44results about How to "Avoid accumulating errors" patented technology

A system and method for audio splicing (insertion) of an Ad audio stream in the compressed domain, where variable early delivery of the Ad audio stream and variable bit rate are allowed, without creating audio distortion, glitches, or other digital artefacts or errors, in the resultant audio stream is disclosed. The present system and method provides for a splice delay buffer which delays the first five Ad audio frames until transmission of the last frame of the primary audio stream, but before the splice time. Subsequent Ad audio frames are delayed by a fixed amount, where the fixed amount is greater than the frame delay of the primary audio stream, to allow for ease of splice back to the primary audio stream.

The invention provides a course angle rotation-based multi-beam side-scan sonar image real-time splicing method. The method comprises the following steps of: acquiring initial data in all channels of a multi-beam side-scan sonar, and setting an initial position for splicing images; removing a water column area generated because an energy transducer receives an underwater noise before a first echo point returns; writing N channel data of the first ping in the initial data from which the water column area is removed into a canvas, and recording the current ping number and the current course angle; reading N channel data of the next ping and corresponding global positioning system (GPS) and course angle information, calculating the difference value between the course angles of the first ping and the next ping, if the course angle does not change, splicing the images in sequence according to the GPS information, and if the course angle changes, splicing the images after rotating the data, wherein the rotating angle is the difference value between the course angels; and modifying gaps in the spliced image. The invention discloses a multi-beam side-scan sonar image real-time splicing method which is high in precision and low in calculation amount and has a good display effect.

The invention belongs to the field of bridge construction, and particularly relates to a steel box beam jacking pushing and slide moving construction method and a beam falling auxiliary device. The method comprises the following steps of (1) cutting mark marking; (2) reference section installation; (3) deviation pre-correction before section in-place; (4) margin cutting; (5) section fine adjustment; (6) beam bottom leveling padding; (7) beam falling auxiliary device installation; (8) beam falling positioning; (9) beam falling bridge forming. The method and the device provided by the invention have the beneficial effects that the construction is simple and convenient, the efficiency is high, the construction and the installation are accurate, and the like.

The invention relates to a three-degree-of-freedom precision-positioning workbench, comprising the workbench and an enlarged base, wherein, the workbench and the enlarged base are positioned through three cylindrical rods; and three groups of two-stage enlarging mechanisms are vertically intersected to form the enlarged base. The precision-positioning workbench can reach nanoscale positioning precision, has good operability, effectively overcomes the problem of input and output coupling among the three groups of micrometric displacement enlarging mechanisms, and increases the operating flexibility.

A vehicle-mounted alternating-current-generating hydraulic driving device comprises a chassis power takeoff unit, an alternating-current generator, a closed hydraulic pump, a hydraulic motor, a radiator, a replacement flushing valve, a hydraulic oil tank and a programmable controller. The hydraulic pump is connected with the chassis power takeoff unit, an oil outlet of the closed hydraulic pump is connected with an oil inlet of the hydraulic motor, an oil inlet of the hydraulic pump is connected with an oil outlet of the hydraulic motor, the oil inlet and the oil outlet of the hydraulic motor are connected with a flushing oil port of the replacement flushing valve, an oil outlet of the replacement flushing valve is connected with an oil inlet of the radiator, an oil outlet of the radiator is connected with an inlet of the hydraulic oil tank, an outlet of the hydraulic oil tank is connected with the closed hydraulic pump, a hydraulic pump rotating speed sensor and a motor rotating speed sensor are respectively connected with the programmable controller which connected with a variable servo valve, and the hydraulic motor is connected with the alternating-current generator. By the vehicle-mounted alternating-current-generating hydraulic driving device, rotating speed of the hydraulic motor driving the generator is maintained constant, and the hydraulic motor can be mounted at any position of a vehicle, so that the problem that mounting space of a high-power generator is limited is solved.

The invention provides a rotary dry powder packing machine which comprises a rack, wherein a rotating shaft is rotatably mounted on the rack, a rotating cylinder is fixedly mounted on the rotating shaft, a plurality of annularly distributed packing devices are arranged uniformly at the bottom of the rotating cylinder, each packing device comprises a bag insertion starting device used for starting the whole set of the packing device after bag insertion, an automatic metering device used for weighing a packing bag, a sealing device used for sealing a discharge rubber tube after the last packing bag is packed, an automatic bag dropping return device used for automatically dropping the packing bag after the packing bag is packed, and a dust collection device used for processing the raised dust leaking from a dust discharge nozzle of the automatic bag dropping return device, and the bag insertion starting device, the automatic metering device, the sealing device and the automatic bag dropping return device are all electrically connected with a control system of the rotary dry powder packing machine. The rotary dry powder packing machine achieves automated packing production, is simple in operation and accurate in metering, simplifies the operation process, and also improves the production capacity and the working efficiency.

The embodiment of the invention discloses a battery charge state determination method and a device, wherein the phenomenon that the charge state goes beyond the normal physical range is reduced. The method comprises the steps of according to the equivalent circuit model of a battery and the Kalman filtering algorithm, obtaining a first parameter value for the relevant parameters of the battery charge state; if the first parameter value is within a preset range, obtaining an optimal solution for the battery charge state at the current moment based on the first parameter value; if the first parameter value is out of the preset range, replacing the first parameter value with a preset second parameter value for the relevant parameters, and obtaining the optimal solution for the battery charge state at the current moment, wherein the second parameter value is within the preset range.

The invention discloses an octagonal-box-shaped pylon foot which comprises a frame unit and a pylon bottom plate unit. The frame unit comprises a frame, a middle web and a transverse separating plate, wherein the frame is defined by a group of wallboards, the middle web is axially arranged in the frame, and the transverse separating plate is radially arranged in the frame. The pylon bottom plate unit is arranged at one end of the frame unit. The octagonal-box-shaped pylon foot is reasonable in design, firm in structure and good in bearing capacity, and guarantees the quality of a whole project. According to the method, the quality of each member and each unit is ensured, welding stress concentration is effectively controlled, accumulative errors generated by large members are prevented, and thus the machining quality of the whole pylon foot is guaranteed.

The invention discloses a gas producer deslagging device which comprises a slag plate, a supporting part arranged on the bottom of the slag plate, a driving part for driving the slag plate to rotate and an airduct. The slag plate comprises a plate body, a rotary sleeve disposed on the bottom of the plate body, a supporting runner and spacing teeth. The supporting part comprises a base pier and a central supporting part. The supporting runner is arranged on the base pier. The central supporting part comprises a cannula sleeved outside the rotary sleeve and at least two support arms which are fixedly connected with the outer wall of the cannula. The gas producer deslagging device is characterized by comprising a stop part, a central rotating part and a floating part as well. The stop part comprises a support and a lever type stop rod which is arranged on the support through a rotating shaft. An indirect rotation mechanism comprises an inner ring fixed on the outer wall pipe section of the rotary sleeve and a middle ring which is sleeved between the inner ring and the cannula. The floating part is composed of a water seal, the bottom of which is connected with the airduct. The rotary sleeve is positioned in the water seal. The bottom of the inner ring is sleeved at the opening part of the water seal. By the adoption of the gas producer deslagging device, deslagging smoothness and stability are raised, and failure rate of the equipment is reduced.

A computer-implemented method, and system implementing the method, are disclosed for computing a final model of elastic properties, using nonlinear direct prestack seismic inversion for Poisson impedance. User inputs and earth-model data is obtained over points of incidence of a survey region, at various angles of incidence. Various models are then computed that serve for lithology identification and fluid discrimination and take part in preliminary seismic exploration and reservoir characterization. Therefore, further refinement of these models is required due to changes in burial depths, compaction and overburden pressure, as they provide limitations for reservoirs on porous media. The further refinement using nonlinear direct prestack seismic model is performed on a system computer, which produces a final model of elastic properties. This model can then be applied for lithology prediction and fluid detection to identify potential targets of oil and gas exploration and estimating spots in unconventional shale gas applications.

The invention relates to a hypersonic target TBD accumulation detection method through space-time polynomial radon transformation and belongs to the field of radar signal processing and data processing.According to the characteristics that a hypersonic target of the near space is long in distance, ultra high in speed and high in accelerated speed, modeling is conducted on movement of a target azimuth dimension and a radial distance dimension with a polynomial, parameter research is conducted in the azimuth dimension and the radial distance dimension, and energy accumulation is achieved in a parameter space of space-time polynomial radon transformation.By means of the method, TBD accumulation is conducted under a polar coordinate system, the problems that a measuring trajectory topology is seriously deformed under a rectangular coordinate system, and it is difficult for the measuring path topology to be matched with a real trajectory are solved, accumulation is conducted by means of amplitude of signals, the accumulated error brought by radar signal binarization preprocessing conducted by a traditional TBD is avoided, the false-alarm probability is lowered, and real-time performance of detection is improved.

The invention relates to a spacecraft inertial navigation method and system based on a gravitational field, a medium and equipment. The method comprises the following steps: determining initial parameters; determining the time change rate and the six-dimensional number of geodesic line reference points at the current moment; acquiring actual measurement parameters of the spacecraft at the currentmoment; according to the initial parameters, the time change rate and the six-dimensional number of the geodesic line reference points at the current moment and the actual measurement parameters of the spacecraft at the current moment, calculating the six-dimensional number change amount of the spacecraft relative to the geodesic line reference points at the current moment; and calculating the six-dimensional number of the spacecraft at the current moment according to the six-dimensional number of the geodesic line reference point at the current moment and the six-dimensional number change amount, and taking the six-dimensional number as an initial parameter of the spacecraft at the next moment. On the basis of inertial navigation, a relativistic theory is used for further improving the navigation method, accumulated errors of inertial navigation along with time are avoided, and higher navigation precision is expected to be achieved.

The invention relates to a BMS (Battery Management System) data communication method. The method comprises the following steps: allocating different physical addresses to each first level of a BMS three-level architecture; periodic phase offsets are set for the first levels of different physical addresses, so that the period of sending a complete data packet by each first level is distributed in different sampling periods of completing one-time data acquisition by the second level; and the first stage receives the data acquisition request of the second stage, and transmits a simplified data packet or a complete data packet according to the physical address and the periodic phase offset after acquiring the data of the battery pack. According to the BMS system data communication method, the data packet transmission deviation value is simplified, so that the data is greatly reduced, the bus pressure is reduced, the data capacity is reduced, the system response time is prolonged, and the BMS system communication pressure is reduced. Meanwhile, the complete data packet is sent regularly, error accumulation is prevented, the sending period of the complete data packet is homogenized, communication traffic jam is effectively prevented, and the data transmission efficiency is improved.

The invention discloses a high-precision multi-dimensional adjusting device. A base of the high-precision multi-dimensional adjusting device comprises at least one shaft penetrating hole, and verticalconnecting holes are perpendicular to the corresponding shaft penetrating holes correspondingly. After lead screw gear shafts are arranged in the corresponding shaft penetrating holes in a matched and sleeving manner, gear sections of the lead screw gear shafts are located at the intersection of the two penetrating holes, and axial non-disengaging nuts are arranged on the threaded sections of thelead screw gear shafts. The nuts and the head ends of the shaft penetrating holes are provided with first non-disengaging structures. A rack portion is arranged on one side of each rack lead screw, and each steering non-disengaging nut is arranged on the threaded section of the corresponding rack lead screw. The nuts and the head ends of the vertical connecting holes are provided with second non-disengaging structures. After the rack lead screws are arranged in the vertical connecting holes in a matched and sleeving manner, the rack portions of the rack lead screws are engaged with the gear sections of the lead screw gear shafts. According to the high-precision multi-dimensional adjusting device, multi-dimensional independent axial adjustment and angle adjustment can be achieved. Adjusting operation becomes simple, and the high-precision multi-dimensional adjusting device is easy to use. The structure is compact, reasonable and simplified, the design is optimized, the number of adopted components is the minimum, and the precision degree is improved.