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Preface： theory, methods, and applications of mesoscopic modeling

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Applied Mathematics and Mechanics(english edition) 2018年第1期39卷 1-2页

作者： z. LI Guohui HU G.e. KARNIADAKIS Division of Applied Mathematics Brown UniversityProvidenceRhode Island 02912U.S.A. Shanghai Institute of Applied Mathematics and Mechanics Shanghai UniversityShanghai 200072China

With increasing attention to complex fluids and soft matter, we have witnessed a fast- growing research in mesoscopic modeling and simulation in the past decades. The development of mesoscopic methods offers many potential opportunities as well as challenges in modeling of complex materials for diverse applications. Despite significant progress in the past decade, mesoscopic methods are still under development. New formulation in the models, novel theo- retical interpretations, and innovative numerical algorithms often appear in literature. These mesoscopic methods have been already applied to a large number of problems, including poly- mer and colloidal suspensions, multiphase fluids, biological materials, and blood rheology. New applications of mesoscopic modeling in different areas are still emerging.

关键词： theory methods mesoscopic modeling

On a general theory for compressing process and aeroacoustics:linear analysis

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Acta Mechanica Sinica 2010年第3期26卷 355-364页

作者： e .Mao Y. P. Shi J. z. Wu State Key Laboratory for Turbulence and Complex Systems College of Engineering Peking University 100871 Beijing China University of Tennessee Space Institute Tullahoma TN 37388 USA

Of the three mutually coupled fundamental processes （shearing, compressing, and thermal） in a general fluid motion, only the general formulation for the compress- ing process and a subprocess of it, the subject of aeroacous- tics, as well as their physical coupling with shearing and thermal processes, have so far not reached a consensus. This situation has caused difficulties for various in-depth complex multiprocess flow diagnosis, optimal configuration design, and flow/noise control. As the first step toward the desired formulation in fully nonlinear regime, this paper employs the operator factoriz.tion method to revisit the analytic linear theories of the fundamental processes and their decomposi- tion, especially the further splitting of compressing process into acoustic and entropy modes, developed in 1940s-1980s. The flow treated here is small disturbances of a compressible, viscous, and heat-conducting polytropic gas in an unbounded domain with arbitrary source of mass, external body force, and heat addition. Previous results are thereby revised and extended to a complete and unified theory. The theory pro- vides a necessary basis and valuable guidance for developing corresponding nonlinear theory by clarifying certain basic issues, such as the proper choice of characteristic variables of compressing process and the feature of their governing equations.

关键词： Longitudinal (compressing) processTransversal (shearing) process Acoustic mode entropy mode Aeroacoustics

Multiplicity characteristics in relativistic ^(24)Mg-nucleus collisions

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Chinese Physics C 2013年第8期37卷 12-20页

作者： A. Abdelsalam e. A. Shaat z. Abou-Moussa B. M. Badawy z. S. Mater Physics Department Faculty of Science Cairo University Reactor Physics Department Nuclear Research Center Atomic Energy Authority Egypt

This work is concerned with the analyses of the shower and gray particle production in 4.5 A GeV/c 24Mg collision with emulsion nuclei. The highest particle production occurs in the region of the low impact parameters. While the multiplicity of the shower particles emitted in the forward direction depends on the projectile mass number and energy, the multiplicity of the backward ones shows a limiting behaviour. The source of the emission of the forward shower particles is completely different from that of the backward ones. The target fragments are produced in a thermaliz.d system of emission.

关键词： 24Mg interactions with emulsion forward and backward emission of hadrons projectile and target dependence

Influence of Chemical effect on the Kβ/Kα Intensity Ratios and Kβ energy Shift of Co, Ni, Cu, and z. Complexes

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Chinese Journal of Chemical Physics 2008年第6期21卷 591-595页

作者： G. Apaydin V. Aylikci z. Biyiklioglu e. Tirasoglu H. Kantekin Department of Physics Faculty of Arts and Sciences Karadeniz Technical University Trabzon 61080 Turkey Department of Chemistry Faculty of Arts and Sciences Karacleniz Technical University Trabzon 61080 Turkey

Chemical effects on the Kβ/Kα intensity ratios and △e energy differences for Co, Ni, Cu, and z. complexes were investigated. The samples were excited by 59.5 keV γ-rays from a ^241Am annular radioactive source. K X-rays emitted by samples were counted by an Ultra-LeGe detector with a resolution of 150 eV at 5.9 keV. We observed the effects of different ligands on the Kβ/Kα intensity ratios and △e energy differences for Co, Ni, Cu, and z. complexes. We tried to investigate chemical effects on central atoms using the behaviors of different ligands in these complexes. The experimental values of Kβ/Kα were compared with the theoretical and other experimental values of pure Co, Ni, Cu, and z..

关键词： Chemical effect K intensity ratio △e energy difference Ultra-LeGe detector 241Am annular radioactive source

A method for analyz.ng on-line video images of crystalliz.tion at high-solid concentrations

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Particuology 2008年第1期6卷 9-15页

作者： Jian Wan Cai Y. Ma Xue z. Wang Institute of Particle Science and engineering School of Process Environmental and Materials Engineering University of Leeds Leeds LS2 9JT UK

Recent research has demonstrated that on-line video imaging is a very promising technique for monitoring crystalliz.tion processes. The bottleneck in applying the technique for real-time closed-loop control is considered as image analysis that needs to be robust, fast and able to handle varied image qualities due to temporal variations of operating conditions such as mixing and solid concentrations. Image analysis at highsolid concentrations turns out to be extremely challenging because crystals tend to overlap or attach to each other and the boundaries between the crystals are usually ambiguous. This paper presents an image segmentation algorithm that can effectively deal with images taken at high-solid concentrations. The method segments crystals attached to each other along the mostly related concave points on the contours of crystal blocks. The detailed procedure is introduced with application to crystalliz.tion of L-glutamic acid in a hot-stage reactor.

关键词： Crystalliz.tion High-solid concentrations Image processing Multi-scale segmentation Watershed segmentation Crystal siz. distribution

Watermarking of Digital Images in Frequency Domain

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International Journal of Automation and computing 2010年第1期7卷 17-22页

作者： Sami e. I. Baba Lala z. Krikor Thawar Arif z.ad Shaaban Faculty of Information Technology Applied Science UniversityAmmanJordan

Invisible watermarking methods have been applied in frequency domains, trying to embed a small image inside a large original image. The original bitmap image will be converted into frequency domain to obtain the discrete cosine transform （DCT） matrices from its blocks. The bits of the logo image are embedded in random color components of the original image, as well as in random positions in each selected block. These positions are alternating current （AC） coefficients of the DCT matrix. The randomness is obtained from RC4 pseudorandom bit generator that determines in which color component this logo image bits will be embedded. The embedded bits have been hidden in random blocks in the image, which are chosen according to a （semi-random） function proposed in this work.

关键词： Watermarking discrete cosine transform (DCT) pseudorandom bit generator RC4 JPeG

exact solutions of the Duffin-Kemmer-Petiau equation with a hyperbolical potential in (1+3) dimensions

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Chinese Physics C 2013年第7期37卷 23-26页

作者： H. Hassanabadi z. Molaee A. Boumali Department of Basic Sciences Shahrood Branch Islamic Azad University Department of Basic sciences. Garmsar Branch Islamic Azad university Laboratoire de Physique Appliquée et Théorique LPAT Université de Tébessa

We study S-wave solutions of the Duffin-Kemmer-Petiau （DKP） equation in the presence of a hyperbolical potential in （1＋3）-dimensional space-time for spin-one particles. The exact analytical Nikiforov-Uvarov （NU） method is used in the calculations to obtain the eigenfunctions and the corresponding eigenvalues. Some figures and numerical values are included to give a better insight to the solutions.

关键词： Duffin-Kemmer-Petiau equation hyperbolical potential Nikiforov-Uvarov technique

A novel process for sorting fine-siz.d sulphide minerals by biocoagulation

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中国有色金属学会会刊：英文版 2008年第6期18卷 1473-1479页

作者： H. z. KUYUMCU J. PINKA T. BIeLIG Department of Mechanical Process engineering and Solids Processing Technical University of Berlin Sekr. BH 11 Strasse des 17. Juni 135 10623 Berlin Germany

基于一个过程设计想法，在柏林的技术大学的调查证实微生物的 biocoagulation 和稳固的粒子将是一个新方法产生对排序合适的更粗糙的粒子。微生物的选择 biocoagulation 的过程，分别地例如酵母喜欢 Saccharomyces cerevisiae 和 Yarrow... 详细信息

基于一个过程设计想法，在柏林的技术大学的调查证实微生物的 biocoagulation 和稳固的粒子将是一个新方法产生对排序合适的更粗糙的粒子。微生物的选择 biocoagulation 的过程，分别地例如酵母喜欢 Saccharomyces cerevisiae 和 Yarrowia lipolytica，并且例如象方铅矿和闪锌矿一样的矿物质，微分散固体作为一个新奇排序过程的一个基础被分析了。因此，特别微生物的房间表面的特征例如静电的费用和细胞外的聚合物质的作文，以及他们对选择 biocoagulation 的影响被学习。在 10 m 下面的微生物和硫醚粒子有效地凝结的试验性的调查表演。而且，筹款对有选择地形成的 biocoagulates 的分离合适。与设计的列筹款，令人满意的恢复率被到达。

关键词：硫矿拣选生物凝固微生物

Numerical Study on Breaking Criteria for Solitary Waves

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China Ocean engineering 2003年第4期18卷 589-604页

作者： Chung-ren CHOU Ruey-syan SHIH John z. YIM Department of Harbor and River engineering Taiwan Ocean University Keelung ChinaDepartment of Civil Engineering Tung Nan Institute of Technology Taipei ChinaDepartment of Harbor and River Engineering Taiwan Ocean University Keelung China

Studies of the breaking criteria for solitary waves on a slope are presented in this paper. The boundary element method is used to model the processes of shoaling and breaking of solitary waves on various slopes. empirical formulae that can be used to characteriz. the breaking of solitary waves are presented. These include the breaking index, the wave height, the water depth, and the maximum particle velocity at the point of breaking. Comparisons with the results of other researches are given.

关键词： boundary element breaking indices empirical formula solitary wave