Spring water but not double-distilled water was exposed, in darkness, to a temporally patterned weak magnetic field that has been shown to affect planarian behavior and slow the rate of cancer cell proliferation. Expo...Spring water but not double-distilled water was exposed, in darkness, to a temporally patterned weak magnetic field that has been shown to affect planarian behavior and slow the rate of cancer cell proliferation. Exposure to the magnetic field caused a reliable shift in the peak (longer) wave-length of ~10 nm for fluorescence emissions and a ~20% increase (~100 counts) in fluorescence intensity. Spectral analyses verified a shift of 5 and 10 nm, equivalent to ~1.5 × 10-20 J “periodicity” across the measured wavelengths, which could reflect a change in the an intrinsic energy as predicted by Del Giudice and Preparata and could correspond to two lengths of O-H bonds. Wrapping the water sample containers during exposure with copper foil, aluminum foil, or plastic altered these fluorescent profiles. The most conspicuous effect was the elimination of a ~280 nm peak in the UV-VIS emission spectra only for samples wrapped with copper foil but not aluminum or plastic. These results suggest that weak magnetic fields produce alterations in the water-ionic complexes sufficient to be reliably measured by spectrophotometry. Because the effect was most pronounced when the spring water was exposed in darkness and was not disturbed the role of thixotropic phenomena and Del Giudice entrapment of magnetic fields within coherent domains of Pollack virtual exclusion zones (EZ) may have set the conditions for subsequent release of the energy as photons.展开更多
[目的]在高度取向碳纳米管(SA-CNTs)薄膜表面均匀地镀上一层铜可以提高其电磁屏蔽性能,为其在柔性电路板、高速微处理器、雷达反射装置、移动通信设备等方面的应用奠定基础。[方法]首先对SA-CNTs薄膜表面进行碱性除油,然后采用多巴胺预...[目的]在高度取向碳纳米管(SA-CNTs)薄膜表面均匀地镀上一层铜可以提高其电磁屏蔽性能,为其在柔性电路板、高速微处理器、雷达反射装置、移动通信设备等方面的应用奠定基础。[方法]首先对SA-CNTs薄膜表面进行碱性除油,然后采用多巴胺预活化,在SA-CNTs薄膜上形成一层聚多巴胺层,为后续AgNO3活化提供更多的活化基点,并且由于聚多巴胺的还原性,AgNO3能够在SA-CNTs薄膜上直接形成纳米银微粒,有助于化学镀铜时快速起镀,最终在SA-CNTs薄膜表面获得均匀、致密的金属铜层。采用扫描电子显微镜(SEM)、能谱仪(EDS)和接触角测量仪研究了多巴胺预活化对化学镀铜的影响。通过正交试验优化了化学镀铜工艺,分析了较优工艺条件下所得Cu镀覆SA-CNTs薄膜的表面形貌、相结构和电磁屏蔽性能。[结果]经多巴胺预活化的SA-CNTs薄膜表面可有效快速地进行化学镀铜反应,施镀过程中镀液性能稳定,所得Cu镀层结合力良好,在4~18 GHz频段的平均电磁屏蔽效能达到103.07 d B。[结论]多巴胺预活化有利于促进SA-CNTs薄膜表面化学镀铜,提高薄膜的电磁屏蔽性能,值得在柔性电路板制作方面推广应用。展开更多
为了研究高压输电系统电力变压器铜屏蔽中涡流损耗的分布,基于TEAM Problem 21基准族中的P21c-EM1简化模型进行了详细的实验研究与仿真分析。采用不同的建模方法对多种工况下激励线圈欧姆损耗进行计算并与测量值对比,得出线圈整体建模...为了研究高压输电系统电力变压器铜屏蔽中涡流损耗的分布,基于TEAM Problem 21基准族中的P21c-EM1简化模型进行了详细的实验研究与仿真分析。采用不同的建模方法对多种工况下激励线圈欧姆损耗进行计算并与测量值对比,得出线圈整体建模无法计算漏磁通在导体本身产生的涡流损耗,线圈单匝建模可以很好地反应实际工况。系统地介绍了变压器结构件杂散损耗传统测量方法以及分析了其缺陷,基于传统的测量方法介绍了一种新的测量方法,即采用实验模型总的损耗测量值减去实验模型中激励线圈损耗的精确计算值得出结构件中的损耗。多种激励条件下铜屏蔽中涡流损耗的计算值与测量值具有较好的一致性,从而验证了该方法的有效性。所得的结果、结论有助于电力变压器、平波电抗器等装置屏蔽结构的优化设计。展开更多
文摘Spring water but not double-distilled water was exposed, in darkness, to a temporally patterned weak magnetic field that has been shown to affect planarian behavior and slow the rate of cancer cell proliferation. Exposure to the magnetic field caused a reliable shift in the peak (longer) wave-length of ~10 nm for fluorescence emissions and a ~20% increase (~100 counts) in fluorescence intensity. Spectral analyses verified a shift of 5 and 10 nm, equivalent to ~1.5 × 10-20 J “periodicity” across the measured wavelengths, which could reflect a change in the an intrinsic energy as predicted by Del Giudice and Preparata and could correspond to two lengths of O-H bonds. Wrapping the water sample containers during exposure with copper foil, aluminum foil, or plastic altered these fluorescent profiles. The most conspicuous effect was the elimination of a ~280 nm peak in the UV-VIS emission spectra only for samples wrapped with copper foil but not aluminum or plastic. These results suggest that weak magnetic fields produce alterations in the water-ionic complexes sufficient to be reliably measured by spectrophotometry. Because the effect was most pronounced when the spring water was exposed in darkness and was not disturbed the role of thixotropic phenomena and Del Giudice entrapment of magnetic fields within coherent domains of Pollack virtual exclusion zones (EZ) may have set the conditions for subsequent release of the energy as photons.
文摘[目的]在高度取向碳纳米管(SA-CNTs)薄膜表面均匀地镀上一层铜可以提高其电磁屏蔽性能,为其在柔性电路板、高速微处理器、雷达反射装置、移动通信设备等方面的应用奠定基础。[方法]首先对SA-CNTs薄膜表面进行碱性除油,然后采用多巴胺预活化,在SA-CNTs薄膜上形成一层聚多巴胺层,为后续AgNO3活化提供更多的活化基点,并且由于聚多巴胺的还原性,AgNO3能够在SA-CNTs薄膜上直接形成纳米银微粒,有助于化学镀铜时快速起镀,最终在SA-CNTs薄膜表面获得均匀、致密的金属铜层。采用扫描电子显微镜(SEM)、能谱仪(EDS)和接触角测量仪研究了多巴胺预活化对化学镀铜的影响。通过正交试验优化了化学镀铜工艺,分析了较优工艺条件下所得Cu镀覆SA-CNTs薄膜的表面形貌、相结构和电磁屏蔽性能。[结果]经多巴胺预活化的SA-CNTs薄膜表面可有效快速地进行化学镀铜反应,施镀过程中镀液性能稳定,所得Cu镀层结合力良好,在4~18 GHz频段的平均电磁屏蔽效能达到103.07 d B。[结论]多巴胺预活化有利于促进SA-CNTs薄膜表面化学镀铜,提高薄膜的电磁屏蔽性能,值得在柔性电路板制作方面推广应用。
文摘为了研究高压输电系统电力变压器铜屏蔽中涡流损耗的分布,基于TEAM Problem 21基准族中的P21c-EM1简化模型进行了详细的实验研究与仿真分析。采用不同的建模方法对多种工况下激励线圈欧姆损耗进行计算并与测量值对比,得出线圈整体建模无法计算漏磁通在导体本身产生的涡流损耗,线圈单匝建模可以很好地反应实际工况。系统地介绍了变压器结构件杂散损耗传统测量方法以及分析了其缺陷,基于传统的测量方法介绍了一种新的测量方法,即采用实验模型总的损耗测量值减去实验模型中激励线圈损耗的精确计算值得出结构件中的损耗。多种激励条件下铜屏蔽中涡流损耗的计算值与测量值具有较好的一致性,从而验证了该方法的有效性。所得的结果、结论有助于电力变压器、平波电抗器等装置屏蔽结构的优化设计。
