• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>3rd International EMF Seminar in China: Electromagnetic Fields and Biological Effects; Oct 13-17, 2003; Guilin, China >FOR RADIATION OF PULSE ELECTROMAGNETIC WAVE
【24h】

FOR RADIATION OF PULSE ELECTROMAGNETIC WAVE

机译：脉冲电磁波的辐射

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

From the row result of SAR_(av1) shown in Table 1 it can be seen that even when there is not much difference in SAR_(avl), there can be significant difference in the internal SAR distributions. It shows significant increase occurred in the skin and eye when the frequency is increase, but it is decrease in the tissues inside the body model, such as muscle, intestine and heart. Compare the results of SAR_(av1) in different tissues at the same frequency, it can be seen the values of skin are significant. The SAR_(av1) values of brain are maximal at the frequency of 200, 400 and 600MHz. While the frequency is larger than 800MHz, the SAR_(av1) values of eye and skin are maximal. This is due to the fact that the higher rate of energy absorption for a high frequency does not allow much energy to penetrate to an organ that is located inside the body. From the whole point of view, it is further shown that the SARav1 distributions of some tissues are very high in some specific frequencies, such as SARav1 distributions of lung and spleen at 600MHz. This specific absorption is due to the wavecrest produced by the traveling waves and standing waves reflected on the tissue surface. Table 2 gives the SARav distributions in different tissues at different frequencies when exposed to the high-power electromagnetic pulse. It shows SARav distributions of brain, intestine, heart, stomach, pancreas, spleen, kidney and gall focus on the low frequencies. From the results displayed above, the perfect protective frequency band is 100-1000MHz. Moreover, because the greatly uneven SARav1 distribution in the human body, more attention should be focused on SARav1 than the whole body averaged SAR (WBA-SAR) when establishing the non-ionization electromagnetic radiation hygienic standard and for evaluating whether the electromagnetic pulse radiation will do harm to human health.
机译：从表1所示的SAR_（av1）的行结果可以看出，即使SAR_（avl）差异不大，内部SAR分布也可能存在显着差异。当频率增加时，它显示在皮肤和眼睛中显着增加，但是在人体模型内部的组织（例如，肌肉，肠和心脏）中却减少。比较相同频率下不同组织中的SAR_（av1）结果，可以看出皮肤的值是显着的。在200、400和600MHz的频率下，大脑的SAR_（av1）值最大。当频率大于800MHz时，眼睛和皮肤的SAR_（av1）值最大。这是由于以下事实：较高的高频能量吸收率不允许大量能量渗透到位于体内的器官。从整个角度来看，进一步表明某些组织的SARav1分布在某些特定频率下非常高，例如600MHz的肺和脾的SARav1分布。这种特定的吸收归因于在组织表面上反射的行波和驻波产生的波峰。表2给出了暴露于高功率电磁脉冲时不同频率下不同组织中SARav的分布。它显示了大脑，肠，心脏，胃，胰腺，脾脏，肾脏和胆汁的SARav分布集中在低频上。根据上面显示的结果，理想的保护频带是100-1000MHz。此外，由于SARav1在人体内的分布非常不均匀，因此在建立非电离电磁辐射卫生标准以及评估电磁脉冲辐射是否会影响人体平均SAR（WBA-SAR）时，应更多地关注SARav1。危害人类健康。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号