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200results about How to "Reduce disorder" patented technology

Multi-path transmission control terminal and method for supporting multi-service data transmission

ActiveCN105933232AMeet different transmission needsMaximize data throughputData switching networksData streamNetwork communication
The invention relates to a multi-path transmission control terminal and a method for supporting multi-service data transmission, and belongs to the technical field of network communication. The terminal is arranged on an end point of data transmission and comprises a multi-path session management module, a path management module, a flow division module, a path selection module, a substream sending control module, a substream receiving control module, a rectification recombination module, a path transmission quality report module and a path evaluation module. When data stream of an upper application is received, the data stream is divided into stream blocks, a path is selected for each stream block, stream blocks dispatched to the same path form a substream, the stream blocks are further divided into transmission units and are packaged into multi-path transmission packages and are transmitted to an opposite terminal, according to the path transmission quality fed by the opposite terminal, a path selection strategy is dynamically adjusted; when the multi-path transmission data packages are received, substream data is recombined and is further recombined into data streams and the data streams are transmitted to the upper application. The terminal and method can meet different transmission requests of various business types, and the multi-path transmission efficiency is improved.
Owner:NORTHEASTERN UNIV

Gas pipeline drag reducer and preparation thereof

The invention relates to a gas pipeline drag reducer used in gas and particularly natural gas conveying pipeline drag reduction and a preparation method thereof, relating to a macromolecular compound composition and the pipeline system technical field. The gas pipeline drag reducer is characterized in that: the drag reducer is synthesized by long-chain acid and enamine according to a molar ratio of between 1:1 and 2.2:1. The preparation method comprises the following steps that: the long chain acid in proportional quantity is added in a reaction container; a heater is started so as to carry out heating while stirring; when temperature reaches to 100 DEG C, the long chain acid is melted, and the enamine in proportional quantity is added at the same time; nitrogen is fed in to carry out protection, and the mixture is preheated to between 120 and 140 DEG C; after preheating is finished, programmed heating is carried out till temperature is increased to between 210 and 220 DEG C; a stirrer is removed and a vacuum pump is connected to carry out evacuation for 2 to 4 hours; when reaction is finished, brown solid crude product can be obtained after cooling down. The gas pipeline drag reducer has obvious drag reduction effect on gas pipelines, direct source of raw materials, simple operation, moderate reaction conditions, relatively simple process and low requirements on equipment, and is easy to realize large-scale industrialized production.
Owner:PETROCHINA CO LTD

Optimization method of efficient throughput capacity of multipath parallel transmission system

The invention relates to an optimization method of an efficient throughput capacity of a multipath parallel transmission system, and belongs to the technical field of communication. The optimization method comprises the following steps of step 1) estimating propagation time delay on each concurrent link by utilizing a Kalman filtering algorithm in the multipath parallel transmission system; step 2) of deducing a data packet ordered propagation constraint condition in the multipath parallel transmission system; and step 3) of adjusting a congested window of a sending end based on the deduced propagation time delay estimation result and the deduced data packet ordered propagation constraint condition. The optimization method of the efficient throughput capacity of the multipath parallel transmission system provided by the invention can adaptively adjust the size of the congested window of each sub-stream based on the propagation time delay and the data packet ordered propagation constraint condition, thereby balancing load on each link, reducing the maximum time delay difference between the concurrent links, reducing data packet disorder and increasing the efficient throughput capacity of the multipath parallel transmission system.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Disorder analyzing method for multipath parallel transmission system

The invention relates to a disorder analyzing method for a multipath parallel transmission system and belongs to the technical filed of communication. The method comprises the following steps: step 1), in the multipath parallel transmission system, after a data packet is transmitted to a sending end by an application layer, the sending end is used for sending out the data packet immediately, and the data packet reaches a receiving end after path propagation time delay d; step 2), analyzing is performed on the disorder of the multipath parallel transmission system, and the probability of the disorder caused during a package transmission procedure is calculated. Further, impacts caused by transmission time delay of the sending end and the queue time delay on the phenomenon of disorder of the data packet can be further considered, and the probability of disorder caused during the data packet transmission procedure is calculated. The disorder analyzing method for the multipath parallel transmission system, provided by the invention, can be used for estimating the probability of the disorder of the data packet during a multipath parallel transmission process under the current network environment, and by reasonably controlling and reducing the phenomenon of data disorder, the performance of multipath parallel transmission in a heterogeneous network can be improved.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Preparation method of cationic dyeable flame-retardant polyester resin

The invention discloses a preparation method of cationic dyeable flame-retardant polyester resin. The manufacturing method is characterized by comprising the following steps: performing an esterification reaction on a halogen-free copolymerized phosphorus-based flame retardant, ethylene glycol and a composite catalyst to prepare an esterification solution of the halogen-free copolymerized flame retardant; performing ester exchange reaction on sulfoisophthalic acid dimethyl ester and the ethylene glycol to prepare a sulfonate-based bis(hydroxyethyl) isophthalate solution; performing an esterification reaction on terephthalic acid (or dimethyl terephthalate), the ethylene glycol and auxiliaries, then adding a catalyst, a stabilizer, the auxiliaries, the esterification solution of the phosphorus-based flame retardant (or a prepolymer solution of the phosphorus-based flame retardant) and the sulfonate-based bis(hydroxyethyl) isophthalate solution, performing condensation polymerization reaction, and cooling and dicing after the end of reaction to prepare the cationic dyeable flame-retardant polyester resin. The cationic dyeable flame-retardant polyester resin prepared by the method disclosed by the invention has the characteristics of good spinnability, polyester fiber cationic dye boiling dyeing under normal pressure conditions, complete chromatogram and strong dye adhesion.

Slit type fishway experimental device with stages of falling sills and grooves

InactiveCN102176295AImprove applicabilityHigh degree of regulation automationHydrodynamic testingEducational modelsWater volumeThree stage
The invention relates to a slit type fishway experimental device with a plurality of stages of falling sills and grooves. The device mainly comprises a water inlet system connected with a water circulation system, a water retaining system connected with the water inlet system, and a water outlet system connected with the water retaining system. A water flow flows into the water inlet system through a ground water tank of the water circulation system, flows into a water tank of the water retaining system through a water flow buffer tank in the water inlet system, flows from a tail pond in the water inlet system into an underground pond through the water tank, and flows back into the ground water tank of the water circulation system through a draft tube.The water flow of the ground water tank is controlled by an upstream manual control valve, and the water flow of the tail pond is controlled by a downstream manual control valve. The device provided by the invention adopts the water circulation system, can recycle experimental water and reduces an experimental water volume and cost; three stages of falling sills are in fit with grooves so as to relatively more equally distribute energy dissipation to each energy dissipation part, improve the energy dissipation efficiency and reduce the degree of disorder of the water flow; and in a controllable range of the water flow, the flow rate and flow regime of the water flow are relatively closer to natural conditions, so a fish putting experiment meets actual conditions.
Owner:SICHUAN UNIV

Vertical clearance type fish passing effect experimental system

InactiveCN103343524AReduce experimental water consumptionReduce experiment costHydraulic modelsWater flowEngineering
The invention relates to a vertical clearance type fish passing effect experimental system which comprises a water inlet system connected with a water circulation system, a water blocking system connected with the water inlet system and a water outlet system connected with the water blocking system. The water circulation system comprises a water suction pump, an overground water pool, an underground water pool, an upstream control valve and a downstream control valve. The water inlet system comprises an upstream flashboard and an upstream fish resting pool. The water blocking system is composed of a plurality of stages of fishponds. The water outlet system is composed of a downstream fish resting pool, a downstream water flow buffering box and an underground water pool. The vertical clearance type fish passing effect experimental system can be used for studying and analyzing hydraulics turbulent energy dissipation problem, a fish migration problem and hydraulics experimental model demonstration, due to the fact that the experimental system and an actual fishway partial project are built with a proportion of 1:1, the flow regime of the water flow in a fish passing facility is truly reflected, and the reliability and the accuracy of a water flow field in a fishway and the analysis of the fish passing effect are further guaranteed.
Owner:SICHUAN UNIV

Railway rescue station with smoke prevention and exhaust and personnel emergency evacuation functions

The invention discloses a railway rescue station with smoke prevention and exhaust and personnel emergency evacuation functions. The railway rescue station is divided into an upper-layer structure, amiddle-layer structure and a lower-layer structure; the upper layer of the station is a smoke exhaust channel; the middle layer of the station is a rescue station body; the lower layer of the stationis an evacuation channel; a tunnel in the longitudinal range of the railway rescue station is composed of an upper-layer train tracking area and a lower-layer evacuation layer, and smoke exhaust portsare evenly formed in the upper portion of the inner side of a track of the upper-layer train tracking area; each smoke exhaust port is internally provided with a remote control smoke exhaust air valve; each smoke exhaust port is provided with a fire smoke detection module; the opposite sides of each smoke exhaust port are provided with directional jet fans; the upper portion of the train trackingarea is provided with mobile jet fan groups and movable fire extinguishing bins separately; escape staircases are arranged between the upper-layer train tracking area and the lower-layer evacuation layer. The railway rescue station mainly solves the problem that an evacuation platform cannot be arranged on a conventional rescue station for two two-hole single-line tunnel with short transverse distance, and the efficiency of smoke exhaust and personnel evacuation is improved.
Owner:HEFEI UNIV OF TECH

Carbonylation reactor of device for synthesizing gas to produce ethylene glycol

The invention discloses a carbonylation reactor of a device for synthesizing gas to produce ethylene glycol. The carbonylation reactor comprises a shell, and an air inlet, a refrigerant outlet, an exhaust port and a refrigerant inlet mounted on the shell, wherein a gas distributor is arranged at the air inlet; a gas collecting cylinder and a distribution cylinder are mounted in the shell, and an annular gap is formed between the distribution cylinder and the shell; a reaction chamber is formed between the gas collecting cylinder and the distribution cylinder, and a heat exchange pipe communicating the refrigerant outlet and the refrigerant inlet is arranged in the reaction chamber; the gas collecting cylinder comprises a cylinder part comprising an upper cylinder part, a middle cylinder part and a lower cylinder part which are sequentially connected and communicated with each other from top to bottom; in the up-down direction, the middle cylinder part is located in the middle of the reaction chamber; only the cylinder wall of the middle cylinder part of the gas collecting cylinder is provided with a gas collecting hole which is communicated inside and outside of the gas collectingcylinder. The invention can ensure that the loading amount of a catalyst in the carbonylation reactor is effectively increased in the case of a low pressure drop, thereby reducing the manufacturing cost of the reactor and improving the single production capacity of the reactor.
Owner:NANJING JUTUO CHEM TECH

Air traffic control method based on 4D flight path operation

The invention relates to an air traffic control method based on 4D flight path operation. The method is implemented through an air traffic control system, and the air traffic control system comprises a data communication module, a monitoring data fusion module, an airborne terminal module and a control terminal module, wherein the monitoring data fusion module is used for fusing air control radar monitoring data with automatic related monitoring data and providing real-time flight path information for the control terminal module; the control terminal module comprises a preflight conflict-free 4D flight path generation submodule, a flight medium and short term 4D flight path generation submodule, a real-time flight conflict monitoring and alarming submodule and a flight conflict resolution 4D flight path optimization submodule. According to the air traffic control method based on 4D flight path operation of the system, the control terminal module is used for processing flight plan data and generating 4D flight paths through a hidden Markov model to analyze potential traffic conflicts of airspace traffic conditions, and a model prediction control theoretical method is adopted to provide the optimal resolution scheme. The method can effectively prevent flight conflicts and improve air traffic safety.
Owner:JIANGSU UNIV OF TECH
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