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Application of hydrochemistry and strontium isotope for understanding the hydrochemical characteristics and genesis of strontium-rich groundwater in karst area,Gongcheng County,Southwest China

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Journal of Groundwater Science and Engineering 2024年第3期12卷 264-280页

作者： Mi Tang Jun lv Shi Yu yan Liu Shao-hong You ping-ping Jiang College of Environmental Science and Engineering Guilin University of TechnologyGuilin 541004GuangxiChina Guangxi Zhuang Autonomous Region Hydrographic Centre Nanning 530023China Technical Innovation Center of Mine Geological Environmental Restoration Engineering in Southern Karst Area Ministry of Natural ResourcesNanning 530028China Key Laboratory of Karst Dynamics Ministry of Natural Resources&Guangxi Zhuang Autonomous RegionInstitute of Karst GeologyChinese Academy of Geological SciencesGuilin 541004GuangxiChina International Research Centre on Karst under the Auspices of UNESCO/National Center for International Research on Karst Dynamic System and Global Change Guilin 541004GuangxiChina Guilin Research Institute of Environmental Protection Sciences Guilin 541004GuangxiChina Guangxi Key Laboratory of Green Preparation and Application of Inorganic Materiais Laibin 546199GuangxiChina College of Earth Sciences Guilin University of TechnologyGuilin 541004GuangxiChin

Understanding the hydrochemical characteristics and genesis mechanisms of strontium-rich groundwater is pivotal for supporting the exploitation and utilization of natural strontium-rich *** this research,27 groundwater samples were *** analyzing major ion chemistry and strontium isotope data,and considering the hydrogeological context,various analytical approaches,including multivariate statistics,ion ratios,and isotopes,were used to reveal the characteristics and genesis mechanisms of strontium-rich groundwater in the study *** findings indicate that the predominant hydrochemical type of groundwater is HCO_(3)-Ca,with Ca^(2+)and HCO_(3)^(-)as the primary cations and *** hydrochemistry of the strontium-rich groundwater is predominantly influenced by rock weathering processes.A combination of factors,including ion exchange,and anthropogenic activities,shapes the compositional characteristics of the groundwater in the *** dissolution of calcite due to weathering emerges as the principal source of strontium in the *** ion exchange processes are not conducive to strontium enrichment in groundwater,their effect is relatively *** impact of human activities on the groundwater is minor.

关键词： Hydrochemistry analysis Strontium ^(87)Sr/^(86)Sr Groundwater Karst

Harmonic Moments of Branching Processes in Random Environments

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Acta Mathematica Sinica,English Series 2009年第7期25卷 1087-1096页

作者： Wei Gang WANG ping lv Di He HU School of Statistics and Mathematics Zhejiang Gongshang University Hangzhou 310018 P. R. China Department of Science Hangzhou Normal University Hangzhou 310036 P. R. China School of Mathematics and Statistics Wuhan University Wuhan 430072 P. R. China

We consider harmonic moments of branching processes in general random environments. For a sequence of square integrable random variables, we give some conditions such that there is a positive constant c that every var... 详细信息

关键词： branching processes in random environments harmonic moments

Domain-Oriented Software Defined Computing Architecture

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China Communications 2019年第6期16卷 162-172页

作者： ping lv Qinrang Liu Hongchang Chen Ting Chen National Digital Switching System Engineering and Technical R&D Center

With the introduction of software defined hardware by DARPA Electronics Resurgence Initiative,software definition will be the basic attribute of information *** from boundary certainty and algorithm aggregation of domain applications,domain-oriented computing architecture has become the technical direction that considers the high flexibility and efficiency of information *** at the characteristics of data-intensive computing in different scenarios such as Internet of Things(IoT),big data,artificial intelligence(AI),this paper presents a domain-oriented software defined computing architecture,discusses the hierarchical interconnection structure,hybrid granularity computing element and its computational kernel extraction method,finally proves the flexibility and high efficiency of this architecture by experimental comparison.

关键词： software defined hardware software defined computing architecture hierarchical interconnection mixed-granular computing element

Reversal of multi-drug resistance by pSUPER-shRNA-mdr1 in vivo and in vitro

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World Journal of Gastroenterology 2009年第4期15卷 431-440页

作者： Guang-Dong Pan Jian-Qing yang lv-Nan yan Guang-ping Chu Qiang Liu Yi Xiao Lin Yuan Department of General Surgery People's Hospital of Liuzhou Medical Universityof Guangxi Liuzhou 545001 Guangxi Zhuang Autonomous Region China

AIM： To explore the possibility of reversing multi-drug resistance （MDR） to HepG2/mdr1 in vitro and in vivo with RNA interference （RNAi）. METHODS： HepG2/mdr1 was obtained by cloning the whole gene mdrl into HepG2 cells, shRNA targeting sequence was designed to be homologous to the P-gp encoding MDR1 mRNA consensus sequence, pSUPER- shRNA/mdrl was constructed using the enzyme- digested technique. HepG2/mdrl cells were transfected with vectors of pSUPER-shRNA/mdrl to measure their efficacy by real-time PCR for mdrl mRNA, flow cytometry （FCM） for P-gp expression, and Rhodamine efflux, MTT method for HepG2/mdrl function, respectively. In vivo, mice tumors were treated by injecting pSUPER-shRNA/mdrl in situ and into intra- abdominal cavity. Tumors were collected to create cell suspension and cryosections after chemothearpy with adiramycin and mytomycin. The cell suspension was incubated in RPMI-1640 supplemented with G418 to screen stable cells for appreciating the reversal of MDR. Cryosections were treated with immunohistochemistry technique to show the effectiveness of transfection and the expression of ***： pSUPER-shRNA/mdrl was successfully constructed, which was confirmed by sequencing. The MDR phenotype of HepG2/mdr1 was decreased significantly in vitro transfection. HepG2/mdr1 showing its MDR was reversed notably in P-gp expression （11.0% vs 98.2%, P 〈 0.01）. Real-time PCR showed that mRNA/mdrl was lower in test groups than in control groups （18.73± 1.33 vs 68.03±2.21, P 〈 0.001）. Compared with HepG2, the sensitivity of HepG2/ mdrl and HepG2/mdr1-dsRNA cells to ADM was decreased by 1.64 times and 15.6 times, respectively. The accumulation of DNR in positive groups was decreased evidently. In vivo, the p-gp expression in positive groups was significantly lower than that in control groups （65.1% vs 94.1%, P 〈 0.05）. The tumor suppressing rate in test groups was 57.8%. After chemotherapy, the growth rate in test groups was lower than that in control groups （

关键词： Hepatocellular carcinoma Multi-drugresistance RNA interference

Numerical simulation and experiment validation on lightning-induced effects of a special vehicle

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The Journal of China Universities of Posts and Telecommunications 2016年第3期23卷 76-88页

作者： Zhou ping lv Yinghua Tao Yong Xu Hongping School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 China Institute of Astronautic System Engineering Beijing 100076 China

In recent years, with the development of the system integration technology, the outside integrative special vehicles, such as big oil tank, trucks loading with dangerous goods and so on, are becoming more and more important. When the vehicle is under way, it will inevitably encounter the nature environment, including lightning. If the lightning strikes directly or very close to the vehicle, the lightning-induced effects will be very destructive. Therefore, for a better understanding of the lightning-induced effects produced on the special vehicle by the lightning strike, the research on lightning-induced effects of a special vehicle for aerospace system transportation was proposed. In the paper, a numerical simulation model for the special vehicle is established, the lightning-induced effects are analyzed successfully by using ***-line matrix （TLM） algorithm, and the experiment validation example is also implemented. By comparing the numerical simulation with the actual experiment results, the correctness trend of the numerical simulation is validated and a mass of invaluable research data is obtained, which has a deep significance on the lightning research in our country.

关键词： special vehicle lighming-induced effects numerical simulation experiment validation

Integrative SMRT sequencing and ginsenoside profiling analysis provide insights into the biosynthesis of ginsenoside in Panax quinquefolium

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Chinese Journal of Natural Medicines 2022年第8期20卷 614-626页

作者： DI Peng yan yan WANG ping yan Min WANG Ying-ping HUANG Lu-Qi State Key Laboratory Breeding Base of Dao-Di Herbs National Resource Center for Chinese Materia MedicaChina Academy of Chinese Medical SciencesBeijing 100700China Center for Post-doctoral Research China Academy of Chinese Medical SciencesBeijing 100700China State Local Joint Engineering Research Center of Ginseng Breeding and Application Jilin Agricultural UniversityChangchun 130118China

Panax quinquefolium is one of the most common medicinal plants *** are the major pharmaceutical components in *** biosynthesis of ginsenosides in different tissues of *** remained largely *** the current study,an integrative method of transcriptome and metabolome analysis was used to elucidate the ginsenosides biosynthesis pathways in different tissues of ***,22 ginsenosides in roots,leaves,and flower buds showed uneven distribution patterns.A comprehensive *** transcriptome was generated through single molecular real-time(SMRT)and second-generation sequencing(NGS)technologies,which revealed the ginsenoside pathway genes and UDP-glycosyltransferases(UGT)family genes explicitly expressed in roots,leaves,and flower *** weighted gene co-expression network analysis(WGCNA)of ginsenoside biosynthesis genes,UGT genes and ginsenoside contents indicated that three UGT genes were positively correlated to pseudoginsenoside F11,notoginsenoside R1,notoginsenoside R2 and pseudoginsenoside *** results provide insights into ginsenoside biosynthesis in different tissues ***.

关键词： Panax quinquefolium SMRT sequencing Ginsenoside biosynthesis UDP-glycosyltransferases

Aeolian transport over a developing transverse dune

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Journal of Arid Land 2014年第3期6卷 243-254页

作者： ZhiBao DONG ping lv ZhengCai ZHANG JunFeng LU Key Laboratory of Desert and Desertification Cold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of Sciences

The spatial and temporal changes in aeolian transport over a dune are fundamental factors that control the morphology of the dune. In the present study, we obtained direct field observations of aeolian transport over a developing transverse dune at the Shapotou Aeolian Experiment Site in the southeastern part of China＇s Tengger Desert. The transport rate versus wind speed relationship relationships over flat surfaces and over dunes that are s complicated over a developing dune compared with the n equilibrium with the wind. We obtained trend lines for transport rate over the transverse dune versus distance. The transport rate generally increased from the toe to the crest above the stoss slope, but the difference in transport rate between the crest and the toe was smaller than those that have been proposed for taller dunes. The crest/toe ratio for transport rates therefore seems to depend greatly on dune height. Flux density profiles for different points above the dune at different wind speeds were well described by the exponential decay law, as has been proposed for saltation flux density profiles. Coefficients in the flux density profile function can be defined in terms of the transport rate and wind speed. However, the dependence of relative decay rate with height and average saltation height on wind speed was weaker than that observed in a wind tunnel and above a fiat surface. The preliminary results obtained in this study require more evidence from field observations to fully describe aeolian transport above developing dunes.

关键词： aeolian transport aeolian geomorphology dune dynamics

Toward a seamless adaptation platform for Internetware

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Science China(Information Sciences) 2013年第8期56卷 41-53页

作者： CAO Chun YU ping HU Hao lv Jian State Key Laboratory for Novel Software Technology Nanjing University Department of Computer Science and Technology Nanjing University

Internetware applications must adapt themselves to keep their satisfaction with sufficient functionality,performance and *** this paper,we introduce a comprehensive technical platform to support such *** and low disruptive software updating techniques for multi-grained abstractions,namely objects,processes/workflows,components and coordinated systems,are proposed toward a seamless adaptation *** platform integrates all the techniques organically to support the practical adaptation scenarios that need the synergy of multiple *** implement the platform in accordance with industrial standards with its feasibility and efficiency demonstrated and hope the platform can be a stepping stone for future technical research for the Internetware paradigm.

关键词： Internetware seamless adaptation dynamic software update process migration component reconfiguration

System-Level EMC Assessment for Military Vehicular Communication Systems Based on a Modified Four-Level Assessment Model

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China Communications 2018年第8期15卷 39-53页

作者： ping Zhou Yinghua lv Zhihong Chen Hongping Xu School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing Institute of Astronautic System Engineering China Academy of Launch Vehicle Technology

With the development of EMC technology, EMC assessment has become increasingly important in EMC design. Although numerous EMC assessment models are available today, few of them can provide a tradeoff between efficiency and accuracy for the specific case of military vehicular communication systems. Face to this situation, a modified four-level assessment model is proposed in the paper. First, the development of EMC assessment technology is briefly reviewed, and the theoretical mechanism of EMI environment is introduced. Then, the architecture of the proposed model is outlined, and the assessment methods are explored. To demonstrate the application of it, an example involving a communication system in a military vehicle is presented. From the physical layer to the signal layer, a hierarchical assessment on the entire system is successfully performed based on the proposed model, and we can make a qualitative EMC assessment on the EMC performance of the system. Based on a comparison with the traditional model, we conclude that the proposed model is more accurate, more efficient and less time-consuming, which is suitable for the EMC assessment on militaryvehicular communication systems. We hope that the proposed model will serve as a useful reference for system-level EMC assessments for other systems.

关键词： military vehicular communication system system-level electromagnetic compatibility (EMC) assessment four-level assessment model