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太阳能无人机机翼复合材料主梁铺层优化

复合材料科学与工程 2024年第3期 108-112页

作者：邓忠支亚非程家林杨文航空工业成都飞机工业(集团)有限责任公司成都610092

太阳能无人机采用超大展弦比机翼,巡航速度低,机翼载荷较小,不能负担过大的结构重量飞行,因此对飞机结构重量的要求严苛。太阳能无人机机翼主梁采用复合材料圆管的形式,机翼主梁占机翼结构的大部分重量,因此需要对机翼复合材料主梁的铺... 详细信息

太阳能无人机采用超大展弦比机翼,巡航速度低,机翼载荷较小,不能负担过大的结构重量飞行,因此对飞机结构重量的要求严苛。太阳能无人机机翼主梁采用复合材料圆管的形式,机翼主梁占机翼结构的大部分重量,因此需要对机翼复合材料主梁的铺层进行优化设计,以减轻机翼主梁的重量,优化主梁结构传力效果。首先建立了太阳能无人机单边机翼的有限元模型,然后依次对机翼复合材料主梁进行铺层形状优化、铺层厚度优化与铺层顺序优化,优化后机翼主梁重量下降18.68%,最大应力下降21.16%,翼尖变形下降5.9%。

关键词：太阳能无人机复合材料铺层优化

秦二厂3、4号机停机初中和池废水来源分析及优化

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电工技术 2024年第1期 198-200,204页

作者：于英杰周鹏程嘉林中核核电运行管理有限公司浙江嘉兴314300

由于技术规范对水质的要求,机组停机后一段时间内汽机二回路水排放均需先排放至废水中和池处理。秦二厂4号机408大修停机时发现废水中和池液位快速上涨,导致大量废水产生且有溢流风险。通过流程分析的方法,发现停机后凝汽器排水和循环... 详细信息

由于技术规范对水质的要求,机组停机后一段时间内汽机二回路水排放均需先排放至废水中和池处理。秦二厂4号机408大修停机时发现废水中和池液位快速上涨,导致大量废水产生且有溢流风险。通过流程分析的方法,发现停机后凝汽器排水和循环水管坑集水井排水导致了废水中和池液位快速上涨。在对各来水量进行细化计算的基础上,提出了推迟行政隔离的实施、蒸汽发生器排污废液经除盐床处理后参数合格直接进行排放及对冷却水进行节流等优化方式,并在3号机309大修中得到实施验证,解决了废水中和池来水问题,减少了废水产生和人力损耗。这种流程分析的方法对解决机组生产上的弱项起到很好的作用,对解决类似问题有一定借鉴意义。

关键词：大修二回路排水中和池优化

Mutually testing source-device-independent quantum random number generator

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Photonics Research 2022年第3期10卷 646-652页

作者： jialin cheng Jiliang Qin Shaocong Liang Jiatong Li Zhihui Yan Xiaojun Jia Kunchi Peng State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Quantum random numbers have an incomparable advantage over pseudo-random numbers since randomness originates from intrinsic property of quantum mechanics.The generation rate and the security of quantum random numbers are two significant indicators of a quantum random number generator(QRNG)for practical applications.Here we propose a mutually testing source-device-independent QRNG by simultaneously measuring a pair of conjugate quadratures from two separate parts of an untrusted continuous-variable quantum state.The amounts of randomness of the quadratures can be mutually estimated by each other via entropic uncertainty principle.Instead of randomly toggling between the conjugate quadratures of one state for collecting different types of data,two quadratures can generate check data and raw bits simultaneously and continuously in this mutually testing manner,which enhances the equivalent generation rate of private random bits to around 6 Gbit/s with a 7.5 mW laser beam.Moreover,the overall security is also improved by adjusting the conditional min-entropy in real time according to the continually monitored fluctuations of the local oscillator and the randomly measured electronic noise of homodyne detectors.

关键词： quantum random testing

新工科背景下基于OBE理念的材料加工技术基础教学改革探索研究

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创新创业理论研究与实践 2024年第1期7卷 48-51页

作者：张旭张炎杨宗辉成家林南京工程学院材料科学与工程学院江苏南京210000

该文基于我国新工科建设要求,围绕OBE(成果导向教育)教育理念,针对目前材料加工技术基础课程教学过程中存在的问题,对课程进行了教学改革探索:结合材料加工技术基础课程特点、内容深度及产业需求,设计了符合OBE教育理念的教学目标,并进... 详细信息

该文基于我国新工科建设要求,围绕OBE(成果导向教育)教育理念,针对目前材料加工技术基础课程教学过程中存在的问题,对课程进行了教学改革探索:结合材料加工技术基础课程特点、内容深度及产业需求,设计了符合OBE教育理念的教学目标,并进行了“四位一体”的教学模式探索。经过系列探索,课堂教学质量及学生学习效果得到显著提升,为高等工科院校材料专业课程的教学改革提供了思路。

关键词：新工科 OBE理念材料类专业材料加工技术教学改革人才培养

Acetate-assistant efficient cation-exchange of halide perovskite nanocrystals to boost the photocatalytic CO_(2) reduction

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Nano Research 2022年第3期15卷 1845-1852页

作者： jialin cheng Yanfei Mu Liyuan Wu Zhaolei Liu Ke Su Guangxing Dong Min Zhang Tongbu Lu MOE International Joint Laboratory of Materials Microstructure Institute for New Energy Materials and Low Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China

The judicious implantation of active metal cations into the surface of semiconductor nanocrystal(NC)through cation-exchange is one of the facile and viable strategies to enhance the activity of catalysts for photocatalytic CO_(2)reduction,by shortening the transfer pathway of photogenerated carriers and increasing the active sites simultaneously.However,cation-exchange is hard to achieve for halide perovskite NCs owing to the stable octahedron of[PbX6]4−with strong interaction between halogen and lead.Herein,we report a facile method to overcome this obstacle by replacing partial Br−with acetate(Ac−)to generate CsPbBr_(3) NC(coded as CsPbBr_(3−x)Ac_(x)).A small amount of Ac−instead of Br−does not change the crystal structure of halide perovskite.Owing to the weaker interaction between acetate and lead in comparison with bromide,the corresponding octahedron structure containing acetate in CsPbBr_(3−x)Ac_(x) can be easily opened to realize efficient cation-exchange with Ni^(2+) ions.The resulting high loading amount of Ni^(2+) as active site endows CsPbBr_(3−x)Ac_(x) with an improved performance for photocatalytic CO_(2)reduction under visible light irradiation,exhibiting a significantly increased CO yield of 44.09μmol·g^(−1)·h^(−1),which is over 8 and 3 times higher than those of traditional pristine CsPbBr_(3) and nickel doped CsPbBr_(3) NC,respectively.This work provides a critical solution for the efficient metal doping of low-cost halide perovskite NCs to enhance their photocatalytic activity,promoting their practical applications in the field of photocatalysis.

关键词： CO_(2)reduction halide perovskite nanocrystal cation-exchange photocatalysis surface doping

Cross-resistance and genetics of field-evolved resistance to chlorfenapyr in Plutella xylostella

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Insect Science 2024年第2期31卷 533-541页

作者： cheng Qian jialin Li Shuwen Wu Yihua Yang Yidong Wu Xingliang Wang Sanya Institute of Nanjing Agricultural Universty SanyaHainanChinaand College of Plant Protection Nanjing Agricultural UniversNanjingChina

Chlorfenapyr is a broad-spectrum halogenated pyrrole insecticide with a unique mode of action.Due to the misuse and overuse of this chemical,resistance has been reported in several arthropods,including Plutella xylostella,which is one of the most destructive insect pests afflicting crucifers worldwide.A better understanding of the cross-resistance and genetics of field-evolved chlorfenapyr resistance could effectively guide resistance management practices.Here,the chlorfenapyr resistance of a fieldderived population of P xylostella was introgressed into the susceptible IPP-S strain using a selection-assisted multigenerational backcrossing approach.The constructed nearisogenic strain,TH-BCsF2,shared 98.4%genetic background with the recurrent parent IPP-S strain.The TH-BCsF2 strain showed 275-fold resistance to chlorfenapyr,but no significant cross-resistance to spinosad,abamectin,chlorpyrifos,β-cypermethrin,indoxacarb,chlorantraniliprole,or broflanilide(no more than 4.2-fold).Genetic analysis revealed that resistance was autosomal,incompletely dominant,and conferred by 1 major gene or a few tightly linked loci.The synergism of metabolic inhibitors(PBO,DEM,and DEF)to chlorfenapyr was very weak(<1.7-fold),and the metabolic enzyme activities in the TH-BCsF2 strain were not significantly elevated compared with the IPP-S strain.The results enhances our understanding of the genetic traits of chlorfenapyr resistance,and provides essential information for improving resistance management strategies.

关键词： chlorfenapyr cross-resistance mode of inheritance near-isogenic line Plutellaxylostella

Continuous variable quantum conference network with a Greenberger-Horne-Zeilinger entangled state

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Photonics Research 2023年第4期11卷 533-540页

作者： YUE QIN JINGXU MA DI ZHAO jialin cheng ZHIHUI YAN XIAOJUN JIA State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Quantum conference(QC)is a cryptographic task in secure communications that involves more than two users wishing to establish identical secret keys among N users.The Greenberger–Horne–Zeilinger(GHZ)entangled state is the basic resource for quantum cryptographic communication due to the existence of multipartite quantum correlations.An unconditional and efficient quantum network can be established with a continuous variable(CV)GHZ entangled state because of its deterministic entanglement.Here,we report an implementation of QC scheme using a CV multipartite GHZ entangled state.The submodes of a quadripartite GHZ entangled state are distributed to four spatially separated users.The proposed QC scheme is proved to be secure even when the entanglement is distributed through lossy quantum channels and the collective Gaussian attacks are in the all lossy channels.The presented QC scheme has the capability to be directly extended to a larger scale quantum network by using entangled states with more submodes.

关键词： quantum state scheme

《龙虎武师》:口述历史、元电影与武打片中的生命强度

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电影评介 2022年第14期 92-95页

作者：程佳琳珠海科技学院马克思主义学院

2021年,一部拍摄制作完成于2020年的纪录片《龙虎武师》(魏君子,2020)在国庆档悄然上映。尽管票房成绩并不理想,却获得了观众的一致好评。“龙虎武师”这一称呼取自粤剧中的武行演员。在中国香港的电影行当中,武行演员主要负责动作场面... 详细信息

2021年,一部拍摄制作完成于2020年的纪录片《龙虎武师》(魏君子,2020)在国庆档悄然上映。尽管票房成绩并不理想,却获得了观众的一致好评。“龙虎武师”这一称呼取自粤剧中的武行演员。在中国香港的电影行当中,武行演员主要负责动作场面的替身与配角。本片通过数十位中国香港武行演员的现身讲述与经典电影中的打斗场面回顾,深情回望了中国香港武行与中国香港电影历经数十年的兴衰史,是一首献给龙虎武师与香港动作片的挽歌,也是在港片集体式微之后对中国香港电影黄金年代的回眸。

关键词：香港电影票房成绩香港动作片口述历史纪录片中国香港经典电影粤剧

层压复合材料连接接头设计及其在大飞机中的应用

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航空学报 2008年第3期29卷 640-644页

作者：程家林成都飞机工业(集团)有限责任公司技术中心四川成都610092

复合材料主承力接头的设计制造技术对拓宽复合材料在飞机结构上的应用范围,进一步减轻结构重量、提高疲劳性能和降低制造成本具有重要工程使用价值和发展应用前景。开展了平面环绕型层压板式复合材料承力接头的设计、分析与试验研究工... 详细信息

复合材料主承力接头的设计制造技术对拓宽复合材料在飞机结构上的应用范围,进一步减轻结构重量、提高疲劳性能和降低制造成本具有重要工程使用价值和发展应用前景。开展了平面环绕型层压板式复合材料承力接头的设计、分析与试验研究工作。提出了工程设计方案,通过理论推导,建立了环形接头危险部位的强度解析表达式并预测了具体接头设计的承载能力,同时完成了平面环绕型层压板复合材料接头的静力试验,试验结果与理论预测吻合良好。

关键词：复合材料主承力接头平面环绕型层压板设计强度理论预测静力试验