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Chinese Journal of Polymer Science 2013年第11期31卷 1579-1589页

作者： Wei Liu 孙明亮 Qian Liu Ben-lin He hong-lun ge Miao Sun Qin-jie Zhang 王玮 Institute of Material Science and Engineering Ocean University of China

Synthesis and electrochemical polymerization of 9,9-bis（2-（2-（2-methoxy ethoxy）ethoxy）ethyl）-fluorene （EO-F） into poly[9,9-bis（2-（2-（2-methoxy ethoxy）ethoxy）ethyl）-fluorene] （EO-PF） films are reported. The boron trifluoride diethyl etherate electrolyte enables facile preparation of EO-PF films at lower potential compared to LiCIOa/MeCN and the electrochemical polymerizations are discussed. The EO-PF shows good electrochemical behavior and can be dissolved in solvents such as DMSO and THF. The solubility of EO-PF in THF is 2 ***-1 and the number average molecular weight is 35300 with a polydispersity index of 1.65. The side chains on C9 position of the monomer maintain unchanged aRer electrooxidation into corresponding polymer. The EO-PF dissolved in THF under 365 nm ultraviolet light is sky blue light emitting with the Commission Internationale de L＇Eclairage-CIE coordinates of （0.19, 0.15）. The electropolymerized EO-PF is used for the first time in chemosensing metal ions, demonstrating fluorescence quenching for Mn2＋ and Fe3＋ while fluorescence enhancement for Cr6＋ ions.

关键词： 9,9-Bis(2-(2-(2-methoxyethoxy)ethoxy)ethyl)-fluorene Boron trifluoride diethyl etherate Chemosensoryresponse Electrochemical polymerization.

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Real-road NO_(x)and CO_(2)emissions of city and highway China-6 heavy-duty diesel vehicles

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Journal of Environmental Sciences 2025年第3期149卷 330-341页

作者： Zihao ge Wanyang Li Junfang Wang Yachao Wang Ying Huang Xin Wang Yunshan ge School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Weichai Power Co.Ltd. Weifang 261061China Chinese Research Academy of Environmental Sciences Beijing 100012China

The emission of heavy-duty vehicles has raised great concerns *** complex working and loading conditions,which may differ a lot from PEMS tests,raised new challenges to the supervision and control of emissions,especially during real-world ***-board diagnostics(OBD)technology with data exchange enabled and strengthened the monitoring of emissions from a large number of heavy-duty diesel *** paper presents an analysis of the OBD data collected from more than 800 city and highway heavy-duty vehicles in China using remote OBD data ***-world NO_(x)and CO_(2)emissions of China-6 heavy-duty vehicles have been *** results showed that city heavy-duty vehicles had higher NO_(x)emission levels,which was mostly due to longer time of low SCR temperatures below 180°*** application of novel methods based on 3BMAWalso found that heavy-duty diesel vehicles tended to have high NO_(x)emissions at ***,little difference had been found in work-based CO_(2)emissions,and this may be due to no major difference were found in occupancies of hot running.

关键词： Remote monitor On-Board diagnostics NO_(x)emission CO_(2)emission Heavy-duty vehicles

A polynomial resultant approach to algebraic constructions of extremal graphs

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Science China Mathematics 2025年第2期68卷 485-506页

作者： Tao Zhang Zixiang Xu gennian ge Institute of Mathematics and Interdisciplinary Sciences Xidian UniversityXi’an 710071China School of Mathematical Sciences Capital Normal UniversityBeijing 100048China

The Turán problem asks for the largest number of edges ex(n,H)in an n-vertex graph not containing a fixed forbidden subgraph H,which is one of the most important problems in extremal graph ***,the order of magnitude of ex(n,H)for bipartite graphs is known only in a handful of *** particular,giving explicit constructions of extremal graphs is very challenging in this *** this paper,we develop a polynomial resultant approach to the algebraic construction of explicit extremal graphs,which can efficiently decide whether a specified structure exists.A key insight in our approach is the multipolynomial resultant,which is a fundamental tool of computational algebraic *** main results include the matched lower bounds on the Turán number of 1-subdivision of K3,t1and the linear Turán number of the Berge theta hypergraph■_(3,t_(2))^(B).where t_(1)=25 and t_(2)=***,the constant t1improves the random algebraic construction of Bukh and Conlon(2018)and makes the known estimation better on the smallest value of t1concerning a problem posed by Conlon et al.(2021)by reducing the value from a magnitude of 10^(56)to the number 25,while the constant t_(2)improves a result of He and Tait(2019).

关键词： Turan number resultant algebraic construction subdivision Berge theta hypergraph

Effect of h-BN rods on high-temperature properties of alumina-carbon refractory

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Journal of Iron and Steel Research International 2025年第1期32卷 115-128页

作者： Ya-ge Li Shuai-bing Wu Feng Liang Zhong Huang Tu Long Long Dong Jun-yi Lv hong-juan Duan Biao Wen Yong Liu Hai-jun Zhang The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081HubeiChina Sinosteel Luoyang Institute of Refractories Research Co. Ltd.Luoyang471039HenanChina

h-BN rods modified low-carbon alumina-carbon(Al_(2)O_(3)-C)refractories were prepared,and the effect of h-BN rod addition on the high-temperature properties was investigated and compared with commercial h-BN flake,carbon black,and carbon nanotubes *** results demonstrated that Al_(2)O_(3)-C refractories containing h-BN rods exhibited optimal high-temperature service performances,including 25%higher hot modulus of rupture,21.3%higher thermal shock strength residual ratio,20.9%lower in oxidation and 44.3%less in slag corrosion,compared to the counterpart specimens without ***,benefiting from the synergistic enhancement of the rod-like h-BN and in-situ generated SiC whiskers,the high-temperature service performances of h-BN rods containing specimens outperformed counterpart specimens containing commercial h-BN flake,carbon black,and carbon nanotubes,respectively.

关键词： Al_(2)O_(3)-C refractory h-BN rod Microstructure High-temperature service performance

A fast amplitude preserving three-parameter 3D parabolic Radon transform and its application on multiple attenuation

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Petroleum Science 2025年第1期22卷 163-177页

作者： Ji-Tao Ma Kai-ge Zhao Zhen Liao College of geophysics China University of Petroleum (Beijing) State Key Laboratory of Petroleum Resources and Engineering China University of Petroleum (Beijing) CNPC Key Laboratory of geophysical Prospecting China University of Petroleum (Beijing)

Seismic wavefields propagate through three-dimensional(3D) space, and their precise characterization is crucial for understanding subsurface structures. Traditional 2D algorithms, due to their limitations, are insufficient to fully represent three-dimensional wavefields. The classic 3D Radon transform algorithm assumes that the wavefield's propagation characteristics are consistent in all directions, which often does not hold true in complex underground media. To address this issue, we present an improved 3D threeparameter Radon algorithm that considers the wavefield variation with azimuth and provides a more accurate wavefield description. However, introducing new parameters to describe the azimuthal variation also poses computational challenges. The new Radon transform operator involves five variables and cannot be simply decomposed into small matrices for efficient computation; instead, it requires large matrix multiplication and inversion operations, significantly increasing the computational load. To overcome this challenge, we have integrated the curvature and frequency parameters, simplifying all frequency operators to the same, thereby significantly improving computation efficiency. Furthermore,existing transform algorithms neglect the lateral variation of seismic amplitudes, leading to discrepancies between the estimated multiples and those in the data. To enhance the amplitude preservation of the algorithm, we employ orthogonal polynomial fitting to capture the amplitude spatial variation in 3D seismic data. Combining these improvements, we propose a fast, amplitude-preserving, 3D threeparameter Radon transform algorithm. This algorithm not only enhances computational efficiency while maintaining the original wavefield characteristics, but also improves the representation of seismic data by increasing amplitude fidelity. We validated the algorithm in multiple attenuation using both synthetic and real seismic data. The results demonstrate that the new algor

关键词： Three-parameter 3D Radon Orthogonal polynomial Amplitude-preserving Multiple attenuation

The influence mechanism of environmental factors on DGT adsorbing sulfonamides and the migration between water and sediment

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Journal of Environmental Sciences 2025年第5期151卷 347-359页

作者： Peng Zhang Jingfeng Yan Hao Ji Linke ge Yanying Li School of Environmental Science and Technology Shaanxi University of Science&TechnologyXi’an 710021China College of Environmental Sciences and Engineering Dalian Maritime UniversityDalian 116026China

Obtaining the sulfonamides(SAs)concentrations in the water body and sediment bulk was a prerequisite to reveal their transport and partitioning behavior in sediment-water environments and accurately assess their ecological *** the present study,the influences of multifactor interactions on the performance of o-DGTs with XAD-18 binding gels were analyzed by central combination experiments and response surfaces analysis,in which the target compounds were 9 *** results indicated that dissolved organic matter(DOM),pH,and suspended particulate matter(SS)had significant effects on the o-DGT sampling,whereas this o-DGT was independent of the ionic strength(IS).Concentning the composite influence of the four factors,the interaction between DOM and SS posed the most significant effect on all 9 SAs ***,an o-DGT and DIFSmodel was applied to explore the SAs migration between the water-sediments *** difference between desorption rate(k_(b))and adsorption rates(k_(f))values suggested that the kinetics of SAs was dominated by ***,the short-term sediment-water partitioning of SAs was clarified on the basis of distribution coefficient(K_(dl))for the labile SAs,among which the sulfadiazine(SDZ)had the largest labile *** ability of sediments to release SAs to the liquid phase as a sink was determined by response time(T_(c)).Among the 9 SAs,the longterm release of soseulfamethoxypyridazine(SMP)from the solid phase of sediments would have a potential risk to the aquatic environment,to which more attention should be paid in the future.

关键词： Sulfonamides O-DGT Water-sediments interface DIFS Distribution

Bulk photovoltaic effect in two-dimensional ferroelectric α-In2Se3

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Science China(Information Sciences) 2025年第2期68卷 285-292页

作者： Huiting WANG Shuaiqin WU Yan CHEN Qianru ZHAO Jinhua ZENG Ruotong YIN Yuqing ZHENG Chang LIU Shukui ZHANG Tie LIN hong SHEN Xiangjian MENG Jun ge Xudong WANG Junhao CHU Jianlu WANG State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Institute of OptoelectronicsFudan University Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Frontier Institute of Chip and System Fudan University

Non-centrosymmetric material systems can generate spontaneous photocurrent without a p-n junction under uniform illumination, which is known as the bulk photovoltaic effect（BPVE）. It has garnered significant attention for its application potential in the fields of energy harvesting and photoelectric detection. In this study, we report the BPVE observed in twodimensional ferroelectric α-In2Se3multilayer flakes. The reversal in spontaneous photocurrent polarity is observed and associated with the out-of-plane ferroelectric polarization direction. The spontaneous photocurrent originating from the shift current is also polarization-sensitive. The amplitude of spontaneous photocurrent is further increased by one order of magnitude through vacuum annealing. Our results provide a further application potential for new-generation photodetectors based on BPVE with low power consumption and multi-dimensional optoelectronic detection.

关键词： bulk photovoltaic effect 2D ferroelectrics 3R $\alpha$-In$_2$Se$_3$ shift current self-powered photodetection

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冻结方式对猪肝理化特性和蛋白质氧化的影响

食品工业科技 2025年第3期46卷 342-349页

作者：张鸽尤娟杨宏华中农业大学食品科学技术学院湖北武汉430023 华中农业大学环境食品学教育部重点实验室湖北武汉430023

为解决猪肝在冷冻贮藏过程中的品质劣变问题,本实验通过测定猪肝的冰晶微观结构、表面色度、挥发性盐基氮(TVB-N)值、硫代巴比妥酸(TBARs)值,以及猪肝蛋白质的羰基含量、巯基及二硫键含量、表面疏水性等指标,探究了-20℃常规空气冻结(Co... 详细信息

为解决猪肝在冷冻贮藏过程中的品质劣变问题,本实验通过测定猪肝的冰晶微观结构、表面色度、挥发性盐基氮(TVB-N)值、硫代巴比妥酸(TBARs)值,以及猪肝蛋白质的羰基含量、巯基及二硫键含量、表面疏水性等指标,探究了-20℃常规空气冻结(Conventional air freezing,CAF)、-80℃冰箱深冷冻结(Refrigerator cryogenic freezing,RCF)液氮浸渍冻结(Liquid nitrogen immersion freezing,LNF)3种冻结方式对冻藏猪肝理化特性和蛋白质氧化的影响(猪肝冻结后于-20℃贮藏180 d)。结果显示,随着贮藏时间的延长,猪肝鲜度品质下降、蛋白质氧化程度增加。与CAF相比,RCF和LNF组猪肝通过最大冰晶生成带的时间分别减少了71.60%和99.81%,生成的冰晶更加细小均匀。LNF组冻藏180 d后TVB-N和TBARs值分别比CAF组降低了28.43%和41.79%。冻藏180 d后,LNF组蛋白质羰基含量、二硫键含量和表面疏水性分别比CAF组降低38.88%、6.77%和21.04%,巯基含量比CAF组高8.60%,表明使用LNF能够有效延缓猪肝蛋白质的氧化。通过改变冻结方式提高冻结速率,降低冰晶对猪肝细胞组织的破坏程度,能够有效抑制猪肝在冻藏过程中品质的下降。本实验可为猪肝的冷冻贮藏及运输提供技术支撑。

关键词：猪肝冻结方式冻藏品质蛋白质氧化

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Escort: a system for rapid and long-term tracking of multiple insect objects

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Insect Science 2025年第1期32卷 356-362页

作者： Chengshi Wu Jin ge Bin Han Hengjing Lan Xian Zhou Zhuxi ge Weichan Cui Xiaofeng Liu Xianhui Wang College of AI and Automation Hohai UniversityChangzhouJiangsu ProvinceChina State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijingChina CAS Centre for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijingChina

Dear Editor,Accurately tracking multiple individuals in insect groups provides crucial information for insect collective behavior,population activity and interactions with the environment(Price et al.,201l).

关键词： collective ). multiple

Magnetically-responsive phase change thermal storage materials:Mechanisms,advances,and beyond

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Journal of Energy Chemistry 2025年第2期101卷 485-510页

作者： Yan Gao Yang Li Jinjie Lin Panpan Liu Xiao Chen ge Wang Beijing Advanced Innovation Center for Materials genome Engineering Beijing Key Laboratory of Function Materials for Molecule & Structure Construction School of Materials Science and Engineering University of Science and Technology Beijing School of Physics and Astronomy Beijing Normal University Shunde Graduate School University of Science and Technology Beijing

Rapid advances in thermal management technology and the increasing need for multi-energy conversion have placed stringent energy efficiency requirements on next-generation shape-stable composite phase change materials(PCMs).Magnetically-responsive phase change thermal storage materials are considered an emerging concept for energy storage systems,enabling PCMs to perform unprecedented functions(such as green energy utilization,magnetic thermotherapy,drug release,etc.).The combination of multifunctional magnetic nanomaterials and PCMs is a milestone in the creation of advanced multifunctional composite ***,a timely and comprehensive review of composite PCMs based on magnetic nanoparticle modification is still ***,we furnish an exhaustive exposition elucidating the cutting-edge advancements in magnetically responsive composite *** delve deeply into the multifarious roles assumed by distinct nanoparticles within composite PCMs of varying dimensions,meticulously scrutinizing the intricate interplay between their architectures and thermophysical ***,we prognosticate future research trajectories,delineate alternative stratagems,and illuminate prospective *** review is intended to stimulate broader academic interest in interdisciplinary fields and provide valuable insights into the development of next-generation magnetically-responsive composite PCMs.

关键词： Magnetic nanoparticles Magnetic-thermal conversion Phase change materials Response mechanism Thermal energy storage