83 results about "Negative deviation" patented technology

System and method for image improvement comprising providing a series of frames; summing pixel values to obtain frame intensity; computing average frame intensity; determining frame intensity deviation for each frame by subtracting average frame intensity from frame intensity; determining an array of average pixel values (AAPV) and subtracting AAPV from the pixel value arrays to determine positive or negative pixel deviation values; grouping frames in first or second groups depending positive or negative frame intensity deviation; selecting all pixel values having a positive or negative deviation value and creating subgroups of positive or negative pixel deviation value frames, multiplying the pixel deviation value frames in each subgroup by frame intensity deviation to create first product arrays, which are summed together and divided by total number of frames to obtain second product arrays for each subgroup; selecting one or more of second product arrays to generate an image.

A computer program product and method for sales forecasting and adjusting a sales forecast for an enterprise in a configurable region having one or more clusters of stores. The method includes periodically receiving a sales forecast for an enterprise over a configurable period of time, periodically receiving actual sales information, sales anomalies and anticipated events within the at least one of the clusters of stores over a computer network, determining positive and negative deviations from the anticipated sales of the sales forecast based on the sales information, determining whether one or more trends are occurring or have occurred using a pre-defined mathematical expression based on the sales information, the positive and negative deviations, and the sales anomalies, adjusting the anticipated sales of the sales forecast based on the sales anomalies, the trends and the anticipated events, and outputting the adjusted sales forecast to a user. The sales forecast includes anticipated sales for a plurality of items within at least one of the clusters of stores.

The present invention relates to a PID control method of applying variation trend of a controlled variable. The method selects the appropriate positive and negative deviation values according to the variation rate of the controlled variable, when the controlled variable varies between a set value and a negative deviation value and is located during a rising process or the controlled variable varies between the set value and a positive deviation value and is located during a falling process, the valve location of an adjusting valve does not vary, and the adjusting valve adjusts according to a conventional PID control technology at other time. By utilizing the method of the present invention to adjust and control the controlled variable, the overshoot times and the amplitude can be reduced, the lag time is shortened, a tracking effect of the controlled variable is improved obviously, and the control precision and the gentle degree can be improved by more than 50%, at the same time, the frequent action time of an execution mechanism, for example, the adjusting valve is also reduced, and the usage time of a device is prolonged.

The invention relates to a linear interpolation method, belonging to the filed of computer numerical control. As to a linear interpolator with an impulse divider, since the real values of the frequency dividing coefficients of the divider must be integrals, the real values deviate from ideal values, resulting in deviation of the output impulse of the interpolator. In order to reduce the deviation, the frequency dividing coefficients of the divider is divided into two classes of different integrals, wherein one class of frequency dividing coefficients has a negative deviation value, and the other class of frequency dividing coefficients has a positive value, so that the output deviation of the two class are cancelled. The method is a solution for a linear interpolator based on the combination of software and hardware of a computer, which is simple and reliable, highly precise, meet the requirements of fast interpolation, and realizes multi-coordinate-axis linkage control.

The invention discloses a distribution circuit voltage overdeviation protector, which comprises a voltage sampling rectification power supply (1), step-down voltage regulation rectification circuit (2), a voltage sampling circuit (3), an overdeviation voltage processor (4) and a cut-off circuit (5) of the distribution circuit of the voltage overdeviation. The protector can cut off the distribution circuit according to the set overdeviation voltage in the distribution circuit and the persistent time; in the voltage sampling circuit (3), the voltage of the stabilized voltage supply output by the step-down voltage regulation rectification circuit replaces the rated working voltage of the AC power supply and the voltage of the voltage sampling rectification power supply replaces the working voltage under various states of the distribution circuit to carry out subtraction and make the invention suitable for the protection of the line voltage and the HV distribution circuit and not limited by the electrical load capacity. The protector is arranged with a positive and negative deviation overdeviation voltage recording device, so the invention can monitor the quality of the power supply of the distribution circuit.

The invention relates to a coalition method for reducing the cost of deviation assessment in medium and long-term power market for power distribution companies. The method comprises the steps of calculating the cooperation cost of the deviation assessment alliance of the power selling company; calculating the alliance income of the power-selling companies considering the cooperation cost under thetypical medium and long-term market deviation electricity quantity assessment mechanism; carrying out the quantitative evaluation of marginal revenue contribution, contract execution bias, alliance dependence and alliance structure importance; using entropy weight-analytic hierarchy process (AHP) to measure the relative importance of each index and calculate the distribution of alliance income; calculating the comprehensive utility of profit expectation and risk loss of power company; constructing and solving the alliance optimization model aiming at maximizing the overall comprehensive utility of the alliance. The method of the invention can effectively reduce the deviation assessment cost and reduce the market operation risk of the power selling company by increasing the power quantityfree of assessment and offsetting the positive and negative deviations, and the like, and has good economic efficiency and practical application value.

The invention discloses an installation device for an offshore wind generating set. The installation device comprises a positioning mechanism, a fan, a six-dimensional parallel mechanism, a tower pedestal platform and a crane ship; the six-dimensional parallel mechanism is fixed on the tower pedestal platform through the positioning mechanism; the fan penetrates through the six-dimensional parallel mechanism and is fixed through the six-dimensional parallel mechanism; and the crane ship is connected with a fixing mechanism. The six-dimensional parallel mechanism with three working units is adopted in the installation device and does not have a working dead angle, so that deflection of positive deviation and negative deviation of a fan tower cylinder can be realized, and bolt holes in a bolt hole cylinder tower pedestal on fan tower cylinder flanges are quickly aligned. The six-dimensional parallel mechanism can play a role in buffering when the fan tower cylinder declines, so that collision impact between the fan tower cylinder and the tower pedestal is reduced. The six-dimensional parallel mechanism has a series of advantages of high rigidity, high speed, high bearing capacity, small errors, high precision, good power performance and the like and is easy to control, so that positioning and buffering integration of the fan tower cylinder can be realized, and the manufacturing cost is greatly reduced.

The present invention provides an active equalization architecture and method for a battery management system. The active equalization architecture for the battery management system includes a batterypack cluster including a plurality of battery packs connected in series, a plurality of battery management units correspondingly connected to the battery packs one by one, a battery pack control unitwhich is connected to the battery management units which are connected to the battery packs in the same battery pack cluster, and a battery cluster control unit which is connected to the battery packcontrol unit and the battery pack cluster. The active equalization method for the battery management system includes the steps of (S1) obtaining cell voltage values of batteries in the battery pack and performing intra-pack equalization according to a preset rule, and (S2) calculating a cell average value of the entire battery pack cluster, comparing cells with a highest positive deviation and ahighest negative deviation, and performing inter-pack equalization if a difference value exceeds a second value. According to the invention, the consistency of thousands of batteries in an operating environment in a container can be ensured, and therefore, the discharge capacity of an entire container energy storage system is increased.

Methods, systems and computer readable media for statistically analyzing apparent anomalies in CGH data, wherein the CGH data is ordered corresponding to locations of matter on chromosomes from which the CGH data was derived. A set of CGH ratio values is considered and Z-score values are computed for each CGH ratio value. The Z-score values are classified based upon a predetermined cutoff value. The number of Z-scores that are greater than the predetermined cutoff value are counted, the number of Z-scores that are less than a negative of the predetermined cutoff value are counted, and the total number of Z-scores are counted. A subset of the set of CGH ratios are considered, being defined by a window of predetermined size. A secondary Z-score is computed to measure the significance of at least one of overabundance and underabundance of at least one of significant positive deviations and significant negative deviations in the subset.

The invention relates to an asynchronous roller alternating control method for band steel hot rolling downstream rack working rollers. After a rolled piece is rolled, upper and lower working rollers horizontally move at the same distance in an opposite direction, then a next rolled piece is rolled, and the upper and lower working rollers periodically alternate to and fro between forward and reverse maximum roller alternating stroke positions in a band steel rolling production process, so that phasic positive and negative deviation is respectively performed on previous three downstream racks onthe basis of the same roller alternating function, and asynchronous roller alternation is formed on the three racks. According to the roller alternating control method, on one hand, the control ability on wedge and deviation is increased through asynchronous phasic adjustment, and on the other hand, the bad influence caused by multi-rack roller alternating zero-position superposition in the wholeroller alternating cycle can be avoided, so that the control stability of all strip-shape indices is increased, and the rolling kilometer is extended.

The invention relates to a wind electricity power prediction error evaluation method in consideration of a load level and wind speed segments. The wind electricity power prediction error evaluation method in consideration of a load level and wind speed segments includes: performing data processing on a wind electricity power prediction result reported by a wind farm according to a set data processing method; calculating wind electricity power evaluation indexes according to the wind electricity power prediction result, wherein the wind electricity power evaluation indexes include an accuracy rate, a qualification rate, a reporting rate, a correlation coefficient, a load peak positive deviation rate, a load valley negative deviation rate, a high-speed segment prediction accuracy rate and low-speed segment prediction accuracy rate; according to the wind electricity power evaluation indexes and index weights corresponding to respective wind electricity power evaluation indexes, calculating a comprehensive evaluation parameter of the wind electricity power prediction result; and evaluating the wind electricity power prediction error of the wind farm according to the comprehensive evaluation parameter. The method can realize the comprehensive evaluation of the wind electricity power prediction result and improves corresponding evaluation accuracy.

The invention discloses a concrete reinforcement cover pre-detection tool for a beam, a column and a wall, comprising a plate A, wherein the center of the plate A is vertically connected with an operation rod, the width of plate A is M-P, wherein, M shows the nominal thickness of the cover, P is the maximum allowable negative deviation of nominal thickness of the cover. The tool further comprises a plate B, the center of plate B is vertically connected with the other end of the operation rod; the width of the plate B is M+Q, M is the same as that of plate A; and Q is the maximum allowable deviation of the nominal thickness of the cover. The beam with 50mm of design thickness of cover is taken as example, after binding the reinforcement, 43mm of plate A extends between the outer edge of the reinforcement and the template to conduct detection. The part, through which plate A can pass,is qualified. If plate A cannot pass through, the reinforcement has small cover, the plate B is detected by 60mm wide of plate B, and if the plate B can pass, the reinforcement has great cover. The tool can detect whether the concrete reinforcement cover of beam, column and wall conforms to the design requirement or not quickly, and the tool has the features of simple structure and convenient operation.

This invention discloses a P-RACH open-loop power control method in the TDD system including: a base station gets the expected receiving power of the UpPCH from a radio network controller to test its actual receiving power of user terminal UpPCH, compensating the P-RACH expected receiving power of said user terminal based on the difference of the expeted and actual receiving power. This invention also discloses a base station using said method and can modify the user terminals with open power control at the positive deviation and negative deviation suitably.

The invention relates to the field of thermal control and automation and discloses a method and device for disequilibrium deviation control and an automatic control system for a thermal power plant. The method for disequilibrium deviation control comprises the steps of calculating deviation of a measured value and a set value of a measured object; calculating a change rate of the measured value; and adjusting the set value according to the deviation and the change rate, so that positive deviation and negative deviation of the set value are different. According to the method and device for disequilibrium deviation control and the automatic control system for the thermal power plant, the effect of non-linear conversion of a deviation value of the automatic control system is achieved, values of the positive deviation and the negative deviation entering a regulator of the automatic control system are different, and thus the requirements on different positive deviation and negative deviation overshoots of the automatic control system are met.

The invention discloses a guide method for online negative deviation control in a steel machining process. The guide method comprises the following steps: arranging loops among all finishing mills, so as to ensure that metal flow is stored among the finished mills, and the loops can be normally opened, delayed and stabilized; constructing a negative deviation control model f(x), setting a sampling interval, and integrating the negative deviation control model f(x) and the sampling interval into a PLC; before steel rolling, averaging the loop adjusting amount of the to-be-rolled steel in a weighted manner by adopting the negative deviation control model f(x), and averaging the loop adjusting amount of the rolled steel after the steel rolling; and performing subtraction on two groups of obtained numerical values by adopting the PLC to obtain the variation delta f of negative deviation, recording the variation delta f of negative deviation into a human-computer interface, and displaying the variation delta f of negative deviation through a site screen, so that the online negative deviation control can be completed by an operator according to the information displayed on the site screen. According to the guide method disclosed by the invention, the operator is guided to complete the online negative deviation control by utilizing the variation of the timely loop adjusting amount, and the guide method has the advantages of being high in control precision, and timely and convenient in guidance.

The invention belongs to the field of electric power system dispatching, and discloses a water-fire-electricity system trans-provincial peak-regulating load distribution method. According to the water-fire-electricity system trans-provincial peak-regulating load distribution method, the method is based on the characteristics of load changes of a plurality of provincial level power grids, a load sequencing strategy is brought in, and each power grid load sequencing position of time frames serves as heuristic information to conduct force output distribution. According to the technical scheme of the water-fire-electricity system trans-provincial peak-regulating load distribution method, the initial electricity receiving and force output process of each power grid is acquired through successive load shedding, output force of the time frames corresponding to all grids is accumulated, a time frame set going against the power station electric power balance limit is confirmed; as to any output force positive deviation time frame, a power grid with the maximum surplus load order position value is searched, the power output force of the grid at the time frame is further reduced, and meanwhile a negative deviation time frame with the maximum surplus load value is confirmed; the output force of the time frame is increased according to the same amplitude, and the force output process is repeated until all time frames satisfy the electric power balance limit. According to the water-fire-electricity system trans-provincial peak-regulating load distribution method, a target function does not need to built, the amount of optimizing calculation is substantially reduced, an optimizing result satisfying actual engineering requirements can be fast acquired, and the method is achievable, and has important theoretical and practical significance in regulating and controlling large power grid electricity resource distribution and relieving increasingly-serious power peak regulation pressure.

The invention discloses a method for calibrating triangle scanning deviations in a light beam acquiring system based on target reflection signals, and the method comprises the following steps: (1) in the process of carrying out light beam acquiring, because a target has a deviation b relative to a light beam statistics center, acquiring target reflection signals, and estimating the size of the deviation, and recording the deviation as b1; (2) driving a rapid reflector by virtue of an acquiring system, so that a light beam carries out a deviation b1 along a positive axis x; (3) acquiring signals, estimating a deviation, and recording the deviation as b2; (4) if a light beam acquiring operation is implemented, executing the step 1; if b2 is greater than 1.9 times of b1, executing a step 5; otherwise, executing a step 6; (5) controlling the light beam to carry out a negative deviation b2 along the positive axis x; (6) according to b, b1 and b2, calculating the direction of the deviation b2; (7) controlling the light beam to carry out a deviation b2 along the estimated direction; (8) acquiring signals, estimating a deviation, and recording the deviation as b3; (9) if the light beam acquiring operation is performed, executing the step 1; otherwise, executing a step 10; and (10) controlling the light beam to carry out a negative deviation b3 along an axis y, and then executing the step 1. By using the method disclosed by the invention, the automatic light beam acquiring is realized, the signal acquisition amount is reduced, and the deviation calibration time is shortened.

The present invention discloses a cooling control system of a liquid cooling server and a control method thereof. The system comprises a liquid supply pipeline, a plurality of liquid cooling servers and a liquid return pipeline that are sequentially connected. A plate-type heat exchanger, a cooling tower and a bypass valve are connected between the liquid supply pipeline and the liquid return pipeline. The liquid supply pipeline is provided with an external circulation variable frequency pump. The liquid return pipeline is provided with an internal circulation variable frequency pump. The system further comprises a liquid cooling temperature control unit controller for acquiring CPU temperature of each liquid cooling server. The liquid cooling temperature control unit controller is connected with the external circulation variable frequency pump, the cooling tower and the bypass valve. The method comprises the step that the liquid cooling temperature control unit controller controls capacity input of the external circulation variable frequency pump and the cooling tower and opening degree of the bypass valve, so that the highest CPU temperature of all liquid cooling servers is stabilized within positive and negative deviation ranges of a set temperature. Through adoption of the cooling control system and the control method, when outflow liquid temperature is used as a controlled parameter, the work of determining a temperature setting point through debugging is omitted, and the whole system has high reliability.

The invention discloses a cable-adjusting method for a cable-supported bridge on basis of a cable-length influence matrix, relating to the technical field of bridge engineering. The cable-adjusting method comprises the following steps: determining an initial state; tensioning inhaul cables according to cable lengths and calculating an output influence matrix; determining the maximum pulled-out amount and maximum releasing amount allowed by adjustments of all cable lengths; determining target values, allowed positive deviations, negative deviations and weight coefficients of control items; determining an optimized target function according to an optimization target which the method needs to meet; defining a concrete constraint condition according to the optimized objective function in the above step in order to obtain pulled-out amounts of all the inhaul cables and final values of control items to adjust cables. According to a catenary theory, the cable-adjusting method for a cable-supported bridge on basis of a cable-length influence matrix calculates the cable-length influence matrix and includes the cable-length influence matrix into geometric nonlinearity effect. Therefore, theinhaul cables can be quickly adjusted in the target state.

The invention discloses a production technology of building sheets, comprising the following steps: (1), taking the magnesium oxychloride cement board as ground mass, coarse sanding on the right side and back side of the magnesium oxychloride cement board by a sanding machine, the particle size of a coarse sanding belt of the sanding machine is 20#-60 #; (2), finishing sanding on the right side of the magnesium oxychloride cement board by the sanding machine, the particle size of a finishing sanding belt of the sanding machine is 80#-600#, the positive and negative deviation of the right side of the magnesium oxychloride cement board after the finishing sanding is 0.02mm-0.5mm; 3), coating adhesive on the right side, sticking on fabric on the right side, hot pressing by a hot press, and cold pressing by a cold press to prepare the building sheets of the invention. The invention also discloses a building sheet prepared by the production technology of building sheets. The invention also discloses five applications of the building sheets.

The invention relates to an on-line inspection method for an infrared temperature sensing device of unmanned aerial vehicle power equipment. An unmanned aerial vehicle is utilized to patrol and inspect power high-voltage equipment, when an infrared thermal imaging probe in a compound eye probe detects that the heating temperature of certain power high-pressure equipment reaches an overheating fault early warning value, the unmanned aerial vehicle gives an alarm to a remote control system and flies over a standard inspection temperature calibrator for temperature calibrating, if the calibratingerror is within an allowable negative deviation range, a control module gives an fault early warning of the overheated power high-pressure equipment, a thermal imaging image of the overheated fault equipment is displayed on a display screen, and a worker is reminded to take measures as soon as possible to eliminate faults. The on-line inspection method for the infrared temperature sensing deviceof the unmanned aerial vehicle power equipment has the advantages that temperature measurement detection can be automatically carried out on the power high-pressure equipment, and powerful guarantee is provided for the safe and economic operation of the power high-pressure equipment of transformer substations.

The invention provides a mining and stripping cooperative method of determining deep open pit expansion stable production transition depth, and belongs to the mining engineering open mining technology field. By introducing a mining and stripping positive and negative deviation variable, a mining and stripping cooperative relation in an open pit slope enlarging transition period is described by constructing a mathematical model. Compared with conventional deep open pit stage stable production transition, the mathematical model of the cooperative relation between the deep open pit bottom new level preparation and the upper part slope enlarging stripping is used to determine the reasonable depth of the deep open pit expansion stable production transition, and then references are provided for decision making of a deep open pit expansion transition production schedule and reasonable arrangement of a production scheduled plan in the transition period, reasonable configuration of production devices, and expansion financing, and in addition, the model and the solving method are suitable for being popularized and applied in mine enterprises and design organizations carrying out the stage mining of the large scale deep open pit slope enlarging transition.

The invention relates the technical field of numerical control drilling precision analysis, and discloses a hole site precision analysis method for circuit board drilling. The method comprises the following steps that first, drill-down is carried out by a drilling tool at a certain feeding speed; second, when the drilling tool is drilled into the drill entering surface of a circuit board, an error angle exists between the vertical center line of a spindle and the horizontal center line of the circuit board; third, the dynamic offset of the spindle of the drilling tool enables the drilling tool to be subjected to a component force in the horizontal direction; fourth, the action of the error angle and the dynamic offset of the spindle enables the drill point of the drilling tool to slip instantaneously; fifth, the drill-down is carried out by the drilling tool in an included angle instantaneously formed by the drill entering surface of the circuit board and the vertical direction; sixth, the negative deviation of the drill exiting surface of the circuit board is larger than the positive deviation of the drill entering surface of the circuit board, and a hole site deviation is formed. The hole site precision analysis method for the circuit board drilling uses a final accurate calculating formula of the hole site deviation value, the hole site deviation of the circuit board can be predicted at the early stage, and then the project optimization and the production operation can be guided.

The invention provides an online measurement method and system for the negative deviation of bars. The online measurement method for the negative deviation of the bars comprises the steps of A, measuring an actually-measured weight value WAct of blank materials of a rolling mill inlet, wherein the unit is Kg; B, measuring an actually-measured total length LAct of the finished bars, wherein the unit is m; C, obtaining a prediction value of the negative deviation according to a formula. The online measurement system for the negative deviation of the bars at least comprises a multi-length flyingshear programmable controller, a blank material weighing system and a finished product weighing system which are in network connection with a negative deviation calculating server. The online measurement method and system for the negative deviation of the bars can help a user to further narrow a tolerance zone of negative deviation control, the requirement of the negative deviation control for work experience of workers is reduced, the negative deviation tolerance zone can be reduced by about 0.2% and can be expected to reach 0.5% or below, and considerable economic benefits can be brought tosteel companies.

A ball milling process for preparing hard alloy mixture, characterized by utilizing a process of stirring ball milling, in which balls of hard alloy with diameters of 4 to 6 mm are used, the positive and negative deviation of the diameters of the alloy balls is less than or equal to 0.1 mm; tungsten carbide powders with particle sizes of 0.3 to 0.8 μm and cobalt powders are used; ethyl alcohol is used as a grinding medium, while paraffin wax is used as a forming agent. This process of ball milling has advantages of high efficiency, low energy consumption, ease of mass production, etc. and can be widely used in the preparation of hard alloy mixture.

The invention discloses a tool center point calibration circuit of a welding robot. The tool center point calibration circuit includes a signal receiving circuit, a comparison switch circuit and a stable driving circuit. The signal receiving circuit transforms real-timely received 4-20 mA displacement signals into 0-10 V voltage signals, then the 0-10 V voltage signals enter a subtracter in the comparison switch circuit for subtracting, positive deviation signals or negative deviation signals are output, then the positive deviation signals or the negative deviation signals are compared and analyzed through a window comparison circuit composed of an operational amplifier AR3 and an operational amplifierAR4. When an allowable deviation range is exceeded by + / -3%, a high level is output, a relay K1 coil is energized, and the stable driving circuit receives the positive deviation signals or the negative deviation signals through a closed relay K1 normally open contact K1-1, and an operational amplifier AR5 is used for reversely amplifying the signals, the signals are subjected to feedback calibration through an audion Q2 and an audion Q3, and then the direction and magnitude of the current flowing through an electromagnet are controlled through a series resistor R16, so that the horizontal or vertical positive deviation signals or the horizontal or vertical negative deviation signals are adjusted; and the problems that due to small deviation, the welding robot moves frequently to find the center and the work is difficult are effectively solved.