X gas field is located in the central inversion structural belt of Xihu Sag, East China Sea Basin.The main target layer H4 is in shallow water delta sedimentary environment.The dominant frequency of seismic data of the gas field is low (25 Hz), while the buried depth of H4 layer is large (3 300-3 400 m).The reservoir has low porosity and low permea
Simple approximations for the ruin probability in the risk model with stochastic premiums and a constant dividend strategy
We deal with a generalization of the Cutting Board Sets risk model with stochastic premiums where dividends are paid according to a constant dividend strategy and consider heuristic approximations for the ruin probability.To be more precise, we construct five- and three-moment analogues to the De Vylder approximation.To this end, we obtain an expli
Decompression Retinopathy after ExPRESS Shunt Implantation for Steroid-Induced Ocular Hypertension: A Case Report
Purpose.To present a unique case of decompression retinopathy after the Cutting Board Sets implantation of ExPRESS drainage device.Method.A 25-year-old female patient underwent implantation of ExPRESS drainage device in the left eye for the management of steroid-induced ocular hypertension.Results.On the postoperative day one, best-corrected visual