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Towards accurate mapping of loess waterworn gully by integrating google earth imagery and DEM using deep learning

International Soil and Water Conservation Research 2024年第1期12卷 13-28页

作者： Rong Chen Yi Zhou zetao wang Ying Li Fan Li Feng Yang School of Geography and Tourism Shaanxi Normal UniversityXi'an710119China National Experiment and Teaching Demonstration Center for Geography Xi'an710119China SuperMap Software Co. Ltd.Beijing100015China School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen518055China

Accurate mapping of loess waterworn gully(LWG)is essential to further study gully erosion and geomorphological evolution for the Chinese Loess Plateau(CLP).Due to the vertical joint and collapsibility of loess,LWGs have the characteristics of zigzag and unique slope abruptness under synthetic action of hydraulic force and *** forces existing LWG mapping methods to either focus on the improvement of mapping accuracy or center on the increase of mapping ***,simultaneously achieving accurate and efficient mapping of LWG is still in its infancy under complex topographic ***,we proposed a method that innovatively integrates the loess slope abruptness feature into an improved deep learning semantic segmentation framework for LWG mapping using 0.6 m Google imagery and 5 m DEM *** selected four study areas representing typical loess landforms to test the performance of our *** proposed method can achieve satisfactory mapping results,with the F1 score,mean Intersection-over-Union(mIoU),and overall accuracy of 90.5%,85.3%,and 92.3%,*** addition,the proposed model also showed significant accuracy improvement by inputting additional topographic information(especially the slope of slope).Compared with existing algorithms(Random forests,original DeepLabV3+,and Unet),the proposed approach in this study achieved a better accuracy-efficiency ***,the method can ensure high accuracy and efficiency of the LWG mapping for different loess landform types and can be extended to study various loess gully mapping and water and soil conservation.

关键词： Loess waterworn gully Topographic information Mapping Deep learning Soil erosion Loess plateau

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基于注意力机制语义分割网络的大坝裂缝检测方法

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水利建设与管理 2024年第2期44卷 39-44页

作者：王泽焘甘肃电投河西水电开发有限责任公司甘肃张掖734000

为提高大坝裂缝检测的效率和精度,解决传统大坝裂缝检测技术人工劳动强度大、存在人身安全隐患的问题,本文提出一种基于图像视觉信息的人工智能裂缝检测技术,设计了基于注意力机制的语义分割网络,在U形网络中引入了多头注意力机制网络结... 详细信息

为提高大坝裂缝检测的效率和精度,解决传统大坝裂缝检测技术人工劳动强度大、存在人身安全隐患的问题,本文提出一种基于图像视觉信息的人工智能裂缝检测技术,设计了基于注意力机制的语义分割网络,在U形网络中引入了多头注意力机制网络结构,将移动网络V3编码器提取的特征图在多尺度上经多头注意力机制模块特征强化与解码器结果进行融合输出,精确识别裂缝对象,采用数学形态学腐蚀膨胀操作计算裂缝的几何特征。实验表明,得到的裂缝图像轮廓清晰、连续无锯齿、走向与实际相符,具有较好的检测精度。本文方法在检测大坝裂缝时省时省力、不受地形环境制约、部署方便,在准确识别大坝裂缝以及对大坝裂缝病险进行综合评判时具有一定价值。

关键词：大坝裂缝检测注意力机制特征提取形态学

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Adaptive detectors in the Krylov subspace

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Science China(Information Sciences) 2014年第10期57卷 117-127页

作者： LIU WeiJian XIE WenChong LI RongFeng wang zetao wang YongLiang College of Electronic Science and Engineering National University of Defense Technology Key Research Lab Wuhan Radar Academy

The validity of the application of the Krylov subspace techniques in adaptive filtering and detection is investigated. A new verification of the equivalence of two well-known methods in the Krylov subspace, namely the multistage Wiener filters(MWF) and the auxiliary-vector filtering(AVF), is given in this paper. The MWF and AVF are incorporated into two well-known detectors, namely, the adaptive matched filter(AMF) and Kelly’s generalized likelihood ratio test(GLRT) including their diagonally loaded versions, which form new *** to the conventional AMF, GLRT, and their diagonally loaded versions as well as the reduced-rank AMF and GLRT, the probabilities of detection(PDs) of the new detectors are improved especially when the sample support is low. More importantly, the new detectors are robust of the rank selection of the clutter subspace compared to the reduced-rank AMF and GLRT. These new detectors all possess asymptotic constant false alarm rate(CFAR) property.

关键词： adaptive matched filter(AMF) auxiliary-vector filtering(AVF) diagonal loading generalized likelihood ratio test(GLRT) Krylov subspace multistage Wiener filters(MWF)

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Effect of inlet volute wrap angle on the flow field and performance of double inlet gas cyclones

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颗粒学报:英文版 2023年第6期77卷 29-36页

作者： zetao wang Guogang Sun Zhengyuan Song Shiwei Yuan Zhen Qian College of Mechanical and Transportation Engineering China University of PetroleumBeijing102249China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China

In response to the divergent understanding of double inlet cyclone performance in the literature,the effect of inlet volute wrap angle on the performance and flow field of double inlet cyclone separator was studied by Computational Fluid Dynamic(CFD)*** results showed that the inlet volute wrap angle can affect the comparison results of the single and double inlet gas cyclones with the same total inlet cross-sectional area and velocity.0°and 90°volute double inlet improved the efficiency mainly by separating particles below 10μm,while 180°volute double inlet had no separation advantage for any particles,so the symmetrical double inlet does not always improve the efficiency,and the appropriate inlet volute wrap angle should be selected according to the actual situation,otherwise,the expected performance requirements of the symmetrical double inlet cyclone cannot be *** with the flow field,it is found that the inlet volute wrap angle changed the tangential velocity of the sym-metrical double inlet cyclone separator,thus changing the performance.

关键词： Cyclone separator Inlet volutewrapangle Efficiency Pressure drop Double inlet

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All-solid-state BiVO4/ZnIn2S4 Z-scheme composite with efficient charge separations for improved visible light photocatalytic organics degradation

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Chinese Chemical Letters 2020年第2期31卷 547-550页

作者： Deling Yuan Mengting Sun Shoufeng Tang Yating Zhang zetao wang Jinbang Qi Yandi Rao Qingrui Zhang Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China

Constructing a Z-scheme is a significant approach to improve the separation of photogene rated carriers for effective organic pollutant ***,a BiVO4/ZnIn2S4(BZ) Z-scheme composite was successfully synthesized,and applied to photodegrade methyl orange(MO) irradiated by a LED *** the BiVO4 on the ZnIn2S4 nanoparticles promoted the separation of photogenerated electronholes and broadened the light response *** detailed characterizations,including surface morphology,elements valence state,and photocurrent performance,demonstrated that the enhanced separation of photogenerated carriers was the pivotal reason for the enhanced photocatalysis *** from the excellent photocatalytic characteristics,the 5% mass ratio of BZ composite presented the highest MO degradation rate of 0.00997 min^-1,which was 1.9 and 10.3 times greater than the virgin ZnIn2S4 and BiVO4,***,the BZ hybrid materials indicated a well photo-stability in the four recycling tests.

关键词： Z-scheme composite BiVO4 ZnIn2S4 Visible light photocatalysis Charge separation Organic pollutant degradation

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Ferric ion-ascorbic acid complex catalyzed calcium peroxide for organic wastewater treatment:Optimized by response surface method

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Chinese Chemical Letters 2021年第11期32卷 3387-3392页

作者： Deling Yuan Chen Zhang Shoufeng Tang zetao wang Qina Sun Xiaoyu Zhang Tifeng Jiao Qingrui Zhang Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse Hebei Key Laboratory of Applied ChemistrySchool of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China

Hydrogen peroxide(H_(2)O_(2))disproportionation,iron precipitation,and narrow pH range are the drawbacks of traditional Fenton *** surmount these barriers,we proposed a ferric ion(Fe^(3+))-ascorbic acid(AA)complex catalyzed calcium peroxide(CaO_(2))Fenton-like system to remove organic dyes in *** collaborative Fe^(3+)/AA/CaO_(2)system presented an obvious improvement in the methyl orange(MO)decolorization,and also effectively eliminated other *** surface method was employed to optimize the running parameters for this coupling *** the optimized arguments(2.76 mmol/L Fe^(3+),0.68 mmol/L AA,and 4 mmol/L CaO_(2)),the MO removal achieved 98.90%after 15 min at pH 6.50,which was close to the computed outcome of 99.30%.Furthermore,this Fenton-like system could perform well in a wide range of pH(3-11),and enhance the H_(2)O_(2)decomposition and Fe ions *** scavenger experiment result indicated that hydroxyl radical,superoxide anion free radical,and singlet oxygen were acted on the dye ***,electron spin resonance analysis corroborated that the existences of these active species in the Fe^(3+)/AA/CaO_(2)*** study could advance the development of Fenton-like technique in organic effluent disposal.

关键词： Ferric ion Ascorbic acid Calcium peroxide Response surface method Dye removal

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Study on the Relationship between Structural Aspects and Aerodynamic Characteristics of Archimedes Spiral Wind Turbines

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Fluid Dynamics & Materials Processing 2024年第7期20卷 1517-1537页

作者： Yuanjun Dai zetao Deng Baohua Li Lei Zhong Jianping wang Mechanical and Electrical Engineering Institue Xinjiang Agricultural UniversityUrumqi830052China College of Mechanics Shanghai DianJi UniversityShanghai201306China School of Energy Engineering Xinjiang Institute of EngineeringUrumqi830023China

A combined experimental and numerical research study is conducted to investigate the complex relationship between the structure and the aerodynamic performances of an Archimedes spiral wind turbine(ASWT).Two ASWTs are considered,a prototypical version and an improved *** is shown that the latter achieves the best aerodynamic performance when the spread angles at the three sets of blades areα_(1)=30°,α_(2)=55°,α3=60°,respectively and the blade thickness is 4 *** a velocity V=10 m/s,a tip speed ratio(TSR)=1.58 and 2,the maximum CP values are 0.223 and 0.263 for the prototypical ASWT and improved ASWT,respectively,and the maximum C_(P) enhancement is 17.93%.For V=10 m/s and TSR=2,the CP values of the prototypical ASWT and improved ASWT are 0.225 and 0.263,respectively,with an aerodynamic performance enhancement of 16.88%.Through mutual verification of the test outcomes and numerical results,it is concluded that the proposed approach can effectively lead to aerodynamic performance improvement.

关键词： Archimedes spiral wind turbine aerodynamic performance numerical calculation

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基础加固施工对重载铁路桥梁静动力性能影响研究

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石家庄铁道大学学报（自然科学版） 2024年第2期37卷 7-13页

作者：陈树礼祁鉴全王泽涛张建功李夷豪石家庄铁道大学安全工程与应急管理学院河北石家庄050043 石家庄铁道大学河北省大型结构健康诊断与控制重点实验室河北石家庄050043 石家庄铁道大学土木工程学院河北石家庄050043

铁路桥梁墩台基础加固施工会改变桥墩约束状态,影响结构稳定和列车运营安全。以某重载铁路轻型桥墩基础加固工程为背景,采用数值模拟和试验测试手段,研究各关键施工环节对桥墩和桥跨结构稳定性、刚度和振动响应的影响规律。研究结果表明... 详细信息

铁路桥梁墩台基础加固施工会改变桥墩约束状态,影响结构稳定和列车运营安全。以某重载铁路轻型桥墩基础加固工程为背景,采用数值模拟和试验测试手段,研究各关键施工环节对桥墩和桥跨结构稳定性、刚度和振动响应的影响规律。研究结果表明,基础加固施工分为钻孔桩施工、基础侧土体开挖、基础混凝土浇筑、墩身连接等4个关键施工步骤,其中土体开挖会导致桥墩稳定性和横向刚度降低,随开挖深度增加,两者均逐渐降低,而混凝土浇筑则引起桥墩刚度和稳定性逐渐增加,桥墩横向连接加固则引起墩身刚度显著增大,增幅达到32%;整个施工阶段中,土体开挖引起桥梁结构振动响应显著增大,其他加固环节对桥梁振动响应不明显;施工过程中,列车轴重、速度、桥墩高度是影响桥梁动力响应的最敏感因素,随列车轴重和速度以及桥墩高度增加,桥梁动力响应增大明显。

关键词：基础加固重载铁路桥梁高度静动力性能数值模拟加固试验

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重载铁路双柱式桥墩加固技术优化研究

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石家庄铁道大学学报（自然科学版） 2024年第1期37卷 1-8页

作者：陈树礼李夷豪张建功王泽涛祁鉴全石家庄铁道大学安全工程与应急管理学院河北石家庄050043 石家庄铁道大学河北省大型结构健康诊断与控制重点实验室河北石家庄050043 石家庄铁道大学土木工程学院河北石家庄050043

为探索基于性能提升的桥墩加固优化设计方法,以重载铁路中数量较多的分离式双柱式桥墩为对象,基于数值模拟分析和桥墩加固运营性能试验,开展3种常用方法加固条件下的桥墩静力性能对比分析和动力性能对比试验研究,并进行加固技术优化研究... 详细信息

为探索基于性能提升的桥墩加固优化设计方法,以重载铁路中数量较多的分离式双柱式桥墩为对象,基于数值模拟分析和桥墩加固运营性能试验,开展3种常用方法加固条件下的桥墩静力性能对比分析和动力性能对比试验研究,并进行加固技术优化研究.结果表明,设计荷载作用下,墩身外包加固抑制墩顶水平位移效果较好,而"增大基础和增补桩基"组合加固则能有效减少基底截面应力;运营列车作用下,3种方法加固条件的墩顶横向振幅较加固前均有不同程度降低,但也有部分桥墩受施工等因素影响出现振幅增大的情况.采用优化提出的"增大基础+增补桩基+墩身外包"三重加固法,墩顶横向振幅降低幅度超过50%,能够很好地满足重载铁路双柱式桥墩强化改造需求.

关键词：重载铁路双柱式桥墩加固技术数值模拟现场试验优化设计

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基于遗传算法的Docker集群调度策略

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华南理工大学学报（自然科学版） 2018年第3期46卷 127-133页

作者：林伟伟王泽涛华南理工大学计算机科学与工程学院广东广州510006

Docker集群技术因其轻量级、部署简单、高效等特点而成为构建云计算平台的新方案.为了提升传统Docker集群调度策略的负载均衡性能和增加多任务并发调度能力,文中提出了基于遗传算法的Docker集群调度策略.该策略将多个任务合并成一个调度... 详细信息

Docker集群技术因其轻量级、部署简单、高效等特点而成为构建云计算平台的新方案.为了提升传统Docker集群调度策略的负载均衡性能和增加多任务并发调度能力,文中提出了基于遗传算法的Docker集群调度策略.该策略将多个任务合并成一个调度组,并生成相应调度结果作为种群个体;然后结合任务负载模式、节点当前负载状态及硬件性能计算集群负载均衡值并作为个体适应度;最后利用遗传算法筛选出全局近似最优解作为调度结果.实验结果表明,文中策略与目前流行的Docker Swarm的Spread策略、权值调度策略相比,负载均衡性能和多任务调度效率均有了显著的提高.

关键词： Docker 容器技术调度策略遗传算法负载均衡

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