44 results about "Test error rate" patented technology

Memory cells are programmed and read, at least M=3 data bits per cell, according to a valid nonserial physical bit ordering with reference to a logical bit ordering. The logical bit ordering is chosen to give a more even distribution of error probabilities of the bits, relative to the probability distributions of the data error and the cell state transition error, than would be provided by the physical bit ordering alone. Preferably, both bit orderings have 2^M−1 transitions. Preferably, the logical bit ordering is evenly distributed. The translation between the bit orderings is done by software or hardware.

A method and device for providing error protection for a data bit stream in a digital telecommunications transmissions transmission system in order to reduce the bit error rate, characterized in that wherein, before channel coding, a multiplicity number of previously known dummy bits are inserted in a non-terminating fashion at predetermined bit positions in a primary data bit stream near to on both sides of information-carrying bits, in particular on both sides thereof.

A method and apparatus for reducing the information error rate of a communication network. The apparatus comprises a selector device coupled to a Framer and to an Interleaver. The selector device is configured to receive system information and the Framer is configured to receive user information. The apparatus is coupled to equipment which operate the communication network based on system parameters. The apparatus and method of the present invention improve the coding and effectively increase the interleaving depth applied to user information thus reducing the information error rate of the communication network without having to alter or modify any of the system parameters.

The embodiment of the invention provides a test system and method for testing a TCMS. The system comprises a simulation signal subsystem, a vehicle simulation subsystem, an MVB subsystem and a hard wire interface subsystem. The simulation signal subsystem can output a vehicle driving platform or automatic driving instruction, and each functional module in a train can be simulated in the vehicle simulation subsystem. Therefore, the software of the TCMS can be comprehensively tested through the simulation signal subsystem and the vehicle simulation subsystem. In addition, the hardwire signals between the train and the TCMS can be tested through the hardwire interface subsystem to realize TCMS hardware interface testing. The simulation signal subsystem and the vehicle simulation subsystem generate test control instructions and simulation data and manual input is not needed, so that the test efficiency is improved, the test error rate is reduced, and the comprehensive test of the TCMS function is also realized.

A voltage supplied to an SRAM (static random access memory) in an electronic system is controlled responsive a level of activity in the electronic system. If the level of activity is higher, the voltage is kept lower; if the level of activity, the voltage is increased, reducing soft error rate in the SRAM. For example, one indicator of the level of activity is how frequently the SRAM is accessed. If the SRAM is accessed less frequently, a higher voltage value is used to supply the SRAM than if the SRAM is accessed more frequently. A higher voltage provides a lower soft error rate (SER), but increases power dissipation. The SRAM dissipates less switching power when it is infrequently used and therefore a higher voltage value can be supplied to the SRAM during such times of infrequent use without causing excessive power dissipation by the electronic system.

The invention provides a method for identifying the authenticity of a banknote based on banknote anti-counterfeiting point multiple-feature fusion. The method comprises the following steps: the same weak classifier is trained by an AdaBoost algorithm for different training sample sets; the weights of the training samples and the weak classifier are adjusted according to wrongly-classified training samples in the training sample sets and the situation of training sample wrong classification in the weak classifier; the weak classifier is retrained after the training sample sets are redistributed; the above steps are repeated, and T weak classifiers and the weight corresponding to each weak classifier are obtained after the weak classifier is trained T times; the T weak classifiers are integrated into a final strong classifier; and the trained strong classifier tests a test sample set, statistical analysis is made on the test error rate, and the steps are repeated until the steps are repeated a set maximum number of times T and a classification model based on fusion of anti-counterfeiting points of the sample sets is obtained.

The invention discloses an efficient high-bit rate signal bit error rate test method. The method comprises the following steps that: step 1, a satellite transmits high-bit rate data signals, and the high-bit rate data signals are connected with a noise source, after noises are added to the high-bit rate data signals by the noise source, output power is divided into two paths, wherein one path is connected with a spectrum analyzer so that the spectrum analyzer can measure a spectrum and a signal to noise ratio, and the other path is connected with a high-bit rate demodulation device so that the high-bit rate demodulation device can perform demodulation; and step 2, error rate test software is enabled, the number of the measurement times of the software is set to be N, and the number of the measurement times is a ratio of time when the satellite transmits the data to singe measurement time, and the range of the output power of the noise source is set, and the range can be set according to the power of the transmitted signals, and N is a natural number. With the method of the invention adopted, bit error rate-signal to noise ratio curve calibration time is greatly shortened, and a bit error rate curve can be accurately calibrated.

The invention provides an antenna test method and system and a wireless terminal, and relates to the field of antennae. The antenna test method and system and the wireless terminal can reduce the test error rate. The method is applied to the wireless terminal. The wireless terminal comprises an antenna and a test circuit, wherein the antenna is electrically connected with one end of the test circuit, and test equipment outside the wireless terminal is electrically connected with the other end of the test circuit. The method comprises the steps that the test circuit receives test signals sent by the test equipment and transmits the test signals to the antenna, and the test circuit receives reflected signals which are reflected by the antenna and correspond to the test signals and transmits the reflected signals to the test equipment so that the test equipment can determine parameters of the antenna according to the reflected signals. The antenna test method and system and the wireless terminal are applied to the antenna test technology.

The invention provides a report automatic test method, a device, a computer storage medium and an apparatus. The method comprises the following steps: extracting each index contained in a preset report formula specification document; Generating source data files corresponding to each index randomly according to the test requirements, and reporting the source data files to the report server for generating report files of each index according to the test requirements and the source data files; According to the source data file, calculating the result value of each indicator by using the calculation formula of each indicator, and generating the report test file according to the result value of each indicator, obtaining the report file generated by the report server, and testing the accuracy of the obtained report file according to the report test file. The invention solves the problems of incomplete manual test, low efficiency, high cost and high test error rate, effectively improves theaccuracy rate and test efficiency of the report form test, and can better guarantee the stability and accuracy of the product.

The invention discloses a frequency conversion link bit error rate calibration device for a satellite radio frequency testing system, which comprises an arbitrary waveform generator, a radio frequency signal source, a calibrated satellite radio frequency testing system, a spectrum analyzer, an oscilloscope and a computer, wherein the computer comprises demodulation software; and each of the arbitrary waveform generator and the oscilloscope has two channels. A comparison method is adopted for calibrating the bit error rate, that is, the spectrum analyzer, the oscilloscope and the computer are used for composing the bit error rate calibration device, and the tested and obtained bit error rate result is compared with a calibrated instruction receiver to complete bit error rate calibration. The problem that the frequency conversion link bit error rate for the satellite radio frequency testing system at a low bit rate and in a BPSK modulation state in the prior art cannot be measured can be solved, and measurement accuracy is improved at the same time.

The invention provides a front screen and touch screen testing tool, comprising a bottom frame module, a support plate module, a turnover module, a needle die module and a test mainboard. The upper end of the bottom frame module is equipped with the turnover module, which is connected with a carrier. A movable pin and support seats are fixedly mounted on the turnover module. A thrust bearing is arranged between the support seats. One end of the carrier is connected with the movable pin, and the other end is connected with the thrust bearing. The upper end of the carrier is fixedly equipped with the support plate module. The needle die module is disposed at one side of the support plate module. The support plate module and the needle die module cooperate with each other. The test mainboard is disposed at the bottom of the carrier and is connected with the needle die module. With a simple structure, the front screen and touch screen testing tool of the invention is capable of simultaneously testing a front screen and a touch screen, thereby realizing the function of combining two test workstations, improving the test efficiency and reducing manpower cost and test cost. In addition, the operation is convenient, the test error rate is reduced, the product quality is guaranteed, and requirements from customers are satisfied.

The invention relates to the technical field of SMT printing steel mesh appearance detection, in particular to a light-sensitive SMT detecting assembly. The light-sensitive SMT detecting assembly comprises a base, a support, a light source, a lens and a light sensing device. The top end of a vertical support body is fixedly connected with a transverse support body, and the other end of the transverse support body is fixedly connected with a lens holder. The light source is fixedly arranged on the upper surface of the lens, the bottom end of the vertical support body is fixedly connected to the side wall of the base, a first object table is a transparent device, the light sensing device is fixedly arranged on the upper surface of a second object table, a plurality of locating devices are fixedly arranged on the upper surface of the first object table, and an alarm is fixedly arranged below the second object table. A steel mesh and filler parts corresponding to holes of the steel mesh are placed on the first object table to form a light-tight layer, the steel mesh is tested through light irradiation of the light source and induction of the light sensing device on light, the workloads of workers are reduced, and meanwhile the test error rate is reduced.

The invention provides a testing device for a telemetry system. A first simulation signal generating module, a second simulation signal generating module and a digital signal processing module are used to generate various kinds of simulation signals, switching value signals and digital signals to serve as the data input sources for telemetry system testing of a missile aircraft, various kinds of data parameters generated by a telemetry system response data input source are transmitted to an embedded processor of an X86 architecture through a connecting module, whether the operation of the telemetry system is normal or not is judged, self inspection and calibration of each module is achieved by using a signal collecting and detecting module to collect the signals generated by each module, and testing result accuracy is guaranteed. In addition, the testing device integrates functions such as data communication, signal generation, signal demodulation, data collecting and data processing, number of testing equipment for testing the telemetry system is reduced greatly, the size of the detecting device is reduced, the detecting device is convenient to carry, testing error rate is reduced, and testing accuracy and efficiency are increased.

The invention discloses a method for testing code error rate based on a high-speed serial interface coding mode and relates to code error rate testing technology which is provided for solving the problems that the prior code error rate testing mode can not properly test the bit error rate of a signal channel and is complex. The method comprises the following technical proposal: in decoding, the number of code sets which do not meet a coding rule is counted; and the total quantity of transmitted data is calculated so as to determine the code error rate. The invention simultaneously discloses adevice for realizing the method. The method does not need to mount an external code error testing instrument; the calculated code error rate is real-time code error rate of the signal channel and directly reflects the transmission quality of the signal channel; and the tested code error rate has high reference value.

Provided in the invention is a man-machine interactive type testing method for a multi-core cable. The method is characterized in that a cable database containing various parameters of the core wire is established; and the data are inputted, stored, invoked, and displayed by a man-machine interaction device. During testing, a tester inputs any parameter of a to-be-tested core wire; after the to-be-tested core wire is determined, the man-machine interaction device provides all data correlated with the parameter, and the data are displayed in a cable testing pattern one by one and are displayed in a plugging element sketch map by corresponding to the core wire highlight, thereby realizing convenient searching of the tester. The method has characteristics of high reusability, high efficiency, and low test error rate and the like.

The invention relates to an improved semi-supervised image classification method, equipment and a storage medium. The method comprises the following steps: (1) constructing an improved semi-supervised image classification model, wherein the improved semi-supervised image classification model comprises a generator, a judger and a plurality of sub-judgers (secondary judgers); (2) training the improved semi-supervised image classification model; and (3) inputting an image to be classified into the improved semi-supervised image classification model trained in the step (2) to obtain a classification result. The improved semi-supervised image classification model shows a good test error rate, and the classification capability can be better improved by using unmarked images and generated images.

The invention discloses a full-automatic test method for power equipment. The method comprises the steps that test function board cards needed by items are prepared and confirmed, and the needed testfunction board cards are installed on test bottom boards; the to-be-tested board cards are placed in a test preparation area of a test table; a power equipment tester selects a test item, and confirmsthat the test is about to start; a control device controls a manipulator to place the to-be-tested board cards in an electrical test area to complete specified electrical connection; testing is carried out; and after testing is finished, the control device automatically identifies the serial numbers of the to-be-tested board cards and stores test result codes according to the serial numbers of the board cards. The invention further discloses a full-automatic test system for the power equipment. According to the method, the joint test of the multiple items is facilitated, the hardware test cost and the manual test error rate are reduced, and the working efficiency is improved; and automatic testing is completely realized, and the power equipment tester only needs to execute test stating and confirm a testing result.

The invention discloses a router crash test method. The method comprises the steps of S10, randomly selecting a key index, a key type and a key in a database; S30, configuring corresponding key index and key type on a wireless management page according to the key index, the key type and the key, and filling in and storing the key; S41, verifying whether output data of a serial port on a router matches crash reference information or not; S50, indicating that the router is in a crash state when the output data matches the crash reference information; and S60, indicating that the router is not in the crash state when the output data does not match the crash reference information. According to the system, a test for router crash resulting from setting can be automatically finished, the test efficiency is improved, a test cycle is shortened, test costs are reduced, and a test error rate is reduced.

The invention provides a water heater testing device and a testing method. The water heater testing device comprises a constant-temperature water tank and a water supply circulation pipeline, both ends of the water supply circulation pipeline are communicated with the constant-temperature water tank, and a water inlet pipeline and a water outlet pipeline which are communicated with a to-be-testedwater heater are also arranged on the water supply circulation pipeline. According to the water heater testing device and the testing method provided by the invention, by arranging the water supply circulation pipeline, the water inlet pipeline and the water outlet pipeline, the constant-temperature water tank can be controlled to supply water to the to-be-tested water heater; moreover, by arranging a first water pump, a water replenishing valve, a return water valve, a circulating water pump, a first drain valve, a second drain valve, a water inlet valve and a return water valve, under the control of a controller, the to-be-tested water heater can be automatically tested, consequently, labor intensity is reduced, the test error rate is reduced, the testing accuracy is improved, accuracy and efficiency are improved, test and development costs are reduced, and the double benefits of reducing staff and improving efficiency can be achieved.