Multi-Manual Emergency Escaping System of Air Control Bus Door Based on Driver and Passenger Manipulation

2012 ◽  
Vol 588-589 ◽  
pp. 1476-1479
Author(s):  
Zhi Wei Qi ◽  
Ting Jun Wang ◽  
Zhao Ma ◽  
Xiao Chen ◽  
Bi Jun Shen
Keyword(s):  
Control Device ◽  
Mutual Interference ◽  
The State ◽  
Manual Control ◽  
Series Connection ◽  
Bus Driver ◽  
In Series ◽  
Control Devices ◽  
Working Performance ◽  
Air Control

For controlling emergency escaping by a bus driver in the case of air control door cannot be opened normally, the paper presented a multi-manual emergency escaping system of pneumatic bus door. Bus driver and passenger can control doors expediently. The pneumatic circuit of the system and its overall arrangement is discussed. A manual control device with special valve core structure is designed. The working performance of the manual shift directional valve is analyzed. The results indicate that driver and passengers can control the bus doors under the state of abnormal condition via manual control devices in series connection rapidly. Driver and passengers control is without mutual interference. Manual shift directional valves are convenient, reliable and fast.

scholarly journals МЕТОДИКА ВИЗНАЧЕННЯ НОМІНАЛУ НАВІСНИХ ЕЛЕМЕНТІВ ШЛЕЙФІВ НЕАДРЕСНОЇ ПОЖЕЖНОЇ СИГНАЛІЗАЦІЇ

2020 ◽  
pp. 6-13
Author(s):  
Терлецький Т. В. ◽  
Кайдик О. Л. ◽  
Євсюк М. М. ◽  
Ткачук А. А. ◽  
Сомов Д. О.
Keyword(s):  
Early Stage ◽  
Control Device ◽  
False Positives ◽  
The State ◽  
Alarm System ◽  
Fire Plume ◽  
Fire Control ◽  
Fire Alarm ◽  
Fire Alarm System ◽  
Control Devices

The fire alarm system shall detect the initial signs of fire at an early stage of its occurrence and shall not give false positives. It also depends on balancing the fire alarm loop with the fire receiving control device. The use of devices from different manufacturers in the construction of a fire alarm may result in the malfunctioning of such a system and giving false signals.The article presents the results of the analysis of the state of non-address fire control receivers of different manufacturers, depending on the mode of the fire alarm loop, in which he may be. The received generalized nomogram of states of non-address control devices depending on the resistance of the fire plume is presented. A method for determining the resistance of loop elements against different fire detectors is proposed and an appropriate algorithm is developed.

Active Helmholtz Resonator With Positive Real Impedance

2006 ◽  
Vol 129 (1) ◽  
pp. 94-100 ◽  
Author(s):  
Jing Yuan
Keyword(s):  
Noise Control ◽  
Helmholtz Resonator ◽  
Control Device ◽  
Positive Real ◽  
Noise Field ◽  
Strictly Positive Real ◽  
Control Devices ◽  
Passive Noise ◽  
Active Resonator ◽  
Electronic Resonance

The impedance of a passive noise control device is strictly positive real, if the device is installed in noise fields with weak mean flows. Passive noise control devices are, therefore, more reliable than active ones. Active control may be applied to a Helmholtz resonator to introduce electronic resonance. It will affect the impedance Zact of the resonator. A controller may be designed such that (a) Zact is small and resistive at some tunable frequencies; and (b) Re{Zact}⩾0 in the entire frequency range of interest. If criterion (a) is satisfied, the active resonator can suppress duct noise at tunable frequencies. It is difficult to design a controller to satisfy criterion (b) because parameters of the controller depend on acoustic parameters of the noise field. A new method is proposed here to design an active controller to meet both criteria simultaneously. The satisfaction of criterion (b) implies a positive real Zact and a robust active resonator with respect to parameter variation in the noise field. Experimental results are presented to verify the performance of the active resonator.

Grounding Fault in Series-Connection-Based Offshore Wind Farms: Fault Clearance

2020 ◽  
Vol 35 (9) ◽  
pp. 9357-9367
Author(s):  
Gaopeng Guo ◽  
Kunpeng Zha ◽  
Jiao Zhang ◽  
Zhibing Wang ◽  
Fan Zhang ◽  
...  
Keyword(s):  
Wind Farms ◽  
Offshore Wind ◽  
Series Connection ◽  
Offshore Wind Farms ◽  
In Series ◽  
Fault Clearance

Investigation of Quantum Dot Solar Cell Device Performance

2013 ◽  
Vol 1551 ◽  
pp. 137-142
Author(s):  
Neil S. Beattie ◽  
Guillaume Zoppi ◽  
Ian Farrer ◽  
Patrick See ◽  
Robert W. Miles ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Solar Cell ◽  
Quantum Dot ◽  
Band Gap ◽  
Control Device ◽  
Open Circuit ◽  
Device Performance ◽  
Intermediate Band ◽  
Control Devices

ABSTRACTThe device performance of GaAs p-i-n solar cells containing stacked layers of self-assembled InAs quantum dots is investigated. The solar cells demonstrate enhanced external quantum efficiency below the GaAs band gap relative to a control device without quantum dots. This is attributed to the capture of sub-band gap photons by the quantum dots. Analysis of the current density versus voltage characteristic for the quantum dot solar cell reveals a decrease in the series resistance as the device area is reduce from 0.16 cm2 to 0.01 cm2. This is effect is not observed in control devices and is quantum dot related. Furthermore, low temperature measurements of the open circuit voltage for both quantum dot and control devices provide experimental verification of the conditions required to realise an intermediate band gap solar cell.

scholarly journals On a model for interference between searching insect parasites

1990 ◽  
Vol 32 (2) ◽  
pp. 133-150 ◽  
Author(s):  
P. K. Pollett
Keyword(s):  
Stochastic Model ◽  
Equilibrium Phase ◽  
Mutual Interference ◽  
The State ◽  
Normal Approximations ◽  
Insect Parasites ◽  
Non Equilibrium

AbstractThe purpose of this paper is to study a stochastic model which assesses the effect of mutual interference on the searching efficiency in populations of insect parasites. By looking carefully at the assumptions which govern the model, I shall explain why the searching efficiency is of the same order as the total number, N, in the population, a conclusion which is consistent with the predictions of population biologists; previous studies have reached the conclusion that the efficiency is of order . The major results of the paper establish normal approximations for the distribution of the numbers of active parasites. These are valid at all stages of the process, in particular the non-equilibrium phase, where explicit analytic formulae for the state-probabilities are unavailable.

Generalized modeling and character analyzing of composite fractional-order memristors in series connection

2018 ◽  
Vol 95 (1) ◽  
pp. 101-115 ◽  
Author(s):  
Zhang Guo ◽  
Gangquan Si ◽  
Xiang Xu ◽  
Kai Qu ◽  
Shuang Li
Keyword(s):  
Fractional Order ◽  
Series Connection ◽  
In Series

A Low Cost Rejuvenation of Old G.E. and Picker X-Ray Generators

1983 ◽  
Vol 27 ◽  
pp. 293-297
Author(s):  
G. Raykhtsaum ◽  
P. Georgopoulos
Keyword(s):  
Solid State ◽  
High Voltage ◽  
High Performance ◽  
Low Cost ◽  
The United States ◽  
Control Device ◽  
State Control ◽  
X Ray ◽  
Tube Current ◽  
Control Devices

General Electric (G.E.) and Picker generators are currently installed in many research laboratories all over the United States. These units are old and do not satisfy the modern requirements for X-ray generators. Instabilities of high voltage and tube current complicate the experiment. To maintain G.E. and Picker generators is becoming more and more expensive due to the high cost of vacuum tubes and replacement parts. To replace old generators with new high performance commercial units can cost even more and requires additional adaptations. In the present paper another alternative is proposed, which assumes the replacement of vacuum tube mA and KV controls with solid state circuits using the old G.E. or Picker high voltage transformers. This alternative allows rejuvenation of old generators without difficulties of reinstallation and does not require adaptations to the existing experimental X-ray equipment. The combination of old high voltage transformers with modern solid state control devices provides high performance at low cost. For this purpose the control device was designed and is described below.

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