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| 1 | An analytical solution to contaminant transport through composite liners with geomembrane defects显示文摘To investigate the performance of landfill composite liner system,a one-dimensional model was developed for solute transport through composite liners containing geomembrane defects.An analytical solution to the model was obtained by the method of Laplace transformation.The results obtained by the presented solution agree well with those obtained by the numerical method.Results show that leachate head and construction quality of geomembrane(GM) have significant influences on the performance of the composite liners for heavy metal ions.The breakthrough time of lead decreases from 50 a to 19 a when the leachate head increases from 0.3 m to 10 m.It is also indicated that the contaminant mass flux of volatile organic compounds(VOCs) induced by leakage can not be neglected in case of poor construction quality of the landfill barrier system.It is shown that diffusion coefficient and partition coefficient of GM have great influences on solute transport through composite liners for VOCs.The breakthrough time of heavy metal ions will be greatly overestimated if the effects of diffusion and adsorption of clay and geosynthetic clay liner(GCL) are neglected.The composite liner consisting of a geomembrane and a GCL provides a poor barrier for VOCs.The presented analytical solution is relatively simple to apply and can be used for preliminary design of composite liners,evaluating experimental results,and verifying more complex numerical models. | XIE HaiJian1,2,CHEN YunMin1 & LOU ZhangHua1,2 1MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Zhejiang University,Hangzhou 310058,China 2Institute of Hydrology and Water Resources Engineering,Zhejiang University,Hangzhou 310058,China | 2010 | Science China(Technological Sciences)2010，53，5： | 15 |
| 2 | Total knee arthroplasty and fractures of the tibial plateau显示文摘Tibial plateau fractures are common injuries that occur in a bimodal age distribution. While there are various treatment options for displaced tibial plateau fractures, the standard of care is open reduction and internal fixation(ORIF). In physiologically young patients with higher demand and better bone quality, ORIF is the preferred method of treating these fractures. However, future total knee arthroplasty(TKA) is a consideration in these patients as post-traumatic osteoarthritis is a common long-term complication of tibial plateau fractures. In older, lower demand patients, ORIF is potentially less favorable for a variety of reasons, namely fixation failure and the need for delayed weight bearing. In some of these patients, TKA can be considered as primary mode of treatment. This paper will review the literature surrounding TKA as both primary treatment and as a salvage measure in patients with fractures of the tibial plateau. The outcomes, complications, techniques and surgical challenges are also discussed. | Kenneth A Softness Ryan S Murray Brian G Evans | 2017 | World Journal of Orthopedics2017，8，2： | 15 |
| 3 | Shear wave velocity-based liquefaction evaluation in the great Wenchuan earthquake: a preliminary case study显示文摘The great Wenchuan earthquake(Ms = 8.0) in 2008 caused severe damage in the western part of the Chengdu Plain.Soil liquefaction was one of the major causes of damage in the plain areas,and proper evaluation of liquefaction potential is important in the defi nition of the seismic hazard facing a given region and post-earthquake reconstruction.In this paper,a simplifi ed procedure is proposed for liquefaction assessment of sandy deposits using shear wave velocity(Vs),and soil liquefaction from the Banqiao School site was preliminarily investigated after the earthquake.Boreholes were made at the site and shear wave velocities were measured both by SASW and down-hole methods.Based on the in-situ soil information and Vs profi les,the liquefaction potential of this site was evaluated.The results are reasonably consistent with the actual fi eld behavior observed after the earthquake,indicating that the proposed procedure is effective.The possible effects of gravel and fi nes contents on liquefaction of sandy soils were also brie? y discussed. | Zhou Yanguo,Chen Yunmin and Ling Daosheng MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Institute of Geotechnical Engineering,Zhejiang University,Hangzhou 310058,China Assistant Professor Professor | 2009 | Earthquake Engineering and Engineering Vibration2009，8，2： | 9 |
| 4 | Modeling of multi-inclusion composites with interfacial imperfections:Micromechanical and numerical simulations显示文摘A micromechanical approach based on a two-layer built-in model and a numerical simulation based on boundary element method are proposed to predict the effective properties of the multi-inclusion composite with imperfect interfaces.The spring model is introduced to simulate the interface imperfection.These two methods are compared with each other,and good agreement is achieved.The effects of interface spring stiffness,volume ratio and stiffness of inclusions on the micro-and macro-mechanical behaviors of fiber-reinforced composites are investigated.It is shown that the developed micromechanical method is very comprehensive and efficient for fast prediction of effective properties of composites,while the numerical method is very accurate in detailed modeling of the mechanical behavior of composites with multiple inclusions. | CHEN WeiQiu 1,ZHU XingYi 2 &HUANG ZhiYi 2 1 Department of Engineering Mechanics,Yuquan Campus,Zhejiang University,Hangzhou 310027,China 2 Key Laboratory of Soft Soils and Geoenvironmental Engineering,Ministry of Education Department of Civil Engineering,Zijingang Campus,Zhejiang University,Hangzhou 310058,China | 2010 | Science China(Technological Sciences)2010，53，3： | 8 |
| 5 | Analysis of diffusion-adsorption equivalency of landfill liner systems for organic contaminants显示文摘The equivalence between multilayered barriers regarding diffusion and adsorption was studied. The bottom boundary of the liner system is defined by assuming concentration continuous and flux continuous conditions of the contaminant between the bottom liner layer and the underlying soil. Five different liner systems were compared in terms of solute breakthrough time. The results of the analysis showed that breakthrough time of the hydrophobic organic compounds for a 2-meter-thick compacted clay liner (CCL) could be 3-4 orders of magnitude is greater than the breakthrough time for a geosynthetic clay liner (GCL) composite liner. The GM/GCL and GM/CCL composite liner systems provide a better diffusion barrier for the hydrophilic organic compounds than that for the hydrophobic compounds due to their different Henry's coeffcient. The calculated breakthrough times of the organic contaminants for the Chinese standard liner systems were found to be generally greater than those for the GCL alternatives, for the specific conditions examined. If the distribution coeffcient increases to 2.8 for the hydrophobic compounds or 1.0 for the hydrophilic compounds, the thickness of the attenuation layer needed to achieve the same breakthrough time as the standard liner systems can be reduced by a factor of about 1.9-2.4. As far as diffusive and adsorption contaminant transport are concerned, GM or GCL is less effective than CCL. | XIE Haijian, CHEN Yunmin, KE Han, TANG Xiaowu, CHEN Renpeng MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310027, China. | 2009 | Journal of Environmental Sciences2009，21，4： | 8 |
| 6 | Guided wave propagation in multilayered piezoelectric structures显示文摘A general formulation of the method of the reverberation-ray matrix (MRRM) based on the state space formalism and plane wave expansion technique is presented for the analysis of guided waves in multilayered piezoelectric structures. Each layer of the structure is made of an arbitrarily anisotropic piezoelectric material. Since the state equation of each layer is derived from the three-dimensional theory of linear piezoelectricity, all wave modes are included in the formulation. Within the framework of the MRRM, the phase relation is properly established by excluding exponentially growing functions, while the scattering relation is also appropriately set up by avoiding matrix inversion operation. Consequently, the present MRRM is unconditionally numerically stable and free from computational limitations to the total number of layers, the thickness of individual layers, and the frequency range. Numerical examples are given to illustrate the good performance of the proposed formulation for the analysis of the dispersion characteristic of waves in layered piezoelectric structures. | GUO YongQiang1, CHEN WeiQiu2,3 & ZHANG YongLiang4 1 Key Laboratory of Mechanics on Disaster and Environment in Western China, Ministry of Education, and School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China 2 Key Laboratory of Soft Soils and Geoenvironmental Engineering, Ministry of Education, and Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China 3 Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China 4 School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，7： | 4 |
| 7 | Formation of hyperbranched polymers in atom transfer radical copolymerization of MMA and DVB显示文摘Hyperbranched poly(methyl methacrylate)s (HPMMAs) have been successfully prepared by atom transfer radical copolymerization of MMA and divinylbenzene (DVB).Kinetic study shows complete consumption of the initiator in 0.5 h,and relatively low polymerization rate when DVB content in the feed was high.By analyzing MALDI-TOF spectra of the resulting copolymers,the linear A n B (n=0,1,2,3) oligomers were formed in 0.5 h of polymerization,and then the oligomers reacted each other to form dimers,further reactions produced HPMMA.The SEC and NMR spectroscopies were used to trace the polymerization,and the results demonstrate that small amount of the branching reactions occur in the initial polymerization,and the branched polymers are significantly generated past a certain conversion depending upon the feed ratios.Raising the content of DVB in the monomer mixture can increase the pendent vinyl groups of the linear oligo-inimers,leading to gelation at low MMA conversion. | SUN Miao & PAN CaiYuan CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering,University of Science and Technology of China,Hefei 230026,China | 2010 | Science China Chemistry2010，53，12： | 4 |
| 8 | Synthesis and intrinsic blue fluorescence study of hyperbranched poly(ester-amide-ether)显示文摘A series of hyperbranched poly(ester-amide-ether)s (H-PEAEs) were synthesized via the A2+CB3 approach by the self-transesterification of ethyl ester-amide-ethers end-capped with three hydroxyl groups and ethyl ester group at two terminals.The molecular structures were characterized with 1H NMR and FT-IR spectroscopy.The number average molecular weights were estimated by GPC analysis to possess bimodal wide distribution from 1.57 to 2.09.The strong inherent blue fluorescence was observed at 330 nm for excitation and 390 nm for emission.Moreover,the emission intensity and fluorescence quantum yield increased along with the incorporated ether chain length,as well as almost linearly with the H-PEAE concentration in an aqueous solution.For comparing the fluorescence performance,the linear poly(ester-amide-ether) (L-PEAE) and hyperbranched poly(ester-amide) (H-PEA) were synthesized.The results showed that the coexistence of ether bond and carboxyl group in the molecular chain was essential for generating the strong fluorescence.However,the compact backbone of H-PEAE would be propitious to the enhancement of fluorescence properties. | ZHANG Yong,FU Qi & SHI WenFang CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering,University of Science and Technology of China,Hefei 230026,China | 2010 | Science China Chemistry2010，53，12： | 3 |
| 9 | Interference pattern generation and simulation in the single beam of a white light continuum显示文摘We demonstrate the interference phenomenon in the White Light Continuum(WLC) generated by a single femtosecond laser beam. Different kinds of spatial interference patterns of the WLC generation under various conditions were investigated. The spatial patterns were attributed to interference between the filaments in the WLC generated by the fundamental laser beam yielding the diffraction effect from spatial confinement. Simulations of different patterns were performed. By comparing the results of simulation with those of experiments,the distances of several micrometers between the neighboring filaments can be derived,which agree with the literature values from direct measurements. | YU ZhiHao & WENG YuXiang Laboratory of Soft Matter Physics,Institute of Physics,Chinese Academy of Sciences,and National Laboratory of Condensed Matter Physics,Beijing 100190,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，6： | 2 |
| 10 | Facile synthesis of dendrimer-like star-branched poly(isopropylacrylamide) via combination of click chemistry and atom transfer radical polymerization显示文摘We report a facile synthesis method of dendrimer-like star-branched poly(N-isopropylacrylamide) (PNIPAM) via the combination of click chemistry and atom transfer radical polymerization (ATRP) by employing the arm-first approach.First,the α-azido-ω-chloro-heterodifunctionalized building block,N3-PNIPAM-Cl (G0-Cl),was synthesized via ATRP by 3-azidopropyl 2-chloropropionate as the initiator.Taking advantage of click chemistry,the first generation (G1) of dendrimer-like star-branched PNIPAM,G1-(Cl)3,was facilely prepared via the click coupling reaction between G0-Cl and tripropargylamine.For the construction of second generation (G2) dendrimer-like star-branched PNIPAM,G2-(Cl)6,terminal chloride moieties of G1-(Cl)3 were first converted to azide,and then reacted with excess tripropargylamine to give G1-(alkynyl)6 ;G2-(Cl)6 was subsequently prepared via click reaction between G1-(alkynyl) 6 and G0-Cl.Gel permeation chromatography (GPC) and matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry were employed to confirm the successful construction of dendrimer-like star-branched polymers.The unique thermal phase transition behavior of this dendrimer-like star-branched polymer in aqueous solutions was further investigated by turbidimetry and micro-differential scanning calorimetry (Micro-DSC). | WAN XueJuan,XU Jian & LIU ShiYong CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering,Hefei National Laboratory for Physical Sciences at the Microscale,University of Science and Technology of China,Hefei 230026,China | 2010 | Science China Chemistry2010，53，12： | 2 |
| 11 | Analytical solution and semi-analytical solution for anisotropic functionally graded beam subject to arbitrary loading显示文摘Analytical and semi-analytical solutions are presented for anisotropic functionally graded beams subject to an arbitrary load,which can be expanded in terms of sinusoidal series.For plane stress problems,the stress function is assumed to consist of two parts,one being a product of a trigonometric function of the longitudinal coordinate(x) and an undetermined function of the thickness coordinate(y),and the other a linear polynomial of x with unknown coefficients depending on y.The governing equations satisfied by these y-dependent functions are derived.The expressions for stresses,resultant forces and displacements are then deduced,with integral constants determinable from the boundary conditions.While the analytical solution is derived for the beam with material coefficients varying exponentially or in a power law along the thickness,the semi-analytical solution is sought by making use of the sub-layer approximation for the beam with an arbitrary variation of material parameters along the thickness.The present analysis is applicable to beams with various boundary conditions at the two ends.Three numerical examples are presented for validation of the theory and illustration of the effects of certain parameters. | HUANG DeJin1,2,DING HaoJiang1 & CHEN WeiQiu3 1 Key Laboratory of Soft Soils and Geoenvironmental Engineering,Ministry of Education,Zhejiang University,Hangzhou 310027,China 2 Faculty of Engineering,Ningbo University,Ningbo 315211,China 3 Department of Engineering Mechanics,Zhejiang University,Hangzhou 310027,China | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，8： | 2 |
| 12 | 显示文摘 | Fedi S Soft F Brogi D | 2003 | Thromb Haemost2003，90，6： | 1 |
| 13 | Frequent periodic leg movement during sleep is associated with left ventricular hypertrophy and adverse cardiovascular outcomes显示文摘 | Mirza M Shen W K Soft A | | 0，，07： | 1 |
| 14 | The clays, Part II: Permeability characteristics显示文摘 | TAVENAS F LEBLOND permeability of natural soft P JEAN P | 1983 | Canadian Geotechnical Journal1983，20，4： | 1 |
| 15 | Ozonation of 1,2-dihydroxybenzene in the presence of activated carbon 显示文摘 | Zaror C Soft G Valdes H | 2001 | Wat Sci and Technol2001，44，5： | 1 |
| 16 | Prognostic factors in colorectal cancer literature review for clinical application显示文摘 | Ratto C Soft L Ippoliti M | 1998 | Dis colon Rectum1998，41，： | 1 |
| 17 | Optimizaion of hybridized seawater desalination process显示文摘 | A1 -Soft M A -K Hassan A M Hamed O A | 2000 | Desalination2000，，131： | 1 |
| 18 | The use of sentinel infant mice for virus isolation 显示文摘 | Softly A Stanley N F | 1965 | Aust J Exp Biol Med Sci1965，43，17： | 1 |
| 19 | Engineering properties of inorganic polymer concretes (IPCs) 显示文摘 | Soft M van Deventer J S J Mendis P A | 2007 | Cement and Concrete Research2007，37，： | 1 |
| 20 | Venous thromboembolic disease in users of low-estrogen combined estrogen-progestin oral contraceptives 显示文摘 | Sidney S Petitti DB Soft GA | 2004 | Contraception2004，70，1： | 1 |
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