关键词：
eucalyptus plantation;sliding time window;LandTrendr;Google Earth Engine (GEE);historical dynamic
摘要：
Eucalyptus plantations are expanding rapidly in southern China owing to their short rotation periods and high wood yields. Determining the plantation dynamics of eucalyptus plantations facilitates accurate operational planning, maximizes benefits, and allows the scientific management and sustainable development of eucalyptus plantations. This study proposes a sliding-time-window change detection (STWCD) approach for the holistic characterization and analysis of eucalyptus plantation dynamics between 1990 and 2019 through dense Landsat time-series data. To achieve this, pre-processing was first conducted to obtain high-quality reflectance data and the monthly composite maximum normalized-difference vegetation index (NDVI) time series was determined for each Landsat pixel. Second, a sliding time window was used to segment the time series and obtain the NDVI change characteristics of the subsequent segments, and a sliding time window-based LandTrendr change detection algorithm was applied to detect the crucial growth or harvesting phases of the eucalyptus plantations. Third, pattern-matching technology was adopted based on the change detection results to determine the characteristics of the eucalyptus planting dynamics. Finally, we identified the management history of the eucalyptus plantations, including planting times, generations, and rotation cycles. The overall accuracy of eucalyptus identification was 90.08%, and the planting years of the validation samples and the planting years estimated by our algorithm revealed an apparent correlation of R2 = 0.98. The results showed that successive generations were mainly first- and second-generations, accounting for 75.79% and 19.83% of the total eucalyptus area, respectively. The rotation cycles of the eucalyptus plantations were predominantly in the range of 4-8 years. This study provides an effective approach for identifying eucalyptus plantation dynamics that can be applied to other short-rotation plantations.
作者机构：
[Liu, Wenliang; Huang, Si; Yan, Xiaofeng; Chen, Lili; Liu, WL; Guo, Yuntian] Hunan Univ Technol, Key Lab Adv Packaging Mat & Technol Hunan Prov, Zhuzhou 412007, Peoples R China.;[Chen, Lili] Hengyang Normal Univ, Art Inst, Hengyang 421010, Peoples R China.;[Wu, Yincai] Chinese Acad Sci, Xiamen Inst Rare Earth Mat, Xiamen 361021, Peoples R China.
通讯机构：
[Huang, S ; Liu, WL] H;Hunan Univ Technol, Key Lab Adv Packaging Mat & Technol Hunan Prov, Zhuzhou 412007, Peoples R China.
关键词：
navel orange peel pomace;soluble dietary fiber;nanocellulose;best formula
摘要：
The packaging problem with petroleum-based synthetic polymers prompts the development of edible packaging films. The high value-added reuse of navel orange peel pomace, which is rich in bioactive compounds, merited more considerations. Herein, nanocellulose (ONCC) and soluble dietary fiber (OSDF) from navel orange peel pomace are firstly used to prepare dietary fiber-based edible packaging films using a simple physical blend method, and the impact of ONCC on the film's properties is analyzed. Adopting three methods in a step-by-step approach to find the best formula for edible packaging films. The results show that dietary-fiber-based edible packaging films with 4 wt.% ONCC form a network structure, and their crystallinity, maximum pyrolysis temperature, and melting temperature are improved. What's more, dietary-fiber-based edible packaging films have a wide range of potential uses in edible packaging.
期刊：
Journal of Colloid and Interface Science,2024年664:128-135 ISSN：0021-9797
通讯作者：
Yang, Liwen
作者机构：
[Liang, Yongle; Zhang, Huaijun; Yang, Hengyu; Niu, Fengjun] School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, China;[Xu, Guobao] School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China;[Wei, Xiaolin] College of Physics and Electronics Engineering, Hengyang Normal University, Hengyang 421002, China;[Yang, Liwen] School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, China. Electronic address: ylwxtu@xtu.edu.cn
通讯机构：
[Yang, Liwen] S;School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, China. Electronic address:
关键词：
Aqueous zinc ion batteries;Electrolyte;Interface engineering;Rare earth ions;Zinc anode
摘要：
Aqueous zinc-ion batteries (AZIBs) have become an ideal candidate for large-scale energy storage systems owing to their inherent safety and highly competitive capacity. However, severe dendrite growth and side reactions on the surface of zinc metal anodes lead to quick performance deterioration, seriously impeding the commercialization of AZIBs. In this work, a self-regulated zinc metal/electrolyte interface is constructed to solve these problems by incorporating the trivalent Gd(3+) additive with a lower effective reduction potential into the aqueous ZnSO(4) electrolyte. It is revealed that the inert Gd(3+) ions preferentially adsorb on the active sites of the zinc anode, and the induced electrostatic shielding layer is beneficial to uniform Zn deposition. Meanwhile, the adsorbed Gd(3+) ions act as a buffer interface to lower the direct contact of the zinc anode with water molecules, thereby suppressing the interfacial parasitic reaction. These features endow the Zn//Zn battery using 0.2M Gd(3+) ions with 2940h of cycling life at 5mAcm(-2) and a cumulative plating capacity (CPC) of 6.2 Ah cm(-2) at 40mAcm(-2). When assembling with a MnO(2) cathode, the full cell using the modified electrolyte exhibits a high capacity of 268.9 mAh/g at 0.2 A/g, as well as improved rate capability and cycle stability. The results suggest the great potential of a rare earth ion additive in reinforcing Zn metal anodes for developing practical AZIBs.
通讯机构：
[Zhao, HH ] H;Hengyang Normal Univ, Coll Comp Sci & Technol, Hengyang 421002, Peoples R China.
关键词：
Tracking-by-detection;Multi-object tracking;Occlusion;Global information
摘要：
As a fundamental task in computer vision, multi -object tracking (MOT) has gained increasing attention due to its commercial and academic potential. However, accurately tracking multiple objects is highly challenging. The problems of object occlusion, deformation, and real-time requirements have long been obstacles to be tackled in the field of multi -object tracking. In this paper, we first propose a novel approach to address the problem of tracklet fragmentation caused by occlusion and deformation by establishing a global linking model to obtain global information on trajectories. Then, we reduce camera jitter using camera motion compensation to more accurately locate objects in the moving scene. Next, to address the issue of linear interpolation that ignores a large amount of motion information, we utilize Gaussian process regression for smooth interpolation to fill in missing detections and reduce the noise covariance of the Kalman filter through adaptive computation. We integrate our work together and ultimately propose a simple, real-time, and robust multi -object tracker named TPTrack. Through extensive experiments, our proposed TPTrack achieves HOTA scores of 63.5, 61.7, and 56.8 on the MOT17, MOT20, and DanceTrack datasets, respectively. Notably, it exhibits a significant 19% enhancement over the state-of-the-art approach, specifically on the DanceTrack dataset. Furthermore, TPTrack operates at a speed of 33.7 FPS on a single GPU. The source code is available at https://github.com/godHhh/TPTrack.
摘要：
Understanding how the electronic state of transition metal atoms can influence molecular adsorption on a substrate is of great importance for many applications. Choosing NH(3) as a model molecule, its adsorption behavior on defected SnS(2) monolayers is investigated. The number of valence electrons n is controlled by decorating the monolayer with different transition metal atoms, ranging from Sc to Zn. Density-Functional Theory based calculations show that the adsorption energy of NH(3) molecules oscillates with n and shows a clear odd-even pattern. There is also a mirror symmetry of the adsorption energies for large and low electron numbers. This unique behavior is mainly governed by the oxidation state of the TM ions. We trace back the observed trends of the adsorption energy to the orbital symmetries and ligand effects which affect the interaction between the 3σ orbitals (NH(3)) and the 3d orbitals of the transition metals. This result unravels the role which the spin state of TM ions plays in different crystal fields for the adsorption behavior of molecules. This new understanding of the role of the electronic structure on molecular adsorption can be useful for the design of high efficiency nanodevices in areas such as sensing and photocatalysis.
作者机构：
English Department, School of Foreign Languages, Hengyang Normal University, Hengyang, 421002, China;School of Education, University of New South Wales, Sydney, NSW2052, Australia;[Bin Yin] English Department, School of Foreign Languages, Hengyang Normal University, Hengyang, 421002, China<&wdkj&>School of Education, University of New South Wales, Sydney, NSW2052, Australia
期刊：
IEEE Signal Processing Letters,2024年31:661-665 ISSN：1070-9908
作者机构：
[Chen Li; Ge Jiao; Yun Wu; Weichen Zhao] School of Computer Science and Technology, Hengyang Normal University, Hengyang, China
摘要：
Camouflaged instance segmentation (CIS) aims to segment instances that are seamlessly embedded in their surroundings. Existing CIS methods often focus on utilizing global information but neglect local information, resulting in incomplete feature representation and reduced accuracy. To address this, we propose a global-to-local network (GLNet) for CIS, leveraging both global and local information for enhanced feature representation and segmentation. Specifically, GLNet consists of two main components: global capture and local refinement. In global capture, we introduce a novel dual-branch convolutional feed-forward network (Dual-FFN), which aims to more effectively capture camouflaged instances in complex scenes. In local refinement, we design a U-shape feature fusion module (UFFM) and an edge-guide fusion module (EFM). These modules facilitate the fusion of multi-scale features by cascading. As a result, the network gains an enhanced ability to discern the intricate details of camouflaged instances. Experimental results demonstrate that our GLNet outperforms existing methods, with a 49.3% average precision (AP) on the COD10K-Test.
摘要：
Glutamine dependence is a prominent feature of cancer metabolism and is essential for the growth of CT26 cells. The photobiomodulation of glutamine‐dependent CT26 cells inhibits cell apoptosis without increasing cell proliferation by regulating GLUT1, MEK/ERK, and PI3K/AKT/mTOR signals. The proliferation and apoptosis of CT26 cells with glutamine addiction are jointly completed by multiple signaling pathways. Abstract We investigated the mechanism of action of photobiomodulation (PBM) with light‐emitting diode (led) 640 nm of glutamine‐dependent CT26 cells. Cells were exposed to 0.147–10.979 mW/cm2 of 640 ± 15 nm laser light for 15 min/day for 10 days. Cell proliferation and apoptosis were detected by MTT (3‐(4,5)‐dimethylthiahiazo (‐z‐y1)‐3,5‐diphenytetrazoliumromide) and annexin V‐FITC assays. mRNA and protein levels of cell proliferation‐related genes were measured by RT‐PCR and western blotting, respectively. With Gln 7.94 mM, on Day 8 and 10, genes GLUT1, MEK1, ERK2, BCL2, E2F1, HO‐1, Ctnnb1, and Per2 was significantly upregulated (p < 0.01) of glutamine addiction. In PBM therapy, compared with the non‐illuminated group, 2.17 mW/cm2 can significantly reduce cell apoptosis, the mRNA level of gene mTOR1 was significantly upregulated, and the protein level of raptor of GLUT1 and mTOR1, MEK1/2, and ERK1/2 were upregulated. LED 640 nm inhibits cell apoptosis without increasing cell proliferation by regulating GLUT1, MEK/ERK, and PI3K/AKT/mTOR signals.
期刊：
Expert Systems with Applications,2024年249:123471 ISSN：0957-4174
通讯作者：
Gaobo Yang
作者机构：
[Dewang Wang; Gaobo Yang] School of Information Science and Engineering, Hunan University, Changsha, 410082, China;[Jiyou Chen] College of Computer Science and Technology, Hengyang Normal University, Hengyang, 421200, China;[Xiangling Ding] School of Computer Science and Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China
通讯机构：
[Gaobo Yang] S;School of Information Science and Engineering, Hunan University, Changsha, 410082, China
摘要：
A well-defined cost function is a key issue for image steganography to minimize the embedding distortion. In recent years, deep learning has been introduced into image steganography to automatically learn embedding costs and improve steganographic security. For most existing generative adversarial network (GAN) based cost learning works, the generator usually adopts an encoder–decoder architecture. However, due to repeated encoding and decoding operations, this architecture is prone to information loss, making the generator difficult to well capture fine-grained image features. In this work, we propose a novel GAN-based image steganography work that improves the cost function by learning better embedding probability maps. Specifically, we design an attention mechanism to be integrated into the U-Net architecture, which enables the generator to concentrate on texture-rich regions of input images. Moreover, an extra input stream, namely the enhanced image, is introduced into the generator, improving the generator’s ability to learn structural features from input images. Different skip connections are used for different input streams to facilitate information flow between different layers. Extensive experimental results demonstrate that the proposed approach effectively learns the embedding probability maps and achieves superior security against various steganalysis attacks.
摘要：
With the rapid advancement of urban-rural integration and rural revitalization, China's traditional villages are gradually entering a stage of comprehensive transformation from tradition to modernity, and the continuous expansion of residents' spatial, cultural, and function needs has led to an increasingly serious phenomenon of non-compliant renewal. However, there is a clear lack of guidance and support for the renewal of traditional villages. This article constructs an organic renewal framework of "logical space restoration and physical space adaptation" for traditional villages. With the Laoche village as an example, the Landscape Gene Analysis method and Photovoice method were used to precisely identify the challenges faced by Laoche village and propose precise implementation strategies for organic renewal. From the conceptual construction to the exploration of paths, it helps to solve the deep-rooted contradictions between the renewal and protection of traditional villages.
期刊：
JOURNAL OF ORGANIC CHEMISTRY,2024年89(5):2939-2950 ISSN：0022-3263
通讯作者：
Fu, Yang;Ding, QP
作者机构：
[Tan, Yuxing; Ding, Qiuping; Jiang, Wu-jiu; Fu, Yang; Ding, QP] Jiangxi Normal Univ, Key Lab Green Chem Jiangxi Prov, Key Lab Fluorine & Silicon Energy Mat & Chem, Minist Educ, Nanchang 330022, Jiangxi, Peoples R China.;[Tan, Yuxing; Jiang, Wu-jiu; Ni, Penghui] Hengyang Normal Univ, Coll Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Hunan, Peoples R China.
通讯机构：
[Fu, Y; Ding, QP ] J;Jiangxi Normal Univ, Key Lab Green Chem Jiangxi Prov, Key Lab Fluorine & Silicon Energy Mat & Chem, Minist Educ, Nanchang 330022, Jiangxi, Peoples R China.
摘要：
Herein, we developed a highly selective, efficient, and simple method for direct transamidation of thioamides with amines, promoted by commercially available acetophenone under metal-/solvent-free conditions. The reaction tolerated a wide range of functional groups and substrates, including single- or double-thioamides, benzylamines, or alkyl/cycloalkyl-substituted aliphatic amines. The present protocol can be applied to gram-scale in good yields. In addition, the Pt-/Ni-complexes of double-transamidation products were obtained in good to excellent yields. The investigation of photophysical properties indicated that the fluorescence spectra of Pt-complexes showed an emission band centered at 550-750 nm and exhibited red fluorescence when irradiated by a UV lamp (365 nm).
通讯机构：
[Zhang, DZ ] H;[Ma, J ] C;Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421008, Peoples R China.;Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China.
摘要：
The plasma equilibrium plays a crucial role in nuclear fusion studies, serving as the foundation for various aspects of fusion research, including plasma stability, transport, and current drive. In this paper, a new Grad-Shafranov equation solver is developed for the fixed-boundary plasma equilibria with toroidal flow. This solver utilizes the pressure profile, safety factor profile (not current profile), and any two profiles of the toroidal angular velocity, plasma temperature, and square of the Mach number as inputs. The numerical results obtained by this solver exhibit good agreement with known analytic solution under identical parameters, and the potential applications of the solver are demonstrated through several numerical equilibria with toroidal flow. It is very convenient to apply this code to simulate the tokamak equilibrium with a smooth plasma shape. In addition, the effect of toroidal flow on the plasma equilibria is investigated as a simple application. The results reveal a notable outward shift in the contour profiles of magnetic flux surface, density, pressure, and temperature induced by toroidal flow.
作者机构：
Authors to whom correspondence should be addressed.;Faisalabad Business School, National Textile University, Faisalabad 37610, Pakistan;School of Journalism and Communication, Hengyang Normal University, Hengyang 421010, China;[Muhammad Asif] School of Media, Hunan University of Science and Engineering, Yongzhou 425199, China;[Liu Yang] Authors to whom correspondence should be addressed.<&wdkj&>School of Journalism and Communication, Hengyang Normal University, Hengyang 421010, China
通讯机构：
[Liu Yang; Muhammad Hashim] A;Authors to whom correspondence should be addressed.<&wdkj&>Faisalabad Business School, National Textile University, Faisalabad 37610, Pakistan<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>School of Journalism and Communication, Hengyang Normal University, Hengyang 421010, China
摘要：
The Chinese manufacturing industry faces many challenges to sustainable development. This study examines how transformational leadership, corporate culture, and digital transformation affect Chinese manufacturing organizations’ sustainability. It will also examine the moderating role of environmental dynamism and the mediating effect of innovation capabilities. A self-administered survey was distributed to 350 manufacturing companies’ owners, managers, leaders, and employees, etc. Participants were selected via convenient sampling. This data collection effort validated findings and empirically tested theories. Smart PLS structural equation modelling (PLS-SEM), quantitative research, and cross-research are used in this study. The findings suggest that corporate culture, transformational leadership, and digital transformation significantly affect organizations’ sustainability. Innovation capability does not affect the relationship between corporate culture and sustainability. However, it mediates the relationship between transformational leadership, digital transformation, and business sustainability. Innovation capabilities and business sustainability performance are moderated by environmental dynamism. This study contributes to sustainable corporate performance theory by showing managers how transformational leadership, digital transformation, and corporate culture can help manufacturing companies grow indefinitely. The findings have major implications for China, a highly industrialized nation. This study could benefit regulatory authorities, academic institutions, industry, government agencies, and researchers.
期刊：
Journal of Physical Chemistry Letters,2024年15(10):2867-2875 ISSN：1948-7185
作者机构：
[Tan, Jieyao; Jiang, Xingxing] College of Physics and Electronics Engineering, Hengyang Normal University, Hengyang 421002, China;[Liu, Dongyu; Vasenko, Andrey S; Jiang, Xingxing] HSE University, 101000 Moscow, Russia;[Feng, Yexin; Chen, Ke-Qiu] Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China;[Long, Run] Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China;[Vasenko, Andrey S] Donostia International Physics Center (DIPC), 20018 San Sebastián-Donostia, Euskadi, Spain
摘要：
The rapid recombination of photogenerated carriers heavily restricts the photocatalytic efficiency. Here, we propose a new strategy to improve catalytic efficiency based on the ferroelectric van der Waals heterostructure (CuBiP(2)Se(6)/C(2)N). Combining density functional theory and the nonadiabatic molecular dynamics (NAMD) method, we have systematically analyzed the ground-state properties and carrier dynamics images in the CuBiP(2)Se(6)/C(2)N heterostructure. Our calculations showed that the ferroelectric polarization of CuBiP(2)Se(6) provides the internal driving force for the photogenerated carriers separation. NAMD results demonstrate that the excited-state carrier transfer and recombination processes in the CuBiP(2)Se(6)/C(2)N are consistent with a type II mechanism. Meanwhile, constructing the ferroelectric heterostructure can effectively prolong the carrier lifetime, from ∼65.98 to ∼124.54 ps. Moreover, the high quantum efficiency and tunable band edge positions mean that the CuBiP(2)Se(6)/C(2)N heterostructure is an excellent potential candidate material for photocatalytic water splitting.
作者机构：
[Lian-Tong Zhou] Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China;College of Earth Sciences, University of Chinese Academy of Sciences, Beijing, China;Ningxia Key Laboratory for Meteorological Disaster Prevention and Reduction, Yinchuan, China;Ningxia Meteorological Observatory, Yinchuan, China;College of Geography and Tourism, Hengyang Normal University, Hengyang, China
通讯机构：
[Lian-Tong Zhou] C;Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
关键词：
Rainfall;North China;Meridional SST gradient
摘要：
The rainfall over North China (NC) in July 2021 was the most since 1980, and coincided with a meridional gradient of sea surface temperature anomaly (MGSSTA) in the Pacific. The present study shows that the gradient between the positive sea surface temperature anomaly (SSTA) over the northwestern Pacific and the negative SSTA over the tropical central Pacific was the main reason for the enhanced rainfall in NC in July 2021 because of its influence on the anomalous northward movements of the western North Pacific anticyclone (WNPAC) and its southern cyclone. The associated easterly wind anomalies along the southern flank of the WNPAC converged with the anomalous easterly along the north flank of the anomalous cyclone, transporting more moisture from south to NC. Meanwhile, the MGSSTA likely induced an anomalous reversed Hadley circulation accompanied by distinct southerly wind anomalies in the low troposphere. These anomalies favored a strong monsoon circulation, which is often accompanied by a rain band in a more northern location.
摘要
2021年7月, 华北地区的降水量突破1980年以来的极值, 这与太平洋海温异常的经向梯度相吻合. 研究表明, 西北太平洋正海温异常与热带中太平洋负海温异常之间的梯度是2021年7月华北地区降水异常偏多的主要原因, 该梯度使得西北太平洋反气旋及其南部的气旋北移, 汇合的偏东风将大量水汽从海洋输送到华北地区, 使得华北地区降水偏多. 同时, 太平洋海温异常的经向梯度可能在对流层低层触发异常的反向哈德利环流, 伴随着南风异常, 使得季风环流增强, 雨带偏北.
