unmeasurable

adj.

无法计量的，不可测的，无限的；

Observing the states of systems with unmeasurable disturbances
Measuring the unmeasurable: a country's non-R&D expenditure on product and service innovation
No Longer Unmeasurable? A Multidimensional Integrated Model of Nonprofit Organizational Effectiveness
On the generalization of observers to systems with unmeasurable, unknown inputs
Observing the states of systems with unmeasurable disturbances. IEEE Trans. Autom. Control 20(5), 716-717
On the generalization of observers to systems with unmeasurable, unknown inputs ☆ ☆☆
The Contribution of Unmeasurable Inputs to Fisheries Production: An Analysis of Technical Efficiency of Fishing Vessels in the Engli...
The output control of linear time-invariant multivariable systems with unmeasurable arbitrary disturbances
A generalization of the output control of linear multivariable systems with unmeasurable arbitrary disturbances
Output-feedback control of a class of stochastic nonlinear systems with linearly bounded unmeasurable states