59results about How to "Ensure system stability" patented technology

A system for predictive analysis of very large data sets using a distributed computational graph has been developed. Data receipt software receives streaming data from one or more sources. In a batch data pathway, data formalization software formats input data for storage. A batch event analysis server inspects stored data for trends, situations, or knowledge. Aggregated data is passed to message handler software. System sanity software receives status information from message handler and optimizes system performance. In the streaming pathway, transformation pipeline software manipulates the data stream, provides results back to the system, receives directives from the system sanity and retrain software.

The invention provides a reservoir optimal dispatching method coupling long, medium and short term runoff forecasting information. The method comprises the following steps: 1) analyzing and describing the randomness and the forecasting uncertainty of runoff; 2) constructing a reservoir optimal dispatching model coupling long, medium and short term runoff forecasting information, and determining a target function, a constraint condition and a recurrence equation of the reservoir optimal dispatching model; and 3) solving the constructed reservoir optimal dispatching model in combination with the recurrence equation. The method has the advantages that the runoff forecasting information of long, medium and short forecasting periods is coupled to hydropower dispatching, so that the uncertainty description is more reasonable, the treatment mode of forecasting the runoff is more effective, the use efficiency of uncertain information in reservoir dispatching can be improved, and the power generation benefit of a reservoir and the stability of a system are ensured.

The present invention relates to data packet traffic congestion solving mechanism in a node of a Radio Access Network (RAN), said mechanism is capable of blocking the transmission of data packets between a user terminal (UT) and said node in both uplink and downlink directions, if a created blocking table indicates for a scheduler that said user terminal has been determined to have been idle for more than a pre-determined time.

A lithographic apparatus including a position control system to control a position of a moveable object is presented, The position control system includes a position controller, an object represented as an object filter, a position feedback circuit, and an acceleration control system. The acceleration control system includes a subtractor and a first filter in a first circuit branch and a second filter in a second circuit branch. A position controller signal output from the position controller is input into the subtractor of the acceleration control system. An external disturbance force, however, is directly exerted upon the object. Thus, a first transfer function from the input of the subtractor to the acceleration of the object for the position controller force may be different than a second transfer function from the input of the object to the acceleration of the object for the disturbance force. Preferably, the first transfer function is identical to a transfer function for the position controller force in case no acceleration control system is present in the position control system.

The invention discloses a preparation method of higher fatty acid alkaline earth metal salt, which comprises the following steps: pre-mixing and dispersing fused higher fatty acid and micro-powdery alkaline earth metal oxide or hydrate, continuously feeding into a high-speed mixer capable of controlling the pre-mixing time together with a water solution containing a catalyst and a moistening agent, continuously outputting to a heat-insulation tank, keeping for a certain period of time at the proper temperature, and pulverizing to obtain a powdery higher fatty acid alkaline earth metal salt product. The preparation method has the advantages of simple process, simple equipment, mild reaction conditions, energy saving, and higher purity of the product.

The invention relates to an underground device for reaming while drilling. The underground device for reaming while drilling comprises an upper joint, a body and a lower joint. The upper joint is connected to the upper end of the body through a thread, the lower joint is connected to the lower end of the body through a thread, when a high-pressure drilling fluid enters the cavity between the upperend of an indexing mechanism and a lower piston b from a peripheral small hole formed in the lower portion of a central pipe, the indexing mechanism is started and moves downward under the pressure effect of the drilling fluid so that the drilling fluid can reach the lower end of an upper piston a from a peripheral small hole of the central pipe, push the upper piston a upward move and thus pusha tool blade to outwards rotate around a pin b, the tool blade is unfolded and then obtain an enough large torque under the rotating effect of a drill column, and accordingly reaming operation is performed. The underground device for reaming while drilling can perform reaming while drilling and improve the well drilling efficiency and is suitable for reaming operation carried out under the condition of well hole diameter reduction, well hole irregularity or narrow and small circumferential space of a lower casing pipe.

The invention discloses a low-frequency oscillation inhibition method of a high-speed train based on sliding mode control of an extended state observer. The method comprises the steps of constructinga state space model of a net side rectifier of the high-speed train, establishing the extended state observer on the state space model by taking load change as disturbance to obtain an estimated loadpower value, selecting an output of a control system by combining a control objective, establishing two sliding mode faces based on outer ring voltage control, obtaining a reactive component referencevalue of net side current by combining the estimated load power value, completing calculation of a sliding mode face expression, calculating a switching function, multiplying the switching function with direct current side voltage to obtain control voltage, transforming the control voltage into an alpha-beta coordinate system component, and outputting control pulse by sine pulse width modulation.The method takes all external disturbance as one state variable, so that the direct current side voltage can keep constant under sudden change of a load; the net side current can have a low total harmonic distortion rate; and the electric energy quality and the stability of a train net coupled system can be ensured.

The invention provides a solving method of breaking version control of a kernel module. Header information of an elf kernel module is corrected according to an environment of a to-be-loaded kernel module by adopting a particular realizing process comprising the steps: firstly, opening an elf document, mapping the elf document in a memory through an mmap, searching a function symbol table in a segment structure through an index, searching a field of '_ versions', wherein the field comprises values of a symbol table of all referencing functions, and enabling the module to be legalized through correcting a value in current kernel symvers. Compared with the prior art, the solving method of breaking the version control of the kernel module has the advantages of supporting a plurality of versions, breaking the limitation caused by kernel detection, breaking the limitation of the versions, and being strong in practicability, wide in application range and easy to popularize.

The invention belongs to the technical field of electronic processing, and particularly relates to a production method of electronic-grade glass fiber cloth. Defoaming is performed in the process of glass fiber preparation, joint action of an impregnating agent and surface chemical treatment agent is utilized, parameters during preparation are adjusted reasonably, and a method of combining pretreatment with aftertreatment is adopted, so that the electronic-grade glass fiber cloth produced by the method has high tensile strength and wear resistance, and mechanical performance, electrical performance and processability of a copper-clad plate are improved.

The invention discloses a method and a device for configuring carrier transmitting power. The method and the device are used for rationally distributing the transmitting power among the carriers to ensure performance of the system. The method comprises the step that: a network side device configures the maximum allowable transmitting power of a single antenna and a single carrier of each carrier based on a public transmission first principle according to a comparison result between the total transmitting power of a public transmission channel and the maximum allowable transmitting power of each carrier in the frequency band in the appointed time slot; therefore, the maximum allowable transmitting power of the single antenna and the single carrier of the carrier does not need to be dynamically adjusted according to the expected power when the carrier carries different services, and then the implementation complexity is reduced and system stability is guaranteed; besides, when parts of the antennas fail, as the maximum allowable transmitting power of the single antenna and the single carrier of each carrier is configured according to the public transmission first principle, the residual antenna ability can be maximally used, the utilization rate of the radio resources can be ensured, the covering area of cells can be prevented from being reduced to a maximum extent, and the system performance can be effectively ensured.

A method and a terminal for determining soft handover diversity thresholds are disclosed in the present invention. In the above method, at first, a terminal determines a dynamical addition threshold of a diversity corresponding to the terminal according to the first predetermined information, wherein the first predetermined information comprises: carrier-to-interference noise ratios CINRs of all the base stations in the diversity, and parameters carried in downlink channel description messages that are received from base stations by the terminal; then, the terminal determines a dynamical deletion threshold for each base station in the diversity according to the second predetermined information respectively, wherein, for each base station, the second predetermined information comprises: CINRs for base stations in the diversity whose CINRs are greater than the CINR of the base station, and parameters carried in downlink channel description messages. According to the technical solution disclosed in the present invention, a terminal can perform handover according to the current network condition, thereby the system stabilization can be ensured and the system efficiency can be improved.

The invention discloses a single-tuned filter and an optimal quality factor calculation method thereof. The single-tuned filter mainly comprises a capacitor C, an inductor L and a resistor R which are sequentially connected in series, wherein the other end of the capacitor C is connected with an alternating current voltage line; and the other end of the resistor R is grounded. The method comprises the following steps of: A, calculating the maximum equivalent frequency offset of a system; B, determining a maximum impedance angle of the system; and C, calculating an optimal quality factor of the filter. By the single-tuned filter and the method, the terminal voltage of the filter can be ensured to have a minimum value at characteristic frequency when the system has the maximum impedance angle, so filtering effects and system stability are ensured.

The invention discloses a vehicle-mounted photoelectric equipment dual-field-of-view rotation switching varifocal mechanism comprising a main framework (1). The mechanism also comprises a rotation varifocal frame (2), an upper rotation shaft (3), a lower rotation shaft (4), a motor driving device (5), a varifocal mirror group (6), a drive gear pair (7), a mechanical limiting device (8), a photoelectric sensor (9) and a locking device (10). Firstly the locking device (10) is released and then the motor driving device (5) drives the varifocal mirror group (6) to rotate to cut in and out throughgear driving. When the varifocal mirror group (6) is close to the target position, the photoelectric limiting device is started to emit a signal to control the motor to move at a low speed. The mechanical limiting device (8) is installed at the target point, and the locking device (10) is started when the motor reaches the target point. High precision of positioning and high stability of the system can be realized through the photoelectric switch, the electromagnet and the mechanical limiting switch so that the problems of large volume occupation and poor positioning stability of the conventional varifocal mechanism can be solved.

The invention discloses a water-based electromagnetic shielding coating material and a preparation method thereof, and belongs to the technical field of water-based coating preparation. A nano carbon material is endowed with water dispersibility by modifying the nano carbon material with polydopamine, the pH values of a polydopamine modified nano carbon material filler and a water-based anionic polyacrylate emulsion are respectively adjusted, and the polydopamine modified nano carbon material filler and the water-based anionic polyacrylate emulsion are blended, compounded and applied by coating to obtain the water-based electromagnetic shielding coating material with the mechanical property enhanced by adjusting the pH value. According to the method, the pH value of a formed film is adjusted, and the ionized phenolic hydroxyl group on the polydopamine is promoted to be protonated again by utilizing the natural reduction of the pH value during water evaporation, so that the interaction between the polydopamine modified nano carbon material and polyacrylate is induced to be converted from electrostatic repulsion to hydrogen-bond interaction, the contradiction between filler dispersity and interface interaction in the existing scheme is solved, and the mechanical property of the water-based electromagnetic shielding coating material is enhanced.

The present invention discloses a low-memory video frame rate adjusting method, relates to the field of video signal processing in the microelectronics design field, especially relates to a method for converting a source image frame frequency into a target image frame frequency under the condition of saving memory spaces, and aims to solve the technical problem of providing a video transmission method which saves memory spaces through strict sequential control and data storage delay without any image quality sacrifice and under the condition of ensuring system stability. Through strict sequential control and data storage delay and spatial calculation, the memory space is saved by half without any image quality sacrifice and under the condition of ensuring system stability.

The invention discloses a chained SVG control system and a chained SVG control method. The system comprises an inner ring control part and an outer control part, wherein the inner ring control part is composed of an AD data sampling module, an inner ring data conversion module, a current inner ring control module and a feedforward computing module connected in sequence, and controlled by a field-programmable gate array (FPGA); the outer ring control part is composed of an outer ring data reading module, an outer ring data conversion module connected with the outer ring data reading module, an outer ring control algorithm module connected with the outer ring data conversion module, and a phase-locked loop SPLL module, and controlled by a digital signal processor (DSP); the inner ring control part and the outer ring control part adopt DSP+FPGA heterogeneous multiprocessors for controlling in parallel, and the system performance is maximally enhanced.

The invention belongs to the technical field of computer processing, and particularly relates to a system-on-chip development environment building method and system, and the method comprises the steps: prefabricating a heterogeneous assembly for meeting an application demand on a system-on-chip according to the demands of an application field, and forming an assembly library; wherein a plurality of components used for operating a calculation processing algorithm are preset in each assembly; dividing tasks according to time before and after running, and selecting heterogeneous components corresponding to task requirements as a component running set; and allocating components of the components in the assembly running set to different resource nodes, and configuring corresponding logic unitsto generate a development environment template of the task. Core particles with the processing function serve as components in the development assembly, each PE unit can be achieved corresponding to one component, different assemblies are preset according to field requirements, the whole building process is convenient and fast, reuse of various assemblies is facilitated, the assemblies can be usedfor more flexibly meeting new application requirements, and the development efficiency is improved. Good application prospects are realized.