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35 results about "Loss network" patented technology

In queueing theory, a loss network is a stochastic model of a telephony network in which calls are routed around a network between nodes. The links between nodes have finite capacity and thus some calls arriving may find no route available to their destination. These calls are lost from the network, hence the name loss networks.

Training method and apparatus of network models, equipment, and storage medium

The embodiment of the invention discloses a training method and apparatus of network models, equipment, and a storage medium. The training method of network models includes the steps: when a first network model achieves the preset update stopping condition, according to the update result of the first network model, determining the first target network model, and inserting a relay loss network layer in the preset pooling layer in the first target network model so as to determine the second network model; according to the second network model and the relay loss network layer, determining the relay loss function corresponding to the relay loss network layer; according to the second network model and the relay loss function, determining the global loss function of the second network model; andapplying the relay loss function and the global loss function to update the parameters of the second network model so as to obtain the updated second network model. The training method and apparatusof network models can solve the problem that during the network model training process, the high-layer characteristics are over fitting while the low layer characteristics are poor fitting, so that the network model training can become more thoroughly and has higher accuracy.
Owner:GUANGZHOU SHIYUAN ELECTRONICS CO LTD

Multichannel heat exchanger flow distribution prediction method

ActiveCN111597660AEffectively reflect complex coupling relationshipsAccurate and Efficient PredictionGeometric CADDesign optimisation/simulationThermodynamicsEngineering
The invention relates to a multichannel heat exchanger flow distribution prediction method based on computational fluid dynamics (CFD), an artificial neural network and a hydraulic loss network model.Aiming at any multi-channel heat exchanger, the multi-channel heat exchanger is divided into an inlet part, a heat exchange core body and an outlet part, a hydraulic loss network is established, andhydraulic loss of each channel comprises inlet local loss, on-way resistance loss and outlet local loss. The internal on-way loss of the channel is predicted through an empirical correlation; obtaining import and export local loss coefficient sample data through a CFD method. An import and export local loss coefficient prediction model is established through an artificial neural network. The initial flow distribution is given. The total hydraulic loss prediction values of all the channels are consistent through iterative computation, and then the flow distribution can be determined. Accordingto the prediction method, the flow distribution of the multi-channel heat exchanger under different working conditions can be accurately and efficiently predicted, the flow non-uniformity is effectively evaluated, and reference is provided for engineering application.
Owner:XI AN JIAOTONG UNIV

Article anti-loss method and system and electronic tag

The invention discloses an article anti-loss method and system and electronic tag. The anti-loss method includes the following steps: an intelligent mobile terminal establishes a circular linked list according to the total number of electronic tags, the circular linked list includes the serial number and Bluetooth ID of each electronic tag and the article name corresponding to each electronic tag, all the electronic tags establish a Bluetooth connection according to the circular linked list to form an anti-loss network, the electronic tag with the smallest serial number detects a situation of Bluetooth connection with the electronic tags with other serial numbers in real time, and if a certain electronic tag cannot be connected, an article corresponding to the electronic tag is judged to be lost and an alarm is given. The intelligent mobile terminal is no longer an indispensable element in the anti-loss network, the practical range of the article anti-loss system is expanded, and the flexibility of the anti-loss network is improved. The electronic tags can also detect the state of the intelligent mobile terminal, and if the intelligent mobile terminal is lost, the electronic tag with the smallest serial number gives an alarm and prompt, thereby realizing mutual detection of the electronic tags and the intelligent mobile terminal and an alarm and prompt are given.
Owner:GEER TECH CO LTD

Low-loss network type optical receiver and control method

InactiveCN104811249ALarge optical power acceptance rangeOutput level can be controlledElectromagnetic receiversTransmission monitoring/testing/fault-measurement systemsAutomatic controlControl signal
The invention relates to a low-loss network type optical receiver and a control method thereof. The low-loss network type optical receiver successively comprises a photoelectric conversion circuit, a first amplification circuit, an automatic control circuit, a second amplification circuit, an attenuation control circuit, an equalization control circuit, a third amplification circuit, a temperature compensation circuit, a fourth amplification circuit and a level demodulation circuit, and further comprises a power supply module, a display circuit, a button circuit, an ARM chip network management controller, an Ethernet network and a computer, wherein the photoelectric conversion circuit, the level demodulation circuit and the button circuit input signals to the ARM chip network management controller, the ARM chip network management controller outputs control signals to the automatic control circuit, the attenuation control circuit and the equalization control circuit, the circuits employ low-loss chips, the amplification circuits realize multistage amplification, the heating capacity of a product is reduced, and the service life of the product is prolonged. The optical power receiving scope is large, the output level is controllable, the construction debugging is convenient, the operation state of equipment can be monitored in real time, and remote management can be realized.
Owner:上海新纳通信技术有限公司

Low-network-loss distribution ring network open-loop operation site selection method

The invention discloses a low-network-loss distribution ring network open-loop operation site selection method. The method comprises the steps that: obtaining an equivalent circuit of a distribution ring network, introducing a flexible interconnection switch, and dividing the switch into two systems; obtaining an initial line loss model of the power distribution network; obtaining a power distribution network line loss model; obtaining an optimal current active component and an optimal current reactive component output by the flexible interconnection switch under minimum line loss according tothe line loss mathematical expression of the power distribution network; obtaining a resistance distance, an active current moment and a reactive current moment of each node in the two divided systems; calculating the combined active current moment and the combined reactive current moment of the two systems, and obtaining the relationship between the combined active current moment and the reactive current moment and the optimal current active and reactive components; and determining an optimal opening point of the open-loop operation mode of the power distribution network with minimum networkloss as an objective according to the optimal current active component. According to the method of the invention, the relation between the loss of the power distribution network and load distributionimbalance degree can be obtained through the combined current moments, so that the optimal open-loop operation mode with the minimum loss network of the power distribution network is obtained.
Owner:GUIZHOU POWER GRID CO LTD

Low-loss network information transmission device

The invention provides a low-loss network information transmission device. The low-loss network information transmission device comprises an enclosure, a circuit board and several pins; a network information transmission circuit is arranged on the circuit board; the network information transmission circuit comprises a first transformer, a second transformer and a signal control chip; two input ends of the signal control chip are separately connected with two input ends of the first transformer; the first transformer comprises a first magnetic core, a first primary coil wound on the first magnetic core, and a first secondary coil wound on the first magnetic core; the first primary coil is a stranded wire made of multiple strands of wires; and the first secondary coil is a stranded wire madeof multiple strands of wires. According to the low-loss network information transmission device provided by the invention, signals can be enhanced through the first transformer and the second transformer; the transmission distance is increased; therefore, the chip side is isolated from outside; the anti-interference capability is improved; the signal control chip is protected; the stranded wiresmade of multiple strands of wires are used as the first primary coil and the first secondary coil; insertion loss can be reduced; and thus, loss can be reduced.
Owner:SHENZHEN ZHENHUA FU ELECTRONICS +1
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