; and the sample introduction shell is provided with a sample introduction capillary used for connecting the sample introduction system and an ion tube. Through the adoption of the sample introduction system, the pressure values ofan ion tube negative pressure zone, a sample gasification zone and external atmosphere are P2, P1 and P0, the relation of the ion tube negative pressure zone, the sample gasification zone and the external atmosphere is P2 < P1 < P0, and gas flow direction can be realized by the established pressure relation, so that the purpose of sample introduction can be achieved; the sample introduction capillary is the channel for introducing samples; and through the controlling of the size of the capillary and the difference value of the P2 and P1, the sample introduction speed and gas flow of the samples and the disturbance of the gas flow in the ion tube can be effectively controlled.

The invention provides a vector map integrity authentication method. The method comprises the following steps of classifying primitive vertexes; dividing data units; associating the data units; constructing locating information; generating an authentication watermark; embedding the authentication watermark and the locating information; marking primitives; and performing watermark authentication and original data lossless recovery. According to the method, the primitives of a vector map (line or surface) are divided into different data units; the associated data units are allocated to the data units and the locating information of the data units is constructed; the embedding of the authentication watermark and the embedding of the locating information in the associated data units are realized by utilizing a reversible information hiding method; and the data units which the primitives belong to are marked, thereby ensuring accurate locating of the tampered data units and recovery of original data of the non-tampered data units. In addition, original regions of the tampered data units can be accurately located by utilizing the locating information stored in the associated data units of the tampered data units, thereby ensuring reliable application of vector map data.

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 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.

The invention belongs to the field of blasting, and particularly discloses a charging device for presplitting blasting of surrounding holes of a roadway, the middle of a shock-insulation energy-gathering pipe is recessed inwards to form an energy-gathering groove, a top cover plate is arranged at the upper end of the shock-insulation energy-gathering pipe, a bottom cover plate is arranged at the lower end of the shock-insulation energy-gathering pipe, and blasting charges and air columns in the shock-insulation energy-gathering pipe are designed at intervals. A circle of pressure-bearing water medium is arranged on the periphery of the explosive bag, and a wood chip spacing bag is arranged between the explosive bag and the air column. On the basis of the confined water blasting action principle, the presplitting blasting method adopting confined water and air column spaced charging is provided, and the presplitting blasting method has positive significance in guaranteeing smooth blasting of peripheral holes, improving the forming effect of a hard rock roadway, controlling the charging cost and guaranteeing safe production.

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.

The invention provides a reversible information hiding method capable of keeping direction relation for vector maps. The reversible information hiding method comprises the following steps: acquiring vertex coordinates; ordering the vertex coordinates; segmenting the ordered coordinates; calculating borders of the obtained segments; acquiring an extension coordinate sequence of the segments, and embedding watermarks; acquiring the sequence of ordered coordinates containing the watermarks; acquiring the coordinates containing the watermarks; and extracting the watermarks, and carrying out non-destructive recovery. According to the method, vertex coordinates of all coordinate axes are ordered and segmented, embedding capacity is expanded via the boundary coordinates of the segments, embedding parameters are set according to the precision error tolerance of the vector maps, and the relative positions of the vertex coordinates of all the coordinate axes are not changed during watermark embedding by setting a watermark embedding condition, so that the invisibility is relatively high while the original direction relation of the vector maps is kept; moreover, after watermark extraction, initial data of the vector maps are recovered in a non-destructive manner, so that the accurate use of the vector maps can be effectively ensured.

The invention relates to the technical field of tunnel engineering, and discloses a rapid construction smooth blasting method for a half-section micro-step. The rapid construction smooth blasting method comprises the following steps that a constructor formulates an excavation scheme according to surrounding rock conditions, and peripheral holes and auxiliary holes are formed by using an excavationdrilling trolley according to the excavation scheme. According to the rapid construction smooth blasting method for the half-section micro-step, multiple groups of slotting holes are formed, wedge-shaped slotting, multiple wedge-shaped slotting or straight hole layered slotting or spiral slotting is adopted for the slotting holes, and under the condition that the number of detonator sections is enough, part of rock mass at the slotting part should be blasted, so that slotting is easy to take out, the slotting effect can be guaranteed, the single-section dosage of slotting can be reduced, andthe vibration reduction effect can also be guaranteed; and by the adoption of the non-electric millisecond-level or semi-non-electric millimeter-level delay detonators and the detonating cords, the time difference requirement, namely the shock absorption requirement, can be met, meanwhile, operation is convenient, and stability is high.

The invention relates to a clay-based material interface friction performance testing device and method, the testing device comprises: a testing box used for filling a soil sample or a clay-based material, the side wall of the testing box is provided with an access through hole, and the soil sample or the clay-based material filled in the testing box is higher than the access through hole; the test sliding plate is inserted into the in-out through hole and can slide along the in-out through hole; the transmission testing device is connected with one end of the testing sliding plate, pulls the testing sliding plate to slide along the in-out through hole, and measures the pulling force required when the testing sliding plate is pulled to slide; the air compression device is communicated with the test box and applies pressure to the soil sample or the clay-based material filled in the test box; the test method adopts the test device and is realized by a variable comparison and control method. According to the invention, the visual test of the friction performance of the clay-based material in the shield construction process is realized, and the drag reduction effect of the clay-based material can be effectively measured and calculated.

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 discloses an ultra-large silo prestress tension process method. The method comprises the following steps that a hole channel is formed in a buttress column of a silo; jack oil pressure gauge readings corresponding to the tension anchor control force, and the extension amount of each jack piston are solved; penetrating of a steel strand is carried out; a first buttress column 1, a third buttress column 3 and a fifth buttress column are subjected to graded tension through two jacks from top to bottom, and a second buttress column 2, a fourth buttress column 4 and a sixth buttress column 6 are subjected to graded tension through two jacks from bottom to top; hole channel grouting is carried out; pilasters are subjected to anchor sealing; and concrete is cured and end forms are removed.