Design and realization of user defined preview form based on Delphi;

Making the best use of the function of Word VBA and database Access,we develop a library of theoretical mechanics which can directly create the Word document of the test,investigate the key subject of the method of storaging test questions into the database and creating the test document as well as the technology of using the RichTextBox control to preview the test questions.

This paper will discuss the report s representation and printing and so on in Java language, introduce the methods that implements the report s configing, paging, and preview in Java that Java dones not provide API by using canvas.

Then a conclusion is drawn: The compound deformation with bending and expanding happens in the process of hole flanging, and five cases of diameters of the workpiece's pre-holes and three cases of those types are adopted in the simulations, the diameter and type of the pre-holes optimized are respectively 40mm (average diameter) and reverse-conical.

Influence of the workpiece s pre-hole diameters and passes on thick-wall cylinders hole flanging is investigated by experiment and numerical simulation.

According to the constant-volume principle of plastic forming and the mechanical characteristics of flanging deformation,the calculation of the diameter of the pre-manufactured hole for flanging is disˉcussed.