To overcome this shortcoming, a new method is proposed to describe the abnormal input voltages, and a concept of anti-disturbance vector is introduced and added to the rectifier modulation vector to improve the output waveforms.

Based on VMM (vector modulation method) principle, this paper presents a scheme for North Seeker with its particular physical implementation methods and calculation principal explained.

An Investigation on the Eccentric Adjusting Method for the Zoom System Optics;

A speedy adjusting method of autocollimation telescope of spectrometer;

Quick adjusting method of interference fringes and correct quotation method of standard optical flat flatness are analyzed.

The paper proposed specific methods for adjustment factors,methods and choice of materials price difference for highway engineering project.

Effect of incorrect wheel alignment on tyre wear is analyzed and conventional adjustment method of the wheel alignment is also introduced in this paper.

This paper introduced in detail the working principle of the vibrator’s drive hydraulic system and its electrical control part and the major adjustment methods and steps of the systems, which gave a reference to the technicians of vibrator.