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4d过渡金属掺杂单层WS_(2)的电子结构和光学性质研究

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人工晶体学报 2025年第1期54卷 77-84页

作者：张宁宁鱼海涛刘艳艳薛丹西安科技大学理学院西安710600

WS_(2)凭借独特的物理和化学性质,在电子和光学领域展现出巨大的应用潜力。基于密度泛函理论的第一性原理计算方法,本文旨在研究单个4d过渡金属原子X(X=Nb、Mo、Tc、Ru、Rh、Pd)替代掺杂单层WS_(2)的电子结构和光学性质。结果表明,过渡... 详细信息

WS_(2)凭借独特的物理和化学性质,在电子和光学领域展现出巨大的应用潜力。基于密度泛函理论的第一性原理计算方法,本文旨在研究单个4d过渡金属原子X(X=Nb、Mo、Tc、Ru、Rh、Pd)替代掺杂单层WS_(2)的电子结构和光学性质。结果表明,过渡金属原子掺杂后的WS_(2)体系均是放热且稳定的,禁带宽度减小导致电导率增强,电子结构发生显著变化。其中Nb掺杂WS_(2)表现为金属性,Ru掺杂WS_(2)表现为半金属性,Tc、Rh和Pd掺杂WS_(2)诱导了磁性。Nb、Ru、Rh和Pd掺杂WS_(2)体系的介电常数和光折射率增加,掺杂前、后WS_(2)体系均具有良好的透明特性,吸收光谱发生红移,Nb、Ru、Rh掺杂WS_(2)在红外光区的吸收增强,Nb、Rh和Pd在可见光区的吸收增强,特别是Pd掺杂WS_(2)在可见光区吸收效果最佳,在光电探测器方面具有一定应用潜能。

关键词：二维材料单层WS_(2) 第一性原理掺杂电子结构光学性质

An efficient fully dynamic group signature with message dependent opening from lattice

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Cybersecurity 2021年第1期4卷 208-222页

作者： Yiru Sun yanyan liu State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of SciencesHaidian DistrictBeijingChina School of Cyber Security University of Chinese Academy of SciencesHuairou DistrictChina State Key Laboratory of Cryptology P.O.Box 515Xicheng DistrictBeijingChina

Message-dependent opening is one of the solutions to solve the problem of the tracing manager owns excessive *** this paper,we present a new lattice-based fully dynamic group signature scheme with message-dependent opening by combining an improved version of the fully dynamic group signature scheme proposed by Ling et al and the double encryption *** addition,we propose an improved underlying zero knowledge protocol,it has a soundness error 1 max(n,p)+1 that is better than the Stern-like protocol,which helps to bring down the communication complexity of the protocol and hence the signature *** scheme constrains the power of group managers by adding an admitter,and the signature size has a logarithmic relationship with the group size.

关键词： Dynamic group signature Message-dependent opening NIZK LWE SIS

Gas-liquid-liquid slug flow and mass transfer in hydrophilic and hydrophobic microreactors

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Chinese Journal of Chemical Engineering 2022年第10期50卷 85-94页

作者： yanyan liu Chaoqun Yao Guangwen Chen Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China

Gas-liquid-liquid three-phase slug flow was generated in both hydrophilic and hydrophobic microreactors with double *** bubble-droplet relative movement and the local mass transfer within the continuous slug and the dispersed droplet were *** was found that bubbles moved faster than droplets under low capillary number(Ca),while droplets moved faster upon the increase of Ca due to the increased *** the first time,we observed that the increased viscosity of droplets fastened the droplet *** mass transfer in the continuous slug was dominated by convection,leading to nearly constant global mass transfer coefficient(k_(L)a);while that in the dispersed droplet was dominated by diffusion,resulting in k_(L) decreasing along the *** features are analogical to the corresponding gas-liquid or liquid-liquid two-phase slug flow,but the formation of bubble-droplet clusters caused by relative movement lowered the absolute mass transfer *** results provide insights for the precise manipulation of gas-liquid-liquid slug flow in microreactors towards process optimization.

关键词： Mass transfer Multiphase flow Slug flow Microreactor Colorimetric method

CONTINUOUS AUXILIARY COVARIATE IN ADDITIVE HAZARDS REGRESSION FOR SURVIVAL DATA

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Journal of Systems Science & Complexity 2014年第6期27卷 1247-1262页

作者： SHI Xiaoping liu yanyan WU Yuanshan School of Mathematics and System Sciences Xinjiang University School of Mathematics and Statistics Wuhan University

This paper considers the additive hazards iliary covariate information to improve the efficiency regression analysis by utilizing continuous aux- of the statistical inference when the primary covariate is ascertained only for a randomly selected subsample. The authors construct a martingale based estimating equation for the regression parameter and establish the asymptotic consistency and normality of the resultant estimators. Simulation study shows that the proposed method can greatly improve the efficiency compared with the estimator which discards the auxiliary covariate information in a variety of settings. A real example is also provided as an illustration.

关键词： Additive hazards regression continuous auxiliary covariate estimating equation kernelsmoothing survival analysis.

Using expansion units to improve CO_(2) absorption for natural gas purification——A study on the hydrodynamics and mass transfer

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Chinese Journal of Chemical Engineering 2021年第1期34卷 35-46页

作者： Kai Zhu Chaoqun Yao yanyan liu Guangwen Chen Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China

The usage of capillary tubes for CO_(2) absorption suffers from small re sidence time,which leads to reduced performance for large *** work presents a method of connecting expansion units to capillary tubes to serve as a residence time *** effect of the expansion unit on gas-liquid hydrodynamics,pressure drop and mass transfer coefficient(k_(L)a) are investigated under various operating pressures up to 4.0 MPa,for both physical and chemical absorption.A novel periodic jetting flow is found in the expansion unit,which can intensify the CO_(2) *** results show that the strategy can significantly decrease the pressure drop while maintaining the absorption performance to a large *** overall k_(L)a for physical and chemical absorption are correlated to pressure drop,***,CO_(2) loading in rich absorbents increases dramatically compared to literature studies with only micromixers or capillary tubes,which is bene ficial to regenerate *** study verifies the concept that pre-treatment with water can largely reduce the usage of amine s,and can also provide a guide for process design in natural gas purification such as biogas recovery.

关键词： Microchannel Microreactor Separation Purification High pressure

Statistical inference methods and applications of outcome-dependent sampling designs under generalized linear models

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Science China Mathematics 2017年第7期60卷 1219-1238页

作者： YAN Shu DING JieLi liu yanyan School of Mathematics and Statistics Wuhan University Wuhan 430072 China

A cost-effective sampling design is desirable in large cohort studies with a limited budget due to the high cost of measurements of primary exposure *** outcome-dependent sampling(ODS) designs enrich the observed sample by oversampling the regions of the underlying population that convey the most information about the exposure-response *** generalized linear models(GLMs) are widely used in many fields,however,much less developments have been done with the GLMs for data from the ODS *** study how to fit the GLMs to data obtained by the original ODS design and the two-phase ODS design,*** asymptotic properties of the proposed estimators are derived.A series of simulations are conducted to assess the finite-sample performance of the proposed *** to a Wilms tumor study and an air quality study demonstrate the practicability of the proposed methods.

关键词： biased-sampling two-phase design generalized linear models empirical likelihood

Recent progress on surface chemistryⅡ:Property and characterization

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Chinese Chemical Letters 2025年第1期36卷 8-57页

作者： Xin Li Zhen Xu Donglei Bu Jinming Cai Huamei Chen Qi Chen Ting Chen Fang Cheng Lifeng Chi Wenjie Dong Zhenchao Dong Shixuan Du Qitang Fan Xing Fan Qiang Fu Song Gao Jing Guo Weijun Guo Yang He Shimin Hou Ying Jiang Huihui Kong Baojun Li Dengyuan Li Jie Li Qing Li Ruoning Li Shuying Li Yuxuan Lin Mengxi liu Peinian liu yanyan liu Jingtao Lü Chuanxu Ma Haoyang Pan JinLiang Pan Minghu Pan Xiaohui Qiu Ziyong Shen Qiang Sun Shijing Tan Bing Wang Dong Wang Li Wang Lili Wang Tao Wang Xiang Wang Xingyue Wang Xueyan Wang Yansong Wang Yu Wang Kai Wu Wei Xu Na Xue Linghao Yan Fan Yang Zhiyong Yang Chi Zhang Xue Zhang Yang Zhang Yao Zhang Xiong Zhou Junfa Zhu Yajie Zhang Feixue Gao Yongfeng Wang Center for Carbon-based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices School of ElectronicsPeking UniversityBeijing 100871China Spin-X Institute School of MicroelectronicsSouth China University of TechnologyGuangzhou 511442China School of Materials and Energy Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage DevicesGuangdong University of TechnologyGuangzhou 510006China Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China i-Lab CAS Key Laboratory of Nanophotonic Materials and DevicesSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of SciencesBeijing 100190China State Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced MaterialsJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts and TelecommunicationsNanjing 210023China Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Institute of Physics&University of Chinese Academy of Sciences Beijing 100190China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China College of Chemistry Beijing Normal UniversityBeijing 100875China Beijing National Laboratory for Molecular Sciences(BNLMS) College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China School

Surface with well-defined components and structures possesses unique electronic,magnetic,optical and chemical *** a result,surface chemistry research plays a crucial role in various fields such as catalysis,energy,materials,quantum,and *** science mainly investigates the correspondence between surface property and *** probe microscopy(SPM)techniques are important tools to characterize surface properties because of the capability of atomic-scale imaging,spectroscopy and manipulation at the single-atom *** this review,we summarize recent advances in surface electronic,magnetic and optical properties characterized mainly by SPM-based *** focus on elucidating theπ-magnetism in graphene-based nanostructures,construction of spin qubits on surfaces,topology properties of surface organic structures,STM-based light emission,tip-enhanced Raman spectroscopy and integration of machine learning in SPM studies.

关键词： Surface chemistry Scanning probe microscopy π-Magnetism Spin qubits Tip-enhanced Raman spectroscopy

KSHV strategies for host dsDNA sensing machinery

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Virologica Sinica 2016年第6期31卷 466-471页

作者： Hang Gao yanyan Song Chengrong liu Qiming Liang Department of Nephrology The Second Hospital of Jilin University Changchun 130041 China

The innate immune system utilizes pattern recognition receptors cyclic GMP-AMP synthase(cGAS)to sense cytosolic double-stranded(ds) DNA and initiate type 1 interferon signaling and autophagy pathway, which collaborate to limit pathogen infections as well as alarm the adaptive immune response. The genomes of herpesviruses are large dsDNA, which represent a major class of pathogen signatures recognized by cellular DNA sensor cGAS. However, to successfully establish the persistent infection, herpesviruses have evolved their viral genes to modulate different aspects of host immune signaling. This review summarizes the evasion strategies of host cGAS DNA sensing pathway by Kaposi's Sarcoma-associated Herpesvirus(KSHV) and their contributions to KSHV life cycles.

关键词： dsDNA interferon innate autophagy signaling modulate pathogen alarm initiate contributions

开放式创新动因模型与模式研究——以“互联网+医疗”为例

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科技和产业 2025年第2期25卷 315-321页

作者：游静刘严严魏祥健重庆科技大学管理学院重庆401331 重庆科技大学经济与金融学院重庆401331

开放式创新是推进新模式的重要支撑,已成为创新理论探讨和产业实践的热门话题,但如何着力于开放式创新动因并提升创新成效还亟待研究。探析开放式创新内外部动因,构建开放式创新动因模型,以“互联网+医疗”实践作为案例场景,使用开放式... 详细信息

开放式创新是推进新模式的重要支撑,已成为创新理论探讨和产业实践的热门话题,但如何着力于开放式创新动因并提升创新成效还亟待研究。探析开放式创新内外部动因,构建开放式创新动因模型,以“互联网+医疗”实践作为案例场景,使用开放式编码、主轴编码和选择性编码完成案例资料编码,归纳“互联网+医疗”开放式创新的动因包括机制创新、数据支持、通信技术、制度保障和资料保障,从而印证所构建的开放式创新动因模型。

关键词：开放式创新动因模型案例研究