查询词典 radiation-therapy

Firstly, we research the Vlasov antenna with reflector mainly. A new method to calculate the radiation of the antenna is founded with Vectorial Theory of Diffraction, and the corresponding program is made. The reflective characters of Vlasov antenna are studied with Moment Methods, and the results show that the total reflected energy is less than 0.25%. The radiation patterns of the antenna are analyzed, and the formulas to estimate the wave beam parameters and to design the antenna are provided. The feasibility of radiating high-order modes by Vlasov antenna is also discussed and verified. The hermetization of the Vlasov antenna is researched and the results show that with such kinds of hermetization the antenna can work under gigawatt level. The design of the mode converter from TEM to TMoi is studied, which is useful when the TEM coaxial mode is radiated by Vlasov antenna. At last, the flared-end Vlasov antenna is also discussed.

在Vlasov天线方面：用矢量绕射理论建立了天线辐射场的计算模型并编写了计算程序，该程序计算结果在主瓣上与实验测量吻合良好，近旁瓣也基本一致；利用矩量法计算了天线的反射系数，表明该天线有较小的反射，总的能量反射小于0.25％；详细分析了天线的辐射特性，给出了天线辐射波束相关参数的估算公式和天线设计公式；进一步研究和论证了Vlasov天线辐射高阶轴对称模的可行性；对天线的密封方式和功率容量进行了讨论，结果表明在不需很大密封罩的情况下可以获得GW级的功率容量；为了用Vlasov天线辐射同轴TEM模，研究了TEM-TM_(01)模式转换器的设计，得到了一些基本规律；最后，介绍和分析了带有锥形喇叭的Vlasov天线。

Hats and headbands can prevent 50% of solar radiation and reduce solar radiation enter your eyes from the surrounding glasses .

宽边帽子和头巾阻挡50%的太阳辐射，减少从镜片四周进入你眼睛的太阳辐射。

Hat and headscarf can stop half of the sunlight radiation and radiation from sides of glasses to your eyes.

宽边帽子和头巾阻挡50%的太阳辐射，减少从镜片四周进入你眼睛的太阳辐射。

Radiation resistance of hypoxic tumor cells is one of the key points in radiation oncology and biology.

肿瘤乏氧细胞的放射抗拒性问题一直是放射肿瘤学和放射生物学研究的重点之一。

Regression analysis indicates, the major factors ingrowing season are: radiation, soil moisture, relative humidity, air temperature and surface temperature; the factors in non-growing season are: radiation, surface temperature and wind speed.

回归分析表明影响生长季主要因素有：净辐射、土壤含水量、相对湿度、气温和地表温度；影响非生长季主要有：净辐射、地表温度和风速。

Ionising radiation includes radiation from space that passes into the atmosphere, from medical testing, and industrial and weapons testing.

电离辐射，包括来自太空的辐射传递到大气中，从医学测试，以及工业和武器试验。

Non-ionising radiation is safe, but ionising radiation is potentially harmful.

非电离辐射是安全的，但电离辐射是潜在有害的。

Non-ionising radiation is found in the environment in sunlight, power-lines, electrical equipment and mobile phone systems which do not have enough energy to produce harmful ionising radiation.

非电离辐射被发现在该环境中的阳光，电源线，电气设备和移动电话系统，没有足够的能源产生有害的电离辐射。

This type of radiation is known as ionising radiation because it is absorbed by the material being irradiated and generates ions which may undergo further chemical reactions with food components.

这类辐照被认为是离子型的辐照，因为辐照会被所辐照的物质吸收并产生离子，这些离子可与食物中的各组份发生进一步的化学反应。

This type of radiation is known as ionising radiation because it is absorbed by the material being irradiate d and generates ions which may undergo further chemical reactions with food components.

这类辐照被认为是离子型的辐照，因为辐照会被所辐照的物质吸收并产生离子，这些离子可与食物中的各组份发生进一步的化学反应。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。