| 1. | But the mechanism of the biological effects of elf - emf is still unclear
然而极低频电磁场生物效应的机制仍不明确。 |
| 2. | Development of the generation health in the low frequence electromagnetic field
低频电磁场对生殖健康影响的研究进展 |
| 3. | So the related mechanism studies of the cellular signal transduction have advantages for investigating biological effects of ele - emf
对极低频电磁场信号转导过程的研究，有利于揭示其生物效应的机制。 |
| 4. | However , evidence is accumulating that exposure to extremely low frequency electromagnetic field may produce a lot of biological effects
然而越来越多的研究提示，极低频电磁场可引起有害的生物效应。 |
| 5. | Labour environment monitoring technoligical specification of electric power industry part 7 : monitoring of very pow frequency electromagnetic fields
电力行业劳动环境监测技术规范第7部分:极低频电磁场监测 |
| 6. | Elf - emf is also a physical factor . we suppose that these signal pathways may mediate 50hz magnetic field ( mf ) signals in cells
极低频电磁场是环境中的一种物理应激因子，因此推测极低频电磁场的生物效应与该途径间存在一定的联系。 |
| 7. | Low - frequency electromagnetic fields in our environment often have little energy to directly traverse the membrane , and act with biological molecules , or damage the dna
环境中极低频电磁场通常因能量较低而难以直接与生物大分子作用或导致dna损伤，引发突变、畸变及断裂等效应。 |
| 8. | By means of numerical computations , the thesis investigated the stability and the absorbing property of the pml absorbing boundary condition . in addition , the thesis also gives a lot of numerical results and some practical conclusions to facilitate the application of the proposed fdtd method
通过数值计算，分析了二维、三维伪低频电磁场计算中pml吸收边界条件的稳定性和吸收性，给出了大量的数值计算结果和一些有价值的计算结论。 |
| 9. | To overcome the drawback of the fdtd method in computing the pseudo low frequency electromagnetic problems , in the final , based on comprehensive study on the present adi - fdtd method , the thesis proposed an improved 2d adi - fdtd method . the numerical results show that the proposed method is more unconditional stable and computationally accurate than the conventional adi - fdtd ones
针对传统的fdtd法分析伪低频电磁场问题时的不足，通过系统研究交替方向隐格式时域有限差分法，本文提出了一种改进的二维交替方向隐格式时域有限差分法，并编制了相应的计算软件。 |
| 10. | This thesis contributed to the comprehensive study of the finite - difference time - domain ( fdtd ) method and its application to the numerical computation of radiated electromagnetic fields in switched mode power supplies . the work includes mainly three parts : the study on the performance of pml absorbing boundary condition applied to pseudo low frequency electromagnetic problems ; the validation of the fdtd method with pml absorbing boundary conditions and the corresponding computer software based on the numerical study of the electromagnetic field of an electric dipole antenna , and its application to the numerical computation of radiated electromagnetic fields in switched mode power supplies ; the development of an improved alternating direction implicit finite - difference time - domain method
在综合前人工作基础上，本文对时域有限差分( fdtd )法及其在开关电源辐射电磁场数值计算中的应用进行了系统的分析和研究，其核心内容包括：伪低频电磁场数值计算中pml吸收边界条件性能的研究；基于基准问题?电偶极子天线三维辐射电磁场，验证了本文构造的基于pml吸收边界条件的三维fdtd法及其计算软件，并应用于高频开关电源辐射电磁场的数值分析；提出了一种改进的交替方向隐格式时域有限差分法。 |
