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提出并建立了制造纯GeO2空芯光纤的方法,研制的纯GeO2空芯光纤的输出功率达到18W,损耗为1.23dB/m,论述了该光纤的传输激光能量的原理,探讨了光纤的传输损耗和应用领域. 相似文献
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1 INTRODUCTIONSince the first report on the reduction of lead by sodium to a green solution in 1891 by Johannis, polyanionic clusters of post-transition metals known as Zintl ions have attracted much attention in chemistry due to their beautiful molecules, diverse reactivity and potential applications[1, 2]. Polyphos- phide anions represent one of the most important classes of zintl ions. The binary alkali-metal poly- phosphides, such as MI4P6 (M = K, Rb, Cs)[3~5], MI3P7 (M = Li-Cs)… 相似文献
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选取宁波地区典型的软土基坑工程进行土压力现场实测研究,探讨了主动、被动土压力随时间、深度的变化规律.利用实测土压力值与围护结构位移曲线,采用双曲线模拟主动土压力与位移之间的关系,从而建立了土压力与位移关系的经验公式,并利用实测数据对土压力公式的可靠性进行了验证.最后,根据实测数据初步绘制了宁波软土基坑土压力的包络图,可为宁波地区软土基坑设计提供借鉴和参考. 相似文献
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A new bismuth compound Bi(Hsal)3(1,10-phenanthroline) (Hsal = O2CC6H4-2-OH) has been synthesized and characterized by single-crystal X-ray diffraction. It crystallizes in the triclinic system, space group P1, with a = 10.243(2), b = 11.905(3), c = 12.934(3) A, α= 76.780(6), β= 68.683(6),γ= 80.930(7)°, V = 1425.6(5) A^3, Dc = 1.865 g/cm^3, Mr = 800.51, F(000) = 780, μ= 6.247 mm^-1, Z = 2, R = 0.0456 and wR = 0.1131 for 5612 observed reflections (I 〉 2σ(I)). In this compound, three salicylate ligands coordinate to the Bi atom through the carboxylate groups to form a four-membered chelate ring, and phenanthroline ligand chelates the metal through two N atoms. The structure of the title compound manifests a possible coordination mode between bismuth subsalicylate and N atom containing amino acid in the biological system. 相似文献
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为研究表面微结构对液滴三相线移动行为的影响,采用标准MEMS工艺在硅基表面加工出了具有不同尺寸及间距的柱状微结构疏水表面。通过多角度光学可视化实验系统,研究了液滴蒸发时,不同微结构区域内液滴三相线移动行为,分析了微结构尺寸及间距对三相线移动特性和蒸发模式的影响。结果表明:处于不同微结构阵列上的液滴在蒸发过程中将出现三相线的非对称移动,液滴两侧出现不同的蒸发模式,且在后退接触角较小的一侧出现了一种不同于目前三种蒸发模式的现象-三相线固定,接触角呈周期性锯齿状波动,最后基于能量原理分析了液滴三相线移动所需能量与后退接触角之间的联系,解释了产生上述行为的原因。 相似文献