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99 results about "Time trends" patented technology

Time-trend designs are a form of longitudinal ecological study, and can provide a dynamic view of a population’s health status. Data are collected from a population over time to look for trends and changes.

Electric power system vulnerability assessment method

InactiveCN104156769ACatastrophe preventionFully determinedData processing applicationsAc network circuit arrangementsStructural vulnerabilityEngineering
The invention discloses an electric power system vulnerability assessment method, and relates to the field of a power network safety analysis technology. The electric power system frangibility assessment method comprises the following steps: (1), establishing a complex network structure of an electric power system; (2), establishing a structure vulnerability factor indicator through electrical betweenness in the complex networks structure; (3), obtaining network real-time trend data through a static energy function method; (4), calculating a state vulnerability factor, and calculating to obtain an integrated vulnerability assessment indicator through combination with a structural vulnerability factor in step (2); and (5), outputting a vulnerable area of the electric power system. According to the invention, since the electric power system vulnerability assessment method analyzes vulnerable links which may exist in the electric power system from a global perspective, the vulnerable area in the operation of the electric power system can be comprehensively, accurately and effectively determined, the defects of a conventional single one-sided electric power system vulnerability assessment method and the like can be made up for, emphases are provided for prevention and control of safe operation of the electric power system, and collapse of the electric power system, caused by disturbance or accidents, is effectively prevented.
Owner:ELECTRIC POWER SCHEDULING CONTROL CENT OF GUIZHOU POWER GRID CO LTD +1

Intelligent cargo delivering and collecting device of unmanned aerial vehicle and implementation method

The invention provides an intelligent cargo delivering and collecting device of an unmanned aerial vehicle and an implementation method, which sufficiently utilize the modern network and the artificial intelligence technology. The intelligent cargo delivering and collecting device comprises a delivering aerial vehicle, a dropping cargo delivering and collecting intelligent device assembly and an intelligent cargo delivering and collecting implementation method; the delivering aerial vehicle is suspended in the mid air to intelligently carry out cargo packet delivering or collecting operation and repeated landing and taking-off working manners of the unmanned aerial vehicle are changed; the device is more convenient, more efficient and safer and realizes intelligent direct delivery; the investment of manpower and material resources of secondary handover, transportation and home delivery of cargo packets can also be greatly and effectively reduced, so that the cost is saved and resources are saved. Especially, aiming at current situations of social development and modern living manners, the delivering aerial vehicle is suspended in the air and the cargo packets can be rapidly and directly transferred and can be easily, conveniently, directly and intelligently collected and delivered; the intelligent cargo delivering and collecting device can give better services to old people, dwelling people and people working and living in high-rise buildings, and can also be adaptive to outdoor consumption requirements of people at anytime and anywhere and meet the fashion psychology of pursuing high-tech content and following time trend of young people.
Owner:广东星云湾新能源汽车销售股份有限公司

Multi-ship encounter collision prevention method for bacterial foraging optimization

InactiveCN104809529AImprove convergence speedThe process of avoiding collisions with multiple ships is smoothForecastingBiological modelsGrey correlation analysisBacteria foraging algorithm
The invention belongs to the technical field of planning of automatic collision prevention paths of ships, and mainly relates to a multi-ship encounter collision prevention method for bacterial foraging optimization. The multi-ship encounter collision prevention method comprises the following steps: establishing a required simulation interface of a ship simulation test, and determining parameters of a ship and each target chip in multi-ship encounter collision prevention; judging an encounter situation and analyzing collision risks; establishing a target function (an optimization algorithm target function) of the multi-ship encounter collision prevention method; determining a key ship which needs to prevent collision and risk based on a grey correlation analysis method: determining an ideal effect sequence: calling an improved bacterial foraging algorithm to optimize the multi-ship encounter collision prevention paths; completing the encounter collision prevention sailing, re-sailing and restoring original courses. According to the multi-ship encounter collision prevention method, the quality of the bacteria is integrally analyzed based on a mean value and variance of the bacteria, and a last-time trended target function value is combined for judging bacteria for copy operation, so that the convergence rate and the searching precision of the algorithm are improved, and the efficiency of generating a multi-ship encounter collision prevention strategy is improved.
Owner:HARBIN ENG UNIV

Case-based reasoning method capable of supporting time sequence matching

The invention relates to a case-based reasoning method capable of supporting time sequence matching. The method includes the following steps of: case base construction; case retrieval: with the state information of a current target event adopted as input, case retrieval is carried out based on the case base, so that the comprehensive distance from the current target event to cases in the case base can be obtained; case reuse: if the comprehensive distance from the current target event to a certain case in the case base is smaller than a set threshold value, the current target event is successfully matched with the case, and the case result of the case is outputted so as to be used for a target event; case correction: when the case is wrong, the successfully-matched case result is corrected according to the feedback information of the target event, and the corrected case result is submitted to the case base, and case-based reasoning is terminated. According to the case-based reasoning method capable of supporting time sequence matching of the invention, a time sequence matching mechanism is introduced into case feature item matching, so that case-based reasoning has a time trend analysis ability, and can be better applied to the engineering field emphasizing time trend analysis.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI

Telephone traffic abnormity detection method and device

ActiveCN107566665AOvercome the defects in setting alarms by directly collecting historical traffic volumeImprove accuracySpecial service for subscribersSupervisory/monitoring/testing arrangementsAnomaly detectionTime trends
The invention provides a telephone traffic abnormity detection method and device. The method includes the following steps: a historical trend threshold regular calculation step: cleaning historical telephone traffic data and regularly calculating a historical trend threshold on the basis of the cleaned historical telephone traffic data; a historical threshold detection step; a real-time trend detection step: calculating a real-time trend threshold on the basis of telephone traffic data ahead of a current detection point within a first period of time, and detecting whether the current telephonetraffic quantity exceeds the real-time trend threshold; a historical trend detection step: detecting whether the current telephone traffic quantity exceeds the historical trend threshold; and a warning sending step: if the current telephone traffic quantity exceeds a historical threshold, the real-time trend threshold and the historical trend threshold, sending out warning information. On the basis of detection of the historical threshold, real-time trend detection and historical trend detection are added, thereby overcoming the disadvantage of warning setting through direct collection of historical telephone traffic quantity and improving the accuracy of telephone traffic abnormality detection.
Owner:携程旅游信息技术(上海)有限公司

Online calibration-based express way traffic flow data filling method and system

The present invention discloses an online calibration-based express way traffic flow data filling method and system. The method comprises a data acquisition step of grouping and numbering the detectors, and establishing a traffic flow database according to the traffic flow data acquired by the detectors; a real-time diagnosis step of diagnosing the traffic flow data acquired by the detectors real-timely, and diagnosing whether the data is lost or wrong; a model establishment step of establishing a multivariate linear model according to the time trend and the spatial relationship of the lane data of the groups of detectors; an online calibration step of establishing a parameter autoregression prediction model, and predicting the model parameters at the current moment based on the model parameters obtained according to the earlier stage data in the traffic flow database; a data filling step of filling the traffic flow data according to the multivariate linear model and the model parameters at the current moment. The online calibration-based express way traffic flow data filling method and the online calibration-based express way traffic flow data filling system of the present invention have the advantages of being simple to calculate, being small in storage space and accurate in prediction result, etc., and effectively make up the insufficiency of a static model method at the aspect of data filling.
Owner:SHANDONG UNIV

Method for arbitraging by using inherent price discrepancy of relevant finical products

InactiveCN101986342AThe real-time arbitrage process is clear and effectiveUniversalFinanceTime trendsMachine learning
The invention relates to technical field of financial product investment arbitrage technology and provides a method for arbitraging by using inherent price discrepancy of relevant finical products. The method comprises the following steps of: processing historical data of the relevant financial products; converting the absolute prices of various financial products with high relevance into comparable regular prices, so that two relevant financial products are comparable; and based on the comparability of the relevant financial products, identifying the price discrepancies and performing arbitrage. The method in the invention solves the problem that the price measures of futures and spot goods are inconsistent in the deadline arbitrage and can gather all priced-related financial products or investment portfolio into one group for arbitrage, so that the investment opportunity and the investment range of arbitrage investors are widened greatly and the arbitrage process becomes more accurate. Moreover, the method also can provide a time-trend chart, a price-discrepancy chart, a unique arbitrage Kreinik chart and the like corresponding to the arbitrage, so that the real-time arbitrage processes of the investors are more clear and effective.
Owner:武汉元宝创意科技有限公司

Temperature/ economic growth factor considered monthly total electricity consumption predication method

The invention discloses a temperature/ economic growth factor considered monthly total electricity consumption predication method. The method comprises the steps of creating a linear regression technique for the monthly total electricity consumption, the current average temperature and the economic growth index; predicating monthly total electricity consumption, including historic total electricity consumption of the same month as the predicated month and monthly average temperature data; expressing the economic growth factor through the time trend term; building a time trend term included predication model; acquiring the historic above-scale industrial added value growth rate data of the same month as the predicated month and obtaining the economic growth index; building an economic growth index included predication model; calculating the total electricity consumption of the predicated month by two equation methods of the predicated models. The method has the advantages that the temperature/ economic growth factor considered monthly total electricity consumption predication models are utilized to obtain the predicated monthly total electricity consumption, which is beneficial for power planning and the preparation of production schedule and monthly production planning of a power grid.
Owner:STATE GRID CORP OF CHINA +2
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