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Multi-Objective Evolutionary Algorithm Based on Decomposition With Orthogonal Experimental Design

EXPERT SYSTEMS 2025年第2期42卷

作者： He, Maowei Wang, Zhixue Chen, Hanning Cao, Yang Ma, Lianbo Tiangong Univ Sch Comp Sci & Technol Tianjin Peoples R China Tiangong Univ Sch Control Sci & Engn Tianjin Peoples R China China Med Univ Sch Intelligent Med Shenyang Peoples R China Northeastern Univ Coll Software Shenyang Peoples R China

Multi-objective evolutionary optimisation algorithms (MOEAs) have become a widely adopted way of solving the multi-objective optimisation problems (MOPs). The decomposition-based MOEAs demonstrate a promising performance for solving regular MOPs. However, when handling the irregular MOPs, the decomposition-based MOEAs cannot offer a convincing performance because no intersection between weight vector and the Pareto Front (PF) may lead to the same optimal solution assigned to the different weight vectors. To solve this problem, this paper proposes an MOEA based on decomposition with the orthogonal experimental design (MOEA/D-OED) that involves the selection operation, Orthogonal Experimental Design (OED) operation, and adjustment operation. The selection operation is to judge the unpromising weight vectors based on the history data of relative reduction values and convergence degree. The OED method based on the relative reduction function could make an explicit guidance for removing the worthless weight vectors. The adjustment operation brings in an estimation indicator of both diversity and convergence for adding new weight vectors into the interesting regions. To verify the versatility of the proposed MOEA/D-OED, 26 test problems with various PFs are evaluated in this paper. Empirical results have demonstrated that the proposed MOEA/D-OED outperforms eight representative MOEAs on MOPs with various types of PFs, showing promising versatility. The proposed algorithm shows highly competitive performance on all the various MOPs.

关键词： indicator irregular Pareto fronts multi-objective evolutionary optimisation algorithm orthogonal experimental design selection operation

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Performance optimization of Ag/ATO thick film resistor pastes

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SOLDERING & SURFACE MOUNT TECHNOLOGY 2025年第3期37卷 234-242页

作者： Ren, Qian Tang, Guohui Li, Xu Chen, Zheng Duan, Lei Sun, Aihua Xu, Gaojie Chinese Acad Sci Ningbo Inst Mat Technol & Engn Ningbo Peoples R China Univ Chinese Acad Sci Ctr Mat Sci & Optoelect Engn Beijing Peoples R China

PurposeThe purpose of this paper is to study and report the effects of silver (Ag) content, glass phase particle size and Ag/antimony-doped tin oxide (ATO) particle size on the properties of ATO thick film resistor pastes, especially on the microstructure, square resistance, temperature coefficient of resistance (TCR), resistance temperature curve and other properties of the ***/methodology/approachThick film resistor pastes with different Ag content, glass phase particle size and ATO particle size were printed on stainless steel substrates by screen printing technology, and a series of Ag/ATO thick film resistors (TFRs) were obtained after high-temperature sintering. The electrical properties of TFRs were evaluated. The microstructure development, square resistance, TCR and other properties of the developed TFRs were evaluated with the change in Ag content and the particle *** results show that with the increase of Ag content, the square resistance of the pastes decreases and the TCR increases. The change rate of resistance after resintering is less than 4%, and the pastes show excellent antiaging properties. Meanwhile, with the increase of the particle size of the glass phase, the square resistance decreases first and then increases, and the TCR increases first and then decreases, which has little effect on the conductive behavior. The increase in ATO particle size leads to an increase in the square resistance of TFRs and a decrease in the ***/valueThis paper provides a useful evaluation of the square resistance, TCR and other properties of Ag/ATO thick film resistor pastes, which are related to the Ag content, glass phase particle size and ATO particle size of the developed TFRs. The thick film resistor pastes with zero TCR can be obtained using Ag/ATO as the functional phase without Pd or Pt.

关键词： Screen printing Ag Thick film pastes ATO Square resistance Glass phase

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Boosting ascomycin production by n-butanol addition in fermentation of Streptomyces hygroscopicus var. ascomyceticus ATCC 14891

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BIOTECHNOLOGY AND BIOPROCESS ENGINEERING 2025年第1期30卷 160-173页

作者： Meng, Jinyu Chen, Qi Li, Youyuan Gao, Shuhong Zhang, Daojing East China Univ Sci & Technol State Key Lab Bioreactor Engn Shanghai 200237 Peoples R China

Ascomycin (FK520) is a macrolide antibiotic known for its immunosuppressive activities. In this study, we screened several short-chain alcohols for their addition in fermentation of Streptomyces hygroscopicus var. ascomyceticus ATCC 14891 to enhance the FK520 titer, particularly focusing on n-butanol addition. Optimizing the addition of 0.8% n-butanol at 27 h led to a 1.72-fold increase in FK520 yield, reaching 569.4 mg/L. This addition also elevated reactive oxygen species levels by 3.02 times compared to the control group. Analysis of CoA-esters showed significant increases in FK520 biosynthesis precursors at multiple time points, including ethylmalonyl-CoA, methylmalonyl-CoA, and malonyl-CoA. Notably, the highest ethylmalonyl-CoA content marked a 5.3-fold increase at 48 h, while the highest methylmalonyl-CoA and malonyl-CoA levels increased 4.33-fold and 3.33-fold at 72 and 120 h, respectively. Gene expression analysis via quantitative real-time RT-PCR revealed that the addition of n-butanol significantly elevated genes expression associated with the biosynthesis precursors of FK520 (fkbO and pcc), the positive regulatory gene fkbN, and the structural genes involved in FK520 biosynthesis (fkbA and fkbB). This indicates that the addition of n-butanol not only facilitates the accumulation of FK520 biosynthesis precursors but also enhances its utilization of related precursors to synthesize the secondary metabolite FK520, thereby resulting in an increased yield of FK520.

关键词： Streptomyces hygroscopicus var. ascomyceticus Ascomycin n-butanol addition Reactive oxygen species FK520 biosynthesis precursors Gene transcriptional level

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Leveraging Bibliometric Analysis to Uncover Trends, developments and Hotspots in research on Groundwater Solute Transport from 1981 to 2022

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WATER AIR AND SOIL POLLUTION 2025年第6期236卷 1-20页

作者： Deng, Fang Wu, Jichun Jiang, Jianguo Yang, Yun Meng, Yinquan Shu, Wei Nanjing Univ Sch Earth Sci & Engn Key Lab Surficial Geochem Minist Educ Nanjing Peoples R China Hohai Univ Sch Earth Sci & Engn Nanjing Peoples R China

Groundwater quality has become a critical global concern, with challenges such as seawater intrusion, contaminant leakage, and geogenic contamination. To address these varied challenges, research into the solute transport of groundwater is necessary. The present study analyzed 5,237 articles on groundwater solute transport from the Science of Citation Index Expanded (SCIE) bibliographic database spanning the years 1981 to 2022. This analysis uncovers existing research findings, explains the developmental trends and governing principles in this field and identifies some hotspots. The results reveal that both the publication volume and growth rate in the field of groundwater solute transport significantly exceed those in general scientific disciplines during the periods 1981-2000 and 2010-2022. The former period is the urgent need to solve the problem of groundwater pollution, and the latter period is the increased recognition of the importance of water resources. A critical assessment was conducted from country, institution, author and funding. Presently, research activities have been initiated by 104 countries, with the United States, china and Germany collectively contributing 66. 54%, occupying a leadership position. Despite china's growing research activity, its influence still needs to increase. The effects of uncertainty and temporal and spatial variability in groundwater systems remain great challenges for current research. With escalating attention given to the ramifications of climate change, research in this field has also begun to concentrate on the potential impact of climate change on groundwater solute transport. Future research endeavors in this domain should prioritize interdisciplinary studies and multi-factorial integrated analyses to solve environmental issues.

关键词： Groundwater quality health Solute transport Bibliometric Water resources Transport theory

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Enhanced breakdown strength and polarization behavior in relaxor ferroelectric films via bidirectional design of defect engineering and heterogeneous interface construction

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JOURNAL OF MATERIALS CHEMISTRY C 2025年第11期13卷 5555-5564页

作者： Zhang, Shuo Hao, Hua Huang, Rui Cao, Minghe Yao, Zhonghua Liu, Hanxing Wuhan Univ Technol Int Sch Mat Sci & Engn State Key Lab Adv Technol Mat Synth & Proc Wuhan 430070 Peoples R China Wuhan Univ Technol Sch Mat Sci & Engn State Key Lab Adv Technol Mat Synth & Proc Wuhan 430070 Peoples R China

Electronic power systems require the development of dielectric capacitors that combine high energy storage density and high efficiency. However, there are some unavoidable defects such as oxygen vacancies in dielectrics, which seriously deteriorate the energy storage performance. Here, a bidirectional design of defect engineering and heterogeneous interfacial construction is conducted in Fe-doped 0.8Bi0.5Na0.5TiO3-0.2Bi3.25La0.75Ti3O12 relaxor ferroelectric films to reduce leakage current and improve polarization. Simultaneously, the heterogeneous interfacial construction hinders the mass transfer process and forms more interfaces, which impede the formation of electronic pathways. The synergistic action of bidirectional design provides a substantial increase in breakdown strength, combined with excellent dielectric properties and high temperature, frequency and cycle stability. Finally, a great balance between energy storage density (83.6 J cm-3) and efficiency (74.1%) is achieved for 2 mol% Fe-doped films. This work provides a strategy for designing advanced electrostatic capacitors through defect and interface regulation.

关键词： Ferroelectric films

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Co-doped V2O5 nanozyme with excellent peroxidase- and oxidase-like activities for efficient degradation of oxytetracycline without an activator

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NEW JOURNAL OF CHEMISTRY 2025年第11期49卷 4682-4691页

作者： Li, Ruiyi Yang, Chen Li, Zaijun Jiangnan Univ Sch Chem & Mat Engn Key Lab Synthet & Biol Colloids Minist Educ Wuxi 214122 Peoples R China Jiangnan Univ Sch Life Sci & Hlth Engn Wuxi 214122 Peoples R China

Metal oxide nanozymes have shown great promise in degradation of organic pollutants because of their good structural stability, functional versatility and low cost. However, their relatively low catalytic activity restricts their wide applications. This study reports a pathway for synthesis of a Co-doped V2O5 nanozyme by introducing histidine and serine-functionalized and boron-doped graphene quantum dots (RSB-GQDs). V5+ and Co2+ were converted into a water-soluble V/Co-RSB-GQD complex via coordination and subsequently annealed to form RSB-GQD@V2O5-Co. The introduction of RSB-GQD leads to the formation of small V2O5 nanocrystals and rich oxygen vacancies as well as graphene surface modification. Co doping leads to the production of more oxygen vacancies. The integration of RSB-GQDs and Co doping significantly improves electrical conductivity, functional versatility, structural stability and affinity towards oxytetracycline. The V2O5-Co in RSB-GQD@V2O5-Co exhibits ultra-high oxidase-like activity, showing a specific activity of 125.95 U mg-1 and ultra-high peroxidase-like activity, indicating a specific activity of 893.35 U mg-1. These activities are better than those of choline oxidase and horseradish peroxidase. In the absence of an activator, the degradation efficiency of oxytetracycline reached 97.41% in 5 min, which is more than 3-fold that of only V2O5. Such an excellent catalytic behavior can be attributed to the production of multiple active species, including 1O2, O2-, (OH)-O-center dot, and electron holes induced by RSB-GQD@V2O5-Co. This study also paves a way for design and synthesis of metal oxide nanozymes with a desirable catalytic performance.

关键词： Nanocrystals

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A model to reduce tyrosine crystallization in Chinese fermented soybean curd by adjusting NaCl,ethanol and temperature during fermentation

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Food Quality and Safety 2024年第2期8卷 356-368页

作者： Jia Deng Lijun Yin Xi Yang Xin Jia College of Food Science&Nutritional Engineering China Agricultural UniversityBeijingChina

Objectives:White spots,mainly consisting of tyrosine,refer to small white particles that exist on the surface of mature Chinese fermented soybean curd or in the fermentation broth and have affected the appearance of Chinese fermented soybean *** and Methods:The study determined the composition of the white spots throughout mass spectrometry and high-performance liquid chromatography and investigated the relationship between tyrosine content,amino acid nitrogen content,depth of the proteolysis index and protease activity to interpret the mechanism of white spot formation during ***:In this study,the results confrm that tyrosine accounts for 78.22%of the white *** tyrosine content can promote the formation of white spots during *** tyrosine content,amino acid nitrogen content,depth of the proteolysis index and protease activity during the fermentation process increased during *** analysis results show that free tyrosine content was positively correlated with amino acid nitrogen content,depth of the proteolysis index and protease activity,which showed that the production of tyrosine is related to the degree of *** studies show that high concentrations of NaCl and ethanol affect the production of tyrosine and reduce its solubility,while the increase in temperature increases the solubility of *** NaCl,ethanol and temperature as infuencing factors,a mathematical model of tyrosine solubility was ***:This study lays the groundwork for understanding the mechanism of white spot formation during Chinese fermented soybean curd fermentation and provides solutions for controlling white spot formation.

关键词： Chinese fermented soybean curd white spots tyrosine mathematical modeling

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Design and preparation of a crosslinkable,oil-resistant,and bio-based elastomer from fumarate

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Science china Chemistry 2024年第2期67卷 622-631页

作者： Hui Yang Haijun Ji Xinxin Zhou Shihan Yang Liwei Li Chaoying Sun Weiwei Lei Runguo Wang Liqun Zhang Beijing State Key Laboratory of Organic-Inorganic Composites&Beijing Laboratory of Biomedical Materials Beijing University of Chemical TechnologyBeijing100029China Hubei Key Laboratory of Polymer Materials Faculty of Materials Science and EngineeringHubei UniversityWuhan430062China

Poly(diethyl fumarate-co-methoxyethyl acrylate-co-vinyl chloroacetate)(PDEFMV),a novel bio-based elastomer with a saturated structure,was synthesized via redox emulsion *** glass-transition temperatures of PDEFMV,adjusted through the variation of the diethyl fumarate-to-methoxyethyl acrylate feeding ratio,ranged from-36.1 to-14.8 ℃.The number-average molecular weights of PDEFMV ranged from 384,000 to 46,000 g/*** designing the molecular structure,vinyl chloroacetate was used to provide active sites for subsequent vulcanization and *** active chlorine groups within the PDEFMV chain reacted with the crosslinking agent trithiocyanuric acid under high temperature and pressure to form a nonsulfur crosslinked three-dimensional network *** achieve the desired properties,carbon black(CB,N330) was incorporated to reinforce PDEFMV,leading to the formation of PDEFMV/CB composites.A comprehensive study was conducted on the high-temperature oil resistance of PDEFMV/CB *** immersion in IRM903 oil at temperatures of 150 and 200 ℃ for 72 h,the mass and volume changes in PDEFMV/CB were lower than those observed in commercially available acrylate rubber(AR)/CB,indicating that PDEFMV exhibited superior oil ***,the aging characteristics and mechanisms of oil resistance in the PDEFMV/CB and AR/CB composites were investigated at different temperatures(150,200,and 250 ℃).The results provide insights into the operational temperature ranges suitable for PDEFMV/CB and offer valuable guidance for potential industrial applications.

关键词： diethyl fumarate molecular design bio-based elastomer solvent-free synthetic route high-temperature oil resistance

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Toughening of Infusible Epoxy Resins by Core/Shell Nanoparticles Plus a Soluble Thermoplastic Polymer and Their Synergistic Mechanism at the Mesoscopic Morphological Level

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ACS APPLIED POLYMER MATERIALS 2025年第5期7卷 3085-3092页

作者： Guo, Zhengyan Ning, Na Zhou, Gang Li, Yan Chen, Lei Feng, Shicheng Wei, Yi Liu, Weiping Donghua Univ Ctr Civil Aviat Composites Shanghai 201620 Peoples R China Shanghai Aircraft Mfg Co Ltd Mfg Ctr Composite Mat Commercial Aircraft COMAC Shanghai 201324 Peoples R China

To develop high-performance epoxy resins (EP) that can be used to produce aircraft primary structure composite parts via vacuum-assisted resin infusion technology (VARI), low resin viscosity and high fracture toughness requirements must be met as well as maintaining the usual thermomechanical properties. Polymeric core/shell nanoparticles have demonstrated effectiveness in achieving these objectives, but their use at high level causes reduction of composites' glass transition temperature and modulus. By investigating the fracture toughness of 180 degrees C-cured epoxy resins containing poly(2-ethylhexyl acrylate) core/poly(methyl methacrylate) shell nanoparticles (E/M), together with a poly(ether sulfone) (PES) thermoplastic polymer, the synergistic toughening effect is obtained and high fracture toughness is achieved, which is an over 101% increase in K IC over the untoughened resin, without lowering the resin properties and still having viscosities suitable for resin infusion. Morphological studies using scanning electron microscopy (SEM) led to a mesoscopic toughening model comprising macroscale "core/shell particles" formed with thermoplastic PES domains as "cores" and the polyacrylate core/shell nanoparticles as the "shells", resulting in much more effective functioning of common toughening mechanisms, i.e., crack deflection, bridging, and pinning, plastic deformation, and shear banding.

关键词： nanoparticles epoxy resin synergistic toughening fracture toughness vacuum-assisted resin infusion

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Two-photon dissociation of BeH^(+)with a middle ultraviolet band laser

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Chinese Physics B 2025年第3期34卷 348-353页

作者： Qian-Yu Zhang Wen-Li Bai Zhi-Yuan Ao Wen-Cui Peng Sheng-Guo He Xin Tong State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China University of Chinese Academy of Sciences Beijing 100049China Wuhan Institute of Quantum Technology Wuhan 430206China

Two-photon dissociation of BeH^(+)ions is studied by detecting the fluorescence changes of Be^(+)-BeH^(+)bi-component Coulomb crystal in a linear Paul ***^(+)ions generated by an exothermic reaction between electronically excited Be^(+)ions and residual H_(2) in the vacuum chamber are photon-dissociated with two photons scanning over the range of 201 nm to 208 *** experiment provides a novel method to maintain the number of Be^(+)ions stable in a Coulomb crystal with a middle ultraviolet band dissociation *** two-photon dissociation method extends the wavelength range of the dissociation laser for BeH^(+)compared to the one-photon dissociation,and the method can be utilized to all alkaline earth atomic ions which require suppression of the reaction with residual H_(2) gas in vacuum.

关键词： photo-dissociation two-photon absorption chemical reaction BeH^(+)

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