Chengrong Li
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View article: Novel Hybrid Algorithm of Cooperative Evolutionary Algorithm and Constraint Programming for Dual Resource Constrained Flexible Job Shop Scheduling Problems
Novel Hybrid Algorithm of Cooperative Evolutionary Algorithm and Constraint Programming for Dual Resource Constrained Flexible Job Shop Scheduling Problems Open
In real production, machines are operated by workers, and the constraints of worker flexibility should be considered. The flexible job shop scheduling problem with both machine and worker resources (DRCFJSP) has become a research hotspot i…
View article: Development of Highly Stable Ac/Sps Composite Materials for the Removal of Reactive Red Dye Across a Wide Ph Range
Development of Highly Stable Ac/Sps Composite Materials for the Removal of Reactive Red Dye Across a Wide Ph Range Open
View article: Two Novel Synergistic Systems For Efficient Depassivation in Micro-Electrolysis: Design and Mechanism
Two Novel Synergistic Systems For Efficient Depassivation in Micro-Electrolysis: Design and Mechanism Open
View article: Performance and Mechanism of Enhanced Nitrogen Removal by Fe/Cu/C Micro-Electrolysis Coupled with Salt-Tolerant Microorganisms in Saline-Alkali Constructed Wetlands
Performance and Mechanism of Enhanced Nitrogen Removal by Fe/Cu/C Micro-Electrolysis Coupled with Salt-Tolerant Microorganisms in Saline-Alkali Constructed Wetlands Open
View article: DC allowable electric field strength for naphthenic‐based and paraffin‐based transformer oils
DC allowable electric field strength for naphthenic‐based and paraffin‐based transformer oils Open
Currently, the design of transformers insulation predominantly depends on the allowable alternating current (AC) field values for insulating oil established by Weidmann in the 1980s, lacking the research under direct current (DC) voltage f…
View article: Photodetector array for measuring the spatial–temporal distribution characteristics of electric field in oil–pressboard insulation based on the Kerr electro‐optic effect
Photodetector array for measuring the spatial–temporal distribution characteristics of electric field in oil–pressboard insulation based on the Kerr electro‐optic effect Open
Accurate measurement and effective analysis of the space electric field and charge characteristics within the oil–pressboard insulation structure of converter transformer are essential for achieving precise insulation structure design. Pre…
View article: Influencing factors and uncertainty analysis for Kerr electro-optic effect based electric field measurements in transformer oil under impulse voltage
Influencing factors and uncertainty analysis for Kerr electro-optic effect based electric field measurements in transformer oil under impulse voltage Open
The design of insulating structures for transformers under impulse voltage relies predominantly on simulation software due to the absence of experimental validation. This underscores the pressing need for comprehensive research into the sp…
View article: Influence mechanisms of epoxy degradation on surface traps and charge accumulation under DC electrical–thermal stress
Influence mechanisms of epoxy degradation on surface traps and charge accumulation under DC electrical–thermal stress Open
As trapping sites for surface charges, the surface trap is an important factor affecting the insulation performance of the epoxy–SF 6 interface, which is closely related to the microstructure and its evolution. However, existing studies of…
View article: The Response of Rocky Desertification to the Development of Road Networks in Karst Ecologically Fragile Areas
The Response of Rocky Desertification to the Development of Road Networks in Karst Ecologically Fragile Areas Open
Frequent cross-regional communication makes road networks increasingly dense and has generated prominent human interference, thus resulting in the destruction of the landscape’s integrity and leading to changes in the functional processes …
View article: Ecological Quality Evolution and Its Driving Factors in Yunnan Karst Rocky Desertification Areas
Ecological Quality Evolution and Its Driving Factors in Yunnan Karst Rocky Desertification Areas Open
Rocky desertification is a key element affecting regional ecological quality. Rocky desertification in Southwest China directly affects the ecological security of the Yangtze River and Pearl River basins and also restricts regional economi…
View article: Residual Life Prediction of XLPE Distribution Cables Based on Time-Temperature Superposition Principle by Non-Destructive BIS Measuring on Site
Residual Life Prediction of XLPE Distribution Cables Based on Time-Temperature Superposition Principle by Non-Destructive BIS Measuring on Site Open
Crosslinked polyethylene (XLPE) distribution cables are prone to segmented thermal aging after long-term operation owing to the large spatial spans and complex operating environments, and accurate residual life prediction of each aging cab…
View article: High-Voltage FDS of Thermally Aged XLPE Cable and Its Correlation with Physicochemical Properties
High-Voltage FDS of Thermally Aged XLPE Cable and Its Correlation with Physicochemical Properties Open
This paper aims to investigate the influence of thermal aging on a crosslinked polyethylene (XLPE) cable, and the relationships between the macroscopical high-voltage dielectric and the microscopical physicochemical properties are also elu…
View article: Modelling on thermal‐fluid field in SF <sub>6</sub> insulated high voltage direct current bushing with its influence on electric field distribution and metal particle motion
Modelling on thermal‐fluid field in SF <sub>6</sub> insulated high voltage direct current bushing with its influence on electric field distribution and metal particle motion Open
The insulation performance of SF 6 insulated high voltage direct current apparatus are often analysed in a pure electric field or electro‐thermal coupled field while the fluid behaviour of SF 6 gas flow is often ignored. However, frequent …
View article: Airport noise disturbs foraging behavior of Japanese pipistrelle bats
Airport noise disturbs foraging behavior of Japanese pipistrelle bats Open
The expansion of anthropogenic noise poses an emerging threat to the survival and reproductive success of various organisms. Previous investigations have focused on the detrimental effects of anthropogenic noise on the foraging behavior in…
View article: Study on the Interference Distribution Characteristics of the HVDC Grounding Electrode Current with Buried Pipelines Based on MoM and FEM
Study on the Interference Distribution Characteristics of the HVDC Grounding Electrode Current with Buried Pipelines Based on MoM and FEM Open
It is very important to calculate the interference of high voltage direct current (HVDC) grounding current with pipelines accurately and take proper protective measures to ensure energy transmission safety. There is still a lack of systema…
View article: A simple method considering the synergetic effect of space charge and inhomogeneous material conductivity for DC electric field computation
A simple method considering the synergetic effect of space charge and inhomogeneous material conductivity for DC electric field computation Open
The current continuity equation is usually applied to solve DC electric field distribution when there is inhomogeneous material conductivity due to temperature gradient or multi‐layer dielectrics. However, in the presence of charge accumul…
View article: [Reflections on and Preliminary Practice of Pharmaceutical Curriculum Structure Reform under the Guidance of Coordinated Development Concept].
[Reflections on and Preliminary Practice of Pharmaceutical Curriculum Structure Reform under the Guidance of Coordinated Development Concept]. Open
The structure of pharmaceutical higher education in China needs to be adjusted under the guidance of Xi Jinping's new development philosophy, especially the concept of coordinated development, in order to meet the demands of the campaign t…
View article: Influence of rate of voltage rise on positive leader inception in long-air-gap discharge
Influence of rate of voltage rise on positive leader inception in long-air-gap discharge Open
Positive leader inception under different rates of voltage rise is a key element in physical modeling of dielectric breakdown of long air gaps and evolution of natural lightning. The leader inception phase comes first in long-air-gap disch…
View article: Space-time distribution characteristic of electric field in oil of oil-pressboard insulation structure oil under impulse voltage
Space-time distribution characteristic of electric field in oil of oil-pressboard insulation structure oil under impulse voltage Open
The space electric field distribution in oil under impulse voltage is very important for the design of transformer insulation. The existing research only focused on the characteristics of the electric field at a certain point in oil-pressb…
View article: Effect of DC electric field on moisture migration characteristics in oil‐pressboard
Effect of DC electric field on moisture migration characteristics in oil‐pressboard Open
The moisture content has a great influence on the electric insulation strength of oil‐pressboard. Therefore, it is very important to assess the moisture content in power transformers. There is lack of research about the effect of DC electr…
View article: Effect of Segmented Thermal Aging on Defect Location Accuracy in XLPE Distribution Cables
Effect of Segmented Thermal Aging on Defect Location Accuracy in XLPE Distribution Cables Open
Frequency domain reflectometry (FDR) technologies could be applied to locate defects in cables effectively. Owing to the large space span and complex operating environment of the actual XLPE distribution cables, segmented thermal aging phe…
View article: Optimal Data Selection Rule Mining for Transformer Condition Assessment
Optimal Data Selection Rule Mining for Transformer Condition Assessment Open
The condition of the transformer can be accurately assessed based on dissolved gas online monitoring and analysis technology. With the widespread use of Dissolved Gas Analysis (DGA) technology, a large amount of dissolved gas time series d…
View article: Enhanced voltage distribution and breakdown strength performances of oil‐paper composite insulation by adding TiO <sub>2</sub> nanoparticles
Enhanced voltage distribution and breakdown strength performances of oil‐paper composite insulation by adding TiO <sub>2</sub> nanoparticles Open
Abtsract Oil–paper composite insulation (OPCI) is used as the main insulation material in the converter transformer. However, the dielectric properties of insulating oil and oil‐impregnated paper are markedly mismatched under direct curren…
View article: Optical sensing in condition monitoring of gas insulated apparatus: a review
Optical sensing in condition monitoring of gas insulated apparatus: a review Open
Health monitoring of gas insulated apparatus is critical to improve the reliability and to reduce the life cycle cost. Among the various methods for monitoring, optical sensing developed fast in recent years due to their highly sensitive a…
View article: Key dielectric properties and performance evaluation of high-density pressboard for electrical purposes
Key dielectric properties and performance evaluation of high-density pressboard for electrical purposes Open
A high-density electrical pressboard plays a significant role in maintaining the safe and stable operation of power equipment. In response to concerns about finding an evaluation method based on the dielectric performance of the pressboard…
View article: Research on Creeping Flashover Characteristics of Nanofluid-Impregnated Pressboard Modified Based on Fe3O4 Nanoparticles under Lightning Impulse Voltages
Research on Creeping Flashover Characteristics of Nanofluid-Impregnated Pressboard Modified Based on Fe3O4 Nanoparticles under Lightning Impulse Voltages Open
Creeping flashover of mineral-oil-impregnated pressboard under impulse stress is a common insulating failure in oil-immersed transformers, arousing increasing attention. Recent studies have shown that the breakdown strength of transformer …
View article: Multi-gas detection in power transformer oil based on tunable diode laser absorption spectrum
Multi-gas detection in power transformer oil based on tunable diode laser absorption spectrum Open
Online dissolved gas analysis (DGA) is an effective technique to obtain the health status information of insulation oil in power transformers. The typical hydrocarbon gases (methane, ethyne, ethene, ethane) decomposed from insulation oil, …
View article: Polarization and Trap Characteristics Modification of Oil-Impregnated Paper Insulation by TiO2 Nanoparticles
Polarization and Trap Characteristics Modification of Oil-Impregnated Paper Insulation by TiO2 Nanoparticles Open
Polarization and traps determine the electrical property of oil-paper insulation, but most attention has been paid to the modification of insulating oil with nanoparticles, so there are is little research about oil-impregnated paper, and t…
View article: Flashover behavior of cone-type spacers with inhomogeneous temperature distribution in SF6/N2-filled DC-GIL under lightning impulse with DC voltage superimposed
Flashover behavior of cone-type spacers with inhomogeneous temperature distribution in SF6/N2-filled DC-GIL under lightning impulse with DC voltage superimposed Open
Before designing DC gas insulated transmission lines (GIL), the insulation characteristics of spacers under a lightning impulse (LI) voltage with a superimposed DC voltage must be clarified. Many experiments have been performed to guide th…
View article: Rapid Transformer Health State Recognition Through Canopy Cluster-Merging of Dissolved Gas Data in High-Dimensional Space
Rapid Transformer Health State Recognition Through Canopy Cluster-Merging of Dissolved Gas Data in High-Dimensional Space Open
Dissolved gases in oil are major parameters for assessing the health state of power transformers. Recognizing that the existing state recognition methods are often restrained by data fluctuation and usually require greater computational lo…