3508results about How to "Easy to expand" patented technology

A device for treatment of mitral annulus dilation is disclosed, wherein the device comprises two states. In a first of these states the device is insertable into the coronary sinus and has a shape of the coronary sinus. When positioned in the coronary sinus, the device is transferable to the second state assuming a reduced radius of curvature, whereby the radius of curvature of the coronary sinus and the radius of curvature as well as the circumference of the mitral annulus is reduced.

The invention discloses a security cloud storage system based on increment synchronization. A three-tier architecture of client-intermediate server-private cloud terminal is adopted, and data security is guaranteed by multiple security protection technology. After being blocked and encrypted, a user file is transmitted to a cloud terminal through an SSL (security socket layer) security transmission protocol; after finishing the work of user management and key management, the intermediate server terminal adopts a mutual authentication mechanism and an access control mechanism to realize the safe data share so as to completely prevent original data from leaking from the server terminal; the binding of the file and a mobile device is realized at a client, the specific file can be only opened on a specific device, and even though the file is leaked by an insider, a leaking device can be traced; moreover, the unique increment synchronization technology is realized, and the file can be synchronized by only synchronizing modified file blocks, so that the flow consumption in the file transmission process is reduced, the transmission efficiency is improved, the system usability is enhanced, and user experience is promoted.

The invention relates to a battery energy storage system based power conversion system and a control method thereof. The power conversion system comprises a battery energy storage system, a bidirectional DC/DC (direct-current) converter, a grid-side current transformer, a filter circuit and an isolated voltage transformer. The battery energy storage system is in parallel connection with a direct-current bus of the grid-side current transformer through the bidirectional DC/DC converter; the grid-side current transformer, the filter circuit and the isolated voltage transformer are connected in sequence; and the isolated voltage transformer accesses to a power grid. The control method includes sequentially monitoring the battery energy storage system, the bidirectional DC/DC converter, the grid-side current transformer, the filter circuit and the isolated voltage transformer by a control circuit. Since the battery energy storage system utilizes battery cells connected in series and is in parallel connection with the common direct-current bus through the bidirectional DC/DC converter, circulation among battery packs is avoided, and capacity expansion of the system is facilitated. Further, by the aid of the monitoring control strategy for SOC (super capacitor state of charge) of the battery energy storage system and battery end voltage, excessive charge or discharge state of the battery energy storage system is avoided, service lives of the battery packs are prolonged, and comprehensive service cost is lowered.

The invention discloses a data cross-platform migration method and a data cross-platform migration device, which are used for data migration between different database systems. The device comprises a source data information module, a target data information module, a conversion module, an SQL (Structured Query Language) Engine, a data packet encapsulation, transmission and analysis module and an SQL statement execution module. The information on a source data platform and the information on a target data platform are described through the source data information module and the target data information module, a table is acquired from the source database to generate a Table object, the Table object is subjected to format conversion by the conversion module according to an XML (Extensible Markup Language) file for describing the mapping relation of fields between the databases, the converted information is constructed into an SQL statement by the SQL Engine, the SQL statement is encapsulated and transmitted to the platform where the target database is positioned, and the SQL statement is executed on the target platform to finish data migration. The method and the device realize smooth and lossless migration of the data between different databases of a heterogeneous platform.

The invention discloses a recipe generation system of a cooking utensil and the cooking utensil. The recipe generation system comprises an operation part, a weight detection part used for measuring the initial weight of cooking materials added into the cooking utensil in sequence and measuring the total weight of the cooking materials in a cooking process and when the cooking is finished, a time counting part, a parameter calculating part used for obtaining the ratio of the cooking materials according to the initial weight of the cooking materials and calculating the weight loss of the cooking materials at different cooking time points, and a parameter determining part used for determining the liquid boiling time point according to the change of the weight loss of the cooking materials along with time and determining the after-boiling heating time according to the liquid boiling time and the cooking finish time. According to the recipe generation system, through detection of a series of operations in the cooking process and information processing, the components of dishes in the cooking process can be determined and the key cooking elements and cooking processes of the dishes can be formed, so that the components, key cooking elements and cooking processes of the dishes can be used in a subsequent cooking process.

The invention provides a Hadoop-based commodity recommendation system comprising five layers: a data access layer, a data model layer, a recommendation algorithm layer, a recommendation engine layer, and a recommendation application layer. The insides of all layers employ modularization designs and all layers interact with each other based on interfaces, thereby realizing high cohesion and low coupling of the system architecture and high extensibility. The database of the system employs Hive; convenient on-line shopping functions like commodity browsing, purchasing payment, logistics allocation, after-sales service and the like can be provided for users. On the basis of the high-efficiency, reliable, and convenient-extension distributed system infrastructure, the system is suitable for large-scale data storage and computing processing; the system based on a novel design and a good design plan has the broad market promotion prospects.

The invention discloses a patrol robot system for an overhead high-voltage transmission line. The patrol robot system comprises a robot, the overhead line and a ground base station. The overhead line is supported through a cross bar. The robot comprises a robot body, a battery, a walking device, a single-chip microcomputer, a monitor device and a mobile communication device. The ground base station comprises a ground communication device and a ground monitor device. The ground base station and the robot are connected in a satellite communication mode. A robot platform is arranged on one side of the overhead line. The walking device comprises a walking mechanism and an obstacle avoidance mechanism. The walking device is connected with the single-chip microcomputer. The monitor range of the patrol robot is wider, environmental interference resistance is higher, the better obstacle avoidance mechanism is provided, a rest area is provided for the patrol robot, the service life of the patrol robot is prolonged, an automatic charging device is provided, work loads of workers are reduced, and the work of patrolling high-voltage lines and ultra-high-voltage lines can be completed excellently.

The invention provides a micro-grid new energy hybrid energy storage system which comprises a new energy power generation subsystem, an energy storage carrier subsystem, a converter subsystem, a high/low-voltage power distribution subsystem and a background monitor subsystem. According to the invention, battery equalization is performed through a BMS (battery management system), a cask effect caused by non-uniformity of voltage, capacity and other parameters is avoided, and the phenomena that the capacity of the whole group is reduced and the service life of the battery is shortened due to vicious circle of performance of the battery pack are avoided. Meanwhile, a refrigeration mode of air-conditioning equipment is scientifically controlled through a heat management system, so that the battery keeps a proper, uniform and stable environment temperature in the operating process. Therefore, the service life of the storage battery is prolonged, and the operating cost is effectively reduced. A container modular energy storage scheme is adopted, the system can be designed into a miniature temporary power generation system, and the construction investment is low. The system is convenient to use and can be transported into bad condition environments such as fields for performing power generation and supply under emergency circumstances. The system can be constructed into a large energy storage power station in a centralized mode, and the capacity is conveniently expanded.

An isolated thermal interface is presented. The inventive interface includes a flexible graphite sheet having two major surfaces, at least one of the major surfaces coated with a protective coating sufficient to inhibit flaking of the particles of graphite.

The invention relates to a process for purifying and recycling hot water by a membrane method as well as used equipment and process flow thereof. The process is a technology for treating, purifying and recycling hot and industrial high-temperature wastewater on the basis of a membrane method. The process has the characteristics that the combined process of an ultrafiltration and microfiltration membrane system, reverse osmosis, a nanofiltration membrane system, pretreatment, active carbon adsorption, ion exchange, and the like can be operated at high temperature and purify different hot water and wastewater, has dual effects of recycling water resources and heat energy and can adopt different process combinations and process flows according to components of water quality so as to achieve the aims of simplifying the process flows and reducing the system and running cost.

The invention provides a target tracking method and system and a staff behavior analyzing method and system. The target tracking method comprises the steps that a camera is used to acquire a video image; a front head classifier, a back head classifier, a left head classifier and a right head classifier are respectively used to detect candidate head targets in the current image; deduplication and screening are carried out on the candidate head targets detected by the classifiers; head targets which does not meet a tracking condition are deleted; and the remaining head targets are respectively tracked. The technical problems of false positives, false negatives, difficulty tracking and high camera erection requirement, which are caused by easily being blocked, difficulty target classification and the like, of a staff detection and tracking method based on face detection, head and shoulder detection or whole body detection are solved. According to the invention, accurate staff track tracking can be carried out based on the head targets; the problem of target restating can be reduced; and staff behavior analyzing can be carried out based on tracking results.

The invention provides a heterogeneous database synchronization method and an application system. A synchronous processor arranged on a side of a source data source can periodically poll change data recorded in a synchronous change table and encapsulate the change data into a data stream to send the data stream to a synchronous analyzer arranged on the side of a target database. The synchronous analyzer de-capsulates the data stream, then maps the change data in the source data table into a data structure of a target data table in the target database according to preset mapping files, and synchronizes the data of the target data table according to the change type values in the change data so as to complete the data synchronization of heterogeneous databases. The heterogeneous database synchronization method and the application system disclosed by the invention can achieve the data synchronization of heterogeneous databases just by setting different mapping files on the synchronous analyzer instead of changing the existing heterogeneous databases, the implementation is simple, and the expansion is easy.

The invention provides an underwater autonomous robot fixed depth control method based on reinforcement learning and belongs to the underwater robot control field. The method comprises steps that firstly, a Markoff decision process model for underwater autonomous robot fixed depth control is constructed, and expressions of a state variable, a control variable, a transfer model and a one-step lossfunction for underwater autonomous robot fixed depth control are respectively acquired; the decision network and the evaluation network are respectively established; through reinforcement learning, the decision network and the evaluation network can be continuously updated whenever an underwater autonomous robot moves forwards for each step during fixed depth control training till convergence; thefinal decision network for fixed depth control is acquired. The method is advantaged in that fixed depth control on the underwater autonomous robot under the condition of a completely-unknown underwater autonomous robot dynamic model is realized, and the practical value is high.

The invention discloses a large-capacity battery converter and control method thereof. The converter of the invention comprises several branch single stage type DC/AC converter modules parallel to one another. Each battery cluster (Battery Cluster BC) converges energy to an AC bus via each branch single stage type DC/AC converter module to be transformed in voltage in order to connect to an AC grid or to operate independently with load. The invention solves the circular current and uniform current problems brought by serial and parallel connection of the battery cluster, and adopts the technology of module combination and alternate balance to effectively improve the system efficiency under low power and power quality at the AC and DC sides and to realize balanced use of the battery cluster. Each battery branch can conduct intelligent charge and discharge management and the control function and the protection function are configured independently to ensure the largest availability of the system. The invention has simple structure, small volume, small energy loss, easy modularization, high reliability, small output harmonic wave, good system expansibility and low requirement to insulating ability of the converter and can operate with reduced capacity when the unit is in failure. The control method of the large-capacity battery converter of the invention is convenient and simple in operation and easy in realization.

The invention discloses a mobile terminal safe lock network lock card protecting and unlocking method based on the asymmetrical algorism that includes: the mobile terminal safe lock network lock card protecting method based on the asymmetrical algorism and the mobile terminal safe lock network lock card unlocking method based on the asymmetrical algorism. The invention solves the disadvantages of easy to be decrypted and the complex schedule hard to realize those existed in the present locking network locking card technique.

A preparing method for a crystallite wear-resistant ceramic ball belongs to a technical field of abrasive media, which is characterized in that: firstly preparing a superfine material adopting wet ball milling, spraying and prilling; then rolling moulding; finally the crystallite wear-resistant ceramic ball with a diameter of 0.5-50mm after drying, firing and polishing. The inventive method has lots of advantages such as little equipment, low cost, large output and easy expansion; meanwhile, the ceramic ball is high-density, wear-resistant and stable.

The invention relates to a comprehensive automation integrated protecting method and a system which adopt an integrated IED to carry out automation functions such as protection, measurement and control, computation and the like of all bay units in a substation; state quantity, analog quantity and digital quantity which are output in interval by primary equipment on a process layer of the substation are respectively uploaded to the integrated IED through an ethernet switcher by a dual Ethernet (100mega/1000mega), and the protection and automation function of the substation are realized by calculating and processing the state quantity, analog quantity and digital quantity which are output in interval respectively by the integrated IED, therefore, a spacing layer and a substation layer of the substation are unified into one layer according to IEC61850 standard, and a plurality of IEDs are integrated into one integrated protecting IED, and two same integrated IEDs are provided for hot spare for improving the reliability. The comprehensive automation integrated protecting system leads the substation integrated protecting functions to share a uniform information platform, and communication network is used for replacing control cables, thus improving the reliability of the signal transmission, further improving automation and management level and reducing comprehensive construction cost.

A plug for stopping the flow of bone cement in a channel within bone, such as the intramedullary bone canal or a previously prepared channel, includes an elastomeric inflatable structure protected from bone fragments and sharp edges by a shield extending around distal and peripheral sides of the inflatable structure. This inflatable structure is preferably formed as a sleeve extending around a core. The shield includes a distal end fastened to the core and a flexible portion expandable with inflation of the inflatable structure. The core is also removably connected to an insertion tool, with passageways in the insertion tool and in the core being used to insert a fluid into the inflatable structure. A valve extends as a sleeve around the core, and over the passageway, allowing fluid to flow into the inflatable structure, but preventing it from flowing out of the inflatable structure.

The invention relates to a modality switching underwater robot and a control method thereof. The modality switching underwater robot comprises a water surface control system and an underwater control system, wherein the underwater control system comprises an underwater sensing device, an underwater controller and an underwater robot, and the underwater robot comprises a carrier module, a switching module, a trolley module and a video collecting module. According to the control method of the modality switching underwater robot, the underwater controller is adopted to enable video information collected by the video collecting module and sensing information sensed by the underwater sensing device to be uploaded to the water surface control system through umbilical cables and receive control signals sent out by the water surface control system at the same time so as to achieve control over the swimming movement and wall climbing cleaning of the underwater robot. According to the modality switching underwater robot and the control method of the modality switching underwater robot, the self-weight, the size, the manufacturing cost, the processing difficulty, the energy consumption of a power supply system and the like are reduced to the maximum degree, and the modality switching underwater robot has various functions of swimming, sorption, crawling, cleaning and underwater monitoring and is high in practicability and wide in application range.

The invention discloses a vulnerability scanning method based on a movable agent and belongs to the technical filed of information safety. The vulnerability scanning method based on the movable agent includes that a user sets scanning parameters through a configuration module and triggers a roaming agent module to send out roaming agent through a management agent module, the management agent module transmits a needed vulnerability feature base from a vulnerability base module through an encryption transmission mechanism, the roaming agent moves in circulation among hosts which need to be scanned in the network and collects a running state of each scanning sub-agent module, scanning results are transmitted to the management agent module through the encryption transmission mechanism after each scanning sub-agent module completes scanning, and the management agent module triggers a result disposing module to conduct unified classification and sorting of the vulnerability scanning results. The vulnerability scanning method based on the movable agent helps and guides evaluation personnel to complete assessment to a computer information system and can conduct automatic comprehensive analysis and processing to each assessment record, and objectivity and accuracy of evaluation results are ensured.

The invention discloses a modular full direct current photovoltaic system and a control method thereof. The system comprises n DC (direct current)-DC converter modules and an MMC (Multi Media Card) centralized inverter, and every DC-DC converter module is connected with an independent control loop and a maximum power tracking control function so as to ensure that a photovoltaic battery pack connected with every DC-DC converter works on the highest point of the output power. According to the modular full direct current photovoltaic system and a control method thereof, a direct current bus is formed by connecting the output ends of a plurality of DC-DC converter modules in series, and the high-power grid-connected power generation function is achieved through the centralized MMC inverter. The direct current bus can effectively reduce the operating loss of the entire system and structurally improve the operating efficiency of the system.