网格化局部自适应DBSCAN聚类算法

经典DBSCAN(density based spatial clustering of applications with noise)算法需要人工指定邻域半径(Eps)和点数阈值(Minpts),且均为全局参数,导致聚类准确率低.针对此问题,为了提高经典DBSCAN聚类算法的聚类准确率,基于网格划分思想,提出了一种...

Adaptive OFDM modulation structure optimization design

Using the new classical economic theory, this paper analyzes the different capacity organization modes in the instant distribution market and summarizes the conditions for the existence of the four production structures (platform self-employment, platform crowdsoring, joining and joining crowdsorting) of the instant distribution market. Based on the learning cost of production and the transaction efficiency factors of the objective environment of the market, the inframarginal analyses model of the instant distribution market is constructed. Through the analysis of the model, the micro-mechanism and formation mechanism of the instant distribution enterprise adopting different capacity organization modes are obtained: learning cost and market transaction efficiency determine the production decision-making of the producers of the final instant distribution service and intermediate products, thus producing different modes of capacity organization, and the decision-making of these producers interacts with each other to form different production structures of the instant distribution market.