采用顶空固相微萃取-气质联用(solid phase micro-extration coupled with gas chromatography-mass spectrometry,SPME-GC-MS)技术,以黄酒的挥发性风味物质作为研究指标,比较了生麦曲、熟麦曲和混合曲酿造黄酒的挥发性风味物质的代谢...采用顶空固相微萃取-气质联用(solid phase micro-extration coupled with gas chromatography-mass spectrometry,SPME-GC-MS)技术,以黄酒的挥发性风味物质作为研究指标,比较了生麦曲、熟麦曲和混合曲酿造黄酒的挥发性风味物质的代谢差异。结果表明,生麦曲、熟麦曲和混合曲酿造的黄酒在挥发性风味物质的含量和种类上存在一定差异;采用电子鼻和电子舌对3组黄酒的滋味区分得知,熟麦曲和混合曲酿造黄酒的风味相似,但它们与生麦曲酿造黄酒的风味具有明显差异;通过主成分分析得知,高级醇和乙酯类物质的代谢差异是影响生麦曲、熟麦曲和混合曲酿造黄酒风味差异的主要因素,包括异戊醇、苯乙醇、异丁醇、乙酸乙酯、正己酸乙酯、月桂酸乙酯、辛酸乙酯、癸酸乙酯、乙酸异戊酯、苯甲酸乙酯、十四酸乙酯、软脂酸乙酯、油酸乙酯和亚油酸乙酯。研究结果初步阐明了生麦曲和熟麦曲在酿造黄酒的风味代谢差异,确定了主要的差异风味物质,为控制黄酒工业化生产过程中的风味提供了理论基础。展开更多
This paper focuses on the simulation and test of the switched reluctance starter/generator systems. Through the emulational analysis of the initial starting torque, the optimal turn-on section of the power switches is...This paper focuses on the simulation and test of the switched reluctance starter/generator systems. Through the emulational analysis of the initial starting torque, the optimal turn-on section of the power switches is discovered. The fundamental theory of the generating operation is analyzed with the linearity model, and a new method is presented based on voltage pulse width modulation for the generating mode control. Through the steady-state and optimized emulation of the output power and system efficiency, the optimizational control approach for the generating mode over a wide speed range is introduced. At last, the test of the 3KW prototype system shows that the dynamic and static performance of this system is fine.展开更多
文摘采用顶空固相微萃取-气质联用(solid phase micro-extration coupled with gas chromatography-mass spectrometry,SPME-GC-MS)技术,以黄酒的挥发性风味物质作为研究指标,比较了生麦曲、熟麦曲和混合曲酿造黄酒的挥发性风味物质的代谢差异。结果表明,生麦曲、熟麦曲和混合曲酿造的黄酒在挥发性风味物质的含量和种类上存在一定差异;采用电子鼻和电子舌对3组黄酒的滋味区分得知,熟麦曲和混合曲酿造黄酒的风味相似,但它们与生麦曲酿造黄酒的风味具有明显差异;通过主成分分析得知,高级醇和乙酯类物质的代谢差异是影响生麦曲、熟麦曲和混合曲酿造黄酒风味差异的主要因素,包括异戊醇、苯乙醇、异丁醇、乙酸乙酯、正己酸乙酯、月桂酸乙酯、辛酸乙酯、癸酸乙酯、乙酸异戊酯、苯甲酸乙酯、十四酸乙酯、软脂酸乙酯、油酸乙酯和亚油酸乙酯。研究结果初步阐明了生麦曲和熟麦曲在酿造黄酒的风味代谢差异,确定了主要的差异风味物质,为控制黄酒工业化生产过程中的风味提供了理论基础。
文摘This paper focuses on the simulation and test of the switched reluctance starter/generator systems. Through the emulational analysis of the initial starting torque, the optimal turn-on section of the power switches is discovered. The fundamental theory of the generating operation is analyzed with the linearity model, and a new method is presented based on voltage pulse width modulation for the generating mode control. Through the steady-state and optimized emulation of the output power and system efficiency, the optimizational control approach for the generating mode over a wide speed range is introduced. At last, the test of the 3KW prototype system shows that the dynamic and static performance of this system is fine.
