Influence of layers mutual effect and radius on electronic energy of spherical nanometric system;

With the bilayer columnar nanometer system as an example,the influence of material and radius on electric current is explored under the conditions of Al outer layer(or inner layer)and another metal inner layer(or outer layer).

The relationships of the loop length, stitch density and thickness of fabrics to yarn linear density were analyzed with the experiment data, and the fiber volume fraction of glass fiber plain knitted fabrics was estimated theoretically.

The measuring principle of the virtual instrument for measurement of deep hole axis straightness developed by using the Laboratory Virtual Instrument Engineering Workbench (LabVIEW) is introduced.

The mathematical models of least square and minimum condition evaluation in accord with the definitions of axis straightness and coaxality errors have been established and briefly introduced the methods of obtaining the sampled data.

This paper presents a practical method of directly measuring diame-ter,taper and generatrix straightness of conical workpiece in precision lathe by sep-arating movement errors of mechanical system.

The theory of current straightness measurement of 2 points equidistance is studied deeply in this paper, based on which, a new method of on line measuring of generatrix straightness for the cylindrical workpiece is presented.