@article{yeates_li_westmoreland_speight_russi_packard_frenklach_2015, title={Integrated data-model analysis facilitated by an Instrumental Model}, volume={35}, ISSN={1540-7489}, url={http://dx.doi.org/10.1016/j.proci.2014.05.090}, DOI={10.1016/j.proci.2014.05.090}, abstractNote={Abstract A paradigm is described and demonstrated for rigorously evaluating model-versus-data agreement while extracting new insights for improving the model and experiment. “Bound-to-Bound Data Collaboration” (B2B-DC) is augmented with an Instrumental Model, integrating uncertainty quantification of the reactor model, chemical model, and data analysis. The subject of analysis is a fuel-lean C2H2/O2/Ar premixed laminar flat flame, mapped with VUV-photoionization molecular-beam mass spectrometry at the Advanced Light Source of Lawrence Berkeley National Laboratory. Experimental signals were modeled with a CHEMKIN flame code augmented with an Instrumental Model. Consistency of the model and raw experimental data are determined as a quantitative measure of their agreement. Features of the mole-fraction profiles are predicted for O, OH, C2H3, and background contributions to H2O measurements. Also computed are posterior distributions of the initial targets and model parameters, as well as their correlations. This approach to model-versus-data assessment promises to advance the science and practical utility of modeling, establishing validity rigorously while identifying and ranking the impacts of specific model and data uncertainties for model and data improvements.}, number={1}, journal={Proceedings of the Combustion Institute}, publisher={Elsevier BV}, author={Yeates, Devin R. and Li, Wenjun and Westmoreland, Phillip R. and Speight, William and Russi, Trent and Packard, Andrew and Frenklach, Michael}, year={2015}, pages={597–605} }
 @article{kasper_lucassen_jasper_li_westmoreland_kohse-höinghaus_yang_wang_cool_hansen_et al._2011, title={Identification of Tetrahydrofuran Reaction Pathways in Premixed Flames}, volume={225}, ISSN={0942-9352}, url={http://dx.doi.org/10.1524/zpch.2011.0163}, DOI={10.1524/zpch.2011.0163}, abstractNote={Abstract}, number={11-12}, journal={Zeitschrift für Physikalische Chemie}, publisher={Walter de Gruyter GmbH}, author={Kasper, Tina and Lucassen, Arnas and Jasper, Ahren W. and Li, Wenjun and Westmoreland, Phillip and Kohse-Höinghaus, Katharina and Yang, Bin and Wang, Juan and Cool, Terrill A. and Hansen, Nils and et al.}, year={2011}, month={Dec}, pages={1237–1270} }
 @article{li_law_westmoreland_kasper_hansen_kohse-höinghaus_2011, title={Multiple benzene-formation paths in a fuel-rich cyclohexane flame}, volume={158}, ISSN={0010-2180}, url={http://dx.doi.org/10.1016/j.combustflame.2011.03.014}, DOI={10.1016/j.combustflame.2011.03.014}, abstractNote={Detailed data and modeling of cyclohexane flames establish that a mixture of pathways contributes to benzene formation and that this mixture changes with stoichiometry. Mole-fraction profiles are mapped for more than 40 species in a fuel-rich, premixed flat flame (ϕ = 2.0, cyclohexane/O2/30% Ar, 30 Torr, 50.0 cm/s) using molecular-beam mass spectrometry with VUV-photoionization at the Advanced Light Source of the Lawrence Berkeley National Laboratory. The use of a newly constructed set of reactions leads to an excellent simulation of this flame and an earlier stoichiometric flame (M.E. Law et al., Proc. Combust. Inst. 31 (2007) 565–573), permitting analysis of the contributing mechanistic pathways. Under stoichiometric conditions, benzene formation is found to be dominated by stepwise dehydrogenation of the six-membered ring with cyclohexadienyl ⇄ benzene + H being the final step. This finding is in accordance with recent literature. Dehydrogenation of the six-membered ring is also found to be a dominant benzene-formation route under fuel-rich conditions, at which H2 elimination from 1,3-cyclohexadiene contributes even more than cyclohexadienyl decomposition. Furthermore, at the fuel-rich condition, additional reactions make contributions, including the direct route via 2C3H3 ⇄ benzene and more importantly the H-assisted isomerization of fulvene formed from i-/n-C4H5 + C2H2, C3H3 + allyl, and C3H3 + C3H3. Smaller contributions towards benzene formation arise from C4H3 + C2H3, 1,3-C4H6 + C2H3, and potentially via n-C4H5 + C2H2. This diversity of pathways is shown to result nominally from the temperature and the concentrations of benzene precursors present in the benzene-formation zone, which are ultimately due to the feed stoichiometry.}, number={11}, journal={Combustion and Flame}, publisher={Elsevier BV}, author={Li, Wenjun and Law, Matthew E. and Westmoreland, Phillip R. and Kasper, Tina and Hansen, Nils and Kohse-Höinghaus, Katharina}, year={2011}, month={Nov}, pages={2077–2089} }
 @article{li_dai_zhang_2010, title={Location-Aided Fast Distributed Consensus in Wireless Networks}, volume={56}, ISSN={["1557-9654"]}, DOI={10.1109/tit.2010.2081030}, abstractNote={Existing works on distributed consensus explore linear iterations based on reversible Markov chains, which contribute to the slow convergence of the algorithms. It has been observed that by overcoming the diffusive behavior of reversible chains, certain nonreversible chains lifted from reversible ones mix substantially faster than the original chains. In this paper, the idea of Markov chain lifting is studied to accelerate the convergence of distributed consensus, and two general pseudoalgorithms are presented. These pseudoalgorithms are then instantiated through a class of location-aided distributed averaging (LADA) algorithms for wireless networks, where nodes' coarse location information is used to construct nonreversible chains that facilitate distributed computing and cooperative processing. Our first LADA algorithm is designed for grid networks; for a k × k grid network, it achieves an ε-averaging time of O(k log(ε-1)). Based on this algorithm, in a wireless network with transmission range r, an ε-averaging time of O(r-1 log(ε-1)) can be attained through a centralized algorithm. Subsequently, a distributed LADA algorithm is presented, achieving the same scaling law in averaging time as the centralized scheme in wireless networks for all r satisfying the connectivity requirement; the constructed chain also attains the optimal scaling law in terms of an important mixing metric, the fill time, in its class. Finally, a cluster-based LADA algorithm is proposed, which, requiring no central coordination, provides the additional benefit of reduced message complexity compared with the distributed LADA algorithm.}, number={12}, journal={IEEE TRANSACTIONS ON INFORMATION THEORY}, author={Li, Wenjun and Dai, Huaiyu and Zhang, Yanbing}, year={2010}, month={Dec}, pages={6208–6227} }
 @article{hansen_li_law_kasper_westmoreland_yang_cool_lucassen_2010, title={The importance of fuel dissociation and propargyl plus allyl association for the formation of benzene in a fuel-rich 1-hexene flame}, volume={12}, number={38}, journal={Physical Chemistry Chemical Physics}, author={Hansen, N. and Li, W. and Law, M. E. and Kasper, T. and Westmoreland, P. R. and Yang, B. and Cool, T. A. and Lucassen, A.}, year={2010}, pages={12112–12122} }
 @article{li_dai_2008, title={Energy-efficient distributed detection via multihop transmission in sensor networks}, volume={15}, ISSN={["1070-9908"]}, DOI={10.1109/LSP.2008.916720}, abstractNote={We investigate three multihop fusion schemes for distributed detection in geographically dispersed sensor networks, multihop forwarding (MF) and Log-likelihood ratio Fusion (LF), which are different in the transmitted messages, fusion rules, and communication structure. Simulation results show that transmission energy is significantly reduced by multihop fusion schemes as compared to direct transmission, with LF outperforming the others. Moreover, it is shown that LF exhibits the most favorable energy scaling law with the network size among these schemes.}, journal={IEEE SIGNAL PROCESSING LETTERS}, author={Li, Wenjun and Dai, Huaiyu}, year={2008}, pages={265–268} }
 @article{li_dai_2007, title={Distributed detection in wireless sensor networks using a multiple access channel}, volume={55}, ISSN={["1941-0476"]}, DOI={10.1109/TSP.2006.887563}, abstractNote={Distributed detection in a one-dimensional (1-D) sensor network with correlated sensor observations, as exemplified by two problems-detection of a deterministic signal in correlated Gaussian noise and detection of a first-order autoregressive [AR(1)] signal in independent Gaussian noise, is studied in this paper. In contrast with the traditional approach where a bank of dedicated parallel access channels (PAC) is used for transmitting the sensor observations to the fusion center, we explore the possibility of employing a shared multiple access channel (MAC), which significantly reduces the bandwidth requirement or detection delay. We assume that local observations are mapped according to a certain function subject to a power constraint. Using the large deviation approach, we demonstrate that for the deterministic signal in correlated noise problem, with a specially chosen mapping rule, MAC fusion achieves the same asymptotic performance as centralized detection under the average power constraint (APC), while there is always a loss in error exponents associated with PAC fusion. Under the total power constraint (TPC), MAC fusion still results in exponential decay in error exponents with the number of sensors, while PAC fusion does not. For the AR signal problem, we propose a suboptimal MAC mapping rule which performs closely to centralized detection for weakly correlated signals at almost all signal-to-noise ratio (SNR) values, and for heavily correlated signals when SNR is either high or low. Finally, we show that although the lack of MAC synchronization always causes a degradation in error exponents, such degradation is negligible when the phase mismatch among sensors is sufficiently small}, number={3}, journal={IEEE TRANSACTIONS ON SIGNAL PROCESSING}, author={Li, Wenjun and Dai, Huaiyu}, year={2007}, month={Mar}, pages={822–833} }