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Advances in Manufacturing 2024年第1期12卷 94-107页

作者： Yan Liu Qiu Tang Xin-cheng tian School of Control Science and Engineering Shandong UniversityJinan250061People’s Republic of China Engineering Research Center of Intelligent Unmanned System Ministry of EducationJinan250061People’s Republic of China School of Mechanical and Electronic Engineering Shandong Jianzhu UniversityJinan250101People’s Republic of China

The automatic cutting of intersecting pipes is a challenging task in *** improved automation and accuracy,this paper proposes a model-driven path planning approach for the robotic plasma cutting of a branch pipe with a single ***,it summarizes the intersection forms and introduces a dual-pipe intersection *** on this model,the moving three-plane structure(a description unit of the geometric characteristics of the intersecting curve)is constructed,and a geometric model of the branch pipe with a single Y-groove is ***,a novel mathematical model for plasma radius and taper compensation is ***,the compensation model and groove model are integrated by establishing movable ***,to prevent collisions between the plasma torch and workpiece,the torch height is planned and a branch pipe-rotating scheme is *** the established models and moving frames,the planned path description of cutting robot is provided in this novel *** accuracy of the proposed method is verified by simulations and robotic cutting experiments.

关键词： Automatic groove cutting of intersecting pipes Model-driven robot path planning Plasma beam radius and taper compensation

Transformer-Based Cloud Detection Method for High-Resolution Remote Sensing Imagery

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Computers, Materials & Continua 2024年第7期80卷 661-678页

作者： Haotang Tan Song Sun tian cheng Xiyuan Shu Key Laboratory of GIS Application Research School of Geography and TourismChongqing Normal UniversityChongqing401331China College of Computer and Information Science Chongqing Normal UniversityChongqing401331China Department of Military Installations Army Logistics AcademyChongqing401331China

Cloud detection from satellite and drone imagery is crucial for applications such as weather forecasting and *** the limitations of conventional convolutional neural networks,we propose an innovative transformer-based *** method leverages transformers,which are adept at processing data sequences,to enhance cloud detection ***,we introduce a Cyclic Refinement Architecture that improves the resolution and quality of feature extraction,thereby aiding in the retention of critical details often lost during cloud *** extensive experimental validation shows that our approach significantly outperforms established models,excelling in high-resolution feature extraction and precise cloud *** integrating Positional Visual Transformers(PVT)with this architecture,our method advances high-resolution feature delineation and segmentation ***,our research offers a novel perspective for surmounting traditional challenges in cloud detection and contributes to the advancement of precise and dependable image analysis across various domains.

关键词： Cloud transformer image segmentation remotely sensed imagery pyramid vision transformer

Gut-targeted therapies for type 2 diabetes mellitus: A review

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World Journal of Clinical Cases 2024年第1期12卷 1-8页

作者： tian-cheng Xu Yun Liu Zhi Yu Bin Xu Key Laboratory of Acupuncture and Medicine Research of Ministry of Education Nanjing University of Chinese MedicineNanjing 210023Jiangsu ProvinceChina

Type 2 diabetes mellitus(T2DM)is a chronic metabolic disorder characterized by hyperglycemia and insulin *** global prevalence of T2DM has reached epidemic proportions,affecting approximately 463 million adults worldwide in *** treatments for T2DM include lifestyle modifications,oral antidiabetic agents,and insulin ***,these therapies may carry side effects and fail to achieve optimal glycemic control in some ***,there is a growing interest in the role of gut microbiota and more gut-targeted therapies in the management of *** gut microbiota,which refers to the community of microorganisms that inhabit the human gut,has been shown to play a crucial role in the regulation of glucose metabolism and insulin *** in gut microbiota composition and diversity have been observed in T2DM patients,with a reduction in beneficial bacteria and an increase in pathogenic *** dysbiosis may contribute to the pathogenesis of the disease by promoting inflammation and impairing gut barrier *** gut-targeted therapies have been developed to modulate the gut microbiota and improve glycemic control in *** potential approach is the use of probio-tics,which are live microorganisms that confer health benefits to the host when administered in adequate *** randomized controlled trials have demonstrated that certain probiotics,such as Lactobacillus and Bifidobacterium species,can improve glycemic control and insulin sensitivity in T2DM *** may include the production of short-chain fatty acids,the improvement of gut barrier function,and the reduction of *** gut-targeted therapy is fecal microbiota transplantation(FMT),which involves the transfer of fecal material from a healthy donor to a *** has been used successfully in the treatment of Clostridioides difficile infection and is now being investigated as a potential therapy for T2DM.A recent rand

关键词： Type 2 diabetes mellitus Gastroenterology Bacteria Implanted device

Rapid and stable calcium-looping solar thermochemical energy storage via co-doping binary sulfate and Al±Mn±Fe oxides

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Green Energy & Environment 2024年第8期9卷 1290-1305页

作者： Changjian Yuan Xianglei Liu Xinrui Wang Chao Song Hangbin Zheng cheng tian Ke Gao Nan Sun Zhixing Jiang Yimin Xuan Yulong Ding School of Energy and Power Engineering Nanjing University of Aeronautics and Astronautics Key Laboratory of Thermal Management and Energy Utilization of Aviation Vehicles Ministry of Industry and Information Technology Birmingham Centre for Energy Storage School of Chemical Engineering University of Birmingham

Solar thermochemical energy storage based on calcium looping（CaL） process is a promising technology for next-generation concentrated solar power（CSP） systems. However, conventional calcium carbonate（CaCO3） pellets suffer from slow reaction kinetics, poor stability, and low solar absorptance. Here, we successfully realized high power density and highly stable solar thermochemical energy storage/release by synergistically accelerating energy storage/release via binary sulfate and promoting cycle stability, mechanical strength, and solar absorptance via Al±Mn±Fe oxides. The energy storage density of proposed CaCO3pellets is still as high as 1455 kJ kg-1with only a slight decay rate of 4.91% over 100 cycles, which is higher than that of state-of-the-art pellets in the literature, in stark contrast to 69.9% of pure CaCO3pellets over 35cycles. Compared with pure CaCO3, the energy storage power density or decomposition rate is improved by 120% due to lower activation energy and promotion of Ca2+diffusion by binary sulfate. The energy release or carbonation rate rises by 10% because of high O2-transport ability of molten binary sulfate. Benefiting from fast energy storage/release rate and high solar absorptance, thermochemical energy storage efficiency is enhanced by more than 50% under direct solar irradiation. This work paves the way for application of direct solar thermochemical energy storage techniques via achieving fast energy storage/release rate, high energy density, good cyclic stability, and high solar absorptance simultaneously.

关键词： Calcium looping (CaL) Solar thermochemical Energy storage Binary sulfate Fast reaction kinetics

Thermal management by manipulating electromagnetic parameters

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Chinese Physics B 2024年第5期33卷 21-27页

作者：王云梁迪飞韩天成邓龙江 National Engineering Research Center of Electromagnetic Radiation Control Materials University of Electronic Science and Technology of ChinaChengdu 611731China Key Laboratory of Multi-spectral Absorbing Materials and Structures of Ministry of Education University of Electronic Science and Technology of ChinaChengdu 611731China

Electromagnetic absorbing materials may convert electromagnetic energy into heat energy and dissipate ***,in a high-power electromagnetic radiation environment,the temperature of the absorbing material rises significantly and even *** becomes critical to ensure electromagnetic absorption performance while minimizing temperature ***,we systematically study the coupling mechanism between the electromagnetic field and the temperature field when the absorbing material is irradiated by electromagnetic *** find out the influence of the constitutive parameters of the absorbing materials(including uniform and non-uniform)on the temperature ***,through a smart design,we achieve better absorption and lower temperature *** accuracy of the model is affirmed as simulation results aligned with theoretical *** work provides a new avenue to control the temperature distribution of absorbing materials.

关键词： multi-physics field electromagnetic-thermal coupling microwave absorption high power application

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诊断与异议:文学在福柯哲学中的批判作用

新疆大学学报（哲学社会科学版） 2024年第5期52卷 119-126页

作者：夏天成安徽大学哲学学院安徽合肥230039

文学在福柯哲学中起到了诊断与提出异议的批判性作用。福柯通过《堂吉诃德》等体现了文学对知识型的诊断作用,并通过萨德等人的作品进一步展现了文学冲击理性话语秩序的异议能力,这两个方面共同形成了一种关于我们自身的历史本体论的批... 详细信息

文学在福柯哲学中起到了诊断与提出异议的批判性作用。福柯通过《堂吉诃德》等体现了文学对知识型的诊断作用,并通过萨德等人的作品进一步展现了文学冲击理性话语秩序的异议能力,这两个方面共同形成了一种关于我们自身的历史本体论的批判态度,这种态度在福柯对波德莱尔的浪荡作风与现代性的关联考察中得到了最佳体现。福柯的这些文学评论大多基于一种历史考察,但是其真正的目的仍在于为当下的自我创造提供更多的可能性。

关键词：福柯文学哲学批判

深圳市2015~2021年雨源型河流水质时空变化及其对降雨的响应

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环境科学 2024年第2期45卷 780-791页

作者：韦必颖成建梅苏晓煜程天舜中国地质大学(武汉)环境学院武汉430078 广东省深圳生态环境监测中心站深圳518049 广东省深圳市水务规划设计院深圳518001

雨源型城市河流水容量偏小,缺乏动态补充水源,易受污染.基于深圳市2015~2021年全市(不含深汕)9大流域的21个水质指标数据和逐日降雨数据,利用单因子指数评价、综合污染指数、层次聚类分析和Pearson相关分析等方法,研究深圳市河流水质时... 详细信息

雨源型城市河流水容量偏小,缺乏动态补充水源,易受污染.基于深圳市2015~2021年全市(不含深汕)9大流域的21个水质指标数据和逐日降雨数据,利用单因子指数评价、综合污染指数、层次聚类分析和Pearson相关分析等方法,研究深圳市河流水质时空分布特征及特征污染物对降雨的响应关系.结果表明:①2015年全区大部分断面水质都是劣Ⅴ类水,2018年10月后河流水质总体得到大幅度改善,与2018年深圳市开展治水专项活动背景一致,到2021年约62%的断面水质达Ⅰ~Ⅲ类水标准;②深圳市(不含深汕)西部人口稠密地区的水质污染较东部更严重,河口和支流下游水质污染较上游更严重;③深圳市坪山河、龙岗河、茅洲河和深圳河的水质受降雨的影响显著;④深圳市河流的主要特征污染指标是DO、COD、BOD5、NH_(4)^(+)-N、TP、高锰酸盐指数、石油类和阴离子表面活性剂;对于坪山河和龙岗河,降雨使TP和NH_(4)^(+)-N指标浓度升高;对于茅洲河,降雨使TP和COD指标浓度升高;对于深圳河,降雨使COD、TP和NH_(4)^(+)-N指标浓度升高.以上结果能够揭示深圳市雨源型河流水质时空变化情况及其对降雨事件引发的非点源污染的响应关系,为深圳市打造更高品质水环境提供科学参考.

关键词：水质评价雨源型河流降雨时空分布深圳市

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义务教育可及性对农民工居留意愿的影响

华南农业大学学报（社会科学版） 2024年第1期23卷 48-62页

作者：王卓李天成华南农业大学经济管理学院广东广州510642 华南农业大学广东农村政策研究中心广东广州510642

利用2017年中国流动人口动态监测调查(CMDS)数据,结合地级及以上城市特征数据,以义务教育阶段子女随迁作为义务教育可及性的代理变量,研究了义务教育可及性对农民工居留意愿的影响。研究发现:义务教育可及性显著促进了农民工的居留意愿... 详细信息

利用2017年中国流动人口动态监测调查(CMDS)数据,结合地级及以上城市特征数据,以义务教育阶段子女随迁作为义务教育可及性的代理变量,研究了义务教育可及性对农民工居留意愿的影响。研究发现:义务教育可及性显著促进了农民工的居留意愿;社会融入是义务教育可及性影响农民工居留意愿的一个重要机制;义务教育可及性对农民工居留意愿的影响在有小学阶段子女、低学历和跨省流动农民工群体中更大;相对于超大特大城市和中小城市,义务教育可及性对在大城市居留的农民工影响更明显。

关键词：义务教育可及性基本公共服务城市化农民工市民化意愿

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基于多轴载荷投影构建轮辋双轴疲劳损伤模型

吉林大学学报（工学版） 2024年第1期54卷 99-104页

作者：王铁李旭东田程赵宏伟吉林大学机械与航空航天工程学院长春130022 中汽信息科技(天津)有限公司天津300300 中汽研汽车检验中心(天津)有限公司底盘试验研究部天津300300

针对轮辋疲劳试验载荷谱编制过程中损伤等价和试验加速的难点,结合轮辋结构自身特点,从损伤等效的角度对实际工况中轮辋承受的载荷进行了较为全面系统的分析,引入了多轴载荷投影的概念,构建了轮辋双轴疲劳损伤模型,在此基础上提出轮辋... 详细信息

针对轮辋疲劳试验载荷谱编制过程中损伤等价和试验加速的难点,结合轮辋结构自身特点,从损伤等效的角度对实际工况中轮辋承受的载荷进行了较为全面系统的分析,引入了多轴载荷投影的概念,构建了轮辋双轴疲劳损伤模型,在此基础上提出轮辋双轴疲劳试验载荷谱编制和试验加速的方法。在公共道路典型路面实车采集了约5000 km车轮轮辋时域数据,采用本文方法对获得的数据开展了轮辋双轴疲劳损伤的等效分析。结果表明:相较于单轴的轮辋径向疲劳试验和弯曲疲劳试验,本文提出的轮辋双轴疲劳试验方法在复现实际工况损伤方面具有显著的优越性。

关键词：车辆工程车轮轮辋双轴疲劳试验载荷谱多轴载荷投影

中国散裂中子源二期靶站关键部件辐照损伤模拟计算

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物理学报 2024年第9期73卷 46-57页

作者：曹嵩殷雯周斌胡志良沈飞易天成王松林梁天骄中国科学院高能物理研究所北京100049 中国科学院大学核科学与技术学院北京100049 粤港澳中子散射科学技术联合实验室东莞523800

中国散裂中子源一期工程于2018年通过国家验收,当前束流功率已经达到140 kW.为进一步提高靶站慢化器输出中子强度,已经提出中国散裂中子源二期500 kW功率升级计划.靶站关键部件长期受到高通量、高能量的粒子辐照,会产生较强的辐照损伤,... 详细信息

中国散裂中子源一期工程于2018年通过国家验收,当前束流功率已经达到140 kW.为进一步提高靶站慢化器输出中子强度,已经提出中国散裂中子源二期500 kW功率升级计划.靶站关键部件长期受到高通量、高能量的粒子辐照,会产生较强的辐照损伤,影响着这些部件的使用寿命.本文首先使用PHITS3.33程序计算了钨、SS316不锈钢、6061铝合金3种材料的质子和中子原子离位截面以及氢、氦的产生截面,并分析了NRT(Norgett-Robinson-Torrens)模型和热平衡前原子复位修正(athermal recombination corrected,ARC)模型对材料离位损伤的影响.在此基础上结合中国散裂中子源二期靶站基线模型计算了靶站关键部件在500 kW的束流功率下运行5000 h产生的原子离位次数(displacement per atom,DPA)以及氢、氦的产额.计算结果表明,钨靶受辐照后产生的NRT-dpa,ARC-dpa,H和He产额最大值分别为8.01 dpa/y(1 y=2500 MW·h),2.39 dpa/y,5110 appm/y(atom parts per million,appm,每百万原子中产生该原子的个数)和884 appm/y.同样也计算了靶容器、慢化器反射体容器和质子束窗的辐照损伤值,根据这些部件的辐照损伤值预估了各自的使用寿命.这些结果对分析中国散裂中子源二期靶站关键部件的辐照损伤情况,构建合理的维护方案有着十分重要的意义.

关键词：中国散裂中子源二期靶站辐照损伤 ARC-dpa PHITS模拟

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