The results show that of the resolution of the directional distribution is higher the mbdm than the mmlm and while of the resolution of the reflection coefficient higher the mmlm than the mbdm . the two methods are sensitive to the array disposal of wave gauges and the resolution power of t he analyzing results by the polygon array is better , while the linear array worse . the wave gauge number of array and the distance between the array and the reflector can influence strongly the resolution power of the analyzing results 结果表明，对于波浪方向分布的分析， mbdm的分辨力高于mmlm ，对于反射系数方向分布的估算， mmlm优于mbdm ；仪器阵列的布置、仪器个数以及阵列与反射面的最近距离对两种方法分析结果的分辨力影响较大； mmlm的收敛速度快于mbdm ，计算的稳定性优于mbdm ； mbdm的分辨力受超参数选择的影响。
This design has distinctive technical features as follows : 1 . applied multi - sensor construction . well - calculated distance and crossing angles between sensors aiming at a same target makes it possible to acquire more accurate back waves than single sensor construction 采用多探头结构，多个探头之间相互之间有一定距离和交织发射角度，对准同一个被测物体的反射面，可使检测范围内的每一个固定点上反射面的可测方位个数较单探头有所增加，可大大降低回波漏检率； 2
( 3 ) . put forward two structure scheme of opto - electronic deflection measurement sensor , light transmitting with non - mechanical scanning and light reflecting with non - mechanical scanning after compared exisiting methods of liquid level measurement to satify this needafter the comparison , an opto - electronic deflection measurement sensor based on light reflecting with non - mechanical scanning be confirmed . then the concrete design is to carry out , which includes the design of reflective surface , the design of pds ( photo detective subassembly ) ' s bracket , the design of floater and the design of shaking - absorbed accessory . during the process , there are a series of caculations and emulations . at last , the opto - electronic deflection measurement sensor has been designed and produced 比较了现有液位测量方法后提出了能够满足大佛寺长江大桥挠度测量要求的基于连通管的光电挠度计的非机械扫描光透射式和非机械扫描光反射式的两种方案，通过比较确定了非机械扫描光反射式方案。随后通过对该方案进行具体的零件设计，主要包括反射面的设计， pds (光电接收组件)支架的设计，浮子的设计以及减震零件的设计等等，在设计的过程中包含了一些理论计算和仿真，最终设计和制作了光电挠度计。
The radiation performance of the antennas is described in detail by clear physical pictures . based on the simulation results , the vlasov antennas work in c band are designed , include the vlasov antenna with single - reflector . at last , a second reflector is added to the single - reflector devise to narrow the beam further , and the antenna gain increased to 20 . 6db 为了提高天线性能,在vlasov辐射器的基础上,在辐射器的上方加了一个反射面,形成了第一种vlasov天线,结果天线的增益有了很大的提高,而且波束也变窄了很多,从而天线的性能有了明显改善。
In this paper , the vacuum thermo - cycling effects and vacuum ultraviolet effects on space inflatable structural materials were analyzed based on a thorough survey over the studies done through flight tests , ground simulation experiments and theoretical research . the main contents of this thesis are as follows : the performance damage effects of thermo - cycling on space inflatable structural fabric carbon fiber reinforced epoxy laminates ( cf / ep ) , aluminized kapton ( al / kapton ) films which used as reflector of space inflatable antenna were investigated by a temperature range of - 120 120 with the vacuum degree 10 - 5 pa which conducted with space environment ground - based simulation facility 本文在对国内外飞行试验、地面模拟试验以及理论研究等所取得的成果调研的基础上,针对空间充气结构材料进行地面模拟真空热循环与真空紫外辐照的研究工作:利用真空热循环地面模拟试验机研究了真空环境( 10 - 5pa )中- 120 120的热循环条件下空间充气支撑结构织物碳纤维增强环氧树脂( cf / ep )层合材料、空间充气展开天线反射面镀铝聚酰亚胺( al / kapton )薄膜的空间环境效应。
