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Shao Y, Tang J, Liu J, Han L, Dong S. Multivariable System Prediction Based on TCN-LSTM Networks with Self-Attention Mechanism and LASSO Variable Selection. ACS OMEGA 2023; 8:47798-47811. [PMID: 38144132 PMCID: PMC10733996 DOI: 10.1021/acsomega.3c06263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 11/16/2023] [Accepted: 11/23/2023] [Indexed: 12/26/2023]
Abstract
Intelligent prediction of key output variables that are difficult to measure online in complex systems has important research significance. In this paper, by using the least absolute shrinkage and selection operator (LASSO) algorithm to analyze the principal elements of input variables, a temporal convolutional network fused with long short-term memory (TCN-LSTM) network and self-attention mechanism (SAM) is designed to realize dynamic modeling of multivariate feature sequences. For complex processes with multiple input variables, each variable has different effects on the output, so it is necessary to use the LASSO algorithm to perform regression analysis on the input and output data for selecting the principal component variables and reducing the redundancy and computation burden of the network. The TCN network is used to extract the features of the input variables efficiently. The long-term memory performance of time series is enhanced by applying an LSTM network. The multihead SAM is used to optimize the network, and the role of key features is enhanced by assigning weights with probability to further improve the accuracy of sequence prediction. Finally, by comparison with the existing network model, the offline data generated by the high and low converters in the synthetic ammonia industry is used to predict the CO content so as to verify the superiority and applicability of the proposed network model.
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Affiliation(s)
- Yiqin Shao
- Key
Laboratory of Intelligent Textile and Flexible Interconnection of
Zhejiang Province,College of Textiles Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jiale Tang
- Engineering
Research Center of Intelligent Control for Underground Space, Ministry
of Education, China University of Mining
and Technology, Xuzhou 221116, China
- School
of Information and Control Engineering, China University of Mining and Technology, Xuzhou 221116, China
| | - Jun Liu
- Engineering
Research Center of Intelligent Control for Underground Space, Ministry
of Education, China University of Mining
and Technology, Xuzhou 221116, China
- School
of Information and Control Engineering, China University of Mining and Technology, Xuzhou 221116, China
| | - Lixin Han
- Engineering
Research Center of Intelligent Control for Underground Space, Ministry
of Education, China University of Mining
and Technology, Xuzhou 221116, China
- School
of Information and Control Engineering, China University of Mining and Technology, Xuzhou 221116, China
| | - Shijian Dong
- Engineering
Research Center of Intelligent Control for Underground Space, Ministry
of Education, China University of Mining
and Technology, Xuzhou 221116, China
- School
of Information and Control Engineering, China University of Mining and Technology, Xuzhou 221116, China
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2
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Köse E, Erkan Köse M, Güneşdoğdu Sağdınç S. Principal component analysis of quantum mechanical descriptors data to reveal the pharmacological activities of oxindole derivatives. RESULTS IN CHEMISTRY 2023. [DOI: 10.1016/j.rechem.2023.100905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023] Open
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3
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Balcı Leinen M, Lindenthal S, Heimfarth D, Zaumseil J. Networks of as-dispersed, polymer-wrapped (6,5) single-walled carbon nanotubes for selective Cu 2+ and glyphosate sensing. NANOSCALE 2022; 14:13542-13550. [PMID: 36097951 DOI: 10.1039/d2nr02517e] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Networks of semiconducting single-walled carbon nanotubes (SWNTs) can be used as the transducing layer for sensors based on water-gated transistors. To add specific sensing capabilities, SWNTs are often functionalized with additional moieties or selective membranes are applied, thus increasing the complexity of the fabrication process. Here we demonstrate that drop-cast networks of monochiral (6,5) SWNTs, which are commonly dispersed in organic solvents with the polyfluorene-bipyridine copolymer PFO-BPy, can be employed directly and without additional functionalization or ion-selective membranes to detect Cu2+ ions over a wide range of concentrations in aqueous solutions. The observed voltage shifts of water-gated transistors with these (6,5) SWNT networks directly correlate with the cupric ion concentration. They result from induced n-doping due to the complexation of positive copper ions to the bipyridine units of the wrapping polymer. Furthermore, the competitive binding of Cu2+ to the herbicide glyphosate as well as to biologically relevant pyrophosphates can be used for the direct detection and quantification of these molecules at nano- to micromolar concentrations.
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Affiliation(s)
- Merve Balcı Leinen
- Institute for Physical Chemistry, Universität Heidelberg, D-69120 Heidelberg, Germany.
| | - Sebastian Lindenthal
- Institute for Physical Chemistry, Universität Heidelberg, D-69120 Heidelberg, Germany.
| | - Daniel Heimfarth
- Institute for Physical Chemistry, Universität Heidelberg, D-69120 Heidelberg, Germany.
| | - Jana Zaumseil
- Institute for Physical Chemistry, Universität Heidelberg, D-69120 Heidelberg, Germany.
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Kavitha V, Chitra K, Gomathi A, Dhivya R, Viswanathamurthi P. Sensing of Pyrophosphate Anion by a Fluorescent Zn(II) Complex Bearing Acenaphthene Imidazole Moiety. JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1134/s1061934822070115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ghosh S, Baildya N, Goswami K, Ghosh K. Dipyrromethane‐Based Receptor for Fluorometric Sensing of Hydrogenpyrophosphate. ChemistrySelect 2021. [DOI: 10.1002/slct.202101827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sumit Ghosh
- Department of Chemistry University of Kalyani Kalyani 741235 India
| | | | - Koushik Goswami
- Department of Chemistry University of Kalyani Kalyani 741235 India
- Department of Chemistry, AIAS, Amity University - Kolkata Campus, Rajarhat Newtown, Kolkata 700135 India
| | - Kumaresh Ghosh
- Department of Chemistry University of Kalyani Kalyani 741235 India
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Park TE, Lee SH. A micellized fluorescence sensor based on amplified quenching for highly sensitive detection of non-transferrin-bound iron in serum. Dalton Trans 2020; 49:4660-4664. [PMID: 32115591 DOI: 10.1039/d0dt00026d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A novel, micelle-based fluorescence system capable of selective and sensitive signal transduction for non-transferrin-bound iron (NTBI) in serum was devised. We demonstrated that an aggregated fluorogenic core in a micelle induces amplified fluorescence quenching, which differentiates this sensing platform from the numerous fluorescence-based tools previously developed for sensitive detection.
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Affiliation(s)
- Tae Eun Park
- Department of Chemistry and Institute of Natural Sciences, Daegu University, Gyeongsan 38453, Republic of Korea.
| | - Seoung Ho Lee
- Department of Chemistry and Institute of Natural Sciences, Daegu University, Gyeongsan 38453, Republic of Korea.
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7
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Ratkovski GP, do Nascimento KTO, Pedro GC, Ratkovski DR, Gorza FDS, da Silva RJ, Maciel BG, Mojica-Sánchez LC, de Melo CP. Spinel Cobalt Ferrite Nanoparticles for Sensing Phosphate Ions in Aqueous Media and Biological Samples. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2920-2929. [PMID: 32119558 DOI: 10.1021/acs.langmuir.9b02901] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Phosphate ions perform a variety of functions in metabolic processes and are essential for all living organisms. The determination of the concentration of phosphate ions is useful in clinical diagnosis of various diseases as an inadequate phosphate level could lead to many health problems. In the search for a cost-effective method of fast monitoring, we investigated the use of cobalt ferrite nanoparticles (CoFeNPs) in the selective recognition of phosphate ions dissolved in aqueous media and more complex samples, such as human blood serum. We prepared these NPs by a chemical coprecipitation route and subjected them to annealing at 600 °C for 1 h. The successful formation of the NPs was confirmed by Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and hysteresis loop measurements. The NPs exhibited a ferrimagnetic behavior, a spinel-type crystalline structure, and hexagonal shape in the nanoscale range. We demonstrated that CoFeNPs containing immobilized fluorescent-labeled single-chain DNA (ssDNA*) probes can be applied for the fast selective detection of phosphate ions dissolved in a liquid medium. We have explored the fact that phosphate groups can displace ssDNA* probes attached to the nanoparticles, therefore causing a perceptible change in the fluorescence signal of the supernatant liquid. This detection method has been tested for the sensing of phosphate ions present both in aqueous solutions and in biological samples, with excellent selectivity and a low limit of detection (∼1.75 nM).
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Affiliation(s)
- Gabriela P Ratkovski
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brazil
| | - Kamila T O do Nascimento
- Pós-Graduação em Ciência de Materiais, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brazil
| | - Graciela C Pedro
- Pós-Graduação em Ciência de Materiais, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brazil
| | - Danilo R Ratkovski
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brazil
| | - Filipe D S Gorza
- Pós-Graduação em Ciência de Materiais, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brazil
| | - Romário J da Silva
- Pós-Graduação em Ciência de Materiais, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brazil
| | - Bruna G Maciel
- Pós-Graduação em Ciência de Materiais, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brazil
| | - Lizeth C Mojica-Sánchez
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brazil
| | - Celso P de Melo
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brazil
- Pós-Graduação em Ciência de Materiais, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brazil
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8
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Pal S, Ghosh TK, Ghosh R, Mondal S, Ghosh P. Recent advances in recognition, sensing and extraction of phosphates: 2015 onwards. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2019.213128] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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9
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Electrochemiluminescent Chemosensors for Clinical Applications: A Review. BIOCHIP JOURNAL 2019. [DOI: 10.1007/s13206-019-3301-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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10
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Jung S, Park TE, Lee SH. A self-assembled conjugated micelle with improved sensitivity for monitoring alkaline phosphatase activity. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.06.062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Jagadesan P, Schanze KS. Poly(phenylene ethynylene) Conjugated Polyelectrolytes Synthesized via Chain-Growth Polymerization. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00288] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Pradeepkumar Jagadesan
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249, United States
| | - Kirk S. Schanze
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249, United States
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12
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Xu W, Shao C, Pang J, Jiang Y, Han Y, Wang J. Electrochemical method of pyrophosphate determination by quinone reduction. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.01.096] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Jalal AH, Alam F, Roychoudhury S, Umasankar Y, Pala N, Bhansali S. Prospects and Challenges of Volatile Organic Compound Sensors in Human Healthcare. ACS Sens 2018; 3:1246-1263. [PMID: 29879839 DOI: 10.1021/acssensors.8b00400] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The chemical signatures of volatile organic compounds (VOCs) in humans can be utilized for point-of-care (POC) diagnosis. Apart from toxic exposure studies, VOCs generated in humans can provide insights into one's healthy and diseased metabolic states, acting as a biomarker for identifying numerous diseases noninvasively. VOC sensors and the technology of e-nose have received significant attention for continuous and selective monitoring of various physiological and pathophysiological conditions of an individual. Noninvasive detection of VOCs is achieved from biomatrices of breath, sweat and saliva. Among these, detection from sweat and saliva can be continuous in real-time. The sensing approaches include optical, chemiresistive and electrochemical techniques. This article provides an overview of such techniques. These, however, have limitations of reliability, precision, selectivity, and stability in continuous monitoring. Such limitations are due to lack of sensor stability and complexity of samples in a multivariate environment, which can lead to false readings. To overcome selectivity barriers, sensor arrays enabling multimodal sensing, have been used with pattern recognition techniques. Stability and precision issues have been addressed through advancements in nanotechnology. The use of various forms of nanomaterial not only enhance sensing performance, but also plays a major role in detection on a miniaturized scale. The rapid growth in medical Internet of Things (IoT) and artificial intelligence paves a pathway for improvements in human theranostics.
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Affiliation(s)
- Ahmed H. Jalal
- Department of Electrical and Computer Engineering, Florida International University, Miami, Florida 33174, United States
| | - Fahmida Alam
- Department of Electrical and Computer Engineering, Florida International University, Miami, Florida 33174, United States
| | - Sohini Roychoudhury
- Department of Electrical and Computer Engineering, Florida International University, Miami, Florida 33174, United States
| | - Yogeswaran Umasankar
- Biomolecular Sciences Institute, Florida International University, Miami, Florida 33199, United States
| | - Nezih Pala
- Department of Electrical and Computer Engineering, Florida International University, Miami, Florida 33174, United States
| | - Shekhar Bhansali
- Department of Electrical and Computer Engineering, Florida International University, Miami, Florida 33174, United States
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Beyeh NK, Díez I, Taimoory SM, Meister D, Feig AI, Trant JF, Ras RHA, Rissanen K. High-affinity and selective detection of pyrophosphate in water by a resorcinarene salt receptor. Chem Sci 2017; 9:1358-1367. [PMID: 29675184 PMCID: PMC5887233 DOI: 10.1039/c7sc05167k] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 12/15/2017] [Indexed: 11/21/2022] Open
Abstract
Pyrophosphate (PPi) is a byproduct of DNA and RNA synthesis, and abnormal levels are indicative of disease. We report the high-affinity binding of PPi in water by N-alkyl ammonium resorcinarene chloride receptors. Experimental analysis using 1H and 31P NMR, isothermal titration calorimetry, mass spectrometry, and UV-vis spectroscopy all support exceptional selectivity of these systems for PPi in water. The measured affinity of K1 = 1.60 × 107 M-1 for PPi is three orders of magnitude larger than that observed for binding to another phosphate, ATP. This exceptional anion-binding affinity in water is explored through a detailed density functional theory computational study. These systems provide a promising avenue for the development of future innovative medical diagnostic tools.
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Affiliation(s)
- Ngong Kodiah Beyeh
- Aalto University , School of Science , Department of Applied Physics , Puumiehenkuja 2 , FI-02150 , Espoo , Finland . ; .,University of Windsor , Department of Chemistry and Biochemistry , Windsor , ON N9B 3P4 , Canada .
| | - Isabel Díez
- Aalto University , School of Science , Department of Applied Physics , Puumiehenkuja 2 , FI-02150 , Espoo , Finland . ;
| | - S Maryamdokht Taimoory
- University of Windsor , Department of Chemistry and Biochemistry , Windsor , ON N9B 3P4 , Canada .
| | - Daniel Meister
- University of Windsor , Department of Chemistry and Biochemistry , Windsor , ON N9B 3P4 , Canada .
| | - Andrew I Feig
- Wayne State University , Department of Chemistry , 5101 Cass Ave. , Detroit , MI 48202 , USA
| | - John F Trant
- University of Windsor , Department of Chemistry and Biochemistry , Windsor , ON N9B 3P4 , Canada .
| | - Robin H A Ras
- Aalto University , School of Science , Department of Applied Physics , Puumiehenkuja 2 , FI-02150 , Espoo , Finland . ; .,Aalto University , School of Chemical Engineering , Department of Bioproducts and Biosystems , Kemistintie 1 , 02150 Espoo , Finland
| | - Kari Rissanen
- University of Jyvaskyla , Department of Chemistry , P. O. Box 35 , FI-40014 Jyväskylä , Finland .
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