The pressure-piezoresistance fit of the gauge can be mritten asP(GPa) =- 0. 14 + 90. 63( R/R0 ) + 10. 81(R/R0 )2 - 7. 64(R/R0 )3here, R0 is the initial resistance of the gauges, ΔR the resistance increment under shock loading.
From the experiments with Helium, the sensitivity of gauge DL-2 was found to be of 4.2±0.2 Torr~(-1) in the range from 10~(-3) to 10~(-6) Torr, while the sensitivity of a BA gauge to be of 3.3±0.3 Torr~(-1) in the range from 10~(-5) to 10~(-6) Torr.
With the fast gauge at nil magnetic field,the measuring region is from 6.4×10~-6Pa to 0.15Pa,and the rate of ion current to electron current increases linearly with the pressure from 1×10~-5Pa to 0.15Pa.
Dynamic flow conductance is used to calibrate vacuum systems to offer a metrological standard for vacuum, which is available to the calibraction of HV and UHV gauge. Its vacuum calibration range is from 10~(-1) to 5×10~(-7) Pa, with an uncertainty of the standard for combined calibration up to 0.69%～1.4%.
The method we use is a combination of the smoothing effect of the operator ?t + ?x(2j+1) and a gauge transformation performed on a linear system, which allows us to consider initial data with arbitrary size.
We prove the uniqueness of weak solutions of the time-dependent 3-D Ginzburg-Landau model for superconductivity with (Ψ0, A0) ∈ L2(Ω) initial data under the hypothesis that (Ψ, A) ∈ C([0, T]; L3(Ω)) using the Lorentz gauge.
A lightweight automotive prototype using alternative materials and gauge thickness is studied by a numerical method.
Error measurement and assemble error correction of a 3D-step-gauge
A new artifact called 3D-step-gauge consisting of a pyramid array and a compound, is proposed to calculate geometrical errors for machine tools.