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Journal of Hebei University of Science and Technology
ISSN 1008-1542 · Hebei University of Science and Technology · 848 artikel di indeks
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Artikel Jurnal
Calculation and analysis of carbon footprint in the production process of needle-punched geotextiles
To evaluate the carbon emission issue during the production process of needle-punched geotextiles, S factory was taken as the research subject. A carbon footprint model for the production process of needle-punched geotextiles was constructed based on the life cycle assessment (LCA) method to…
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Artikel Jurnal
Hierarchical clustering algorithm based on minimum spanning tree and statistical features
To address the limitations of the Chameleon algorithm in terms of parameter sensitivity, noise robustness, and computational efficiency, this study proposed a statistical-MST integrated hierarchical clustering algorithm(SHCA) based on the minimum spanning tree and statistical features. The minimum…
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Artikel Jurnal
Detection of edible oil adulteration based on laser-induced fluorescence spectroscopy and partial least squares-discriminant analysis
This study proposed a method for identifying adulteration in high-quality edible oils by combining laser-induced fluorescence (LIF) technology with partial least squares-discriminant analysis (PLS-DA), aiming to quickly detect low-quality edible oils in the market. Firstly, a laboratory-built LIF…
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Artikel Jurnal
Research on the control system of a novel sliding mode active disturbance rejection crane motor
In order to enhance the response speed of the permanent magnet synchronous motor(PMSM) in cranes and the robustness of the system, an improved index law was proposed. The new sliding mode control(NSMC) in the speed loop was adopted based on field-oriented control（FOC）. A new function f(s) was…
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Artikel Jurnal
Welded joint type and lack-of-fusion detection based on CA-PnPNet
To address the limited 3D structural perception and insufficient feature discrimination in traditional welding joint classification and lack-of-fusion detection methods, this study proposed a 3D point cloud detection network that integrated geometric structure modeling with an attention mechanism…
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Artikel Jurnal
Improved YOLOv11n based pedestrian detection model in complex scenarios
To address the decline in pedestrian detection accuracy caused by complex scenarios such as illumination variations, viewing angles, background interference and small pedestrian targets, which often lead to false positives and missed detections, a pedestrian detection model, YOLOv11-CREP, was…
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Artikel Jurnal
Effects of Mn3O4 particle size and tap density on the electrochemical performance of LiMn2O4 cathode materials
To address the problem of rapid capacity decay of LiMn2O4 during the cycling process, Mn3O4 with different particle sizes and tap densities was prepared by manganese salt method, and used as a precursor to synthesize LiMn2O4 cathode material. The effects of Mn3O4 particle size and tap density on…
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Artikel Jurnal
Influences of further hydration on properties of high-strength concrete with slag powder
Aiming at the problems of expansion and cracking that may occur in high-strength concrete(HSC) serving in long-term humid or water environments, the influence of further hydration on HSC property was studied by simulation test. Firstly, the influence of slag powder content on the physical and…
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Artikel Jurnal
Effect of normalization process on microstructure and texture of W470 non-oriented silicon steel
To address the issue of significant deformed microstructures and undesirable textures in as-hot-rolled W470 non-oriented silicon steel sheets produced without mold electromagnetic stirring, electron backscattered diffraction(EBSD) was employed to systematically investigate the effects of…
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Artikel Jurnal
Analysis of microstructure and mechanical properties of friction stir welding joints of magnesium-aluminum dissimilar metals
To suppress the formation of brittle magnesium-aluminum intermetallic compounds（IMCs）in the welding joints of magnesium-aluminum dissimilar metals and enhance the joint performance, a friction stir welding (FSW) technique was adopted and copper foil was used as an interlayer metal to weld 7075-T6…
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Artikel Jurnal
Optimization and finite element analysis of the drawing process for rolling linear guide slider
Aiming to address the issue of increased production costs caused by the five-pass cold drawing forming for the sliding block in the rolling linear guide pair in a factory in Hebei Province, this study investigated the influence of parameters such as die cone angle and sizing belt length on billet…
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Artikel Jurnal
Research progress on chemical recycling technology of PET
Chemical recycling provides a key route for the closed-loop circularity and high-value utilization of waste polyethylene terephthalate(PET), which presents inherent degradation challenges. Based on the analysis of the reaction mechanisms and process characteristics of major depolymerization…
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Artikel Jurnal
Research on traffic cone recognition and localization method based on YOLOv5 and RGB-D fusion
To meet the requirements of real-time traffic cone detection and three-dimensional localization in construction and testing scenarios involving traffic cones, and to alleviate false positives and missed detections under complex illumination and occlusion conditions, this paper proposed a traffic…
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Artikel Jurnal
Perturbation control of double inverted pendulum based on adjoint function energy optimization
To address the performance degradation of a double linear inverted pendulum under simultaneous parameter perturbations and external disturbances, an energy-optimization-based composite control strategy was proposed. The dynamic model was firstly established using the Lagrange method. Then, the LQR…
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Artikel Jurnal
Optimization of organic acid production by Bacillus megaterium fermentation
To improve the organic acid yield and substrate conversion efficiency in the fed-batch fermentation system of Bacillus megaterium, this study optimized the medium components and fermentation process control conditions using shake flasks and a 5 L bioreactor. An oxygen supply control strategy was…
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Artikel Jurnal
Scale-up preparation and ethanol adsorption process of MIL-100(Fe) composite adsorbent
To solve the problem of excessive ethanol emissions from the fermentation off-gas in fuel ethanol production, a spherical composite adsorbent MIL-100 (Fe) @PAA-TEPA was scaled up from the milligram to kilogram level by optimizing the preparation process under normal temperature and pressure, which…
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Artikel Jurnal
Preparation of porous polyacrylonitrile-based photocatalysts and hydrogen production from water splitting
To address the limitations of traditional polyacrylonitrile（PAN）-based photocatalysts, particularly their low specific surface area and the high recombination rate of photogenerated charge carriers that adversely affect photocatalytic activity, PAN was synthesized by combining a template method…
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Artikel Jurnal
Oxygen evolution reaction performance of FeNiCoMoPCB high-entropy amorphous alloy
To address the insufficient stability of amorphous alloys during long-term oxygen evolution reaction(OER) processes, this study integrated the compositional design concept of high-entropy alloys into the material development of conventional amorphous alloys to enhance their catalytic durability. By…
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Artikel Jurnal
Dynamic response analysis of permeable asphalt pavement under random vehicle loads
To investigate the coupled dynamic responses of the permeable asphalt pavement system under random vehicle loads, an analytical solution method based on the superposition principle was proposed. Firstly, a random vehicle load was obtained based on a 1/4 vehicle model under pavement roughness…
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Artikel Jurnal
Synthesis and characterization of silk fibroin/hyaluronic acid injectable hydrogel without external crosslinking agents
In view of the problem that the current hydrogel materials need to rely on chemical crosslinking agents to make up for their insufficient mechanical properties in the biomedical field, silk fibroin(SF) and hyaluronic acid were modified to construct a material system that can form hydrogels without…