269results about How to "No overhead" patented technology

A wireless communication system, wherein packet transmission operations are carried out in an infrastructure mode, includes: a first terminal station serving as a data transmission source; a second terminal station serving as a data receiving destination; and a control station configured to contain each terminal station and relay a packet transmitted between the two terminal stations; wherein the first terminal station transmits a packet addressed to the second terminal station via the control station, and detects that the second terminal station is within range capable of a direct link, based on the first terminal station receiving a confirmation response packet replied from the second terminal station, the confirmation response packet being replied from the second terminal station upon a predetermined period of time having passed from the time of the control station transferring the packet to the second terminal station address.

A circuit board system is adapted to check a DUT (Device Under Test) and a communication device on a DUT board, check the connection between DUT and communication device and check connections of parts mounted on DUT board. The system, which tests a circuit board used when a DUT is tested using a tester, has a socket into which DUT is removably inserted; a communication device mounted thereon; first wires electrically connecting first signal terminals of DUT and the tester; and second wires electrically connecting second signal terminals of DUT, which are not electrically connected to the first signal terminals, and signal terminals of the communication device. A shorting board is inserted into the socket in place of DUT when the circuit board is tested, the shorting board having short-circuit wires electrically connecting the first wires and the second wires.

This invention relates to a system and a method for providing a measure of reliability on a first set of health data (102) on a patient (103) provided by a data provider. An assigner (105) is used for assigning at least one first rating element to the first set of health data or the data provider. A reputation-indicator (106) uses the at least one first rating element as input data in determining a first reputation measure indicating the reliability of the data provider. A comparer (107) then compares the determined first reputation measure with a pre-defined reputation threshold measure, the reputation threshold measure being a measure of a pre-set reliability level of the data provider.

The invention provides a hardware Trojan horse detection method and a hardware Trojan horse detection system. The method includes the following steps: collecting a by-pass signal of a to-be-detected integrated circuit; extracting features of the by-pass signal to form a feature collection; calculating mahalanobis distance values, including a mahalanobis value of a reference integrated circuit and a mahalanobis value of the to-be-detected integrated circuit, of the feature collection; comparing the mahalanobis value of the reference integrated circuit with that of the to-be-detected integrated circuit, and performing hardware Trojan horse detection according to a comparison result. By the hardware Trojan horse detection method and the hardware Trojan horse detection system which have the advantages of simple algorithm and short detection time, distinguishability and efficiency of hardware Trojan horse detection in integrated circuit testing are effectively improved, and any cost for hardware is not generated.

A relay apparatus (100) for relaying a data packet to be transmitted from a first partner transceiver to a second partner transceiver comprising a receive unit (110) for receiving the data packet and for receiving an acknowledgement packet to be transmitted from the second partner transceiver to the first partner transceiver when the second partner transceiver has successfully received the data packet. The relay apparatus (100) further comprising a help detector (120) for providing a help indicator if a help required situation is detected and a transmit unit (130) for transmitting the data packet in response to the help indicator. The help required situation is detected based on whether a first communication link between the relay apparatus (100) and the second partner transceiver is better than a second communication link between the first and second partner transceivers, the second communication link being evaluated by an information being available from the data packet.

The invention discloses a positioning device using a phased array principle and in combination with RSSI (Received Signal Strength Indicator) range measuring, and relates to the technical field of ultrahigh radio frequency identification, in particular to the positioning device using the phased array principle and in combination with the RSSI range measuring. The positioning device using the phased array principle and in combination with the RSSI range measuring comprises a reader, a passive electronic tag and a group of array antennas, wherein the passive electronic tag corresponds to the reader; and the reader comprises a digital baseband circuit, a transmitting end and a receiving end. In the device, the direction angle of the reader and the tag to be positioned is mainly determined through a phased array antenna, the field strength value reflected by the tag read by the reader is then utilized to map the distance between the reader and the tag, and the position of the electronic tag can be obtained through operation of an algorithm. The device can be used for tracking and positioning a target at an open place or in an indoor environment. Since the phased array antenna is introduced, the radiation distance can be increased while the antenna gain is increased; meanwhile, the range of radiation is also expanded. The positioning device has the advantages of simple system and large positioning range.

The invention discloses a high-precision harmonic analysis method improved on the basis of quasi-synchronous discrete Fourier transformation (DFT). The method comprises the step: changing the position of a frequency domain sample according to the drift of signal frequency when harmonic analysis is performed by applying the quasi-synchronous DFT, wherein the position of the frequency domain sample is mu2pi / N, and mu is the drift of the signal frequency, and mu is equal to 1 when the signal frequency does not have the drift. The harmonic analysis method disclosed by the invention comprises thinking: a variable barrier, i.e. the position of the frequency domain sample is changed according to the drift of the signal frequency when the harmonic analysis is performed. The technology disclosed by the invention is beneficial to more accurately obtaining the information, such as the amplitudes, the initial phase angles, the frequencies and the like of all harmonics in the fields of applying the harmonic analysis, such as the fields of power quality monitoring, electronic product production inspection, electric equipment monitoring and the like.

The present invention provides a multi-screen display system and a multi-screen display setting method. The multi-screen display system includes a computer host and multiple displays, the computer host is provided with an acquisition module, used for acquiring mouse movement path; a monitor module, used for monitoring acquired mouse movement path, when failure of the mouse crossing the display boundary or the unconformity of the entering display with the prospect is monitored, touching an adjustment module; a adjustment module, used for adjusting the multiple-screen display according to the touch of the monitor module, ensuring the display entered by the mouse match with the prospect. The technical solution of the invention automatically processes multiple-screen display set according to the moving track of the mouse, when processing the multiple-screen set, need not remember the number and relative position of each display, having simple operation, need not increase new hardware consumption, having lower cost.

The invention discloses a book cloud sharing and management method and platform based on a position service. The method comprises: sending a book search request from a borrowing client to an application server, wherein the search request comprises search keywords and position information of a book sharer; receiving the search request and synchronously uploading the latest book borrowing information issued by the sharer via the application server; searching a book according to the keywords, matching the searched book to the position information of the book sharer and positioning the book according to the position information of the book sharer by the application server; making a response, displaying the position of at least one book sharer in a map and providing a direct communication probability for the borrower and the sharer based on a near position algorithm. The platform comprises a geographic position module, a book management module and an interaction module. The method and the platform provide a novel book borrowing mode, and people can borrow books from one another based on an Internet mobile end.

The invention discloses a gun camera and dome camera linkage system-based coordinate correlation method. The method includes the following steps that: as for the same scene, monitoring images of a gun camera to be calibrated and a dome camera to be calibrated are acquired; a first scale space image set and a second scale space image set are generated based on the monitoring images; extreme value sampling points are selected from the first scale space image set and the second scale space image set respectively, and a certain number of matching point combinations are screened from different scale space image sets; a certain number of calibration point combinations are further screened from the matching point combinations; a calibration matrix of the monitoring images of the gun camera and the dome camera is acquired according to the coordinates of the calibration point combinations; and pixel points in a second monitoring image, which are corresponding to specified pixel points in a first monitoring image can be determined. According to the prior art, errors exist on a calculated calibration matrix, and as a result, a corresponding relation between the gun camera and the dome camera is not accurate, and the problem of linkage tracking failure may be brought about, while, with the method of the invention adopted, the problem in the prior art can be solved.

The invention discloses an operating method of a resistive current on-line monitoring system of a metal oxide arrester (MOA). Fundamental wave parameters of a resistive leakage current of the MOA are usually obtained according to a projection method. The method comprises the following steps of: sampling an electric network voltage and an MOA leakage current signal at the same time; acquiring a fundamental wave amplitude value and an initial phase angle of the electric network voltage by using a quasi-synchronization discrete Fourier transformation (DFT) harmonic analysis technology of a variable fence; acquiring the fundamental wave amplitude value and the initial phase angle of the MOA leakage current by using the quasi-synchronization DFT harmonic analysis technology of the variable fence; acquiring a projection angle of a fundamental wave of the leakage current on the fundamental wave of the electric network voltage according to the projection method; and acquiring the fundamental wave of the resistive leakage current of the MOA, and outputting and displaying the fundamental wave. By adoption of the operating method of the resistive current on-line monitoring system of the MOA, the analysis error of the quasi-synchronization DFT harmonic analysis technology is effectively avoided, and a high-accuracy harmonic analysis result is obtained, so that the reliability in test of the resistive current of the MOA based on a harmonic analysis theory is improved.

The application provides a system and a method for disaster recovery in internet application, so that a problem of data access in large-scale internet application can be solved. The disaster recovery system, which is a complete set of solution schemes, carries out leveled disaster recovery on an internet application system; and real-time active-standby synchronization is carried out respectively at various levels including a database, caching, and service access. Therefore, it can be ensured a standby computer is immediately switched for usage when there is a problem at the database; and when there are invalidated cache data, data can be loaded from a standby cache file; and when a service logic server fails to carry out access, the access can be carried out form the standby computer. Because the whole set of the disaster recovery system does not carry out disaster recovery for a single point, a data access situation in large-scale application can be well adapted to, thereby maximizing service availability for users and further ensuring security and an access success rate for large internet data access.

The invention discloses a method for transmitting real-time data and non-real time data by an Ad Hoc web radio station, comprising the following steps of: (1) dividing data time slots provided for users into static time slots, competition time slots and preserve time slots, wherein the static time slots are distributed to various users in the web, are only used by corresponding users and adopt astatic TDMA (Time Division Multiple Address) occupied mode, the competition time slots can be used by various users and adopt a time slot ALOHA occupied mode, and the preserve time slots can be used by various users and adopt an end-to-end control packet handing occupied mode; (2) transmitting real-time data in the static time slots; (3) transmitting competition data during competition; and (4) transmitting preserve data during preservation. By using the method, the real-time data are transmitted at the static time slots and the non-real time data are transmitted at the completion time slots and the preserve time slots; and on the basis of maintaining a static TDMA access protocol to the maximum extent, the method provides a more flexible access means for the users.

The invention provides a data race detection and evidence generation method based on multithreaded program constraint building. The data race detection problem is converted into a constraint solving problem by building a constraint expression according to the multithreaded program semanteme, a constraint solver is used for detecting possible data races and program execution paths triggering the data races are generated; the data race detection and evidence generation method comprises the steps of firstly, carrying out the instrumentation of the detected program, executing the program and obtaining an execution path, secondly, converting the execution path into a quantifier-free first-order logic expression covering all feasible thread interleaving according to the multithreaded program execution semanteme, thirdly, building a data race candidate set according to the sequential relationship of statements when a data race happens and generating candidate conditions for races, and finally, traversing the candidate set to determine whether the data race exists, and if so, generating a corresponding evidence sequence. The method is capable of finding out all data races in once operation without misinformation; for each data race, the evidence sequence indicating the trigger process of the data race is generated.

The invention provides a physical-information fuzzy inference based smart power grid attack detection method. According to the method, attack behaviors are judged by a physical-information fuzzy inference method by means of analyzing electricity measurement data and network communication flow of a smart power grid and by the aid of a tight coupling characteristic of a physical system and an information system of the smart power grid, and thereby false alarm rate in detection can be decreased remarkably, and smart power grid attack detection effect is improved.

The present invention provides a method and apparatus for estimating channel quality information, a base station and a network central processing device. According to the embodiments of the present invention, a macro cell includes multiple transmission points, the method can comprise receiving the channel quality information which is measured by a user equipment based on a cell specific reference signal; obtaining channel matrix information the multiple transmission points; calculating beamforming information on a single cell transmission and a coordinated multi-point transmission based on the channel matrix information; and estimating the channel quality information for the single cell transmission and the coordinated multi-point transmission based on the channel quality information, the channel matrix information, and the beamforming information. With embodiments of the present invention, it is possible to provide coordinated multi-point gains with no overhead introduced and it is compatible with the existing available user equipments.

The invention discloses an environmental noise filtration method and device. The invention can largely weaken the effect of outside noise on speaking voice and greatly improves communication quality. An art scheme of the invention is that the method and device collect the environmental noise through a first pickup equipment, collect the communication voice including the environmental noise through a second pickup equipment, connect the differential amplification circuits of the first and the second pickup equipments through a connection, and output the difference of the environmental noise signal and the communication voice signal after the amplification. The invention can be applied to all speaking systems, which utilize a microphone.

The invention discloses a working method of an improved high precision medium loss current tester based on quasi-synchronization DFT. The method comprises the following steps: simultaneously sampling a voltage signal V and a current signal I which are applied on a tested piece; applying variable fence quasi-synchronization DFT harmonic wave analysis technology to obtain a fundamental wave phase angle of applied voltage; applying the variable fence quasi-synchronization DFT harmonic wave analysis technology to obtain a fundamental wave initial phase angle of the current signal; calculating dielectric loss tangent according to a formula. According to the working method, an analysis error of the quasi-synchronization DFT harmonic wave analysis technology is effectively improved, a harmonic wave analysis result with high precision is obtained, and reliability of a medium loss current test is raised.

The invention relates to a time delay estimation method based on the Pattern delay coding underwater acoustic positioning. The method includes: determining corresponding relations of a signal form sending a Pattern signal, pulse time delay inequality and a location information code; establishing a duplicate signal corresponding to relevant operation; respectively intercepting a Pattern pulse in a received signal, and first time relevant operation is performed for a intercepted signal and the duplicate signal; a first time relevant operation result and a detection threshold value are compared, if in the first time relevant operation result, only one relevant peak value exceeds the detection threshold value, location information of a transponder is calculated according to the corresponding relations of time delay inequality of PLFM pulse relevant peaks and NLFM pulse relevant peaks, the pulse time delay inequality and the location information code, and otherwise, mutual relevant operation is performed for a first time relevant result of PLFM pulses and a first time relevant result of NLFM pulses, a largest peak value is found in the mutual relevant operation, and the location information of the transponder is calculated according to the largest peak value.

The invention relates to the field of communication, and discloses a communication frequency point dynamic switching method, an Ad-Hoc network node, and an unmanned plane remote control system. According to the invention, the method comprises the steps: starting a communication frequency point mechanism when the Ad-Hoc network node detects that the communication quality decreases to a certain threshold value; notifying an opposite end node to obtain measurement time slots with the fixed interval for measuring pilot frequency points; carrying out the measurement of the pilot frequency points in a pilot frequency list in the measurement time slots, so as to capture the clean pilot frequency points to serve as target frequency points for frequency point switching; and carrying out the switching of communication frequency points. Therefore, the method can dynamically switch the communication frequency point to a clean frequency point when the Ad-Hoc network is disturbed by interference, and guarantees the communication quality of the Ad-Hoc network. Moreover, the method is simple in implementation, and does not need to increase hardware cost.

The invention discloses a wireless sensing network node positioning and calibrating method based on a trusted neighbor distance. The method includes a step of determining connectivity of all nodes in a network, a step of acquiring distances between each unknown node and different anchor nodes, a step of estimating an initial position coordinate of each unknown node and a step of calibrating positions of unknown nodes which have neighboring anchor nodes. Through use of connectivity difference, the wireless sensing network node positioning and calibrating method enables optimal estimation of the distances between the unknown nodes and the neighboring anchor nodes to be carried out. When initial positions of the unknown nodes are acquired, initial estimated positions of the unknown nodes are calibrated through use of the trusted neighbor distance so that positioning precision is improved efficiently. And in the method, no extra hardware devices are added to exchange information with the nodes so that no communication cost is added and energy consumption is low.

The invention discloses an improved DV-Hop algorithm based on optimum node communication radius. The algorithm comprises the steps of: determining a beacon node optimized distribution mode and optimum node communication radius through the actual parameters of a monitored area; then obtaining minimum hops from all nodes to a beacon node in a network, wherein the beacon node uses a least square method to calculate average hop distance according to the positions of other beacon nodes and minimum hops in distance and broadcasts the average hop distance to the network; when an unknown node receives a correction value for the first time, calculating the distance from the unknown node to the beacon node; and finally calculating the coordinates of the unknown node. Before nodes are deployed, according to the actual situation of the monitored area, the beacon node optimized distribution mode is obtained through error analysis; by using the node distribution characteristic of a wireless sensor network to obtain the optimum node communication radius, the communication overhead is not increased; and by using the least square method to obtain the average hop distance of the beacon node and conducting weighting processing to optimize the position of the unknown node, the positioning performance of the nodes in a random network is effectively improved.

The invention relates to the field of optical fiber communication, discloses a three-dimensional orthogonal frequency-division multiplexing data modulation method and a data demodulation method, and aims to solve the technical problem of incapability of lowering signal PAPR (Peak to Average Power Ratio) under the condition of not influencing other performances of a system in the prior art. The method comprises the following specific steps: performing three-dimensional data constellation points mapping on a bit sequence to be transmitted to obtain an orthogonal frequency-division multiplexing (OFDM) signal based on three-dimensional mapping; performing three-path overlapping on the real parts and imaginary parts of a plurality of time domain signals obtained after performing three-dimensional inverse discrete Fourier transform (3D-IDFT) on a three-dimensional OFDM symbol respectively through a three-dimensional CAP orthogonal filter, and combining to obtain final transmission time domain data; acquiring data to be transmitted through the time domain signal of a 3D-CAP-OFDM system and transmitting the data to be transmitted. By adopting the methods, the technical effect of effectively lowering the signal PAPR under the condition of no influencing the other performance of the communication system is achieved.

The invention is concerned with the interference method for in-phase channel and the section search method, it is uses the P-SCH Specific method to interfere the first short code, the Segment-1 Specific method to interfere the second code, and builds cascade connection of the frequency domain; the section search method can obtain the index of the first short code by using the in-phase channel list index interrelated first interfered code list; and obtain the index of the second short code by using the primary index interrelated second interfered code list. The invention resolves the problems of collision and the first short code interference randomly, the second short code interference randomly, and also detects the S-SCH short code embed set.

The invention relates to a method for improving the tracking accuracy of a digital single-pulse system. In a digital single-pulse system, when the sound noise ratio of an incoming signal drops, the directing of the digital single-pulse unit wave beam is changed by adjusting the weighing coefficient of the baseband array signal in a digital wave beam former, and the included angle between unit wave beams is increased; the reduction in the tracking accuracy due to the dropping of the sound noise ratio of the incoming signal is minimized, so as to maintain the tracking accuracy. The invention needs no modification in term of hardware on an existing digital single-pulse system, is easy to realize, of low cost and high feasibility; needs no cost in term of hardware and needs only add very few calculation on the digital signal processor; can automatically improve the tracking accuracy with the degradation of the sound noise ratio of an incoming signal, weaken even eliminate any influence of the degradation of the sound noise ratio on the tracking accuracy; can improve to certain extent the accuracy and compensate any shortcoming in system design if the design of the tracking system is not thoughtful and the tracking accuracy is not far from the requirement from an applicable standard.

The invention provides a disaster tolerance backup system and method in an internet application. The disaster tolerance backup system and method aim to solve the data access problem in the large-scale internet application. The disaster tolerance backup system is a whole set of disaster tolerance solution scheme, leveled disaster tolerance backup is achieved for an internet application system, host and stand-by-computer real-time synchronization is conducted on all levels of a database, cache and service access respectively, and it is guaranteed that a standby computer is switched and used when problems exist in the database, when one part of cache data is invalid, data can be loaded from a backup cache file, and when access to a service logic server is failed, access can be conducted from the standby computer. Due to the fact that the whole set of disaster tolerance backup system does not conduct disaster tolerance on a single point, the system and method can better adapt to the access data situation of the large-scale application, available services of users can be guaranteed to the maximum degree, and thus the safety and the access success rate of large-scale internet data access are guaranteed.

The invention relates to a wireless sensor network technology, and discloses an abnormal data analysis method and a wireless sensor node. The abnormal data analysis method comprises the following steps: S1, after a reading xt is obtained at a moment t by a node i, and whether the xt is an abnormal value or not is judged according to all readings in the current window, if yes, a step S2 is executed, and if no, a step S3 is executed; S2, readings of k neighbor nodes are obtained at the moment t by the node i, and the cause of the abnormal value of the xt is judged accordingly, if the cause is resulted from hardware or software errors, a step S4 is executed, otherwise, a step S5 is executed; S3, the xt is stored by the node I; S4, the xt is divorced from the node i; and S5, the xt is sent to a base station by the node i. The node comprises a data acquisition module, an abnormal data analysis module, a storage module and a wireless communication module. According to the technical scheme, the computation is finished within the neighbourhood of the node, so that the network flow expense is reduced; and by the use of the space-time relevance of data, the abnormal value is detected automatically, the cause of the abnormal value is analyzed, and the misdeclaration and false declaration events are avoided.

A processing apparatus comprising a register that stores operand data, a register data reading section that reads operand data stored in the register, a coefficient table set storage section that stores a coefficient table storing Taylor series operation coefficient data, a coefficient data reading section that reads the Taylor series coefficient data from the coefficient table set storage section using the degree information of the Taylor series and the coefficient table identification information and a floating point multiply-adder that executes the Taylor series operation using the coefficient data read by the coefficient data reading section, data read from the register.

This invention discloses an assigning method for persistent occupied resources including: a base station sends a message assigning a first kind of persistent occupied resource to a UE carrying with ID of a first kind of channels and takes a supplement field in the message valid, in which, part of radio resource instructed by the ID of the first kind channels belongs to the currently occupied persistent resource of the UE, after receiving the assigning message, the UE releases the resource occupied currently same to the that in the instructed first channel ID and increases other resources not belonging to the persistent one of the UE as its own persistent resource. This invention also discloses related base stations, UE and a radio system.