Poly-SiGe films were prepared by a metal-induced growth technique with ultrahigh vacuum chemical vapor deposition(UHVCVD) at low temperature. The crystal quality and morphology of poly-SiGe films were characterized by XRD and SEM. The influences of varying the thickness of Ni prelayer and the growth parameters on poly-SiGe films were investigated. It is shown that thicker Ni(≥10nm) has an obvious effect on poly-SiGe growth at 420—500℃. And for the samples with 60nm thick Ni layers, poly-SiGe deposition yields a continuous, highly crystalline film with good morphology.

The colorimetric properties of the conventional arc lamp and LED are calculated and analyzed by using the colorimetry theory. Comparing to the conventional arc lamp used as projection light source, LED illuminator has higher efficiency of the spectral power and better ability of color display. It can reach sRGB standard widely used by digital projectors. The single-color LED driven by temporal pulses will produce high-brightness projection display with saturate colors. Therefore, LED can take place of conventional arc lamp to satisfy the colorimetric requirement of the projection display.

Programmers manual compiling SQL statements according to relevant software development of database existing some troubles like workload big, easy to make a mistake, difficult to maintenance, this piece research designing on data manipulation class based on ADO.NET, realize the database operation through the data manipulation class. Based on expounding ADO.NET architecture and ADO.NET object model, concentrate on the researching two things: one is automatic generation of SQL statements, designing operation function, function Arguments or global arrays, deciding which type of SQL statements to generate, the other one is designing on data manipulation class, through re-loading, packaging and inheriting to design in data manipulation class for database. Results show that the research and application of data manipulation class solved a number of problems of traditional software development; it has important meaning for improve quality and efficiency of software development, it has become an important research direction of Database software development area.