590 results about "Operation point" patented technology

A system and method for improving both coding efficiency and decoding accuracy in scalable video coding involving discardable lower layer adaptations, where applications can omit transmission of unused data for inter-layer prediction for all layers below an operation point of receivers. Indicator flags are utilized to avoid transmitting syntax elements that must be set to fixed values. In addition, padding algorithms or additional encoding constraints are applied to the encoding process.

A method and apparatus for estimating packet loss rate are described including calculating a real packet loss rate in a time slot at the end of the time slot, estimating average packet loss rate for a subsequent time slot, estimating variance of packet loss rate for the subsequent time slot and estimating the packet loss rate for the subsequent time slot. A method and apparatus and also described for dynamically allocating available bandwidth for video multicast including selecting an intra-frame rate, determining a packet loss rate threshold, receiving user topology information, receiving channel conditions for each user, determining an optimal operation point for encoding and transmitting video frames in a subsequent time slot, adapting dynamically quantization parameters and a forward error correction code rate, encoding the video frames using the quantization parameters and applying forward error correction code with the forward error correction code rate to data packets of the video frames to generate forward error correction packets.

A control apparatus of a hybrid vehicle having a first drive unit, a second drive unit, a HV battery, a shift control element, a battery state detection element, and a shifting-time drive control element. Furthermore, in the control apparatus, a battery balance control element is formed by an engine control element, a first motor control element, a second motor control element and the shifting-time drive control element. If the shift control element determines there is a need for shifting carried out by a stepped transmission, the battery balance control element calculates the amount of increase/decrease in the amount of charge of the HV battery in accordance with the state of the HV battery, and changes the engine operation point on the basis of the calculated amount of increase/decrease in the battery charge, prior to the shifting.

An embodiment of the invention is a predistortion approach to linearize a power amplifier by setting initially the static operation point of the power amplifier in the cut-off region. The architecture is based on the analog-digital combination by a multiplier and digital predistortion control circuit. The predistortion system generates an adaptive output signal to control the RF modulated signal that is the input signal of the power amplifier. The controlled and predistorted signal can contribute to drive a power amplifier with the cut-off static operation point into its amplifying region and simultaneously correct the non-linear distortion when the power amplifier operates to amplify an RF signal.

A method of optimizing the operation point of a laser, including characterizing the laser and controlling the different laser sections by varying the currents injected into the respective laser sections. The method includes sensing discontinuities that occur at mode jumps in a signal by utilizing a detection device that is firmly connected to the laser. Control of the different laser sections is effected by means of a control unit. Different control current combinations and the signal delivered by the detection device are provided to the control unit, which causes the control unit to detect the mode plane of the laser. At least a part of a mode plane, or several mode planes, are stored in a memory connected with the control unit, and the control unit controls the different laser sections so that the laser will operate at the desired operation point.

The invention relates to a routing inspection system based on an intelligent robot of a transformer station and a method for monitoring the operation of the transformer station and can meet all-weather working requirements. The method comprises the following steps of: 1) remotely taking over the right of control of an intelligent routing inspection robot; 2) issuing an equipment detection command to the intelligent routing inspection robot of the transformer station; 3) automatically navigating the intelligent routing inspection robot to an operation point by using an optimum path specification, and sending back a real-time monitoring video; 4) after an operator is in place on the scene, waiting for an operation command; 5) issuing a single-operation instruction to the operator; 6) monitoring the operation of a scene person by using the video of the intelligent routing inspection robot; 7) remotely controlling the intelligent routing inspection robot to move to an appropriate position or adjusting a holder of the intelligent routing inspection robot to be at an appropriate angle; 8) after the operation of the steps is finished, waiting for the next operation instruction; and 9) after all operation tasks are finished, controlling the intelligent routing inspection robot to automatically move back to a charging room for charging, and finishing the operation.

A converting device with multiple input terminals and two output terminals is disclosed for converting Direct Current (DC) power from a power source to Alternating Current (AC) power. The converting device includes N pairs of input electrodes (N is an integer and N≧2), configured to receive the DC power from the power source, N maximum power point trackers, each coupled to one pair of the N pairs of input electrodes, configured to track a maximum power operation point for the DC power received from the one pair of the N pairs of input electrodes, two DC/DC converters, each coupled to one of the N maximum power point trackers, configured to convert a DC voltage received from the one of the N maximum power point trackers, a DC/AC inverter, coupled to the N DC/DC converters, configured to convert N DC voltages provided by the N DC/DC converters to an AC output signal, and a controller, coupled to the N DC/DC converters and the DC/AC inverter, configured to control the DC/DC conversion operation of the N DC/DC converters and the DC/AC conversion operation of the DC/AC inverter.

The invention provides a deep Q network based regional power-grid operation point dispatching optimization method. The method comprises the steps that a dispatching configuration of a regional power-grid operation point dispatching center is determined; a dynamic decision process for dispatching operation points of regional power grid is modeled into a corresponding Markov decision process model which comprises state, action, cost and optimization target function; the deep Q network is used to carry out strategy resolution on the Markov dynamic decision process; the operation point of the regional power grid comprises a routine thermal power set output of a next dispatching period, thermal power set output and the flexible load reduction amount; and dispatching of the operation point of the region power grid comprises, at least, that the power grid operation point in the next dispatching period is determined dynamically according to wind power and load power short-term prediction information and operation point information in the present period. Thus, effective response to randomness of the new energy output and load demands can be made, source-load interactive dispatching potential gives a full play, dynamic balance of the power of the regional power grid is maintained, and the operation efficiency of the power grid system is improved.

This invention relates to method for identifying and confirming an identity by the soundwave information of mankind including a model training method and a soundwave identification method characterizing in that every speaking person makes up of soundwave model: M=***, the character vector sequence to be identified x'={X1,...XT} matching with the speaking person soundwave model M=*** gets marks (log likelihood) as 1:s(x'/M)=***. This invention can adjust threshold value of an operation point according to different requirements to reach the highest accurate rate.

The invention belongs to the field of energy and coal mine safety, and particularly relates to a coal mine down-hole drilling penetration improvement method based on a controllable shock wave technology. The method aims at solving the problems of high labor intensity and low safety of an existing gas treatment mode. Controllable shock wave generation equipment is pushed to the interior of a drilling hole, and after a hole opening sealing device is installed at a hole opening of the drilling hole, water is injected to the drilling hole; after the drilling hole is fully filled with the water, operation is conducted segment by segment, the middle of each operation segment is used as an operation point of shock waves, and repeated impact is conducted on each operation point multiple times. Under the effect of the injected water in the hole, the shock wave generation equipment does not need to work under the environment with explosive gas, and the shock waves are also efficiently coupled toa coal bed.

The invention provides a shield machine and an anterior shield system thereof. The system comprises an anterior shield body, an excavation device, a conveyor, and a partition plate, wherein the anterior shield body has a cylindrical structure; the excavation device is arranged on fixing components of the shield machine and a head of the excavation device is used for performing multi action excavation operation on different operation points on an excavation surface; and the conveyor is used for discharging dregs excavated by the head of the excavation device, a first end of the conveyor is arranged below the excavation device and a second end of the conveyor is arranged on the rear part of the first end; and the head of the excavation device and the first end of the conveyor are positioned in front of the partition plate, the second end of the conveyor is positioned on the rear part of the partition plate, and the partition plate is provided with a sealing door which can be opened and closed. The invention can avoid the mud cake agglomeration of a cutter, rolling of the shield body, improved treatment of dregs and pressurized cabin entering operation and has the advantages of quick construction progress, high stability and adaptability and the like.

The invention discloses a control method for the maximum power point tracking (MPPT) of a photovoltaic power system. For the control method, on the basis of the traditional MPPT method, a judgement basis for the output characteristic change of the photovoltaic array is added, and a control strategy for the MPPT after the output characteristic change is improved. When the output characteristics of the photovoltaic array are remarkably changed due to a shadow or an assembly fault and the like, an operation point (U, I) on the I-U output characteristic curve of the photovoltaic array is rapidly adjusted to a straight line for connecting the origin of coordinates with a point (Uoc, Isc), and then tracking is performed to the maximum power point of the photovoltaic array starting from the operation point by using the traditional MPPT method. With the adoption of the control method for the MPPT of the photovoltaic power system disclosed by the invention, tracking can be rapidly and accurately performed to a global maximum power point on a multimodal output P-U characteristic curve of the photovoltaic array, and the fluctuation on the output power of the photovoltaic array due to the MPPT method during the tracking process is slight, so that the control method for the MPPT of the photovoltaic power system is good in application prospect.

A power distribution method for electric vehicle driven by two power sources includes executing a first power distribution law by a vehicle control unit, wherein the first power distribution law sets a distribution ratio according to a vehicle speed of the electric vehicle, a torque demand, and a current gear of a transmission. The powers outputted by first and second motors are adjusted according to the distribution ratio such that the first and second motors can operate at the most efficient operation points to increase the operational efficiency of the electric vehicle driven by two power sources.

The invention provides a method for controlling stroke lengthening of a serially connected pluggable electric vehicle. The system adopted by the method consists of an engine, a control unit EMS of the engine, a generator, a controller IPU of the generator and a whole vehicle controller HCU. The controlling method comprises the following steps of: (1) setting starting conditions of a stroke lengthening module; (2) starting the stroke lengthening module; and (3) controlling operation of the stroke lengthening module. In the method, a small starting motor which starts the engine can be saved, the engine can be directly started by the generator with high efficiency so as to reduce cost and save arrangement space of parts and components, simultaneously a command is sent to the IPU through the HCU to ensure the generator starts the engine, so that the success rate of one-time start is higher, and the starting effect and the communication command are simpler compared with those obtained whenthe small starting motor starts the engine. Meanwhile, in the method, several operation points with better economy can be selected on an external characteristic curve of the engine so as to reduce energy consumption and meet the requirement of electricity utilization of the whole vehicle.

The present invention provides a method for determining an optimal operation point with respect to SOC in a hybrid electric vehicle, in which, as a conversion factor (fuel equivalent factor) that can quantitatively compare the amount of fuel consumed by an engine with electrical energy consumed by a motor, a factor for obtaining a desired final SOC with respect to an initial SOC is determined, and an optimal operation state based on a current SOC of the hybrid electric vehicle is determined using the factor, thus improving fuel efficiency of the hybrid electric vehicle.

A method and an apparatus optimize performance of a motor drive system. The method according to one embodiment comprises: selecting a property for a rated operation point; selecting inverter system characteristics and motor characteristics such that a motor drive system including an inverter system having the selected inverter system characteristics operatively connected to a motor having the selected motor characteristics will have a rated operation point exhibiting the property; providing an inverter system having the selected inverter system characteristics; operatively connecting a motor having the selected motor characteristics to the inverter system; and minimizing current of the motor drive system including the motor operatively connected to the inverter system in entire operating range of the motor drive system.

The invention relates to a method and system for monitoring a process based on slow feature analysis. The method comprises the steps of reading a slow feature model and a monitoring model, reading in an online measurement value of a process variable, forming an input vector, and inputting the input vector into the slow feature model to obtain an online real-time estimation value of a slow feature vector s(t); inputting a vector s1:M (t) formed by front M slow features into the monitoring model to obtain instant evaluation values of T<2> and S<2>; comparing T<2> with Ta<2> and S<2> with Sa<2>, judging that the process is shifted from a steady state operation point if T<2> is greater than or equal to Ta<2>, and judging that the process is subjected to dynamic feature variation if S<2> is greater than or equal to Sa<2>. According to the technical scheme, the shift of the steady state operation point can be monitored, and the dynamic feature variation of the process can be effectively monitored.