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Multiplexed manipulation of orbital angular momentum and wavelength in metasurfaces based on arbitrary complex-amplitude control

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light(Science & Applications) 2024年第5期13卷 930-940页

作者： Guoli He Yaqin Zheng Changda Zhou siyang li Zhonghong Shi Yanhui Deng Zhang-Kai Zhou State Key Laboratory of Optoelectronic Materials and Technologies School of PhysicsSun Yat-sen UniversityGuangzhou 510275China

Due to its unbounded and orthogonal modes,the orbital angular momentum(OAM)is regarded as a key optical degree of freedom(DoF)for future information processing with ultra-high capacity and *** the manipulation of OAM based on metasurfaces has brought about great achievements in various fields,such manipulation currently remains at single-DoF level,which means the multiplexed manipulation of OAM with other optical DoFs is still lacking,greatly hampering the application of OAM beams and advancement of *** order to overcome this challenge,we propose the idea of multiplexed coherent pixel(MCP)for *** approach enables the manipulation of arbitrary complex-amplitude under incident lights of both plane and OAM waves,on the basis of which we have realized the multiplexed DoF control of OAM and *** a result,the MCP method expands the types of incident lights which can be simultaneously responded by metasurfaces,enriches the information processing capability of metasurfaces,and creates applications of information encryption and OAM *** findings not only provide means for the design of high-security and high-capacity metasurfaces,but also raise the control and application level of OAM,offering great potential for multifunctional nanophotonic devices in the future.

关键词： momentum offering overcome

Imide-based covalent organic framework with excellent cyclability as an anode material for lithium-ion battery

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Chinese Chemical Letters 2024年第6期35卷 206-210页

作者： Yue Qian Zhoujia liu Haixin Song Ruize Yin Hanni Yang siyang li Weiwei Xiong Saisai Yuan Junhao Zhang Huan Pang School of Environmental&Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Chemistry&Chemical Engineering Yangzhou UniversityYangzhou 225009China Shandong Key Laboratory of Biochemical Analysis College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China

Covalent organic frameworks(COFs)exhibiting reversible redox behaviors have been identified as promising candidates for constructing electrode materials in lithium-ion batteries(liBs).However,their extensive application has been limited due to finite redox sites and poor structural *** this study,we design and synthesize a novel polyimide covalent organic framework(PI-COF)using the traditional solvothermal method and successfully apply it as an anode material for *** large conjugated structure of PI-COF accelerates charge transfer,while its large surface area provides more active sites,making PI-COF an attractive anode material for ***,the PI-COF anode material demonstrates high reversible specific capacity and excellent long-term cycling stability due to its COF ***,the PI-COF electrodes deliver a specific capacity of 800 m Ah/g at a current density of 200 m A/g after 200 cycles,while a specific capacity of 450 m Ah/g at a current density of 1000 m A/g is sustained after 800 *** outstanding lithium storage capacity,particularly the satisfactory long-term cycling stability,establishes PI-COF as a promising material for liBs.

关键词： Ethylenediaminetetraacetic dianhydride Covalent organic frameworks Polyimide lithium-ion battery Anode material

Unveiling potential sex-determining genes and sex-specific markers in autotetraploid Carassius auratus

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Science China life Sciences 2024年

作者： Kun Zhang Xu Huang Chongqing Wang Xidan Xu Xiaowei Xu Xiaoping Dong Qingwen Xiao Jinhai Bai Yue Zhou Zhengkun liu Xinyi Deng Yan Tang siyang li Enkui Hu Wanjing Peng ling Xiong Qinbo Qin Shaojun liu State Key Laboratory of Developmental Biology of Freshwater Fish Engineering Research Center of Polyploid Fish Reproduction and Breeding of the State Education Ministry College of Life Sciences Hunan Normal University Nansha-South China Agricultural University Fishery Research Institute Hunan Yuelu Mountain Science and Technology Co. Ltd.for Aquatic Breeding

Autotetraploid Carassius auratus is a stable hereditary autotetraploid fish resulting from the hybridization of Carassius auratus red var.(RCC, ♀) × Megalobrama amblycephala(BSB, ♂), containing four sets of RCC chromosomes. However, the molecular mechanism underlying the determination of sex in this species remains largely unknown. Currently, there lacks a full understanding of the molecular mechanisms governing sex determination and specific molecular markers to differentiate sex in this species. In this study, 25,801,677 SNPs(Singlenucleotide polymorphism) and 6,210,306 Indels(insertion-deletion) were obtained from whole-genome resequencing of 100 individuals(including 50 female and 50 male). Further identification confirmed the candidate chromosomes as Chr46B, with the sex-determining region located at Chr46B: 22,500,000-22,800,000 bp. Based on the male-specific insertion(26 bp) within the candidate sex-determining region, a pair of sex-specific molecular markers has been identified. In addition, based on the screening of candidate sex-determining region genes and RT-qPCR validation analysis, ADAM10, AQP9 and tc1a were identified as candidate sex-determining genes. These findings provide a robust foundation for investigating sex determination mechanisms in fish, the evolution of sex chromosomes, and the development of monosex populations.

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钛/钢异种金属高能束焊接研究进展

焊管 2024年第5期47卷 11-17页

作者：李思阳陕西航空职业技术学院陕西汉中723000

通过对钛/钢异种金属高能束焊接的研究现状阐述,分析了高能束直接焊接、间接焊接(添加中间层、复合中间层)方法的优缺点,认为通过控制热源位置、控制热输入、添加中间层等方法可调控焊缝中Ti-Fe熔化比,抑制Ti-Fe金属间化合物的生成;利... 详细信息

通过对钛/钢异种金属高能束焊接的研究现状阐述,分析了高能束直接焊接、间接焊接(添加中间层、复合中间层)方法的优缺点,认为通过控制热源位置、控制热输入、添加中间层等方法可调控焊缝中Ti-Fe熔化比,抑制Ti-Fe金属间化合物的生成;利用高熵合金具有形成单相固溶体的优势,将高熵合金作为中间层可以实现焊缝高熵化,进一步提高钛/钢焊接接头的综合性能,这将是未来钛/钢异种金属焊接研究的重点。

关键词：钛/钢高能束焊接中间层高熵化

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我国海洋牧场发展现状及典型模式研究

中国渔业经济 2024年第4期42卷 51-60页

作者：易卫华李思阳广州市社会科学院农村研究所广东广州510410

海洋牧场对于保护海洋生物资源、改善海洋生态环境、促进海洋经济发展等具有重要的推动作用,同时还有助于提供高质量的动物蛋白、充实“蓝色粮仓”。近年来,通过理顺管理体制机制,加大资金投入,强化海洋装备水平,海洋牧场建设及相关产... 详细信息

海洋牧场对于保护海洋生物资源、改善海洋生态环境、促进海洋经济发展等具有重要的推动作用,同时还有助于提供高质量的动物蛋白、充实“蓝色粮仓”。近年来,通过理顺管理体制机制,加大资金投入,强化海洋装备水平,海洋牧场建设及相关产业不断发展壮大,但仍存在科技水平难以适应风险管理需求、选址缺乏科学规划、产业融合创新不够等问题。从国内外海洋牧场发展情况来看,主要形成了“渔业+”“生态+”“休闲+”“新能源+”等多元化的海洋牧场发展模式,建议完善海洋牧场管护机制,强化政策扶持与保障,推动海洋牧场科技创新,促进产业链条延伸拓展,强化区域合作抱团发展。

关键词：海洋牧场产业链生态修复海洋装备

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Recent advances on aerobic photocatalytic methane conversion under mild conditions

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Nano Research 2023年第11期16卷 12558-12571页

作者： Yuheng Jiang siyang li Xiaoyu Fan Zhiyong Tang Chinese Academy of Science(CAS)Key Laboratory of Nanosystem and Hierarchy Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China Center for Nanoscale Science and Technology Academy for Advanced Interdisciplinary StudiesPeking UniversityBeijing 100871China University of Chinese Academy of Sciences Beijing 100049China Sino-Danish College University of Chinese Academy of SciencesBeijing 100049China

Photocatalytic methane conversion to high value-added chemicals under mild conditions acts as a promising approach to utilize natural gas and renewable ***,aerobic photocatalytic methane conversion that uses molecular oxygen as oxidant has attracted much attention because it is thermodynamic favorable and could generate various reactive oxygen species,resulting in many value-added products like methanol,formaldehyde,ethane,and *** this review,we classify the aerobic photocatalytic methane conversion into aerobic photocatalytic partial oxidation of methane(APPOM)and aerobic photocatalytic coupling of methane(APCM).We particularly focus on the fundamentals of oxygen activation and methane reaction modes in these ***,we provide a brief summary for current challenges and future prospects towards aerobic photocatalytic methane conversion.

关键词： photocatalysis oxygen methane oxidation coupling mild conditions

基于Spark Streaming的海量GPS数据实时地图匹配算法

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计算机应用研究 2024年第5期41卷 1338-1342页

作者：陈艳艳李四洋张云超北京工业大学交通工程北京市重点实验室北京100124

浮动车GPS数据作为交通信息处理的基础,随着被监控车辆数量的高速增长,产生了海量GPS数据,对地图匹配提出了挑战。为了解决传统匹配方法难以满足匹配效率和精度的不足,提出一种针对海量GPS数据的实时并行地图匹配算法,能够同时保证较高... 详细信息

浮动车GPS数据作为交通信息处理的基础,随着被监控车辆数量的高速增长,产生了海量GPS数据,对地图匹配提出了挑战。为了解决传统匹配方法难以满足匹配效率和精度的不足,提出一种针对海量GPS数据的实时并行地图匹配算法,能够同时保证较高匹配精度和运算效率。为构建一种面向实时数据流的高效、准确实时地图匹配算法,首先通过引入速度、方向综合权重因子对依赖历史轨迹的离线地图匹配算法进行重构,进而引入Spark Streaming分布式计算框架,实现地图匹配算法的实时、并行运算,大幅提升实时地图匹配效率。实验结果表明,该算法在复杂路段的匹配准确率较常规拓扑匹配算法提高10%以上,整体匹配准确率达到95%以上;在匹配效率方面,较同等数量的单机服务器效率可提高4倍左右。实验结果表明,该算法在由11台机器组成的计算集群上实现8000万个GPS数据点的实时地图匹配,证明了该算法可以完成城市地区的实时车辆匹配。

关键词：海量 GPS 并行计算地图匹配实时计算 Spark

LaneDraw: Cascaded lane and its bifurcation detection with nested fusion

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Science China(Technological Sciences) 2021年第6期64卷 1238-1249页

作者： REN KeYan HOU HaoChen li siyang YUE TianYi Faculty of Information Technology Beijing University of TechnologyBeijing 100124China Beijing Engineering Research Center for IoT Software and Systems Beijing 100124China

Lane and its bifurcation detection is a vital and active research topic in low cost camera-based autonomous driving and advanced driver assistance system(ADAS). The common lane detection pipeline usually predicts lane segmentation mask firstly, and then makes line fitting by parabola or spline post-processing. However, if the speed of the lane and its bifurcation detection is fast and robust enough, we think curve fitting is not a necessary step. The goal of this work is to get accurate lane segmentation,identification of every lane, adaptability of lane numbers and the right combination of lane bifurcation. In this work, we relabeled lane and its bifurcation with solid line if the image of Tu Simple dataset has both of them. In the data training process, we apply a data balance strategy for the heavily biased lane and non-lane data. In such a way, we develop a competitive cascaded instance lane detection model and propose a novel bifurcation pixel embedding nested fusion method based on full binary segmentation pixel embedding with self-grouping cluster, called Lane Draw. Our method discards curve fitting process, therefore it reduces the complexity of post-processing and increases detection speed at 35 fps. Moreover, the proposed method yields better performance and high accuracy on the relabeled Tu Simple dataset. To the best of our knowledge, this is the first attempt in 2 D lane and bifurcation detection, which more often happens in actual situations.

关键词： lane detection bifurcation fusion instance segmentation autonomous driving

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齐秉慧《齐氏医案》的学术渊源与特色探析

中国中医基础医学杂志 2024年第7期30卷 1104-1107页

作者：尹沫淋李思扬肖红吴垠莲叶静王丽成都中医药大学成都610075

《齐氏医案》为清代四川著名医家齐秉慧撰辑舒驰远《伤寒集注》和赵献可《医贯》等诸家著作而成。该书以“正虚邪凑”为理论核心,以临床验案为佐证,融合了六经辨证与温补先、后天的理论,深刻阐发了一切杂病法门统于六经之中的观点,撰“... 详细信息

《齐氏医案》为清代四川著名医家齐秉慧撰辑舒驰远《伤寒集注》和赵献可《医贯》等诸家著作而成。该书以“正虚邪凑”为理论核心,以临床验案为佐证,融合了六经辨证与温补先、后天的理论,深刻阐发了一切杂病法门统于六经之中的观点,撰“医门十劝”“病家十戒”劝诫医者重医德,告诫病家保生息。全书理论和实践紧密结合,以案证论,对六经辨证和温补之法的理论研究与临床应用具有一定的参考价值和指导意义。

关键词：齐秉慧《齐氏医案》学术渊源学术特色

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