For practical computations,the specific Monte-Carlo code introduced here uses implicit capture、 weight and energy cut off、geometric splitting and Russian roulette and directional biasing techniques as primary variance re- duction methods.

The sampling method by coupling criticality source direction biasing and the exponential transform is established for duct shielding calculation.

Comparative Analysis and Bias Evaluation on Results of AFP and CEA between Different Chemiluminescence Analysis Systems;

Estimation of bias on result of self-developed biochemical test system;

Bias analysis on the results of bilirubin among different analysis systems;