(2) If the direct parameter signal cannot be obtained, or the semantic measurement and transmission signal lag behind, the indirect parameter with unit function relationship with the direct parameter can be selected as the controlled variable;
(3) As a controlled discoloration, it must be measurable and have sufficient measurement sensitivity; Optional direct parameters are
(4) When selecting the controlled variables, the process rationality and the present situation of existing instrument products must be considered;
(5) The controlled variables should be independently controllable.
In the production process, there are many factors that affect the normal operation, but not all of them need automatic control. The correct selection of control variables is of decisive significance for stabilizing the production process, improving labor productivity and improving production conditions. The selection principle of control variables is: univariate principle. As long as one quantity is changed and other quantities are controlled, the external environment remains unchanged.
What is finance?
Finance refers to economic activities such as currency issuance, commodity circulation and recovery, loan issuance and recovery, deposit and acquisition of savings, and discount transactions. After re-optimizing the original resources, finance completed the circulation of equivalent circuit commodities with use value and income. Finance is a personal behavior that people decide to cross the optimal allocation of resources in an uncertain natural environment. This article mainly talks about what is the knowledge about financial risks, and the content is for reference only.