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An Extended Method for Constructing Travelling Wave Solutions to Nonlinear Partial Differential Equations

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Communications in Theoretical Physics 2005年第3X期44卷 407-414页

作者： jiao xiao-yu WANG Jin-Huan ZHANG Hong-Qing Department of Applied Mathematics Dalian University of Technology Dalian 116024 China

In this paper, an extended method is proposed for constructing new forms of exact travelling wave solutions to nonlinear partial differential equations by making a more general transformation. For illustration, we apply the method to the asymmetric Nizhnik-Novikov-Vesselov equation and the coupled Drinfel＇d-Sokolov-Wilson equation and successfully cover the previously known travelling wave solutions found by Chen＇s method .

关键词： soliton solution asymmetric Nizhnik-Novikov-Vesselov equation coupled Drinfel'd-Sokolov-Wilson equation

Approximate Symmetries and Infinite Series Symmetry Reduction Solutions to Perturbed Kuramoto-Sivashinsky Equation

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Communications in Theoretical Physics 2009年第5期51卷 785-788页

作者： YAO Ruo-Xia jiao xiao-yu LOU Sen-yue Department of Physics Shanghai Jiao Tong University Shanghai 200062 China School of Computer Science Shaanxi Normal University Xi＇an 710062 China Department of Physics Ningbo University Ningbo 315211 China

Starting from Lie symmetry theory and combining with the approximate symmetry method, and using the package LieSYMGRP proposed by us, we restudy the perturbed Kuramoto-Sivashinsky （KS） equation. The approximate symmetry reduction and the infinite series symmetry reduction solutions of the perturbed KS equation are constructed. Specially, if selecting the tanh-type travelling wave solution as initial approximate, we not only obtain the general formula of the physical approximate similarity solutions, but also obtain several new explicit solutions of the given equation, which are first reported here.

关键词： perturbed Kuramoto-Sivashinsky equation approximate symmetry reduction series reduction solution

一类扰动Kadomtsev-Petviashvili方程的雅可比椭圆函数解的收敛性探讨

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物理学报 2019年第14期68卷 239-246页

作者：焦小玉贾曼安红利南京财经大学应用数学学院南京210023 宁波大学物理与技术学院宁波315211 南京农业大学理学院南京210095

为构造一类扰动Kadomtsev-Petviashvili(KP)方程的级数解,利用同伦近似对称法求出三种情形下具有通式形式的相似解以及相应的相似方程.而且,对于第三种情形下的前几个相似方程,雅可比椭圆函数解亦遵循共同的表达式,这可以产生形式紧凑... 详细信息

为构造一类扰动Kadomtsev-Petviashvili(KP)方程的级数解,利用同伦近似对称法求出三种情形下具有通式形式的相似解以及相应的相似方程.而且,对于第三种情形下的前几个相似方程,雅可比椭圆函数解亦遵循共同的表达式,这可以产生形式紧凑的级数解,从而为收敛性的探讨提供便利:首先,对于扰动KP方程的微扰项,给定u关于变量y的导数阶数n,若n≤1(n≥3),则减小(增大)|a/b|致使收敛性改善;其次,减小ε,|θ-1|以及|c|均有助于改进收敛性.在更一般情形下,仅当微扰项的导数阶数为偶数时,扰动KP方程才存在雅可比椭圆函数解。

关键词：同伦近似对称法扰动Kadomtsev-Petviashvili方程级数解收敛性

The Problems and Path Thinking of China's Rural Logistics Development

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Asian Agricultural Research 2011年第5期3卷 112-115页

作者： jiao Rui,yu xiao-qiong School of Economics,Sichuan University,Chengdu 610065,China

This paper introduces seasonal characteristic,scattered characteristic and diversified characteristic of rural logistics in China,developing rural logistics is significant to increasing farmers' income,promoting life quality,reducing cost of agricultural products,increasing job opportunities and quickening the process of *** paper also analyzes the status quo and existing problems of China's rural logistics as ***'s rural logistics,with late start and great logistics aggregate,develops rapidly;the main body of rural logistics has a trend of diversification;the informatization develops *** there are some problems,for example,the infrastructure of rural logistics is backward;the informatization level is low;the development degree of main body of market is low;there is a shortage of talents;the technological level is *** countermeasures are put forward to promote the development of rural logistics in China as follows:strengthen infrastructure construction of rural logistics in China;reinforce the construction of rural informatization;foster the main body of market of rural logistics in China;vigorously foster talents of modern rural logistics;promote technological level of rural logistics.

关键词： Rural logistics Problems Countermeasures China

靶材成分对磁控溅射PTFE超疏水薄膜的影响

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表面技术 2017年第9期46卷 141-146页

作者：任芝龙肖娇玉黄佳木重庆大学材料科学与工程学院重庆400045

目的了解靶材成分对磁控溅射PTFE薄膜性能的影响,以提升PTFE薄膜疏水性能。方法采用射频磁控溅射技术,在玻璃基片上一步制备了透明超疏水聚四氟乙烯薄膜,并研究了不同PTFE靶材对薄膜的影响。利用X射线光电子能谱仪(XPS)、接触角测试仪(D... 详细信息

目的了解靶材成分对磁控溅射PTFE薄膜性能的影响,以提升PTFE薄膜疏水性能。方法采用射频磁控溅射技术,在玻璃基片上一步制备了透明超疏水聚四氟乙烯薄膜,并研究了不同PTFE靶材对薄膜的影响。利用X射线光电子能谱仪(XPS)、接触角测试仪(Drop Meter)、紫外-可见分光光度计(UV-Vis)分别对靶材和薄膜的性能进行研究。结果两靶材的氟碳官能团含量有明显差异,且靶材1含有CF2O,靶材2中不含。靶材的成分影响了PTFE的溅射率,靶材1的溅射率为靶材2的2倍。相同溅射时间下,靶材不同的薄膜厚度不同,从而表现出不同的静态水接触角。薄膜的疏水性能与薄膜厚度呈现指数关系,最终稳定在170°水接触角平台。同时,溅射过程中,F离子刻蚀到玻璃基底而引入了Na F,但薄膜中Na F和氟碳基团的含量与靶材成分相关。薄膜中Na F的存在,提升了薄膜的F/C比,降低了薄膜表面能,提升了其疏水性能,但降低了薄膜的可见光透过率。结论一步制备透明超疏水聚四氟乙烯薄膜的技术具有广泛应用前景,了解靶材成分对薄膜性能的影响具有重要指导意义。

关键词：磁控溅射聚四氟乙烯薄膜靶材透光率超疏水

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江苏民营企业劳资关系问题研究

扬州大学学报（人文社会科学版） 2009年第4期13卷 21-30页

作者：胡学勤焦晓钰扬州大学经济学院江苏扬州225009

江苏民营企业在促进就业、增加劳动者的收入、创造税收、推进自主创新、协调经济发展、促进社会稳定等方面作出了重要贡献。江苏省民营企业劳资关系总的来说是稳定的、协调的,但是在一些地方或一些时期也出现了矛盾凸现、关系紧张的问... 详细信息

江苏民营企业在促进就业、增加劳动者的收入、创造税收、推进自主创新、协调经济发展、促进社会稳定等方面作出了重要贡献。江苏省民营企业劳资关系总的来说是稳定的、协调的,但是在一些地方或一些时期也出现了矛盾凸现、关系紧张的问题。认真分析江苏民营企业劳资关系存在的问题,应着重从制度方面考察民营企业劳资冲突的成因,在此基础上提出协调民营企业劳资关系的制度构想。

关键词：江苏省民营企业劳资关系

High-energy-density lithium manganese iron phosphate for lithium-ion batteries: Progresses, challenges, and prospects

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Journal of Energy Chemistry 2025年第1期100卷 1-17页

作者： Bokun Zhang xiaoyun Wang Shuai Wang Yan Li Libo Chen Handong jiao Zhijing yu Jiguo Tu State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Research Institute for Intelligent Wearable Systems The Hong Kong Polytechnic University Institute of Advanced Structure Technology Beijing Institute of Technology

The soaring demand for smart portable electronics and electric vehicles is propelling the advancements in high-energy–density lithium-ion *** manganese iron phosphate (LiMnxFe1-xPO4) has garnered significant attention as a promising positive electrode material for lithium-ion batteries due to its advantages of low cost,high safety,long cycle life,high voltage,good high-temperature performance,and high energy *** LiMnxFe1-xPO4has made significant breakthroughs in the past few decades,there are still facing great challenges in poor electronic conductivity and Li-ion diffusion,manganese dissolution affecting battery cycling performance,as well as low tap *** review systematically summarizes the reaction mechanisms,various synthesis methods,and electrochemical properties of LiMnxFe1-xPO4to analyze reaction processes accurately and guide material ***,the main challenges currently faced are concluded,and the corresponding various modification strategies are discussed to enhance the reaction kinetics and electrochemical performance of LiMnxFe1-xPO4,including multi-scale particle regulation,heteroatom doping,surface coating,as well as microscopic morphology ***,in view of the current research challenges faced by intrinsic reaction processes,kinetics,and energy storage applications,the promising research directions are *** importantly,it is expected to provide key insights into the development of high-performance and stable LiMnxFe1-xPO4materials,to achieve practical energy storage requirements.

关键词： Lithium manganese iron phosphate High energy density Lithium-ion batteries Reaction mechanism Tap density

工资集体协商制度对企业雇佣量影响的实证研究——来自杭州市企业的证据

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财经论丛 2014年第7期 3-9页

作者：姚先国焦晓钰乐君杰浙江大学公共政策研究院浙江杭州310058 浙江大学公共管理学院浙江杭州310058

本文利用2012年杭州市企业调查数据,实证分析了工资集体协商制度与企业雇佣量之间的关系。研究结果发现,该制度对扩大企业雇佣规模整体上有显著且稳健的正效应,且内生性检验表明企业实施该制度与否不存在统计上显著的自选择。进一步分... 详细信息

本文利用2012年杭州市企业调查数据,实证分析了工资集体协商制度与企业雇佣量之间的关系。研究结果发现,该制度对扩大企业雇佣规模整体上有显著且稳健的正效应,且内生性检验表明企业实施该制度与否不存在统计上显著的自选择。进一步分类别估计显示,这种正效应主要集中在民营企业、制造业企业和低经营收入企业,在其他类别企业则未发现显著影响。

关键词：工资集体协商制度雇佣量企业类别差异化

Dynamic Regulation of Hydrogen Bonding Networks and Solvation Structures for Synergistic Solar‑Thermal Desalination of Seawater and Catalytic Degradation of Organic Pollutants

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Nano-Micro Letters 2025年第2期17卷 548-565页

作者： Ming‑yuan yu Jing Wu Guang Yin Fan‑Zhen jiao Zhong‑Zhen yu Jin Qu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Although solar steam generation strategy is efficient in desalinating seawater,it is still challenging to achieve continuous solar-thermal desalination of seawater and catalytic degradation of organic ***,dynamic regulations of hydrogen bonding networks and solvation structures are realized by designing an asymmetric bilayer membrane consisting of a bacterial cellulose/carbon nanotube/Co_(2)(OH)_(2)CO_(3)nanorod top layer and a bacterial cellulose/Co_(2)(OH)_(2)CO_(3)nanorod(BCH)bottom ***,the hydrogen bonding networks inside the membrane can be tuned by the rich surface–OH groups of the bacterial cellulose and Co_(2)(OH)_(2)CO_(3)as well as the ions and radicals in situ generated during the catalysis ***,both SO_(4)^(2−)and HSO_(5)−can regulate the solvation structure of Na^(+)and be adsorbed more preferentially on the evaporation surface than Cl^(−),thus hindering the de-solvation of the solvated Na^(+)and subsequent nucleation/growth of ***,the heat generated by the solar-thermal energy conversion can accelerate the reaction kinetics and enhance the catalytic degradation *** work provides a flow-bed water purification system with an asymmetric solar-thermal and catalytic membrane for synergistic solar thermal desalination of seawater/brine and catalytic degradation of organic pollutants.

关键词： Solar steam generation Seawater desalination Catalytic degradation Bacterial cellulose Cobalt hydroxycarbonate nanorods