70 results about "Virtual state" patented technology

A network appliance for monitoring, diagnosing and documenting problems among a plurality of devices and processes (objects) coupled to a computer network utilizes periodic polling and collection of object-generated trap data to monitor the status of objects on the computer network. The status of a multitude of objects is maintained in memory utilizing virtual state machines which contain a small amount of persistent data but which are modeled after one of a plurality of finite state machines. The memory further maintains dependency data related to each object which identifies parent/child relationships with other objects at the same or different layers of the OSI network protocol model. A decision engine verifies through on-demand polling that a device is down. A root cause analysis module utilizes status and dependency data to locate the highest object in the parent/child relationship tree that is affected to determine the root cause of a problem. Once a problem has been verified, a “case” is opened and notification alerts may be sent out to one or more devices. A user interface allows all objects within the network to be displayed with their respective status and their respective parent/child dependency objects in various formats.

Systems and processes for converting speech-to-text are provided. In one example process, speech input can be received. A sequence of states and arcs of a weighted finite state transducer (WFST) can be traversed. A negating finite state transducer (FST) can be traversed. A virtual FST can be composed using a neural network language model and based on the sequence of states and arcs of the WFST. The one or more virtual states of the virtual FST can be traversed to determine a probability of a candidate word given one or more history candidate words. Text corresponding to the speech input can be determined based on the probability of the candidate word given the one or more history candidate words. An output can be provided based on the text corresponding to the speech input.

A method of evaluating the quality of a read signal from the viewpoint of the detection margin of a Viterbi decoder in the PRML method in which a target signal level varies depending on the read signal, and an optical disc apparatus implementing the method. A method of evaluating the quality of a signal pattern comprising a combination of minimum run lengths from the viewpoint of edge shift, and an optical disc apparatus implementing the method. From the target signal level that varies depending on the read signal, a target signal is generated based on a decoding result, and an error target signal is generated in which the decoding result is edge-shifted. The signal quality is evaluated by calculating a Euclidean distance between these signals and the read signal. A virtual state that is not included in the Viterbi decoder and that is less than the minimum run length is defined, and a target signal level for the virtual state is generated using a target signal level table inside the Viterbi decoder, based on the concept of convolution. In this way, the signal quality can be evaluated by the same method as mentioned above even in cases where the pattern of a combination of the minimum run lengths has edge-shifted.

The invention discloses a display method of a virtual role which comprises the following steps: A, song control information is stored in a song; B, the various display data and the virtual stage of the virtual role are manufactured; C, a song playing manager manages the playing of the song and obtains the singing information of a player and the song control information; D, a song analyzer analyzes the singing information of the player and the song control information transmitted by the song playing manager; E, a role controller obtains the result of the song analyzer, reads the corresponding display data and the virtual state of the virtual role and shows. The display method of a virtual role highly simulates the virtual role for live performance from the aspects like motions, expressions, music styles, stage effects, and the like, thus leading the virtual role to carry out displaying according to the music (or song), thereby solving the problem of simply single display of the current virtual role.

A test device (21) sits between two or more nodes (20, 22). The nodes (20, 22) communicate in conversations, according to some predetermined protocol. The test device (21), under user control, may introduce jitter, drop packets, create new packets, reroute packets, and reorder packets in the conversations. Particular conversations are detected and tracked by respective virtual state machines (38, 39, 40) within the test device.

The invention discloses a high-voltage direct-current power transmission multi-channel supplementary damping control method based on a variable structure. The high-voltage direct-current power transmission multi-channel supplementary damping control method has the characteristics that sub-synchronous and low frequency oscillation frequencies and damps, and a system reduced-order model are identified by a TLS-ESPRIT (Total Least Squares-Estimation of Signal Parameters via Rotational Invariance Techniques) algorithm with high operation efficiency and anti-interference capability; a variable structure control principle is combined and an attached controller containing a virtual state variable is designed; finally, a state observer is led in to eliminate the virtual state variable so as to realize an HVDC (High Voltage Direct Current) variable structure controller with an output feedback form; then a variable structure control theory is used for designing a multi-channel direct-current attached damping controller so as to reduce the mutual influences between oscillation modes; the sub-synchronous and low frequency oscillation can be inhibited synchronously. The method is efficient and feasible; the variable structure control theory has strong disturbance rejection on complicated changeable working conditions of an actual power grid; meanwhile, a multi-channel structure is utilized by using the controller to solve a coordinated control problem among the plurality of controllers; the invention provides a controller design method of an actual large power grid with very strong operability.

The invention discloses a grading optimization method for an asphalt mixture under virtual state. The method includes the steps of: on the basis of grading that needs to optimize according to practical demand, in three-dimensional discrete element software PFC3D, randomly generating an asphalt mixture mechanical test three-dimensional discrete element model (including uniaxial penetration test, low temperature split test, uniaxial compression test and shear fatigue test) which satisfies a target grading, wherein the generation process of the three-dimensional discrete element model, which satisfies the target grading, is the base of asphalt mixture grading optimization; and comparing mechanical performance evaluation results of various grading to obtain a grading having best mechanical performance. The method has strong operability, convenience and representativeness.

The invention provides a simulation method for a four-rotor aircraft, and relates to a real-time simulation method of an unmanned aircraft. The simulation method for the four-rotor aircraft solves the problems that an existing semi-physical simulation system is huge in size, complex in connection, low in accuracy due to the fact that virtual state variables exist in simulation, and low in accuracy of a model obtained through modeling applying a controller design method based on the models and a numerical simulation system mechanism, wherein the controller design method based on the models and the numerical simulation system mechanism cannot be applied to modeling easily. According to the simulation method for the four-rotor aircraft, the actual aircraft is regarded as the controlled object and connected to a simulation circuit, and a reference is provided for the numerical simulation models obtained by mechanism modeling in MATLAB/Simulink, so that accuracy of aircraft mechanism modeling can be verified rapidly. A parameter recognition method is adopted so as to guarantee accuracy of objective models in numerical simulation, so that feasible controllers are verified in the numerical simulation and the controllers can be finally effectively applied to actual physical objects. The simulation method for the four-rotor aircraft is specifically applied to the field of four-rotor aircraft simulation.

The invention discloses a display method and apparatus. A specific embodiment of the method comprises the steps of obtaining an experiment environment image; presenting a state image for indicating a state used for an experiment in which an experiment instrument is located when the target experiment is carried out, on an experiment instrument image in an augmented reality manner; in response to the condition that gesture operation of a user is detected, based on a corresponding relationship between the gesture operation and experiment operation of the target experiment, determining experiment effect information of the experiment operation, wherein the experiment effect information comprises an experiment effect image; and presenting the experiment effect image in the experiment environment image, on which the state image is presented, in the augmented reality manner. According to the method and the apparatus, virtual state image and experiment effect image can be superposed on a real environment image, so that the reality degree of display is increased.

The invention discloses a two-dimensional code identification method which comprises the steps that arraying directions of identification head code points, distances among the identification head code points, mass center positions of the identification head code points, a position of a dominant straight line, and the number of code elements in a content data component in a code word block are confirmed; a virtual state box of the whole code word block is obtained according to the arraying directions of the identification head code points, the distances among the identification head code points, the mass center positions of the identification head code points, the position of the dominant straight line, and the number of the code elements in the content data component in the code word block; a coded value indicated by each code element of the content data component is obtained according to the virtual state box of the whole code word block, and combined according to a set sequence; and coded information of the whole code word block is obtained. Correspondingly, the invention further discloses a two-dimensional code identification device, a two-dimensional code reading method and a two-dimensional code micro platemaking method. According to an approximate position of a locating code word block of the dominant straight line, an identification algorithm is simple, and an identification rate is high.

The invention discloses a multi-band high voltage direct current power transmission supplementary damping control method based on a multi-stage linear optimal theory. The method is characterized in that a TLS-ESPRIT algorithm with high computational efficiency and anti-interference capacity to identify secondary synchronization and low frequency oscillation frequency and damping and a system deflation model; the multi-stage linear optimal theory control principle is combined to design an additional controller with virtual state variables; a state observer is introduced; the virtual state variables are eliminated to realize an output feedback type HVDC multi-stage linear optimal theory controller; the multi-stage linear optimal theory is used to design a multi-band stream additional damping controller; mutual influence between oscillation modes is reduced; and secondary synchronization and low frequency oscillation can be simultaneously suppressed. The method is easy and efficient. The multi-stage linear optimal theory has strong anti-interference capacity for complex and variable conditions for a real power grid. A multi-band structure is used to solve the problem of coordinated control among multiple controllers. The design method of a real large power grid controller with high operability is provided.

The invention provides a capacitor voltage single sensor-based LCL-type gird-connected inverter control method, relates to an inverter control method, and aims at solving the problems that an active damping control sensor of an LCL-type gird-connected inverter is high in cost and a traditional observer method is complicated. The control method comprises the following steps: (1) collecting a capacitor voltage uC in an LCL filter; (2) inputting the collected capacitor voltage uC into an extended state observer to obtain a virtual state quantity; (3) converting the obtained virtual state quantity, and obtaining a real state quantity estimation value as shown in the specification and a network voltage estimation value as shown in the specification, wherein the state quantity estimation value comprises a network current estimation value as shown in the specification and an inverter current estimation value as shown in the specification; and (4) generating a drive signal of the inverter according to the obtained network current estimation value as shown in the specification, inverter current estimation value as shown in the specification and network voltage estimation value as shown in the specification, and controlling the inverter by the drive signal. The capacitor voltage single sensor-based LCL-type gird-connected inverter control method is applied to control on the LCL-type gird-connected inverter in the occasions of renewable energy conversion and the like.

The invention discloses an energy-saving control method for an electric automobile driven by a four-wheel hub motor, and belongs to the technical field of control. The energy-saving control method forthe electric automobile driven by the four-wheel hub motor aims to achieve energy saving of the electric automobile driven by the four-wheel hub motor through the reasonable design of the ideal stateof the automobile and the optimized distribution of the torque of the automobile and ensuring the operation stability of the automobile. The method comprises the steps that of S1, establishing a tirelongitudinal sliding model, S2, obtaining an expected vehicle yaw rate and a mass center yaw angle based on the vehicle model established in the step S1, S3, obtaining additional yaw moment requiredby vehicle stability, S4, introducing two virtual state quantities of the front wheel longitudinal slip rate and the rear wheel longitudinal slip rate based on a model predictive control theory, and S5, distributing the vehicle virtual rear wheel torque obtained in the step S4 to a left rear wheel and a right rear wheel of the vehicle. The method is not only applicable to conventional working conditions, but also applicable to limit working conditions such as high speed and low adhesion, the energy consumption is reduced, and the energy saving performance of the vehicle is improved.

A method of evaluating the quality of a read signal from the viewpoint of the detection margin of a Viterbi decoder in the PRML method in which a target signal level varies depending on the read signal, and an optical disc apparatus implementing the method. A method of evaluating the quality of a signal pattern comprising a combination of minimum run lengths from the viewpoint of edge shift, and an optical disc apparatus implementing the method. From the target signal level that varies depending on the read signal, a target signal is generated based on a decoding result, and an error target signal is generated in which the decoding result is edge-shifted. The signal quality is evaluated by calculating a Euclidean distance between these signals and the read signal. A virtual state that is not included in the Viterbi decoder and that is less than the minimum run length is defined, and a target signal level for the virtual state is generated using a target signal level table inside the Viterbi decoder, based on the concept of convolution. In this way, the signal quality can be evaluated by the same method as mentioned above even in cases where the pattern of a combination of the minimum run lengths has edge-shifted.

A system and method for interfacing a single host application with multiple machines to be controlled by the host application via a local area network minimizes the complexity of dealing with multiple controlled entities by utilizing a single virtual state machine manager communicating with the host application. The virtual machine manager communicates with the controlled machines via machine proxies in conjunction with a command cache state machine and a command cache, which stores previous action requests generated by the host application. A machine epoxy is created for physical controlled entity attached to the system.

The invention discloses a computer system state monitoring method. The computer system state monitoring method comprises the following steps that a virtual state monitoring device is added into a computer; the virtual state monitoring device corresponds to a state monitoring chip connected to a south bridge of the computer, and is driven by an ACPI device drive program; an operation system is informed to generate an abnormal event according to an ACPI method, wherein when the state monitoring chip connected to the south bridge of the computer generates the abnormal event when finding the system state abnormity, the abnormal event is transmitted to the ACPI device drive program according to the ACPI method, and then the ACPI device drive program informs the operation system; the ACPI device drive program obtains the state data processed by the state monitoring chip. The invention further discloses a device with the computer system state monitoring method applied. According to the computer system state monitoring method and device, as the standard ACPI method is used on application software on a system layer and equipment at the bottom layer, transportability, compatibility and reliability of data transmission of the system state are improved.