Xiaozheng Chen
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View article: Rainbow Triangles Sharing One Common Vertex or Edge
Rainbow Triangles Sharing One Common Vertex or Edge Open
Let $G$ be an edge-colored graph on $n$ vertices. For a vertex $v$, the color degree of $v$ in $G$, denoted by $d^c(v)$, is the number of colors appearing on the edges incident with $v$. Denote by $\delta^c(G)=\min\{d^c(v):v\in V(G)\}$. By…
View article: Feasibility Analysis of Optimization Models for Natural Gas Distribution Networks Using Machine Learning
Feasibility Analysis of Optimization Models for Natural Gas Distribution Networks Using Machine Learning Open
As natural gas pipeline networks expand, the complexity of pipeline scheduling models increases, making feasibility analysis increasingly difficult. This study focuses on the feasibility analysis of optimization models for natural gas dist…
View article: Deep learning-based prediction of particle size distributions in construction and demolition waste recycling using convolutional neural networks on 3D laser triangulation data
Deep learning-based prediction of particle size distributions in construction and demolition waste recycling using convolutional neural networks on 3D laser triangulation data Open
View article: Mercury distribution and transfer in mangrove forests in urban areas under simulated rising sea levels
Mercury distribution and transfer in mangrove forests in urban areas under simulated rising sea levels Open
This study assesses the impact of simulated sea level rise (SLR) on mercury distribution and migration in an urban mangrove wetland on the northern coast of Maluan Bay, Xiamen City, Fujian Province, China. Two adjacent Kandelia obovata man…
View article: Developing a prediction model in a lightweight packaging waste sorting plant using sensor-based sorting data combined with data of external near-infrared and LiDAR sensors
Developing a prediction model in a lightweight packaging waste sorting plant using sensor-based sorting data combined with data of external near-infrared and LiDAR sensors Open
Sensor-based material flow monitoring allows for continuously high output qualities, through quality management and process control. The implementation in the waste management sector, however, is inhibited by the heterogeneity of waste and…
View article: Feasibility investigation of using waste laminated packaging as bitumen performance enhancer
Feasibility investigation of using waste laminated packaging as bitumen performance enhancer Open
Millions of tons of laminated packaging are extensively utilized in aseptic food packaging due to its advantages in transporting and storing liquid foods, leading to the annual generation of waste laminated packaging (WLP). To address this…
View article: Near-infrared-based quality control of plastic pre-concentrates in lightweight-packaging waste sorting plants
Near-infrared-based quality control of plastic pre-concentrates in lightweight-packaging waste sorting plants Open
Today's post-consumer plastic recycling is limited by labor-intensive manual quality control (MQC) procedures, resulting in largely unknown pre-concentrate purities. Sensor-based quality control (SBQC) could enable an automated inline qual…
View article: Short rainbow cycles in edge-colored graphs
Short rainbow cycles in edge-colored graphs Open
A famous conjecture of Caccetta and Häggkvist (CHC) states that a directed graph $D$ with $n$ vertices and minimum outdegree at least $r$ has a directed cycle of length at most $\lceil \frac{n}{r}\rceil$. In 2017, Aharoni proposed the foll…
View article: Towards digital twins of waste sorting plants: Developing data-driven process models of industrial-scale sensor-based sorting units by combining machine learning with near-infrared-based process monitoring
Towards digital twins of waste sorting plants: Developing data-driven process models of industrial-scale sensor-based sorting units by combining machine learning with near-infrared-based process monitoring Open
Sorting plants are crucial for effective recycling, but their optimization can be challenging due to the heterogeneity of waste streams. We introduce a novel approach to holistically optimize sorting plants using digital twins containing d…
View article: NIR-MFCO dataset: Near-infrared-based false-color images of post-consumer plastics at different material flow compositions and material flow presentations
NIR-MFCO dataset: Near-infrared-based false-color images of post-consumer plastics at different material flow compositions and material flow presentations Open
View article: Improving drum sieve performance in lightweight packaging waste recycling by automatic parameter adjustment through 3D laser triangulation-based process monitoring
Improving drum sieve performance in lightweight packaging waste recycling by automatic parameter adjustment through 3D laser triangulation-based process monitoring Open
Current lightweight packaging (LWP) sorting plants are underperforming, and one of the most important reasons is the fluctuation in LWP input materials. Drum sieving is an essential process in LWP waste processing and recycling, as it is o…
View article: NIR-MFCO dataset: Near-infrared-based false-color images of post-consumer plastics at different material flow compositions and material flow presentations
NIR-MFCO dataset: Near-infrared-based false-color images of post-consumer plastics at different material flow compositions and material flow presentations Open
Determining mass-based material flow compositions (MFCOs) is crucial for assessing and optimizing the recycling of post-consumer plastics. Currently, MFCOs in plastic recycling are mostly determined through manual sorting analysis, but the…
View article: NIR-MFCO dataset: Near-infrared-based false-color images of post-consumer plastics at different material flow compositions and material flow presentations
NIR-MFCO dataset: Near-infrared-based false-color images of post-consumer plastics at different material flow compositions and material flow presentations Open
Determining mass-based material flow compositions (MFCOs) is crucial for assessing and optimizing the recycling of post-consumer plastics. Currently, MFCOs in plastic recycling are mostly determined through manual sorting analysis, but the…
View article: Near-infrared-based determination of mass-based material flow compositions in mechanical recycling of post-consumer plastics: Technical feasibility enables novel applications
Near-infrared-based determination of mass-based material flow compositions in mechanical recycling of post-consumer plastics: Technical feasibility enables novel applications Open
Mass-based material flow compositions (MFCOs) are crucial to assess and optimize mechanical plastic recycling processes. While MFCOs are determined by manual sorting analysis today, in the future MFCOs could be determined inline through ne…
View article: Rainbow triangles sharing one common vertex or edge
Rainbow triangles sharing one common vertex or edge Open
Let $G$ be an edge-colored graph on $n$ vertices. For a vertex $v$, the \emph{color degree} of $v$ in $G$, denoted by $d^c(v)$, is the number of colors appearing on the edges incident with $v$. Denote by $δ^c(G)=\min\{d^c(v):v\in V(G)\}$. …
View article: Integrated Optimization of Crude Oil Procurement Planning and Blending Scheduling for Blended Crude Oil Property Stabilization
Integrated Optimization of Crude Oil Procurement Planning and Blending Scheduling for Blended Crude Oil Property Stabilization Open
View article: Near-infrared-based determination of mass-based material flow compositions in mechanical recycling of post-consumer plastics: Technical feasibility enables novel applications
Near-infrared-based determination of mass-based material flow compositions in mechanical recycling of post-consumer plastics: Technical feasibility enables novel applications Open
Mass-based material flow compositions (MFCOs) are crucial to assess and optimize mechanical plastic recycling processes. While MFCOs are determined by manual sorting analysis today, in the future MFCOs could be determined inline through ne…
View article: Enabling mechanical recycling of plastic bottles with shrink sleeves through near-infrared spectroscopy and machine learning algorithms
Enabling mechanical recycling of plastic bottles with shrink sleeves through near-infrared spectroscopy and machine learning algorithms Open
Shrink sleeves interfere with the mechanical recycling of plastic bottles because of their poor sortability during near-infrared (NIR)-based sorting. This study aims to identify reasons for their poor sortability and to propose solutions t…
View article: Optical sensors and machine learning algorithms in sensor-based material flow characterization for mechanical recycling processes: A systematic literature review
Optical sensors and machine learning algorithms in sensor-based material flow characterization for mechanical recycling processes: A systematic literature review Open
Digital technologies hold enormous potential for improving the performance of future-generation sorting and processing plants; however, this potential remains largely untapped. Improved sensor-based material flow characterization (SBMC) me…
View article: Influences of bioplastic polylactic acid on near-infrared-based sorting of conventional plastic
Influences of bioplastic polylactic acid on near-infrared-based sorting of conventional plastic Open
Bioplastics are developed to replace oil-derived plastics due to the high consumption of oil and related environmental impacts of oil-derived plastics. It was predicted that bioplastics can potentially replace 94% of conventional plastic p…
View article: Author response for "Grid mapping revealed hidden geochemical lens and its chemostratigraphic bias in the middle‐upper Permian marine carbonate sequence in Laibin, South China"
Author response for "Grid mapping revealed hidden geochemical lens and its chemostratigraphic bias in the middle‐upper Permian marine carbonate sequence in Laibin, South China" Open
Get your research seenMake an impact with these nine promotional tools. SEO• Use relevant keywords to make your title and abstract clear and easy to search for.• Off-page SEO strategies, like link building, can help get your paper seen. Co…
View article: Rainbow triangles in edge-colored complete graphs
Rainbow triangles in edge-colored complete graphs Open
Let $G$ be a graph of order $n$ with an edge-coloring $c$, and let $δ^c(G)$ denote the minimum color-degree of $G$. A subgraph $F$ of $G$ is called rainbow if any two edges of $F$ have distinct colors. There have been a lot results in the …
View article: Note on rainbow cycles in edge-colored graphs
Note on rainbow cycles in edge-colored graphs Open
Let $G$ be a graph of order $n$ with an edge-coloring $c$, and let $δ^c(G)$ denote the minimum color degree of $G$. A subgraph $F$ of $G$ is called rainbow if all edges of $F$ have pairwise distinct colors. There have been a lot results on…
View article: Determination of the composition of multilayer plastic packaging with NIR spectroscopy
Determination of the composition of multilayer plastic packaging with NIR spectroscopy Open
In food and medical packaging, multiple layers of different polymers are combined in order to achieve optimal functional properties for various applications. Flexible multilayer plastic packaging achieves a reduction in weight compared to …
View article: Proper vertex-pancyclicity of edge-colored complete graphs without joint monochromatic triangles
Proper vertex-pancyclicity of edge-colored complete graphs without joint monochromatic triangles Open
In an edge-colored graph $(G,c)$, let $d^c(v)$ denote the number of colors on the edges incident with a vertex $v$ of $G$ and $δ^c(G)$ denote the minimum value of $d^c(v)$ over all vertices $v\in V(G)$. A cycle of $(G,c)$ is called proper …
View article: Optimized Segmentation Based on the Weighted Aggregation Method for Loess Bank Gully Mapping
Optimized Segmentation Based on the Weighted Aggregation Method for Loess Bank Gully Mapping Open
The Chinese Loess Plateau suffers severe gully erosion. Gully mapping is a fundamental task for gully erosion monitoring in this region. Among the different gully types in the Loess Plateau, the bank gully is usually regarded as the most i…
View article: INFLUENCES AND CONSEQUENCES OF MECHANICAL DELABELLING ON PET RECYCLING
INFLUENCES AND CONSEQUENCES OF MECHANICAL DELABELLING ON PET RECYCLING Open
The recycling of polyethylene terephthalate (PET) is an important issue of today's society. Mechanical recycling makes more sense from an ecological point of view than chemical PET recycling. However, mechanical recycling still is highly s…