differential connection
1.For the differential testing, it is very important in the mixed-signal test. There is a method for testing differential connection circuit and the application of ABM (analog boundary module), which conform this standard completely. It realizes the boundary scan differential testing for the mixed-signal circuits, so as to enhance the test capability for the differential circuit.
2.Through the application of three-dimensional gap element for simulating the interface property between filling and reinforcing material, differential connection pattern between abutment and reinforcing means and foundation condition, the author researches the active property of reinforcing treatment technique of geogrid and geocell, discusses the adaptability.
3.A common mistake and its harm in CT secondary connection of transformer differential protection were analyzed, the correct connection mode was explaned, and how to use the hexagon vector diagram of checking was introduced.
4.Slowly loosen hose connection at TC#3 until differential gauge rises to about 2 PSI, then tighten.
5.Connection method includes single star and double star, relaying protection method includes open delta voltage protection, differential current protection, differential protection, neutral unbalance current protection etc.
6.Close shutoff No. 1. Slowly loosen hose connection at TC# 2 until differential gauge rises to about 2 PSI then tighten. If the differential reading does not decrease record check valve as tight.
7.Using Chern metric and connection, we obtain an integral representation of (p, q) differential forms on D, which is a generali-zation of the Koppelman-Leray-Norgeut formula for (0,q)-forms on Stein mani-folds.
8.Along with the progress of drilling technology,many new types of BHA such as steering motor assembly,dropping assembly with eccentric bend sub,dropping assembly with flexible connection are developed based on common building,dropping and holding assemblies.For using these BHA ,a new mathematical model is put forward for 3D static analysis of these types of BHA under small deflection.And its weighted residual solution is given.The mathematical model includes(1)differential equations;(2)boundary conditions at drill bit,stabilizer,bend angle,diameter change,tangential point and borehole wall;(3)lateral forces and deflection angles of bit.The software based upon this method runs well.
9.Abstract: Along with the progress of drilling technology,many new types of BHA such as steering motor assembly,dropping assembly with eccentric bend sub,dropping assembly with flexible connection are developed based on common building,dropping and holding assemblies.For using these BHA ,a new mathematical model is put forward for 3D static analysis of these types of BHA under small deflection.And its weighted residual solution is given.The mathematical model includes(1)differential equations;(2)boundary conditions at drill bit,stabilizer,bend angle,diameter change,tangential point and borehole wall;(3)lateral forces and deflection angles of bit.The software based upon this method runs well.
