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Arbitrary linear THz wave polarization converter with cracked cross meta-surface

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Chinese Optics Letters 2019年第4期17卷 80-83页

作者： Han Sun Lan Wang Yaxin Zhang Shixiong Liang Jiaguang Han Feng Lan xinlan zhou Ziqiang Yang Terahertz Science and Technology Research Center University of Electronic Science and Technology of China National Key Laboratory of Application Specific Integrated Circuit Hebei Semiconductor Research Institute Center for Terahertz Waves College of Precision Instrument and Optoelectronics Engineering Tianjin UniversityKey Laboratory of Optoelectronic Information Technology Ministry of Education

This Letter presents a double-layer structure combining a cracked cross meta-surface and grating surface to realize arbitrary incident linear terahertz(THz) wave polarization conversion. The arbitrary incident linear polarization THz wave will be induced with the same resonant modes in the unit cell, which results in polarization conversion insensitive to the linear polarization angle. Moreover, the zigzag-shaped resonant surface current leads to a strong magnetic resonance between the meta-surface and gratings, which enhances the conversion efficiency. The experimental results show that a more than 70% conversion rate can be achieved under arbitrary linear polarization within a wide frequency band. Moreover, around 0.89 THz nearly perfect polarization conversion is realized.

关键词： Letter presents structure combining polarization conversion

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受贿罪数额认定及其司法适用问题辨析

湖南农业大学学报（社会科学版） 2018年第4期19卷 73-78页

作者：周昕兰湖南大学法学院湖南长沙410082

基于受贿罪数额认定关乎受贿罪的定罪量刑,对其数额认定与司法适用中存在的"多次受贿"、"未经处理"的界定、受贿数额累计中的期限、财产性利益的计算等存在争议的问题进行辨析。"多次受贿"是自然意义上的"多次";"未经处理"包括未经刑事... 详细信息

基于受贿罪数额认定关乎受贿罪的定罪量刑,对其数额认定与司法适用中存在的"多次受贿"、"未经处理"的界定、受贿数额累计中的期限、财产性利益的计算等存在争议的问题进行辨析。"多次受贿"是自然意义上的"多次";"未经处理"包括未经刑事处罚、党纪和政纪处分,还包括未经单位和组织开展的"清退"等方式的"处理"。多次受贿的受贿数额累计应以受贿行为认定为前提,并受追诉期限限制;为了便于把握多次受贿行为之间是否存在"连续状态"这一关键问题,连续状态认定的时限应与刑法规定的追诉期限一致为原则。财产性利益的计算基于"实际支付"的原则,尽可能突出重点,并针对"贿赂物"特殊属性和情节细化和明晰有关折算规则。

关键词：受贿罪数额认定司法适用追诉期限财产性利益

自我镜像下的桑提亚哥——析《老人与海》的形象塑造

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广州广播电视大学学报 2003年第4期3卷 32-35页

作者：马小娟周新兰长沙市商业职业中专长沙410076 华南师大人文学院广州510631

《老人与海》中的桑提亚哥因其坚韧的“硬汉性格”而成为文学殿堂中一个极其突显的艺术形象。桑提亚哥之所以能始终坚守着他的“硬汉性格”,一定程度上是因为他在想象中达成了对自我完美个性的塑造。文中的小孩、马林鱼、迪马齐奥、狮子... 详细信息

《老人与海》中的桑提亚哥因其坚韧的“硬汉性格”而成为文学殿堂中一个极其突显的艺术形象。桑提亚哥之所以能始终坚守着他的“硬汉性格”,一定程度上是因为他在想象中达成了对自我完美个性的塑造。文中的小孩、马林鱼、迪马齐奥、狮子,其实都是老人的自我镜像。在想象的作用下,这四者与老人的“硬汉性格”达成了和谐共振,能指与所指实现了和谐与完美的统一。

关键词：硬汉性格桑提亚哥自我镜像

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脂肪肝中医病因病机探析

辽宁中医药大学学报 2014年第6期16卷 173-175页

作者：周新兰任洪丽上海市公共卫生临床中心上海201508 上海光华中西医结合医院上海200052

探讨分析脂肪肝发病的中医病因及病机。脂肪肝属中医学的"胁痛""痰浊""痞满""积聚"等范畴,其发病多与酒食过度、情志不遂、贪逸少劳、先天禀赋、药毒、疫毒伤肝等诸多因素有关,导致肝失疏泄,脾失运化,水湿不化,滋生痰浊,气滞血瘀,其病... 详细信息

探讨分析脂肪肝发病的中医病因及病机。脂肪肝属中医学的"胁痛""痰浊""痞满""积聚"等范畴,其发病多与酒食过度、情志不遂、贪逸少劳、先天禀赋、药毒、疫毒伤肝等诸多因素有关,导致肝失疏泄,脾失运化,水湿不化,滋生痰浊,气滞血瘀,其病位在肝,涉及脾胃胆肾诸脏,病机为本虚标实,本虚以脾肾为主,标实主要与气滞、痰湿、血瘀有关。

关键词：脂肪肝中医病因中医病机

Recent development in electrode design for wide-temperature supercapacitors

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Science China Chemistry 2025年第1期68卷 96-117页

作者： Jianhong Liu Qiang zhou Yuxiao Lin Xinsheng Zhao Guangmin zhou Xiaoxiao Li School of Physics and Electronic Engineering Jiangsu Normal University Tsinghua-Berkeley Shenzhen Institute & Tsinghua Shenzhen International Graduate School Tsinghua University

An ever-increasing market demand has stimulated the soaring enthusiasm of researchers to develop wide-temperature supercapacitors(SCs). The active electrode is one of the most important parts of SC, which is directly related to the energy density,power transmission and long-term cyclability of the device in the wide-temperature environment. Compared with the SC electrodes aimed for room-temperature application, the SC electrodes for operating at wide-temperature scene often face greater challenges. In this review, the main challenges of SC electrodes under various temperature conditions, including low, high and cross-fade temperatures, are summarized. The relevant performance decay and failure mechanisms of wide-temperature SC electrodes are analyzed. In addition, this review deals with the recent studies and developments in robust wide-temperature SC electrodes with respect to the rational design of electrode structures and the exploitation of advanced active materials. Finally, the future directions for exploring reliable wide-temperature SCs are also proposed.

关键词： supercapacitor wide-temperature electrode design active materials

镁浸渍生物炭吸附氨氮和磷:制备优化和吸附机理

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化工学报 2020年第4期71卷 1683-1695页

作者：李安玉李双莉余碧戈马爱英周鑫兰谢建慧蒋艳红邓华广西师范大学珍稀濒危动植物生态与环境保护教育部重点实验室广西桂林541004 岩溶生态与环境变化研究广西高校重点实验室广西桂林541004

利用废弃的木薯杆制备了载镁的生物炭吸附剂。以氨氮、磷为目标污染物,采用控制变量法研究了不同镁盐改性、MgCl2浓度、碳化温度、固液比和碳化时间对氨氮、磷吸附性能的影响,制备最具吸附性能的载镁木薯秆基生物炭(Mg-BC),进行批量吸... 详细信息

利用废弃的木薯杆制备了载镁的生物炭吸附剂。以氨氮、磷为目标污染物,采用控制变量法研究了不同镁盐改性、MgCl2浓度、碳化温度、固液比和碳化时间对氨氮、磷吸附性能的影响,制备最具吸附性能的载镁木薯秆基生物炭(Mg-BC),进行批量吸附氨氮和磷实验。利用等温模型(Langmuir和Freundlich模型)和动力学模型(准一级动力学、准二级动力学和颗粒内扩散模型)探究其吸附特性,在其吸附特性研究的基础上,运用FTIR、XRD、SEM-EDS、XPS等表征手段对其吸附机理进行探讨。结果表明,Mg-BC对氨氮和磷的吸附过程均符合Freundlich模型和准二级动力学模型,为多分子层的化学吸附,理论饱和吸附量分别为43.48 mg·g^-1和96.00 mg·g^-1。结合表征结果推测,Mg-BC吸附氨氮、磷主要通过官能团作用、络合沉淀和离子交换等多过程协同完成。

关键词：负载镁生物炭木薯秸秆吸附吸附剂吸附机制

Dative B–N bonds weaven toward two-dimensional purely organic materials for single crystals

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Science China Chemistry 2025年第1期68卷 12-14页

作者： Wei-Lei zhou Siwei Wang Yong Chen College of Chemistry and Materials Science Inner Mongolia Key Laboratory of Chemistry for Nature Products and Synthesis for Functional Molecules Innovation Team of Optical Functional Molecular Devices Inner Mongolia Minzu University College of Chemistry Nankai University

Molecular topology is one of the important topics to study and understand the relationship between molecular structure and properties [1]. Particularly, two-dimensional (2D) materials with extremely high surface area and ultra-thin morphology have attracted considerable attention due to their unexpected properties in materials and chemistry [2,3].

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Fine-tuning the spatial allocation of phytohormones for smart canopy, smart breeding, and smart agriculture

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Science China Life Sciences 2025年第1期68卷 309-310页

作者： Tao zhou Lin Li National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural University HuBei HongShan Laboratory

The dual challenges of global climate change and population growth have increased demand for higher crop yields per unit area. The innovative technology of smart agriculture aims to synergize breeding, cultivation, and production through the application of biological and informatics technologies. Historically, the “Green Revolution” introduced semidwarf varieties of certain key crops by utilizing mutations affecting gibberellin pathways, which significantly increased planting densities and yields.

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Microstructure and Wear/corrosion Resistance of Stainless Steel Laser-alloyed with Mn+W_(2)C, Mn+NiWC and Mn+SiC

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 283-294页

作者： zhou Rui DIAO Xiaogang SUN Yixin School of Metallurgical Engineering Jiangsu University of Science and TechnologyZhangjiagang 215600China CITIC Heavy Cast Iron Industry Co. Ltd.Luoyang 417039China

In-situ formed high Mn steel coating reinforced by carbides was formed by laser surface alloying(LSA).Laser alloyed layers on 1Cr18Ni9Ti steel with Mn+W_(2)C(specimen A),Mn+NiWC(specimen B)and Mn+SiC(specimen C)powders were fabricated to improve the wear and corrosion behavior of 1Cr18Ni9Ti steel blades in high speed *** evolution,phases,element distribution,microhardness,wear and corrosion behavior of the laser alloyed layers were *** indicated that high Mn steel matrix composites with undissolved W_(2)C,WC and other in-situ formed carbides were formed by LSA with Mn+W_(2)C and Mn+NiWC while SiC totally dissolved into the high Mn matrix when adding Mn+*** as the binding phase in Ni-WC powder decreased the crack sensitivity of the alloyed layer as compared with the addition of W_(2)C *** improvement in average microhardness was achieved in the matrix in specimen A,B and C,with the value of 615,602 and 277 HV_(0.5),while that of the substrate was 212 HV_(0.5).The increase of microhardness,wear and corrosion resistance is highly corelated to microstructure,formed phases,type and content of carbides,micro-hardness and toughness of the alloyed layers.

关键词： laser surface alloying stainless steel carbide type microstructure wear and corrosion resistance