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| 1 | Stochastic structural model of rock and soil aggregates by continuum-based discrete element method显示文摘This paper first presents a stochastic structural model to describe the random geometrical features of rock and soil aggregates. The stochastic structural model uses mixture ratio, rock size and rock shape to construct the microstructures of aggregates, and introduces two types of structural elements (block element and jointed element) and three types of material elements (rock element, soil element, and weaker jointed element) for this microstructure. Then, continuum-based discrete element method is used to study the deformation and failure mechanism of rock and soil aggregate through a series of loading tests. It is found that the stress-strain curve of rock and soil aggregates is nonlinear, and the failure is usually initialized from weaker jointed elements. Finally, some factors such as mixture ratio, rock size and rock shape are studied in detail. The numerical results are in good agreement with in situ test. Therefore, current model is effective for simulating the mechanical behaviors of rock and soil aggregates. | WANG Yuannian1, ZHAO Manhong1, LI Shihai1 & J.G. Wang21. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China 2. Tropical Marine Science Institute, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260 | 2005 | Science China(Technological Sciences)2005，48，z1： | 21 |
| 2 | Medaka fish stem cells and their applications显示文摘Stem cells are present in developing embryos and adult tissues of multicellular organisms. Owing to their unique features, stem cells provide excellent opportunities for experimental analyses of basic developmental processes such as pluripotency control and cell fate decision and for regenerative medicine by stem cell-based therapy. Stem cell cultures have been best studied in 3 vertebrate organisms. These are the mouse, human and a small laboratory fish called medaka. Specifically, medaka has given rise to the first embryonic stem (ES) cells besides the mouse, the first adult testis-derived male stem cells spermatogonia capable of test-tube sperm production, and most recently, even haploid ES cells capable of producing Holly, a semi-cloned fertile female medaka from a mosaic oocyte created by microinjecting a haploid ES cell nucleus directly into a normal oocyte. These breakthroughs make medaka a favoring vertebrate model for stem cell research, the topic of this review. | YI MeiSheng1, HONG Ni1, LI ZhenDong1, YAN Yan1,2, WANG DanKe1, ZHAO HaoBin1,3 & HONG YunHan1,4* 1Department of Biological Sciences, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore 2Division of Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637457, Singapore 3Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Huazhong Normal University, Wuhan 430079, China 4State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China | 2010 | Science China(Life Sciences)2010，53，4： | 10 |
| 3 | A THIRD-ORDER BOUSSINESQ MODEL APPLIED TO NONLINEAR EVOLUTION OF SHALLOW-WATER WAVES显示文摘The conventional Boussinesq model is extended to the third order in dispersion and nonlinearity. The new equations are shown to possess better linear dispersion characteristics. For the evolution of periodic waves over a constant depth, the computed wave envelops are spatially aperiodic and skew. The model is then applied to the study of wave focusing by a topographical lens and the results are compared with Whalin′s (1971) experimental data as well as some previous results from the conventional Boussinesq model. Encouragingly, improved agreement with Whalin′s experimental data is found. [WT5”HZ] | Zhang Ying long CCM MINDEF, Department of Mech. and Prod. Eng., National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260 Zhu Song ping Department of Mathematics, the University of Wollongong, Wollongong, NSW 2522, Australia | 2000 | Journal of Hydrodynamics2000，12，2： | 7 |
| 4 | CONVERGENCE OF CASCADE ALGORITHMS AND SMOOTHNESS OF REFINABLE DISTRIBUTIONS显示文摘In this paper, the author at first develops a method to study convergence of the cascadealgorithm in a Banach space without stable assumption on the initial (see Theorem 2.1), andthen applies the previous result on the convergence to characterizing compactly supportedrefinable distributions in fractional Sobolev spaces and Holder continuous spaces (see Theorems3.1, 3.3, and 3.4). Finally the author applies the above characterization to choosing appropriateinitial to guarantee the convergence of the cascade algorithm (see Theorem 4.2). | SUN QIYU Department of Mathematics, University of Houston, Houston, TX 77204, USA. Department of Mathematics, National University of Singapore, 10 Kent Ridge Crescent, 119260, Singapore. | 2003 | Chinese Annals of Mathematics,Series B2003，24，3： | 3 |
| 5 | TOF-SIMS analysis: Application to ultra-thin AWA film on magnetic head显示文摘F-containing polymer was coated on the magnetic head of hard disc drive (HDD) as theultra-thin (<20(?)) film of anti-wetting agent (AWA). A static TOF-SIMS method has been applied tomeasuring the thickness and coating uniformity of the ultra-thin film. TOF- SIMS is also used tostudy the micro-tribology and transfer of lubricant between the magnetic head and media interface. | JIANG Zhicheng LIU Yiwei, Wah-Fuk Chung Chi-Yue Cheung Ichiro Yagi TIAN Hong Surface Analysis Laboratory, SAE Magnetics (H. K.) Ltd., SAE Tower, 38-42 Kwai Fung Crescent, Kwai Chung, N. T., Hong Kong, China Visiting professor from Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences | 2001 | Science China Mathematics2001，44，S1： | 2 |
| 6 | Critical issues of m-learning: design models, adoption processes, and future trends显示文摘 | Mary Louise Crescente Doris Lee | 2011 | Journal of the Chinese Institute of Industrial Engineers2011，，2： | 2 |
| 7 | Experimental and discrete element numerical analysis of side slope instability induced by fissure water underlying impervious bed显示文摘When the sliding mass contains impervious bed, rainfall can infiltrate into mountain via crevices and form higher artesian aquifer at impervious bed inferior. This will decrease slip resistance and increase sliding forces of the sliding mass, thus lowering the safety factor, and inducing landslide disasters. In this paper, a landslide experimental apparatus is designed for experimental studies on the mechanism of this type of landslides. Meanwhile, the non-dimensional parameters in the model experiment are taken into account using dimensional analysis. The experimental results show that (1) the ratio of the cleft water pressure to the overlying pressure is a crucial parameter affecting the stability of the slope; (2) when the shut-in pressure reaches 80% of the normal component of the pressure on the slip surface made up of rock and soil, landslide will occur; (3) the whole slope will start to slide when the shut-in pressure is equal to the normal component of the pressure formed by the overlying rock and soil on the upper 30% area. In this article, a discrete element method simulation is used to investigate the influence of cleft water pressure and shearing strength on the landslide stability. It can be concluded that the critical value of Ccr, ?cr, which determines the slide mass stability, increases with the increase of the water pressure; if the water pressure reaches a high level, the stability of the slide mass depends mainly on C, while the influence of ? becomes smaller than C. | LIU Bingshan1, LI Shihai1, ZHANG Lei1,2 & WANG Jianguo31. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China 2. Graduate School, Chinese Academy of Sciences, Beijing 100060, China 3. Tropical Marine Science Institute, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260 | 2005 | Science China(Technological Sciences)2005，48，z1： | 2 |
| 8 | The accumulation of lead in agricultural soil and vegetation along a highway显示文摘 | Taglioni S Crescente M F | 1992 | Chemosphere1992，24，： | 1 |
| 9 | Long-term monitoring ofmetal pollution by urban trees 显示文摘 | Gratani L Crescente M F Varone L | 2008 | Atmospheric Environment2008，42，35： | 1 |
| 10 | Relationship between leaf life-span and photosynthetic activity of Quercus ilex in polluted urban areas (Rome) 显示文摘 | Gratani L Crescente M F Petruzzi M | 2000 | Environmental Pollution2000，110，： | 1 |
| 11 | Long-term Monitoring of Metal Pollution by Urban Trees 显示文摘 | Gratani L Crescente M F Varone L | 2008 | Atmospheric Environment2008，42，35： | 1 |
| 12 | Antibacterial activity of marine-derived fungi显示文摘 | Carsten Christophersen Oscar Crescente Jens C. Frisvad Lone Gram Joan Nielsen Per Halfdan Nielsen Lisa Rahb?k | 1998 | Mycopathologia1998，，3： | 1 |
| 13 | A systematic review显示文摘 | Crescente M Di Castelnuovo A lacoviello I Response variability to aspirin as assessed by the platelet function analyzer(PFA)-100 | 2008 | Thromb Haemost2008，99，1： | 1 |
| 14 | Advanced wet cleaning post-CMP-application to reclaim wafers显示文摘 | ABBADIE A CRESCENTE F SEMERIA M N | 2004 | Journal of the Electrochemical Society2004，151，1： | 1 |
| 15 | Epoprostenol in- hibits human platelet-leukocyte mixed conjugate and platelet microparticle formation in whole blood 显示文摘 | Tamburrelli C Crescente M Izzi B | 2011 | Thromb Res2011，128，5： | 1 |
| 16 | Antibacterial activity of marine-derived fungi显示文摘 | Christophersen C Crescente O Frisvad J C | 1999 | Mycopathologia1999，143，： | 1 |
| 17 | Relationship between leaf life-span and photosynthetic activity of Quereus ilex in polluted urban areas (Rome) 显示文摘 | Gratani L Crescente M F Petruzzi M | 2000 | Environmental Pollution2000，110，： | 1 |
| 18 | A new cold hardy high quality, whitewine variety 显示文摘 | Hemstad P R Luby J L Crescent L | 2003 | Acta Hort2003，，603： | 1 |
| 19 | Antibacterial activity of marine-derived fungi显示文摘 | CHRISTOPHERSEN C CRESCENTE O FRISVAD J C | 1999 | Mycopathologia1999，143，： | 1 |
| 20 | Agomelatine reverses the decrease in hippocampal cell survival induced by chronic mild stress显示文摘 | Dagyte G Crescente I Postema F | 2011 | Behav Brain Res2011，218，1： | 1 |
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