This study investigated the mechanism, prevention measures, and control methods for earthquake disasters typically occurring in mines with thick hard rock strata. A mine stope large faults strata Hebei Province was taken as background object. Then, theoretical analysis numerical simulation were adopted conjunction field monitoring to explore how horizontal stress evolves hanging roofs of such m...

The instrumental variables framework is commonly used for the estimation of causal effects from cohort samples. However, the combination of instrumental variables with more efficient designs such as case-control sampling requires new methodological consideration. For example, as the use of Mendelian randomization studies is increasing and the cost of genotyping and gene expression data can be h...

Taking Ping Dingshan Coal Mine Group 12 as an example, this paper explains the system layout, key equipment and backfilling technology in detail. It probes into the characteristic of rock strata movement behavior and surface deformation above the gob area through in-site measurement method. The results show that as the overburden strata are effectively supported by the backfill body in mined ou...

The Cappell-Shaneson decomposition theorem for self-dual sheaves asserts that on a space with only even-codimensional strata any selfdual sheaf is cobordant to an orthogonal sum of twisted intersection chain sheaves associated to the various strata. In sharp contrast to this result, we prove that on a space with only odd-codimensional strata (not necessarily Witt), any self-dual sheaf is cobord...

Symbolic Data Analysis allow for the extension of Data Analysis to symbolic data, that is, more complex data structures than classical or monovalued data. Symbolic data are the symbolic descriptions given to individuals ω ∈ Ω associated to symbolic variables. For example, symbolic descriptions may be given by probability distributions, sets of categories or intervals. Strata Decision Tree is a ...

Balanced sampling is a very efficient sampling design when the variable of interest is correlated to the auxiliary variables on which the sample is balanced. A procedure to select balanced samples in a stratified population has previously been proposed. Unfortunately, this procedure becomes very slow as the number of strata increases and it even fails to select samples for some large numbers of...

BACKGROUND India has the greatest burden of diarrhea in children under 5 years globally. The Diarrhea Alleviation through zinc and oral rehydration salts (ORS) Therapy program (2010-2014) sought to improve access to and utilization of zinc and ORS among children 2-59 months in Gujarat and Uttar Pradesh (UP), India, through public and private sector delivery channels. In this analysis, we presen...