33results about How to "Small data requirements" patented technology

The invention provides a method for forecasting mid-long-term electricity consumption in combination with a population index. The method is characterized by comprising the steps of firstly, obtaining electricity consumption of each user and a resident population number in each of past k years in a to-be-forecast region; secondly, calculating a per-capita electricity consumption forecasting value by considering a per-capita electricity consumption increment coefficient; thirdly, calculating a resident population number forecasting value; fourthly, multiplying the per-capita electricity consumption forecasting value by the resident population number forecasting value to obtain a forecasting value of the sum of electricity consumption of residential users and commercial users; fifthly, calculating electricity consumption forecasting values of industrial users, electricity consumption forecasting values of non industrial users and electricity consumption forecasting values of other users; and finally, calculating a total electricity forecasting value. The forecasting method is simple in algorithm, can reduce data demand amount, is high in operability, effectively grasps key points of electricity consumption forecasting for different electricity users, is high in forecasting result precision, and can provide marketing decision support for power supply enterprises.

The invention relates to a geometric method for evaluating capacity recession of a lithium ion battery. The geometric method for evaluating capacity recession of the lithium ion battery comprises the steps that (1) geometrical characteristic values under different working conditions are extracted, wherein the number of the geometrical characteristic values is four, and the four geometrical characteristic values are the duration of continuous charging during constant-voltage charging, the maximum curvature radius of a current characteristic curve at the constant-voltage charging stage, the area under the condition of the constant-voltage charging current characteristic curve, and the maximum gradient of a discharge voltage characteristic curve at the early stage; (2) an intrinsic manifold based on the Laplace characteristic mapping method is established, namely the four geometrical characteristic values obtained in the first step are used as input of the Laplace characteristic mapping method to construct a low-dimensional manifold, namely the intrinsic manifold, embedded into a high-dimensional space; (3) a geodesic line on the manifold is used for geometric evaluation of the capacity of the battery. The geometric method for evaluating capacity recession of the lithium ion battery has the advantages that essential recession or the health state of the battery can be determined effectively, studying of a complicated electrochemistry mechanism is not needed, a complicated electrochemistry model does not need to be established, and the method can be realized easily.

The invention provides a method for rapidly analyzing ecological water need season difference. Aiming at the deficiency that different types of ecological water need computation methods can not rapidly analyze the ecological water need time difference under the condition of the lack of ecological and hydrological related information of an ecological system at present, an ecological target the ecological system of which changes following the time is divided into a critical period ecological target and a water need quantity and time change target. The requirement of the biological reproduction period with obvious contradiction of ecological need water and production need water on habitat environment factors is used as a critical period ecological target, and the critical period ecological water need quantity is determined; and an average natural runoff annual time change rate for years is used as a critical period ecological target, finally, the ecological water need season difference is determined, thereby meeting the requirement of rapidly analyzing the ecological water need season difference. The invention avoids complex computational effort and information quantity demand and effectively achieves the purpose of rapidly analyzing the ecological water need season difference.