262results about How to "Improve congestion" patented technology

A system for detecting, monitoring, reporting, and managing congestion in a fabric at the port and fabric levels. The system includes multi-port switches in the fabric with port controllers that collect port traffic statistics. A congestion analysis module in the switch periodically gathers port statistics and processes the statistics to identify backpressure congestion, resource limited congestion, and over-subscription congestion at the ports. A port activity database is maintained at the switch with an entry for each port and contains counters for the types of congestion. The counters for ports that are identified as congested are incremented to reflect the detected congestion. The system includes a management platform that periodically requests copies of the port congestion data from the switches in the fabric. The switch data is aggregated to determine fabric congestion including the congestion level and type for each port and congestion sources.

A method, program, system and apparatus perform dynamic load balancing of coverage areas in a wireless communication network. The dynamic load balancing is performed by evaluating cell congestion based on location information of subscribers in the wireless communication network, collecting network parameters related to the wireless communication network and altering network parameters based on the evaluated cell congestion. After the network parameter is altered, the coverage areas are narrowed. Improvements in cell congestion and quality of server are then determined based on the narrowing of the coverage areas. Altering of the plurality of network parameters and evaluating of the cell congestion are performed continuously until a target quality of service is achieved.

A data flow control method and system within a data switch. The data switch includes a plurality of input sections each having an associated input buffer and each transmitting data to an output section. In response to a detection of congestion within the output section, data transmissions from the plurality of input sections to the output section are paused. Input buffer occupancies of each of the input sections are then determined. Thereafter, and in response to a backpressure relief signal, the restart of said data transmission from each of the input sections to the output section is delayed in inverse proportion to each of the determined input buffer occupancies.

A protocol for differentiating congestion-related packet loss versus random packet loss in a wireless data connection. The protocol monitors changes in the length of a transmission queue in a wireless data connection over an interval substantially equal to the amount of time it takes to transmit a window of data packets and receive acknowledgements corresponding to all data packets transmitted in the window. If packet loss is preceded by an increase in the queue length over two consecutive intervals, the packet loss is designated as being due to congestion and a congestion avoidance algorithm is initiated. Otherwise, the packet loss is designated as random loss and the transmission window is maintained at its current size. The protocol reduces the transmission rate only when congestion is identified as the cause of lost packets; otherwise wireless losses can simply be quickly retransmitted without a reduction in the data transmission rate.

An intelligent logistics platform system comprises a city-wide distribution basic function module, a city-wide logistics distribution supporting service module and a transaction value-added service module. According to the platform, with high-tech intelligence as the support, the role of information technology in logistics distribution is enhanced, and a new logistics distribution service system for realizing the most effective resource allocation between city logistics vehicles and goods is achieved. Through integrating related information of logistics upstream and downstream enterprises, a comprehensive supply chain solution is provided, diverse and complex needs of a demand side can be met effectively, logistics market informatization is promoted, and while the economic development of the region is promoted, the Internet of things research and development field is expanded.

The invention discloses an establishing method and a working method for a traffic overflowing coordinate control optimization model. The establishing method includes the following steps that a queuing length limiting condition model is established to obtain a phase different range which can prevent traffic overflowing from occurring; a phase different optimizing method is established based on the minimum delay to obtain a function relation between phase difference and delay time; according to different restraints, on the phase difference, of the queuing length limiting condition model and the minimum delay phase difference optimization method, the two restraints are combined to take the minimum value in an intersection, so that the traffic overflowing coordinate control optimization model which not only can prevent overflowing from occurring, but also can minimize vehicle delay time is obtained. The establishing method and working method have the advantage that the traffic overflowing phenomenon is effectively prevented from occurring at the morning and evening peak periods of city primary roads.

A protocol for differentiating congestion-related packet loss versus random packet loss in a wireless data connection. The protocol monitors changes in the length of a transmission queue in a wireless data connection over an interval substantially equal to the amount of time it takes to transmit a window of data packets and receive acknowledgements corresponding to all data packets transmitted in the window. If packet loss is preceded by an increase in the queue length over two consecutive intervals, the packet loss is designated as being due to congestion and a congestion avoidance algorithm is initiated. Otherwise, the packet loss is designated as random loss and the transmission window is maintained at its current size. The protocol reduces the transmission rate only when congestion is identified as the cause of lost packets; otherwise wireless losses can simply be quickly retransmitted without a reduction in the data transmission rate.

The invention discloses an urban express delivering method based on a vehicle self-organized network. The method comprises: clustering delivery areas into k blocks by utilizing urban roads and transportation data; calculating link information among blocks by utilizing a historical vehicle track; performing topology modeling according to the blocks and the link information, and establishing a weighted directed graph to draw an urban in-vehicle network; searching the weighted directed graph to obtain a sub-graph of a starting point and an end point of an express piece; obtaining an express delivering path p with minimum weight in the sub-graph by utilizing a Dijkstra shortest path algorithm, wherein the path is an optimum express delivering path; and finally, delivering the express piece according to the path p. According to the delivering mode, the cost of express delivery is greatly reduced; and urban public transport vehicles instead of express transport vehicles are utilized, so that the situation of urban traffic congestion is improved.

The invention provides an intelligent management system for roadside parking, comprising a control platform of an urban traffic management center, a parking company management center, a parking management PDA (personal digital assistant), a space-entering parking monitoring PDA and an illegal parking mentoring PDA. An integrated management approach comprises a parking charge management process, a parking monitoring process and an illegal parking monitoring process. According to the invention, the intelligent integrated management and charge for roadside parks can be realized, the operation holes can be decreased, the management efficiency is improved, and the urban congestion can be improved.

A method of sustaining live interactive streaming of multimedia content from a transmitter to a receiver through a communication network exhibiting channel congestion. The method comprises: transmitting the multimedia content encoded in a first encoding scheme characterized by a high bit rate; receiving and reconstructing the transmitted multimedia content through a dynamic switch lag buffer; measuring, recording and analyzing an incoming packet delay at the receiver; predicting a packet delay based on the analyzed incoming packet delay; predicting an increase in channel congestion by detecting an increase in the predicted packet delay, and notifying the transmitter thereof, and transmitting thereupon the multimedia content using a second encoding scheme characterized by a low bit rate. Continuous live interactive streaming of the multimedia content is sustained despite the increase in channel congestion by a fast and visually seamless switching between the encoding schemes, the timely prediction and the switch lag buffer.

An on-board call access control method is characterized in that for access request, firstly judge the type of call: if a switching call, determine the switching call service is low-priority or high-priority, and implement the switching call request access process on the low-priority or the high-priority call service; if a new call, determine the new call service is low-priority or high-priority, and implement the new call request access process on the low-priority or the high-priority call service. Under the circumstances of ensuring the indexes of handoff failure probability of satellite systems, the new call-blocking probability, the link bandwidth utilization and so on, the invention fully considers the satisfaction of users and the influence of network-load changes on the system performances, effectively ensures the QOS requirement of mobile satellites, and improves comprehensive properties and robustness of satellite systems.

Methods and apparatuses are disclosed for generating a placed, routed, and optimized circuit design. Other embodiments are a circuit design and circuit created with the technology. The placed, routed, and optimized circuits design obeys relative positioning rules of a set of the circuit elements. Such relative positioning rules were created specifically for these circuit elements.

The invention provides a single-point intersection signal timing parameter optimization method based on bayonet data. Existing urban intersection signal control is mostly based on profile data of an annular coil detector arranged behind a parking line, and if the detector is badly damaged, travel time, delay and other traffic flow evaluation parameters used for traffic control can not be obtained. According to the basic idea of the method, a bayonet electronic police system is used for obtaining vehicle license plate recognition data, travel time and delay of all phase traffic flow from an upstream intersection to a current intersection are obtained by matching upstream vehicle license plates and downstream vehicle license plates, a signal cycle is obtained through phase saturation degree optimization, and effective green light time of each phase is obtained through optimization according to delay change conditions of different phases. The method for intersection signal timing by means of existing electronic police data is provided, and accordingly investment for arranging intersection detectors can be reduced, and intersection traffic control efficiency is effectively improved.

Methods and apparatuses are disclosed for automatic orientation optimization in the course of generating a placed, routed, and optimized circuit design. Also disclosed are a circuit design and circuit created with the technology. Also disclosed are a circuit design and circuit created with the technology.

A method of controlling a data unit sender is described. A flow control procedure for controlling the flow of data units sent by said data unit sender is conducted in dependence on acknowledgement messages from the receiver The flow control procedure utilizes (S103) at least one output limiting parameter (olp; cwnd) for placing a limit on the data units sender's current data send rate. A procedure is provided for detecting (S110) a data unit loss indication, in response to the detection of a data unit loss indication, performing (S311) a retransmission, subsequent to said retransmission (S311) waiting (S312) for an acceptable acknowledgment message carrying the sequence position identifier indicative of said data unit indicated as potentially having been lost, and distinguishing (S317) whether said acceptable acknowledgment message relates to an original transmission, and in response to distinguishing that said acceptable acknowledgment message does not relate to said original transmission, performing (S318) a congestion response step, while in response to distinguishing that said acceptable acknowledgment message relates to said original transmission, said output limiting parameter is adapted (S319) based on one or more duplicate acknowledgment messages received since receiving the last acceptable acknowledgment message that precedes the acceptable acknowledgment message carrying the sequence position identifier indicative of said data unit indicated as potentially having been lost.

The invention discloses a method and a system for realizing downlink Qos (Quality of Service) of family gateway, which provides a plurality of downlink Qos configuration strategy and configuration interface of managing media for network management, therefore the network management can adjust the current downlink Qos configuration strategy through the configuration strategy of managing media according to networking condition of current network, and enables the post-adjustment downlink Qos configuration strategy through a Qos configuration management module. When the data flow overloads or network congestion occurs, according to the technical scheme of the invention, the downlink Qos configuration strategy is executed, which can guarantee quality of critical service effectively, improve use experience of users, and simultaneously improve state of network congestion.

The invention discloses an intelligent payment method for gas stations, which includes the following steps: a user edits a refueling order through a WeChat client, and pushes the refueling order to arefueling payment platform; after the vehicle of the user enters a gas station, a vehicle identification system identifies the license plate of the user, and the refueling order edited by the user ispushed to a refueling machine; after the vehicle reaches the refueling machine, a refueling operator checks and verifies the refueling order on the refueling machine, and carries out refueling after the refueling order passes verification; and after refueling is finished, the WeChat client of the user automatically generates a refueling payment order, and the user makes payment through a third-party payment system associated with the WeChat client. Remote order placing is realized. Users can make payment easily through a mobile terminal after order placing and refueling. The traditional way ofperson-to-person cash transaction is avoided. Time and vigor are saved for users. The phenomenon that a gas station is in a jam during rush hours is greatly alleviated. The service level of gas stations is improved. The working efficiency of gas stations is improved.

The invention relates to a magnetic auxiliary tensioning device for a single-pore laparoscope. The magnetic auxiliary tensioning device for the single-pore laparoscope comprises an abdominal wall outer electromagnet capable of adjusting a magnetic force and an abdominal wall inner electromagnet matched with the abdominal wall outer electromagnet, a semicircular ring is connected to the bottom of the abdominal wall inner electromagnet; a pull wire passes through the semicircular ring; and one end of the pull wire is connected with a nonmagnetic titanium alloy forceps clip. When a single-pore laparoscopic surgery is performed, the pull wire can pass through the semicircular ring and an abdominal cavity notch to be controlled in vitro, and a performer indirectly controls and pulls the gall bladder through the pull wire, so by the method, the crowded state of single-pore instruments is improved by using the pull wire; and the pull power is controlled by the performer, so flexibility of the surgery is improved; and the pull direction is adjusted by moving the abdominal wall outer electromagnet to change the position of the abdominal wall inner electromagnet and the pull wire can be pulled to any directions in the range of 360 degrees, so the magnetic auxiliary tensioning device is flexible to use, without adding additional wounds.

The invention discloses an intelligent parking space timing service system and a control method thereof. The intelligent parking space timing service system is characterized by comprising an urban comprehensive parking space information server and a plurality of parking space timer systems which are in communication connection with the urban comprehensive parking space information server; each parking space timer system comprises a parking space timer body which comprises a central processing unit, a sensor unit, a communication unit, a paying unit, a power source unit and the like; the urban comprehensive parking space information server is in communication connection with a mobile terminal carried by a user through a network. When the intelligent parking space timing service system is in use, the urban comprehensive parking space information server is responsible for statistics and release of urban parking space information, and updates the urban parking space information in real time according to information sent by the parking space timer systems, information search, parking space appointment and other services are provided for the user more conveniently and rapidly, the user can conveniently go out, and meanwhile the road congestion phenomenon caused by temporary parking difficulty in a vehicle concentration area can be effectively changed.

An underpass under an intersection has a first underground level for pedestrians, accessible by one or more pedestrian accesses from the street level, a second underground level for vehicles, accessible by one or more vehicle accesses from the street level, wherein the first underground level enables pedestrians to safely cross a street underneath the intersection, and contains establishments for the pedestrians, and the second underground level provides vehicle parking. In an embodiment, tunnels connect the levels under adjacent intersections. An improved method has the steps of installing one or more pedestrian levels below ground having pedestrian accesses at selected street corners on the street above, installing establishments in the one or more pedestrian levels, and installing one or more vehicle levels below the pedestrian levels having one or more vehicle accesses at the side of streets above, wherein vehicle levels provide vehicle parking.

The invention relates to a high-power hydraulic drive fracturing pump system which can meet the requirement of high flow and high pressure of a large fracturing pump and can simultaneously solve the problem that a fracturing truck set is difficult to arrange in a well site due to too many vehicles. The technical scheme of the high-power hydraulic drive fracturing pump system is as follows: fracturing pump cylinders and power cylinders are connected in series through bolts; plungers are mounted into the fracturing pump cylinders and the power cylinders; the fracturing pump cylinders are connected with a fracturing fluid inlet manifold and a fracturing fluid outlet manifold; liquid inlet and outlet ports of the power cylinders are connected with a reversing assembly, and the reversing assembly is connected with an oil inlet pipe and an oil return pipe; the oil inlet pipe is connected with hydraulic oil pumps, the oil return pipe is connected with a cooler inlet, and a cooler outlet is connected with a hydraulic line for an oil tank; the oil tank is connected with the hydraulic line for the oil tank; and the hydraulic oil pumps are connected with engines through transmission cases. According to the high-power hydraulic drive fracturing pump system, the power and the discharge capacity of a single fracturing pump truck can be improved by 4-7 times, and accordingly, the number of the fracturing pump trucks is reduced; and a cooler, the oil tank and the hydraulic oil pumps can be arranged outside a well, thereby facilitating the arrangement of the fracturing truck set in the well site.

The invention relates to a method for preparing high-purity biodiesel with crude oil. The method comprises: pretreating the raw material of crude oil to remove impurities; subjecting the pretreated crude oil raw material to pre-esterification with concentrated sulfuric acid as a catalyst; then conducting transesterification with the presence of a base catalyst; recovering methanol and separating glycerin, thus obtaining coarse fatty acid methyl ester; subjecting the obtained coarse fatty acid methyl ester to purification, distillation, and segmentation so as to obtain high-purity fatty acid methyl ester.

The invention provides an intelligent gate system and a control method, which are used for toll collection systems in highways, subways, and other similar scenes. Entrance gates and Exit gates are used to acquire passing stations of users, and toll collection is carried out according to the passing stations, and then by adopting an automatic charging mode, automatic fee paying is realized. The queuing and fee-paying time of the users is greatly saved, and the time costs of the users are reduced, and in addition, a lot of manpower costs are saved for related departments, and costs of ticket vending machines, magnetic cards, and electronic labels are saved, and therefore by popularizing the intelligent gate system and the control method, the congestion conditions of the highways and the subways are obviously improved.

The invention relates to the water treatment field, and concretely relates to a multi-medium constructed wetland water treatment system and a treatment method thereof. The method comprises the following steps: adding sewage for treatment to enter an inlet water tank, and removing large floating materials and foreign materials in the sewage through a netted grating; allowing the obtained sewage to flow to shunting pipelines, controlling the sewage flow through a flow meter, and carrying out combination treatment by allowing the sewage to flow into a horizontal undercurrent wetland apparatus and / or a surface current wetland apparatus through the controlled closing of valves on the shunting pipelines according to the sewage concentration. The quality of water obtained after the treatment is good, the wetland purifying efficiency is increased, and the wetland obstruction is improved through the switching of the above wetland apparatuses by utilizing a combination treatment mode until the sewage for treatment is purified. The rapid switching of a single-stage wetland and a multistage wetland is realized through an ingenious valve design, so the pollutant concentration fluctuation problem of the sewage is effectively solved, and the adaptability and the application range of the wetland are improved; the running in a wetland unit switching mode is in favor of the wetland maintenance, prolongs the wetland life and effectively reduces the wetland obstruction phenomenon; and he system has a good removal effect on COD, ammonia nitrogen, nitrate nitrogen and total phosphorus in the sewage.

The invention discloses a high efficiency storing method for the coding digit of an LDPC coder based on an FPGA. In the method, the coding digit and external information (or channel information) share one storage block, thereby effectively reducing the requirement of the coder to the quantity of the storage resources; and the coding digit and the external information can be withdrawn when reading the storage block. Therefore, a check equation computational unit PCU and a check node update unit CNU can share one group of address information, and the PCU does not need additional address generation units; and finally, the design method of a step thinning production line is adopted to realize process units VNU, CNU and PCU, thereby effectively reducing the key path delay of the coder and providing a necessary safeguard to improve the throughput of the LDPC coder. When realizing the method with the FPGA, the invention not only can save a large number of the resources for respectively storing the digit and the logic resources for generating addresses which are needed by the PCU, but also can improve the throughput of the coders.

The invention relates to a road network running condition analysis system based on fuel consumption acquisition. The road network running condition analysis system comprises a fuel consumption acquisition module arranged on a vehicle, and a driving behavior analysis module, a fuel consumption obtaining module and a congestion state obtaining module which are arranged at a data processing center, wherein the fuel consumption acquisition module is used for acquiring fuel consumption data of the vehicle; the driving behavior analysis module is used for obtaining behavior types of a driver according to the acquired fuel consumption data, and the behavior types of the driver can be classified into vehicle starting and stopping, overtaking and idling; the fuel consumption obtaining module is used for obtaining the total fuel consumption on a section of the road according to an instantaneous fuel consumption value; and the congestion state obtaining module is used for judging whether a road where the vehicle is positioned is in a congestion state according to whether a congestion prejudging state occurs and the times of the congestion prejudging state behavior that occurs in a set time section T, that is, the road is defined to be in a congestion state when the frequency of the congestion prejudging state behavior that occurs is higher than 3 times. The congestion prejudging state is defined to be a state that the starting and stopping state of a vehicle is between twice idling of the vehicle. The system further comprises a congestion grading module.

The invention discloses a statistical method for the traffic flow based on moving vehicle detection, and relates to the field of computer vision. The statistical method comprises the steps of firstly performing image preprocessing by using a multi-scale morphological operator, then detecting a vehicle target by combining background real-time update, background difference and the edge gradient difference, and thus acquiring a binary image of the vehicle target; and finally performing single-lane or multi-lane traffic flow statistics through dual thresholds and state transition of a lane detection coil according the binary image. According to the method, the traffic flow of a single lane or multiple lanes can be worked out effectively and quickly, traffic lights can be enabled to change the time of red and green lights according to the current traffic flow, the utilization rate of urban transportation is improved, and a problem of urban vehicle congestion is improved.

The invention discloses a method of preparing ultrafine silica from chlorosilane residual liquid, and belongs to the technical field of treatment and recovery of chlorosilane residual liquid. The preparation method comprises the following steps: buffering chlorosilane residual liquid in a residual liquid storage tank, settling impurities in the tank, introducing the processed chlorosilane residual liquid to a hydrolysis tower, carrying out atomization by taking the nitrogen gas as the atomization gas source, contacting a prepared acidic absorber with the atomized chlorosilane residual liquid to carry out reactions, introducing the obtained mixed solution absorbed by hydrolysis reactions into a sealed intermediate collecting groove; subjecting the absorbed mixed solution to solid-liquid separation, delivering the separated hydrochloric acid, which can be used to prepare the absorber, to a hydrochloric acid storage tank; washing the separated silica to remove the hydrochloric acid and part of metal impurities, wherein the acid-containing water generated during the washing process can be used to prepare the absorber; and finally drying the washed silica so as to obtain the finished product of ultrafine silica. The nitrogen gas atomization is carried out under a sealed condition, and the provide method has the advantages of safety, reliability, low energy consumption, and no pollution, and converts the chlorosilane residual liquid into valuable resource.

A bank card binding-based quick refueling payment method disclosed by the present invention comprises the steps that: a user enables a WeChat client to be correlated with a bank card management system, and the correlated bank card management system supports the automatic fee deduction businesses within the set amount of money; the user edits a refueling order via the WeChat client, and pushes to a refueling payment platform; a vehicle identification system identifies the licence plate of the user, and pushes the refueling order edited by the user to a refueling machine; a refueling worker checks and verifies the refueling order on the refueling machine, and refuels once verifying successfully; after the refueling is finished, the WeChat client of the user automatically generates a refueling payment order, and the user pays automatically via the bank card management system correlated with the WeChat client. According to the present invention, by binding a bank card and the WeChat client, a quick refueling payment function is provided, the automatic payment and fee deduction can be realized, and a conventional multiple verification mode is avoided, the payment rate is increased, a peak congestion phenomenon of a gasoline station is improved greatly, and the service level of the gasoline station is improved.