82 results about "Speed factor" patented technology

The invention discloses a novel cluster head election method for wireless sensor networks. The method is characterized in that during cluster head election, a probability iteration method is used; in a probability iteration formula, node residual energy is considered, and a node energy consumption speed factor Eavecons/Econsume, a node degree factor Dnbr/Nalive, a node-to-aggregation-node distance factor dtoSINK_MAX-dtoSINK/dtoSINK_MAX-dtoSINK_MIN and the like are introduced. A mechanism of optical cluster head election can be improved to a certain degree, considered factors of cluster head election are more scientific, more reasonable and more comprehensive, uniform distribution of cluster head nodes is achieved, energy consumption of the nodes can be reduced, the life cycle of the networks is prolonged, and the novel cluster head election method can be widely applied to the wireless sensor networks.

The invention relates to the technical field of traffic safety facilities, and discloses a safety prompt device and prompt method for an on-ramp vehicle to merge into a main road. The device comprises a microprocessor, a millimeter wave radar and a display screen, wherein the millimeter wave radar is used for detecting the speed of the on-ramp vehicle and the distance between the on-ramp vehicle and the radar; the display screen is used for displaying the safety for the on-ramp vehicle to merge into the main road in real time; an output end of the millimeter radar is electrically connected with an I/O (Input/Output) input end of the microprocessor; an input end of the display screen is electrically connected with an I/O output end of the microprocessor; the millimeter radar is arranged on a bracket which is arranged at a tail end of a speed-up road section of a ramp to enter the main road; a detection surface of the millimeter radar faces the speed-up road section; the display screen is arranged below the millimeter radar. The selected safety evaluation index is a TTC (Time to Collision) value after a speed factor is added.

This invention involves time domain interpolation of video signals. In order to adjust the presentation speed of a video data stream, a plurality of video frames is temporarily stored in a frame buffer, and the video frame to be displayed is generated by time domain interpolation between a plurality of the stored frames.

A method for calibrating vehicle speed measurer includes receiving GPS positioning data by GPS receiver and obtaining instrument data by said speed measurer, judging whether GPS positioning data and instrument data are in accordance to speed calibration model or not, revising speed factor originally set in said speed measurer to obtain new speed factor and storing it then using product of this new speed factor and instrument data as true speed of vehicle if it is or otherwise re-receiving GPS positioning data and instrument data.

The invention belongs to the field of video technology processing. A method and apparatus for secure high-definition video rewind are particularly disclosed. The apparatus comprises: analysis module,a decoding module and a playback display module, wherein, the target code stream is analyzed by the analysis module to obtain a frame type of each frame and a frame unique identifier, GOP method is used for structured storage, at that same time, the information of each frame after decoding is selectively stored in the first level cache according to the speed factor segmentation multi-level cache strategy, the contents of the first level cache are exchanged into the second level cache according to the multi-level cache strategy, and the images in the second level cache are directly and sequentially pushed into the playing display module for reverse order display. This scheme tries to find a balance between cpu and memory consumption by multiplier and multilevel buffering, avoiding excessiveconsumption of cpu and memory, and satisfying the requirements of multipath and multiplier fluent reversal.

Systems, apparatuses, and methods are illustrated for enhancing the transfer of funds. Aspects of the disclosure relate to enhancing the transfer of funds using a plurality of factors, such as speed factors, quality factors, cost factors, and/or priority factors. Users sometimes desire to remotely transfer funds from their account (i.e., payor account) to a payee, but are ambivalent as to the delivery mechanism their financial institution uses to perform the transfer. Systems and methods are disclosed to assist in selecting delivery mechanism to transfer funds in an enhanced manner.

The reason why a time delay system is difficult to control is that information feedback is not timely, thus a controller based on feedback information seems to be powerless to the kind of systems. Aiming at the control problem of the time delay systems, a predictive wisdom proportional-integral (PWPI) control method that does not depend on a controlled object model is invented. The PI control method regards nominal model parameters of a time delay object as model parameters of a Smith predictor, combines output of the Smith predictor with actual output of the object to form compensation outputof the system, designs a predictive wisdom PI controller, determines speed factors of the PWPI controller according to a time delay estimated value and a time constant nominal value, theoretically analyzes the stability of a closed-loop control system and the robustness of the controller, is an effective control method, and has a wide application value in the field of time delay system control.

The invention discloses preparation of high-speed bearing grease, and the grease is particularly applied for lubricating high-speed bearings in the industries of electronics, machine tool manufacturing, textile chemical fiber and the like. The grease consists of base oil and thickening agent, the penetration of the prepared grease is between 200 and 340 at the temperature of 25 DEG C, and the similar viscosity is smaller than 1400 at the temperature of minus 50 DEG C. The grease can meet the lubrication of the bearing the speed factor (DN value) of which is more than 2 million, can lubricate completely in a cold environment, and produces very small noise.

The invention discloses a cell switching method and device. The cell switching method comprises the following steps: acquiring a movement speed of a terminal; and selecting a switching target cell from candidate switching cells according to the movement speed of the terminal, and switching the terminal to the switching target cell. According to the cell switching method provided by the invention, a movement speed factor of the terminal is considered, and a proper switching target cell is determined according to the movement speed, so that the problem of frequent switching of the terminal due to miss of consideration of the movement speed of the terminal in existing cell switching is solved; the switching effect is optimized; and the user experience is improved.

The invention discloses a method and a device for determining a downlink beam forming weight vector. The method comprises the following steps: receiving a pilot signal sent by a terminal so as to estimate the frequency offset of the terminal; judging whether the frequency offset is smaller than preset frequency offset; if the frequency offset is smaller than the preset frequency offset, determining a weight vector according to a first mode, namely acquiring a first time interval, judging whether the first time interval is smaller than a first threshold value, if so, directly determining the downlink beam forming weight vector by using an SRS (sounding reference symbol), and otherwise, determining the downlink beam forming weight vector by using a PMI (pre-coding matrix indicator); if the frequency offset is not smaller than the preset frequency offset, determining the weight vector according to a second mode, namely acquiring a second time interval, judging whether the second time interval is smaller than a second threshold value, if so, directly determining the downlink beam forming weight vector by using the PMI, and otherwise, determining the downlink beam forming weight vector by using the SRS. A speed factor and a time factor are taken into overall consideration, and a weight vector calculation mode suitable for a current scene is selected in real time, so that the calculation accuracy of the weight vector and the beam forming effect can be improved, and the downlink performance and cell capacity of a user are improved.

The invention discloses a design method of a multi-functional variable-parameter viscous damper and the damper, and relates to the technical field of shock absorbing. The design method of the multi-functional variable-parameter viscous damper includes the steps that according to the damping factor C I and the speed factor alpha I, varying with the change of the speed V of a damper valve, of the viscous damper, a constitutive relation curve of the viscous damper is divided into a plurality of phases; according to the constitutive relation curve, three curved surfaces of the damper valve in the viscous damper are designed; and the first curved surface, the second curved surface and the third curved surface correspond to the phase I, the phase II, and the phase III. According to the design method, the viscous damper can automatically adjust damping force based on the movement speed of a damper piston, and meet requirements for a plurality of application scenarios in the same bridge. The viscous damper can effectively protect the bridge against damage caused by temperature-resulted deformation, is beneficial for reducing displacements caused by wind vibration and external loads of brakes so that devices, such as the viscous damper and expansion joints, can be prevented from premature fatigue and damage, and is beneficial for improving the seismic resistance of the bridge structure.

The embodiment of the invention discloses a bus route priority determination method and device, and a bus transfer route ranking method and device. The objective of the invention is to solve a problemthat a current bus route priority determination method is bad in accuracy. The bus route priority determination method comprises: receiving location data sent by a user terminal; generating bus running track data corresponding to bus routes according to the location data; for each bus route, employing time information and position information of the location data in the bus running track data corresponding to each bus route, and determining a running speed and a departure frequency of buses on each bus route in a set time section; and employing the determined running speed and departure frequency to determine time priority of each bus route in the set time section. a running speed factor which influence a riding running time is considered, a departure frequency factor which influence a waiting time is also considered, and therefore the accuracy of the determined priority of each bus route in the set time section is very high.

The invention discloses a double-disturbance MPPT control method of a photovoltaic power generation system. A switch capacitor converter is employed as a control circuit of MPPT, and is composed of two switch capacitor units SC1 and SC2 and a direct current filter. A double-disturbance P&O algorithm is provided on this basis, the SC1 and the SC2 employ a variable step size algorithm, different speed factors are selected, a bidirectional complementation control mode is formed, namely, only reverse disturbance can be carried out after one enters a dead zone, forward disturbance is completed by the other one. Through the control mode, the disturbance convergence speed is raised, the dead zone problem is solved, starting can be carried out rapidly and stably, misjudgement is reduced, the oscillation phenomenon of a system output power in the maximum power point can be reduced effectively, and energy loss of a photovoltaic module is reduced.

A method for estimating the relative speed factor parameter for a variable speed pump in a hydraulic network sufficient to maintain a fixed pressure at a control node is provided. A desired operating characteristic is determined and this is inserted into a matrix of equations describing the hydraulic system. The largely symmetrical matrix includes certain aspects of the system representing the variable speed pumps which are non-symmetrical. Non-symmetrical portions of the matrix are separated out and solved using an LU factorization technique. Non-sparse, non symmetric matrices are generated and the difference in head correction is solved for to compute the updated nodal head vector and ultimately determine the variable pump speed parameter. The invention allows estimation of the variable speed factor for a variable speed pump drive sufficient to maintain a fixed pressure at a control node. The system fully integrates variable pump speed operation with the status and control capabilities of known hydraulic network solvers.

A write pulse generating apparatus includes a control unit which provides information on an optical recording medium type and information on a recording speed factor, and a control signal generating unit which determines a multi-pulse type which is to be generated in a multi-pulse interval based on the information recording medium type and recording speed factor. The generating unit generates a signal for controlling the light emitting device driving unit to generate a write pulse having the determined multi-pulse type. A control unit sets the level of the write pulse for up to an entire interval of a write mark and/or a write space according to the optical recording medium type and the recording speed factor.

The invention discloses an intelligent uploading method of a vehicle GPS device. An intelligent uploading system includes an on-vehicle GPS intelligent positioning device, a cloud management platform, a mobile phone client and a vehicle. The on-vehicle GPS intelligent positioning device is electrically connected with an internal circuit of the vehicle, and comprises a GPS positioning module, a data processing module and a network communication module. The network communication module integrates a SIM card. The network communication module is in communication connection with the cloud management platform. The cloud management platform is in communication connection with mobile phone client and is used to query vehicle positioning data and display the vehicle positioning data on a map in real time. The method combines a speed factor, uploads a position with different upload frequencies according to the different running speed, guarantees that the distance between the positions uploaded at two adjacent time points so as to guarantee a smooth track route.

A method and apparatus for reproducing data from an optical disc in which a disc inducing vibration is detected and the speed of the disc is adjusted to an appropriate speed which does not cause vibration. The method includes obtaining the frequency of vibration by subtracting the count value of track traverse pulses at the lowest speed factor from the count value of track traverse pulses at the highest speed factor; and varying the speed factor of reproducing data from the disc based upon a comparison of the obtained frequency of vibration with a predetermined base value.

For the control problem of a non-affine nonlinear uncertain system, the invention relates to a two-speed adaptive proportional-derivative (2SAPD) control method independent of a controlled object model. According to the control method in the invention, system dynamics and internal and external uncertainty are defined as total disturbance; therefore, the non-affine nonlinear uncertain system is converted into a linear uncertain system, so that an error dynamics system under total disturbance excitation is constructed; thereby, a two-speed adaptive proportional-derivative control model by takingthe central speed factor as the core is designed; the facts that a closed-loop control system composed of a 2SAPD controller has the global asymptotic stability robustness and the 2SAPD controller also has good anti-disturbance robustness are theoretically analyzed; and the two-speed adaptive proportional-derivative control method in the invention has wide application value in the fields of power, mechanisms, chemical engineering, traffic, aviation, spaceflight and the like.

The invention discloses a method for inhibiting tail-end residual oscillation of a four-degree-of-freedom cylindrical coordinate type palletizing robot. The method comprises the following steps of: acquiring signals aB(t) and aT(t) of two acceleration sensor at a large arm and a tail end of the four-degree-of-freedom cylindrical coordinate type palletizing robot; performing discrete Fourier transform on aB(t) and aT(t) to obtain aB(j omega) and aT(j omega); performing cut-off frequency calculation on aT(j omega) to obtain cut-off frequency omega c; calculating through aB(j omega), aT(j omega) and omega c to obtain a speed factor s and a position factor p; calculating through s, p and omega c to obtain a parameter for compensating moment of force, thereby obtaining compensated moment of force F; and taking F as a feedforward compensated moment of force of a joint servo motor on the waist of the palletizing robot to inhibit tail-end residual oscillation. The method has the beneficial effects that: compensated moment of force of the servo motor on the waist of the robot is established based on the signals of the acceleration sensors for solving the problem that residual oscillation is easily generated at the tail end during high-speed positioning of the four-degree-of-freedom cylindrical coordinate type palletizing robot, and the parameter for compensating moment of force is quickly optimized through an online setting mode.

The invention discloses a single-speed adaptive proportional-derivative control method which does not rely on a controlled object model for the control difficulty of the non-affine nonlinear uncertainsystem. According to the control method, the system dynamic and internal and external uncertainty are defined as sum disturbance, so that the non-affine nonlinear uncertainty system is transformed into a linear uncertainty system, and then an error dynamic system under the sum disturbance excitation is constructed, and the single-speed adaptive proportional-derivative controller model with the speed factor as the kernel is designed accordingly. Theoretical analysis shows that the closed-loop control system composed of SAPD controller not only has global asymptotic stability and robustness, but also has good anti-disturbance robustness. The invention has wide application value in the fields of electric power, machinery, chemical industry, transportation, aviation and aerospace.