Spinel-type CuYyFe2−yO4–CuCo2O4 nanocomposites have been successfully synthesized via a facile citric acid (CA)-assisted sol–gel method. And the as-synthesized nanocomposites have been characterized by techniques of X-ray diffraction (XRD), nitrogen adsorption BET method, and transmission...

Assessing the water resource carrying capacity is beneficial for measuring the scale of industry and population agglomeration, and also avoiding the contradiction between increasing people and decreasing available water resource, due to the expansion of industry and city size. Based on the...

Global warming has drawn great attention in recent years, and the resultant extreme drought events have seriously influenced food security. Drought hazard has become a major stress factor for food production in China. The present study aimed to assess the drought hazard risk of maize in middle...

Land structure change not only relates to the coordinated development of regional social economic, but also determines the ecological environment security in certain region. Ili river valley was chose as the study area. The scientific and quantitative assessment of land use structure and spatial...

Food security has drawn great attention from both researchers and practitioners in recent years. Global warming and its resultant extreme drought events have become a great challenge to crop production and food price stability. This study aimed to establish a preliminary theoretical methodology...

Controversy exists regarding proper methods for the selection of variables in confounder control in epidemiological studies. Various approaches have been proposed for selecting a subset of confounders among many possible subsets. This paper describes the use of two practical tools, Stata...

Confounding is a major issue in observational epidemiological studies. This paper describes two postestimation commands for assessing confounding effects. One command (confall) displays and plots all possible effect estimates against one of p-value, Akaike information criterion, or Bayesian...