在分析液压系统能量损失的基础上,建立了系统的能量损失表达式。以单执行元件的液压系统为研究对象,绘制了系统图谱,包括1个非节能的系统(No Energy Saving,NES)和14个采取了不同节能措施的系统(Energy Saving,ES)。在工作参数相同的条...在分析液压系统能量损失的基础上,建立了系统的能量损失表达式。以单执行元件的液压系统为研究对象,绘制了系统图谱,包括1个非节能的系统(No Energy Saving,NES)和14个采取了不同节能措施的系统(Energy Saving,ES)。在工作参数相同的条件下,计算了NES和ES系统在待命、工作(快进、工进、保压)和快退时的功率损失。分析对比说明:就液压系统本身而言,14个ES系统比NES系统相对减少功率损失为28.6%～99.04%。讨论了液压节能系统ES在工程应用中的相关问题。展开更多
The similarities of the non-linear chemical （NLC） fingerprints of Radix Glycyrrhizaes from four producing areas and eight other traditional Chinese medicines （TCMs） were calculated, using a systemic similarity cal...The similarities of the non-linear chemical （NLC） fingerprints of Radix Glycyrrhizaes from four producing areas and eight other traditional Chinese medicines （TCMs） were calculated, using a systemic similarity calculation method proposed and three other main calculation ones （Euclidean distance, correlation coefficient and included angle cosine）. All of the correlation coefficient similarities of different TCMs are higher than 0.952, and the included angle cosines are all higher than 0.962. So, both the conelation coefficient and included angle cosine similarities are unable to be used as the criteria for quantitatively evaluating the similarities of NLC fingerprints of TCMs. Although all of the Euclidean distance similarities of Berry Liquorices from four producing areas are less than 73, those of the other eight TCMs are all more than 180. The Euclidean distance cannot reflect the relative magnitudes of the feature differences in the NLC fingerprints very correctly. The systemic similarity method is the best among the four ones. All of the systemic similarities of Berry Liquorices from the four producing areas are higher than 0.962, while those of the other eight TCMs are all lower than 0.805, and the systemic similarity can reflect the differences between samples most faithfully, and can be used as a quantitative one evaluating the similarities of NLC fingerprints of TCMs, by which TCM could be distinguished and evaluated quickly, simply and exactly.展开更多
文摘在分析液压系统能量损失的基础上,建立了系统的能量损失表达式。以单执行元件的液压系统为研究对象,绘制了系统图谱,包括1个非节能的系统(No Energy Saving,NES)和14个采取了不同节能措施的系统(Energy Saving,ES)。在工作参数相同的条件下,计算了NES和ES系统在待命、工作(快进、工进、保压)和快退时的功率损失。分析对比说明:就液压系统本身而言,14个ES系统比NES系统相对减少功率损失为28.6%～99.04%。讨论了液压节能系统ES在工程应用中的相关问题。
基金Project(2009GJD20033) supported by the National Science and Technology Ministry of China
文摘The similarities of the non-linear chemical （NLC） fingerprints of Radix Glycyrrhizaes from four producing areas and eight other traditional Chinese medicines （TCMs） were calculated, using a systemic similarity calculation method proposed and three other main calculation ones （Euclidean distance, correlation coefficient and included angle cosine）. All of the correlation coefficient similarities of different TCMs are higher than 0.952, and the included angle cosines are all higher than 0.962. So, both the conelation coefficient and included angle cosine similarities are unable to be used as the criteria for quantitatively evaluating the similarities of NLC fingerprints of TCMs. Although all of the Euclidean distance similarities of Berry Liquorices from four producing areas are less than 73, those of the other eight TCMs are all more than 180. The Euclidean distance cannot reflect the relative magnitudes of the feature differences in the NLC fingerprints very correctly. The systemic similarity method is the best among the four ones. All of the systemic similarities of Berry Liquorices from the four producing areas are higher than 0.962, while those of the other eight TCMs are all lower than 0.805, and the systemic similarity can reflect the differences between samples most faithfully, and can be used as a quantitative one evaluating the similarities of NLC fingerprints of TCMs, by which TCM could be distinguished and evaluated quickly, simply and exactly.
