1851results about How to "Little impact on performance" patented technology

The invention discloses a firewall system, a safety service platform and a firewall system management method. The firewall system includes a message detection module, a VPN module, a collocation module, an application proxy module, a log module, a heartbeat module and a message redirection module. The safety service platform includes a message detection module, an application proxy module, an anti-virus module, an incursion detection module, a content filtering module, a VPN module, a strategy management module, an event management module, a terminal safety module, an asset management module, a loophole scanning module, a PKI management module and a report module. The management method comprises a registration step, a running log management step, a redirection message management step, and an internal network management step. The invention provides a new firewall system, which not only has the message detection function of a thin firewall system, but also has the VPN function of a fat firewall system, entrusts other safety functions to the safety service platform and receives the management and control of the safety service platform.

The invention provides a water-based drilling fluid composition containing an amine compound, which comprises the following components: a 0.5 to 5 weight percent of water-based amine compound as shown in formula I: RHN-Y-[OY']X-NHR', wherein Y, Y',x, R and R' are as defined in a manual; 0.1 to 1.0 weight percent of water-based tackifier which is selected from one or more types of xanthan gum, acrylamide-acrylic copolymer and hydroxyl ethyl cellulose; 0.5 to 5 weight percent of water-based fluid loss agent which is selected from one or more types of modified lignite, acrylic polymer, modified starch and modified cellulose; 2 to 12 weight percent of water-based inhibitor which is selected from one or more types of potassium chloride, potassium sulfate, formic acid, formic acid sodium, potassium chloride and epoxypropyltrimethylammonium chloride; and the composition can also further comprises coating agent, weighting agent, lubricant, borehole stabilizer and the like. The water-based drilling fluid composition has good inhibiting performance to clay shale drilling cuttings.

The invention discloses a method for detecting the error of a program control flow and intends to overcome the difficulties in increasing the detection rate of the errors of the control flow by the conventional method and solve the difficult problem with the detection of the control flow inside basic blocks and among processes. The method comprises the following steps according to the technical scheme of the invention: firstly, identifying basic blocks and confirming the routing relation among the basic blocks; then, confirming the maximum required number of detection commands of the internal control flow of each basic block according to the requirements of the internal control flow and the constitutive characteristics of the basic blocks; designing the labels for the basic blocks on that basis, and distributing the unique static label to each basic block; then, inserting the detection commands into the head part, inner part and tail part of each basic block in the program respectively, re-assembling and re-linking the assembler of the inserted detection commands of the control flow, and generating an executable program for achieving the detection of the error of the control flow.

The invention discloses multichannel radar amplitude and phase automatic correcting method and device. The method comprises the following steps of: before a radar system works, respectively feeding the same radio frequency test signal into various receiving channels of a multichannel radar system by a feed source to obtain the phase characteristic and the amplitude characteristic of various receiving channels; calculating a phase difference and an amplitude specific value between other channel signals and a reference signal by using one of channel signals as a reference signal; and then enabling the radar system to work, carrying out automatic correction on target echoes of all the channels by utilizing the obtained phase difference and the amplitude specific value so as to ensure the consistency of all the channels on amplitudes and phases. When a transmission frequency point is changed or a radar working environment is changed, the amplitude and phase characteristics of the receiving channels are unavoidably changed; and the invention can accurately and conveniently measure and correct the change of the amplitude and phase characteristic and ensure the consistency of all the channels, thereby expanding the working frequency range and the environmental adaptability of radar and improving the maintainability of the radar.

The invention relates to a fine anti-interference tracking controller of a flexible hypersonic vehicle. A method for constructing the fine anti-interference tracking controller comprises the following steps of: (1) building a longitudinal model of the flexible hypersonic vehicle; (2) building a multisource interference system model of the flexible hypersonic vehicle based on the longitudinal model in the step (1): firstly, building a control-oriented nominal model; then regarding an elastic mode as interference and building an elastic mode interference model; and finally, building a multisource interference system model by combining the above two models and considering measurement errors, parameter uncertainty, external interference, etc.; (3) designing a nonlinear disturbance observer to estimate the elastic mode interference based on the multisource interference system model in the step (2); and (4) constructing the fine anti-interference dynamic reverse composite tracking controller based on the nonlinear disturbance observer in the step (3). The fine anti-interference tracking controller has the advantages of high anti-interference performance, rapid tracking speed, high control accuracy, etc., and applies to high accuracy tracking control of the height and the speed of the flexible hypersonic vehicle.

The invention relates to a gelation-delayed in-situ polymerized water shutoff gel for high-temperature reservoirs, which consists of 5 to 7 percent by weight of main agent, 1 to 2 percent by weight of solubilizer, 1 to 2 percent by weight of cross-linking agent, 0.1 to 0.8 percent by weight of initiator and the balance of water, the main agent consists of monomer A and monomer B, the mass ratio of the monomer A to the monomer B is 3:1 to 5:1, the monomer A is acrylamide, and the monomer B is ester. Under high temperature, the pumping time of the gel is relatively longer, the gelation time canbe controlled at 20 to 72 hours under 120 DEG C, the final set strength can reach visual observation code level I, the synaeresis of the gel does not take place in 90 days, and the gel can be used inwater shutoff operation for high-temperature reservoirs under 90 DEG C to 140 DEG C. Because the gel has the advantages of good pumping property, high plugging strength, long service life, simple construction process and the like, the gel has a broad application prospect in chemical profile modification and water shutoff for oil fields.

The invention provides a log management method and device in a distributed environment. The log management method in the distributed environment comprises the steps of intercepting and collecting log data, sending the log data, receiving the log data, carrying out analysis and handling on the centralized log data, storing the handled log data in a database, and providing the log data for a user so that the user can carry out query and statistics. When the log management method and device in the distributed environment are used, logs which are arranged at various physical storage positions in a scattered mode can be collected to a centralized log center in real time, log records in log files can be sequenced according to a unified time line sequence, and can be structurally stored, and the better functions of log query, log analysis and log statistics are provided. According to the log management method and device in the distributed environment, various problems, caused by inconformity of the time and the space of logs generated by applications when distribution, clustering and deployment are carried out, in the process of log utilization are solved, and query and statistics of the user are facilitated.

The invention discloses a data disaster backup control system which comprises a data loss identifying device, a main and standby switching executing device, an archive log file application device, a log disc switching device and an online log file application device, wherein the data loss identifying device is in charge of inquiring a data state of a standby database to check whether data loss exists and calling the main and standby switching executing device if the data loss does not exist; the main and standby switching executing device is used for starting the standby database and confirming that the state of the standby database is available; the archive log file application device is in charge of applying an archive log file in a log file disc and an archive log file in a log file copying disc to the standby database; the log disc switching device is in charge of deleting the log file disc from a server in which the standby database is set, controlling a control disc controller to add the log file copying disc to the server in which the standby database is set and enabling the standby database to access the log files in the disc; and the online log file application device is called by a control engine device and is in charge of applying an online log file from the log file copying disc to the standby database.

The invention provides a bearing-type damage biomechanic three-point bending test device. The bearing-type damage biomechanic three-point bending test device is characterized by comprising a base (1), a support base (2), support bearings (3), support shafts (4), a pressing head (5), a sensor (6), a connecting plate (7), a travel switch (8), a baffle (9), a baffle fixing screw (10), a support base fixing screw (11) and a dividing rule (12). The bearing-type damage biomechanic three-point bending test device provided by the invention has the advantages that a pair of support shafts and the support bearings can support a biological sample, the rolling friction is formed among the support shafts and the support base, the biological sample free bending constraint caused by the friction in a test process is reduced, the transformation of the biological sample on a supporting position is relieved, more accurate test data can be obtained, and a terminal condition more easily set in a finite element model so as to perform material parameter reverse engineering.

The inveniton provides a hydrophilic modification method for a polytetrafluoroethylene membrane. The method comprises the following steps: step 1, subjecting the polytetrafluoroethylene membrane to plasma treatment under a nitrogen atmosphere, and allowing the surface of the polytetrafluoroethylene membrane to generate relatively-stable free radicals and active sites; step 2, placing the polytetrafluoroethylene membrane into an acylic acid solution and carrying out static impregnation for a period of time, then taking the polytetrafluoroethylene membrane out of the solution and then placing the polytetrafluoroethylene membrane between two glase plates, and carrying out thermochemical polymerization in a vacuum drying oven so as to obtain the polytetrafluoroethylene membrane with the surface grafted with polyacrylic acid; and step 3, subjecting the polytetrafluoroethylene membrane to static impregnation in a titanium dioxide sol for a period of time, and allowing titanium dioxide to be assembled onto the surface of the polytetrafluoroethylene membrane through the coordination effect of metal titanium-ion Ti4+ and a carboxyl group on the polyacrylic acid so as to obtain a hydrophilic modified polytetrafluoroethylene membrane. The hydrophilic modified polytetrafluoroethylene membrane prepared by using the method in the invention retains excellent properties of a conventional polytetrafluoroethylene membrane and greatly improves filter performance, hydrophilic property, pollution resistant property and photocatalytic property of the polytetrafluoroethylene membrane.

The invention relates to the method to produce clean oil by coal tar, especially the hydrocracking technology of the coal tar. The characteristic of the invention includes: after removing the mechanical impurities and water, the coal tar enters the hydrogenation refining reactor to hydrogenate, remove the metal, remove sulphur, remove nitrogen and remove oxygen to get the refined oil; the refined oil enters the fractionator to separate the heavy magnesium carbonate distillate and the light magnesium carbonate distillate; part of the heavy magnesium carbonate distillate enters the refining reactor and the other part enters the cracking reactor or all the heavy magnesium carbonate distillate enters the cracking reactor to get the hydrocracked oil; the hydrocracked oil enters the fractionator to be separated into light magnesium carbonate distillate and heavy magnesium carbonate distillate. Compared to the present technologies, the invention can broaden the source for clean oil producing and improve the quality of the coal tar products; besides, the catalyst in the invention has long service life and the device can operate steadily.

The invention discloses a method for synchronizing data of a database in an active / standby server, wherein the method comprises the following steps: establishing a transaction information acquisition list by a data acquisition unit in the active / standby server; forming a user transaction information record and backing up the record to the transaction information acquisition list through monitoring the database to write operation and intercept scattered service data by the data acquisition unit in the active server; synchronizing the user transaction information acquisition list with the standby service by a data synchronous replication unit in the active server; and transferring the synchronized user transaction information acquisition list by a data transferring unit in the active server. The method for synchronizing the data of the database provided by the invention utilizes the data acquisition unit, the data synchronous replication unit and the data transferring unit in an application layer to separate data acquisition and synchronization operations, reduces the performance influence on a database server and uses an newly added user transaction information record as a minimal synchronization unit to improve the integrality and reliability of the data synchronization.

The invention discloses a lightweight class privacy data encryption method and a system for an Android system and relates to the technical field of mobile communication devices. A to-be-protected sensitive file set is chosen in a file system, an encryption processing module and a decryption processing module are embedded into the Android system, and files in the sensitive file set are encrypted and stored so that a protected data base is generated. When an application program requests to visit the protected data base, a mirror of the protected data base of a plaintext can be obtained after the application program is verified by a secret key. The application program modifies the files in the protected data base by operating the plaintext mirror, and when the visit is over, the mirror is destroyed. The lightweight class privacy data encryption method and the system for the Android system aim at protecting the data base of a base layer of the system, a encryption function of the system can be used normally, a lightweight class encryption mechanism is added to the Android system to protect the privacy data files, and meanwhile system overhead is reduced.

The invention discloses a method for detecting consistency of data of MySQL master and slave servers. The method comprises the steps of setting default storage engines of the master and slave servers to be InnoDB; performing special database operation in the master sever, wherein the operation is to be written into a binlog file of the master server; determining whether the current database operation to be written into the binlog file is the special database operation by the master server while writing into the binlog file; if so, exporting the master server data; determining whether the currently-performed database operation is the special database operation while reading and implementing content of the binlog file written in the master server through a sever; if so, exporting the slave server; determining whether the exported master server data are the same as the exported master slave data; if so, determining that the exported master server data are consistent to the exported master slave data. The invention further provides a device for detecting consistency of data of the MySQL master and slave servers. With the adoption of the method and device, whether the consistency of the master and slave servers data can be accurately detected at a time.

An underwater short-distance high-speed wireless optical information transparent transmission device comprises a transmitting module and a receiving module, wherein the transmitting module sequentially comprises an LED modulation drive circuit, a blue-green mixed LED array, a transmitting light path, a beam expanding mirror and a homogenizing piece in the direction of an electrical signal to be transmitted, and the receiving module sequentially comprises a large-view-field receiving light path, a light filter, a Fresnel lens, a photoelectric detector and a photoelectric detection conditioning circuit. The underwater short-distance high-speed information transparent transmission problem can be solved, the lake, river and ocean environment application requirements are met, and the underwater short-distance high-speed wireless optical information transparent transmission device is especially suitable for connection of multiple sensors at deep position under the ocean, underwater data collection, ROV data interaction and continuous communication occasions for water surface platforms and underwater devices and has important significance in the ocean application field.

The invention discloses a data backup method for virtual machines. The method comprises the following steps of snapshooting data in a plurality of magnetic disks in one or more virtual machines to generate a snapshot file, and storing the generated snapshot file in a snapshot queue; complementarily snapshooting newly added data in each magnetic disk in a snapshooting process, and storing a generated complementary snapshot file in the snapshot queue until all the data in the magnetic disks is snapshot; when the snapshot file and the complementary snapshot file in the snapshot queue reach a threshold value, backing up the snapshot file and the complementary snapshot file in a target magnetic disk. According to the data backup method, the data is snapshot and complementarily snapshot, and the snapshot file and the complementary snapshot file are transferred when reaching the threshold value, so that the backup time of the virtual machines is shortened; moreover, the virtual machines continuously run in backup processes, so that influence on a physical server in the backup processes of the virtual machines is reduced, and the consistency of memory data of the virtual machines and the cache data of the magnetic disks is improved.

The invention discloses a system and method for trusted storage of data. The system mainly comprises four logical entities, namely, a trusted management center, an application server, a storage virtualization security gateway and a rear-end storage system. The trusted management center serves as a configuration and management entity for a trusted strategy. The application server serves as an entity sending a data access request. The storage virtualization security gateway serves as an entity receiving the data request of an application layer and achieving mapping of a virtual port, converting of a virtual storage device address and a physical storage device address and encapsulating of an IO request through the virtualization technology. The rear-end storage system provides a physical medium for data storage and operation. On the basis of the storage virtualization technology, a data access control flow in the trusted technology is provided for the storage virtualization security gateway or an agent layer so that strict security check and control can be carried out on an access request for a storage system, and illegal access or vicious data access operation can be prevented.

The invention provides a mapping method and device for an indication channel PHICH of a physical hybrid automatic repeat request to a physical sub-carrier, comprising a plurality of mapping steps of a frequency domain. The invention is characterized in that: a plurality of usable physical sub-carriers of an FDD system is evenly divided into four areas; the three resource groups of a PHICH are one-to-one correspondence with the three areas of the four areas. The invention has the advantages of ensured diversity gain of PHICH and simple realization and little influence on performance of other downlink physical channels.

The invention provides a continuous data protection method and a server. The method comprises the following steps of: receiving log data of a client by the server, storing the log data according to data blocks, when the current data block is full, directing the current data block to another data block with available storage space, and continuously writing at another data block; establishing and maintaining a first-level index according to the number of the data block; establishing and maintaining a second-level index according to time points of the log data in each data block; and searching the log data according to the first-level index and the second-level index when the data is restored. By the method, the log data can be reasonably managed and quick searching and data restoration can be realized.

The invention relates to an IP network application accelerating system for realizing the high-efficiency transmission of data in wide area networks. The interaction times among the wide area networks are reduced and the response time of an application server to a user is increased through optimizing four mainstream application protocols such as HTTP (Hyper Text Transport Protocol), FTP (File Transfer Protocol), SMTP (Simple Message Transfer Protocol) and POP3 (Post Office Protocol 3) in the aspects of object caching, directory prefetching, data authentication and the like; the retransmission of the same data in the networks is avoided through redundant data judgment, data combination and data recovery, and thereby, the effective use ratio of available bandwidth is improved, and simultaneously, the stability and the accuracy of redundant data processing are ensured through the storage management on a data redundancy caching zone; and the actual transmission rate of the data in the widearea networks is improved through dynamically measuring the network bandwidth and regulating the transmitting rate.

The invention belongs to the technical field of image information processing, and discloses a fire image recognition method based on depth learning. The method comprises the following steps: collecting smoke pictures and normal pictures in the early fire stage as a training set and a test set of a convolution neural network; Obtaining dark channel images of each image to compose a final training set and a test set; constructing Convolution neural model to determine whether smoke could be detected or not. Obtaining The smoke detection model by training the neural network, and testing the reddest pair model and evulating its performance. Compared with the prior art, the method of the invention improves the accuracy of smoke detection in a single image by utilizing dark channel images and depth learning, simultaneously improves the detection speed, and can be practically applied to the fire detection work of cities or forests.

The invention discloses a monitoring system based on a J2EE framework and a method. The data information of a WEB container, a JVM, an operation system, business resources and other components is monitored in a mode of combining plug-in connector deployment and file configuration, and data acquisition, monitoring and diagnosis are carried out on different layers of the whole system environment. The influence of monitoring on the performance of an application system is reduced to the lowest limit.

The application discloses a downlink communication method in a high speed railway system and a device thereof. The method comprises the following steps: a, as for each user equipment UE and network side which need to transmit business data at present in a cell, a RRU with the highest current uplink received signal strength is selected as the RRU used for business data transmission from all RRUs covering the UE; on the selected RRU, the business data which needs to be transmitted currently and a user dedicated reference signal DRS corresponding to the business data are sent to the user equipment; and on each RRU in the cell, control data which needs to be transmitted currently is respectively sent to each UE in the cell; and b, the UE respectively carries out frequency offset estimation and compensation and corresponding data detection processing on data received on a traffic channel and a control channel. By the method provided by the invention, the influence of Doppler frequency offset on distributed high speed railway system performance can be reduced effectively.

The invention provides a method and system for managing and processing metadata of storage equipment. The method comprises the following steps: one or more erase blocks form a superblock; the superblock retains a space for storing superblock-related metadata; the superblock-related metadata comprises a serial number distributed for the superblock and address mapping information in the superblock; the address mapping information stores a mapping relationship from a physical sector address to a logic sector address; when data is written into the superblock, the corresponding address mapping information of the data is also written into the superblock; when a system is recovered, a page table of the storage system is recovered according to the address mapping information of the superblock; the page table marks a mapping relationship from a logic sector address to a physical sector address. Due to the adoption of the technical scheme, the page table can be guaranteed to be completely recovered during startup and the storage equipment can be ensured to normally work when started.

The invention discloses a method for removing sulfur dioxide in fumes with the by-product of gypsum produced by white mud in the ammonia-soda factory. With such method adopted, the efficiency of removing the sulfur dioxide is more than 95 percent, the purity of the by-product of the gypsum is more than 85 percent, and the water content of the gypsum is less than 4 percent. The method is realized by the following technical proposal: white mud slurry is used as an absorbent for removing the sulfur dioxide; in the spray tower absorbing zone, the white mud slurry reacts with the sulfur dioxide to generate calcium sulfite and calcium bisulfite; the calcium sulfite and the calcium bisulfite are catalyzed and oxidized into calcium sulfate in the oxide crystallization pool; the calcium sulfate is crystallized into gypsum; and gypsum slurry is concentrated, washed and dehydrated, and dried, and then changed into the finished product of gypsum. The method for removing the sulfur dioxide in fumes, which uses waste to restrict waste, not only realizes clean production and circular economy in the ammonia-soda industry, but also provides a more economical sulfur dioxide removing method for surrounding power plants in the ammonia-soda industry, thereby realizing bidirectional treatment of the waste. Furthermore, the by-product of the gypsum has wide commercial prospect after dried.

The invention discloses a dynamic acquisition method of file system access record, belonging to the field of storage system testing and performance analysis. The invention is characterized in that a kernel module can be loaded without the need of unloading the old file system, thus not needing to interrupt the working application. A file system operation interception module can dynamically intercept the underlayer file system operation by a substitution of corresponding functions in the interception module. While executing the underlayer file system operation, the functions output the operation type and parameters to an access record output module which compresses the file record and outputs a plurality of operation information at one time in a output record way of register. The access record output module controls the output file size to prevent the problems of difficult read and write and exceeding file system restriction. An access record file management module collects additional information and packages and transfers the access record according to the assignment of users, thus being convenient for users to manage. The test shows that the collection of access record has little impact on the application.

The invention relates to a method for transient liquid phase diffusion bonding between TiNi shape memory alloy and stainless steel, which belongs to the technical field of the connection of dissimilar materials. In the prior art, the technology of the connection between TiNi shape memory alloy and stainless steel has the problems of welding crack, large crystal grains in the heat affected zone and poor mechanical properties. The transient liquid phase diffusion bonding between TiNi shape memory alloy and stainless steel is realized through the following steps: after the surfaces of TiNi shape memory alloy and stainless steel to be welded and the surface of AgCuTi foil is cleaned and dried, a TiNi shape memory alloy / AgCuTi metallic foil / stainless steel structure is formed, fixed through a welding clip, and then positioned in a vacuum diffusion oven, and welding pressure and temperature are applied to the structure. The method has the advantages that the welding temperature is low (relative to fusion welding), the influence to the base material is small, the connector has no welding defect, the shearing strength of the connector in the room temperature reaches 250 MPa, and the microhardness of the area near the seam section can reach 670 Hv.

The invention relates to a high impact resistant halogen-free flame retardant alloy of polycarbonate and acrylonitrile-butadiene-styrene resin and a method for preparing the same. The special material is prepared from the following components in mass percentage: 60 to 70 percent of PC resin, 20 to 23 percent of ABS resin, 5 to 10 percent of flame retardant, 1 to 3 percent of compatilizer, 0.5 percent of antioxidant, 0.5 percent of light stabilizer, and 0.5 percent of anti-dripping agent. The preparation method comprises the following steps: (1) stirring the PC resin and the flame retardant, the compatilizer, and the anti-dripping agent at a rotational speed of between 300 and 500 revolutions per minute for 5 minutes; (2) adding the ABS resin, the antioxidant, and the light stabilizer to the mixture and stirring the mixture at the rotational speed of between 400 and 500 revolutions per minute for 3 minutes, and then stirring the mixture at a rotational speed of between 700 and 800 revolutions per minute for 5 minutes to obtain a premix; and (3) extruding and granulating the premix in an extruder under vacuum condition to obtain the finished product. The high impact resistant halogen-free flame retardant alloy not only has good flame retardant property, but also has good mechanical property, in particular quite high notched impact performance, thus the alloy can be applied to the fields of electron and electricity, automobile, medical equipment, machinery and the like.

The invention provides a method and a system for backup storage in an optical network. The optical network comprises a data allocating device, a main memory array and a standby memory array, wherein the standby memory is pre-established with a logic unit number identification (LUN ID) corresponding relation between the main memory array and the standby memory array; the standby memory array receives data frames which are copied by the data allocating device and is written into the main memory array; and the LUN ID written into the main memory array of the data frames is acquired, and the data frames are written on storage resources marked by the LUN ID of the standby memory array corresponding to the acquired LUN ID according to the corresponding relation. The method and the system can save the resources of a host computer and reduce the influence on the performance of the host computer caused by the backup storage.

The invention relates to a rotary speed adaptive robust control system and method for an ultra-high-speed permanent magnet synchronous motor. The method comprises the steps of determining a motor rotary speed estimated value and a motor rotary speed error value by adopting a sensorless rotary speed estimation algorithm; determining a corresponding control amount by adopting an adaptive robust rotary speed control algorithm; determining a stator flux, a torque feedback value, flux error and torque error through motor three-phase current and three-phase voltage; performing voltage vector selection to obtain a basic voltage control signal; determining rotor position information through the sensorless rotary speed estimation algorithm; obtaining a three-phase compensation voltage by adopting a dead region compensation algorithm; combining the basic voltage control signal output by a voltage vector selection module with the three-phase compensation voltage, and performing PWM control on the motor; and repeatedly carrying out the steps until the motor rotary speed achieves the index. According to the rotary speed adaptive robust control method, the rotary speed estimation algorithm, the adaptive robust speed control algorithm, and the dead region compensation algorithm are adopted, so that the rapid, stable and reliable rotary speed control of the ultra-high-speed permanent magnet synchronous motor is effectively realized.