Noncollinear phase and group velocity matching of femtosecond OPA based on periodically poled lithium niobate were discussed, which differ from that based on birefringent phase matched traditional crystals such as BBO.

The group velocity matching and group velocity dispersion have been investigated for noncollinear optical parametric amplification with periodically poled KTiOPO_4(KTP).

The change of the phase matching angle, the pulse front slant angle and the noncollinear angle with the signal wavelength are calculated, when group velocity matching of three pulses is ach.

Based on the above concept and the present specialities of our railways, and concerned with the track mechanics, the speed matching of the high-speed and medium-speed mixed traffic and its relative problems are discussed in this paper.

Both their timing characteristics and speed matching problem are analyzed.

Based on this background, this paper studies the speed matching of passenger/freight trains on existing lines with MAX.

Experiment of Lever Arm Effect Compensation for Velocity Matching Alignment with Moving Base;

The result shows that if velocity matching is used to alignment SINS, initial binding influence the value of evaluation to gyro-drift markedly.

Velocity matching of the transfer alignment (TA) is the method used to difference the velocity matching data of the slave inertial navigation system (INS) mounted on the weapon and the master INS mounted on the airplane.

Implementation of speed match between DSP and peripheral chips using CPLD;

The speed match during different class trains is always a very important and complex problem.

Gray correlation based minimum error and correlation coefficient algorithms were improved to eliminate the disadvantages of low matching accuracy and slow matching velocity existing in the image matching algorithms nowadays.