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A LiDAR Point Clouds Dataset of Ships in a Maritime Environment

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IEEE/CAA Journal of Automatica Sinica 2024年第7期11卷 1681-1694页

作者： Qiuyu zhang lipeng Wang Hao Meng Wen zhang Genghua Huang the College of Intelligent Systems Science and Engineering Harbin Engineering UniversityHarbin 150001China Key Laboratory of Space Active Opto-Electronics Technology Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China

For the first time, this article introduces a LiDAR Point Clouds Dataset of Ships composed of both collected and simulated data to address the scarcity of LiDAR data in maritime applications. The collected data are acquired using specialized maritime LiDAR sensors in both inland waterways and wide-open ocean environments. The simulated data is generated by placing a ship in the LiDAR coordinate system and scanning it with a redeveloped Blensor that emulates the operation of a LiDAR sensor equipped with various laser beams. Furthermore,we also render point clouds for foggy and rainy weather conditions. To describe a realistic shipping environment, a dynamic tail wave is modeled by iterating the wave elevation of each point in a time series. Finally, networks serving small objects are migrated to ship applications by feeding our dataset. The positive effect of simulated data is described in object detection experiments, and the negative impact of tail waves as noise is verified in single-object tracking experiments. The Dataset is available at https://***/zqy411470859/ship_dataset.

关键词： 3D point clouds dataset dynamic tail wave fog simulation rainy simulation simulated data

Adakitic rocks associated with the Shilu copper–molybdenum deposit in the Yangchun Basin,South China,and their tectonic implications

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Acta Geochimica 2017年第2期36卷 132-150页

作者： lipeng zhang Yongbin Hu Jinlong Liang Trevor Ireland Youliang Chen Rongqing zhang Saijun Sun Weidong Sun CAS Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China University of Chinese Academy of Sciences Beijing 100094 China Department of Geochemistry Chengdu University of Technology Chengdu 610059 China Research School of Earth Sciences The Australian National University Bldg 61 Mills Road Acton ACT Canberra ACT 0200 Australia Center of Deep Sea Research Institute of Oceanography Chinese Academy of Sciences Qingdao 266071 China CAS Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of Science Beijing 100101 China

South China is famous for the extensive magmatism and polymetallic mineralization that took place there in the Mesozoic. Shilu is a large porphyry–skarn Cu–Mo deposit in the Yangchun Basin, South China. The lithology of the Shilu intrusion is granodiorite and quartz diorite, both of which are high-K calc-alkaline series, with high Sr([400 ppm) content along with low Y and Yb contents. Most of the samples have characteristics of adakite except for a few samples that have slightly higher Y and Yb contents, which may be plausibly explained by crustal contamination. Laser Ablation Inductively Coupled Plasma Mass Spectrometry zircon U–Pb dating revealed ages between 106.6 ± 1.3 and 103.9 ± 0.5 Ma, with multiple magmatic pulses. Molybdenite Re–Os isochron age of 102.2 ± 2.9 Ma(MSWD = 9.4) was determined, which is identical to the youngest zircon U–Pb age(103.9 ± 0.5 Ma) within *** Shilu intrusion has high oxygen fugacity as indicated by high zircon Ce^(4+)/Ce^(3+) and Eu_N/Eu_N* ratios. Considering the geochemical characteristics(high Sr, and low Y and Yb contents), high oxygen fugacity, and copper mineralization of the Shilu intrusion, it was most likely formed by partial melting of a subducted young oceanic slab. Whole-rock Sr–Nd isotope-, zircon Hf isotope-, and whole-rock trace element analyses show that Shilu adakitic magmas may have interacted with type II enriched mantle and/or crustal materials during ascent. South China was affected by the Pacific tectonic regime to the east and the Neo-Tethys tectonic regime to the south in the Cretaceous. Based on the Pacific Plate drifting and rotation history, it is hard to explain how the Pacific Plate would have subducted and melted, forming adakitic rocks in the Shilu region. Considering the tectonic history of Southeast Asia and the South China Sea, the Neo-Tethys trench should have been much closer to the South China Block in the Cretaceous, and thus have had a greater impact on the South China Block. Based on the

关键词： Shilu deposit Adakitic rocks Cretaceous Neo-Tethys South China

Combustion and Self-Desulfurization Characterization of Blended Low-Rank Coals for Improved Resource Utilization in Fluidized Bed Boilers

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Journal of Thermal Science 2024年第3期33卷 1242-1256页

作者： SU lipeng zhang Cong zhang Yongsheng WANG Tao WANG Jiawei Key Laboratory of Power Station Energy Transfer Conversion and System Ministry of EducationNorth China Electric Power UniversityBeijing102206China

The co-combustion of low-rank coals through fluidized bed boiler(CFB)is an effective approach to enhance the level of resource *** date,there has been a lack of investigation concerning the co-combustion kinetics and self-desulfurization characteristics of coal slime,coal gangue,and raw *** this study,we adopted multiple model-free and model-fitting methods to comparatively analyze co-combustion kinetics of blended coals on the basis of thermogravimetric ***,the sulfur balance and self-desulfurization of blended coals in the co-combustion were intensively investigated using a tube furnace *** results reveal that in the presence of coal gangue in blended coals,the average activation energy(E_(a))falls within the range of 65.7 kJ/mol to 100.4 kJ/mol,as determined by four model-free ***,in the absence of coal gangue,only the Flynn-Wall-Ozawa(FWO)and Friedman(FM)methods are deemed appropriate for calculating the average E_(a),yielding a value of 77.3 kJ/*** first order reaction model is confirmed to be reliable for analyzing the co-combustion kinetics of low-rank blended *** of the specific composition of the blended coal,a significant linear correlation exists between the Ea and the natural logarithm of the pre-exponential factor(lnA)within an extensive range of ***,the addition of coal gangue to the blended coal substantially enhances the self-desulfurization level,resulting in an increase from 25.7%to60.7%at 1073 *** self-desulfurization efficiency exhibits a good linear relationship with both the mass ratio of coal gangue to coal slime and the molar ratio of calcium to *** a practical implementation,the optimal addition ratio of coal gangue is a trade-off between the self-desulfurization efficiency and the ignition capacity.

关键词： coal slime coal gangue fluidized bed boilers self-desulfurization resource utilization

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水利监督安全巡查发现问题分析及建议

水利技术监督 2024年第1期 3-6页

作者：张李朋李景双章志明叶国平浙江省水利水电技术咨询中心浙江杭州310020 浙江省水利水电建筑监理有限公司浙江杭州310020

为推动水利行业安全管理水平全面提档升级,全方位筑牢安全生产监管链条。文章以浙江省水利安全巡查工作为例,简要介绍安全巡查考核对象、工作方式和工作流程,归纳总结督查发现的问题及其典型表现,分析问题形成原因,并有针对性的提出监... 详细信息

为推动水利行业安全管理水平全面提档升级,全方位筑牢安全生产监管链条。文章以浙江省水利安全巡查工作为例,简要介绍安全巡查考核对象、工作方式和工作流程,归纳总结督查发现的问题及其典型表现,分析问题形成原因,并有针对性的提出监管建议,对促进水利行业安全管理工作质效双升,全力遏制各类安全事故发生具有重要意义。

关键词：水利监督安全巡查问题分类监管建议

Geochemical and Zircon Hf-O Isotopic Constraints on the Origin of Wulian A-Type Granite in Shandong Peninsula,Eastern China

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Journal of Earth Science 2022年第3期33卷 609-622页

作者： Shuai Yuan He Li lipeng zhang Congying Li Haiyang Liu Ying-Yu Xue Weidong Sun Center of Deep Sea Research Institute of OceanologyCenter for Ocean Mega-ScienceChinese Academy of SciencesQingdao 266071China Laboratory for Marine Mineral Resources Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China School of Marine Sciences University of Chinese Academy of SciencesBeijing 100049China

Early Cretaceous A-type granitic plutons are widely distributed in Shandong Peninsula,which are of great significance to understanding the regional tectonic *** we report geochemical characteristics,geochronological results,and zircon Hf-O isotope compositions of Wulian granites to reveal its origin and geological *** granites share most characteristics of the A_(2)-type *** U-Pb LA-ICPMS analysis for Wulian A-type granites yields average age of 116.6±2.1 *** O isotope values range from 4.20‰to 5.57‰,and these values are marginally identical to or slightly lower than those of mantle zircon(5.3‰±0.3‰).Zirconε_(Hf)(t)values(-26.1--23.5)indicate an enriched *** zircon Hf-O isotope compositions indicate that the source region of Wulian granites involves the components of ancient oceanic *** from Wulian granites have the lower chlorine(0.06 wt.%-0.15 wt.%)and higher fluorine contents(2.11 wt.%-2.48 wt.%)compared with Haiyang pluton,together with their high(La/Gd)_(N),(La/Yd)_(N) and low(Gd/Yb)_(N) ratios and high oxygen state magma reflected from zircon,signifying that slab derived component was added into the overlying mantle region through fluid/*** geochemical characteristics of Wulian granites could be explained by the ridge(between the Izanagi and Pacific plates)subduction model,which began to influence the tectonic evolution of the Xuhuai region and Shandong Peninsula since~130±5 *** following slab window between two plates plausibly explains regional extension,resulting in hot magma upwelling and the formation of the A-type granite *** the Lower Yangtze River belt and Shandong Peninsula A-type granite proves the northward movement of the ridge between the Pacific Plate and Izanagi Plate.

关键词： A-type granite Shandong Peninsula ridge subduction zircon Hf-O isotope magma

复发性流产患者ILC2与Th17/Treg比值的相关性研究

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中国计划生育和妇产科 2024年第9期16卷 66-69页

作者：张力鹏马俊旗林玉婷新疆医科大学第一附属医院妇科中心新疆乌鲁木齐830011 乌鲁木齐市妇幼保健院检验科新疆乌鲁木齐830000

目的探讨复发性流产患者中2型固有淋巴细胞(ILC2)的作用及其与Th17/Treg比值的相关性。方法选取2022年10月至2023年10月新疆医科大学第一附属医院妇科中心门诊复发性流产患者30例为复发性流产组,另选取同期正常妊娠者30例为正常妊娠组... 详细信息

目的探讨复发性流产患者中2型固有淋巴细胞(ILC2)的作用及其与Th17/Treg比值的相关性。方法选取2022年10月至2023年10月新疆医科大学第一附属医院妇科中心门诊复发性流产患者30例为复发性流产组,另选取同期正常妊娠者30例为正常妊娠组、孕龄期体检正常且未孕女性30例为备孕期妇女组。采用流式细胞术检测各组外周血中ILC2占CD45+细胞比例、Th17和Treg细胞分别占CD4+T淋巴细胞比例,Pearson法分析复发性流产患者ILC2与Th17/Treg比值的相关性。结果与备孕期妇女组(0.634%±0.064%)和正常妊娠组(0.570%±0.028%)比较,复发性流产组(1.457%±0.887%)外周血中ILC2的比例明显升高,差异有统计学意义(P0.05)。与正常妊娠组和备孕期妇女组比较,复发性流产组中Th17细胞占CD4+T细胞的比例明显增高,Treg细胞比例明显降低,差异有统计学意义(P<0.05),正常妊娠组与备孕期妇女组比较,Th17细胞和Treg细胞比例差异均无统计学意义。相关性分析显示复发性流产组ILC2与Th17/Treg比值呈正相关(r=0.798,P<0.001)。结论复发性流产患者外周血中ILC2和Th17细胞比例升高,Treg细胞比例降低,且ILC2与Th17/Treg比值呈正相关,这提示ILC2参与复发性流产的发生发展,影响正常妊娠,且复发性流产可能与Th17/Treg失衡有关。

关键词：复发性流产 ILC2 正常妊娠备孕期妇女 Th17/Treg比值

Determination of large diameter bored pile's effective length based on Mindlin's solution

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Journal of Traffic and Transportation Engineering(English Edition) 2015年第6期2卷 422-428页

作者： Zhijun Zhou Duanduan Wang lipeng zhang Weisi Ma School of Highway Chang'an University Department of Civil Engineering University of Illinois at Urbana-Champaign

The calculation equation of large diameter bored pile＇s effective length is connected with its distribution of pile shaft resistance. Thus, there is a great difference between the calculation results under the different distributions of pile shaft resistance. Primarily, this paper summarizes the conceptualized mode of pile shaft resistance under the circum- stance that the soil surrounding the piles presents different layer distributions. Secondly, based on Mindlin＇s displacement solution and in consideration of the effect of pile diam- eter, the calculation equation is optimized with the assumption that the pile shaft resis- tance has a parabolic distribution. The influencing factors are analyzed according to the calculation result of effective pile length. Finally, combined with an engineering example, the calculation equation deduced in this paper is analyzed and verified. The result shows that both the Poisson ratio of soil and pile diameter have impacted the effective pile length. Compared with the Poisson ratio of soil, the effect of pile diameter is more significant. If the pile diameter remains the same, the effect of the Poisson ratio of soil to the effective pile length decreases as the ratio of pile elastic modulus and soil share modulus increases. If the Poisson ratio of soil remains the same, the effect of the pile diameter to the effective pile length increases as the ratio of pile elastic modulus and soil share modulus increases. Thus the optimized calculation result of pile effective length under the consideration of pile diameter effect is more close to the actual situation of engineering and reasonably practicable.

关键词： Large diameter bored pile Pile shaft resistance Parabolic distribution Mindlin's solution Effect of pile diameter Effective pile length

Genesis of High Ba-Sr Yashan Intrusion from the Jiaodong Peninsula,Eastern China:Implications for the Destruction of the North China Craton

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Journal of Earth Science 2022年第3期33卷 567-580页

作者： Guozhi Xie lipeng zhang Jie Li Zhongyi Bao Kun Wang Qian Chen Li Wang Jingwei Wang Center of Deep Sea Research Institute of OceanologyCenter for Ocean Mega-ScienceChinese Academy of SciencesQingdao 266071China Laboratory for Marine Mineral Resources Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China School of Marine Sciences University of Chinese Academy of SciencesBeijing 100049China School of Resources Hebei GEO UniversityShijiazhuang 050031China Shandong Provincial No.6 Exploration Institute of Geology and Mineral Resources Weihai 264209China Rizhao Natural Resources and Planning Bureau Rizhao 276800China

The origin of the Mesozoic high Ba-Sr(HBS)granitic magmatism in the Jiaodong Peninsula remains controversial in petrogenesis models and geodynamic ***,we report zircon UPb age,trace element and oxygen isotope compositions,and whole-rock major-trace element and Sr-Nd isotope compositions of the HBS Yashan *** zircon U-Pb age of~118 Ma denotes that the Yashan granodiorite belongs to the Weideshan-stage magmatic activity,which is consistent with the age of Mo mineralization in the Yashan *** low Sr/Y(48.8-115)and high(La/Yb)_(N)(23.8-50.4)ratios of the Yashan granodiorite are analogous to adakitic features derived from the *** is also supported by the whole-rock initial^(87)Sr/^(86)Sr ratios(0.7096-0.7103)and zircon δ^(18) O values(6.79‰-8.03‰).Contemporaneous mantle-derived mafic microgranular enclaves indicate the involvement of the metasomatized lithospheric *** high magma oxygen fugacity of the Yashan intrusion as indicated by high zircon Ce^(4+)/Ce^(3+) values suggests the involvement of plate *** obviously lower Dy/Yb,La/Yb and Sr/Y ratios of magmatic rocks in the Weideshan-stage than those in the early-stage imply lithospheric thinning of the eastern North China *** propose that the Yashan HBS granodiorite was formed by crust-mantle interactions during slab rollback.

关键词： Yashan magmatic intrusion high Ba-Sr Jiaodong Peninsula crust-mantle interaction North China Craton

Geochemistry of subducted metabasites exhumed from the Mariana forearc:Implications for Pacific seamount subduction

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Geoscience Frontiers 2021年第3期12卷 358-369页

作者： Jianghong Deng lipeng zhang He Liu Haiyang Liu Renqiang Liao Abdul Shakoor Mastoi Xiaoyong Yang Weidong Sun Center of Deep Sea Research Institute of OceanologyCenter for Ocean Mega-ScienceChinese Academy of SciencesQingdao 266071China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China CAS Key Laboratory of Crust-Mantle Materials and Environments University of Science and Technology of ChinaHefei 230026China University of Chinese Academy of Sciences Beijing 100049China Centre for Pure and Applied Geology University of SindhJamshoro 76080Pakistan

Seamounts on the drifting oceanic crust are inevitably carried by plate motions and eventually accreted or ***,the geochemical signatures of the subducted seamounts and the significance of seamount subduction are not well *** of seamounts have subducted beneath the Philippine Sea Plate following the westward subduction of the Pacific Plate since the Eocene(~52 Ma).The subducted oceanic crust and seamount materials can be exhumed from the mantle depth to the seafloor in the Mariana forearc region by serpentinite mud volcanoes,providing exceptional opportunities to directly study the subducted oceanic crust and *** International Ocean Discovery Program(IODP)expedition 366 has recovered a few metamorphosed mafic clasts exhumed from the Mariana forearc serpentinite mud volcanoes,e.g.,the Fantangis?a and Asùt Tesoru *** mafic clasts have tholeiitic to alkaline affinities with distinct trace elements and Nd-Hf isotopes characteristics,suggesting different provenances and mantle *** tholeiites from the Fantangisna Seamount have trace element characteristics typical of mid-ocean ridge *** Pacific-type Hf-Nd isotopic compositions,combined with the greenschist metamorphism of these tholeiites further suggest that they came from the subducted Pacific oceanic *** alkali basalts-dolerites from the Fantangisna and Asùt Tesoru seamounts show ocean island basalt(OIB)-like geochemical *** OIB-like geochemical signatures and the low-grade metamorphism of these alkali basalts-dolerites suggest they came from subducted seamounts that originally formed in an intraplate setting on the Pacific *** Pacific Plate origin of these metabasites suggests they were formed in the Early Cretaceous or *** types of OIBs have been recognized from alkali metabasites,one of which is geochemically similar to the HIMU-EMI-type OIBs from the West Pacific Seamount Province,and another is similar to the EM

关键词： IODP 366 Mariana convergent margin Forearc Seamount subduction OIB