103 results about "Coverage control" patented technology

A method of forming a dielectric film having Si—C bonds and / or Si—N bonds on a semiconductor substrate by cyclic deposition, includes: (i) conducting one or more cycles of cyclic deposition in a reaction space wherein a semiconductor substrate is placed, using a Si-containing precursor and a reactant gas; and (ii) before or after step (i), applying a pulse of RF power to the reaction space while supplying a rare gas and a treatment gas without supplying a Si-containing precursor, whereby a dielectric film having Si—C bonds and / or Si—N bonds is formed on the semiconductor substrate.

A pistol-shaped powder delivery device consolidates propellant pulse creation, powder storage, powder aerosolization and aerolsolized powdered delivery in a single device while providing dose, pattern and coverage control of the output spray. The single-hand-held, single-hand-operated device includes a housing having a handle portion that is selectively collapsed to generate a propellant pulse that is conveyed into and through powder stored in a reservoir mounted at an upward angle to the horizontal in a receptacle provided in the housing. Powder in the reservoir is caused to be aerosolized by the propellant pulse whereupon aerosolized powder exits the reservoir through an open end of, and elongate slots provided in the sidewall of, an elongate hollow member extending from an outlet in the receptacle through the stored powdered material into a head space in the reservoir. The outlet is connected a barrel portion for output of the aerosolized powder spray.

An internally supported cable system control for a bicycle that does not interfere with the steering mechanism and does not require the structural integrity of the bicycle frame to be compromised. In the disclosed internal cable system, the control cables are routed through a passageway in the gooseneck and the bicycle frame to the mechanism or device that they are designed to control. The gooseneck design is unique in that it allows for an unobstructed passageway for the cables to travel into the steering tube and frame, while allowing for both sliding forward and rearward as well as raising and lowering, as desired by the bicycle rider. For aesthetic reasons, a casing may be added to cover the cabling between the control levers and the gooseneck.

An overlay control circuit and method. In a preferred embodiment of the invention, a graphics controller provides main image data and overlay image data to a display device and includes a memory for storing the main image data and the overlay image data and a logic circuit for producing a signal that, in an active state, indicates that a particular location in the display device is to be represented by the overlay image data. The overlay control circuit fetches the main image data from the memory and is further adapted to respond to a transition in the indicating signal to the active state by halting the fetching.

A system of controlling a cell coverage is provided. The system includes: a state information generation unit to generate state information by considering at least one of a cell coverage and a traffic load of a target cell; an adjacent state information identification unit to identify adjacent state information which is generated by considering at least one of a cell coverage and a traffic load of an adjacent node, from at least one adjacent node; and a cell coverage control unit to control the cell coverage of the target cell based on the state information and the adjacent state information.

A wireless parameter control device comprises: a serving cell prediction unit (11) which predicts a wireless cell which is a connection destination of a first wireless terminal within a first wireless cell upon assuming that an offset value which is added to the wireless quality which the first wireless terminal measures for each wireless cell is changed to a prescribed candidate value; a communication speed index prediction unit (12) which predicts a communication speed index of the first wireless terminal upon assuming that the offset value is changed to the prescribed candidate value and / or a communication speed index of a second wireless terminal within a second wireless cell which is present in the periphery of the first wireless cell; and a coverage control unit (13) which, on the basis of the result of the prediction of the communication speed index, controls the coverage of the first wireless cell and / or the coverage of the second wireless cell.

The present invention discloses a method for optimizing sensor network node location in a geological CO2 storage area. In the method, by analyzing data in a monitoring area, such as geological data, geographical data, and meteorological data, analyzing influence factors of a CO2 leakage event and determining a sensitivity partition, designing different coverage control schemes of monitoring sensor network nodes, or intensively or sparsely arranging sensor monitoring nodes, a coverage network is described and optimally expressed on the basis of Delaunay triangulation. In the method for optimizing sensor network node location in a geological carbon dioxide storage area, the arrangement density of wireless sensor network nodes can be dynamically adjusted according to geological and geographical features of a detection area, and the arrangement optimization of a dynamic monitoring sensor network for coal seam carbon dioxide injection area leakage can be realized. The method reduces node redundancy and communication overheads as much as possible, and has strong network coverage and network connectivity.

The invention relates to a novel underwater wireless sensor network point coverage control method. In the method, node depth adjustment is taken as a feasible mobile mode. The method comprises the following steps that: firstly, nodes determine depths of the nodes in reference to a distance between a Sink node and a water surface vertex and the depth of a monitoring water area; secondly, the nodes determine perception radiuses of the nodes according to a distance between the Sink node and a water bottom vertex in reference to a minimum perception radius and a maximum perception radius; thirdly, communication radiuses of the nodes are increased greatly till neighbor nodes with smaller depths are inquired, and a node with a smallest coverage target quantity is selected from a set of the nodes to take the selected node as a cluster head; and lastly, a cluster head node makes inner-cluster nodes hibernate and wake up. Compared with an existing relevant method, the method disclosed by the invention is more feasible. Moreover, indexes such as network coverage, a communication rate, energy consumption and balance, and a network life cycle can be optimized comprehensively.

The invention discloses a coverage control method of a wireless sensor network, relating to the technical field of wireless sensor networks. The coverage control method comprises the steps of: 101, determining a hot spot region set according to a historical movement track of a to-be-monitored target; 102, configuring a static node in the determined hot spot region set, and randomly configuring a movable node; 103, after the target to be monitored enters a to-be-monitored region, predicting a region of the to-be-monitored target, possibly occurring in future; 104, detecting whether the predicted region is covered, if the predicted region is covered, ending, and if not, continuously executing the step 105; and 105, completely covering the predicted region by mobilizing the movable node. According to the invention, through predicting and regulating positions of the nodes, when no target passes through, the to-be-monitored region is partially covered, and the predicted region is effectively covered after the target occurs, thus the coverage degree of the to-be-monitored target is greatly improved, a topological structure is flexible and variable, and the network survival time is effectively prolonged.

The invention discloses a method for covering three-dimensional wireless sensor networks based on probability. In the three-dimensional monitoring, the wireless sensor networks exist contradiction between the intrinsic uncertainty and the fact that system is expected to have relatively strong fault-tolerant capability and robustness, and most of the current coverage control methods are limited to two-dimensional plane, and only 1-coverage can be provided. The invention adopts grids to model three-dimensional areas to be monitored, and an iterative and greedy enlightenment method is used for confirming the position of nodes of the sensor in the grids; the placement of each node is completed in each iteration till the total number of the nodes reaches the preset upper bound or till each node reaches k-coverage by probability T. The method of the invention has relatively high reliability and robustness, and can be used for special environment with weak signal transmission capability such as the water environment for monitoring; meanwhile, the method of the invention is also suitable for situations in which local areas in the whole area to be monitored raise priority requirement for coverage (giving priority to coverage and monitoring accuracy).

The invention provides an energy saving coverage control method of a sensor network based on virtual force orientation. The method comprises following steps: step 1, initializing network parameters; step 2, calculating an initial network coverage rate; step 3, solving the resultant force (as shown in the specification) borne by each node in the network; step 4, updating the coordinates of the nodes according to the resultant force (as shown in the specification) borne by each node; step 5, judging whether any one of conditions is satisfied as follows that: the balance state of the network is realized or the number k of loop iterations reaches a preset value K; if any one of conditions is satisfied, outputting a result and finishing, or returning to the step 3. In application of the algorithm of the embodiment of the invention, performances better than those of a VFA (Vector Based Hole Recovery) algorithm in aspects such as the network coverage rate, the convergence rate of the algorithm, the network energy consumption and the energy consumption balance of the network, can be obtained.

The invention provides a WLAN coverage control method and a sending parameter optimization method, device and system in order to lower the probability that terminals outside the coverage area of network information receive the network information and enhance network security. The method comprises the steps of obtaining optimal sending parameters, and using the optimal sending parameters or sending diameters obtained by calculating according to a multi-antenna scheduling algorithm sending a current frame to be sent according to the type of the current frame to be sent, wherein the type of the current frame to be sent comprises a management frame and a data frame. According to the WLAN coverage control method, the quality of receiving signals of terminals in the coverage area is guaranteed, the fact that the network key information carried by the management frame only can be received in a specific area is guaranteed, the safety of networks is enhanced, meanwhile, sending of the data frame and sending of the management frame is distinguished to be treated, the compromise between coverage control and multi-antenna processing gain is achieved to a certain degree, and therefore enough flexibility of multi-antenna scheduling is obtained.

A multi-window vehicular monitoring system has a data collection assembly, a console unit and multiple video cameras. The data collection assembly uses RF signal transmission to send distance data, and the console unit is further connected to a monitor and several video cameras. The system employs an image overlay controller to correlate the distance data and images to produce single-channel or multiple-channel video signals. With a continuous display of video images from all angles and constantly updated distance data, the vehicle driver becomes more aware of conditions around the vehicle at any given time. Thus no blind spots exist for the driver around the vehicle. Using such a monitoring system, a driver's visibility and safety can be considerably enhanced under all driving conditions.

A method of controlling the application of laser peening overlays on the surface of a workpiece to reduce the variability of shock waves generated therein, comprises applying an energy-absorbing overlay to a portion of the surface of a workpiece, measuring the thickness of the energy-absorbing overlay in at least one location on the energy-absorbing overlay, applying a transparent overlay material over the energy-absorbing overlay, measuring the thickness of the transparent overlay in at least one location on the transparent overlay, determining if the measured values for each overlay is within a specified range, and directing a pulse of coherent energy to the workpiece to create a shock wave therein when the measured values are within the specified range.

A loudspeaker system consisting of a plurality of direct-radiating electro-acoustical drivers arrayed along a curved line. While in one embodiment the curved line array may be a spiral array, in another embodiment it may be any curved line array (such as an arcuate array). The acoustical drivers are directly coupled to an acoustical waveguide without use of adapters or a throat section. The waveguide and the acoustical drivers may thus be oriented along the curved line so as to produce controlled vertical and horizontal angular coverage with improved phase coherence and reduced distortion. A plurality of phase plugs may be interspersed between the plurality of acoustical drivers to assist in equalizing the sound path to achieve uniform phase at the mouth of the waveguide.

The invention discloses a method for solving an optimal coverage control set of a static node in a wireless sensor network. With the adoption of the method provided by the invention, on the premise of keeping a certain coverage rate, a part of nodes enter a sleep state, so that the quantity of working nodes is reduced, the network energy consumption is reduced, and the network survival time is prolonged. Furthermore, a node set which has fewer working nodes, suitable sensing radius combination and low energy consumption, and meets certain coverage requirements can be found out by not considering communication and calculation energy consumption among nodes, considering energy consumption of a node sensing module, and using a property that the nodes have adjustable sensing radii. Three sub-functions, namely, energy consumption of the network node sensing module, a network coverage rate and a network node sleep rate, can be established, and a fitness function of a genetic algorithm is commonly formed by the three sub-functions; and the model is solved by using the genetic algorithm. An optimal working node combination with a large coverage range, fewer working nodes and low energy consumption, and an optimal sensing radius combination of the working nodes can be obtained.

Identification, authentication and coverage control method, based on the Bluetooth® standard and implemented on a system comprising:a central entity;a network of beacons;a set of terminals, in which each terminal is adhered to, at least, one beacon;wherein in the method a profile is defined for each terminal [1] including an authentication service [5] and a coverage control service [6], with a service identifier which is exclusive and the same for all Bluetooth® devices [4]. Besides, when the Bluetooth® device [4] is detected by a beacon [2] of the network, it connects to the coverage service [6] of the device [4], wherein if the identification is positive:the device [4] is considered a terminal [1] of the system;it is authenticated that the terminal [1] belongs to the beacon [2] through the connection to said beacon [2] to the terminal [1] authentication service [5] exchanging, at least, four messages;after the authentication process, if it is positive, the terminal [1] adheres to the beacon [2]; if it is negative, the terminal [1] belongs to the system but is not adhered to said beacon [2].

System and method for automated semiconductor manufacturing is provided. In accordance with one aspect of the present invention, a system for automated semiconductor wafer manufacturing includes a smart overlay control (SOC) database having empirical alignment data related to overlay alignment, and a simulation module communicatively coupled to the SOC database, the simulation module determining a simulated overlay alignment of a wafer on the plurality of photolithography tools in a tool bank based on the empirical alignment data stored in the SOC database. The system also includes a dispatch module communicatively coupled to the SOC database and the simulation module, the dispatch module controlling the dispatch of a wafer to one of a plurality of photolithography tools in a tool bank based at least in part on the simulated overlay alignment.

A network management system includes: wireless link quality information collection means for collecting, from a mobile terminal that is connected to the mobile communication network, wireless link quality information that indicates wireless link quality measured by the mobile terminal, the wireless link quality information containing information about quality of wireless links between the mobile terminal and two or more wireless cells; coverage evaluation means for evaluating the wireless cell coverage on the basis of wireless link quality information calculated for each of the wireless cells using the wireless link quality information collected by the wireless link quality information collection means; and wireless parameter calculation means for calculating an amount of change in changing for a wireless parameter of a wireless base station on the basis of the result of the evaluation provided by the coverage evaluation means.

The invention discloses a covering and controlling method of the wireless sensor network which adopts the covering judgment of multiple intersection points. The method carries out the distributed type node dynamic sleep control on the wireless sensor network via a redundancy judgment rule of the covering degree of the multiple intersection points. At the initial period of the network operation, each node is at the working status and periodically broadcasts the working message to the neighboring node, simultaneously collects the working information of all neighboring nodes; when one node receives the information from the neighboring node, the node carries out the redundancy qualification judgment, and keeps or transforms the status according to the judgment result for realizing the distributed type node dynamic sleep control of the sensor network. The method judges the redundancy of the network node according to the necessary and sufficient condition for avoiding the occurrence of the blind spot of covering, simultaneously enables the number of the active nodes to decrease to the minimum, decreases the power consumption of the system, prolongs the service life of the network, and realizes the coverage-configurable network covering and controlling which has the advantages of completeness, reliability and high efficiency.

Provided are a mobile communication system, a base station and a cell coverage control method whereby the mobile communication system can be operated such that the cell coverage is set to approximately a target value in a timely manner without any human efforts. In this mobile communication system, a mobile station reports, to the base station, positional information of the mobile station and a reception power value of a reference signal received from the base station. Based on the positional information and reception power value from the mobile station, the base station acquires a measured cell coverage, which is a result of cell coverage measurement, and further controls at least one of a plurality of parameters, which include the power of transmission to the mobile station and the antenna tilt angle, such that the error between the measured cell coverage and a target cell coverage is reduced.

The occurrence of a splash at the time of performing a plating coverage control by using a gas wiping nozzle is suppressed to manufacture a molten-metal plated steel band of a high quality stably. The gas wiping nozzle used is provided with an auxiliary nozzle on the upper and / or lower sides of a main nozzle unit. The auxiliary nozzle unit has its gas injecting direction inclined with respect to the gas injecting direction of the main nozzle unit, and injects a gas jet at a lower speed than that of the gas jet injected from the main nozzle unit. The angle, which is made between the lower face of at least the leading end side portion of the gas wiping nozzle and the steel band is set to 60 degrees or more. Moreover, the gas injection port of the auxiliary nozzle unit is spaced by 5 mm or more in the anti-steel-band direction with respect to the gas injection port of the main nozzle unit, and the gas is so injected from the auxiliary nozzle unit that the auxiliary gas jet from the auxiliary nozzle unit may take a flow velocity at 10 m / s or more at a merging portion with the main gas jet from the main nozzle unit.

The invention discloses a wireless sensor network coverage maintaining method. The method is based on a probability calculation method to carry out a node redundancy judgment without node position information required, and the wireless sensor network coverage maintaining method carries out an energy balance through collaboration between neighboring nodes. After initialization of a wireless sensor network, operating time is divided into a number of rounds, each round in order carries out a coverage control phase and a state steady phase, and one round is followed by a next round when the one round ends. In the invention, the probability calculation method is used to calculate the node redundancy and coverage quality; the probability calculation method is simple; the node position information is not required; the node precise position information is not relied on; the cost of network hardware is significantly reduced; and the great application value is realized.

The invention relates to the technical field of communication, especially relates to a signal coverage control method and system of a WiFi access point. The method provided by the invention comprises following steps of receiving state signals transmitted by terminals; determining antenna sections in which the terminals are located according to the state signals; and controlling the access point so as to maximize the signal output powers with the radiation units corresponding to the antenna sections. Therefore, according to the method and the system, the antenna sections in which the terminals are located can be judged relatively accurately; the access point is relatively accurately controlled so as to adjust the signal output powers with the radiation units corresponding to the antenna sections in which the terminals are located; the terminals in the antenna sections are allocated and receive relatively rational network signal strengths; further the communication qualities of the terminals in the antenna sections are prevented from being influenced by the fact that the network signals in the corresponding antenna sections are relatively poor; the wastes of network signal resources and related resources can be reduced; and the use experience effects of the users are comprehensively increased.