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A Study of the Structural Evolution and Strength Damage Mechanisms of PishaSandstone Cement Soil Modified with Fly Ash

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Journal of Renewable Materials 2021年第12期9卷 2241-2260页

作者： Jian Yang xiaoli li Hui Wang Kaiqiang Geng College of Water Conservancy and Civil Engineering Inner Mongolia Agricultural UniversityHohhot010018China

In the present study,in order to investigate the effects of fly ash on the structural evolution and strength damage mechanism of Pisha-sandstone cement soil,unconfined compressive strength tests of Pisha-sandstone cement soil with different fly ash content levels and various ages were carried *** apparent morphology,microstructures,and chemical compositions of the samples were observed and analyzed using ultra-depth three-dimensional microscopy,scanning electron microscopy,and XRD *** results revealed that the unconfined compressive strength levels of Pisha-sandstone cement soil samples displayed increasing trends with the increases in fly ash content and *** example,when the fly ash content levels were increased from 12%to 15%,the strength of Pisha-sandstone cement soil had only slightly increased under the curing ages of 7,28,and 60 *** addition,the unconfined compressive strength levels of the samples with 15%fly ash content only increased 0.02%,0.51%,and 0.54%,respectively,when compared with the samples containing 12%fly *** was observed that with the increases in the fly ash content,the number of pores on the outer surfaces of the samples were significantly ***,the height differences of cross-sectional gullies were reduced,and the apparent morphology was observed to be *** cement hydration creates a strong alkaline environment for reaction systems,the active degrees of the pozzolanic reactions of the fly ash were stimulated in this ***,a significant amount of the C-S-H gel phase and the stable five-membered ring structure of the mordenite and ettringite were generated,which connected the loose Pisha-sandstone particles to form a *** internal microstructures were then observed to be denser and more *** the same time,the micro-pores were filled and refined by the unreacted micro-bead fly ***,the defects in the internal microstructures were ***,based on the Weibull distribu

关键词： Pisha-sandstone fly ash strength performance microstructure damage variable damage evolution model

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Application of microprobe-based flank method analysis of Fe^3＋ in garnet ofNorth Qilian eclogite and its geological implication

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Science Bulletin 2018年第5期63卷 300-305页

作者： xiaoli li Shuguang Song lifei Zhang E. Heidi Hofer The Key Laboratory of Orogenic Belts and Crustal Evolution MOE School of Earth and Space Sciences Peking University Beijing 100871 China Institut fur Geowissenschaften Facheinheit Mineralogie Johann Wolfgang Goethe-Universitat D-60054 Germany

A newly developed microprobe-based methodology(the Flank Method)for Fe^(3+)/RFe quantification has been successfully applied to some natural garnets from the North Qilian eclogites by JEOL JXA-8100microprobe at Peking *** results demonstrated an obvious discrepancy in comparison with the outcomes by conventional stoichiometric *** methodology allows to measure theFe^(3+)/Rmeasurement of Fe^(3+)According to the compositional zonation displayed in the studied eclogitic garnets from North Qilian,a prograde metamorphic°C to 22 kbar,600°C was *** interestingly,the measured Fe^(3+)/RFe ratios in garnets decreasing from core to rim may probably imply that the oxygen fugacity(f O_2)declines with the depth of the subduction zone.

关键词： Microprobe Flank method Ferric iron GarnetNorth Qilian eclogite

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Research on optimal intelligent routing algorithm for IoV with machine learning and smart contract

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Digital Communications and Networks 2023年第1期9卷 47-55页

作者： Baofeng Ji Mingkun Zhang ling Xing xiaoli li Chunguo li Congzheng Han Hong Wen Henan University of Science and Technology College of Information EngineeringLuoyang471000China The Institute of Atmospheric Physics Chinese Academy of Sciences(LAGEO)Beijing100029China Longmen Laboratory Luoyang471000China Chinese Academy of Agricultural Mechanization Sciences Beijing100000China University of Bristol BristolBS00UK University of Electronic Science and Technology of China Chengdu610000China

The huge increase in the communication network rate has made the application fields and scenarios for vehicular ad hoc networks more abundant and diversified and proposed more requirements for the efficiency and quality of data *** improve the limited communication distance and poor communication quality of the Internet of Vehicles(IoV),an optimal intelligent routing algorithm is proposed in this *** multiweight decision algorithm with the greedy perimeter stateless routing protocol,designed and evaluated standardized function for link *** additive weighting is used to optimize link stability and distance to improve the packet delivery rate of the *** blockchain system is used as the storage structure for relay data,and the smart contract incentive algorithm based on machine learning is used to encourage relay vehicles to provide more communication bandwidth for data packet *** proposed scheme is simulated and analyzed under different scenarios and different *** experimental results demonstrate that the proposed scheme can effectively reduce the packet loss rate and improve system performance.

关键词： IoV Machine learning Smart contract Routing algorithm GPSR Relay transmission

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Evidence of constraint in the 3D genome for trans-splicing in human cells

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Science China(life Sciences) 2020年第9期63卷 1380-1393页

作者： Cong liu Yiqun Zhang xiaoli li Yan Jia Feifei li Jing li Zhihua Zhang CAS Key Laboratory of Genome Sciences and Information Beijing Institute of Genomicsand China National Center for BioinformationChinese Academy of SciencesBeijing 100101China School of life Science University of Chinese Academy of SciencesBeijing 100049China

Fusion transcripts are commonly found in eukaryotes, and many aberrant fusions are associated with severe diseases, including cancer. One class of fusion transcripts is generated by joining separate transcripts through trans-splicing. However, the mechanism of trans-splicing in mammals remains largely elusive. Here we showed evidence to support an intuitive hypothesis that attributes trans-splicing to the spatial proximity between premature transcripts. A novel trans-splicing detection tool(TSD) was developed to reliably identify intra-chromosomal trans-splicing events(i TSEs) from RNA-seq data. TSD can maintain a remarkable balance between sensitivity and accuracy, thus distinguishing it from most state-of-the-art tools. The accuracy of TSD was experimentally demonstrated by excluding potential false discovery from mosaic genome or template switching during PCR. We showed that i TSEs identified by TSD were frequently found between genomic regulatory elements, which are known to be more prone to interact with each other. Moreover, i TSE sites may be more physically adjacent to each other than random control in the tested human lymphoblastoid cell line according to Hi-C data. Our results suggest that trans-splicing and 3 D genome architecture may be coupled in mammals and that our pipeline, TSD, may facilitate investigations of trans-splicing on a systematic and accurate level previously thought impossible.

关键词： trans-splicing chromatin interaction 3D genome spatial clustering

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1.9 Ga eclogite from the Archean-Paleoproterozoic Belomorian Province, Russia

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Science Bulletin 2017年第4期62卷 239-241页

作者： xiaoli li Huanglu Yu lifei Zhang Chunjing Wei Thomas Bader The Key Laboratory of Orogenic Belts and Crustal Evolution MOE School of Earth and Space Sciences Peking University Beijing 100871 China

The first Archean eclogite was announced from the Salma and Gridino complexes of Belomorian Province(Russia)in Fennoscandian Shield(Fig.1a)[1]that has aroused quite a resonance worldwide from all aspects;the debates on the actual age of the Belomorian eclogites have never stopped ever since and in all there are three scenarios are suggested(1)one time in Mesoarchean,(2)two times in Neoarchean and Paleoproterozoic and(3)one time

关键词：古元古代榴辉岩太古宙俄罗斯 GA 世界范围新太古代

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Microstructure and magnetic properties of FePt/MgO multilayers deposited by RF magnetron sputtering

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Journal of University of Science and Technology Beijing 2008年第2期15卷 173-177页

作者： xiaoli li Fang Wang Fengxian Jiang Xiaohong Xu Haishun Wu School of Chemistry and Materials Science Shanxi Normal University Linfen 041004 China College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan 030024 China

FePt （50 nm） and [FePt（a nm）/MgO（b nm）5/glass （a=1, 2, 3; b=1, 2, 3） films were prepared by radio frequency （RF） magnetron sputtering technique, and then were annealed at 600℃ for 30 min. The effect of MgO layer thickness on the structures and magnetic properties of the FePt/MgO multilayers was investigated. The coercivities and inter-grain interactions of the FePt/MgO films were decreased, yet the degree of （001） texturing drastically increased with the increase in MgO layer thickness when the FePt layer thickness was fixed. Thus, the FePt/MgO films with appropriate coercivities, high perpendicular anisotropy, and weak intergrain interactions were obtained by controlling the MgO layer thickness. Overall, these results indicate that the FePt/MgO nanostructured films are promising candidates for future high-density perpendicular recording media.

关键词： FePt/MgO multilayer coercivity perpendicular anisotropy inter-grain interaction

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A Dynamic Hysteresis Model of Piezoelectric Ceramic Actuators

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Chinese Journal of Electronics 2023年第6期32卷 1278-1285页

作者： DONG Ruili TAN Yonghong XIE Yingjie li xiaoli College of Information Science and Technology Donghua University College of Information Mechanicaland Electrical Engineering Shanghai Normal University Shanghai Pudong Development Bank

A modified Prandtl-Ishlinskii(PI) model with rate-dependent thresholds for describing the hysteresis characteristics of piezoelectric actuators is *** on the classical PI model, a novel threshold depending on the input rate is constructed. With the novel rate-dependent threshold, the play operator has the capability to track the frequency variation of the input signal. Hence, the proposed modified PI model can be used to depict the rate-dependent hysteresis of piezoelectric actuators. Experimental results are presented to illustrate the model validation results of the proposed modeling.

关键词： Piezoelectric actuators Ceramics Hysteresis

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Distributed cooperative formation of multiple mobile agents with preserved connectivity

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Frontiers of Electrical and Electronic Engineering in China 2009年第4期4卷 397-408页

作者： xiaoli li Yugeng XI Department of Automation Shanghai Jiao Tong UniversityShanghai 200240China

This paper investigates distributed cooperative formation control of a group of multiple mobile agents with a virtual leader,where information exchange among agents is modeled by the group topology,and the states of the virtual leader are known only by parts of the *** develop a class of distributed formation control laws with similar *** steered group is proved to achieve the desired formation objectives as long as the intersection of the initial communication topology and the formation goal topology is *** requirement of connectivity can be easily achieved by many practical applications;consequently,our developed distributed control laws are effective and ***,for the developed control laws,we show the influence of different information flow graph of agents on the convergence rate and robustness to node and connection failures.

关键词： distributed cooperative control formation connectivity stability LaSalle’s invariance principle

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Analysis of entropies based on empirical mode decomposition in amnesic mild cognitive impairment of diabetes mellitus

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Journal of Innovative Optical Health Sciences 2015年第5期8卷 11-30页

作者： Dong Cui Jinhuan Wang Zhijie Bian Qiuli li Lei Wang xiaoli li School of Information Science and Engineering Yanshan University QinhuangdaoP.R.China School of Electrical Engineering Yanshan University QinhuangdaoP.R.China Department of Neurology General Hospital of Second Artillery Corps of PLA Beijing P.R.China State Key Laboratory of Cognitive Neuroscience and Learning&IDG/McGovern Institute for Brain Research Beijing Normal University BeijingP.R.China Center for Collaboration and Innovation in Brain and Learning Sciences Beijing Normal University BeijingP.R.China

EEG characteristics that correlate with the cognitive functions are important in detecting mild cognitive impairment(MCI)in *** investigate the complexity between aMCI group and age-matched non-aMCI control group in T2DM,six entropies combining empirical mode decomposition(EMD),including Approximate entropy(ApEn),Sample entropy(SaEn),Fuzzy entropy(FEn),Permutation entropy(PEn),Power spectrum entropy(PsEn)and Wavelet entropy(WEn)were used in the study.A feature extraction technique based on maximization of the area under the curve(AUC)and a support vector machine(SVM)were subsequently used to for features selection and classi¯***,Pearson's linear correlation was employed to study associations between these entropies and cognitive *** to other entropies,FEn had a higher classification accuracy,sensitivity and specificity of 68%,67.1% and 71.9%,*** 43 salient features achieved classification accuracy,sensitivity and speci¯city of 73.8%,72.3% and 77.9%,respectively.P4,T4 and C4 were the highest ranking salient *** analysis showed that FEn based on EMD was positively correlated to memory at electrodes F7,F8 and P4,and PsEn based on EMD was positively correlated to Montreal cognitive assessment(MoCA)and memory at electrode *** sum,FEn based on EMD in righttemporal and occipital regions may be more suitable for early diagnosis of the MCI with T2DM.

关键词： Entropy empirical mode decomposition amnestic mild cognitive impairment type 2 diabetes mellitus

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Position Encoding Based Convolutional Neural Networks for Machine Remaining Useful life Prediction

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IEEE/CAA Journal of Automatica Sinica 2022年第8期9卷 1427-1439页

作者： Ruibing Jin Min Wu Keyu Wu Kaizhou Gao Zhenghua Chen xiaoli li Institute for Infocomm Research Agency for ScienceTechnology and Research(A*STAR)Singapore 138632Singapore School of Computer Science Liaocheng UniversityLiaocheng 252000 Macao Institute of System Engineering Macao University of Science and TechnologyTaipaMacao 999078China

Accurate remaining useful life(RUL)prediction is important in industrial *** prevents machines from working under failure conditions,and ensures that the industrial system works reliably and ***,many deep learning based methods have been proposed to predict *** these methods,recurrent neural network(RNN)based approaches show a strong capability of capturing sequential *** allows RNN based methods to perform better than convolutional neural network(CNN)based approaches on the RUL prediction *** this paper,we question this common paradigm and argue that existing CNN based approaches are not designed according to the classic principles of CNN,which reduces their ***,the capacity of capturing sequential information is highly affected by the receptive field of CNN,which is neglected by existing CNN based *** solve these problems,we propose a series of new CNNs,which show competitive results to RNN based *** with RNN,CNN processes the input signals in parallel so that the temporal sequence is not easily *** alleviate this issue,a position encoding scheme is developed to enhance the sequential information encoded by a ***,our proposed position encoding based CNN called PE-Net is further improved and even performs better than RNN based *** experiments are conducted on the C-MAPSS dataset,where our PE-Net shows state-of-the-art performance.

关键词： Convolutional neural network(CNN) deep learning position encoding remaining useful life prediction

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