Article
Engineering, Chemical
Pengyu Sun, Lixia Zhao, Qian Ma, Wei Zhang, Shun Zhang, Xiao Li, Juan Wen, Luxing Dou, Zhigang Wen
Summary: This study describes the characteristics and distribution of subsurface shale oil reservoirs in the deep lake deposits of the Chang 7 member, Yanchang Formation, Ordos Basin in China. The study also provides an interpretation of the sedimentary features of hyperpycnal flow deposits. The findings have important implications for hydrocarbon reservoir exploration.
Article
Geosciences, Multidisciplinary
Xing Tian, Yuan Gao, Zhiyang Li, Zavala Carlos, Zongyang Chen, Yongjian Huang, Enxiao Yu, Chengshan Wang
Summary: The study of lithofacies and mudstone deposition environment in the Songliao Basin in NE China reveals a depositional model influenced by muddy hyperpycnal flows and debris flows, providing new insights into lacustrine paleoenvironment and terrestrial paleoclimate.
GEOLOGICAL JOURNAL
(2021)
Article
Geochemistry & Geophysics
Isabelle Panet, Marianne Greff-Lefftz, Barbara Romanowicz
Summary: Understanding mantle flow is crucial for understanding the connection between deep Earth dynamics and global tectonics. This study analyzes derivatives of seafloor topography and gravity potential over the Pacific and Northern Indian ocean basins, revealing periodic undulations and identifying alignments with sub-lithospheric upper mantle mass excess and slow seismic velocity fingers. This suggests an intermediate scale of mantle convection below ocean basins, driven by lateral variations in composition. Further research is needed to investigate the nature of these mass excess sources and their relationship with slow seismic velocities.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geology
Sten-Andreas Grundvag, William Helland-Hansen, Erik P. Johannessen, Joris Eggenhuisen, Florian Pohl, Yvonne Spychala
Summary: This study presents sedimentological evidence of sandy hyperpycnal flow deposits (hyperpycnites) in a series of basin floor lobe complexes associated with a progradational shelf margin in the Eocene of Spitsbergen, Arctic Norway. The abundance of thick-bedded massive sandstones, frequent bed amalgamation, and the distribution of hyperpycnites across the lobes suggest that hyperpycnal flow was the most important mechanism driving lobe progradation. These findings challenge the traditional beliefs about hyperpycnites preserving the waxing-waning signal of single-peaked floods.
Article
Geosciences, Multidisciplinary
Yun Peng, Qian Yu, Zhiyun Du, Li Wang, Yunwei Wang, Shu Gao
Summary: Wave and/or current supported gravity-driven sediment flows play a significant role in morphological evolution in many regions worldwide. However, their episodic and ephemeral nature makes it challenging to document them in detail. This study provides solid evidence of frequent generation of such flows over the shallow sea floor of a muddy open coast.
Article
Geosciences, Multidisciplinary
James M. DeGraff, Brad T. Carter
Summary: The Keweenaw fault system in Michigan, USA is an important fault system associated with the Midcontinent Rift System. It was initially thought to be the result of inversion of a rift-bounding normal fault, but recent research indicates that it is a reverse, listric system detached deep within the volcanic section. The fault extends from onshore to offshore and the depth of detachment is estimated to be 12-15 km.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2023)
Article
Geology
James Bishop, Steve Bachtel, Jesse Thompson, Cody Miller, Brooks Ryan, Morgan Sullivan, Zane Jobe
Summary: Deep-water carbonate deposition is a complex and important topic of research in academia and industry. Recent studies have revealed the diversity of depositional processes and sediment types, but there is still a lack of well-documented outcrops of ancient systems. The Tierra Blanca and Dona Ana members of the Mississippian Lake Valley Formation offer exceptional exposures for studying the architecture, rock types, and sedimentary processes of submarine fan deposits. These outcrops provide insights into the similarities and differences between carbonate and siliciclastic gravity flow deposits.
DEPOSITIONAL RECORD
(2023)
Article
Geosciences, Multidisciplinary
Daniel Mueller, Karl Kwan, David I. Groves
Summary: Geophysical exploration for concealed orogenic gold deposits is challenging due to subtle petrophysical contrasts between the gold lodes and their host rocks. This study demonstrates the effectiveness of airborne Induced Polarization (AIP) Cole-Cole parameters, obtained from helicopter time-domain electromagnetic (HTEM) surveys, in detecting concealed gold deposits in the Kabinakagami Lake greenstone belt in Canada. The integration of AIP, resistivity-scaled chargeability (RSC), EM induction time-constant, and magnetic data using Deep Neural Network (DNN) predictive targeting analysis helps identify exploration targets and vectoring tools for drill targets during exploration for concealed gold deposits.
JOURNAL OF APPLIED GEOPHYSICS
(2022)
Article
Geosciences, Multidisciplinary
Jagabir Ningthoujam, R. W. C. (Bill) Arnott, Curran Wearmouth
Summary: This paragraph discusses the formation mechanisms of two types of sedimentary rock layers, namely a sand-rich basal part and a mud-rich upper part. This composition is termed "linked debrites" and plays an important role in deposition processes in specific geological regions.
Article
Geosciences, Multidisciplinary
Jagabir Ningthoujam, R. W. C. (Bill) Arnott, Curran Wearmouth
Summary: This study focuses on the characteristics and formation mechanism of bipartite facies found in the Neoproterozoic Windermere Supergroup and the Ordovician Cloridorme Formation. It suggests that these facies are high-energy, mud-enriched avulsion jets formed in a rapidly evolving, negligibly sheared sand mud suspension along the margins and downflow terminus. The study also explains the spatial and temporal regularity and suggests that it is caused by the deposition of traction structured sandstone overlain by mudstone cap.
Article
Geosciences, Multidisciplinary
Asbjorn Rune Aa, Stein Bondevik, Eivind Sonstegaard
Summary: In this study, the authors reconstruct the Holocene history of debris flows and snow avalanches by investigating surface deposits and sediment cores in western Norway. The results show that there has been continuous debris flow and snow avalanche activity in the region throughout the past 10,000 years, with a possible increase in snow avalanche activity in the last 5,000 years.
NORWEGIAN JOURNAL OF GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Asbjorn Rune Aa, Stein Bondevik, Eivind Sonstegaard
Summary: By investigating outcrops in colluvial fans surrounding lake Anestolsvatnet in western Norway and sediment cores penetrating the lake-floor deposits, the Holocene history of debris flows and snow avalanches has been reconstructed. The study found almost continuous snow-avalanche activity and debris-flow activity throughout the last 10,000 years, with a possible increase in snow-avalanche activity over the last 5000 years.
NORWEGIAN JOURNAL OF GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Asbjorn Rune Aa, Stein Bondevik, Eivind Sonstegaardl
Summary: This study reconstructs the Holocene history of debris flows and snow avalanches in western Norway through the investigation of lake outcrops and sediment cores. The findings suggest that there has been almost continuous activity of debris flows and snow avalanches throughout the last 10,000 years, with a possible increase in snow avalanche activity over the last 5000 years.
NORWEGIAN JOURNAL OF GEOLOGY
(2022)
Article
Operations Research & Management Science
Xin Guan, Tom Servranckx, Mario Vanhoucke
Summary: Budget allocation in project risk response is crucial for reasonable utilization of project budgets and effective risk mitigation. This paper proposes an integrated method based on optimization model and fault tree analysis. It includes three steps: analyzing risk probabilities and losses, establishing the relationship between budget and response effects, and constructing an optimization model to minimize total risk cost. The paper provides proofs for optimal risk response strategy and a computational experiment to support the proposed method.
ANNALS OF OPERATIONS RESEARCH
(2023)
Review
Plant Sciences
Denise L. Lindsay, Joanna Freeland, Ping Gong, Xin Guan, Nathan E. Harms, Kurt P. Kowalski, Richard F. Lance, Dong-Ha Oh, Bradley T. Sartain, Douglas L. Wendell
Summary: Phragmites australis subsp. australis is an invasive and ecologically detrimental plant in North America. Differentiating between subspecies or haplotypes is necessary for targeted management of the invader. This review discusses current genetic discrimination methods, control tools, and implications for implementation, highlighting the need for faster and more accurate differentiation among native and introduced subspecies.
Article
Multidisciplinary Sciences
Tze-Gang Hsu, Shiqi Liu, Xin Guan, Seiyoung Yoon, Junfeng Zhou, Wei-Yuan Chen, Sanjay Gaire, Joshua Seylar, Hanlin Chen, Zeyu Wang, Jared Rivera, Leyao Wu, Christopher J. Ziegler, Ruel McKenzie, Junpeng Wang
Summary: To address the challenges of demanding synthetic conditions and poor stability of low ceiling temperature (Tc) polymers, the authors propose developing high-Tc polymers that can be converted into low-Tc polymers on demand. They demonstrate the mechanochemical generation of 2,5-dihydrofuran polymer (PDHF), which is otherwise difficult to synthesize, highlighting the power of polymer mechanochemistry. This concept can be applied to develop next-generation sustainable plastics.
NATURE COMMUNICATIONS
(2023)
Review
Medicine, Research & Experimental
Michael King Yung Chung, Lanqi Gong, Dora Lai-Wan Kwong, Victor Ho-Fun Lee, Ann Wing-Mui Lee, Xin-Yuan Guan, Ngar-Woon Kam, Wei Dai
Summary: Most mature B cells can be classified into four subtypes based on surface markers IgD and CD27. DN B cells, although present in small numbers, are crucial in various diseases, playing different roles depending on the disease. Further understanding of the mechanisms underlying DN B cell involvement in these diseases is essential for therapeutic strategies.
EMBO MOLECULAR MEDICINE
(2023)
Article
Physics, Multidisciplinary
Xin Guan, Huan Shen, Charles Okanda Nyatega, Qiang Li
Summary: Recently, convolutional neural networks have made significant advancements in hand pose estimation from RGB images. However, accurately inferring occluded keypoints remains challenging. To address this, we propose a new network that leverages contextual information and relationships between different levels of features to learn rich representations of keypoints. Our network, consisting of GlobalNet and RegionalNet, uses a feature pyramid structure to roughly locate hand joints and a four-stage cross-scale feature fusion network to refine keypoint representation learning. Experimental results demonstrate that our method outperforms state-of-the-art approaches on two public datasets, STB and RHD.
Article
Public, Environmental & Occupational Health
Yilin Tian, Xiuqing Cui, Xin Guan, Xiang Meng, Min Zheng, Xin Wang, Guoping Cheng, Ying Xia, Meng Ye
Summary: This study aimed to profile the microRNA (miRNA) expression in lung tissues of coal workers' pneumoconiosis (CWP) and silicosis patients and analyze their downstream genes, biological processes, and signaling pathways. miRNA profiles were obtained using Affymetrix GeneChip miRNA Arrays in lung tissues from 3 CWP patients, 8 silicosis patients, and 4 healthy controls. Differentially expressed miRNAs (DEMs) were identified and their putative target genes were predicted using miRanda and TargetScan databases. The GO and KEGG pathway analyses revealed enrichment of target genes in TGF-beta, MAPK, and p53 signaling pathways. These findings shed light on the underlying mechanisms of CWP and silicosis and provide insights into miRNAs as potential biomarkers for diagnosis and differential diagnosis of these diseases.
TOXICOLOGY AND INDUSTRIAL HEALTH
(2023)
Article
Chemistry, Multidisciplinary
Difei Zhao, Jiaming Zhang, Xin Guan, Dandan Liu, Qinxia Wang, Weiwei Jiao, Xueqing Zhou, Yingjie Li, Geoff Wang, Yinghai Guo
Summary: Coal-bearing strata in the Transitional Upper Carboniferous Shanxi Formation in the Qinshui Basin have been proven to be mixed unconventional gas-bearing reservoirs forming a multi-superimposed gas system. The pore networks in high-rank coal, shale, and tight sandstone reservoirs from the Shanxi Formation were compared using different experimental methods. The results showed significant genetic and structural differences in pore types, morphology, abundance, and proportion, reflecting strong heterogeneity characteristics. Coal and tight sandstone reservoirs provide important spaces for adsorbed and free gas, while continuously developed shales of a specific thickness often divide the superimposed gas-bearing system.
APPLIED SCIENCES-BASEL
(2023)
Article
Construction & Building Technology
Jingcai Zhang, Yong Ding, Xinchun Guan, Jinping Ou
Summary: A new prefabricated seismic isolation system called FPB-CFST was proposed to enhance the mechanical performance and speed up the construction process of the isolation layer. Unlike traditional FPB-Pier systems, the CFST was used as the main support structure, with a spherical curvature surface (SCS) attached to allow sliding of the superstructure. A construction procedure for the FPB-CFST was proposed and various FPB-CFST specimens with different SCS radii were fabricated. Experimental investigations were conducted on the axial local compressive and compressive shear behaviors of the FPB-CFST. Friction coefficient tests and evaluations on the effects of sliding velocity and equivalent pressure were also performed.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Communication
Guoquan Ye, Xin Guan, Liselot Hudders
Summary: This study used eye-tracking technology to examine the effects of television program-induced moods (sad vs. neutral vs. happy) on viewers' attitudinal responses to brand placement and the moderating role of advertising disclosure. The results showed that program-induced moods had different effects on brand attitude depending on whether there was an advertising disclosure or not. Moreover, viewers' attention allocation and activation of persuasion knowledge played a significant mediating role only when there was an advertising disclosure.
CHINESE JOURNAL OF COMMUNICATION
(2023)
Article
Soil Science
Kaiyan Zhai, Pan Yin, Daniel Revillini, Shengen Liu, Qingpeng Yang, Longchi Chen, Munan Zhu, Xin Guan, Zhangquan Zeng, Huixia Yang, Qingkui Wang, Silong Wang, Weidong Zhang
Summary: Through studying the changes in soil microbial communities and plant traits in a Chinese fir plantation, it was found that non-planted woody plant communities have a close relationship with soil bacterial and fungal diversity. The results showed that soil bacterial richness was positively associated with woody plant richness, while soil fungal richness was negatively associated with woody plant basal area. Furthermore, woody plant richness was positively correlated with ectomycorrhizal fungal richness but negatively correlated with the richness of pathogenic and saprotrophic fungi. The study highlights the importance of community-level woody plant attributes in regulating microbial biodiversity in plantation systems.
APPLIED SOIL ECOLOGY
(2023)
Article
Soil Science
Renshan Li, Yu Wang, Congying Yuan, Weidong Zhang, Qingkui Wang, Xin Guan, Longchi Chen, Silong Wang, Jianming Han, Qingpeng Yang
Summary: The effects of leaf economic spectrum (LES) and nutrient resorption on litter decomposition temperature sensitivity (Q(10)) were investigated in 15 subtropical woody species. The results showed that Q(10) values were correlated with LES, with resource-conservative species having higher Q(10) values. Leaf nitrogen concentration, C:N ratio, and lignin:N ratio were correlated with Q(10), while leaf phosphorus and lignin concentrations, specific leaf area, and C:P ratio showed no relationships. Also, there was no correlation between LES and species-specific nitrogen and phosphorus resorption efficiency (NRE and PRE) with Q(10). These findings suggest an association between plant functional features and forest carbon dynamics in a warmer future.
BIOLOGY AND FERTILITY OF SOILS
(2023)
Article
Chemistry, Multidisciplinary
Xin Guan, Guangyao Cheng, Yi-Ping Ho, Bernard P. P. Binks, To Ngai
Summary: In the past decades, various stimuli-responsive materials have been developed for droplet manipulation, with light being a flexible option for contactless control in three-dimensional space. This study presents a synthesis of plasmonic hybrid microgels through electrostatic heterocoagulation, which are effective stabilizers of oil-in-water Pickering emulsions. Laser irradiation on Au nanoparticles induces a cascade effect to thermally responsive microgels, causing microgel desorption and emulsion destabilization. The localized heating from a focused laser leads to the formation of air-in-oil-in-water emulsions, capable of mimicking natural microswimmers and achieving on-demand droplet merging and chemical communication.
Article
Plant Sciences
Weihui Zhan, Bowen Chen, Xiaolian Wu, Zhen Yang, Che Lin, Jinguo Lin, Xin Guan
Summary: A wood species identification model based on wood anatomy and using the Cyclobalanopsis genus wood cell geometric dataset was proposed in this study. The model was enhanced by the CTGAN deep learning algorithm and used simulated cell geometric feature dataset. Machine learning models BPNN and SVM were trained for recognition of three Cyclobalanopsis species. The results showed that the SVM model had a higher recognition accuracy than the BPNN model on the real dataset.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Education, Scientific Disciplines
Xin Guan, Yonghong Wu, Yingfei Zheng, Bing Zhang
Summary: Developing blend membrane materials is an effective way to improve the gas separation efficiency and commercial potential of membrane technologies. In this study, free-standing membranes were prepared using Pebax-1074 as the polymer matrix and poly(ethylene glycol) (PEG) as fillers. The addition of PEG significantly improved the structural and separation performance of the blend membranes. The optimal CO2 permeability and CO2/N-2 selectivity were achieved under specific conditions.
Article
Engineering, Electrical & Electronic
Shan Chengxiang, Li Qiang, Guan Xin
Summary: This paper proposes a lightweight multi-view convolutional brain tumor segmentation algorithm. It effectively fuses information between channels, adds extraction ability for nonlinear features, performs convolution from different positions, and uses group convolution to save resources. It also weighs the importance of features extracted from different views. Experimental results show that the proposed algorithm achieves high segmentation accuracy with reduced parameters and floating-point operations.
LASER & OPTOELECTRONICS PROGRESS
(2023)
