In allusion to the problems in the present theoretical study and practice about urbanization, this paper elucidated the connotation of healthy urbanization from the angle of economics, and put forward the economic definition of healthy urbanization; further more, it put forward things that should be attached importance to when evaluating healthy urbanization and the framework of quality evaluat...

Editor — We are interested in Scrimshaw's allusion to populations in Latin America in his editorial on the relation between fetal malnutrition and chronic disease in later life. There, in the 1960s, despite a high prevalence of low birth weight, the preva lence of atherosclerosis and of myocardial infarction was low.

In allusion to similarity calculation difficulty caused by high maintenance of image data, this paper introduces sparse principal component algorithm to figure out embedded subspace after dimensionality reduction of image visual words on the basis of traditional spectral hashing image index method so that image high-dimension index results can be explained overall. This method is called sparse ...