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Gap-surface plasmon metasurfaces for linear-polarization conversion, focusing,and beam splitting

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Photonics Research 2020年第5期8卷 707-714页

作者： FEI ding YITING CHEN SERGEY IBOZHEVOLNYI Centre for Nano Optics University of Southern DenmarkCampusvej 55DK-5230 OdenseDenmark

Gap-surface plasmon(GSP)metasurfaces have attracted progressively increasing attention due to their planar configurations,ease of fabrication,and unprecedented capabilities in manipulating the reflected fields that enable integrating diverse bulk-optic-based optical components into a single ultrathin flat *** this work,we design and experimentally demonstrate multifunctional metalenses that perform simultaneous linear-polarization conversion,focusing,and beam splitting,thereby reproducing the combined functionalities of conventional halfwave plates,parabolic reflectors,and beam *** fabricated single-focal metalens incorporates properly configured distinct half-wave-plate-like GSP meta-atoms and exhibits good performance under linearly polarized incidence in terms of orthogonal linear-polarization conversion(>75%)and focusing(overall efficiency>22%)in the wavelength spectrum ranging from 800 to 950 *** further extend the combined functionalities,we demonstrate a dual-focal metalens that splits and focuses a linearly polarized incident beam into two focal spots while maintaining the capability of orthogonal linear-polarization ***,the power distribution between two split beams can readily be controlled by judiciously positioning the incident *** demonstrated multifunctional GSP-based metalenses mimic the combined functionalities of a sequence of discrete bulk optical components,thereby eliminating the need for their mutual alignment and opening new perspectives in the development of ultracompact and integrated photonic devices.

关键词： polarization beam splitting

产教融合背景下以水蒸气蒸馏制备山苍子油及相关分析的实验教学

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广东化工 2024年第4期51卷 153-156页

作者：王冠丁益民上海大学化学系上海20044

以行业人才需求为导向,结合香料行业特点,设计了一个本科综合化学实验教学项目。以廉价、易得的山苍子为原料,采用水蒸气蒸馏法提取山苍子挥发油,并用气相色谱-质谱联用法对其化学成分进行定性、定量分析。通过该综合实验教学,让学生了... 详细信息

以行业人才需求为导向,结合香料行业特点,设计了一个本科综合化学实验教学项目。以廉价、易得的山苍子为原料,采用水蒸气蒸馏法提取山苍子挥发油,并用气相色谱-质谱联用法对其化学成分进行定性、定量分析。通过该综合实验教学,让学生了解掌握天然精油的制备方法,掌握水蒸气蒸馏的原理与方法,GC-MS的结构、工作原理、操作和分析,从而提高其实验操作技能及分析总结能力,为其未来的就业打下坚实基础。

关键词：产教融合综合化学实验教学山苍子油水蒸气蒸馏气质联用

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镀金烧结件盐雾试验影响因素探讨

机电元件 2024年第2期44卷 40-42页

作者：肖祥王亮丁健泰州市航宇电器有限公司江苏泰州225300

结合镀金的工艺条件和盐雾试验结果,从产品材料、镀层结构、镀层孔隙率等方面进行分析和探讨,总结出镀金层盐雾试验的几个影响因素。

关键词：镀金层盐雾试验腐蚀孔隙率

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生态文明建设在乡村振兴中的应用与实践

农机使用与维修 2024年第8期 132-134页

作者：黄君华丁颖雅安职业技术学院四川雅安625000 四川农业大学四川雅安625000

生态文明建设对于提升乡村质量、促进乡村可持续发展及推动农村经济多元化有重要意义。该文探讨了生态文明建设与乡村振兴之间的关系,分析生态文明建设在提升农村环境质量、促进可持续发展以及改善农民生活质量方面的应用与实践。以四... 详细信息

生态文明建设对于提升乡村质量、促进乡村可持续发展及推动农村经济多元化有重要意义。该文探讨了生态文明建设与乡村振兴之间的关系,分析生态文明建设在提升农村环境质量、促进可持续发展以及改善农民生活质量方面的应用与实践。以四川地区“畜禽粪便及农作物秸秆循环利用系统”为案例,通过将畜禽粪便和农作物秸秆资源化利用,生产有机肥料和生物质能源,不仅解决了环境污染问题,还大幅提高了农作物的产量和品质,促进了农业可持续发展。同时,该系统还带动了农村经济的多元化发展,增加了农民收入,提升了农民生活质量。最后总结生态文明建设在乡村振兴实施过程中面临的问题与挑战,并提出了未来生态文明建设在乡村振兴中的进一步应用建议,以期为其他地区提供参考和借鉴。

关键词：生态文明建设乡村振兴可持续发展

Three-dimensional Construction and Omni-directional Rolling Analysis of a Novel Frame-like Lattice Modular Robot

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Chinese Journal of Mechanical Engineering 2015年第4期28卷 691-701页

作者： ding Wan WU Jianxu YAO Yan'an School of Mechanical Electronic and Control Engineering Beijing Jiaotong University

Lattice modular robots possess diversity actuation methods, such as electric telescopic rod, gear rack, magnet, robot arm, etc. The researches on lattice modular robots mainly focus on their hardware descriptions and reconfiguration algorithms. Meanwhile, their design architectures and actuation methods perform slow telescopic and moving speeds, relative low actuation force verse weight ratio, and without internal space to carry objects. To improve the mechanical performance and reveal the locomotion and reconfiguration binary essences of the lattice modular robots, a novel cube-shaped, frame-like, pneumatic-based reconfigurable robot module called pneumatic expandable cube（PE-Cube） is proposed. The three-dimensional（3D） expanding construction and omni-directional rolling analysis of the constructed robots are the main focuses. The PE-Cube with three degrees of freedom（Do Fs） is assembled by replacing the twelve edges of a cube with pneumatic cylinders. The proposed symmetric construction condition makes the constructed robots possess the same properties in each supporting state, and a binary control strategy cooperated with binary actuator（pneumatic cylinder） is directly adopted to control the PE-Cube. Taking an eight PE-Cube modules＇ construction as example, its dynamic rolling simulation, static rolling condition, and turning gait are illustrated and discussed. To testify telescopic synchronization, respond speed, locomotion feasibility, and repeatability and reliability of hardware system, an experimental pneumatic-based robotic system is built and the rolling and turning experiments of the eight PE-Cube modules＇ construction are carried out. As an extension, the locomotion feasibility of a thirty-two PE-Cube modules＇ construction is analyzed and proved, including dynamic rolling simulation, static rolling condition, and dynamic analysis in free tipping process. The proposed PE-Cube module, construction method, and locomotion analysis enrich the family of the la

关键词： modular robot pneumatic expandable cube pneumatic actuation omni-directional rolling binary control strategy

Corrosion behavior of metallic alloys in molten chloride salts for thermal energy storage in concentrated solar power plants： A review

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Frontiers of Chemical Science and Engineering 2018年第3期12卷 564-576页

作者： Wenjin ding Alexander Bonk Thomas Bauer Institute of Engineering Thermodynamics German Aerospace Center (DLR) 70569 Stuttgart Germany Institute of Engineering Thermodynamics German Aerospace Center (DLR) 51147 Cologne Germany

Recently, more and more attention is paid on applications of molten chlorides in concentrated solar power （CSP） plants as high-temperature thermal energy storage （TES） and heat transfer fluid （HTF） materials due to their high thermal stability limits and low prices, compared to the commercial TES/HTF materials in CSP- nitrate salt mixtures. A higher TES/HTF operating temperature leads to higher efficiency of thermal to electrical energy conversion of the power block in CSP, however causes additional challenges, particularly increased corrosiveness of metallic alloys used as contain- ers and structural materials. Thus, it is essential to study corrosion behaviors and mechanisms of metallic alloys in molten chlorides at operating temperatures （500-800℃） for realizing the commercial application of molten chlorides in CSE The results of studies on hot corrosion of metallic alloys in molten chlorides are reviewed to understand their corrosion behaviors and mechanisms under various conditions （e.g., temperature, atmosphere）. Emphasis has also been given on salt purification to reduce corrosive impurities in molten chlorides and development of electrochemical techniques to in-situ monitor corrosive impurities in molten chlorides, in order to efficiently control corrosion rates of metallic alloys in molten chlorides to meet the requirements of industrial applications.

关键词： corrosion mechanisms impurities metallic corrosion salt purification electrochemical techniques

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国际工程EPC项目风险识别和应对

江西建材 2024年第4期 301-302,313页

作者：丁洁徐晓斌广州铁路职业技术学院广东广州511300

文中以项目风险管理流程为切入点,全面分析评估国际工程EPC项目在实际执行中主要面临的政治、合同、设计、人力资源管理等风险类型,阐述在风险管理过程中如何运用科学方法进行风险识别,探讨了规避、转移、减轻和接受等风险应对策略,为... 详细信息

文中以项目风险管理流程为切入点,全面分析评估国际工程EPC项目在实际执行中主要面临的政治、合同、设计、人力资源管理等风险类型,阐述在风险管理过程中如何运用科学方法进行风险识别,探讨了规避、转移、减轻和接受等风险应对策略,为相关人员提供技术参考,也为灰岩区等特定水土地形风险区的基础设施项目建设、安全运营提供借鉴。

关键词： “一带一路” 国际EPC项目风险识别风险应对

长春市居民对中医药服务的认知度及其影响因素调研

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黑龙江科学 2024年第7期15卷 34-37页

作者：刘琳琳丁晨长春中医药大学长春130117

为了解长春市居民对中医药服务的基本认知情况,分析其影响因素,采用问卷调查法收集数据,运用SPSS 23.0软件对数据进行统计分析。研究结果显示,居民对中医药服务的认知度主要受中医药服务综合评价、中医药治疗路径、中医药服务体验、获... 详细信息

为了解长春市居民对中医药服务的基本认知情况,分析其影响因素,采用问卷调查法收集数据,运用SPSS 23.0软件对数据进行统计分析。研究结果显示,居民对中医药服务的认知度主要受中医药服务综合评价、中医药治疗路径、中医药服务体验、获知途径、中医治疗依据等因素影响。部分居民对中医药服务存在一定程度的认知偏差,主要在于基层中医药服务人员的技术水平不高,居民获取中医药服务信息的途径较窄。加强对中医药服务的认知与解读,提高中医药人才培养标准,建设中医药服务宣传平台等有利于进一步增强居民对中医药服务的认知。

关键词：中医药服务中医药认知度长春市主成分分析

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结直肠息肉相关危险因素研究现状

齐齐哈尔医学院学报 2024年第14期45卷 1382-1386页

作者：辜柏源丁永年新疆医科大学第二附属医院新疆乌鲁木齐830000

结直肠息肉是一种常见的肠道疾病,其发生与多种因素密切相关。随着医学技术的不断进步,人们对结直肠息肉相关危险因素的认识也越来越深入。本文详细综述了结直肠息肉的相关危险因素,包括年龄、性别、生活习惯、代谢因素、肠道微生物等,... 详细信息

结直肠息肉是一种常见的肠道疾病,其发生与多种因素密切相关。随着医学技术的不断进步,人们对结直肠息肉相关危险因素的认识也越来越深入。本文详细综述了结直肠息肉的相关危险因素,包括年龄、性别、生活习惯、代谢因素、肠道微生物等,以期为临床治疗及预防息肉发生进展提供参考。

关键词：结直肠息肉危险因素研究现状