73 results about "Strategy switching" patented technology

A system, method, and computer program product enforce a universal security policy across several systems. In one embodiment, the system comprises a translation module that translates the universal security policy into local security rules enforceable by the security components of the several systems. The system also comprises a policy pushing module that transmits the translated local security rules to each of the several systems. Further, the system can include an analysis module for detecting local security rules in the several systems that are inconsistent with the universal security policy.

A policy processing system includes a storage section for storing a plurality of policies and a policy transition processor. Each of policies includes policy transition information including at least one transition-destination policy for a corresponding policy. Policy transition is performed such that, when a policy is activated due to occurrence of an event that matches the policy, the policy activated is changed to a corresponding transition-destination policy according to the policy transition information of the policy activated.

The invention discloses a method for controlling hybrid power urban buses. The method comprises the steps of off-line optimizing and on-line controlling. The idea of control strategy switching is put forward, driving reference working conditions targeting regions and more conforming to actual bus driving routes are established, off-line overall optimizing is carried out based on the working conditions, the optimum control effect can be achieved, and the problem that the dynamic planning cannot be applied to on-line and real-time control because the calculated quantity of the dynamic planning is large is solved. When the hybrid buses are driven actually, whether the similarities between the actual driving working conditions and the established driving reference working conditions and between the road prediction working conditions and the established driving reference working conditions are judged on line, if yes, real-time torque distribution is carried out on the hybrid power urban buses by calling dynamic planning optimum control parameters stored in a bus main controller, or otherwise, control strategies are switched, on-line and real-time control is carried out on the buses by adopting the fuzzy logic rule control strategy which is high in self-adaptability and realizability, and accordingly the control strategy adaptation is improved.

A policy system that can add/delete policies easily to/from devices as needed through existing interfaces and enable policies to be developed quickly on-site and applied to devices provided with new device interfaces and new commands. A policy manager registers each defined policy type in a database after the definition and searches and refers to the defined policy type upon receiving a policy so as to check the validity of the policy. A policy agent registers each defined policy translation rule in a database after the definition. Upon receiving a policy, the policy agent searches and uses the translation rule to translate the policy to a command string.

The invention discloses a hybrid modulation-based control method for the mid-point voltage balance of a multilevel inverter. The method comprises the following steps: detecting a capacitance transient voltage between the midpoint and the anode and a capacitance transient voltage between the midpoint and the cathode of a direct-current bus of the multilevel inverter by a sampling unit of a digital processing control module within each control period, and determining the bias of the two capacitance transient voltages; selecting an SVPWM (space vector pulse width modulation) or DPWM (digital pulse width modulation) control mode through a pulse width modulation strategy switching unit to work; outputting a control signal through an SVPWM/DPWM control processing unit; outputting a PWM signal through a drive circuit to control the working condition of each phase bridge arm switch tube of the multilevel inverter, and meanwhile, controlling the mid-point voltage balance of the multilevel inverter. The control method disclosed by the invention has the advantages that the switching frequency is reduced, the switching loss is reduced, output voltage and current harmonics are small, the output waveform quality is high, digital realization is convenient, and the like, and has an important engineering application value.

The invention relates to a flexible thin plate positioning fixture based on a T-type groove. The positioning fixture comprises a fixture bottom plate, a plurality of T-type groove sliding blocks, supporting sliding blocks, double-head bolts, positioning pins, positioning plates and clamp head supports. The T-type groove sliding blocks are slidably connected to the fixture bottom plate, and each T-type groove sliding block is slidably connected with two or three supporting sliding blocks. The lower ends of the double-head bolts are connected to the supporting sliding blocks, and the upper ends of the double-head bolts are connected with the positioning pins or are connected with the clamp head supports through the positioning plates. The heights of the positioning pins and the heights of the clamp head supports are adjusted through the double-head bolts. The clamp head supports are rotably connected with the positioning plates. The positioning pins are rotably connected with the double-head bolts. Compared with the prior art, different numbers of positioning plates can be selected to achieve the strategy switching from 3-2-1 positioning to 6-2-1 positioning; meanwhile, because each assembly can be disassembled and replaced, flexible changes of positioning strategies can be achieved.

The technical scheme disclosed by the invention includes a camera sharing system and method for multiple applications based on the Android. The camera sharing method for multiple applications based onthe Android comprises the following steps: obtaining the data address of a camera device in the Android system; creating a plurality of virtualized camera devices to perform sharing and correlation on the data address obtained by an address acquisition module, wherein the data address of each virtualized camera device has a unique identifier; obtaining the video data of the camera device throughthe data address by means of the virtualized camera device and sending to the corresponding application; and using the function of the camera device. The camera sharing system and method for multipleapplications based on the Android have the beneficial effect that multiple applications can use the camera device and the camera function in the Android system without the strategy switching of the camera device.

A network with a network wide extended policy framework comprising: path computation clients (PCCs), associated with at least one local policy enforcement point (PEP); path computation servers (PCSs), associated with at least one policy decision point (PDP). The PEPs and PDPs adapted to exchange attributes determined by at least one PDP. PDPs are adapted to identify network elements network services requiring identical configuration parameters by evaluating parameters advertised in the network and update policy related to identified groups in case of configuration error. Updated policy is distributed by PDP in policy notification to PEPs associated with network elements network services of identified group. The PEPs receiving policy notification comprising updated policy from PDP adapted to translate the updated policy into configuration settings of network elements network services the identified group.

The invention provides strategy optimization based method and device for repairing a fault of terminal software. The method comprises the following steps: step S1, sending a remote repairing request to a terminal by a server after a fault occurs to the terminal software and performing the steps S2 and S3 in sequence if a user fails to accept the request, otherwise, selecting a repairing strategy existing in the server by the server according to the fault information and transmitting to the terminal, and ending the process after repairing the fault according to the repairing strategy by the terminal; step S2, repairing voluntarily by the user, recording the repairing strategy of the user and transmitting the repairing strategy data to the server by the terminal; step S3, establishing a function model by the server, comparing the repairing strategy of the server converted by the repairing strategy of the user with the repairing strategy corresponding to the fault information existing in a database, substituting the latter one with the previous one if the previous one is superior to the latter one so as to update the database, and otherwise, ending the process. The technical scheme of the invention reduces the remote repairing expense of the server and improves the fault repairing efficiency.

The invention discloses a fuzzy neural network control method for an omni-directional intelligent wheelchair to avoid an obstacle. An obstacle avoidance algorithm on the basis of an improved fuzzy neural network is combined with a strategy transforming mechanism and a state control variable is added to solve the problem of an obstacle avoidance condition with the motion direction out of an angle of a view field. The state control variable is adopted to record a motion state of a user in the moving process; a path planning result is guaranteed to be close to an original motion direction of the user as far as possible; automatic obstacle avoidance navigation of the omni-directional intelligent wheelchair is implemented. Compared with a conventional obstacle avoidance algorithm, when facing the same obstacle, the fuzzy neural network control method can well forecast the moving direction and the moving speed of the dynamic obstacle so as to rapidly plan an obstacle avoidance path; the obstacle avoidance method provided by the invention enables the wheelchair to carry out obstacle avoidance path planning according to the intention of the user to the greatest degree and not only optimizes the obstacle avoidance path, but also shows humanistic care for the user.

The embodiment of the invention provides an adaptive hierarchical modulation and service multiplex transmission method in a high-speed mobile environment. The method comprises the steps that: a receiving end sends estimated channel state information to a sending end, and the sending end calculates by the channel state information to obtain a conditional probability distribution function of a signal-to-noise ratio of a current time slot; a robustness hierarchical modulation scheme is adopted for a high-speed railway scene, and on the basis of the signal-to-noise ratio of the current time slot,an average bit error rate expression of each bit is obtained; scheduling distribution is carried out on multiple services on the basis of the robustness hierarchical modulation scheme, and bit distribution is carried out according to the received signal-to-noise ratio and a modulation parameter, and an optimal modulation transmission strategy switching table is obtained; an adaptive modulation transmission scheme is executed, and an optimal modulation transmission strategy corresponding to current channel state information is selected from an optimal modulation transmission strategy table; andthe sending end sends data according to the optimal modulation transmission strategy. According to the invention, adaptive and efficient transmission can be implemented, and performance of a mobile communication system can be improved.

The invention discloses a safe driving assistance method and system based on change of license plate pixel height. The safe driving assistance method based on the change of the license plate pixel height comprises the steps that a camera is set to shoot images in front of a vehicle; the current speed Vt and the camera-to-vehicle head distance S2 of the own vehicle are collected; a license plate isidentified and the pixel height h of the current license plate is determined according to license plate images shot by the camera; the current vehicle distance D is determined, wherein the vehicle distance D is determined by the focal length f of the camera, the actual height H of a front license plate and the pixel height h of the license plate; a current safe distance S is determined, wherein the safe distance S is determined according to a driver reaction distance S0, a driver braking distance S1 and the camera-to-vehicle head distance S2; and the vehicle speed is controlled to ensure thatthe vehicle distance D is greater than the safe distance S. The driving strategy switching based on the change of the license plate pixel height is very suitable for controlling the vehicle speed infuture automatic driving, in particular to a driving speed control method for an automatic driving vehicle on an expressway in a lane.

The invention discloses a unified management method, a device and a system for the security policies of heterogeneous cloud platforms. The method comprises the steps of receiving abstract security access strategies input by a user; converting the abstract security access policies into a specific security access policy of an underlying cloud platform; and sending the specific security access policyto the corresponding underlying cloud platform. According to the invention, based on the abstraction of security policy rules, the security policies of the heterogeneous cloud platform are unified through adopting the adapter technology. As a result, security policy rules set at the user level can be automatically adapted to all cloud platforms. Therefore, the unified management and the unified configuration of the security strategies of the heterogeneous cloud platforms are achieved, and the good practicability is achieved.

The invention belongs to the field of power and electron technology, and provides a system and a method for controlling a Buck converter based on phase path planning and tracking. PWM control is carried out on a switch element in the Buck converter by a controller, and the controller is internally provided with a load recognizer, a path planning device, a supervising device, a path prediction controller, a PI controller, a selector and a digital pulse-width regulator; the load recognizer is used for detecting the load parameter of the Buck converter; the path planning device is used for establishing a state model and planning a phase path of the Buck converter; the path prediction controller is used for detecting an inductive current value, and comparing with a prediction planning inductive current value to realize tracking control for dynamic paths; the supervising device is used for outputting a control strategy switching signal; the PI controller is used for realizing steady tracking; the selector is used for selecting a control strategy; and the digital pulse-width regulator is used for driving the switch element in the Buck converter to realize the PWM control. According to the system and the method, quick response for the Buck converter and accurater control for the Buck converter are realized.

A system and method for managing data resources includes a policy definition layer, a policy deployment layer and a policy execution layer. The policy definition layer provides for creating, editing and visualizing policies through a user interface using intuitive simple language constructs. The policy deployment layer converts the created policies into a relational format that can be directly stored in a policy database. The policy execution layer executes the deployed policies on occurrence of an event. A resource abstraction and notification layer provides the interfacing of the resources with the policy definition layer, policy deployment layer and the policy execution layer.

The invention discloses a robot conversation method. The method comprises the following steps that S100) different conversation strategies which include full-intervention, semi-intervention and non-intervention conversation strategies at least are pre-stored; S200) a response signal is generated according to the present conversation strategy; S300) in response to a selection instruction, the present conversation strategy is converted into a selected conversation strategy; and S400) a response signal is regenerated according to the selected conversation strategy. Thus, a robot can make motions adapted to a conversation scene.

The invention discloses a method and device for controlling an energy storage system. The method includes the steps of obtaining output active power and output reactive power of the energy storage system; acquiring a characteristic signal of a grid voltage; and generating a voltage control signal according to the output active power, the output reactive power and the characteristic signal, so as to control an energy storage converter of the energy storage system according to the generated voltage control signal to perform energy conversion. According to the technical scheme, control signal generation methods for the energy storage system in an off-grid mode and a grid-connected mode are not distinguished, the strategy conversion between PQ control and Vf control during traditional off-gridand grid-connected switching is avoided, seamless switching of off-grid and grid-connected working modes is achieved, the application field of the energy storage system is greatly expanded, auxiliaryfunctions of the energy storage system are enhanced, and the method and device for controlling the energy storage system are suitable for the development needs of smart grids and microgrids.