Modelling the meteorological influence on the yellowing of spring wheat leaves

The yellowed-leaf rate is one of the important variables in simulation models for thegrowth of spring wheat. Based on the field experiments (1985-1988), the evolution of yellowed-leafrate of spring wheat is analyzed. The functional relationship between the yellowing process of greenleaves and the development stages of spring wheat is established. Based on modelling and correctingfor the yellowing proass of green leaves affected by temperature and moisture, the synthetic modelfor simulating the dynaniical evolution of yellowed-leaf rate is constructed. The numerical experi-inents show that the result of the modelling is satisfactory.

基于数据分析研究新疆地区新冠肺炎恢复期中医组方

目的 基于数据分析研究新疆地区新冠肺炎恢复期中医组方的用药规律。方法 整理分析病例中中药配方颗粒处方中的数据,通过Microsoft Excel软件对药物使用频次、分类、四气五味、性味归经等进行统计分析,IBM SPSS Modeler 18.0软件对药物进行关联规则和可视化网络图分析以全面展示药物之间的联系,IBM SPSS Statistics 25.0软件对药物进行聚类分析。结果 纳入本研究新冠肺炎恢复期中医组方方剂1 821首,新疆地区新冠肺炎恢复期高频药物以黄芪、石斛及金银花使用频次最高,以甘、辛类药物为主,从中药药性分析,以温性药物为主,其次是寒性药物,药物归经以归肺经为主,其次是归脾经。通过聚类分析、关联规则及可视化网络图分析,处方中的34味高频药物可分为3类。结论 本研究初步探索了中医药在恢复期运用的共性,通过辨证论治,遣方用药,得出核心药物为黄芪、石斛、金银花、陈皮等,核心治法为益气养阴、健脾益肺、化湿祛邪等,意在提高患者生活质量、促进脏腑功能恢复,以期在缓解临床症状的同时,提高患者免疫力,避免损伤脾胃之阳气。

Frequency correlation and group time delay of ambient noise and ship radiated-noise in the sea

The characteristics of frequency correlation and group time delay of ambient noise and ship radiated-noise in the sea are studied. The theoretical and experimental results show that the frequency correlation of ship radiated-noise is much greater than that of ambient noise,and the frequency correlation of ship radiated-noise at long distance has obvious group time delay