206 results about "Definite time" patented technology

An aerial vehicle finite-time adaptive attitude control method based on an improved power reaching law aims at a problem of aerial vehicle attitude stabilization with concentrated uncertainty. A sliding mode control method based on the improved power reaching law is utilized, and furthermore through adaptive controlling, the aerial vehicle finite-time adaptive attitude control method based on the improved power reaching law is designed. A terminal sliding mode surface is designed for ensuring definite-time convergence of a system. Furthermore through the improved power reaching law, a buffeting problem is reduced in an actual control system. Furthermore the adaptive controlling is used for a feedback control system which intelligently adjusts a self characteristic according to the environment change so that the system can operate in an optimal state according to some preset standards. The invention provides the control method which can reduce the buffeting problem of the sliding mode surface and a control torque and furthermore realizes uniform ultimate boundedness of finite time of the system on the condition that uncertainty and interference exist in the system.

A liquid crystal display device comprising a including signal correcting means correction for correcting a level of an original image signal to a level with which transmittance in a steady state of the pixel with the original image signal is attained within one frame period, a horizontal driving means for driver applying a voltage in correspondence with the corrected image signal to a liquid crystal material, and an illumination device for illuminating the display panel with a plurality of light emitting regions thereof, said the light emitting regions sequentially turns turning on and off in synchronization with the application of the corrected image signal, while holding a definite time delay thereto.

This invention provides a handheld anti-stolen device including: fetch module, comparison module, cipher and inform modules. This invention also provides a handheld anti-stolen method firstly, to fetch the identification code of SIm and a predesigned correct anti-stolen cipher and fetch the identification code stored in a handheld last time, then to compare the two codes, if they are different, then to ask for inputting the predesigned correct anti-stolen code and examine if the cipher has been input in a definite time or correct then to start an anti-stolen program, if it's wrong or input not in definite time.

The invention provides a self-loop detection method and a self-loop detection device which are used for an access network. The method comprises the following steps: a self-loop detection message provided with authentication domain fields is transmitted in definite time; judgment is made whether a received message is a self-loop detection message; an authentication domain field carried by the message and an MAC address of the message are extracted; moreover, if judgment is made that the authentication domain field carried by the message is the same with a second authentication domain field of the self-loop detection message, self-loop exception of the access network is determined. The invention can detect various self-loop conditions in the access network.

Based on surplus energy of battery, each node sets up timer in selfadaption. When definite time is reached, node becomes 'head of cluster' automatically and broadcasts message, and adjacent nodes adds to the cluster selectively, becoming 'general node'. When time of forming maximal cluster is reached, all nodes of not choosing own role become 'head of cluster' automatically. Thus, entire network is divided into 'head of cluster' and 'general node' so as to form hierarchical management system. Using surplus energy of battery at node, the invention balances load of system. Through correlation parameters of adjusting algorithm, the method guarantees even distributed head of cluster generated. Simulation result shows that number of forced communication between node and base station is reduced; service life of network is prolonged, and efficiency of energy consumption is raised.

The invention discloses a conveyer capable of quantitatively and automatically feeding materials at definite time, which comprises a stand, a conveying belt and a control device, wherein the conveying belt is driven by a main motor and is arranged obliquely; a fixed hopper is arranged above the feed end of the conveying belt; a rotary hopper is arranged below the discharge end of the conveying belt; the rotary hopper is arranged on a weighing mechanism; the control device is connected with the main motor, the rotary hopper and the weighing mechanism; and the control device controls the working states of the conveying belt and the rotary hopper according to the set working procedure. The invention effectively solves the problem that the traditional tea conveying device only can be used for continuously conveying tea but does not have a function of quantitatively conveying tea at definite time. The conveyer of the invention can be used for quantitatively feeding materials for tea production lines at definite time, is suitable for whole tea production processes, effectively improves the degree of automation of tea production, improves the production efficiency and has obvious economic benefit.

The invention discloses a method for achieving fixed point multimedia advertising play through GPS positioning and a GPRS network. The method comprises the following steps: uniformly releasing and controlling advertisings through a sending terminal in a media center; downloading video programs instantaneously or in advance through the GPRS network by utilizing a transmission server and storing the advertisings in a movable device; and then playing specific programs in different times or spaces through the movable device by utilizing GPS positioning information. By adopting the method, the fixed point multimedia advertising play can be updated immediately, have various manners, and can be conducted in definite time and position according to the demands of customers.

The invention relates to a method and a device for carrying out calibration and timing of an electric meter, in particular to the method which carries out the timing of the electric meter on the basis of the GPS technology and the device thereof. The method which carries out the timing of the electric meter on the basis of the GPS technology comprises the following steps of: a. using the GPS to obtain the current time information; b. calibrating the current time at the definite time; c. carrying out the timing of the electric meter by a broadcast communication mode. The invention further discloses the device for carrying out the timing of the electric meter on the basis of the GPS technology, comprising a GPS receiving module, an MCU module and a broadcast communication module. The method and the device can ensure the accuracy of a clock of the electric meter and prevent the time and the date from being forged and modified illegally. At the same time, the method and the device are characterized by simple structure, convenient implementation and low cost.

The invention provides a novel method for preparing an A-type molecular sieve membrane, which adopts preparation of the molecular sieve membrane in a flow system. The method comprises the following steps: a silicon source, an aluminum source, an alkali source and deionized water are prepared into precursor sol of A-type molecular sieve according to certain proportion first; a vector membrane tube which is precoated with A-type molecular sieve crystal seeds is fixed inside a synthesis reactor; the molecular sieve precursor sol which is heated to a given temperature is conveyed into the synthesis reactor through a slurry pump, and the precursor sol is driven to flow and circulate on the surface of an outer membrane of the vector membrane tube; and the A-type molecular sieve membrane can be obtained after flowing, circulating and crystallization for a definite time at the given temperature. The preparation method provided by the invention has the advantages that the preparation method can basically solve the problem of concentration gradient during the synthetic process of he molecular sieve, is favorable to the preparation of the uniform, continuous and compact molecular sieve membrane with superior separation performance, and is particularly suitable for preparing the molecular sieve membrane for industrial application.

The invention belongs to the communication technology field, in particular to an automatic reminding system and a method. The automatic reminding system comprises a database, a timing device, a retrieval and judgment module and a transmission module, wherein the database is used for storing reminding data; the timing device is used for setting a time granularity and notifying the retrieval and judgment module to retrieve the database when the time granularity comes; the retrieval and judgment module is used for retrieving the reminding data in the database at a definite time and judging whether reminding data exist in the database, if so, judging whether the reminding data meet the reminding conditions, and if so, transmitting the reminding data to the transmission module; and the transmission module is used for acquiring the corresponding reminding data in the database so as to generate a reminding file and finish transmission. By using the automatic reminding system and the method, data to be reminded can be stored in the preset database according to a preset format, and the reminding data can be scanned at a definite time, so that the corresponding reminding file can be automatically transmitted at the preset reminding time, thereby enabling work to be handled in time.

This invention provides a method for protecting ether loop circuit redundancy avoiding network storm resulted from loop circuit to make the topology converge quickly. A master device receives its sent ether loop circuit detection control message correctly in definite time to determine the existence of the redundancy, if it exists, the master device blocks the required protected VLAN message. The method checks the break of the ether circuit with devices on the circuit and sends control message about the break, the master device removes the data message block when receiving the control message of the break .This invention can detect the topology variance quickly and process the packet blocking.

The invention discloses a method for transmitting distress signals by using a mobile terminal and the mobile terminal. The method includes the following steps: the mobile terminal is switched into a power down mode from a normal working condition; the mobile terminal is awaken from the power down mode at a definite time, and transmits distress short messages including the position information of the mobile terminal to a preset number. The distress signals can be transmitted by the method for transmitting distress signals and the mobile terminal in the invention, thereby being capable of saving electrical power, increasing the persistence of the distress signals, attracting rescues as much as possible, and competing in changes of survival for the user.

The invention discloses a method and a system for updating multiple devices. The method comprises the following steps of: updating a target device connected with a root updating source by the root updating source; acquiring version information of a device connected with another target device in definite time by the other target device, and judging whether updating is required; and requesting to update a file to a corresponding new version device for updating when updating is required. According to the embodiment of the invention, the device is simultaneously combined with active updating and passive updating, and the new version device can provide updating service for an old version device, so that quick updating of all devices is realized, and automatic updating can be realized after an off-line device or a newly added device is on line.

The invention relates to a method to definite-time list item process in communication device. It uses time label counter parameter when taking definite-time process to the item on list. Thus, the precision of definite-time process is improved. Moreover, it can adjust the precision by adjusting the number of counter of the time label. The invention could satisfy the request of precision of different people. And it is especially suited for ageing treatment for communication device. For example, the invention is used to take ageing treatment for MAC address list, even if the ageing refresh granularity precision request of MAC address is not very high during process, the maximum error may caused is only half of threshold value of ageing time, when the width of the chosen time label is one.

The invention relates to a four-dimensional cinema synchronous play method based on Ethernet. The basic idea of the invention is as follows: in a system formed by a controller and two players, playing windows of the two players respectively correspond to the content of a left path and a right path; the controller terminal sends inquiring and control instruction to the two players in definite time; after receiving the inquiring and control instruction, the two players sample the current playing position information and send the current playing position information to the controller terminal; the controller judges the playing position of the players according to the received information, coordinates the playing behavior of the two playing windows of the players so as to form a closed-loop feedback structure. The invention adopts a RJ41 Ethernet card interface, takes a twisted-pair as the connection of a link and uses the Ethernet to transmit instruction, thereby realizing timely and accurate synchronous control.

The invention discloses a method and a system for dynamically distributing network traffic, and relates to the field of internet, which are used for solving the problem that the prior art cannot avoid bandwidth waste or congestion phenomenon under the condition of the dynamic change of network bandwidth. The method comprises the following steps of: monitoring gateway exit bandwidth at definite time to acquire the current bandwidth data; calculating the traffic of each traffic use unit, which can be distributed from the current bandwidth, according to a traffic distribution strategy and a traffic redistribution algorithm; and redistributing the traffic for each traffic use unit according to the calculating result. The system comprises a monitoring module, a calculating module and a redistributing module. A mechanism for monitoring the gateway exit bandwidth at definite time exists; the traffic of each traffic use unit, which can be distributed from the current bandwidth, can be calculated according to the traffic distribution strategy and the traffic redistribution algorithm; then the traffic redistribution is performed; and therefore, the method and the system have the advantages of realizing the dynamic distribution of the network traffic, effectively and reasonably utilizing the bandwidth and avoiding the bandwidth waste or congestion phenomenon.

The invention discloses a buffer management method which comprises the following steps: when a buffer address is applied, the applied buffer address is marked as applied state; when cycle timing time which is determined according to maximum application time of the buffer address is reached each time by time keeping, the buffer address in the applied state is released. The invention also provides a buffer management system. By utilization of the invention, all applied buffer addresses can be initiatively released in definite time, and all the applied buffer addresses are guaranteed to be able to be withdrawn, thereby buffer leakage is reduced.

This invention relates to a safety system of vehicle monitor information including a CPU and a camera unit, in which, said system also includes a local data access unit, the CPU gets the video information generated by the camera unit in definite time intervals to be edited and processed and stored in the local data access unit, which sets a read control program and refreshes the stored data in terms of the principle of FIFO, therefore, the information storage of this invented safety system does not rely on radio network only and always keeps the latest information as the proof.

The invention discloses a laser raindrop spectrograph capable of continuously and automatically observing, which is characterized in that laser array arranging method is utilized to continuously detect the size, the number and the speed of raindrops, and raindrop spectrum parameters of rainfall, rain intensity and the like are computed according to measured raindrop particle information. A control system comprising DSP (Digital Signal Processor) and a field programmable gate array FPGA is arranged, wherein the FPGA is responsible for completing the data acquisition of each pixel in a CCD (Charge Coupled Device) laser array, and parallel computing ability of the FPGA is shown and an image edge detection arithmetic is utilized to compute the size, the number and the speed of the raindrops; and the DSP analyzes and computes the raindrop spectrum parameters according to the information of the size, the number and the speed of the raindrops and uploads the raindrop spectrum parameters to an upper machine at definite time through a CAN (controller area network) bus.