This paper discusses the widely existing problems of increasing demand of professional engineer in electronic science major and the backward of the teaching mode at present. From one specialized course “Virtual Instrument technique and LABVIEW programming”, we explore the new group-teaching mode based on the Virtual Instrument technique, and then the Specific measures and implementation procedures and effect of this teaching mode summarized in the end.
This paper is mainly introducing the exploration of the hierarchical teaching method for curriculum design of photoelectric discipline. Due to the primal problems which extensively exist in current teaching on curriculum design practical course, some new suggestions are discussed in the aspects of teaching contents, experimental schemes, instruction modes and assessment methods. The curriculum design practical course should be updated with the professional hot spots. Combining the big class oriented instruction and group instruction, a hierarchical teaching mode is established, which implements layered training with a wide range for all students. With all of these efforts the teaching method of curriculum design practical course can be improved.
In practical course teaching based on project object method, the traditional evaluation methods include class attendance, assignments and exams fails to give incentives to undergraduate students to learn innovatively and autonomously. In this paper, the element such as creative innovation, teamwork, document and reporting were put into process evaluation methods, and a process evaluation model was set up. Educational practice shows that the evaluation model makes process evaluation of students' learning more comprehensive, accurate, and fairly.
The range of the accuracy of scalar diffraction theory and effective medium theory for binary rectangular groove phase grating is evaluated by the comparison of diffraction efficiencies predicted from scalar theory and effective medium theory, respectively, to exact vector results calculated by Fourier modal method. The effect of element parameters (depth, period, index of refraction, angle of incidence, and fill factor) on the accuracy of scalar treatment and effective medium theory is quantitatively determined. Generally, it is found that the scalar method is valid when the normalized period is more than fourfold wavelength of incident light at normal incidence. The error of transmittances between vector method and scalar method increases as the incident angle and refractive index increase. Furthermore, when the higher diffraction orders other than zero-th order are not to propagate, the effective medium theory is accurate to evaluate the transmittance of grating at normal incidence. The error of transmittances between effective medium method and rigorous vector theory increases as the incident angle and refractive index increase. Also, the error of diffraction efficiencies between the simple methods and the vector method on the polarization state of incident light is clearly demonstrated.
The theory of mesopic vision provides an important theoretical foundation for the choice of road lighting sources. Based
upon a number of recent mesopic photometry studies, an equation (<i>E</i><sub><i>mes</i></sub> = <i>B</i>•<i>E</i><sub><i>P</i></sub>) to deduce from the <i>E</i><sub><i>p</i></sub> (photopic
illumination) to Emes (mesopic equivalent illumination) is proposed, where <i>B</i> is instant for modified coefficient. The
coefficient <i>B</i> can be used easily to calculate the mesopic equivalent illumination by using the measuring results of
photopic illumination for different correlated color temperature (CCT) light sources under mesopic light levels. Using
the equation, we analyze the variation of coefficient <i>B</i> with background lighting level of the different correlated color
temperature lighting sources under mesopic vision levels. By calculating the mesopic equivalent illumination of the
different sources, our results showing that the higher correlated color temperature LED sources have better visual effects.
Moreover, the results provide a basis for further studies on the illuminometer, which might be suitable for mesopic vision.