Integrated mechanism of online monitor and archive system

A new method of online monitoring ICE powers based on the crankshaft angular vibration is proposed. It has deduced that when each cylinder works uniformly at a certain rotating speed, and the vth order angular vibration mode of crankshaft nears plane vibration mode such as “quasi-rigid body model” or “quasi-trapeziform model”, so a cubic polynomial can represent the relationship between the vth order angular vibration displacement amplitude of the crankshaft reference point and the engine powers, thereby the angular vibration of reference point could be used to online monitor engine powers. Through the simulation and experimental researches on a 6240 and a 4100 diesel engine, it shows that the engine powers fitted with the angular vibration displacement amplitudes of reference point are close to the measured or theoretical powers comparatively, and the maximum errors is only 2.95%, which verifies the feasibility and practicability of the method consequently.

Download Full-text

OASIS: The OGS Archive System of Instrumental Seismology

Seismological Research Letters ◽

10.1785/0220140175 ◽

2015 ◽

Vol 86 (3) ◽

pp. 978-984 ◽

Cited By ~ 4

Author(s):

E. Priolo ◽

G. Laurenzano ◽

C. Barnaba ◽

P. Bernardi ◽

L. Moratto ◽

...

Keyword(s):

Archive System

Download Full-text

Preliminary design and implementation for HSOS data archive system

10.1117/12.460768 ◽

2002 ◽

Author(s):

Ganghua Lin

Keyword(s):

Preliminary Design ◽

Data Archive ◽

Design And Implementation ◽

Archive System

Download Full-text

High Performance Virtual Backup and Archive System

Computational Science – ICCS 2006 - Lecture Notes in Computer Science ◽

10.1007/11758532_88 ◽

2006 ◽

pp. 671-678

Author(s):

Dan Feng ◽

Lingfang Zeng ◽

Fang Wang ◽

Peng Xia

Keyword(s):

High Performance ◽

Archive System

Download Full-text

Semi-continuous gas and inorganic aerosol measurements at a Finnish urban site: comparisons with filters, nitrogen in aerosol and gas phases, and aerosol acidity

Atmospheric Chemistry and Physics Discussions ◽

10.5194/acpd-12-4755-2012 ◽

2012 ◽

Vol 12 (2) ◽

pp. 4755-4796 ◽

Cited By ~ 3

Author(s):

U. Makkonen ◽

A. Virkkula ◽

J. Mäntykenttä ◽

H. Hakola ◽

P. Keronen ◽

...

Keyword(s):

Particle Number ◽

Road Traffic ◽

Large Fraction ◽

Inorganic Ions ◽

Urban Site ◽

Vehicle Exhaust ◽

Gas Phases ◽

Aerosol Acidity ◽

Inorganic Aerosol ◽

Online Monitor

Abstract. Concentrations of 5 gases (HCl, HNO3, HONO, NH3, SO2) and 8 major inorganic ions in particles (Cl−, NO3−, SO42−, NH4+, Na+, K+, Mg2+, Ca2+) were measured with an online monitor MARGA 2S in two size ranges, Dp < 2.5 μm and Dp < 10 μm, in Helsinki, Finland from November 2009 to May 2010. The results were compared with filter sampling, mass concentrations obtained from particle number size distributions, and a conventional SO2 monitor. The MARGA yielded lower concentrations than those analyzed from the filter samples for most ions. Linear regression yielded MARGA vs. filter slopes of 0.68, 0.89, 0.84, 0.52, 0.88, 0.17, 2.88, and 3.04 for Cl−, NO3−, SO42−, NH4+, Na+, K+, Mg2+, and Ca2+, respectively, and 0.90 for the MARGA vs. SO2 monitor. There were clear seasonal cycles in the concentrations of the nitrogen-containing gases: the median concentrations of HNO3, HONO, and NH3 were 0.09 ppb, 0.37 ppb, and 0.01 ppb in winter, respectively, and 0.15, 0.15, and 0.14 in spring, respectively. The gas-phase fraction of nitrogen decreased roughly with decreasing temperature so that in the coldest period from January to February the median contribution was 28% but in April to May 53%. There were also large fractionation variations that temperature alone cannot explain. HONO correlated well with NOx but a large fraction of the HONO-to-NOx ratios were larger than published ratios in a road traffic tunnel suggesting that a large amount of HONO had other sources than vehicle exhaust. Aerosol acidity was estimated by calculating ion equivalent ratios. The sources of acidic aerosols were studied with trajectory statistics that showed that continental aerosol is mainly neutralized and marine aerosol acidic.

Download Full-text