通讯机构：
[Qiu, RH ; Xiong, BQ ; Chen, Y ] H;Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Peoples R China.;Hunan Univ Chinese Med, Sch Med, Dept Physiol, Changsha 410208, Peoples R China.;Hunan Inst Sci & Technol, Dept Chem & Chem Engn, Yueyang 414006, Peoples R China.
摘要：
In this study, we present a nickel-catalyzed reductive C(sp3)–Sb coupling of unactivated alkyl chlorides with chlorostibines. This approach is highly versatile, tolerating various functional groups such as acetal, alkene, nitrile, amine, ester, silyl ether, thioether, and various heterocyclic compounds. Notably, the late-stage modification of bioactive molecules and the satisfactory anticancer activity against cancerous MDA-MB-231 also demonstrate the potential application.
期刊：
Journal of Heterocyclic Chemistry,2024年61(4) ISSN：0022-152X
通讯作者：
Liu, Aiping;Lan, SL;Xie, JJ
作者机构：
[Xie, Jianjun; Li, Guojun] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha, Peoples R China.;[Lan, Shilin; Ouyang, Wensen; Liu, Aiping; Long, Chuyun; Li, Jun; Li, Guojun; Li, Jianming; Xiao, Ting; Hu, Li] Hunan Res Inst Chem Ind, Natl Engn Res Ctr Agrochem, Changsha, Peoples R China.;[Liu, Aiping] Hunan Prov Key Lab Agrochem, Changsha, Peoples R China.;[Xiao, Ting] Changsha Univ Sci & Technol, Sch Chem & Chem Engn, Changsha, Peoples R China.;[Lan, Shilin; Liu, Aiping; Liu, AP; Lan, SL] Hunan Res Inst Chem Ind, Natl Engn Res Ctr Agrochem, Changsha 410007, Peoples R China.
通讯机构：
[Liu, AP; Lan, SL ] H;[Xie, JJ ] C;Hunan Res Inst Chem Ind, Natl Engn Res Ctr Agrochem, Changsha 410007, Peoples R China.;Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Peoples R China.
摘要：
By connecting the key intermediate trifluoroethyl sulfide with pyrimidinamine, we obtained T4 with LC50 was 0.19 mg/L against T. urticae and T15 with EC50 was 1.32 mg/L against P. sorghi after active testing and structural optimization. Abstract In order to overcome the problem of pesticide resistance, it is necessary to discover novel pesticides with new mechanisms of action. Herein, a series of novel pyrimidin‐4‐amine derivatives containing trifluoroethyl sulfide moiety were designed and synthesized. Bioassays indicated that the title compounds synthesized possessed excellent acaricidal activity against Tetranychus urticae and fungicidal activity against Erysiphe graminis and Puccinia sorghi. Especially, the acaricidal activity of 5‐chloro‐6‐(difluoromethyl)‐N‐(2‐(2‐fluoro‐4‐methyl‐5‐((2,2,2‐trifluoroethyl)thio)phenoxy)ethyl)pyrimidin‐4‐amine (compound T4, LC50 = 0.19 mg/L) against T. urticae was close to commercial acaricide cyenopyrafen, and the fungicidal activity of 5‐chloro‐6‐(difluoromethyl)‐2‐methyl‐N‐(2‐(3‐((2,2,2‐trifluoroethyl)thio)phenoxy)ethyl)pyrimidin‐4‐amine (compound T15, EC50 = 1.32 mg/L) against P. sorghi. was superior to commercial fungicide tebuconazole. The synthesis and characterization of these compounds were given and the structure–activity relationships were discussed.
期刊：
Multimedia Tools and Applications,2024年83(4):10211-10231 ISSN：1380-7501
通讯作者：
Aibin Chen
作者机构：
[Wen, Zhifang; Chen, Aibin; Zhou, Guoxiong; Yi, Jizheng] Institute of Artificial Intelligence Application, Central South University of Forestry and Technology, Changsha, China;[Peng, Weixiong] Hunan Zixing Artificial Intelligence Technology Group Co, Ltd, Beijing, China
通讯机构：
[Aibin Chen] I;Institute of Artificial Intelligence Application, Central South University of Forestry and Technology, Changsha, China
关键词：
Music genre classification;Attention mechanism;Convolutional neural network;Global time–frequency correlation;Mel-spectrogram
摘要：
Music genre classification (MGC) is an indispensable branch of music information retrieval. With the prevalence of end-to-end learning, the research on MGC has made some breakthroughs. However, the limited receptive field of convolutional neural network (CNN) cannot capture a correlation between temporal frames of sounding at any moment and sound frequencies of all vibrations in the song. Meanwhile, time–frequency information of channels is not equally important. In order to deal with the above problems, we apply dual parallel attention (DPA) in CNN-5 to focus on global dependencies. First, we propose parallel channel attention (PCA) to build global time–frequency dependencies in the song and study the influence of different weighting methods for PCA. Next, we design dual parallel attention, which focuses on global time–frequency dependencies in the song and adaptively calibrates contribution of different channels to feature map. Then, we analyzed the effect of applying different numbers and positions of DPA in CNN-5 for performance and compared DPA with multiple attention mechanisms. The results on GTZAN dataset demonstrated that the proposed method achieves a classification accuracy of 91.4%, and DPA has the highest performance.
期刊：
Computer-Aided Civil and Infrastructure Engineering,2024年39(4):617-634 ISSN：1093-9687
通讯作者：
Zhou, GX
作者机构：
[Yang, Yixin; Sun, Lixiang; Zhou, Guoxiong; Chen, Aibin; Zhang, Yukai] Cent South Univ Forestry & Technol, Coll Comp & Informat Engn, Changsha 410004, Peoples R China.;[Cai, Weiwei] Jiangnan Univ, Coll Artificial Intelligence & Comp Sci, Wuxi, Peoples R China.;[Li, Liujun] Univ Idaho, Dept Soil & Water Syst, Moscow, ID USA.
通讯机构：
[Zhou, GX ] C;Cent South Univ Forestry & Technol, Coll Comp & Informat Engn, Changsha 410004, Peoples R China.
摘要：
Abstract The segmentation accuracy of bridge crack images is influenced by high‐frequency light, complex scenes, and tiny cracks. Therefore, an integration–competition network (complex crack segmentation network [CCSNet]) is proposed to address these problems. First, a grayscale‐oriented adjustment algorithm is proposed to solve the high‐frequency light problem. Second, an integration–competition mechanism is proposed to detach complex backgrounds and grayscale features of cracks. Finally, a tiny attention mechanism is proposed to extract the shallow features of tiny cracks. CCSNet outperforms seven state‐of‐the‐art crack segmentation methods in both generalization and comparison experiments on self‐built dataset and four public datasets. It also achieved excellent performance in practical bridge crack tests. Therefore, CCSNet is an effective auxiliary method for lowering the cost of bridge safety detection.
摘要：
The modulation mechanism of iron (Fe) and manganese (Mn) in transition-metal elements on the interface bonding and mechanical properties of bronze (Cu3Sn)-based/diamond composites is investigated through first-principles calculations. Transition-elements-doping scenarios are investigated employing six-layer slab models. It is revealed that the doping of Fe or Mn can make the Cu3Sn/diamond interface more stable, which effectively improves the wettability of the Cu3Sn/diamond interface based on the calculation results and analysis of interface energy, differential charge density model, and density of states. However, co-doping with both Fe and Mn weakens the wettability of the Cu3Sn/diamond interface. Finally, wettability tests and microstructure characterizations demonstrate that the doping of Fe and Mn represents an effective approach to controlling the interface bonding performance of bronze/diamond composites. Fe- and Mn-doping effects on the interface binding and mechanical properties of Cu3Sn/diamond composites are studied using first-principles calculations. Analysis of interface energy, charge density models, and density of states reveals that individual Fe or Mn doping improves Cu3Sn//diamond interface wettability. Conversely, co-doping weakens Cu3Sn/diamond interface wettability. Wettability tests and microscopic characterization validate these findings.image (c) 2023 WILEY-VCH GmbH
摘要：
Wildfires and post-fire management exert profound effects on soil properties and microbial communities in forest ecosystems. Understanding microbial community recovery from fire and what the best post-fire management should be is very important but needs to be sufficiently studied. In light of these gaps in our understanding, this study aimed to assess the short-term effects of wildfire and post-fire management on both bacteria and fungi community composition, diversity, structure, and co-occurrence networks, and to identify the principal determinants of soil processes influencing the restoration of these communities. Specifically, we investigated soil bacterial and fungal community composition, diversity, structure, and co-occurrence networks in lower subtropical forests during a short-term (<3 years) post-fire recovery period at four main sites in Guangdong Province, southern China. Our results revealed significant effects of wildfires on fungal community composition, diversity, and co-occurrence patterns. Network analysis indicated reduced bacterial network complexity and connectivity post-fire, while the same features were enhanced in fungal networks. However, post-fire management effects on microbial communities were negligible. Bacterial diversity correlated positively with soil microbial biomass nitrogen, soil organic carbon, and soil total nitrogen. Conversely, based on the best random forest model, fungal community dynamics were negatively linked to nitrate-nitrogen and soil water content. Spearman's correlation analysis suggested positive associations between bacterial networks and soil factors, whereas fungal networks exhibited predominantly negative associations. This study elucidates the pivotal role of post-fire management in shaping ecological outcomes. Additionally, it accentuates the discernible distinctions between bacterial and fungal responses to fire throughout a short-term recovery period. These findings contribute novel insights that bear significance in evaluating the efficacy of environmental management strategies.
作者机构：
[Xiangyun Ding; Zeshuai Deng; Xin Xia; Mu Zhang; Bing Zhang] Institute of Wildlife Conservation, Central South University of Forestry and Technology, Changsha 410004, China;Author to whom correspondence should be addressed.;[Guoxing Deng; Xiangying Chen] Administration Bureau of Hunan Mangshan National Nature Reserve, Chenzhou 423000, China;[Daode Yang] Institute of Wildlife Conservation, Central South University of Forestry and Technology, Changsha 410004, China<&wdkj&>Author to whom correspondence should be addressed.
通讯机构：
[Daode Yang] I;Institute of Wildlife Conservation, Central South University of Forestry and Technology, Changsha 410004, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
This study explores the critical issue of understanding the potential impacts of climate change on the habitat suitability of the highly endangered forest-dwelling Mangshan pit viper (Protobothrops mangshanensis) in China. Through the application of the MaxEnt model, high-resolution bioclimatic datasets, and species occurrence data, the research aims to elucidate the spatial and temporal dynamics of P. mangshanensis distribution from the present to the years 2050 and 2070. Through the integration of three climate models from the Coupled Model Intercomparison Project Phase 6 (CMIP6) and exploring different shared socioeconomic pathway (SSP) scenarios (SSP126, SSP370, and SSP585), the study seeks to provide comprehensive insights into the potential variations in habitat suitability under diverse future climate conditions. The methodology employed involves the construction of the MaxEnt model utilizing the BioClim dataset and 83 species occurrence points. The SSP scenarios mentioned above represent future climate change scenarios, and the accuracy of the model is evaluated using the area under the receiver-operating characteristic (ROC) curve (AUC). Key findings reveal that the MaxEnt model exhibits high accuracy (AUC = 0.998), pinpointing the current suitable habitat for P. mangshanensis to be confined to the Mangshan area within the Nanling Mountains, covering an approximate area of 1023.12 km2. However, projections based on future climate scenarios suggest notable shifts in habitat suitability dynamics. While potential suitable habitats may emerge in the northwest of the current range, the existing suitable habitats are anticipated to undergo significant reduction or even complete disappearance. Notably, precipitation during the driest month emerges as a critical determinant influencing the distribution of the species. In conclusion, the study underscores the exacerbating impact of climate change on habitat deterioration and survival risks for P. mangshanensis, emphasizing the urgent need for conservation measures to safeguard the remaining suitable habitats for this endangered species. The implications of these findings are far-reaching, with the anticipated contraction of the snake’s range potentially leading to its disappearance and increased habitat fragmentation. By shedding light on the potential distributional changes of P. mangshanensis in Mangshan, the research provides valuable insights for informing targeted conservation strategies and policy interventions aimed at mitigating the adverse effects of climate change on endangered species.
摘要：
This paper proposes a novel type of cold-formed steel (CFS) built-up closed L-shaped section column (CSBC-L). The CSBC-L is a part of the novel special built-up column prefabricated modularized mid-rise CFS structural system (SPMM-CFS), and it can be used to compose the corner-column modulus. The CSBC-L can install sheathing walls in two crossed directions without any other connecting components, and it exhibits large torsional stiffness and inertia moment. This paper conducted experimental investigations on the compressive behavior of CSBC-L with different configurations. Totally 18 test specimens with different plate thicknesses, web heights and screw spacings were designed and tested. The results show that the ultimate strength of CSBC-L can be effectively improved with increasing the web height and plate thickness. Finite element (FE) models were developed for the test specimens, and the failure modes as well as the nonlinear load-displacement curves were simulated and validated. Finally, the effective width method (EWM) and direct strength method (DSM) are used to predict the ultimate strength of the CSBC-L specimens in AISI S100-16 and EN 1993-1-3. It is found that the DSM is more accurate to predict the axial compressive ultimate strength, and most of the errors are less than 10%.
作者机构：
[Ziyi Wang; Xiaoyuan Luo] School of Materials Science and Engineering, Central South University of Forestry, Changsha 410004, China;Author to whom correspondence should be addressed.;[Xiaogang Duan] Central South Intelligence Collaborative Research Center, Changsha 410004, China;[Yihua Li] School of Logistics & Traffic, Central South University of Forestry, Changsha 410004, China;[Wenjing Huang] School of Materials Science and Engineering, Central South University of Forestry, Changsha 410004, China<&wdkj&>Author to whom correspondence should be addressed.
通讯机构：
[Wenjing Huang] S;School of Materials Science and Engineering, Central South University of Forestry, Changsha 410004, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
Surface electromyography (sEMG) signals are the sum of action potentials emitted by many motor units; they contain the information of muscle contraction patterns and intensity, so they can be used as a simple and reliable source for grasping mode recognition. This paper introduces the InRes-ACNet (inception–attention–ACmix-ResNet50) model, a novel deep-learning approach based on ResNet50, incorporating multi-scale modules and self-attention mechanisms. The proposed model aims to improve gesture recognition performance by enhancing its ability to extract channel feature information within sparse sEMG signals. The InRes-ACNet model is evaluated on the NinaPro DB1 and NinaPro DB5 datasets; the recognition accuracy for these datasets can reach 87.94% and 87.04%, respectively, and recognition accuracy can reach 88.37% in the grasping mode prediction of an electromyography manipulator. The results show that the fusion of multi-scale modules and self-attention mechanisms endows a strong ability for the task of gesture recognition based on sparse sEMG signals.
作者机构：
[Niu, Guoxiang] Chinese Acad Sci, Lushan Bot Garden, Jiujiang 332900, Peoples R China.;[Liu, Tao] Cent South Univ Forestry & Technol, Natl Engn Lab Appl Technol Forestry & Ecol South C, Changsha 410004, Peoples R China.;[Zhao, Zhen; Lu, Xiankai; Niu, Guoxiang; He, Xiaoxiang; Guan, Huiling; Liu, Tao; Zhang, Xuebing] Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Eco, South China Bot Garden, Guangzhou 510650, Peoples R China.;[Niu, Guoxiang] Lund Univ, Dept Biol, Sect Microbial Ecol, S-22362 Lund, Sweden.;[Liu, Tao] Lutou Natl Stn Sci Observat & Res Forest Ecosyst H, Yueyang 414000, Peoples R China.
通讯机构：
[Liu, T ] C;Cent South Univ Forestry & Technol, Natl Engn Lab Appl Technol Forestry & Ecol South C, Changsha 410004, Peoples R China.
关键词：
Tropical and subtropical forest;Soil organic matter fractions;Earthworm;Millipedes;Litter decomposition
摘要：
Background: Forest soils in tropical and subtropical areas store a significant amount of carbon. Recent frameworks to assess soil organic matter (SOM) dynamics under evolving global conditions suggest that dividing bulk SOM into particulate and mineral -associated organic matter (POM vs. MAOM) is a promising method for identifying how SOM contributes to reducing global warming. Soil macrofauna, earthworms, and millipedes have been found to play an important role in facilitating SOM processes. However, how these two co-existing macrofaunae impact the litter decomposition process and directly impact the formation of POM and MAOM remains unclear. Methods: Here, we set up a microcosm experiment, which consisted of 20 microcosms with four treatments: earthworm and litter addition (E), millipedes and litter addition (M), earthworm, millipedes, and litter addition (E+M), and control (only litter addition) in five replicates. The soil and litter were sterilized prior to beginning the incubation experiment to remove any existing microbes. After incubating the samples for 42 days, the litter properties (mass, C, and N contents), soil physicochemical properties, as well as the C and N contents, and POM and MAOM 13C abundance in the 0-5 and 5-10 cm soil layers were measured. Finally, the relative influences of soil physicochemical and microbial properties on the distribution of C and N in the soil fractions were analyzed. Results: The litter mass, C, and N associated with all four treatments significantly decreased after incubation, especially under treatment E+M (litter mass: -58.8%, litter C: -57.0%, litter N: -75.1%, respectively), while earthworm biomass significantly decreased under treatment E. Earthworm or millipede addition alone showed no significant effects on the organic carbon (OC) and total nitrogen (TN) content in the POM fraction, but joint addition of both significantly increased OC and TN regardless of soil depth. Importantly, all three macrofauna treatments increased the OC and TN content and decreased the 13C abundance in the MAOM fraction. More than 65% of the total variations in the distribution of OC and TN throughout the two fractions can be explained by a combination of soil physicochemical and microbial properties. Changes in the OC distribution in the 0-5 cm soil layer are likely due to a decrease in soil pH and an increase in arbuscular mycorrhizal fungi (AMF), while those in the 5-10 cm layer are probably caused by increases in soil exchangeable Ca and Mg, in addition to fungi and gram -negative (GN) bacteria. The observed TN distribution changes in the 0-5 cm soil likely resulted from a decrease in soil pH and increases in AMF, GN, and gram -negative (GP) bacteria, while TN distribution changes in the 5-10 cm soil could be explained by increases in exchangeable Mg and GN bacteria. Conclusions: The results indicate that the coexistence of earthworms and millipedes can accelerate the litter decomposition process and store more C in the MAOM fractions. This novel finding helps to unlock the processes by which complex SOM systems serve as C sinks in tropical forests and addresses the importance of soil macrofauna in maintaining C -neutral atmospheric conditions under global climate change.
作者机构：
[Haifei Chen; Zhifeng Yang; Jianan Liu; Zhong Xi] Engineering Research Center for Forestry Equipment of Hunan Province, Central South University of Forestry and Technology, Changsha 410004, China;[Jianwu Yu; Kaifeng Huang] College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China;Author to whom correspondence should be addressed.;[Hong Luo] Engineering Research Center for Forestry Equipment of Hunan Province, Central South University of Forestry and Technology, Changsha 410004, China<&wdkj&>College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China<&wdkj&>Author to whom correspondence should be addressed.
通讯机构：
[Hong Luo] E;Engineering Research Center for Forestry Equipment of Hunan Province, Central South University of Forestry and Technology, Changsha 410004, China<&wdkj&>College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
The optimal tuning of high-order motion parameters has emerged as a promising strategy for actively controlling the kinematics/dynamics of high-speed cam mechanisms. However, accomplishing this task remains challenging with current low-order interpolation or tuning methods. This study proposes an integrated high-order interpolation and tuning methodology for the optimal construction of high-speed motion curves. Initially, an explicit C4-spline interpolant (C4SI) is developed. This interpolant utilizes four-order continuous (C4) splines to synthesize a high-fidelity motion curve that satisfies the predefined motion constraints up to the fourth order, including dimensionless displacement, velocity, acceleration, jerk, and quirk. Concerning the reduction of motion peaks, a unique C4SI-based global kinematics optimization strategy is designed, using the definite integral of the motion curve (free of the time variable) as the objective function. This facile time-free optimization strategy could yield a simultaneous reduction in multiple motion peaks (up to five), which is currently inaccessible with conventional motion tuning strategies. Concerning the improvement of dynamic characteristics, the C4SI-based time-free global dynamics optimization of variable motion parameters is further performed. The results indicate that the optimized fourth-order motion curve offers minimal high-speed transmission error and residual vibration over the whole rise-dwell-return-dwell cycle, which outperforms the standard motion curves and other low-order counterparts.
摘要：
Both financial development and technological innovation are critical issues for policy-makers and academics in high-quality economic development. From the perspective of the geographical structure of the financial supply, this paper measures the number of financial institutions within a certain radius around an enterprise using the information on its geographical location and that of surrounding financial institutions to explore the impact of financial density on the enterprise's innovation quality, as well as the transmission mechanism. Rising financial density improves enterprise innovation quality, and this enhancement effect is mainly manifested in patent generality rather than patent originality. As the geographic radius expands, the effect of financial density on enterprise innovation quality increases and then decreases. Financial accessibility and competitive banking channels are the primary transmission mechanisms of financial density on enterprise innovation quality. In addition, the promotional effect of financial density on enterprise innovation quality is heterogeneous according to regional, industry, and enterprise characteristics. Finally, further analysis indicates that financial density will promote both innovation quality and quantity by motivating firms to engage in patent R&D behaviors that are highly technologically advanced. In addition, financial density enhances enterprises' innovation efficiency by increasing bank competition. Similarly, financial density is also conducive to increasing enterprises' commercial credit and financial liabilities. Therefore, the government should accelerate the development of an inclusive financial system, improve the coverage and penetration rates of the spatial layout of financial institutions, and encourage high-quality economic development by encouraging technologically advanced and innovative firms.
期刊：
Economic Systems Research,2024年:01 ISSN：0953-5314
通讯作者：
Xie, R
作者机构：
[Zhao, Guomei] Cent South Univ Forestry & Technol, Sch Econ, Changsha, Peoples R China.;[Zhao, Guomei] Res Ctr High Qual Dev Ind Econ, Key Res Base Philosophy & Social Sci Hunan Prov, Changsha, Peoples R China.;[Xie, Rui] Hunan Univ, Sch Econ & Trade, Changsha, Peoples R China.;[Su, Bin] Natl Univ Singapore, Energy Studies Inst, Singapore, Singapore.;[Wang, Qunwei] Nanjing Univ Aeronaut & Astronaut, Sch Econ & Management, Nanjing, Peoples R China.
通讯机构：
[Xie, R ] H;Hunan Univ, Changsha 410079, Peoples R China.
摘要：
This paper constructs a comparative analysis framework on how the input-output (IO) model with technical differences affects the calculation of the pollution terms of trade (PTT) and the tests of the pollution haven hypothesis. Specifically, the CO2 terms of trade (CTT) of the world's major economies are calculated based on five IO models, and chain additive structure decomposition analysis (SDA) is conducted to examine the roles of different factors in the changes in CTT. The economic phenomena reflected by the CTT measured by these IO models are found to be different, and a comparative analysis shows that different IO models are suitable for studying different economic problems. Suggestions are provided on the application of different IO models in the calculation of economic indicators and the study of economic issues. Policy makers need to be cautious about policy recommendations based on the results obtained from different IO models.
作者机构：
[Yang, Zeng; Luan, Liu; Xiudan, Wang] Laboratory of Insect Behavior and Evolutionary Ecology, College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan 410004, China Central South University of Forestry and Technology Changsha China
摘要：
A new species of gall inquiline, Synergusdilatatussp. nov., is described from Hubei Province, China. Morphological descriptions, photographs and biological information are provided. Mitochondrial cytochrome oxidase (COI) sequences of the new species were newly obtained and a molecular species delimitation analysis of 12 species of Synergus performed using the ASAP method recovered 16 molecular operational taxonomic units, providing support for recognition of the new species. The results also highlight a few conflicts between morphological and molecular species delimitations in Synergus.
