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Long-Range Ordered Nanostructures of Assembling Macromolecules via Rational Design of Kinetic Pathways:A Computational Perspective

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Chinese Journal of Polymer Science 2023年第9期41卷 1318-1328,I0004页

作者： Liang-shun zhang Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China

Designing the kinetic pathways of assembling macromolecules such as block copolymers and DNA strands is crucial not only for an achievement of thermodynamically equilibrium nanostructures over macroscopic areas,but also for a better understanding of formation process of higher-level superstructures where well-tailored assemblies act as mesoscopic building *** analysis and computer simulations provide excellent opportunities to microscopically reveal the kinetics and mechanism of structural evolution as well as the collective behaviors of building *** this perspective,we summarize our efforts of theoretical and computational modelling to understand the long-range ordering mechanisms and the organization kinetics of assembling macromolecules along designable ***,we present the computational modelling and recent strategies of designable pathways for the achievement of long-range ***,from the computational views,we give the applications of pathway-designed strategies to explore the ordering mechanism and kinetics in the course of structural evolution,covering the block copolymers and their nanocomposites under zone annealing as well as the hierarchical self-assembly of mesoscopic building units(e.g.,patchy micelles and DNA-functionalized nanoparticles).Finally,we outlook future directions in the field of designable pathways for the achievement of long-range ordered *** perspective could promote further efforts towards the wide applications of theoretical and computational modelling in the construction of soft hybrid metamaterials.

关键词： Dynamic self-consistent field theory Structural evolution Block copolymers Hierarchical self-assembly Polymerization

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Variable Separation and Exact Separable Solutions for Equations of Type uxt=A（u,ux）uxx＋B（u,ux）

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Communications in Theoretical Physics 2006年第6期45卷 969-978页

作者： zhang shun-Li Center for Nonlinear Studies Department of Mathematics Northwest University Xi＇an 710069 China Institute of Modern Physics Northwest University Xi＇an 710069 China Center of Nonlinear Science Ningbo University Ningbo 315211 China

The generalized conditional symmetry is developed to study the variable separation for equations of type uxt = A（u,ux）uxx ＋ B（u, ux）. Complete classification of those equations which admit derivative-dependent fu... 详细信息

关键词： nonlinear evolution equations variable separation generalized conditional symmetry

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Functional Variable Separation for Extended Nonlinear Elliptic Equations

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Communications in Theoretical Physics 2007年第3X期48卷 385-390页

作者： zhang shun-Li Center for Nonlinear Studies Department of Mathematics Northwest University Xi'an 710069 China Center of Nonlinear Science Ningbo University Ningbo 315211 China Department of Physics Shanghai Jiao Tong University Shanghai 200030 China

This paper is devoted to the study of functional variable separation for extended nonlinear elliptic equations. By applying the functional variable separation approach to extended nonlinear elliptic equations via the generalized conditional symmetry, we obtain complete classification of those equations which admit functional separable solutions （FSSs） and construct some exact FSSs to the resulting equations.

关键词： nonlinear elliptic equation functional variable separation generalized conditional symmetry

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Inferring the Physics of Structural Evolution of Multicomponent Polymers via Machine-Learning-Accelerated Method

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Chinese Journal of Polymer Science 2023年第9期41卷 1377-1385,I0006页

作者： Kai-Hua zhang Ying Jiang Liang-shun zhang School of Chemistry Center of Soft Matter Physics and Its ApplicationsBeihang UniversityBeijing100191China Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China

Dynamic self-consistent field theory(DSCFT)is a fruitful approach for modeling the structural evolution and collective kinetics for a wide variety of multicomponent ***,solving a set of DSCFT equations remains daunting because of high computational ***,a machine learning method,integrating low-dimensional representations of microstructures and long short-term memory neural networks,is used to accelerate the predictions of structural evolution of multicomponent *** is definitively demonstrated that the neural-network-trained surrogate model has the capability to accurately forecast the structural evolution of homopolymer blends as well as diblock copolymers,without the requirement of“on-the-fly”solution of DSCFT ***,the data-driven method can also infer the latent growth laws of phase-separated microstructures of multicomponent polymers through simply using a few of time sequences from their past,without the prior knowledge of the governing *** study exemplifies how the machine-learning-accelerated method can be applied to understand and discover the physics of structural evolution in the complex polymer systems.

关键词： Machine learning Dynamic self-consistent field theory Structural evolution Block copolymers Homopolymer blends

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A Bit Level Encryption Scheme Based on Hyper-chaotic System Combing with the Ideology of Central Dogma

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Chinese Journal of Electronics 2018年第3期27卷 595-602页

作者： zhang shun YANG Liang zhang Yuan GAO Tiegang College of software Nankai University

An image encryption scheme based on confusion and diffusion is proposed. In the proposed scheme,original images are transformed into other forms, such as binary streams and ‘hyper-image', firstly. Then the confusion process is achieved by permutation on the pixel level,the binary bit level, and the ‘hyper-image' level respectively. Moreover, the diffusion process is operated on the‘hyper-image' level by bitwise e Xclusive or(XOR) calculation with random sequence generated by a hyper-chaotic system. Furthermore, the central dogma in molecular biology is utilized in the construction of hyper-image, which demonstrates its superiority. Both the theoretical analysis and the experimental results have demonstrated the efficiency and validity of the proposed scheme, and images can be encrypted sufficiently through the three-time permutation and the chaotic substitution.

关键词： Image encryption Bit-level encryption Central dogma Hyper-chaos

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Variable Separation and Exact Solutions to Generalized Nonlinear Diffusion Equations

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Chinese Physics Letters 2002年第12期19卷 1741-1744页

作者： zhang shun-Li, Lou Sen-Yue Department of Mathematics Northwest University Xi'an 710069

We study in detail a method to find the generalized nonlinear diffusion equations, which can be solved by means of the variable separation approach. A complete list of canonical forms for such equations, which admit t... 详细信息

关键词： Nonlinear equations

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Variable Separation for(1+1)-Dimensional Nonlinear Evolution Equations with Mixed Partial Derivatives

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Communications in Theoretical Physics 2008年第10期50卷 797-802页

作者： WANG Peng-Zhou zhang shun-Li Center for Nonlinear Studies Department of Mathematics Northwest University Xi＇an 710069 China Center of Nonlinear Science Ningbo University Ningbo 315211 China

We present basic theory of variable separation for (1 + 1)-dimensional nonlinear evolution equations withmixed partial *** an application,we classify equations u_(xt)=A(u,u_x)u_(xxx)+B(u,u_x) that admits derivative-de... 详细信息

关键词： (1 + 1)-dimensional nonlinear evolution equations variable separation generalized conditional symmetry derivative-dependent functional separable solution

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Classification and Approximate Solutions to Perturbed Nonlinear Diffusion-Convection Equations

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Communications in Theoretical Physics 2008年第1期49卷 17-21页

作者： WANG Yong zhang shun-Li Center for Nonlinear Studies Department of Mathematics Northwest University Xi＇an 710069 China Center of Nonlinear Science Ningbo University Ningbo 315211 China

This paper studies the perturbed nonlinear diffusion-convection equation with source term via the approximate generalized conditional symmetry （A GCS）. Complete classification of those perturbed equations which admit certain types of AGCSs is derived. Some approximate invariant solutions to the resulting equations can also be obtained.

关键词： perturbed nonlinear diffusion-convection equation approximate generalized conditional symme-try approximate invariant solution

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ML and MAP Channel Estimation for Distributed OneWay Relay Networks with Orthogonal Training

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China Communications 2015年第12期12卷 84-91页

作者： YAO Chenhong zhang shun PEI Changxing State Key Laboratory of Integrated Services Networks Xidian University Xian University of Architecture and Technology

In this letter,we investigate the individual channel estimation for the classical distributed-space-time-coding(DSTC) based one-way relay network(OWRN) under the superimposed training *** resorting to the composite channel estimation,as did in traditional work,we directly estimate the individual channels from the maximum likelihood(ML) and the maximum a posteriori(MAP) *** derive the closed-form ML estimators with the orthogonal training *** to the complicated structure of the MAP in-channel estimator,we design an iterative gradient descent estimation process to find the optimal *** results are provided to corroborate our studies.

关键词： posteriori iterative estimator likelihood relay descent variance assumed iteration posed

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Discovery of “Enveloping Surface of Oil and Gas Overpressure Migration” in the Songliao Basin and its bearings on hydrocarbon migration and accumulation mechanisms

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Science China Earth Sciences 2012年第12期55卷 2005-2017页

作者： FENG ZhiQiang zhang shun FENG ZiHui Daqing Oil Field Corporation Ltd.of China Petroleum Daqing 163712China

The Fuyang oil layer of the Songliao Basin is a tight and low-permeability sandstone pay zone formed in the fluvial-shallow water delta *** the formation are mainly lithologic reservoir and tight *** lacustrine-mudstone of K2qn1 is a good source rock and also acts as a good regional cap *** Fuyang oil layer is a typical upper-source and lower-reservoir pattern distributed in a large *** on a large number of exploration and development data, a macroscopic enveloping surface is found developed in the Fuyang oil layer, which is below *** effective reservoirs within the enveloping surface are commonly saturated with oil, and below the enveloping surface are mainly water *** distance from the enveloping surface to the bottom of the source rock is usually 100-350 m and at most 550 *** the research of the distribution patterns and the physical properties of the sandbodies above or beneath the source rock, it is concluded that: 1) the enveloping surface is the boundary of the overpressure hydrocarbon migration; 2) the spacial distribution of the pressure release beds controls the direction and the distance of the overpressure hydrocarbon migration; 3) tight oil reservoirs and lenticular oil reservoirs are mainly formed inside the envelope surface, whereas, conventional reservoirs are formed outside the envelope surface as a result of the buoyancy hydrocarbon *** discovery of the "overpressure hydrocarbon migration enveloping surface" and the concepts of overpressure hydrocarbon migration and buoyancy hydrocarbon migration not only challenge the old notion that "hydrocarbon migrates along the faults and is distributed along fault belts" in the Fuyang oil layer of the Songliao Basin, give a new explanation to the long-distance-oil-downwards migration (hundreds of meters) and expand the exploration potential of the Fuyang oil layer, and provide a rational guidance to the exploration of syncline plays, but also bette

关键词： enveloping surface overpressure migration buoyancy migration pressure release bed tight oil and gas Songliao Basin

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