density ratio

density ratio

[′den·səd·ē ‚rā·shō]
(meteorology)
The ratio of the density of the air at a given altitude to the air density at the same altitude in a standard atmosphere.

density ratio

The ratio of the density of air at a given altitude to the density of the air at sea level under standard conditions.
References in periodicals archive ?
Another widely used mechanical plastic, High Density Polyethylene (HDPE ), is a thermoplastic known for a high strength to density ratio.
The meeting also discussed the existing sharing formula of Divisible pool to provinces, status of straight transfer, present population, its density ratio, urban influx and proposed reforms in collection of GST on goods.
ABB's RPM AC permanent magnet motor has a high power and torque density ratio which is needed to achieve the sustained low speed required for cooling tower operation.
Using the Health Workers Reach Index, which measures health worker density ratio, skilled birth attendance and child DPT3 immunisation rate, this study of contraceptive provision compared Demographic & Health Survey and health workforce data from five eastern African and five western African countries.
The health worker density ratio (HWDR), which measures the number of doctors, nurses, and midwives per 1000 population (World Health Organization, 2006) and the health worker reach index, which incorporates the HWDR and measures of access to and actual use of services provided by health workers (Save the Children, 2011) are two indicators that have increasingly been used to measure health workforce variables.
Aerosol mechanism is characterized by the formation of dispersion products with high density and active reactivity, indicating that the quantity and size of polymeric particles depend on the relative density ratio of active particles to inactive particles in the gas phase.
He noted that the company's defect density ratio is below 0.
Al Wa'ab City will provide housing for more than 8,000 people, yet offer the lowest density ratio in any new major development in the country.
In contrast, HEV infection was diagnosed by detection of anti-HEV immunoglobulin (Ig) M (cutoff optical density ratio >10; threshold value 1 [Adam's, Rome, Italy]) and by detection of HEV RNA in serum (5).
Using these curve fits it was estimated that the liquid viscosity increased by 290%, the liquid density decreased by 7%, and the liquid/vapor density ratio decreased by 140% due to both the reduction in saturation temperature from 25[degrees]C to 0[degrees]C, and the addition of ND-8 at 1.
Table 1: Analogous quantities of classical hydraulic analogy 2D gas flow Free Surface incompressible water flow Temperature ratio T/T0 Hydraulic depth ratio h/h0 Density ratio Hydraulic depth ratio h/h0 Pressure ratio P/P0 Sq of hydraulic depths ratio (h/h0)2 Sound Velocity a0 Wave Velocity _(gh) Mach number V/ a0 Froude number V/_(gh) Velocity ratio V/Vmax Velocity ratio V/ Vmax Subsonic flow M<1 Streaming Water flow Fr<1 Supersonic flow M>1 Shooting Water Flow Fr>1 Compressible shock Hydraulic jump
Figure 2 shows the axial forces acting on the orbiting scroll compressor and the expander operating at a designed volumetric ratio and at a lower density ratio.