This paper analyses the premise and essence of Karl Popper s falsificationist principle and examines the relationship between falsificationist method and underdetermination,thus expounding the idea that underdetermination doesn t negate falsificationist method altogether and reappraising the feasibility of falsificationist method and its historical status.

Principles and characteristics of falsification in science and technology;

Based on practice of technological edit,the concept of falsification in technological edit is raised by using Karl Popper s methodology of falsification.

The key and skills are statement abstraction by falsification, finding out the right starting point, and making adaptable use of various methods in science and technology editing.

A numerical wave model is developed to simulate freak wave generation,which is based on the modified four-order nonlinear Schrdinger equation governing the slow variation of complex envelope in deep water and a standard split-step,pseudo-spectral method.

Based on pseudo-spectral method,this article calculates focusing and active sonar of time reversal in shallow water environment and introduces evolution process of forward modeling sound field distribution and back analysis sound field distribution for noise source frequency of 100Hertz.

In this paper,the four-order nonlinear Schrodinger equations and the pseudo-spectral method are introduced to develop a 2-D numerical water flume based on the Benjamin-Feir instability of random wave trains,which is adopted to simulate the freak waves in deep water.