3923results about How to "Reduce loss rate" patented technology

A node includes a receiver for receiving a first packet from a first node at a first time and a second packet from a second node at a second time, a processor for determining the first time and the second time and for comparing the first time with the second time to produce a ratio of workloads of the first node and the second node, and a transmitter for transmitting packets to the first and the second nodes based on the ratio.

The invention provides a method and system for fault-tolerant communication. It utilizes three wide area networks, including the cell phone network, the internet and the telephone network (PSTN). The method and system monitors the wide-area networks and sends warning messages if they cannot be accessed from a local site. Primary failure conditions relate to the access and use of the three wide-area networks. Secondary failure conditions include power outages. The possible fault conditions include: ‘telephone out’, ‘internet out’, ‘wireless radio out’, ‘power out’. If these failure conditions are detected, the method and system alerts the user and redirects voice, text message, and data traffic via a detour over a different wide-area network in order to avoid that failure.

A method and system has been disclosed that routs information over one of multiple networks in a fault-tolerant manner. In case of network failure, detour routers allow the start-detour routers to switch the information flow over another network to an end-detour router, where the information flow is switched back to the originally-intended network. Cell radios are utilized, as well as telephones and the internet to provide redundancy and fail-over under ‘telephone out’, ‘internet out’, ‘cell phone out’ conditions. The method has particular strengths in supporting communication even with dynamically assigned addresses, thus assuring that remote users receive monitoring and alarm information in a timely manner.

The invention discloses an intelligent inspection system and an inspection method for an electric transmission line by an unmanned aerial vehicle. The intelligent inspection system comprises an inspection mission planning system, a dispatching system, a monitoring system, an inspection result processing platform and mobile branch stations, wherein the inspection mission planning system communicates with the inspection result processing platform and the dispatching system respectively; the inspection result processing platform and the dispatching system communicates with the monitoring system respectively; the monitoring system is connected and communicate with the mobile branch stations. The inspection method has the benefits that factors of the inspection unmanned aerial vehicle, inspection equipment, an inspector, and the like accessing the dispatching platform through a dispatching terminal can be dispatched effectively to realize equipped configuration of unmanned aerial vehicle inspection resource; the usage rates of personnel and equipment can be improved; the no-load rate and vacancy rate of the inspection equipment are reduced; through centralized monitoring of condition information inspected by the unmanned aerial vehicle, unmanned aerial vehicle inspection dispatching personnel can master unmanned aerial vehicle inspection in the large effectively; the service life of the unmanned aerial vehicle is prolonged.

The invention relates to a real-time dynamic 3D water balance monitoring system of a power plant and a working method of the system. The system is characterized by comprising a data collection module, a data transmission module, a data storage module, a monitoring center and a data analysis and application module, wherein the data collection module collects flow data, and the data transmission module returns data collected by the data collection module in real time. Water volume data of different collection points is collected by the data collection module, transmitted to the data storage module by the data transmission module, and further transmitted to the data analysis and application module by the data storage module. The system and method have the advantages that the relation between water volume change and generating load is found via data analysis, the imbalance rate is calculated, and thus, scientific basis is provided for planning water-saving measures of the power plant.

The invention relates to a comprehensive recovery process for lithium-containing polymetallic ores with associated fine-grained niobium-tantalum. The process comprises the steps of raw ore crude grinding, settlement for desliming, flotation, agglomeration and magnetic separation, gravity separation and the like. The process provided by the invention is particularly applicable to the comprehensive recovery of lithium-containing polymetallic ores which contain a great amount of slime, are located in mining areas at low temperature all through the year, are low in grade of associated niobium-tantalum minerals and are fine in disseminated grain size, the process is advanced, reliable, simple, reasonable and highly targeted, the requirement on raw ore grinding fineness is not high, the regrinding amount is small, the operation cost is low, the comprehensive recovery rate is higher and the industrialization prospect is good.

The invention discloses an unmanned aerial vehicle electric power circuit polling scheduling platform based on a GIS (geographic information system), which comprises a scheduling server, a human-computer interaction module, an RFID (radio frequency identification device) reader-writer, an identity card reader and a short message receiving-sending module; as an unmanned aerial vehicle electric power circuit polling scheduling method based on the GIS is matched for use, polling equipment, personnel, time and circuits are scheduled through a scheduling terminal in consideration of elements such as polling field state information, equipment information and personal information a plurality of polling tasks are finished as far as possible under a limited resource condition, the polling efficiency of the unmanned aerial vehicle is improved, the reliability and the security of the unmanned aerial vehicle polling are improved, and the unmanned aerial vehicle polling cost is lowered.

The invention discloses a mechanical continuous mining method for a gently inclined thin ore body. Based on the principle of lengthening the slope distance to reduce the angle, ore blocks are arranged in an inclined way, so that an angle smaller than the original inclination angle can be formed between a working plane and the horizontal plane, thus creating an operating space for a drill jumbo and a scraper; a return air shaft is arranged at the corner of one ore room so as to be communicated with an upper horizontal return airway; each ore room is provided with an orepass used for the transmission of ores in the ore room; and a tunnel is respectively excavated along the strike direction above and below each ore room, the upper tunnel is used for ventilation connection, and the lower tunnel is used for ore removal connection. The invention is especially applicable to the mining of the gently inclined thin ore body of an underground mine, mining preparation has no requirements for undercutting projects, and the drill jumbos and scrapers are used for the operation, thereby achieving the characteristics of high degree of mechanization, high production efficiency, full-thickness continuous mining and low ore loss rate.

The invention discloses a system and a method for centralized dispatching of electric line patrol by an unmanned aerial vehicle based on GIS. The system comprises a dispatching platform, a dispatching terminal, a ground monitoring station and an unmanned aerial vehicle, and according to the method for centralized dispatching of electric line patrol of an unmanned aerial vehicle, equipment, workers, time and line for patrol are dispatched through the dispatching terminal by considering the factors such as patrol field state information, equipment information and worker information to finish patrol tasks as many as possible under limited source conditions. Based on the system and the method, the patrol efficiency of the unmanned aerial vehicle is improved, the patrol reliability and safety of the unmanned aerial vehicle are improved, and the patrol cost of the unmanned aerial vehicle is reduced.

The invention discloses a beneficiation method for separating fluorite, white tungsten (black tungsten) and gangue minerals in complex polymetallic ore through flotation. Non-magnetic products of tailings subjected to sulphide ore flotation or tailings subjected to sulphide ore flotation and then subjected to strong magnetic separation for recycling black tungsten serve as two kinds of samples. The pH value is controlled by adding regulators, white tungsten, black tungsten, other gangue combined inhibitors and collectors are added, fluorite is subjected to differential flotation, then, tungsten minerals are subjected to flotation, and therefore fluorite and tungsten can be efficiently recycled. Loss of fluorite in tungsten flotation concentrate is avoided when tungsten minerals are subjected to differential flotation, and the defect that when tungsten flotation is performed, fluorite is difficult to recycle through flotation because the inhibitors have strong inhibition on fluorite, and beneficiation efficiency is low is avoided. Compared with a current beneficiation situation, the fluorite recycling rates of tests on the two different samples are increased by 39% to 48 % and 9% respectively, and the tungsten recycling efficiency is improved by 3%.

The present invention is a shared buffer architecture that dynamically allocates buffer size to each of multiple sources depending on buffer pool utilization, estimated per-connection offered load, and the total number of connection established within a given class of service. When the buffer pool is almost empty, each source is allocated a large buffer space, proportional to its estimated offered load. When the buffer pool is more full each source is allocated a reduced buffer space, while maintaining the proportional weighting relationship. The invention keeps track of the amount of input per source and dynamically allocates a proportionate amount of buffer space in the buffer memory for that source. The dynamic allocation is made as a function of the fullness of the memory allocation for all sources. Additionally, thresholds are modulated dynamically as the number of established connections within a given class modulates, providing a predictive aspect to the system, with respect to congestion control. The main objective is to fairly allocate buffer space depending on the amount of traffic and the amount of buffer space taken up by each source. In operation, the memory allocation is readjusted depending on the total number of cells in the buffer memory, the estimated offered load, and the total number of connection established within each class of service, providing a highly dimensional solution to the multi-dimensional problem of congestion management in communication network nodes.

The invention relates to a two-die three-punch upsetter. A third punch die is a trimming die or a forging and pressing die and is arranged on a large slide block, and a first punch die and a second punch die are arranged on a lifting plate; a first concave die corresponds to the first punch die and the second punch die, and a second concave die corresponds to the third punch die; and axis of the second concave die and the third punch die are oppositely kept on the same straight line all the time. A working method comprises the following steps of: forming a workpiece by rotating a crank shaft twice; when the large slide block is upset for the first time, upsetting a blank into a primary upsetting semi-finished workpiece by the first punch die and preserving the semi-finished workpiece in the first concave die; upsetting a secondary upsetting semi-finished workpiece into a finished workpiece by the third die and ejecting the finished workpiece out; when the large slide block upsets for the second time, upsetting the primary upsetting semi-finished workpiece into the secondary upsetting semi-finished workpiece by the second punch die and ejecting the secondary upsetting semi-finished workpiece out; and air beating by the third punch die. The invention can achieve the functions of various upsetters, such as a one-die two-punch upsetter, an outer hexangular trimming machine, a three-die three-punch upsetter, and the like.

This invention relates to plasma processing apparatus and in particular, but not exclusively, to inductively coupled plasma helicon or electron cyclotron resonance apparatus. A plasma generation chamber is sat above a process chamber, in which is located a workpiece support. A plasma generation or source region exists and coils are provided to create magnetic mirrors above and below the plasma generation zone, whereby electrons will be reflected back towards the plasma zone and there is no electrical conductive path extending around or through at least the upper mirror.

The invention is an ECN-based forecasting and verifying congestion control method, firstly using the difference between two adjacent packets to calculate forecast parameters of a current packet, by this recurring to the corresponding forecast queue length of, and able to refer to the congestion conditions of nodes to correct the forecast length as a common forecast threshold value for all the packets; taking 2 x the first packet delay as signal transmitting time and all the packets as forecast packets in order to find a forecast value of average queue length of all the packets, a receiving end compares the difference between the forecast value and the forecast threshold value with predicted floating value of the forecast value, so as to be able to send a confirm packet increasing, decreasing or keeping the length of congestion window to the source end, convenient for the source end to regulate the packet transmitting speed. This receiving end driving method has the advantage of reducing loss rate and average packet delay at the same time, has stale and higher network utilization ratio and can also forecast the network's congestion conditions.

Embodiments of the present invention include a method for performing joint time synchronization and carrier frequency offset estimation in a wireless communication system, comprising steps of: on a transmitter: performing frequency domain spreading and interleaving on input data by using a predetermined spreading factor (SF) to generate a frequency domain training symbol; performing Inverse Discrete Fourier Transformation (IDFT) on the generated frequency domain training symbol to generate a first time domain training symbol; reversely copying the generated first time domain training symbol to a second time domain training symbol such that a complete training sequence is formed; and on a receiver: detecting an average power of received signals to judge the coming of a training sequence, and performing coarse frame synchronization; performing joint fine frame synchronization and carrier frequency offset estimation based on a received training sequence; and compensating for the carrier frequency offset based on the carrier frequency offset estimation result so as to eliminate the carrier frequency offset. In addition, embodiments of the present invention also include an apparatus for performing joint time synchronization and carrier frequency offset estimation and a method for generating a training sequence.

The invention provides a method for preparing an electrostatically self-assembled drug carried layer. The method includes (1) performing surface modification pretreatment on a medical apparatus; (2) performing charge load surface pretreatment on the medical apparatus to form charge, which is the same to the charge carried by a first weak polyelectrolyte, on the surface of the medical apparatus; (3) preparing solution of a second weak polyelectrolyte and solution of a third weak polyelectrolyte, dissolving a drug in the second weak polyelectrolyte solution or the third weak polyelectrolyte solution; (4) soaking the medical apparatus with charge carried surface in the second weak polyelectrolyte solution, taking out, washing; (5) soaking the medical apparatus in the third weak polyelectrolyte solution, taking out, washing; and (6) repeating the step (4) and the step (5) alternately to form alternate electrostatically self-assembled drug carried layer with a desired drug density on the surface of the medical apparatus. The drug is included in the weak polyelectrolyte molecule layer.

The invention discloses a wireless sensor network multiple target real-time tracking system based on event drive. The system is designed by using a hierarchy logical structure, wherein a perception layer, a network communication layer and an application layer are respectively comprised. In order to avoid network conflict in a multiple target tracking process, a self-adaption clustering node scheduling strategy based on a task is used. A Calman filter positioning tracking algorithm based on event drive is disclosed. A least square method with fast convergence speed is used to modify a current Calman filter state value, and positioning tracking is carried out on a number of mobile robots in a sensor network. The system uses a double token working mode and is combined with a dynamic time slot allocation method based on a task to effectively complete a network task in real time. The system uses the self-adaption clustering node scheduling method, can automatically carry out clustering on measurement data according to a moving target, breaks a previous working mode which is limited by single target tracking, and realizes a real-time multiple target tracking function and remote feedback control based on a wireless network.

The invention discloses a bus bar. The bus bar includes an insulator and a plurality of terminals inserted into the insulator and connected to the coil of a stator. The central axes of virtual circles extended from the inner circumferential surfaces of the plurality of terminals are differently disposed. The insulator may have a simple structure because the terminals having the same shape are assembled. Besides, whether each terminal is assembled with the insulator in an appropriate manner is not needed to be detected so that the productivity of an assembly process can be improved.