50results about How to "Suppression is effective" patented technology

The invention is a field seismic data collection technique for petroleum exploration, i.e. on the condition that there is high voltage power line across seismic lines, adopting a method for eliminating monofrequent interference from seismic recording signal to collect original waveform in seismic data Si; on time section, using deep-level time segment to determine amplitude, frequency and time delay of monofrequent strong interference wave yi as monofrequent strong interference wave yi in the whole-channel seismic record, subtracting yi from Si and getting a seismic record without yi, using deep-level seismic data to estimate the monofrequent interference wave, and most effectively estimating energy of the monofrequent interference wave, thus able to furthest eliminate the frequency component of the monofrequent interference wave, avoiding the damage to an effective wave corresponding to the frequency component, and it can eliminate plural monofrequent interference waves one time.

An embodiment of the invention discloses a method and a device for compressing multiples. Well logging data of target work areas and post-stack seismic data of time domains of the work areas can be provided by the method. The method includes determining formation reflection coefficient curve data of well drilling locations of the target work areas according to acoustic wave time difference well logging curve data and density well logging curve data in the well logging data; determining to-be-processed seismic data on the basis of the formation reflection coefficient curve data and determiningseismic sub-data corresponding to target reflection source interfaces in the post-stack seismic data of the time domains; carrying out multiple compressing processing on the to-be-processed seismic data according to the seismic sub-data. The to-be-processed seismic data are used for characterizing seismic data in the post-stack seismic data of the time domains, and the seismic data contain the multiples. Multiple generating reflection interfaces can be represented by the target reflection source interfaces. According to the technical scheme, the method and the device in the embodiment of the invention have the advantage that the inter-formation multiples can be effectively compressed by the aid of the method and the device.

The invention relates to an implementation method for a mixed absorbing boundary condition applied to a variable density acoustic wave equation. The implementation method comprises the steps of dividing a whole simulation region into an internal region and a boundary region, calculating the wave field value of a sound wave of each absorbing boundary layer by using the variable density acoustic wave equation and a variable density AWWE (Arbitrary Wide-angle wave equation) respectively, and performing linear weighting on the two calculation results to obtain the wave field value of the sound wave of each absorbing boundary layer. On the basis of realizing a single variable density AWWE absorbing boundary layer and in 2D (2 dimensional) and 3D (3 dimensional) space coordinate systems, the wave field value of the sound wave of each absorbing boundary layer is calculated by respectively adopting a combination mode of processing edges of the variable density AWWE and processing angles of a modified 15-degree one-way wave equation, and a combination mode of processing faces of the variable density AWWE, the processing edges of the modified 15-degree one-way wave equation and the processing angles of a 5-degree one-way wave equation, and the mixed absorbing boundary condition of the variable density AWWE is realized. The implementation method can be widely applied to the numerical simulation of constant density and variable density acoustic wave equations.

The invention discloses a roller press and an application method thereof, and belongs to the field of rolling pressing equipment. The problem that existing roller presses cannot effectively press workpiece products of which the surface structures are uneven is solved through the roller press. The roller press comprises a base and pressing rollers. Vertical columns are fixedly arranged on the two sides of the base correspondingly. Sliding grooves are formed in the vertical columns. Air cylinders are arranged at the upper ends of the vertical columns. The pressing rollers comprise the lower roller and the upper roller. Lower roller seats are arranged at the two ends of the lower roller correspondingly. Upper roller seats are arranged at the two ends of the upper roller correspondingly. The upper roller seats and the lower roller seats are sequentially arranged in the sliding grooves from top to bottom. Piston rods of the air cylinders are fixedly connected with the upper portions of the upper roller seats. Springs are arranged between the lower portions of the lower roller seats and the base. The roller press can effectively solve the bonding and pressing problem of the products of which the surface structures are uneven. The application method of the roller press can efficiently and safely achieve bonding and pressing of a steel plate structure and an aluminum alloy frame.

The invention relates to a seismic source ghost wave suppression method and system of marine seismic data. In ocean seismic exploration, ghost waves suppress the low-frequency and high-frequency energy of seismic data, generate trapped waves, and reduce the frequency bandwidth and resolution of the seismic data. To eliminate influence of the ghost waves and broaden the frequency band, the invention provides a green-theory seismic source ghost wave suppression method and a system for executing the method based on the shot-geophone interchange principle. The method and system are completely driven by data, it is not required to know any information of the underground structure, and the method and system are suitable for complex marine topography and geological conditions. According to the invention, the trap wave effect caused by seismic source ghost waves in seismic data can be effectively eliminated, the frequency spectrum loss is compensated, and the data frequency band width is broadened.

The invention relates to a submarine multiple prediction and tracking attenuation method in a speed domain, and belongs to the field of seismic data processing and analysis. The specific implementation process of the method mainly comprises the following four steps of: 1) creating a high-resolution speed domain record; 2) predicting a seabed multiple wave velocity spectrum based on an initial speed domain record; 3) tracking a hyperbolic multiple event; and 4) utilizing multiple wave event attenuation of FK fan-shaped filtering. Compared with a conventional multiple suppression method, the method does not depend on the period of multiple waves, and does not need to carry out dynamic correction processing on an input CMP gather; multiple wave suppression is carried out in a time-space domain, and the influence of a truncation effect is avoided; meanwhile, the length of the intercepted and recorded time window can be freely set, and when the time window is relatively small, multiple waves of which the superposition speed is relatively close to that of primary waves can be attenuated, so that the primary waves are prevented from being damaged; compared with a free interface multiple attenuation method, multiple in a far offset channel can be effectively suppressed, and the method has an obvious efficiency advantage.

The invention relates to a peak noise suppression method of variable-window weighted seismic data and aims at solving various problems that peak noise has characteristics of high energy, occurrence time randomness and wide frequency band, a noise source is complicated and variable to cause that a plurality of peak noises have different continuous time and frequency band widths, the peak noise cannot be favorably suppressed by a fixed-window peak noise suppression method and the applicability is poor. Through experiment, the method has a favorable suppression effect on seismic data disturbed bystrong peak noise with different continuous time, the peak noise is effectively suppressed, and the characteristic of a signal can be maintained according to a detected peak noise changing window length autonomous estimation weight. Compared with an existing mid-value substitution method, the peak noise suppression method has the advantages that the resolution of identifying the peak noise is higher, and the signal energy is fully maintained; and meanwhile, the peak noise suppression method is applicable to different environmental situations, the characteristic of the peak noise is analyzed in real time, the peak noise is suppressed, and the quality of acquired data is effectively ensured.

The invention provides a subsonic recognizing and suppressing system and a recognition method thereof. The subsonic recognizing and suppressing system comprises a terminal control center, a monitoring receiver, a subsonic recognizing module, a baseband signal source, a radio frequency exciter, a power amplifier and an antenna, wherein the terminal control center generates digital interference signal data, outputs to the baseband signal source to be processed and then generates modulated intermediate-frequency jamming signals, and the intermediate-frequency jamming signals are converted to required frequency bands by the radio frequency exciter and are amplified by the power amplifier and radiated to a target interference area by the antenna. A sound suppressing module comprises a demodulation module, a band-pass filter module, a digital subsonic recognizing module and a simulative subsonic recognizing module. According to the specific application, either the simulative subsonic recognizing module or the digital subsonic recognizing module is selected. Accordingly, the problem that illegal signals transmitted by equipment with the subsonic function cannot be effectively suppressed by a conventional suppressing system with the subsonic recognizing function in radio monitoring is avoided, and operation needs can be adapted better and met.

The invention provides a data processing method and system for suppressing extremely strong environmental noise. The method comprises the steps of: obtaining the seismic data of an original shot point, and analyzing the seismic data to obtain the distribution rule of environmental noise; according to the distribution rule of the environmental noise, suppressing the abnormal interference noise in a shot domain environment through frequency division abnormal amplitude attenuation; performing ground surface consistency amplitude compensation after suppressing the abnormal interference noise to obtain amplitude compensation data in the shot domain environment; and according to the amplitude compensation data in the shot domain environment, suppressing abnormal interference noise in the CMP domain through frequency division abnormal attenuation by using an iterative processing mode, performing ground surface consistency amplitude compensation after each suppression, and obtaining a denoising processing result after completing the iterative processing. According to the data processing method and system for suppressing the extremely strong environmental noise, the environmental noise can be effectively suppressed, the signal-to-noise ratio of the data is obviously improved, and a high-quality data foundation is laid for pre-stack migration and pre-stack inversion work.

The present invention discloses a pressing method for side reflection waves in marine earthquake data, and belongs to the field of marine earthquake data treatment. The pressing method comprises: analyzing marine earthquake data to obtain marine earthquake total reflection wave information; according to the information, calculating the geographical coordinate of the side reflection source; simulating the wave field of the side reflection waves at the geographical coordinate through the wave field equation of diffraction waves; and on the wave field of the marine earthquake total reflection wave, using a matching subtraction method to remove the stimulated wave field of the side reflection waves. According to the present invention, the geographical coordinate of the side reflection source is calculated and the wave field of the side reflection waves at the geographical coordinate is stimulated to accurately position the side reflection source so as to really and comprehensively obtain the side reflection wave information; the matching subtraction method is used to remove the stimulated wave field of the side reflection waves; and the method is not limited by the frequency spectrum forms of the side reflection wave and the effective reflection wave, the side reflection wave can be effectively pressed, the effective reflection wave can be protected and enhanced, and the signal to noise ratio of the marine earthquake data can be improved.

The invention relates to a metal powder metallurgic forming processing technology. The metal powder metallurgic forming processing technology comprises a bottom plate, a supporting device and a pressing device, wherein the bottom plate is of a rectangular structure, mounting holes are formed uniformly in the bottom plate, the supporting device is mounted in the middle of the upper end of the bottom plate, the pressing device is arranged above the supporting device, and the pressing device is mounted on the bottom plate. The metal powder metallurgic forming processing technology can solve the problems that existing equipment is poor in pressing effect and low in efficiency during compression forming of metal powder, it is easy to deform or even damage the formed blank during demolding to affect the quality effect of the blank, and the production cost of an enterprise is increased as the demolding effect of the blank is poor and the efficiency is low because it is needed to demold a detached die manually when the metal powder of compression forming is demolded by the existing equipment and the like.

The present invention discloses an preserved-amplitude reverse-time migration low frequency noises suppression method and system, the method comprises: inputting seismic data; performing conventionalreverse-time migration; using a preserved-amplitude low-frequency filtering algorithm to perform low-frequency noises suppression; and obtaining a filtering result. The preserved-amplitude low-frequency filtering algorithm firstly performs slide fitting on noises to estimate the low-frequency noises from a seismic signal, and then subtracts the low-frequency noises from an original signal to obtain the filtering result. The method can realise preserved-amplitude suppression of the low-frequency noises generated by the reverse-time migration RTM. The method is more accurate in comparison with conventional methods, and has no residual artifact, and obtains suppressed noises through subtracting data before and after the suppression, indicating that the method achieves effective suppression ofthe low frequency noises without losing the amplitude characteristic of an effective signal.

The invention relates to plate pressing equipment for production of a building material plate. The plate pressing equipment comprises a bottom plate, an electric cylinder device, a pressed-against device, a supporting device, a first bracket device, a second bracket device, a first roller device, a pushing device and a second roller device; a first strut, a first bent rod and a second strut are arranged on the bottom plate; the electric cylinder device comprises a first electric cylinder, first brackets, a first pushing rod and a first fixed block; the pressed-against device comprises a second bracket, a first fixed rod, a third bracket, a first spring, a second fixed block, a pressed-against wheel, a first pressed-against rod and a second bent rod; the supporting device comprises a first riser, second springs, a pressed-against block, a first connecting ring, a first pulling wire and a pulling ring; and the first bracket device comprises a fourth bracket, a first transverse plate, a first vertical rod, a second fixed rod, a first cross rod, a second vertical rod, a first supporting plate and a third vertical rod. The plate pressing equipment disclosed by the invention can carry out a stable plate pressing operation on a building material, and is high in plate pressing efficiency.

The invention discloses a noise suppression method, device and equipment for a vibroseis and a storage medium, and the method comprises the steps: taking a current pressed noise channel as a center, and building a five-dimensional offset vector piece OVT channel set corresponding to the current pressed noise channel; analyzing the five-dimensional spectrum of the five-dimensional OVT gather to obtain an apparent inclination angle of the five-dimensional OVT gather; superposing the five-dimensional OVT gather along the apparent dip angle to obtain a noise suppression model channel; and carrying out noise suppression on the initial domain seismic data corresponding to the noise suppression model channel by utilizing conversion among different domains to obtain target seismic data corresponding to the vibroseis, thereby realizing effective suppression of the noise in the black triangular region and better recovering effective signals, enhancing the effective signals outside the black triangular region and improving the signal-to-noise ratio of the data.

The invention discloses a pressing device for regenerated cotton production. The pressing device comprises a base, four supporting rods are installed at the top end of the base, a placement groove isformed in the middle of the top end of the base, the top ends of the four supporting rods are jointly provided with a first supporting plate, the bottom end of the first supporting plate is provided with a motor, an output shaft of the motor is provided with a first gear, the top end of the first supporting plate is provided with a rotating shaft, the top end of the rotating shaft is provided witha second gear, the axis position of the second gear is provided with a threaded hole, the second gear is connected with a screw rod through a threaded hole, the bottom end of the screw rod penetratesthrough the rotating shaft to extend to the position below the first supporting plate, the top end of the screw rod is extended to the position above the first supporting plate, the second gear is engaged with the first gear, the bottom end of the screw rod is provided with a second supporting plate, and the bottom end of the second supporting plate is provided with two symmetrical hydraulic cylinders. The pressing device is reasonable in design structure, easy to operate, capable of effectively pressing regenerated cotton and beneficial to taking out regenerated cotton.

The invention discloses a special-shaped structure type household tofu pressing and forming device. The device comprises a supporting base, wherein a draining mechanism is arranged at the top of the supporting base, a supporting plate is arranged at the top of the draining mechanism, a mold base and a convex disc are arranged at the top of the supporting plate, a mold body is arranged at the top of the mold base, a plurality of drainage holes are formed in two sides of the bottom of the mold body and penetrate through the mold base, a plurality of supporting feet are arranged on periphery of the bottom of the mold base and fixed to a corresponding end of one side of the top of the supporting plate, and a pressing device is arranged at the top of the convex disc. The device has beneficial effects that soybean milk in the mold body is pressed and formed through the pressing device, labor can be reduced, meanwhile, pressing and forming effect is improved, and the device is simple in structure, convenient to operate and suitable for families.

The invention discloses waterproof bill clamping equipment for economic management, which structurally comprises a storage device, protection plates, screw rods, pressing plates and movable rods, when the waterproof bill clamping equipment is used, a worker presses clamping assemblies, tidied bills are placed on placing plates, the bills are clamped through the clamping assemblies, adjustment is conducted by auxiliary clamping pieces according to the thickness of the bills, the auxiliary clamping pieces are effectively pressed at the two ends of the bills, the protection plates and the pressing plates are pressed on the bills in parallel through cooperation of the threaded rods and the movable rods, and the bills are stored in order through effective cooperation with the clamping assemblies.