Yunfeng Zhang
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View article: A Study on Optimizing the Thermal Performance of Coaxial Heat Exchanger Systems in Medium-Deep Geothermal Wells
A Study on Optimizing the Thermal Performance of Coaxial Heat Exchanger Systems in Medium-Deep Geothermal Wells Open
Medium-deep geothermal energy is a key renewable source, but existing coaxial downhole heat exchanger (DHE) systems suffer from low efficiency and temperature decay. This study evaluates the impacts of circulating flow rate, inlet temperat…
View article: Spatiotemporal Variability and Driving Factors of Vegetation Net Primary Productivity in the Yellow River Basin (Shaanxi Section) from 2000 to 2022
Spatiotemporal Variability and Driving Factors of Vegetation Net Primary Productivity in the Yellow River Basin (Shaanxi Section) from 2000 to 2022 Open
Net primary productivity (NPP) is a key metric for assessing ecosystem functionality and sustainability. This study utilized MOD17A3 NPP data in conjunction with trend analysis, a gravity center model, and the Geodetector method to examine…
View article: Organocatalyzed asymmetric [2+2] cycloaddition of saccharin-derived endocyclic ketimines and allenoates for the synthesis of fused azetidines
Organocatalyzed asymmetric [2+2] cycloaddition of saccharin-derived endocyclic ketimines and allenoates for the synthesis of fused azetidines Open
We report a novel enantioselective [2 + 2] cycloaddition of allenoate and endocyclic ketimine derived from saccharin, catalyzed by a chiral tertiary amine. The methodology enables the synthesis of fused tricyclic azetidines with a quaterna…
View article: The GeV $γ$-ray emission from the composite SNR CTB 87
The GeV $γ$-ray emission from the composite SNR CTB 87 Open
We report the GeV $γ$-ray emission around the composite supernova remnant (SNR) CTB 87 with more than 16 yrs PASS 8 data recorded by the Fermi Large Area Telescope. Two separate point sources with the different GeV spectra are identified i…
View article: Machine Learning and Untargeted Volatomics-Based Research Strategies for Characterizing the Age Feature of Human Foot Odor
Machine Learning and Untargeted Volatomics-Based Research Strategies for Characterizing the Age Feature of Human Foot Odor Open
View article: Machine learning and untargeted volatomics-based research strategies for characterizing the age feature of human foot odor
Machine learning and untargeted volatomics-based research strategies for characterizing the age feature of human foot odor Open
View article: Ultra-Sensitive On-Site Profiling of Etomidate in Emerging Environmental Matrices Via a Controlled Substance Release Simulator Coupled with Uplc-Hrms
Ultra-Sensitive On-Site Profiling of Etomidate in Emerging Environmental Matrices Via a Controlled Substance Release Simulator Coupled with Uplc-Hrms Open
View article: Research on PBS buffer scheduling strategy problems based on genetic algorithms
Research on PBS buffer scheduling strategy problems based on genetic algorithms Open
In automotive manufacturing, production constraints between the painting and assembly workshops often disrupt the vehicle production sequence. To solve this, a Painted Body Store (PBS) buffer was introduced. This adjusts the sequence from …
View article: AKT1 as a therapeutic target for platinum-resistant SOX2positive ovarian cancer cells
AKT1 as a therapeutic target for platinum-resistant SOX2positive ovarian cancer cells Open
Ovarian cancer remains the most lethal gynecological malignancy, largely owing to its chemotherapy resistance and high recurrence rate. Emerging evidence has linked aberrant SOX2 expression with chemoresistance and poor prognosis of ovaria…
View article: Efficient and harmless removal of insecticide diazinon via the stepwise combination of biodegradation and photodegradation
Efficient and harmless removal of insecticide diazinon via the stepwise combination of biodegradation and photodegradation Open
Diazinon, an organophosphorus insecticide, is predominantly removed through photodegradation and biodegradation in the environment. However, photodegradation can generate diazoxon, a highly toxic oxidation byproduct, while biodegradation i…
View article: Design of novel glass fiber reinforced polypropylene cable-anchor component and its long-term properties exposed in alkaline solution
Design of novel glass fiber reinforced polypropylene cable-anchor component and its long-term properties exposed in alkaline solution Open
The high performance and long life of engineering structures can be realized through replacing traditional steel materials with glass fiber reinforced polypropylene composites with high toughness/durability, flexibility design and recyclin…
View article: Soil Microplastic Pollution and Microbial Breeding Techniques for Green Degradation: A Review
Soil Microplastic Pollution and Microbial Breeding Techniques for Green Degradation: A Review Open
Microplastics (MPs), found in many places around the world, are thought to be more detrimental than other forms of plastics. At present, physical, chemical, and biological methods are being used to break down MPs. Compared with physical an…
View article: The Easily Overlooked Effect of Global Warming: Diffusion of Heavy Metals
The Easily Overlooked Effect of Global Warming: Diffusion of Heavy Metals Open
Since industrialization, global temperatures have continued to rise. Human activities have resulted in heavy metals being freed from their original, fixed locations. Because of global warming, glaciers are melting, carbon dioxide concentra…
View article: Microstructure and failure mechanism of Y2O3 coating on the W fiber in Wf/W composites during field assisted sintering
Microstructure and failure mechanism of Y2O3 coating on the W fiber in Wf/W composites during field assisted sintering Open
For tungsten fiber-reinforced tungsten matrix (Wf/W) composites, the interfacial microstructure is essential for the improvement of mechanical properties. The Y2O3 coating deposited on the W fiber has been applied to modify the interface b…
View article: Side Effects of Gamifying Environmental Education Activities in Chinese Kindergartens
Side Effects of Gamifying Environmental Education Activities in Chinese Kindergartens Open
Environmental education is an effective approach to addressing environmental issues, and incorporating environmental education into kindergarten through gamified activities aligns with the concept of gamifying teaching and provides the opt…
View article: AKT1 as a Therapeutic Target for Platinum-Resistant SOX2 Positive Ovarian Cancer Cells
AKT1 as a Therapeutic Target for Platinum-Resistant SOX2 Positive Ovarian Cancer Cells Open
View article: Porosity Variation and Container Geometry Influence Pcm-Metal Foam Composite Thermal Performance in Lhtes Units
Porosity Variation and Container Geometry Influence Pcm-Metal Foam Composite Thermal Performance in Lhtes Units Open
View article: Cross-Border Electricity Interconnection between China and the Neighboring Countries Under 'the Belt and Road'
Cross-Border Electricity Interconnection between China and the Neighboring Countries Under 'the Belt and Road' Open
View article: Manufacturer’s Green Financing and CER Decisions under the Carbon Tax Policy and Capital Constraints
Manufacturer’s Green Financing and CER Decisions under the Carbon Tax Policy and Capital Constraints Open
This study constructs a two-echelon low-carbon supply chain consisting of a single manufacturer and a retailer. The manufacturer’s initial capital is zero. The study analyzes three financing modes of the manufacturer by using the Stackelbe…
View article: Artificial intelligence is the magic wand making customer-centric a reality! An investigation into the relationship between consumer purchase intention and consumer engagement through affective attachment
Artificial intelligence is the magic wand making customer-centric a reality! An investigation into the relationship between consumer purchase intention and consumer engagement through affective attachment Open
Artificial intelligence (AI) is revolutionizing consumer–provider interactions by changing the nature of online purchases. This study uses the social support theory to investigate consumer purchase intentions by combining AI technology, co…
View article: Aerosol deposition technology and its applications in batteries
Aerosol deposition technology and its applications in batteries Open
Aerosol deposition (AD) method is a kind of additive manufacturing technology for fabricating dense films such as metals and ceramics at room temperature. It resolves the challenge of integrating ceramic films onto temperature-sensitive su…
View article: The Impact of Personal Learning Environments on Chinese Junior High School Students' Spoken English Narrative Competence
The Impact of Personal Learning Environments on Chinese Junior High School Students' Spoken English Narrative Competence Open
This study designed and implemented a personal learning environment platform for spoken English teaching in a junior high school in China to improve students' spoken English narrative competence. Altogether, 83 junior high school year one …
View article: ICT Framework for the Personal Learning Environment (PLE-ICT) in Higher Education: Results from Experts’ Interview
ICT Framework for the Personal Learning Environment (PLE-ICT) in Higher Education: Results from Experts’ Interview Open
The incorporation of Information and Communication Technology (ICT) into higher education has profoundly revolutionized the manner in which students engage with educational resources and acquire knowledge. Personal Learning Environments (P…
View article: Evaluation of monochromatic excitation X-ray fluorescence spectrometry for rapid thallium detection in biological samples using animal models
Evaluation of monochromatic excitation X-ray fluorescence spectrometry for rapid thallium detection in biological samples using animal models Open
Monochromatic excitation X-ray fluorescence (ME-XRF) spectrometry is a novel technique for trace element analysis, characterized by its simplicity, rapidity, and low cost. The objective of this study was to evaluate the applicability of ME…
View article: A New Coated Proppant for Packing Fractures in Oil Reservoirs
A New Coated Proppant for Packing Fractures in Oil Reservoirs Open
The method of packing conventional proppant into fractures is used to maintain high liquid permeability. In this study, by coating a hydrophobic material on the surface of a proppant, the layer packed with this coated proppant was endowed …
View article: Corrigendum: Study on prevention and control mechanism of runoff water hazard in thick coal seam mining in valley terrain
Corrigendum: Study on prevention and control mechanism of runoff water hazard in thick coal seam mining in valley terrain Open
CORRECTION article Front. Earth Sci., 09 May 2023Sec. Environmental Informatics and Remote Sensing Volume 11 - 2023 | https://doi.org/10.3389/feart.2023.1211398
View article: Encapsulation for Sensing Element and Its Application in Asphalt Road Monitoring
Encapsulation for Sensing Element and Its Application in Asphalt Road Monitoring Open
The internal pavement structure is a “black box”; an accurate strain response for the pavement interlayer structure under vehicle load is hard to obtain by conventional road surface detection methods. This is due to the true strain field o…
View article: Characteristics of air quality changes in Quanzhou during the COVID-19 epidemic
Characteristics of air quality changes in Quanzhou during the COVID-19 epidemic Open
On January 8, 2020, there was an outbreak of coronavirus disease 19 (COVID-2019), and on January 24, 2020, Fujian Province issued the "Fujian Provincial Emergency Plan for Public Health Emergencies", which restricted crowd gathering activi…
View article: Surface Modification Strategies for an Improved Interfacial Compatibility between Llzo and a Polymer Substrate for Applications in High-Performance Solid-State Li-Metal Batteries
Surface Modification Strategies for an Improved Interfacial Compatibility between Llzo and a Polymer Substrate for Applications in High-Performance Solid-State Li-Metal Batteries Open
View article: Geochemical Distribution of Soil Metals: A Case Study in Binzhou
Geochemical Distribution of Soil Metals: A Case Study in Binzhou Open
In order to determine the geochemical distribution of metals in the survey area, we investigated and analyzed soil samples according to the regulations of land quality and soil contamination. We analyzed the geochemical properties of the s…