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Programmable microfluidics for dynamic multiband camouflage

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Microsystems & Nanoengineering 2023年第2期9卷 275-282页

作者： Chunzao Feng Mingran Mao Xiaohui Zhang Yutian Liao Xiaohui Xiao huidong liu Kang liu MOE Key Laboratory of Hydraulic Machinery Transients School of Power and Mechanical EngineeringWuhan UniversityWuhan 430072 HubeiChina

Achieving multiband camouflage covering both visible and infrared regions is challenging due to the broad bandwidth and differentiated regulation demand in diverse regions.In this work,we propose a programmable microfluidic strategy that uses dye molecules in layered fluids to manipulate visible light-and infrared-semitransparent solvent to manipulate infrared light.With three primary fluid inputs,we achieve 64 chromaticity values and 8 emissivities from 0.42 to 0.90.In view of the wide tuning range,we demonstrate that the microfluidic flm can dynamically change its surface reflectance to blend into varying backgrounds in both visible and infrared images.Moreover,we fabricate the microfluidic device in a textile form and demonstrate its ability to match exactly with the colors of natural leaves of different seasons in the full hyperspectrum range.Considering the broadband modulation and ease of operation,the programmable microfluidic strategy provides a feasible approach for smart optical surfaces in long-span optical spectra.

关键词： multiband tuning visible

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江西上饶广丰白花岩明代二十四诸天壁画初探

文化创新比较研究 2024年第5期8卷 73-79页

作者：刘慧栋江西师范大学美术学院江西南昌330000

二十四诸天的图像组合,是佛教美术题材中常见的艺术表达。留存的遗迹多以雕塑、壁画的形式展现。江西省上饶市广丰区白花岩下的广福寺,其大雄宝殿有两铺古代壁画,表现的内容正是二十四诸天。而两铺壁画无文献记载,无题榜落款;浏览图像,... 详细信息

二十四诸天的图像组合,是佛教美术题材中常见的艺术表达。留存的遗迹多以雕塑、壁画的形式展现。江西省上饶市广丰区白花岩下的广福寺,其大雄宝殿有两铺古代壁画,表现的内容正是二十四诸天。而两铺壁画无文献记载,无题榜落款;浏览图像,其人物无背光、无头光、无坐骑、无胁侍、无台座及脚踩物;同时,还因年久失修坏掉了两位人物画像。通过考究文化背景、文献记载,结合图像学研究,对这两铺壁画的二十四诸天做出具体辨识,考证其创作年代为明代中后期,并分析两铺壁画的构图方式、色彩特点、笔法技巧等,为中国二十四诸天古代壁画遗存图像志增加一处实例。

关键词：明代壁画二十四诸天白花岩广福寺图像识别艺术研究

神话之为艺术——大、小昭寺释迦牟尼等身像的文献与艺术探究

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文化创新比较研究 2024年第6期8卷 74-79,95页

作者：刘慧栋江西师范大学美术学院江西南昌330000

阅读藏族历史、藏族美术史类文献,很难绕开有关松赞干布与文成公主、尺尊公主故事的记载。文献在介绍成亲故事的同时,常常会叙述拉萨的大昭寺与小昭寺分别供奉着两位公主带来的释迦牟尼12岁、8岁等身像。但在不同类型文献的表述中,关于... 详细信息

阅读藏族历史、藏族美术史类文献,很难绕开有关松赞干布与文成公主、尺尊公主故事的记载。文献在介绍成亲故事的同时,常常会叙述拉萨的大昭寺与小昭寺分别供奉着两位公主带来的释迦牟尼12岁、8岁等身像。但在不同类型文献的表述中,关于这两座等身像的说法多有差异,来源、流转、名称的不同说法造成众多文献引用不严谨乃至出现错误。该文对比当下常见的各类文献说法,溯源藏族历史文献记载,最终锚定目前已知最早文献对大、小昭寺的释迦牟尼等身像的说法源头,再结合藏族艺术发展过程中本土艺术对外来艺术借鉴的特点,在松赞干布与两公主故事背景下,提出大、小昭寺两尊佛像可能是藏地早期作品,同时提出作为文献引用更准确的说法。

关键词：释迦牟尼等身像大昭寺小昭寺藏族历史藏族美术史

基于GaAs E/D PHEMT工艺的Ku波段双通道幅相控制多功能芯片

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半导体技术 2024年第6期49卷 575-579,588页

作者：徐伟赵子润刘会东李远鹏中国电子科技集团公司第十三研究所石家庄050051

基于GaAs增强/耗尽型赝配高电子迁移率晶体管(E/D PHEMT)工艺设计了一款14~18 GHz的双通道多功能芯片。芯片集成了单刀双掷(SPDT)开关、6 bit数控移相器、4 bit数控衰减器和增益补偿放大器。采用正压控制开关以减小控制位数;优化移相、... 详细信息

基于GaAs增强/耗尽型赝配高电子迁移率晶体管(E/D PHEMT)工艺设计了一款14~18 GHz的双通道多功能芯片。芯片集成了单刀双掷(SPDT)开关、6 bit数控移相器、4 bit数控衰减器和增益补偿放大器。采用正压控制开关以减小控制位数;优化移相、衰减和放大等电路拓扑结构,以获得良好的幅相特性;采用紧凑布局、双通道对称的版图设计,以实现小尺寸和高性能。测试结果表明,+5 V电压下,接收通道增益大于3 dB,1 dB压缩点输出功率大于8 dBm;发射通道增益大于1 dB,1 dB压缩点输出功率大于2 dBm;64态移相均方根误差小于2.5°,16态衰减均方根误差小于0.3 dB,芯片尺寸为3.90 mm×2.25 mm。该多功能芯片可实现对射频信号幅度和相位的高精度控制,可广泛应用于微波收发模块。

关键词：双通道多功能芯片增强/耗尽型赝配高电子迁移率晶体管(E/D PHEMT) 单刀双掷(SPDT)开关数控移相器数控衰减器

非小细胞肺癌患者血清CCL11、LCN-2水平及其诊断价值

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国际检验医学杂志 2024年第14期45卷 1745-1749,1755页

作者：霍霄鸥张之君刘慧东太原市中心医院(北京大学第一医院太原医院)肿瘤科山西太原030009 太原市中心医院(北京大学第一医院太原医院)泌尿外科山西太原030009

目的探究非小细胞肺癌(NSCLC)患者血清嗜酸性粒细胞趋化因子(CCL11)、脂质转运蛋白-2(LCN-2)水平及其对NSCLC的诊断价值。方法选取2019年10月至2022年12月该院收治的NSCLC患者为NSCLC组(80例),另选取同期在该院进行诊治的80例肺部良性... 详细信息

目的探究非小细胞肺癌(NSCLC)患者血清嗜酸性粒细胞趋化因子(CCL11)、脂质转运蛋白-2(LCN-2)水平及其对NSCLC的诊断价值。方法选取2019年10月至2022年12月该院收治的NSCLC患者为NSCLC组(80例),另选取同期在该院进行诊治的80例肺部良性病变患者及80例健康志愿者为良性对照组和健康对照组。采用酶联免疫吸附试验(ELISA)测定血清CCL11、LCN-2水平;比较3组受试者一般资料及血清CCL11、LCN-2水平;采用受试者工作特征(ROC)曲线分析血清CCL11、LCN-2对NSCLC的诊断价值;采用多因素Logistic回归分析NSCLC发生的影响因素。结果NSCLC组血清CCL11、LCN-2水平均显著高于良性对照组和健康对照组(P0.05);不同性别、年龄、病理类型NSCLC患者血清CCL11、LCN-2水平比较,差异无统计学意义(P>0.05),有吸烟史、从事高油烟、粉尘等相关工作、中低分化程度、肿瘤最大径>3 cm、淋巴结发生转移、TNM分期为Ⅲ~Ⅳ期的NSCLC患者血清CCL11、LCN-2水平均显著高于无吸烟史、未从事高油烟、粉尘等相关工作、高分化程度、肿瘤最大径≤3 cm、淋巴结未转移、TNM分期为Ⅰ~Ⅱ期的NSCLC患者(P<0.05);ROC曲线结果显示,CCL11、LCN-2单独及二者联合评估诊断NSCLC的曲线下面积分别为0.849、0.841、0.926,灵敏度分别为73.8%、75.0%、85.0%,特异度分别为70.1%、70.0%、75.0%,二者联合诊断NSCLC的效能高于二者单独诊断(P<0.05);多因素Logistic回归分析结果显示,吸烟、从事高油烟、粉尘等相关工作及血清CCL11、LCN-2水平均是NSCLC发生的影响因素(P<0.05)。结论在NSCLC患者中,血清CCL11、LCN-2水平均显著增加,且与NSCLC患者临床病理特征密切相关,二者在诊断NSCLC中具有一定的临床价值。

关键词：非小细胞肺癌嗜酸性粒细胞趋化因子脂质转运蛋白-2 诊断价值

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粉煤灰制备聚合氯化铝废渣资源化利用研究

非金属矿 2024年第1期47卷 7-9,13页

作者：姜晓琳肖永丰刘汇东北京低碳清洁能源研究院北京102211

为进一步提高粉煤灰综合利用率,以不同组成的聚合氯化铝废渣为原料,通过焙烧活化制备硅肥,研究原料中主要成分含量的变化对硅肥有效硅含量的影响,并确定硅肥主要物相及生态安全性。结果表明,以粉煤灰制备聚合氯化铝废渣为原料制备硅肥... 详细信息

为进一步提高粉煤灰综合利用率,以不同组成的聚合氯化铝废渣为原料,通过焙烧活化制备硅肥,研究原料中主要成分含量的变化对硅肥有效硅含量的影响,并确定硅肥主要物相及生态安全性。结果表明,以粉煤灰制备聚合氯化铝废渣为原料制备硅肥的技术路线可行;不同SiO_(2)含量的多种废渣在相同活化参数下制备的硅肥有效硅含量相近,均可达30%左右;硅肥的主要物相为偏硅酸钙(CaSiO_(3))和霞石相(NaAlSiO_(4)),当原料中铝含量较高时还会生成少量钙铝黄长石相(Ca_(2)Al_(2)SiO_(7));硅肥中砷、镉、铅、铬、汞5种重金属含量均远低于GB 38400-2019标准限值,满足生态指标。

关键词：粉煤灰聚合氯化铝废渣化学组成硅肥有效硅含量

Multi-task Joint Feature Selection for Multi-label Classification

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Chinese Journal of Electronics 2015年第2期24卷 281-287页

作者： HE Zhifen YANG Ming liu huidong School of Mathematical Sciences Nanjing Normal University School of Computer Science and Technology Nanjing Normal University

Multi-label learning deals with each instance which may be associated with a set of class labels simultaneously. We propose a novel multi-label classification approach named MFSM(Multi-task joint feature selection for multi-label classification). In MFSM, we compute the asymmetric label correlation matrix in the label space. The multi-label learning problem can be formulated as a joint optimization problem including two regularization terms,one aims to consider the label correlations and the other is used to select the similar sparse features shared among multiple different classification tasks(each for one label).Our model can be reformulated into an equivalent smooth convex optimization problem which can be solved by the Nesterov’s method. The experiments on sixteen benchmark multi-label data sets demonstrate that our method outperforms the state-of-the-art multi-label learning algorithms.

关键词： Multi-label learning Multi-task learning Feature selection Label correlations

Beyond Conventional Degradation:Catalytic Solutions for Polyolefin Upcycling

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CCS Chemistry 2024年第2期6卷 313-333页

作者： Lan Gan Zhongwen Dong Haofeng Xu huidong Lv Guixia liu Fan Zhang Zheng Huang State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032 School of Chemistry and Material Sciences Hangzhou Institute of Advanced StudyHangzhou 310024 National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan) College of ChemistrySichuan UniversityChengdu 610064

Polyolefins(POs,i.e.,polyethylenes,ethylene/α-olefin copolymers,and polypropylenes)are the most ubiquitous synthetic macromolecular materials in modern life.Their widespread use and low recovery rate after extensive usage have caused significant resource waste and environmental concerns.Chemical recycling of POs provides an efficient approach to unravelling the polymer chain to various chemicals.However,conventional chemical recycling methods,including pyrolysis,hydrocracking,and oxidation,require high-energy input(typically>500℃)and/or the use of environmentally unfriendly chemicals,leading to complex product distribution.In this minireview,based on recent representative works,we summarize and highlight catalytic strategies addressing these issues in PO recycling from two perspectives:(1)employing advanced catalysts or technique designs to overcome the challenges in conventional chemical deconstruction approaches;and(2)developing novel tandem/cascade catalytic systems for highly selective PO upcycling under relatively mild conditions.We hope that this minireview will help researchers better understand the state of the art of PO chemical recycling and inspire more innovative and efficient ideas for this fast-developing field.

关键词： catalytic strategies chemical recycling deconstruction polyolefins upcycling

Influence of Si Content on Properties of Ti1-xSixN Coatings

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Journal of Wuhan University of Technology(Materials Science) 2019年第4期34卷 774-780页

作者：万强 liu Nian YANG Bing liu huidong CHEN Yanming School of Engineering Huazhong Agricultural UniversityWuhan 430070China School of Power & Mechanical Engineering Wuhan UniversityWuhan 430072China

To investigate the evolution of microstructure and wear behavior of TiSiN coatings with the variation of Si in targets and lays the foundation for its controllable mass production, Ti1-xSixN composite coatings were deposited onto Si(100) and cemented carbide substrates using TiSi targets with different Si content by cathodic arc ion plating. The influences of Si on the microstructure and mechanical properties were studied. Nano-amorphous composite structure appeared in the Ti1-xSixN coatings when Si content in TiSi target was higher than 5 at%. However, further increase of Si content in TiSi target exhibited a negligible effect on the microstructure of Ti1-xSixN coatings. Hardness and deformation resistance were correlated to the content of Si in TiSi targets. Maximum hardness was obtained as the Si content in target increased up to 20 at%. Friction coefficient and wear rate significantly decreased with addition of Si in TiN coating, and then dually increased with the increase of Si content in targets.

关键词： cathodic arc ion plating Ti(1-x)SixN coating silicon content nanocomposite mechanical properties wear resistance