A computer-controlled load loss standard for calibrating high-voltage power measurement systems

1995 ◽  
Vol 44 (2) ◽  
pp. 425-428 ◽  
Author(s):  
E. So ◽  
P.N. Miljanic ◽  
D.J. Angelo
Keyword(s):  
High Voltage ◽  
Power Measurement ◽  
Measurement Systems ◽  
Computer Controlled

scholarly journals RESEARCH OF INCREASING THE REACTIVITY COTTON CELLULOSE INTENDED FOR CHEMISTRY

2020 ◽  
Vol 2020 (1) ◽  
pp. 69-75
Author(s):  
R Sayfutdinov ◽  
◽  
U Mukhitdinov ◽  
N Eshpulatov
Keyword(s):  
Labor Productivity ◽  
Electric Charge ◽  
High Voltage ◽  
Reaction Rate ◽  
Cotton Cellulose ◽  
Chemical Processing ◽  
Foreign Countries ◽  
Composition And Structure ◽  
Computer Controlled

The reactivity of cotton pulp during chemical processing is significantly lower compared to celluloses obtained from other cellulose-containing plants. Increasing the reactivity of cotton cellulose improves the quality of the products based on it, and also increases labor productivity. The aim of this work is to study the possibility of replacing wood pulp imported from foreign countries with domestic cotton cellulose by increasing the reactivity of cotton cellulose for chemical processing, improving the quality of the resulting product and increasing the reaction rate. In this work, we used methods for determining the composition and structure of cotton cellulose samples. The reactivity of the obtained samples to acetylation after treatment with electric charges was studied. An increase in reactivity was evaluated by a decrease in crystalline areas based on diffract grams that were recorded on a computer-controlled XRD-6100 apparatus (Shimadzu, Japan). A method is proposed for increasing the reactivity of cotton cellulose by treating it with high voltage electric charges. To reduce the crystalline areas of cotton cellulose, it was activated by an electric charge, which led to an increase in the reactivity of cotton cellulose. The optimal voltage limits are found, the number of pulses and the required capacitance of the capacitor, at which the maximum values of the reactive activity of cotton cellulose are achieved.

scholarly journals In‐duct fan sound power measurement systems

1974 ◽  
Vol 55 (S1) ◽  
pp. S60-S60
Author(s):  
Malcolm J. Crocker ◽  
John S. P. Wang
Keyword(s):  
Power Measurement ◽  
Sound Power ◽  
Measurement Systems

A fast gas-mixing system for breath-to-breath respiratory control studies

1982 ◽  
Vol 52 (5) ◽  
pp. 1358-1362 ◽  
Author(s):  
P. A. Robbins ◽  
G. D. Swanson ◽  
A. J. Micco ◽  
W. P. Schubert
Keyword(s):  
High Voltage ◽  
Special Form ◽  
Low Voltage ◽  
Respiratory Control ◽  
Gas Mixing ◽  
Tidal Forcing ◽  
Mixing Chamber ◽  
Computer Controlled ◽  
End Tidal ◽  
Gas Fractions

A computer-controlled gas-mixing system that manipulates inspired CO2 and O2 on a breath-to-breath basis has been developed. The system uses pairs of solenoid valves, one pair for each gas. These valves can either be fully shut when a low voltage is applied, or fully open when a high voltage is applied. The valves cycle open and shut every 1/12 s. A circuit converts signals from the computer, which dictates the flows of the gases, into a special form for driving the valve pairs. These signals determine the percentage of time within the 1/12-s cycle each valve spends in a open state and the percentage of time it spends shut, which, in effect, set the average flows of the various gases to the mixing chamber. The delay for response of the system to commanded CO2 or O2 changes is less than 200 ms. The system has application for the manipulation of inspired gas fractions so as to achieve desired end-tidal forcing functions.

Sign in / Sign up

Export Citation Format

Share Document