The instructional multimedia teaching effectiveness significantly enhances teaching quality that it does not simply break through the restriction on time and space, but could also receive immediate learning achievement, assist in traditional instruction, and provide learners with diverse learning and innovation ability. The advantage of instructional multimedia becomes the mainstream of education. With nonequivalent pretest posttest control group design, 198 students of Chongqing University of Education is proceeded the 15-week (3 hours per week for total 45 hours) teaching experiment. The research results reveal remarkable effects of 1.instructional multimedia on learning effect, 2.instructional multimedia on learning gain, 3.Situational Approach on learning effect, 4.Situational Approach on learning gain, 5.instructional multimedia integrated Situational Approach on the promotion of learning effect, and 6.instructional multimedia integrated Situational Approach on the enhancement of learning gain. According to the results, suggestions are proposed, expecting to provide students with the diverse and practical learning model to assist students in cultivating adequate basic abilities and allow students actively participating in discussions and solving problems in the instructional multimedia integrated Situational Approach teaching situation so as to enhance the learning motivation and promote the learning achievement.

The dynamic nonlinear system with saturation constraints and unknown information is studied to design a better control system. The controller of the general n-order affine nonlinear system is constructed utilizing the backstepping method and the improved radial basis function (RBF) that can approximate the unknown parameters. Then, the appropriate Lyapunov function is selected. The mature stability judgment theorem can prove that the designed system is semi-globally uniform and ultimately bounded. Finally, the controller is added to the system for the experiment on MATLAB. The experimental results show that the controller is reliable and the system output can approach the ideal value through the limited range of control signal. During the simulation, the reference value can be quickly tracked by the system output, and the tracking error is small only within 0.04. The proposed method can provide a reference for the design of control systems in practical engineering.

No abstract

No abstract