The Evaluation of Engine Steady-State Operational Control Using Quality Index

2004 ◽  
Author(s):  
Scott D. Parke ◽  
Frank M. Farber
Keyword(s):  
Steady State ◽  
Quality Index ◽  
Operational Control

Monitoring and Detection of Vehicle Emissions on Steady State Mode using Internet of Things

2021 ◽  
Vol 13 (3) ◽  
Author(s):  
R. Selvakumar ◽  
N. Sasikumar ◽  
P. Prudhiv ◽  
S. Jagadeesh Babu ◽  
V. Rakesh ◽  
...  
Keyword(s):  
Air Pollution ◽  
Steady State ◽  
Air Quality ◽  
Internet Of Things ◽  
Air Pollutants ◽  
Quality Index ◽  
Vehicle Emissions ◽  
Wireless Sensor ◽  
Steady State Mode ◽  
Sensor Reading

This project is to develop a compact system to identify and display pollutants in a vehicle. The level of emissions can be monitored and inspected by this system. Database of each vehicle emissions test can be recorded and the report can be obtained to create an awareness to the drivers and owners about the pollution caused by the vehicle. An IoT (Internet of Things) based air pollution observing framework incorporated a MQ series sensor interfaced to a node MCU set with an ESP8266 WLAN connector to send the sensor reading to an Ubidots cloud. This outline is used for noticing pollutions in demeanour of specific territory and to get the air peculiarity or property examination. The obligated framework will focus on checking the air pollutants concentration with the help of a mixture of internet of things with wireless sensor systems. The investigation of emissions should be possible by figuring out the air quality index (AQI).

Transient Flow Assurance for Determination of Operational Control of Heavy Oil Pipelines

2010 ◽  
Author(s):  
Victor Cabrejo ◽  
Mo Mohitpour
Keyword(s):  
Steady State ◽  
Dynamic Analysis ◽  
Heavy Oil ◽  
Transient Flow ◽  
Check Valve ◽  
Bubble Collapse ◽  
Operational Control ◽  
Rapid Reduction ◽  
Oil Pipeline ◽  
Pump Station

Most liquid pipelines design and operational control is based on steady state flow analysis. This neglects dynamic effects that occur as a result of occurrence of surges in a pipeline caused by rapid changes in pressure as a consequence of changes in the flow rate. A transient analysis of liquid pipelines on the other hand assures pipeline performance under all conditions (steady state and dynamic situations) including evaluating the following: • Impact from pump station start up, delivery restriction or shutdown (zero delivery); • Pump unit trip/failure; • Rapid mainline valve closures including Slam shut of a non-return (check) valve; • Effect of running the pipeline with minimum flow and maximum pump discharge pressure operating condition; • Variation in demand including rapid reduction/curtailment of delivery volumes; • Bubble collapse (the transition from slack-line to tight-line flow); • Unintentional changes in operational position of control valves; • Fluid property delivery conditions; • Liquid injection assessment; • Surge protection including pressure relief/control system evaluation; • Restart requirement to avoid slack-line conditions prevalent in hilly/mountainous parts right of way (ROW). Such a dynamic analysis would indicate whether liquid surges are of concern from design, as well as system operational conditions. It also would provide an evaluation of an automated control or potential automated strategies for overpressure protection. In this paper the dynamic analysis of liquid pipelines resulting in design and operational benefits will be described. Finally their benefits in application to a heavy oil pipeline facilities “Keystone” will be highlighted.

Research on Using Track Quality Index (TQI) to Reasonably Arrange Line Maintenance and Repair Cycle

2015 ◽  
Vol 744-746 ◽  
pp. 1303-1307
Author(s):  
Tao Zhang ◽  
Wen Xu ◽  
Wei Long Sun
Keyword(s):  
Steady State ◽  
Quality Index ◽  
Statistical Data ◽  
Maintenance And Repair ◽  
Changing Trends ◽  
Quality Life ◽  
Maintenance Cycle ◽  
Forward Calculation ◽  
Repair Cycle ◽  
Track Quality

Combined with the test data from track inspection car in some section of Lan-Xin railway, the paper researches the application of TQI in guiding line maintenance and repair. Analyze the changing trends of rail operation quality according to the statistical data, put forward calculation method of the average line deterioration index to the particular section, predict the track quality life and the maintenance cycle, and reasonably arrange the maintenance and repair time during line overhaul. By accurately using the value of TQI to guiding line maintenance and repair, rationally plan the best time of maintenance and repair, ensure the line in equilibrium and steady state.

scholarly journals Psychoacoustical Study for Sound Quality Index of Steady State Noise of Refrigerators

2016 ◽  
Vol 26 (5) ◽  
pp. 536-545 ◽  
Author(s):  
Kyung-Soo Kong ◽  
Weui-Bong Jung ◽  
Tae-Hoon Kim ◽  
Dae-Sik Shin ◽  
Se-jin Ahn
Keyword(s):  
Steady State ◽  
Quality Index ◽  
Sound Quality

scholarly journals Asymptotic expansion of a solution of a singularly perturbed optimal control problem with a convex integral quality index, whose terminal part additively depends on slow and fast variables

2020 ◽  
Vol 55 ◽  
pp. 33-41
Author(s):  
A.R. Danilin ◽  
A.A. Shaburov
Keyword(s):  
Optimal Control ◽  
Control System ◽  
Steady State ◽  
Quality Index ◽  
Control Variable ◽  
Small Mass ◽  
Time Interval ◽  
Terminal Part ◽  
Time Optimal ◽  
Integral Quality

The paper deals with the problem of optimal control with a Boltz-type quality index over a finite time interval for a linear steady-state control system in the class of piecewise continuous controls with smooth control constraints. In particular, we study the problem of controlling the motion of a system of small mass points under the action of a bounded force. The terminal part of the convex integral quality index additively depends on slow and fast variables, and the integral term is a strictly convex function of control variable. If the system is completely controllable, then the Pontryagin maximum principle is a necessary and sufficient condition for optimality. The main difference between this study and previous works is that the equation contains the zero matrix of fast variables and, thus, the results of A.B. Vasilieva on the asymptotic of the fundamental matrix of a control system are not valid. However, the linear steady-state system satisfies the condition of complete controllability. The article shows that problems of optimal control with a convex integral quality index are more regular than time-optimal problems.

Studies on Water in the Hydration Chamber of a Modified Electron Microscope

1970 ◽  
Vol 28 ◽  
pp. 544-545
Author(s):  
R. C. Moretz ◽  
G. G. Hausner ◽  
D. F. Parsons
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electron Microscope ◽  
Steady State ◽  
Room Temperature ◽  
Small Mass ◽  
Equilibrium Pressure ◽  
Biological Objects ◽  
Mechanical Pump ◽  
Differential Pumping

Use of the electron microscope to examine wet objects is possible due to the small mass thickness of the equilibrium pressure of water vapor at room temperature. Previous attempts to examine hydrated biological objects and water itself used a chamber consisting of two small apertures sealed by two thin films. Extensive work in our laboratory showed that such films have an 80% failure rate when wet. Using the principle of differential pumping of the microscope column, we can use open apertures in place of thin film windows.Fig. 1 shows the modified Siemens la specimen chamber with the connections to the water supply and the auxiliary pumping station. A mechanical pump is connected to the vapor supply via a 100μ aperture to maintain steady-state conditions.

Continuous hydrogenolysis of acetal-stabilized lignin in flow

2021 ◽  
Author(s):  
Wu Lan ◽  
Yuan Peng Du ◽  
Songlan Sun ◽  
Jean Behaghel de Bueren ◽  
Florent Héroguel ◽  
...  
Keyword(s):  
Steady State ◽  
Challenges And Opportunities

We performed a steady state high-yielding depolymerization of soluble acetal-stabilized lignin in flow, which offered a window into challenges and opportunities that will be faced when continuously processing this feedstock.

Network reconstruction based on steady-state data

2008 ◽  
Vol 45 ◽  
pp. 161-176 ◽  
Author(s):  
Eduardo D. Sontag
Keyword(s):  
Steady State ◽  
Reverse Engineering ◽  
Theoretical Method ◽  
Network Reconstruction ◽  
Quasi Steady State ◽  
State Data

This paper discusses a theoretical method for the “reverse engineering” of networks based solely on steady-state (and quasi-steady-state) data.

Sign in / Sign up

Export Citation Format

Share Document