This thesis is targeted to the waveform selection and fusion, background normalization and the separation between reverberation and the target echo, by which the detection performance of the active sonar will be apparently increased.

Based on the radiation resolution and imagery intensity contrast, the target detection probability and its dependence on the radar looks and intensity contrast of the target to uniform background are studied.

We then construct a formal context called an agreement context designed to show that which is in common between the situations.

The Inculcating of Cultural Background in the Teaching of Reading Oomprehension;

A cultural background perspective of the Chinese loan words in the early Uigur;

Different Cultural Backgrounds and Different Thought Approaches—Comparison between the Yinming and the Nominalistic Doctrine;

Then points out;Since there exits different culture background between the two countries,it is inevitable that obstacle will occur in the course of comparative study of bioethics between China and USA.

According to the practice of teaching of listening English,analyzed the main points: The students lack the natural language environment and the students don t used to the English culture background.

This article both elaborates the neccessity for teaching a foreign language and analyzes the importance of it s culture background,from the relations between language and culture,The influence culture bears on language is studied from the two main featwres of Japanese saluted expression and gender wording.