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基于红外图像时域特征的沥青混合料细观裂缝评价研究

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激光与红外 2024年第2期54卷 242-248页

作者：侯德华李忠玉张庆 BuselAV 河南省高远公路养护技术有限公司河南新乡453003 河南省高等级公路检测与养护技术重点实验室河南新乡453003 河南师范大学化学化工学院河南新乡453007 白俄罗斯国立技术大学白俄罗斯明斯克220071

为优化沥青混合料中细观裂缝的快速评价方法与效率,首先通过室内试验设计沥青混合料细观裂缝制备及其评价方法,采用线激光对试件进行扫描并采集红外图像,通过对红外图像数据分析,建立基于时间序列的温度区间特征追踪方法,进而计算温度... 详细信息

为优化沥青混合料中细观裂缝的快速评价方法与效率,首先通过室内试验设计沥青混合料细观裂缝制备及其评价方法,采用线激光对试件进行扫描并采集红外图像,通过对红外图像数据分析,建立基于时间序列的温度区间特征追踪方法,进而计算温度区间特征面积及其扩散速率与线激光位移的热特性变化关系,最后对试件中的细观裂缝位置和宽度进行定量分析。研究表明,基于温度区间热效应的扩散速率,可以增强试件中细观裂缝的空间分辨率,同时随着线激光逐渐靠近裂缝,温度特征面积扩散速率明显表现出先降低后增加的趋势,说明试件裂缝处的热扩散能量逐渐降低并趋近于零,当线激光远离裂缝时,试件表面的热扩散速率又逐渐增加,体现出很强的细观裂缝热阻隔现象。结果表明,在裂缝处温度区间B、C的特征面积始终位处于特征曲线的最低波谷位置,且温度区间B的裂缝定位误差小于5.61%;同时,在可靠度水平为95%条件下,通过亚像素算法计算的裂缝特征面积宽度与裂缝宽度的相关性达到0.9952,预测裂缝宽度的相对误差不大于4.13%。该评价方法显示了基于时序特征的温度区间对不同细观裂缝宽度均具有显著的敏感性,可为车载移动式热成像技术自动化检测沥青路面裂缝的应用提供理论基础和借鉴。

关键词：线激光红外成像温度区间热扩散速率细观裂缝特征

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长纤维抗裂复合封层机远程监控系统

机械设计与制造 2024年第10期 277-281,288页

作者：苏银松李志勇叶敏李忠玉长安大学公路养护装备国家工程实验室陕西西安710064 河南省高远公路养护技术有限公司河南新乡458000

结合我国长纤维抗裂复合封层机使用情况与未来发展趋势,长纤维抗裂复合封层机远程监控研究势在必行。设计长纤维抗裂复合封层机远程监控系统,对封层机发动机系统、供料系统、撒布系统、物料参数以及基础参数实时监控,实现施工数据实时... 详细信息

结合我国长纤维抗裂复合封层机使用情况与未来发展趋势,长纤维抗裂复合封层机远程监控研究势在必行。设计长纤维抗裂复合封层机远程监控系统,对封层机发动机系统、供料系统、撒布系统、物料参数以及基础参数实时监控,实现施工数据实时监控、安全施工、提高施工质量。基于4G网络建立远程监控系统的基本框架,分析发动机系统、供料系统、撒布系统、物料参数、设备基础参数监控的必要性,设计无线发送终端DTU,分析设计数据库与服务器。通过实验采集到长纤维抗裂复合封层机施工监控数据,验证系统可行性和有效性。

关键词：远程监控现场采集 CAN-DTU 4G GPS

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lncRNA UCA1在急性髓系白血病患者中的表达及其临床意义

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中国实验血液学杂志 2024年第4期32卷 999-1004页

作者：白雪伍燕平李忠玉陈晓奉王蒙李佳佳蚌埠医学院第一附属医院血液科安徽蚌埠233003

目的:检测急性髓系白血病(AML)患者骨髓中尿路上皮癌胚抗原1(lncRNA UCA1)的表达水平,并探讨lnc RNA UCA1表达水平在AML患者中的临床意义。方法:收集50例AML患者骨髓标本作为实验组和20例缺铁性贫血(IDA)患者骨髓标本作为对照组,并收集... 详细信息

目的:检测急性髓系白血病(AML)患者骨髓中尿路上皮癌胚抗原1(lncRNA UCA1)的表达水平,并探讨lnc RNA UCA1表达水平在AML患者中的临床意义。方法:收集50例AML患者骨髓标本作为实验组和20例缺铁性贫血(IDA)患者骨髓标本作为对照组,并收集AML患者的相关临床病理特征资料。采用实时荧光定量PCR(q RT-PCR)检测lnc RNA UCA1在实验组和对照组中的表达水平,并分析lnc RNA UCA1在AML患者中的表达水平与临床病理特征及预后的关系。采用Kaplan-Meier曲线分析lnc RNA UCA1表达水平对AML患者总体生存时间(OS)的影响;采用Cox风险回归模型分析影响AML患者预后的因素。结果:与对照组相比,lnc RNA UCA1表达水平在AML患者中明显升高(P0.05);lnc RNA UCA1高表达组患者的OS较低表达组患者显著缩短(P=0.0229)。结论:lnc RNA UCA1表达水平在AML患者中明显上调,其高表达与较差的临床病理特征及不良预后相关,可作为判断AML患者预后的指标和潜在的治疗靶点。

关键词：急性髓系白血病 lncRNA UCA1 预后临床意义

Alkali-Responsive Absorption Spectra and Third-Order Optical Nonlinearities of Imino Squaramides

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Chinese Physics Letters 2012年第5期29卷 118-121页

作者： li zhong-yu XU Song ZHOU Xin-yu ZHANG Fu-Shi School of Petrochemical Engineering Changzhou UniversityChangzhou 213164 Changzhou Expansion New Stuff Technology limited Company Changzhou 213122 Department of Material Science and Chemical Engineering Jilin Institute of Chemical TechnologyJilin 132022 Department of Chemistry Tsinghua UniversityBeijing 100084

Third-order optical nonlinearities and dynamic responses of two imino squaramides under neutral and base conditions were studied using the femtosecond degenerate four-wave mixing technique at *** optical responses have been observed and the magnitude of the second-order hyperpolarizabilities of the squaramides has been measured to be as large as 10 31 esu. The absorption spectra,color of solution,and third-order optical nonlinearities of two imino squaramides change with the addition of sodium *** γ value under the base condition for each dye is approximately 1.25 times larger than that under neutral conditions.

关键词： neutral Alkali base

地市农商银行整村授信使用率数据分析——以H农商银行为例

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电脑与电信 2024年第5期 1-5页

作者：黄慧君王波李宇中广西民族大学政治与公共管理学院广西壮族自治区南宁530006 惠州学院计算机科学与工程学院广东惠州516007

在乡村振兴背景下,H农商银行实施“整村授信”,在H市建设农村信用体系、稳定农村金融秩序、支持特色产业振兴发展发挥重要作用。“整村授信”在H农商银行已开展三年,需对“整村授信”使用率研究,以更好回顾与总结。为此,基于H农商银行... 详细信息

在乡村振兴背景下,H农商银行实施“整村授信”,在H市建设农村信用体系、稳定农村金融秩序、支持特色产业振兴发展发挥重要作用。“整村授信”在H农商银行已开展三年,需对“整村授信”使用率研究,以更好回顾与总结。为此,基于H农商银行三年“整村授信”数据研究,首先,统计数据中授信使用率与其影响因素;其次,聚类分析“整村授信”客群分组授信使用率;最后,通过数据挖掘找出授信使用率高置信度关联项。通过授信使用率量化研究,分析成因,为提高授信效率和授信使用率提供数据支撑,以更好推动H农商银行“整村授信”业务发展。

关键词：整村授信农商银行数据统计数据挖掘用信率

A RIVER FLOW ROUTING MODEL BASED ON DIGITAL DRAINAGE NETWORK

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Journal of Hydrodynamics 2005年第4期17卷 483-488页

作者： yuAN Fei REN li-liang yu zhong-bo XU Jing State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University Nanjing 210098 China

On the basis of Digital Elevation Model （DEM） data, watershed delineation and spatial topological relationship were proposed by the Digital Elevation Drainage Network Model （DEDNM） for the area upstream of the Hanzhong Hydrological Station in the Hanjiang River in China. Then, the Muskingum-Cunge method considering lateral flow into the river was applied to flood routing on the platform of digital basin derived from DEDNM. Because of considering lateral flow into the river, the Muskingum-Cunge method performs better than the Muskingum method in terms of the Nash-Sutcliffe model efficiency coefficient and the relative error of flood discharge peak value. With a routing-after-superposition algorithm, the Muskingum-Cunge method performs better than the Muskingum method in terms of the Nash-Sutcliffe model efficiency coefficient and the relative error of flood discharge peak value. As a result, the digital basin coupled with the Muskingum-Cunge method provides a better platform for water resources management and flood control.

关键词： Digital Elevation Model(DEM) digital basin drainage network flood river flow routing

Self-Aggregation Enhanced Third-Order Optical Nonlinearities of Aryloxy Substituted Zinc Phthalocyanines

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Chinese Physics Letters 2013年第12期30卷 42-45页

作者： li zhong-yu WU Chun-Hui HUANG Xin XU Song Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Department of Petrochemical EngineeringChangzhou UniversityChangzhou 213164 Institute of Animal and Plant Quarantine of Chinese Academy of Inspection and Quarantine Beijing 100029

Third-order optical nonlinearities of three aryloxy substituted phthalocyanines are measured by femtosecond forward degenerate four-wave mixing technique at 800 *** optical responses are observed and the magnitude of the second-order hyperpolarizabilitiesγof the phthalocyanines is measured to be as large as 10?31 *** to the enhancement of J-aggregates,theγvalue of an aryloxy substituted zinc phthalocyanine in chloroform is approximately 2.2 times larger than that of the dye in ***,the morphologies of aryloxy substituted zinc phthalocyanine in chloroform exhibit that the nanowires with a diameter of 50–100 nm are connected to each other to form an indefinite network structure,while no aggregates are detected when the samples are prepared from a solution in the methanol.

关键词： phthalocyanine substituted methanol

Comparison of water quality in two catchments with different forest types in the headwater region of the Hun River, Northeast China

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Journal of Forestry Research 2019年第2期30卷 565-576页

作者： Jiao-jun Zhu li-zhong yu Tian-le Xu Xiaohua Wei Kai Yang CAS Key Laboratory of Forest Ecology and Management Institute of Applied Ecology Chinese Academy of Sciences Qingyuan Forest CERN Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Earth and Environmental Sciences University of British Columbia (Okanagan Campus)

In the headwater catchments of the Hun River,Northeast China, secondary forests(SF) have been replaced by plantations since the 1960 s. Concern has been growing over this loss and the decline in water quality caused by the plantations. To test the effects of plantations on water quality, we selected two separate catchments covered by SF and Pinus koraiensis plantations(KP) to monitor physical and chemical properties of various hydrological variables including throughfall, stemflow,through-litterfall and runoff(flowing out of outlets of the catchments). The physical properties of water declined after water flowed through the two catchments as compared with rainwater. The pH of runoff in both catchments also dramatically decreased. The concentrations of Cl^-, NO_3^- and NH_4^+ in the runoff from the two catchments were similar(concentrations of Cl-and NH_4^+ in both catchments were similar to those in rainwater). Total P concentration in runoff of the SF catchment was higher than that of the KP catchment(P concentrations in both catchments were also higher than in rainwater) because P concentrations in litter and soil of the SF catchment were higher than those in the KP catchment. In summary, the rainwater became acidic in both catchments, but the responses of most water quality variables were similar in the two catchments, suggesting that appropriate ratios of KP in SF are feasible for secondary forest recovery and for preserving water quality(KP did not cause a decline in quality) in the headstream regions in Northeast of China.

关键词： Forested catchments Secondary forests Plantations Water quality

Determination of Soil Parameters in Apple-Growing Regions by Near-and Mid-Infrared Spectroscopy

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Pedosphere 2011年第5期21卷 591-602页

作者： DONG Yi-Wei YANG Shi-Qi XU Chun-Ying li yu-zhong BAI Wei FAN zhong-Nan WANG Ya-Nan li Qiao-Zhen Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences Beijing 100081 (China) Key Laboratory of Agro-Environment and Climate Change Ministry of Agriculture Beijing 100081 (China) Key Laboratory of Dryland Farming and Water-Saving Agriculture Ministry of Agriculture Beijing 100081 (China)

Soil quality monitoring is important in precision *** study aimed to examine the possibility of assessing the soil parameters in apple-growing regions using spectroscopic methods.A total of 111 soil samples were collected from 11 typical sites of apple orchards,and the croplands surrounding ***-infrared(NIR) and mid-infrared(MIR) spectra,combined with partial least square regression,were used to predict the soil parameters,including organic matter(OM) content,pH,and the contents of As,Cu,Zn,Pb,and *** matter and pH were closely correlated with As and the heavy *** NIR model showed a high prediction accuracy for the determination of OM,pH,and As,with correlation coefficients(r) of 0.89,0.89,and 0.90,*** predictions of these three parameters by MIR showed reduced accuracy,with r values of 0.77,0.84,and 0.92,*** heavy metals could also be measured by spectroscopy due to their correlation with organic *** NIR and MIR had high correlation coefficients for the determination of Cu,Zn,and Cr,with standard errors of prediction of 2.95,10.48,and 9.49 mg kg-1 for NIR and 3.69,5.84,and 6.94 mg kg-1 for MIR,*** content behaved differently from the other *** NIR and MIR underestimated Pb content,with r values of 0.67 and 0.56 and standard errors of prediction of 3.46 and 2.99,*** and Zn had a higher correlation with OM and pH and were better predicted than Pb and ***,NIR spectra could accurately predict several soil parameters,metallic and nonmetallic,simultaneously,and were more feasible than MIR in analyzing soil parameters in the study area.

关键词： heavy metals partial least square regression prediction accuracy soil quality spectroscopic method