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Preface to the special topic on active matter

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National Science Open 2024年第4期3卷 4-6页

作者： Ran Ni mingcheng yang H.P.Zhang School of Chemistry Chemical Engineering and Biotechnology Nanyang Technological University Beijing National Laboratory for Condensed Matter Physics and Laboratory of Soft Matter Physics Institute of Physics Chinese Academy of Sciences School of Physics and Astronomy Institute of Natural Sciences and MOE-LSC Shanghai Jiao Tong University

Active matter refers to systems composed of individual units that consume locally stored energy to generate mechanical motion. Examples of active matter include biological entities such as schools of fish, flocks of birds, bacterial colonies, and synthetic systems such as self-propelled colloidal particles and engineered nanobots. The study of active matter seeks to provide understanding for complex behaviors and emergent phenomena arising from interactions of these energy-consuming units, with implications for fields ranging from physics and biology to materials science and robotics.

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Spatio-temporal control of the phase separation of chemically active immotile colloids

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National Science Open 2024年第4期3卷 17-28页

作者： Yixin Peng Longfei Li Shutong Guo Xi Chen Chao Zhou Dingyu Xing Hepeng Zhang mingcheng yang Wei Wang School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China Beijing National Laboratory for Condensed Matter Physics and Laboratory of Soft Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physics and Astronomy Institute of Natural Sciences and MOE-LSCShanghai Jiao Tong UniversityShanghai 200240China School of Civil and Environmental Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

Understanding and controlling phase separation in nonequilibrium colloidal systems are of both fundamental and applied *** this article,we investigate the spatiotemporal control of phase separation in chemically active immotile *** show that a population of silver colloids can spontaneously phase separate into dense clusters in hydrogen peroxide(H_(2)O_(2))due to phoretic *** characteristic length of the formed pattern was quantified and monitored over time,revealing a growth and coarsening phase with different growth *** tuning the trigger frequency of light,the lengths and growth kinetics of the clusters formed by silver colloids in H_(2)O_(2)can be *** addition,structured light was used to precisely control the shape,size,and contour of the phase-separated *** study provides insight into the microscopic details of the phase separation of chemically active colloids induced by phoretic attraction,and presents a generic strategy for controlling the spatiotemporal evolution of the resulting mesoscopic patterns.

关键词： phase separation colloids active matter non-equilibrium structured light pattern formation

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考虑虚拟控制参数调节的风储联合调频优化模型预测控制

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电力系统保护与控制 2024年第16期52卷 37-48页

作者：王育飞张文韬杨铭诚黄敏丽于艾清薛花林顺富上海电力大学电气工程学院上海200090 国网上海市电力公司市北供电公司上海200040 上海勘察设计研究院(集团)有限公司上海200093

为提高大规模风电并网后电网频率稳定性,降低风储系统调频成本,提出考虑虚拟控制参数调节的优化模型预测控制策略。首先,计及储能系统对电网惯性水平与阻尼能力的作用,引入双曲正切函数自适应调节储能系统虚拟控制参数,满足不同时段的... 详细信息

为提高大规模风电并网后电网频率稳定性,降低风储系统调频成本,提出考虑虚拟控制参数调节的优化模型预测控制策略。首先,计及储能系统对电网惯性水平与阻尼能力的作用,引入双曲正切函数自适应调节储能系统虚拟控制参数,满足不同时段的调频需求。然后,基于风储系统状态方程建立预测模型,以频率偏差与调频成本最小为控制目标,设计自适应模型预测控制策略。最后,搭建仿真模型,在阶跃和连续负荷扰动工况下对不同控制策略的效果进行对比分析。结果表明,所提控制策略能够有效改善电网调频效果,优化储能系统和风电机组的出力,具有更优的协同控制性能。

关键词：风电机组储能系统一次调频虚拟控制参数模型预测控制

Radiation synthesis and characterization of polyacrylic acid hydrogels

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Nuclear Science and Techniques 2007年第2期18卷 82-85页

作者： yang mingcheng SONG Hongyan ZHU Chengshen HE Suqin School of Materials Science and Engineering Zhengzhou University Zhengzhou 450052 China Isotope Institute of Henan Academy of Sciences Zhengzhou 450015 China

The pH-sensitive polyacrylic acid (PAA) hydrogels were synthesized by gamma-ray irradiation at an am- bient temperature. The influences of dose, monomer concentration, cross-linking agent content, pH, and ionic strength on the swelling ratio (SR) of the PAA hydrogels were investigated in detail. The results show that the SR of the hy- drogel decreases with an increase in the dose, monomer concentration, and cross-linking agent content. In alkaline so- lution, the SR of the hydrogels is much higher than that in acid solution. Also, the ionic strength can influence the SR of the hydrogels. The more the concentration, the lower the

关键词：聚丙烯酸水凝胶辐射合成特性

Preparation and Characterization of Fe3O4 Magnetic Nano-particles by ^（60）Co γ-ray Irradiation

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Journal of Materials Science & Technology 2007年第2期23卷 182-184页

作者： mingcheng yang Hongyan SONG Chengshen ZHU Suqin HE Ya GAO School of Material Science and Engineering Zhengzhou University Zhengzhou 450052 China Isotope Institute of Henan Academy of Sciences Zhengzhou 450015 China

By using a new method, ^60Co γ-ray irradiation, Fe3O4 magnetic nano-particles were successfully synthesized at room temperature under ambient pressure. The structure, morphology and magnetic properties of these nanoparticles were characterized by X-ray diffraction （XRD）, transmission electron microscope （TEM） and vibrating sample magnetometer （VSM）, respectively. The radiation formation mechanism was also discussed. The results show that the absorbed dose can greatly influence the structure, morphology and magnetic properties of the products. XRD and TEM studies show that the product prepared by γ-ray irradiation （10 kGy） is pure FesO4 phase and the mean diameter of these nano-particles is about 21 nm. The Fe3O4 nano-particles synthesized by γ-ray irradiation （10 kGy） are mainly in small cubic shape and the size uniformity of these particles is good.

关键词： ^60Co γ-ray Irradiation Fe304 nano-particles Super-paramagnetism

Synthesis and properties of p(NIPA-co-NVP)/clay hydrogels by radiation polymerization

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Nuclear Science and Techniques 2007年第1期18卷 55-58页

作者： SONG Hongyan yang mingcheng ZHU Chengshen HE Suqin GAO Ya School of Materials Science and Engineering Zhengzhou University Zhengzhou 450052 China Isotope Institute of Henan Academy of Sciences Zhengzhou 450015 China

In this study,hydrogels of P(NIPA-co-NVP)/clay were synthesized byγ-ray *** thermo-sensitive hydrogels were made under different experimental conditions such as dose,monomer ratio,and con- tent of clay.X-ray diffraction shows that the layer distance between Na-clays is changed from 1.6 to 2.7 nm because Na-clay pieces can be intercalated or exfoliated by HTMAB,and that between P(NIPA-co-NVP)/clay pieces is 3.4 nm. The swelling property tests show that the LCST of P(NIPA-co-NVP) is higher than *** the increase of NVP content,LCST is *** the ratio of NIPA/NVP is 95/5,hydrogel shows the best swelling property and LCST is 37℃.LCST of P(NIPA-co-NVP)/clay hydrogel is not changed,but the strength and swelling properties are better.

关键词：共聚物粘土水凝胶辐射聚合作用合成性质 NIPA NVP

Active thermophoresis and diffusiophoresis

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Chinese Physics B 2022年第10期31卷 444-449页

作者： Huan Liang Peng Liu Fangfu Ye mingcheng yang Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics Institute of PhysicsChinese Academy of Sciences(CAS)Beijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Wenzhou Institute University of Chinese Academy of SciencesWenzhou 325001China Songshan Lake Materials Laboratory Dongguan 523808China

Thermophoresis and diffusiophoresis respectively refer to the directed drift of suspended particles in solutions with external thermal and chemical gradients, which have been widely used in the manipulation of mesoscopic particles. We here study a phoretic-like motion of a passive colloidal particle immersed in inhomogeneous active baths, where the thermal and chemical gradients are replaced separately by activity and concentration gradients of the active particles. By performing simulations, we show that the passive colloidal particle experiences phoretic-like forces that originate from its interactions with the inhomogeneous active fluid, and thus drifts along the gradient field, leading to an accumulation. The results are similar to the traditional phoretic effects occurring in passive colloidal suspensions, implying that the concepts of thermophoresis and diffusiophoresis could be generalized into active baths.

关键词： active matter colloid thermophoresis diffusiophoresis

碳元素对L12型高熵化合物合金组织及性能的影响

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有色金属工程 2024年第10期14卷 19-24页

作者：祖润锋杜兴蒿袁帅杨明澄段国升武保林张利沈阳航空航天大学材料科学与工程学院

在外加载荷作用下，L12型有序化合物合金易出现晶界脆性断裂，严重制约了其实用化进程。研究了碳元素对（Ni, Co, Fe）3（Al, Ti, Fe）型有序高熵化合物合金的组织以及性能的影响。结果表明：经室温变形以及高温退火处理后，含碳合金具... 详细信息

在外加载荷作用下，L12型有序化合物合金易出现晶界脆性断裂，严重制约了其实用化进程。研究了碳元素对（Ni, Co, Fe）3（Al, Ti, Fe）型有序高熵化合物合金的组织以及性能的影响。结果表明：经室温变形以及高温退火处理后，含碳合金具有不完全再结晶组织，并且在晶界处存在无序面心立方结构的纳米过渡层。该含碳合金在室温下屈服强度达到1 015 MPa,拉伸延伸率达到16%;在760℃条件下屈服强度达到900 MPa,拉伸延伸率达到10%。说明碳的加入有助于L12型化合物合金克服晶界脆性，获得良好的综合力学性能。

关键词：高熵化合物合金 C合金化力学性能不完全再结晶

Edge Transport and Self-Assembly of Passive Objects in a Chiral Active Fluid

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Chinese Physics Letters 2021年第12期38卷 85-90页

作者： Qing yang Huan Liang Rui Liu Ke Chen Fangfu Ye mingcheng yang Beijing National Laboratory for Condensed Matter Physics and Laboratory of Soft Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China Wenzhou Institute University of Chinese Academy of SciencesWenzhou 325001China

Topological edge flow and dissipationless odd viscosity are two remarkable features of chiral active fluids composed of active *** features can significantly influence the dynamics of suspended passive particles and the interactions between the *** computer simulations,we investigate the transport phenomenon of anisotropic passive objects and the self-assembly behavior of passive spherical particles in the active spinner *** is found that in confined systems,nonspherical passive objects can stably cling to boundary walls and are unidirectionally and robustly transported by edge flow of ***,in an unconfined system,passive spherical particles are able to form stable clusters that spontaneously and unidirectionally rotate as a *** these phenomena,strong particle-wall and interparticle effective attractions play a vital role,which originate from spinner-mediated depletion-like interactions and can be largely enhanced by odd viscosity of spinner *** results thus provide new insight into the robust transport of cargoes and the nonequilibrium self-assembly of passive intruders.

关键词： inner spherical viscosity