43results about How to "Overcome mistakes" patented technology

A method and apparatus for the transmission and reception of broadcasted instrumental music, vocal music, and speech using digital techniques. The data is structured in a manner similar to the current standards for MIDI data. Transmitters broadcast the data to receivers which contain internal sound generators or an interface to external sound generators that create sounds in response to the data. The invention includes transmission of multiple audio data signals for several languages on a conventional radio and television carrier through the use of low bandwidth data. Error detection and correction data is included within the transmitted data. The receiver has various error compensating mechanisms to overcome errors in data that cannot be corrected using the error correcting data that the transmitter sent. The data encodes for elemental vocal sounds and music.

A method of transmitting data symbols via an Orthogonal Frequency Division Multiplexed (OFDM) symbols, includes forming data symbols into pairs, generating a first pair of modulation symbols for each of the pairs of data symbols, the first pair of modulation symbols forming first and second modulation symbols of an Alamouti cell, forming a first version of the OFDM symbols by modulating the sub-carriers allocated for carrying the data with the first and second modulation symbols of the Alamouti cells, and modulating the one or more pilot carriers of the first version of the OFDM symbol according to a predetermined pattern. The method also comprises generating a second pair of modulation symbols for each of the pairs of data symbols, the second pair of modulation symbols forming third and fourth modulation symbols of the Alamouti cell formed for the pair of data symbols in the first version of the OFDM symbol, forming a second version of the OFDM symbol by modulating the sub-carriers allocated for carrying the data with the third and fourth modulation symbols of the Alamouti cell, modulating the one or more pilot carriers of the second version of the OFDM symbols according to the predetermined pattern, and transmitting the first version of the OFDM symbol via a first antenna, and the second version of the OFDM symbol via a second antenna. For at least one of the pairs of data symbols, the sub-carriers, on which each of the first and second modulation symbols and the third and fourth modulation symbols forming the Alamouti cells, are separated within the first and second versions of the OFDM symbol by at least one other data bearing sub-carrier or one or more of the pilot carriers.A transmitter and / or receiver according to the invention find application with the Digitial Video Broadcast-Terestrial 2 (DVB-T2) standard.

A system, method, and computer program product perform text equivalencing. The text equivalencing is performed by modifying a string of characters by applying a set of heuristics, comparing the modified strings of characters to known strings of characters. If a match is found, the text equivalencing engine performs database update and exits. If no match is found, sub-strings are formed by grouping together frequently occurring sets of characters. An information retrieval technique is performed on the sub-strings to determine equivalent text.

A controller 7A for generating a drive signal (PWM signal) PS for controlling a switching power supply, comprises control signal setting means 10, 11 for setting a control signal CS on the basis of an output voltage Vo and a target voltage Vr; current estimating means 12 for estimating an inductor current on the basis of the drive signal PS and for generating an estimated current signal PC; DC component removing means 14, 15 for extracting a DC component DC included in the estimated current signal PC and for removing the DC component DC from the estimated current signal PC; DC component resetting means 13, 14 for resetting the extracted DC component DC every predetermined time; and comparing means 16 for comparing the control signal CS with the estimated current signal PC′ after the removal of the DC component DC.

The invention provides a Web service concurrency control method and system based on IOT (Internet of Things)-oriented application. In the system, a concurrency control module is added behind an SOAP (Simple Object Access Protocol) Body content analysis module to realize Web service concurrency control. The concurrency control system comprises two thread pools and one concurrency control model, wherein the concurrency control model comprises a repetition and conflict detection module, a priority level setting module and an execution module; the repetition and conflict detection module comprises a pretreatment submodule, a repeated detection submodule, a filter submodule and a conflict monitoring submodule; the priority level setting module comprises a priority level setting submodule used for carrying out priority level ranking to the conflicted service request message; the execution module comprises a request message pretreatment submodule and addressing submodule, wherein the requestmessage pretreatment submodule is used for ranking the service request marked with the priority level and allocating threads; and all operations of the above modules are based on that the universal description frame of service equipment resources is defined in the SOAPBody.

The invention discloses a master-slave communication system based on SPIs and a reliable transmission method based on the SPIs, and belongs to the technical field of communication. According to the scheme, on the one hand, a master-slave communication time sequence method based on the SPIs is provided, after salve SPI equipment closes an SPI module, an SS signal line of the master SPI is connectedwith a handshake line of the slave SPI, the handshake line can be multiplexed with an SS signal of the slave SPI and can also be a GPIO pin of the salve SPI equipment; on the other hand, the master-slave data reliable transmission method based on the SPIs is provided, a data link layer and an application layer are introduced, and the data link layer has an error retransmission processing mechanism. By means of the methods, the defects are overcome that communication time sequence matching of SPIs is difficult, and the communication reliability is low; the scheme is easy to implement, the hardware cost is low, the reliability is high, the transmission efficiency is high, and the compatibility is high.

The invention relates to a device and method of battery pack balance and protection. The device comprises a main system control unit, an upper computer unit, a programmable high voltage charging unit,a low voltage constant voltage charging unit, a lower computer, a cell detection unit, a hardware protection circuit, a cell unit, a relay and the like. The main system control unit is in charge of receiving an external operation, displaying the current state, controlling the working state of the upper computer unit, receiving information returned by the upper computer unit and conducting corresponding disposal according to the returned information; after receiving control of the main system control unit, the upper computer unit automatically detects other units and uploads detection and processing results to the main system control unit; under cooperative control of the unit, it is ensured that the charging and discharging circulation frequencies and the depths of all cells are generallyconsistent, safety accidents caused in the charging and discharging process of the battery pack are avoided, so that the reliability of the battery pack is improved by a large margin, and the circulation life of the battery pack is prolonged by a large margin.

The invention relates to a position signal interference processing method in a permanent magnet synchronous motor rotor angle measuring device. The angle measuring device comprises a rotary transformer, a rotary transformer decoder and a motor controller. In order to eliminate interference in a measured digital position angle signal, the position signal is processed by the motor controller by adopting median filter and a differential amplitude limiting value, so that the error or fault produced due to interference during angle measurement is effectively overcome, and the safety for engine control is improved.

A method of transmitting data symbols via an Orthogonal Frequency Division Multiplexed (OFDM) symbols that includes forming data symbols into pairs and generating a first pair of modulation symbols for each of the pairs of data symbols, where the first pair of modulation symbols form first and second modulation symbols of an Alamouti cell. The method further includes forming a first version of the OFDM symbols by modulating the sub-carriers allocated for carrying the data with the first and second modulation symbols of the Alamouti cells, and modulating the one or more pilot carriers of the first version of the OFDM symbol according to a predetermined pattern.

A method and a device for supplying a decoder with data stream such as compressed video signal including both non-predictive and predictive data frames of a common data type. A device comprising a decoder for service data is provided with (1012, 1020) a specific frame that is a predictive frame indicating substantially no changes in the service data in relation to a possible previous service data frame supplied. A service data buffer is monitored (1014) and in case it's at least near an underflow condition according to a number of predetermined criteria (1016), the decoder is fed with the specific frame in order to prevent the decoder from being disturbed due to a lack of timely provided proper input data (1018).

A bearing structure coupled to a shaft includes a bearing and a cover element. The cover element is held to the bearing and covers at least one portion of one end of the bearing. The cover element has a turning portion, which has a groove. A motor comprises a rotor structure, a stator structure and a bearing structure. The rotor structure has a hub and a shaft connecting to the hub. The stator structure has a hole, and the shaft is disposed in the hole. The bearing structure has a bearing and a cover element. The bearing is disposed in the shaft hole and coupled to the shaft. The cover element is held to the bearing and covers at least one portion of one end of the bearing. The cover element comprises a turning portion.

The invention discloses a switchgear thermal defect monitoring system, an analysis method and a comprehensive measuring control device thereof. The system comprises an information detecting module, acommunication module and a data processing module, wherein the information detecting module comprises a plurality of data acquisition units at a low-voltage side. The data processing units are respectively mounted in switchgears which are connected with the same bus. The data acquisition unit comprises at least four air temperature detecting loops and at least one current detecting loop. A first air temperature detecting loop is used for an ambient temperature outside the switchgear. A second air temperature detecting loop, a third air temperature detecting loop and a fourth air temperature detecting loop are used for detecting the air temperature of each compartment of the corresponding switchgear. The current detecting loop is used for detecting the load current of the switchgear. Detected data are transmitted to the data processing module through the communication module. The data processing module determines whether a thermal defect of the switchgear exists based on the data transmitted from the communication module. The system can further used for monitoring multiple defects of the switchgear.

A system, method and apparatus for enforcing the administration policy of a system. The method can include receiving a request to perform an administrative task directed to a resource within a computing network. Responsive to receiving the request, an administration policy including a set of rules for governing the administrative task can be retrieved as can state data for the resource. Subsequently, the retrieved policy can be applied to the retrieved state data. Consequently, the administrative task can be permitted only if the retrieved state data satisfies the set of rules in the retrieved policy.

The invention relates to a conveying mechanism for a test tube sorting device. The conveying mechanism comprises a first conveying mechanism and a second conveying mechanism. The second conveying mechanism is located at the outlet end of the first conveying mechanism. The first conveying mechanism comprises a first conveying belt and a first conveying motor. The first conveying motor drives the first conveying belt to move. The second conveying mechanism comprises a horizontal conveying mechanism moving horizontally and a vertical conveying mechanism installed on the horizontal conveying mechanism and moving vertically. The vertical conveying mechanism comprises a test tube clamp used for clamping test tubes. The test tube clamp arranged on the second conveying mechanism is used for clamping test tubes conveyed out by the first conveying mechanism, in addition, the vertical conveying mechanism arranged on the second conveying mechanism can move vertically so that the test tube clamp can be positioned in the vertical direction and clamp the test tubes, and the horizontal conveying mechanism drives the whole vertical conveying mechanism to horizontally move to place the test tubes clamped by the test tube clamp to the corresponding position. The automatic conveying device is adopted, so that errors in manual test tube sorting are avoided, and efficiency is high.

Disclosed is a frequency doubler which controls a magnitude of a signal supplied to a virtual ground by adjusting a gain of one-side transistor among transistors receiving differential input signals when outputting a frequency multiplied LO signal through the virtual ground by amplifying the input differential signals by using a differential circuit structure to minimize undesired harmonics characteristics in a frequency doubled signal output by making the magnitudes of two differential signals be the same as each other.

A length measure apparatus and the method for measuring transform an image from a lens set into a digital contrast image via a central processing unit. The CPU has multiple standard lines that are previously set therein. Multiple movement controllers control a movement of a selected standard line from the CPU relative to the digital contrast image. A movement value is output when the selected standard line flushes with a profile of the contrast image. The measure value is shown on a monitor when the CPU contrasts the movement of the selected standard line.

The present invention discloses an interface ultrasonic reflectivity-pressure relation curve establishment method and a loading testbed. The loading testbed comprises a force displayer, a control terminal, an oscilloscope, an immersion ultrasonic transducer, a large cylinder, a small cylinder, an upper panel, a movable plate, a force sensor, a lower panel, an ultrasonic transceiver and a small cylinder connecting plate. Compared with the existing schemes, the interface ultrasonic reflectivity-pressure relation curve establishment method and the loading testbed provided by the present invention can construct a more accurate ultrasonic reflectivity-pressure relation curve, and are high in detection precision

The embodiment of the invention belongs to the field of artificial intelligence, and relates to a method for establishing an expression recognition model, which comprises the following steps: acquiring multiple pieces of first training image data and multiple pieces of second training image data; obtaining clustering centers corresponding to the multiple pieces of target image data and reference images corresponding to the multiple pieces of target image data according to the feature values; randomly extracting two pieces of target image data of different reference images as first input imagedata to obtain a plurality of pieces of first input image data corresponding to the clustering center; randomly extracting second input images corresponding to different clustering centers to obtain aplurality of pieces of second input image data; and inputting the first input image, the second input image and the clustering center corresponding to the first input image into the EmtionNet. In addition, the invention also relates to a blockchain technology, and the first training image data and the second training image data can be stored in the blockchain. The invention further provides a device for establishing the expression recognition model, computer equipment and a storage medium. And the expression recognition accuracy is improved.

A biometric authentication method if provided for an individual to be authenticated amongst a very large quantity of individuals with an authentication system storing a set of reference information each associated to one of the individuals. The reference information is distributed across a plurality of sub-databases. The method includes a phase of adding reference information representative of a new individual, including selecting the sub-database that is best adapted to store the reference information to be added. A phase of authentication includes: provision by the individual of authentication biometric information and of an identifier forming addressing information, designating at least one of said sub-databases likely to contain the reference information representative of said individual; and searching amongst the reference information stored by the authentication system, of reference information corresponding to the individual, the searching being carried out on a subset of said set of reference information, identified by the addressing information.

The invention discloses a high-voltage switch cabinet with defect monitoring and comprehensive control functions. The high-voltage switch cabinet comprises compartments and a comprehensive detection and control device installed in a secondary chamber, and is characterized in that a first metal shielding cover used for installing a sensor is arranged on a partition plate between the cabinet chamberand a bus chamber in a cable chamber of the switch cabinet, a first preset part of the first metal shielding cover is located at the height J which is 10-40cm away from a lower outgoing line of the circuit breaker and at the position which is 0-15cm from a center line of a phase-B outgoing line of the circuit breaker, and at least part of the first preset part is hollowed out. According to the invention, a detection point for insulation defects and a detection point for thermal defects are integrated to the same part, so that the switch cabinet is further transformed into intelligent power supply equipment with self-monitoring, self-protection and self-control.

Embodiments include systems and methods for applying a controllable early / late offset to an at-rate clock data recovery (CDR) system. Some embodiments operate in context of a CDR circuit of a serializer / deserializer (SERDES). For example, slope asymmetry around the first precursor of the channel pulse response for the SERDES can tend to skew at-rate CDR determinations of whether to advance or retard clocking. Accordingly, embodiments use asymmetric voting thresholds for generating each of the advance and retard signals in an attempt to de-skew the voting results and effectively tune the CDR to a position either earlier or later than the first precursor zero crossing (i.e., h(−1)=0) position. This can improve link margin and data recovery, particularly for long data channels and / or at higher data rates.

The invention provides a method for in-vitro determination of a sun protection factor (SPF) of a powder. A sun protection factor measurement system SPF-290S is used for determination of the SPF value and the UVAPF value of the powder with the coating weight rated value of 1.2 mg / cm<2>, and respectively measures the SPF values and the UVAPF values of the powder with the coating weights of 0.1 mg / cm<2>, 0.2 mg / cm<2>, 0.3 mg / cm<2>, 0.4 mg / cm<2>, 0.5 mg / cm<2> and 0.6 mg / cm<2>; according to a linear relationship between the SPF values and the powder coating weights and a linear relationship between the UVAPF values and the powder coating weights, the SPF value and the UVAPF value of the powder with the coating weight rated value of 1.2 mg / cm<2>, namely the final SPF value and the final UVAPF value of the powder, are calculated. Therefore, the problem that the SPF-290S cannot measure because the powder with the coating weight of 1.2 mg / cm<2> completely shades light is overcome.

A length measure apparatus and the method for measuring transform an image from a lens set into a digital contrast image via a central processing unit. The CPU has multiple standard lines that are previously set therein. Multiple movement controllers control a movement of a selected standard line from the CPU relative to the digital contrast image. A movement value is output when the selected standard line flushes with a profile of the contrast image. The measure value is shown on a monitor when the CPU contrasts the movement of the selected standard line.

The invention relates to a system for intelligent decision-making of concrete dam pouring construction based on knowledge engineering. The system comprises an engineering information base, a construction rule base, an intelligent reasoning system and a function module system. The system for intelligent decision-making of concrete dam pouring construction based on knowledge engineering, and the method for intelligent decision-making of concrete dam pouring construction based on knowledge engineering, both created by the invention, can realize management and decision-making of concrete dam pouring construction through the application of the methods such as knowledge representation, knowledge acquisition and knowledge reasoning of the knowledge engineering and the intelligent reasoning system, with the premise that the technology specification and requirement of concrete dam pouring construction are complied.

A testing device and method for floating rate of floating agent for fracture height control are provided. The test device includes a support frame, a glass tube vertically fixed on the support frame, a floating agent storage container, a control valve, and a liquid storage tank, wherein multiple circular holes are uniformly distributed along an axial direction of the glass tube, and multiple turbidimeters for measuring liquid turbidity are sequentially mounted on the circular holes. The liquid storage tank communicates with an inner cavity of an upper end of the glass tube through a pipeline, and the floating agent storage container is connected to an inner cavity of a lower end of the glass tube through a control valve. The present invention increases accuracy of measured floating rate of the floating agent, and provides reliable floating data of the floating agent for oil and gas reservoir reconstruction.

The invention discloses a field programmable gate array (FPGA)-based superfast auxiliary encoder system (AES) processor and an implementing method thereof. The AES processor comprises an interface storage area buffer module, a control module, an AES encryption and decryption module, a read-only memory lookup table module, a register module and an output module. The implementing method for the processor comprises the following steps: 1, initializing a data table; 2, performing initial setting; 3, receiving data; 4, reading the data; 5, selecting a data processing mode; 6, judging whether the encryption and decryption are finished; and 7, outputting a result. The invention mainly solves the problems that an AES processor is controlled complicatedly and modules have low portability, reliability, safety and processing speed in the prior art; and an improved algorithm and a lookup table-based method are used. The AES processor has all levels of structures which are fixed, is simple in control logic, comprises the modules with high portability, is suitable to be implemented in a singlechip FPGA, and has the characteristics of high speed and high accuracy.

The invention relates to an automatic cruise algorithm for tailing pond dry beach length and beach crest elevation. The method includes the steps of: 1. placing a dry beach measuring instrument at a high spot near a tailing pond, measuring and recording the elevation of the dry beach measuring instrument; 2. presetting a dry beach length cruise track and a beach crest elevation cruise track, seeking a dry beach length measurement point according to the dry beach length cruise track, and seeking a beach crest elevation measurement point according to the beach crest elevation cruise track; 3. recording the distance between the dry beach measuring instrument and the dry beach length measurement point, a horizontal cruise angle and a vertical cruise angle; selecting two reference points on a dam body, recording the distances from the dry beach measuring instrument to the two dam body reference points, horizontal cruise angles and vertical cruise angles, and calculating the dry beach length; and 4. recording the distance between the dry beach measuring instrument and the beach crest elevation measurement point, a horizontal cruise angle and a vertical cruise angle, and calculating the beach crest elevation. The method solves the problems of low accuracy of manual measurement because of environmental constraints in the prior art.

The present invention discloses an interface ultrasonic reflectivity-pressure relation curve establishment method and a loading testbed. The loading testbed comprises a force displayer, a control terminal, an oscilloscope, an immersion ultrasonic transducer, a large cylinder, a small cylinder, an upper panel, a movable plate, a force sensor, a lower panel, an ultrasonic transceiver and a small cylinder connecting plate. Compared with the existing schemes, the interface ultrasonic reflectivity-pressure relation curve establishment method and the loading testbed provided by the present invention can construct a more accurate ultrasonic reflectivity-pressure relation curve, and are high in detection precision.