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Quantitative Investigation of Tomographic Effects in Abnormal Regions of Complex Structures

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Engineering 2021年第7期7卷 1011-1022页

作者： Longjun dong Xiaojie Tong ju Ma School of Resources and Safety Engineering Central South UniversityChangsha 410083China

The detection of abnormal regions in complex structures is one of the most challenging targets for underground space *** or artificial geologic variations reduce the effectiveness of conventional exploration *** the emergence of real-time monitoring,seismic wave velocity tomography allows the detection and imaging of abnormal regions to be accurate,intuitive,and *** tomographic results are affected by multiple factors in practical small-scale applications,it is necessary to quantitatively investigate those *** adopted an improved three-dimensional(3D)tomography method combining passive acoustic emission acquisition and active ultrasonic *** varying individual parameters(i.e.,prior model,sensor configuration,ray coverage,event distributions,and event location errors),37 comparative tests were *** quantitative impact of different factors was *** experiments showed that the method could effectively adapt to complex *** optimal input parameters based on quantization results can significantly improve the detection reliability in abnormal regions.

关键词： Detection of abnormal regions Tomographic effects Wave velocity Ray path

Analysis on phase selection and microstructure evolution in directionally solidified Zn-Al-Mg-Ce alloy

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China Foundry 2023年第4期20卷 347-355页

作者： Ji-peng Li De-gao Qiao Shi-wen dong peng peng Xian-tao Yan Xu-dong Zhang Gansu Jiu Steel Group Hongxing Iron and Steel Co. Ltd.Jiayuguan 735199GansuChina School of Materials and Energy Lanzhou UniversityLanzhou 730000China School of Physics and Electronic Information Engineering Qinghai Normal UniversityXining 810016QinghaiChina

In the process of hot-dip Zn-Al-Mg alloy coating,the plating solution dissipates heat in the direction perpendicular to the steel plate,which is considered to be a process of directional *** understand the relationship between microstructure and cooling rate of Zn-Al-Mg alloys,both the phase constitution and microstructure characteristic length scales of Zn-9.5Al-3Mg-0.01Ce(wt.%)alloy were investigated by the directional solidification experiments at different growth velocities(V=40,80,160,250μm·s^(-1)).The experimental results show that the microstructure of directionally solidified Zn-9.5Al-3Mg-0.01Ce alloy is composed of primary Al dendrites and(Zn-Al-Mg2Zn11)ternary eutectics at the growth velocities ranging from 40 to 250μm·s^(-1).The primary Al dendrites are aligned regularly along the growth direction,accompanied with obvious secondary *** relationship between the microstructure length scale and the thermal parameters of solidification is obtained:λ1=374.66V-0.383,andλ2=167.5V-0.563(λ1is the primary dendrite arm spacing,andλ2 is the secondary dendrit arm spacing).In addition,through the interface response function(IRF)and the nucleation and constitutional undercooling(NCU),the phase selection of Zn-9.5Al-3Mg-0.01Ce is obtained:(Zn+Al+Mg2Zn11)ternary eutectics in the Zn-9.5Al-3Mg-0.01Ce alloy will be replaced by ternary eutectics(Zn+Al+MgZn2)when the growth rate is lower than 7.53μm·s^(-1).

关键词： Zn-Al-Mg alloy directional solidification microstructure length scale phase selection

渗透破坏作用下管涌土强度劣化机制及预测模型

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长江科学院院报 2025年第1期42卷 186-193,207页

作者：邱松楠黎晓冬周鹏展国家开放大学中职学院北京100039 南京理工大学机械工程学院南京210094 北京工业大学城市与工程安全减灾省部共建教育部重点实验室北京100124

由于发展过程的隐蔽性和破坏后果的严重性,渗透破坏问题往往对涉水工程具有较大威胁。为研究管涌土在渗透作用下渗透破坏前后强度劣化特性,研发了土工内部冲蚀应力路径三轴仪。利用该装置围绕细颗粒含量、固结压力、水力梯度三种因素下... 详细信息

由于发展过程的隐蔽性和破坏后果的严重性,渗透破坏问题往往对涉水工程具有较大威胁。为研究管涌土在渗透作用下渗透破坏前后强度劣化特性,研发了土工内部冲蚀应力路径三轴仪。利用该装置围绕细颗粒含量、固结压力、水力梯度三种因素下强度劣化机制开展渗透破坏试验和三轴劣化试验。结果表明:细颗粒含量、固结压力和水力梯度因素对渗透破坏过程存在较大影响,从而影响管涌土的强度劣化性质,细颗粒含量和固结压力因素会降低管涌土的劣化度,而水力梯度因素则会显著提高管涌土的劣化度;采用双曲线函数对管涌土强度劣化度进行拟合,并通过数值模拟软件建立了渗透破坏强度劣化模型。研究成果可为涉水建筑物内部结构的强度分析以及溃坝等灾害的预测提供参考。

关键词：渗透破坏管涌土劣化度累计涌砂量数值模拟

增温和降水变化对旱作农田土壤细菌群落结构和功能的影响

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中国环境科学 2025年第1期45卷 508-518页

作者：田瑞寇谨胡啸张鹏雷俊王鹤龄吕晓东兰州交通大学环境与市政工程学院甘肃兰州730070 中国气象局兰州干旱气象研究所中国气象局干旱气候变化与减灾重点开放实验室甘肃兰州730020 祁连山中部亚高山生态系统野外科学观测研究站甘肃张掖734000

设置对照(CK),增温(W),降水量增加(+P30),降水量减少(-P30),增温和降水量增加(W+P30)和增温和降水量减少(W-P30)6个处理,开展了增温和降水变化对旱作农田土壤细菌群落结构和功能影响的田间试验.采用宏基因组测序研究不同处理下土壤细菌... 详细信息

设置对照(CK),增温(W),降水量增加(+P30),降水量减少(-P30),增温和降水量增加(W+P30)和增温和降水量减少(W-P30)6个处理,开展了增温和降水变化对旱作农田土壤细菌群落结构和功能影响的田间试验.采用宏基因组测序研究不同处理下土壤细菌群落的组成、多样性、网络结构和代谢功能特征.结果表明,W和W+P30处理显著增加了α变形菌纲的相对丰度,W+P30处理显著增加了绿弯菌门未定名属的相对丰度,W、+P30、W+P30和W-P30处理显著降低了放线菌门未定名属的相对丰度.+P30处理显著提高了Shannon指数、Simpson指数和Pielou指数,但W-P30处理显著降低了细菌的α多样性指数.增温、降水变化及其交互对细菌群落β多样性的影响存在显著差异.W、+P30、W+P30和W-P30处理的复杂性和连接性高于CK,但-P30处理的相关参数低于CK.W、-P30和W+P30处理增加了连接节点的数量,但+P30和W-P30处理没有增加连接节点的数量.W处理显著增加了循环系统的相对丰度,+P30处理显著降低了外源物质降解和代谢的相对丰度,-P30处理显著降低了排泄系统的相对丰度,W+P30处理显著降低了核苷酸代谢的相对丰度.增温、降水变化(降水量增加或减少)及其交互作用对小麦田土壤细菌群落结构和代谢功能有显著影响.

关键词：增温效应降水量变化旱作农田微生物群落

WADdiana Compact全自动血型分析仪偶见故障及排除

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医疗卫生装备 2025年第1期46卷 118-120页

作者：胡菊郑卫东湖北工业职业技术学院生态环境学院湖北十堰442000 湖北医药学院附属人民医院检验部湖北十堰442000

介绍了WADdiana Compact全自动血型分析仪在使用中出现的5例偶见故障,详细分析了故障原因,提出了具体的排除方法,为同行维修类似故障提供了参考。

关键词： WADdiana Compact全自动血型分析仪故障维修故障排除

Remaining Useful Life Prediction for a Roller in a Hot Strip Mill Based on Deep Recurrent Neural Networks

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IEEE/CAA Journal of Automatica Sinica 2021年第7期8卷 1345-1354页

作者： Ruihua Jiao Kaixiang peng Jie dong the Key Laboratory of Knowledge Automation for Industrial Processes of Ministry of Education School of Automation and Electrical EngineeringUniversity of Science and Technology BeijingBeijing 100083 the AVIC Xi’an Aviation Brake Technology Co. Ltd.Xi’an 710065China the Institute of Artificial Intelligence University of Science and Technology BeijingBeijing 100083China the Key Laboratory of Knowledge Automation for Industrial Processes of Ministry of Education School of Automation and Electrical EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Accurate estimation of the remaining useful life(RUL)and health state for rollers is of great significance to hot rolling *** can provide decision support for roller management so as to improve the productivity of the hot rolling *** addition,the RUL prediction for rollers is helpful in transitioning from the current regular maintenance strategy to conditional-based ***,a new method that can extract coarse-grained and fine-grained features from batch data to predict the RUL of the rollers is proposed in this ***,a new deep learning network architecture based on recurrent neural networks that can make full use of the extracted coarsegrained fine-grained features to estimate the heath indicator(HI)is developed,where the HI is able to indicate the health state of the *** that,a state-space model is constructed to describe the HI,and the probabilistic distribution of RUL can be estimated by extrapolating the HI degradation model to a predefined failure ***,application to a hot strip mill is given to verify the effectiveness of the proposed methods using data collected from an industrial site,and the relatively low RMSE and MAE values demonstrate its advantages compared with some other popular deep learning methods.

关键词： Hot strip mill prognostics and health management(PHM) recurrent neural network(RNN) remaining useful life(RUL) roller management.

新型c-KIT抑制剂PN17-1对胃肠道间质瘤GIST-882细胞的体外抗肿瘤作用及机制研究

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药学学报 2025年第2期60卷 379-387页

作者：沈继伟吴爽李军周云鹏陈烨刘举辽宁大学药学院辽宁省小分子靶向药物研发工程研究中心

近年来,胃肠道间质瘤(gastrointestinal stromal tumor, GIST)具有上升的发病率和死亡率,大多数GIST是由c-KIT基因的激活突变引起的,因此, c-KIT已成为GIST有前景的治疗靶点。目前,批准用于治疗GIST的药物包括伊马替尼、舒尼替尼、瑞戈... 详细信息

近年来,胃肠道间质瘤(gastrointestinal stromal tumor, GIST)具有上升的发病率和死亡率,大多数GIST是由c-KIT基因的激活突变引起的,因此, c-KIT已成为GIST有前景的治疗靶点。目前,批准用于治疗GIST的药物包括伊马替尼、舒尼替尼、瑞戈非尼和瑞派替尼等大多易产生耐药性并伴有不同程度的不良反应,因此迫切需要开发新型c-KIT抑制剂来解决耐药问题。本研究探究了新型c-KIT抑制剂PN17-1在体外对胃肠道间质瘤GIST-882细胞的抗肿瘤作用,发现PN17-1能够显著抑制GIST-882细胞增殖、克隆形成和迁移能力,并且能够显著下调GIST-882细胞p-c-KIT及其下游信号蛋白p-AKT、p-STAT5和p-ERK的表达水平。此外, PN17-1还可诱导GIST-882细胞发生凋亡, PN17-1诱导的凋亡可能主要与线粒体依赖的内源性途径有关。综上所述,新型c-KIT抑制剂PN17-1是一个有潜力的抗胃肠道间质瘤药物,本研究为今后进一步开发c-KIT抑制剂提供了新的思路。

关键词：胃肠道间质瘤 c-KIT抑制剂 GIST-882细胞增殖凋亡

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A proposal for preparation of cluster states with linear optics

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Chinese Physics B 2021年第3期30卷 55-60页

作者： Le ju Ming Yang peng Xue Beijing Computational Science Research Center Beijing 100084China School of Physics and Material Science Anhui UniversityHefei 230601China

Measurement-based quantum computation in an optical setup shows great promise towards the implementation oflarge-scale quantum computation. The difficulty of measurement-based quantum computation lies in the preparation ofcluster state. In this paper, we propose the method of generating the large-scale cluster state, which is a platform formeasurement-based quantum computation. In order to achieve more complex quantum circuits, the preparation protocolof N-photon cluster state will be proposed as a generalization of the preparation of four- and five-photon cluster ***, our proposal is experimentally feasible.

关键词： measurement-based quantum computing cluster states linear optical elements

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改进PSO-XGBoost的连铸定重预测

计算机工程与设计 2025年第1期46卷 290-297页

作者：高峰李新杰符海东彭浩武汉科技大学计算机科学与技术学院湖北武汉430065 武汉科技大学大数据科学与工程研究院湖北武汉430065 武汉科技大学湖北省智能信息处理与实时工业系统重点实验室湖北武汉430065 中冶南方连铸技术工程有限责任公司研究院湖北武汉430223 武汉轻工大学土木工程与建筑学院湖北武汉430023

为实现连铸坯有效定重预测,避免在连铸生产中产生质量缺陷和资源浪费,根据真实方坯生产数据,提出一种基于改进粒子群算法优化XGBoost的连铸定重预测模型。针对粒子群算法全局寻优精度较低等缺点进行改进,主要采用反向学习策略优化种群... 详细信息

为实现连铸坯有效定重预测,避免在连铸生产中产生质量缺陷和资源浪费,根据真实方坯生产数据,提出一种基于改进粒子群算法优化XGBoost的连铸定重预测模型。针对粒子群算法全局寻优精度较低等缺点进行改进,主要采用反向学习策略优化种群初始分布提高算法优化效率,根据进化状态自适应调整惯性权重,匹配粒子当前搜索状态,同时使用突变策略使粒子突破局部收敛。数值实验结果表明,改进算法收敛速度更快,精度更高,验证了良好性能。将其应用到XGBoost中优化模型超参数,连铸坯定重预测精度获得提升。

关键词：连铸定重预测 XGBoost 粒子群优化进化状态自动机器学习超参数优化