38results about How to "Eliminate peaks" patented technology

This invention relates to a method and system for the radio location of CDMA and non-CDMA enabled transmitters within a reception zone. The invention exploits the superposition of antenna patterns that create complex and asymmetrical interference structures at very small scales. By randomly distributing a random antenna array of M elements across a two or three-dimensional surface, fine scale interference structures on the scale of ¼ the carrier wavelength are generated. Once the minimum number of antennas are placed, additional antennas will not improve the resolution. Such interference structures when sampled at ⅛ the carrier wavelength or greater yields unique spatial patterns with respect to a given antenna array geometry and transmitter location. The invention incorporates signature recognition (matching) and orthogonal sub-space projection estimators to derive location estimates of a radio transmitter.

This invention relates to a method and system for the radio location of CDMA and non-CDMA enabled transmitters within a reception zone. The invention exploits the superposition of antenna patterns that create complex and asymmetrical interference structures at very small scales. By randomly distributing a random antenna array of M elements across a two or three-dimensional surface, fine scale interference structures on the scale of ¼ the carrier wavelength are generated. Once the minimum number of antennas are placed, additional antennas will not improve the resolution. Such interference structures when sampled at ⅛ the carrier wavelength or greater yields unique spatial patterns with respect to a given antenna array geometry and transmitter location. The invention incorporates signature recognition (matching) and orthogonal sub-space projection estimators to derive location estimates of a radio transmitter.

System and method for preprocessing a signal for transmission by a power amplifier. In a preferred embodiment a multiple input multiple output processor is coupled to a plurality of power amplifiers for transmitting a signal, where the number of power amplifiers exceeds the number of antennas. The multiple input multiple output processor performs an algorithm to optimize the output vector ensuring that the transmit power for any one amplifier is below a predetermined threshold. In a preferred embodiment a Remez optimization algorithm is performed. Alternative optimization algorithms may be used. In a preferred embodiment the processor is a single integrated circuit. A method is disclosed where a multiple output vector is produced for transmission, using an optimization algorithm to produce an output vector that ensures that for any of the power amplifiers, the transmit power is maintained below a predetermined threshold.

The invention provides a three-way pressure compensator assembly. A three-way pressure compensator has two working positions. A spring cavity of the three-way pressure compensator is communicated with an LS port and a T port through a liquid resistance network and communicated with a P port through a dynamic damping hole. One end of the liquid resistance network is communicated with the T port, and the other end of the liquid resistance network is communicated with the LS port through a filter screen. A lower cavity of the three-way pressure compensator is communicated with the P port through a damping hole. The three-way pressure compensator assembly has the advantages that the half-bridge liquid resistance network, the dynamic damping hole and the oil inlet fixing damping hole are matched, stability of LS feedback pressure of the three-way pressure compensator is effectively achieved, it is guaranteed that a valve element of the three-way pressure compensator moves stably, and therefore stable flow division is achieved; the peak value of fluctuation of load pressure is effectively eliminated, pressure gains are reduced, and it is guaranteed that all actuators are stable; a quantitative load-sensitive system can achieve the functions that the flow is small when pressure is high and the flow is large when pressure is low.

Disclosed is a three-dimensional (3D) mesh compression apparatus and method. The 3D mesh compression apparatus may generate a base mesh through a mesh simplification, may separately compress the base mesh and peaks eliminated by the simplification, may construct a covariance matrix based on a topological distance between the eliminated peaks, and may compress 3D mesh data based on the covariance matrix.

The invention provides a timing synchronization method in a low-orbit satellite communication system. The timing synchronization method is characterized by comprising the following steps: selecting longest linear feedback shift register sequences to construct a training symbol, wherein the training symbol has two front and back reverse parts, the total length is N, the front half part N / 2 is reverse to the back half part N / 2, and meanwhile two parts N / 4 in each N / 2 part form conjugate antisymmetry; further improving a time domain structure of the training symbol, so that the time domain structure becomes a dual conjugate antisymmetry structure; and calculating the improved training symbol according to a timing synchronization measurement function to obtain a time domain measurement result. By adoption of the method, related peak values of timing positions can be eliminated, no platform effect is generated, and meanwhile the sidelobe phenomenon is also well inhibited.

The present invention adds gain and phase into a canonical second order system in order to mitigate the adverse effects of unwanted resonance, where the gain is added to the forward path of a control loop of the system and is a ratio of the square of the system and mechanism frequencies, and the phase lead (H-factor) is added to the feedback path of the control loop of the system and is a complex ratio of these frequencies which includes a dc-component (Hdc) and a zero- or pole-component. By adding gain and phase lead, which is contrary to current approaches to addressing resonance, the present invention achieves the desired result of resonant free application in a canonical resonant-prone system of second order, and the methodology is applicable to higher order systems.

The invention discloses a digital peak clipping method and a digital peak clipping device, and belongs to the field of communication. The digital peak clipping method includes generating output noise signals according to amplitude values of carrier aggregation (CA) signals and a preset peak clipping threshold; acquiring frequency points, bandwidths and sampling rates of various first carrier signals in the CA signals; generating CA peak clipping coefficients according to the frequency points, the bandwidths and the sampling rates of the various first carrier signals and actuating filter processing for the CA peak clipping coefficients and the output noise signals to generate filtered and formed noise signals; and aligning the CA signals with the filtered and formed noise signals after the CA signals are delayed, and subtracting the filtered and formed noise signals from the delayed CA signals to generate peak clipping signals. The digital peak clipping method and the digital peak clipping device have the advantage of capability of reducing the peak clipping missing probability.

Assembly (10) for an electronic locking system (84), the assembly (10) comprising an actuating element (12) rotatably arrangable with respect to a base member (16) for rotation about a first axis (18) and rotatably arranged about a second axis (24) substantially perpendicular to the first axis (18), an electric generator (74) comprising a rotor (76), and a transmission arrangement (82) configured to transmit a rotational actuation of the actuating element (12) about the second axis (24) into a rotation of the rotor (76) of the electric generator (74) to generate electric energy.

The invention discloses a preparation method of a graphene low-temperature battery. The preparation method is applied to batteries of lithium titanate negative pole systems. An existing rechargeable battery only can be charged to 50-70% the total battery capacity in a low-temperature environment. The preparation method includes the steps that slurry needed for coating a battery positive pole plate is prepared from a lithium manganate positive electrode, a binding agent and a conductive agent; homogenate of slurry needed for coating a battery negative pole plate is prepared from a conductive agent containing conductive graphene slurry; coating of the battery positive pole and the battery negative pole is carried out, and blank foil is reserved on the upper and lower sides of the positive pole and the negative pole; rolling and cutting of the battery positive pole plate and the battery negative pole plate are carried out; battery assembling is carried out; battery formation and aftertreatment are carried out. The preparation method has the advantages that the battery can be charged to 90% the total battery capacity within 6 min in an environment where the temperature is -40 DEG C, and meanwhile the battery has super-high cycle performance and low internal resistance.

The invention provides a multilayer video transmission peak value removing method and system in a cloud conference and a storage medium, and the method comprises the steps: carrying out the initialization of a multilayer video, carrying out the reasonable control of each layer of coding frame according to a set code rate and an initialization wrong frame parameter of each layer, uniformly staggering an IDR frame with the maximum data size in each layer of video, and meanwhile, by adopting a method of dynamically adjusting a frame staggering interval, reducing and eliminating the possibility of code rate peak value occurrence at a multi-layer video coding end under the conditions of not reducing video quality, not increasing video delay and not reducing video continuity, so that the interaction with back-end transmission is simplified, a transmission layer flow control algorithm is combined, stable transmission of multi-layer video streams is realized, and the reliability of wide area internet video communication and the user experience are improved.

The invention discloses a load sensitive hydraulic control system, comprising a multipath directional control valve and a load sensitive pump having a load sensitive valve, wherein, a liquid inlet and an oil drain port of the multipath directional control valve are respectively communicated with a liquid outlet and an oil tank of the load sensitive pump, a load feedback port of the multipath directional control valve is communicated with a sensitive cavity of the load sensitive valve, and each uniting valve oil port of the multipath directional control valve is respectively connected with the corresponding executive component; the passage between the load feedback port of the multipath directional control valve and the sensitive cavity of the load sensitive valve is provided with a damper valve; the oil duct between an oil inlet and an oil outlet of the damper valve is provided with at least two dampings, and the oil duct between the adjacent two dampings is provided with a chamber having an enlarged cross section; and the oil outlet is communicated with the load feedback port of the multipath directional control valve, and the oil inlet is communicated with the sensitive cavity of the load sensitive valve. In addition, the invention provides a crane having the load sensitive hydraulic control system.

The invention relates to an automobile constant speed driving shaft. The automobile constant speed driving shaft comprises a left half axle and a right half axle, wherein the left end of the left half axle is assembled with a left side wheel through a left half axle fixed knot, the right end of the left half axle is assembled with a left side half axle gear of a differential mechanism in a power transmission device through a left half axle moving knot, the left end of the right half axle is assembled with a right side half axle gear of the differential mechanism in the power transmission device through a right half axle moving knot, the right end of the right half axle is assembled with a right side wheel through a right half axle fixed knot, the right half axle is of a hollow axle tube structure, the left half axle is of a solid rod axle structure, the length of the right half axle hollow axle tube is X, the length of the left half axle solid rod axle is Y, X is greater than Y, the torsion rigidity of the right half axle is K right, the torsion rigidity of the left half axle is K left, and the K right is equal to the K left. The automobile constant speed driving shaft not only solves the off-tracking problem during dynamic load acceleration running of the whole vehicle caused by inconsistent torsion angles of the left half axle and the right half axle, but also eliminates resonance phenomenon caused by different rotating speed working conditions of the engine, so that the NVH (Noise Vibration and Harshness) performances and economical performance of the vehicle are improved.

The invention relates to a silencer, an engine and an engineering mechanical device. The silencer comprises a shell, an air inlet pipe and an air outlet pipe. The air inlet pipe and the air outlet pipe are arranged on the shell. The shell is internally provided with a plurality of communicating silencing cavities. Each silencing cavity comprises a plurality of main silencing cavities, wherein at least one main silencing cavity is provided with at least two sub-cavities communicating in a serial connection manner, at least two sub-cavities include the first sub-cavity located in the downstream part of the air inlet direction and the second sub-cavity located in the upstream part of the air inlet direction, and the first sub-cavity only communicates with the second sub-cavity. The first sub-cavity is divided into a plurality of cavities isolated from one another in an airtight manner. Each cavity communicates with the air inlet pipe through the second sub-cavity. The air outlet pipe communicates with the second sub-cavity. According to the silencer, the cavities isolated from one another in the airtight manner can be used for eliminating the peak value of noise under multiple specific frequencies at the same time, and accordingly noise under the specific frequencies can be eliminated.

The harmful effects of tracking are reduced for a drill bit having roller cones with at least one of the outermost rows of active teeth containing one or more teeth having a height that does not extend to the height of at least one of the outermost rows on another roller cone on the bit. The crest on this tooth may have a length in a circumferential direction that is wider than an overall width of the tooth in the outer to inner direction. The invention may be used on any cutter row, not just the outermost row. The design may be used on a different roller cone or row, or more than one cutter row. The anti-tracking feature may be located between the leading and trailing edges of the tooth on one or more roller cones.

The present invention adds gain and phase into a canonical second order system in order to mitigate the adverse effects of unwanted resonance, where the gain is added to the forward path of a control loop of the system and is a ratio of the square of the system and mechanism frequencies, and the phase lead (H-factor) is added to the feedback path of the control loop of the system and is a complex ratio of these frequencies which includes a dc-component (Hdc) and a zero- or pole-component. By adding gain and phase lead, which is contrary to current approaches to addressing resonance, the present invention achieves the desired result of resonant free application in a canonical resonant-prone system of second order, and the methodology is applicable to higher order systems.

The invention discloses a sound attenuation clamping piece of an amorphous alloy transformer, and belongs to the technical field of a transformer clamping piece. The sound attenuation clamping piece comprises an upper clamping piece (1) and a lower clamping piece (2), wherein the lower clamping piece (2) is matched with the upper clamping piece (1), the upper clamping piece (1) comprises a cover plate (11), first sound attenuation array holes (111) and first installation holes (112) are formed in the cover plate(11), the lower clamping piece (2) comprises a lower bottom plate (21) and second sound attenuation array holes (211), and the second sound attenuation array holes (211) are formed in the lower bottom plate (21). In the sound attenuation clamping piece of the amorphous alloy transformer, the first sound attenuation array holes and the second sound attenuation array holes are respectively formed in the upper clamping piece and the lower clamping piece, the resonance of an iron core and a winding of the amorphous alloy transformer can be effectively damaged by the first sound attenuation array holes and the second sound attenuation array holes, so that the noise of the amorphous alloy transformer is reduced, and the noise pollution generated by the amorphous alloy transformer on a surrounding environment is reduced.

The seal assembly comprising a fixed element, a rotating element, and a seal member comprising a stiff annular reinforcement and a seal of an elastic material and in contact with a sliding surface. The sliding surface has an arithmetic mean roughness greater than or equal to 0.15 μm and less than 0.5 μm. The sliding surface has a roughness ratio greater than or equal to one. The roughness ratio is the ratio of a first parameter corresponding to a quantity of valleys to a second parameter corresponding to a quantity of peaks over the sliding surface.

The invention relates to a VOCS (Volatile Organic Compounds) waste gas treatment device, which is characterized by comprising an inlet section, a middle processing section and an outlet section, wherein the rear end of the inlet section is connected with the front end of the middle processing section; the rear end of the middle processing section is connected with the front end of the outlet section; the middle processing section comprises a first reaction chamber inlet pipeline (7), a second reaction chamber inlet pipeline (8), a reaction chamber, a first reaction chamber outlet pipeline (9), a second reaction chamber outlet pipeline (10) and an overheating outlet pipeline (11); the reaction chamber is internally provided with a first heat retainer (12), a first catalytic domain (13), a heating zone (14), a second catalytic domain (15) and a second heat retainer (16) which are arranged in leaner pattern; a closed cycle pipeline (25) is connected between the middle part of the outlet section and the middle part of the inlet section. The VOCS waste gas treatment device and a VOCS waste gas treatment method have the advantages of high treatment efficiency, peak value-eliminated emission and lower energy consumption.

The invention provides a signal modulating device which includes: an integrating circuit arranged to generate an integrated signal according to a scaled analog signal and a first feedback signal; a resonating circuit arranged to generate a resonating signal according to the integrated signal; a first signal converting circuit arranged to convert the resonating signal into a digital output signal; a second signal converting circuit arranged to convert the digital output signal into the first feedback signal; a first impedance circuit having a first terminal receiving an analog signal and a second terminal coupled to the resonating circuit for altering the location of zeros in the forward-path transfer function and consequently shaping the signal transfer function (STF) of the signal modulating device; and a second impedance circuit having a first terminal receiving the analog signal and a second terminal coupled to the integrating circuit for generating the scaled analog signal. By using the signal modulating device, the peaking in the STF can be effectively reduced or eliminated.

The invention discloses a digital peak clipping method and a digital peak clipping device, and belongs to the field of communication. The digital peak clipping method includes generating output noise signals according to amplitude values of carrier aggregation (CA) signals and a preset peak clipping threshold; acquiring frequency points, bandwidths and sampling rates of various first carrier signals in the CA signals; generating CA peak clipping coefficients according to the frequency points, the bandwidths and the sampling rates of the various first carrier signals and actuating filter processing for the CA peak clipping coefficients and the output noise signals to generate filtered and formed noise signals; and aligning the CA signals with the filtered and formed noise signals after the CA signals are delayed, and subtracting the filtered and formed noise signals from the delayed CA signals to generate peak clipping signals. The digital peak clipping method and the digital peak clipping device have the advantage of capability of reducing the peak clipping missing probability.

The invention discloses a load sensitive hydraulic control system, comprising a multipath directional control valve and a load sensitive pump having a load sensitive valve, wherein, a liquid inlet and an oil drain port of the multipath directional control valve are respectively communicated with a liquid outlet and an oil tank of the load sensitive pump, a load feedback port of the multipath directional control valve is communicated with a sensitive cavity of the load sensitive valve, and each uniting valve oil port of the multipath directional control valve is respectively connected with the corresponding executive component; the passage between the load feedback port of the multipath directional control valve and the sensitive cavity of the load sensitive valve is provided with a damper valve; the oil duct between an oil inlet and an oil outlet of the damper valve is provided with at least two dampings, and the oil duct between the adjacent two dampings is provided with a chamber having an enlarged cross section; and the oil outlet is communicated with the load feedback port of the multipath directional control valve, and the oil inlet is communicated with the sensitive cavity of the load sensitive valve. In addition, the invention provides a crane having the load sensitive hydraulic control system.

A constant velocity drive shaft of an automobile, including a left half shaft and a right half shaft, wherein the left end of the left half shaft is assembled with the left wheel through the left half shaft fixed joint, and the right end of the left half shaft is connected with the middle differential of the power transmission device through the left half shaft moving joint The left half shaft gear of the transmission is assembled, the left end of the right half shaft is assembled with the right side shaft gear of the differential in the power transmission device through the right half shaft movable joint, and the right end of the right half shaft is connected with the right wheel through the right half shaft fixed joint. Assembly, the right half shaft is a hollow shaft tube structure, the left half shaft is a solid rod shaft structure, the length of the right half shaft hollow shaft tube is X, the length of the left half shaft solid rod shaft is Y, X>Y, the right half shaft The shaft torsional stiffness is K right, the left half shaft torsional stiffness is K left, and K right = K left. The invention not only solves the deviation problem caused by the inconsistency of the torsion angles of the left and right axle shafts when the whole vehicle is running under dynamic load during acceleration, but also eliminates the resonance phenomenon caused by the different speed conditions of the engine, and improves the NVH performance and economic performance of the vehicle.

The invention discloses a reversely-rotating trowelling roller for a coated battery diaphragm output of a drying oven. The reversely-rotating trowelling roller comprises the drying oven, a coating mechanism arranged on the front side of the drying oven, a reverse trowelling mechanism installed on the back side of the drying oven and a take-up mechanism arranged on the back side of the reverse trowelling mechanism. A transmission belt is installed in the drying oven. A film is placed on the transmission belt. The reverse trowelling mechanism sequentially comprises a stainless steel roller guide roller, a first stainless steel guide roller group, a ceramic trowelling roller, a second stainless steel guide roller group and a rubber compression roller from front to back. According to the reversely-rotating trowelling roller for the coated battery diaphragm output of the drying oven, the ceramic trowelling roller is driven to rotate through a motor, the rotating direction of the ceramic trowelling roller is opposite to the motion direction of the film, a coating with undried glue is trowelled by utilizing rolling friction produced through relative motion, the film is not damaged, and the uniformity of the coating coated on the film can be ensured.

The invention belongs to the technical field of single phase direct-current brushless motors and in particular relates to a method for eliminating a peak value during the running of a single phase direct-current brushless motor. The method comprises the following steps of: arranging two HALL ICs (Integrated Circuits) at the periphery of a stator silicon steel sheet on a motor circuit board, wherein one HALL IC is positioned at the upmost end of the stator silicon steel sheet, and the other HALL IC is positioned at the second high-end of the stator silicon steel sheet, therefore, an angle difference is formed between the two HALL ICs; and releasing coil energy by utilizing the delay time formed by the angle difference and through discharge circuits arranged on the circuit board and connected with the two HALL ICs so as to eliminate the peak value in the single phase direct-current brushless motor. After the technical scheme is adopted, the delay time is formed through the angle difference between the two HALL ICs, and the coil energy is first released at the instant of magnetic pole switching by utilizing the DELAY time, therefore, the peak value during the running of the single phase direct-current brushless motor is eliminated, the interference noise is reduced, and meanwhile, the start shaking problem can also be solved.

Preparation method of graphene fast charging battery. The invention is used in batteries. Existing rechargeable batteries can only reach 50‑70% of the total battery capacity when charged in a low temperature environment. The invention includes: preparing the slurry required for coating the positive electrode sheet of the battery through the lithium manganate positive electrode, the binder and the conductive agent; preparing the slurry required for coating the negative electrode sheet of the battery through the conductive agent containing the conductive graphene slurry Homogenization of materials; coating of battery positive and negative electrodes, and leaving empty foils on both sides of the positive and negative electrodes; rolling and shearing of battery positive and negative electrodes; battery assembly; battery formation and post-treatment process. The invention realizes the fast charging performance of the lithium manganate-lithium titanate battery at normal temperature, while maintaining its rate performance and cycle performance.

The invention provides a timing synchronization method in a low-orbit satellite communication system. The timing synchronization method is characterized by comprising the following steps: selecting longest linear feedback shift register sequences to construct a training symbol, wherein the training symbol has two front and back reverse parts, the total length is N, the front half part N / 2 is reverse to the back half part N / 2, and meanwhile two parts N / 4 in each N / 2 part form conjugate antisymmetry; further improving a time domain structure of the training symbol, so that the time domain structure becomes a dual conjugate antisymmetry structure; and calculating the improved training symbol according to a timing synchronization measurement function to obtain a time domain measurement result. By adoption of the method, related peak values of timing positions can be eliminated, no platform effect is generated, and meanwhile the sidelobe phenomenon is also well inhibited.

The invention discloses a reverse direction troweling roller after the battery diaphragm is coated out of a drying box, including a drying box, a coating mechanism arranged on the front side of the drying box, and a reverse wiper installed on the lower rear side of the drying box. Leveling mechanism, and a winding mechanism arranged on the rear side of the reverse troweling mechanism; a conveyor belt is installed in the drying box; a film is placed on the conveyor belt; the reverse troweling mechanism is sequentially arranged from front to back Including stainless steel roller guide roller, first stainless steel guide roller group, ceramic smoothing roller, second stainless steel guide roller group and rubber pressure roller. After the battery diaphragm of the present invention is coated out of the drying box, it is reversed to the smoothing roller, and the ceramic smoothing roller is driven by a motor to rotate, and the direction of rotation is set to be opposite to the direction of motion of the film. The coating is smoothed without damaging the film, and it can ensure the uniformity of the film coating.