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HL22Aװ�õ��Ӳ�ϵͳ��ѹʵʱ�������ܷ��� 总被引:1,自引:1,他引:0
介绍了HL-2A装置低杂波加热系统中的低压部分实时保护系统的原理和工作情况。实时保护电路工作可靠,系统低压部份响应延迟时间小于1μs。在2004年的单只速调管实验中,对波导内拉弧打火,速调管管体电流和速调管集电极过流进行了实时保护,各个保护对象都有专用的探头进行测量,其中管体电流探头精度达到0.7%。实验信号的分析表明保护系统的设计达到了实验要求,有效地保护了实验对象。 相似文献
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We report for the first time the theoretical analysis and experimental results of a white-light reconstructed monochromatic
3-D image synthesizing tomograms by multiple rainbow holography with vertical-area partition (VAP) approach. The theoretical
and experimental results show that 3-D monochromatic image can be synthesized by recording the master hologram by VAP approach
without any distortions either in gray scale or in geometrical position. A 3-D monochromatic image synthesized from a series
of medical tomograms is presented in this paper for the first time 相似文献
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In order to shed light upon the nature and mechanism of 4f-3d magnetic exchange interactions, a series of binuclear complexes of lanthanide(3+) and chromium(3+) with the general formula [Ln(L)5(H2O)2Cr(CN)6]·mL· nH2O (Ln=La (1), Ce (2), Pr (3), Nd (4); x=5, y=2, m=1 or 2, n=2 or 2.5; L=2-pyrrolidinone) and [Ln(L)4(H2O)3Cr(CN)6] ·nH2O (Ln=Sm (5), Eu (6), Gd (7), Tb (8), Dy (9), Er (10); x=4, y=3, m=0, n= 1.5 or 2.0; L=2-pyrrolidinone) were prepared and the X-ray crystal structures of complexes 2, 6 and 7 were determined. All the compounds consist of a Ln-CN-Cr unit, in which Ln^3+ in a square antiprism environment is bridged to an octahedral coordinated Cr^3+ ion through a cyano group. The magnetic properties of the complexes 3 and 6-10 show an overall antiferromagnetic behavior. The fitting to the experimental magnetic susceptibilities of 7 give g= 1.98, J=0.40 cm^-1, zJ'= -0.21 cm^-1 on the basis of a binuclear spin system (Scd=7/2, Scr=3/2), revealing an intra-molecular Gd^3+-Cr^3+ ferromagnetic interaction and an inter-molecular antiferromagnetic interaction. For 7 the calculation of quantum chemical density functional theory (DFT), combined with the broken symmetry approach, showed that the calculated spin coupling constant was 20.3 cm^-1, supporting the observation of weak ferromagnetic intra-molecular interaction in 7. The spin density distributions of 7 in both the high spin ground state and the broken symmetry state were obtained, and the spin coupling mechanism between Gd^3+ and Cr^3+ was discussed. 相似文献
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一幅灰度图像的相息图被隐藏于一幅宿主图像中,该相息图是采用基于相息图迭代的双随机相位加密技术得到的.由于采用仅含有位相信息的相息图作为待加密灰度图像信息的载体,因而与隐藏图像同时具有振幅和相位信息的情况相比较,需要隐藏的信息量大大降低,从而可在对宿主图像影响较小的情况下,提高提取信息的质量;并可有效地提高信息提取时的光学效率,并且对二元图像信息的隐藏也同样适用.水印图像的剪切对隐藏信息提取质量的影响也被分析,模拟实验结果证明了所采用方法的有效性. 相似文献
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ECRH阳极高压电源系统由高压直流电源及调制器两部分组成。高压直流电源采用晶闸管调节升压变压器的输入电压,在低电位端利用三极管串联线性调整输出DC电压,控制器采用了内外双闭环控制技术,其最大输出为30kV/130mA;调制器使用真空四极管为核心部件。使用仿真软件对电路进行了优化设计。独立调试实验及HL-2A装置放电实验数据表明,该电源系统具有大范围调压、低纹波输出、快速调制等特点。 相似文献