最新刊期
      卷 50 ， 期 1 ， 2011
      • Vol. 50, Issue 1, Pages: 1-3(2011)
        摘要：It is important to obtain the singularity expansions of the solutions of the integral equations, which reflect the physical characteristic of the equations and allow us to have approximate solutions with physical significance. The singularity expansions of the solutions of the weakly singular modified Hammerstein equations with logarithm kernel are obtained.  
        关键词：Hammerstein equations;nonlinear integral equations;singularity expansions   
        1295
        |
        144
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43611140 false
        发布时间：2023-12-11
      • WANG Jinhua,ZHAO Yulin,XIANG Hongjun
        Vol. 50, Issue 1, Pages: 4-8(2011)
        摘要：Using fixedpoint theorems, sufficient conditions for the existence and uniqueness for mpoint boundary value problem of fractional differential equations are established. Moreover, examples are given to show the effectiveness of our works.  
        关键词：fractional differential equation;boundary value problem;fixedpoint theorem   
        1365
        |
        124
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43611654 false
        发布时间：2023-12-11
      • YAN Lewei,CHEN Shuhui
        Vol. 50, Issue 1, Pages: 9-13(2011)
        摘要：Some methods such as population isolation mechanism, optimum reserved strategy, arithmetic crossover, adaptive random mutation and heterogeneous strategy are used to improve genetic algorithm. Besides the advantage that the optimal solution can be found only by the value of objective function, the local searching capability is enhanced in this improve genetic algorithm. This algorithm is applied to solve nonlinear equations. Numerical examples demonstrated that this algorithm can solve the optimization problem which has nonlinear equality constraint. Furthermore, the heterogeneous strategy speeds up the process of convergence and raises the convergence probability of global optimal solution.  
        关键词：Nonlinear equations;genetic algorithm;heterogeneous strategy;adaptive random mutation   
        1544
        |
        147
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43613745 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 14-17(2011)
        摘要：The problem of decentralized static output feedback control for a nonlinear interconnected system which is composed by a number of TakagiSugeno (TS) fuzzy bilinear subsystems with interconnections is presented. Based on the Lyapunov criterion, some sufficient stabilization conditions are derived for the whole closeloop fuzzy interconnected systems. The stabilization conditions are further formulated into linear matrix inequalities (LMI) so that the corresponding decentralized controllers can be easily obtained by using the Matlab LMI toolbox. Finally, a simulation example shows that the approach is effective.  
        关键词：nonlinear interconnected system;fuzzy bilinear model;decentralized control;static output feedback control;linear matrix inequality (LMI)   
        1453
        |
        147
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43610866 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 18-22(2011)
        摘要：To make the agents negotiate more efficiently in bilateral multi-issue negotiation in multi-agent based competitive e-commerce, an agent negotiation model in competitive environment is presented, and the Improved Genetic Algorithm (IGA) is applied in the model to enhance the negotiation efficiency. After 1000 times of experiments for the four kinds of agents in the same condition, the Standard Genetic Algorithm (SGA) averagely needs negotiation of 360 runs, Genetic Algorithm based on Metropolis rule (MGA) averagely needs 230 runs, Adaptive Genetic Algorithm AGA averagely needs 207 runs, while the IGA averagely needs only 151 runs. The experiment results show that the IGA can gain the optimal negotiation result more efficiently than other three kinds of genetic algorithms in competitive bilateral multi-issue negotiation.  
        关键词：E-commerce;bilateral multi-issue negotiation;improved genetic algorithm   
        1390
        |
        134
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43612284 false
        发布时间：2023-12-11
      • CHENG Huidong
        Vol. 50, Issue 1, Pages: 23-26(2011)
        摘要：Predatorprey model of a stage structured impulse delay HollingII functional response, in which predator（natural enemy ）is released impulsively and the prey has stage structured and maturation time delay are discussed, and a systematic mathematical and ecological study are performed. Using the discrete dynamical system determined by the stroboscopic map, we obtain the existence of pesteradication periodic solution. And show that the pesteradication periodic solution is unique and globally attractive by using the basis of impulse and delay differential equation. Further, we prove that if the pulse releasing rate or impulsive period for natural enemy is within an appropriate range, the pest population can be controlled under the economic injury level(EIL)E, that is, the pest population and the natural enemy population may coexist. The results provide reliable tactical basis for the practical pest management.  
        关键词：impulse;stage structured predatorprey model;time delays;global attractivity;pest management   
        1214
        |
        153
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43613614 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 27-30(2011)
        摘要：Using the theory and method of distance geometry, the problems about geometric inequalities for the edgelengths and volumes of two n dimensional simplexes in the Euclidean space E-n are studied. Two geometric inequalities for the edgelengths and volumes of two n dimensional simplexes are established,and the n dimensional Pedoe inequality and PengChang inequality are improved.  
          
        1234
        |
        128
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43613391 false
        发布时间：2023-12-11
      • WU Huiling,LI Zhongfei 
        Vol. 50, Issue 1, Pages: 31-33(2011)
        摘要：A continuoustime meanvariance portfolio selection model when stock prices follow geometric Levy processes is investigated. The primal parameters, such as the interest rate of riskless asset and the Levy measure, depend on the market states modulated by a continuoustime Markov chain. The existence of optimal solutions is analyzed, and the optimal strategy and the efficient frontier of the model in closedform are derived by dynamic programming.   
        关键词：regime switching;geometric Levy process;meanvariance model;efficient frontier   
        1289
        |
        138
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43611980 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 34-38(2011)
        摘要：Bifurcation phase portraits of traveling wave solution for KadomtsevPetrishvili equation with nonlinear dispersive terms are given by using bifurcation theory of dynamical systems. Parametric representations of breaking traveling wave solutions of KadomtsevPetrishvili equation with nonlinear dispersive terms are obtained.  
          
        1350
        |
        142
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43612327 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 39-43(2011)
        摘要：The research focus on the optimization of components capacity of “WindPhotovoltaic” hybrid system under the premise of reliable power supply. A Graphbased “MaxMin” Ant System algorithm (GBMMAS) has been proposed to optimize levelized cost of energy (LCE) of system under the premise of certain loss power supply probability (LPSP), and finally figured out system components capacity corresponding to minimized LCE. The simulation and operation results show that the optimization algorithm proposed is effective, the optimization results is reasonable and feasible.  
        关键词：“WindPhotovoltaic” hybrid system;GBMMAS;loss power supply probability;levelized cost of energy   
        1413
        |
        123
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43610953 false
        发布时间：2023-12-11
      • LIU Zhongtu,WU Qinglong,ZONG Zhijian
        Vol. 50, Issue 1, Pages: 44-48(2011)
        摘要：The evaluation of EV energy consumption economy is emphasized because of energy and environmental issues. The work studies the energy consumption economy based on the method of test bench simulation, which included a dynamometer and related software. Taking the ECUV vehicle as an object, hundred kilometer energy consumption is tested in different vehicle speeds and driving cycles.Energy consumption economic characteristic curve is depicted in figure and drving range is calculated. Vehicle mass influence on the energy consumption economy is analyzed through testing the EVs hundred kilometer energy consumption. The result is used to improve the ECUV vehicle energy consumption performance and increase the driving range,and also provides the references for the development of other EVs.  
        关键词：electric vehicle(EV);energy consumption economy;test bench simulation;driving range;driving cycle   
        1397
        |
        172
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43613947 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 49-52(2011)
        摘要：The ground states of PuO3 under different electric fields ranging from 0.005 to 0.005 a.u. have been optimized using density functional theory DFT/B3LYP with RECP for Pu and 6-311+G* for O. The excitation energies and oscillator strengths have been calculated under the same electric fields employing the time-dependent DFT method. The results show that the electronic state and excitation energy are strongly dependent on the field strength of applied electric field. The total energy of the ground state decreases linearly with the applied field strength. The dependence of the calculated excitation energies on the applied electric field strength is fitting well to the relationship proposed by Grozema. The excitation energies of the first five excited states of PuO3 decrease as the applied electric field increases because the energy gap between the HOMO and LUMO become close with the field, which shows that the molecule is easy to be excited under electric field and hence can be easily dissociated. The spectra of the first five-excited-electron of PuO3 are in the region of far infrared. The wavelength is in 900.2～2063.3 nm  
        关键词：PuO3;excited state;dipole electric field;Time-Dependent DFT   
        1230
        |
        131
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43612714 false
        发布时间：2023-12-11
      • XIONG Shenghua,ZHOU Cuiying
        Vol. 50, Issue 1, Pages: 53-57(2011)
        摘要：As chaotic time series are large, least squares support vector machines(LSSVM) have disadvantages of bigger memory spending and slower training speed on prediction. According to data characteristic of large chaotic time series, it adopts ideas of data sets partition and data correlation coefficient to propose a LSSVM prediction model for large chaotic time series based on new reduction strategy. The model partitions large chaotic time series is split up into several different subsets based on the mean cycle of chaotic time series.Some nonsupport vectors from all subsets is reduced except the end based on the values of Lagrange multipliers.The reduced data sets combines with the end subset based on the correlation coefficients,and is used to regress and predict by LSSVM method. The proposed model is applied to the forecast of large chaotic time series on correlative experiments,and the results show it hardly loses prediction precision and takes quicker training speed.  
        关键词：chaotic time series;least squares support vector machines;reduction strategy;correlation coefficient;data sets partition   
        1455
        |
        147
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43614077 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 58-63(2011)
        摘要：The output current tracking control for inverter is crucial for gridconnected photovoltaic power conditioning (PVPC) system. Firstly, the work builds the threephase PVPC model and analyzes its dynamic structure, introduces the feedforward compensation strategy for grid voltage disturbance. The current closedloop system is simplified to analyze the PI control correction technology. A zero steadystate error traking technology is presented for inverter output currents to make the system output current track the gridconnected order current in real time, eliminating the effect of grid voltage disturbance. Finally, simulation and prototype experiment results validate that the control strategy is reasonable, reliable and practical.  
        关键词：gridconnected photovoltaic;current closeloop;zero steadystate error tracking   
        1531
        |
        162
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43610559 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 64-69(2011)
        摘要：The influence of undercrossing shield tunneling and its interaction with surrounding environment is one of the hot issues in the underground engineering field. The urban tunnel construction will cause the deformation or even damage of the nearby buildings. With the construction of undercrossing tunnels, more and more undercrossing tunnels are adjacent buildings. It is a crucial problem to ensure the safety for stabilizing the superstructure and undercrossing tunnels. By means of 3D-FEM, the undercrossing shield tunneling construction of adjacent structures is simulated and studied. The results show that the influence of adjacent structure on the undercrossing shield tunneling construction cannot be neglected, and the influence scope can be expressed by L/D, which L is defined as level distance from the new tunnel axis to building axis and D is defined as outer diameter of tunnel. When L/D =0 to 2, undercrossing shield tunnel construction has great influence on building, especially, the building is in danger when L/D =1.5. When L/D=0 to 3, the value of the existing tunnel deformation and the new tunnel lining force increases obviously. Out of the region, the influence on the buildings is ignored.  
        关键词：undercrossing tunnel;shield tunneling;structure;numerical simulation;settlement   
        1446
        |
        141
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43613686 false
        发布时间：2023-12-11
      • ZHANG Cuixian,LIN Chaozhan,YANG Jinyan,XIONG Tianqin,DENG Jiewei,WEI Yulong,ZHAO Zhongxiang,ZHU Chenchen
        Vol. 50, Issue 1, Pages: 70-74(2011)
        摘要：Traditional chinese medicine of Ilex pubescens (Mao-Dong-Qing) is commonly used to treat the cardiovascular diseases in South China. The preliminary bioassays showed that the total saponins isolated from Ilex pubescens exhibited significant potent degrading the plasma viscosity in rats. Meanwhile, our recent works indicated that the n-BuOH soluble fractions of ethanol extract (70%) from the root of the same species obviously inhibited the contraction (60 μg/mL) of rabbit thoracic aorta induced by norpinephrine in vitro. As a continuation of bioactive constituent from the n-BuOH of Ilex pubescens, five triterpene saponins were isolated. Their structures were elucidated by chemical, physical methods and spectroscopic analysis methods. As a result, they were identified as mussaendoside R (1), ziyu-glycoide I (2), Lucyoside H (3), ilexoside A (4), ilexoside O (5), excepescially. Compounds 1, 2 and 3 were firstly obtained from Ilex pubescens.  
        关键词：Ilex pubescens;triterpene saponins;structure   
        1521
        |
        139
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43613906 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 75-78(2011)
        摘要：The glass transition (Tg), β relaxation and dynamic mechanical properties of PC/PS/ nanoCaCO3 and PC/PS/encapsulated nanoCaCO3 composites before and after physical aging were characterized by DSC and DMA analysis, in order to study the effect of nanofillers on the segment relaxation movement of PS. The results showed that the nanoCaCO3 accelerated the segment relaxation of PS due to the weak interaction between the matrix and the nanoparticles, the Tg, loss modulus peak temperature and β relaxation temperature of PS phase decrease. On the contrary, encapsulated nanoCaCO3 preferred to improve the interface interaction and thus increased the Tg temperature, the loss modulus peak temperature,β relaxation temperature and storage modulus of PC/PS/encapsulated nanoCaCO3 composites compared with PC/PS/nanoCaCO3 composites. The Tg and enthalpy loss of PC/PS, PC/PS/nano CaCO3 and PC/PS/encapsulated nanoCaCO3 composites all increased with the time of physical aging, but the increment was fewer for PC/PS/encapsulated nanoCaCO3 composites. Physical aging induced different enhancement in the storage modulus of PC/PS/nanoCaCO3 composite.  
          
        1260
        |
        125
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43611914 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 79-84(2011)
        摘要：In the present study, the reaction of ciprofloxacin with free available chlorine was investigated. The reaction products were concentrated and isolated by solid phase column and analyzed by Mass Spectrometry and NMR. Five products were identified，in which monochloro and dichloroquinolones were the major compounds. Mass fragment pathways of identified products were also elucidated. Chlorination reaction center concentrated on the position C3 and C8 of the quinolone ring. Besides of chlorination, the piperazine ring on the position C7 of the quinolone ring was broken to form amine. The side chain alkylamine was further dealkylation and hydroxylation.  
        关键词：ciprofloxacin;chlorination product;mass spectrometry;structure analysis   
        1364
        |
        117
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43612646 false
        发布时间：2023-12-11
      • GAO Hongtao,LIU Yuanyuan
        Vol. 50, Issue 1, Pages: 85-88(2011)
        摘要：The La-CdS/TiO2 photocatalysts were prepared using hydrothermal method by metal doping coupled with semiconductor composite method. The products were characterized by SEM, XRD and UVvisible DRS, respectively. The photocatalytic performances of samples were studied on the degradation of methyl orange (MO). It was found that the absorption of La-CdS/TiO2 enhanced significantly, both in ultraviolet and visible light region. And the absorption edge was 452 nm, which shifted to the low energies (visible light region). Compared to bare TiO2, La doping reduced combination rates of the electronhole pairs and the coupled of CdS improved the response of TiO2 to visible light, which resulted in the optical response enhancement. After being irradiated for 15 minutes, the degradation rate on MO for the La-CdS/TiO2 catalyst almost reached 99%.  
        关键词：La3+ doping;CdS;TiO2;photocatalytic activity   
        1527
        |
        121
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43615169 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 89-91(2011)
        摘要：Two ecological niche models, GARP and MAXENT, were used to simulate the ecological conditions of the olive fruit fly, Bactrocera oleae. Suitability analysis and Geographic Information System (GIS) were applied to simulate potential distribution areas of the olive fruit fly in China. The GARP results showed that the most areas of southern China are the suitable areas of olive fruit fly. MAXENT model showed that the provinces in southwest China,Yunnan, Guizhou, Sichuan and Guangxi are suitable distribution areas of the olive fruit fly. Comprehensive analysis indicated that Yunnan, Sichuan and Guizhou are the most suitable distribution areas of the olive fruit fly.  
        关键词：olive fruit fly;GARP;MAXENT;ecological niche model;suitability analysis;China   
        1585
        |
        146
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43614218 false
        发布时间：2023-12-11
      • PING Hailin,WU Jinying,XU Shengwei,HU Kaishun,DUAN Zhigang
        Vol. 50, Issue 1, Pages: 92-98(2011)
        摘要：Transforming growth factorβ1 (TGFβ1) is a highly conserved pleiotropic cytokine. In this study, we presented the bioinformatics analysis of TGFβ1 fulllength cDNA sequences from orangespotted grouper (Epinephelus coioides). The full length cDNA is 2477 bp, which contains an ORF of 1161 bp, encoding a 386 amino acids protein. Realtime PCR results showed that TGFβ1 mRNA was predominantly expressed in the kidney, followed by head kidney and spleen of the healthy orangespotted grouper. The expression of TGFβ1 in isolated headkidney lymphocytes was upregulated treated with PolyI:C or ConA, and peaked at 4 hours after stimulation. Lymphocytes groups which were treated with PolyI:C had little TGFβ1 expression after 16 and 24 hours, while the expression of TGFβ1 was significantly higher than the control groups during the whole experimental processing time treated with ConA. In conclusion, we found the structure and expression pattern of grouper TGFβ1 was similar to those of other fish.  
        关键词：TGFβ1;Epinephelus coioides;cloning;expression   
        1399
        |
        126
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43612496 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 99-103(2011)
        摘要：Uncoupling protein 3 (UCP3) and heart fatty acidbinding protein (HFABP) are pivotal in the regulation of fat metabolism in skeletal muscle cells. Taking binary crossbreed pig of Large White pig and Landrace as control, the expression and localization of UCP3 and HFABP genes and proteins are detected in the skeletal muscle cells by reverse transcription polymerase chain reaction (RTPCR) and histological and immunohistochemistry methods. The results show that both of UCP3 and HFABP are detected in the cytoplasm of muscle cells from Nuogu pig and crossbreed pig. Compared with crossbreed pig, however, the expressions of UCP3 and HFABP in Nuogu pig breed are significantly lower based on the scan results of mean optical density (mOD) of positive pellets in the muscle cells. And the content of serum free fatty acids and intramuscular fat (IMF) of skeletal muscle are much higher in Nuogu pig breeds together with larger muscle cells and intracellular spaces. It sounds that the absorption of fatty acids from blood is less because of the lower HFABP in muscle cells of Nuogu pig. And the production of adenosine triphosphate (ATP) is much more effective in Nuogu pig due to the lower expression of UCP3, which seems to be compensation to the less intake of fatty acids for energy supply in muscle cells of Nuogu pig. As a result, the excessive fatty acids would turn to synthesize triglyceride deposited in fat cells inside of muscle and fat tissue, which results in higher intramuscular fat (IMF) and backfat in Nuogu pig breed. It suggests that both of UCP3 and HFABP genes and the expression in the muscle cells are contributed to the meat quality and backfat traits in Nuogu pig breed.  
        关键词：UCP3;HFABP;immunohistochemistry;skeletal muscle;Nuogu pig   
        1188
        |
        129
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43612171 false
        发布时间：2023-12-11
      • ZHU Daoli,SONG Xushu,XU Dagang
        Vol. 50, Issue 1, Pages: 104-109(2011)
        摘要：In order to investigate the relation of muscle fiber MyHCs change and evoked potential of each subvolume of the lateral gastrocnemius muscle in rabbits at different postnatal ages，Each subvolume of lateral gastrocnemius muscle in rabbits at postnatal ages were examined by applying the clectronic stimulation instrument and sodium dodecyl sulphatepolyacrylamide gel eletrophoresis（SDSPAGE）.The results indicated that only the intermediate subvolume's peak voltage was basically uniform，but the lateral subvolume and the medial subvolume were separately some change. At the same time，it could be seen that grown rabbit's duration was longer than infancy in spite of which subvolume. This was greatly related with the component proportion of fiber types of each subvolume. And eletrophoresis bands of myosin heavy chain isoforms（MyHCs）of each subvolume of the lateral gastrocnemius muscle in rabbits showed respectively MyHCsⅡa，MyHCsⅡd（Ⅱx），MyHCsⅡb and MyHCs I. They corresponded to the muscle fiber phenotype typeⅡA（FOG），ⅡX（FO），ⅡB （FG）and I（SO）fiber.So,the relation between difference of function，the composition of muscle fiber MyHCs and phenotype were approached during postnatal development.  
        关键词：lateral gastrocnemius muscle;muscle subvolume;evoked potential;myosin heavy chain isoform;actomyosin adenosine triphosphatase;rabbit   
        1376
        |
        116
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43612367 false
        发布时间：2023-12-11
      • XIA Liqun,ZHANG Honglian,LIANG Haiying,QIN Qiwei
        Vol. 50, Issue 1, Pages: 110-114(2011)
        摘要：Singapore grouper iridovirus (SGIV) is a major pathogen resulting in heavy economic losses to grouper aquaculture. In this study, recombant eukaryotic vector pEGFPICP18 which inserted with SGIV ICP18 gene was transfected into Fathead minnow (FHM) cells, and ICP18GFP fusion protein was successfully expressed in FHM cells with a finely punctate cytoplasmic pattern. Candidate siRNA targeting SGIV ICP18 gene (siRNAICP18) was designed and chemically synthesized．To investigate the inhibition effect of siRNAICP18, pEGFPICP18 and siRNA were cotransfected into FHM cells, and the green fluorescence was observed by fluorescence microscope after transfection. The green fluorescence in FHM cells cotransfected with pEGFPICP18 and siRNAICP18 were 60%~80% fewer than that of negative control, which show the siRNAICP18 can effectively silence the extrinsic SGIV ICP18 gene in FHM cells during 24~48 h after transfection.  
        关键词：RNA interference;green fluorescent protein;singapore grouper iridovirus (SGIV);ICP18   
        1285
        |
        143
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43613487 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 115-118(2011)
        摘要：In this paper, the HPLC fingerprint of Kouyanqing Granule was established with Dikma PLATISIL ODS (250 mm×4.6 mm, 5 μm) column, acetonitrile and 0.1% (φ) formic acid as mobile phase, and the detection wavelength was 254 nm. 23 common peaks were selected as the fingerprint peaks. Seven of these common peaks were identified as chlorogenic acid, caffeic acid, luteolin-7-O-glucoside, harpagoside, cinnamic acid, ammonium glycyrrhetate and glycyrrhizic acid. The method established is selective, simple and reproducible, which can be used for the quality control of Kouyanqing Granule.  
        关键词：Kouyanqing Granule;HPLC;fingerprint   
        1337
        |
        120
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43610683 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 119-122(2011)
        摘要：An econometrical model is proposed to analyze the relationship between protected area and economic and population growth in China. The results show that the relationship meets the hypothesis of the Environmental Kuznets Curve (EKC). The transition period is when GDP per capita is located between 25 000 and 32 000 RMB. Five regions, Beijing, Tianjin, Shanghai, Zhejiang Province and Jiansu Province have gone beyond the transition period. Guangdong, Shangdong, Liaoning, Inner Mongolia and Fujian are within the transition period. The areas of their natural conservation areas Gansu, Sichuan, Qinghai and Jilin Provinces are substantial whereas natural conservation areas in Hainan and Guizhou are relatively small although they all have not entered into the transition period.  
        关键词：Environment Kuznets Curve;protected area;economic development;environmental protection   
        1480
        |
        122
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43612400 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 123-128(2011)
        摘要：In plain river network, joint nodes can not be ignored for exchange of water flow and pollutants from different watercourses. Response relation between outlet sections and inlet sections is an important technical parameter for water quality simulation. Aiming at the response relation research of crossed joint nodes with two inlet sections and two outlet sections, this paper builds 2-D hydraulic and water quality mathematical models and validates them by physical models. The results show that pollutant concentration differs greatly for different outlet sections. Based on the work above, a new expression of response relation and calculating equations of response coefficients are put forward. By comparing the response coefficients with those inferred from even mixing hypothesis mainly used in threestep method, obvious errors caused by even mixing hypothesis are disclosed.This study helps to improve the simulation method of plain river network water quality.  
        关键词：plain river network;crossed joint nodes;pollutant concentration;response relation   
        1224
        |
        153
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43610613 false
        发布时间：2023-12-11
      • LI Chu an,ZOU Heping
        Vol. 50, Issue 1, Pages: 129-132(2011)
        摘要：The Nanxiong fault zone is a large-scale extension detachment structure. According to the results of Ar-Ar laser stepheating dating of the syntectonic muscovite separated from a mylonite sample in the Nanxiong fault zone, combining with the field surveying and microstructure analysis,the initial extension of the Nanxiong fault zone occurred at 117.3±2.7 Ma in Early Cretaceous.The strong extension and ductile shearing of the fault zone took place at the end of the Early Cretaceous or the beginning of the Late Cretaceous with an Ar-Ar plateau age of 94.6±0.4 Ma. Two obvious latestage thermal perturbations are revealed with the Ar-Ar ages of 88.9±1.0 Ma and 81.1±2.0 Ma. The Ar-Ar chronology data of the Nanxiong fault zone provide a new geochronological constraint on the Cretaceous lithospheric extension in South China.The transition stage from the Early Cretaceous to the Late Cretaceous is an important epoch of the lithospheric extension in the study.  
        关键词：Nanxiong Fault;extension detachment structure;mylonite;ArAr chronology   
        1212
        |
        135
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43613881 false
        发布时间：2023-12-11
      • Vol. 50, Issue 1, Pages: 133-137(2011)
        摘要：The common geochemical data usually show a normal distribution while the abnormal data exhibit a fractal distribution and local singularity. Three typical interpolation methods, IDW, Kriging and fractal, were discussed in this study.The conclusions are as follows: three methods have almost the same effect on the data with normal distribution; fractal interpolation is better than IDW and Kriging for the data with singularity. This study can help to choose interpolation method.  
        关键词：fractal interpolation;inverse distance weighted;kriging;singularity   
        1422
        |
        204
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43613804 false
        发布时间：2023-12-11
      • CHEN Meiying,LIU Yihua,DONG Yuxiang,ZHENG Rongbao
        Vol. 50, Issue 1, Pages: 138-142(2011)
        摘要：Adjustment of land-use structure is essential to land-use planning, which is of great importance to promote intensive, efficient and sustainable utilization of urban land resources. Using the Gradual Easy Constraint Method(GECM),a multi-objective programming model was built and solved with the interactive adjustment method. This model aims at social, economic and ecological benefits, in which land area, land-use structure, macro programs, resources and technical are set as GECM constraints. The results show that the level of land in 2008 almost reach the rational demand in 2020. This can provide some useful information for decisionmakers.  
        关键词：land use;multiobjective planning;gradual easy constraint method;Huadu district   
        1277
        |
        128
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 43613062 false
        发布时间：2023-12-11
      0