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| 1 | Large eddy simulation of hydrogen/air scramjet combustion using tabulated thermo-chemistry approach显示文摘Large eddy simulations(LES) have been performed to investigate the flow and combustion fields in the scramjet of the German Aerospace Center(DLR). Turbulent combustion is modeled by the tabulated thermo-chemistry approach in combination with the presumed probability density function(PDF). A b-function is used to model the distribution of the mixture fraction, while two different PDFs, d-function(Model I) and b-function(Model II), are applied to model the reaction progress. Temperature is obtained by solving filtered energy transport equation and the reaction rate of the progress variable is rescaled by pressure to consider the effects of compressibility. The adaptive mesh refinement(AMR) technique is used to properly capture shock waves,boundary layers, shear layers and flame structures. Statistical results of temperature and velocity predicted by Model II show better accuracy than that predicted by Model I. The results of scatter points and mixture fraction-conditional variables indicate the significant differences between Model I and Model II. It is concluded that second moment information in the presumed PDF of the reaction progress is very important in the simulation of supersonic combustion. It is also found that an unstable flame with extinction and ignition develops in the shear layers of bluff body and a fuelrich partially premixed flame stabilizes in the central recirculation bubble. | Cao Changmin Ye Taohong Zhao Majie | 2015 | Chinese Journal of Aeronautics2015，28，5： | 5 |
| 2 | In-Situ Hydrothermal Synthesis of Bi–Bi2O2CO3 Heterojunction Photocatalyst with Enhanced Visible Light Photocatalytic Activity显示文摘Bismuth containing nanomaterials recently received increasing attention with respect to environmental applications because of their low cost, high stability and nontoxicity. In this work, Bi–Bi_2O_2CO_3 heterojunctions were fabricated by in-situ decoration of Bi nanoparticles on Bi_2O_2CO_3 nanosheets via a simple hydrothermal synthesis approach. X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM) and high-resolution TEM(HRTEM) were used to confirm the morphology of the nanosheet-like heterostructure of the Bi–Bi_2O_2CO_3 composite. Detailed ultrafast electronic spectroscopy reveals that the in-situ decoration of Bi nanoparticles on Bi_2O_2CO_3 nanosheets exhibit a dramatically enhanced electron-hole pair separation rate, which results in an extraordinarily high photocatalytic activity for the degradation of a model organic dye, methylene blue(MB) under visible light illumination. Cycling experiments revealed a good photochemical stability of the Bi–Bi_2O_2CO_3 heterojunction under repeated irradiation. Photocurrent measurements further indicated that the heterojunction incredibly enhanced the charge generation and suppressed the charge recombination of photogenerated electron-hole pairs. | Prasenjit Kar Tuhin Kumar Maji Ramesh Nandi Peter Lemmens Samir Kumar Pal | 2017 | Nano-Micro Letters2017，9，2： | 3 |
| 3 | RFCM: A hybrid clustering algo- rithm using rough and fuzzy sets显示文摘 | Maji P Pal S K | 2007 | Fundamenta In- formaticae2007，80，4： | 1 |
| 4 | A Fuzzy Soft Set Theoretic Approach to Decision Making Problem 显示文摘 | Maji P K Roy A R | 2007 | Journal of Computational and Applied Mathematics2007，203，41： | 1 |
| 5 | Effect of coupling agent and nanoclay on properties of HDPE,LDPE,PP,PVC blend and Phargamites karka nanocomposite显示文摘 | Biplab K Deka T K Maji | 2010 | Comp Sci Technol2010，70，： | 1 |
| 6 | Intuitionistic fuzzy soft sets显示文摘 | Maji P K Biswas R Roy A R | 2001 | The Journal of Fuzzy Mathematics2001，9，： | 1 |
| 7 | Soft set theory显示文摘 | Maji P K Biswas R Roy A R | | 0，，4： | 1 |
| 8 | Fuzzy soft sets显示文摘 | Maji P K Biswas R Roy A R | 2001 | Fuzzy Math2001，，9： | 1 |
| 9 | Soft Set Theory显示文摘 | Maji P k Roy A R Biswas R | 2003 | Computer and Mathematics Application2003，45，45： | 1 |
| 10 | P K A Fuzzy Soft Set Theoretic Approach to Deci- sion Making Problems 显示文摘 | Roy A R Maji | 2007 | Journal of Computational and Applied Mathematics2007，，203： | 1 |
| 11 | A fuzzy soft set theoretic approach to decision making problems显示文摘 | A.R. Roy P.K. Maji | 2006 | Journal of Computational and Applied Mathematics2006，，： | 1 |
| 12 | A Flexible Interpenetrating Coordination Framework with a Bimodal Porous Functionality显示文摘 | MAJI T K MATSUDA R KITAGAWA S | 2007 | Nature Materials2007，6，： | 1 |
| 13 | Fracture analysis of FRP reinforced concrete beams 显示文摘 | Arup Maji Analilia Orozco Robert Acree | 2001 | Journal of Engineering Mechanics2001，，6： | 1 |
| 14 | Fuzzy soft sets显示文摘 | Maji P K Biswas R Roy A R | | 0，，03： | 1 |
| 15 | Soft sot theory显示文摘 | Maji P K Biswas R Roy A R | 2003 | Computers & Mathematics with Applications2003，45，45： | 1 |
| 16 | An Application of Soft Sets in a Decision Making Problem显示文摘 | P K Maji A R Roy | 2002 | Computers & Mathematics with Applications2002，44，： | 1 |
| 17 | Effect of silica nanopowder on the properties of wood flour/polymer composite 显示文摘 | Deka B K Maji T K | 2012 | Polymer Engineering and Science2012，52，7： | 1 |
| 18 | Fuzzy Soft Sots显示文摘 | Maji P K Biswas R Roy A R | 2001 | Journal of Fuzzy Mathematics2001，9，3： | 1 |
| 19 | Fuzzy Soft Sets显示文摘 | Maji P K Biswas R Roy A R | 2001 | The Journal of Fuzzy Mathematics2001，9，3： | 1 |
| 20 | Synthesis and charac- terization of new pely( ether amide)s based on a new car- do monomer 显示文摘 | Maji S Sen S K Dasgupta B | 2009 | Pelym Adv Technol2009，20，4： | 1 |
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