According to the key strata discrimination theory of controlling the overlying strata, the calculation method establishes that the step-type expansion of the mining gas channel corresponds to the advancing distance of working face, and this research also confirms the expanding rule that the mining gas channel in overlying strata follows the advancing distance of mining working face.
Reef habitat features and no-take marine reserves (NTMRs) were used to partition the 885 km2 sampling domain into sub-areas (or strata) to control the variation of fish density.
To test the adequacy of the 5 year strata to control for secular changes in survival, we computed the annual death rate by year in the cohort (Table 2).
We included an age adjustment (indicator variables for 2-month age strata from 0 to 11 months and 6-month strata from 12 to 59 months) to control for the changing age distribution of the population over time and a calendar time adjustment (six-month time strata) to control for temporal trends.
Patient characteristics varied across strata of glycemic control and whether or not they had an HbA1c measurement (Table 2).
Birth weight strata of hospital controls suggested a dose response effect for IL, and also for ALL and AML subtypes after adjusting for certain confounders.
Several of the scholars, he wrote for the website of Caixin, a Chinese portal, described China as being "unstable at the grass roots, dejected among the middle strata and out of control at the top".
Scholars at a recent government conference summed it up well: China is "unstable at the grass roots, dejected at the middle strata and out of control at the top .Once, the party could bottle up dissent.
But that is what a new leadership must do, if it is to transform a society "unstable at the grass roots, dejected in the middle strata, and out of control at the top", which is how some Chinese scholars apparently described their country at a recent conference near Shanghai.
The fundamental reason why hydrocarbon in deep tight strata of hydrocarbon basins is not controlled by buoyancy is that the sum of rock capillary force and overlying static water pressure is greater than the pressure in the hydrocarbon reservoir.
