40results about How to "Meet coverage requirements" patented technology

The invention discloses a self-service charging system of a plug-in type electric vehicle, comprising a plurality of charging stations, a data service center and a mobile communication service center, wherein each charging station comprises ZigBee networking equipment, a charging station computer monitoring center and a plurality of chargers, wherein the ZigBee networking equipment is connected with a ZigBee terminal node device of the plug-in type electric vehicle through a ZigBee wireless communication network; and each charger comprises a charger information management unit, an IC (Integrated Circuit) magnetic card identification device, a touch screen, a printer and a charging device. The self-service charging system solves the problems of unstable electrical connection caused by the wired communication connection of a charging system and the plug-in type electric vehicle and high networking difficulty and implementation cost caused by the wireless communication connection of the charging system and the plug-in type electric vehicle, can realize the self-service charging and has easy and convenient user operation, safety, automated and intelligentized charging process without manual duty; and besides, the self-service charging system can provide multiple types of charging service modes. The invention also discloses a self-service charging method of the plug-in type electric vehicle.

The application form relates to software test core problems, namely test case automatic generation, and provides an invariant technology-combined random test improvement method, namely an invariant-booted random test case automatic generation method, aiming at the defects of currently widely-applied automatic technology, namely a random test method. Two new methods are mainly provided and comprise: filtering invalid test cases by utilizing invariants of the extracted programs, and retaining valid cases; reducing invalid case space by utilizing the invariants of the extracted programs, and improving the probability of selecting valid cases. The methods can be used for reducing the redundancy rate, meeting the coverage requirement and extremely solving the defects of the traditional random methods, are full-automatic in the whole case generation process, without other any input and manual interference except for necessary tested programs.

The invention discloses a video monitoring layout optimization method and device based on a road network. The method comprises steps of based on acquired road network data and multi-dimensional city basic data, calculating high risk degree levels corresponding to nodes in the road network data; according to the high risk degree levels corresponding to the nodes in the road network data, setting acorresponding coverage requirement for the node in each piece of road network data, and finally optimizing the position and the visual range of the camera around the node in each piece of road networkdata based on the position information and the visual range information of the camera in the video monitoring network, thereby meeting the coverage requirement corresponding to the node in each pieceof road network data. According to the invention, the rationality of urban video monitoring layout is evaluated, the layout of cameras in an urban video monitoring system is improved, and no monitoring dead angle is realized.

The embodiment of the present invention provides a PRACH resource configuration method and a PRACH baseband signal generation method and device. The resource configuration method includes the steps: determining the length TSEQ of a random access preamble sequence; determining; determining the number of random access time domains in the uplink time domain of each system radio frame according to thelength TSEQ of the preamble sequence; determining the length Tcp of a CP (cyclic prefix) and the length TGT of a guard interval GT between adjacent system radio frames according to the length of theuplink time domain and the length of the preamble sequence; determining the starting time domain position of the PRACH channel of each random access time domain according to the length of each systemradio frame, the Preamble sequence length TSEQ, the length Tcp of the CP, and the length TGT of the guard interval GT. According to the embodiment of the present invention, the method satisfies the coverage requirement of a broadband communication system and the transmission requirement of the PRACH, and avoids the interference of the uplink PRACH channel to the downlink PBCH by setting the guardinterval.

The embodiment of the invention discloses a child-mother type far-end radio frequency unit and method for realizing indoor deep coverage thereof. The child-mother type far-end radio frequency units are connected through network cables and are connected to an expansion unit through the network cables or photoelectric composite cables. The expansion unit is connected to a baseband processing unit through an optical cable. The child-mother type far-end radio frequency unit comprises a radio frequency capacity type mother unit which is used for receiving and transmitting digital baseband signals of a baseband processing unit. The radio frequency coverage type subunit is used for receiving the intermediate frequency signal of the radio frequency capacity type mother unit, converting the intermediate frequency signal into a radio frequency signal, and transmitting the radio frequency signal to a built-in antenna of the radio frequency capacity type mother unit after passing through the filter amplifier. More than two external antenna interfaces are arranged in the radio frequency capacity type mother unit, and the external antenna interfaces are used for being externally connected with more than two radio frequency coverage type subunits through network cables. Through the child-mother type far-end radio frequency unit, the line loss can be reduced, and the coverage requirement can be met. In addition, implementation and maintenance are convenient, capacity expansion is easy, and overall manufacturing cost is low.

The invention discloses a high-dynamic satellite signal capturing method and system based on code Doppler compensation, and the method comprises the steps: sequentially carrying out the correlation integral calculation, buffering processing and frequency spectrum shifting of the storage data of a to-be-captured satellite signal, meeting the requirements of a high-dynamic Doppler frequency coveragerange, reducing the correlation peak attenuation caused by Doppler, and reducing resource consumption of subsequent incoherent accumulation; enabling the frequency spectrum shifted data to enter an FFT module, and calculating an integral value, Doppler frequency and incoherent accumulation times on a preset numerical code phase respectively; utilizing the Doppler frequency, the incoherent accumulation times, the integral value on the preset numerical code phase and the preset integral time to calculate the offset and dislocation incoherent accumulation of the related peaks, thereby reducing the energy dispersion, enhancing the capture sensitivity in the high-dynamic environment, and reducing the average capture time by half. The increase of code phase search times caused by dislocation incoherent accumulation is compensated, and the capture speed, capture sensitivity and resource consumption are balanced.

The invention discloses a data stratified sampling method for an application appraisal expansion platform of an information technology (IT) system. The method comprises a stratification step and a sampling step. The method can be used for quickly and effectively stratifying the records in the conventional data table so as to bring convenience to further sampling, the stratification and sampling algorithms reflect that the functions of the records of each category in the sampling records are equivalent to those in the original data table, and the coverage requirement for evaluating various records is met.

The invention discloses an optimized method of variable k coverage for a two-dimensional intrusion monitoring region. The method comprises the following steps: step (1), abstracting an intrusion object as a point and constructing a two-dimensional monitoring region coverage model of single point intrusion; and step (2), meshing a two-dimensional monitoring region according to the two-dimensional monitoring region coverage model of single point intrusion and a grid clustering algorithm, performing clustering according to the coverage of each grid cell after meshing, movably deploying sensor nodes in the two-dimensional monitoring region according to the comparison of the current coverage with the desired coverage, and finally realizing the variable k coverage of the two-dimensional monitoring region. According to the method, the nodes are re-deployed to realize flexibly variable coverage of different regions at different times; in the case of limited sensor nodes, the effects of the nodes are developed thoroughly to ensure multiple coverage of a key region and also satisfy the coverage requirement of a common region; as a result, effective monitoring on the intrusion object can be realized at the cost of consuming less energy.

The invention belongs to the technical field of mobile communication, and discloses a content increment transmission method for a mobile communication network, and a mobile communication system. The trusted node in the network is allowed to intelligently analyze the data content in the process of storing and forwarding the data, and the positive and negative increment processing is carried out onthe transmitted data volume to realize content increment exchange. The method can be operated in a transport layer according to an open system interconnection reference model, and comprises a contentincrement forward transmission mechanism and a step-by-step response mechanism. The method comprises that the trusted node combines with the context information stored in the trusted node to carry outthe positive increment or negative increment operation on contents of a transmission control protocol message segment, thereby completing forward transmission of data; and then, after receiving the data, the nodes at all levels carry out step-by-step feedback on a forward transmission result of the data. The method is oriented to non-delay sensitive services, content increment exchange is achieved by means of the storage computing capacity of the nodes, and the resource utilization rate and the communication efficiency are improved.

The invention relates to a production method of rice weeding paper. The rice weeding paper is produced by the aid of a common cylinder paper-making machine, main pulp materials of the rice weeding paper include unbleached sulfate softwood pulp and unbleached sulfate hardwood pulp, and auxiliary raw materials of the rice weeding paper include carbon black, rosin size, aluminum sulfate, polyamide polyamine epichlorohydrin serving as wet strength agents and polyacrylamide serving as retention agents. A papermaking process includes that the main pulp materials are sequentially subjected to repulping, defibrination, proportioning, sizing, cylinder papermaking, pressing, vat drying, surface gluing, after-drying and winding to form finished paper. The rice weeding paper has the advantages that the rice weeding paper is light in weight, low in cost and air permeability, high in opaqueness, green and environmentally friendly, the longitudinal strength of the paper is high by the aid of the cylinder papermaking process, field covering requirements can be effectively met, excellent sunshine shading and air isolation performances are achieved, growth of field weeds is prevented or reduced, pollution is avoided, the rice weeding paper can serve as fertilizer to be used, and pollution-free agricultural production is achieved.

A meteorological information acquisition system based on wireless network includes N data acquisition devices, N data transmission units, a router, and a remote monitoring center, wherein n is a positive integer; each data acquisition device is suitable for the real-time acquisition of meteorological parameters; each data transmission unit is connected to a data acquisition device, and transmits the meteorological parameters to the router through a wireless way; the router is applicable to transmitting the meteorological parameters to the remote monitoring center; the remote monitoring center is for storing the meteorological parameters and providing weather forecast information by comprehensive analysis on the gas parameters. The meteorological information acquisition system based on wireless network provided by the invention has low cost, wide coverage and high data transmission rate.

The invention discloses a wireless communication system and a method for sending an uplink synchronization channel as well as a corresponding wireless frame structure and a preamble structure in a wireless subframe. The wireless communication system comprises a sending party and a receiving party; and the sending party sends preambles to the receiving party by an uplink synchronization channel, wherein the preambles are sent at six resource blocks of frequency domains of one or more subframes of a wireless frame that the uplink synchronization channel is located at. And each of the preambles includes a cyclic prefix and a sequence according to a timing sequence, wherein the sequence's duration is 4096Ts or 2048Ts. Variation of the duration of the sequence can correspond different duration of the cyclic prefix. According to the invention, a coverage requirement of a wireless local area network can be met; wireless resources can be fully utilized; the number of multiplexing subscribers can be improved; collision probability of uplink random access is reduced; and the system throughput is improved.

The invention relates to an ultra-wideband antenna and a resonance method thereof. The ultra-wideband antenna is characterized in that two working modes at low frequency and two working modes at highfrequency are excited at the same time by a matching structured synthesized by double-F-shaped routing, and five resonance working modes are achieved by the four working modes and one self-resonance of an antenna body at high frequency. The ultra-wideband antenna structurally comprises a printed circuit board 5 and an antenna component and is characterized in that the antenna component is arrangedat the upper end of the printed circuit board to form the whole antenna system; the antenna body is connected with a transceiver through a feeder, the other end of the feeder is connected with a feedsource, a grounding wire attaches to a support and is connected with the antenna body and the printed circuit board through a matching circuit, and five resonance working modes are excited by the joint effect of the matching structure, the antenna, the feeder and the grounding wire. The ultra-wideband antenna has the advantage that the five resonance working modes are excited by the joint effectof the matching structure, the antenna, the feeder and the grounding wire to achieve frequency coverage of low frequency 80-1400MH and high frequency 2-4.5GHz and a wideband effect.

The present invention discloses a method for covering tunnels in a TDD system. The method comprises steps of selecting two paths of signals from multiple paths of signals output from a remote-end radio-frequency unit (RRU) and using the selected two paths of signals to cover the tunnels. By adopting the two paths of signals or even more paths of signals to cover the tunnels, not only the downlink signal transmitting power is improved greatly, but also the uplink signal receiving gain is greatly improved. Therefore, real cover distance is increased and tunnel cover requirement is satisfied preferably. The present invention also provides a device for covering tunnels in a TDD system and a system for covering tunnels in a TDD system.