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A Novel Hybrid Intelligent Prediction Model for Valley Deformation: A Case Study in Xiluodu Reservoir Region, China

Computers, Materials & Continua 2021年第1期66卷 1057-1074页

作者： mengcheng Sun Weiya Xu Huanling Wang Qingxiang meng Long Yan Wei-Chau Xie Research Institute of Geotechnical Engineering Hohai UniversityNanjing210098China Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai UniversityNanjing210098China Key Laboratory of Coastal Disaster and Defense Ministry of EducationHohai UniversityNanjing210098China Department of Civil and Environmental Engineering University of WaterlooWaterlooN2L 3G1Canada

The narrowing deformation of reservoir valley during the initial operation period threatens the long-term safety of the dam,and an accurate prediction of valley deformation(VD)remains a challenging part of risk *** order to enhance the accuracy of VD prediction,a novel hybrid model combining Ensemble empirical mode decomposition based interval threshold denoising(EEMD-ITD),Differential evolutions—Shuffled frog leaping algorithm(DE-SFLA)and Least squares support vector machine(LSSVM)is *** non-stationary VD series is firstly decomposed into several stationary subseries by EEMD;then,ITD is applied for redundant information denoising on special sub-series,and the denoised deformation is divided into the trend and periodic deformation ***,several relevant triggering factors affecting the VD are considered,from which the input features are extracted by Grey relational analysis(GRA).After that,DE-SFLA-LSSVM is separately performed to predict the trend and periodic deformation with the optimal ***,the two individual forecast components are reconstructed to obtain the final predicted *** VD series monitored in Xiluodu reservoir region are utilized to verify the proposed *** results demonstrate that:(1)Compared with Discrete wavelet transform(DWT),better denoising performance can be achieved by EEMD-ITD;(2)Using GRA to screen the optimal input features can effectively quantify the deformation response relationship to the triggering factors,and reduce the model complexity;(3)The proposed hybrid model in this study displays superior performance on some compared models(e.g.,LSSVM,Backward Propagation neural network(BPNN),and DE-SFLA-BPNN)in terms of forecast accuracy.

关键词： Valley deformation prediction multiple triggering factors DE-SFLALSSVM EEMD-ITD Xiluodu hydropower station

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Superconductivity near the(2+1)-Dimensional Ferromagnetic Quantum Critical Point

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Chinese Physics Letters 2022年第9期39卷 47-52页

作者： Yunchao Hao Gaopei Pan Kai Sun Zi Yang meng Yang Qi State Key Laboratory of Surface Physics and Department of Physics Fudan UniversityShanghai 200433China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China Department of Physics University of MichiganAnn ArborMI 48109USA Department of Physics and HKU-UCAS Joint Institute of Theoretical and Computational Physics The University of Hong KongPokfulam RoadHong KongChina Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China

We utilize both analytical and numerical methods to study the superconducting transition temperature Tnear a fermionic quantum critical point(QCP) using a model constructed by Xu et al. [Phys. Rev. X 7, 031059(2017)] as an example. In this model, the bosonic critical fluctuation plays the role of pairing glue for the Cooper pairs, and we use a Bardeen–Cooper–Schrieffer-type mean-field theory to estimate T. We further argue that the Tc computed from the BCS theory approximates a pseudogap temperature TPG, instead of the Berezinskii–Kosterlitz–Thouless transition temperature T, which is confirmed by our determinant quantum Monte Carlo simulation. Moreover, due to the fact that electron density of state starts to deplete at T, the critical scaling of the underlying QCP is also affected below TPG. Thus, when studying the critical behavior of fermionic QCPs, we need to monitor that the temperature is above TPG instead of T. This was often ignored in previous studies.

关键词： critical quantum utilize

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Quantum simulation of lattice gauge theories on superconducting circuits:Quantum phase transition and quench dynamics

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Chinese Physics B 2022年第2期31卷 217-222页

作者： Zi-Yong Ge Rui-Zhen Huang Zi-Yang meng Heng Fan Beijing Nntional Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China Kuvli Institute for Theoretical Sciences University of Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China Department of Physics and HKU-UCAS Joint Institute of Theoretical and Computational Physics The University of Hong Kong.Hong Kong SARChina CAS Center for Excellence in Topological Quantum Computation.University of Chinese Academy of Sciences.Beijing 100190 China

Recently,quantum simulation of low-dimensional lattice gauge theories(LGTs)has attracted many interests,which may improve our understanding of strongly correlated quantum many-body ***,we propose an implementation to approximate Z;LGT on superconducting quantum circuits,where the effective theory is a mixture of a LGT and a gauge-broken *** using matrix product state based methods,both the ground state properties and quench dynamics are systematically *** an increase of the transverse(electric)field,the system displays a quantum phase transition from a disordered phase to a translational symmetry breaking *** the ordered phase,an approximate Gauss law of the Z;LGT emerges in the ground ***,to shed light on the experiments,we also study the quench dynamics,where there is a dynamical signature of the spontaneous translational symmetry *** spreading of the single particle of matter degree is diffusive under the weak transverse field,while it is ballistic with small velocity for the strong ***,due to the emergent Gauss law under the strong transverse field,the matter degree can also exhibit confinement dynamics which leads to a strong suppression of the nearest-neighbor *** results pave the way for simulating the LGT on superconducting circuits,including the quantum phase transition and quench dynamics.

关键词： quantum simulation superconducting circuits lattice gauge theories

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CREBBP/EP300 mutations promoted tumor progression in diffuse large B-cell lymphoma through altering tumorassociated macrophage polarization via FBXW7-N0TCHCCL2/ CSF1 axis

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Signal Transduction and Targeted Therapy 2021年第2期6卷 482-495页

作者： Yao-Hui Huang Kun Cai Peng-Peng Xu Li Wang Chuan-Xin Huang Ying Fang Shu Cheng Xiao Jian Sun Feng Liu Jin-Yan Huang meng-meng Ji Wei-Li Zhao Shanghai Istitute of Hematology State Key Laboratory of Medical GenomicsNational Research Center for Translational Medicine at ShanghaiRulin Hospital Afliated to Shanghai Jiao Tong University School of MedicineShanghaiChina School of Life Sciences and Biotechnology.Shanghai Jiao Tong Universiy ShanghalChina Department of Immunobiology and Microbiology Shanghai Istitute of ImmunologyShanghai Jiao Tong University School of MedicineShanghaiChina Pole de Recherches Sino Francais en Science du Vivant et Genomique Laboratory of Molecular PathologyShanghalChina

Epigenetic alterations play an important role in tumor progression of diffuse large B-cell lymphoma(DL BCL).However,the biological relevance of epigenetic gene mutations on tumor microenvironment remains to be *** core set of genes relating to histone methylation(KMT2D,KMT2C,EZH2),histone acetylation(CREBBP,EP300),DNA methylation(TET2),and chromatin remodeling(ARID1A)were detected in the training cohort of 316 patients by whole-genome/exome sequencing(WGS/WES)and in the validation cohort of 303 patients with newly diagnosed DL BCL by targeted *** correlation with peripheral blood immune cells and clinical outcomes were *** mechanisms on tumor microenvironment were investigated both in vitro and in *** all 619 DLBCL patients,somatic mutations in KMT2D(19.5%)were most frequently observed,followed by mutations in ARID1A(8.7%),CREBBP(8.4%),KMT2C(8.2%),TET2(7.8%),EP300(6.8%),and EZH2(2.9%).Among them,CREBBP/EP300 mutations were signifcantly associated with decreased peripheral blood absolute lymphocyte-to-monocyte ratios,as well as inferior progression-free and overall *** B-lymphoma cells,the mutation or knockdown of CREBBP or EP300 inhibited H3K27 acetylation,downregulated FBXW7 expression,activated the NOTCH pathway,and downstream CCL2/CSF1 expression,resulting in tumor-associated macrophage polarization to M2 phenotype and tumor cell *** B-lymphoma murine models,xenografted tumors bearing CREBBP/EP300 mutation presented lower H3K27 acetylation,higher M2 macrophage recruitment,and more rapid tumor growth than those with CREBBP/EP300 wild-type control via FBXW7-NOTCH-CCL2/CSF1 *** work thus contributed to the understanding of aberrant histone acetylation regulation on tumor microenvironment as an alternative mechanism of tumor progression in DLBCL.

关键词： FBXW7 P300 macrophage

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A Thermophilic G-Quadruplex DNA/N-methylmesoporphyrin IX Sensor for Accurately Detecting Single Nucleotide Polymorphism

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Journal of Analysis and Testing 2022年第1期6卷 44-50页

作者： Yu Yan Dan Zhao Qiang Zhang Yang-Yang Chang meng Liu School of Environmental Science and Technology Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education)Dalian University of TechnologyDalian 116024China School of Bioengineering Dalian University of TechnologyDalian 116024China

We found U2R1,a previously discovered G-rich DNA sequence,could form the G-quadruplex(G4)structure at high tem-perature and maintain high *** utilizing its specific binding ability with the N-methylmesoporphyrin IX(NMM,a fluorescent probe),a thermophilic signal transduction unit was proposed,that was the NMM-U2R1 *** methods for single nucleotide polymorphism(SNP)detection relying on the room-temperature rolling circle amplification system often suffered from poor accuracy,since the low temperature lowers the sensitivity for identifying the base *** this work,we combined the thermal stable signal transduction unit with the isothermal amplification reaction to develop a thermophilic fluorescent *** temperature could ensure the accuracy of base *** on this,this fluorescent assay has been successfully applied for the identification of one-or two-mismatched base DNA or microRNA *** it is expected to be generally applicable to identify SNPs in many other ***,this work will open new opportunities for development of the thermally stable G4 DNA in biosensor.

关键词： Thermophilic G-quadruplex DNA Isothermal amplification Single nucleotide polymorphism

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Functional near-infrared spectroscopy can detect low-frequency hemodynamic oscillations in the prefrontal cortex during steady-state visual evoked potentialinducing periodic facial expression stimuli presentation

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Visual Computing for Industry,Biomedicine,and Art 2020年第1期3卷 321-328页

作者： meng-Yun Wang Anzhe Yuan Juan Zhang Yutao Xiang Zhen Yuan Faculty of Health Sciences University of MacaoTaipaMacao SAR 999078China Centre for Cognitive and Brain Sciences University of MacaoTaipaMacao SAR 999078China Eastside High School 1201 SE 43rd StreetGainesvilleFL 32641USA Faculty of Education University of MacaoTaipaMacao SAR 999078China

Brain oscillations are vital to cognitive functions,while disrupted oscillatory activity is linked to various brain *** high-frequency neural oscillations(>1 Hz)have been extensively studied in cognition,the neural mechanisms underlying low-frequency hemodynamic oscillations(LFHO)<1 Hz have not yet been fully *** way to examine oscillatory neural dynamics is to use a facial expression(FE)paradigm to induce steady-state visual evoked potentials(SSVEPs),which has been used in electroencephalography studies of high-frequency brain oscillation *** this study,LFHO during SSVEP-inducing periodic flickering stimuli presentation were inspected using functional near-infrared spectroscopy(fNIRS),in which hemodynamic responses in the prefrontal cortex were recorded while participants were passively viewing dynamic FEs flickering at 0.2 *** fast Fourier analysis results demonstrated that the power exhibited monochronic peaks at 0.2 Hz across all channels,indicating that the periodic events successfully elicited LFHO in the prefrontal *** importantly,measurement of LFHO can effectively distinguish the brain activation difference between different cognitive conditions,with happy FE presentation showing greater LFHO power than neutral FE *** results demonstrate that stimuli flashing at a given frequency can induce LFHO in the prefrontal cortex,which provides new insights into the cognitive mechanisms involved in slow oscillation.

关键词： Steady state visual evoked potentials Dynamic facial expressions Functional near-infrared spectroscopy Brain oscillation

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Ultrahigh-power electrochemical double-layer capacitors based on structurally integrated 3D carbon tube arrays

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Nano Research 2023年第11期16卷 12849-12854页

作者： Fangming Han Guowen meng Dou Lin Gan Chen Shiping Zhang Ou Qian Xiaoguang Zhu Bingqing Wei Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and NanotechnologyInstitute of Solid State PhysicsHefei Institute of Physical ScienceChinese Academy of SciencesHefei 230031China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China Department of Mechanical Engineering University of DelawareNewarkDE 19716USA

The rational design of electrodes is the key to achieving ultrahigh-power performance in electrochemical energy storage ***,we have constructed well-organized and integrated three-dimensional(3D)carbon tube(CT)grids(3D-CTGs)using a 3D porous anodic aluminum oxide template-assisted method as electrodes of electrical double-layer capacitors(EDLCs),showing excellent frequency response *** unique design warrants fast ion migration channels,excellent electronic conductivity,and good structural *** study achieved one of the highest carbon-based ultrahigh-power EDLCs with the 3D-CTG electrodes,resulting in ultrahigh power of 437 and 1708 W·cm−3 with aqueous and organic electrolytes,*** constructed with these electrodes would have important application prospects in the ultrahigh-power *** rational design and fabrication of the 3D-CTGs electrodes have demonstrated their capability to build capacitors with ultrahighpower performance and open up new possibilities for applications requiring high-power output.

关键词： ultrahigh-power double-layer capacitor structurally integrated three-dimensional(3D)carbon tube smooth ion migration channels

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Enhanced aromatic selectivity by the sheet-like ZSM-5 in syngas conversion

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Journal of Energy Chemistry 2019年第8期28卷 44-48,I0003页

作者： Junhao Yang Ke Gong Dengyun Miao Feng Jiao Xiulian Pan Xiangju meng Fengshou Xiao Xinhe Bao State Key Laboratory of Catalysis National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of SciencesZhongshan Road 457 Dalian 116023 Liaoning China University of Chinese Academy of Sciences Yuquan Road 19A Shijingshan District Beijing 100049 China Department of Chemistry Zhejiang UniversityTianmushan Road 148 Xihu District Hangzhou 310028 Zhejiang China

Aromatics are important basic chemicals. However, direct conversion of syngas via the conventional Fischer-Tropsch synthesis produces little aromatics. We presented herein that a bifunctional composite of ZSM-5 in combination with Zn Cr Oxcatalyzes syngas conversion to aromatics. Particularly, ZSM-5 crystals with a sheet-like morphology can enhance significantly the aromatization activity. The lower length ratio of the b/a axes of the crystals, the more aromatics form but without influencing the selectivity of small molecules such as CH4 and C2–C4. Since the acid properties and the Al chemical environment were not altered while the morphology changed, the enhanced aromatic selectivity is likely attributed to the favored diffusion of aromatics in these sheet-like crystals.

关键词： Synthesis gas Aromatics Bifunctional OX-ZEO catalyst Zeolite Morphology

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Formation processes and source contributions of ground-level ozone in urban and suburban Beijing using the WRF-CMAQ modelling system

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Journal of Environmental Sciences 2023年第5期127卷 753-766页

作者： Shuxian Zhang Zhongzhi Zhang Yang Li Xiaohui Du Linglu Qu Wei Tang Jun Xu Fan meng Research Institute of Atmospheric Environment Chinese Research Academy of Environmental SciencesBeijing 100012China College of Water Sciences Beijing Normal UniversityBeijing 100875China Asia Center for Air Pollution Research Niigata 950-2144Japan

Beijing faces the challenge of high levels of ozone(O_(3))*** this study,the Weather Research and Forecasting model and Community Multiscale Air Qualitymodel(CMAQ)were used to simulate atmospheric O_(3) concentrations in *** investigate the formation mechanisms and source contributions of O_(3) pollution in different regions of Beijing,process analysis and the integrated source apportionmentmethodwithin the CMAQwere applied to O_(3) concentrations in the summer of *** process analysis results showed that vertical diffusion was the major contributor to O_(3) concentrations at all receptor sites in Beijing,at>65.94μg/(m^(3)·hr).Gas-phase chemical reactions consumed a significant amount of O_(3) in urban and inner suburban areas(>−5.57μg/(m^(3)·hr)),while near-surface chemical reactions made positive contributions in outer suburban areas(>4.72μg/(m^(3)·hr)).The O_(3) formation chemical reactions indicated that NO titration,which removes O_(3) at night-time,mainly occurred in urban *** weaker chemical reactions occurring near the surface in outer suburbs suggested that suburban-area O_(3) was produced in the upper atmospheric layers and was transported vertically to the lower *** O_(3) source apportionment results showed that boundary contributions were the dominant contributor to O_(3) pollution in Beijing(>40%).The contribution of non-local emissions to O_(3) levels was significantly greater in the outer suburbs than in urban and inner suburban areas due to *** study increases the understanding of the complex processes of O_(3) formation in different areas of Beijing and informs the implementation of O_(3) control plans.

关键词： Ozone Source apportionment Process analysis Air quality model

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RuO_(2)-PdO nanowire networks with rich interfaces and defects supported on carbon toward the efficient alkaline hydrogen oxidation reaction

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Journal of Energy Chemistry 2023年第8期83卷 255-263,I0008页

作者： Yuanyuan Cong Fanchao meng Haibin Wang Di Dou Qiuping Zhao Chunlei Li Ningshuang Zhang Junying Tian School of Petrochemical Technology Lanzhou University of TechnologyLanzhou 730050GansuChina Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province Lanzhou University of TechnologyLanzhou 730050GansuChina

Interfacial engineering is a promising approach for enhancing electrochemical performance,but rich and efficient interfacial active sites remain a challenge in ***,RuO_(2)-PdO heterostructure nanowire networks(NWs) with rich interfaces and defects supported on carbon(RuO_(2)-PdO NWs/C) for alkaline hydrogen oxidation reaction(HOR) was formed by a seed induction-oriented attachment-thermal treatment method for the first *** expected,the RuO_(2)-PdO NWs/C(72.8% Ru atomic content in metal) exhibits an excellent activity in alkaline HOR with a mass specific exchange current density(jo,m) of 1061 A gRuPd-1,which is 3.1 times of commercial Pt/C and better than most of the reported nonPt noble metal HOR *** at the high potential(~0.5 V ***) or the presence of CO(5 vol%),the RuO_(2)-PdO NWs/C still effectively catalyzes the alkaline ***/electrochemical analysis and theoretical calculations reveal that the interfaces between RuO_(2) and PdO act as the active *** electronic interactions between the two species and the rich defects for the interfacial active sites weaken the adsorption of Had,also strengthen the adsorption of OHad,and accelerate the alkaline HOR ***,OHadon RuO_(2) can spillover to the interfaces,keeping the RuO_(2)-PdO NWs/C with the stable current density at higher potential and high resistance to CO poisoning.

关键词： Hydrogen oxidation reaction Heterostructure Nanowire networks Defects Interfacial active sites

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