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Author = Li, Yang;
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Displaying Results 1 - 13 of 13 on page 1 of 1
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A comprehensive experimental and modeling study of isobutene oxidation
(2016)
Zhou, Chong-Wen; Li, Yang; O'Connor, Eoin; Somers, Kieran P.; Thion, Sébastien; Ke...
A comprehensive experimental and modeling study of isobutene oxidation
(2016)
Zhou, Chong-Wen; Li, Yang; O'Connor, Eoin; Somers, Kieran P.; Thion, Sébastien; Keesee, Charles; Mathieu, Olivier; Petersen, Eric L.; DeVerter, Trent A.; Oehlschlaeger, Matthew A.; Kukkadapu, Goutham; Sung, Chih-Jen; Alrefae, Majed; Khaled, Fathi; Farooq, Aamir; Dirrenberger, Patricia; Glaude, Pierre-Alexandre Glaude; Battin-Leclerc, Frédérique; Santner, Jeffrey; Ju, Yiguang
Abstract:
Isobutene is an important intermediate in the pyrolysis and oxidation of higher-order branched alkanes, and it is also a component of commercial gasolines. To better understand its combustion characteristics, a series of ignition delay time (IDT) and laminar flame speed (LFS) measurements have been performed. In addition, flow reactor speciation data recorded for the pyrolysis and oxidation of isobutene is also reported. Predictions of an updated kinetic model described herein are compared with each of these data sets, as well as with existing jet-stirred reactor (JSR) species measurements.IDTs of isobutene oxidation were measured in four different shock tubes and in two rapid compression machines (RCMs) under conditions of relevance to practical combustors. The combination of shock tube and RCM data greatly expands the range of available validation data for isobutene oxidation models to pressures of 50 atm and temperatures in the range 666-1715 K. Isobutene flame speeds were measur...
http://hdl.handle.net/10379/6030
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A comprehensive experimental and modeling study of isobutene oxidation
(2018)
Zhou, Chong-Wen; Li, Yang; O'Connor, Eoin; Somers, Kieran P.; Thion, Sébastien; Ke...
A comprehensive experimental and modeling study of isobutene oxidation
(2018)
Zhou, Chong-Wen; Li, Yang; O'Connor, Eoin; Somers, Kieran P.; Thion, Sébastien; Keesee, Charles; Mathieu, Olivier; Petersen, Eric L.; DeVerter, Trent A.; Oehlschlaeger, Matthew A.; Kukkadapu, Goutham; Sung, Chih-Jen; Alrefae, Majed; Khaled, Fathi; Farooq, Aamir; Dirrenberger, Patricia; Glaude, Pierre-Alexandre; Battin-Leclerc, Frédérique; Santner, Jeffrey; Ju, Yiguang
http://hdl.handle.net/10379/14536
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An experimental and chemical kinetic modeling study of 1,3-butadiene combustion: Ignition delay time and laminar flame speed measurements
(2019)
Zhou, Chong-Wen; Li, Yang; Burke, Ultan; Banyon, Colin; Somers, Kieran P.; Ding, Shuiti...
An experimental and chemical kinetic modeling study of 1,3-butadiene combustion: Ignition delay time and laminar flame speed measurements
(2019)
Zhou, Chong-Wen; Li, Yang; Burke, Ultan; Banyon, Colin; Somers, Kieran P.; Ding, Shuiting; Khan, Saadat; Hargis, Joshua W.; Sikes, Travis; Mathieu, Olivier; Petersen, Eric L.; AlAbbad, Mohammed; Farooq, Aamir; Pan, Youshun; Zhang, Yingjia; Huang, Zuohua; Lopez, Joseph; Loparo, Zachary; Vasu, Subith S.; Curran, Henry J.
Abstract:
Ignition delay times for 1,3-butadiene oxidation were measured in five different shock tubes and in a rapid compression machine (RCM) at thermodynamic conditions relevant to practical combustors. The ignition delay times were measured at equivalence ratios of 0.5, 1.0, and 2.0 in 'air' at pressures of 10, 20 and 40 atm in both the shock tubes and in the RCM. Additional measurements were made at equivalence ratios of 0.3, 0.5, 1.0 and 2.0 in argon, at pressures of 1, 2 and 4 atm in a number of different shock tubes. Laminar flame speeds were measured at unburnt temperatures of 295 K, 359 K and 399 K at atmospheric pressure in the equivalence ratio range of 0.6-1.7, and at a pressure of 5 atm at equivalence ratios in the range 0.6-1.4. These experimental data were then used as validation targets for a newly developed detailed chemical kinetic mechanism for 1,3-butadiene oxidation.A detailed chemical kinetic mechanism (AramcoMech 3.0) has been developed to describe the combus...
http://hdl.handle.net/10379/14784
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An extensive experimental and modeling study of 1-butene oxidation
(2017)
Li, Yang; Zhou, Chong-Wen; Curran, Henry J.
An extensive experimental and modeling study of 1-butene oxidation
(2017)
Li, Yang; Zhou, Chong-Wen; Curran, Henry J.
Abstract:
In this study, a series of ignition delay time (IDT) experiments of 1-butene were performed in a high-pressure shock tube (HPST) and in a rapid compression machine (RCM) under conditions of relevance to practical combustors. This is the first 1-butene IDT data taken at engine relevant conditions, and the combination of HPST and RCM results greatly expands the range of data available for the oxidation of 1-butene to higher pressures (10-50 atm), lower temperatures (670-1350 K) and to a wide range of equivalence ratios (0.5-2.0).A comprehensive chemical kinetic mechanism to describe the combustion of 1-butene has simultaneously been applied. It has been validated using the IDT data measured here in addition to a large variety of literature data: IDTs, speciation data from jet-stirred reactor (JSR), premixed flame, and flow reactor, and laminar flame speed data. Important reactions have been identified via flux and sensitivity analyses including: (a) H-atom abstraction from 1-butene by...
http://hdl.handle.net/10379/6651
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BRCA1/2 mutation analysis in 41 ovarian cell lines reveals only one functionally deleterious BRCA1 mutation.
(2013)
Stordal, Britta; Timms, Kirsten; Farrelly, Angela; Gallagher, Danielle; Busschots, Stev...
BRCA1/2 mutation analysis in 41 ovarian cell lines reveals only one functionally deleterious BRCA1 mutation.
(2013)
Stordal, Britta; Timms, Kirsten; Farrelly, Angela; Gallagher, Danielle; Busschots, Steven; Renaud, Mickaël; Thery, Julien; Williams, Deborah; Potter, Jennifer; Tran, Thanh; Korpanty, Greg; Cremona, Mattia; Carey, Mark; Li, Jie; Li, Yang; Aslan, Ozlem; O'Leary, John J; Mills, Gordon B; Hennessy, Bryan T
Abstract:
Mutations in BRCA1/2 increase the risk of developing breast and ovarian cancer. Germline BRCA1/2 mutations occur in 8.6-13.7% of unselected epithelial ovarian cancers, somatic mutations are also frequent. BRCA1/2 mutated or dysfunctional cells may be sensitive to PARP inhibition by synthetic lethality. The aim of this study is to comprehensively characterise the BRCA1/2 status of a large panel of ovarian cancer cell lines available to the research community to assist in biomarker studies of novel drugs and in particular of PARP inhibitors. The BRCA1/2 genes were sequenced in 41 ovarian cell lines, mRNA expression of BRCA1/2 and gene methylation status of BRCA1 was also examined. The cytotoxicity of PARP inhibitors olaparib and veliparib was examined in 20 cell lines. The cell line SNU-251 has a deleterious BRCA1 mutation at 5564G > A, and is the only deleterious BRCA1/2 mutant in the panel. Two cell lines (UPN-251 and PEO1) had deleterious mutations as well as additional reversio...
http://hdl.handle.net/10147/324083
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Fluid inclusion characteristics and molybdenite re-os geochronology of the qulong porphyry copper-molybdenum deposit, tibet
(2018)
Li, Yang; Selby, David; Feely, Martin; Costanzo, Alessandra; Li, Xian-Hua
Fluid inclusion characteristics and molybdenite re-os geochronology of the qulong porphyry copper-molybdenum deposit, tibet
(2018)
Li, Yang; Selby, David; Feely, Martin; Costanzo, Alessandra; Li, Xian-Hua
Abstract:
The Qulong porphyry copper and molybdenum deposit is located at the southwest margin of the Lhasa Terrane and in the eastern region of the Gangdese magmatic belt. It represents China's largest porphyry copper system, with similar to 2200 million tonnes of ore comprising 0.5 % Cu and 0.03 % Mo. The mineralization is associated with Miocene granodiorite, monzogranite and quartz-diorite units, which intruded into Jurassic volcanic units in a post-collisional (Indian-Asian) tectonic setting. Field observations and core logging demonstrate the alteration and mineralization at Qulong are akin to typical porphyry copper systems in subduction settings, which comprise similar magmatic-hydrothermal, potassic, propylitic and phyllic alteration assemblages. Molybdenite Re-Os geochronology confirms the relative timeframe defined by field observations and core logging and indicates that the bulk copper and molybdenum at Qulong were deposited within 350,000 years: between 16.10 +/- 0.06 [0.08...
http://hdl.handle.net/10379/12445
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From smart cities to smart neighborhoods: detecting local events from social media
(2014)
Li, Yang; Smeaton, Alan F.
From smart cities to smart neighborhoods: detecting local events from social media
(2014)
Li, Yang; Smeaton, Alan F.
Abstract:
There are several examples of work which uses data from so- cial media to detect events which occur in our real, physical world. Our target for event detection is to partition a large geographic region, a whole city in our case, into smaller districts based on geotagged Tweets and to detect smaller local events. We generate a language model for Tweets from each district and measure the KL divergence on incoming Tweets to detect outliers. When these reach a sizable volume or intensity and are consistent, this indicates an event within that district. We used Tweets drawn from Dublin city and we describe experiments on partitioning the city into districts and detecting local events within districts.
http://doras.dcu.ie/19919/
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The oxidation of 2-butene: A high pressure ignition delay, kinetic modeling study and reactivity comparison with isobutene and 1-butene
(2017)
Li, Yang; Zhou, Chong-Wen; Somers, Kieran P.; Zhang, Kuiwen; Curran, Henry J.
The oxidation of 2-butene: A high pressure ignition delay, kinetic modeling study and reactivity comparison with isobutene and 1-butene
(2017)
Li, Yang; Zhou, Chong-Wen; Somers, Kieran P.; Zhang, Kuiwen; Curran, Henry J.
Abstract:
Butenes are intermediates ubiquitously formed by decomposition and oxidation of larger hydrocarbons (e.g. alkanes) or alcohols present in conventional or reformulated fuels. In this study, a series of novel igni-tion delay time (IDT) experiments of trans-2-butene were performed in a high-pressure shock tube (HPST) and in a rapid compression machine (RCM) under conditions of relevance to practical combustors. This is the first IDT data of trans-2-butene taken at engine relevant conditions, and the combination of HPST and RCM results greatly expands the range of data available for the oxidation of trans-2-butene to higher pressures (10-50 atm), lower temperatures (670-1350 K) and a wide range of equivalence ratios (0.5-2.0). A comprehensive chemical kinetic mechanism has simultaneously been developed to describe the combustion of trans-2-butene. It has been validated using the IDT data measured here in addition to a large variety of literature data: jet-stirred reactor (JSR) speciatio...
http://hdl.handle.net/10379/6650
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Theoretical kinetics analysis for Ḣ atom addition to 1,3-Butadiene and related reactions on the Ċ4H7 potential energy surface
(2019)
Li, Yang; Klippenstein, Stephen J.; Zhou, Chong-Wen; Curran, Henry J.
Theoretical kinetics analysis for Ḣ atom addition to 1,3-Butadiene and related reactions on the Ċ4H7 potential energy surface
(2019)
Li, Yang; Klippenstein, Stephen J.; Zhou, Chong-Wen; Curran, Henry J.
Abstract:
The oxidation chemistry of the simplest conjugated hydrocarbon, 1,3-butadiene, can provide a first step in understanding the role of polyunsaturated hydrocarbons in combustion and, in particular, an understanding of their contribution toward soot formation. On the basis of our previous work on propene and the butene isomers (1-, 2-, and isobutene), it was found that the reaction kinetics of (H) over dot-atom addition to the C=C double bond plays a significant role in fuel consumption kinetics and influences the predictions of high-temperature ignition delay times, product species concentrations, and flame speed measurements. In this study, the rate constants and thermodynamic properties for (H) over dot-atom addition to 1,3-butadiene and related reactions on the (C) over dot(4)H(7) potential energy surface have been calculated using two different series of quantum chemical methods and two different kinetic codes. Excellent agreement is obtained between the two different kinetics cod...
http://hdl.handle.net/10379/14794
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Unsaturated hydrocarbon combustion chemistry and gasoline and diesel fuel ignition: Experimental and theoretical studies
(2017)
Li, Yang
Unsaturated hydrocarbon combustion chemistry and gasoline and diesel fuel ignition: Experimental and theoretical studies
(2017)
Li, Yang
Abstract:
The primary objective of the work presented in this Thesis is to investigate the oxidation chemistry of unsaturated hydrocarbons. Butenes (1-, 2-, iso-butene) and 1,3-butadiene are the shortest olefins with structural isomers and are the simplest conjugated hydrocarbons and were thus selected as candidates to systematically elucidate their combustion chemistry using combined experimental, theoretical and kinetic modelling approaches. Experimental ignition delay time (IDT) measurements of the butenes were carried out in both a rapid compression machine (RCM) and in a high-pressure shock tube (HPST) at equivalence ratios of 0.5, 1.0, and 2.0 at engine relevant ranges of temperature (650 – 1400 K) and pressure (10 to 50 atm). A comprehensive chemical kinetic mechanism (AramcoMech 2.0) to describe the combustion of 1- and 2-butene has been developed. It has been validated using the IDT data as measured above in addition to a large variety of literature data: IDTs, species profile data a...
http://hdl.handle.net/10379/7008
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Use of lactic acid bacteria to reduce methane production in ruminants, a critical review
(2019)
Doyle, Natasha; Mbandlwa, Philiswa; Kelly, William J.; Attwood, Graeme; Li, Yang; Ross,...
Use of lactic acid bacteria to reduce methane production in ruminants, a critical review
(2019)
Doyle, Natasha; Mbandlwa, Philiswa; Kelly, William J.; Attwood, Graeme; Li, Yang; Ross, R. Paul; Stanton, Catherine; Leahy, Sinead
Abstract:
Enteric fermentation in ruminants is the single largest anthropogenic source of agricultural methane and has a significant role in global warming. Consequently, innovative solutions to reduce methane emissions from livestock farming are required to ensure future sustainable food production. One possible approach is the use of lactic acid bacteria (LAB), Gram positive bacteria that produce lactic acid as a major end product of carbohydrate fermentation. LAB are natural inhabitants of the intestinal tract of mammals and are among the most important groups of microorganisms used in food fermentations. LAB can be readily isolated from ruminant animals and are currently used on-farm as direct-fed microbials (DFMs) and as silage inoculants. While it has been proposed that LAB can be used to reduce methane production in ruminant livestock, so far research has been limited, and convincing animal data to support the concept are lacking. This review has critically evaluated the current litera...
http://hdl.handle.net/10468/8748
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Use of Lactic Acid Bacteria to Reduce Methane Production in Ruminants, a Critical Review
(2020)
Doyle, Natasha; Mbandlwa, Philiswa; Kelly, William J.; Attwood, Graeme; Li, Yang; Ross,...
Use of Lactic Acid Bacteria to Reduce Methane Production in Ruminants, a Critical Review
(2020)
Doyle, Natasha; Mbandlwa, Philiswa; Kelly, William J.; Attwood, Graeme; Li, Yang; Ross, R. Paul; STANTON, CATHERINE; Leahy, Sinead
Abstract:
Enteric fermentation in ruminants is the single largest anthropogenic source of agricultural methane and has a significant role in global warming. Consequently, innovative solutions to reduce methane emissions from livestock farming are required to ensure future sustainable food production. One possible approach is the use of lactic acid bacteria (LAB), Gram positive bacteria that produce lactic acid as a major end product of carbohydrate fermentation. LAB are natural inhabitants of the intestinal tract of mammals and are among the most important groups of microorganisms used in food fermentations. LAB can be readily isolated from ruminant animals and are currently used on-farm as direct-fed microbials (DFMs) and as silage inoculants. While it has been proposed that LAB can be used to reduce methane production in ruminant livestock, so far research has been limited, and convincing animal data to support the concept are lacking. This review has critically evaluated the current litera...
http://hdl.handle.net/11019/2324
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What makes the city pulse
(2014)
Li, Yang
What makes the city pulse
(2014)
Li, Yang
Abstract:
The topics of this thesis are event detection and social network analysis in social media. Our work centres on Geo-tagged User Generated Content (UGC) in Twitter, such as Twitter data generated from the metropolitan area of Dublin Ireland over a one month period of time. In this thesis we address the problem of how to detect small scale unexpected events using UGC both in real-time and retrospectively. We proposed a language-text joint modeling algorithm to cope with the large volume and unstructured nature of UGC. We also demonstrate our discovery of interesting correlations between a Twitter user’s social communities and their mobility patterns. Finally a set of features are proposed for carrying out Twitter user’s account type classification, for the purpose of irrelevant contents filtering. This thesis includes several experimental evaluations using real data from users and shows the performance of our algorithms in event detection and provide evidence for our discoveries.
http://doras.dcu.ie/19733/
Displaying Results 1 - 13 of 13 on page 1 of 1
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Dublin City University (2)
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