The importance of energy-differential cross sections highlighted in a benchmark for positronium formation in the Galaxy

Abstract

Synopsis We detail a benchmark model aimed at improving the implementation of Monte Carlo codes for simulations of positrons propagating through interstellar media. The benchmark highlights the key features of cross sections sets which lead to major differences in astronomical observables. One of these is the energy-differentiation of the ionisation cross section. This leads us to call for improved cross section sets for all constituents of interstellar media.

Power Consumption Forecast of Three Major Industries in China Based on Fractional Grey Model

“…As the foundation and guarantee of social development, energy has very important economic and social value [1]. With the rapid economic and social development, the energy problem has become increasingly prominent, and the energy consumption and its future development trends have attracted extensive attention from scholars at home and abroad.…”

“…Su Zhenyu established a multiple linear regression equation to forecast the electricity demand in Suzhou [12]. Li Wencong used the optimized GM (1,1) model to explore and analyze the electricity consumption of the whole society in Hubei Province [13]. Chen Tingting analyzed the terminal energy consumption in Shaanxi Province by improving the variable weight combination forecasting model and provided suggestions for the development of the electricity market in Shaanxi Province [14].…”