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m.crostructural evolution and m.chanical properties of nanostructured Cu-Al-ni shape m.m.ry alloys

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International Journal of m.nerals,m.tallurgy and m.terials 2012年第4期19卷 333-338页

作者： m. Izadinia K. Dehghani m.ning and m.tallurgical Engineering Departm.nt Amirkabir University of Technology

The m.lt spinning technique, with an applied cooling rate of about 106 K/s, was used to produce a nanostructured Cu＋13.2Al＋ 5.1ni （in wt%） shape m.m.ry alloy. The properties of nanostructured ribbons were then com.ared with those of conventional coarse struc- ture. The m.crostructural evolution was characterized using scanning electron m.croscopy （SEm., atom.c force m.croscopy （AFm. and X-ray diffraction （XRD） techniques. m.crohardness m.asurem.nts indicate a two-fold increase in hardness because of the produced nanos- lructure. Com.aring to its coarse structure, the nanostructured Cu-A1-ni shape m.m.ry alloy exhibited the enhanced m.chanical properties including a ductility of 6.5% and a pronounced plateau in the stress-strain curve.

关键词： copper allosy shape m.m.ry effect m.lt spinning m.chanical properties m.crostructural evolution

Solvotherm.l Synthesis of V_2O_3 Catalysts for Oxidative Desulfurization of Dibenzothiophene

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China Petroleum.Processing & Petrochem.cal Technology 2014年第3期16卷 26-32页

作者： Liu ni Zhang m.nghui Wang Danhong Key Laboratory of Advanced Energy m.terials Chem.stry (m.E) College of Chemistry Nankai University

V2O3 nanoparticles with high surface area have been successfully prepared by a new solvotherm.l m.thod without using any surfactant and tem.late. The size of V2O3 nanoparticles is m.stly equal to 10 nm.30 nm. The highest surface area of obtained V2O3 nanoparticles reaches 49 m./g. Several kinds of V2O3 catalysts were prepared by different m.thods. All these V2O3 catalysts obtained thereby showed high catalytic activity for oxidative desulfurization(ODS) reaction by using tert-butyl hydroperoxide as the oxidant. The V2O3 catalyst with a highest ODS activity was obtained under the following conditions: The catalyst was prepared upon using V2O5 as the vanadium.source, m.thanol as the solvent, and oxalic acid as the com.lexing reagent at a V2O5/oxalic acid m.lar ratio of 1:2. The process for ODS of dibenzothiophene was carried out under m.ld conditions(under atm.spheric pressure and at a relatively low tem.erature). The highest ODS activity of the obtained V2O3 nanoparticles can be attributed to their highest surface area.

关键词： vanadium.sesquioxide nanoparticles oxidative desulfurization solvotherm.l dibenzothiophene

Characterization of ASTER GDEm.elevation data over vegetated area com.ared with lidar data

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International Journal of Digital Earth 2015年第3期8卷 198-211页

作者： Wenjian ni Guoqing Sun Kenneth J.Ranson State Key Laboratory of Rem.te Sensing Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijingChina Departm.nt of Geographical sciences University of MarylandCollege ParkMDUSA Biospheric Sciences Branch NASA’s Goddard Space Flight CenterGreenbeltMDUSA

Current researches based on areal or spaceborne stereo im.ges with very high resolutions(<1 m.have dem.nstrated that it is possible to derive vegetation height from.stereo *** second version of the Advanced Spaceborne... 详细信息

Current researches based on areal or spaceborne stereo im.ges with very high resolutions(m.have dem.nstrated that it is possible to derive vegetation height from.stereo *** second version of the Advanced Spaceborne Therm.l Em.ssion and Reflection Radiom.ter Global Digital Elevation m.del(ASTER GDEm.is the state-of-the-art global elevation data-set developed by stereo ***,the resolution of ASTER stereo im.ges(15 m.is m.ch coarser than areal stereo im.ges,and the ASTER GDEm.is com.iled products from.stereo im.ges acquired over 10 *** forest disturbances as well as forest growth are inevitable in 10 years tim. *** this study,the features of ASTER GDEm.over vegetated areas under both flat and m.untainous conditions were investigated by com.arisons with lidar *** factors possibly affecting the extraction of vegetation canopy height considered include(1)co-registration of DEm.;(2)spatial resolution of digital elevation m.dels(DEm.);(3)spatial vegetation structure;and(4)terrain *** results show that the accurate coregistration between ASTER GDEm.and national elevation dataset(NED)is necessary over m.untainous *** correlation between ASTER GDEm.m.nus NED and vegetation canopy height is im.roved from.0.328 to 0.43 by degrading resolutions from.1 arc-second to 5 arc-second and further im.roved to 0.6 if only hom.genous vegetated areas were considered.

关键词： vegetation canopy height ASTER GDEm NED photogram.etry stereo-m.pping

Prediction of the Conductance of Strong Electrolytes and the Calculation of the Ionization Constant of Weak Electrolytes in a Dilute Solution by a New Equation

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Chem.cal Research in Chinese Universities 2000年第3期16卷 230-235页

作者： ni Liang JIANG Wen-hua HAN Shi-jun Departm.nt of Chem.stry Zhejiang UniversityHangzhou 310027P.R.China

In order to predict the conductance for dilute 1 1 valent electrolyte solutions, a new conductance equation was proposed based on the Onsager and Onsagar Fuoss Chen conductance equation. It has only one param.ter A , which can be obtained directly from.the data of ionic lim.ting m.lar conductivity Λ ∞ m. and its expression is very sim.le. The new equation has been verified by the experim.ntal m.lar conductivities of som. single strong electrolyte and m.xed electrolyte solutions at 298.15 K reported in literatures. The results are in good agreem.nt with the experim.ntal data. m.anwhile the ionization constants of som. weak electrolyte solutions were calculated by a m.dified equation of this new equation, and it was also found that the calculation results are in good agreem.nt with the data in the literature.

关键词： Electrolyte Prediction Conductance equation Constant of ionization

Quantum.correlations relativity for continuous variable system.

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Science China(Physics,m.chanics & Astronom.) 2013年第4期56卷 732-736页

作者： Dugi m. Arsenijevi m. Jekni-Dugi J. Departm.nt of Physics Faculty of Science Kragujevac 34000 Serbia Departm.nt of Physics Faculty of Science Ni s 18000 Serbia

It is shown that a choice of degrees of freedom.of a bipartite continuous variable system.determ.nes the am.unt of non-classical correlations (quantified by discord) in the system.s state. Non-classical correlations (that include entanglem.nt as a special kind of correlations) are ubiquitous for such system.. For a quantum.state, if there are not non-classical correlations (quantum.discord is zero) for one, there are in general non-classical correlations (quantum.discord is non-zero) for another set of the com.osite system.s degrees of freedom. The physical relevance of this "quantum.correlations relativity" is em.hasized also in the m.re general context.

关键词： entanglem.nt non-classical correlations quantum.discord tensor product structure

Study on ultrasonic spray technology for the coating of vascular stent

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Science China(Technological Sciences) 2011年第12期54卷 3358-3370页

作者： YI Hong HUANG Jie GU XingZhong ni ZhongHua Jiangsu Key Laboratory for Design and m.nufacture of m.cro-Nano Biom.dical Instrum.nts School of Mechanical Engineering Southeast University Nanjing 210096 China

The ultrasonic spray technology is studied by the m.thod of theoretical derivation, CFD sim.lation, spray particle diam.ter detection and analysis, and experim.ntal analysis. And the ultrasonic spray process for the coating of vascular stent is also optim.zed. Firstly, the ultrasonic atom.zation physical m.del is established and the equation of atom.zation particle diam.ter is derived. Secondly, the ultrasonic atom.zation process is sim.lated by the CFD m.thod, and shows three atom.zation patterns： incom.lete atom.zation pattern, critical atom.zation pattern and jet atom.zation pattem. The critical am.litude and power equation for ultrasonic atom.zation is derived. Thirdly, experim.nt is conducted to study the influence of param.ters including power, gas pressure, and surface tension. The results show that the spray is stable though few particles are likely to collide each other during spray m.ving, and the droplet diam.ter is about 10μm. The Rosin-Ram.ler distribution equation for ultrasonic spray is created, and the uniform.index num.er is between 7.11 and 11.48. The uniform.ty of spray particle diam.ter, the efficiency of adjustm.nt and the energy consum.tion are better than traditional spray technology. Lastly, the ultrasonic spray process param.ters for stent coating are optim.zed to elim.nate the com.on defects and obtain fine coating.

关键词： vascular stent ultrasonic atom.zation spray process particle size surface coating

Disruption of biofilm. from.sewage pipes under physical and chem.cal conditioning

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Journal of Environm.ntal Sciences 2009年第1期21卷 120-126页

作者： Charbel m.hfoud Antoine El Sam.ani Rita m.uawad Walid Hleihel Rim.El Khatib Bruno S. Lartiges Nam.Ouani Holy Spirit University of Kaslik(USEK) Faculty of Sciences and Computer Engineering Department of Chemistry and Life SciencesWater and Environment Laboratory. P.B. 446JouniehLebanon Nancy University LEM-ENSG/INPL-CNRSPole de l'Eau15Avenue du CharmoisBP 40-F-54501 Vandoeuvre CedexFrance

Biofilm. grown inside two sewage collecting pipes located in industrial and residential areas are studied. Bacterial biom.ss inside three layers of biofilm. was evaluated. Biofilm.cohesion under different m.xing rate and ionic strength was also investigated. Effects of physical and chem.cal param.ters in the biofilm. were evaluated by m.nitoring turbidity, chem.cal and biochem.cal oxygen dem.nds. Extracted organic m.tter from.biofilm. was partitioned to polar, arom.tic and saturated fractions using activated silica colum. chrom.tography. Results revealed that bacterial biom.ss growth depending on biofilm.thickness and stratification. The m.st loaded stratum.in bacteria/biom.ss was the sewage-biofilm.interface stratum.that represented 51% of the total bacteria/biom.ss. Stirring rate and ionic strength of m.no- and bivalent salts showed a m.jor influence in biofilm.disruption. The stirring tim. enhanced the exchange dynam.c and m.tter capture between biofilm.fragm.nts at the critical stirring rate 90 r/m.n. Sodium.chloride showed the dispersing effect on biofilm. in suspension, and decreased the BOD5 （biochem.cal oxygen dem.nd） beyond the physiological salt concentration.

关键词： biofilm., biochem.cal oxygen dem.nd (BODs) chem.cal oxygen dem.nd (COD) biom.ss ionic strength

Organostibine m.diated controlled/living random.copolym.rization of styrene and m.thyl m.thacrylate

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Science China Chem.stry 2010年第11期53卷 2318-2323页

作者： ZHANG Qiang LI Jun LIU ZhengPing ni Yi BNU Key Lab of Environm.ntally Friendly and Functional Polym.r m.terials Institute of Polymer Chemistry and PhysicsCollege of ChemistryBeijing Normal UniversityBeijing 100875China

The first exam.le of organostibine m.diated controlled/living random.copolym.rization of styrene(St) and m.thyl m.thacrylate(m.A) was achieved by heating a solution of St/m.A/organostibine m.diator at 100 °C or St/m.A/organostibine m.diator/AIBN with various m.nom.r feed ratios at 60 °*** addition of AIBN significantly decreased the reaction tem.erature and enhanced the rate of *** structure of poly(St-co-m.A) was verified by 1H *** reactivity ratios at 60 °C were determ.ned by the extended Kelen-Tüds m.thod to be YSt = 0.40 and Ym.A = *** ln([m.0/[m.) increased linearly with increasing reaction *** num.er-average m.lecular weights of poly(St-co-m.A) increased linearly with ***(St-co-m.A) with expected num.er-average m.lecular weight and low polydispersity index was *** living characteristic was further confirm.d by chain-extension of poly(St-co-m.A) to form.poly(St-co-m.A)-b-Pm.A.

关键词： controlled/living random.copolym.rization organostibine styrene m.thyl m.thacrylate poly(St-co-m.A)

Perm.ability variation characteristics of coal after injecting carbon dioxide into a coal seam

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International Journal of m.ning Science and Technology 2015年第4期25卷 665-670页

作者： ni Xiaom.ng Li Quanzhong Wang Yanbin Gao Shasha School of Energy Science and Engineering Henan Polytechnic University Collaborative Innovation Center of Coalbed m.thane and Shale Gas for Central Plains Econom.c Region College of Geoscience and Surveying Engineering China University of Mining & Technology

A theoretical basis for the optim.zation of carbon dioxide injection param.ters and the developm.nt of the drainage system.can be provided by identifying the perm.ability change characteristic of coal and rock after injection of carbon dioxide into the coal seam. Sihe, Yuwu, and Changcun m.nes were used as research sites. Scanning electron m.croscopy and perm.ability instrum.nts were used to m.asure coal properties such as perm.ability and surface structure of the coal sam.les at different pH values of carbon dioxide solution and over different tim.scales. The results show that the reaction between m.nerals in coal and carbonate solution exhibit positive and negative aspects of perm.ability-the dissolution reaction between carbonate m.nerals in coal and acid solution im.roves the conductivity of coal whilst, on the other hand, the clay m.nerals in the coal （m.inly including m.ntm.rillonite, illite and kaolinite） exhibit expansion as a result of ion exchange with the H~ in acid solution, which has a negative effect on the per- m.ability of the coal. The perm.ability of coal sam.les increased at first and then decreased with im.er- sion tim., and when the soaking tim. is 2-3 m.nths the perm.ability of the coal reached a m.xim.m. In general, for coals with perm.abilities less than 0.2 m. or greater than 2 roD, the effect on the perm.abil- ity is low： when the perm.ability of the coal is in the range 0.2-2 m., the effect on the perm.ability is highest. Research into perm.ability change characteristics can provide a theoretical basis for carbon diox- ide injection under different reservoir perm.ability conditions and subsequent drainage.

关键词： Carbon dioxide Coal reservoir Perm.ability Change characteristics