Under the same experimental conditions,V-shaped folded cavity is used to compare the intra-cavity frequency-doubled characteristics of Nd:GdYVO4 and Nd:YVO4.With the pumped power of 6.71W,an output power 1.69W and 1.46W of stable frequency-doubled green light was achieved by V-shaped folded cavity,giving an optical conversion efficiency of 25.2% and 21.8%.

A high repetition electro-optic Q-switch Nd:YAG laser was reported. The laser resonant cavity is plano-concave cavity,the radius of the concave mirror is 10 m,and the reflection of outgoing mirror is 4%. We used two xenon lamps (7 mm×130 mm) as the pumping source of Nd:YAG laser bar (8 mm×140 mm) and the KDP as the electro-optical crystal.

In comparison with solid-state or gas lasers the advantages of diode lasers are their small dimensions, low cost, high output-to-input conversion efficiency, whereas among drawbacks of diode lasers belong an ellipticity, astigmatism, and a strong divergency of an outgoing beam.

To establish a relationship between activity and structural descriptors of BABQ compounds, it is essential to develop a regression or an input-output model.

Stability analysis of the dynamic input-output system

The dynamic input-output model is well known in economic theory and practice.

In this paper, the asymptotic stability and balanced growth solutions of the dynamic input-output system are considered.

This paper constructs the probability model of Gunther generator at first, and the finite dimension union distribution of the output sequence is presented.

This paper constructs the probability model of Gunther generator at first, and the finite dimension union distribution of the output sequence is presented.

The result shows that the output sequence is an independent and uniformly distributed 0,1 random variable sequence.

It gives the theoretical foundation about why Gunther generator can avoid the statistic weakness of the output sequence of stop-and-go generator, and analyzes the coincidence between output sequence and input sequences of Gunther generator.

Minimum squared error (MSE) algorithm is one of the classical pattern recognition and regression analysis methods, whose objective is to minimize the squared error summation between the output of linear function and the desired output.

Their objective functions include the squared error summation between the output of nonlinear function based on kernels and the desired output and a proper regularization term.

An output control for tracking the command signal from linear parametrically uncertain systems under external disturbances is studied.

Results of the development and study of a 14-stage air high-voltage pulse generator with an output voltage of up to 250 kV, a current rise time of 10 ns, and blow capacitance of 400 pF are presented.

A compact nanosecond electron accelerator with an output energy of up to 4000 keV, a pulsed power of 100-180 MW, a beam current of 0.25-1.1 kA, and a pulse energy of 5-7 J is described.

The device contains a pulse oscillator generating pulses with an amplitude of up to 12 kV, a pulse former reducing the pulse front duration down to 0.1-0.3 ns, and an output device made in the form of a radiator, applicator, or field-forming system.

A high-current nanosecond-pulse generator with a pulse power of up to 1.6 GW, an output voltage of 0.5-1 MV, pulse duration of 40-60 ns, and repetition rates of 300 Hz (in a steady-state mode) and up to 850 Hz (in a burst mode) is described.

The relation between waves with outgoing and incoming characteristics is explained.

Experiments are performed in the heating of ceramic samples of Al2O3 and samples remelted from Al2O3 powder; in these samples, the intensities of outgoing radiation and the reflectivity are measured for different wavelengths.

The cylinder mates two different-diameter waveguides and ensures power transmission of the incoming mode to the outgoing mode.

The selection of the arc that has not been traversed yet among those originating from the current vertex is determined by the order of the outgoing arcs, which is a priori specified for each vertex.

Therefore, the upper estimate of the algorithms is different from the optimal estimate O(nm) by the number of steps required for the backtracking along the outgoing tree.

Rectified current derivable from an electric bulb when it is painted with Chinese ipk has been observed. The rectifying characters of twenty three ordinary electric bulbs made by eleven different companies were studied. It was observed that the polarity of the rectified current derived from the surface of the bulb depends on the nature of the bulb and an explanation to account for the phenomenon has been attempted. Results showing the relation between the output and the input, the effect of the position of the...

Rectified current derivable from an electric bulb when it is painted with Chinese ipk has been observed. The rectifying characters of twenty three ordinary electric bulbs made by eleven different companies were studied. It was observed that the polarity of the rectified current derived from the surface of the bulb depends on the nature of the bulb and an explanation to account for the phenomenon has been attempted. Results showing the relation between the output and the input, the effect of the position of the paint on the bulb, the temperature, the composition of the paint and the nature of the bulb are given.

In this paper the relationships between small-signal h-parameters and elements of the natural equivalent circuit of the common emitter configuration of junction transistors are studied. From experimental results of h-parameters of two typieal alloyed PNP transistors (one 2N104 and one п-6 transistor) the relationship of h-parameters and elements of natural equivalent circuit vs operating frequency and d. c. operating condition (d.c. emitter current and d.e. collector voltage) are evaluated. Results thus obtained...

In this paper the relationships between small-signal h-parameters and elements of the natural equivalent circuit of the common emitter configuration of junction transistors are studied. From experimental results of h-parameters of two typieal alloyed PNP transistors (one 2N104 and one п-6 transistor) the relationship of h-parameters and elements of natural equivalent circuit vs operating frequency and d. c. operating condition (d.c. emitter current and d.e. collector voltage) are evaluated. Results thus obtained ace then compared with results obtained from analysis based on calculations using physical constants of the transistor. The explanation of the behavior of the reverse open-circuit voltage amplification factor, μb0, of the common emitter circuit is given in detail. Characteristics of μbo and properties of h22 (the output admittance with input open) are correlated. This paper gives complete information about h-parameters and natural equivalent circuit of two transistors, serving as an important reference for both device men and research workers on transistor circuits.

In this article the properties of resonance cavity, operating condition, and radiation output of optical pumping laser are discussed. Factors affecting the operation and the resultant emission are analysed in detail. Evaluation standard for resonance cavity and active media are described. Cavity constructions for limiting the resonance to one or several modes are suggested, hence, photon degeneracy or brightness of light flux in unit frequency range may be increased by several orders of magnitude. Experimental...

In this article the properties of resonance cavity, operating condition, and radiation output of optical pumping laser are discussed. Factors affecting the operation and the resultant emission are analysed in detail. Evaluation standard for resonance cavity and active media are described. Cavity constructions for limiting the resonance to one or several modes are suggested, hence, photon degeneracy or brightness of light flux in unit frequency range may be increased by several orders of magnitude. Experimental results on the Ruby laser obtained in our laboratory are given. The interpretations of angular distrubution of light frequency, proposed by the auther, can be used to account for some experimental results published by recent investigertors.