174results about How to "Reduce performance requirements" patented technology

The invention discloses an electric vehicle-mounted terminal based on cloud computing and a using method thereof. The electric vehicle-mounted terminal comprises a cloud client, a communication module, a human-machine interaction module, a positioning module, an identity identification module, an electric energy metering module, a charge / discharge control module and a CAN (controller area network) data interface. The cloud client is connected with the identity identification module, the positioning module, the human-machine interaction module, the communication module, the electric energy metering module, the charge / discharge control module and the CAN data interface respectively; a cloud server is connected with the communication module; an identity identification card and a vehicle identification card are both connected with the identity identification module; an electric energy meter is connected with the electric energy metering module; and a vehicle information system and a battery management system are both connected with the CAN data interface. Through the invention, the operation reliability of the vehicle-mounted terminal is improved; more personalized services are expanded; the structure and layout of the vehicle-mounted terminal are simplified, and the expandability of the vehicle-mounted terminal is improved; and the user does not worry about data loss, virus invasion and the like, and convenience is provided to the managers in finding the problems of the vehicle and battery in time.

The invention discloses a high strength and toughness Q460E structural steel thick plate. The thick plate comprises the following chemical components by weight percent: 0.10-0.17% of C, 0.20-0.45% of Si, 1.30-1.65% of Mn, 0.018% or less of P, 0.007% or less of S, 0.015-0.050% of Als, 0.025-0.060% of Nb, 0.055-0.070% of V, 0.015-0.025% of Ti and the balance Fe and residual elements. The carbon equivalent [Ceq = C+Mn / 6+(Cr+Mo+V) / 5+(Ni+Cu) / 15] is no more than 0.48. The production method comprises the following technologies: KR molten iron pretreatment, converter smelting, argon-blowing treatment, ladle furnace (LF) refining, vapor deposition (VD) refining, die casting, heating, controlled rolling and controlled cooling and stack cooling. On the basis of ensuring the original components of the high strength and toughness Q460E structural steel, the contents and ratio of the alloy elements in the Q460E steel, namely C, Mn and Nb are adjusted properly; the content of harmful elements in thesteel such as P and S which can influence the plasticity and toughness of the steel plate can be strictly controlled; the heating cycle of steel rolling is strictly controlled; and the rolling process adopts the ways of reducing the finish rolling temperature, increasing the cooling rate after rolling and perform stacking and slow cooling to the steel plate after rolling, thus each performance index of the steel plate meet the standard requirement.

The invention discloses a method and a system for displaying a webpage by a mobile terminal. The method comprises the following steps that: a client sends a request for accessing an appointed webpage of a user to an agent server; the agent server acquires a webpage resource of the appointed webpage from a webpage server of the appointed webpage, processes the webpage resource to obtain webpage data to be constructed, renders and arranges the webpage data to be constructed to form a structural body, converts the structural body formed by rendering and arrangement into binary data and returns the binary data to the client; and the client resolves the received binary data, draws a webpage content according to a resolved result and displays the drawn webpage. By the method and the system, the requirement on the performance of mobile terminal equipment when the mobile terminal equipment accesses the webpage is reduced; and even processing equipment of the mobile terminal is not provided with a kernel for rendering and arranging the webpage or an application programming interface (API) for supplying a webpage engine, the webpage can be still displayed.

The invention relates to a method of operating an ultrasonic flow meter by digitally sampling received signals. Acoustic wave packets are transmitted through a measuring distance in opposite directions, and the received signals are digitized at a sampling frequency being below the Nyquist-limit of two times the signal frequency of the wave packet to generate digitized under-sampled signals 31. From the digitized under-sampled signals, the difference in propagation time along the measuring distance is determined.

The invention discloses a weldable fine grain structural steel S355NL / S355NLZ35 steel plate, which comprises the following chemical components by wt%: 0.10-0.18of C, 0.20-0.45 of Si, 1.20-1.45 of Mn, less than or equal to 0.018 of P, less than or equal to 0.005 of S, 0.015-0.050 of Als, 0.010-0.055 of V, 0.005-0.025 of Ti, and the balance Fe and residual elements. The production method consists of: KR molten iron pretreatment, converter smelting, argon blowing treatment, LF (ladle furnace) refining, VD (vacuum degassing) refining, continuous casting, heating, controlled rolling and controlled cooling, stack cooling, and normalizing. According to the invention, content and proportion of C, Mn and Nb alloy elements are adjusted properly, and content of harmful elements in steel like P and S etc. influencing the plasticity and toughness of the steel plate is strictly controlled, and meanwhile, the heating system of steel rolling is strictly controlled. The rolling process employs a mode of lowering finish rolling temperature, speeding up cooling after rolling, and conducting steel plate stacking and slowing cooling after rolling, thus guaranteeing all performance indexes of the weldable fine grain structural steel S355NL / S355NLZ35 steel plate meeting the standard requirements.

The present invention relates to the signal process and mode identification field, in particular to a canonical correlation analysis-based non-invasive load identification method. The canonical correlation analysis-based non-invasive load identification method is characterized by starting from the current data on a bus, processing a transient current during a load switching process, firstly extracting the multi-dimension waveform features of the transient current, secondly extracting the S-transform harmonic features of the transient current, and then using the correlation analysis to fuse themulti-dimension waveform features and the S-transform harmonic features, and finally using a SVM classifier to classify the loads, thereby realizing the load on-line decomposition. By using the canonical correlation analysis to fuse the multi-dimension transient current waveform features and the S-transform harmonic features, a final fused feature set has the better representational capacity, hasthe multi-dimension waveform feature identification advantage to the general loads, and also has the identification advantage to the similar loads in details. By using the canonical correlation analysis to fuse the two types of features, the non-invasive load identification method has the better identification feature to the loads of which the electrical properties are similar.

The invention discloses a communication safety control method and device, a first mobile terminal and a mobile health device. The communication safety control method comprises the steps of generating first data related to an instruction to be transmitted; utilizing a first encryption key and the transmission serial number of a current data package of the first mobile terminal to generate second data; combining the first data and the second data to obtain a first transmission data package; sending the first transmission data package to the mobile health device to enable the mobile health device to compare third data with the second data, utilizing the first data to obtain and carry out the instruction when the third data are the same as the second data, and discarding the first data when the third data are not the same as the second data, wherein a second encryption key is obtained by calculating unique identifying information of a second mobile terminal bound with the mobile health device, and the third data are data generated by utilizing the second encryption key and the transmission serial number of the data package. According to the communication safety control method and device, the first mobile terminal and the mobile health device, the safety performance of the mobile health device is improved.

The invention relates to the field of forging of tool and mold steel, in particular to a superhigh-temperature crossed large-deformation forging method for improving the structure uniformity of tool and mold steel. The superhigh-temperature crossed large-deformation forging method for improving the structure uniformity of the tool and mold steel comprises the steps that firstly, superhigh-temperature demolding is conducted on a poured steel ingot belt liquid core; secondly, the steel ingot belt liquid core is placed in a insulated van for temperature uniformization and conveyed to a forging press, and three-direction crossed large-deformation forging is conducted on the steel ingot belt liquid core, so that branch crystals formed at the tail stage of solidification are sufficiently crushed, a large quantity of isometric crystal structures are formed, shrinkage cavities and looseness are eliminated, and dendritic segregation is relieved; and finally, conventional forging formation including upsetting, drawing-out and the like is conducted. According to the superhigh-temperature crossed large-deformation forging method for improving the structure uniformity of the tool and mold steel, a conventional method that forging is conducted after a die-cast steel ingot is completely solidified is broken, and a semi-solid structure with the steel ingot core having excellent fluidity and a huge surface and core temperature difference are created through superhigh-temperature demolding of the belt liquid core; forced feeding and pressure solidification are achieved through a three-direction crossed large-deformation method, and the developed branch crystals formed at the tail stage of the solidification of a tool and mold steel ingot are effectively crushed; central hole defects are overcome through welding, the problems of shrinkage cavities, looseness, segregation and the like are completely solved, and the metallurgical quality of products is improved.

The invention discloses a multi-live load balancing method and system applied to an openstack cloud platform, and belongs to the field of cloud computing pass. The technical problem to be solved by the invention is how to meet the requirements of four-layer and seven-layer flow load balancing, avoide a single-point fault of the load balancing node, achieve the maximum utilization rate of the loadbalancing node performance, and improve the resource utilization rate of the physical server on the cloud platform; the adopted technical scheme is as follows: the method comprises the following steps: open-source LVS and NGINX are used for carrying out load balancing on four-layer flow and seven-layer flow respectively; through cooperation of an open source quagga virtual router of an ospf protocol and a physical switch supporting the ospf protocol, multi-path selection is carried out; a multi-active mode is realized, and communication with a virtual machine in a tenant vpc is performed through an external network shared by tenants on an openstack platform, so that cross-vpc load balancing is realized. The system adopts a micro-service software architecture and comprises a UI layer, a back-end micro-service layer, an atomic micro-service layer and a far-end SLB-AGENT layer.

The invention discloses an E1 emulation realization method, which relates to the field of network simulation and comprises the following steps of: performing protocol encapsulation on a direction, and performing serialization processing on received data to generate a real-time transport protocol value; assembling a time division multiplexing (TDM) payload into a frame, forming cache data packets by using the processed data, and finishing a corresponding description table; attaching packet headers to the TDM payload, generating control word information and real-time transport protocol information according to configuration, and performing encapsulation according to a protocol; performing clock domain adaptation on the processed data, finishing Ethernet media access control (MAC) processing, and transmitting Ethernet data by using a media independent interface (MII); performing protocol decapsulation on the direction, receiving and caching the Ethernet data, and finishing MAC layer processing; classifying and identifying the Ethernet data packets, extracting the payload and related control bytes, and counting state information; and performing clock recovery on a processed TDM payload code stream, and externally transmitting the processed TDM payload code stream. The method is relatively lower in cost; updating can be performed; and requirements on the performance of a central processing unit (CPU) are reduced, and clock recovery performance is improved.

The invention belongs to the field of satellite communication, and discloses a spatial distribution type satellite group design method. The method comprises the following steps: formulating a satellite group common rail scheme; designing a topological structure; formulating a functional load and a division strategy; formulating an in-orbit configuration reconstruction and function reconstruction method; designing a satellite group flexible networking method; designing an inter-satellite high-speed data transmission method; designing a multi-satellite distributed synthetic coverage method; designing a multi-satellite distributed joint calculation method; designing a satellite group intelligent self-healing method; designing a rapid emergency adjustment method; and designing a star group scale expansion and star group cluster construction method. The method has the advantages that the orbital utilization efficiency is improved through multi-satellite common-orbit combination, the satellite group capacity is enhanced through high-speed interconnection transmission, quick response is achieved through on-orbit self-healing reconstruction, the coverage area is increased through a distributed array antenna, the on-satellite processing capacity is improved through distributed joint calculation, and the method is particularly suitable for design of space distributed satellite groups.

The invention discloses a digital single-cycle control method for a multiplexed-output magnetic bearing switch power amplifier. According to the method, the duty ratio of a public bridge arm power device is fixed, only bus voltages, N paths of inductive currents and N paths of given current signals need to be sampled, and the PWM control signals of the power devices of N loaded bridge arms can be obtained through a digital controller in a computing mode. According to the digital single-cycle control method, a public bridge arm does not need to be controlled independently, the digital control structure of the switch power amplifier can be effectively simplifier, few DSP chip resources are occupied, the real-time computing capacity is improved, the changes of the currents with different polarities of N paths of output currents can be met at the same time, the complete decoupling control over the N paths of output currents is achieved, control precision is high, dynamic responses are good, arithmetic speed is high, implementation is simple, and high economic value and practical value are achieved.

The invention discloses a method for detecting data collection omission in a traffic collection device and relates to an information security technology in the technical field of information. The method comprises the following steps: step 1 is discovery of omission of active IP data, and step 2 is discovery of omission of active domain name data. According to the invention, a DNS data source is used to supplement original data, and data which has the attribute of a computer room is extracted, and then a simulation request is performed, such that the performance demand for the simulation request is reduced, a more comprehensive simulation request is also provided, and discovered omission is more comprehensive and accurate. When the simulation request is performed, an http (get / post) requestis firstly performed, and then afterwards, data whose simulation request result return values are not within a reasonable scope is subjected to an https (get / post) request. Such a mode, compared to amode of performing http&https simulation requests on all data, can reduce the performance demand for the simulation request, and compared to a mode of only performing the http simulation request, canalso enhance comprehensiveness of the simulation request. According to the invention, the network supervision level can be effectively improved, and data missed by an information security managementsystem is discovered for analysis of omission reasons of the information security management system.

The invention discloses a centralized safety control method and a centralized safety control device. The method comprises the steps as follows: a central node checks identity with the intelligent device after monitoring that some intelligent device accesses a local network, and stores a digital security certificate and a public key of the intelligent device after the check is passed, and adds the intelligent device in a safety equipment list; the central node generates a conversation key for the intelligent device and transmits the conversation key to the intelligent device; the central node transmits the safety equipment list, which has been encrypted by using the conversation key to the intelligent device based on an inquiring request of the intelligent device so that the intelligent device could select target equipment for conversation; the central node transfers the conversation information interacted by the intelligent device and the target equipment while the intelligent device initiates a conversation with the selected target equipment. The method and the device of the invention change a point-to-point security policy into centralized safety control, thereby reducing the performance requirement, operation complexity and cost of the intelligent device.

A real-time SLAM scene map constructing system, a navigation system and a method are disclosed. The system overcomes a difficult problem of real-time map constructing for SLAM navigation systems whenscene changes are large, such that a robot can obtain accurate positioning information in a changed scene. The real-time SLAM scene map constructing system includes at least two independent SLAM mapping subsystems having fixed spatial locations. The SLAM mapping subsystems are configured to send spatial geographical location information and collected local scene map information into which a timestamp is added to a core server. The core server is configured to determine the relative location relationship among local scene maps having same timestamps according to the spatial geographical location information of the SLAM mapping subsystems, thus fusing the local scene maps having same timestamps to generate a real-time overall SLAM scene map.

The invention relates to a hydraulic support pose and linearity detection system and a work method thereof. According to the device, multiple guyed displacement sensors are utilized to detect relative full poses of adjacent hydraulic supports, detection signals of the multiple guyed displacement sensors are processed in real time, the complex pose information is converted into the simple pose matrix information, information transmission volume is substantially reduced, the time of the top board pose matrix information and the foundation pose matrix information of each hydraulic support for respectively occupying pose signal transmission cables is shortened, performance demands of information transmission of hundreds of working face working face hydraulic supports in a pose detection process for transmission equipment are reduced, the waiting time in the information transmission process is shortened, remote transmission capability of the pose matrix information is improved, and remote pose monitoring on the hydraulic supports is realized.

The invention discloses a diffusing process of a low-square resistance crystalline silicon cell. The diffusing process of the low-square resistance crystalline silicon cell uses a conventional diffusing furnace, and prepares a low-square resistance cell with higher efficiency than that of a high-square resistance crystalline silicon cell by changing diffusing doping concentration distribution; and the diffusing process of the low-square resistance crystalline silicon cell can reduce dark saturation current of an emitter and front surface recombination velocity, can increase voltage of a short circuit and an open circuit, does not increase other cell preparation processes, and is a diffusion technology with a great developmental value.

The invention provides an anti-fog controlling method for a refrigerator camera. A refrigerator comprises a refrigerator body, a door body and a heating wire used for heating the camera. The anti-fog controlling method comprises the following steps that when the refrigerator starts to operate, the heating wire heats the camera with the power P1; when someone is detected to get close to the refrigerator and is about to open the refrigerator door body, the power of the heating wire is regulated and the heating wire heats the camera at the power P2; whether the refrigerator door body is open or not is detected; if the refrigerator door body is open, whether the refrigerator door body is closed or not is detected; if the refrigerator door body is closed, the power of the heating wire is regulated to recover to P1 to heat the camera; if the refrigerator door body is not closed, the camera temperature T1 and the environment temperature T2 are detected and compared; if T1 is greater than or equal to T2, the power of the heating wire is regulated to P1 to heat the camera; and if T1 is smaller than T2, the power of the heating wire is regulated to P3, and the camera is heated. The anti-fog controlling method for the refrigerator camera solves the problem that the shooting is vague and unclear due to the fogged camera, and can lower the energy consumption.

The invention discloses a movie theatre multi-subtitle system based on the psychological visual modulation display technology and a method thereof. The system comprises a display device and an auxiliary watching device which is matched with the display device. A group of composition bases comprising video contents and different languages of subtitles are arranged according to specific time and space and played by the display device, and the composition bases played in any time and areas are common component parts of multiple images or component parts of one image. Time domain or spatial domain amplitude modulation is performed on the composition bases played by the display device by the auxiliary watching device. The modulated information is finally integrated into the required images in the human brain via a user human eye visual system. According to the characteristics of constantly increasing refresh frequency and spatial resolution of the existing display devices and the limited resolution of human eyes under certain observation distance, the display device and the auxiliary watching device which is matched with the display device and can be customized according to the requirements are adopted so that the movie theatre multi-subtitle system is realized.

The invention relates to a positioning method and system based on an RFID technology. The method comprises the steps that S1 at least one RFID reader-writer performs data acquisition on at least one RFID tag and transmits acquired data to an application unit, the application unit calculates the acquired data by adopting an LANDMARC algorithm so as to confirm indoor position information of the RFID tag; S2 a geographic information unit inquires geographic position information of the RFID tag according to the indoor position information, generates a map according to the geographic position information, and a display unit displays the indoor position information in the map. By adopting the technical scheme, the performance demand for RFID reader-writer hardware can be reduced, an indoor positioning result is visually displayed in actual geographic environment information so that the indoor positioning result can be displayed intuitively and specifically, seamless switching of indoor positioning and outdoor positioning is achieved, and combination and analysis of the indoor positioning and outdoor positioning are facilitated.

The invention discloses a real-time charging method and system, wherein the method comprises the following steps: receiving a request for charging a user sent by a service system; predicting the service application amount of a user by using a preinstalled prediction model and the historical application record on services of the user; calculating the amount of an account required by the predicted service application amount and judging whether the current account balance of the user is sufficient or not; and if the current balance is sufficient, freezing the amount of the account required by the predicted service application amount, and returning the predicted service application amount to a service system, thereby being convenient for the service system to control the service for the user according to the predicted service application amount. According to the invention, not only is the user charge ensured to be not overdue, but also the rest part of the account balance of the user can be applied to other services, thus better meeting the charging requirement of a prepayment system.

The present invention relates to a cloud platform for medical data processing. The cloud platform comprises an application service layer, wherein a software system of the application service layer has data input / output, data display and data transmission functions; a cloud computing service layer, wherein a software system of the cloud computing service layer is equipped with a plurality of medical data processing modules, each medical data processing module is correspondingly provided with a respective data processing algorithm and has an input / output of a uniform format according to a data format standard of the cloud platform; a cloud storage service layer, wherein the cloud storage service layer supports data storage according to the cloud platform standard and has a data format extension capability; and a data layer, wherein the data layer has a cloud platform access capability and performs two-way transmission of data with the cloud storage service layer through the internet. Medical data can be analyzed, processed and visualized at the internet cloud, requirements of hospitals on data processing device performance are reduced, and a more flexible deployment mode is provided.

The invention discloses a method for realizing application content charging. The method comprises the following steps: a gateway node obtains application access information of a user on a cloud application hosting platform; a content charging bill of a corresponding application is generated according to the application access information and a locally saved content charging rule, wherein the content charging rule includes the IP address and port information; the charging system obtains the content charging bill to generate specific charging related to a specific application. By the method and the system for realizing the application content charging, disclosed by the invention, the applications are hosted to the cloud application hosting platform and allocated with corresponding IP addresses and port information, so that the gateway node carries out content charging according to the IP address and port information of the applications saved on the cloud application hosting platform. The IP addresses belong to the IP address field of the cloud application hosting platform, so IP address rules managed by the gateway node are reduced. Therefore, the processing performance is enhanced. In addition, the invention also discloses a system realizing application charging.

The embodiments of the invention disclose a method and a device for processing domain name requests. By extending the type of a domain name request or configuring an equipment type of user equipment in the domain name request, a DNS server can sense the request intention or the equipment type of the user equipment and further returns an A record and / or an AAAA record which is required by the user equipment and adapts to the network condition to the user equipment, so that the blindness of the DNS response is reduced, unnecessary operations of query and generation of the A record or the AAAA record are avoided, unnecessary network address translation operation is avoided and the performance requirement for the DNS server and an NAT server is reduced. Besides, an access gateway does not need to assign domain name requests to different DNS servers for user equipment of different types, so that the configuration complexity and distribution processing complexity of DNS server distribution of the access gateway are reduced and the network deployment is convenient.

The invention discloses a distributed crawler system architecture, a data crawling method and computer equipment, and the method comprises the steps: obtaining a crawler task through a task publishingmodule, and transmitting the crawler task to a crawler module; after obtaining the crawler task, enabling the crawler module to call a target crawler service corresponding to the crawling requirementfrom the crawler service module, and crawls original crawler data from a target website by utilizing the target crawler service; and storing the crawled original crawler data in a preset first storage module. According to the distributed crawler system architecture, the distributed crawler data crawling method, the computer equipment and the like, the crawler service module is arranged, bottom-layer requirements of the whole crawler system are packaged, modularized and serviced, the workload of developers is reduced, the development language of the developers is not limited, and the capacityrequirements are reduced; and the stability and the expansion capability of the crawler system are improved through architecture design.

The invention discloses a device and method for time delay and phase adjustment of an antenna signal. The method comprises the steps that a time delay adjustment value and a phase adjustment value at the current moment are obtained according to a time delay estimated value and a phase difference estimated value at the current moment and a time delay adjustment value and a phase adjustment value at the previous moment; an integral-multiple time delay value and a fractional-multiple time delay value are obtained through calculation according to the time delay adjustment value at the current moment; the phase of a sampling clock signal is adjusted according to the fractional-multiple time delay value, so that the sampling clock signal processed through fractional-multiple time delay is obtained; sampling is carried out on the antenna signal through the sampling clock signal processed through fractional-multiple time delay, so that a digital antenna signal processed through fractional-multiple time delay is obtained; the digital antenna signal processed through fractional-multiple time delay is adjusted through the integral-multiple time delay value, so that a digital antenna signal processed through time delay adjustment is obtained; a signal for secondary frequency mixing is obtained through the phase difference estimated value, and the signal for secondary frequency mixing is used for carrying out secondary frequency mixing on the digital antenna signal processed through time delay adjustment, so that an antenna signal processed through time delay and phase difference adjustment is obtained.

The invention provides a balance feed sampling receiver. The balance feed sampling receiver comprises a sampling pulse signal generating circuit, a sample integral retaining circuit and a differential amplification circuit, wherein the sampling pulse signal generating circuit is used for shaping a double-end drive pulse signal to generate a pair of balanced picosecond sampling pulse signals, the front end of the sample integral retaining circuit is electrically connected to the sampling pulse signal generating circuit and the input end of a pulse signal to be sampled, the sample integral retaining circuit is used for carrying out downsampling on the pulse signal to be sampled through the balanced picosecond sampling pulse signals and carrying out underclocking and reconstructing on the base band waveform of the pulse signal to be sampled, the front end of the differential amplification circuit is electrically connected to the sampling integral retaining circuit, and the differential amplification circuit is used for carrying out differential amplification processing on the base band waveform of the reconstructed pulse signal to be sampled and obtaining a low-frequency base band signal widened in the time domain. The balance feed sampling receiver can integrally reconstruct the pulse signal to be sampled, the sampling bandwidth is high and adjustable, and the application requirement of an ultra wide band radar system is met.

The invention relates to a fuel cell engine system integration scheme. The fuel cell engine system integration scheme comprises a galvanic pile package structure and a hydrogen treatment system, an exhaust system is distributed at one end of the galvanic pile package structure, and an intake system is distributed at the other end of the galvanic pile package structure. The hydrogen treatment system is distributed on one side of the lower end of the galvanic pile package structure, and a thermal management system is distributed on the other side of the lower end of the galvanic pile package structure. The fuel cell engine system integration scheme has the compact structure and can be used for A0-class vehicles; the safety performance is good, and the galvanic pile is packaged to ensure thatthe hydrogen leaked from the galvanic pile does not gather in an engine compartment; the engine can be started at a temperature of -25 DEG C. A cooling pipeline is highly integrated to reduce the capacity requirement of the whole vehicle water pump. The fuel cell engine system integration scheme has the protection level of IP67 through an upper air outlet and a lower air outlet, and the main function is to protect the galvanic pile from dust and rain, and ensure the normal operation of the galvanic pile.

The invention discloses a multi-task-oriented testability index determination method, and aims to provide a multi-task-oriented testability index determination method so that the error of the determined product multi-task testability index is within the allowable range. The technical solution is: first collect relevant data information, then determine the comprehensive performance index requirements of the product, and then determine the relationship between product performance requirements and testability indicators for each stage of the product, and determine the corresponding fault detection rate rFDi and fault isolation rate rFIi and other tests Performance indicators, and finally determine the product test performance indicators required by multi-tasking. Adopting the present invention can continuously circulate and correct while ensuring that the comprehensive performance index requirements of the product are met, so as to obtain the product testability index requirement value of the multi-task requirement of the minimum testability index error ratio, and meet the system comprehensive performance index requirements.