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| 1 | Simulation of spatially coupling dynamic response of train-track time-variant system显示文摘There exist three problems in the calculation of lateral vibration of the train-track time-variant system athome and abroad and the method to solve them is presented. Spatially coupling vibration analysis model of train-track time-variant system is put forward. Each vehicle is modeled as a multi-body system with 26 degrees of freedomand the action of coupler is also considered. The track structure is modeled as an assembly of track elements with 30degrees of freedom, then the spatially coupling vibration matrix equation of the train-track time-variant system is es-tablished on the basis of the principle of total potential energy with stationary value and the 'set-in-right-position'rule. The track vertical geometric irregularity is considered as the excitation source of the vertical vibration of thesystem, and the hunting wave of car bogie frame is taken as the excitation source of lateral vibration of the system.The spatially coupling vibration matrix equation of the system is solved by Wilson-θ direct integration method. Theapproximation of the calculated results to the spot test results demonstrates the feasibility and effectiveness of thepresented analysis method. Finally, some other vibration responses of the system are also obtained. | 向俊 李德建 曾庆元 | 2003 | Journal of Central South University of Technology2003，10，3： | 26 |
| 2 | Design,analysis and control of hybrid excited doubly salient stator-permanent-magnet motor显示文摘In this paper,a new hybrid excited doubly salient stator-permanent-magnet motor is proposed,where both permanent magnets and DC field windings are located in the stator.In theory,the mathematical model and design method of the motor are developed.The corresponding output power equation and the relationship between the flux control capability and the extended speed range are deduced in details.By using an efficient 'one-step' three-dimensional(3D) finite element method,the electromagnetic performances are analyzed,in which the leakage flux outside the stator circumference and end-effect are taken into account.Based on the operation principle of the motor,the control strategy and scheme are developed and implemented experimentally.Both experimental results and finite element analysis show that the proposed motor not only maintains the advantages of doubly salient permanent magnet motors,but also offers high energy efficiency over a wide speed range,which makes the motor an interesting candidate for electric vehicles. | ZHU XiaoYong1,2 & CHENG Ming1 1 Engineering Research Center for Motion Control of MOE,School of Electrical Engineering,Southeast University,Nanjing 210096,China 2 School of Electrical and Information Engineering,Jiangsu University,Zhenjiang 212013,China | 2010 | Science China(Technological Sciences)2010，53，1： | 16 |
| 3 | THEORETICAL CALCULATION OF VIBRATIONAL AND ROTATIONAL EXCITATION CROSS SECTIONS FOR He-H_2 COLLISION显示文摘In this paper, Tang-Toennies potential is applied to the He-H2 system and the variationof A, b and C2n with r is formulated. The dispersion coefficients obtained are in fairly goodagreement with those acquired by the universally accepted method of Meyer et al. and theyalso conform with the outcome that K. T. Tang and J. Peter Toennies achieved. As a result,the He-H2 potential function done by the author matches, when r and R are varied, the resu-1ts calculated by Meyer within large region. Using such a potential function, the author hascomputed the forty-four different kinds of vibrational and rotational excitation cross sectionsfor He-H2 collision, and conducted research on the changing patterns of the partial wavecross sections for elastic atom-molecule collision and the partial wave excitation cross sectionsfor inelastic collision with the increase of quantum number. | 杨向东 | 1991 | Science China Mathematics1991，34，1： | 14 |
| 4 | Application of thyristor controlled phase shifting transformer excitation impedance switching control to suppress short-circuit fault current level显示文摘Short-circuit fault current suppression is a very important issue in modern large-interconnected power networks. Conventional short-circuit current limiters, such as superconducting fault current limiters, have to increase additional equipment investments. Fast power electronics controlled flexible AC transmission system(FACTS)devices have opened a new way for suppressing the fault current levels, while maintaining their normal functionalities for steady-state and transient power system operation and control. Thyristor controlled phase shifting transformer(TCPST) is a beneficial FACTS device in modern power systems, which is capable of regulating regional powerflow. The mathematical model for TCPST under different operation modes is firstly investigated in this study. Intuitively, the phase shifting angle control can adjust the equivalent impedance of TCPST, but the effect has been demonstrated to be weak. Therefore, a novel transformer excitation impedance switching(EIS) control method, is proposed for fault current suppressing, according to the impedance characteristics of TCPST. Simulation results on IEEE 14-bus system have shown considerable current limiting characteristic of the EIS control under various fault types. Also, analysis of the timing requirement during fault interruption, overvoltage phenomenon, and ancillary mechanical support issues during EIS control is discussed,so as to implement the proposed EIS control properly for fast fault current suppression. | Jun LIU Xudong HAO Xu WANG Yefu CHEN Wanliang FANG Shuanbao NIU | 2018 | Journal of Modern Power Systems and Clean Energy2018，6，4： | 14 |
| 5 | Periodic and chaotic dynamics of composite laminated piezoelectric rectangular plate with one-to-two internal resonance显示文摘The bifurcations and chaotic dynamics of a simply supported symmetric cross-ply composite lami- nated piezoelectric rectangular plate are studied for the first time, which are simultaneously forced by the transverse, in-plane excitations and the excitation loaded by piezoelectric layers. Based on the Reddy’s third-order shear deformation plate theory, the nonlinear governing equations of motion for the composite laminated piezoelectric rectangular plate are derived by using the Hamilton’s principle. The Galerkin’s approach is used to discretize partial differential governing equations to a two-degree- of-freedom nonlinear system under combined the parametric and external excitations. The method of multiple scales is employed to obtain the four-dimensional averaged equation. Numerical method is utilized to find the periodic and chaotic responses of the composite laminated piezoelectric rectangular plate. The numerical results indicate the existence of the periodic and chaotic responses in the aver- aged equation. The influence of the transverse, in-plane and piezoelectric excitations on the bifurca- tions and chaotic behaviors of the composite laminated piezoelectric rectangular plate is investigated numerically. | ZHANG Wei YAO ZhiGang YAO MingHui | 2009 | Science China(Technological Sciences)2009，52，3： | 11 |
| 6 | Structural modal parameter identifi cation and damage diagnosis based on Hilbert-Huang transform显示文摘Traditional modal parameter identifi cation methods have many disadvantages,especially when used for processing nonlinear and non-stationary signals.In addition,they are usually not able to accurately identify the damping ratio and damage.In this study,methods based on the Hilbert-Huang transform(HHT) are investigated for structural modal parameter identifi cation and damage diagnosis.First,mirror extension and prediction via a radial basis function(RBF) neural network are used to restrain the troublesome end-effect issue in empirical mode decomposition(EMD),which is a crucial part of HHT.Then,the approaches based on HHT combined with other techniques,such as the random decrement technique(RDT),natural excitation technique(NExT) and stochastic subspace identifi cation(SSI),are proposed to identify modal parameters of structures.Furthermore,a damage diagnosis method based on the HHT is also proposed.Time-varying instantaneous frequency and instantaneous energy are used to identify the damage evolution of the structure.The relative amplitude of the Hilbert marginal spectrum is used to identify the damage location of the structure.Finally,acceleration records at gauge points from shaking table testing of a 12-story reinforced concrete frame model are taken to validate the proposed approaches.The results show that the proposed approaches based on HHT for modal parameter identifi cation and damage diagnosis are reliable and practical. | Han Jianping Zheng Peijuan Wang Hongtao | 2014 | Earthquake Engineering and Engineering Vibration2014，13，1： | 11 |
| 7 | Two-photon-excited near-infrared emissive carbon dotsas multifunctional agents for fluorescence imaging andphotothermal therapy显示文摘C dots (CDs) have shown great potential in bioimaging and phototherapy.However, it is challenging to manipulate their fluorescent properties andtherapeutic efficacy to satisfy the requirements for clinic applications. In thisstudy, we prepared S, Se-codoped CDs via a hydrothermal method anddemonstrated that the doping resulted in excitation wavelength-independentnear-infrared (NIR) emissions of the CDs, with peaks at 731 and 820 nm.Significantly, the CDs exhibited a photothermal conversion efficiency of -58.2%,which is the highest reported value for C nanostructures and is comparable tothat of Au nanostructures. Moreover, the CDs had a large two-photon absorptioncross section (-30,045 GM), which allowed NIR emissions and the photothermalconversion of the CDs through the two-photon excitation (TPE) mechanism. Invitro and in vivo tests suggested that CDs can function as new multi functionalphototheranostic agents for the TPE fluorescence imaging and photothermaltheraov of cancer cells. | Minhuan Lan Shaojing Zhao Zhenyu Zhang Li Yan Liang Guo Guangle Niu Jinfeng Zhang Junfang Zhao Hongyan Zhang Pengfei Wang Guangyu Zhu Chun-Sing Lee Wenjun Zhang | 2017 | Nano Research2017，10，9： | 9 |
| 8 | High resolution temperature measurement technique for measuring marine heat flow显示文摘High resolution temperature measurement technique is one of the key techniques for measuring marine heat flow. Basing on Pt1000 platinum resistance which has the characteristics of high accuracy and good stability, we designed a bridge reversal excitation circuit for high resolution temperature measurement. And the deep ocean floor in-situ test results show that: (1) temperature deviation and peak-to-peak resolution of the first version circuit board (V1) are 1.960-1.990 mK and 0.980-0.995 m Kat 1.2-2.7°C, respectively; and temperature deviation and peak-to-peak resolution of the second circuit board (V2) are 2.260mK and 1.130 mK at 1.2-1.3°C, respectively; (2) During the 2012NSFC-IndOcean cruise, seafloor geothermal gradient at Ind2012HF03,-07 and-12 stations (water depth ranges from 3841 to 4541 m) were successfully measured, the values are 59.1,75.1 and 71.6°C/km, respectively. And the measurement errors of geothermal gradient at these three stations are less than 3.0% in terms of the peak-to-peak resolution. These indicate that the high resolution temperature measurement technique based on Pt1000 platinum resistance in this paper can be applied to marine heat flow measurement to obtain high precision geothermal parameters. | QIN YangYang YANG XiaoQiu WU BaoZhen SUN ZhaoHua SHI XiaoBin | 2013 | Science China(Technological Sciences)2013，56，7： | 9 |
| 9 | Microscopic inspection and tracking of single upconversion nanoparticles in living cells显示文摘Nanoparticles have become new tools for cell biology imaging1,sub-cellular sensing2,super-resolution imaging3,4 and drug delivery5.Long-term 3D tracking of nanoparticles and their intracellular motions have advanced the understanding of endocytosis and exocytosis as well as of active transport processes6–8.The sophisticated operation of correlative optical-electron microscopy9,10 and scientific-grade cameras is often used to study intercellular processes.Nonetheless,most of these studies are still limited by the insufficient sensitivity for separating a single nanoparticle from a cluster of nanoparticles or their aggregates8,11,12.Here we report that our eyes can track a single fluorescent nanoparticle that emits over 4000 photons per 100 milliseconds under a simple microscope setup.By tracking a single nanoparticle with high temporal,spectral and spatial resolution,we show the measurement of the local viscosity of the intracellular environment.Moreover,beyond the colour domain and 3D position,we introduce excitation power density as the fifth dimension for our eyes to simultaneously discriminate multiple sets of single nanoparticles. | Fan Wang Shihui Wen Hao He Baoming Wang Zhiguang Zhou Olga Shimoni Dayong Jin | 2018 | Light(Science & Applications)2018，7，1： | 9 |
| 10 | Damage localization under ambient vibration using changes in flexibility显示文摘In recent years, Structural Health Monitoring (SHM) has emerged as a new research area in civil engineering. Mostexisting health monitoring methodologies require direct measurement of input excitation for implementation. However, in manycases, there is no easy way to measure these inputs - or alternatively to externally excite the structure. Therefore, SHM methodsbased on ambient vibration have become important in civil engineering. In this paper, an approach is proposed based on the DamageLocation Vector (DLV) method to handle the ambient vibration case. Here, this flexibility-matrix-based damage localization methodis combined with a modal expansion technique to eliminate the need to measure the input excitation. As a by-product of thisapproach, in addition to determining the location of the damage, an estimate of the damage extent also can be determined. Finally, anumerical example analyzing a truss structure with limited sensors and noisy measurement is provided to verify the efficacy of theproposed approach. | 高勇 苏磐石 | 2002 | Earthquake Engineering and Engineering Vibration2002，1，1： | 9 |
| 11 | Ultraviolet Super-Radiation Luminescence of Sputtering ZnO Film Under Cathode-Ray Excitation at Room Temperature显示文摘We report the observation of the cathode-ray(CR)pumped ultraviolet(UV)super-radiation luminescence in ZnO thin film at room temperature(RT).The dependence of UV(peak at about 390nm)and green(peak at about 520nm)luminescent peaks in ZnO thin film under CR excitation on excitation electron beam current has been investigated.With the increase of the density of excitation electron beam current,green peak relatively decreases and UV peak increases,resulting in a change of the luminescent color from green to blue-purple.The green peak intensity increases sublinearly with the increase of the electron beam current density and saturates at a relatively low density of electron beam current.But the intensity of 390nm UV peak increases superlinearly with the increase of the electron beam current density.This is a UV super-radiation luminescence of exciton in ZnO under high density pump.In this paper,three-dimensional atomic force microscope images of the surface of unannealled and annealled ZnO films are given. | 郭常新 傅竹西 施朝淑 | 1999 | Chinese Physics Letters1999，16，2： | 8 |
| 12 | Nonlinear dynamics of angle-ply composite laminated thin plate with third-order shear deformation显示文摘An asymptotic perturbation method is presented based on the Fourier expansion and temporal rescaling to investigate the nonlinear oscillations and chaotic dynamics of a simply supported angle-ply composite laminated rectangular thin plate with parametric and external excitations.According to the Reddy's third-order plate theory,the governing equations of motion for the angle-ply composite laminated rectangular thin plate are derived by using the Hamilton's principle.Then,the Galerkin procedure is applied to the partial differential governing equation to obtain a two-degrees-of-freedom nonlinear system including the quadratic and cubic nonlinear terms.Such equations are utilized to deal with the resonant case of 1:1 internal resonance and primary parametric resonance-1/2 subharmonic resonance.Furthermore,the stability analysis is given for the steady-state solutions of the averaged equation.Based on the averaged equation obtained by the asymptotic perturbation method,the phase portrait and power spectrum are used to analyze the multi-pulse chaotic motions of the angle-ply composite laminated rectangular thin plate.Under certain conditions the various chaotic motions of the angle-ply composite laminated rectangular thin plate are found. | GUO Xiang Ying,ZHANG Wei & YAO MingHui College of Mechanical Engineering,Beijing University of Technology,Beijing 100124,China | 2010 | Science China(Technological Sciences)2010，53，3： | 7 |
| 13 | Niobium pentoxide:a promising surface-enhanced Raman scattering active semiconductor substrate显示文摘Surface-enhanced Raman scattering technique,as a powerful tool to identify the molecular species,has been severely restricted to the noble metals.The surface-enhanced Raman scattering substrates based on semiconductors would overcome the shortcomings of metal substrates and promote development of surface-enhanced Raman scattering technique in surface science,spectroscopy,and biomedicine studies.However,the detection sensitivity and enhancement effects of semiconductor substrates are suffering from their weak activities.In this work,a semiconductor based on Nb_(2)O_(5) is reported as a new candidate for highly sensitive surfaceenhanced Raman scattering detection of dye molecules.The largest enhancement factor value greater than 107 was observed with the laser excitation at 633 and 780 nm for methylene blue detection.As far as literature review shows,this is in the rank of the highest sensitivity among semiconductor materials;even comparable to the metal nanostructure substrates with“hot spots”.The impressive surface-enhanced Raman scattering activities can be attributed to the chemical enhancement dominated by the photoinduced charge transfer,as well as the electromagnetic enhancement,which have been supported by the density-functional-theory and finite element method calculation results.The chemisorption of dye on Nb_(2)O_(5) creates a new highest occupied molecular orbital and lowest unoccupied molecular orbital contributed by both fragments in the molecule-Nb_(2)O_(5) system,which makes the charge transfer more feasible with longer excitation wavelength.In addition,the electromagnetic enhancement mechanism also accounts for two orders of magnitude enhancement in the overall enhancement factor value.This work has revealed Nb_(2)O_(5) nanoparticles as a new semiconductor surface-enhanced Raman scattering substrate that is able to replace noble metals and shows great potentials applied in the fields of biology related. | Yufeng Shan Zhihui Zheng Jianjun Liu Yong Yang Zhiyuan Li Zhengren Huang Dongliang Jiang | 2017 | npj Computational Materials2017，，1： | 7 |
| 14 | Characterization of the dissolved organic matter in sewage effluent of sequence batch reactor: the impact of carbon source显示文摘Dissolved organic matter (DOM) transforma- tion in sequence batch reactor (SBR) fed with carbon sources of different biodegradability was investigated. During the biologic degradation process, the low mole- cular weight (MW) fraction (〈 1 kDa) gradually decreased, while the refractory compounds with higher aromaticity were aggregated. Size exclusion chromatogra- phy (SEC) and fluorescence of excitation emission matrices (EEM) demonstrated that more biopolymers (polysaccharides or proteins) and humic-like substances were presented in the extracellular polymeric substance (EPS) extracted from the SBR fed with sodium acetate or glucose, while the EPS from SBR fed with slowly biodegradable dissolved organic carbon (DOC) substrate- starch had relatively less biopolymers. Comparing the EfOM in sewage effluent of three SBRs, the effluent from SBR fed with starch is more aromatic. Organic carbon with MW 〉 1 kDa as well as the hydrophobic fraction in DOM gradually increased with the carbon sources changing from sodium acetate to glucose and starch. The DOC fractiona- tion and the EEM all demonstrated that EfOM from the effluent of the SBR fed with starch contained more fulvic acid-like substances comparing with the SBR fed with sodium acetate and glucose. | Jin GUO Feng SHENG Jianhua GUO Xiong YANG Mintao MA Yongzhen PENG | 2012 | Frontiers of Environmental Science & Engineering2012，6，2： | 6 |
| 15 | Coupled flapwise-chordwise-axial-torsional dynamic responses of rotating pre-twisted and inclined cantilever beams subject to the base excitation显示文摘A rotating pre-twisted and inclined cantilever beam model (RPICBM) with the flapwise-chordwise-axial-torsional coupling is established with the Hamilton principle and the finite element (FE) method. The effectiveness of the model is verified via comparisons with the literatures and the FE models in ANSYS. The effects of the setting and pre-twisted angles on the dynamic responses of the RPICBM are analyzed. The results show that:(i) the increase in the setting or pre-twisted angle results in the increases in the first-order flapwise and torsional frequencies while the decrease in the first-order chordwise frequency under rotating conditions;(ii) a positive/negative setting angle leads to a positive/negative constant component, while a positive/negative pre-twisted angle leads to a negative/positive constant component;(iii) when the rotation speed is non-zero, the pre-twisted angle or non-zero setting angle will result in the coupled flapwise-chordwiseaxial- torsional vibration of the RPICBM under axial base excitation. | Jin ZENG Hui MA Kun YU Zhitao XU Bangchun WEN | 2019 | Applied Mathematics and Mechanics(English Edition)2019，40，8： | 6 |
| 16 | Semi-active control of a cable-stayed bridge under multiple-support excitations显示文摘This paper presents a semi-active strategy for seismic protection of a benchmark cable-stayed bridge with consideration of multiple-support excitations. In this control strategy, Magnetorheological (MR) dampers are proposed as control devices, a LQG-clipped-optimal control algorithm is employed. An active control strategy, shown in previous researches to perform well at controlling the benchmark bridge when uniform earthquake motion was assumed, is also used in this study to control this benchmark bridge with consideration of multiple-support excitations. The performance of active control system is compared to that of the presented semi-active control strategy. Because the MR fluid damper is a con-trollable energy- dissipation device that cannot add mechanical energy to the structural system, the proposed control strategy is fail-safe in that bounded-input, bounded-output stability of the controlled structure is guaranteed. The numerical results demonstrated that the performance of the presented control design is nearly the same as that of the active control system; and that the MR dampers can effectively be used to control seismically excited cable-stayed bridges with multiple-support excitations. | 代泽兵 黄金枝 王红霞 | 2004 | Journal of Zhejiang University-Science A(Applied Physics & Engineering)2004，5，3： | 6 |
| 17 | Advances of surface-enhanced Raman and IR spectroscopies: from nano/microstructures to macro-optical design显示文摘Raman and infrared(IR)spectroscopy are powerful analytical techniques,but have intrinsically low detection sensitivity.There have been three major steps(i)to advance the optical system of the light excitation,collection,and detection since 1920s,(ii)to utilize nanostructure-based surface-enhanced Raman scattering(SERS)and surface-enhanced infrared absorption(SEIRA)since 1990s,and(iii)to rationally couple(i)and(ii)for maximizing the total detection sensitivity since 2010s.After surveying the history of SERS and SEIRA,we outline the principle of plasmonics and the different mechanisms of SERS and SEIRA.We describe various interactions of light with nano/microstructures,localized surface plasmon,surface plasmon polariton,and lightning-rod effect.Their coupling effects can significantly increase the surface sensitivity by designing nanoparticle–nanoparticle and nanoparticle–substrate configuration.As the nano/microstructures have specific optical near-field and far-field behaviors,we focus on how to systematically design the macro-optical systems to maximize the excitation efficiency and detection sensitivity.We enumerate the key optical designs in particular ATR-based operation modes of directional excitation and emission from visible to IR spectral region.We also present some latest advancements on scanning-probe microscopy-based nanoscale spectroscopy.Finally,prospects and further developments of this field are given with emphasis on emerging techniques and methodologies. | Hai-Long Wang En-Ming You Rajapandiyan Panneerselvam Song-Yuan Ding Zhong-Qun Tian | 2021 | Light(Science & Applications)2021，10，9： | 5 |
| 18 | Hydrothermal synthesis and luminescent properties of BaMoO_4:Sm^(3+) red phosphor显示文摘Trivalent samarium doped barium molybdate(BaMoO_4:Sm^(3+)) red phosphor was successfully synthesized by hydrothermal method. The crystal structure, morphology and photoluminescent property were characterized by X-ray diffraction, field environmental scanning electron microscopy and photoluminescence spectroscopy. The results indicated that the synthesized BaMoO_4:Sm^(3+)phosphor consisted of a pure phase with an octahedral structure. The main excitation peaks were located at 362, 404, 445 and 477 nm, respectively, and were obviously observed. The main emission peaks were located at 533, 566, 602 and 646 nm, respectively. The phosphors exhibited a red performance at 646 nm, which was appropriate for the ultraviolet-light emitting diode(UV-LED) and blue LED. The luminescent intensity of BaMoO_4:Sm^(3+) increased with an increase in the doping amount of Sm^(3+). The luminescent intensity had the optimal value for x=0.03. When the doping amount of Sm^(3+) was further increased, the concentration quenching phenomenon was observed. Monovalent lithium(Li+) cation was used as a charge compensator. The luminescence intensity first increased with increasing Li+ doping concentration, and then decreased. The optimal content of Li+ was about 2%. The BaMoO_4:Sm^(3+) phosphor prepared in this study could act as superior red phosphor for white LEDs. | 李兆 王永锋 曹静 江元汝 赵西成 孟志新 | 2016 | Journal of Rare Earths2016，34，2： | 5 |
| 19 | Time-dependent density-functional theory molecular-dynamics study on amorphization of Sc-Sb-Te alloy under optical excitation显示文摘Recently,all-optical memory and optical-computation properties of phase-change materials are receiving intensive attention.Because writing/erasing information in these devices is usually achieved by laser pulses,the interaction between the laser and the phase-change materials becomes a key issue for such new applications.In this work,by a time-dependent density-functional theory molecular-dynamics study,the physics underlying the optical excitation induced amorphization of Sc-Sb-Te is revealed,which goes back to superatom-like Sc-centered structural motifs.These motifs are found to be still robust under the excitation. | Xue-Peng Wang Xian-Bin Li Nian-Ke Chen Junhyeok Bang Ryky Nelson Christina Ertural Richard Dronskowski Hong-Bo Sun Shengbai Zhang | 2020 | npj Computational Materials2020，，1： | 5 |
| 20 | Vibration test and analysis of Laoshan bicycle gymnasium for the Olympic Games under multi-support excitations显示文摘The vibration tests of Laoshan bicycle gymnasium for the Olympic Games are performed under multi-support excitations in order to verify the effectiveness of multi-support time history method. The excitation sources come from the impact forces acting on the ring beam of the reticulated structure, on the basis of which the records of motions of each excited point and corresponding structural vibration responses are all collected. The theoretical analytical model of the structure is further established and the structural dynamic responses are obtained subjected to the same excitation case via multi-support time history method. The calculation results are generally in agreement with those of the test in both time domain and frequency domain, which verify the effectiveness of multi-support time history method. The vibration test can also provide references for long-span structures under multi-support excitations. | YE JiHong ZHOU ShuLu BAO Wei WEI Zheng LI ZhiJun | 2008 | Science China(Technological Sciences)2008，51，9： | 5 |
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