According to the instances of bridge design,this paper analyses the two formulas in common use in calculation of general erosion of riverbed of bridge,gives the scope of application and defects of the formulas,and proposes a suggestion on appliance of the formula in calculation of general erosion of riverbed of bridge.

According to the calculation results of general erosion of riverbed of bridge,this paper analyzes the impact of the main parameters in the formula to general erosion,gives the scope of application and defects of that formula,and proposes a suggestion on determination of general erosion depth.

This paper applies the BP method of the artificial neuron network methods successfully in simulating the testing data of the general scouring depth of the boulder riverbed along the Chengdu-Kunming Railway.

This paper studied the hydraulic factors of bridge site through the basic hydraulic principles, received bridge site s minimum shrunk rate of flowing section,maximum jammed water depth,and ordinary maximum scouring depth.

The paper has applied Wspro software and the formulas 64-1 and 64-2 of general scour in china to calculate the general scour of contracted channel.

According to a general multipath propagation model of radio communication,this paper presents a stochastic spatio-temporal propagation general model with MS based on the geometrically layered model and the Markov model.

The general and specific relationship is an important issue in the history of philosophy.

Modern aesthetics has shifted from the hermeneutic frame of knowledge theory to that of existential theory, making it impossible to re-take the traditional road of going "from the particular to the general".