The characteristic parameter about hollow waveguide is gained by using numerical method and the energy distribution model is made by using vector . thirdly we discuss the z - direction energy distribution in hollow waveguide and reflecting character on interface 我们还在对空芯光纤中径向能量分布和介质表面反射特性研究的基础上,给出了介质膜与常规界面的反射特性的差异。
According to different optics - reverberation character of water and gas , this paper put forward how to identify gas from the gas - water digital image and how to f - urther calculate void fraction . the result shows that the method possesses relatively satisfactory precision 基于水和气体对光的反射特性的不同,提出了一种自动识别水气二相流中的气泡的数字图像处理方法,并进一步给出计算二维、瞬时掺气浓度场的算法。
1 ) in the solutions with high hno3 concentration , the etching is similar to chemical polishing which produces flat surface . 9 . 3 % surface reflectance is obtained through stopping etching when the blue color is appearing on the surface , which is lower than 15 . 7 % reflectance of sio2 layer arc 这对于提高太阳电池的效率是极有益的。 ( 2 )反射特性、形貌和腐蚀液的关系1 )在高hno _ 3的溶液中,近似化学抛光,制备的样品表面相对光滑。
Abstract : the structure and operating principle of triangulation probe are firstly briefly introduced in the paper . the analysis and derivation for the reflection property of metal surface are carried out . several existed problems and solving schemes for measuring metal surface with triangulation are proposed 文摘:首先简单介绍了三角法测头的结构和工作原理,对金属表面的反射特性进行了分析和推导,提出了三角法测量金属表面时存在的几个问题以及解决方案。
Super - resolution spatial spectrum estimation is applied in this dissertation to realize bearing resolution by utilizing the different bearings between targets and first - order sea echoes . the simulation of radar echoes in one resolution cell is presented based on the theoretically analyzing hf sea clutter sea clutter reflection characteristic and sea echo spectrum stretching mechanics 本文从分析高频海杂波反射特性以及平台运动引起海浪展宽机理入手,建立便于理论研究的一阶展宽的海杂波和二阶海杂波模型;在分辨单元上对雷达回波信号进行了仿真。
Using kalman model and gaussian random phase - screen fft , we simulated the distribution of illumination beam through long distance atmosphere and its frequency character . also other facts in simulation were analysised , such as reflection of niaterial under natural lighting , point spread function of optic system and electronic noise 文中用kalman谱模型和菲涅尔衍射的fft技术实现了照明光大气传输的数值模拟,分析了照明光分布规律,并提出了材料反射特性、光学系统、采集系统和图像噪声的模拟方法。
The 16 - bit adcs inside the single - chip microcomputer are used in the instrument to measure the output signal of the high frequency tuner , two12 - bit dacs are used to give the control signal needed by programmable gain amplifier . the system has the characteristics such as light volume , light weight , and low cost , which make it more applicable 该标量网络分析仪能方便地测试一个系统的传输特性和反射特性,与pc机通过通用串行总线( usb )连接,实现被测网络频率特性的图形显示、保存、打印及参数设置功能。
The dissertation firstly discusses the reflectance of euv and soft x - ray in " multilayer system based on classical electrodynamics and optical characteristics of materials . the nns surface roughness in different spatial frequency range is carefully studied since scattering can seriously reduce the reflectance in euv and soft x - ray wavelength region . we discuss representative model of residual stress in 首先从材料在极紫外、软x射线波段的光学特性出发,讨论了极紫外、软x射线在理想和非理想多层膜系中的反射特性;研究了影响极紫外、软x射线多层膜反射率的表面粗糙度的空间频率范围;重点探讨了多层膜残余应力的典型模型、应力形成机制以及薄膜的形成过程。
As the isotropic etching being related to the resistivity of the si material and combining the practical need of the solar cell production , the paper emphasis on the etching of the multicrystal si with resistivity of about 1 . cm . the results : ( 1 ) reflectance characteristics the appropriate etching solutions has led to a reduction of the total integrated reflectance to 5 . 7 % , which is quite comparable with conventionally pretextured si surface covered by a double layer arc 由于以hf + hno _ 3 + h _ 2o为溶液各向同性腐蚀与硅片的掺杂浓度有关,结合生产太阳电池的实际需要,本文重点研究了电阻率1 . cm左右的多晶硅的腐蚀情况,结果如下: ( 1 )反射特性在适当的hf + hno _ 3 + h _ 2o溶液中制备的多晶硅电池的绒面,其反射率降到了5 . 7 。
The data processing part includes fft , filter and averaging , calibration algorithm , smith chart designing , s - parameter algorithm , transmission and reflection caculating , etc . the hardware interface consists of control information protocol , data transfer protocol , status information protocol and the synchronization protocol of the transfer of all the above information 数据处理部分包括快速傅里叶变换、滤波与平均、用s参数表示的传输反射特性算法、表示阻抗特性的史密斯圆图算法、校准补偿算法、以及实时测量的实现算法等。接口部分包括控制信息协议、数据传输协议、状态信息协议以及上述各种信息传输的同步协议。