A New Method for Generating Variable Frequency and Multimode Signals of Electroacupuncture Treatment for Insomnia

2019 ◽  
Author(s):  
Anfeng Hu ◽  
Suzhen Wang ◽  
Enlin Cai ◽  
Weizhi Li
Keyword(s):  
New Method ◽  
Variable Frequency ◽  
Electroacupuncture Treatment

Differential Protection for High-Voltage Variable Frequency Motor Based on Sampled Values Algorithm

2013 ◽  
Vol 373-375 ◽  
pp. 1401-1405
Author(s):  
Shao Bo Yan ◽  
Yan Xu ◽  
Zong Jiang Mu
Keyword(s):  
High Voltage ◽  
New Method ◽  
Variable Frequency ◽  
Differential Protection ◽  
New Approach ◽  
Current Differential Protection ◽  
Calculation Results ◽  
Security Standard ◽  
The Impact ◽  
Motor Protection

With the application of inverter in high-voltage motor, the traditional current differential protection cant be used because of the variable frequency. So it adopts low sensitive current instantaneous protection as main protection, which doesnt meet the security standard of grid state. In order to improve the sensitivity and reliability of high-voltage motor protection, a new method based on current sampled values is proposed in this paper, which adapts to the variable frequency system. After a brief description about the impact of inverter on main protection of motors, it introduces the principle of sampled value current differential protection and variable RS sampled value algorithm. A matlab example is used to simulate. On the whole, the simulation and analysis of the calculation results verify the feasibility and reasonableness of the method. Therefore, it provides a new approach for the protection of high-voltage motor in variable frequency system.

Selective Sampling and Orientation of Non-Homogeneous Tissues

1968 ◽  
Vol 26 ◽  
pp. 98-99
Author(s):  
C. C. Clawson ◽  
L. W. Anderson ◽  
R. A. Good
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Light Microscopy ◽  
Random Sampling ◽  
New Method ◽  
Microscope Examination ◽  
Small Areas ◽  
Selective Sampling ◽  
Large Numbers ◽  
Specific Orientation

Investigations which require electron microscope examination of a few specific areas of non-homogeneous tissues make random sampling of small blocks an inefficient and unrewarding procedure. Therefore, several investigators have devised methods which allow obtaining sample blocks for electron microscopy from region of tissue previously identified by light microscopy of present here techniques which make possible: 1) sampling tissue for electron microscopy from selected areas previously identified by light microscopy of relatively large pieces of tissue; 2) dehydration and embedding large numbers of individually identified blocks while keeping each one separate; 3) a new method of maintaining specific orientation of blocks during embedding; 4) special light microscopic staining or fluorescent procedures and electron microscopy on immediately adjacent small areas of tissue.

A new method for the determination of nitrates

1960 ◽  
Vol 23 ◽  
pp. 227-232 ◽  
Author(s):  
P WEST ◽  
G LYLES
Keyword(s):  
New Method
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