アーリーオンライン (ボリューム - 4 | 問題 - 1) at IgMin Research

Since 1950, long-term and large-scale vegetation afforestation has been carried out on the Loess Plateau, China. As plants grow, the plant resources relationship changes, which leads to soil and vegetation degradation, and crops fail because of vegetation overload or waste of natural resources due to low vegetation load, which is not good for the sustainable utilization of soil water resources and agricultural high-quality in water scarcity areas. To solve these problems, the concept of soil water vegetation carrying capacity occurred. After a ...couple of years of research, the result showed that it is the ability of soil water resources to support vegetation, changing with vegetation type, time, and locations, expressed by the number of plant population or plant density of the indicator plant in a plant population or community. The indicator plant is a constructive species for natural vegetation and a goal or cultivated species for artificial vegetation. The soil water vegetation carrying capacity is the most important theory for sustainable utilization of soil water resources and high-quality development in water scarcity areas. Now, the research on soil water vegetation carrying capacity should be strengthened to estimate soil water vegetation carrying capacity in different vegetation types and location and regulate the plant water resources in the critical periods of plant water relationship regulation to achieve sustainable utilization of soil water resources and agriculture high-quality development and meet the people's yearning for a better life and the needs of agricultural high-quality production and increase new quality productivity. Keywords: Water scarcity areas; Soil Water resources; Soil water vegetation carrying capacity; sustainable utilization of soil water resources; agricultural high-quality development.Read more

Tramadol initially use as an analgesic which lead to addiction and overdose worldwide due to prolong consumption, particularly in low and middle income countries. This paper deals with a mathematical approach of Multiple Relapse Tramadol Abuse Model (MRTAM) to analyze affected population with time domain. This model is a non-linear compartmental framework, which simulates the abuse progression. Parameters such as prevention rate (σ), relapse rate (ξ2), treatment rate (ξ1), and law enforcement (η) influence the abuse population a...nd the reproduction number (R0). Eigenvalues of the dynamics are derived to analyze the stability and behavior of the system. Results show that the system is highly sensitive to prescription inflow, progression and prevention parameters. Endemic equilibrium is obtained and also presented the analysis of bifurcation and partial rank correlation coefficient (PRCC) to quantify and assess the influence of various parameters on the abuse population. MSC Classification: 92C60; 92D25Read more