Scientific teaching quality evaluation system and the effective operation mechanism have a positive meaning for promoting teaching reform. Teachers’ specialization is the core of education, and is the starting point ...Scientific teaching quality evaluation system and the effective operation mechanism have a positive meaning for promoting teaching reform. Teachers’ specialization is the core of education, and is the starting point and end-result of education reform. Teachers’ professional development has three kinds of orientation rational orientation, reflection-evaluation orientation, and ecological orientation. Some new research suggests that re？ ection-evaluation orientation is the best way to improve teachers’ professional abilities. At present, reflective teacher education has become worldwide trend. Compared with experiential teaching, reflective teaching is a sort of positive tool which is used to help teachers conduct their active and professional work. The main purpose of reflective teaching is to allow teachers to reffect on their own work and self-evaluation, and improve their methodology, eventually improve teaching methods and promote student learning. Nevertheless, there are many problems in the teaching quality evaluation system in the aspects of concept, subject, standard, organization, etc. Therefore, we have to reffect and reconstruct the teaching quality evaluation system in colleges and universities.展开更多
在土地质量评价前,为了使未采样的空白图斑有一个最接近实际的值,需要对赋值方法进行研究,可以最大程度地保证评价结果的合理性和真实性。选取1 km 2赋值研究区,采集样品30件,利用三种不同赋值方法进行赋值评价,研究结果表明按照耕园草...在土地质量评价前,为了使未采样的空白图斑有一个最接近实际的值,需要对赋值方法进行研究,可以最大程度地保证评价结果的合理性和真实性。选取1 km 2赋值研究区,采集样品30件,利用三种不同赋值方法进行赋值评价,研究结果表明按照耕园草图斑10件/km 2的采样密度,开展屈家岭管理区1∶5万土地质量地球化学调查,利用距离加权反比法或者移动平均法对全区图斑进行赋值,能够满足土地质量评价的要求,进而开展土地质量分等定级评价工作。展开更多
A new, simple and reliable method using HPLC-UV-ELSD was developed to generate the fingerprint of Ophiopogonis Radix. Homoisoflavonoids and steroidal saponins were determined simultaneously in a single run. A total of...A new, simple and reliable method using HPLC-UV-ELSD was developed to generate the fingerprint of Ophiopogonis Radix. Homoisoflavonoids and steroidal saponins were determined simultaneously in a single run. A total of 27 Ophiopogonis Radix samples were analyzed, and 18 reference substances were used for the identification of the common peaks. The fingerprint was further analyzed by chemometrics methods including similarity analysis （SA）, hierarchical clustering analysis （HCA） and principal component analysis （PCA）. The results indicated that the combination of chromatographic fingerprint and chemometrics analysis could be used for the geographical differentiation and quality evaluation of Ophiopognnis Radix.展开更多
文摘Scientific teaching quality evaluation system and the effective operation mechanism have a positive meaning for promoting teaching reform. Teachers’ specialization is the core of education, and is the starting point and end-result of education reform. Teachers’ professional development has three kinds of orientation rational orientation, reflection-evaluation orientation, and ecological orientation. Some new research suggests that re？ ection-evaluation orientation is the best way to improve teachers’ professional abilities. At present, reflective teacher education has become worldwide trend. Compared with experiential teaching, reflective teaching is a sort of positive tool which is used to help teachers conduct their active and professional work. The main purpose of reflective teaching is to allow teachers to reffect on their own work and self-evaluation, and improve their methodology, eventually improve teaching methods and promote student learning. Nevertheless, there are many problems in the teaching quality evaluation system in the aspects of concept, subject, standard, organization, etc. Therefore, we have to reffect and reconstruct the teaching quality evaluation system in colleges and universities.
文摘在土地质量评价前,为了使未采样的空白图斑有一个最接近实际的值,需要对赋值方法进行研究,可以最大程度地保证评价结果的合理性和真实性。选取1 km 2赋值研究区,采集样品30件,利用三种不同赋值方法进行赋值评价,研究结果表明按照耕园草图斑10件/km 2的采样密度,开展屈家岭管理区1∶5万土地质量地球化学调查,利用距离加权反比法或者移动平均法对全区图斑进行赋值,能够满足土地质量评价的要求,进而开展土地质量分等定级评价工作。
基金National Key Technology R&D Program"New Drug Innovation" of China (Grant No. 2012ZX09304-005,2012ZX09301002-002-002)
文摘A new, simple and reliable method using HPLC-UV-ELSD was developed to generate the fingerprint of Ophiopogonis Radix. Homoisoflavonoids and steroidal saponins were determined simultaneously in a single run. A total of 27 Ophiopogonis Radix samples were analyzed, and 18 reference substances were used for the identification of the common peaks. The fingerprint was further analyzed by chemometrics methods including similarity analysis （SA）, hierarchical clustering analysis （HCA） and principal component analysis （PCA）. The results indicated that the combination of chromatographic fingerprint and chemometrics analysis could be used for the geographical differentiation and quality evaluation of Ophiopognnis Radix.
