No abstract

For multi-beam trend surface imaging, a polynomial is typically created according to the least squares method to fit a surface similar to the actual data. However, in the filtering process, the fitting result will be different from the real situation due to the particularity of some seabed planes. In order to make the surface fit closer to the actual terrain, the curvature correction can be introduced to correct the error. On the basis of comparing the local curvature of the fitted surface with the local curvature of the actual data, a new curvature correction is obtained, and a new trend plane filtering method is proposed by using the new curvature correction. The effectiveness of the new method is verified by MATLAB simulation. The effect is shown in Figure 2. This method can better preserve the local characteristics of the surface.

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University LGBT students' wellbeing and university students' attitudes on LGBT issues have drawn wide attentions in recent years. In light of this background, this paper aims to investigate LGBT students' participation in university cultural activities from three perspectives: the organizer's perspective, the audience perspective and the LGBT performer's perspective. Typically, we choose the New Year Gala of the School of English of Sichuan International Studies University as the studying case. Considering the fact that the number of LGBT references related to specific campus activities in China are limited, it is a particularly new approach with college students' value judgments descriptions. It helps us understand the value judgements of the three types of people on LGBT expressions in cultural activities. One of the activity organizers offered us a detailed plan and his record of the activity. To understand the audience's perspective, this research also conducted an online survey questionnaire with a sample of 75 college students from Sichuan International Studies University. In addition, a semi-structured interview was conducted to understand the gay performer's perspective. The organizer's record, the interview and the questionnaire yield similar results with some variations. The organizer observed a generally friendly climate in the student union, the audience held neutral attitudes toward LGBT issues and supported LGBT expressions in the performance and the performer reported positive feedbacks on his stage experience. Based on the analysis, the climate in the target activity is relatively friendly toward LGBT students in the context of the target university. These results shed light for feature cross-regional comparative studies and studies to further explore the social mechanisms that cause the results.