Students often face difficulties while taking basic programming courses due to several factors. In response, research has presented subjective assessments for diagnosing learning problems to improve the teaching of pr...Students often face difficulties while taking basic programming courses due to several factors. In response, research has presented subjective assessments for diagnosing learning problems to improve the teaching of programming in higher education. In this paper, the authors propose an Object Oriented conceptual map model and organize this approach into three levels： constructing a Concept Effect Propagation Table, constructing Test Item-Concept Relationships and diagnosing Student Learning Problems with Matrix Composition. The authors＇ work is a modification of the approaches of Chert and Bai as well as Chu et al., as the authors use statistical methods, rather than fuzzy sets, for the authors＇ analysis. This paper includes a statistical summary, which has been tested on a small sample of students in King Abdulaziz University, Jeddah, Saudi Arabia, illustrating the learning problems in an Object Oriented course. The experimental results have demonstrated that this approach might aid learning and teaching in an effective way.展开更多
With the rapid development of China＇s higher education, higher education, popularization of increasingly rapid pace, the future number of people receiving higher education will grow exponentially. In the rapidly grow...With the rapid development of China＇s higher education, higher education, popularization of increasingly rapid pace, the future number of people receiving higher education will grow exponentially. In the rapidly growing scale of higher education at the same time, the quality of higher education has been a cause for concern This paper analyzes the current problems in the study of college students exist, and improvement measures put forward their own proposals.展开更多
With the rapid development of China＇s higher education, higher education, popularization of increasingly rapid pace, the future number of people receiving higher education will grow exponentially. In the rapidly grow...With the rapid development of China＇s higher education, higher education, popularization of increasingly rapid pace, the future number of people receiving higher education will grow exponentially. In the rapidly growing scale of higher education at the same time, the quality of higher education has been a cause for concern~ This paper analyzes the current problems in the study of college students exist, and improvement measures put forward their own proposals.展开更多
As one of the largest global public health problems, cancer greatly endangers human health. Researchers have been committed to discovering anticancer drugs with high efficiency and low toxicity. Shogaol, a kind of ing...As one of the largest global public health problems, cancer greatly endangers human health. Researchers have been committed to discovering anticancer drugs with high efficiency and low toxicity. Shogaol, a kind of ingredient from ginger with high anti-tumor activity, has attracted our attention. This study was an investigation on the composition and structure-activity relationship of different analogues of shogaol, with the purpose to screen for shogaol compounds which had higher anti-tumor activity and could be easily synthesized. We chose zingerone as the starting material to synthesize shogaol through four-step reactions without protective group, as a result, 31 analogues were synthesized for anti-tumor activity detect. The biological test results showed that： the missing of the unsaturated ketone and the phenolic hydroxyl group reduced the anti-tumor activity of shogaol; the site of phenolic hydroxyl had no significant influence on the anti-tumor activity, the indicating that the larger the steric hindrance of substituent, the lower the activity, but the higher the activity of cyclobutyl substituted derivatives.展开更多
文摘Students often face difficulties while taking basic programming courses due to several factors. In response, research has presented subjective assessments for diagnosing learning problems to improve the teaching of programming in higher education. In this paper, the authors propose an Object Oriented conceptual map model and organize this approach into three levels： constructing a Concept Effect Propagation Table, constructing Test Item-Concept Relationships and diagnosing Student Learning Problems with Matrix Composition. The authors＇ work is a modification of the approaches of Chert and Bai as well as Chu et al., as the authors use statistical methods, rather than fuzzy sets, for the authors＇ analysis. This paper includes a statistical summary, which has been tested on a small sample of students in King Abdulaziz University, Jeddah, Saudi Arabia, illustrating the learning problems in an Object Oriented course. The experimental results have demonstrated that this approach might aid learning and teaching in an effective way.
文摘With the rapid development of China＇s higher education, higher education, popularization of increasingly rapid pace, the future number of people receiving higher education will grow exponentially. In the rapidly growing scale of higher education at the same time, the quality of higher education has been a cause for concern This paper analyzes the current problems in the study of college students exist, and improvement measures put forward their own proposals.
文摘With the rapid development of China＇s higher education, higher education, popularization of increasingly rapid pace, the future number of people receiving higher education will grow exponentially. In the rapidly growing scale of higher education at the same time, the quality of higher education has been a cause for concern~ This paper analyzes the current problems in the study of college students exist, and improvement measures put forward their own proposals.
文摘As one of the largest global public health problems, cancer greatly endangers human health. Researchers have been committed to discovering anticancer drugs with high efficiency and low toxicity. Shogaol, a kind of ingredient from ginger with high anti-tumor activity, has attracted our attention. This study was an investigation on the composition and structure-activity relationship of different analogues of shogaol, with the purpose to screen for shogaol compounds which had higher anti-tumor activity and could be easily synthesized. We chose zingerone as the starting material to synthesize shogaol through four-step reactions without protective group, as a result, 31 analogues were synthesized for anti-tumor activity detect. The biological test results showed that： the missing of the unsaturated ketone and the phenolic hydroxyl group reduced the anti-tumor activity of shogaol; the site of phenolic hydroxyl had no significant influence on the anti-tumor activity, the indicating that the larger the steric hindrance of substituent, the lower the activity, but the higher the activity of cyclobutyl substituted derivatives.
