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Nano Research 2015年第8期8卷 2445-2466页

作者： chenyu wang1 Carrie Siu Jun Zhang Jiye Fang Department of Chemistry State University of New York at Binghamton Binghamton New York 13902 USA Materials Science and Engineering Program State University of New York at Binghamton Binghamton New York 13902 USA State Key Laboratory of Heavy Oil Processing College of Chemical Engineering China University of Petroleum Qingdao 266580 China

The assembly of nanocrystals into ordered structures called supercrystals or superstructures has become a pivotal frontier owing to numerous useful applications such as correlating the arrangements of atoms in macroscopic crystals and tuning the collective properties to meet the demands of various applications. In this article, recent progress in the preparation of three-dimensional superlattices of nanocrystals is outlined, with a particular emphasis on the driving forces and evolutionary routes beyond orderly assembly. First, the leading or repulsive forces that internally and externally govern the formation of three-dimensional supercrystals are systematically identified and discussed with respect to their origins and functions in three-dimensional self-organization. Then a synoptic introduction of commonly applied means of nanocrystal self-assembly based on growth scenarios such as droplet evaporation and a liquid/liquid interface is presented with specific cases and detailed analyses. Finally, the existing challenges and prospects for this field are briefly highlighted.

关键词： interparticle forces superlattices supercrystals three-dimensional self-assembly

有氧运动对心肌梗死患者内皮祖细胞动员和功能的影响

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中国组织工程研究 2025年第23期29卷 4947-4955页

作者：赵鹏王聪聪王晨宇郑州澍青医学高等专科学校河南省郑州市450064 中国人民武装警察部队后勤学院卫生勤务系天津市300309 郑州航空工业管理学院河南省郑州市450015

背景:运动康复是心肌梗死患者非药物治疗的重要手段,能够改善心肌灌注和心血管功能,其机制可能与血管内皮细胞介导的血管新生与修复有关,而内皮祖细胞是血管内皮细胞的前体细胞。目的:探讨12周有氧运动对心肌梗死患者内皮祖细胞动员和... 详细信息

背景:运动康复是心肌梗死患者非药物治疗的重要手段,能够改善心肌灌注和心血管功能,其机制可能与血管内皮细胞介导的血管新生与修复有关,而内皮祖细胞是血管内皮细胞的前体细胞。目的:探讨12周有氧运动对心肌梗死患者内皮祖细胞动员和功能的影响。方法:(1)选择2022年1-10月在郑州大学第一附属医院接受经皮冠状动脉介入治疗后的急性心肌梗死患者66例,按照随机数字表法分为运动组(n=33)和对照组(n=33),对照组患者接受常规心脏康复治疗12周,运动组患者接受常规心脏康复+12周有氧运动干预。干预前及干预结束后72 h,检测患者心肺适能、纽约心脏协会分级、左心室射血分数、血清肌钙蛋白Ⅰ和脑钠肽水平及外周血内皮祖细胞数量。(2)干预前及干预结束后72 h,从两组患者外周血中分离提取内皮组细胞,检测内皮组细胞的增殖、黏附和迁移能力。结果与结论:(1)干预结束后72 h,运动组患者的纽约心脏协会分级、血清肌钙蛋白Ⅰ和脑钠肽水平均低于干预前、对照组(P<0.05),峰值摄氧量、最大功率、递增负荷试验完成时间、峰值运动时左心室射血分数高于干预前、对照组(P<0.05),平均心率和平均主观疲劳感觉评分低于干预前、对照组(P<0.05),外周血内皮组细胞数量多于干预前、对照组(P<0.05);(2)干预结束后72 h,运动组患者外周血内皮祖细胞的增殖、黏附与迁移能力均高于干预前、对照组(P<0.05);(3)结果表明,规律有氧运动能够促进内皮祖细胞动员并增强其增殖、黏附和迁移能力,进而改善心肌梗死患者临床病情、心功能和心肺适能。

关键词：心肌梗死有氧运动内皮祖细胞血管生成心功能心肺适能

运动预处理联合骨髓间充质干细胞移植治疗大鼠心肌梗死

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中国组织工程研究 2025年第1期29卷 65-73页

作者：王治坤白少玄赵伟王晨宇郑州航空工业管理学院河南省郑州市450015 中国人民武装警察部队后勤学院天津市300309

背景:干细胞疗法在改善心肌梗死后心脏重构方面具有广阔前景,但心肌微环境改变影响干细胞疗效。运动预处理类似于缺血预处理,能够对心肌产生保护作用。然而,运动预处理与干细胞移植联合作用的效果与机制鲜有关注。目的:观察运动预处理... 详细信息

背景:干细胞疗法在改善心肌梗死后心脏重构方面具有广阔前景,但心肌微环境改变影响干细胞疗效。运动预处理类似于缺血预处理,能够对心肌产生保护作用。然而,运动预处理与干细胞移植联合作用的效果与机制鲜有关注。目的:观察运动预处理对心肌梗死大鼠骨髓间充质干细胞移植效果的影响,探讨局部炎症微环境在其中的作用机制。方法:80只雌性SD大鼠随机分为假手术组、模型组、移植组和联合组,每组20只。利用结扎冠状动脉左前降支的方法制作心肌梗死大鼠模型,假手术组仅穿线不结扎。移植组和联合组造模后于心肌内注射雄性大鼠来源骨髓间充质干细胞,此外,联合组在造模前还需进行8周跑台运动(即运动预处理)。干细胞移植后4周,采用递增负荷运动力竭实验测定运动能力,超声心动术测定心脏结构与功能,压力容积导管法检测左心室血液动力学,原位染色法进行心肌组织病理学观察并获取心肌胶原容积分数。干细胞移植后1,7 d和4周,采用定量反转录聚合酶链反应检测左心室促炎症因子(白细胞介素1β、白细胞介素6、肿瘤坏死因子α)、抗炎症因子(白细胞介素10)、Y染色体性别决定区和胚胎基因(心房钠尿肽、脑钠肽、β-肌球蛋白重链)m RNA表达量。结果与结论:(1)干细胞移植后4周:与假手术组比较,模型组运动能力、左心室射血分数降低(P 10 m RNA表达量下调(P 10 m RNA表达量无显著性变化(P> 0.05)。与移植组比较,联合组上述各指标均进一步改善(P1,7d:与移植组比较,联合组Y染色体性别决定区m RNA表达量升高(P1β、白细胞介素6(除移植后1 d)、肿瘤坏死因子α与Y染色体性别决定区m RNA表达量呈负相关(P 10与Y染色体性别决定区m RNA表达量呈正相关(P <0.05)。结果表明:运动预处理能够增强骨髓间充质干细胞移植治疗心肌梗死大鼠的效果,表现为心脏重构得到抑制、心功能进一步提升,其机制与心肌炎症微环境改善促进骨髓间充质干细胞滞留和存活有关。

关键词：运动预处理心肌梗死骨髓间充质干细胞心脏重构炎症反应微环境

Efficient privacy-preserving user authentication scheme with forward secrecy for industry 4.0

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Science China(Information Sciences) 2022年第1期65卷 192-206页

作者： chenyu wang Ding wang Guoai XU Debiao HE School of Cyber Security Beijing University of Posts and Telecommunications State Key Laboratory of Cryptology College of Cyber Science Nankai University Tianjin Key Laboratory of Network and Data Security Technology Nankai University School of Cyber Science and Engineering Wuhan University

Industry 4.0, which combines information technology, network and industrial production, is expected to have a tremendous impact on our daily lives. In such a complex and security-critical system with resource-constrained sensor nodes, the design of a secure user authentication scheme for preventing real-time data from unauthorized access is full of challenges, and the main crux lies in how to realize the important property of forward secrecy. Existing schemes either fail to achieve forward secrecy or achieve forward secrecy with high computation cost on sensor nodes. Besides, they often fail to conform to the development trend of industry 4.0 systems where a cloud center is necessary to help intelligent decision-making and alleviate computation and storage pressure. Therefore, in this paper, we propose an efficient privacy-preserving user authentication scheme with forward secrecy for industry 4.0, and formally prove its security in the random oracle model. Compared with previous schemes, it has three advantages:(1) all eleven state-of-the-art criteria are achieved;(2) its computation cost on sensor nodes is comparable to those insecure schemes that employ only symmetric cryptographic algorithms, and is superior to those that also use asymmetric cryptographic algorithms;(3) it takes the advantage of the computation and storage capabilities of the cloud center to achieve user anonymity and the resistance to offline dictionary attack without performing any asymmetric cryptographic algorithms on gateways. Our computation cost on gateways is the smallest among all state-of-the-art relevant schemes for comparison.

关键词： industry 4.0 wireless sensor networks password authentication forward secrecy offline dictionary attack

Numerical study on the hydrodynamics of agglomerates at intermediate Reynolds numbers

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Chinese Journal of Chemical Engineering 2020年第6期28卷 1533-1541页

作者： Huanpeng Liu Shaowei wang chenyu Yang Taiping Chen School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China

The flow pattern and hydrodynamics of a heterogeneous permeable agglomerate in a uniform upward flow at intermediate Reynolds numbers(1–40)are analyzed from three-dimensional(3 D)computational fluid dynamics *** from the homogeneous or stepwise-varying permeability models used in previous papers,a continuously radially varying permeability model is used in the present *** effects of two dimensionless parameters,the Reynolds number and the permeability ratio,on the flow field and the hydrodynamics were investigated in *** results reveal that unlike the solid sphere,a small recirculating wake initially forms inside the *** critical Reynolds number for the formation of the recirculating wake is lower than that of the solid sphere and it decreases with the increase of permeability ratio.A correlation of drag coefficient as a function of the Reynolds number and permeability ratio is *** of drag coefficients obtained by different permeability models show that at intermediate Reynolds numbers(1–40),the effect of radially varying permeability on the drag coefficient must be considered.

关键词： Agglomerate Permeability Reynolds number Drag coefficient

Prediction and Regulation of Delamination at Flexible Film/Finite-Thickness-Substrate Structure Interfaces

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Acta Mechanica Solida Sinica 2024年第2期37卷 238-251页

作者： Yutang Zhou Yunlong Xu Haoran Gong chenyu wang Department of Engineering Mechanics Northwestern Polytechnical UniversityXi’an710072China School of Instrumentation Science and Opto-Electronics Engineering Beihang UniversityBeijing100191China

Regulating the surface instability of thin film/substrate structures has been successfully applied to prepare new ductile electronic ***,such electronic devices need to be subjected to external loads during operation,which can easily induce delamination of the thin-film electronic device from the *** study aims to investigate the instability characteristics of hard films on flexible substrate surfaces from theoretical analysis and numerical simulation *** finite-thickness substrates,this paper establishes theoretical models for pure bending,bent wrinkle,partial delamination,and total delamination buckling of film/substrate structures based on the nonlinear Euler–Bernoulli beam theory and the principle of minimum energy;then the effects of material and geometric parameters of the structure,interfacial adhesion strength,and pre-strain on the evolutionary path of the four patterns are *** study results show that:the greater Young’s modulus of the substrate is,the larger the parameter region where partial delamination of the film/substrate structure occurs,and the smaller the parameter region where bent wrinkle *** varying Young’s modulus,thickness of the film and substrate,interfacial adhesion coefficient,and pre-strain,the buckling pattern of the structure can be predicted and *** parametric design intervals for each pattern are summarized in the phase *** results of this paper provide theoretical support for the design and reliability evaluation of flexible electronic devices.

关键词： Thin film/finite-thickness-substrate structure Delamination Surface instability Pattern evolution

Phase behaviors of ionic liquids attributed to the dual ionic and organic nature

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Communications in Theoretical Physics 2022年第9期74卷 370-384页

作者： chenyu Tang Yanting wang CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

Ionic liquids(ILs),also known as room-temperature molten salts,are solely composed of ions with melting points usually below 100℃.Because of their low volatility and vast amounts of species,ILs can serve as’green solvents’and’designer solvents’to meet the requirements of various applications by fine-tuning their molecular structures.A good understanding of the phase behaviors of ILs is certainly fundamentally important in terms of their wide *** review intends to summarize the major conclusions so far drawn on phase behaviors of ILs by computational,theoretical,and experimental studies,illustrating the intrinsic relationship between their dual ionic and organic nature and the crystalline phases,nanoscale segregation liquid phase,IL crystal phases,as well as phase behaviors of their mixture with small organic molecules.

关键词： ionic liquids phase behaviors nanoscale segregation liquid ionic liquid crystal

Hot-exciton effects on exciton diffusion and circular polarization dynamics in a single PbI_(2)nanoflake

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Science China(Technological Sciences) 2024年第1期67卷 83-90页

作者： XU chenyu wang Lei CUI Lin GAO BingRong wang HaiYu State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

As one of the emerging two-dimensional lead halide materials,lead iodide(PbI_(2))nanosheets have proven to possess strong application potential in the fields of high-energy radiation detection and highly efficient perovskite solar ***,the underlying photophysical properties such as hot-exciton-related carrier dynamics remain unclear for PbI_(2)***,we report the exciton dynamics of a single PbI_(2)nanoflake prepared by an aqueous solution *** a three-dimensional(3D)diffusion model,we obtain the exciton annihilation radius and diffusion coefficient of a single PbI_(2)nanoflake under nonresonant and resonant excitation conditions of band-edge exciton *** initial exciton densities increase,we find the carrier recombination mechanism for a single PbI_(2)nanoflake gradually changes from exciton-exciton annihilation to free-carrier ***,we reveal the room-temperature circular polarization of a single PbI_(2)nanoflake is due to free-carrier recombination with a band-edge exciton dissociation time of~120 fs under the resonant excitation condition.

关键词： single PbI_(2)nanoflake exciton diffusion room-temperature circular polarization ultrafast spectroscopy

Enhancing the robustness of object detection via 6G vehicular edge computing

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Digital Communications and Networks 2022年第6期8卷 923-931页

作者： Chen Chen Guorun Yao chenyu wang Sotirios Goudos Shaohua Wan School of Telecommunication Engineering Xidian UniversityXi'an710071China Department of Physics ELEDIA@AUTHAristotle University of Thessaloniki54124ThessalonikiGreece Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen518110China

Academic and industrial communities have been paying significant attention to the 6th Generation (6G) wireless communication systems after the commercial deployment of 5G cellular communications. Among the emerging technologies, Vehicular Edge Computing (VEC) can provide essential assurance for the robustness of Artificial Intelligence (AI) algorithms to be used in the 6G systems. Therefore, in this paper, a strategy for enhancing the robustness of AI model deployment using 6G-VEC is proposed, taking the object detection task as an example. This strategy includes two stages: model stabilization and model adaptation. In the former, the state-of-the-art methods are appended to the model to improve its robustness. In the latter, two targeted compression methods are implemented, namely model parameter pruning and knowledge distillation, which result in a trade-off between model performance and runtime resources. Numerical results indicate that the proposed strategy can be smoothly deployed in the onboard edge terminals, where the introduced trade-off outperforms the other strategies available.

关键词： 6G Vehicular edge computing Object detection Feature fusion Model compression Model deployment

Bioinspired 4D Printing Shape-Memory Polyurethane Rhinoplasty Prosthesis for Dynamic Aesthetic Adjustment

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Journal of Bionic Engineering 2024年第3期21卷 1397-1411页

作者： Jiaqi Liu Guiwei Li He Liu Jincheng wang Hui wang Xue Gao Qingping Liu chenyu wang Department of Plastic and Reconstructive Surgery The First Hospital of Jilin UniversityChangchun130021China Department of Orthopaedics The Second Hospital of Jilin UniversityChangchun130041China Key Laboratory of Bionic Engineering(Ministry of Education) Jilin UniversityChangchun130022China

The disparity between the postoperative outcomes of rhinoplasty and the expected results frequently necessitates secondary or multiple surgeries as a compensatory measure,greatly diminishing patient ***,there is renewed optimism for addressing these challenges through the innovative realm of Four-Dimensional(4D)*** groundbreaking technology enables three-dimensional objects with shape-memory properties to undergo predictable transformations under specific external ***,implants crafted using 4D printing offer significant potential for dynamic *** by worms in our research,we harnessed 4D printing to fabricate a Shape-Memory Polyurethane(SMPU)for use as a nasal augmentation *** choice of SMPU was guided by its Glass Transition Temperature(Tg),which falls within the acceptable temperature range for the human *** attribute allowed for temperature-responsive intraoperative self-deformation and postoperative *** chosen animal model for experimentation was *** into account the anatomical structure of the rabbit nose,we designed and produced nasal augmentation prostheses with superior *** prostheses were then surgically implanted in a minimally invasive manner into the rabbit ***,they exhibited successful temperature-controlled in-surgery self-deformation according to the predetermined shape and non-invasive remodeling within a mere 9 days *** histological evaluations confirmed the practical viability of these prostheses in a living *** research findings posit that worm-inspired 4D-printed SMPU nasal prostheses hold significant promise for achieving dynamic aesthetic adjustments.

关键词： 4D printing Shape memory polyurethane Rhinoplasty Self-deformation Dynamic aesthetic adjustment