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53 results about "Transmission dynamic" patented technology

Joint use of multi-carrier and single-carrier multiplexing schemes for wireless communication

A communication system that facilitates transmissions in accordance with a single-carrier (SC) multiplexing scheme, a multi carrier (MC) multiplexing scheme or a combination thereof is disclosed. Based on various factors such as attributes associated with a UE (user equipment) or availability of resources, a base station can signal to the UE an appropriate multiplexing scheme to be adopted for particular transmissions. The UE can be scheduled for transmission in a semi-static mode wherein the UE employs the transmission scheme for a particular time interval or it may change the mode dynamically for different transmissions. For transmissions from the UE comprising a plurality of data streams with dissimilar attributes, the base station implements a MIMO (multiple input multiple output) system for the UE. This facilitates a UE to dynamically switch between or simultaneously adopt the various multiplexing schemes for communications and thereby fully utilize advantages associated with the different schemes.
Owner:QUALCOMM INC

Physical analog test apparatus for canal pollutant transmission under temperature-hydraulic coupling action

InactiveCN101477106AAchieve recyclingSolve unmanageable puzzlesEarth material testingData acquisitionEngineering
The invention discloses a physical simulation testing device used in graff contaminant transmission under the action of temperature-hydraulic coupling. The testing device comprises a simulation container, an air pressure control device, a temperature control device, a circulating water system and an online control and monitoring system. The testing system can realize physical simulation test of transmission dynamic characteristics of contaminants in rivers, aqueducts, sewage trenches and surrounding soil and ground water, and integrate monitoring, control and data acquisition; moreover, the testing system realizes real-time display and intelligent control of water level, temperature and pressure variations in the testing system, and carries out overall process acquisition, analysis and visualized input and output on testing data through a data acquisition program. The testing system has the characteristics of reasonable structure, convenient operation, high precision of testing data, quick automatic data acquisition, short testing cycle as well as ideal modularization, openness and expansibility, and the like. In addition, the testing system provides parameter basis to disclose the transmission mechanism of contaminants in soil and ground water under complicated environmental conditions and analyze migration and transformation rule, and also provides technical support for appraising pollution control and treatment technical proposals.
Owner:INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI

Multipath parallel transmission dynamic decision-making method based on path quality

The invention discloses a multipath parallel transmission dynamic decision-making method based on path quality. In consideration of the influence on the whole network transmission performance by the path quality difference, the method comprises the following steps: firstly sending a detection data packet to measure four parameters for deciding the path quality in real time: delay, jittering, packet loss probability and cache occupation rate, feeding back the measured data to a sending end, and processing the measured data through a TOPSIS method in a sending end cache area, selecting out the most appropriate path combination for data transmission, and then sending the to-be-transmitted data packet, when the data packet arrives the receiving end, sending the selected path with the minimum delay to a feedback ACK to a receiving end. The design disclosed by the invention sufficiently gives full play to the advantage of the dynamic decision-making path, the network throughput out is improved, and the efficient data transmission is realized.
Owner:GUILIN UNIV OF ELECTRONIC TECH

Method of managing coexisting packet streams

The invention concerns a method of managing coexisting packet streams (100, 110) in a wireless communication system, and a corresponding controller and a mobile terminal. A first packet stream (110) of the coexisting packet streams (100, 110) requires transmission resources of the wireless communication system at fixed time intervals, and a second packet stream (100) of the coexisting packet streams (100, 110) requires transmission resources of the wireless communication system at dynamically determined time intervals. A schedule defining allocations of transmission resources for the first packet stream (110) is set up. A request for an initial grant of transmission resources for a transmission of a data packet (101) of the second packet stream (100) is issued. In the process of allocating transmission resources to the second packet stream (100), the controller analyses the schedule of transmission resources allocated to the first packet stream (110) and thereby determines whether a retransmission (102, 103) of the data packet (101) associated with the second packet stream (100) is possible to collide with a transmission of a data packet (111, 112) associated with the first packet stream (110) according to the schedule. The controller transmits a parameter specifying a number N of retransmissions (102, 103) possible without such collision as part of the initial grant of transmission resources to the mobile terminal.
Owner:ALCATEL-LUCENT USA INC

Partitioning of frequency resources for transmission of control signals and data signals in sc-fdma communication systems

A method for the partitioning frequency resources used in the transmission of control signals and data signals by user equipments in a communication system. The control signals and data signals are for periodic transmission and dynamic transmission. Also provided is an apparatus and method for user equipments to determine the first frequency unit available for the transmission of dynamic control signals, such as acknowledgement signals associated respective reception of data signals configured through a scheduling assignment by a serving Node B. The utilization of the operating bandwidth is maximized by avoiding fragmentation and facilitates the achievement of reception reliability targets particularly for control signals.
Owner:SAMSUNG ELECTRONICS CO LTD

Method applied in alternating current/direct current large power grid transient analysis of imitating direct current response

The invention discloses a method applied in alternating current/direct current large power grid transient analysis of imitating direct current response. Fault simulation is disposed in alternating current/direct current large power grid electromechanical transient simulation software. Faults are simulated in the power grid electromagnetic transient software, and contravariant station busbar voltage and the result of the electromechanical transient simulation software are in basic accordance. Power wave form of the direct current is simulated. The electromechanical transient simulation and differences of the direct current wave form simulated by the electromechanical transient simulation software are in comprehensive analysis under fault conditions. The faults are simulated in the electromechanical transient simulation software meanwhile a direct current power modification card is used for modifying a reference value of the direct current power. After the simulated comparison, power curve of the direct current is consistent with the trend of the electromagnetic transient simulation results. Multi-chapter direct currents are simulated. A system is in electromechanical transient stable simulation. The direct current transmission dynamic response is imitated to obtain systematical stable features of the alternating current/direct current. The method applied in the alternating current/direct current large power grid transient analysis of imitating the direct current response is easy to operate, quick in computation speed, high in accuracy degree and suitable for using in the alternating current/direct current interconnection big power grid electromechanical transient simulation analysis.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD

System and method for streaming of dynamic weather content to the desktop

A method, system and program product for streaming of dynamic information content over an interactive media such as the Internet. The dynamic content, such as dynamic weather data, is collected from a plurality of collection sources such as geographically distributed local weather reporting stations. The data information can be relatively static or dynamic, constantly changing data. The dynamic content is stored in databases maintained on a direct access storage device at the dynamic content server. The selection of dynamic content to be transmitted to the end user client is based on a demographic profile that is completed at the time of end user client registration and which precedes delivery of any selected content in response to end user client requests. An application resident on the dynamic content server streams selected content simultaneously to a plurality of end user client devices for each end user client request. An application resident on each end user client device generates a plurality of processing threads for a series of independent commands, each of which is transmitted to the dynamic content server at specified preset intervals and generates a server-selected response. In a weather content collection and delivery embodiment, local, real-time weather data can be received continuously from thousands of weather reporting stations, and transmitted simultaneously by the weather content server to millions of end user desktop clients, with each user receiving current weather data that is generated from a nearby weather collection station.
Owner:XAD

Method and device for wind generating set zero-transition dynamic grid connection

The invention discloses a method and a device for wind generating set zero-transition dynamic grid connection, and relates to the field of new energy resources. The method comprises the steps of carrying out wind generating set AC / DC converter and DC / AC converter rectification and inversion, acquiring electric physical quantity data of a power grid, a set and a grid-connected switch, detecting zero-transition dynamic grid connection conditions, carrying out grid-connected switch and wind generating set grid-connected inverter coordination control, and carrying out active power flow direction detection and zero-transmission dynamic grid connection control. The device disclosed by the invention is provided with a zero-transition dynamic grid connection signal unit, a zero-transition dynamic grid connection condition detection and active power flow direction detection unit, an electronic power switch unit and a zero-transition dynamic grid connection control unit. Compared with the prior art, the method and the device have the characteristics that a filter is energy-saving, the wind power generation efficiency is improved, the grid voltage quality is improved, and the service life of the grid-connected inverter is prolonged.
Owner:WUHAN UNIV

Water-transmission dynamic scaling experiment loop and method for non-metal pipe

InactiveCN108732304AMinimizes the effects of foulingExperimental temperature is uniformMaterial analysisEngineeringAqueous solution
The invention discloses a water-transmission dynamic scaling experiment loop and method for a non-metal pipe. The loop and the method are used for carrying out a simulation experiment on the scaling characteristics of oil-field extraction and transportation pipelines. The loop comprises a liquid storage system I, a power system II, a flow adjusting system III, a pressure buffer system IV and a shunt-wound testing system V, wherein the liquid storage system is used for supplying a water solution with a uniform and stable temperature; the power system is used for supplying power to the experiment loop; the flow adjusting system is used for adjusting the flow of the water solution entering a test pipe section; the pressure buffering system is used for reducing the influence caused by the pressure fluctuation to the scaling of the test pipe section; and the shunt-wound testing system is used for measuring the variations of the scaling amounts of different tubular products along time. The invention further provides a method for carrying out an experiment test by virtue of the loop. According to the method, the variation of the scaling amounts along time under the conditions of differenttubular products, flows, ion concentrations, temperatures and the like can be measured, the basis is provided for the prevention and treatment on the site scaling of the oil field, and the method canbe used for developing and evaluating novel scale inhibitors.
Owner:SOUTHWEST PETROLEUM UNIV

Flexible DC transmission dynamic stability determining and controlling method

The invention discloses a flexible DC transmission dynamic stability determining and controlling method which comprises the steps of: unlocking a converter station of a flexible DC transmission system, and allowing the flexible DC transmission system to operate in a non-island control mode; extracting corresponding parameters of the flexible DC transmission system, wherein the parameters include an AC system voltage effective value Ut0, a flexible DC external reactive power Qvsc0, a gain kp of a phase locked loop PLL, and a proportional integral time constant ki of the phase locked loop PLL; calculating a short-circuit ratio SCR, the per-unit value of Ut0 and Qvsc0; calculating a key stable component; and checking the sign of the key stable component and determining the stability of the flexible DC transmission system. The method of the invention only needs to simply calculate the value of the key stable component, determines the stability of the system by the sign of the value, is simple and easy, and is beneficial to engineering practice.
Owner:SICHUAN UNIV

Test method for automotive transmission dynamo-static coupling torsional fatigue

The invention discloses a test method for automotive transmission dynamo-static coupling torsional fatigue. The method comprises steps of collecting transmission dynamic torque during car driving; installing the car transmission on a test system; calculating a frequency responding function of the system; calculating first excitation signals of a torsional actuator; exciting the torsional actuator by using the first excitation signals, collecting response signals of a torsional sensor, calculating responding error, calculating drive signal correction quantity corresponding to the error and recording a final drive signal when the error is no more than 5%; and regarding the final drive signal as input and conducting the torsional fatigue test of the car transmission. By the aid of the hydraulic servo torsional actuator and the remote parameter control, the dynamic torque of the car transmission during actual driving can be simulated accurately indoors under the condition of static torsion, and the test based on actual driving torsion has the advantages of being simple, efficient and accurate.
Owner:重庆理工清研凌创测控科技有限公司

WeChat network evolutionary model construction method based on complex network

The invention discloses a WeChat network evolutionary model construction method based on a complex network. The method mainly comprises two stages, namely network initialization and network evolutionary generation. At the network initialization stage, the number of network initial nodes and the connection mode of the nodes are given; at the network evolutionary generation stage, a random connection mechanism and a preferential connection mechanism are adopted respectively. According to the method, a core evolutionary mechanism adopted in the WeChat network forming process is fused, and the generated evolutionary network can truthfully display topological characteristics of a real WeChat network and cannot be restricted by the network size. Thus, the evolutionary network can be used for analyzing various topological characteristics of the WeChat network and can also be used for studying the transmission dynamic mechanism of information in social networking. Based on this, a real network topological structure can be improved, a network protocol is optimized so that the transmission efficiency of the network topological structure can be improved, and meanwhile the method is beneficial for preventing and controlling propagation of Internet rumors so as to reduce damage caused thereby.
Owner:ENG UNIV OF THE CHINESE PEOPLES ARMED POLICE FORCE
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