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2.12.National Conference on information technology and Computer {2.

作者： Xiaohua Li School of Computer and information Engineering Beijing university of Agriculture Beijing,{2. Jian Xu School of Computer and information Engineering Beijing university of Agriculture Beijing,{2. Juan Nie School of Computer and information Engineering Beijing university of Agriculture Beijing,{2. Chengkui Guo School of Computer and information Engineering Beijing university of Agriculture Beijing,{2. Xiangang Zhao National Satellite {12. Center china {12. Administration Beijing,{2.

Designated Router （DR） is the key for the quality of an Open Shortest Path First （OSPF） network and it enables a reduction in the number of adjacencies,which in turn reduces the amount of routing protocol traffic and the size of the Link State Database （LSDB）.In this paper,we analyze the principle of OSPFv2.s DR election algorithm and carry out the simulation based on *** simulation can provide a reference for building an OSPF *** the simulations,we focus on two types of DR Election process:Normal DR Election and DR *** results show that the election of DR and BDR can reduce the amount of OSPF traffic and ensure an orderly transition from Backup Designated Router to Designated ***,through the simulation we also learn that lots of unnecessary DR election operations are executed,which consume the routers’ CPU resource and occupy their processing *** improve the election algorithm,we offer several *** detach and subdivide the NeighborChange event that invokes the election algorithm into more specific *** these measures,the DR election algorithm is expected to dispense with the extra election,reduce network convergence speed,and thereby improve network performance.

关键词： OSPF DR BDR DR Election GNS

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Research Advances on the Loess-Bedrock Landslide in china

Research Advances on the Loess-Bedrock Landslide in China

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2.12.Asia Pacific Conference on Environmental science and technology(APEST 2.12.

作者： Chengyi Fan1 a Shouyun Liang1 b and Xiangxian Ma2.c 1 key laboratory of Mechanics on {2. and Environment in Western china the Ministry of Education of china and Department of Geological Engineering College of Civil Engineering and Mechanics Lanzhou university Lanzhou 730000 P.R.china 2.key laboratory of Petroleum Resources Research Institute of Geology and Geophysics Chinese Academy of sciences Lanzhou 730000 P.R.china

Loess landslide is one of the serious geological disasters in and around the loess plateau in northwest of *** the major type of loess landslide in this area,loess-bedrock landslide widely distributes,frequently occurs,and causes serious casualties and property *** the formation mechanism and protection countermeasures arousing increasingly,the scientists have paid close attention and got a series of research *** is very important of systematic summary and thorough analysis of the loess-bedrock landslide for reducing disasters caused by loess *** acquired achievements of the loess-bedrock landslide have been summarized on classification,formation mechanism,influencing factors and hazard range,and some main fields are put forward for further researching:（1） to explore the control action and boundary effect of paleo-weathering crust upon the top of bedrock for the loess-bedrock landslide;（2. to research the influence of the orientation and the top fluctuant configuration of bedrock and the slope structure on loess landslide;（3） to study the relationship between the landslide formation and the slope profile structure,the physical,hydrological and mechanical properties of the rock-soil mass;（4） to research the critical value of locked segment in the loess-bedrock cutting layer landslide;（5） to analyze the main influencing factors and forecast the hazard range of different types of the loess-bedrock landslide.

关键词： Loess-bedrock landslide Landslide classification Formation mechanism Hazard range Research advances.

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information Detection of Seismic Debris Flow by UAV High-resolution Image Based on Transfer Learning

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Earthquake Research in china 2019年第1期33卷 112-119页

作者： GUO Jiawei LI Yongshu WANG Hongshu LU Heng WANG Xiaobo Faculty of Geosciences and Environmental Engineering Southwest Jiaotong University information technology Center of Chengdu Planning and Management Bureau Department of Surveying and Mapping Engineering Sichuan Water Conservancy Vocational College State key laboratory of Hydraulics and Mountain River Engineering Sichuan University College of Hydraulic and Hydroelectric Engineering Sichuan University Provincial Geomatics Center of Qinghai Geomatics technology and Application key {2. of Qinghai Province

A large number of debris flow disasters(called Seismic debris flows) would occur after an earthquake, which can cause a great amount of damage. UAV low-altitude remote sensing technology has become a means of quickly obtaining disaster information as it has the advantage of convenience and timeliness, but the spectral information of the image is so scarce, making it difficult to accurately detect the information of earthquake debris flow disasters. Based on the above problems, a seismic debris flow detection method based on transfer learning(TL) mechanism is proposed. On the basis of the constructed seismic debris flow disaster database, the features acquired from the training of the convolutional neural network(CNN) are transferred to the disaster information detection of the seismic debris flow. The automatic detection of earthquake debris flow disaster information is then completed, and the results of object-oriented seismic debris flow disaster information detection are compared and analyzed with the detection results supported by transfer learning.

关键词： Earthquake Debris flow UAV high-resolution image Transfer learning information detection

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Economic Risk Analysis Method of Flood Control Engineering System Based on Stochastic Simulation of Triangular Fuzzy Numbers

Economic Risk Analysis Method of Flood Control Engineering S...

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2.09中国控制与决策会议

作者： JIN Ju-liang~(1,2.,FAN Qiu-ying~2.ZHANG Ming~3,ZHOU Yu-liang~2.1.Chengdu Institute of Plateau Meteorology,CMA,Chengdu 610072.china. 2.School of Civil Engineering,Hefei university of {2.,Hefei 2.0009,china. 3.College of Hydrology and Water Resources,Hohai university,nanjing 2.0098,china.

＜正＞Economic risk analysis of flood control engineering system is very important in risk management of flood *** triangular fuzzy numbers theory was used to describe and deal with randomicity and fuzziness of economic risk system of flood control engineering,and the shortage and imprecision of datum *** order to deal with the difficulties of operations of triangular fuzzy numbers and their functions,Monte-Carlo method was used to simulate triangular fuzzy numbers,which can transform the operations of triangular fuzzy numbers and their functions into the conventional operations of real numbers,and then a new economic Risk Analysis Method for flood control engineering system based on Stochastic Simulation of Triangular Fuzzy Numbers,named RAM-SSTFN for short,was *** applied results of RAM-SSTFN show that economic benefit series of flood control engineering system can be simulated using Monte-Carlo method,that RAM-SSTFN can consider more complex things and give more exact computation results than the simple analysis methods of economic risk analysis of flood control engineering system,and that the common simple analysis methods should be used carefully in economic risk analysis of important regional flood control engineering system because their computation precision is not ***-SSTFN can be used to deal with less,imprecise, random and fuzzy information,so it can be widely applied to risk management of different uncertainties systems.

关键词： flood control system economic risk analysis triangular fuzzy numbers Monte-Carlo method risk management

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Variation Characteristics of the Large-scale Frost in East Region of the Yellow River of Gansu in Recent 40 Years

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meteorological and Environmental Research 2011年第11期2卷 42-45,59页

作者： DU Liang-liang,CHEN Xiao-yan,YANG De-bao,SHANG Ke-zheng,WANG Shi-gong Gansu key laboratory of Arid Climate Change and {2. Reduction,School of Atmospheric sciences,Lanzhou university,Lanzhou 730000,china

[Objective]The research aimed to study variation characteristics of large-scale frost in the east region of the Yellow River of Gansu in recent 40 years.[Method]Based on daily minimum temperature data at 15 meteorological stations over the east region of the Yellow River of Gansu from 1969 to 2.08,according to common climatic statistical index of the frost,variation characteristics of the large-scale frost and continuous frost in the east region of the Yellow River of Gansu in recent 40 years were studied.[Result]Since the 1990s,average last frost date in the east region of the Yellow River of Gansu obviously advanced,and first frost date started to obviously *** time of the last frost date was longer than postponing time of the first frost *** frost-free period also obviously *** early first frost date and extremely late last frost date mainly happened in the 1970s and the *** late first frost date and extremely early last frost date mainly happened after the middle period of the *** long frost-free period gradually started to appear *** recent 40 years,the continuous frost gradually decreased,and the intensity also declined.[Conclusion]The research was favorable for understanding change characteristics of the frost and climate in the east region of the Yellow River of Gansu,and had important guidance significance for improving prediction capability of the abnormal frost disaster,effectively preventing frost disaster and improving crop yield in the area.

关键词： Frost East region of the Yellow River Variation characteristics Frost-free period china

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Macrophysical properties of specific cloud types from radiosonde and surface active remote sensing measurements over the ARM Southern Great Plains site

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Atmospheric and Oceanic science Letters 2017年第1期10卷 29-35页

作者： ZHANG Jin-Qiang CHEN Hong-Bin key laboratory of Middle Atmosphere and Global Environment Observation Center of Technical Support and Service IAPCA

Accurate observation of clouds is challenging because of the high variability and complexity of cloud types and *** using the long-term cloud data collected during the ARM program at the Southern Great Plains central facility during 2.01-2.10,the consistencies and differences in the macrophysical properties of clouds between radiosonde and ground-based active remote sensing are quantitatively evaluated according to six cloud types：low;mid-low（ML）;high-midlow;mid;high-mid（HM）;and high.A similar variability trend is exhibited by the radiosonde and surface observations for the cloud fractions of the six cloud ***,the magnitudes of the differences between the two methods are different among the six cloud types,with the largest difference seen in the high *** distribution of the cloud-base height of the ML,mid,and HM clouds agrees in both methods,whereas large differences are seen in the cloud-top height for the ML and high *** cloud thickness variations generally agree between the two datasets for the six cloud types.

关键词： Cloud macrophysical properties cloud types radiosonde remote sensing

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RESPONSE ANALYSIS OF OASIS VEGETATION TO TEMPERATURE SHARP CHANGE BASED ON RS——A CASE STUDY OF SHIHEZI REGION

RESPONSE ANALYSIS OF OASIS VEGETATION TO TEMPERATURE SHARP C...

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Progress of information technology in Agriculture

作者： Zhang Li Yang Pengrun Zhang Bin Department of Environmental science Xinjiang Agriculture university Post Code:830052.Urumchi {2. Shihezi science&technology Committee Post Code:832.00 Xinjiang {2.

＜正＞ The weather disaster results in the reduction of crop output, which is concerned and researched by farmers and scientists. By using 2.00, 2.01, 2.02.meteorological data and Normalized Difference Vegetation Index from RS image data of the same term, with the support of RS,GIS and mathematical *** paper analyzes vegetation response to air temperature sharp change in Xinjiang Shihezi region.

关键词： remote sensing technique the sharp change of air temperature NDVI vegetation response

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Allocation and Scheduling of Relief Materials based on GIS

Allocation and Scheduling of Relief Materials based on GIS

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2.11 IEEE International Conference on Spatial Data Mining and Geographical Knowledge Services(ICSDM 2.11)

作者： Xiaohui Su~(#*1) Xiaodong Zhang~(+2. Sanchao Liu~(#*3) Siquan Yang Jianyu Yang Yanqing Chen Jingyu Xu # College of information and Electrical Engineering china Agricultural {2. No.17 Tsinghua East Road Beijing 100083 P.R.china * National Committee disaster Reduction Ministry of Civil Affairs of the People’s Republic of china Beijing P.R.china +College of information and Electrical Engineering china Agricultural {2. No.17 Tsinghua East Road Beijing 100083 P.R.china

＜正＞The losses caused by natural disasters are increasing, especially in 2.st century,the security and the losses increased. Responding natural disasters and reducing losses become an urgent task which facing all of *** paper will propose an allocation method of relief materials for pre-disasters and a shortest-time and potential-considered scheduling model for *** allocation method for relief materials considers service areas of the storehouse along roads and risk level of natural *** scheduling model combines the basics of operation research and shortest path based on *** methods based on GIS can directly show the distribution and the routes for *** the paper will make an example against the backup of Wenchuan earthquake according to the current problems in order to relief the losses.

关键词： allocation of relief materials scheduling model GIS natural disasters service area of storehouse

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Study on disaster Risk Management Framework in Tourist Destination

Study on Disaster Risk Management Framework in Tourist Desti...

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2.09 International Conference on Environmental science and information Application {2.

作者： Xinliang Ye Tourism Institute Shanghai Normal university/Shanghai university of Engineering {2. Shanghai china Jiahong Wen Tourism Institute Shanghai Normal university Shanghai china

It has been proved by the practice that effective emergency management after a disaster still causes an irreparable *** paper explores the difference between risk management and emergency management in tourist destination based on the theory and practice of disaster risk management in tourism destination in{2. and *** the paper studies the methodology of establishing disaster risk management framework in particular tourist destination,including the work framework,laws and regulations framework and institutional *** paper puts forward a four-in-one tourism risk management framework what was called by TGER DRM,from the aspect of cooperation of tourists,local governments,tourism operating enterprises and local residents.

关键词： tourist destination disaster risk management framework

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Assessment Model of Set Pair Analysis for Flood Loss Based on Triangular Fuzzy Intervals under α-Cut

Assessment Model of Set Pair Analysis for Flood Loss Based o...

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2.09中国控制与决策会议

作者： PAN Zheng-wei~1,WU Kai-ya~2.JIN Ju-liang~3,LIU Xiao-wei~1 1.College of Natural Resources and Environmental Engineering,Hefei university of technology,Hefei 2.0009,{2. 2.National Innovative Institute for Public Management and Public Policy,Fudan university,Shanghai,2.0433,{2. 3.School of Civil Engineering,Hefei university of technology,Hefei 2.0009,{2.

＜正＞The flood disaster is one of the most serious natural *** is the important basis of making plan for flood control to assess flood losses *** results of the common assessment methods are discrete values and low resolution which are applied widely at *** research to more precise,more intuitive method of loss evaluation for flood disaster is the *** set pair analysis assessment model was established by the a-cut set of triangle fuzzy number A in this *** case study shows this method not only presents the concrete rank of flood lose,but also finds that the evaluating rank is a confidence interval;in addition,we can obtain priorities of different areas by the expectation and square difference method for priorities of interval numbers.

关键词： flood lose set pair analysis triangle fuzzy number α-cut set interval numbers expectation and square difference method for priorities

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