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一种ICEEMDAN-CNN-SVR滑坡位移组合预测模型

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三峡大学学报（自然科学版） 2025年第1期47卷 37-43页

作者：石化波王刚曾怀恩中煤湖北地质勘察基础工程有限公司武汉430070 中铁建城建交通发展有限公司江苏苏州215000 湖北长江三峡滑坡国家野外科学观测研究站湖北宜昌443002 三峡大学土木与建筑学院湖北宜昌443002

滑坡位移预测是滑坡早期预警系统的重要组成部分,针对位移分解程度与特征选取深入程度不够导致滑坡位移预测精度不高的问题,提出一种ICEEMDAN-CNN-SVR滑坡位移组合预测模型:为了解决位移分解程度不够的问题,该模型首先运用ICEEMDAN分解... 详细信息

滑坡位移预测是滑坡早期预警系统的重要组成部分,针对位移分解程度与特征选取深入程度不够导致滑坡位移预测精度不高的问题,提出一种ICEEMDAN-CNN-SVR滑坡位移组合预测模型:为了解决位移分解程度不够的问题,该模型首先运用ICEEMDAN分解模型对滑坡位移曲线进行分解,将平滑性较好且具有递增趋势的IMF曲线作为趋势项位移,将其他具有波动趋势的IMF曲线总和重构为周期项位移;为了解决特征选取深入程度不够的问题,针对不同位移特性进行了特征变量选取,通过二维平铺与CNN特征提取得到特征变量更深层次的信息,将提取到的特征信息输入SVR预测模型中实现对趋势项位移与周期项位移的精准预测.以典型堆积层滑坡———八字门滑坡为例,选取ZG110与ZG111监测点2007年1月—2012年9月典型变形阶段水平位移数据进行研究,结果表明:ZG110与ZG111监测点预测评价指标R2,ERMSE,EMAE分别为0.9951、0.9989、5.7489、2.7532,4.5091、1.8529,预测效果良好;将模型预测结果与EEMDCNN-SVR预测模型及CNN-SVR预测模型结果作对比,相较其他预测模型,新模型的预测精度有所提升.

关键词：八字门滑坡 ICEEMDAN分解特征提取 CNN-SVR模型对比分析

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构建中国特色刑法观应当关注的五大关系

学习论坛 2025年第1期 126-136页

作者：郑延谱曾钜中北京师范大学法学院北京100091

构建中国特色现代刑法观,应当关注其与中国传统刑法观、外来刑法理论、中国自主知识体系、中国刑事立法、中国刑事司法之间的五大关系。在传统刑法观的基础上,需建立“一体两翼三联结”的结构,目的在于以法治为灵魂,以三大刑法基本原则... 详细信息

构建中国特色现代刑法观,应当关注其与中国传统刑法观、外来刑法理论、中国自主知识体系、中国刑事立法、中国刑事司法之间的五大关系。在传统刑法观的基础上,需建立“一体两翼三联结”的结构,目的在于以法治为灵魂,以三大刑法基本原则为支柱,以中国特色社会主义理论为行动指南,建立具有中国特色的刑法观。外来刑法理论为刑法原则、刑罚目的、法益平衡、犯罪治理的研究切入视角,同时为社会主义精神文明建设领域内新型犯罪活动的治理等方面提供启示。一方面,中国特色现代刑法观的自主性需要以高质量学术人才培养体系作支撑;另一方面,刑法观的独特价值体现于文化中所承载的公平、正义。中华传统法律文化缺乏权利平等的实质,在构建中国刑法自主话语体系的过程中,成为应当着力修补的短板。习近平法治思想是引领中国刑法观进而构建中国刑法自主话语体系的指导思想,体现为刑法基本原则的刑法观应作为构建中国刑法观自主话语体系的三大支柱。

关键词：刑法观中国特色自主知识体系构建关系

改良数字化导板对第二磨牙游离缺失辅助种植的精确度

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中国组织工程研究 2025年第4期29卷 738-744页

作者：张宇航曾宇宁曾尽娣卢依旋叶慧吉建新广州医科大学附属第一医院口腔科广东省广州市510120 广州信德君乐口腔门诊部有限公司广东省广州市510620

背景:静态数字化导板辅助种植可提高种植精度,但对于开口度小和种植位点牙合间距离小的患者后牙区使用较为受限,为此需要对数字化导板进行改良。目的:研究改良数字化导板对第二磨牙游离缺失辅助种植的精确度。方法:选择2020年7月至2023... 详细信息

背景:静态数字化导板辅助种植可提高种植精度,但对于开口度小和种植位点牙合间距离小的患者后牙区使用较为受限,为此需要对数字化导板进行改良。目的:研究改良数字化导板对第二磨牙游离缺失辅助种植的精确度。方法:选择2020年7月至2023年7月就诊于广州医科大学附属第一医院的第二磨牙游离缺失患者40例,采用掷硬币法随机分为试验组(n=22)与对照组(n=18),分别接受改良数字化导板辅助种植手术与常规自由手种植手术。对患者术前及术后锥形束CT进行重叠分析,比较组间的颈部偏差、尖端偏差、深度偏差、角度偏差值。术后1周,通过目测类比评分评估患者对手术过程的满意度。结果与结论:①试验组植入25颗种植体(上颌12颗,下颌13颗),对照组植入23颗种植体(上颌8颗,下颌15颗),试验组患者颈部偏差、尖端偏差、深度偏差、角度偏差值均小于对照组(P0.05);②两组患者对手术过程的满意度比较差异无显著性意义(P>0.05);③结果表明,改良数字化导板对第二磨牙游离缺失辅助种植可提高手术精度,适用于开口度小和种植位点牙合间距离小的患者后牙区。

关键词：种植精度改良种植导板第二磨牙缺失牙合间距离牙种植

In situ high-pressure wide-angle hard x-ray photon correlation spectroscopy:A versatile tool probing atomic dynamics of extreme condition matter

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Matter and Radiation at Extremes 2023年第2期8卷 76-78页

作者： Qiaoshi zeng Center for High Pressure Science and Technology Advanced Research PudongShanghai 201203People’s Republic of China Shanghai Key Lab of Material Frontiers Research in Extreme Environments(MFree) Shanghai Advanced Research in Physical Sciences(SHARPS)PudongShanghai 201203People’s Republic of China

With the advent of new synchrotron radiation x-ray sources that provide a significantly enhanced coherent flux,high-energy x-ray photon correlation spectroscopy measurements can be performed on materials in a diamond anvil *** information on atomic dynamics that was previously inaccessible can be obtained for various novel phenomena emerging under extreme *** article discusses the importance,feasibility,and experimental details of this technique,as well as the opportunities that it offers to address critical scientific challenges.

关键词： extreme dynamics spectroscopy

Response of bacteria in the deep-sea sediments and the Antarctic soils to carbohydrates: Effects on ectoenzyme activity and bacterial community

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Journal of Environmental Sciences 2010年第11期22卷 1779-1785页

作者： Xiang zeng School of Life Sciences Xiamen University Xiamen 361005 China. Key Laboratory of Marine Biogenetic Resources Third Institute of Oceanography State Oceanic Administration Xiamen 361005 China School of Life Sciences and Biotechnology Shanghai Jiaotong University Shanghai 200240 China

The response of bacteria to various carbohydrates in the deep-sea sediments and the Antarctic soils was investigated using cellulose, chitin, and olive oil. It was found that the carbohydrates significantly increased the corresponding specific ectoenzyme activity （β- glucosidase, β-N-acetylglucosaminidase, lipase） in the samples from deep-sea sediments. In the case of Antarctic soil samples, the cellulose or olive oil amendments had minor or no effect on β-glucosidase or lipase activity, except the chitin which stimulated β- N-acetylglucosaminidase production. The responses of the bacteria in the deep-sea sediment sample WP02-3 and the Antarctic soil sample CC-TY2 towards the chitin amendment were further analyzed. Chitin amendments were shown to stimulate the ectoenzyme activity in all the tested sediments and the soils. The bacterial response before and after the carbohydrates amendments were compared by denaturing gradient gel electrophoresis and quantitative competitive polymerase chain reaction. Significant changes were found in the structure and density of the bacterial community in the deep sea sediments as compared to the Antarctic soil sample, where the effects were relatively lower. There was no change in the bacterial population in both studied samples in response to carbohydrates amendments. These data indicate that the bacterial communities in the oligotrophic deep-sea sediments are more dynamic than that in the Antarctic soils as they respond to the nutrient sources efficiently by regulation of ectoenzyme activity and/or changing community structure.

关键词： deep-sea sediments Antarctic soils amending cellulose chitin olive oil ectoenzyme activity

Experimental Study on Geometry Characteristics of Turbulent Premixed Flames for Natural Gas/Air Mixtures

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Journal of Thermal Science 2025年第1期 268-282页

作者： ZHENG Weilin WANG Qijiao XIAO Huahua CHEN Xiaoxiao XIE Fan zeng Wen Liaoning Key Lab of Advanced Test Technology for Aerospace Propulsion System Shenyang Aerospace University State Key Laboratory of Fire Science University of science and Technology of China AVIC Shenyang Aircraft Design and Research Institute

In this study,focusing on the geometry characteristics of spherical expanding flame,the turbulent premixed flames of natural gas/air mixtures were investigated in a fan-stirred turbulent *** effects of initial temperature（T=300-400 K）,initial pressure（P=0.1-0.3 MPa）,turbulence intensity（u'=1.0-2.7 m/s）,oxygen volumetric percentage(φ（O2）=15%-21%) and carbon dioxide volumetric percentage(φ（CO2）=0-20%)were delved *** flame profile under the Cartesian coordinate system was derived from the schlieren images taken by the high-speed ***,from both macroscopic and microscopic perspectives,the influence of experimental conditions on the flame geometry characteristics was explored through flame front extraction,wavelet decomposition and network *** results demonstrate that for significant flame wrinkling,changes in species concentrations and turbulence intensity have more pronounced effects on the flame wrinkling *** wrinkling of the flame front maintains a certain degree of similarity,as evidenced by the locally concentrated distribution of the angles of the maximum fluctuation *** disturbance energy under large-scale（D6-D8） disturbances exhibits relatively high values with a similar trend,exerting a significant impact on the geometry characteristics of the flame *** peaks of correlation degree are scattered either with the decomposition scale or the development of flame radius,indicating no linear correlation between different detail ***,the probability distribution of node degrees in key wrinkled regions exhibits different trends with that of large-scale wrinkling and disturbance energy,especially with changes in initial *** occurs because the number of key wrinkles varies based on the perturbation's strength or the region's ***,an increase in the fluctuation frequency of the flame's local radius may not necessarily lead to an increase in the number of key folded regions.

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Effect of dissolved oxygen on electrochemical corrosion behavior of 2205 duplex stainless steel in hot concentrated seawater

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Journal of Materials Science & Technology 2021年第7期66卷 177-185页

作者： Hongtao zeng Yong Yang Minhang zeng Moucheng Li Institute of Materials School of Materials Science and EngineeringShanghai UniversityShanghai 200072China

The corrosion behavior of 2205 duplex stainless steel was investigated in hot concentrated seawater with different dissolved oxygen(DO) concentration by electrochemical measurement techniques and surface analysis methods. DO obviously enhances the cathodic reaction process, the formation of passive film and polarization resistance. With increasing the DO concentration from 0.34 to 3.06 mg L^(-1), the relative contents of Fe_(2)O_(3) and Cr_(2)O_(3) and the Cr-enrichment gradually enlarge in the passive film. The higher DO concentrations result in lower defect densities and thicker of space charge layers in the passive films,whichmayeffectively inhibit the intrusion of aggressive chloride ions. The increment inDOconcentration clearly increases the pitting potential, but decreases the repassivation potential. It may weaken both the occurrence and repassviation tendencies of stable pitting corrosion.

关键词： Dissolved oxygen Pitting corrosion 2205 duplex stainless steel Hot concentrated seawater Passivation

A nonlinear k_p-ε_p particle two-scale turbulence model and its application

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Acta Mechanica Sinica 2007年第6期23卷 621-625页

作者： Zhuoxiong zeng Zhuozhi zeng Yihua Xu Aeronautic and Mechanical Engineering College Nanchang Hangkong University Nanchang 330063 China

A particle nonlinear two-scale kp-εp turbulence model is proposed for simulating the anisotropic turbulent two-phase flow. The particle kinetic energy equation for two-scale fluctuation, particle energy transfer rate equation for large-scale fluctuation, and particle turbulent kinetic energy dissipation rate equation for small-scale fluctuation are derived and closed. This model is used to simulate gas-particle flows in a sudden-expansion chamber. The simulation is com- pared with the experiment and with those obtained by using another two kinds of tow-phase turbulence model, such as the single-scale k-ε two-phase turbulence model and the particle two-scale second-order moment （USM） two-phase turbulence model. It is shown that the present model gives simulation in much better agreement with the experiment than the single-scale k-ε two-phase turbulence model does and is almost as good as the particle two-scale USM turbu-lence model.

关键词： Gas-particle flows Second-order moment model Two-scale fluctuation

Molecular Understanding of Heat Transfer in Ionic-Liquid-based Electric Double Layers

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Journal of Thermal Science 2023年第1期32卷 192-205页

作者： zeng Ziya zeng Liang WANG Ruzhu FENG Guang Institute of Refrigeration and Cryogenics Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Coal Combustion School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Electric double layer capacitors(EDLCs)as promising electrical energy storage devices are faced with thermal management issues,which concern the performance and lifetime of the *** transfer at the solid-liquid interface has a crucial impact on the thermal management of *** this work,the interfacial thermal resistance(Kapitza resistance)of the interface between ionic liquid(IL)and graphite electrode is determined,and the heat transfer resistance in the uncharged/charged system with different temperatures is investigated via molecular dynamics *** is found that Kapitza resistance near the negative-charged interface decreases by 23%compared to that in the uncharged system,while the temperature effect on Kapitza resistance is little in our *** unique ion layer structure of ILs formed at the interface may influence the thermal transport *** are performed to investigate the effects of surface charge and working temperature on the heat transfer resistance of interfacial ILs from three aspects:ionic spacing,inter-ion interaction,and heat *** the influence of surface charge,ionic spacing in the electric double layer is found to decrease while the inter-ion interaction and heat capacity increase,leading to the reduction in thermal resistance of interfacial ***,rising temperature has small effects on the three thermal properties,with a slight tendency to increase the thermal resistance of ILs.

关键词： supercapacitor solid-liquid interface electric double layer thermal resistance molecular dynamics simulation