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Relationships between ground motion parameters and landslides induced by Wenchuan earthquake

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Earthquake Science 2010年第3期23卷 233-242页

作者： xiuying wang Gaozhong Nie Dengwei wang Institute of Crustal Dynamics China Earthquake Administration Beijing 100085 China Institute of Geology China Earthquake Administration Beijing 100029 China Xichang Seismic Station Earthquake Administration of Sichuan Province Xichang 615022 China

The MS8.0 Wenchuan earthquake induced severe landslide *** the first time in China,large numbers of strong motion records were obtained during the Wenchuan earthquake,providing the opportunity to study the relationships between ground-motion parameters and the earthquake-induced *** 40 groups of records from the main shock distributed along the Longmenshan fault lines were used to carry out this *** results appropriate to the Longmenshan area are as follows：1 The threshold of the peak ground acceleration（PGA） is about 0.7 m/*** the PGA reaches 2 m/s2,the landslide hazards are very serious; 2 The threshold of the peak ground velocity（PGV） is about 0.5 m/*** the PGV reaches 1.5 m/s,severe landslide hazards will be induced; 3 The threshold for the Arias intensity（Ia） is about 0.2 m/*** the Ia in one horizontal direction reaches 2 m/s,landslide hazards will be very serious; 4 As for the relevance order of the parameters to earthquake-induced landslides,Ia is the leading parameter,followed by PGV,and finally *** results presented in this paper are consistent with the results from other studies,indicating that the threshold of the ground motion parameters for strong earthquakes is of the same order of magnitude as that of moderate *** density of local sites fluctuated with the increase of ground motion intensity if the thresholds were *** the upper limits are exceeded,the landslide density remains at a certain level with relatively little variation.

关键词： Wenchuan earthquake earthquake-induced landslide peak ground acceleration peak ground velocity Arias intensity

Analysis of landslide damage caused by the 2008 Wenchuan earthquake using strong motion data: A case study in the Beichuan county town

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Earthquake Science 2012年第4期25卷 307-313页

作者： xiuying wang Gaozhong Nie Song wang Institute of Crustal Dynamics China Earthquake Administration Institute of Geology China Earthquake Administration China Earthquake Networks Center

The county town of Beichuan county, China, experienced catastrophic destruction due to landslides induce by the 2008 Wenchuan earthquake. In consideration of the special location of the county town, this paper selected the landslides induced in the town as representative of large-scale near-rupture landslides, and quantitatively analyzed why the landslide damage was so destructive in the town by using strong motion data obtained from the Wenchuan earthquake in the Longmenshan area. Three methods were employed to estimate the landslide damage using strong motion data. （1） Peak ground accelerations （PGAs） on the hanging wall were used to evaluate the PGAs on the landslide sites in the town. The evaluated average PGAs were all greater than I g, indicating that the ground motion intensity was very strong during the earthquake. （2） Acceleration time histories, from another station with similar geological conditions to the town, were used to evaluate the critical acceleration changing range, and the estimated values showed the geological conditions were very susceptible to earthquakes. （3） Acceleration time histories, from two stations on the hanging and foot walls of the rupture, and near the town, were used to calculate the Newmark displacements, and all the evaluated displacements indicated that landslides were very likely. The results show that the slopes, susceptible to earthquakes in the Beichuan county town, were easily triggered under such strong ground-motion intensity and developed into large-scale catastrophic events.

关键词： Wenchuan earthquake landslide strong motion evaluation critical acceleration

Maintaining the connected river-lake relationship in the middle Yangtze River reaches after completion of the Three Gorges Project

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International Journal of Sediment Research 2017年第4期32卷 487-494页

作者： xiuying wang Xiang Li Baiyinbaoligao Yihong Wu State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower Research

After operation of the Three Gorges Project(TGP), there is a new evolution tendency for rivers and lakes in the middle reaches of the Yangtze River(i.e. the Ching River reaches). In recent years, the weakening connection relationship between the Yangtze River and Dongting Lake has resulted in a series of problems for flood regulation, water resources utilization, and aquatic ecosystem protection in the river-lake joint area. In this paper, the hydrological characteristics and fluvial processes within the river-lake joint area are studied, and possible management strategies to maintain the connected river-lake relationship are proposed. To achieve this objective, the evolution tendency, such as the zero-flow problem and river regime for three major outlets(i.e. the Songzi Outlet, Taiping Outlet, and Ouchi Outlet) to Dongting Lake from the Yangtze River, is analyzed. It is believed that the Songzi Outlet has a comparative advantage in flow diversion over the other two outlets. The Range of Variability Approach is introduced to identify hydrological characteristics at the Songzi Outlet. Several characteristic values of flow diversion from this outlet during drought periods are determined. Then, the fluvial processes in the river-lake joint area are studied by comparing topographic maps and using control gauge station data of various years. The water and sediment flux are analyzed before and after operation of the TGP. Finally, based on the results obtained, two possible management strategies are recommended and corresponding parameters are estimated to strengthen and maintain the connected river-lake relationship. This analysis takes into account operation of the TGP, mainstream shift and increasing riverbed scour in the Ching River *** restore the flow diversion condition to that in the 1950 s or 1960 s(i.e. 140 m~3/s of flow diversion corresponding to 5500 m~3/s of flow at the Zhicheng station), it is estimated that the river channel around the Songzi Outlet s

关键词： River-lake relationship Yangtze River Dongting Lake Three Gorges Project Flow diversion

Evaluation model of landslide hazards induced by the 2008 Wenchuan earthquake using strong motion data

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Earthquake Science 2011年第3期24卷 311-319页

作者： xiuying wang Gaozhong Nie Mujun Ma Institute of Crustal Dynamics China Earthquake Administration Beijing 100085 China Institute of Geology China Earthquake Administration Beijing 100029 China National Earthquake Response Support Service Beijing 100049 China

Landslides induced by the 2008 Wenchuan earthquake in the Longmenshan area were relatively well instrumented, which makes it possible to investigate the landslides using ground motion records. Firstly, this paper analyzes the data from Wenchuan earthquake on both regional and local site scale. The analyses show that the Newmark accumulative displacement calculated from the ground motion recorded in a particular geological hazard zone corresponds to the hazard intensity in that zone; the larger the displacement, the more serious the geologic hazard. The calculated result also shows that the displacement is related to the Arias intensity, which represents the total energy released during the earthquake at the observation site. Secondly, this paper constructs an evaluation model of Newmark displacement calculated with Arias intensities to estimate the subsequent slope failure resulting from the earthquake. The calculated results based on the model fit well with the distribution of actual landslides, suggesting that this method is useful for hazard evaluation. Therefore, this type of model can be used for estimating regional-scale distribution of earthquake-induced landslides and their associated hazards immediately after an earthquake.

关键词： Wenchuan earthquake earthquake-induced landslide evaluation model Arias intensity earthquake intensity

Xylooligosaccharide attenuates lipopolysaccharide-induced intestinal injury in piglets via suppressing inflammation and modulating cecal microbial communities

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Animal Nutrition 2021年第3期7卷 609-620页

作者： xiuying wang Kan Xiao Cheng Yu Longmei wang Tianzeng Liang Huiling Zhu Xiao Xu Yulan Liu Hubei Key Laboratory of Animal Nutrition and Feed Science Hubei Collaborative Innovation Center for Animal Nutrition and Feed SafetyWuhan Polytechnic UniversityWuhan430023China College of Life Sciences South-Central University for NationalitiesWuhan430023China

Xylooligosaccharide(XOS)has been considered to be an effective prebiotic,but its exact mechanisms remain *** research was conducted to evaluate the effects of XOS on pig intestinal bacterial community and mucosal barrier using a lipopolysaccharide(LPS)-caused gut damage ***-four weaned pigs were assigned to 4 treatments in a 2×2 factorial design involving diet(with or without XOS)and immunological challenge(saline or LPS).After 21 d of feeding 0%or 0.02%commercial XOS product,piglets were treated with saline or *** that,blood,small intestinal mucosa and cecal digesta were *** XOS enhanced intestinal mucosal integrity demonstrated by higher villus height,villus height-to-crypt depth ratio,disaccharidase activities and claudin-1 protein expression and lower crypt *** also caused down-regulation of the gene expression of toll-like receptor 4 and nucleotide-binding oligomerization domain protein signaling,accompanied with decreased pro-inflammatory cytokines and cyclooxygenase 2 contents or mRNA expression and increased heat shock protein 70 mRNA and protein ***,increased Bacteroidetes and decreased Firmicutes relative abundance were observed in the piglets fed with *** the genus level,XOS enriched the relative abundance of beneficial bacteria,e.g.,Faecalibacterium,Lactobacillus,and ***,XOS enhanced short chain fatty acids contents and inhibited histone *** correlation analysis of the combined datasets implied some potential connections between the intestinal microbiota and pro-inflammatory cytokines or cecal *** results suggest that XOS inhibits inflam-matory response and beneficially modifies microbes and metabolites of the hindgut to protect the in-testine from inflammation-related injury.

关键词： Xylooligosaccharide Piglet Lipopolysaccharide Inflammation Intestinal microbiota

Robust adaptive fuzzy tracking control for a class of strict-feedback nonlinear systems based on backstepping technique

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控制理论与应用（英文版） 2007年第3期5卷 317-322页

作者： Min wang xiuying wang Bing CHEN Shaocheng TONG Institute of Complexity Science Qingdao University Qingdao Shandong 266071 China College of Information Science and Technology Qingdao University of Science and Technology Qingdao Shandong 266071 China Department of Basic Science Liaoning Institute of Technology Jinzhou Liaoning 121001 China

In this paper, the robust adaptive fuzzy tracking control problem is discussed for a class of perturbed strict-feedback nonlinear systems. The fuzzy logic systems in Mamdani type are used to approximate unknown nonlinear functions. A design scheme of the robust adaptive fuzzy controller is proposed by use of the backstepping technique. The proposed controller guarantees semi-global uniform ultimate boundedness of all the signals in the derived closed-loop system and achieves the good tracking performance. The possible controller singularity problem which may occur in some existing adaptive control schemes with feedback linearization techniques can be avoided. In addition, the number of the on-line adaptive parameters is not more than the order of the designed system. Finally, two simulation examples are used to demonstrate the effectiveness of the proposed control scheme.

关键词： Nonlinear systems Fuzzy control Robust adaptive control Backstepping technique

On Application of Big Data Mining in Earthquake Precursor Observation

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Earthquake Research in China 2015年第4期29卷 452-458页

作者： wang xiuying Zhang Ling Zhang Congcong Institute of Crustal Dynamics China Earthquake Administration Earthquake Administration of Shandong Province

Research and application of big data mining,at present,is a hot issue. This paper briefly introduces the basic ideas of big data research, analyses the necessity of big data application in earthquake precursor observation,and probes certain issues and solutions when applying this technology to work in the seismic-related domain. By doing so,we hope it can promote the innovative use of big data in earthquake precursor observation data analysis.

关键词： Big data Earthquake precursor observation data hidden information Data mining Seismic-related research application

Stability validation on the VLF waveform data of the China-Seismo-Electromagnetic Satellite

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Science China(Technological Sciences) 2022年第12期65卷 3069-3078页

作者： YANG DeHe ZHIMA ZeRen wang Qiao HUANG JianPing wang xiuying ZHANG ZhenXia ZHAO ShuFan GUO Feng CHENG WanLi LU HengXin SHEN XuHui National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing 100085China Henan Earthquake Agency Zhengzhou 450016China

The China-Seismo-Electromagnetic Satellite(CSES),which was launched in February 2018,carries the search coil magnetometer(SCM)and the electric field detector(EFD)to realize the high-resolution electromagnetic field and wave detection in the upper *** to the complexity and variability of the ionospheric environment,the stability of such a high sampling rate and high-precision electromagnetic field detection systems is always an essential link in data processing and the scientific application of *** work evaluates the stability of the very-low-frequency(VLF)band detection by validating the systemic sampling-time differences between SCM and EFD in the VLF burst-mode *** optimal waveform data preprocessing method is put forward according to the noise levels of the VLF burst-mode observation and the inherent design characteristics of *** VLF waveform data of EFD is rebuilt by filling the data gaps among the sampling sub-periods,making it with a similar sample length to *** by precisely intercepting the maximum and minimum values of the burst-mode waveforms,the variation of the sampling-time difference between EFD and SCM is statistically *** show that during the three years'operation,the sampling-time difference between EFD and SCM predominately keeps below 0.5 s,indicating good stability of EFD and SCM on *** we developed an automatic synchronization tool based on the similarity function and STA/LTA(short time average over long time average)characteristic *** tool can effectively realize the precise synchronization between SCM and EFD in the VLF burst-mode *** work is helpful to upgrade the data quality of CSES and provides technical support for electromagnetic wave propagation studies.

关键词： stability CSES EFD SCM sampling-time difference quasiperiodic waves

Ag nanoparticles deposited on oxygen-vacancy-containing BiVO_4 for enhanced near-infrared photocatalytic activity

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Chinese Journal of Catalysis 2018年第1期39卷 128-137页

作者： Chunjing Shi Xiaoli Dong xiuying wang Hongchao Ma Xiufang Zhang School of Light Industry and Chemical Engineering Dalian Polytechnic University Dalian 116034 Liaoning China

This study investigates the photodegradation of the organic dye rhodamine B by Ag‐nanoparticlecontaining BiVO4catalysts under different irradiation *** catalysts consist of Ag nanoparticles deposited on oxygen‐vacancy‐containing *** morphology of the BiVO4is olive shaped,and it has a uniform size *** BiVO4possesses a high oxygen vacancy density,and the resulting Ag nanoparticle‐BiVO4catalyst exhibits higher photocatalytic activity than *** RhB degradation by the Ag nanoparticle‐BiVO4catalyst is99%after100min of simulated solar ***4containing oxygen vacancies as a rationally designed support extends the catalyst response into the near‐infrared region,and facilitates the trapping and transfer of plasmonic hot *** enhanced photocatalytic efficiency is attributed to charge transfer from the BiVO4to Ag nanoparticles,and surface plasmon resonance of the Ag *** insights into electron‐hole separation and charge transfer may arouse interest in solar‐driven wastewater treatment and water splitting.?2018,Dalian Institute of Chemical Physics,Chinese Academy of *** by Elsevier *** rights reserved.

关键词： Bismuth vanadate Oxygen vacancy Silver nanoparticle Surface plasmon resonance Solar‐driven