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Acyclic Total Colorings of Planar Graphs without l Cycles

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Acta Mathematica Sinica,English Series 2011年第7期27卷 1315-1322页

作者： Xiang yong suN jian Liang WU School of Statistics and Mathematics Shandong Economic University Ji'nan 250014 P. R. China School of Mathematics and Systems Science Shandong University Ji'nan 250100 P. R. China

A proper total coloring of a graph G such that there are at least 4 colors on those vertices and edges incident with a cycle of G, is called acyclic total coloring. The acyclic total chromatic number of G is the least number of colors in an acyclic total coloring of G. In this paper, it is proved that the acyclic total chromatic number of a planar graph G of maximum degree at least k and without 1 cycles is at most △（G）＋ 2 if （k, l） ∈ {（6, 3）, （7, 4）, （6, 5）, （7, 6）}.

关键词： Acyclic total coloring cycle planar graph

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杀菌条件对蓝点马鲛鱼脂质及风味品质的影响

渔业科学进展 2025年第1期46卷 222-230页

作者：王善宇简冲薛勇赵玲孙慧慧曹荣中国水产科学研究院黄海水产研究所山东青岛266071 青岛海洋科技中心海洋药物与生物制品功能实验室山东青岛266237 中国海洋大学食品科学与工程学院山东青岛266003

为探究不同杀菌条件对蓝点马鲛鱼(Scomberomorus niphonius)品质的影响,本文研究了110℃、46.4 min(A组),115℃、14.7 min(B组)和121℃、3.7 min(C组)3种杀菌条件对鱼肉感官品质、脂质组成及风味的影响。结果显示,杀菌后蓝点马鲛鱼的质... 详细信息

为探究不同杀菌条件对蓝点马鲛鱼(Scomberomorus niphonius)品质的影响,本文研究了110℃、46.4 min(A组),115℃、14.7 min(B组)和121℃、3.7 min(C组)3种杀菌条件对鱼肉感官品质、脂质组成及风味的影响。结果显示,杀菌后蓝点马鲛鱼的质地、滋味和气味的感官评分变化明显。样品中的总脂、甘油三酯和磷脂含量在杀菌后均显著降低(P<0.05),游离脂肪酸含量显著升高(P<0.05)。不同杀菌组间脂质组成存在差异,C组样品的脂质损失程度最高。脂质氧化程度受杀菌条件的影响显著(P<0.05),过氧化值(POV)含量均显著升高、硫代巴比妥酸反应值(TBARS)含量显著降低(P<0.05)。电子鼻分析结果表明,不同杀菌条件处理后鱼肉的气味特征明显不同。借助气相色谱-离子迁移谱从4组样品中鉴别出22种挥发性化合物,各组间的挥发性物质存在明显差异,其中,己醛、戊醛、异戊醛、3-戊酮、环己酮、3-羟基丁-2-酮和乙酸乙酯等是鱼肉中的主要风味物质,在B组样品中含量最高。综上,采用115℃、14.7 min(B组)杀菌的样品,其感官和风味品质明显优于其他组,且脂质氧化程度更低。研究结果可为蓝点马鲛鱼罐头产品加工提供参考。

关键词：蓝点马鲛鱼杀菌条件感官品质脂质挥发性物质风味

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Atomic Tunneling Effect in Two-Component Bose-Einstein Condensates with a Coupling Drive

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Communications in Theoretical Physics 2004年第2X期42卷 229-234页

作者： JIAOZhi-yong YUZhao-Xian YANGXin-jian DepartmentofAppliedPhysics UniversityofPetroleum(EastChina)Dongying257061China

In this paper, we have studied the atomic population difference and the atomic tunneling current of twocomponent Bose-Einstein condensates with a coupling drive. It is found that when the two-component Bose-Einstein condensates are initially in the coherent states, the atomic population difference may exhibit the step structure, in which the numbers of the step increase with the decrease of the Rabi frequency and with the increment of the initial phase difference. The atomic population difference may exhibit collapses, and revivals, in which their periods are affected dramatically by the Rabi frequency and the initial phase difference. The atomic tunneling current may exhibit damping oscillation behaviors, and exist the step structure for the time range of 10-10 ～ 10-9 second.

关键词：原子隧道效应二分量玻色-爱因斯坦凝聚耦合驱动相干态原子数差异原子物理学

Mechanically Strong and Flame‑Retardant PBO/BN/MXene Nanocomposite Paper with Low Thermal Expansion Coefficient,for Efficient EMI Shielding and Heat Dissipation

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Advanced Fiber Materials 2023年第5期5卷 1657-1670页

作者： yong Liu Ning Zhao jian Xu Beijing National Laboratory for Molecular Sciences Laboratory of Polymer Physics and ChemistryInstitute of ChemistryChinese Academy of SciencesBeijing 100190People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China College of Chemistry and Environmental Engineering Shenzhen UniversityGuangdong 518060People’s Republic of China

As portable and wearable electronic devices are rapidly developing,there is an urgent need for flexible and robust thermally conductive electromagnetic interference shielding materials to address the associated electromagnetic pollution and overheating ***,multifunctional poly(p-phenyl-2,6-phenylene bisoxazole)nanofiber/boron nitride nanosheet/Ti_(3)C_(2)T_(x)MXene nanosheet(PBO/BN/MXene)composite papers are prepared by a gel microparticle-mediated ordered assembly process with the aid of vacuum-assisted ***-like“brick and mortar”structure,segregated structure and sandwich structure are integrated into the composite paper,so that efficient thermally and electrically conductive networks have been *** the BN and MXene contents are 29.2 wt%and 41.7 wt%,the 13μm thick composite paper exhibits an EMI shielding performance of 31.8 dB and a thermal conductivity of 26.1 W/mK,markedly superior to those of the control samples without the ordered ***,because of the unique architecture and inherent advantages of the building blocks,the composite paper exhibits extremely low coefficient of thermal expansion(~1.43 ppm/K),excellent mechanical properties,and outstanding thermal stability and flame retardance,making it highly advantageous for practical applications in electronic *** work offers a promising approach for fabricating high-performance multifunctional composites by constructing efficient filler networks.

关键词： Coefficient of thermal expansion EMI shielding Nanocomposite Ordered assembly Thermal conductivity

Synchronization of two 3-scroll hyperchaotic attractors using wavelet transform

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Journal of Systems Engineering and Electronics 2006年第2期17卷 387-389页

作者： Li jian Zhou Jiliu Wang yong Zhi yong Coll. of Electronics and Information Sichuan Univ. Chengdu 610064 P.R. China

The synchronization of two 3-scroll hyperchaotie attractors is realized based on wavelet transform and single variables＇ feedstock. In the transmitter, one signal is decomposed by wavelet transform and the detailed information is removed, then the component with low frequency is reconstructed and sent into the channel In the receiver, the received signal is used as the feedback signal to realize the synchronization of two chaotic systems. Using this synchronous method, the transmitting signal is transported in compressible way, the system resource is saved, furthermore, because the transported signal is not a whole chaotic signal, the performance of security of the system is improved.

关键词： wavelet transform 3-scroll hyperehaotie attractor synchronization single variable's feedback.

Sidearm Modified Bisoxazoline Ligands and Their Applicationst

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Chinese Journal of Chemistry 2018年第12期36卷 1123-1129页

作者： Lijia Wang jian Zhou yong Tang The State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of Sciences345 Lingling RoadShanghai 200032China School of Chemistry East China Normal University3663N Zhongshan RoadShanghai 300062China

Developing novel and highly efficient chiral ligands is the eternal theme in chiral catalysis research, since none of ligands or catalysts is universal for all the reactions. We are aiming at searching for a facile and effective strategy in developing new chiral ligands that could be employed in a broad range of asymmetric reactions. By introducing additional (sidearm) groups to a classic chiral ligand, both the electron nature and steric environment of the catalyst could be adjusted, and thus the reactivity, selectivity and functional group tolerance of a catalyst could be modulated. Based on this strategy, a variety of sidearm modified bisoxazoline ligands have been designed and developed, including TOX, SaBOX, diSaBOX and Wing‐BOX. The account presents a brief introduction on their discovery and representative applications.

关键词： chiral ligands enantioselective bisoxazoline asymmetric catalysis sidearm

Magnetohydrodynamic Electroosmotic Flow with Patterned Charged surface and Modulated Wettability in a Parallel Plate Microchannel

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Communications in Theoretical Physics 2019年第10期71卷 1163-1171页

作者： Na Hao yong-Jun jian School of Mathematical Science Inner Mongolia University

This paper investigates the magnetohydrodynamic(MHD) electroosmotic flow(EOF) of Newtonian fluid through a zeta potential modulated parallel plate microchannel with patterned hydrodynamic slippage. The driven mechanism of the flow originates from the Lorentz force generated by the interaction of externally imposed lateral electric field Ey and vertical magnetic field Bz and electric field force produced by an externally applied electric field Ex. It is assumed that the wall zeta potential and the slip length are periodic functions of axial coordinate x, an analytical solution of the stream function is achieved by utilizing the method of separation of variables and perturbation expansion. The pictures of streamlines are plotted and the vortex configurations produced in flow field due to patterned wall potential and hydrodynamic slippage are discussed. Based on the stream function, the velocity field and volume flow rate are obtained, which are greatly depend on some dimensionless parameters, such as slip length ls, electrokinetic widthλ, the amplitude δ of the patterned slip length, the amplitude m of the modulated zeta potential and Hartmann number Ha. The variations of velocity and volume flow rate with these dimensionless parameters are discussed in details. These theoretical results may provide some guidance effectively operating micropump in practical nanofluidic applications.

关键词： magnetohydrodynamic(MHD) flow electroosmotic flow(EOF) modulated hydrodynamic slippage patterned charged surface

Direct high-resolution X-ray imaging exploiting pseudorandomness

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Light(Science & Applications) 2023年第5期12卷 776-788页

作者： KyeoReh Lee Jun Lim su yong Lee yongKeun Park Department of Physics Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea KAIST Institute for Health Science and Technology Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea Pohang Accelerator Laboratory Pohang University of Science and TechnologyPohangKyungbuk 37637Republic of Korea Tomocube Inc Daejeon 34051Republic of Korea

Owing to its unique penetrating power and high-resolution capability,X-ray imaging has been an irreplaceable tool since its *** the significance,the resolution of X-ray imaging has largely been limited by the technical difficulties on X-ray lens *** lensless imaging methods have been proposed,but are yet relying on multiple measurements or additional constraints on measurements or *** we present coherent specklecorrelation imaging(CSI)using a designed X-ray *** has no prerequisites for samples or ***,from a single shot measurement,the complex sample field is retrieved based on the pseudorandomness of the speckle intensity pattern,ensured through a *** achieve a spatial resolution of 13.9 nm at 5.46 keV,beating the feature size of the diffuser used(300 nm).The high-resolution imaging capability is theoretically explained based on fundamental and practical *** expect the CSI to be a versatile tool for navigating the unexplored world of nanometer.

关键词： resolution speckle replace

Growth Mechanism and Characterization of Single-crystalline Ga-doped SnO2 Nanowires and Self-organized SnO2/Ga2O3 Heterogeneous Microcomb Structures

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Chinese Journal of Chemical Physics 2008年第2期21卷 181-186页

作者： yong su Liang Xu Xue-mei Liang Yi-qing Chen School of Materials Science and Engineering Hefei University of Technology Hefei 230009 China Hefei General Machinery Research Institute Hefei 230031 China

Single-crystalline Ga-doped SnO2 nanowires and SnO2：Ga2O3 heterogeneous microcombs were synthesized by a simple one-step thermal evaporation and condensation method. They were characterized by means of X-ray powder diffraction （XRD）, field-emission scanning electron microscopy （FE-SEM）, energy-dispersive X-ray spectroscopy （EDS）, transmission electron microscopy （TEM） and selected-area electron diffraction （SAED）. FE-SEM images showed that the products consisted of nanowires and mierocombs that represent a novel morphology. XRD, SAED and EDS indicated that they were single-crystalline tetragonal SnO2. The influence of experimental conditions on the morphologies of the products is discussed. The morphology of the product showed a ribbon-like stem and nanoribbon array aligned evenly along one or both side of the nanoribbon. It was found that many Ga2O3 nanoparticles deposited on the surface of the microcombs. The major core nanoribbon grew mainly along the [110] direction and the self-organized branching nanoribbons grew epitaxially along [110] or [110] orientation from the （110） plane of the stem. A growth process was proposed for interpreting the growth of these remarkable SnO2：Ga2O3 heterogeneous microcombs. Due to the heavy doping of Ga, the emission peak in photoluminescence spectra has red-shifted as well as broadened significantly.

关键词： Microcomb Nanoribbon Photoluminescence