Practical application of building integrated photovoltaic (BIPV) system using transparent amorphous silicon thin-film PV module

An analysis has been carried out on the first practical application in Korea of the design and installation of building integrated photovoltaic (BIPV) modules on the windows covering the front side of a building by using transparent thin-film amorphous silicon solar cells. This analysis was performed through long-term monitoring of performance for 2 years. Electrical energy generation per unit power output was estimated through the 2 year monitoring of an actual BIPV system, which were 48.4 kWh/kWp/month and 580.5 kWh/kWp/year, respectively, while the measured energy generation data in this study were almost half of that reported from the existing data which were derived by general amorphous thin-film solar cell application. The reason is that the azimuth of the tested BIPV system in this study was inclined to 50° in the southwest and moreover, the self-shade caused by the projected building mass resulted in the further reduction of energy generation efficiency. From simulating influencing factors such as azimuth and shading, the measured energy generation efficiency in the tested condition can be improved up to 47% by changing the building location in terms of azimuth and shading, thus allowing better solar radiation for the PV module. Thus, from the real application of the BIPV system, the installation of a PV module associated with azimuth and shading can be said to be the essentially influencing factors on PV performance, and both factors can be useful design parameters in order to optimize a PV system for an architectural BIPV application.     

一种基于最小二乘直线拟合的高分辨率DBS成像算法

该文分析了应用于扫描模式下的传统多普勒波束锐化成像算法(DBS)及其改进算法的特点和不足,提出一种新的高分辨率多普勒锐化算法。该算法给出了相干累积点数的选取原则,考虑了距离徙动校正,并利用最小二乘直线拟合方法将模仿SAR的方位聚焦处理技术推广到一般大范围扫描情况,较大幅度地提高了DBS算法的成像质量。机载雷达实测数据的处理结果证明了方法的有效性。     

内方位元素测试仪光学系统设计

内方位元素测试仪是测量航测相机的主点、主距及畸变的仪器。本文介绍了内方位元素测试仪光学系统设计,包括光学参数、结构形式的确定,成象质量和最终设计结果．     

长边GPS控制测量的应用与分析

长边ＧＰＳ观测边长与坐标边长的不一致性与使用基准及转换模型有关。其主要原因是１９５４坐标自身的缺陷,即高程异常偏高和平差变表及误差积累。因此。因此,进行ＧＰＳ的ＷＧＳ－８４坐标向１９５４坐标转换计算时,应尽可能选择参考点作对比分析。若满足精度要求,可采用全国精密参数作转换计算若不能满足精度要求或不知道实际测点（相对地面点）的点位误差,可先将边长作高程异常改正,再相对起算点作方位改正。一般地,地面控     

双站逆合成孔径雷达成像理论研究

常规单站逆合成孔径雷达(ISAR)不能对沿雷达视线方向飞行的目标成像,收发分置的双站逆合成孔径雷达(双站ISAR)系统解决了以上问题。该文分析了双站ISAR目标回波的特点,研究了双站ISAR对目标成像时的成像原理、方位分辨力、目标尺寸限制和采样率要求,得到了严格数学解,最后给出了模拟飞机目标的成像结果。     

单周波和双周波信号用于冲激SAR成像的性能分析

该文分析了冲激SAR成像的特点,在发射和接收均为超宽带信号、大方位积累角的情况下,推导出了冲激信号SAR方位分辩率的解析表达式,并在此基础上对单周波和双周波信号用于冲激SAR成像的方位分辨率、距离分辨率进行了对比和分析,得到一些有用的结论。最后,通过仿真实验验证了这些结论的正确性。     

一种新型液压升降机构的理论研究与工程设计

为了满足野战机动雷达的现代化作战需求,提出采用一种新型液压升降机构.本文对该机械进行了理论研究与工程设计.该机构具有承载能力大、离地距离大、方位精度高和可靠性高的特点.该机构已在产品应用中获得验证,可以满足高精度侦察校准雷达的工作需求.     

平台惯导系统初始自对准技术研究

研究了平台惯导系统初始自对准技术，实际上是采用任意双位置平台方位锁定。首先介绍自对准原理，然后进行详细理论分析，最后以某型号平台惯导系统为应用，介绍初始对准调试情况。对应于系统随机漂移为０．０５度／ｈ，平台方位自对准精度达到１７．４２秒，且重复性较好，自对准调试结果得到光学传递对准的检验。随后进行车载导航实验，导航精度达到４．５５ｎｍ／ｈ。     

A fast approximate imaging algorithm for spaceborne synthetic aperture radar

A fast algorithm of azimuth processing for spaceborne aperture radar (SAR), which is called SPECAN algorithm, is proposed. Compared with general frequency algorithms, SPECAN has advantages in computation, memory and structure. SPECAN algorithm is very important for surveying real time processing of spaceborne SAR. The structure and special problems for SPECAN algorithm used in spaceborne SAR are mainly engaged in this paper. Finally, raw data of SEASAT-A satellite is used to verify the feasibility of SPECAN algorithm.     

双站SAR的方位向分辨力、脉冲重复频率和测绘带宽

该文对双站合成孔径雷达(双站SAR)的方位向分辨力,脉冲重复频率以及测绘带宽进行了详细的研究,得到了严格的数学解,并给出了计算机仿真结果。