最新刊期
      卷 52 ， 期 2 ， 2013
      • TIAN Guanfeng,TANG Liansheng
        Vol. 52, Issue 2, Pages: 1-7(2013)
        摘要：Firstly, the 6-parameter common finite layer method is proposed based on the basic principle of conventional method. The displacement mode of a layer element is taken in the product form of five complete polynomial and double series. By applying the static equilibrium equations of elastic medium to the layer element, the correlation rules among three-dimensional displacement polynomial coefficients are discovered. Thus six unknown and independent displacement parameters can be obtained, whose number is the same as nodal surface displacement with the result that completeness requirement for the displacement mode can be ensured. Secondly, the 6-paramter super finite layer method has been deduced by transforming operational matrix between the super finite layer element and its interior small elements, in which the coordination of higher order deformations between adjacent small layer elements can be satisfied. At last, it is concluded that the 6parameter common finite layer method is suitable for thin layered ground, while the super finite layer method is for layered ground with various thickness.  
        关键词：super finite layer method;6-parameter common finite layer method;completeness requirement of displacement mode;coordination of higher order deformation   
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        发布时间：2023-12-11
      • ZHANG Defeng,MA Zilong
        Vol. 52, Issue 2, Pages: 8-13(2013)
        摘要：Aiming at the imporvement of dynamic fuzzy neural network, a new algorithm is put forward, which combines the pruning strategy using column pivot SVD-QR method with the parameters adjustment. The pruning strategy with column pivot SVD-QR method is used to extract the most important fuzzy rules from a given rule base, which prevents the network structure from sustainable growth, and avoids the overfitting and over-training phenomenon. Extended Calman filtering method is utilized to divide the global algorithm into linear and nonlinear parts. The linear parameters and nonlinear ones can be updated respectively, thus the fast learning speed is achievable. The validity of the proposed algorithm is verified through the control of blood pressure. The results prove that the D-FNN with the pruning strategy using the column pivot SVD-QR method and the parameters adjustment has a good performance.  
        关键词：dynamic fuzzy neural network (D-FNN);pruning strategy;parameter adjustment;blood pressure control   
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        发布时间：2023-12-11
      • LU Longzhao,LI Cheng,YU Xiangyang
        Vol. 52, Issue 2, Pages: 14-18(2013)
        摘要：Important applications in optical information storage and processing based on photon echo have been developed.An accurate and effective numerical method to solve the Maxwell-Bloch equations that are used to describe the optical pulse propagation and interaction with inhomogeneously broadened two-level medium will be introduced. Two-pulse photon echo is calculated then photon echo and multiple-pulse photon echoes are stimulated in optical thin (thick) media by using the method, and the physical properties of those echoes are analyzed. The results show that the approach to storage and retrieval of light using multiple-pulse photon echoes based on stimulated photon echo is an effective mode.  
        关键词：two-level system;inhomogeneously broadened medium;Maxwell-Bloch equations;photon echo   
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        发布时间：2023-12-11
      • QU Guodong,LOU Zhanghua,WANG Lei
        Vol. 52, Issue 2, Pages: 19-22(2013)
        摘要：Optimal allocation of water is an effective way to resolve the issue of regional water shortages, while identification of economic efficiency coefficient of the regional water is the basis. Use relational analysis method in gray system theory, the various factors that affect water use economic benefits based on regional historical water use data is analyzed, and the main impact factors is distinguished. Mining the relationship between impact factors and total economic output combined with Lasso regression, and the method is used to solve water use economic efficiency coefficient of industrial water and agricultural water in Zhoukou City. The result shows that the method can calculate the water use economic efficiency coefficient of study area more accurately, and provide a more accurate and quantitative methods in fixing the economic efficiency coefficient of optimal allocation of water.  
        关键词：gray relational analysis;Lasso regression;economic efficiency coefficient;Zhoukou City   
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        发布时间：2023-12-11
      • CAI Longfei,ZHAO Huimin
        Vol. 52, Issue 2, Pages: 23-27(2013)
        摘要：Utilizing Bandelet transform to achieve adaptively features extraction of the digital image, the method can improve performances of protecting and recovering image features by multilevel data modulation & embedding of watermarking information, and choose information needed using detection technology at receiver. Experimentation results shows the proposed method can enhance recover performances of the digital watermark image and resistance to attacks.  
        关键词：data modulation;information hiding;Bandelet;digital watermarking   
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        发布时间：2023-12-11
      • XIAO Xize,ZHANG Yafang,LIU Hao,WU Qinghua
        Vol. 52, Issue 2, Pages: 28-32(2013)
        摘要：The affects of inclination of soil nails on the deformation and stability of excavation has been studied by designing and setting a laboratory model. A self-developed codes named 3D visualized monitoring system (3DVMS) has been adopted for comparing and verifying. The result indicated that the deformation and stability performance of excavation sidewall varies due to different inclination of soil nails. In conclusion, the soil nailing supports the sidewall best when the soil nails are inclined 30 degrees to the horizontal.  
        关键词：deformation of excavation;stability of excavation;real-time monitoring;inclination of soil nail   
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        发布时间：2023-12-11
      • YANG Wenguang
        Vol. 52, Issue 2, Pages: 33-37(2013)
        摘要：In order to determine the feed-forward neural network-s structure, fuzzy feed-forward neural network was constructed based on the sampling data, which reflected the system-s information contained in the construction data. And the hidden layer neuron activation function is the product of triangular membership function and corresponding data output. For this model, the network-s structure can be adjusted with the change of sampling data for designer, and the best weight was received based on weights-direct-determination. Numerical simulation results show that the fuzzy feed-forward neural network has many advantages such as high approximation precision,and the structure can be adjusted with good prediction and high real-time. It is better than the other feed-forward neural networks.  
        关键词：fuzzy feed-forward neural network;weights-direct-determination;triangular membership function;real-time   
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        发布时间：2023-12-11
      • ZHOU Jianrong,QIN Yuehai,LIU Saiyu,CHEN Jian
        Vol. 52, Issue 2, Pages: 38-42(2013)
        摘要：The approach to analysis of coefficients is used to analyze the asymptotic distribution of zeros of a certain class of generalized hypergeometric polynomials:q + 1Fq［-n,n + a12q-1qn + b1 ,n + b2 ,…,n + bq-1 ,-n + bqz ］Owing to the EnestromKakeya Theorem, some sufficient conditions about clustering of zeros on certain curves along different directions are obtained.  
        关键词：zeros;generalized hypergeometric polynomials;asymptotic distribution of zeros   
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        发布时间：2023-12-11
      • QIU Hua,YAO Zheng-an
        Vol. 52, Issue 2, Pages: 43-46(2013)
        摘要：The three-dimensional generalized Boussinesq equations with the incompressibility condition is considered. Two regularity criteria for the generalized Boussinesq equations are obtained.  
        关键词：generalized Boussinesq equations;regularity criterion;Morrey spaces   
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        发布时间：2023-12-11
      • LIU Lindong,CHEN Hongbin
        Vol. 52, Issue 2, Pages: 47-51(2013)
        摘要：It is important to manage and allocate the resources effective in a distributed cluster environment. Static resource allocation strategy can not meet the requirements of resources and requests- dynamic changes. It can produce some resource fragmentation in the resource pool, resulting in low utilization of grid resources.Classification mining models and algorithms about dynamic resources allocation are proposed. There is a process in every resource management server, mining the classification rules in the cluster based on history data and executing resource allocation based on these rules. Experiments show that DRA algorithm can better adapt to the changes in the grid environment compared to other allocation strategies and algorithms, and it can increase resources utilization in dynamic environment.  
        关键词：classification data mining;GRID;resource;dynamic resource allocation;cluster   
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        发布时间：2023-12-11
      • CHEN Liguo,LUO Cheng,WANG Jun
        Vol. 52, Issue 2, Pages: 52-56(2013)
        摘要：The dual notions of midpoint locallyk-uniformly convexity and midpoint locallyk-uniformly smooth on Locally Convex Spaces are introduced , which are generalizations of both midpoint locallyk-uniformly convexity (midpoint locallyk-uniformly smoothness) in Banach spaces and midpoint locally uniformly convexity (midpoint locally uniformly smoothness) in locally convex spaces. The relationship between them and the other convexity (smoothness) are discussed.  
        关键词：dual;midpoint locallyk-uniformly convexity;midpoint locallyk-uniformly smoothness;weakly midpoint locallyk-uniformly convexity;weakly midpoint locallyk-uniformly smoothness   
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        发布时间：2023-12-11
      • LIN Quanwen,ZHUANG Rongkun
        Vol. 52, Issue 2, Pages: 57-61(2013)
        摘要：By means of a new technique based on a class of functionsH(r,s,l)， new oscillation criteria are established for the second order nonlinear elliptic differential equation?•（A（x）?y）+q(x)f(y)=e(x),x∈Ωwhere Ω is an exterior domain inRN.Our results have higher general than existing conclusions.Information about the distribution of the zero of solutions is also obtained.  
          
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        发布时间：2023-12-11
      • CANG Dingbang,CHEN Cang,GE Shigang
        Vol. 52, Issue 2, Pages: 62-65(2013)
        摘要：First, the concept of generalized operator semigroups and some properties are given. Then by studying the stability of generalized operator semigroups, the asymptotic behavior representations for generalized operator semigroups are obtained. In addition, the equivalent conditions for strong stability and weak stability of generalized operator semigroups are also given.  
        关键词：generalized operator semigroups;asymptotic behavior;strong stability;weak stability   
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        发布时间：2023-12-11
      • LI Chunyuan,GONG Bing,HUANG Suping,SHE Zhigang,LIN Yongcheng,ZHOU Shining
        Vol. 52, Issue 2, Pages: 66-69(2013)
        摘要：Two mangrove endophytic fungi K38 and E33 from the South China Sea Coast were co-clutured. Five secondary metabolites, including Castaneiolide（1），（2S, 3R, 4E,2′R)-2-N-(2′-hydroxy-palmitoyl )-1-O-β-D-gluco-pyranosyl-9-methyl-4, 8-sphingadienine(2), cholesta -5-en-3β，7β，19α-triol(3)，3-hydroxy-4-(3-methylbut-2-enyloxy)benzaldehyde (4)，4-hydroxybenzaldehyde（5）, were isolated from this crude extracts. Among them, compounds1,2,4were found in marine fungi for the first time, and compounds1,2,3,4were not obtained from these two strains by pure fermentation.  
        关键词：mangrove endophytic fungi;co-culture;metabolites   
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        发布时间：2023-12-11
      • ZHU Yongkang,CHEN Wei,LIU Zongmiao,WAN Guojiang,WANG Jing
        Vol. 52, Issue 2, Pages: 70-73(2013)
        摘要：A novel long afterglow phosphor Y2O2S:Eu3+Zn2+Ti4+was synthesized by the solid state method. The energy transfer between persistent luminescence centers and defect centers occurs. The structures and optical properties of Y2O2S:Eu3+Zn2+Y2O2S:Eu3+Ti4+Y2O2S:Eu3+Zn2+Ti4+and Y2O2S:Eu3+Mg2+Ti4+materials were characterized by X-ray diffraction (XRD), photoluminescence and excitation spectra, persistent luminescence spectra and decay curves and thermoluminescence. The results showed that their fluorescence properties were similar with the persistent luminescence. Their emission peaks all located at 625 nm due to5D0→7F2transition of Eu3+ions. In comparison, the persistent luminescence performance of Y2O2S:Eu3+Zn2+Ti4+sample was the best, maintaining about 1.5 h.  
        关键词：long afterglow;yttrium oxysulfide;defect Luminescence;fluorescence spectrum;thermoluminescence   
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        发布时间：2023-12-11
      • FENG Huajie,SUN Zhenfan,CHEN Liuping,YANG Limei,LEI Bingxin,LI Gaonan
        Vol. 52, Issue 2, Pages: 74-78(2013)
        摘要：The band structure, density of states and optical absorption spectra of Fe-Doped TiO2with different concentrations were studied by first-principles calculation theory. The results showed that the increase of Fe-doped concentration leaded to an increase in impurity level. The peak of density of states appeared near fermi level and the peak value increased with increasing concentration of Fe, resulting in increasing the probability of electronic transition from impurity level to conduction band, and improving the rate of absorption of visible light. Furthermore, there was an optimal concentration corresponding to the high value of response of visible light in their absorption spectra.  
        关键词：titanium dioxide;electronic structure;doped with different concentrations;first-principles;impurity level   
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        发布时间：2023-12-11
      • WANG Zhifang,FU Ya,XIANG Jun,HUANG Zhaosheng,ZHANG Zhongqiang,SONG Huacan,ZHONG Ying,ZHANG Cuixian
        Vol. 52, Issue 2, Pages: 79-83(2013)
        摘要：In order to analyze chemical constituents and quality standard of Guangdong Liangcha, five glycosides were isolated. Their structures were determined to be 4-p- cumaroyl-D- glucose (1), 2α, 3α, 19α-trihydroxyursa-12-en--28-oic acid β-D-glucopyranosyl ester (2), 2α, 3β, 19α-trihydroxyursa-12-en-28-oic acid β-D-glucopyranosyl ester (3), 2α, 3β, 19α, 23- tetrahydroxyurs-12-en-28-oic acid β-D-glucopyranosyl ester (4), 6-C-glycopyr- anosyl luteolin (5) by spectroscopic analysis. Compound1was firstly obtained as a natural product, and compounds1,2,3,4,5were also firstly obtained from Guangdong Liangcha, which was contributed to further mechanism of bioactivity.  
        关键词：Guangdong Liangcha;chemical constituents;glycosides   
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        发布时间：2023-12-11
      • GAO Yunhang,WANG Wei,LI Qiuju,MA Hongxia,LOU Yujie
        Vol. 52, Issue 2, Pages: 84-89(2013)
        摘要：Five strains of bacteria with decomposed function for lignin and cellulose were isolated from gut of termite with a congo red and Azure-B plate method. MX5 strain with the strongest decomposed function was identified as Bacillus licheniformis by morphological observation, physiological and biochemical identification and 16S rRNA identification. Optimization test of producing lignin and cellulose show MX5 strain has the highest production activity with 0.5% of straw as carbon source, mixture of 0.5% yeast extract and ammonium sulfate as the nitrogen source and cultrue in shake flask at 37 ℃ for 96 h with 1%noculation amount and initial pH 8.0. Selecting excellent strains which produced ligninase and cellulase has far-reaching significance for improving the utilization of wood fiber feed, reducing environmental pollution and so on..  
        关键词：termite;lignin decomposing bacteria;cellulose decomposing bacteria;identification;conditions optimize   
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        发布时间：2023-12-11
      • LI Ning,SUN Junbo,WEI Jian,QIU Ligong,WANG Ting,SU Yingjuan
        Vol. 52, Issue 2, Pages: 90-96(2013)
        摘要：CVNH (cyanovirin-N homology, CVNH) is the homology protein of CVN, which is a novel anti-HIV glycoprotein. In the previous study, we have firstly reported the full-length sequences of CVNH gene cloned fromCeratopteris thalictroidesand constructed prokaryotic expression plasmid pET32a-CtCVNH. The plasmid DNA was transformed into Rosetta 2 (DE3)E. colicells for expression of the recombinant protein. In the study, we optimized culture conditions of CVNH protein expression, including the types and ingredients of the culture medium, initial pH, A600nmvalue, induction agents and concentrations, induction time, and expression time, respectively. The optimized culture conditions contained TB medium with 24 g·L-1yeast extract and 72 g·L-1tryptone, initial pH 8.0, and lactose induced for 6 hours at A600nm0.6, which would increase CVNH productivity to 1.9 times than before. This result laid a foundation to explore the drug development of CNVN.  
        关键词：CVNH;prokaryotic expression;optimized culture condition   
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        发布时间：2023-12-11
      • LIU Zhongzheng,LIANG Jieping,NIE Yichu,LIU Hong,XIE Chengshi,CHENG Guohua,SU Weiwei
        Vol. 52, Issue 2, Pages: 97-100(2013)
        摘要：Network pharmacology based on the computational molecular docking was used to study interaction of chemical composition of Compound Xueshuantong Capsule to the targets related to blood circulation and hemostasis. A compound-target interaction network diagram was generated. The results showed that the chemical compounds of Compound Xueshuantong Capsule interacts with the multiple targets, such as ACE and PDE, revealing the multitargeted regulatory mechanism of Compound Xueshuantong Capsules in the treatment of retinal vein occlusion on molecular level.  
        关键词：Compound Xueshuantong Capsule;network pharmacology;molecular docking   
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      • CHEN Peng,WU Long,GUO Cuiping,CAI Shaohui,CHEN Heru
        Vol. 52, Issue 2, Pages: 101-105(2013)
        摘要：Tyroservatide (YSV) and its structural modification (Z-GP-YSV-NH2) were successfully synthesized by solidphase peptide synthesis. The overall yields were 45.3% and 52.3% respectively. The stabilities of YSY and Z-GP-YSV-NH2in PBS buffer, DMEM culture and rat blood plasma were also investigated in this study. It was found that both YSV and Z-GP-YSV-NH2were stable in either PBS or DMEM medium. However, YSV was completely degraded after bathing in rat blood plasma for 2 h; while only 67% of Z-GP-YSV-NH2was degraded after 12-hours bath. In current paper, the cytotoxicities of YSV and Z-GP-YSV-NH2to human renal cell 293 were also evaluated. It was displayed that the cytotoxicities of both compounds were very low, in which the growth inhibition rate were 20% and 10.3% respectively when the dosages were 200 μg/mL.  
        关键词：tyroservatide;structural modification;antitumor peptides   
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        发布时间：2023-12-11
      • ZHENG Lei,ZHOU Yongzhang,ZENG Changyu
        Vol. 52, Issue 2, Pages: 106-114(2013)
        摘要：The Pangxidong fracture zone of Guangdong developing in south of Qinzhou Bay(Q)-Hangzhou Bay(H) juncture orogenic belt is an important structure controlling silver-gold deposits forming and also a significant window to see the tectonic evolution history of Q-H juncture orogenic belt. The mylonites from it are studied in this paper. It researches the fractal feature and mainly rheological parameters of dynamically recrystallized quartz grains in mylonites. Classical S-C fabrics are founded in mylonites. This NE-trending ductile shear zone is dextral shear according to studying σ-rotational porphyroclasts. Under the light microscope, undulatory extinction, core-mantle structure, sub grain, dynamic recrystallization, elongated single crystal and quartz ribbon are observed. The widespread dynamic recrystallization of quartz grains which are slightly elongated and directed have jagged and indented boundaries. The ductile deformation temperature of rocks in Pangxidong fracture zone is approximately 600℃ through fractal analysis and microscope observation, which presents low amphibolite facies. The quartz recrystallized grain size paleopiezometer suggests that the differential stress is 9.1-10.7MPa(lower limits). The extrapolation of quartzite flow laws shows the strain rate is under 10-13.8s-1. These rheological parameters can be used in a deeper research on the ductile deformation process of Pangxidong fracture zone.  
        关键词：dynamically recrystallized quartz grain;rheological parameter;fractal;mylonite;Pangxidong fracture zone of Guangdong;Q-H juncture orogenic belt   
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      • YAO Rui,CHEN Zishen
        Vol. 52, Issue 2, Pages: 115-120(2013)
        摘要：The spatio-temporal characteristics of flood and drought in Guangxi were analyzed using standardized precipitation index, Mann-Kendall test and REOF based on the observed monthly precipitation data of 74 meteorological stations from 1961 to 2008. The results indicate that: (1) flood and drought disasters have stage characteristics, i-e. Droughts were frequent in 1960s, mid 1980s to early 1990s and the 21-st -century, while floods were severe and frequent during 1970s to early 1980s and in the late 1990s; (2) Guangxi can be divided into four regions, northeast Guangxi, northwest Guangxi, southeast Guangxi and southwest Guangxi, which have similar trends of extreme flood and drought disasters to the whole region. Sometimes there are some differences between severe drought and flood in different areas. The frequency of severe drought occurred in northeast and southeast Guangxi is higher than other regions. However, the frequency of severe flood occurred in southwest Guangxi is high.  
        关键词：standardized precipitation index;flood and drought;spatiotemporal characteristics;Guangxi   
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      • CAO Qihuan,LIU Yuan,ZHOU Maichun,ZHONG Xiangning
        Vol. 52, Issue 2, Pages: 121-128(2013)
        摘要：Using AVHRR NDVI (normalized difference vegetation index), IGBP land cover and CRU meteorological database, potential evapotranspiration (PET) over Hanjiang River basin in 1981-2000 was estimated by Shuttleworth-Wallace (S-W) model. Spatially, PET was distributed over the basin strikingly non-uniformly from 714.8 mm to 1 570.7 mm yearly, mainly because of the influence of land cover types and geographical location. Temporally, PET changed significantly with vegetation seasonal development, thus with vegetation leaf area index (LAI). Temporal and spatial resolutions of input data greatly affected PET estimation accuracy. Compared with Thornthwaite formula and FAO-56 method, S-W model can reflect the effects of vegetation change on PET very well. By applying the derived PET to a distributed hydrological model - BTOPMC, good results was achieved in the Hanjiang River basin.  
          
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      • MAO Keyang,SUN Zuoyu,YAN Lewei,WANG Hui
        Vol. 52, Issue 2, Pages: 129-132(2013)
        摘要：The optimization of actuators of an active control structure under seismic excitation is studied. The random excitation is generated by equivalent excitation method, and the state space control algorithm is employed to calculate the dynamic responses. An optimized procedure based on genetic algorithm is proposed, in which a 0-1 chromosome coding is used to resemble the spatial arrangement of actuators. Several typical cases are analyzed, in which the fitness objectives are composed of maximum acceleration response and maximum inter-story angle, while the structure is controlled by certain actuators. The results demonstrate that the proposed method is suitable and effective.  
        关键词：state space control;equivalent excitation method;genetic algorithm;optimization of actuators.   
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        发布时间：2023-12-11
      • QIU Xiaonuan,FAN Shaojia
        Vol. 52, Issue 2, Pages: 133-136(2013)
        摘要：Base on the hourly wind data of four auto-meteorological station on the west side of Pearl River Estuary in Nansha, Guangzhou from 2001 to 2008, the processing method for auto-meteorological station data and the technology of separation and judgment of local circulation such as the sea-land breeze in coastal area were established. These processing method and the technology of separation and judgment of local circulation can be programmed. The results of Nansha sea-land breeze analysis by the established methods with autometeorological station data were consistent well with the general rules, and it showed the local characteristics of Nansha sea-land breeze well.  
        关键词：auto-meteorological station;data processing;separation and judgment technology of local circulation;sea-land breeze   
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