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农产品贸易与服务业耦合协调度分布动态与时空差异研究

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农业展望 2024年第5期20卷 112-122页

作者：牛磊刘建军杨华平长江大学经济与管理学院湖北荆州434023 湖北咸宁赤壁市第一中学湖北咸宁437399

农产品贸易与服务业的耦合发展是优化产业结构的客观要求,也是实现农业现代化的重要途径。基于2005—2020年中国31个省份(未包括港澳台地区)面板数据,运用耦合协调度模型、Dagum基尼系数、核密度函数与莫兰指数考察农产品贸易与服务业... 详细信息

农产品贸易与服务业的耦合发展是优化产业结构的客观要求,也是实现农业现代化的重要途径。基于2005—2020年中国31个省份(未包括港澳台地区)面板数据,运用耦合协调度模型、Dagum基尼系数、核密度函数与莫兰指数考察农产品贸易与服务业的耦合协调关系。研究发现:农产品贸易与服务业耦合协调度呈上升态势,但目前整体处于低水平耦合阶段,地区间耦合协调度从大到小依次为东部、东北部、中部和西部;农产品贸易和服务业耦合协调度总体空间差异呈扩大趋势,空间差异主要由区域间差异所引致;中国农产品贸易与服务业耦合协调度均丰在明显的空间集聚现象,大多数省份处于高—高集聚和低—低集聚。基于此,从完善农村基础设施建设、制定政策帮扶和优化调整产业结构以及整合区域资源等方面提出了推动农产品贸易与服务业高度耦合协调实现的政策建议。

关键词：农产品贸易服务业耦合协调 Dagum基尼系数莫兰指数时空差异

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Bronchial Fistula: Rare Complication of Treatment with Anlotinib

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中国肺癌杂志 2020年第10期23卷 858-865页

作者： Pengbo DENG Chengping HU Yuanyuan LI Liming CAO huaping yang Min LI Jian AN Juan JIANG Qihua GU Department of Respiratory Medicine Xiangya Lung Cancer Center Xiangya HospitalCentral South UniversityChangsha 410008China

Background and objective Anlotinib is a newly developed small molecule multiple receptor tyrosine kinase(RTK) inhibitor that was approved for the treatment of patients with lung cancer in China. We aim to report 3 cases of rare complication of anlotinib-bronchial fistula(BF) during the treatment of lung cancer patients and summarize the possible *** We collected three patients who developed BF due to anlotinib treatment, and conducted a search of Medline and Pub Med for medical literature published between 2018 and 2020 using the following search terms: "anlotinib," "lung cancer," and "fistula."Results Our literature search produced two case reports(three patients) which, in addition to our three patients. We collated the patients’ clinical characteristics including demographic information, cancer type, imaging features, treatment received, risk factors for anlotinib related BF, and treatment-related outcomes. The six patients shared some common characteristics: advanced age, male, concurrent infection symptoms, diabetes mellitus(DM), advanced squamous cell and small cell lung cancers, centrally located tumors, tumor measuring ≥5 cm in longest diameter, and newly formed tumor cavitation after multi-line treatment especially after receiving radiotherapy. Fistula types included broncho-pericardial fistula, broncho-pleural fistula, and esophagotracheobronchial fistula. Six patients all died within 6 *** Although anlotinib is relatively safe, it is still necessary to pay attention to the occurrence of BF, a rare treatment side effect that threatens the quality of life and overall survival of patients. Anlotinib, therefore, requires selective use and close observation of high-risk patients.

关键词： lung cancer fistula

Spatial impact of digital finance on carbon productivity

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Geoscience Frontiers 2024年第3期15卷 358-372页

作者： huaping Sun Tingting Chen Christoph Nedopil Wang School of Finance and Economics Jiangsu UniversityZhenjiangChina School of Economics and Management University of Science and Technology BeijingBeijingChina Fanhai International School of Finance Fudan UniversityShanghaiChina

Low carbon productivity has been identified as a key direction for China’s future *** an important driving force for economic growth,the question of whether digital finance that is reliant on digital technology can support the development of a low-carbon urban economy remains *** on the carbon productivity measured by panel data from 201 cities for the period 2011-2020,this study applies the spatial Dubin model and threshold regression model to explore the impact of digital finance on carbon productivity,yielding the following key ***,the spatial distribution heterogeneity of carbon productivity in China’s eastern region is higher than that in the western region,and both productivity and digital finance are characterized by high(low)-high(low)dotted spatial ***,digital finance can significantly improve carbon productivity via two transmission channels:the human capital and marketization *** the same time,digital finance exerts a spatial spillover effect on carbon productivity,and rising local digital finance levels will increase carbon productivity in neighboring *** analysis indicates that the spillover effect of digital finance in urban agglomerations and eastern regions is more ***,fixed-asset investment has a positive nonlinear moderating effect on digital finance,thus improving carbon *** the per capita investment in fixed assets does not exceed 682.73 yuan,digital finance exerts only a limit pulling effect on carbon productivity;when it is higher than this value,the pulling effect is intensified.

关键词： Digital finance Carbon productivity Spatial spillover effect Fixed-asset investment Spatial heterogeneity

Skill enhancement learning with knowledge distillation

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Science China(Information Sciences) 2024年第8期67卷 206-220页

作者： Naijun LIU Fuchun SUN Bin FANG huaping LIU Department of Computer Science and Technology Tsinghua University

Skill learning through reinforcement learning has significantly progressed in recent years. However, it often struggles to efficiently find optimal or near-optimal policies due to the inherent trial-and-error exploration in reinforcement learning. Although algorithms have been proposed to enhance skill learning efficacy, there is still much room for improvement in terms of skill learning performance and training stability. In this paper, we propose an algorithm called skill enhancement learning with knowledge distillation(SELKD), which integrates multiple actors and multiple critics for skill learning. SELKD employs knowledge distillation to establish a mutual learning mechanism among actors. To mitigate critic overestimation bias,we introduce a novel target value calculation method. We also perform theoretical analysis to ensure the convergence of SELKD. Finally, experiments are conducted on several continuous control tasks, illustrating the effectiveness of the proposed algorithm.

关键词： skill learning enhancement learning reinforcement learning knowledge distillation

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不同材料绝缘子串在风荷载下的数值模拟

成都大学学报（自然科学版） 2024年第2期43卷 166-171页

作者：丁顺利闵光云邵俊虎杨华平蔡萌琦周林抒成都大学机械工程学院四川成都610106 清华四川能源互联网研究院四川成都610299 中山大学中法核工程与技术学院广东珠海519082 成都大学建筑与土木工程学院四川成都610106 国网四川综合能源服务有限公司四川成都610031

利用ABAQUS有限元软件建立三档覆冰八分裂导线的数值模型,模拟研究输电线路在不同风荷载下的舞动.基于导线动力特性和舞动特征,分析玻璃、环氧树脂及陶瓷等不同材料绝缘子串对导线舞动的影响,获得特征线路段的舞动响应时程分析、频谱分... 详细信息

利用ABAQUS有限元软件建立三档覆冰八分裂导线的数值模型,模拟研究输电线路在不同风荷载下的舞动.基于导线动力特性和舞动特征,分析玻璃、环氧树脂及陶瓷等不同材料绝缘子串对导线舞动的影响,获得特征线路段的舞动响应时程分析、频谱分析与轨迹分析.结合数值模拟结果,进一步对线路在不同风速的风荷载作用下的风偏响应进行时程分析,比较不同材料的绝缘子串对风偏起振现象的抑制效果.结果表明,绝缘子串材料的不同对导线舞动影响较小,对导线风偏幅值起不到抑制效果,因此,在输电线路实际工程应用中,应结合工程造价和防舞性能等因素综合考量选择绝缘子串.

关键词：绝缘子串不同材料风荷载舞动数值模拟

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Preparation of biomass-derived carbon loaded with MnO_(2) as lithium-ion battery anode for improving its reversible capacity and cycling performance

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Frontiers of Chemical Science and Engineering 2024年第1期18卷 107-120页

作者： Likai Zhu huaping Lin Wenli Zhang Qinhui Wang Yefeng Zhou National&Local United Engineering Research Centre for Chemical Process Simulation and Intensification Chemical Process Simulation and Optimization Engineering Research Center of Ministry of EducationXiangtan UniversityXiangtan 411100China Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006China State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China

Biomass-derived carbon materials for lithiumion batteries emerge as one of the most promising anodes from sustainable ***,improving the reversible capacity and cycling performance remains a long-standing *** combining the benefits of K2CO_(3) activation and KMnO_(4) hydrothermal treatment,this work proposes a two-step activation method to load MnO_(2) charge transfer onto biomass-derived carbon(KAC@MnO_(2)).Comprehensive analysis reveals that KAC@MnO_(2) has a micro-mesoporous coexistence structure and uniform surface distribution of MnO_(2),thus providing an improved electrochemical ***,KAC@MnO_(2) exhibits an initial chargedischarge capacity of 847.3/1813.2 mAh·g^(-1) at 0.2 A·g^(-1),which is significantly higher than that of direct pyrolysis carbon and K2CO_(3) activated carbon,***,the KAC@MnO_(2) maintains a reversible capacity of 652.6 mAh·g^(-1) after 100 *** at a high current density of 1.0 A·g^(-1),KAC@MnO_(2) still exhibits excellent long-term cycling stability and maintains a stable reversible capacity of 306.7 mAh·g^(-1) after 500 *** with reported biochar anode materials,the KAC@MnO_(2) prepared in this work shows superior reversible capacity and cycling ***,the Li+insertion and de-insertion mechanisms are verified by ex situ X-ray diffraction analysis during the chargedischarge process,helping us better understand the energy storage mechanism of KAC@MnO_(2).

关键词： biomass-derived carbon MnO_(2) lithium-ion batteries anode material high reversible capacity

Data-driven electrical resistance tomography for robotic large-area tactile sensing

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Science China(Information Sciences) 2024年第9期67卷 336-337页

作者： Wendong ZHENG huaping LIU Xiaofeng LIU Fuchun SUN School of Electrical Engineering and Automation Tianjin University of Technology Department of Computer Science and Technology Tsinghua University Key Laboratory of Maritime Intelligent Cyberspace Technology (Hohai University) Ministry of Education

Tactile sensing plays a crucial role in enabling robots to safely interact with objects in dynamic environments [1].Given that potential physical contact can occur at any location during robot interaction, there is a ... 详细信息

关键词： Robot applications

数值模拟填料含量对Cu/PTFE复合材料摩擦性能的影响

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复合材料学报 2015年第1期32卷 39-46页

作者：解挺杨华平江凯合肥工业大学摩擦学研究所合肥230009

为了探讨填料含量对Cu/聚四氟乙烯(PTFE)复合材料摩擦磨损的影响,运用二维颗粒流程序(PFC2D)对PTFE基复合材料在不同含量的Cu颗粒填充条件下与45#钢的摩擦磨损过程进行数值模拟分析,主要研究了Cu/PTFE复合材料的摩擦转移及磨损问题。模... 详细信息

为了探讨填料含量对Cu/聚四氟乙烯(PTFE)复合材料摩擦磨损的影响,运用二维颗粒流程序(PFC2D)对PTFE基复合材料在不同含量的Cu颗粒填充条件下与45#钢的摩擦磨损过程进行数值模拟分析,主要研究了Cu/PTFE复合材料的摩擦转移及磨损问题。模拟结果表明:Cu/PTFE复合材料与45#钢组成摩擦副时,会在45#钢表面形成一层转移颗粒层,转移颗粒层的形成能够有效地降低PTFE基复合材料的磨损。Cu颗粒的添加一方面可以通过自身转移的"钉扎"作用促进转移颗粒层的形成,另一方面由于提高了复合材料的整体强度,又对转移颗粒层的形成产生了一定的抑制作用。所以添加适量的Cu有利于转移颗粒层的形成,但Cu含量过高时其作用又会降低。Cu颗粒的加入降低了PTFE基复合材料的磨损量,且随着Cu含量的增加减磨效果增强。在Cu颗粒的质量分数为50%时,PTFE基复合材料的磨损颗粒数较纯PTFE的减少了近一半。

关键词：复合材料填料数值模拟磨损转移

Insights into Nano-and Micro-Structured Scaffolds for Advanced Electrochemical Energy Storage

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Nano-Micro Letters 2024年第7期16卷 187-230页

作者： Jiajia Qiu Yu Duan Shaoyuan Li huaping Zhao Wenhui Ma Weidong Shi Yong Lei Fachgebiet Angewandte Nanophysik Institut Für Physik and IMN MacroNanoTechnische Universit.t Ilmenau98693 IlmenauGermany Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093People’s Republic of China School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 212013People’s Republic of China School of Science and Technology Pu’er UniversityPu’er 665000People’s Republic of China

Adopting a nano-and micro-structuring approach to fully unleashing the genuine potential of electrode active material benefits in-depth understandings and research progress toward higher energy density electrochemical energy stor-age devices at all technology readiness *** to various challenging issues,especially limited stability,nano-and micro-structured(NMS)electrodes undergo fast electrochemical performance *** emerging NMS scaffold design is a pivotal aspect of many electrodes as it endows them with both robustness and electrochemical performance enhancement,even though it only occupies comple-mentary and facilitating components for the main ***,extensive efforts are urgently needed toward optimizing the stereoscopic geometrical design of NMS scaffolds to minimize the volume ratio and maximize their functionality to fulfill the ever-increasing dependency and desire for energy power source *** review will aim at highlighting these NMS scaffold design strategies,summariz-ing their corresponding strengths and challenges,and thereby outlining the potential solutions to resolve these challenges,design principles,and key perspectives for future research in this ***,this review will be one of the earliest reviews from this viewpoint.

关键词： Nano-and micro-structured Interconnected porous Scaffolds Electrode design Electrochemical energy storage