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Spin of Micro-Propeller Structures Driven by High-Order Poincaré Beams

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激光与光电子学进展 2024年第5期61卷 572-577页

作者： Lin Qian Chen Lei Zhuang Zikuan Sun jingxuan zhang Li Xie Jianing Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology Foshan UniversityFoshan 528225GuangdongChina

The use of light-induced micro-motors or micro-propellers,showcasing non-contact and non-damaging characteristics,is garnering increased attention in biomedical,micro-machine,and environmental *** High-order Poincaré(HOP)beam,as a vector beam,provides a controllable driving force with adjustable orbital angular momentum and spin angular *** this study,we present the spin of a self-assembled micro-propeller structure propelled by the HOP beam,enabling flexible control over rotation velocity and *** findings reveal that modifications to the total angular momentum of the driving beam field or alterations in the micro-propeller blade structure can influence rotation *** research offers an efficient and versatile approach for applications in optical micromanipulation and micromachinery.

关键词： high-order Poincarébeam self-assemble propeller micro-propeller

Eco-friendly fractionation of natural straws:sustainable ultralong room-temperature phosphorescence and super anti-ultraviolet materials

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Science China Chemistry 2024年第7期67卷 2373-2381页

作者： Zhenghao Xia jingxuan You Haojie An Yirong Wang Jinming zhang Chunchun Yin Yaohui Cheng Kunfeng Jin Jun zhang CAS Key Laboratory of Engineering Plastics Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China HongDa Research Institute Co. Ltd.Beijing 100176China Key National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China

We demonstrate a new green solvent consisting of ionic liquid and polyol to achieve a selective fractionation of lignin from *** lignin from corn straw is rich in syringyl unit and phenolic hydroxyl group,resulting in excellent room-temperature phosphorescence(RTP)performance,antioxidation property and long-term *** film,fiber,aerogel and coatings with an ultralong RTP lifetime of 0.654 s are *** lignin from corn straw completely blocks UV light of290–400 nm at an extremely low usage due to many p-coumarate *** the content is as low as 1.54 mg/g,which is two orders of magnitude lower than the previous reports,the corresponding sunscreen cream has a super-high sun protection factor(SPF)of *** importantly,the lignin self-assembles into nanospheres of 250–350 nm,preventing penetration into the *** easily-available,abundant,low-cost,safe and natural lignin provides an innovative avenue for sustainable optical function materials.

关键词： lignin phosphorescence anti-ultraviolet biomass ionic liquids

Epigenetics:Mechanisms,potential roles,and therapeutic strategies in cancer progression

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Genes & Diseases 2024年第5期11卷 300-314页

作者： Dong Wang Yan zhang Qingbo Li Yu Li Wen Li Ao zhang jingxuan Xu Jingyan Meng Lin Tang Shuhua Lyu Graduate School Tianjin University of Traditional Chinese MedicineTianjin 301617China College of Traditional Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjin 301617China Department of Pathology Tianjin Union Medical CenterTianjin 300121China

Mutations or abnormal expression of oncogenes and tumor suppressor genes are known to cause *** studies have shown that epigenetic modifications are key drivers of cancer development and ***,the mechanistic role of epigenetic dysregulation in the tumor microenvironment is not fully ***,we reviewed the role of epigenetic modifications of cancer cells and non-cancer cells in the tumor microenvironment and recent research advances in cancer epigenetic *** addition,we discussed the great potential of epigenetic combination therapies in the clinical treatment of ***,there are still some challenges in the field of cancer epigenetics,such as epigenetic tumor heterogeneity,epigenetic drug heterogeneity,and crosstalk between epigenetics,proteomics,metabolomics,and other omics,which may be the focus and difficulty of cancer treatment in the *** conclusion,epigenetic modifications in the tumor microenvironment are essential for future epigenetic drug development and the comprehensive treatment of *** combination therapy may be a novel strategy for the future clinical treatment of cancer.

关键词： Cancer Epigenetics Gene expression Heterogeneity Tumor microenvironment

Mining authorship characteristics in bug repositories

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Science China(Information Sciences) 2017年第1期60卷 100-115页

作者： He JIANG jingxuan zhang Hongjing MA Najam NAZAR Zhilei REN School of Software Dalian University of Technology Key Laboratory for Ubiquitous Network and Service Software of Liaoning Province State Key Laboratory of Software Engineering Wuhan University

Bug reports are widely employed to facilitate software tasks in software maintenance. Since bug reports are contributed by people, the authorship characteristics of contributors may heavily impact the performance of resolving software tasks. Poorly written bug reports may delay developers when fixing bugs. However,no in-depth investigation has been conducted over the authorship characteristics. In this study, we first leverage byte-level N-grams to model the authorship characteristics and employ Normalized Simplified Profile Intersection(NSPI) to identify the similarity of the authorship characteristics. Then, we investigate a series of properties related to contributors’ authorship characteristics, including the evolvement over time and the variation among distinct products in open source projects. Moreover, we show how to leverage the authorship characteristics to facilitate a well-known task in software maintenance, namely Bug Report Summarization(BRS). Experiments on open source projects validate that incorporating the authorship characteristics can effectively improve a stateof-the-art method in BRS. Our findings suggest that contributors should retain stable authorship characteristics and the authorship characteristics can assist in resolving software tasks.

关键词： software maintenance bug repositories authorship characteristics bug report summarization

Sedimentary and diagenetic facies of tidal flat in epeiric sea and its related descriptive method-a case of Ma51-4 submember in Jingbian gas field of Ordos basin,China

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Petroleum 2021年第2期7卷 123-134页

作者： Xi zhang Haihua Zhu Bianjun Lei jingxuan zhang Dongxu Wang Jinjie Yong School of Geoscience and Technology Southwest Petroleum UniversityChengdu610500China Royal Melbourne Institute of Technology University MelbourneVIC3001Australia PetroChina Changqing Oilfield Company Xi’an710018China

The Ma5_(1-4)submembers of Jingbian gas field in Ordos basin of China belongs to epeiric sea evaporative carbonate tidal flat *** zone of gypsum nodule dolostone and upper part of intertidal zone of gypsum crystal dolostone are most favorable *** carbonate rocks of Ma5_(1-4)had undergone complex ***-poraneous dolomitization and gypsification provided the material foundation of the *** selective dissolution of gypseous dolostone constructs the origin shape of pore *** dissolution and filling of various minerals in the burial period determine whether the early dissolution pores can be preserved,and the final state of the *** dissolution and filling of various minerals determined the preservation of early dissolved pores and the final condition of the *** concept of“minus cement porosity”directly reflects that sedimentary facies have great influence on the growth of reservoir in Ma5_(1-4).Combined with sedimentary microfacies and diagenetic facies,a concise numerical symbol is used to express semiquantitatively sed-imentary microfacies and diagenesis *** descriptive method has great benefit in reservoir evaluation and prediction.

关键词： Ordos Ma51-4 submember Minus cement porosity Sedimentary microfacies Diagenesis

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6G无线覆盖扩展技术

中国科学：信息科学 2024年第5期54卷 1144-1176页

作者：许晓东韩书君赵芸王静贤何睿斯王德胜侯延昭费泽松张雪菲侯利明郭婧艾渤牛勇熊轲王方刚章嘉懿沈霞杜滢刘玲杜清河王碧舳孙梦颖张静璇谭力北京邮电大学信息与通信工程学院北京100876 北京邮电大学网络空间安全学院北京100876 北京邮电大学电子工程学院北京100876 鹏城实验室深圳518055 中国移动通信有限公司研究院北京100053 中国电子科技集团有限公司电子科学研究院北京100041 北京交通大学电子信息工程学院北京100091 北京交通大学计算机与信息技术学院北京100091 华中科技大学电子信息与通信学院武汉430074 北京理工大学信息与电子学院北京100041 中信科移动通信技术股份有限公司北京100083 中国信息通信研究院北京100191 中国科学院计算技术研究所北京100190 西安交通大学信息与通信工程学院西安710049

根据国际电信联盟关于IMT-2030愿景,第6代移动通信系统(the 6th generation mobile networks,6G)的覆盖服务需求将从单场景覆盖向多场景覆盖扩展,6G基础设施的部署也将逐步从2D覆盖向3D覆盖扩展、从局部覆盖向全球覆盖扩展、从中低频段... 详细信息

根据国际电信联盟关于IMT-2030愿景,第6代移动通信系统(the 6th generation mobile networks,6G)的覆盖服务需求将从单场景覆盖向多场景覆盖扩展,6G基础设施的部署也将逐步从2D覆盖向3D覆盖扩展、从局部覆盖向全球覆盖扩展、从中低频段融合使用向更高频段按需开启.上述需求使得6G在提升容量的同时,需要进一步考虑无线覆盖扩展需求.本文针对如何在6G网络结构时空尺度跨度大、全场景业务需求差异大、超密集覆盖能耗大等关键挑战下实现容量和能效约束下的覆盖能力扩展这一重大科学问题,首先提出了面向6G无线覆盖扩展的智能柔性组网架构;其次研究了面向6G无线覆盖扩展的关键技术,包括面向6G广域覆盖的多维立体空天地覆盖扩展技术、面向深度覆盖的超密集异构覆盖扩展技术和面向6G平滑度覆盖的超高速移动覆盖扩展技术;接着分析了基于语义通信的覆盖扩展技术;最后给出了6G全场景无线覆盖扩展仿真验证,通过定义6G无线覆盖扩展技术指标体系,进行了典型场景的覆盖性能仿真验证.

关键词： 6G 无线覆盖扩展组网架构关键技术指标体系

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DeepDir: a deep learning approach for API directive detection

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Science China(Information Sciences) 2021年第9期64卷 238-240页

作者： jingxuan zhang He JIANG Shuai LU Ge LI Xin CHEN College of Computer Science and Technology Nanjing University of Aeronautics and Astronautics State Key Laboratory for Novel Software Technology Nanjing University Key Laboratory of Complex Systems Modeling and Simulation Ministry of Education School of Software Dalian University of Technology School of Electronic Engineering and Computer Science Peking University School of Computer Science and Technology Hangzhou Dianzi University

Dear editor,Software developers tend to reuse existing libraries to facilitate their development process and implement certain functionalities by invoking application programming interfaces(APIs) [1]. However, it remains a challenging task for developers to correctly use APIs [2], so they often consult API learning resources [3, 4]. As one of the most important API learning resources,

关键词： API Specification API Directive Deep Learning Text Classification Imbalanced Learning

The preparation and performance analysis of zirconium-modified aluminum phosphate-based high-temperature(RT-1500℃)resistant adhesive for joining alumina in extreme environment

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Journal of Advanced Ceramics 2024年第7期13卷 911-932页

作者： jingxuan Liu Yange Wan Bo Xiao Jiancun Li Zhanming Hu Ruoyu zhang Xiaoxia Hu Jiachen Liu Guoshuai Cai Hongli Liu Mingchao Wang College of Science Civil Aviation University of ChinaTianjin 300300China Department of Safety Engineering Civil Aviation University of ChinaTianjin 300300China Binzhou Beicheng Construction Engineering Materials Testing Co. Ltd.Binzhou 256602China Department of Aviation Engineering Civil Aviation University of ChinaTianjin 300300China School of Materials and Engineering Key Lab of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China

High-temperature-resistant adhesives are critical materials in the aerospace *** zirconium-modified aluminum phosphate-based adhesives developed in this work had the advantage of adjustable thermal expansibility,achieving a high matching of coefficient of thermal expansion(CTE)with *** introduction of zirconium can significantly improve the thermal stability of the adhesive matrix,and the Zr/Al ratio substantially affects the various reaction processes inside the adhesive,especially the types of zirconium-containing *** of the zirconium-containing compounds in the A7Z3 adhesive were ZrO2 only when the mass ratio of zirconium hydroxide to aluminum hydroxide was 3:7,which was the key reason why it had the highest *** room-temperature bonding strength of A7Z3 after heat treatment at 1500℃reached 67.2 *** pretreatment at 1500℃,the high-temperature bonding strength of A7Z3 was greater than 50 MPa in the range of(room temperature)RT-1000℃.After 40 thermal cycles between RT and 1500℃,the bonding strength still reached 10 *** bonding occurred at temperatures below 1000℃,while chemical bonding dominated above 1000℃based on the generation of Al5BO9 and mullite at the interfaces.

关键词： high-temperature-resistant adhesive thermal expansion property zirconium-modified aluminum phosphate bonding performance thermal cycling bonding mechanism

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氦气压气机反动度与流动损失关联性分析

核动力工程 2023年第5期44卷 54-63页

作者：孙泽秦张靖煊中国科学院上海高等研究院上海201210 中国科学院大学北京101408

多级轴流氦气压气机是氦气轮机的关键部件之一,通常采用高反动度设计提升单级焓增以减少级数,但经验表明高反动度往往导致效率降低,因此在采用高反动设计时有必要澄清反动度对流动损失的影响。本文以不同反动度的氦气压气机为研究对象,... 详细信息

多级轴流氦气压气机是氦气轮机的关键部件之一,通常采用高反动度设计提升单级焓增以减少级数,但经验表明高反动度往往导致效率降低,因此在采用高反动设计时有必要澄清反动度对流动损失的影响。本文以不同反动度的氦气压气机为研究对象,利用计算流体动力学(CFD)方法详细分析了基于氦气流动的压气机叶片通道内部的叶型损失、角区损失和叶顶泄漏损失与反动度的关联性。结果表明,在100%反动度动叶和50%反动度静叶中,由于通道内相对速度较高,导致叶型损失更大,且随着反动度增高,动叶中的负荷提高导致叶顶泄漏处的损失加大,同时,静叶弯曲角的增大和展向压差使得静叶角区分离流更为严重。在100%反动度下,叶顶泄漏损失占动叶栅损失的53%,角区损失占静叶栅损失的60%。此外,本研究基于空气压气机叶型损失模型,通过物性分析优化了适用于氦气压气机的叶型损失模型。

关键词：氦气压气机反动度损失模型数值模拟