52results about How to "Improve monotonicity" patented technology

A programmable gain amplifier with three stages uses fine steps, has a large gain range, and is monotonic. The first stage comprises several amplifiers, each including a resistive feedback loop. The feedback loop comprises a series of resistors, with each resistor acting as a tap. Since the number of resistors in the loop is unchanging, monotonicity and stability is guaranteed when resistance is increased using successive taps. A switch system connects two taps at a time to an interpolation stage. Each of these taps corresponds to a specific resistor level, and thus a gain level. The interpolation stage uses a plurality of current sources inside a feedback amplifier to control the interpolation, in order to provide fine gain steps.

The invention discloses a distributed storage control method based on a virtual ring load balancing algorithm. By introducing a consistent hashing algorithm, the change of the number of data items caused by increased nodes can be reduced, and the monotonicity can be improved; and by introducing a virtual ring and a historical modulus table, the problem of data movement caused by the change of the number of storage nodes can be avoided. According to the method disclosed by the invention, the impact of the storage medium size on data mapping can be eliminated, and good redundancy characteristics and high scalability of the cloud storage capacity can be achieved on the basis of ensuring load balancing.

A digitally controlled analog circuit comprises a finite state machine configured for receiving a digital input word and generating at least two digital codes in a manner determined by a state of the finite state machine. The digital codes are decoded into respective sets of binary data. The sets of binary data control respective switched-circuit arrays to generate an analog output corresponding to the digital input word. To establish a monotonic function between the digital input word and the analog output during steady state operations, the finite state machine switches states when a wrap-around condition is detected for one of the digital codes. The finite state machine uses different sets of equations in different states to derive the digital codes.

To increase the accuracy and resolution of an m bit digital analog converter, n bit input values with n>m are fed to a control circuit and converted to a series of control values for the digital analog converter using dithering techniques. When the series of control values straddles a major transition where a large number of bits are switched between 1 and 0, a corrected series of control values is retrieved from a calibration table. The corrected series takes into account the glitch effects observed at the output of digital analog converter at a major transition.

The invention relates to a full-reference image-based objective quality evaluation method. The method comprises the following steps: (1) acquiring image signals sr of reference images r in an image library and image signals sd of distorted images of different distortion types corresponding to the image signals s; (2) calculating an Euclidean distance DLLM between each reference image and distorted image extraction vector according to the acquired sr and sd; (3) calculating according to the Euclidean distance DLLM to obtain a primary objective evaluation score MLLM; (4) calculating the primary objective evaluation scores MLLM of a plurality of distorted images of different distortion types in the image library and objective evaluation scores thereof, and drawing a scoring scatter diagram; (5) establishing a reference line in the scoring scatter diagram, and calculating an adjustment value offset (xk) of the image of each distortion type; (6) adjusting to obtain the final objective evaluation score new (x1k) of the to-be-evaluated image. Compared with the prior art, the method has the advantages of high consistency in human eye subjective evaluation score, effectiveness to various distortion types, good fitting curve continuity and the like.

The invention discloses a harmful particle detection method before clinical use of an injection. The harmful particle detection method comprises an early-stage preparation step, a water feeding and draining step, a preparation detecting step and a detection step. The detection step comprises the following specific steps: controlling an ultrasonic transducer and a detection ultrasonic transducer to respectively transmit pulse ultrasonic waves according to the reference frequency f0, the frequency of 1.5f0 and the frequency of 0.75f0 by using a microprocessor, respectively recording the three scattering echo measuring values and overlapping the three scattering echo measuring values to obtain comparison scattering sound pressure V0 and scattering sound pressure V1 to be detected; obtaining a harmful particle detection result of information of particle sizes in relevant detection regions are longer or shorter relative to standard particles with 50 Mum particle size each and the like according to a ratio, namely k*V1 / V0 by the microprocessor; and meanwhile, displaying the result through a touch screen and carrying out sound-light alarming. According to the technical scheme, due to the adoption of a triple media ultrasonic back scattering and centrifugal sedimentation technology, harmful particle detection with non contact, non intrusion, non destructiveness and measurement error correcting function can be realized, and is simple in operation and feasibility.

The invention provides a method and device for adjusting the face of a virtual character in a game, electronic equipment and a computer readable storage medium, and belongs to the technical field of human-computer interaction. The method is applied to a mobile terminal and characterized in that the mobile terminal comprises a touch sensor, and the touch sensor is used for detecting a touch operation received by a bezel of the mobile terminal. The method comprises the steps of determining a to-be-adjusted target part of the face of the virtual character; adjusting the target part according to the operation force of a pressing operation in response to the pressing operation which is detected by the touch sensor and acts on the bezel. By means of the method and device for adjusting the face of the virtual character in the game, the electronic equipment and the computer readable storage medium, the interaction feedback feeling of the virtual character for the adjusting process can be improved, and diverse use experience is brought to a user.

The invention provides a method for preprocessing a vibration signal of a mechanical component with a missing value. The method comprises the following steps: the step 1, calculating a root-mean-square of an original vibration signal by using a feature extraction method; the step 2, establishing an exponential stochastic regression model, and estimating model parameters; the step 3, interpolating a root mean square missing value of the vibration signal based on Monte Carlo simulation; the step 4, interpolating the missing value of the original vibration signal; and the step 5, carrying out quality analysis on the vibration data of the mechanical component. According to the method, the integrity and authenticity of original data are guaranteed, the process fo the method has low calculation requirements on model parameters, iterative calculation is not needed, parameter estimation has an analytical expression, the calculation efficiency is high, the method is scientific, the manufacturability is good, and the method has wide popularization and application value.

The invention provides a voice recognition method and device, equipment and a storage medium. The method comprises the following steps: acquiring a coding feature obtained by coding an acoustic feature of a to-be-recognized voice by a coder; wherein the encoder is obtained according to a first recognition result of a voice sample and text label training of the voice sample, and the first recognition result of the voice sample is obtained according to encoding features obtained by encoding acoustic features of the voice sample by the encoder; determining the attention coefficient of the recognition result of the voice sample on the coding feature of each frame output by the encoder; and determining a voice recognition result of the to-be-recognized voice according to the coding features of the to-be-recognized voice. According to the technical scheme, the speech recognition accuracy can be improved.

The invention discloses a turbine engine performance degradation evaluation method based on a stacked-denoising auto-encoder, and belongs to the technical field of engine performance degradation evaluation. The turbine engine performance degradation evaluation method solves the problems that traditional multi-sensor data selection needs to rely on complex information evaluation criteria, extraction of degraded features in HI construction depends on a large number of signal processing techniques and expert experience, supervised training method label selection relies on manual participation, and a method is low in universality. Four denoising auto-encoders build stacked-denoising auto-encoders to extract the single node value of input data. Training set data carries out pre-training to thenetwork and uses a BP algorithm to fine-tune parameters. The extracted single node value is considered to be the health factor value at each cycle, and an HI curve of a training set is established. The test set is input to the trained stacked-denoising auto-encoder to obtain the health factor value at each cycle and construction an HI curve. The HI curves of training set and test set are subjectedto smoothing processing respectively, and the HI curves after smoothing processing are evaluated.

The invention discloses design and a method of domain layout of a 14-bit integrated circuit DAC (Digital to Analog Converter) current source array. In the design of the domain layout of the 14-bit integrated circuit DAC (Digital To Analog Converter) current source array, a main array formed by orderly arranging a plurality of current source is comprised; the main array is divided into four main quadrants by a vertical centerline and a horizontal centerline; the current source arrays of the four main quadrants are arranged in a star-like symmetrical manner based on a center; each main quadrant is divided into four auxiliary quadrants by a vertical centerline and a horizontal centerline, and four auxiliary quadrants are arranged in a star-like symmetrical manner based on a center. Specifically, a two-layer tree-like structure is adopted, bidimentional two-step symmetrical layout is achieved, layers are relatively independent, and quadrants are relatively independent; when number input codes are increased from full 0 to full 1 and the current sources are sequentially opened, the structure can well eliminate gradient error, symmetry error and immediate technology error and has good heat-resistant gradient effect. The design has the characteristics of good monotonicity, offset error, differential and integral linearity, spurious-free dynamic range and signal to noise ratio.

The invention discloses an oily hair wax containing Chinese herbal medicines and a preparation method of the oily hair wax, and belongs to the technical field of cosmetics. The oily hair wax comprises the following components in parts by weight: 30-40 parts of lignite wax, 8-10 parts of a hexadecanol and octadecanol mixture, 8-15 parts of stearin, 10-15 parts of a propolis oil solution, 3-7 parts of an opacifying agent Op301, 10-15 parts of glycerin, 10-13 parts of an angelica sinensis extract, 8-10 parts of a ginseng extract, 10-15 parts of a radix rehmanniae recen extract, 15-20 parts of a polygonum multiflorum extract, 5-8 parts of a salviae miltiorrhizae extract, 3-5 parts of a sesame extract, 10-15 parts of a walnut extract, 15-20 parts of a mint extract, 3-5 parts of an essence and 10-15 parts of deionized water. The oily hair wax disclosed by the invention is capable of nourishing hair roots, has a significant improvement effect on the symptoms such as insomnia and dreaminess, pain in the waist and back, deficiency body and amnesia after being used for a long period of time, and meets the urgent requirements of the public on the hair wax with nutrition and herbal nourishment effects at present.

The present invention provides a wireless positioning method and system, wherein the method includes: 1) when a terminal exchanges data with a wireless base station, the terminal or the wireless base station collects the actual data receiving rate of the data exchange; 2) ) executing a positioning algorithm according to the received data reception rate. Based on the solution of the present invention, there is no need to specially set up hardware devices such as GPS, and it is not necessary to deploy a large number of dedicated hardware for wireless positioning in the environment. The present invention realizes the positioning based on the data receiving rate, does not need to communicate separately for the positioning, and the data receiving rate can match with any existing wireless positioning algorithm, and can obtain a better effect than using signal strength in certain environmental conditions .

The invention provides a 10-bit high-precision digital-to-analog converter (DAC) current source array and a layout method thereof. Firstly a mirror image to be rotated is generated for replacing a 16*16 sub-array Z to be converted, and the 16*16 sub-arrays are respectively obtained by multiple times of conversion and then are further composed into a final array. According to the layout method of the invention, matching of high and low current sources in the DAC current source array can be improved, integral non-linearity (INL) and differential non-linearity (DNL) characteristics of the DAC can be reduced, and a chip area is further reduced, and the space is saved; a current mirror can copy the current more accurately; and furthermore, a stray capacitance value can also be reduced, and surges generated during conversion between an MSB and an LSB can be effectively reduced. The layout of the same center of gravity adopted by the invention can be effectively improved, the influence of a ladder degree error can be counteracted, and mismatching of the current source array caused by systematic errors and random errors can be reduced while high conversion precision and high speed are ensured, so that the DAC circuit has better performance.