30results about How to "Reduced chance of distortion" patented technology

The invention relates to an audio signal processing method and an audio signal processing device for restoring a signal under speaker cut-off frequency to the original sound, which aim to extend the equivalent sound range of a small-sized speaker and enhance the expression of low sound. A virtual low-sound harmonic wave sequence is generated by a feedforward self-multiplication operation method and singly by the grain corresponding to each harmonic wave respectively, so that the proportion of the harmonic waves can be freely controlled and the tone can be controlled; the gain applied to the virtual low-sound signal is adjusted by a virtual low-sound signal sound-type control method and according to the impacting process and the releasing process to control the sound types of the virtual low-sound signal so as to control the hearing feeling of the final sound signal according to requirements to make the sound from 'knocking' more abundant; and the virtual low-sound signal processing effect is enhanced by combining techniques such as a low-sound dynamic range compression technique, a power conservation filter technique, a low-sound signal frequency redivision technique and the like, even if under high speaker cut-off frequency, the quality of the original low sound can still be restored by effectively restoring the virtual low-sound signal.

The invention provides a control device of an air conditioner compressor. The control device comprises a main circuit unit and a weak-magnetic closed-loop regulating circuit, wherein the weak-magnetic closed-loop regulating circuit acquires working data information of the compressor from the main circuit unit, performs analysis and computation according to the acquired information, and supplies a control signal to a contravariant circuit of the main circuit unit so as to control the working voltage and working frequency of the compressor. The invention also provides a variable-frequency air conditioner with the control device of the air conditioner compressor. The invention further provides a control method of the air conditioner compressor. The control method comprises the following steps of: supplying power to the compressor by the main circuit unit; acquiring the working data information of the compressor from the main circuit unit by using the weak-magnetic closed-loop regulating circuit; performing analysis and computation according to the acquired information; and supplying the control signal to the contravariant circuit so as to control the working voltage and working frequency of the compressor. A power factor correction (PFC) circuit is matched with the weak-magnetic closed-loop regulating circuit to realize the high-efficiency and stable running of the compressor in a high-frequency area and a low-frequency area.

The invention provides a photoelectric sensor, a control method thereof and a pulse detector, relating to the technical field of photoelectric conversion, and being capable of reducing the probability of distortion of pulse signals caused by movement. The photoelectric sensor comprises a light source, a first receiver, a second receiver and a human skin simulation layer positioned at the light outlet side of a light source, the human skin simulation layer is corresponding to the light receiving side of the second receiver, the first receiver is used for receiving light signals generated by reflected light of user skin to be tested, and outputting first electric signals after photoelectric conversion, and the second receiver is used for receiving light signals generated by reflected light of the human skin simulation layer, and outputting second signals after photoelectric conversion. The photoelectric sensor also comprises a processor connected with the first receiver and the second receiver, is used for receiving the first signals and the second signals and outputting the pulse signals after carrying out negative compensation on the first electric signals by adopting the second electric signals.

The present invention provides a dynamic process online monitoring device for an electric power system and a method thereof. The device uses monitoring apparatuses for a multi-channel collecting at high speed, automatically recording, storing, and displaying electric quantity, which can collect each voltage, current, active power, reactive power, frequency, switching value and the like realtimelythrough multiple channels at high speed. The method comprises circularly collecting 100mS data according to the set parameters, comparing realtimely, recording the data for 10 min if any channel accords with the starting condition, storing the recorded data to the hardware, and then returning the initial part, and continuing the collecting and calculating. The device can calculate transient harmonics (up to 50 orders) of any part of data wave at the same time, give the total harmonic distortion, each harmonic ratio and each harmonic value. The device employs advanced and stable Linux multitaskoperating system, the whole software uses Web / Brower mode, and professional offline data analysis software is also provided.

A mold core includes a forming pin having a hollow interior and an end wall. A passage, preferably in the form of a hollow tube, extends into the hollow interior of the forming pin and has an end sealingly secured at a position spaced from the end wall of the forming pin. A poppet valve is disposed on the end wall of the forming pin. The poppet valve is responsive to air pressure within the passage to open and permit flow of air through the end wall of the forming pin to assist stripping of molded articles from the mold core. The poppet valve includes a valve element having an outer end at the end face of the forming pin and an inner end adjacent to the end of the passage. A spring preferably biases the valve element to a closed position. The spring preferably comprises a coil spring captured in compression between the valve element and the forming pin.

The invention discloses a nano-composite type insulated flame-retardant cable material. By using MCM-22 raw powder, low-density polyethylene, polystyrene, bert-butyl phenol, phenolic resin, hydroxyapatite, N-ethyl-N-zinc phenyldithiocarbamate and ethylene-propylene rubber as main raw materials, LDH metal ion exchange on the an MCM-22 nano-material is carried out and then low-density polyethylene modification treatment on the nano-material is carried out; by componding a bert-butyl phenol phenol-amine resin with a polyene modified material, an environment-friendly nano insulated cable material can be prepared. According to the nano-composite type insulated flame-retardant cable material disclosed by the invention, the LDH metal ion exchange on the MCM-22 nano-material is carried out and then low-density polyethylene modification treatment on the nano-material is carried out, and the bert-butyl phenol phenol-amine resin and the polyene modified material are compounded, so that a part of the nano-material can produce more inorganic nano insulated components and the other part of the nano-material can improve the charge flow, and therefore, the average breakdown strength is enhanced, the process indexes are improved, and the material has excellent insulativity and flame retardance.

The invention provides a system for structuring Notes data, which is used for transforming unstructured data input to the Domino server into structured data. The system comprises a data transformation server which connects the Domino server and an application system layer, and the data transformation server comprises: a document-type data receiving module, which is used for receiving the unstructured data from the Domino server; a data type transformation module, which is used for carrying out the transformation of data type to the received data so as to allow the data in the established data structure to comply with the standard of a relation database; a data structured module, which is used for taking out the data, the type of which is transformed, the data taken out is encapsulated, independent objects are produced one by one, and the demanded data structure is established; an output module, which is used for outputting the structured data to the application system layer. A method for structuring Notes data is disclosed either. The system simplifies the Notes data structured system, reduces the flow distance and conversion times of the input data, thus reducing the ratio of data distortion.

The invention relates to a method for an IP set-top box to receive the network data. The method comprises the following steps that: the IP set-top box is started to load a network card driver and to start a consumer process; the network card driver receives the network data and filter the network data as well as verifying the integrality of the network data according to the filter condition provided by the user process; the network data after the filter and the verification of the integrality is written into a memory unit by the network card driver; the user process reads the written network data from the memory unit and transmits the network data to a decoder to decode. The method for an IP set-top box to receive the network data of the invention is short in the time of processing the network data so as to ensure that a program can be smoothly played.

The embodiment of the invention discloses a location information determining method. The method comprises the steps of reading geographical location information of a to-be-determined target network account, wherein the geographical location information is the location information of a user who pays attention to the target network account; obtaining feature coding parameters according to the geographical location information; receiving sample marking parameters of a network account of the user, and determining model training parameters according to the sample marking parameters and the feature coding parameters; determining actual geographical location information according to the model training parameters and the feature coding parameters, wherein the actual geographical location information is used for indicating a geographical range which is served by the target network account currently. The embodiment of the invention also provides a server. According to the method and the server provided by the embodiment of the invention, the dynamic change conditions of the user who pays attention to the target network account can be taken into consideration; the actual geographical location information can be determined according to the geographical location of the user who pays attention to the target network account; therefore, the data distortion possibility is reduced; and the accuracy of determining the actual service information of the network account by the server is improved.

The invention discloses grids for a sintering pallet, which relates to the field of sintering pallet technical equipment of metallurgical machinery, in particular to the field of grid structure. Each grid comprises a grid body; two side surfaces of the grid body are fixedly connected with a first boss respectively; second bosses are arranged on the two sides of each first boss respectively; and each second boss is fixedly connected with the grid body. A second boss is added to each of the two sides of each boss, namely that each side surface has three bosses. The grids are closely arranged on the pallet and mutually extruded, thereby greatly reducing the probability of the grids for twisting left and right. The invention effectively reduces the probability of grids for turning and damage, prolongs the service life of the grids, reduces the grid replacing frequency, increases the production efficiency and lowers the production cost.

The invention provides a USB connecting apparatus, a USB structure and a terminal. The USB connecting apparatus comprises a first impedance matching apparatus and a second impedance matching structure; one end of the first impedance matching apparatus is connected with a first differential signal pin of a universal serial bus (USB) interface while the other end is connected with the first connecting end of a printed circuit board (PCB); the first connecting end of the PCB is connected with the first differential signal connecting end of a processor; one end of the second impedance matching apparatus is connected with a second differential signal pin of the USB interface while the other end is connected with the second connecting end of the PCB; and the second connecting end of the PCB is connected with the second differential signal connecting end of the processor. By adoption of the USB connecting apparatus, improvement to connecting impedance mismatching of a USB data line is realized, so that anti-interference property is further improved and distortion probability is lowered.

The invention discloses an elastic alignment pipe component for the perforation of oil and gas wells, thus solving the problem of the existing hardwired alignment pipe that in the actual assembly process, the control of the accumulative error of the system is difficult. The elastic alignment pipe component is formed by splicing a first alignment pipe and a second alignment pipe, the inner cavity diameters of the first alignment pipe and the second alignment pipe are the same, the first alignment pipe comprises a first alignment pipe seat and an alignment pipe joint; and the second alignment pipe comprises a second alignment pipe seat and an alignment pipe plug, the alignment pipe plug is inserted in the alignment pipe joint, the first alignment pipe seat is connected with the alignment pipe joint through an elastic part, and the second alignment pipe seat is connected with the alignment pipe plug through another elastic part. As the alignment pipes are guided mutually and connected in a matched mode, the field assembly of the alignment pipes is particularly easy and the destructive effect of top extrusion can not appear. The phenomena that irregular nested sediments are formed in the pipe cavity and the gun barrel is blocked can be avoided and reduced after operations.

The invention discloses a method for quantifying the new-old asphalt interface fusion degree based on the performance of an asphalt mixture. The method comprises the steps of pretreating RAP, and determining synthesis design gradation and the optimal asphalt consumption; screening conventional performance indexes capable of being used for quantitatively calculating the new-old asphalt interface fusion degree DOB, and determining the change relationship of the performance indexes along with the asphalt consumption; determining performance index test results P1, P2 and P3 of the concrete sampleand effective asphalt contents x1, x2 and x3 in a black stone state, an actual regeneration state and a 100% complete fusion state of a new-old asphalt interface; and calculating to obtain the new-oldasphalt interface fusion degree in the actual regeneration state according to the effective asphalt content proportion relationship in different states. According to the method, high-end instrumentsand equipment are not needed, the new-old asphalt interface fusion degree DOB of the recycled mixture can be obtained through a mix proportion design process in a simple and crude engineering field laboratory, and engineering field construction personnel can conveniently judge the RAP regeneration performance in time.

The invention discloses an F-OFDM peak-to-average ratio suppression method based on three major application scenarios of 5G. The method comprises a sending end part; the sending end part comprises the following steps: modulating three sub-band signals by adopting different modulation modes respectively, and then pre-mapping the modulated sub-band signals to sub-carriers with respective numbers; performing serial-to-parallel conversion on the modulated three sub-band signals to obtain multiple paths of parallel composite signals, and then performing selective mapping processing on each sub-band; adding a cyclic prefix to each sub-band signal symbol, and converting multiple paths of composite signals into one path of serial signals through parallel-serial conversion; performing filtering operation on the three sub-band signals after the parallel-serial change by adopting respective digital filters to obtain filtered three sub-band signals; respectively carrying out iterative amplitude limiting filtering processing on the filtered three sub-band signals, and then sending the signals subjected to iterative amplitude limiting filtering to a receiving end. According to the method, the peak-to-average ratio of the F-OFDM three-sub-band signal can be effectively reduced.

The invention provides a user demand point accurate extraction system and method based on a feature space. According to the method, data assignment and integral operation are introduced, a correlation coefficient solving method is adopted, a historical demand feature space vector construction method and a precise demand point output formula are adopted, user demand features are deeply mined, and a precise demand point feature extraction algorithm is constructed.

The invention discloses a novel low-frequency decoupling unit. The low-frequency decoupling unit is composed of radiation arms. The radiation arm comprises a plurality of conductor sections which are oppositely arranged in pairs according to preset intervals, and the side end of each conductor section is provided with a resonance structure which is separated from the conductor section. The antenna has the advantages that high-frequency induction current can be coupled, distortion of a directional diagram of the high-frequency radiation unit of the antenna is not easily caused, and the coverage effect and the channel quality of the high-frequency radiation unit of the antenna can be ensured.

The invention relates to the technical field of intelligent lighting equipment control systems, in particular to a multi-LED display control method and system, a terminal and a medium, and aims to overcome the defect that in the prior art, in the process of controlling LED display, an LED system provides a real-time display function, but when an input signal is lost, the LED system cannot display any image. According to the technical scheme, the multi-LED display control method comprises the following steps: obtaining a media file, and recognizing and classifying the media file; setting a cache space for storing the media file, and storing the to-be-played media file in the cache space according to classification; obtaining the playing setting information of the media file, and calling and playing the media file according to the playing setting information of the media file. The effect of improving the display stability of the LED system is achieved.

The invention discloses a pipe expanding device. The pipe expanding device comprises a rack, a pull rod, an expanding head and a driving mechanism. A positioning mechanism is arranged on the rack, and the positioning mechanism is used for positioning a heat exchanger, wherein a pipe fitting is fixedly arranged on the heat exchanger in a penetrating manner. The pull rod is movably arranged on the rack, is arranged in the pipe fitting in a penetrating manner and extends in the axial direction of the pipe fitting. The expanding head is detachably connected to the top of the pull rod and is matched with the inner diameter of the pipe fitting. The driving mechanism is connected with the pull rod and is used for driving the expanding head to move up and down and rotate. According to the pipe expanding device of the above structure, an expanded rod is composed of the pull rod and the expanding head, the expanding head is detachably connected to the pull rod, before pipe expanding operation, the pull rod upwards penetrates through the to-be-expanded pipe fitting, then the expanding head is installed at the top of the pull rod, the driving mechanism drives the pull rod to move downwards and rotate so that the expanding head can rotate in the process of moving downwards relative to the inner wall of the pipe fitting, the expanding head is prevented from directly and rigidly colliding with the inner wall of the pipe fitting, the distortion probability of the expanded rod is reduced, and the service life of the expanded rod is prolonged.

The invention discloses an improved blade forging device. The improved blade forging device comprises a base and a hydraulic mechanism. The base is provided with two installing grooves internally provided with a first lower die and a second lower die respectively. A second upper die and a second upper die are arranged below the hydraulic mechanism. A rotating rod is connected to the base through a shaft. The top of the rotating rod is connected with the first lower die. The base is provided with a hydraulic tappet hinged to the rotating rod. A first containing cavity is formed in the joint of the first lower die and the first upper die. The first containing cavity is communicated with the interior of the first lower die and the interior of the first upper die through a first slit. A supporting table is arranged on the edge of the inner side of the second lower die, a boss is arranged on the inner side of the second upper die, and the boss is in sliding contact with the side edge of the supporting table. The invention further provides a forging method with the improved blade forging device adopted. By means of the improved blade forging device and the forging method thereof, the defects in the prior art can be overcome, and the effect of blank overflow on later machining is reduced.

The invention discloses a petroleum drilling and production machine convenient to disassemble and assemble. The petroleum drilling and production machine structurally comprises a tail section, middlesections, an end section and a drill bit, wherein the middle sections are connected with the tail section and the end section in an assembly mode, the end section is connected to the drill bit, each middle section is composed of a belleville spring structure and a piston device, the belleville spring structures are connected to the piston devices in an assembly mode, the end section is provided with a valve position, the drill bit includes a resilient structure and a drill bit body, the resilient structure is connected to the drill bit body, each belleville spring structure includes a belleville spring plate and a transmission belleville spring, the belleville spring plates are adjacent to the transmission belleville springs, the belleville spring structures are provided with belleville spring assembling joints, and each piston device comprises a piston plate, a transmission piston and a piston tail plate. According to the machine, a sensing board carries out real-time ranging to control the transmission of the resilient structure, so that the resistance of the drill bit during propulsion is not increased, the rotating speed is stable, the abrasion of the drill bit during running is reduced, the belleville spring structures and the piston devices are reinforced through spring correcting devices and the piston tail plates, transmission dislocation and spring twisting are avoided, and the overall pushing effect of the tool is good.

The invention relates to a special airbag for carrying heavy goods, and the airbag is a carrying tool for large-sized and overweight components. The invention aims at solving the technical problems ofchanging larger diameter and relatively lower air pressure of existing airbags, poor rigidity, burst caused by airbag distortion due to the effect of various uneven contact surfaces, uneven frictional force and the like, which leads to human casualty accidents. The special airbag for carrying heavy goods is characterized by being composed of an airbag body, an airbag head and airbag mouths distributed at both ends of the airbag head, and diameter of the airbag is 0.4-0.78m.