最新刊期
      卷 50 ， 期 3 ， 2011
      • Vol. 50, Issue 3, Pages: 1-7(2011)
        摘要：Transmission channel of ubiquitous computing environments always has high bit error rates. Current coding techniques for 3-D graphic models mainly focus on coding efficiency, which makes them extremely sensitive to channel errors due to their irregular mesh structure. A new approach for error-resilient coding of arbitrary 3-D graphic models is introduced. Since the surface geometry of an arbitrary structure is re-sampled on a regular domain grid, and correlation between data is greatly reduced, error-resilient can be fundamentally improved. In order to improve the coding efficiency, error resilient geometry image compression coding scheme is introduced. To ensure that the reconstructed model is faithful to the original model, an extended bounded-distortion piecewise mesh parameterization method is proposed. Simulation results have demonstrated that the proposed coding algorithm can not only reconstruct 3-D mesh surfaces faithfully but also save storage space and be error-resilient.  
        关键词：3-D graphic Model;ErrorResilient coding;geometry image   
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      • ZHAO Huiyan
        Vol. 50, Issue 3, Pages: 8-10(2011)
        摘要：For onedimensional SDE Xt=x+∑∞i=1∫t0σi(Xs)dWis+∫t0b(Xs)ds, where Wi,i=1,2,…, is an infinite sequence of independent standard Brownian motions, pathwise uniqueness of solutions with nonconcave and nonLipschitz drift coefficients is proved.  
        关键词：pathwise uniqueness;strong solution;nonLipschitz condition   
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      • JIANG Hongling,
        Vol. 50, Issue 3, Pages: 11-16(2011)
        摘要：The coexistence of the steadystate solutions of an unstirred multiple food chain Chemostat model with Beddington-DeAngelis functional response is discussed The necessary condition is given by comparison theorem of eigenvalue By using degree theory, index of fixed point of map in cone,and spectral radius of differentiation operator theory, a sufficient condition is obtained for the existence of steady state positive solution The coexistence is verified by numerical simulation with MATLAB software.  
        关键词：Chemostat;comparison theorem of eigenvalue;index of fixed point;numerical simulation   
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      • Vol. 50, Issue 3, Pages: 17-21(2011)
        摘要：The following third order nonlinear p-Laplacian threepoint boundary value problems on time scales［Φp(p(t)uΔ(t))］Δ+a(t)f(t,u(t))=0,t∈［0,T］,βu(0)－γuΔ(0)=0,uΔ(T)=αu(η),uΔ(0)=0are studied. By means of five functionals fixed point theorems in cones, some new results for the existence of at least three positive solutions of the boundary value problem are obtained. As an application, an example is given to illustrate the main result.  
        关键词：time scales;boundary value problem;positive solutions;fixed point theorem   
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      • Vol. 50, Issue 3, Pages: 22-26(2011)
        摘要：The delayed feedback control problem is studied for a class of continuoustime fuzzy systems with timevarying delay. Based on a new fuzzy LyapunovKrasovskii functional (LKF), a delay-dependent stability criterion is derived for the open-loop fuzzy systems. Less conservative results are obtained by considering the additional useful terms when estimating the upper bound of the derivative of LKF and introducing new fuzzy free weighting matrices. Then based on parallel distributed compensation (PDC), a delay-dependent stabilization condition is derived in terms of linear matrix inequalities (LMIs) and the corresponding controller can be obtained by solving a set of LMIs. Finally, simulation examples show the effectiveness of the proposed method.  
        关键词：delaydependent stability;fuzzy LyapunovKrasovskii functional;delayed feedback;linear matrix inequality   
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      • Vol. 50, Issue 3, Pages: 27-30(2011)
        摘要：A fast multiscale Galerkin method for solving eigenvalue problem of compact integral operator with symmetrical and smooth kernel is developed. Through corresponding truncation strategy,it is proved that the order of convergence and the computational complexity are both almost optimal.  
        关键词：compact operator;eigenvalue;multiscale Galerkin algorithms   
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      • Vol. 50, Issue 3, Pages: 31-34(2011)
        摘要：Differential hysteresis loop of Ba0.95Sr0.05TiO3ferroelectric ceramics has been measured. It is found that the polarization fatigue in BST ceramics can be divided into three stages. The first stage when reversal numberNis between 105to 106is dominated by aged effects. In the second stage whereNis from 106to108fatigue effect appears. In the third stage whenNis larger than 108the sample is almost totally fatigued and can not be considered as a ferroelectrics.  
        关键词：BST ceramics;differential hysteresis loop;polarization fatigue   
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      • Vol. 50, Issue 3, Pages: 35-41(2011)
        摘要：High efficiency solar cells are development goal of Solar cell industry. Plasmonic solar cell technology is one of technologies of high efficiency solar cells which have been researched actively in recent years. The research progress of plasmonic solar cell, from principle, materials to technology, was discussed comprehensively. Surface plasmon resonance effect of noble metal nanoparticles was used to enhance optical absorption in plasmonic solar cells. The technology can be used both in traditional silicon solar cells and thin film solar cells, especially in light trapping structure design of thin film solar cells. Moreover, the technology can easy combine with traditional manufacturing process and has the potential to achieve commercialization.  
        关键词：metal nanoparticle;solar cell;surface plasmons   
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      • Vol. 50, Issue 3, Pages: 42-47(2011)
        摘要：Vehicle′s positioning and monitoring are more and more popular. However, mass vehicles′ presentation is slow and their coverage rate is smaller than enough. To deal with the issues mentioned above,a mass monitored vehicles′ presentation model is provided based on multilayer grid, and a multilayer grid index is established, to aggregates overlapping vehicles dynamically combined with map scale.This method makes full overlay of monitored vehicles, reduces data transmission and improves the speed of vehicles′ presentation.At last, this model is verified through the application of Key Vehicles Monitoring System in Guangdong Province.  
        关键词：vehicles monitoring;grid Index;multilayer grid;presentation model   
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      • Vol. 50, Issue 3, Pages: 48-52(2011)
        摘要：According to the characteristic of submarine gas hydrates and combining the working principle of Cutter Suction Dredger and the exploitation technique of the polymetallic nodule mining in ocean, a new exploitation mode named cuttersuction marine gas hydrate was proposed and used to resolve the technology bottleneck restrict that the gas hydrates under the sea couldnt be exploited without a close exploiting environment. And then based on the pipeline transporting principle and the two-phase flow theory, the hydraulic transmission system was analyzed. The result shows that the hydraulic with volume concentration of 15% to 25% pumped upon to the sea-surface from 1 000 m depth only needs deliverylift about 30 m to 50 m,and pumped from 4 000 m with volume concentration of 10% to 20% only needs deliverylift about 90 m to 150 m which the common double channel impeller pump present having also can meet the requirements; besides the stiffness of the gas hydrate and the submarine sediment are low, and the density of their compound fluid is similar to the seawater, so the gas hydrate transported directly by slurry pump will not cause the slurry pump wearing badly which can keep the system working stably for a long time. Consequently, the cuttersuction exploitation mode of marine gas hydrate is feasible in theory.  
        关键词：cuttersuction;gas hydrate;hydraulic conveying;slurry pump   
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      • TAN Haishu,ZHAO Huimin,,ZHU Li,GUO Yizhen,DING Xiaoyan
        Vol. 50, Issue 3, Pages: 53-56(2011)
        摘要：An information hiding detection method is proposed combining 2-D Markov chain of thresholded predictionerror image and Support Vector Machines as classifier. As embedding data rate being 0.1 bpp (bits per pixel), experimental investigation utilizing spread spectrum (SS) and a generic QIM method data hiding method respectively , correction detection rates are all above 90% . For generic LSB method ,the method achieves a detection rate from 50% to 90% above with 001bpp-0.3bpp various embedding data rates.  
        关键词：information hiding;Markov Chain;predictionerror;Support Vector Machines;detection   
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      • Vol. 50, Issue 3, Pages: 57-61(2011)
        摘要：A creep analysis method for reinforced concrete members under eccentric compression is presented as considering the effect of steel reinforcements on creep. Effective area is defined to quantify the effect of steel reinforcement on creep. The relationship between the effective area and the actual area of steel reinforcement is obtained by the principle of bend moment equivalent. The effective reinforcement ratio is derived. With this ratio, the creep stress of reinforced concrete members under eccentric compression can be calculated like those under axial compression. Numerical examples are given to illustrate the application of the proposed approach. It is shown，through the examples，that the proposed method is wellmatched in the accuracy with the method which makes use of the aging coefficient. Avoiding calculating the characteristic of the net concrete section and solving the algebraic equations, the proposed method is convenient in use. It is suitable for the creep analysis of reinforced concrete members under eccentric compression, especially for the members with multilayers of steel reinforcements.  
        关键词：reinforced concrete members under eccentric compression;multilayers of steel;creep;creep stress   
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      • Vol. 50, Issue 3, Pages: 62-67(2011)
        摘要：(1-x)Pb(Fe1/2Nb1/2)O3-xPbTiO3(PFN-PT) ferroelectric ceramics were prepared by the conventional ceramic processing via the wolframite precursor method. The X-ray diffraction (XRD) measurement and density measurement confirmed that the PFN-PT ceramics sintered at 1 150 ℃ for 2.5 h exhibited pure perovskite structure and high relative density. With the increase of the content of PbTiO3(PT), the crystal structure of PFN-PT changed gradually from the rhombohedral perovskite structure to the tetragonal perovskite structure, while the cell volume decreased and the tetragonality (defined as the ratio of the cell parameters c/a) of the perovskite structure increased. The PFNPT ceramics exhibited apparent dielectric frequency dispersion. With the increase of the PT content, the temperature of dielectric maximum Tm/TCincreased, the dielectric response character changed from diffused and broad dielectric peaks to relatively sharper ones, the dielectric loss decreased, and the frequency dispersion became weak. The doping of MnO2improved dielectric property of the PFN-PT ceramics effectively, in which the values of dielectric constant maximum εmand roomtemperature dielectric loss tan δ were 13 254 and 0.003 63, respectively, at 100 kHz, and the values of saturation polarizationPscoercive fieldEcand piezoelectric constant d33 were 6.18 μC/cm21.1 kV/mm and 98pC/N, respectively, of the 0.25% MnO2doped 0.66PFN-0.34PT ceramics.  
        关键词：lead iron niobate-lead titanate;perovskite;structural phase transition;electrical property   
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      • Vol. 50, Issue 3, Pages: 68-73(2011)
        摘要：Electrochemical properties of the PW11Cr(Ⅲ)O4-39(PW11Cr) in H3PO4-HAc-H3BO3(pH 2.16) buffer were investigated in detail by cyclic voltammetry, AC voltammograms and alternating current impedance analyses. The result of cyclic voltammogram showed that three pairs of redox waves were observed on the glassy carbon (GC) electrode in H3PO4-HAc-H3BO3(pH 2.16) buffer solution containing 1.0 mmol12539;L-1PW11Cr. The pair of quasireversible wave at 1.30/0.631 V belonged to Cr(Ⅴ)/Cr(Ⅲ) two-electron redox, while the two pairs of reversible waved at -0.553/-0.505 V and -0.782/-0.725 V belonged to W-O skeleton twoelectron redox. When the pH value increased, the peak potential of the three pairs of twoelectron waves shifted negatively and the peak current decreased, which showed that H+was involved in the electrode process. In addition, the difference of peak potential between anode and cathode for each pair of waves increased, which showed reversibility of electrode process decreased. The diffusion coefficientDOof PW11Cr calculated from linear relationship of peak current of the first skeleton reduction wave versus square root of potential scan rate was 4.4×10-6cm2·s-1in H3PO4-HAc-H3BO3(pH 2.16)buffer. AC impedance of Cr (Ⅲ) was a semicircle without Wahlberg line occurred at high frequency, which showed the anode oxidation process was controlled by heterogeneous charge transfer dynamics. The dynamic parameterkoof electrode process was calculated from the relationship between phase angle and frequency. AC impedance of PW11Cr keleton reduction revealed the electrode process was controlled by diffusion.  
        关键词：Keggin-type Cr-substituted heteropolytungstate;cyclic voltammetry;AC voltammetry;AC impedance   
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      • AI Yongping,ZHU Lijuan,LI Xiaoyan,ZENG Yingying,LIU Lijun,ZHOU Taiping
        Vol. 50, Issue 3, Pages: 74-78(2011)
        摘要：In order to reduce environmental pollution, a novel unsaturated poly ester-amide resin was prepared by the melt polycondensation reaction. The crosslinking and hydrolysis properties of crosslinked unsaturated polyester-amide were studied. The results showed that the unsaturated poly esteramide resin was crosslinked by different structures, and its mechanical and degradation properties were increased by the heat treatment. The unsaturated poly ester-amide resin is thus anticipated to be used as completely degradable polymer materials for environmental protection.  
        关键词：unsaturated poly ester-amide resin;heat treatment;mechanical strength;hydrolysis property   
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      • XIN Junliang,HUANG Baifei,YANG Zhongyi,YUAN Jiangang,MU Yangxiu
        Vol. 50, Issue 3, Pages: 79-84(2011)
        摘要：In order to reduce the risk of pollutants entering the human diet from soils via agricultural products, breeding of pollution-safe cultivars (PSCs), that is, the cultivars whose edible parts accumulate specific pollutant at a low enough level for safe consumption when grown in contaminated soil, has been investigated as a practical method of minimizing the concentrations of heavy metals in crops. In this study, a pot experiment is conducted to investigate the variations of Cd and Pb accumulation in different water spinach cultivars. The results show that: ① shoot biomasses of water spinach don't significantly decrease but increase both under Cd and Pb exposure compared with the controls. This indicates that water spinach has a certain degree of Cd and Pb tolerance, which will increase the health risk from water spinach contaminated by soil Cd and Pb. ② shoot Cd and Pb concentrations vary significantly among the tested cultivars under Cd or Pb exposure (P<0.01) and correlations of Cd and Pb concentrations of all the cultivars between the first and second harvests are significant atP<0.05 level and atP< 0.01 level, respectively. ③ The two cultivars, YQ and BGJ, are not only CdPSC but also PbPSC and may be considered as Cd+Pb-PSC. This implies that the characteristics of Cd and Pb accumulations in water spinach are governed by gene(s) and are able to be well reproduced. Therefore, the selection of Cd+PbPSC is feasible in Cd and Pbcontaminated soil.  
        关键词：water spinach;cadmium;lead;cultivar variation;pollution-safe cultivar (PSC)   
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      • Vol. 50, Issue 3, Pages: 85-89(2011)
        摘要：Spodoptera litura (Splt)and Spodoptera exigua (Se) are both extremely serious agricultural lepidopteran pests and belong to the same family (Noctuidae) and the same genera (Spodoptera). Spltnucleopolyhedrovirus (SpltNPV) and Se multiple nucleopolyhedrovirus (SeMNPV) are viral pathogens to the two insects, respectively. Comparative analysis of the complete genome sequences of SpltNPV and SeMNPV show two genomes are very similar. Although both the pathogens and the hosts are closely related, the mechanism of the two baculovirus not infecting the hosts each other is unclear. This study concentrate on investigating the reason of the Se301 cells bySpltNPV abortion infection. The replication of virus have completed in SpltNPVinfected Se301 cells by testing with dot blotting. The results of RT-PCR analysis displayed that all genes from very early genes to late genes have transcribed in the infected cells. Western blotting analysis revealed that it is no specific POLYHEDRIN with a size of 29 700 when using the POLYHEDRIN antiserum. Collectively, in the Se301 cells infected by SpltNPV, the replication of virus and the transcription of all late genes have happened, although it is not detected the expression of very late genes, suggesting that the blocking of SpltNPV proteins expression is the main limited factors in viral replication cycle.  
        关键词：SpltNPV;Se301 cell;protein expression   
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      • Vol. 50, Issue 3, Pages: 90-93(2011)
        摘要：Researches of prokaryotic genomes have led to the discovery of the correlation of genomic GC content with genome size and aerobics/anaerobics. In order to study the influence of lifestyle of prokaryotes on the correlation between genome size and genomic GC content, we analyzed the effect of optimal growth temperature, aerobics/anaerobics, motility, aquatics, and parasitism, using data from 411 representative prokaryotic species (including archaea and bacteria) and correlation/regression approaches. The results show that the correlation between genome size and genomic GC content is indeed influenced by these factors. Moreover, it was found that the correlation is the most significant in parasitic prokaryotes.  
        关键词：prokaryote;genome size;GC contents;lifestyle;correlation/regression analysis   
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      • YU Liping,LIANG Xiaoliang,ZENG Yongchang,LUO Jiabo
        Vol. 50, Issue 3, Pages: 94-97(2011)
        摘要：The thermal properties ofEphedrascum was studied by TG-DTG and DSC methods while the components ofEphedrascum are further detected by pyrolytic GC-MS method. ForEphedrascum, the main temperature range of mass loss was 250~560 ℃. The fastest rate of mass loss was shown at 305 ℃ and 506.3 ℃. Two endothermic peaks were quite obvious respectively at 364.8 ℃ and 508.2 ℃.Ephedrascum is organic compound. The thermal decomposition product at 450 ℃ was analyzed by pyrolytic GC-MS, and twenty-eight chemical compounds were detected.  
        关键词：Ephedrascum;TG-DTG-DSC;pyrolytic GC-MS   
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      • Vol. 50, Issue 3, Pages: 98-101(2011)
        摘要：HPLC fingerprint of Qutanzhike Granule was established with Elite Hypersil BDS column（4.6 mm×250 mm,5 μm）,methanol(A) and 0.15% acetic acid(B) as mobile phase.The elution profile was: 0~95 min 15% to 75% A in B(linear gradient). The column temperature was set at 25 ℃ and the flow rate was 1.0 mL/min. The detective wavelength was at 260 nm. 19 common peaks were selected as the fingerprint peaks from 12 batches of the production. In the established fingerprint, 10 flavonoids were identified by the HPLC-ESI/MS/MS based on MS spetra and standard reference. The method can be used for quality control of Qutanzhike Granule with great precision,accuracy and good reproducibility.  
        关键词：Qutanzhike Granule;HPLC;fingerprint   
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      • WEI Keqiang,YANG Junxian,WEI Zhizhong
        Vol. 50, Issue 3, Pages: 102-104(2011)
        摘要：This paper studied the content of rutin in the progenies of fluecured tobacco with introduced exogenous DNA ofPerilla frutescens(L.) Britt. The method of sexual hybridization combined with asexual graft was used to introduce exogenous DNA into tobacco, and the optimum environment of pollination was selected. HPLC was adopted to analyze the content of rutin in tobacco leaves. This method could significantly improve the success ratio of introducing exogenous DNA under the condition of lower temperature (22～25 ℃) and higher relative humidity (70 %～80 %). The results of the analysis showed that the content of rutin in the progenies increased by 70.4 % compared with that in female parent tobacco leaves and was 4～5 times higher than that in buds ofPerilla frutescensL. from main production area in China. The progenies of fluecured tobacco with introduced exogenous DNA could provide new materials for massextraction of rutin. This study also explored a new way for utilizing gene resources in medicinal plants.  
        关键词：Perilla frutescens(L.) Britt;tobacco;rutin   
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      • Vol. 50, Issue 3, Pages: 105-111(2011)
        摘要：Heavy mineral zircons were separated from diamondiferous lamproites and their associated rocks in Ningxiang and nearby area, Hunan province, and their main and trace element compositions, interior structure and the U-Pb isotopic ages were obtained with EPMA, cathodoluminescence microscope and LA-ICPMS measurement. The zircons in lamproites from different locations generally have similar geochemical characteristics. The U-Pb dating of zircons suggests that the lamproites were probably formed during multistages. A young age of (101.6±5.1)Ma was obtained on four zircon samples from No.1 and No.3 pipe lamproites The zircon collected from the Cretaceous red strata in Shangwutong area has a concordant207Pb/206Pb age of (2 008±29)Ma. These results cannot specifically determine the source rocks of diamond in the study area.  
          
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      • FAN Wenping,SHI Yishao,CHE Jianren,CHEN Huajie
        Vol. 50, Issue 3, Pages: 112-117(2011)
        摘要：Taking Shanghai as the empirical study area, this paper combines the topological analysis of space syntax and the quantitative analysis of GIS to explore the influence of urban street configuration on the location and the level of urban commercial centers. Topological configuration of urban streets has strong influence on the location of commercial centers. In commercial centers at different levels, there are one or more axial lines with high integration (red lines) pass through. The level of commercial centers is in direct proportion to the control value, the connect value and the integration value of axial lines in each area. The scatter diagram shows that the local spatial intelligibility of commercial centers at five levels is higher than that of the whole city, suggesting that the commercial centers are apt to be located in the 'intelligibility areas' which are easily to be perceived in the city.  
        关键词：commercial center;accessibility;space syntax;geographical information system   
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      • Vol. 50, Issue 3, Pages: 118-122(2011)
        摘要：Based on multi-service grid platform of land resource (LR-MGSP), a novel land utilization statistics method is presented. The statistics services are classified by grading processed compositions. Incremental statistics based on statistic base table is adopted for atomic services, and aggregate statistics based on the state of grid resource is adopted for composition services. The comparison test results show that this method is superior to traditional approach in statistic efficiency, especially for large statistic data. The prototype system can meet with the needs of efficient process of massive land data, and provide new scheme for interagency coordination processing other business of land resource management.  
        关键词：land utilization;service grid;statistics analysis   
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      • DING Zhangwei,WEN Zhiping,LI Weibiao,JIAN Maoqiu,YAN Zhaochao,LI Weiquan
        Vol. 50, Issue 3, Pages: 123-129(2011)
        摘要：The characteristics of grass surface heat flux under different weather conditions in autumn and in winter have been analyzed based on data measured with Eddy Covariance method at Longmen long-term observation station during the period of September 2009 to January 2010. The results indicate that there is a large monthly variation in the energy balance under different weather conditions. The daily variation shows a typical single-peak circle on clear days (except long-wave radiation) and a double-peak or more-peak curve on cloudy and rainy days. The value of upward long-wave radiance is slightly larger than that of downward long-wave radiance. The difference of values between these two kinds of radiance is the smallest on rainy days and increases on cloudy and clear days. The upward long-wave radiation, the downward long-wave radiation, the solar radiation, the net radiation and the upward shortwave radiation show the descending contribution to the radiation balance. Each component of surface energy flux shows obvious synoptic conditions and seasonal and monthly variations. The latent heat flux is larger in autumn than in winter, whereas the sensible heat flux is opposite. The latent heat flux and the sensible heat flux are both reduced on cloudy and rainy days. A negative watervapor transfer exists at night. The soil heat flux is negative on rainy days and the daily average value of rainy days is higher than that of clear and cloudy days. The soil temperature of surface and shallow-layer (5cm) presents accurate sine curve changes regardless of clear days and cloudy days. The soil temperature active layer is in the 10cm scope. The time when the soil temperature reaches the maximum (minimum) is delayed with increasing soil depth. There is no diurnal variation below 10cm depth. The soil temperature of surface and shallow-layer decreases with time on rainy days. The soil temperature of each layer is higher on clear days than that on cloudy days and higher in autumn than in winter.  
        关键词：Longmen;surface;radiation balance;energy balance;soil temperature   
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      • ZHAO Minghui,Huang Honghui,QI Zhanhui,CHEN Guizhu
        Vol. 50, Issue 3, Pages: 130-133(2011)
        摘要：The temporal and spatial heterogeneity of phytoplanktons in the Northern South China Sea (NSCS) and its relationship with marine environment were investigated based on the data acquired from the survey on fishery resources and their habitat environment in the South China Sea exclusive economic zone and continental shelf carried out from 1997-2002 (sponsored by the state program of special marine survey, HY126-02). The data were analyzed by using GIS spatial analysis model and mapping techniques. The amount of phytoplanktons in NSCS changed from 0.03 to 4179×104ind/m3with an average of 87.2×104ind/m3in desceding order of summer, winter, spring and autumn. The phytoplankton density was generally higher in the coast waters than in offshore waters. Areas with high phytoplankton density patched along the coastal waters. The high density patches generally occured in the upwelling areas along NSCS coast, such as the northern and central Beibu Bay, Zhelang, Taiwan Bank and Dianbai-yangjiang area. Patches with high phytoplankton density usually shifted from east to west with seasonal changes of monsoon wind and coast currents.  
        关键词：landscape ecology;northern South China Sea;phytoplankton;temporal and spatial heterogeneity   
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      • Vol. 50, Issue 3, Pages: 134-140(2011)
        摘要：In this paper, a study was carried out to calculate the diffuse attenuation coefficient of suspended sediment by using the ASD F3. The experiment is based on measuring the radiance of an artificial light source penetrating through the water with different concentrations of suspended sediment in different water depths. Compared with pure water, the diffuse attenuation coefficients of suspended sediment with similar grain sizes were calculated for different concentrations with wavelength from 350 to 920 nm. The results show that the spectral characteristics of the diffuse attenuation coefficient of suspended sediment are simplex, and it decreases as the wavelength increases. Furthermore, it shows a positive correlation between the diffuse attenuation coefficients and the concentrations of suspended sediment, with the exception of the water depth from 0~0.15 m, where the diffuse attenuation coefficients of suspended sediment are almost invariant. The diffuse attenuation coefficient of per unit concentration of suspended sediment used in the experiment gradually decreases from 0.084 to 0.069 m2/g with wavelength from 350 to 920 nm.  
        关键词：suspended sediment;diffuse attenuation coefficient;ASD Spectrometer;remote sensing of water quality   
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      • Vol. 50, Issue 3, Pages: 141-143(2011)
        摘要：The chemical structure of α-dimethylbenzylphenolpolyethoxylate ether was characterized by using various organic spectroscopy technologies, including FTIR, UV, ESIMS and NMR analyses.  
        关键词：FTIR;UV;ESIMS;NMR;α-dimethylbenzylphenolpolyethoxylate ether;Structral identification   
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      • WEN Weigeng,LIN Heizhao,WU Kaichang,YANG Qibin,HUANG Jianhua,JIANG Shigui
        Vol. 50, Issue 3, Pages: 144-146(2011)
        摘要：The astaxanthin was added to the feed of black tiger shrimpPenaeus monodon(initial body weight(1.32±0.03) g)with different levels (0, 10, 20, 40, 80 and 160 mg·kg-1)for 30 days, which aim to determine the effects of astaxanthin on growth, survival and immunological parameters. The results show that astaxanthin increased the survival rate ,but did not get regularization;weight gain rate and the specific growth rate(SGR), which were significantly higher in the experimental groups than the control one(P<0.05); on the final body weight gain, were significantly difference in the experimental groups than the control (P<0.05), but not significantly difference between the experimental groups(P>0.05)；astaxanthin significantly increased the activity of phenoloxidase (PO) in the shrimp serum(P<0.05) except for 10 and 20 mg·kg-1 groups , but did not significantly influence the activity of peroxidase (POD), Superoxide dismutase(SOD) and alkaline phosphatas（ALP）in the shrimp serum. Based on weight gain rate, specific growth rate (SGR)and phenoloxidase (PO) capability, supplement of astaxanthin may be 40～80 mg·kg-1.  
        关键词：astaxanthin;Penaeus monodon;survival;specific growth rate(SGR);immunological parameter   
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