基于半监督学习理论的水下目标识别系统能够从未知类别测试集中识别出已学习类别测试样本,并拒判未学习类别测试样本。描述并讨论了两种基于支持向量数据描述(Support Vector Data Description,SVDD)的半监督水下目标识别算法:半监督SVD...基于半监督学习理论的水下目标识别系统能够从未知类别测试集中识别出已学习类别测试样本,并拒判未学习类别测试样本。描述并讨论了两种基于支持向量数据描述(Support Vector Data Description,SVDD)的半监督水下目标识别算法:半监督SVDD与半监督SVDD集成。利用四类实测水下目标样本进行实验,训练样本为三类已知类别样本,测试样本为四类样本,包含一类未学习类别样本。对两种算法实验结果进行比较,表明半监督SVDD集成算法比半监督SVDD算法能更好地识别已学习类别测试样本,并能有效拒判未学习类别测试样本,不足之处为时间消耗与过程复杂程度比半监督SVDD算法高。展开更多
This work aims to understand the relationship between the member angle limit and the energy ratio for 24 test samples of composite beams and CFT square steel tube columns. This work also compares the formula applicabi...This work aims to understand the relationship between the member angle limit and the energy ratio for 24 test samples of composite beams and CFT square steel tube columns. This work also compares the formula applicability for member angle limit with the previous test result to provide the basic data for the design of composite beam-CFT column. The evaluation of the member angle limit was performed with concrete compressive strength (fC =22.16 MPa, 30.49 MPa), breadth-to-thickness ratio (B/t=25.0, 33.3, 43.5), and axial capacity ratio (N/N0=0, 0.3, 0.4, 0.5) as the main variables of the test samples. For the relationship between the member angle limit (Ru) and the energy ratio (ES/EC ), the test result shows that the energy ratio becomes lower as the axial capacity ratio and the breadth-to-thickness ratio increase. The energy ratio is lower for the Type B test sample compared with that of Types A and C. For the formula suggested by SATO, the test samples are distributed evenly for comparison between test values and the member angle limit; however, other formulas indicate a deviation. Specifically, for the comparison between R u,cal and R u (Test), Maeda's formula shows severe deviation.展开更多
Jinmudan,a new tea variety from Fujian Province has an excellent quality with a unique aroma like magnolia frogrance.To monitor the changes in the tea volatile compounds during the Jinmudan Oolong tea manufacturing(dr...Jinmudan,a new tea variety from Fujian Province has an excellent quality with a unique aroma like magnolia frogrance.To monitor the changes in the tea volatile compounds during the Jinmudan Oolong tea manufacturing(drying) process,the volatiles of tea samples were extracted and analyzed.Characteristic volatile compounds in Jinmudan Oolong tea were nerolidol,α-farnesene,linolenic acid,palmitic acid,indole,phenylacetaldehyde,cisjasmone,β-phenylethanol,etc.The content of nerolidol was the highest in four tested samples.The composition of the volatile compounds in microwave drying sample was simple,but its concentration was high,in which the main volatile compounds were alcohols and esters.The processing with combination of traditional drying craft and modern aroma-improvement technique could obviously improve the tea aroma,especially in level of epoxy linalool and jasmine lactone.展开更多
文摘基于半监督学习理论的水下目标识别系统能够从未知类别测试集中识别出已学习类别测试样本,并拒判未学习类别测试样本。描述并讨论了两种基于支持向量数据描述(Support Vector Data Description,SVDD)的半监督水下目标识别算法:半监督SVDD与半监督SVDD集成。利用四类实测水下目标样本进行实验,训练样本为三类已知类别样本,测试样本为四类样本,包含一类未学习类别样本。对两种算法实验结果进行比较,表明半监督SVDD集成算法比半监督SVDD算法能更好地识别已学习类别测试样本,并能有效拒判未学习类别测试样本,不足之处为时间消耗与过程复杂程度比半监督SVDD算法高。
基金supported by the Basic Science Research Program of the National Research Foundation of Korea (NRF) and funded by the Ministry of Education,Science and Technology (2011-0009227)
文摘This work aims to understand the relationship between the member angle limit and the energy ratio for 24 test samples of composite beams and CFT square steel tube columns. This work also compares the formula applicability for member angle limit with the previous test result to provide the basic data for the design of composite beam-CFT column. The evaluation of the member angle limit was performed with concrete compressive strength (fC =22.16 MPa, 30.49 MPa), breadth-to-thickness ratio (B/t=25.0, 33.3, 43.5), and axial capacity ratio (N/N0=0, 0.3, 0.4, 0.5) as the main variables of the test samples. For the relationship between the member angle limit (Ru) and the energy ratio (ES/EC ), the test result shows that the energy ratio becomes lower as the axial capacity ratio and the breadth-to-thickness ratio increase. The energy ratio is lower for the Type B test sample compared with that of Types A and C. For the formula suggested by SATO, the test samples are distributed evenly for comparison between test values and the member angle limit; however, other formulas indicate a deviation. Specifically, for the comparison between R u,cal and R u (Test), Maeda's formula shows severe deviation.
基金supported by the rural science and technology innovation fund project of technology division from Ningbo city science and technology bureau (No.201001C8002011,201002C1011003)
文摘Jinmudan,a new tea variety from Fujian Province has an excellent quality with a unique aroma like magnolia frogrance.To monitor the changes in the tea volatile compounds during the Jinmudan Oolong tea manufacturing(drying) process,the volatiles of tea samples were extracted and analyzed.Characteristic volatile compounds in Jinmudan Oolong tea were nerolidol,α-farnesene,linolenic acid,palmitic acid,indole,phenylacetaldehyde,cisjasmone,β-phenylethanol,etc.The content of nerolidol was the highest in four tested samples.The composition of the volatile compounds in microwave drying sample was simple,but its concentration was high,in which the main volatile compounds were alcohols and esters.The processing with combination of traditional drying craft and modern aroma-improvement technique could obviously improve the tea aroma,especially in level of epoxy linalool and jasmine lactone.
