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Debris Flow Hazard Assessment Based on Support Vector Machine

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Wuhan University Journal of Natural Sciences 2006年第4期11卷 897-900页

作者： YUAN Lifeng 1, 2., ZHANG Youshui 3 1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, chengdu 61.041. {2., china 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, china 3. Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, china Institute of Mountain Hazards Environment Chinese Academy of Sciences 610041 Chengdu Sichuan China Graduate University of Chinese Academy of Sciences 100049 Beijing China Institute of Geographical Sciences Natural Resources Research Chinese Academy of Sciences 100101 Beijing China

Seven factors, including the maximum volume of once flow , occurrence frequency of debris flow , watershed area , main channel length , watershed relative height difference , valley incision density and the length ratio of sediment supplement are chosen as evaluation factors of debris flow hazard degree. Using support vector machine （SVM） theory, we selected 2.9 basic data of 37 debris flow channels in Yunnan province as learning samples in this study. We create a debris flow hazard assessment model based on SVM. The model was validated though instance applications and showed encouraging results.

关键词： debris flow hazard assessment support vector machine (SVM)

earthquake-Generating Structure During the Period of the 1992.sichuan Lima earthquake Sequence

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earthquake Research in china 1996年第3期10卷 63-74页

作者： Zhao Zhu and Chen NongSeismological Bureau of sichuan province,{2. 61.041.china

In this paper,a test or alternative scheme for studying large earthquake sequences through the study of small earthquake sequences is suggested,and a small earthquake sequence,the Lima earthquake sequence for which analogue records have been turned into digital data,is used *** order to provide the deep construction background and the spatial distribution of structure for generating earthquakes,the P-wave and S-wave layered velocity models in this area are obtained by using mine explosion and earthquake observed records; then,the hypocenter locations and focal depths of the Lima earthquake sequence are determined adopting the velocity models given above and using a location method with numerical properties for a microseismic monitoring network(Zhao et al.,1994)and a new method for determining focal depth from data of a local seismographic network(Zhao,1992.; finally,based on this,the variation of quality factor Q of the crustal medium during the period of the sequence is *** obtained

关键词： earthquake sequence Focal location Focal depth Quality factor Q

The Recent Crustal Deformation on the sichuan-Yunnan Rhombic Block Boundaries

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earthquake Research in china 2002年第4期16卷 304-314页

作者： Lü Yipei 1), Liao Hua 2., Su Qin 2. and Wang Lan 2. 1)Seismological Bureau of sichuan province,{2. 2.Geodetic Brigade of Seismological Bureau of sichuan province, Ya’an 62.000, china Seismological Bureau of sichuan province Chengdu 610041 China Geodetic Brigade of Seismological Bureau of sichuan province Ya'an 625000 China

Based on data from an across-fault survey along the sichuan-Yunnan rhombic block boundaries, the recent deformation characteristics on each fault have been analyzed. It was found that the rate of crustal deformation is slowing down along the northern segment and increasing along the southern segment. Each fault has different features of deformation. The horizontal deformation is mainly characterized by left-lateral strike-slip. The rate of vertical deformation is less than that of the horizontal deformation. The faults have the feature of upper wall uplifting alternated with descending. The anomaly changes of crustal deformation at some sites are closely related to the seismicities near the sites.

关键词： The sichuan-Yunnan rhombic block Crustal deformation earthquake Across-fault survey

ANALYSIS OF THE MECHANISM MODELS OF TECHNOLOGICAL INNOVATION DIFFUSION

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Journal of Systems Science & Complexity 2004年第3期17卷 369-376页

作者： XUJiuping HUMinan SchoolofBusinessandadministration SichuanUniversityChengdu610064China

This paper analyzes the mechanism and principle of diffusion of technology diffusion on the basis of quantitative analysis. Then it sets up the diffusion model of innovation incorporating price, advertising and distribution, the diffusion model of innovation including various kinds of consumers, and the substitute model between the new technology and the old one applied systems dynamics, optimization method, probabilistic method and simulation method on computer. Finally this paper concludes with some practical observations from a case study.

关键词： diffusion technological innovation dynamic system hopf bifurcation

Behavior features of heavy metals in the Haikou Bay waters

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Acta Oceanologica Sinica 1999年第2期18卷 247-255页

作者： Chen Chunhua Wang Zhengfang and Lu Haiyan 1. Marine Exploitation Plan and Design Research Institute of Hainan province, Haikou 5702.3, china 2. Second Institute of Oceanography, State Oceanic {2., Hangzhou 310012. china (Received July 12. 1996 Mar. Exploitation Plan Des. Res. I. Haikou 570203 China Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China

Dissolved Cu, Ph, Zn and Cd in the Haikou Bay waters were measured to be respectively in the range concentrations of 0.47-1.16 μg/dm^3, 0. 94-- 2. 36μg/dm^3, 1.2.-4.83 μg/dm^3 and 0. 005-0.072.g/dm^3; with respectively average values of 0.78μg/dm^3, 1.36μg/dm^3, 3.14 g/dm^3 and 0. 03 μg/dm^3. Dissolved Cu and Zn concentrations are relatively high at the stations near the Longkun Road Outfall for domestic sewage, the Xiuying Outfall for industry waste water and the Haidian Island Estuary, but dissolved Pb and Cd concentrations are low in these stations. The values in Other stations are comparatively homogenous. Vertical dissolved Cu, Pb and Zn concentrations at the bottom layer are higher than at the surface layer, but dissolved Cd concentration appears to be on the opposite. The measurement results of Cu, Pb, Zn and Cd in suspended particle show that particulate matters in the Haikou Bay seawater play a role in purifying heavy metals. The study on strong complexed form and non-liable form of dissolved copper show that the ratio of strong complexed form and dissolved form is about 85%, and non-liable form is very low with a value lower than 5 nmol/dm^3. Therefore, copper in the Haikou Bay seawater cannot cause influence on marine organisms.

关键词： Haikou Bay seawater heavy metal behavior feature

Fuzzy dot ideals and fuzzy dot H-ideals of BCH-algebras

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Applied Mathematics(A Journal of Chinese Universities) 2008年第1期23卷 101-106页

作者： PENG Jia-yin Key Laboratory of Numerical Simulation of sichuan province,Neijiang 641112.{2. Dept.of Math.,Neijiang Teachers College,Neijiang 641112.{2.. Key Laboratory of Numerical Simulation of sichuan province Neijiang China Dept. of Math. Neijiang Teachers College Neijiang China

The notions of fuzzy dot ideals and fuzzy dot H-ideals in BCH-algebras are introduced, several appropriate examples are provided, and their some properties are investigated. The relations among fuzzy ideal, fuzzy H-ideal, fuzzy dot ideal and fuzzy dot H-ideals in BCH- algebras are discussed, several equivalent depictions of fuzzy dot ideal are obtained. How to deal with the homomorphic image and inverse image of fuzzy dot ideals （fuzzy dot H-ideals） are studied. The relations between a fuzzy dot ideal （fuzzy dot H-ideal） in BCH-algebras and a fuzzy dot ideal （fuzzy dot H-ideal） in the product algebra of BCH-algebras are given.

关键词： BCH-algebra fuzzy (dot) ideal fuzzy (dot) H-ideal homomorphism.

Effect of Grain Size of CaCO_3 and SiO_2.on the Formation of C_3S Under Different Conditions

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Journal of Wuhan University of Technology(Materials Science) 2007年第3期22卷 533-536页

作者：卢忠远 School of Material Science and Engineering Southwest University of Science and Technology

The effect of grain size of CaCO3 and SiO2.on the formation of C3S under various conditions, such as rapid heating rate（800 ℃/min）, normal heating rate（30 ℃/min） and in the presence or absence of ZnO, was studied. The results show that the decomposition temperature of CaCO3, the temperature of appearance of liquid phase and the f-CaO content descend when the grain size of CaCO3 and SiO2.becomes smaller, which attributes to the reactive activity enhancement of powders due to the decrease of the particle size. When the grain size of CaCO3 and SiO2.is below 1 μm, the rate of the formation of C3S is greatly raised. A rapid sintering rate and the presence of ZnO have an important effect on the formation of C3S and can lower the temperature of the formation of C3S by about 50 ℃.

关键词： grain size C3S rapid sintering ZnO

Research on the Historical Data of the 1585 A. D. South Chaoxian earthquake and Its Seismogenic Structure

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earthquake Research Advances 2010年第1期24卷 106-116页

作者： Zhai Hongtao1) ,Deng Zhihui2. ,Zhou Bengang2. ,Li Guang1) ,and Zheng Yingpin1) 1) earthquake administration of Anhui {2.,Hefei 2.0031,china 2. Institute of Geology,china earthquake administration,Beijing 10002.,china earthquake administration of Anhui {2. Hefei 230031 China Institute of Geology China Earthquake Administration Beijing 100029 China

In 1585,a MS5 3/4 earthquake occurred in the south of Chaoxian county,Anhui province. The parameters of this earthquake were reported differently in various versions of earthquake catalogues. According to detailed textual research on the historic records of this earthquake,the epicenter location of the earthquake was further confirmed by means of seismo-geological field investigations in the Chaohu-Tongling region along the western Yangtze River valleys. Shallow seismic prospecting and drilling methods were applied in studying the buried fault. The possibility of the existence of seismogenic faults and fault activity in the western Yangtze River area were analyzed in depth,and the causative tectonic background of the 1585 MS5 3/4 south Chaoxian earthquake was studied. The results of this study indicate that the Yanjiaqiao-Fengshahu fault,which was active in the early to mid-Pleistocene,is possibly the causative structure of this earthquake. To identifying the seismogenic structure of the 1585 south Chaoxian earthquake will help gain more knowledge about the tectonic background of moderate and small earthquake activity in Eastern china.

关键词： Historical earthquake verification Seismogenic structure Chaoxian,Anhui

Ladinian radiolarian fauna, siliceous rock from the Xianshuihe Belt, West sichuan and their tectonic significance

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Science china Earth Sciences 2005年第1期48卷 42-47页

作者： LIANG Bin, FENG Qinglai, WANG Quanwei, GUO Jianqiu, ZHONG Changhong & LI Zhenjiang Faculty of Earth Science, china University of Geosciences, Wuhan 430074, china {2. Geological Survey, chengdu 610000, china 1. Faculty of Earth Science China University of Geosciences 430074 Wuhan China 2. sichuan Geological Survey 610000 Chengdu China

Ladinian radiolarian fauna, including Muelleritortis, Baumgartneria, Oertlispongus, Paroertlispongus, Pseudoertlispongus, etc., was discovered from the siliceous rock of the Runiange Formation in the Xianshuihe belt, West sichuan province. Geochemical test on five samples from the siliceous rock indicates that SiO2.content varies in 71.16%-90.06% and Si/Al ratio, in 49-71, which shows that the siliceous rock contains more terrigenous mud sediments. The siliceous rock is characterized by the large ratios of Al2.3/(Al2.3+Fe2.3) (0.63-0.81) and Ti/V (>2.), the low ratio of V/Y (2.8), and low vanadium content (2. μg/g), which are similar to the geochemical characteristics of continental margin siliceous rock. The Ce/Ce* ratios of the four samples vary in 1.02.1.47 and the LaN/CeN ratio, in 0.75-1.07, which imply that the siliceous rock was deposited in the continental margin basin. But only one sample is similar to the oceanic siliceous rock in REE. Turbidite-siliceous rock bearing radiolarian-basalt assemblage and the geochemical characteristics of the siliceous rock indicate that the Xianshuihe belt is in the strong rift stage in the Ladinian age.

关键词： siliceous rock, radiolarians, Triassic, the Xianshuihe belt, West sichuan.