The lifting technique is now a well recognized tool for H∞ design and analysis of sampleddata systems. However, the efficiency of the method depends on the structure of the problem. The structure of the Ho sensitivit...The lifting technique is now a well recognized tool for H∞ design and analysis of sampleddata systems. However, the efficiency of the method depends on the structure of the problem. The structure of the Ho sensitivity problem is analyzed in this paper. And the constraints on the H∞-optimization problem and on the design parameters in lifting design are also discussed. Under such constraints the resulting performance from the design is generally low. Therefore, the lifting technique can not be recommended as a synthesis tool for the sampled-data systems. An example is also given in the paper.展开更多
Absolute light utilization efficiency across leaf section of Euonymus japonicus T. was calculated based on the measurements of photoacoustic technique (PA technique) and microscopic fiber optic probe. This new method ...Absolute light utilization efficiency across leaf section of Euonymus japonicus T. was calculated based on the measurements of photoacoustic technique (PA technique) and microscopic fiber optic probe. This new method was based on the principal of depth analysis by PA technique and the differential analysis of light gradients across leaf section by micro-optical probe technique. The depth analysis was shown by a sample of PA scan light absorption spectra. Results showed that the tissue layers between palisade tissue and spongy tissue used the smallest proportion of incident light energy for photochemical reactions (about 0.026% incident light energy of 660 nm light), while in tissue layer more close to the adaxial surface of leaf or the abaxial surface of leaf, the efficiency of utilization of light energy tended to be improved, e. g. 0.092% for tissue layers close to adaxial surface; 0.036% for tissue layers close to abaxial surface. The results that different leaf tissue layers utilized different proportion of incident light energy for photochemical reaction directly prove the hypothesis put forward by Han and Vogelmann.展开更多
在德国促进联合工业研究发展计划(IGF)的19617 N号研究项目中,制备了氮和磷取代的烷氧基硅烷,并对其抑制织物火势生长和蔓延的能力进行了研究。为此,采用不同的策略合成了一系列阻燃剂,包括用氨基三烷氧基硅烷和/或三聚氰胺对有机磷化...在德国促进联合工业研究发展计划(IGF)的19617 N号研究项目中,制备了氮和磷取代的烷氧基硅烷,并对其抑制织物火势生长和蔓延的能力进行了研究。为此,采用不同的策略合成了一系列阻燃剂,包括用氨基三烷氧基硅烷和/或三聚氰胺对有机磷化合物进行点击化学和亲核取代。采用轧-烘-焙工艺和溶胶-凝胶法,将新型无卤、无醛阻燃剂应用于棉(CO)、聚对苯二甲酸乙二醇酯(PET)、聚酰胺(PA)及其混纺织物上。阻燃效率通过EN ISO 15025测试方法评估。此外,通过附着在磷原子上的官能团或焙烘温度的优化,可控制阻燃剂的水溶性和耐洗性。总体而言,该项研究表明,N-P-硅烷是良好的纺织品耐久性阻燃剂。展开更多
文摘The lifting technique is now a well recognized tool for H∞ design and analysis of sampleddata systems. However, the efficiency of the method depends on the structure of the problem. The structure of the Ho sensitivity problem is analyzed in this paper. And the constraints on the H∞-optimization problem and on the design parameters in lifting design are also discussed. Under such constraints the resulting performance from the design is generally low. Therefore, the lifting technique can not be recommended as a synthesis tool for the sampled-data systems. An example is also given in the paper.
文摘Absolute light utilization efficiency across leaf section of Euonymus japonicus T. was calculated based on the measurements of photoacoustic technique (PA technique) and microscopic fiber optic probe. This new method was based on the principal of depth analysis by PA technique and the differential analysis of light gradients across leaf section by micro-optical probe technique. The depth analysis was shown by a sample of PA scan light absorption spectra. Results showed that the tissue layers between palisade tissue and spongy tissue used the smallest proportion of incident light energy for photochemical reactions (about 0.026% incident light energy of 660 nm light), while in tissue layer more close to the adaxial surface of leaf or the abaxial surface of leaf, the efficiency of utilization of light energy tended to be improved, e. g. 0.092% for tissue layers close to adaxial surface; 0.036% for tissue layers close to abaxial surface. The results that different leaf tissue layers utilized different proportion of incident light energy for photochemical reaction directly prove the hypothesis put forward by Han and Vogelmann.
文摘在德国促进联合工业研究发展计划(IGF)的19617 N号研究项目中,制备了氮和磷取代的烷氧基硅烷,并对其抑制织物火势生长和蔓延的能力进行了研究。为此,采用不同的策略合成了一系列阻燃剂,包括用氨基三烷氧基硅烷和/或三聚氰胺对有机磷化合物进行点击化学和亲核取代。采用轧-烘-焙工艺和溶胶-凝胶法,将新型无卤、无醛阻燃剂应用于棉(CO)、聚对苯二甲酸乙二醇酯(PET)、聚酰胺(PA)及其混纺织物上。阻燃效率通过EN ISO 15025测试方法评估。此外,通过附着在磷原子上的官能团或焙烘温度的优化,可控制阻燃剂的水溶性和耐洗性。总体而言,该项研究表明,N-P-硅烷是良好的纺织品耐久性阻燃剂。
