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CSTN: A cross-region crop mapping method integrating self-training and contrastive domain adaptation

INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION 2025年 136卷

作者： peng, shuwen Zhang, Liqiang Xie, Rongchang Qu, Ying Beijing Normal Univ Fac Geog Sci State Key Lab Remote Sensing Sci Beijing 100875 Peoples R China Peking Univ Ctr Data Sci Beijing 100871 Peoples R China

Crop mapping is essential for agricultural management and food production monitoring, but challenges like limited crop labels and poor model generalization significantly hinder large-scale crop mapping. Here, we introduce a novel Contrastive Self-Training Network (CSTN), integrating a self-training strategy and contrastive domain adaptation (CDA) for cross-region crop mapping. CSTN uses pseudo-labels in the target region generated by the self-training strategy to assist supervised learning, and aligns features across regions using class-aware prototypes. Qualitative and quantitative evaluations demonstrate that CSTN significantly outperforms state-ofthe-art methods with a 12.29 % increase in average F1-score, particularly in maize identification. Moreover, CSTN also enables early-season crop classification for pre-harvest decision-making applications. The interpretability of the model is demonstrated through an in-depth analysis of feature map visualizations, attention map visualizations, and the effectiveness of the modules. This study provides a robust method for enhancing largescale crop mapping and facilitating more accurate and timely agricultural practices.

关键词： Crop mapping Satellite imagery time series Pseudo-labels Contrastive Domain Adaptation Model interpretability

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Nano-flower spherical NiFe LDH adsorbent for efficient removal of H2S in blast furnace gas

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JOURNAL OF HAZARDOUS MATERIALS 2025年 489卷 137622页

作者： peng, shuwen Li, Yuran Wang, Bin Cui, Yanbin Tian, Jinglei Liu, Hongqiang Zhu, Tingyu Chinese Acad Sci Inst Proc Engn Innovat Acad Green Manufacture CAS Key Lab Green Proc & Engn Beijing 100190 Peoples R China Univ Chinese Acad Sci Beijing 100190 Peoples R China HBIS Grp Co Ltd Shijiazhuang 050023 Peoples R China Chinese Acad Sci Inst Urban Environm Ctr Excellence Reg Atmospher Environm Xiamen 361021 Peoples R China

Removal of sulfur species from blast furnace gas is urgently needed due to the strict emission limits imposed on iron-steel industrial flue gas. Improving the sulfur capacity of H2S is a crucial challenge to reduce the operation cost. NiFe layered double hydroxide (LDH) adsorbents were synthesized using the hydrothermal method to strengthen the adsorption of H2S, achieving a high sulfur capacity of 133.6 mg/g at 50 degrees C. Characterization studies have revealed that the reaction pathway of H2S on the NiFe LDH surface involves adsorption, dissociation and oxidation. It has been clarified that the high sulfur capacity can be attributed to the abundant H2S dissociation sites and the excellent O2 activation sites. The dissociation sites of H2S encompass metal sites, -OH and CO32-. The interaction between O2 and the bridge site of asymmetric metal atoms significantly enhances the dissociation of O2. Strengthening the dissociation of H2S and O2 improves the sulfur capacity. The deactivation of adsorbents comes from the continuous consumption of oxygen species mainly composed of -OH and the deposition of sulfur species in the smaller mesopores ranging from 2 to 10 nm. This work provides useful insights into designing highly efficient iron-based adsorbents for the desulfurization of blast furnace gas.

关键词： Layered double hydroxide Adsorption Catalytic oxidation Hydrogen sulfide Blast furnace gas

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A fluorescent and colorimetric probe enables simultaneous differential detection of Hg²⁺ and Cu²⁺ by two different mechanisms

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SENSORS AND ACTUATORS B-CHEMICAL 2017年 238卷 455-461页

作者： Gao, Yunling Zhang, Cong peng, shuwen Chen, Haiyan Zhejiang Univ Technol Coll Chem Engn State Key Lab Breeding Base Green Chem Synth Tech Hangzhou 310032 Zhejiang Peoples R China China Pharmaceut Univ Sch Engn Dept Biomed Engn Nanjing 210009 Jiangsu Peoples R China

A new Schiff-base fluorescence probe CS containing benzimidazole and coumarin fluorophores was synthesized and characterized by NMR, IR and ESI-MS. Fluorescence and absorption spectra show the unique changes in the presence of Hg2+ and Cu2+. Hg2+ induces a remarkable fluorescence enhancement and results in mercury-promoted hydrolysis of a mercury-CS complex to convert the imine group to the aldehyde group. Cu2+ leads to a colorimetric change from colorless to pale yellow and causes formation of a copper-CS complex. Thus, CS can act as a fluorescent chemodosimeter for Hg2+ and a naked-eye chemosensor Cu2+. The cell imaging experiments for Hg2+ show a slow enhancement of a bright blue fluorescence with increasing incubation time, while Cu2+ instantly quenches the fluorescence and then the fluorescence intensity has no further change by extending the incubation time. Therefore, the probe CS shows its potential application for simultaneous differential detection of Hg2+ and Cu2+ in living cells based on the fluorescence response time. (C) 2016 Elsevier B.V. All rights reserved.

关键词： Probe Copper Mercury Fluorescence Colorimetric Simultaneous differential detection

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Numerical study on heat transfer of two-phase fluid in helical coil pipe under ocean condition

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APPLIED THERMAL ENGINEERING 2025年 258卷

作者： Xu, Xinyan Yu, shuwen peng, Changhong Univ Sci & Technol China Sch Nucl Sci & Technol 96 Jinzhai Rd Hefei 230026 Peoples R China

The thermal hydraulic characteristics and heat transfer of two-phase fluid in helical coil once-through steam generator under ocean conditions like rolling and heaving motions are studied numerically. A CFD model is established to analyze the effects of motion parameters like amplitude, period and rolling radius and the heat flux distribution are discussed. The analysis shows that the overall heat transfer decreases under ocean conditions, but the overall deterioration is limited, indicting the helical coil pipe has the stability for ocean conditions. The additional forces like Coriolis, centrifugal and inertial forces introduced by rolling motion are analyzed theoretically and the result shows it detorts the original two main vortexes responsible for high heat transfer due to its spiral geometry, making heat transfer fluctuates up and down periodically near the steady state value. As rolling height increases, the heat transfer is nonlinear due to the competition between Coriolis force and centrifugal and inertial forces. As rolling amplitude increases, the heat transfer variation increases and the local heat transfer deterioration is severely aggravated, indicating high rolling amplitude should be avoided as possible. Increasing rolling period makes heat transfer behavior more approximate to static case as gravity and centrifugal force due to spiral geometry is dominate. Under heaving motion, the overall heat transfer decreases, and increasing heaving amplitude and decreasing period make the fluctuation more severe.

关键词： Ocean condition Helical coil pipe Heat transfer Numerical simulation

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Numerical study on transient critical heat flux prediction with dynamic bubble simulation under exponentially escalating heat input

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ENERGY 2025年 323卷

作者： Xu, Xinyan Yu, shuwen peng, Changhong Univ Sci & Technol China Sch Nucl Sci & Technol 96 Jinzhai Rd Hefei 230026 Peoples R China Nucl Power Inst China Natl Key Lab Nucl Reactor Technol Chengdu Peoples R China

This paper presents the development and validation of numerical transient critical heat flux (CHF) prediction model based on the coupling of dynamic bubble simulation by Monte Carlo (MC) method and two-dimensional heat conduction model of the substrate by finite volume method. The model aims to predict the transient CHF value, estimate the dynamic heat flux and temperature distribution and evaluate various phenomena of bubble behaviors during transient boiling heat transfer process under exponentially escalating heat power input. The dynamic bubble simulation is performed by modeling and tracking bubble nucleation, bubble growth, bubble departure and bubble coalescence procedures of individual bubbles in real time based on simplified fundamental bubble parameters including nucleation site density (NSD), bubble departure diameter, bubble growth and waiting time. The heat flux partitioning model was used to evaluate different heat fluxes based on the classification of microlayer and dry spot regions. According to the dynamic heat flux boundary due to dynamic bubble behavior and exponentially escalating heat input, the thermal conductivity model was coupled to feed back the wall temperature distribution for further updates and simulation of dynamic bubble behavior. Numerical simulation results showed good agreement with transient flow boiling experimental results with escalating periods ranging from 500 ms to 5 ms, and the results showed the trend that the transient CHF value increases with decreasing escalating period as observed in experiments. Sensitivity analysis of input bubble parameters was performed and showed that the model is more sensitive to bubble departure diameter and bubble waiting time.

关键词： Transient CHF Transient boiling heat transfer Exponentially escalating period Dynamic bubble simulation Model coupling

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Land use change monitoring in Angkor Wat based on Tiangong-2 wide band imaging data

Land use change monitoring in Angkor Wat based on Tiangong-2...

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Tiangong-2 Remote Sensing Application Conference on Technology, Method and Application

作者： peng, shuwen Xi, Xiaohuan Wang, Cheng Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences Beijing100094 China University of Chinese Academy of Sciences Beijing100049 China

ISBN: (纸本)9789811335006

Angkor Wat is one of the most important archaeological sites in the world. However, due to its changes in natural environment and human activities, the Angkor Wat and its surrounding environment are facing great challenges. We select the data of Tiangong-2 Wide-band Imaging Spectrometer in 2017 and 2018 and to obtain the land use in Angkor area with the use of the maximum likelihood method. By analyzing the change information within one year, the monitoring application of the Angkor Wat and its surroundings is carried out. The results show that the overall accuracy is about 82.7% and the urbanization and tourism blowout have caused the over-exploitation of the resources of Angkor Wat and its ecological imbalance. The area of forest greatly reduced and was converted into urban and agricultural land;the agricultural land increased greatly, and it has continued to expand to the Angkor heritage area. The urban area around the heritage has increased. Tiangong-2 Wide-band Imaging Spectrometer is capable for land cover classification, and can provide important information to support the protection and sustainable development of various heritages. © Springer Nature Singapore Pte Ltd. 2019.

关键词： Land use

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A DSC method to determine temperature uniformity in BOPA annealing oven at transverse direction 73

A DSC method to determine temperature uniformity in BOPA ann...

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73rd Annual Technical Conference and Exhibition of the Society of Plastics Engineers, SPE ANTEC Orlando 2015

作者： Liu, Huiju Huang, Jianfeng peng, shuwen Resins and Chemicals Honeywell Technology Solution-China Shanghai201203 China

A DSC method was demonstrated to determine the temperature uniformity at transverse direction in BOPA annealing oven by utilizing the existence of small endothermic peak before the melting of alpha-form (221 ° C)... 详细信息

ISBN: (纸本)9780985011277

关键词： Ovens

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Biocompatible CuS-based nanoplatforms for efficient photothermal therapy and chemotherapy in vivo

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BIOMATERIALS SCIENCE 2017年第3期5卷 475-484页

作者： peng, shuwen He, Yuanyuan Er, Murat Sheng, Yuanzhi Gu, Yueqing Chen, Haiyan China Pharmaceut Univ Sch Engn Dept Biomed Engn State Key Lab Nat Med 24 Tongjia Lane Nanjing 210009 Jiangsu Peoples R China

Near-infrared (NIR) photothermal therapy (PTT) is a new approach to ablate cancer without affecting normal tissues. A pivotal concern of PPT is to develop photo-responsive agents with high biocompatibility as well as effective photothermal conversion efficiency. Copper sulfide (CuS) nanoparticles prepared are characterized by their low synthesis cost, wide NIR absorption range, good biocompatibility and favorable NIR photothermal conversion efficiency. CuS nanoparticles were then coated with mesoporous silicon dioxide (SiO2) by the Stober method, and further loaded with anticancer drug doxorubicin (DOX). The nanocomposites obtained were named CuS@MSN-DOX. The infrared thermal imaging of CuS@MSN-DOX demonstrated its favorable photothermal efficacy. The potential of CuS@MSN-DOX utilized as a multifunctional platform for combined PPT and chemotherapy was exploited both at the cell level and in a mice model. The result demonstrated that CuS@MSN-DOX was endowed with the synergistic effect of chemo-photothermal therapy, which confirmed that it is a promising candidate for combined therapy of cancer.

关键词： Sulfur compounds

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A large-scale group consensus decision-making method based on historical data in dynamic social networks

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INFORMATION SCIENCES 2025年 713卷

作者： peng, Juanjuan Pan, Liming Xue, shuwen Long, Qingqi Zhejiang Univ Finance & Econ Sch Management Hangzhou 310018 Peoples R China

In large-scale group decision-making (LSGDM) problems, clustering and feedback mechanisms play crucial roles in the consensus-building process. This study focuses on LSGDM problems that incorporate historical data in dynamic social networks and introduces a novel consensus decision-making method. First, we define a picture fuzzy linguistic Euclidean distance metric, which effectively quantifies the distance between picture fuzzy linguistic information, providing a robust quantitative tool for related research. Second, we constructed a hybrid trust-based dynamic social network that enables decision-makers (DMs) to interact closely based on both trust relationships and preference similarities. This approach overcomes the limitations of existing studies that consider only trust relationships when constructing hybrid trust social networks. Additionally, we propose a novel clustering method that integrates hybrid trust networks and historical data. Furthermore, we address the identification and management of noncooperative behavior within the consensus feedback mechanism to enhance the efficiency of group consensus. Finally, a high-speed rail construction site selection problem is presented as a case study to demonstrate the effectiveness and superiority of the proposed method.

关键词： Large-scale group consensus decision-making Picture fuzzy linguistic term sets Noncooperative behavior identification and management Dynamic social network Historical data

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表皮生长因子受体-酪氨酸激酶抑制剂联合化疗对非小细胞肺癌患者表皮生长因子受体基因突变的影响

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中国当代医药 2025年第7期32卷 75-78,83页

作者：曾乾彭述文施敏钟新云龙瀛李晓斌宜春学院第一附属医院肿瘤科江西宜春336100

目的探究非小细胞肺癌(NSCLC)患者应用表皮生长因子受体(EGFR)-酪氨酸激酶抑制剂(TKI)与化疗对其EGFR基因突变的影响。方法回顾性分析2022年1月1日至2024年1月1日宜春学院第一附属医院收治的60例NSCLC患者的临床资料,按治疗方法不同分... 详细信息

目的探究非小细胞肺癌(NSCLC)患者应用表皮生长因子受体(EGFR)-酪氨酸激酶抑制剂(TKI)与化疗对其EGFR基因突变的影响。方法回顾性分析2022年1月1日至2024年1月1日宜春学院第一附属医院收治的60例NSCLC患者的临床资料,按治疗方法不同分为对照组(30例)与研究组(30例)。对照组给予ERFR-TKI治疗,研究组在此基础上联合化疗,比较两组的临床疗效、肺功能、肿瘤标志物、机体功能状态[Kamofsky功能状态评分(KPS)]、不良反应、EGER基因耐药位点T790M突变情况。结果研究组的疾病控制率高于对照组,治疗后用力肺活量及第1秒用力呼气容积均高于对照组,血清癌胚抗原、糖类抗原125水平均低于对照组,KPS评分、EGFR基因耐药位点T790M突变发生率低于对照组,差异有统计学意义(P<0.05)。两组患者的不良反应发生等级比较,差异无统计学意义(P>0.05)。结论NSCLC患者采用EGFR-TKI联合化疗治疗,效果显著,可有效改善患者肺功能、肿瘤标志物水平,提升机体功能状态,减少EGER基因突变情况的发生,且较为安全。

关键词：非小细胞肺癌化疗表皮生长因子受体-酪氨酸激酶抑制剂表皮生长因子受体基因突变

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