776 results about "Variation value" patented technology

A small-sized pen-shaped input apparatus precisely detects handwriting input. The apparatus compensates for the effects of the inclination of the pen-shaped input apparatus. An initial inclination angle calculating section calculates the initial value of the inclination angle of a pen shaft in a gravity coordinate system. The inclination angle variation calculating section calculates a variation value of the inclination angle of the pen shaft. A handwriting inclination angle calculating section calculates the inclination angle of the pen shaft when writing. A coordinates conversion calculating section converts the coordinate system of the acceleration from the pen shaft coordinate system to the gravity coordinate system. A movement amount calculating section calculates the movement direction and the movement distance of the pen's tip end. Finally, a handwriting detecting section detects a state of handwriting or non-handwriting.

A technique is disclosed for detecting contraband by obtaining image data from a computed tomography machine and generating variance data and a variance map from the image data acquired. The method includes obtaining a mean density value and a variation value for each voxel of the image data, segmenting the voxels into discrete objects, and determining whether any of the discrete objects is contraband.

The invention is a determining method for a touch control induction device comprising a touch control pad at least connected to m X n equivalent capacitors, where m is number of equivalent capacitors in the X-axis direction and n is that in the Y-axis direction, and the determining method comprises the steps of: charging m equivalent capacitors of a column to obtain m digital signals; comparing them with one another and using the smallest as a potential reference value; repeating the above two steps to obtain n potential reference values; touching the touch control pad; scanning the touch control pad to obtain at least a potential variation value relative to m equivalent capacitors of at least a column; and comparing the potential reference value with the potential variation value to determine which point in this column on the touch control pad is touched.

Servo control methods and apparatus for a tape drive. A read/write head reads and writes data on magnetic tape with at least one servo track providing transverse position information. At least two servo readers arranged for reading a servo track associated with the read/write head operate concurrently to generate servo read signals. A position estimator processes each servo read signal to generate a series of position values corresponding to respective time instants indicative of their transverse positions. A servo controller calculates a skew value indicative of tape skew relative to the read/write head and a tension variation value indicative of variation of tape tension. The servo controller is adapted to account for cross-coupling between tape skew and tension variation.

The invention discloses a control method and a device of air-conditioning equipment and an air conditioning system. The control method comprises the following steps of: step S101, carrying out comparison on the water-outlet temperature of an evaporator and set object temperature, and determining the object load value of the compressor of the air-conditioning equipment; step S103, determining the variation of the load value of the air-conditioning equipment according to the object load value and the current load value of the compressor of the air-conditioning equipment; and step S105, adjusting the current load value of the compressor of the air-conditioning equipment according to the determined variation value. According to the invention, an object load is obtained through collecting the backwater temperature of an evaporator, the load of the compressor is adjusted according to the object load, and more accurate reference can be used for rationally adjusting a working mode of an air conditioner compressor; and the frequent adjustment of the compressor is avoided, the display of the system performance is more stable, and the service life of the compressor is guaranteed.

The invention relates to a soft tissue deformation simulation method based on smooth particle hydrodynamics, belonging to the technical field of graphic processing. In the method, a smooth particle hydrodynamics method is selected, and a viscoelastic mechanics model is used for reflecting the biomechanical characteristics of soft tissue. The method comprises the following steps of: constructing a series of equations related to soft tissue deformation simulation according to the viscoelastic model; selecting a proper support domain search strategy and a smooth kernel function, approximately calculating each related item of the equation by adopting the particle approximation method, and calculating the variation values of the density, the position, the velocity and the like of each particle along with time through the display integration method; and dynamically outputting the status of each time step size of the particle model to a screen, rendering texture irradiation, and displaying the real-time deformation process of soft tissues and organs under stressing conditions. The method does not need troublesome grid computing, thereby increasing the accuracy and the real-time performance of soft tissue deformation simulation.

A fully-charged battery capacity detection method includes a capacity variation detection step, an open-circuit voltage detection step, a remaining capacity determination step, a remaining capacity variation rate calculation step, and a fully-charged capacity calculation step. The capacity variation detection step calculates a capacity variation value (δAh) of a battery between first detection timing and second detection timing. The open-circuit voltage detection step detects first and second open-circuit voltages (VOCV1, VOCV2) of the battery at the first and second detection timing, respectively. The remaining capacity determination step determines first and second remaining capacities (SOC1 [%], SOC2 [%]) of the battery based on the first and second open voltages (VOCV1, VOCV2), respectively. The remaining capacity variation rate calculation step calculates a remaining capacity variation rate (δS [%]) based on the difference between the first and second remaining capacities (SOC1 [%], SOC2 [%]). The fully-charged capacity calculation step calculates a fully-charged capacity (Ahf) of the battery based on the remaining capacity variation rate (δS [%]) and the capacity change value (δAh).

The invention relates a method for controlling a radio frequency communication distance. The method comprises the following steps of: storing correspondence between a communication distance and radio frequency characteristic parameters in radio frequency communication equipment in advance, and setting a trigger threshold value of echo field intensity variation, wherein the radio frequency characteristic parameters comprise an echo field intensity variation value and a radio frequency signal field intensity value; in the process of communication between the radio frequency communication equipment and a radio frequency communication terminal, detecting the current echo field intensity variation value continuously by the radio frequency communication equipment and judging that the absolute value of the current echo field intensity variation value reaches the trigger threshold value of echo field intensity variation; if so, performing the next step; otherwise, repeating the step; acquiring the current radio frequency characteristic parameters by the radio frequency communication equipment, determining the current communication distance according to the correspondence, and then judging whether the current communication distance is in a preset card swiping range; and if so, allowing the card swiping transaction and otherwise, not allowing the card swiping transaction. The method can effectively reduce the factor influence of the radio frequency communication terminal on the distance control and has high stability; and the distance can be accurately controlled.

The invention provides a mobile terminal display screen control method, comprising the following steps: sensing the extraneous light intensity variance and generating the corresponding light intensity variance parameter; judging whether the light intensity variance parameter reaches the set value: if the light intensity becomes stronger and the variation value exceeds the threshold value, the display screen is opened; if the light intensity becomes weaker or the light intensity becomes stronger and the variation value does not exceeds the threshold value, the display screen is not opened. The user uses the mobile terminal without fussy operation. The invention also provides a corresponding mobile terminal.

The invention discloses an insulation monitoring device and method of a power cell of an electric vehicle. The insulation monitoring device comprises an electricity leakage detection circuit, a microprocessor, a signal generator and a signal collector, wherein the signal generator is connected with the chassis of the electric vehicle and the signal collector is connected with a sampling resistor. The signal generator is used for generating low-frequency voltage signals, and the signal collector is used for collecting voltage signals on the sampling resistor and transmitting the voltage signals to the microprocessor through a signal conditioning circuit; because the current flowing through the sampling resistor is the sum of the leakage current of the high-voltage system of the power cell and current generated by a low-frequency voltage signal transmitted by the signal generator, the microprocessor calculates an insulation resistance of a high-voltage system of a power cell on the chassis of the electric vehicle according to a current variation value; and when the insulation resistance of the high-voltage system of the power cell on the chassis of the electric vehicle is reduced to a preset response value, the microprocessor drives an alarming device to open and reminds a user to quickly carry out fault diagnosis, therefore ensuring the regular operation of the power cell and avoiding the potential safety hazard due to drop of insulation.

In a fully-charged battery capacity detection method, first and second no-load voltages (VOCV1, VOCV2) of a battery are detected at first no-load timing and second no-load timing, respectively. First and second remaining capacities (SOC1 [%], SOC2 [%]) of the battery are determined based on the first and second no-load voltages, respectively, if the first no-load voltage (VOCV1) falls within a predetermined voltage range. A fully-charged capacity (Ahf) of the battery is calculated based on a remaining capacity variation rate (δS [%]) and a capacity variation value (δAh) of the battery. The variation rate of the remaining capacity is calculated based on the difference between the first and second remaining capacities. The capacity variation value of the battery is calculated based the integrated value of the charging current and discharge currents of the battery to be charged/discharged from the first no-load timing to the second no-load timing.

The invention discloses a phase-changing failure suppression method based on direct current prediction control, and the method comprises the following steps of inputting direct current Id_inv at an inversion side and alternative-current bus three-phase instantaneous voltage ua, ub and uc; adopting a phase-changing failure prediction control module to detect the operation state of a current alternative-direct-current system so as to judge whether the phase-changing failure of an inverter happens or not; adopting a phase-changing failure prediction control module to predict and output an inverter trigger retardation angle variation value delta ainv_PREV; detecting a judgment signal of the phase-changing failure prediction control module, predicting a direct current setting value if the phase-changing failure possibly occurs to obtain a prediction value Id_PREV, and otherwise enabling the direct current to be a normal setting value Id_NOR; and outputting the Id_PREV and the delta ainv_PREV to a rectifier and inverter control system to be used for suppressing the phase-changing failure. Due to the adoption of the phase-changing failure suppression method, the phase-changing failure probability of a direct-current power transmission system can be reduced.

The invention discloses a method and a system for automatically lightening a screen of a mobile phone. The method comprises the following steps of acquiring an approach state of the mobile phone and a screen state and detecting variation of acceleration of the mobile phone in the vertical direction; and when the approach state of the mobile phone is in a close state, the screen state is in a vertical state and variation of the acceleration in the vertical direction exceeds a first acceleration variation value, automatically lightening the screen of the mobile phone. The method also comprises the step of automatically turning out the screen of the mobile phone if detecting that variation of the acceleration of the mobile phone in the vertical direction exceeds a second acceleration variation value after the screen of the mobile phone is automatically lightened. By the method and the system for automatically lightening the screen of the mobile phone, a user can conveniently view time, date, short messages, incoming call information and the like from the mobile phone, the service life of a power button is prolonged, the energy consumption is reduced and the user experience is promoted.

The invention discloses a touch panel and an applied touch display device. The touch panel comprises a first substrate, a sensing electrode structure, a second substrate and a shielding layer, wherein the first substrate and the second substrate are arranged in parallel; the sensing electrode structure is arranged on the first substrate; the sensing electrode structure and an external component form a first capacitor; the shielding layer is formed on the second substrate and is connected to a grounding end; the shielding layer and the sensing electrode structure form a second capacitor; and the variation values of the second capacitor and the first capacitor are used for detecting the touch action of the external component.

The purpose is to solve target problems in short calculation time certainly without describing algorithms that are data procedures on computers. As the solution method, because it is configured so that, when the initial values or variation values, which are used for constraint conditions with regard to target problems and the relevant constraint conditions, are set through Variable Value Setting 2, then Constraint Condition Extraction 3 extracts constraint conditions that are related to those variables, then Constraint Condition Calculation 4 searches for the solutions for each constraint condition one by one, and Variable Value Resetting repeats searching for the solutions for each constraint condition setting these searched solutions as new variables, so the course of solution searching becomes clear, and it becomes possible to surely reach the final solution and dramatically speed up computing, because each markedly simplified constraint condition has only to be solved.

A vehicle generator motor has a generator motor that is connected to an internal combustion engine and plural sets of three-phase windings, plural sets of inverter portions connected to the respective sets of the three-phase windings, and a control circuit portion for controlling the inverter portions in accordance with the operation state of the generator motor. When the generator motor operates as a motor and a variation value of an output torque or power generation amount thereof exceeds a predetermined value, the control circuit portion controls the inverter portions so as to stop armature current flowing in at least one set in plural sets of three-phase windings.

In an embodiment, a data processing method comprises receiving permanent properties data for a plurality of agricultural sub-fields of an agricultural field; determining whether at least one data item is missing for any sub-field of the plurality of agricultural sub-fields in the permanent properties data, and if so, generating additional properties data for the plurality of agricultural sub-fields; generating preprocessed permanent properties data by merging the permanent properties data with the additional properties data; generating filtered permanent properties data by removing, from the preprocessed permanent properties data, a set of preprocessed permanent properties records corresponding to a subset of the plurality of agricultural sub-fields in which two or more crops were grown in the same year; applying a regression operator to the filtered permanent properties data to determine a plurality of intra-field variations values that represent intra-field variations in predicted yield of crop harvested from the plurality of agricultural sub-fields.

The invention relates to a device and method for measuring resistance and postures of a ship module. The device consists of an S-shaped resistance dynamometer, a trolling supporting rod, a guyed displacement measuring mechanism, a guide frame assembly and a band brake mechanism. When the device trolls a pool for measuring the resistance of the ship module, the device can also obtain a trim angle and the heaving postures of the head and the tail of the ship module, and resistance measuring under a stable speed condition of the ship module is realized by the interworking of the resistance dynamometer and the band brake mechanism; a wire is driven by the head and the tail of the ship module through utilizing the guyed displacement measuring mechanism, so that a corresponding voltage is outputted by a potentiometer, and a vertical displacement variation value of a bow and a vertical displacement variation value of a stern of the ship module are obtained through a straight-line relation; and a trim angle of the ship module, a heaving value of the ship module, the vertical displacement variation value of the bow and the vertical displacement variation value of the stern of the ship module are calculated; during trolling, the situation that the ship module moves freely in a vertical direction can be guaranteed by the guide frame mechanism, and the situations that a rolling cylinder is low in vertical sliding friction and free in vertical movement are guaranteed by utilizing a rolling shaft.

The invention provides a cable force monitoring device for an attached-type stay cable. In the technical scheme of the invention, a reliable composite semi-rigid contact cohesion-type mechanical deformation transmitter is installed at the position of a fixed scale distance on a stay cable with a traditional structure; a temperature self-compensating fiber grating precision strain transducer is adhered to the surface of the stay cable through the composite semi-rigid contact cohesion-type mechanical deformation transmitter; and the axial strain caused by the change of the pulling force applied to the stay cable in a scale distance is measured; the axial strain of the stay cable is converted into optical signals through the fiber grating precision strain transducer, and the optical signals are transmitted to a collecting demodulation terminal through an optical cable for demodulation; and testing software automatically calculates the corresponding cable force variation value according to strain measurement data, stay cable cross section geometric parameters and mechanical property parameters of stay cable materials, and further the automatic real-time dynamic monitoring of the stay cable is realized.

The invention discloses a method of establishing an elastic-plastic mechanical constitutive model made of a rock material. The method comprises the following steps: measuring and recording variation values of axial and lateral strains of a rock specimen along with the stress, and calculating a volumetric strain of the rock specimen; drawing a stress-axial/lateral strain relation curve according to recorded full-course axial and lateral strain changes of the rock specimen, and respectively determining a yield failure rule and a hardening rule of the rock material of the specimen; drawing a stress-volumetric strain relation curve according to the calculated volumetric strain of the rock specimen to determine a non-relevant flow rule of the rock material of the specimen; determining the constitutive model by using a thermodynamic elastic-plastic theory in combination with the stress-strain curve, peak stress, yield initial stress and boundary strength of rock. The method disclosed by the invention comprehensively considers the yield rule, the non-relevant flow rule and the hardening rule of the rock material, favorably reflects the elastic-plastic mechanical behavior of the rock material and ensures the uniqueness and the accuracy of the constitutive model.

The invention relates to a method, an apparatus and a system for detecting the abnormality of DNS query flow, which belong to the technical field of Internet. The detection method comprises the following steps of: respectively counting DNS query flows of regions according to the pre-divided region units; respectively determining the covariance matrixes corresponding to a plurality of time slices according to DNS query flows of regions; respectively calculating the matrix relevance variation value between the covariance matrixes corresponding to the plurality of time slices and the average covariance matrix; and outputting the instantaneous alarm information when the matrix relevance variation value between the covariance matrixes corresponding to any time slices and the average covariance matrix is greater than the first predetermined value for indicating that the DNS query flow of any time slices is abnormal. The invention is beneficial to reducing the loss of abnormality of DNS query flow.

The invention discloses a method for identifying damages of a frame structure. The method comprises the following steps: firstly, testing an undamaged frame structure, and carrying out model modification on an initial discretization model of the frame structure so as to obtain an accurate finite element theoretical model, and calculating a structural modal parameter (omega A0, phi A0); then, testing the damaged frame structure, and carrying out model analysis on the damaged frame structure so as to obtain a modal parameter (omega t2, phi t2); and finally, establishing a direct analysis method damage identification equation, and solving an unit damage coefficient Di (i=1, 2,..., n) by using front n (n is less than or equal to N) order frequencies and vibration mode variation value delta omega r (r=1, 2,..., n) of the frame structure before and after damage so as to achieve the purpose of simultaneously identifying the number, position and size of the damages existing in the whole structure. The method is suitable for the damage identification of a construction frame structure, and has the advantages of less required detection data amount, high efficiency and higher precision.

The invention discloses a DDoS attack detecting method and a DDoS attack detecting system of a multi-tenant cloud computing system. The method comprises the following steps: arranging a detecting server at a control node of a multi-tenant cloud computing system, and establishing a detecting proxy for each computing node; counting, by the detecting proxy, a number of data packets transmitted by each virtual machine to different destination IP addresses at an i period of time according to flow data collected at the i period of time; calculating, by the detecting proxy, a flow entropy variation value of each virtual machine according to the statistics data, if the flow entropy variation value transmitted by the virtual machine I to the destination IP is greater than the set flow entropy variation threshold value, judging the data flow as a suspicious DDoS attack flow, and transmitting the data flow to the detecting server; identifying, by the detecting server, a potential attack flow according to a data destination IP address, a tenant identifier aggregation destination address and a ratio of an aggregation result in total flow; and if a relative entropy of two potential attack flows is less than a set threshold value, judging as the DDoS attack flow.