For the purpose of improving the efficiency of GIS data-updating over urban areas, a new approach of aerial
triangulation (AT) with ground control points auto extracted from the existing AT results is introduced in the paper. The
existing AT results mean the existing aerial imagery with interior and exterior orientation parameters. Through a multi-views
image matching between the new aerial photos and old photos, enormous ground control points could be auto
extracted and their ground coordinates could be calculated by the forward-intersecting of old aerial photos. The
efficiency and accuracy of the method have been tested and analysed with several actual aerial imagery blocks. The
experiment results presented in this paper shows that the method could not only extract enormous GCPs automatically
which lead to a greatly improvement of the efficiency of AT over urban areas, but also achieve the same level of
accuracy of the old AT results.
Hydrogenated amorphous silicon thin film solar cells are prepared using radio frequency plasma enhanced chemical
vapor deposition on polyimide substrates. The structure of the cell is polyimide /Al/n-μc-Si:H/i-a-Si:H/p-a-SiC:H/TCO.
Due to amorphous silicon cells have Staebler-Wronski effect and their efficiencies do not stabilize at prepared, so these
cells were placed more than fifteen months and I-V characteristics of these cells were measured in four times. They
include (i)in the initial, (ii) placed in desiccator over fifteen months, (iii) light-soaked for five hours under AM 1.5
(100mW/cm<sup>2</sup>) and (iv) annealed for two hours in natural conditions. The measurement results such as open-circuit
voltage, short-circuit current, resistance in series, parallel resistance, conversion efficiency and fill factor are given and
studied. Staebler-Wronski Effect are found and explained with these parameters. Generally, after light-soaking, the
short-circuit currents of cells increase, the fill factors and open-circuit voltage decrease and the reduction of the
efficiency is proportional to the fill factor. Abnormal Staebler-Wronski Effect appears in a cell. The cause of these
phenomena is analyzed. The consequence that the efficiency varieties with the fill factor is derived r. A graded gap in P-I
interface can be improved the cell efficiently. Ultimately, the stability of a-SiH thin film solar cells on polyimide
substrate is discussed.
The most methods of close-range photogrammetry are based on Direct Linear Transformation (DLT). But DLT often has
unstable solution and every image needs more than six ground control points to compute DLT parameters, so this
method is hard to acquire the high accuracy and its efficiency is low. The paper discusses a new method of digital close-range
photogrammetry - panning and multi-baseline digital close-range photogrammetry. This method enlarges the
intersection angle and improves the intersection precision by multi-baseline. At the same time this method applies the
classic aerotriangulation and bundle adjustment to the close-range photogrammetry, we need more than three ground
control points to compute the exterior orientation elements of all images. The experiments prove that this method can
acquire the high accuracy.
Because the aerial digital image updating is more frequent and the data is more mass, the traditional method of image
processing based on serial computing is difficult to meet the needs of high production efficiency and rapid respond. For
improving the efficiency of data processing, the computing must be parallel. The paper discusses the method of parallel
processing of mass aerial digital images based on cluster computer system. It also discusses the method of the quick
generation of mosaic image without ground control point, and introduces the application of mosaic image in rapid
response and aerial survey. The experiment results demonstrate that the parallel computing obviously improves the
efficiency of mass data processing.