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Continual Reinforcement Learning for Intelligent AgriculturalManagement under Climate Changes

Computers, Materials and Continua 2024年第1期81卷 1319-1336页

作者： Wang, Zhaoan Jha, Kishlay Xiao, shaoping Department of Mechanical Engineering Iowa Technology Institute University of Iowa Iowa City IA 52242 United States Department of Electrical and Computer Engineering University of Iowa Iowa City IA 52242 United States

Climate change poses significant challenges to agricultural management, particularly in adapting to extreme weather conditions that impact agricultural production. Existing works with traditional Reinforcement Learning (RL) methods often falter under such extreme conditions. To address this challenge, our study introduces a novel approach by integrating Continual Learning (CL) with RL to form Continual Reinforcement Learning (CRL), enhancing the adaptability of agricultural management strategies. Leveraging the Gym-DSSAT simulation environment, our research enables RL agents to learn optimal fertilization strategies based on variable weather conditions. By incorporating CL algorithms, such as Elastic Weight Consolidation (EWC), with established RL techniques like Deep Q-Networks (DQN), we developed a framework in which agents can learn and retain knowledge across diverse weather scenarios. The CRL approach was tested under climate variability to assess the robustness and adaptability of the induced policies, particularly under extreme weather events like severe droughts. Our results showed that continually learned policies exhibited superior adaptability and performance compared to optimal policies learned through the conventional RL methods, especially in challenging conditions of reduced rainfall and increased temperatures. This pioneering work, which combines CL with RL to generate adaptive policies for agricultural management, is expected to make significant advancements in precision agriculture in the era of climate change. © 2024 The Authors. Published by Tech Science Press.

关键词： Deep reinforcement learning

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巴郎口水电站土石坝填料工程特性试验分析

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工程地质学报 2015年第6期23卷 1182-1188页

作者：杨绍平符文熹四川水利职业技术学院资源环境工程系成都611231 四川大学水利水电学院成都610065

位于大渡河一级支流上的巴郎口水电站为闸坝引水式。考虑到砂卵石填筑料中粒径小于5mm的P5含量偏高而影响坝体稳定性,对厂房边坡砂卵石填筑料开展了碾压试验。根据现场密度及含水量测试、场地沉降观测等,确定合适的铺层厚度为97cm。并... 详细信息

位于大渡河一级支流上的巴郎口水电站为闸坝引水式。考虑到砂卵石填筑料中粒径小于5mm的P5含量偏高而影响坝体稳定性,对厂房边坡砂卵石填筑料开展了碾压试验。根据现场密度及含水量测试、场地沉降观测等,确定合适的铺层厚度为97cm。并取坝体填筑料在室内进行了颗分、击实、渗透和大三轴剪切试验。颗分试验表明填筑料级配良好,满足土石坝设计要求;击实试验得到填筑料的最优含水量和最大干密度分别为5.32%、2.42g·cm^(-3);渗透试验测得砂卵石平均渗透系数为2.422×10^(-2)cm·s^(-1);大型三轴试验获得砂卵石强度参数为φ=37.711°、c=0。结合现场碾压试验和室内试验成果,还对巴郎口水电站土石坝坝体进行了渗流稳定计算,复核了巴郎口水电站土石坝坝体的沉降、应力、渗流和稳定性等,为土石坝坝体的长期安全运行提供了重要依据。

关键词：土石坝填筑料碾压试验室内试验稳定性

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Improvement of the conversion efficiency of Mg_(3)Sb_(2)thermoelectric devices through optimizing the resistivity of the MgSbNi barrier layer

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Journal of Materials Science & Technology 2024年第1期168卷 208-214页

作者： Huimin Zhang Yachao Wang Zuhair A.Munir Yongzhong Zhang Wenhao Fan shaoping Chen College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan030024China Capital Aerospace Machinery Company Beijing100076China Department of Material Science and Engineering University of CaliforniaDavisCalifornia95616United States of America College of Physics and Optoelectronics Taiyuan University of TechnologyTaiyuan030024China Instrumental Analysis Center of Taiyuan University of Technology Taiyuan030024China

Mg_(3)Sb_(2)-based thermoelectric materials have been the focus of widespread investigations as promising candidates for the harvesting of waste *** stability and service performance are key points for the commercial applications of these *** utilized Mg_(4.3)Sb_(3)Ni as a barrier layer to improve the thermal stability of Mg 3 Sb 2-based ***,its intrinsic high resistivity contributed nega-tively to the desired performance of the *** this work,we investigated two other Mg-Sb-Ni ternary phases,MgSbNi and MgSbNi_(2),as new barrier layer materials to connect with Mg_(3.2)Sb_(2)Y_(0.05).The results show that the efficiency of the Mg_(1.2)SbNi/Mg_(3.2)Sb_(2)Y_(0.05)/Mg_(1.2)SbNi joint is increased by 33%relative to the higher Mg-content barriers due to lower *** system exhibited good interfacial compatibility and showed little change with aging at 673 K for 20 days.

关键词： Mg_(3)Sb_(2) Mg_(1.2)SbNi Barrier layer Conversion efficiency

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Dynamically updated digital twin for prognostics and health management:Application in permanent magnet synchronous motor

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Chinese Journal of Aeronautics 2024年第6期37卷 244-261页

作者： Haoyu GUO shaoping WANG Jian SHI Tengfei MA Giorgio GUGLIERI Rujun JIA Fausto LIZZIO School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China Tianmushan Laboratory Hangzhou 310023China Department of Mechanical and Aerospace Engineering Polytechnic University of TurinTurin 10129Italy Beihang Ningbo Research Institute Ningbo 315800China

Current research on Digital Twin(DT)based Prognostics and Health Management(PHM)focuses on establishment of DT through integration of real-time data from various sources to facilitate comprehensive product monitoring and health ***,there still exist gaps in the seamless integration of DT and PHM,as well as in the development of DT multi-field coupling modeling and its dynamic update *** the product experiences long-period degradation under load spectrum,it is challenging to describe the dynamic evolution of the health status and degradation progression *** addition,DT update algorithms are difficult to be integrated simultaneously by current *** paper proposes an innovative dual loop DT based PHM framework,in which the first loop establishes the basic dynamic DT with multi-filed coupling,and the second loop implements the PHM and the abnormal detection to provide the interaction between the dual loops through updating *** proposed method pays attention to the internal state changes with degradation and interactive mapping with dynamic parameter ***,the Independence Principle for the abnormal detection is proposed to refine the theory of *** at the first loop focus on accurate modeling of multi-field coupling,while the events at the second loop focus on real-time occurrence of anomalies and the product degradation *** interaction and collaboration between different loop models are also ***,the Permanent Magnet Synchronous Motor(PMSM)is used to verify the proposed *** results show that the modeling method proposed can accurately track the lifecycle performance changes of the entity and carry out remaining life prediction and health management effectively.

关键词： Digital Twin(DT) Dynamic Update Independence Principle Multi-field Coupling Permanent Magnet Synchronous Motor(PMSM) Prognostics and Health Management(PHM)

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Adhesive hydrogel interface for enhanced epidermal signal

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Science China Technological Sciences 2024年第10期67卷 3136-3151页

作者： SHI XinLei YU Hui TANG ZiQing LU shaoping YOU Min YIN HaiYan CHEN Qiang Wenzhou Institute University of Chinese Academy of Sciences Joint Research Centre on Medicine The Affiliated Xiangshan Hospital of Wenzhou Medical University

This paper presents a discussion on the method, mechanism, and application of adhesive hydrogel in enhancing epidermal signal,focusing on the interface between hydrogel and skin. Due to its excellent conductivity and high adaptability to the skin, the hydrogel is exceptionally suitable for detecting human-machine interfaces, particularly epidermal electromyographic ***, the detection of the high epidermal signal is hindered by the gap and low adhesion between hydrogel and skin. This paper addresses these challenges by introducing approaches to reduce the interface gap and increase interface adhesion, thereby enabling the development of hydrogel-based epidermal signal detection arrays with enhanced resolution and detection performance.

关键词： adhesive hydrogel hydrogel electrodes epidermal signal interfacial adhesion

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漂浮植物塘处理农村分散生活污水的强化措施研究

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环境污染与防治 2012年第6期34卷 16-22页

作者：杨少平李田同济大学污染控制与资源化研究国家重点实验室上海200092

利用漂浮植物与园沟宅河构建漂浮植物塘,配合化粪池处理农村分散生活污水,对改善水乡地区农村水环境质量具有重要意义。针对自然条件下的漂浮植物塘对NH4+-N等污染物的去除速率较低的局限,考察了曝气和搅拌等人工强化措施对提高漂浮植... 详细信息

利用漂浮植物与园沟宅河构建漂浮植物塘,配合化粪池处理农村分散生活污水,对改善水乡地区农村水环境质量具有重要意义。针对自然条件下的漂浮植物塘对NH4+-N等污染物的去除速率较低的局限,考察了曝气和搅拌等人工强化措施对提高漂浮植物塘净化效果的作用。结果表明:(1)曝气和搅拌可显著提高模拟漂浮植物塘中NH4+-N的去除率,但是不能改善TN的去除效果。(2)只要保证一定的DO,曝气方式对NH4+-N的去除效果影响不大。(3)模拟化粪池出水以接近连续流方式进入模拟漂浮植物塘,在平均DO大于2mg/L、水温20℃左右的条件下,停留时间为7d,NH4+-N能达到良好的硝化效果,持续运行没有发生NH4+-N积累。进水NH4+-N平均负荷为1.6g/(m2.d)下,曝气模拟漂浮植物塘出水NH4+-N平均值均可达到《地表水环境质量标准》(GB3838—2002)中Ⅴ类标准(2.0mg/L)。

关键词：漂浮植物塘河道污染农村分散生活污水 NH4+N曝气

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Effects of Rosa roxburghii&edible fungus fermentation broth on immune response and gut microbiota in immunosuppressed mice

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Food Science and Human Wellness 2024年第1期13卷 154-165页

作者： Dechang Xu Jielun Hu Yadong Zhong Yanli Zhang Wenting Liu shaoping Nie Mingyong Xie State Key Laboratory of Food Science and Technology China-Canada Joint Laboratory of Food Science and Technology(Nanchang)Key Laboratory of Bioactive Polysaccharides of Jiangxi ProvinceNanchang UniversityNanchang 330047China

With the rise of probiotics fermentation in food industry,fermented foods have attracted worldwide *** this study,protective effects of Rosa roxburghii&edible fungus fermentation broth(REFB)on immune function and gut health in Cyclophosphamide induced immunosuppressed mice were *** showed that REFB could improve the immune organ index,and promote the proliferation and differentiation of splenic T *** addition,it attenuated intestinal mucosal damage and improved intestinal cellular *** administration also up-regulated the expression of IL-4,INF-γ,TNF-α,T-bet and GATA-3 mRNA in small ***,administration of REFB modulated gut microbiota composition and increased the relative abundance of beneficial genus,such as *** also increased the production of fecal short-chain fatty *** indicate that REFB has the potential to improve immunity,alleviate intestinal injury and regulate gut microbiota in immunosuppressed mice.

关键词： Fermented foods Immunosuppressed mice Immune response Gut microbiota Short-chain fatty acids

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Legumain-triggered aggregable gold nanoparticles for enhanced intratumoral retention

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Chinese Chemical Letters 2024年第7期35卷 388-393页

作者： Zhi Li Wenpei Li shaoping Jiang Chuan Hu Yuanyu Huang Maxim Shevtsov Huile Gao Shaobo Ruan Advanced Research Institute of Multidisciplinary Sciences School of Life ScienceBeijing Institute of TechnologyBeijing 100081China Key Laboratory of Drug Targeting and Drug Delivery System West China School of PharmacySichuan UniversityChengdu 610041China Institute of Cytology of Russian Academy of Sciences(RAS) St.Petersburg 194064Russia

Insufficient intratumoral retention of nanomedicines remains the major challenge for broad implementation in clinical ***,we proposed a legumain-triggered aggregable gold nanoparticle(GNP)delivery platform(GNPs-A&C).GNPs-A&C could form intratumoral or intracellular aggregates in response to the overexpressed *** aggregates with size increase not only could reduce back-flow from interstitial space to peripheral bloodstream but also could restrict the cellular exocytosis,leading to enhanced intratumoral *** vitro studies demonstrated that GNPs-A&C possessed an excellent legumain responsiveness and the increased size was closely relevant with legumain *** vivo studies demonstrated GNPs-A&C possessed slower clearance rate and much higher intratumoral retention within legumain-overexpressed tumor compared to non-aggregable NPs,regardless of intravenous or intratumoral *** importantly,this delivery platform significantly improved the chemotherapeutic effect of doxorubicin(DOX)towards subcutaneous xenograft C6 *** effectiveness of this stimulus-responsive aggregable delivery system provides a thinking for designing more intelligent size-tunable nanomedicine that can substantially improve intratumoral retention.

关键词： Legumain Size-tunable Enhanced retention Stimulus-responsive Nanomedicine

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Glioma-derived ANXA1 suppresses the immune response to TLR3 ligands by promoting an anti-inflammatory tumor microenvironment

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Cellular & Molecular Immunology 2024年第1期21卷 47-59页

作者： Yu Zheng Haihui Jiang Naixue yang shaoping Shen Daosheng Huang Lemei Jia Jing Ling Longchen Xu Mingxiao Li Kefu Yu Xiaohui Ren Yong Cui Xun Lan Song Lin Xin Lin Institute for Immunology and School of Medicine Tsinghua UniversityBeijing100084China Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityChina.National Clinical Research Center for Neurological DiseasesCenter of Brain TumorBeijing Institute for Brain Disorders and Beijing Key Laboratory of Brain TumorBeijing100070China Department of Neurosurgery Peking University Third HospitalPeking UniversityBeijing100191China Tsinghua-Peking Center for Life Sciences Beijing100084China

A highly immunosuppressive tumor microenvironment(TME)and the presence of the blood‒brain barrier are the two major obstacles to eliciting an effective immune response in patients with high-grade glioma(HGG).Here,we tried to enhance the local innate immune response in relapsed HGG by intracranially injecting poly(I:C)to establish a robust antitumor immune response in this registered clinical trial(NCT03392545).During the follow-up,12/27(44.4%)patients who achieved tumor control concomitant with survival benefit were regarded as responders in our *** found that the T-cell receptor(TCR)repertoire in the TME was reshaped after poly(I:C)*** on the RNA-seq analysis of tumor samples,the expression of annexin A1(ANXA1)was significantly upregulated in the tumor cells of nonresponders,which was further validated at the protein *** vitro and in vivo experiments showed that ANXA1 could induce the production of M2-like macrophages and microglia via its surface receptor formyl peptide receptor 1(FPR1)to establish a Treg cell-driven immunosuppressive TME and suppress the antitumor immune response facilitated by poly(I:C).The ANXA1/FPR1 signaling axis can inhibit the innate immune response of glioma patients by promoting an anti-inflammatory and Treg-driven ***,ANXA1 could serve as a reliable predictor of response to poly(I:C),with a notable predictive accuracy rate of 92.3%.In light of these notable findings,this study unveils a new perspective of immunotherapy for gliomas.

关键词： glioma ANXA1 TLR3 poly(I:C) immunotherapy

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Preliminary Results of the Seismicity Monitoring Experiment around the 2019 Mw5.4 Earthquake Epicenter in the Central South China Sea Basin

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Journal of Earth Science 2024年第1期35卷 212-220页

作者： Wenfei Gong Aiguo Ruan Xiongwei Niu Zhenjie Wang Pingchuan Tan Xiaodong Wei Wei Wang Zhengyi Tong Liqun Cheng Fansheng Kong shaoping Lu Jianke Fan Weiwei Ding Jinyao Gao Chunguo yang Jiabiao Li School of Oceanography Shanghai Jiaotong UniversityShanghai 200240China Key Laboratory of submarine Geosciences Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Zhejiang Earthquake Administration Hangzhou 310013China School of Earth Sciences Zhejiang UniversityHangzhou 310027China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China School of Earth Sciences and Engineering Sun Yat-sen UniversityZhuhai 519082China Institute of Oceanology Chinese Academy of SciencesQingdao 266071China

On September 5,2019,a moderate earthquake of Mw5.4 unexpectedly occurred in the apparently quiescent central basin of the South China *** immediately carried out a seismicity monitoring experiment around the epicenter by using broadband ocean bottom seismometers(OBS)for the following three scientific *** first is knowing the earthquake seismogenic mechanism,fault structure and further *** second is finding the role of the residual spreading ridge playing in earthquake processes and further revealing the deep structures of the ridge directional turning *** third is confirming the existence and significance of the so called“Zhongnan fault”.This paper reports the preliminary results of the first phase *** OBSs were deployed for seismicity monitoring with a duration of 288 days,but only three were ***-earthquakes were firstly detected by an automatic seismic phase picking algorithm and then were verified by analyzing their seismic phases and time-frequency characteristics in detail.A total of 21,68 and 89 microearthquakes were picked out from the three OBSs respectively within the distance of 30 *** dominant frequency of these micro-earthquakes is 12-15 Hz,indicating tectonic *** the first two months after the mainshock the seismicity was relatively stronger,and micro-earthquakes were still occurring occasionally till the end of observation,indicating the epicenter area is *** used Match&Locate method to locate 57 micro-earthquakes *** spatial distribution shows that the seismicity is developed mainly along the NE direction roughly parallel to the residual ridge with depth variations between 10-20 km.

关键词： South China Sea microseismic monitoring earthquakes fault broadband OBS

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