This paper introduces measurement methods applied to ec and oc analysis nowadays , including optical method and thermo method thermooptical method to demonstrate their advantages and disadvantages , and to give an expectation for ec and oc in upcoming research 本文介绍了现阶段气溶胶有机碳和元素碳的各种检测方法，将其大体分为光学法和热学法光热法两类，分析了各种方法的优缺点并提出自己的观点，最后展望了气溶胶有机碳元素碳的研究前景。
This paper introduces measurement methods applied to ec and oc analysis nowadays , including optical method and thermo method thermo - optical method to demonstrate their advantages and disadvantages , and to give an expectation for ec and oc in upcoming research 本文介绍了现阶段气溶胶有机碳和元素碳的各种检测方法，将其大体分为光学法和热学法光热法两类，分析了各种方法的优缺点并提出自己的观点，最后展望了气溶胶有机碳元素碳的研究前景。
This paper introduces measurement methods applied to ec and oc analysis nowadays , including optical method and thermo method thermo ? ? optical method to demonstrate their advantages and disadvantages , and to give an expectation for ec and oc in upcoming research 本文介绍了现阶段气溶胶有机碳和元素碳的各种检测方法，将其大体分为光学法和热学法光热法两类，分析了各种方法的优缺点并提出自己的观点，最后展望了气溶胶有机碳元素碳的研究前景。
At present greco is regarded as one of the most valuable methods of radar cross section ( rcs ) computation in the high - frequency region . depending on these conditions , several researches have been completed in this paper : firstly , calculating rcs of complex conducting targets has been accomplished by greco method . the high - frequency rcs of targets are obtained through physical optics ( po ) and incremental length diffraction coefficients ( ildc ) respectively 本论文做了以下研究工作：首先，实现了运用greco方法计算了高频区理想导体复杂目标的雷达散射截面( rcs ) ，分别应用了物理光学法( po )和增量长度绕射系数法( ildc )计算了目标的面元和棱边的电磁散射，最后综合面元与棱边的散射效应得到目标的总rcs 。
The engineering algorithm ( physics optical method ) for numerical simulation of ao effect was also derived , the point - diffusion function obtained can be used to obtain sighting - axis deviation , blurring , jitter and strehl ratio , so that the ground simulation of ao effect can be theoretically feasible 同时推导了气动光学效应数值模拟的工程算法(物理光学法) ，得出的点扩散函数便可得到气动光学效应的视轴偏差、模糊、抖动、 strehi比等，从而使气动光学的地面模拟测试研究在理论上可行。
Second , the paper calculates some rfss ( radio frequency simulation system ) anechoic chamber to use go ( geometrical optics ) and gives the detailed calculating course and consequence . then compares it with measured consequence , observes that they tally well . so , the model of microwave anechoic chamber is right 本文采用几何光学法计算了某射频仿真微波暗室，并详细给出了计算过程，最后得到了静区反射率电平的计算结果，然后将其与实测结果进行比较，发现基本吻合。
In addition , the mom - po hybrid method is proposed to dissect radiation from radome - enclosed antennas and the correction impedance matrix upon which the solution to equivalent currents of radome ' s surface depend is built . a comparative analysis of those methods is finally presented to examine respectively their accuracy as well as computational efficiency 最后，对矩量法物理光学法的混合算法分析问题的过程进行讨论，给出混合算法分析带罩天线辐射问题的具体解决方案，建立混合算法求解天线罩表面等效电磁流的校正矩阵。
And then the radiation problems of various kinds of wire antennas ( i . e . straight wire antenna , helix wire antenna , koch fractal antenna , etc . ) mounted on the complex - shaped pec platform are solved based on the efie - mom and junction basis function . finally the scattering problems of complex - shaped electrically - large 2d pec targets are solved based on the hybrid method of ipo and mom , which can be easily expanded to the 3 - d condition 本文使用积分方程类方法，对一些简单和复杂金属载体上的线天线以及金属目标本身的电磁特性进行了研究，完成了有关数值方法的理论建模和程序实现，所涉及的方法主要包括基于电场积分方程的矩量法( efie - mom )和迭代物理光学法( ipo ) 。
Incremental length diffraction coefficients ( ildc ) is adopted to calculate the contribution of edge diffraction . in order to improve the accuracy of calculation , multi - scattering is discussed , based on the two former contributions and ray - tracing method . geometrical optics ( go ) and physical optics ( po ) are used to calculate the multi - reflection between facets and facets 对于镜面反射采用物理光学法计算其散射贡献，结合基于面元的目标模型的表示，采用离散的积分形式，将面电流积分化简为线积分，简化计算复杂度；对于边缘绕射，运用增量长度绕射系数理论计算目标边缘绕射场；在多次反射中，则以光线跟踪方法为基础，采用几何光学、物理光学相结合的方法分析考虑多次散射场。
An idea to establish a cancellation database on the basis of the smooth of rcs of the protected target is also introduced the field scattered by facets and fringes and the multiple scattering effect are calculated by a hybridization of the theory of physical optics , equivalent currents and areal projection - physical optics , which are utilized to compute the rcs of an aeroplane 还提出了根据被保护目标rcs的平滑值确定对消数据库的思想。应用物理光学法、等效电磁流法和区域投影物理光学方法计算了面元散射场、劈边缘绕射场以及多次散射场，采用此方法计算了某飞机的rcs ，并对该目标的rcs进行了平滑处理。
