Article
Computer Science, Artificial Intelligence
Yimiao Gao, Yuehan Yang
Summary: This paper proposes a method called JETS that utilizes auxiliary models from different groups to estimate the target model. By constructing a penalized framework that combines penalties for the target model and the differences between auxiliary models and the target model, JETS overcomes the challenge of limited samples in high-dimensional studies and obtains stable and accurate estimates, regardless of noisy information in the auxiliary samples.
PATTERN RECOGNITION
(2023)
Article
Biology
X. Nie, S. Wager
Summary: The article introduces a general two-step algorithm for estimating heterogeneous treatment effects, which is flexible and easy to use, and has several advantages over existing methods, showing promising performance in simulation setups.
Article
Social Sciences, Interdisciplinary
Kim Sia Ling, Siti Suhana Jamaian, Syahira Mansur, Alwyn Kwan Hoong Liew
Summary: This study develops a credit scoring model based on tenants' characteristics using multivariable logistic regression, without considering their credit history. Rental information of tenants was collected from a landlord company in Malaysia, and parameters were estimated using penalized maximum likelihood estimation. The main factors influencing tenants' credit score are the number of months late payment, expense-to-income ratio, gender, previous monthly rent, and age.
Article
Multidisciplinary Sciences
Galal M. Abdella, Khaled Shaaban
Summary: The study demonstrates that the Lasso-GzLM method can accurately assess the impact of adverse weather on pedestrian injuries, especially in the presence of high collinearity. The results show that adverse weather conditions have an insignificant impact on pedestrian injury counts.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
C. Cappello, S. De Iaco, S. Maggio, D. Posa
Summary: This paper explores the application of complex-valued random fields in describing vector data with two components and discusses the modeling of joint spatial and temporal behavior using complex-valued covariance models. By analyzing current data from the US East and Gulf Coast, the comparative analysis between two different complex-valued covariance models is presented.
SPATIAL STATISTICS
(2022)
Article
Engineering, Chemical
Adam Yonge, Gabriel S. Gusmao, Rakesh Batchu, M. Ross Kunz, Zongtang Fang, Rebecca Fushimi, Andrew J. Medford
Summary: This paper proposes a framework for quantifying initial state uncertainties in transient measurements using the temporal analysis of products (TAP) reactor. Two methods are introduced to approximate parameter variances and provide insights into the structural certainty of the model. The initial state covariance matrix can be merged with the experimental noise covariance matrix to provide a unified description of parameter uncertainties for TAP experiments.
Article
Automation & Control Systems
Carl Emil Eskildsen, Tormod Naes, Peter B. Skou, Lars Erik Solberg, Katinka R. Dankel, Silje A. Basmoen, Jens Petter Wold, Siri S. Horn, Borghild Hillestad, Nina A. Poulsen, Mette Christensen, Theo Pieper, Nils Kristian Afseth, Soren B. Engelsen
Summary: This paper discusses the concept of the cage of covariance in analytical chemistry, where indirect relationships between response and explanatory variables may affect the calibration of multivariate models. It highlights the importance of considering use of the models and validity of indirect relationships in future samples. Additionally, it explores the hidden role of interfering compounds in calibration models and the potential consequences of strong covariance relationships between analyte estimates and interfering compounds.
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS
(2021)
Article
Mathematics, Interdisciplinary Applications
Baolei Wei
Summary: The study proposes an integral SINDy (ISINDy) method to identify the model structure and parameters of nonlinear ordinary differential equations (ODEs) from noisy time-series observations. The approach combines penalized spline smoothing and sequential threshold least squares to achieve sparse pseudo linear regression and extract the fewest active terms. The method shows accuracy and robustness to noise in various simulations.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Engineering, Environmental
Lilliana Brandao, Eric A. High, Taek-Seung Kim, Christian Reece
Summary: The Temporal Analysis of Products (TAP) experiment can provide valuable insights into heterogenous catalytic materials. This study demonstrates that precise TAP experiments can be conducted on smaller and simpler systems than previously thought possible. By using readily available components, the pulse reactors described in this work can be easily assembled and operated. The development of these simplified TAP experiments opens up the technique to a wider range of researchers.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Computer Science, Artificial Intelligence
Tobias Glasmachers, Oswin Krause
Summary: This article introduces the characteristics and performance of the class of algorithms called Hessian Estimation Evolution Strategies (HE-ESs), and provides two strong guarantees for the (1 + 4)-HE-ES algorithm: stability of covariance matrix update and linear convergence on all convex quadratic problems, regardless of the problem instance.
EVOLUTIONARY COMPUTATION
(2022)
Article
Statistics & Probability
Xiong Cai, Liugen Xue, Jiguo Cao
Summary: The paper introduces a robust method for function-on-function linear regression using M-estimation and penalized spline regression, which is able to handle atypical observations effectively. Through several simulation studies and two real data examples, the efficiency and performance of the proposed method are demonstrated.
Article
Mathematical & Computational Biology
Karl Oskar Ekvall, Aaron J. Molstad
Summary: We propose a new method for multivariate response regression and covariance estimation when elements of the response vector are of mixed types. The method is based on a model that connects the observable mixed-type response vector to a latent multivariate normal response linear regression through a link function. We also propose a novel algorithm for approximate maximum likelihood estimation that works with different combinations of response types and scales well in the dimension of the response vector.
STATISTICS IN MEDICINE
(2022)
Article
Acoustics
Zhong-Rong Lu, Dahao Yang, Linchong Huang, Li Wang
Summary: This research introduces a covariance regression procedure for operational modal analysis, which utilizes linear dependence to obtain modal parameters. The effectiveness of the method in handling harmonic load, large damping, and closely spaced modes is verified through numerical examples and a field test case.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Computer Science, Interdisciplinary Applications
Hone-Jay Chu, Muhammad Zeeshan Ali, Thomas J. Burbey
Summary: This study estimated high spatio-temporal resolution land subsidence through data fusion, revealing that subsidence hotspots vary with time and space, aiding in explaining the spatio-temporal variability of the subsidence pattern.
ENVIRONMENTAL MODELLING & SOFTWARE
(2021)
Article
Environmental Sciences
Abdul Hai, G. Bharath, Muhammad Daud, K. Rambabu, Imtiaz Ali, Shadi W. Hasan, PauLoke Show, Fawzi Banat
Summary: Pyrolysis of groundnut shell at 500 degrees C produced high yields of pyrolytic-oil, biochar, and biogas. GC-MS analysis identified major components in the bio-oil with applications in biofuel, pharmaceutical, and food industries. An ANN model was developed to predict decomposition behavior and thermodynamic parameters were estimated using a non-isothermal model-free method.
Article
Chemistry, Applied
M. Ross Kunz, Adam Yonge, Xiaolong He, Rakesh Batchu, Zongtang Fang, Yixiao Wang, Gregory S. Yablonsky, Andrew J. Medford, Rebecca R. Fushimi
Summary: The TAP reactor provides valuable transient kinetic information, but preprocessing is necessary to reduce measurement uncertainty caused by noise and drift. Traditional preprocessing methods rely on user discretion and separate calibration experiments, while the proposed methodology uses machine learning techniques and physical constraints to improve the chemical kinetic signal.
Article
Chemistry, Physical
Sushree Jagriti Sahoo, Xin Jing, Phanish Suryanarayana, Andrew J. Medford
Summary: In this study, the convergence of surface properties and electronic gap of rutile titania nanoparticles with particle size was investigated using hybrid and generalized gradient approximation (GGA) level density functional theory (DFT) calculations. The results showed that the geometric finite size effects in surface energy vanish when the minimum length scale of the nanoparticles becomes greater than 10 angstrom, while the finite size effects on the electronic gap and density of states (DOS) are highly dependent on the shape and size of the particles.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Engineering, Chemical
Adam Yonge, Gabriel S. Gusmao, Rakesh Batchu, M. Ross Kunz, Zongtang Fang, Rebecca Fushimi, Andrew J. Medford
Summary: This paper proposes a framework for quantifying initial state uncertainties in transient measurements using the temporal analysis of products (TAP) reactor. Two methods are introduced to approximate parameter variances and provide insights into the structural certainty of the model. The initial state covariance matrix can be merged with the experimental noise covariance matrix to provide a unified description of parameter uncertainties for TAP experiments.
Article
Chemistry, Applied
Yixiao Wang, Bingwen Wang, Sagar Sourav, Rakesh Batchu, Zongtang Fang, M. Ross Kunz, Gregory Yablonsky, Eranda Nikolla, Rebecca Fushimi
Summary: In this study, the influence of surface and gas phase oxygen on the selective conversion of CH4 to C2H4 over the Mn-Na2WO4/SiO2 catalyst was investigated using Temporal Analysis of Products (TAP) and steady-state experiments. It was found that methane activation predominantly occurs via a short-lived, transient surface oxygen species on the catalyst, and there is competition between this species to form CO or methyl radicals on the surface. The concentration of the transient surface oxygen species was found to significantly impact the oxidative coupling of methane performance.
Article
Chemistry, Applied
Gabriel S. Gusmao, Adhika P. Retnanto, Shashwati C. da Cunha, Andrew J. Medford
Summary: Chemical kinetics and reaction engineering provide a framework for understanding reaction mechanisms, optimizing reaction performance, and designing chemical processes. This study utilizes artificial neural networks and mathematical models to solve inverse kinetic ordinary differential equations (ODEs). The simultaneous training of neural nets and kinetic model parameters can estimate the kinetic parameters from synthetic experimental data and assist in elucidating reaction mechanisms based on transient data.
Article
Chemistry, Physical
Mathew J. Rasmussen, Sean Najmi, Giada Innocenti, Andrew J. Medford, Carsten Sievers, J. Will Medlin
Summary: The (retro-)aldol condensation of acetaldehyde to crotonaldehyde was studied using supported molybdenum oxide catalysts. Highly dispersed MoOx catalysts exhibited optimal performance when supported on γ-Al2O3, while MoOx particles supported on SiO2 showed a monotonic relationship between Mo loading and condensation activity. Lewis acid site density and strength were important parameters for predicting activity. Weak acid sites had poor correlation with activity, while medium and strong acid sites showed good correlations. Partially reduced MoOx was more active for aldol condensation, but pretreatment in reducing or oxidizing environments had no significant effect on catalytic activity. Catalysts with high densities of strong acid sites tended to form more carbonaceous deposits on the surface during the reaction.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Physical
Yixiao Wang, Sagar Sourav, Jason P. Malizia, Brooklyne Thompson, Bingwen Wang, M. Ross Kunz, Eranda Nikolla, Rebecca Fushimi
Summary: This study investigates the role of individual oxide phases and their combinations in supported Mn-Na2WO4 /SiO2 catalysts for oxidative coupling of methane (OCM). It is found that Mn plays an important role in promoting gas phase oxygen activation, while NaOx/SiO2 and WOx/SiO2 are relatively inert. The supported catalyst combining Na and W in the form of Na2WO4 shows enhanced gas-phase oxygen activation and methane activation. However, excessive Mn content leads to nonselective OCM pathways.
Article
Biotechnology & Applied Microbiology
Yu-Yen Chen, M. Ross Kunz, Xiaolong He, Rebecca Fushimi
Summary: Data-driven approaches are revolutionizing the field of heterogenous catalysis by utilizing machine learning, experimental data, and quantum mechanical calculations to advance catalyst design. This survey provides an overview of recent progress in catalysis informatics, discussing applications in experimental data analysis, prediction of catalytic properties, construction of reaction networks, and large-scale quantum mechanical simulations.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Mostafa Faghih Shojaei, John E. Pask, Andrew J. Medford, Phanish Suryanarayana
Summary: In this study, we use multi-objective optimization to maximize the softness of pseudopotentials while maintaining high accuracy and transferability. An evolutionary algorithm is employed to solve the optimization problem and generate a comprehensive table of optimized pseudopotentials. The results show that these pseudopotentials are softer and more accurate compared to existing tables, offering the potential to speed up calculations in various applications.
COMPUTER PHYSICS COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Andrew J. Medford, Carsten Sievers, Sean Najmi, Charles L. Liotta
Summary: The interaction between erythrose and various metal oxides was investigated using solid-state nuclear magnetic resonance spectroscopy. The impregnation of erythrose onto these oxides resulted in a shift in the equilibrium between cyclic, linear, and hydrated erythrose on the oxide surfaces. The effect of temperature on the surface species was dependent on the type of metal oxide.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Bor-Rong Chen, Cody M. Walker, Sangwook Kim, M. Ross Kunz, Tanvir R. Tanim, Eric J. Dufek
Summary: This study develops a machine-learning framework to distinguish different aging modes of lithium-ion batteries by recording electrochemical signatures. The accuracy of aging mode classification reaches 86% within the first 50 cycles and increases to 88% beyond 225 cycles. The same features can also quantify the percentage of end-of-life loss of active materials with only 4.3% error.
Article
Chemistry, Physical
Yiqin Hu, Zongtang Fang, Monica Vasiliu, David A. Dixon
Summary: The dehydration and dehydrogenation of ethanol on (TiO2)(n), n = 2-4 nanoclusters were studied using density functional theory. Physisorption and chemisorption of ethanol on the trimer and tetramer at the bridge Ti site were found to be thermodynamically favorable compared to the Ti site with a terminal Ti+O. Different reaction coordinates for dehydration were predicted for the dimer, trimer, and tetramer. The results of the nanoclusters for n = 3 and 4 are in line with experimental findings on the reactivity of ethanol on TiO2 (110) surface sites.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Chemistry, Physical
Iman Nezam, Wei Zhou, Dhrumil R. Shah, Maxim P. Bukhovko, Madelyn R. . Ball, Gabriel S. Gusma, Andrew J. Medford, Christopher W. Jones
Summary: The direct conversion of carbon dioxide into aromatic compounds provides an environmentally friendly resource for aromatic chemicals with high global demand. Bifunctional catalysts composed of ZnZrOx and ZSM-5 showed improved aromatics yields by decreasing the ZSM-5 domain size. However, for a physical mixture of catalyst components, the particle size of ZnZrOx increased due to the inverse impact of ZSM-5 crystal size, resulting in enhanced diffusion barriers for small crystals of ZSM-5. Larger crystals of ZSM-5 can be used to obtain a higher concentration of benzene, toluene, and xylene.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Computer Science, Artificial Intelligence
Yuge Hu, Joseph Musielewicz, Zachary W. Ulissi, Andrew J. Medford
Summary: Uncertainty quantification is crucial for machine learning force fields. In this work, we propose a method that combines conformal prediction with the distances in the neural network's latent space to estimate the uncertainty of neural network force fields. We find that this method performs well under the assumption of independent and identically-distributed data and is relatively insensitive to hyperparameter selection.
MACHINE LEARNING-SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Environmental
Xinping Zhang, Yuxin Guo, Xiaoyang Liu, Shun-Yu Wu, Ya-Xuan Zhu, Shao-Zhe Wang, Qiu-Yi Duan, Ke-Fei Xu, Zi-Heng Li, Xiao-Yu Zhu, Guang-Yu Pan, Fu-Gen Wu
Summary: This study develops a nanotrigger HCFT for simultaneous photodynamic therapy and light-triggered ferroptosis therapy. The nanotrigger can relieve tumor hypoxia, induce enhanced photodynamic reaction, and facilitate the continuation of Fenton reaction, ultimately leading to lethal ferroptosis in tumor cells.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Olumide Bolarinwa Ayodele, Toyin Daniel Shittu, Olayinka S. Togunwa, Dan Yu, Zhen-Yu Tian
Summary: This study focused on the semihydrogenation of acetylene in an ethylene-rich stream using two alloyed Pt catalysts PtCu and PtCo. The PtCu catalyst showed higher activity and ethylene yield compared to PtCo due to its higher unoccupied Pt d-orbital density. This indicates that alloying Pt with Cu is more promising for industrial relevant SHA catalyst.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Guowei Chen, Wen-Cheng Chen, Yaozu Su, Ruicheng Wang, Jia-Ming Jin, Hui Liang, Bingxue Tan, Dehua Hu, Shaomin Ji, Hao-Li Zhang, Yanping Huo, Yuguang Ma
Summary: This study proposes an intramolecular dual-locking design for organic luminescent materials, achieving high luminescence efficiency and performance for deep-blue organic light-emitting diodes. The material also exhibits unique mechanochromic luminescence behavior and strong fatigue resistance.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Joren van Stee, Gregory Hermans, Jinu Joseph John, Koen Binnemans, Tom Van Gerven
Summary: This work presents a continuous solvent extraction method for the separation of cobalt and nickel in a millifluidic system using Cyphos IL 101 (C101) as the extractant. The optimal conditions for extraction performance and solvent properties were determined by investigating the effects of channel length, flow rate, and temperature. The performance of a developed manifold structure was compared to a single-channel system, and excellent separation results were achieved. The continuous separation process using the manifold structure resulted in high purity cobalt and nickel products.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Yan Xu, Jingai Jiang, Xinyi Lv, Hui Li, Dongliang Yang, Wenjun Wang, Yanling Hu, Longcai Liu, Xiaochen Dong, Yu Cai
Summary: A programmed gas release nanoparticle was developed to address the challenges in treating diabetic infected wounds. It effectively removes drug-resistant pathogens and remodels the wound microenvironment using NO and H2S. The nanoparticle can eliminate bacteria and promote wound healing through antibacterial and anti-inflammatory effects.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Tong Xia, Zhilin Xi, Lianquan Suo, Chen Wang
Summary: This study investigated a highly efficient coal dust suppressant with low initial viscosity and high adhesion-solidification properties. The results demonstrated that the dust suppressant formed a network of multiple hydrogen bonding cross-linking and achieved effective adhesion and solidification of coal dust through various chemical reactions.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jinzhi Cai, Zhenshan Li
Summary: A density functional theory-based rate equation was developed to predict the gas-solid reaction kinetics of CaO carbonation with CO2 in calcium looping. The negative activation energy of CaO carbonation close to equilibrium was accurately predicted through experimental validation.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jianxiong Chen, Fuhao Ren, Ningning Yin, Jie Mao
Summary: This study presents an economically efficient and easily implementable surface modification approach to enhance the high-temperature electrical insulation and energy storage performance of polymer dielectrics. The self-assembly of high-insulation-performance boron nitride nanosheets (BNNS) on the film surface through electrostatic interactions effectively impedes charge injection from electrodes while promoting charge dissipation and heat transfer.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Zijian Li, Zhaohui Yang, Shao Wang, Hongxia Luo, Zhimin Xue, Zhenghui Liu, Tiancheng Mu
Summary: This study reports a strategy for upgrading polyester plastics into value-added chemicals using electrocatalytic methods. By inducing the targeted transfer of *OH species, polyethylene terephthalate was successfully upgraded into potassium diformate with high purity. This work not only develops an excellent electrocatalyst, but also provides guidance for the design of medium entropy metal oxides.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Navneet Singh Shekhawat, Surendra Kumar Patra, Ashok Kumar Patra, Bamaprasad Bag
Summary: This study primarily focuses on developing a sulphur dyeing process at room temperature using bacterial Lysate, which is environmentally friendly, energy and cost effective, and sustainable. The process shows promising improvements in dye uptake and fastness properties.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Dengjia Shen, Hongyang Ma, Madani Khan, Benjamin S. Hsiao
Summary: This study developed cationic PVC nanofibrous membranes with high filtration and adsorption capability for the removal of bacteria and hexavalent chromium ions from wastewater. The membranes demonstrated remarkable performance in terms of filtration efficiency and maximum adsorption capacity. Additionally, modified nanofibrous membranes were produced using recycled materials and showed excellent retention rates in dynamic adsorption processes.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Xiaoyan Wang, Zhikun Wang, Ben Jia, Chunling Li, Shuangqing Sun, Songqing Hu
Summary: Inspired by photosystem II, self-supported Fe-doped NiCoP nanowire arrays modified with carboxylate were constructed to boost industrial-level overall water splitting by employing the concerted proton-coupled electron transfer mechanism. The introduction of Fe and carboxyl ligand led to improved catalytic activity for HER and OER, and NCFCP@NF exhibited long-term durability for overall water splitting.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Pengyao Yu, Ge Yang, Yongming Chai, Lubomira Tosheva, Chunzheng Wang, Heqing Jiang, Chenguang Liu, Hailing Guo
Summary: Thin LTA zeolite membranes were prepared through secondary growth of nano LTA seeds in a highly reactive gel, resulting in membranes with superior permeability and selectivity in gas separation applications.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Baiqin Zhou, Huiping Li, Ziyu Wang, Hui Huang, Yujun Wang, Ruichun Yang, Ranran Huo, Xiaoyan Xu, Ting Zhou, Xiaochen Dong
Summary: The use of machine learning to predict the performance of specific adsorbents in phosphate adsorption shows great promise in saving time and revealing underlying mechanisms. However, the small size of the dataset and insufficient detailed information limits the model training process and the accuracy of results. To address this, the study employs a fuzzing strategy that replaces detailed numeric information with descriptive text messages on the physiochemical properties of adsorbents. This strategy allows the recovery of discarded samples with limited information, leading to accurate prediction of adsorption amount, capacity, and kinetics. The study also finds that phosphate uptake by adsorbents is generally through physisorption, with some involvement of chemisorption. The framework established in this study provides a practical approach for quickly predicting phosphate adsorption performance in urgent scenarios, using easily accessible information.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Paula Alejandra Lamprea Pineda, Joren Bruneel, Kristof Demeestere, Lisa Deraedt, Tex Goetschalckx, Herman Van Langenhove, Christophe Walgraeve
Summary: This study evaluates the use of four esterified fatty acids and three vegetable oils as absorption liquids for hydrophobic VOCs. The experimental results show that isopropyl myristate is the most efficient liquid for absorbing the target VOCs.
CHEMICAL ENGINEERING JOURNAL
(2024)