Article
Spectroscopy
Anatoly A. Saveliev, Ekaterina V. Galeeva, Dmitry A. Semanov, Roman R. Galeev, Ilshat R. Aryslanov, Tatyana S. Falaleeva, Rustam R. Davletshin
Summary: A novel adaptive noise model based on iteratively reweighted penalized least squares (ANM-IRPLS) method is proposed for Raman spectrum baseline correction, offering better results in background removal compared to existing methods.
JOURNAL OF RAMAN SPECTROSCOPY
(2022)
Article
Chemistry, Analytical
Haoran Li, Suyi Chen, Jisheng Dai, Xiaobo Zou, Tao Chen, Tianhong Pan, Melvin Holmes
Summary: The proposed method introduces a new fast burst-sparsity learning approach for baseline correction, utilizing downsampling strategy and pattern-coupled prior to overcome the limitations of existing baseline correction methods. The study demonstrates that burst-sparsity commonly occurs in peak zones of spectra and can be properly utilized to enhance baseline correction performance.
ANALYTICAL CHEMISTRY
(2022)
Article
Computer Science, Information Systems
Yanting Li, Junwei Jin, Jiangtao Ma, Fubao Zhu, Baohua Jin, Jing Liang, C. L. Philip Chen
Summary: Least squares regression has been effective in various classification tasks, but its application in imbalanced data scenarios is hindered by some deficiencies. This paper proposes an adaptive weight learning mechanism and label relaxation constraint to address the imbalanced classification problem, and experimental results show the superiority of the proposed method.
INFORMATION SCIENCES
(2023)
Article
Oncology
Jorge D. Vega, Daiki Hara, Ryder M. Schmidt, Marwan B. Abuhaija, Wensi Tao, Nesrin Dogan, Alan Pollack, John C. Ford, Junwei Shi
Summary: Using active tumor-targeting nanoparticles can enhance fluorescence imaging for sensitive tumor detection and precise radiation guidance in translational radiotherapy study. However, non-specific nanoparticle uptake can lead to high levels of background fluorescence and complicate early detection of small cancers. This study proposed an adaptive masked-based background subtraction strategy to selectively refine the background fluorescence subtraction, and demonstrated its reliability and robustness in both passive and active targeting experiments, leading to improved accuracy and sensitivity in fluorescence molecular imaging for tumor detection.
FRONTIERS IN ONCOLOGY
(2023)
Article
Mathematics
Luis Alberto Cantera-Cantera, Cristobal Vargas-Jarillo, Sergio Isai Palomino-Resendiz, Yair Lozano-Hernandez, Carlos Manuel Montelongo-Vazquez
Summary: This article introduces the classical curve-fitting problem and the related methods of least squares, total least squares, and orthogonal distances. The research shows that TLS and OD methods yield the same estimates when fitting a first-degree polynomial without an independent coefficient.
Article
Computer Science, Artificial Intelligence
Tong Wu, Rui Zhang, Ziheng Jiao, Xian Wei, Xuelong Li
Summary: This paper proposes a novel adaptive joint clustering algorithm that combines unsupervised discrete orthogonal least squares discriminant analysis (DOLSDA) and discrete spectral clustering (DSC) with adaptive neighbors and side information. The algorithm leverages both cluster and pairwise data structures by embedding DSC with the discrete kernel OLSDA (DKOLSDA) clustering. An increment scheme is developed to achieve the optimal spectral rotation for the approximate solution to the predicted indicator.
IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING
(2023)
Article
Economics
Xu Guo, Runze Li, Jingyuan Liu, Mudong Zeng
Summary: This paper proposes new statistical inference procedures for high dimensional mediation models, where both the outcome model and the mediator model are linear with high dimensional mediators. Traditional procedures for mediation analysis cannot be used due to high-dimensionality of the mediators. The paper introduces estimation procedures, penalized Wald test, and F-type test for indirect and direct effects, and applies them to study the mediation effects of financial metrics on stock reaction to COVID-19 pandemic.
JOURNAL OF ECONOMETRICS
(2023)
Article
Mathematics
Doualeh Abdillahi-Ali, Nourddine Azzaoui, Arnaud Guillin, Guillaume Le Mailloux, Tomoko Matsui
Summary: This paper examines penalized least squares estimators with convex penalties or regularization norms, providing sparsity oracle inequalities for prediction errors in a general convex penalty context, as well as for specific cases like Lasso and Group Lasso estimators in regression. The main contribution is the establishment of oracle inequalities for scenarios where observation noise stems from probability measures with weak spectral gaps, as opposed to just Gaussian distributions. The results are demonstrated on heavy-tailed and sub-Gaussian examples, with explicit bounds given for these special cases.
ACTA MATHEMATICA SCIENTIA
(2021)
Letter
Engineering, Aerospace
Azam Khalili, Vahid Vahidpour, Amir Rastegarnia, Wael M. Bazzi, Saeid Sanei
Summary: An adaptive estimation method for optimal combination weights in partial-diffusion Kalman filtering is proposed, along with mean convergence and stability analysis. Simulation results confirm superior performance compared to existing combiners, particularly benefiting sensor networks with limited accessible power.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Kun Li, Yingchao Zhang, Yuanlu Li, Baoying Liu
Summary: In this paper, both local sample correlations and nonlocal sample correlations are utilized to remove noise from ECG signals, improving signal quality and verified under simulated and real noise conditions.
CIRCUITS SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Nuclear Science & Technology
Qian Wang, Xin-Liang Yan, Xiang-Cheng Chen, Peng Shuai, Meng Wang, Yu-Hu Zhang
Summary: This study proposes a new method for assigning weights based on the Bayesian rule, which performs well in extracting baselines from spectra with different curvatures. The method proves to be more accurate and reliable with a smaller error range in experiments. It can also be applied to various spectrum-related experiments.
NUCLEAR SCIENCE AND TECHNIQUES
(2022)
Article
Automation & Control Systems
Lukasz Gorski, Malgorzata Jakubowska
Summary: This article introduces a tool, arPLS GUI, which utilizes the asymmetrically reweighted Penalized Least Squares (arPLS) method for baseline correction. Implemented in Mathworks Matlab, the tool provides a convenient graphical user interface (GUI) for fast and accurate baseline correction. It also includes a Genetic Algorithm Optimizer for parameter adjustment. The manuscript provides a detailed description of the tool and examples of its application, which can be easily reproduced.
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS
(2023)
Article
Computer Science, Artificial Intelligence
Stefania Tomasiello, Witold Pedrycz, Vincenzo Loia
Summary: This article introduces a variant of ANFIS that utilizes least-squares method with fractional Tikhonov regularization, instead of backpropagation and grid partitioning. The proposed variant simplifies the rule base, allows for handling problems with many input variables, and maintains high accuracy. The article also presents theoretical results and numerical experiments to evaluate the impact of the proposed approach on accuracy and compare it with other ANFIS-like systems.
IEEE TRANSACTIONS ON FUZZY SYSTEMS
(2022)
Article
Mathematical & Computational Biology
Yannick Vandendijck, Oswaldo Gressani, Christel Faes, Carlo G. Camarda, Niel Hens
Summary: The use of social contact rates is important in infectious disease modeling as they drive key epidemiological parameters. Contact patterns can be quantified from surveys such as POLYMOD, and age-specific rates can be estimated using smoothing techniques. This study introduces a smoothing constrained approach that emphasizes the reciprocal nature of contacts and applies it to Belgian POLYMOD data.
Article
Chemistry, Physical
Paul L. L. Houston, Chen Qu, Qi Yu, Riccardo Conte, Apurba Nandi, Jeffrey K. K. Li, Joel M. M. Bowman
Summary: This article describes a method for describing a potential energy surface using a basis of permutationally invariant polynomials. The coefficients of these polynomials are determined through numerical regression to fit a dataset of electronic energies and gradients smoothly. The article addresses questions on how to create an efficient basis, including selecting the appropriate polynomials, determining the number of polynomials needed, ensuring correct reproduction of zero interaction at large distances, maintaining special symmetries, and efficiently calculating gradients. The article also introduces programs to manipulate the polynomials and write efficient Fortran programs for energy and gradient calculations, along with a user-friendly interface for accessing symmetrization approach results. The software for these programs is publicly available.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Editorial Material
Cardiac & Cardiovascular Systems
Rui Adao, Paul R. Stoddart, Karlheinz Peter
CARDIOVASCULAR RESEARCH
(2021)
Article
Engineering, Mechanical
Novana Hutasoit, Muhammad Awais Javed, Rizwan Abdul Rahman Rashid, Scott Wade, Suresh Palanisamy
Summary: Al6061 alloy components traditionally manufactured through casting, forging, rolling, and machining processes have high scrap/waste generation. However, advanced additive manufacturing processes offer reduced material wastage potential. This study explores the mechanical and corrosion properties of Al6061 samples fabricated through cold spray additive manufacturing, highlighting the influence of build orientation and heat treatment on the material's performance. Heat treatment was found to significantly improve mechanical properties by inducing metallurgical bonding, essential for components exposed to corrosive environments.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Biotechnology & Applied Microbiology
J. L. Wood, W. C. Neil, S. A. Wade
Summary: The study found significant temporal and spatial variations in bacterial communities in ship bilges, mainly influenced by disturbance events such as cleaning and maintenance. Sessile and pelagic bacterial communities within the same bilge were notably distinct, with taxa associated with MIC functions prevalent in sessile communities. The research highlights the importance of developing standardized protocols for sampling and monitoring bilge biology to aid in the diagnosis and monitoring of MIC.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Racim Radjef, Karyn L. Jarvis, Colin Hall, Andrew Ang, Bronwyn L. Fox, Sally L. McArthur
Summary: Plasma-polymerised TMDSO films are commonly used as coatings for their abrasion resistance and barrier properties, with the ability to control their chemical structure and mechanical properties. A new RF PECVD reactor was designed to coat fibers with an energy absorbing film, showing a greater range of mechanical properties compared to a well-characterized MW PECVD reactor. The results demonstrated the potential for varied properties of TMDSO films deposited on carbon fibers using the custom-built RF PECVD reactor.
Review
Biochemical Research Methods
Geva Hilzenrat, Emma T. Gill, Sally L. McArthur
Summary: In the past decade, there has been an increasing demand for more complex, reproducible, and physiologically relevant tissue cultures that can mimic living tissues. Real-time monitoring of these tissues presents challenges due to the complexities of cell culture physical characteristics and maintenance environments. Significant advancements in optics have made optical imaging the preferred choice for many 3D cell culture monitoring applications, allowing bioengineers and biophysicists to characterize engineered living tissues non-invasively.
JOURNAL OF BIOPHOTONICS
(2022)
Article
Chemistry, Multidisciplinary
Kilian Shani Fraysse, Shane P. Meaney, Will P. Gates, Daniel P. Langley, Rico F. Tabor, Paul R. Stoddart, George W. Greene
Summary: In this study, a new phenomenon of enhancing the dissolution rate of fused silica was discovered by conducting atomic force microscopy experiments. By pressing a second, dissimilar surface against the silica and oscillating the contact pressure in deionized water, the dissolution rate was enhanced by more than 5 orders of magnitude. This enhancement was only observed at asymmetric material interfaces and exhibited characteristics consistent with the electrochemical pressure solution mechanism.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
Alfred Jia Yee Tan, Sing Muk Ng, Paul R. Stoddart, Hong Siang Chua
Summary: This paper introduces a variant U-shaped fiber structure that improves the sensitivity and stability of the sensor. It also has a simple fabrication process and compact size.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
James M. Begeng, Wei Tong, Blanca del Rosal, Michael Ibbotson, Tatiana Kameneva, Paul R. Stoddart
Summary: Patients with photoreceptor degeneration-caused blindness can partially regain vision through artificial stimulation of surviving retinal ganglion cells (RGCs). Nanoparticle-based optical sensors, specifically nanoparticle-enhanced infrared neural modulation (NINM), show potential in stimulating and inhibiting RGCs, which is important for modulating different types of RGCs. Gold nanorods with tunable absorption in the near-infrared range could be well-suited for retinal prosthesis applications but have not been demonstrated in RGCs before.
Article
Biotechnology & Applied Microbiology
S. A. Wade, J. S. Webb, R. B. Eckert, G. E. Jenneman, S. A. Rice, T. L. Skovhus, P. Sturman, S. P. Kotu, M. Richardson, D. M. Goeres
Summary: This paper summarises a round table forum held at the 2021 International Biodeterioration and Biodegradation Symposium, discussing the potential role of standards in biofilm research and industry innovation. It reviews standards and best-practice guidance in both academic research and industry impacts. The complex nature of biofilm-associated problems and limited training for industry personnel often hinder the ability to provide best-practice solutions, therefore, more effort is needed to provide consensus on standard test methods or guidance documents for studying and combating biofilms.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2023)
Article
Chemistry, Analytical
Haoran Mu, Daniel Smith, Tomas Katkus, Darius Gailevicius, Mangirdas Malinauskas, Yoshiaki Nishijima, Paul R. Stoddart, Dong Ruan, Meguya Ryu, Junko Morikawa, Taras Vasiliev, Valeri Lozovski, Daniel Moraru, Soon Hock Ng, Saulius Juodkazis
Summary: Microlens arrays (MLAs) were fabricated using a femtosecond direct laser write (fs-DLW) technique, allowing high-fidelity definition of 3D surfaces on IR transparent substrates. A graphene oxide (GO) grating acting as a linear polariser was also fabricated by fs-DLW. The MLAs and GO polarisers were characterised and their performance was simulated through numerical modelling with good agreement between experimental results and simulations.
Article
Chemistry, Analytical
Minh Nhat Dang, Surinder Singh, John H. Navarro-Devia, Hannah J. King, Rosalie K. Hocking, Scott A. Wade, Guy Stephens, Angelo Papageorgiou, James Wang
Summary: This report highlights recent advances in surface enhancement of tungsten carbide and high-speed steel cutting tools using a novel micro-machining technique. By reducing surface roughness while maintaining hardness, this method shows potential for improving tool performance, optimizing manufacturing processes, increasing tool reliability, and minimizing waste generation.
Article
Materials Science, Multidisciplinary
M. A. Javed, W. C. Neil, S. A. Wade
Summary: The presence of sulfate-reducing bacteria (SRB) in high chloride levels test media can significantly increase the crevice corrosion susceptibility of UNS30400 stainless steel, as demonstrated by electrochemical measurements.
NPJ MATERIALS DEGRADATION
(2022)
Proceedings Paper
Nanoscience & Nanotechnology
Alfred Jia Yee Tan, Kek Seng Ung, Sing Muk Ng, Paul R. Stoddart, Hong Siang Chua
Summary: This paper proposes the assembly of two U-shaped fiber probes to achieve multiparameter sensing capability, demonstrating the sensor's ability to detect refractive index, temperature, and heat source origin.
2021 IEEE INTERNATIONAL CONFERENCE ON SENSORS AND NANOTECHNOLOGY (SENNANO)
(2021)
Article
Biotechnology & Applied Microbiology
Sorel E. De Leon, Lana Cleuren, Zay Yar Oo, Paul R. Stoddart, Sally L. McArthur
Summary: Three-dimensional cell cultures are being used as tools for biologically modeling the human body, requiring sensitive characterization techniques such as impedance spectroscopy. The nature and distribution of cells within the 3D culture, as well as the architecture of the electrodes, are key variables affecting the impedance signal at different frequencies.
BIOENGINEERING-BASEL
(2021)
