Ebola is one of the most destructive viruses and has caused thousands of deaths for lack of effective medications. Recently the world medical association has announced that their new medication could stop Ebola and cu...Ebola is one of the most destructive viruses and has caused thousands of deaths for lack of effective medications. Recently the world medical association has announced that their new medication could stop Ebola and cure patients whose disease is not advanced. We design an optimal strategy to eradicate Ebola with the new medication. In this paper, we mainly analyze the spread of the epidemic and the effect of new medication.We first introduce an improved SIR epidemic spread model to simulate the disease spread based on the characteristics of Ebola. We use several functions to evaluate an Ebola outbreak with respect to local conditions, natural population growth, isolation measures and incubation period. Differential equations have been obtained through the analysis of our SIR model and solutions have been graphed which match realistic facts well.Secondly, we evaluate the effectiveness of the medication. Since the drug is less effective for advanced patients, we should distinguish patients by their physical conditions. Based on statistics data, we discover that disease severity degree could be described by mortality, which highly relies on infected time. Our model also considers the viability loss of drugs and vaccines due to environmental factors.展开更多
Manganese dioxide(MnO_(2)),as a cathode material for multivalent ion(such as Mg^(2+)and Al^(3+))storage,is investigated due to its high initial capacity.However,during multivalent ion insertion/extraction,the crystal ...Manganese dioxide(MnO_(2)),as a cathode material for multivalent ion(such as Mg^(2+)and Al^(3+))storage,is investigated due to its high initial capacity.However,during multivalent ion insertion/extraction,the crystal structure of MnO_(2)partially collapses,leading to fast capacity decay in few charge/discharge cycles.Here,through pre-intercalating potassium-ion(K+)intoδ-MnO_(2),we synthesize a potassium ion pre-intercalated MnO_(2),K_(0.21)MnO_(2)·0.31H_(2)O(KMO),as a reliable cathode material for multivalent ion batteries.The as-prepared KMO exhibits a high reversible capacity of 185 mAh/g at 1 A/g,with considerable rate performance and improved cycling stability in 1 mol/L MgSO_(4)electrolyte.In addition,we observe that aluminum-ion(Al^(3+))can also insert into a KMO cathode.This work provides a valid method for modifcation of manganesebased oxides for aqueous multivalent ion batteries.展开更多
文摘Ebola is one of the most destructive viruses and has caused thousands of deaths for lack of effective medications. Recently the world medical association has announced that their new medication could stop Ebola and cure patients whose disease is not advanced. We design an optimal strategy to eradicate Ebola with the new medication. In this paper, we mainly analyze the spread of the epidemic and the effect of new medication.We first introduce an improved SIR epidemic spread model to simulate the disease spread based on the characteristics of Ebola. We use several functions to evaluate an Ebola outbreak with respect to local conditions, natural population growth, isolation measures and incubation period. Differential equations have been obtained through the analysis of our SIR model and solutions have been graphed which match realistic facts well.Secondly, we evaluate the effectiveness of the medication. Since the drug is less effective for advanced patients, we should distinguish patients by their physical conditions. Based on statistics data, we discover that disease severity degree could be described by mortality, which highly relies on infected time. Our model also considers the viability loss of drugs and vaccines due to environmental factors.
基金supported by the National Natural Science Foundation of China(Grant No.52102264)the Leading Edge Technology of Jiangsu Province(BK20220009)the Open Project Program of Wuhan National Laboratory for Optoelectronics(No.2020WNLOKF011).
文摘Manganese dioxide(MnO_(2)),as a cathode material for multivalent ion(such as Mg^(2+)and Al^(3+))storage,is investigated due to its high initial capacity.However,during multivalent ion insertion/extraction,the crystal structure of MnO_(2)partially collapses,leading to fast capacity decay in few charge/discharge cycles.Here,through pre-intercalating potassium-ion(K+)intoδ-MnO_(2),we synthesize a potassium ion pre-intercalated MnO_(2),K_(0.21)MnO_(2)·0.31H_(2)O(KMO),as a reliable cathode material for multivalent ion batteries.The as-prepared KMO exhibits a high reversible capacity of 185 mAh/g at 1 A/g,with considerable rate performance and improved cycling stability in 1 mol/L MgSO_(4)electrolyte.In addition,we observe that aluminum-ion(Al^(3+))can also insert into a KMO cathode.This work provides a valid method for modifcation of manganesebased oxides for aqueous multivalent ion batteries.
