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Cryostructures and ground ice content in ice-rich permafrost area of the Qinghai-Tibet Plateau with Computed Tomography Scanning

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Journal of Mountain Science 2021年第5期18卷 1208-1221页

作者： fan xing-wen LIN Zhan-ju GAO Ze-yong meng Xiang-lian NIU Fu-jun LUO Jing YIN Guo-an ZHOU Fu-jun LAN Ai-yu State Key Laboratory of Frozen Soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China China Railway First Survey and Design Institute Group Co. LTD.Xi'an 71004China

Permafrost is an important part of the cryosphere,playing an integral role in the hydrologic cycle,ecology,and influencing human *** of ground ice can drastically change landscapes and associated thaw subsidence may induce instability of *** terrain conditions on the Qinghai-Tibet Plateau are complex,and the spatial distribution of ground ice is highly variable,so knowledge of its abundance and variability is required for impact assessments relating to the degradation of *** study examined 55 permafrost samples from warm,ice-rich permafrost region in Beiluhe Basin,Qinghai-Tibet *** samples were examined using Computed Tomography scanning,and the ice content and cryostructure were *** results indicated that:1)variation in volumetric ice content was considerable(0%-70%),with a mean value of 17%;2)seven cryostructures were identified,including crustal,vein,lenticular,ataxitic,reticulate and layered cryostructure;3)volumetric ice content varied by cryostructure,with the highest associated with layered and ataxitic *** ice contents were lowest for samples with pore and lenticular *** work provides detailed ground ice content and will be helpful for assessing thaw subsidence and infrastructure stability on Qinghai-Tibet Plateau.

关键词： Qinghai-Tibet Plateau Permafrost CT scanning Volumetric ice content Cryostructure

What are the differences in yield formation among two cucumber (Cucumis sativus L.) cultivars and their F1 hybrid?

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Journal of Integrative Agriculture 2020年第7期19卷 1789-1801页

作者： WANG Xiu-juan KANG meng-zhen fan xing-rong YANG Li-li ZHANG Bao-gui HUANG San-wen Philippe DE REFFYE WANG Fei-yue The State Key Laboratory of Management and Control for Cormplex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190P.R.China Bejjing Engineering Research Center of Intelligent Systems and Technology Institute of AutomationChinese Academy of SciencesBejing 100190P.R.China Innovation Center for Parallel Agriculture Qingdao Academy of Intelligent IndustriesQingdao 266109P.R.China School of Computer Science and Information Engineering Chongqing Technology and Business UniversityChongqing 400067P.R.China College of Information and Electrical Engineering China Agricultural UniversityBeijing 100083P.R.China College of Land Science and Technology China Agricultural UniversityBeijing 100193P.R.China Agricultural Genomes Institute at Shenzhen Chinese Academy of Agricultural SciencesShenzhen 518124P.R.China AMAP University MontpellierCIRADCNRSINRAIRDMontpellier 34000France The School of Computer and Control Engineering University of Chinese Academy of SciencesBeijing 100049P.R.China

To elucidate the mechanisms underlying the differences in yield formation among two parents(P1 and P2) and their F1 hybrid of cucumber, biomass production and whole source–sink dynamics were analyzed using a functional–structural plant model(FSPM) that simulates both the number and size of individual organs. Observations of plant development and organ biomass were recorded throughout the growth periods of the plants. The GreenLab Model was used to analyze the differences in fruit setting, organ expansion, biomass production and biomass allocation. The source–sink parameters were estimated from the experimental measurements. Moreover, a particle swarm optimization algorithm(PSO) was applied to analyze whether the fruit setting is related to the source–sink ratio. The results showed that the internal source–sink ratio increased in the vegetative stage and reached a peak until the first fruit setting. The high yield of hybrid F1 is the compound result of both fruit setting and the internal source–sink ratio. The optimization results also revealed that the incremental changes in fruit weight result from the increases in sink strength and proportion of plant biomass allocation for fruits. The model-aided analysis revealed that heterosis is a result of a delicate compromise between fruit setting and fruit sink strength. The organlevel model may provide a computational approach to define the target of breeding by combination with a genetic model.

关键词： cucumber biomass production functional-structural plant model source-sink ratio fruit-setting PSO heterosis

Fusing Supervised and Unsupervised Measures for Attribute Reduction

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Intelligent Automation & Soft Computing 2023年第7期37卷 561-581页

作者： Tianshun xing Jianjun Chen Taihua Xu Yan fan School of Computer Jiangsu University of Science and TechnologyZhenjiangJiangsu212100China

It is well-known that attribute reduction is a crucial action of rough *** significant characteristic of attribute reduction is that it can reduce the dimensions of data with clear semantic ***,the learning performance of attributes in derived reduct is much more *** related measures of rough set dominate the whole process of identifying qualified attributes and deriving reduct,those measures may have a direct impact on the performance of selected attributes in ***,most previous researches about attribute reduction take measures related to either supervised perspective or unsupervised perspective,which are insufficient to identify attributes with superior learning performance,such as stability and *** order to improve the classification stability and classification accuracy of reduct,in this paper,a novel measure is proposed based on the fusion of supervised and unsupervised perspectives:(1)in terms of supervised perspective,approximation quality is helpful in quantitatively characterizing the relationship between attributes and labels;(2)in terms of unsupervised perspective,conditional entropy is helpful in quantitatively describing the internal structure of data *** order to prove the effectiveness of the proposed measure,18 University of CaliforniaIrvine(UCI)datasets and 2 Yale face datasets have been employed in the comparative ***,the experimental results show that the proposed measure does well in selecting attributes which can provide distinguished classification stabilities and classification accuracies.

关键词： Approximation quality attribute reduction conditional entropy neighborhood rough set

Relationship Between Wave Function and Corresponding Wigner Function Studied in Entangled State Representation

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Communications in Theoretical Physics 2008年第5期49卷 1159-1162页

作者： XU xing-Lei LI Hong-Qi fan Hong-Yi Department of Physics Heze University Heze 274015 China Department of Material Science and Engineering University of Science and Technology of China Hefei 230026 China

By using the explicit form of the entangled Wigner operator and the entangled state representation we derive the relationship between wave function and corresponding Wigner function for bipartite entangled systems. Th... 详细信息

关键词： Wigner function entangled state representation IWOP technique

Geant4 analysis and optimization of a double crystal phoswich detector for beta–gamma coincidence detection

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Nuclear Science and Techniques 2018年第4期29卷 92-97页

作者： xing fan Xian-Peng Zhang Geng Tian Chao-Wen Yang Department of Nuclear Engineering and Technology College of Physics Science and Technology Sichuan UniversityChengdu 610064 China Key Laboratory of Radiation Physics and Technology Ministry of Education Sichuan University Chengdu 610064China Northwest Institute of Nuclear Technology Xi’an 710024China

In this study, a novel phoswich detector for beta–gamma coincidence detection is designed. Unlike the triple crystal phoswich detector designed by researchers at the University of Missouri, Columbia, this phoswich detector is of the semi-well type, so it has a higher detection efficiency. The detector consists of BC-400 and NaI:Tl with decay time constants of 2.4 and 230 ns, *** BC-400 scintillator detects beta particles, and the Na I:Tl cell is used for gamma detection. Geant4 simulations of this phoswich detector find that a 2-mm-thick BC-400 scintillator can absorb nearly all of the beta particles whose energies are below 700 keV. Further, for a 2.00-cmthick NaI:Tl crystal, the gamma source peak efficiency for photons ranges from a maximum of nearly 90% at 30 keV to 10% at 1 MeV. The self-absorption effect is also discussed in this paper in order to determine the carrier gas' s influence.

关键词： Geant4 Phoswich detector Beta–gamma coincidence detection Detection efficiency

New Route to Deducing Integration Formulas by Virtue of the IWOP Techniqu~

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Communications in Theoretical Physics 2011年第3期55卷 415-417页

作者： fan Hong-Yi LI Hong-Qi XU xing-Lei Department of Physics Shanghai Jiao Tong University Shanghai 200030 China Department of Physics Heze University Heze 274015 China

We point out a new route to deducing integration formulas, i.e., using the technique of integration within an ordered product （IWOP） of operators we derive some new integration formulas, which seems concise. As a by... 详细信息

关键词： the IWOP technique new integration formulas new operator identities Hermite polynomial

IDSRadar:a real-time visualization framework for IDS alerts

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Science China(Information Sciences) 2013年第8期56卷 216-227页

作者： ZHAO Ying ZHOU fangfang fan XiaoPing LIANG xing LIU YongGang Information Science and Engineering School Central South University Laboratory of Networked Systems Hunan University of Finance & Economics

Intrusion Detection Systems(IDS) is an automated cyber security monitoring system to sense malicious ***,IDS often generates both a considerable number of alerts and false positives in IDS *** visualization allows users to discover and analyze large amounts of information through visual exploration and interaction *** with the aid of visualization,identifying the attack patterns and recognizing the false positives from a great number of alerts are still *** this paper,a novel visualization framework,IDSRadar,is proposed for IDS alerts,which can monitor the network and perceive the overall view of the security situation by using radial graph in *** utilizes five categories of entropy functions to quantitatively analyze the irregular behavioral patterns,and synthesizes interactions,filtering and drill-down to detect the potential *** conclusion,IDSRadar is used to analyze the mini-challenges of the VAST challenge 2011 and 2012.

关键词： visual analytics information visualization cyber security IDS log entropy

Male fecundity prognosis and infertility diagnosis in the era of personalised medicine

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Asian Journal of Andrology 2010年第4期12卷 463-467页

作者： Wen-Bing Zhu xing-Yu Long Li-Qing fan Institute of Reproductive and Stem Cell Engineering Central South University Reproductive and Genetic Hospital of CITIC- Xiangya Central South University Changsha 410078 China

In daily clinical practice, we attempt to classify diseases according to patients＇ symptoms and reference values for certain tests. A minimal evaluation is performed following the diagnostic standard, and the patient is treated according to the diagnosis. In this ＇classification medicine＇ model, a patient＇s individual characteristics are more or less ignored.

关键词： Male fecundity prongosis infertility diagnosi era of personalised medicina

Effects of SO2 on the low temperature selective catalytic reduction of NO by NH3 over CeO2-V2O5-WO3/TiO2 catalysts

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Frontiers of Environmental Science & Engineering 2017年第4期11卷 153-159页

作者： Quanming Liang Jian Li Hong He Wenjun Liang Tiejun Zhang xing fan Key Laboratory of Beijing on Regional Air Pollution Control Beijing University of Technology Beijing 100124 China Beijing Key Laboratory for Green Catalysis and Separation Beijing University of Technology Beijing 100124 China

The CeO2-V2O5-WO3/TiO2 （CeO2-VWT） catalysts were prepared by one-step and two-step impregnation methods. The effects of different loading of CeO2 and different preparation methods on De-NOx activity of catalysts had been investigated. CeO2 helped to improve the De-NOx activity and sulfur resistance. The optimal loading of CeO2 was 3% with the De-NOx efficiency reached 89.9% at 140℃. The results showed that the De-NOx activity of 3% CeO2-VWT catalysts by one-step method was the same as two-step method basically and reached the level of industrial applications, the N2 selectivity of catalysts was more than 99.2% between 110℃ and 320℃. In addition, CeO2 promoted the oxidation of NO to NO2, which adsorbed on the Lewis acid site （V5＋-O） to form V5＋-NO3 and inspired the fast SCR reaction. Not only the thermal stability but also the De-NOx activity of catalysts decreased with excess CeO2 competed with V2O5. Characterizations of catalysts were carried out by XRF, BET, XRD, TG and FT-IR. BET showed that the specific surface area of catalysts decreased with the loading of CeO2 increased, the active components content and specific surface area of catalysts decreased slightly after entering SO2. Ammonium sulfate species were formed in poisoned catalyst which had been investigated by XRF, BET, TG and FT-IR. The largest loss rate of weight fraction was 0.024%.℃-1 at 380℃ 390℃, which was in accordance with the decomposition temperature of NH4HSO4 and （NH4）2SO4,

关键词： Low temperature SCR De-NOx activity Sulfur resistance Ammonium sulfate