The changes of free surface shape of TiAl-based melt during induction melting with cold crucible;

Numerical research on pressure distribution of inside wall of a cave-in cavity with free surface under the uniform fluid condition;

Numerical study of the three-dimensional free surface in cylindrical tank;

The definitions and representations of the vector, free vector and cartesian vector, and the relation betwee the vector and its components are discussed.

Aiming at EHV/UHV transmission lines with shunt compensators, on the basis of detecting the resonant component at the terminals of the phase that is switched off a criterion to determine the fault nature of adaptive single-phase reclosing is proposed.

When a single-phase fault occurs on shunt reactor compensated EHV transmission lines,the elements,which compose the recovery voltage of the opened phase after the breaker tripping,include one more resonant component under transient faults than under permanent faults,so the fault nature can be distinguished by making an integral of the recovery voltage during a fundamental frequency cycle.

Of course, judges can not exercise discretion arbitrarily.

However,because principle is necessary connection with discretion,reasoning by principle will be very arbitrary;especially when principles contradict with rules.

The connection between rules and principles is that of rigid regulations and discretions.