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2347results about How to "Reliable method" patented technology

Method and apparatus for analyzing time series data

The present invention relates to a method and an apparatus for determining which one or more time series parameters of a plurality of time series parameters relating to operation of a system are correlated with a first operation state of the system. According to the invention, the method comprises providing time series data including data relating to a time series of each of the plurality of time series parameters; determining at least two first time periods, wherein the system is in the first operation state during the at least two first time periods; determining at least one second time period, wherein the system is in a second operation state during the at least one second time period; determining, for each respective time series parameter of the plurality of time series parameters, a first characteristic parameter relating to a first characteristic of the time series of the respective time series parameter for each of the at least two first time periods and the at least one second time period; and determining which one or more time series parameters of the plurality of time series parameters relating to the operation of the system are correlated with the first operation state of the system by determining, for each respective time series parameter of the plurality of time series parameters, whether or not the respective time series parameter is correlated with the first operation state of the system based on the first characteristic parameters of the respective time series parameter determined for each of the at least two first time periods and the at least one second time period.
Owner:EUROPEAN SPACE AGENCY

Method for releasing pressure and removing danger of rock burst

The invention relates to a method for releasing pressure and removing danger of rock burst. The effects of releasing pressure and removing danger of rock burst and ensuring the safety of a coal mine can be effectively realized. The method comprises the following steps of: releasing pressure and bursting a coal bed; because of higher inner stress in the coal bed, drilling a roadway wall to form a free space, so that the stress is re-distributed; drilling to enable pressure and water solution to enter a coal body and increase water content; bursting a top plate of the coal bed; bursting a bottom plate of the coal bed; through high pressure, filling fracturing fluid into cracks and slots which are formed in the coal body before fracturing and after fracturing; expanding, extending and dredging the cracks; increasing the slots of the coal bed; changing the magnitude and the direction of the stress on the coal body; transmitting the stress to the deep part of a coal-rock mass; and selecting the safe coal bed or coal body to exploit, wherein after a goaf area and a natural caving arch are formed, an unloading effect is achieved, the rock burst and roof collapse are prevented or relieved. The method is stable and reliable, good in pressure-releasing and danger-removing effects, and high in economic and social benefits, prevention and control on the rock burst are realized, and the safe production of the coal mine is effectively protected.
Owner:HENAN DAYOU ENERGY

Network threat evaluation method based on multi-granularity anomaly detection

The invention relates to a network threat evaluation method based on multi-granularity anomaly detection, and can effectively solve the problem that the existing threat situation evaluation technology based on a network data packet or a network flow cannot be well suitable for rapidly and accurately identifying an attack event and perceiving a threat situation in a high-speed network environment. The network threat evaluation method comprises the following steps: analyzing a time slice including an abnormal network flow by utilizing a packet-based coarse granularity anomaly detection; performing flow reassembly of the network flow of the abnormal time slice and extracting a flow characteristic attribute through flow-based fine granularity anomaly detection, and judging the attack type by utilizing a flow characteristic anomaly detection algorithm; and finally, quantifying and evaluating the serious degree of the threat event in a current network according to the detected threat event. The method disclosed by the invention is easy to operate and can detect the serious degree of the threat event subjected by the network precisely in real time; network workers can easily know the security threat subjected by the current network in time; and effectively emergency response measures can be taken in time.
Owner:THE PLA INFORMATION ENG UNIV

Failure line selection method of small current ground system by using simulation after zero mode current measure

InactiveCN101242097AOvercome the influence of small fault transient currentRealize correct line selectionEmergency protective circuit arrangementsCapacitanceEngineering
The invention provides a fault route-selecting method by using small current grounding system simulated by measured zero-mode current. The method includes following steps: when a generatrix zero-mode voltage instantaneous value is over the limit, a fault route-selecting is started and recorded immediately; zero-phase shift digital wave filter is used to obtain a high-frequency transient weight of each feed line zero-mode current; orderly the feed line is supposed to be fault feed line, the rest of the high-frequency transient weight of the feed line zero-mode current is quantificationally solved by using the measured simulative method according to the supposed high-frequency transient weight of the feed line zero-mode current and each feed line zero-order distributing capacitance parameter; the actual-measured wave shape and simulative wave shape of the high-frequency transient weight of the feed line zero-mode current are analyzed and a average relative coefficient of the actual-measured wave shape and simulative wave shape of the high-frequency transient weight of the feed line zero-mode current are solved, the route-selecting criterion is formed to achieve the fault route selection. The principle analysis and simulation indicate that route selection of this method is accurate and reliable.
Owner:KUNMING UNIV OF SCI & TECH

Method for screening traditional Chinese medicine effect related ingredients and model building method

The invention discloses a method for screening traditional Chinese medicine effect related ingredients and a model building method. The method comprises the steps as follows: taking the researched traditional Chinese medicines as objects for preparing multiple sets of sample solutions containing chemical components with different concentrations; selecting part of the chemical components for HPLC (High Performance Liquid Chromatography) analysis, and investigating linear relations between the peak areas and the concentrations; selecting the multiple sets of sample solutions in the linear range, and determining the respective HPLC fingerprint spectrums and the medicine effect indexes of the sample solutions; and obtaining relations between the peak areas and the medicine effect indexes of the ingredients by adopting a linear regression analysis method in the linear relation range, and confirming the actions of the medicine effect related ingredients on the medicine effect indexes according to the positive value and the negative value of the standard regression coefficients and/or the t check results of the ingredients so as to screen out the traditional Chinese medicine effect related ingredients. The method is simple, convenient, easy to implement, reliable and good in commonality, can embody the characteristics of comprehensive actions of the multiple ingredients on the medicine effect indexes, is suitable for screening the traditional Chinese medicine effect related ingredients, and provides a technical data support for discovering and screening traditional Chinese medicine active ingredients.
Owner:SHANDONG UNIV

Automatic stacking/reclaiming system for bulk cargo storage yard

The invention provides an automatic stacking/reclaiming system for a bulk cargo storage yard. The automatic stacking/reclaiming system comprises a stacker distributed in the storage yard and provided with a stacking cantilever, a reclaimer distributed in the storage yard and provided with a reclaiming cantilever, a first laser scanning device installed on the stacking cantilever and used for acquiring scanning data of the storage yard, a second laser scanning device installed on the reclaiming cantilever and used for acquiring the scanning data of the storage yard, a stacking positioning device and a reclaiming positioning device for acquiring GNSS positioning information, a stacker control device, a reclaimer control device, a remote stacking processing device and a remote reclaiming processing device. The stacker control device and the reclaimer control device acquire and output the GNSS positioning information, receive a stacking control signal and a reclaiming control signal, and control the stacker and the reclaimer to execute corresponding stacking/reclaiming actions according to the control signals. The remote stacking processing device and the remote reclaiming processing device receive a stacking instruction and a reclaiming instruction input by a peripheral user, acquire coordinate information of the corresponding storage yard according to the instructions, the scanning data and the GNSS positioning information, and generate stacking/reclaiming path information to serve as the stacking/reclaiming control signals to be output to the stacker control device and the reclaimer control device. The automatic stacking/reclaiming system is based on GNSS positioning, and is high in accuracy and low in cost, data can be shared, and automatic operation of the bulk cargo storage yard is achieved.
Owner:CCCC THIRD HARBOR CONSULTANTS

Process for manufacturing type alpha+beta titanium alloy rod bar for rotor impeller vane

The invention relates to an Alpha+Beta type titanium alloy steel bar fabrication technology used on a rotor vane, which comprises the following steps: (1) a cast ingot is heated, and the temperature is risen to 40 to 60 DEG C above a Beta transformation point after entering in a furnace, and the temperature is kept for 10 to 20 hours; (2) the cast ingot is processed through cogging and smithing, each pier drawing deformation amount is controlled between 30 percent to 40 percent; the smithing is performed in a two phase region after the pier drawing, and the total deformation amount is more than or equals to 90 percent; (3) the cast ingot is heated until the temperature reaches 20 to 40 DEG C above the transformation point after returning to the furnace, the temperature is preserved, and then the water quench is performed; (4) after the water quench, stocks are returned to the furnace and heated, and then are heat-preserved in the two phase region; the two phase region smithing is performed in a radial forging machine after the stocks reach a certain temperature, and the lengthening coefficient is controlled between 1.2 to 1.3; (5) after the radial smithing, the stocks is returned to the furnace and heat continuously and then is heat-preserved in the two phase region, then the stocks is rolled on a rolling mill, and the rolling temperature ranges from 910 to 940 DEG C. The Alpha+Beta type titanium alloy steel bar fabrication technology eliminates the figures on a macrostructure and the Beta spots on a microstructure of the heat strong two-phase titanium alloy caused by the hot work, and obtains a small-size two-phase titanium alloy steel bar with a fine and uniform equiaxed two-state structure.
Owner:BAOSHAN IRON & STEEL CO LTD
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