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Ultrasensitive conductive hydrogels conferred by nanoscale synergistic effect

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Science China Materials 2025年第1期68卷 226-235页

作者： Gangrong Wang Xin Jing binghan Niu Liya Lin Yaoxun Zhang Jiazhou Zeng Peiyong Feng Yuejun Liu Hao-Yang Mi Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province Hunan University of TechnologyZhuzhou 412007China National&Local Joint Engineering Research Center for Advanced Packaging Material and Technology Hunan University of TechnologyZhuzhou 412007China National Engineering Research Center for Advanced Polymer Processing Technology Zhengzhou UniversityZhengzhou 450000China

The inherent limitations of hydrogels,such as low electrical conductivity and inadequate sensitivity,present considerable challenges in flexible electronic *** address these issues,we proposed an innovative synthesis technique that synergistically leveraged the nanoscale properties of the conductive fillers including one-dimensional polyaniline and two-dimensional reduced graphene oxide to fabricate hydrogels with exceptional *** advanced hydrogel exhibited an extraordinary sensitivity with a gauge factor of 27.55,impressive electrical conductivity(7.2 mS/cm),and outstanding ***,the hydrogel demonstrated excellent self-adhesion and robust selfhealing properties,attributed to its abundant catechol functionalities,hydrogen bonding interactions,andπ-π***,the flexible,strain-sensitive,self-powered sensors derived from these hydrogels displayed unparalleled sensing performance,positioning them as highly promising candidates for advanced human-computer interaction systems and sophisticated information transmission applications.

关键词： conductive hydrogels sodium alginate polyaniline sensitivity reduced graphene oxide

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基于改进蜣螂算法的机械臂时间最优轨迹规划

组合机床与自动化加工技术 2025年第1期 20-27页

作者：游智超卢振坤夏冰寒广西民族大学物理与电子信息学院南宁530006

针对电动汽车充电机械臂时间最优轨迹规划的问题,提出一种多策略改进的蜣螂优化算法YXDBO。以AR4六轴机械臂为研究对象,建立机械臂的运动学模型,并构造关节的运动轨迹。在蜣螂算法DBO的基础上,通过调幅三角形游走策略和改进的鲸鱼螺旋... 详细信息

针对电动汽车充电机械臂时间最优轨迹规划的问题,提出一种多策略改进的蜣螂优化算法YXDBO。以AR4六轴机械臂为研究对象,建立机械臂的运动学模型,并构造关节的运动轨迹。在蜣螂算法DBO的基础上,通过调幅三角形游走策略和改进的鲸鱼螺旋搜索策略,提高全局和局部搜索能力,并引入混沌映射初始化和变异算子扰动,得到改进的YXDBO算法。经CEC2022测试并与其他元启发式算法比较,改进算法求解性能表现优异。将该算法应用于机械臂的时间最优轨迹规划,在收敛速度和精度上明显优于PSO、WOA和DBO算法,关节运行时间缩短了32.159%,优化后的关节运动学曲线平滑连续,验证了该算法在工程类问题中的实用性。

关键词： 3-5-3多项式混沌映射调幅三角形游走鲸鱼螺旋搜索自适应t分布

再生纤维素基三明治结构复合薄膜的电磁屏蔽性能

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材料导报 2025年第2期39卷 239-244页

作者：张婷吴翠玲籍冰晗韩梦瑶杜雪岩兰州理工大学材料科学与工程学院兰州730050 兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室兰州730050

电磁辐射污染在工业、民用及军事等领域日趋严重,高性能的电磁干扰(Electromagnetic interference,EMI)屏蔽材料成为当前研究热点。以再生纤维素(Regenerated cellulose,RC)为基体,石墨烯(Graphene,GE)为导电填料,纳米Fe_(3)O_(4)为磁... 详细信息

电磁辐射污染在工业、民用及军事等领域日趋严重,高性能的电磁干扰(Electromagnetic interference,EMI)屏蔽材料成为当前研究热点。以再生纤维素(Regenerated cellulose,RC)为基体,石墨烯(Graphene,GE)为导电填料,纳米Fe_(3)O_(4)为磁性填料,采用沉浸相转化法和压制成型法制备了三明治结构GE/RC-Fe_(3)O_(4)/RC-GE/RC复合薄膜。研究了GE含量和薄膜厚度对复合薄膜EMI屏蔽性能的影响,探讨了其屏蔽机制。结果表明,随着GE含量和薄膜厚度的增大,复合薄膜的电导率和EMI屏蔽性能逐渐提高。当GE含量为20%(质量分数,如无特殊说明,下同)、薄膜厚度为0.84 mm时,复合薄膜的EMI屏蔽效能(Shielding effectiveness,SE)达到24.7 dB。同时,GE的添加增强了复合薄膜的拉伸强度,其最大值为12.2 MPa。本研究为绿色纤维素基电磁屏蔽复合薄膜的构筑提供了借鉴。

关键词：再生纤维素三明治结构复合薄膜电磁屏蔽石墨烯纳米Fe_(3)O_(4)

Applications of CeO2-based heterojunctions in photocatalytic bactericidal and antitumor therapy

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Journal of Rare Earths 2025年第3期 441-452页

作者： Chengzhang Zhu Qihang Tian binghan Wang Jiahui Liu Jiaao Han Shukun Le Peipei Liu Yang Wu Haitao Xu School of Environmental Science and Engineering Nanjing Tech University Inner Mongolia Key Laboratory of High-Value Functional Utilization of Low Rank Carbon Resources Chemical Engineering CollegeInner Mongolia University of Technology National Institute of Scientific Research-Energy Materialsand Telecommunications National Observation and Research Station of Coastal Ecological Environments in Macao Macao Environmental Research InstituteMacau University of Science and Technology Nanjing Gekof Institute of Environmental Pro tection Technology&Equipment Co. Ltd.

The rapid development of rare earth metal elements in the field of photocatalysis is due to their excellent optical and physicochemical *** from the unique external electronic structure of 4f15d16S2,superior electronegativity of the 4f orbitals,and strong oxygen storage-release ability in Ce4+/Ce3+reversible pairs,cerium dioxide（CeO2） has attracted increasing interest from ***,the fast recombination of photoinduced electron-hole pairs and wide energy band gap of bare CeO2significantly limit its practical *** overcome the above drawbacks,the construction of heterojunctions has been developed to broaden the absorption spectrum and accelerate the charge *** review presents a mini-review of the synthesis of CeO2-based heterojunctions including type Ⅱ,Z-scheme,and S-scheme photocatalysts,as well as the corresponding applications in photocatalytic bactericidal and antitumor ***,the latest advancements and potential perspectives on their future development are also discussed.

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微量生物炭表面酸性官能团质量摩尔浓度定量分析方法

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哈尔滨工业大学学报 2025年第2期57卷 65-72页

作者：李崯雪崔邴晗尚宏儒曹永娜程泽斌于艳玲哈尔滨工业大学郑州研究院郑州450000 哈尔滨工业大学化工与化学学院哈尔滨150001

表面官能团是生物炭的重要组成部分,其种类与数量对生物炭的性质、性能和应用有很大影响。现有碳材料表面官能团定量分析主要方法为Boehm滴定法,该方法耗炭量大、操作步骤多、耗时长。为此,通过构建质子消耗模型、编写Python程序、进行... 详细信息

表面官能团是生物炭的重要组成部分,其种类与数量对生物炭的性质、性能和应用有很大影响。现有碳材料表面官能团定量分析主要方法为Boehm滴定法,该方法耗炭量大、操作步骤多、耗时长。为此,通过构建质子消耗模型、编写Python程序、进行酸碱滴定实验、调试模型参数,建立一种微量生物炭表面官能团质量摩尔质量摩尔浓度定量分析方法,能够快速测量微量生物炭的表面官能团质量摩尔浓度与对应的酸解离常数p K_(a)。通过调整参数、训练模型,分析此方法适用的生物炭质量范围,发现测试样品质量为50 mg时模型的均方误差E_(MS)<0.002,迭代次数设置为20000时模型的E_(MS)<0.001,表明测量结果准确度较高。该方法测定的生物炭表面官能团总量与Boehm滴定法的相对误差在2%以内,且生物炭用量缩减95%、测量时间缩短10 h以上、实验操作步骤大幅简化,满足生物炭表面官能团定量分析微量、快速的技术需求。

关键词：生物炭表面官能团酸碱滴定定量分析方法

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Actinolactomycin,a New 2-Oxonanonoidal Antitumor Antibiotic Produced by Streptomyces flavoretus 18522,and its Inhibitory Effect on the Proliferation of Human Cancer Cells

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Chinese Chemical Letters 2005年第4期16卷 471-474页

作者： binghan ChengBinCUI BingCAI XiuFengJI XinShengYAO BeijingInstituteofPharmacologyandToxicology AMMSBeijing100850 TianjinInstituteforBiomedicinalResearch（TIBiR） Tanjin300384 ShenyangPharmaceuticalUniversity Shengyang110016／／3TianjinInstituteforBiomedicinalResearch（TIBiR）Fanjin300384 ShenyangPharmaceuticalUniversity Shengyang110016

Actinolactomycin 1, a new 2-oxonanonoidal antitumor antibiotic, was isolated from the fermentation broth of Streptomyces flavoretus 18522 through a bioassay-guided separation procedure. The structure of 1 was determined as 4,7-dihydroxy-3,9-dimethyl-2-oxonanone by the spectroscopic methods. Compound 1 inhibited the proliferation of A2780, K562, HCT-15, A549 and HeLa cells with the IC50 values of 1.4 ± 0.4 μmol/L, 8.4 ± 4.7 μmol/L, 9.4 ± 2.2 μmol/L, 15.4 ± 5.6 μmol/L and 13.7 ± 2.0 μmol/L, respectively. Flow cytometric analysis indicated that 1 could inhibit the cell cycle of tsFT210, A2780 and K562 cells mainly at the G0/G1 phase and could also induce apoptosis in K562 cells.

关键词： Actinolactomycin 2-oxonanonoid structure antitumor agent cell cycle inhibitor apoptosis inducer Streptomyces flavoretus.

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棕榈拟盘多毛孢对羊肚菌生长的影响

食用菌学报 2025年第1期32卷 35-43页

作者：李冰寒梁珍刘玥赵坤李林辉西华师范大学生命科学学院西南野生动植物资源保护教育部重点实验室四川南充637000 德阳市中西医结合医院四川德阳618000

为探究棕榈拟盘多毛孢(Pestalotiopsis trachicarpicola)病原菌对六妹羊肚菌(Morchella sextelata)生长的影响:检测病原菌对六妹羊肚菌菌丝体的损伤、子囊果的侵染、发酵和挥发性产物对菌丝体生长的影响;研究病原菌侵染过程中羊肚菌的... 详细信息

为探究棕榈拟盘多毛孢(Pestalotiopsis trachicarpicola)病原菌对六妹羊肚菌(Morchella sextelata)生长的影响:检测病原菌对六妹羊肚菌菌丝体的损伤、子囊果的侵染、发酵和挥发性产物对菌丝体生长的影响;研究病原菌侵染过程中羊肚菌的防御酶活性变化、对羊肚菌浸提液的利用情况及细胞壁降解酶活性。结果表明:棕榈拟盘多毛孢攀附缠绕羊肚菌菌丝,导致其皱缩枯萎;与正常子实体相比,病原菌侵染的羊肚菌子囊果组织结构被破坏;病原菌发酵液对羊肚菌菌丝体生长抑制率为7.6%;病原菌与羊肚菌共同培养至第6天时羊肚菌菌丝稀疏,气生菌丝较少;病原菌侵染的子实体SOD活性在第2天时最高,POD活性在第1天时最高,CAT活性在第2天时最低;在实验范围(72 h)内羊肚菌浸提液可促进病原菌分生孢子的萌发;病原菌能产生细胞壁降解酶,在第15天时,中性蛋白酶活性最高,第6天时,β-1,3葡聚糖酶活性最高,在第12天时,几丁质酶活性最高。研究结果可为探究棕榈拟盘多毛孢的致病机制提供参考。

关键词：羊肚菌棕榈拟盘多毛孢菌丝皱缩防御酶细胞壁降解酶

Revisiting processing time for metaphorical expressions： An eye-tracking study on eye-voice span during sight translation

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外语教学与研究 2018年第5期50卷 744-759页

作者： Zheng binghan Zhou Hao School of Modem Languages and Cultures Durham University Elvet Riverside New Elvet Durham DH 13JT United Kingdom

This paper aims to investigate the eye-voice span (EVS), the distance between eyeandvoice,insighttranslatingmetaphoricalexpressions(MEs).24MAtranslation students, with no professional translation or interpreting experience, were asked to conduct a sight translation (STR) task, and the processes were registered by eye-tracker and audio recorder. The qualified eye-tracking and audio data were further analysed by Tobii Studio and Audacity audio processing software. Our findings suggest that the time of the pause preceding an ME was largely, but not entirely, spent in processing the ensuing ME. However, due to the general existence of reading ahead activities in STR, the planning step for sight translating an ME takes place prior to the preceding pause; moreover, due to local processing difficulty causedbytheME,thetimeforreadingaheadintoME(temporalEVS)ismostlygreater than for reading ahead beyond ME. Our findings also reveal that the rate of methodological deviation(causedbythetwodifferentcalculationapproaches)forMEprocessingtimeis around10%,butthetwoprocessingtimeshavedemonstratednostatisticallysignificant difference, validating the processing time calculated by audio data in Zheng&Xiang (2013).We conclude this paper with some reservation on eye-tracking translation research:though powerful in providing solid and informative process data, it has some limitations in clearly probing into intricate human cognitive process.

关键词： sight translation metaphorical expression eye-voice span processing time eye-tracking

A mortar contact formulation using scaled boundary isogeometric analysis

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Science China(Physics,Mechanics & Astronomy) 2018年第7期61卷 87-90页

作者： Gao Lin binghan Xue ZhiQiang Hu Institute of Earthquake Engineering Faculty of Infrastructure Engineering Dalian University of Technology Dalian 116024 China State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024 China

Contact analysis is recognized as being the most challenging problem in computational mechanics, because the functional system of contact problems is nonlinear and non-smooth and the convergence and accuracy of contact algorithms are difficult to guarantee. In the traditional finite element method （FEM）-based contact analysis [1,2], the contact body is spatially discretized, and the contact boundary is described using a low-order Lagrange interpolation polynomial. While low-order Lagrange interpolation polynomial works well for planar and low-curvature surfaces [3], artificial oscillations in the contact force and numerical difficulties in the nonlinear solution algorithm occur when a large curvature or finite deformation is encountered [2].

关键词：边界 Lagrange 插值多项式放大接触分析接触算法计算力学接触问题