111results about How to "Avoid miscalculations" patented technology

A wireless communication apparatus compensates for phase and amplitude imbalances existing among transmit and receive branches, while also preventing likelihood information and SNR estimation error produced by such imbalance compensation. In an apparatus having a plurality of transmit and receive antennas and respective branches for each antenna, a calibration processor multiplies receive signals in each receive branch by antenna calibration coefficients, in order to correct phase and amplitude imbalances existing among the receive branches. A transmit beamforming matrix estimator then estimates a transmit beamforming matrix by using the multiplied receive signals. An estimator then solves for estimated values such as the noise power, likelihood information, and channel waveform equalization values for each receive branch, and in addition, derives a final estimated value that takes the multiplication by correction coefficients into account when averaging the estimated values for each receive branch or when computing a weighted average according to likelihood.

The present invention provides a DC brush motor rotation amount detection method comprising the steps of: counting pulses generated by switching of brushes when a DC brush motor rotates; removing any noise pulse generated during a pulse rejection period which is shorter than a pulse interval and which is started when each pulse is generated; counting pulses generated during pulse acceptance periods outside the pulse rejection periods; and detecting a rotation amount of the DC brush motor, wherein the pulse rejection period during steady-state operation of the DC brush motor is ended when a predetermined time elapses from a start point of the pulse rejection period, where the predetermined time is calculated by multiplying a pulse interval of a corresponding pulse zone one rotation before a pulse zone to which the pulse rejection period belongs by a coefficient K(½<K<1).

An autonomous mobile device that moves while autonomously avoiding zones into which entry should be avoided even if no obstacle exists therein includes a laser range finder that acquires peripheral obstacle information, a storage unit that stores an environment map that shows an obstacle zone where an obstacle exists, and a no-entry zone map which shows a no-entry zone into which entry is prohibited, a self-location estimation unit that estimates the self-location of a host device by using the obstacle information acquired by the laser range finder and the environment map, and a travel control unit that controls the host device to autonomously travel to the destination by avoiding the obstacle zone and the no-entry zone based on the estimated self-location, the environment map, and the no-entry zone map.

The invention discloses a self-locking control method for controlling road network traffic through urban signal lamps, which comprises the following steps: (1) determining a controlled zone boundary; (2) constructing a control matrix gij(k) according to the conditions of signal lamps at each intersection of the controlled zone boundary to be used as a split ratio matrix of signal phases entering the controlled zone; setting the optimal accumulated number of vehicles in the controlled zone as M, and determining the minimum value and the maximum value of the split ratio matrix of the phases at each intersection in the controlled zone according to the shortest crossing time of pedestrians and the allowed maximum queue length at each intersection; and (3) if X(k) is less than M, setting the signal lamps at each intersection of the controlled zone boundary according to MAX gij(k)=gij, and if X(k) is greater than M, setting the signal lamps at each intersection of the controlled zone boundary according to MIN gij(k)=gij, thereby realizing the self-locking control of the road network traffic through urban signal lamps. By controlling based on observation, the invention can effectively prevent the supersaturated traffic state and traffic deadlock of the road network.

A method for rapidly and accurately dispensing a predetermined number of discrete items, the method comprising: operating a conveyor to transport multiple items towards an imaging device, wherein the items are arranged in a single layer and at least some of the items are transported in parallel; operating the imaging device to continuously capture images of an area immediately below an end of the conveyor, so that items falling off the conveyor are recorded in the images while in trajectory; processing the images in real time, to continuously determine the number of falling items; stopping the conveyor before the number of falling items has reached the predetermined number, while continuing to determine the number of falling items until items cease to fall off the conveyor innertially; and automatically dispensing an additional amount of items, to complete the predetermined number of items.

Systems and methods are disclosed for utilizing digital aerial images to determine stockpile volumes. In particular, in one or more embodiments, the disclosed systems and methods utilize a UAV to capture a plurality of digital aerial images portraying stockpiles on a site. The disclosed systems and methods can generate a two-dimensional representation of the site and a three-dimensional representation of the site based on the plurality of digital aerial images. Moreover, the disclosed systems and methods can apply an elevation filter to the three-dimensional representation of the site to identify potential stockpiles. Further, the disclosed systems and methods can utilize a neural network to analyze two-dimensional features and three-dimensional features of the potential stockpiles to identify final stockpiles. The disclosed systems and methods can then utilize three-dimensional stockpile representations to determine stockpile volumes.

A method is disclosed for operating a counting digital X-ray image detector. Each pixel element and/or each pixel cluster is embodied as switchable between a first counting mode and a second counting mode that is different from the first. An at least first count of the number and/or energy of the events in an at least first time interval is performed for each pixel element or each pixel cluster in the first counting mode. An evaluation of the at least first count of the number and/or energy of the events is performed in an evaluation unit of the X-ray image detector. A switchover to the second counting mode is performed as a function of the number and/or energy of the events, and a second count of the number and/or energy of events counted within an at least second time interval is performed in the chosen second counting mode.

The present invention is a pill dispensing method and apparatus wherein a first rotor rotates pills about a rotation axis along a first part of a spiral path at a first rotational speed whereupon the pills move spirally away from the rotation axis. A second rotor receives the pills from the first rotor and rotates the pills about the rotation axis along a second part of the spiral path at a second, greater rotational speed whereupon the pills move spirally away from the rotation axis toward a discharge chute which dispenses the pills into a pill bottle or a storage container. A counter can be provided for counting pills that exit the discharge chute or opening.

The invention relates to a virtual viewpoint video quality evaluation method. According to the invention, time domain blink distortion of virtual viewpoint video is calculated by taking all pixels in a space-time domain unit as a unit, so that erroneous estimation which is brought about by a pixel-to-pixel time domain blink distortion calculation mode for virtual viewpoint video human eye perception distortion is avoided. The virtual viewpoint video quality evaluation method not only considers distortion brought about by a depth image error but also considers distortion introduced by left and right viewpoint texture images when performing calculation on the time domain blink distortion of the virtual viewpoint video. The virtual viewpoint video quality evaluation method can effectively evaluate the time domain blink distortion which imposes great influences on the subjective quality in the virtual viewpoint video, thereby more conforming to a result of human eye subjective perception when the virtual viewpoint video quality is evaluated, and enabling virtual viewpoint video quality evaluation to be more accurate and more comprehensive.

The self-making bread method includes: weighing a certain amount of ingredients according to a bread recipe and placing them in a bread ingredient box; putting the bread ingredient box into the corresponding containing region of the top portion of the bread machine; using the jagged ring of the bottom portion of said containing region to open the thin film of the bottom portion of the bread ingredient box, so the ingredients will fall into the mixing container in the bread machine; controlling the water delivering mechanism inside the bread machine to deliver a certain amount of water into said mixing container; starting the mixing device inside the bread machine, which mixes the ingredients into an appropriate dough; turning off the mixing device; energizing the electric heating tube in the bread machine, to bake the dough inside the mixing container into bread.

The invention relates to a method for controlling power supply system featuring complementation of solar energy and fuel energy. In the method, a controller collects input electric current of a solar energy power supply device, charge-discharge electric current of storage batteries and load current of a loading equipment; when the input electric current is less than 1.5 times of load current, the system enters an oil engine auxiliary power supply mode; in the oil engine auxiliary power supply mode, the controller reads the current status of the storage batteries and the current status of the oil engine power supply device and starts up or closes the oil engine power supply device according to certain logic; in the technical proposal of the invention, solar energy power supply mode serves as the main power supply mode, as a result, the solar energy can be fully utilized, requirements for environmental protection are met, the input electric current of a solar panel and the load current of the load device can be monitored in real time; in addition, the oil engine can be started up to supply power when the solar energy power supply device can not supply enough power, thus entering the oil engine auxiliary power supply mode and realizing continuous power supply, improving utilization efficiency of the oil engine and lengthening service life of the storage batteries, strengthening reliability of the power supply system while meeting the requirements on energy conservation and reduction of consumption.

A position sensor for determining the position of an object, comprising at least one sensing element to transduce a time-varying external signal into an electrical signal; at least one comparator circuit adapted to perform a thresholding operation on the electrical signal being characterized by a hysteresis curve; the position sensor is adapted to provide information relating to the last crossed to store it at least while the position sensor is in an inactive mode and to restore the information to obtain a selected threshold when it is switched from inactive to active mode; and configured such that a transition in an output signal is generated by the thresholding operation if the selected threshold is crossed by the electrical signal and configured to change the selected threshold after it was crossed by the electrical signal.

The invention discloses a urea box fault diagnosis method and device, a vehicle and a storage medium. The method comprises the steps that when the water heating valve of a urea box normally works, theinitial urea box temperature of the urea box in the heating state is obtained through a urea box temperature sensor; when the urea box meets a preset dynamic fault judgment condition, the current temperature of the urea box at the current moment is obtained; and a urea box temperature sensor fault detection result of the urea box is determined according to the initial urea box temperature and thecurrent urea box temperature. According to the technical scheme, the problems that the state of the urea box temperature sensor cannot be monitored in real time, urea state estimation errors are caused by sensor faults or the urea temperature is excessively high due to too long heating time are solved, the accuracy of urea box temperature control is improved and the emission performance of the vehicle is improved.

A sphere tree is first generated. Accessibility values and occlusion angles corresponding to each vertex of a 3D object are calculated according to the sphere tree. A 2D texture and a 3D texture are then generated to store the accessibility values and occlusion angles. When a self-shadow effect of the 3D object is required to be generated, the relation of the spheres in the sphere tree is updated, and a 3D image is formed by retrieving the values in the 2D texture and the 3D texture according to the updated sphere tree. Since the 2D texture and the 3D texture are pre-stored, the real time calculation load is hugely reduced while the self-shadow effect is processed.

The invention discloses a block sparse signal reconstruction method based on greedy iteration. All components contained in a block sparse signal are reconstructed from the point of view of geometric projection, and a produced estimated signal is corrected repeatedly in a backtracking check mode to ensure a high reconstruction probability. In the specific implementation process of the block sparse signal reconstruction method, the reconstruction process is divided into a plurality of stages; the signal sparsity is approximated stage by stage; partial signal components will be estimated at each stage until the correct sparsity is estimated; multiple iterations will be performed at each stage; the neighborhood points of all the current estimated values are analyzed based on the characteristic of segmental continuous distribution of non-zero elements of the block sparse signal, and therefore, the position of the block is located and the purpose of reconstruction is achieved.

A frequency modulation radar apparatus for vehicle use can suppress the influence of noise to avoid incorrect estimation due to noise thereby to provide a beat frequency with high accuracy and at high speed without increasing the frequency resolution of the beat frequency that causes an increase in an observation time. The apparatus includes a frequency correction section that calculates a corrected frequency (f_n+δ) by adding an amount of frequency correction (δ) to the frequency (f_n) of a peak signal, and a CPU that calculates a distance or a relative speed to a target object based on the corrected frequency (f_n+δ). In an FFT calculation section, the frequency (f_t) of the true peak signal is calculated based on the characteristic of a window function, and if the frequency (f_t) thus calculated is determined as an incorrect estimation, the frequency of the true peak signal is further corrected.

The embodiment of the invention provides a pulse waveform amplitude variation analysis method and device. The method comprises the steps that pulse waveform and the number of the jump edges of the pulse waveform are acquired; the size of a first window is determined so that the number of the jump edges searched in the pulse waveform according to the first window is enabled to be equal to the number of the jump edges of the pulse waveform inputted by the user; the first window is slid on the pulse waveform, and the position of the jump edges in the pulse waveform and the start point coordinates and the end point coordinates of the jump edges are determined; and statistical analysis is performed on the signal amplitude variation of the pulse waveform within the unit period of time according to the start point coordinates and the end point coordinates of the jump edges in the pulse waveform. According to the pulse waveform amplitude variation analysis method and device, the accuracy of pulse waveform analysis can be enhanced.

A radio communication device which when transmitting both a first information sequence, on which π/4-shift differential phase shift modulation is performed, as a delayed wave and a second information sequence, on which a differential phase shift modulation is performed, as an advance wave by using a PADM method, interchanges signal points respectively belonging to quadrants which are one of a first quadrant and a third quadrant, a second quadrant and a fourth quadrant, the first quadrant and the second quadrant, the first quadrant and the fourth quadrant, the second quadrant and the third quadrant, and the third quadrant and the fourth quadrant, the signal points being included in signal points mapped onto a complex plane which consists of a real number axis and an imaginary number axis, to change the arrangement of the information sequence.