The contrast study of I-V characteristics of solar cell under solar trough concentrating and ordinary illumination
In order to exploit system of heat and power,in the trough concentrating system,the testing system of heat and power was designed,and I-V characteristics of solar cell under solar concentrating condition were tested.The results showed that the voltage of ordinary solar cell changed very little,but the electric current enlarged about 4.1 times,and I-V characteristics of solar cell accorded with linearity relation.
This paper reviews the characteristics of students entering initial training in four countries?Ghana, Lesotho, Malawi, and Trinidad and Tobago. First a brief overview of the teacher education systems is provided. Second, biographical data is reviewed on age, religious affiliation, ethnic group and mother tongue, parental occupations and academic achievement, and students? educational qualifications. Third, some insights into trainees? perceptions about teaching and the teaching profession are presented. Finally, comparisons are made for two countries on cross-sectional data comparing the perceptions of entering and exiting trainees and newly qualified teachers. The results draw attention to the qualities and perceptions that those on initial training programmes bring to the teacher education curriculum. They provide a reminder that teacher education curricula should recognise these characteristics and be designed to respond to needs that they create.