A new concept of critical twist is proposed: the tensile component force at the.

The critical twist factors of two sorts of soybean protein yarn made from different manufacture means are tested and analyzed,the corresponding regression equation,regression curve and the maximum of regression curve are concluded.

To investigate the relationship between strength and the critical twist factor of rotor-spun yarn,yarns made of cotton,polyester and newdal were tensile-tested,then the curve of twist factor coefficient and strength,regression equation and critical twist factor of yarns.

Three-dimensional distance matrix and prediction of the critical temperatures of alkanes;

In the leading basic research of molecular thermodynamics new theory 8: semi-metal structural model of organic molecules and theoretical equation of the critical temperature;

Prediction of the critical temperatures of alkenes from the information of mloecular structure;

Prediction of critical length of reinforcement for reinforced sand retaining wall by neural network;

On critical length of flexural slumping rock layer in layered rocky slope and its influencing factors;

A critical length concept is introduced to describe the heat transfer performance of thin film flows with high Reynolds number in this investigation.

The predicted pressure drop per unit length was compared with the experiments as a result that a critical velocity at which the wall slip begins was obtained and that the relationship .

The dynamic stress, strain and displacement of the windshield are obtained, and the critical velocity when the windshield failure is also gotten on the FE analysis.

In radial ultrasonic grinding, the contacting state is discontinuous and the critical velocity accords with the existing vibration cutting theory.