Based on analyzing the dynamic control method on JB23-W/Z crank press driven by hybrid excitation servo-motor,the varying speed driving on crank presses was discussed,the key experimented data for the further application on more powerful system was obtained.

The development trends of pumps were discussed from the aspects such as efficiency,new materials,seal, pumps of varying speed and computer applications.

A intelligent control system is developed based on UGN-3075 and CSD1EH. It provides the auto pole change speed control and the over-current protection for three-phases varying speed motor. The inner structure,the feature and working theory of Hall integrated switch component UGN-3075 and Hall integrated circuit switch CSD1EH are introduced.

(4) The parameters of energy-storage capacitive system are analyzed and calculated according to the working load and kinematical characteristic of crank press driven by varying speed, In the end, its working circuit is given.

The average error in yield estimate was 3.4% and 5.2% at constant ground speed and varying speed, respectively.

Varying speed of speaking affected the segmentation of the two syllables by the normal-hearing more than it affected the segmentation by the hearing-impaired.

In this paperwewill derive a generalized uncertainty principle (GUP) in a simple varying speed of light (VSL) model.

Generalized Uncertainty Principle in a Simple Varying Speed of Light Model

The issue of a varying speed of light in mirage cosmology is addressed and we find a scenario in which ceff always increases, tending asymptotically to c0 as the universe expands.

Here is discussed the application of differential gear mechanism for variable speed control, particularly for varying bobbin speed of flyer frames. For all three types as shown in Fig. 1, we get the same speed relationship as follows: n_z=bn_o+(1-b)n_y n_o-Constant speed of main shaft. n_y-Control speed from some speed-varying mechanism such as friction disk or belt cone. n_z-Output varying speed for some definite ends. b-Numerical constant dependent on gear ratios, given in Tab. 3 for all the three different...

Here is discussed the application of differential gear mechanism for variable speed control, particularly for varying bobbin speed of flyer frames. For all three types as shown in Fig. 1, we get the same speed relationship as follows: n_z=bn_o+(1-b)n_y n_o-Constant speed of main shaft. n_y-Control speed from some speed-varying mechanism such as friction disk or belt cone. n_z-Output varying speed for some definite ends. b-Numerical constant dependent on gear ratios, given in Tab. 3 for all the three different types. Straight lines are plotted as in Fig. 2 to show the above relationship for different values of b. In Fig. 3 is given the relationship of turning moments and turning speeds at different values of b. In Fig. 4 is given the directional relationship of the mechanical power trans. mitred in the differential gear mechanism. The conclusion is: When the required speed variation is within narrow limits, the use of differential mechanism can reduce the mechanical power transmitted by the speed-varying mechanism, thus increasing its sensitivity and accuracy of control. See equation (12).

In this paper are reported results of experimental invertigation of electromagnetic and optical radiations produced by single bubble cavitation. After observation and brief theoretical analysis of growth and collapse of single bubble, these radiations were studied experimentally. The pre-sense of electromagnetic radiation was confirmed. In contrast with the statistical conclusion drawn by other workers for optical radiation, generations of optical and electromagnetic radiations are found to be simultaneous at...

In this paper are reported results of experimental invertigation of electromagnetic and optical radiations produced by single bubble cavitation. After observation and brief theoretical analysis of growth and collapse of single bubble, these radiations were studied experimentally. The pre-sense of electromagnetic radiation was confirmed. In contrast with the statistical conclusion drawn by other workers for optical radiation, generations of optical and electromagnetic radiations are found to be simultaneous at the moment of bubble collapse. Then the effects of varying liquids and gases and of varying speeds of bubble collapse on electromagnetic and optical radiations were inverstigated. Experimental results show that, although electromagnetic radiation as well as optical radiation occur as predicted by Frenkel, the mechanism cannot be explained by his hypothisis. It is considered that generation of these radiations may be related to the generation of micro-shock wave in the bubble at the moment of its collapse.

The engineering background of this paper is the project of a elevatorfor a ship crossing over a dam of the Yangtze Gorges.The elevator hasa box for loading water and ships.While the ship is moving in the boxwith varying speed,the variations of water level in the box,water mo-ment acting on the box and the least clearance between the ship bottomand the box are concerned.The water levels on both sides of the boxgate may be different,it is also under the consideration.The above problems are turned into two...

The engineering background of this paper is the project of a elevatorfor a ship crossing over a dam of the Yangtze Gorges.The elevator hasa box for loading water and ships.While the ship is moving in the boxwith varying speed,the variations of water level in the box,water mo-ment acting on the box and the least clearance between the ship bottomand the box are concerned.The water levels on both sides of the boxgate may be different,it is also under the consideration.The above problems are turned into two partial differential equations,i.e..a continuity equation and a one-dimensional unsteady Bernoulliequation.This paper gives the solution of the simultaneous equationsunder the corresponding boundary and initial conditions by the finite dif-ference method.The results compared with the experiments are reaso-nable.