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Novel Wronskian Solutions to Boussinesq Equation

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Communications in Theoretical Physics 2007年第4X期48卷 577-583页

作者： yao yu-qin LIU yu-qing JI Jie chen deng-yuan Department of Mathematics Shanghai University Shanghai 200444 China

The new method for constructing the Wronskian entries is applied to the Boussinesq equation. The novel Wronskian solutions to it are obtained, including solitons, rational solutions, Matveev solutions, and complexitons.

关键词： Boussinesq equation Wronskiail technique rational solutions Matveev solutions complexitons

Generalized Wronskian Solutions to Differential-Difference KP Equation

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Communications in Theoretical Physics 2007年第5期47卷 769-772页

作者： JI Jie yao yu-qin LIU yu-qing chen deng-yuan Department of Mathematics Shanghai University Shanghai 200444 China Department of Information Science Jiangsu Polytechnic University Changzhou 213016 China

A new method for constructing the Wronskian entries is proposed and applied to the differential-difference Kadomtsev-Petviashvilli （DΔKP） equation. The generalized Wronskian solutions to it are obtained, including ... 详细信息

关键词： Wronskian technique DΔKP equation rational solutions Matveev solutions

The Second mKdV Equation and Its Hereditary Symmetry and Hamiltonian Structure

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Communications in Theoretical Physics 2007年第1期47卷 22-24页

作者： yao yu-qin LIU yu-qing JI Jie chen deng-yuan Department of Mathematics Shanghai University Shanghai 200444 China

The isospectral problem of the second mKdV equation is found out firstly. It follows that the strong hereditary symmetry and the Hamiltonian structure of the second mKdV equation are presented.

关键词： the second mKdV equation hereditary symmetry Hamiltonian structure

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轮胎磨损颗粒对生物滞留系统除氮性能的影响

中国农村水利水电 2025年第2期 1-6页

作者：袁莹李运晴肖文宇程麒铭汪琴宜陈垚重庆交通大学河海学院重庆400074 重庆交通大学环境水利工程重庆市工程实验室重庆400074

机动车行驶过程中产生的轮胎磨损颗粒(TWPs)易随着道路雨水径流进入生物滞留系统(BRS)并发生持续积累,对系统除氮功能产生潜在威胁。为此,考察了TWPs不同胁迫时间下BRS除氮性能的变化规律,并结合TWPs对土壤理化性质和微生物代谢活性的影... 详细信息

机动车行驶过程中产生的轮胎磨损颗粒(TWPs)易随着道路雨水径流进入生物滞留系统(BRS)并发生持续积累,对系统除氮功能产生潜在威胁。为此,考察了TWPs不同胁迫时间下BRS除氮性能的变化规律,并结合TWPs对土壤理化性质和微生物代谢活性的影响,识别了TWPs胁迫对除氮性能的主要驱动因素。结果表明,TWPs短期(0~30 d)胁迫对BRS除污性能无显著影响,但长期(31~101 d)胁迫可减弱BRS对NH_(4)^(+)-N和TN的去除能力,去除率分别降低16.90%和6.89%(P<0.001),并显著抑制种植层硝化速率(NR)(P<0.05)。但其可增强底物诱导呼吸速率(SIR)和脱氢酶活性(DHA)(P<0.01)。同时,TWPs长期胁迫可显著提高种植层土壤有机质(SOM)和TN含量,并显著降低土壤NH_(4)^(+)-N含量(P<0.01),但其并未对淹没层土壤特性产生影响。此外,偏最小二乘路径模型分析表明,种植层土壤健康化学指标(SOM和TN)与生物学指标(DHA和SIR)间存在强显著正相关的路径效应(0.001

关键词：生物滞留微塑料除氮土壤理化性质微生物代谢活性

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A covering liquid method to intensify self-preservation effect for safety of methane hydrate storage and transportation

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Petroleum Science 2022年第3期19卷 1411-1419页

作者： Jun chen yao-Song Zeng Xing-yu yu qing yuan Tao Wang Bin deng Ke-Le Yan Jian-Hong Jiang Li-Ming Tao Chang-Zhong chen Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds and Applications College of Chemistry and Environmental ScienceXiangnan UniversityChenzhouHunan Province423000China School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng252059China SINOPEC Research Institute of Safety Engineering 339 Songling RoadQingdao266000China

In this work,experiments and comprehensive insights into the proposed covering liquid method to intensify self-preservation effect for methane(CH_(4))storage are *** CH_(4)hydrate decomposition percentage was 17.6%with the pressure of 0.61 MPa after 12 h at 266.0 K without a covering liquid,which can be reduced to 12.4%,13.8%,13.0%,and 8.3%with the pressure of 0.26 MPa,0.33 MPa,0.51 MPa,and 0.37 MPa by covering with tetrahydrofuran(THF),cyclopentane(CP),cyclohexane,and n-tetradecane,*** the temperature for CH_(4)hydrate decompositionwas 274.2 K,covering with THF,CP,cyclohexane,and n-tetradecane failed to inhibit CH_(4)hydrate *** results suggested that the covering liquid may form a new solid layer(a hydrate layer or other solidified layer)around the CH_(4)hydrate,which inhibit CH_(4)transfer below the freezing point of ***,the new solid layer cannot resist the fast transfer of CH_(4)from decomposed CH_(4)hydrate above the freezing point of *** same phenomenon was also observed in a sodium dodecyl sulfonate(SDS)-dry solution CH_(4)hydrate formation ***,the covering method can only intensify the self-preservation effect below the freezing point of water,but cannot generate a self-preservation effect.

关键词： Decomposition Inhibition Methane hydrate Method Self-preservation effect

High-temperature polymer-based nanocomposites for high energy storage performance with robust cycling stability

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Rare Metals 2023年第11期42卷 3682-3691页

作者： Yi-Fan chen Yan-Tao Zheng Feng-yuan Zhang Zhi-Gang Liu Ling-yu Zhang Lu Yang Xin-Di Sun yuan deng yao Wang School of Materials Science and Engineering Beihang UniversityBeijing100191China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen518055China Hangzhou Innovation Institute Beihang UniversityHangzhou310052China

High-power capacitors are highly demanded in advanced electronics and power systems,where rising concerns on the operating temperatures have evoked the attention on developing highly reliable high-temperature dielectric ***,polyetherimide(PEI)filled with highly insulating Al_(2)O_(3)(AO)nanoparticles dielectric composite films have been fabricated aiming for high thermal stability and reliability operated under high cycling electric field and elevated *** room temperature,incorporating a small fraction of 0.5 vol%AO nanoparticles gives rise to a highest discharged energy density(U_(e))of 5.57 J·cm^(-3)and efficiency(η)of 90.9%at650 MV·m^(-1),and a robust cycling stability up to 10^(7) cycles at 400 MV·m^(-1).Due to the substantially reduced dielectric loss,2.0 vol%AO/PEI nanocomposite film exhibits excellent high-temperature capacitive performances,delivering U_(e)~7.33 J·cm^(-3)withη~88.8%under 700 MV·m^(-1),and cycling stability up to 10^(6) cycles under 400 MV·m^(-1)at 100℃,and U_(e)~5.57 J·cm^(-3)withη~84.7%under 620 MV·m^(-1)at 150℃.Molecular dynamic simulations are performed to understand the microscopic mechanism via revealing the polymer relaxation process in the AO/PEI composite at elevated *** results are therefore very encouraging for high-temperature high-power capacitor application.

关键词： Polymer-based nanocomposites Dielectric Energy storage Temperature stability

Diatomite-incorporated hierarchical scaffolds for osteochondral regeneration

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Bioactive Materials 2024年第8期38卷 305-320页

作者： Cuijun deng chen qin Zhenguang Li Laiya Lu Yifan Tong Jiaqi yuan Feng Yin yu cheng chengtie Wu Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation Clinical Research Center for Anesthesiology and Perioperative MedicineTranslational Research Institute of Brain and Brain-Like IntelligenceShanghai Fourth People’s HospitalSchool of MedicineTongji UniversityShanghai200434PR China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050PR China Department of Joint Surgery Shanghai East HospitalSchool of MedicineTongji University150 Jimo RoadShanghai200032PR China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai200438PR China

Osteochondral regeneration involves the highly challenging and complex reconstruction of cartilage and subchondral ***(Si)ions play a crucial role in bone *** research on Si ions mainly focuses on bone repair,by using silicate bioceramics with complex ion ***,it is unclear whether the Si ions have important effect on cartilage *** a scaffold that solely releases Si ions to simultaneously promote subchondral bone repair and stimulate cartilage regeneration is critically ***(DE)is a natural diatomaceous sediment that can stably release Si ions,known for its abundant availability,low cost,and environmental ***,a hierarchical osteochondral repair scaffold is uniquely designed by incorporating gradient DE into GelMA *** adding DE microparticles provides a specific Si source for controlled Si ions release,which not only promotes osteogenic differentiation of rBMSCs(rabbit bone marrow mesenchymal stem cells)but also enhances proliferation and maturation of ***,DE-incorporated hierarchical scaffolds significantly promoted the regeneration of cartilage and subchondral *** study suggests the significant role of Si ions in promoting cartilage regeneration and solidifies their foundational role in enhancing bone ***,it offers an economic and eco-friendly strategy for developing high value-added osteochondral regenerative bioscaffolds from low-value ocean natural materials.

关键词： Diatomite Si release Hierarchical scaffolds 3D printing Osteochondral regeneration

A 2-D Copper Coordination Polymer[Cu(4,4'-bpy)(H_(2)O)_(4)](C_(4)H_(2)O_(4))(H_(2)O)_(4)Integrated by Hydrogen Bonds and VDW Interactions

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Chinese Journal of Structural Chemistry 2004年第8期23卷 862-864页

作者： KANG yao LI Zhao-Ji qin Ye-Yan chen yu-Biao ZHANG Jian HU Rui-Feng WEN Yi-Hang chenG Jian-Kai yao yuan-Gen State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterThe Chinese Academy of SciencesFuzhouFujian 350002China

The title compound, [Cu(4,4-bpy)(H2O)4](C4H2O4)(H2O)4 1, has been syn- thesized by the reaction of Cu(NO3)23H2O with 4,4-bipyridine and fumaric acid, and structurally characterized by X-ray diffraction analysis. Its crystal structure belongs to monoclinic, space group C2/c with a = 16.6350(5), b = 11.1667(2), c = 13.1371(4) ? = 125.144(1), C14H26CuN2O12, Mr = 477.91, Z = 4, V = 1995.47(9) 3, Dx = 1.591 g/cm3, m = 1.160 mm-1, F(000) = 996, R = 0.0331 and wR = 0.0883 for 1765 observed reflections (I > 2(I)). A two-dimensional network is formed in complex 1 through the hydrogen bonds and VDW interactions.

关键词： copper 4,4'-bipyridine fumaric acid a chain coordination polymer

Femtosecond Time-Resolved Resonance-Enhanced CARS of Gaseous Iodine at Room Temperature

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Chinese Physics Letters 2011年第4期28卷 216-219页

作者： HE Ping FAN Rong-Wei XIA yuan-qin yu Xin yao Yong chen De-Ying National Key Laboratory of Science and Technology on Tunable Laser Institute of Opto-electronicsHarbin Insitute of TechnologyHarbin 150080 College of Basic Sciences Harbin University of CommerceHarbin 150028 Department of Electronic and Information Engineering Shenzhen Graduate SchoolHarbin Institute of TechnologyShenzhen 518055

Time-resolved resonance-enhanced coherent anti-Stokes Raman scattering(CARS)is applied to investigate molecular dynamics in gaseous iodine.40fs laser pulses are applied to create and monitor the high vibrational states of iodine at room temperature(corresponding to a vapor pressure as low as about 35 Pa)by femtosecond timeresolved *** on the time delay between the probe pulse and the pump/Stokes pulse pairs,the high vibrational states both on the electronically ground states and the excited states can be detected as oscillations in the CARS transient *** is proved that the femtosecond time-resolved CARS technique is a promising candidate for investigating the molecular dynamics of a low concentration system and can be applied to environmental and atmospheric monitoring measurements.

关键词： pump Femto scattering