430results about How to "Strong consistency" patented technology

The invention discloses a distributed key value database system, which comprises a client end and a data server cluster, wherein the client end comprises a Hash module, a positioning module and a forwarding module; the data server cluster comprises a plurality of data intervals; each data interval comprises a host node and a plurality of slave nodes; the host node comprises a first read module, a write module, a first recovery module, a first log module, a first decision module and a first storage engine module; the Hash module is used for receiving a write request sent from a client, and positions the write request to the data intervals according to a key of the write request; each write request is provided with a number distributed by a system automatically; the positioning module is used for positioning the write request to the host nodes of the data intervals; and the forwarding module is used for sending the write request to the write module of the main node. According to the distributed key value database system, strong consistency between data copies is provided under the condition of smaller expenditure.

A method (and system) of emulation in a multiprocessor system, includes performing an emulation in which a host multiprocessing system of the multiprocessor system supports a weak consistency model, and the target multiprocessing system of the multiprocessor system supports a strong consistency model.

A method and a system for maintaining consistency of replicated files distributed over a plurality of independent processing slave nodes part of an application tier of a multi-tier client / server data processing system are described. The replicated files are distributed from a master node of a master tier. Upon reception of an update request to update a master database a new version of a replicated file is first generated and stored in a shared file system. A notification of availability of the new version is forwarded to a synchronizing slave node and broadcasted to all slave nodes. Each slave node preloads the new version of the replicated file from the shared file system and acknowledges successful completion. Upon reception of all acknowledgments in the synchronization slave node a notification of preloading achievement is forwarded to the master server which updates the master database.

The invention relates to the silicon microphone technology field and particularly relates to an MEMS silicon microphone and a preparation method for the same. The method comprises steps of arranging a monocrystal silicon diaphragm above a silicon substrate of a porous back polar plate, performing separation by a silicon dioxide layer, bonding with the silicon substrate of the porous back pole plate through a silicon-silicon bonding method, and forming a capacitor structure of the microphone. Besides, the monocrystal silicon diaphragm is small in residual stress and good in uniformity, which can improve the sensitivity and yield of the MEMS silicon microphone; the diaphragm is provided with other structures like spring supports, projected columns, micro holes, etc, which can fast release the residual stress of the diaphragm, avoids the attraction possibility between the diaphragm and the porous back polar plate and further improves the yield and reliability of the microphone. As a result, the MEMS silicon microphone structure produced by the invention is simple in technology, high in sensitivity, good in uniformity and strong in reliability.

The invention provides a feature extraction and matching method in visual navigation. According to the method, a feature region is extracted by adopting a two-dimensional maximum entropy threshold segmentation method; an external square region of the feature region is subjected to image normalization processing; each external square region subjected to the image normalization processing is used as a feature region to be matched; a feature vector of a feature point is obtained; each feature point in each feature region in a first image is matched with feature points in each feature region in a second image, and the number of matching points is obtained; and two feature regions with the most matching points are selected as matching regions, wherein matched feature points are used as matching feature points. According to the scheme, the number of the matching points is obtained through feature point matching; the feature regions with the most matching points are obtained by using the number of the matching points as a screening condition; the matching of the feature regions is completed; the practical matching pair is further obtained; and the matching points of navigation images with fine, dense and single textures under the condition of generating affine transformation such as shear transformation is increased.

This invention discloses a kind of light imaging function membrane. Calculated in weight percents, it comprises of the following materials and dosage. The main body material 65 to 98 percent; nanometer particulate 1 to 20 percent; assistant solvent 1 to 30 percent. The mentioned nanometer particulate are dispersed in the main body material, forming the membrane with super micro ball structure from 1 to 10 micron. This invention that the light imaging function membrane uses the large quantity of micron balls as the micro lens array to change the light way or focalize to make images. Therefore the optical structure of the light imaging function membrane is well-proportioned, and the light energy using ratio is high. The images are vivid, which efficiently keep the bright spot effect, the color demitint phenomena and the color moving phenomena within limits. It has high resolving ratio and images with high plus, wide visual angle, high luminance, and high contrast, that won't be effected by the surrounding light. So it can be applied in the new-style projecting display screen of front and back projecting.

The invention belongs to building enclosure materials, in particular to a light-transmission-type composite sandwich decorative board with an ultra-large face. In the decorative board, a wholly-reinforced composite sandwich structure of a light-transmission-type FRP (Fiber Reinforced Plastic) panel, a honeycomb core material and latticed FRP reinforcing ribs is adopted, mounting holes are arranged on the periphery and in other specified positions, the product is formed by adopting a die, and the surface is coated with a high-weather-resistant facing layer. The decorative board provided by the invention is suitable for the mass production of boards with ultralarge faces. Compared with hollow glass of a curtain wall, the decorative board provided by the invention has equivalent light transmittance as well as the advantages of great veneer area, light weight, high strength, good impact resistance, sound and heat isolation, good decoration effect, capability of night illumination, easiness for maintenance, long service life, and the like and can meet the demands of curtain walls, enclosures and decoration engineering of buildings and large-scale landscape structures for light-transmission-type decorative boards with ultra-large areas.

The embodiment of the invention discloses a vehicle-mounted terminal system and a synchronous data acquisition method and device. In the system, an image sensor, a positioning sensor and a radar sensor acquire data according to associated moments; The first processor, the second processor and the third processor are used for respectively acquiring data acquired by a sensor connected with the firstprocessor, the second processor and the third processor, respectively determining timestamps of the acquired data, and respectively sending the acquired data and the corresponding timestamps to the main controller; The method comprises the following steps of: acquiring data by each sensor according to mutually associated moments; wherein the main controller or the second processor, using the first processor and the third processor as to-be-time-service equipment, and adjusting the system time of the to-be-time-service equipment according to the interaction information with the time service equipment on the basis of a precision time protocol (PTP), so that the clock of the to-be-time-service equipment is synchronous with the clock of the time service equipment; and enabling the main controller or the second processor to determine whether the main controller or the second processor is time service equipment according to a preset signal of the positioning sensor. By applying the scheme provided by the embodiment of the invention, the data with higher time synchronization precision of each sensor can be obtained.

The invention provides a data interaction system with a plurality of external interfaces, which comprises a plurality of external main control end modules, a plurality of external interface modules and interface conversion modules, wherein the external main control end modules correspond to the external interface module, command words and data are predefined according to an interaction protocol with an internal bus and are transmitted through the external interface modules, the external interface modules are respectively used for transmitting the corresponding command words and the data to the interface conversion modules, and the interface conversion modules analyze and convert the command words and the data according to the data interaction protocol for executing the data interaction with the internal bus. The invention can improve the consistency and the importance of the interactive design of the external interfaces and the internal data.

A system and method for replicating a multithreaded application program using a semi-active or passive replication strategy, wherein the application program executes under the control of an operating system having a thread library. The method comprises piggybacking mutex ordering information at the Primary replica onto regular multicast messages specifying the order in which threads in the Primary replica have been granted their claims to mutexes; and receiving the multicast messages at a Backup replica containing the mutex ordering information which determines the order in which threads in the Backup replica are granted mutexes. Thread library interpositioning is preferably utilized to intercept calls to functions in the operating system's thread library, so that the system and method of the invention may be implemented transparently. The invention enforces strong replica consistency without the need to count instructions, add significant messaging overhead, or modify application code.

The invention discloses a portable precision conductive slip ring detection system and method. The portable precision conductive slip ring detection system is composed of a multi-loop precision conductive slip ring, a slip ring testing mechanism, a line concentration device, a parameter testing device, a motor driver, a relay switch control unit, a torque sensor control electricity box, an upper computer and a plurality of wires. The multi-loop precision conductive slip ring is installed in the slip ring testing mechanism, ring / brush leading wires are connected with the line concentration device respectively, the upper computer is connected and communicated with the parameter testing device, the torque sensor control electricity box, the relay switch control unit and the motor driver through an RS-232 / RS-485 serial port line, collecting, analyzing and processing, displaying and saving of contact resistance, withstand voltage leakage current, insulation resistance and rotating torque data are achieved at the same time, and detection on the relevant parameters is further achieved. The portable precision conductive slip ring detection system and method have the advantages that the volume is small, the weight is small, portability and adaptability are high, cost performance is high, and development and later maintaining are easy, and the portable precision conductive slip ring detection system and method are quite suitable for small and medium enterprises.

The invention provides an objective evaluation method for the quality of a three-dimensional image based on improved structural similarity, which comprises the steps of firstly establishing a method for calculating the mean structural similarity of a certain distortion image; calculating a frequency domain structural similarity index; calculating a texture information coefficient; weighting an image region by using a spatial position factor; considering an image central region in which the human eyes are interested, and calculating a spatial position influence coefficient; integrating the texture information coefficient and the spatial position influence coefficient into a comprehensive weighting coefficient according to a formula provided in the description, carrying out weighted averaging on the frequency domain structural similarity index of each image block by using the coefficient, and calculating the average structural similarity; and calculating the average structural similarity of a left viewpoint and the average structural similarity of a right viewpoint of the three-dimensional image according to method established by the steps for calculating the average structural similarity of the distortion image, and acquiring a quality evaluation index of the three-dimensional image. The objective evaluation method provided by the invention can make overall and accurate comprehensive evaluation for the quality of the three-dimensional image.

The invention relates to an anti-clamp circuit of an electric skylight. The common electric skylight is easy to heart passengers, and has serious safety hazard. A small part of skylight with the anti-clamp function has simple anti-clamp circuit, and has the problems of low precision, large error and the like. The invention comprises a microcontroller, a motor driving circuit, a LIN driving circuit, a signal sampling circuit, a power supply circuit, a position sensing circuit, a press key circuit, a status indicating circuit, a debugging interface circuit and a data storage circuit. The motor driving circuit is connected with a signal at the signal end of the microcontroller, and the LIN driving circuit is connected with a serial communication port of the microcontroller through signals. The signal sampling circuit is connected with an analog and digital sampling port of the microcontroller through signals. The position sensing circuit is connected with a position I / O port of the microcontroller through signals. The storage circuit is connected with a storage I / O port of the microcontroller through signals. The invention has the advantages of high anti-clamp precision, small error, strong uniformity and low cost.

The invention discloses a detection control method for accelerator mistakenly stepping of a passenger vehicle. The detection control method comprises the following steps that S1, a vehicle state signal is acquired; S2, whether the vehicle is in a static or low-speed state or not is judged, if yes, step 3 is executed, and otherwise, step 8 is executed; S3, whether the release time of a brake pedalis less than a time threshold value or not is judged, if yes, step 4 is executed, and otherwise, step 8 is executed; S4, whether the accelerator pedal change rate exceeds an accelerator pedal change rate threshold value and whether the depth of the accelerator pedal is larger than an accelerator pedal depth threshold value or not are judged, and if yes, step 5 is executed, and otherwise, step 8 isexecuted; S5, the accelerator is mistakenly stepped, and an accelerator pedal mistakenly stepping control preventing mode is entered; S6, whether the accelerator pedal is released and the brake pedalis stepped down or not is judged, if yes, step 5 is returned and executed, and otherwise, step 8 is executed; S7, the accelerator pedal mistakenly stepping control preventing mode is stopped; and S8,the passenger vehicle normally runs. According to the detection control method, the accelerator mistakenly stepping behavior can be accurately detected under a low-speed entering and exiting drivingscene, and the response of a power system is properly controlled.

The invention discloses an interconnection detection cloud platform facing electric vehicle charging facilities. The platform is used for a charging facility network access detection, engineering acceptance detection, a business expansion operation detection, a transportation and maintenance detection, compatibility and consistency tests of charging facilities and an electric vehicle and the like;the cloud platform is composed of a detection management center, a knowledge expert database, a data analysis center and a service data interface, and are used for providing support of a detection standard, equipment state analysis, fault analysis and the like for on-site detection personnel, and providing technical support for an industry management equipment platform account, an electric vehicle characteristic library, a charging equipment detection library, a charging equipment fault library, a detection method and the detection standard, and providing professional charging facility detection statistic analysis reports for the national power grid, the government, charging operators and suppliers, and providing a device fault detection report and a diagnosis report interface for the charging operators.

The invention discloses a method for switching a leader node of a raft distributed system, a device and a system. The distributed system comprises a leader node and a standby leader node, and the leader node is used for executing a write operation or a read operation of the distributed system and sending a write operation or read operation log to the standby leader node. The method comprises the following steps: keeping persistence consistency with the log of the leader node by the standby leader node; and when the leader node is faulty, switching the standby leader node as the leader node. The technical scheme provided by the invention has the advantages of improving the service performance of the distributed system.

The invention discloses a micro-channel plate type photomultiplier tube with high quantum efficiency and a preparation method thereof, and a dual-alkali photocathode and a preparation method thereof.Obtained dual-alkali photocathodes are sequentially stacked on the substrate in a multi-layer alkali antimonide manner; and the components of the alkali antimonide change based on a rule that antimonyelements decrease gradually and alkali metal increases gradually in a direction from the substrate of the dual-alkali photocathode to the outer surface. Therefore, the obtained stable dual-alkali photocathode structure has high repeatability; and a self-built electric field is formed inside the dual-alkali photocathode, so that electrons are excited in vacuum and thus the obtained micro-channel plate type photomultiplier tube has the high quantum efficiency.

The invention belongs to the technical field of cold storage and refrigeration, and particularly relates to a time-temperature indicator and a preparation method thereof. The time-temperature indictor comprises an indicator fixing plate and a sealing thin film, wherein a fixing clamping slot is formed in the other end of the indicator fixing plate, the end part of one end of the fixing clamping slot is close to a thin film liquid storage bag, a diffusion medium belt matched with the fixing clamping slot in length is fixed in the fixing clamping slot, a thorn sheet is embedded in one end, close to the thin film liquid storage bag, of the diffusion medium belt, and scale marks are marked on the front side of the indicator fixing plate. The time-temperature indicator can reflect the change of the quality of a frozen food and indicate the remaining shelf life of the frozen food, and the critical temperature is freely regulated within the scope of 0-12 DEG C, so that the scope of application of the indicator is greatly expanded.

The invention belongs to the field of preparation of a lithium ion battery, and particularly relates to a lithium ion battery with high energy density. The lithium ion battery comprises a ternary positive electrode material, a hard carbon composite negative pole plate, a ceramic separator and a functional electrolyte, wherein the preparation method of the hard carbon composite negative pole plate comprises the steps of depositing a lithium salt on a surface of a hard carbon electrode, preparing a hard carbon / lithium salt composite pole plate, coating a surface of the hard carbon / lithium salt composite pole plate with an organic polymer, and preparing a hard carbon composite pole plate containing the lithium salt and the polymer coating layer. Lithium supplementary is performed on the surface of the hard carbon pole plate by an electrochemical method, the initial efficiency of hard carbon can be substantially improved, the transmission quantity of lithium ions during the charge-discharge process is increased, and the rate performance of the lithium ion battery is improved; and meanwhile, a shell is coated with a special polymer material, the lithium salt on a surface of the material is prevented from being in contact with outside air, and the processability and the safety of the material are improved.

The invention discloses a battery charging and discharging management system and belongs to the technical field of storage battery charging and discharging. The battery charging and discharging management system comprises a plurality of batteries inside a battery pack and is characterized by comprising a power supply module, a battery pack parameter collection module and a battery pack single balancing module; the power supply module which is connected with the battery pack parameter collection module and provides power for the battery pack parameter collection module; the battery pack single balancing module is simultaneously connected with the batteries inside the battery pack; the battery pack parameter collection module is connected with the battery pack single balancing module. According to the battery charging and discharging management system, parameters of the battery pack can be collected in real time, balanced charging and discharging of the single battery inside the battery pack is achieved, and the service life of the batteries is effectively prolonged, deep discharging, over discharge of the single batteries, high temperature during the charging process and unbalanced charging are avoided, working states of the batteries can be interrupted in time during abnormal accidents, and personal safety can be guaranteed.

The invention provides a method for estimating film thickness based on an even function seismic response. The method comprises the steps of carrying out 90-degree phase shifting on a zero-phase odd function seismic response to form the even function seismic response, carrying out matching pursuit time-frequency analysis on the even function seismic response to obtain a peak amplitude and peak frequency, and estimating the film thickness through the combination of the peak amplitude and peak frequency. A device with the method used comprises a preprocessing module used for carrying out 90-degree phase shifting on the zero-phase odd function seismic response to form the even function seismic response, a matching pursuit time-frequency analysis module used for carrying out analysis on the even function seismic response to obtain the peak amplitude and peak frequency, and a film thickness obtaining module used for estimating the film thickness through the combination of the peak amplitude and peak frequency. According to the method and device for estimating the film thickness based on the even function seismic response, the equivalence between 90-degree phase shifting and film odd-even relation conversion is verified, the advantage of an even function on film thickness estimation is determined, and prediction of the film thickness is facilitated through the combination of the peak amplitude and peak frequency.

The invention relates to a distributed memory database data synchronization method. The method comprises the steps of receiving a transaction submitting request, and recording a redo log according tothe transaction submitting request through a main library; sending the redo log to a host where a standby library is located through a synchronous mode; updating data of the main library of the distributed memory database; receiving confirmation information of the completion of the redo log receiving fed back by the host where the standby library is located through the synchronous mode; generatinga prompt message of completion of the transaction according to the confirmation information, and sending the prompt message to a client; sending the redo log to the host where the standby library islocated by a copy module of the host where the main library is located through an asynchronous mode; loading the redo log sent by the copy module of the host where the main library is located by the standby library, and completing the data update. The method combines the synchronous mode and the asynchronous mode to achieve the situation that complete data of the main library is in the standby library, and achieves strong consistency between the main library and the standby library. The invention further provides a distributed memory database data synchronization system.

The present invention belongs to the field of screw display technology. The preparation process of plasticized fexible high-brightness nano projection display screen material uses main material, plastcizer, nano powder brightnessing agent and initiator as material and includes mixing the main material and nano powder, adding brightneing agent and initiator at certain temperature for polymerization, filling the initiated polymerizing material into some mold, fast heating for violent polymerization, cooling in the reactor and demolding. The projection display screen material is flexible and windable and has high brightness, high resolution, high color fidelity and many other advantages and thus wide application foreground.

The invention provides a method of using extremely low frequency marine electromagnetic method to conduct marine oil and gas resources exploration. The method of using the extremely low frequency marine electromagnetic method to conduct the marine oil and gas resources exploration includes building an extremely low frequency launcher and a transmitting antenna, arranging a seafloor data collection station in a decided detected sea area, receiving signals of extremely low frequency electromagnetic signals after being reflected by seafloor mediums by using a seafloor electromagnetic signal collection station, figuring apparent resistivity and phases of the seafloor mediums according to the received electromagnetic signals, and getting construction conditions of seafloor oil and gas resources through inversion and geological interpretation. Compared with the marine magnetotelluric method, the method of using the extremely low frequency marine electromagnetic method to conduct the marine oil and gas resources exploration is high in measuring accuracy of electromagnetic signals and improves exploration accuracy. Compared with an existing marine artificial source electromagnetic method, the method of using the extremely low frequency marine electromagnetic method to conduct the marine oil and gas resources exploration saves a built-in emission source and reduces construction difficulties and saves construction cost. The method of using the extremely low frequency marine electromagnetic method to conduct the marine oil and gas resources exploration is an exploration method which combines advantages of the marine magnetotelluric method and advantages of the marine artificial source electromagnetic method.

The invention discloses a digital-analog hybrid adaptive interference cancellation device comprising an analog vector modulator and a digital correlation controller. The analog vector modulator includes a transmitting directional coupler, a quadrature power divider, an I-way directional coupler, an I-way electrically switched attenuator, a Q-way directional coupler, a Q-way electrically switched attenuator, a first power combiner, a second power combiner, and an error directional coupler. The digital correlation controller comprises three same ADC sampling channels, two identical DAC output channels, a digital processing core FPGA, and a data processing core FPGA running a digital control algorithm. The analog vector modulator is realized by an analog device, which does not involve the amplification of power signals and has characteristics of low noise and low distortion. The digital correlation controller makes full use of the programmable and insensitive characteristics of digital devices, and has the advantages of simple debugging and upgrading, high environmental adaptability, high device parameter consistency, high loop gain adjustable upper limit, and easy multi-channel integration.

The invention provides a data processing method and system, computer equipment and a storage medium, and the method comprises the steps that a main node in a Dedger cluster processes a writing requestafter receiving the writing request transmitted by a client, and obtains log data; the master node broadcasts the log data to all slave nodes in the cluster; and the master node feeds back the user side according to the storage condition of the log data by the slave node. The distributed message storage multi-copy mechanism can be realized based on the raft algorithm, and the advantages of strongconsistency, high reliability, high availability and the like of message storage can be well realized.

The invention discloses a method for enhancing system safety, a checking device and a safety system. The method for enhancing the system safety comprises acquiring parameters of a program logic part in a system operating process, checking the the program logic part according to the parameters of the program logic part, normally operating a system if checking is passed and directly resetting the system if the checking is not passed. The invention further discloses the corresponding checking device and the safety system. Through the mode, the method for enhancing the system safety, the checking device and the safety system can effectively improve the system safety through an active type defending strategy.

The invention discloses a system deployed in multiple computer rooms and a cross-computer-room business data processing method. The system comprises a main computer room and a standby computer room, wherein the main computer room comprises at least one business server, and a main cache database and a main database used for storing business data, the standby computer room comprises at least one business server, and a standby cache database and a standby database used for storing the business data; the business data are synchronized bidirectionally between the main cache database and the standby cache database, the business data are synchronized bidirectionally between the main database and the standby database; the at least one business server of the standby computer room is used for reading the business data from the main database when receiving a business data reading request, and writing the business data into the main database when receiving a business data writing request. In the system, when the business data are synchronized bidirectionally between the main database and the standby database, the business data of the main database are taken as principal, so that the data of the standby database and those of the main database can keep high consistency.

This invention puts forward an accurate marketing system and a method based on singaling analysis including an accurate marketing target, an accurate marketing platform, a BOSS system and a remote operation control terminal, and the platform is composed of an accurate marketing process unit and a signaling collection device, in which, the signaling collection device collects signaling to the accurate marketing target and transmits it to the process unit, which analyzes and translates it to behavior character, namely, dynamic behavior data, the platform matches the dynamic behavior data and static behavior data to judge if it sends sales promotion information to the target or registers it as a target user.

The invention relates to a distributed data storage method and system, computer equipment and a storage medium. The method comprises the steps of obtaining a data writing request sent by a terminal, wherein the data writing request carries to-be-stored data; sending the data writing request to a main storage cluster for consistency verification; after the consistency verification is passed, synchronously storing the to-be-stored data to each main storage server in the main storage cluster; after the to-be-stored data is successfully written into each main storage server in the main storage cluster, generating a data synchronization instruction by utilizing the to-be-stored data; and sending the data synchronization instruction to the slave storage cluster, and asynchronously storing the to-be-stored data to each slave storage server in the slave storage cluster according to the data synchronization instruction. By adopting the method, the data storage efficiency can be effectively improved, and the data consistency can be kept.