285 results about "System analysis" patented technology

A combiner box is used to collect direct current from solar panels or other energy sources. The combiner box integrates all means necessary for ground fault detection, current monitoring, voltage monitoring, and power monitoring. The combiner box may include a communication interface suitable for Web enabled monitoring, electronic notifications of system status, and / or remote control of system functions. In one embodiment, the combiner box uses integrated circuits and printed circuit board technology to achieve new efficiencies in manufacturing, installation and system analysis at the string level. A separate hand piece may be used by installers to test the performance of the combiner box, installation of the solar panels, performance of the solar panels and connections between the solar panels and the combiner box.

A method and apparatus for converting Direct Current (DC) to Alternating Current (AC). The method comprises performing system analysis on at least one of a DC current, DC voltage, or an AC voltage; utilizing the system analysis for selecting at least one conversion parameter; and converting DC to AC utilizing the at least one conversion parameter.

A method for reducing interference, comprising receiving a wideband signal, having at least one large amplitude component; adaptively modifying the wideband signal with respect to at least one high intensity component without substantial introduction of non-linear distortion, while reducing a residual dynamic range thereof; digitizing the modified wideband signal to capture information describing at least the high intensity signal at a sampling rate sufficient to extract modulated information present within the wideband signal at an upper limit of the band. The system analyzes a spectral characteristic of the wideband signal; and extracts adaptation parameters for the adaptive filtering. The system therefore provides both large net dynamic range and wideband operation. Preferably, the digitizer and filter, and part of the spectral characteristic analyzer is implemented in using superconducting circuit technology, with, for example low temperature superconducting digital signal processing components, and high temperature superconducting analog filtering components.

An arc fault detector system detects arcing faults in an electrical distribution system by monitoring one or more conductors and producing an input signal representing one or more electrical signal conditions in the circuit to be monitored. This input signal is processed to develop signals representing the electrical current flow through the monitored circuit and broadband noise signal components. The system analyzes these signals to determine whether an arcing fault is present, and if so, outputs a trip signal which may be used directly or indirectly to trip a circuit breaker or other circuit interruption device.

An arc fault detector system detects arcing faults in an electrical distribution system by monitoring one or more conductors and producing an input signal representing one or more electrical signal conditions in the circuit to be monitored. This input signal is processed to develop signals representing the electrical current flow through the monitored circuit and broadband noise signal components. The system analyzes these signals to determine whether an arcing fault is present, and if so, outputs a trip signal which may be used directly or indirectly to trip a circuit breaker or other circuit interruption device.

A method and apparatus for converting Direct Current (DC) to Alternating Current (AC). The method comprises performing system analysis on at least one of a DC current, DC voltage, or an AC voltage; utilizing the system analysis for selecting at least one conversion parameter; and converting DC to AC utilizing the at least one conversion parameter.

The present invention provides systems, methods, screens, reagents and kits for optical system analysis of cells to rapidly determine the distribution, environment, or activity of fluorescently labeled reporter molecules in cells for the purpose of screening large numbers of compounds for those that specifically affect neurite outgrowth.

The invention discloses a method for detecting frequency domain constant false alarm of a vehicle-mounted millimeter-wave anti-collision radar system, which belongs to the field of processing automotive anti-collision radar signals. The method comprises the following steps: when targets are located at the front of the anti-collision radar system, dividing the sampling data of the return signals which are pre-processed through a DSP (digital signal processor) module in the system into a frequency modulation ascending section and a frequency modulation descending section, and then storing the sampling data to an RAM (random access memory); conducting FFT (fast fourier transformation) template on the storage data, and then conducting the frequency domain constant false alarm detection on the obtained peak value points of a frequency spectrum based on order statistics, thus detecting the spectral lines of the effective targets from the signal frequency spectrum which contains noise waves; removing false targets by using the noise wave pairs; finally calculating the speed, the distance and the phase angle information of the targets according to the matched frequency spectrum information for analyzing and early warning of the system. According to the method in the invention, the false alarm rate of the detection of the anti-collision radar system is reduced effectively and the real time property and the effectiveness of the system are improved.

A vehicle system structure vibration and noise transmission path detecting system belongs to the technical field of automobile design. In the invention, a vehicle system analysis model building module builds incentive related bus, vehicle structure and acoustic cavity models and sets up a vehicle system analysis model; a vibration or noise response spectrum acquiring module acquires the vehicle structure vibration or passenger indoor structure noise response analysis; a transfer path power calculating module calculates the transfer power of all transfer paths and the total power transferred to the vehicle; a main transfer path detecting module calculates and orders the contribution of all the transfer paths, and identifies the main transfer paths; an optimized design module identifies the main influential factors for transfer of the power flow of the main transfer paths, applies an optimized design method to improve relevant bus characteristic parameters and structure types, and verifies the parameters in the vehicle system or the vibration absorbing and noise reducing effect after structure improvement. The vehicle system structure vibration and noise transmission path detecting system can improve the accuracy of transfer path identification and possibility of effective control to the transfer paths.

A method for reducing interference, comprising receiving a wideband signal, having at least one large amplitude component; adaptively modifying the wideband signal with respect to at least one high intensity component without substantial introduction of non-linear distortion, while reducing a residual dynamic range thereof; digitizing the modified wideband signal to capture information describing at least the high intensity signal at a sampling rate sufficient to extract modulated information present within the wideband signal at an upper limit of the band. The system analyzes a spectral characteristic of the wideband signal; and extracts adaptation parameters for the adaptive filtering. The system therefore provides both large net dynamic range and wideband operation. Preferably, the digitizer and filter, and part of the spectral characteristic analyzer is implemented in using superconducting circuit technology, with, for example low temperature superconducting digital signal processing components, and high temperature superconducting analog filtering components.

A method for providing data regarding a storage system comprising storage devices is described herein. A storage management module of an operating system of the storage system may be used for servicing (e.g., monitoring or testing) storage devices according to servicing parameters. For each serviced storage device, a reporting module of the storage management module may collect storage device and storage system data upon the occurrence of predetermined events (e.g., when a storage device exhibits an error and monitoring begins, when monitoring ends, and when testing of the storage device ends). The collected data may be saved to a report file in a predetermined format and received by a program configured to automatically extract the data according to the predetermined format for use in storage device and storage system analysis and to determine modified servicing parameters used by the storage management module to service storage devices.

A blood coagulation system analysis device capable of analyzing a blood coagulation system with high accuracy, and a method and a program for analysis of a blood coagulation system are proposed.The blood coagulation system is observed as a temporal change in permittivity before the viscoelasticity manifestation timing (timing at which blood starts to clot from the viewpoint of viscoelasticity (in greater detail, timing at which active polymerization of fibrin monomers starts)). A permittivity of blood which is positioned between a pair of electrodes is measured at predetermined time intervals after the anticoagulant effect acting on the blood is ended, and from the measurement result, a degree of the action of the blood coagulation system is analyzed.

The invention relates to a method for detecting and positioning the leakage of an oil-gas pipeline by utilizing an autonomous navigation robot. The method comprises a robot pipeline line-tracking detection method and a terminal computer detection positioning method; marking lines and correcting nodes are painted on the road surface near the pipeline along the axial direction of the pipeline; the robot navigation system adopts the photoelectric coding and correcting node identification method for navigation and line-tracking detection; a data acquisition combiner is formed by an ultrasonic sensor and a smell sensor to acquire a signal of the oil-gas pipeline, the signal passes an amplifying-filtering circuit and a control module, undergoes analog / digital conversion, modulated by a wireless communication module and sent to the computer; analytic software of the system adopts an algorithm combining the adaptive fuzzy noise detection smoothing algorithm and the multi-scale Gaussian filter algorithm to process data of ultrasonic strength and gas strength; and when the two signals are received at the same time and both higher than the threshold values, the leakage of the pipeline can be determined, and the alarm rings and the leakage can be positioned. The method is applicable for the line-tracking detection and leakage positioning of the oil-gas pipeline in an underground comprehensive pipe ditch.

The present invention provides systems, methods, screens, reagents and kits for optical system analysis of cells to rapidly determine the distribution, environment, or activity of fluorescently labeled reporter molecules in cells for the purpose of screening large numbers of compounds for those that specifically affect particular biological functions.

The invention relates to a large-grid wide-area asynchronous control method, which belongs to the field of emergency control of power systems. The method comprises the following steps of (1): real-time state computation of a main network frame of a wide area measurement system (WAMS)-based power grid, which is to eliminate the false and retain the truth through data pre-treatment, inhibit or eliminate noises to the largest extent, and highlight the useful information of the wide area measurement system in a grid dynamic process to provide characteristic quantity for stable analysis and control; (2) real-time analysis of stability of grid power angle, which is to detect and predict asynchronous process of the system based on the synchronous phasor of the integral main power grid by combining a system analysis method, and find out an asynchronous section in space; and (3) presentation of a coordinate control strategy for asynchronous disconnection, which is to present a backup disconnection control measure when the asynchronous section deviates to the section which is not controlled by disconnection and guarantee reliable disconnection when the large-grid becomes asynchronous. According to the method, a WAMS-based wide area asynchronous emergency control is provided, the running state of the power system can be monitored and controlled in real time, possible power angle instability of the power system can be predicted, the chain reactions of large-grid resistance is guaranteed, and influences of grid accidents on national economy and people's live are avoided.

Embodiments of a system that determines a condition associated with an integrated circuit disposed on a circuit board are described. During operation, the system receives electromagnetic-interference (EMI) signals from one or more antennas while the integrated circuit is operating, where the one or more antennas are disposed on the circuit board. Then, the system analyzes the received EMI signals to determine the condition.

A converter station insulating co-operating design method of a high-pressure direct-current power transmission system belongs to a high-pressure direct-current power transmission system analyzing method, and aims at simplifying calculating working capacity, avoiding excessive man-made interference, and guiding users to highly-effectively finish insulating co-operating analysis. The converter station insulating co-operating design method comprises the lightning arrester configuration step, the system analysis step and the insulating co-operating step. The converter station insulating co-operating design method greatly simplifies the calculating working capacity of insulating co-operating analysis, avoids excessive man-made interference factors of users, and guides users to highly-effectively finish insulating co-operating analysis through a guiding mode.

A pacing system analyzer (PSA) having three or more individually controllable sensing and pacing channels provides for testing and measurement during an operation for implanting a pacemaker having three or more sensing and pacing channels. The PSA allows control and adjustment of pacing parameters including cross-channel pacing parameters relating activities between any two of the three or more channels, such as atrioventricular and interventricular pacing delays. The PSA is also capable of, among other things, displaying real-time cardiac signals, measuring amplitude and slew rate of cardiac depolarizations, and measuring lead impedance for each of the sensing and pacing channels, as well as measuring time intervals between cardiac depolarizations in two different sensing and pacing channels. In one embodiment, the PSA includes individually controllable atrial, right ventricular (RV), and left ventricular (LV) sensing and pacing channels.

A system for analyzing the operation of a switching power converter includes a digital controller for receiving an analog signal representing the output DC voltage of the power converter for comparison to a desired output voltage level and generating switching control signals to control the operation of the power supply to regulate the output DC voltage to said output voltage level. At least one portion of a control loop within the digital controller may be switched into the control loop in a first mode of operation and out of the control loop in a second mode of operation. A microcontroller emulates the operation of the at least one portion of the control loop during the second mode of operation.

In certain embodiments, a method samples a body fluid of a patient. The method includes providing a fluid handling system having one or more fluid passageways. The method further includes infusing an infusion fluid by way of a fluid handling system into a patient through one or more fluid passageways. The method further includes obtaining a sample of body fluid by way of a fluid handling system from a patient through one or more fluid passageways. The obtained sample is no more than 400 microliters in volume. The method further includes analyzing at least an analyzed portion of the obtained sample by way of an analyte detection system operatively associated with the fluid handling system to determine a concentration of at least one analyte.

The invention discloses a neutral network theory-based non-linear system adaptive proportional integral control method. The method comprises the following steps: in a first step, a mathematical model for a non-linear system is built; in a second step, a smooth function is used for approximating a non-smooth performer saturation function; in a third step, a neutral network adaptive proportional plus integral controller is designed for control. According to the method disclosed in the invention, as for a non-linear system with input saturation, the smooth function is used for approximating the performer saturation function, a BLF is referenced, that neutral network input is maintained in a bounded compact set range can be ensured, and normal operation of a neutral network can be ensured; compared with a conventional PI gain adjustment, an adjustment method put forward in the invention is advantageous in that 1) proportion integral gain of the PI controller is not a fixed constant but a time variant; 2) proportional gain and integral gain are not designed individually but associated with each other via a certain coefficient, and therefore system analysis can be facilitated; 3) the method has certain robustness for nondeterminacy and input saturation of the system.

The invention discloses a kilowatt-level ship energy system test platform based on composite energy combined grid power generation. The kilowatt-level ship energy system test platform based on the composite energy combined grid power generation comprises a main distribution board, a composite energy combined grid power generation device, a left spiral distribution board and a right spiral distribution board, wherein the composite energy combined grid power generation device, the left spiral distribution board and the right spiral distribution board are respectively connected with the main distribution board. The test platform further comprises an intelligent comprehensive management system which conducts optimizing configuration of the composite energy operation process, system analysis and monitoring, safety control, analog simulation and asset appraisal of a whole life circle of power generation, distribution, transformation and utilization of the whole system test platform. The composite energy combined grid power generation device comprises a dual-fuel power generation unit, an LNG gas turbine generation unit, a photovoltaic combined grid power generation device, a wind power combined grid power generation device, a fuel battery combined grid power generation device, a shore connection box, an energy feedback power generation unit, a sail simulating auxiliary pushing device and a power pushing device, wherein the dual-fuel power generation unit, the LNG gas turbine generation unit, the photovoltaic combined grid power generation device, the wind power combined grid power generation device, the fuel battery combined grid power generation device, the shore connection box, the energy feedback power generation unit, the sail simulating auxiliary pushing device and the power pushing device are respectively connected with the intelligent comprehensive management system. The intelligent comprehensive management system serves as a center and various types of clean energy application technologies are integrated.

The invention provides an analysis method of a transmission line wind-ice coupling load line breakage effect. The analysis method includes the following steps that 1, geometric parameters and physical parameters of a transmission tower line system are determined, and a transmission tower line system analysis model is established; 2, icing loads of the transmission tower line system are determined; 3, a non-linear analysis method of a transmission tower line system reaction under the effect of the icing loads is established; 4, a wind load model in which the wire icing thickness changes is established; 5, a dynamic analysis method that a transmission wire is broken under the effect of wind-ice coupling loads is established, and the dynamic effect of transmission line icing line breakage is analyzed and calculated. According to the method, the coupling effect of the icing loads and wind loads is considered at the same time, the analysis formula is displayed and expressed, the calculation speed is high, the calculation amount is small, and the defects of existing traditional methods can be effectively overcome. The method is suitable for analysis and calculation of the icing line breakage effect of various transmission tower line systems with different spans and sags under the effect of the ice-wind coupling loads.

There is provided a blood coagulation system analyzer, including a measurement section and an analysis section. The measurement section measures a time change of impedance of a blood sample, which is obtainable by applying an alternating electric field to the blood sample. The analysis section extracts a parameter indicating the characteristics of the impedance from the measured data of the time change of the impedance. Furthermore, the analysis section analyzes a degree of enhancement of blood coagulation on the basis of a comparison of the extracted parameter with at least one reference value which defines the criteria of the enhancement of blood coagulation.

The invention discloses an insulative matching method for an intelligent power distribution system based on a flexible direct current. The topological structure, the mode of operation and the mode of malfunctions of the intelligent power distribution system based on the flexible direct current are comprehensively analyzed by the following steps: carrying out system analysis; configuring a lightning arrestor; carrying out simulating calculation of an overvoltage; setting insulative match. On the basis, the lightning arrestor is initially configured for the system and simulating calculation of overvoltage is conducted by establishing an inner overvoltage calculation model and a lightning overvoltage calculation model of the system so as to adjust the configuration of the lightning arrestor and the accomplish insulative match of equipment of the system, so that the system cost is the minimum while the system safely and stably operates. The scheme can be used for guiding related technical staff to efficiently carrying out insulative match analysis of a flexible direct current power distribution system.

The invention, which belongs to the field of precise modeling and control optimization of the hydro electric generating set of the power system, discloses a fuzzy fractional order PID control method for a speed regulating system of a pump storage group. On the basis of a fractional calculus and a fuzzy control theory, a fuzzy fractional order PID controller for a pump storage group is established; modeling of a speed regulating system of the pump storage group is carried out, wherein a regulator model, an approximate elastic water hammer model of a conduit system, a total-characteristic-curve-based pump turbine model, and a generator and load model are established; and then a controller parameter is optimized by using a provided parallel gravitation searching algorithm. According to the control method, requirements of hydroelectric energy system simulation, power system analysis, and optimized pump storage group control can be met to the greatest extent.

The invention relates to a method for calculating the voltage fluctuation of power grid caused by rail traction shock load. The method is performed by applying a Power System Analysis Synthesis Package (PSASP) and comprises the following steps: 1) determining a load value on the high-voltage side of a traction station before a locomotive is started, inputting the load value into a power grid model for load flow calculation, and using a load flow calculation result as a basic load flow for transient stability calculation; 2) calculating reactive shock load values on the high-voltage side respectively when two locomotives on two arms of a traction transformer are started; and 3) applying the PSASP, stimulating reactive shock at a bus on the high-voltage side of the traction station and calculating the voltage fluctuation of a PPC point. The method has great significance for reducing the influence of the traction load on power grid shock and improving the power quality of a power system and the operating safety and stability of the power grid.

The invention discloses a road network traffic improvement scheme efficiency assessment method based on data envelopment analysis. Step one: an assessment index is quantified and acquired and preliminary road network improvement alternative schemes are formed; step two: the road network improvement alternative schemes are selected; that is to say, the road network improvement alternative schemes are effectively sequenced based on data envelopment analysis; and an optimal road network improvement scheme is obtained. Road network operation efficiency is assessed via adopting a "more input more output" system analysis idea by aiming at multiple schemes for road network updating. A road network operation efficiency assessment index system is established based on principles of representativeness, objectivity and availability. Besides, the assessment index is divided into an "input" type index and an "output" type index, and an assessment model of road network operation efficiency is established by applying data envelopment analysis (DEA). Calculation is performed by adopting a C2R model in the DEA method so that relative effectiveness and relative efficiency values among all the road network updating schemes are obtained and effectiveness sequencing of all the schemes is obtained.

The invention discloses a method for evaluating the insulation performance of a power cable in a stage with the voltage being 35kV or below 35kV. The method comprises the steps of determining the power cable which is in need of carrying out insulation performance evaluation and planning to carry out power failure detection on a section of cable circuit by combining with an overhaul plan of electrical devices which are connected with the power cable; disconnecting the section of the cable circuit with the electrical devices at two ends and ensuring a safe distance between the section of the cable circuit and adjacent electrical devices; applying oscillation wave voltage to a tested cable through a dedicated detection device and carrying out local discharge detection on the cable circuit; carrying out system analysis on a local discharge detection result by comparing a cable path and a position laying situation of an intermediate joint; meanwhile, carrying out effective evaluation on the insulation performance of the cable circuit by combining the size and the generation position of local discharge capacity of the cable circuit. According to the method disclosed by the invention, effective evaluation is carried out by carrying out the oscillation wave local discharge detection, safe and reliable running of a power grid is ensured, and the problem that a method for accurately mastering the insulation performance of the power cable in the stage with the voltage being 35kV and below 35kV is lack at present can be better solved.

The invention discloses a new energy power generation system and a distributed mixing maximum power tracking method. When the system operates, a DC-DC converter and a rear-end centralized converter respectively perform MPPT on the output power difference portion of a single new energy power generating device and the output power of a whole new energy power generation system, at the same time, the DC-DC converter can directly merge the power difference portion of the single new energy power generating device into a rear-end DC bus, and through the mutual coordination and cooperation of two MPPT functions, the whole new energy power generation system reaches maximum power output. According to the invention, the maximum power output of each new energy power generating device in the system can be realized, accurate monitoring of output power can be provided, and precision data is provided for system analysis so that the system can adjust control strategies to improve system generating efficiency, and rapid positioning of problematic assemblies is facilitated.