64 results about "Instantaneous rate" patented technology

A communication network having a plurality of subscriber units receive a finite resource from a common node is disclosed. Individual subscriber units may seize the finite resource of the common node to the exclusion of all other subscriber units in the network. A scheduler allocates the finite resource to the individual subscriber units based upon a weight associated with the individual subscriber units. The scheduler determines the weight for each of the subscriber units based upon an instantaneous rate of consuming the finite resource.

Systems and methods are provided for allocating bits to pictures in accordance with the bit allocation constraints for operation at both constant and variable bit rates. A statistical complexity measure which is an estimate of the average encoding complexity of the entire data is updated after encoding each picture. This set of parameters, along with an estimate of the encoding complexity of the current picture and the desired average coding rate is used to allocate target bits for encoding the current picture. One method of allocating bits to a picture is to used the statistical complexity measure to vary the instantaneous rate of encoding and allocate bits for this picture so as to generate encoded data at this rate. Another method is to modulate the target generated by a conventional encoder using the current level of the Virtual Buffer Verifier and the deviation of the estimated encoding complexity of the current picture from the statistical complexity measures.

Nonlinear adaptive resource management systems and methods are provided. According to one embodiment, a controller identifies and prevents resource starvation in resource-limited systems. To function correctly, system processes require resources that can be exhausted when under high load conditions. If the load conditions continue a complete system failure may occur. Controllers functioning in accordance with embodiments of the present invention avoid these failures by distribution shaping that completely avoids undesirable states. According to one embodiment, a Markov Birth/Death Chain model of the resource usage is built based on the structure of the system, with the number of states determined by the amount of resources, and the transition probabilities by the instantaneous rates of observed consumption and release. A control stage is used to guide a controller that denies some resource requests in real systems in a principled manner, thereby reducing the demand rate and the resulting distribution of resource states.

A method and system for fairly distributing servicing of I/O requests by a storage device among remote computers that contract for a specified maximum rate of I/O request servicing by the storage device. The remote computers also specify whether the storage device should employ a simple throttling technique or a sliding window throttling technique to limit the rate of I/O request servicing to the contracted-for rate of I/O request servicing. In the simple throttling technique, the storage device services up to some maximum number of I/O requests per unit time for the remote computer, regardless of the overall time-averaged rate of I/O request servicing provided to the remote computer. In the sliding window throttling technique, the storage device maintains an approximate, periodically re-calculated instantaneous rate of I/O request servicing calculated based on recent I/O request servicing by the storage device on behalf of the remote computer. Intervals between servicing of I/O requests are lengthened or shortened in order to continuously adjust the instantaneous rate of I/O request servicing towards the contracted-for rate of I/O request servicing.

The invention provides an unmanned aerial vehicle base station group deployment method based on time correlation. According to the method, a coverage blind area of a ground base station serves as a target area covered by an unmanned aerial vehicle base station group, and the deployment position and the deployment range of the unmanned aerial vehicle base station group are determined according to environmental parameters (position, size and building average height) of the target area. Because link condition fluctuation is caused by conversion between a sight distance link and a non-sight distance link in a three-dimensional space channel and change of shielding conditions of obstacles during transmission of an unmanned aerial vehicle base station, the instantaneous rate does not accuratelyrepresent the average rate of a network any more, time correlation is introduced, and network performance of large-scale time is obtained. Specifically, the interference correlation coefficient is used for measuring the time correlation, the joint coverage rate is used for representing the network performance of large-scale time, and the optimal deployment height and the number of unmanned aerialvehicle base stations are determined according to the change relation of the joint coverage rate along with the deployment height of the unmanned aerial vehicle base station group and the number of the unmanned aerial vehicle base stations in the group.

A method for detection of rotor bar faults in an electric machine is provided. The method includes acquiring electrical signals from the electric machine that are representative of the operative condition of the machine. The symmetrical components from the electrical signals are eliminated by squaring an instantaneous value of each data point from the electrical signals and summing the squared values. The method further includes the step of eliminating discontinuities in the electrical signals by applying a window function to compute weighted representation of the squared values. Furthermore, the method includes the step of normalizing the weighted representation to obtain spectral information. The faults in the rotor bar are detected by analyzing the spectral information obtained after normalization.

This invention relates to an apparatus and method for deriving speed and position information for an electric motor. Apparatus for and a method of controlling a motor 100 are also disclosed. The apparatus for providing information relating to the operation of an electrical motor 100 comprises a sampler 50, 51 for sampling the instantaneous motor current i_s and a processor 160 for determining the instantaneous rate of change of the motor current and providing information about the motion or position of said motor based on said instantaneous rate of change of the motor current. In this way speed and position information can be provided, at low speeds, and without using a speed sensor.

The invention discloses a relay system energy efficiency optimization method based on the OFDM, and belongs to the technical field of mobile communication. The method comprises the steps: building a system model; carrying out the analysis of a system scene; summing up problems; and solving an optimization problem through employing a convex optimization method. The method combines the integrated channel state information under the constraints of the maximum total power and minimum user instant speed, gives consideration to the joint optimization problem of enabling the energy efficiency to be maximized while considering to the equity, and gives a mathematical expression of user equity. Aiming at the solving of the optimization problem, the method employs the convex optimization processing, converts a target function of an optimization problem, does not need to carry out approximate calculation, does not affect the precision of the problem, greatly reduces the calculating complexity, and reduces the time delay caused by the system expenditure. The method is reasonable in algorithm design, and is easy to implement.

In an outbound call management system, calls to dial are placed in a buffer queue before transfer to the outbound switch. The rated switch capacity (i.e., X calls per minute) is divided into small submultiples (i.e., Y calls per second) such that short term switch capacity will not be exceeded. Calls are transferred from the queue at the submultiple rate or less depending upon the number of calls in the queue. The time scale is small enough that this instantaneous rate at which calls can be transferred from the queue to the switch does not exceed the instantaneous capacity of the switch. If calls are being placed into the queue at a faster rate than they are sent to the switch, the number of calls in the queue will increase. The call management system will see a resultant apparent increase in the number of placed but unanswered calls. The call management system uses the number of available trunks as a factor when calculating the number of calls to dial, if the number of calls in the queue exceeds a certain number, the call management system will interpret the situation as one in which all the trunks are in use. In this situation, the call management system reduces the number of calls to be dialed.

Method, systems, and devices for determining instantaneous heat exchange between an airflow and a heat exchange element of an HVAC system are disclosed. In some embodiments, methods and systems include receiving or otherwise obtaining airflow data, temperature and humidity data. The airflow data may be used to calculate the volumetric airflow rate, and the temperature and humidity data may be processed with enthalpy data to determine the change in enthalpy (Δh) of the airflow after encountering a heat exchange element. The instantaneous rate of heat exchange (E) between the airflow and the heat exchange element may then be determined from the volumetric airflow rate and change in enthalpy.

The invention discloses a method for computing instantaneous time lag and an amplitude error of a real-time hybrid simulation test. The method comprises the following steps: pre-estimating a structural period and nonlinearity degree to select a window function with proper length; carrying out window transform on computed displacement and measured displacement of real-time hybrid simulation according to the selected window function, computing time slag and an amplitude error on the window function as instantaneous time slag and an amplitude error at a final moment of the window function; moving the window function with time, computing instantaneous time slag and amplitude errors at different moments until the test is ended. The method disclosed by the invention can be used for carrying out online estimation on real-time hybrid simulation test effects, thereby avoiding the damage to test components caused by unreasonable compensation, and providing necessary information reference for a compensation method.

The invention discloses a full-duplex energy acquisition relay adaptive antenna selection transmission method. There are three optional schemes for a transceiving apparatus of a relay antenna. According to the first scheme, one antenna which enables gain from a source to a relay channel to reach the maximum is selected from all antennas of a relay for receiving source signals, and afterwards, an antenna which enables gain from the relay to a sink channel to reach the maximum is selected from residual antennas for forwarding source information to the sink. According to the second scheme, transceiving antennas of the relay are directly selected at the same time so that the self-interference channel gain is enabled to be the smallest. According to the third scheme, first of all, one antenna which enables grain from a source to a relay channel to be the maximum is selected from all the antennas of the relay for receiving source signals, and afterwards, one antenna which enables the gain of a self-interference channel to be the smallest is selected from residual antennas for forwarding source information to a sink. According to the invention, a system can adaptively switch the three antenna selection schemes based on calculation of an instantaneous rate, the transmission rate of the system is enabled to the maximized, and the transmission method is applied to some relay networks not convenient for large-scale wired energy supply.

Thermal management in a portable computing device differentiates between a temperature increase caused by a steady workload and a temperature increase caused by an instantaneous workload. If it is determined that a detected temperature increase is caused by a steady workload, then a configuration of thermal parameters is applied that optimizes thermal performance for a steady workload. If it is determined that a temperature increase is caused by an instantaneous workload increase, then a configuration of thermal parameters is applied that optimizes thermal performance for an instantaneous workload.

A portable electronic device (1) is described, in particular of bracelet watch type, comprising at least first and second display members (8 and 9), means (23, 31) for making measurements of a physical magnitude related to the value of the altitude and a memory zone (26) for storing the measured values of the physical magnitude. The electronic circuits (20) of the device are adapted to control the analog display members, in one mode of operation called the rate of climb mode, so that a first display member (9) indicates the instantaneous rate of change of altitude and the second display member (8) indicates the value of a mean rate of change of altitude against appropriate graduations (10) of the device. Such a device finds its principle application in the field of aeronautical sports.

An electronic device that receives a signal indicative of the sound made my a musical instrument in order to determine the instantaneous rate of play of melodic notes on that instrument in terms of notes played per second and display the rate in real time via a display. The regularity of the musician's rate of play is further indicated by the stability of the display reading. Individual sustained melodic notes are identified utilizing differential capacitance and circuit delay time constants to generate a voltage differential in response to a step signal. The device is also selectively operable as a conventional metronome to provide an exemplary sound cue to the musician corresponding to a given number of notes per second and convertible by a switch or foot pedal to monitor the musicians rate of play as he tries to match the demonstrated rate.

At a coarse time-scale, at the start of each frame the choice of TPs to be made active and users to associate with the active TPs are determined by solving an optimization problem. The inputs to the optimization problem are averaged slowly varying metrics that are relevant for a period longer than the backhaul latency. At a the fine time-scale, in each slot each active TP independently does scheduling over the set of users associated with it, without any coordination with any of the other active TPs, based on fast changing information, such as instantaneous rate or SINR estimates.

A method of correcting for overspin in a turbine meter is provided. The turbine meter has turbine rotors positioned in a pipe in which liquid passes therethrough. The turbine rotors rotate in response to movement of the liquid passing through the pipe and sensors mounted proximate thereto count each passage of a rotor by providing an electronic pulse to a microprocessor. The microprocessor calculates the frequency of the electronic pulses which is directly proportional to the total quantity of liquid passing therethrough. If the microprocessor detects a rapid decrease in the frequency of the electronic pulses from the one or more sensors, it begins storing the frequency data therein. The microprocessor determines whether the decrease is due to a total shut off of liquid flowing or to a slow down of said flow. If a slowdown, the stored frequencies are used to compute the total quantity flowing through said pipe. If a shut down, the stored frequencies are deleted and not used to calculate total frequency.

The invention discloses a hybrid discontinuous PWM-based instantaneous power decoupling control method for an open winding permanent magnet synchronous motor. According to the method, instantaneous power required by operation of the motor is decoupled into active power and reactive power, and is provided by a main inverter powered by a power supply and a compensation inverter powered by a capacitor in flying capacitor type double inverters; and the main inverter and the compensation inverter are operated in a unit power factor state and a reactive compensation state respectively, so that a trigonometric function and an anti-trigonometric function required to be used in a traditional power distribution algorithm are avoided, the complexity of the control method is reduced, and the running performance of a system of the open winding motor is improved. For a voltage and current phase relation between alternating-current sides of the double inverters, the invention further discloses a hybrid discontinuous PWM modulation strategy, so that the switching loss of the double inverters is greatly reduced, and the efficiency of the driving system of the open winding motor is improved.

An instantaneous monitoring system for underground tunnel cross sections, which can avoid contact between people and hazardous environments and largely improve measurement precision, is provided. The system adopts PLC224XP as a main controller. A stepper motor driver is connected and used for controlling rotation of a stepper motor, rotation of the stepper motor can drive an impulse laser geodimeter to rotate, and two high-speed counters in the PLC send impulse with different frequencies, so that the instantaneous cross-section area measurement and monitoring can be achieved. An upper computer of the system can accurately and instantaneously display the area of the cross sections. The system has significant meaning for underground tunnel cross section values and the change rule in research of ventilation resistance measurement.

The invention relates to the field of batteries, and discloses an electric quantity metering module group and method for a battery, and an electric car. The method comprises the following steps: collecting the instantaneous voltage and current values of the battery; calculating the instantaneous charging and discharging electric energy of the battery through the collected instantaneous voltage and current values; accumulating the instantaneous charging electric energy and the instantaneous discharging electric energy, and obtaining the residual electric quantity of the battery. The method calculates the residual electric quantity of the battery through the real-time monitoring of the instantaneous voltage and current values of the battery, thereby achieving the accurate estimation of the remaining service time of the battery.