829results about How to "Improve system stability" patented technology

The present invention relates to a data storage method, device and system and a management server. The data storage method includes: constituting a data pool from all of n data storage devices; when there is data for storage, polling all the devices in the data pool to select a group of m devices, and storing the data onto each of the selected group of m devices, where m is larger than one and smaller than n. The embodiments of the invention can address the problems of an existing data storage approach that a failing node causes an increased load on and instability of another node and that each node in the existing data storage approach has a low utilization ratio and poor predictability, so as to achieve uniform loads on the devices and high reliability of the nodes despite any failing node and improve the resource utilization ratio and predictability of the nodes.

The invention provides a method and system for operating a solar farm inverter as a Flexible AC Transmission System (FACTS) device—a STATCOM—for voltage control. The solar farm inverter can provide voltage regulation, damping enhancement, stability improvement and other benefits provided by FACTS devices. In one embodiment, the solar farm operating as a STATCOM at night is employed to increase the connectivity of neighbouring wind farms that produce peak power at night due to high winds, but are unable to connect due to voltage regulation issues. The present invention can also operate during the day because there remains inverter capacity after real power export by the solar farm. Additional auxiliary controllers are incorporated in the solar farm inverter to enhance damping and stability, and provide other benefits provided by FACTS devices.

Proposed is an automated telematics-based system (1) for score-driven operations associated with motor vehicles (41, . . . , 45) or transportation means of passengers or goods and based on a dynamic, telematics-based data aggregation, and method thereof, for automated risk-transfer related to complex peer-to-peer lending schemes, especially related to vehicles and car sharing schemes and sharing economy transportation schemes related to risks associated with damages to third parties. The telematics-based system (1) comprises telematics devices (411, . . . , 415) associated with the plurality of motor vehicles (41, . . . , 45), wherein the telematics devices (411, . . . , 415) comprise a wireless connection (42101-42108) to a central, expert-system-based circuit (11). The telematics devices (411, . . . , 415) are connected via interfaces (421, . . . , 425) to the sensors and/or measuring devices (401, . . . , 405) and/or an on-board diagnostic system (431, . . . , 435) and/or an in-car interactive device (441, . . . , 445), wherein the telematics devices (411, . . . , 415) capture usage-based (31) and/or user-based (32) and/or operational (33) telematics data (3) of the motor vehicle (41, . . . , 45) and/or user (321, 322, 323). In response to an emitted shadow request (109) individualized risk-transfer profiles (114) based upon the dynamically generated variable scoring parameters (1011, . . . , 1013) are transmitted from a first risk-transfer systems (11) to the corresponding motor vehicle (41, . . . , 45) and issued by means of a user unit (461, . . . , 465) of the motor vehicle (41, . . . , 45) for selection by the driver of the motor vehicles (41, . . . , 45). In return of issuing an individualized risk-transfer profile (114) over said user unit (461, . . . , 465), payment-transfer parameters are transmitted from the first risk-transfer system (11) to the provider of the telematics-based system (1).

The invention discloses a voiceprint identification method based on multi-type combination characteristic parameters, and the method comprises the following steps: the collecting and inputting of voice signals; the preprocessing of voice signals; the extracting of combination characteristic parameters of the voice signals: the extracting of a multi-dimensional feature vector of MFCC, LPCC, delta MFCC, delta LPCC, energy, first difference of energy and GFCC characteristic parameters; the screening of the multi-dimensional feature parameters through a genetic algorithm; the obtaining a voice model of a speaker through the introduction of a universal background model UBM; and the recognition of test voice through a GMM-UBM model at last. Compared with a voiceprint identification method for single voice signal characteristic parameter, the method effectively improves the recognition accuracy and system stability of voiceprint recognition.

Proposed is a mobile automotive car system, and method thereof, for a dynamic, telematics-based connection search engine and telematics data aggregator, wherein risk-transfer profiles are captured and categorized in a results list from a plurality of first risk-transfer systems based on dynamically generated driving score parameters by means of appropriately triggered automotive data. As a variant, during a predefined trial period, the automotive and driving behavior data can be collected, which are transmitted together with the generated driving score parameters to multiple automated first risk-transfer systems for quotation. The user is able to dynamically select the best-fitting first risk-transfer system for risk-transfer by means of the results list, which is provided and updated in real-time for display to and selection by a user of a mobile telecommunication apparatus by means of a mobile telematics application of the mobile telecommunications apparatus.

The invention relates to a quick client development frame for a manufacturing execution system and a software development method for the frame. The frame comprises a client layer and a service layer, wherein the client layer is used for realizing client interface interaction and comprises an interface view layer, an interface model layer and a model; and the service layer is used for realizing a business logic and data storage, receiving data sent by a client, reconstructing the data of the client according to a business requirement and sending the data to a database. The software development method for the frame comprises the steps of determining a data structure and the business logic of a development page as needed; designing UML class graph automatic generation codes; adding the codes into corresponding layers of project engineering in sequence; and compiling the project engineering to generate system software. According to the frame and the method, the code writing workload of the manufacturing execution system can be greatly reduced and the code quality and the system stability can be improved; and meanwhile, by applying a layered architecture and a configuration file, the software generated by the frame can be conveniently transplanted in different database systems.

The invention provides an optical-fiber low-coherence interference displacement demodulation device and method based on a photoelectric oscillator. A first optical fiber coupler, an adjustable light delayer and a second optical fiber coupler form a Mach-Zehnder interferometer structure, and broadband low-coherence light generates an interference light field for output through the Mach-Zehnder interferometer structure. An electrooptical modulator, an optical fiber, a photoelectric detector, a radio-frequency amplifier and a radio frequency beam splitter form the photoelectric oscillator, and the photoelectric oscillator enables the inputted interference light field to be converted into a radio signal with high spectrum purity for output. The displacement change of a position device is obtained through the measurement of the frequency value of the radio frequency signal, thereby achieving the demodulation of the low-coherence interference displacement. The method provided by the invention can be used for the high-precision detection of displacement, or for other sensors to carry out the demodulation of stress, temperature, thickness, group index of refraction and pressure into displacement.

The invention relates to the field of the electric system technology, in particular to a net rack optimization method for a multi-direct-current centralized fed receiving end power grid. According to the method, the network voltage supporting capacity of the receiving end power grid, the short-circuit current control effect of the receiving end power grid and the short-circuit current control measure cost of the receiving end power grid are all considered. The method includes the steps of taking the maximum multi-direct-current feeding comprehensive short-circuit ratio, the maximum short-circuit capacity comprehensive margin and the minimum total cost of investment of current limiting measures as three objective functions, building a multi-objective optimized mathematical model which includes the three objective functions and power grid constraint conditions, and utilizing an NSGA-II multi-objective genetic algorithm to carry out the multi-objective optimization method. A result provided through the method is a line unlocking or series reactor added combining scheme, and the power grid can have strong voltage supporting capacity and system stability on the basis of controlling of a short-circuit current through moderate cost. The method has strong adaptability to an existing receiving end power grid optimization scheme.

In a Wavelength-Division-Multiplexed Passive Optical Network (WDM-PON) utilizing a conventional downstream optical signal reusing method, there is an inventory problem that different optical transmitter types need to be provided for the operation, management, replacement, etc. of a system. A WDM-PON system according to the present invention, includes: a seed light (SL) unit generating a seed light whose wavelength intervals and center wavelengths are adjusted using at least one seed light source; an optical line terminal (OLT) receiving the wavelength-multiplexed seed light from the seed light unit, transmitting a downstream optical signal to a subscriber of the WDM-PON, and receiving a upstream optical signal from the subscriber; and an optical network unit (ONU) receiving the downstream optical signal from the OLT, flattening and modulating the downstream optical signal with upstream data so that the downstream optical signal is reused for carrying upstream data. It is possible to improve the quality and reliability of downstream transmission by sufficiently increasing an extinction ratio, and improve the quality and reliability of upstream transmission by sufficiently flattening an input downstream optical signal in a semiconductor optical amplifier.

Embodiments of the invention provide a single base station-based positioning system and method. The system comprises a base station and a label, wherein the base station comprises a positioning moduleand array antennas; the positioning module is connected with the array antennas; the label is used for receiving and transmitting wireless signals so as to realize information interaction with the base station; the array antennas are used for obtaining measurement distances from the label to the array antennas and signal phases according to a distance measurement and phase measurement algorithm;the quantity of the array antennas is greater than or equal to 2; the positions of the array antennas are non-collinear; the distances between adjacent array antennas are preset values; and the positioning module is used for obtaining angle information of the label relative to the base station according to the signal phases on the basis of a given error criterion and obtaining a position of the label relative to the base station according to the angle information and the measurement distances. According to the single base station-based positioning system and method, positioning can be realizedby using a single base station and a plurality of antennas, so that the scale and cost of the system are reduced, and the positioning precision, positioning speed and system stability are improved.

The invention relates to a polarization-controlled encoding method, encoder and quantum key distribution system, which is characterized in that polarization maintaining light path or 90 degree rotation Faraday mirror are used inside the encoder to keep the polarization of the output pulses same, and that in the quantum key distribution system employing the polarization-controlled encoder the pulse emitted from transmitter is unidirectional-transmitted to receiver and then quantum key distribution is implemented using interference in the pulses according to the quantum key distribution protocol. The quantum key distribution system using the polarization-controlled encoder of the invention has the ability of avoiding the wiretapping to transmitter, receiver and quantum channel. Detection units each of which separates reversed photon from other photons are added at the out port of the transmitter and the in port of receiver, respectively, so that Trojan horse is prevented from entering and photons with phase modulated information are prevented from leaving the safe area in receiver. Unconditionally safe key distribution can be accomplished by using the quantum key distribution system of the invention.

An X-ray imaging system comprising: an X-ray source, a source grating, a fixed grating module and an X-ray detector, which are successively positioned in the propagation direction of X-ray; an object to be detected is positioned between the source grating and the fixed gating module; said source grating can perform stepping movement in a direction perpendicular to the optical path and grating stripes; wherein the system further comprises a computer workstation for controlling said X-ray source, source grating and X-ray detector so as to perform the following processes: the source grating performs stepping movement in at least one period thereof; at each stepping step, the X-ray source emits X-ray to the object to be detected, and the detector receives the X-ray at the same time; wherein after at least one period of stepping and data acquisition, the light intensity of X-ray at each pixel point on the detector is represented as a light intensity curve; the light intensity curve at each pixel point on the detector is compared with a light intensity curve in the absence of the object to be detected, a pixel value of each pixel point is calculated from change in said light intensity curve; an image of the detected object is reconstructed according to the calculated pixel value.

An impulse driving method and apparatus thereof for a liquid crystal display (LCD) are provided. The gate driver of the liquid crystal device generates first scan signals for controlling gate lines of the liquid crystal device according to the received first start vertical signal and first output enable signal. The scan signals are generated corresponding to the pixel data signals outputted from the data driver of the LCD. Moreover, the gate driver of the LCD generates second scan signals according to the received second start vertical signal and second output enable signals. The scan signals are generated corresponding to black data signals output from the data driver of the liquid crystal device. Therefore, the control signal scheme is simplified and the black insertion ratio is easily controlled.

Systems and methods are provided for deploying new software application features as a dynamically-loadable executable package including one or more dynamically-linked shared dependent libraries. The dynamically-loadable executable package may be capable of being loaded into volatile memory and executed in an information handling system environment with or without the dependent shared libraries, and without duplicating the presence or use of redundant shared libraries that may be already present on the existing software stack.

The present invention discloses a self-compacting concrete for CRTS III plate-type ballastless track filling layer. The concrete is prepared from the following raw materials in parts by weight: 270-350 parts of cement, 0-130 parts of coal fly ash, 0-120 parts of mineral powder, 20-50 parts of an expanding agent, 790-900 parts of fine aggregate, 750-900 parts of continuous gradation coarse aggregate, 20-40 parts specific viscosity modified materials, 5.5-8.5 parts of a specific sustained release controllable polycarboxylic acid water reducing agent and 165-180 parts of water. According to the invention, the specific viscosity modified materials and specific sustained release controllable polycarboxylic acid water reducing agent are used in combination to prepare the specific self-compacting concrete for filling layer with good flowability, strong volume stability, low sensitivity for water consumption, small thixotropic time change, low shrinkage and good longevity, thereby reducing theconstruction difficulty of the CRTS III plate-type filling layer and prolonging the sevice life of the ballastless track structure.

The invention relates to a primary side feedback (FB) switching power supply controller and a switching power supply system. The switching power supply system comprises a transformer, a voltage-dividing circuit, a main switch tube, an output circuit and the primary side FB switching power supply controller, wherein the voltage-dividing circuit is connected to the transformer; the power supply endof the primary side FB switching power supply controller is connected with the primary side first input end of the transformer; the FB control end of the primary side FB switching power supply controller is connected to the voltage-dividing point of the voltage-dividing circuit; the input end of the primary side FB switching power supply controller is connected with the grid of the main switch tube; the control end of the primary side FB switching power supply controller is connected to the source of the main switch tube; and the primary side FB switching power supply controller comprises an FB waveform detection module, a triangular wave generating circuit, a first comparer, a narrow pulse generating circuit, a second comparer and an RS (Reset-Set) trigger. Due to the implementation of the primary side FB switching power supply controller and the switching power supply system, provided by the invention, the system stability can be effectively improved, the complexity of a peripheral system can be lowered, the quantity of peripheral elements can be reduced, and the cost of a product can be reduced.

The invention provides a Delta-Sigma modulation principle based digital switching device and method for a rotary transformer, which belongs to the technical field of digital switching of a rotary transformer output signal, and solves the current problems of digitally converting an analog signal outputted by the rotary transformer by means of calculation with a specialized chip and the high cost. The device comprises a rotary transformer, and also includes a low pass filter, a carrier wave generator, a Delta-Sigma modulator, a sine channel unit, a cosine channel unit and a closed loop angle tracker. The method includes the steps of converting the analog signal returned by the rotary transformer to a digital signal based on the Delta-Sigma A/D converter with an oversampling principle, wherein the digital signal has a delay correcting function, multiplying the digital signal being sampled and filtered with a delay marking signal to compensate the whole system, calculating the inputted signal by the closed loop angle tracker, and obtaining an angle signal and an angular speed signal of the motor measured by the rotary transformer. The device and the method provided by the invention are suitable for the digital conversion of the signals outputted by the rotary transformer.

The invention relates to a method for processing sludge and kitchen wastes. The method comprises the following steps: by utilizing sludge and kitchen wastes as principal raw materials; separating waste oil from kitchen wastes to be taken as the raw material of fuel or bioplastics; taking biological fuel gas, which takes methane as main material and is generated through fermentation, as an external fuel supply; absorbing the nutrient in biogas slurry by the charcoal generated through pyrolysis and then taking the charcoal as a charcoal fertilizer. The method for processing sludge and kitchen wastes provided by the invention meets the increasingly urgent requirement of processing the sludge and kitchen wastes in China at present; the method can be used for efficiently solving the problems of separately processing sludge and kitchen wastes; the classification and valuable utilization of by-products are realized; various by-products are low-carbon high-efficient cleanly utilized; the purposes of best use, energy conservation, environment protection and cost lowering are achieved; the method has excellent economic benefit and environmental benefit.

The invention discloses an inertia stabilizing device based on acceleration feedback and feed-forward and a control method thereof. The inertia stabilizing device comprises an accelerometer, a gyroscope, a turntable, a base and a servo controller. The feedback and feed-forward combined control is adopted in the control method. The control method comprises the following steps that a feedback stabilizing loop includes an internal acceleration loop and an external gyroscope loop, wherein an acceleration feedback signal is measured by the accelerometer; an acceleration feed-forward signal is supplied by the accelerometer mounted on the base, and the acceleration feed-forward signal passes through a low-pass filter and is guided to a node for the acceleration feedback input. The inertia stabilizing device has the advantages of simple structure, excellent robustness and high stabilization and is beneficial to engineering realization.