10679results about How to "Guaranteed continuity" patented technology

The invention discloses a distributed type dynamic cache expanding method and system supporting load balancing, which belong to the technical field of software. The method comprises steps of: 1) monitoring respective resource utilization rate at regular intervals by each cache server; 2) calculating respective weighing load value Li according to the current monitored resource utilization rate, and sending the weighting load value Li to a cache clustering manager by each cache server; 3) calculating current average load value of a distributed cache system by the cache clustering manager according to the weighting load value Li, and executing expansion operation when the current average load value is higher than a threshold thremax; and executing shrink operation when the current average load value is lower than a set threshold thremin. The system comprises the cache servers, a cache client side and the cache clustering manager, wherein the cache servers are connected with the cache client side and the cache clustering manager through the network. The invention ensures the uniform distribution of the network flow among the cache nodes, optimizes the utilization rate of system resources, and solves the problems of ensuring data consistency and continuous availability of services.

A method and system for providing a broadcast / multicast (BCAST) service, are provided. The method includes obtaining, by the terminal, at least one BCAST service from a visiting network when the terminal roams in the visiting network.

The invention discloses a disaster tolerance system and a disaster tolerance method thereof. The method comprises the following steps: (1) a data backup management unit carries out local backup on data of a current production site, records the sequence of the backup data and tests the reliability thereof; (2) a remote store-and-forward management unit carries out remote replication and storage on the backup data; (3) the remote store-and-forward management unit tests the reliability of the backup data, maps the backup data into a date storage management unit to be stored after success, and simultaneously transmits the backup data into each standby production site; and (4) when the production site suffers catastrophic failures, the disaster tolerance management unit starts the standby production site, and carries out the fast recovery of data. The disaster tolerance system of the invention adopts a distributed disaster tolerance system structure: network service system disaster tolerance and network storage system disaster tolerance, and integrates a network security mechanism with a network disaster tolerance mechanism; and the entire system has strong system protection and disaster tolerance capability, and improves the service quality thereof.

The invention discloses an industrial control network security protection method and an industrial control network security protection system. The method comprises the following steps that: aiming at an external network attack, a front host performs first layer data filter and access control on external network data; a security control host caches data through a common storage region, performs intrusion detection on the data, timely alarms illegal data and informs hosts on two sides; a rear host performs deep filter and access control on the data and causes the legal data to enter an internal network; aiming at an internal network attack, the rear host performs the first data filter and access control on internal network data; the security control host caches the data through the common storage region, performs the intrusion detection on the data, timely alarms the illegal data and informs the hosts on the two sides; and the front host performs the deep filter and access control on the data and causes the legal data to enter an external network. By the method and the system, the network security level of an industrial control system is increased, and the cost on investment, system transformation and management is reduced.

The invention relates to a multi-sensor autonomous navigation method for the low-orbiting satellite with fault-tolerance function and based on federated UKF algorithm, belonging to satellite autonomous navigation method. The method comprises the following steps of: constructing an orbital dynamics equation of earth satellite in a rectangular coordinate system; constructing a subsystem measurement equation with the output values of a star sensor and an infrared earth sensor as measurement quantities; constructing a subsystem measurement equation with the output values of magnetometer and a radar altimeter as measurement quantities; constructing a subsystem measurement equation with the output value of an ultraviolet sensor as measurement quantity; selecting a Sigma sampling point; constructing a predictive equation and an update equation of discrete UKF algorithm; respectively and independently performing Sigma sampling point calculation of each subsystem, and performing predictive update and measurement update; determining whether the output of each sub-filter is valid according to the predicted filter residual, isolating in case of malfunction, otherwise, inputting the filter result to a main filter for information fusion; constructing a non-reset federated UKF filter equation based on the UKF algorithm; and outputting earth satellite state estimated value X and variance matrix P thereof according to the steps.

The invention discloses an automatic assembly production line of buzzers, which comprises a feeding mechanism, a glue coating mechanism, a buzzer piece placing mechanism, a straight contact pin placing mechanism, a first thermoplastic pipe placing mechanism, an inclined contact pin placing mechanism, a second thermoplastic pipe placing mechanism, a thermoplastic pipe heat sealing mechanism, a contact pin welding mechanism, a dispensing mechanism, a curing mechanism and a detecting and sorting mechanism, which are sequentially arranged on a work table; the glue coating mechanism comprises an automatic shell locating mechanism located behind a glue applicator, and the automatic shell locating mechanism comprises a motor, a rotating jig, an optical fiber sensor, a motor base, a supporting plate and a sensor bracket; the optical fiber sensor is a reflective optical fiber sensor and is arranged to be aligned to the shell; and the optical fiber sensor is installed on the upper part of the sensor bracket, and the lower part of the optical fiber sensor is fixed to the side plate of the supporting plate. The automatic assembly production line disclosed by the invention has the advantages of smart design and simple structure, realizes high level automation, replaces the manual operation, reduces the cost of manpower and physical resources and improves the production efficiency of the assembly line.

The utility model discloses a creating and using method of a video streaming media bookmark. A bookmark table is created for each video streaming media file by a media player; the number of the bookmark items is not limited in the bookmark table; each bookmark item is linked to a certain segment of the video streaming media file; the bookmark here can be an independent electronic file related to a certain video program, or the bookmark can integrate a data table of the video program file; the types of the bookmark here can be divided into the system bookmark and the user bookmark; when the audience watch the video programs, the video bookmark provided by the utility model enables the audience to comment on the appreciated video program, deeply comprehend the content of the video program and mark the valuable or wonderful program segment in time; in addition, the video program if interrupted during playback can be resumed later by a book box at any time in order to keep the continuity of the play of the program without searching the last interruption area of the play manually by the audience.

The invention relates to a discrete keyboard layout system used in a touch screen of a portable electronic device. The system comprises a left master keyboard area, a right master keyboard area and an additional function area, wherein the additional function area is arranged between the left master keyboard area and the right master keyboard area. The invention also relates to a method for carrying out keyboard layout switching setting and dynamic zooming on the discrete keyboard layout system, an electronic device system for implementing the discrete keyboard layout system, and a method for implementing the setting control of discrete keyboard layout switching based on the electronic device system. By using the discrete keyboard layout system and setting method, corresponding portable electronic device and control method disclosed by the invention, the keyboard position layout function can be changed flexibly so as to accord with the human engineering, thereby obviously reducing the operating complexity of a user and solving the continuity problem of overall error correction of an area of a keyboard; meanwhile, an interface is friendly, the implementation procedure is simple, the application is flexible and efficient, the performance is stable and reliable, and the application range is wide.

A virtual machine thermal migration system comprises a management node, a source server, a target server, a PCIE switchboard and an SR-IOV network card, wherein the source server comprises a VM before thermal migration; the target server comprises a VM after the thermal migration; the source server, the target server, the management node and the SR-IOV network card are connected to physical ports of the PCIE switchboard respectively for communication; the management node is used for configuring the connection relationship of a VF module used by the VM before the thermal migration and the source server to a connection relationship between the VF module and the target server through the PCIE switch board; and the target server used the VF module to complete the thermal migration of a virtual machine through the PCIE switchboard and according to the connection relationship with the VF module configured according to the management node. By switching the abovementioned relationship, data packages are prevented from being lost during reception and transmission, and continuity of network service is ensured.

This invention relates to one visual frequency stable method based on property matching in the computer image visual frequency process technique field, which comprises the following steps: finding out each frame of visual SIFT property points; adopting simulation module as parameters estimation module for total estimation; adopting Gauss filter and curve matching method to process visual sequence process to fill unknown area.

The invention provides a method to deal with the failures of proxy call session control function, a UE is provided with a host and a standby P-CSCF by an IMS network, the UE and an S-CSCF are used for storing the information of the host and the standby P-CSCF, when the S-CSCF sends service requests to the UE through the host P-CSCF, if the host P-CSCF is overtime and gives no response, the S-CSCFcan send indication to the UE through the standby P-CSCF to request the UE to carry out initial registration, if the host P-CSCF sends back wrong responses, the S-CSCF can send indication to the UE through the host or the standby P-CSCF to request the UE to begin the initial registration, the UE can verify whether the P-CSCF which retransmits the indication is the host or the standby P-CSCF or not , if the result is yes, the initial registration request can be sent to the P-CSCF, after the success of the initial registration, the S-CSCF can send the service request to the UE through the P-CSCF which retransmits the initial registration request.

The invention discloses a method for generating exciting signals in bandwidth extension, which processes narrow-band low frequency signals via frequency spectrum folding and synthesis to generate required high frequency exciting signals. The invention further provides a reconstruction method for the high frequency signals in bandwidth extension and a device thereof. The technical scheme utilizes low frequency signals to generate high frequency signals, and is based on the harmonic characteristic of low and high frequency spectrums of the signals, therefore, the method can extend speech and music signals effectively, and the frequency spectrum folding method can confirm the signal frequency spectrum continuity of high and low frequencies at joint part. Tests prove that the technical scheme is suitable for extending ultra wideband signals of 7 to 14 kHz.

The invention discloses a process for synthesizing natural gas by methanation of coal synthesis gas, which comprises the following steps of: dispersing a fresh methanation catalyst into an inert liquid medium, delivering the medium into a slurry bed methanation reactor to perform reduction, performing methanation reaction on the transformed methanation raw gas after the reduction is finished, delivering the tail gas to a gas-liquid separator I, discharging the slurry liquid component and the catalyst in the tail gas from the bottom of the gas-liquid separator I, discharging the gas phase in the tail gas from the top of the gas-liquid separator I, delivering partial slurry liquid component containing the catalyst into a gas-liquid separator II, discharging the gas phase from the top of thegas-liquid separator II, merging the gas phases discharged from the tops of the gas-liquid separators I and II, cooling and purifying the gas phases to obtain synthesized natural gas, discharging theslurry liquid component containing the catalyst from the bottom of the gas-liquid separator II, merging the slurry liquid component discharged from the bottom of the gas-liquid separator II and the slurry liquid component and the catalyst discharged from the bottom of the gas-liquid separator I, discharging 1 to 5 percent of the weight sum of the slurry liquid component and the catalyst separatedfrom the two gas-liquid separators, and performing methanation reaction on the cooled rest slurry liquid component and catalyst and the fresh methanation catalyst dispersed into the insert liquid medium together. The process has the advantages of low power consumption and low equipment investment, and is easy to operate.

The invention discloses a three-dimensional convolutional neural network (3D CNN) based video classifying method and belongs to the technical field of video processing. According to the method, a video is sampled at equal intervals to obtain a plurality of video segments, a video database is amplified, three-dimensional video segments are directly input into a 3D CNN, and time domain and space domain characteristics of the video are extracted, so that the limitation of a conventional video classifying method in manually selecting video characteristics and video modeling modes is improved. A parallel distributed 3D CNN multi-classification model lowers the complexity in learning the 3D CNN and enables a classification system to realize distributed parallel computation more conveniently. Relatively high identification rate can be achieved with only fewer video segments based on a 3D CNN multi-classification system, and videos not belonging to any type can be classified into new type, so that the classification error of the new type is avoided.

The invention discloses a quantum key transmission control method. The method comprises steps as follows: a sending-end service application terminal and a receiving-end service application terminal negotiate to acquire various parameters of quantum keys; the sending-end and receiving-end service application terminals send key requests to first and second quantum key management terminals respectively and acquire the quantum keys; the sending-end and receiving-end service application terminals use the quantum keys to perform encryption, decryption and the like on user services or data, so that safe communication services are provided. The invention further provides the corresponding quantum key management terminals, the corresponding service application terminals and a corresponding quantum key transmission control system. With the adoption of the method and the system, the high efficiency and the consistency of application and acquisition of the quantum keys by the service application terminals can be guaranteed, the universality is good, and the method and the system can be applied to communication processes of different service application terminals and quantum key management terminals.

The invention relates to a base pit dewatering and water saving device and a construction method thereof. The middle part of the base pit of a baseboard structure is provided with a well pit; the well pit is internally and vertically provided with a no-sand tube; pebbly sand is filled between the bottom and periphery of the no-sand tube; the top of the no-sand tube is higher than the top surface of the well pit; a water pump is arranged in the no-sand tube; blinding layer concrete is poured at the top surface of the well pit which is at the periphery of the no-sand tube and the side wall of the base pit of the baseboard structure; and the top elevation of the no-sand tube is flush with the elevation of a blinding layer; a dewatering conduit is pre-buried in a base pit baseboard right above the no-sand tube, a waterproof layer is paved on the blinding layer concrete, a layer of waterproof and protective concrete is poured on the waterproof layer, and the base pit baseboards are poured above the waterproof and protective concrete and at the periphery of the dewatering conduit. The method of the invention has lower investment, saved cost and less amount of dewatering amount, thereby reducing the loss of underground water and protecting water resource; and the method can be adopted for a project in which the well point dewatering method is not ideal for dewatering or a project in which the underground water is near the base pit elevation.

The invention relates to a pneumatic elastic analytical method, and provides a pneumatic elastic mechanical characteristic analytical method of a hypersonic speed aircraft in thermal environment. According to the method, the piston theory is used for carrying out frequency domain nonsteady aerodynamic calculation on a full-aircraft finite element model of the hypersonic speed aircraft; on the basis, the pneumatic thermal effect on the model in the hypersonic speed thermal environment is considered; the weak coupling effect of pneumatic thermal input in aerodynamic input and elastic force input is ignored; only the structure temperature steady-state characteristics under the pneumatic thermal load effect are considered; after the steady aerodynamic calculation, the thermal flux density on the surface of the aircraft is obtained by adopting a reference enthalpy method; further, the steady temperature distribution on the surface of the aircraft is calculated; the practical equivalent rigidity matrix of the structure at the moment is obtained; and the critical flutter speed is calculated by an engineering method. The pneumatic elastic mechanical characteristic analytical method has the advantages that the pneumatic elastic analytical problem of the hypersonic speed aircraft in the pneumatic thermal environment is solved, and the pneumatic elastic performance of the hypersonic speed aircraft is improved through flutter speed analysis.

A lake wetland flood remote sensing monitoring method based on a model comprises the steps that: (1) the lake wetland time series multi-source remote sensing image data is acquired; (2) the water body in the remote sensing image is (semi-) automatically extracted; (3) the boundary is detected and confirmed between the water and the land, and the practical water area is calculated; (4) the data of the water area and the water level estimated by the remote sensing is carried out nonlinear statistic to modeling; (5) the acquired micro wave remote sensing image in the flood period is used, the established model is compared and validated, and the model is corrected; (6) based on the established high accuracy water area water level area distribution math model and the common remote sensing change monitoring method, the practical measured water level is combined with the acquired remote sensing image, the continuous real time monitoring to the wetland flood dynamic change is achieved. The invention can be compensated each other with a common earth surface environment change multi-time phase remote sensing image measurement method, and the invention has the important roles to the dynamic change monitoring of the wetland flood and the wetland process modeling research.

The present invention provides an online gas-solid two-phase detection method for coal characteristics based on laser induction, and an apparatus thereof. The apparatus comprises a sampling pipe, a coal powder conveying pipe, a cyclone separator, a coal powder falling pipe, a measurement room and a spectrum detection system. The detection method comprises that: the coal powder is subjected to continuous sampling at a proper position on an air-powder pipeline by the sampling pipe, wherein the air-powder pipeline is arranged between a coal mill outlet and a burner inlet; a cycle process of sampling, measuring and returning of the coal powder is realized with the effect of compressed air. According to the present invention, with adopting the measurement system of the measurement method, the taken gas-solid two-phase coal powder particles can be subjected to laser detection only after the simple gas-solid separation by the cyclone separator, and the sample preparing is not required; the gas conveying manner is adopted, and the mechanical transmission apparatus is not used so as to contribute to long term and reliable operation of the whole apparatus in the field environment, and really realize the online detection of the coal characteristics.

The invention discloses a bridge crack detection method. Due to the fact that manual marking has certain subjectivity, the pavement crack detection precision depends on experience knowledge of experts, and experience lacks objectivity in quantitative analysis. The method comprises the following steps: 1, collecting images of a detected bridge floor one by one to obtain a bridge floor image set; 2,splicing images; 3, detecting crack; 4, extracting crack parameter. According to the invention, the image acquisition and processing technology replaces human eyes to complete automatic nondestructive detection of the bridge crack, and has very important practical significance for research of the bridge crack detection technology in a complex terrain environment. On one hand, the construction safety is enhanced, and on the other hand, the operation maneuverability and flexibility are improved. According to the invention, fidelity splicing of multiple groups of bridge deck images is realized,the image splicing precision and efficiency are improved, a working foundation is laid for subsequent bridge crack image detection, and a technical reference is provided for image splicing detection in other fields.

The invention discloses an electroluminescent display panel, a display device and an obtained image display method thereof. According to the invention, an image obtaining area is set in a display area, sub-pixels in the image obtaining area are divided into a non-transparent display area and a transparent area so as to enable a camera placed below the image obtaining area to obtain an image through the transparent area, thereby realizing a camera shooting function in the display area, and being conducive to realizing a full-screen display design. A control circuit of the sub-pixels in the image obtaining area is only set in the non-transparent display area, an organic light emitting structure electrically connected with the control circuit is set at least in the non-transparent display area, thereby being capable of realizing a display function at least in the non-transparent display area while ensuring the transparency of the transparent area so as to ensure the continuity of the display. The obtained image can be displayed by adopting a method of reducing the resolution so as to improve the image clarity.

The invention relates to a helical involute gear and a processing method thereof. The helical involute gear is characterized in that a tooth surface molded line is a helical involute which is a curve spread by a rack type line straightly moving along the pitch circle tangent line and pure-rolling with a gear pitch circle. The helical involute gear has clear and easy drive principle, can ensure the drive continuity and the drive uniformity, and can realize surface meshing with large meshing area so that the bearing capacity is strong; the helical involute gear has long meshing line and large superposition coefficient, especially, an inclined helical involute conical gear is easy to implement speed reduction at high speed ratio. The helical involute conical gear can realize the expansion processing, thereby having high processing accuracy, low processing cost and high processing tooth surface hardness, improving the motion stability of the gear and the bearing capacity, and prolonging the service life. Meanwhile, processing equipment required by the helical involute gear can be conveniently processed by utilizing the method, thereby solving the difficulties of large processing difficulty and high cost of a gear drive pair with intersecting axes.

The invention relates to an automatic parking method based on hierarchical planning. Sensing modules arranged around a vehicle obtain information about obstacles in an ambient environment; a parking space size and a parking space type as well as obstacle existence in the parking space are deduced; when the parking space size meets the need and no object exists in the parking space, initial planning based on numerical optimization is carried out; when the initial planning does not meet the parking need, A* search planning and secondary value optimization planning are carried out based on current vehicle pose and parking space information and environmental obstacle information; and after successful planning, a trajectory control point is sent to a vehicle-mounted controller and the vehicle-mounted controller controls a vehicle steering wheel, an accelerator pedal and a brake pedal, so that the vehicle is parked in the target parking space. In addition, the invention also relates to an auxiliary automatic parking system comprising a sensing module, an HMI display module, a path planning module, and a vehicle path tracking module. Compared with the prior art, the automatic parking method and the auxiliary system have advantages of strong environmental adaptability and accurate trajectory calculation.