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Numerical analysis on zone-divided deep excavation in soft clays using a new small strain elasto–plastic constitutive model

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Underground Space 2022年第1期7卷 19-36页

作者： Afnan Younis Tanoli Bin Yan yong-lin xiong Guan-lin Ye Usama Khalid Zhong-hua Xu Department of Civil Engineering State Key Laboratory of Ocean Engineering and ShanghaiKey Laboratory for Digital Maintenance of Buildings and InfrastructureShanghai Jiao Tong UniversityShanghai 200240China Institute of Geotechnical Engineering Ningbo UniversityNingbo 315211China Department of Civil Engineering Khwaja Fareed University of Engineering and Information TechnologyRahim Yar Khan 64200Pakistan East China Architectural Design&Research Institute Shanghai 200002China

Accurate prediction of displacements associated with deep excavations is essential to ensure safety and stability of the excavation and to prevent any damage and distress to the adjoining *** paper presents a numerical approach for prediction of ground displacements related to a zone-divided deep excavation construction executed in Shanghai soft clays based on a new elasto–plastic con-stitutive model(small-strain Shanghai model)that incorporates small strain *** model can describe the mechanical properties and structural and over-consolidated characteristics of natural *** model is implemented into a finite element analysis *** analysis on the deep excavation in Shanghai using zone-divided method is conducted.A comparison between monitored and simulated results of horizontal displacements along the diaphragm wall,the settlements in the surroundings,and the effects on the adjoin-ing metro tunnel due to excavation construction is carried *** attention is paid to the stiffness degradation of representative elements in the *** simulated displacements show a good agreement with the monitored ***,this study provides an integrated solution for predicting displacements related to deep excavation in soft clays.

关键词： Deep excavation Soft clays Small strain Elasto-plastic model Ground displacements Metro tunnels

Solar flare forecasting based on a Fusion Model

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Earth and Planetary Physics 2025年第1期9卷 171-181页

作者： YiYang Li Shiyong Huang SiBo Xu ZhiGang Yuan Kui Jiang QiYang xiong RenTong lin School of Earth and Space Science Technology Hubei Luojia LaboratoryWuhan UniversityWuhan 430072China

Solar flare prediction is an important subject in the field of space *** learning technology has greatly promoted the development of this *** this study,we propose a novel solar flare forecasting model integrating Deep Residual Network(ResNet)and Support Vector Machine(SVM)for both≥C-class(C,M,and X classes)and≥M-class(M and X classes)*** collected samples of magnetograms from May 1,2010 to September 13,2018 from Space-weather Helioseismic and Magnetic Imager(HMI)Active Region Patches and then used a cross-validation method to obtain seven independent data *** then utilized five metrics to evaluate our fusion model,based on intermediate-output extracted by ResNet and SVM using the Gaussian kernel *** results show that the primary metric true skill statistics(TSS)achieves a value of 0.708±0.027 for≥C-class prediction,and of 0.758±0.042 for≥M-class prediction;these values indicate that our approach performs significantly better than those of previous *** metrics of our fusion model’s performance on the seven datasets indicate that the model is quite stable and robust,suggesting that fusion models that integrate an excellent baseline network with SVM can achieve improved performance in solar flare ***,we also discuss the performance impact of architectural innovation in our fusion model.

关键词： solar flare pace weather deep learning Fusion Model

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Three-dimensional fracture of UO2 ceramic pellets by phase field modeling

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 169-180页

作者： Wei xiong Xuan Ye Hongzhang Cheng Xiaoming Liu Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Tsinghua University State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences School of Engineering Science University of Chinese Academy of Sciences

Fracture is the primary failure type for the UO2ceramic pellets,which are operated under irradiation and thermal processes,and physically confined by the *** this work,by combining closely coupled physical processes of heat conduction,heat transfer,and mechanical deformation with the cohesive phase field framework,we proposed a high-precision modeling of quasistatic cracking of three-dimensional （3D） UO2ceramic fuel pellets under high temperature and *** simulation results agree well with the experimental results,indicating that the proposed method has the potential to capture 3D crack modes in the interested time ***,we studied the relation of the 3D fracture patterns of fuel pellets with the peak power *** was found that the power level plays a critical role in determining the competition between radial and circumferential cracks,as well as transverse penetrating cracks.

关键词： phase field method nuclear fuel pellet coupled thermo-mechanical model thermal fracture

Thermally triggered topological polymerization in diacetylene-functionalized covalent organic framework toward enhanced memristive properties

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Science China Chemistry 2025年

作者： Panke Zhou Yuxing Huang Ziyue Yu Cong Zhang Qian Chen Yiping Li Chao lin xiong Chen State Key Laboratory of Photocatalysis on Energy and Environment Key Laboratory of Advanced Carbon-Based Functional MaterialsCollege of Chemistry Fuzhou University

The development of stimuli-responsive switching memory devices and the elucidation of their switching mechanisms in specific environments are crucial for advancing the field of molecular electronics. Herein, we propose two distinct two-dimensional covalent organic frameworks (COFs), namely Py-EDA and Py-BDA, incorporating acetylene (-C≡C-) or diacetylene(-C≡C-C≡C-) moieties, respectively, targeting fabricate memory devices exhibiting stimuli-responsive switching *** findings demonstrate that the incorporation of acetylene units effectively modulates the electronic band structure and enhances the degree ofπ-conjugation, resulting in devices that exhibit typical bipolar nonvolatile memory performance. Notably,upon thermal treatment, the memory behavior of the ITO/Py-BDA/Ag device transitions to a write-once-read-many-times(WORM) mode, displaying decreased SET voltage, increased ON/OFF current ratio, and remarkable retention reliability and cycle stability. This switching behavior is attributed to the occurrence of interlayer solid-state topological polymerization at 350℃, leading to the transformation of diacetylene columnar arrays into enyne chains within Py-BDA, thereby further promoting interlayer charge transfer and separation.

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农村突发公共卫生事件村民应急行为数据挖掘分析

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广东农业科学 2012年第22期39卷 199-201页

作者：区晶莹林泳雄俞丽华华南农业大学公共管理学院广东广州510642 华南农业大学信息学院广东广州510642 华南理工大学新闻与传播学院广东广州510642

改善村民应对突发公共卫生事件的行为能力,是提高政府及农村社会应急处置能力的主要任务之一。以广东梅州农村为实证,通过实地问卷调查收集数据资料,针对农村突发公共卫生事件,应用广义规则归纳数据挖掘方法分析村民的人口特征、对公共... 详细信息

改善村民应对突发公共卫生事件的行为能力,是提高政府及农村社会应急处置能力的主要任务之一。以广东梅州农村为实证,通过实地问卷调查收集数据资料,针对农村突发公共卫生事件,应用广义规则归纳数据挖掘方法分析村民的人口特征、对公共卫生知识的认识及在应急条件下的行为之间的规律性,以期为政府管理部门建设农村公共卫生应急服务体系和制定相关政策提供决策依据。

关键词：农村公共卫生突发事件应急行为广义规则归纳分析

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Adaptive-basis decomposition-based low-rank network for efficient non-uniform motion deblurring

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Optoelectronics Letters 2025年第1期21卷 43-50页

作者： CHEN Lei xiong Qingbo ZHANG Wei LI Runde School of Software Henan University School of Applied Technology China University of Labor Relations

In this study, we present a unified sparsity-driven framework that significantly enhances motion deblurring performance by integrating two key components: a custom-designed dataset and a low-rank module(LRM). This framework leverages the inherent sparsity of per-pixel blur kernels to bolster both deblurring accuracy and model interpretability. Firstly, we propose an adaptive-basis decomposition-based deblurring(ADD) approach, which constructs a tailored training dataset to enhance the generalization capacity of the deblurring network. The ADD framework adaptively decomposes motion blur into sparse basis elements, effectively addressing the intricacies associated with non-uniform blurs. Secondly, an LRM is proposed to improve the interpretability of deblurring models as a plug-and-play module, primarily designed to identify and harness the intrinsic sparse features in sharp images. A series of ablation studies have been conducted to substantiate the synergistic advantages of combining the proposed ADD with the LRM for overall improvement in deblurring efficacy. Subsequently, we empirically demonstrate through rigorous experimentation that incorporating the LRM into an existing Uformer network leads to substantial enhancement in reconstruction performance. This integration yields a sparsity-guided low-rank network(SGLRN). Operating under the overarching principle of sparsity, SGLRN consistently outperforms state-of-the-art methods across multiple standard deblurring benchmarks. Comprehensive experimental results, assessed through quantitative metrics and qualitative visual evaluations, provide compelling evidence of its effectiveness. The overall deblurring results are available at Google Drive.

关键词： Image enhancement

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藏族地区藏汉双语数学教育现状与对策

数学教育学报 2011年第4期20卷 67-70页

作者：徐永琳范忠雄西北民族大学数学与计算机科学学院

双语数学教育在发展过程中存在的问题有：课程与教材缺乏多样性和实用性，持有合格证书的双语数学师资严重缺乏，教学方法陈旧落后，双语教育信息化建设滞后．解决这些问题的对策有：加强双语数学教材建设；加快双语数学师资队伍建设；... 详细信息

双语数学教育在发展过程中存在的问题有：课程与教材缺乏多样性和实用性，持有合格证书的双语数学师资严重缺乏，教学方法陈旧落后，双语教育信息化建设滞后．解决这些问题的对策有：加强双语数学教材建设；加快双语数学师资队伍建设；实现课程的多样化，增强课程的适应性；加快双语远程教育建设；制定数学双语教学的评价体系等．

关键词：藏族双语教育双语教学教学模式

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MIMO Antenna Subset with Space Time Turbo Trellis Codes

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MIMO Antenna Subset with Space Time Turbo Trellis Codes

AZD1775 synergizes with SLC7A11 inhibition to promote ferroptosis

2005中国通信集成电路技术与应用研讨会

作者： Haifen Yang Guangjun Li School of Communication & Information Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China Wenfeng lin yong xiong Shanghai Research Center for Wireless Communications, Shanghai, 200050, China

＜正＞This paper consider a scheme combining transmit antenna selection （TAS） and space time Turbo trellis codes（ST-Turbo-TCs）, which is referred to as the ST-Turbo-TCs/TAS scheme. In this scheme, we choose two transmit antennas, which maximize the signal-to-noise ratio （SNR） at the receiver, to transmit the baseline ST-Turbo-TCs signals designed for two transmit antennas. Our simulation shows that this scheme can achieve significant performance gains with the increasing number of transmit antenna available for selection. In addition, this scheme doesn’t have the increasing complexity for the increasing performance gains, and needn’t particular code design for large number of transmit antennas.

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Science China Life Sciences 2025年第1期68卷 204-218页

作者： Chen xiong Hong ling Yingdan Huang Hanzhi Dong Bangxiang Xie Qian Hao Xiang Zhou Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences Fudan University Department of Oncology Shanghai Medical CollegeFudan University Department of Breast Surgery Fudan University Shanghai Cancer CenterFudan University Department of Oncology First Affiliated Hospital of Nanchang University Beijing Institute of Hepatology Beijing Youan HospitalCapital Medical University Beijing Engineering Research Center for Precision Medicine and Transformation of Hepatitis and Liver Cancer Key Laboratory of Breast Cancer in Shanghai Fudan University Shanghai Cancer CenterFudan University Shanghai Key Laboratory of Medical Epigenetics International Co-laboratory of Medical Epigenetics and Metabolism (Ministry of Science and Technology)Institutes of Biomedical SciencesFudan University

Tumor suppressor p53-mediated cell cycle arrest and DNA damage repair may exert cytoprotective effects against cancer therapies, including WEE1 inhibition. Considering that p53 activation can also lead to multiple types of cell death, the role of this tumor suppressor in WEE1 inhibitor-based therapies remains disputed. In this study, we reported that nucleolar stress-mediated p53 activation enhanced the WEE1 inhibitor AZD1775-induced ferroptosis to suppress lung cancer growth. Our findings showed that AZD1775 promoted ferroptosis by blocking cystine uptake, an action similar to that of Erastin. Meanwhile, inhibition of WEE1 by the WEE1 inhibitors or si RNAs induced compensatory upregulation of SLC7A11, which conferred resistance to ferroptosis. Mechanistically, AZD1775 prevented the enrichment of H3K9me3, a histone marker of transcriptional repression, on the SLC7A11 promoter by repressing the expression of the histone methyltransferase SETDB1, thereby enhancing NRF2-mediated SLC7A11 transcription. This finding was also validated using the H3K9me3 inhibitor BRD4770. Remarkably, we found that the nucleolar stress-inducing agent Actinomycin D(Act. D) inhibited SLC7A11 expression by activating p53, thus augmenting AZD1775-induced ferroptosis. Moreover, the combination of AZD1775 and Act. D synergistically suppressed wild-type p53-harboring lung cancer cell growth both in vitro and in vivo. Altogether, our study demonstrates that AZD1775 promotes ferroptosis by targeting cystine uptake but also mediates the adaptive activation of SLC7A11 through the WEE1-SETDB1 cascade and NRF2-induced transcription, and inhibition of SLC7A11 by Act. D boosts the anti-tumor efficacy of AZD1775 by enhancing ferroptosis in cancers with wild-type p53.

关键词： p53 NRF2 SLC7A11 WEE1 AZD1775 ferroptosis nucleolar stress