The paper introduced the theory and application of DAC chip DAC7625 and the V/I chip XTR110.An analog output interface circuit which used DAC7625 and XTR110 is designed.
①Visual Analogue Scale(VAS): It was lower in the observational group than the control group (0.78±0.76,1.53±1.51), and there was significant difference (P < 0.05).
The controller is composed of several circuits including MCU system,keyboard and display system, digital quantity input, analog quantity (A/D conversion) input, control output and series communication interface.
Using PIC18F258 as a processor of base-station, automatic identification of analog quantity and switching value can be realized and sensor's signals can be acquired in a high precision with the maximal error of 0.02%, thus not only guaranteeing real-time property but also remarkably improving the system flexibility and function extensibility.
It is adopt inertial method to strain wave to input to analog quantity, raise the precision that A/D changes, have improve systematic anti-interference ability, and made better control result in practical application.
The rotational speed PID of the electrical machinery was controlled by control order of PID offered with S7-200, combined import / export the modules to realize the control of analog quantity.
Further, an analog of the Kempf-Ness criterion is obtained and homogeneous spaces of compact Lie groups which admit only polynomially convex equivariant embeddings are characterized.
It was then observed independentely by Lusztig and Ginzburg-Vasserot (see [L1], [GV]) that this construction admits an affine analogue in terms of periodic flags of lattices.
The graded $\mathbb{F}_p$-algebra A(V) turns out to be normal and Cohen--Macaulay, there is an analogue of Steenrod powers and also a "Karagueuzian and Symonds-type" finiteness theorem for its invariant theory, etc.
The evoked horizontal eye movements were observed and measured by means of a closed circuit television system adapted to provide an analog signal proportional to the eye movement.