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Journal of the Operations Research Society of China 2024年第2期12卷 495-504页

作者： Hong-Ye Zheng Suo-gang gao Wen Liu Bo Hou School of Mathematical Sciences Hebei Normal UniversityShijiazhuang 050024HebeiChina

In this paper,we consider the parallel-machine customer order scheduling with delivery time and submodular rejection *** this problem,we are given m dedicated machines in parallel and n customer *** order has a delivery time and consists of m product types and each product type should be manufactured on a dedicated *** order is either rejected,in which case a rejection penalty has to be paid,or accepted and manufactured on the m dedicated *** objective is to find a solution to minimize the sum of the maximum delivery completion time of the accepted orders and the penalty of the rejected orders which is determined by a submodular *** design an LP rounding algorithm with approximation ratio of n+1 for this problem.

关键词： Order scheduling Delivery time Submodular rejection penalty Approximation algorithm

Geochemical identification of a source rock affected by migrated hydrocarbons and its geological significance:Fengcheng Formation,southern Mahu Sag,Junggar Basin,NW China

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Petroleum Science 2024年第1期21卷 100-114页

作者： Wen-Long Dang gang gao Xin-Cai You Ke-Ting Fan Jun Wu De-Wen Lei Wen-Jun He Yong Tang State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum(Beijing)Beijing102249China School of GeoSciences China University of Petroleum(Beijing)Beijing102249China Exploration&Development Institute Xinjiang Oil Field CompanyKaramay834000XinjiangChina

The Fengcheng Formation is a crucial source rock and the primary reservoir for oil accumulation in the Mahu *** oils are distributed throughout the Fengcheng Formation,ranging from the edge to the interior of the sag in the southern Mahu *** crude oils originate from in-situ source rocks in shallowly buried areas and the inner deep *** migration,the crude oil from the inner deep sag affects the source rocks close to carrier beds,leading to changes in the organic geochemical characteristics of the source *** changes might alter source rock evaluations and oil-source *** on data such as total organic carbon(TOC),Rock-Eval pyrolysis of source rocks,and gas chromatography-mass spectrometry(GC-MS)of the saturated fraction,and considering the geological characteristics of the study area,we define the identification characteristics of source rock affected by migrated hydrocarbons and establish the various patterns of influence that migrated hydrocarbons have on the source rock of the Fengcheng Formation in the southern Mahu *** source rocks of the Fengcheng Formation are mostly fair to good,containing mainly Type II organic matter and being thermally mature enough to generate *** rocks affected by migrated hydrocarbons exhibit relatively high hydrocarbon contents(S1/TOC>110 mg HC/g TOC,Extract/TOC>30%,HC:hydrocarbon),relatively low Rock-Eval Tmax values,and relatively high tricyclic terpane contents with a descending and mountain-shaped ***,biomarker composition parameters indicate a higher thermal maturity than in-situ source *** a comparison of the extract biomarker fingerprints of adjacent reservoirs and mudstones in different boreholes,three types of influence patterns of migrated hydrocarbons are identified:the edge-influence of thin sandstone-thick mudstone,the mixed-influence of sandstone-mudstone interbedded,and the full-influence of thick sandstone-thin *** finding reminds

关键词： Organic geochemistry Source rock Influence of migrated hydrocarbons Fengcheng Formation Southern Mahu Sag

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Enhancing solar-driven overall water splitting via both sacrifice and noble metal free photocatalysis: copper cluster/boron-doped carbon nitride catalysts

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Science China Chemistry 2024年第11期67卷 3886-3896页

作者： Yun-Dong Cao Yuxi Zhang Jian Song Hong Liu Zhiyuan Song Lin-Lin Fan Cai-Li Lv Guang-gang gao School of Materials Science and Engineering University of Jinan

The major impediment to the additional industrialization of water splitting is the high cost of the co-catalyst made of noble metals and the sacrificial reagent. A binary photocatalytic system, consisting of B-doped g-C3N4nanosheets(Cu20@BCN-X) and atomically accurate copper clusters, is designed in this study. The copper clusters serve as co-catalysts for H2evolution and exhibit Pt-like activity, whereas the nanosheets serve as carriers and semiconductor components for O2evolution. Such binary system, created using simple techniques, demonstrates hydrogen bonding interactions that promote synergistic effects and efficient binding and charge transfer across the interface between the two components. Band position manipulation of carbon nitride nanosheets demonstrates a Z-scheme charge transfer mechanism between the nanosheets and copper clusters. This photocatalytic system can accomplish the photocatalytic overall water splitting process(259.9 μmol g-1h-1of H2and 129.4 μmol g-1h-1of O2) without using sacrificial agents or noble metal co-catalysts. This work lays the foundation for the design of overall water splitting catalysts by precisely manipulating the energy levels, and it also paves the way for commercialized photocatalytic catalysts that do not require noble metals or sacrificial chemicals.

关键词： copper clusters band modulation photocatalysts water splitting

Nanodiamond reinforced self-healing and transparent poly(urethane-urea)protective coating for scratch resistance

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International Journal of Smart and Nano Materials 2024年第1期15卷 75-94页

作者： Zhuochao Wang Wenxin Cao Chunqiang Sun Dongchao Ji Kunlong Zhao gang gao Xingchun Xu Yingqi Liu Tianyu Zhang Jiaqi Zhu Jiecai Han National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbinChina School of future technology Harbin institute of TechnologyHarbinChina Key Laboratory of Micro-systems and Micro-structures Manufacturing Ministry of EducationHarbinChina

With increasing demand for scratch-resistant flexible electro-nics,the development of transparent coatings with good scratch resistance and self-healing properties has emerged as a key research *** this study,a high-strength self-healing poly(urethane-urea)(PUU)-based nanocomposite coating was prepared by introducing functionalized nanodiamond(ND)into a PUU matrix via solution *** PUU matrix had hard-segment repeating units and was constructed using iso-phorone diamine and isophorone *** ND particles were modifed using a silane coupling agent,3-aminopropyl-triethoxysilane,to obtain well-dispersed KH-ND ***-ND promoted microphase separation in the PU matrix,inducing the formation of dense and homogeneous hard domains that dissipated stress,prevented further crack devel-opment,and improved the mechanical properties and scratch resistance of the *** addition,the coating exhibited excellent self-healing ***-transform infrared spectroscopy,scanning electron microscopy,and atomic force microscopy were used to characterize the self-healing and hardening mechanisms of the *** environmentally friendly PUU/KH-ND coating is easy to prepare and has broad application prospects in transparent and anti-scratch coatings for flexible electronics,automobiles,and home appliances.

关键词： Nanocomposite coatings self-healing scratch resistance transparent poly(urethane-urea)

Sedimentary environment shift and organic matter enrichment mechanism in response to volcanic ash influence: A case study of the Permian Lucaogou Formation, Santanghu Basin,NW China

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Journal of Palaeogeography 2024年第4期13卷 793-822页

作者： Miao Yu gang gao Miao Liu Hui Liang Ji-Lun Kang Xiong-Fei Xu Xin-Ying Zhao College of Geosciences China University of Petroleum (Beijing) National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum (Beijing) Petro China Tuha Oilfield Company

The second member of the Lucaogou Formation （P2l2） in the Tiaohu and Malang Sags of the Santanghu Basin （study area） underwent periodic volcanic activity and frequent lithological *** study comprehensively analyzed the organic geochemistry,mineral composition,organic matter （OM） types,volcanic cycle,and palaeoenvironment of shale in the study *** such as total organic carbon （TOC）,rock pyrolysis （Rock-Eval）,organic petrology,scanning electron microscopy （SEM） with energydispersive spectrum （EDS） analysis,X-ray diffraction （XRD）,trace elements,and saturated hydrocarbon gas chromatography and mass spectrometry （GC-MS） were *** findings suggest that limited terrigenous input during the sedimentary period of the P2l2led to the deposition of a distinctive mixture of volcanic ash （felsic） and carbonate （dolomite and calcite）,with a low average clay mineral content of 6%.The P2l2shale emerged as a high-quality source rock,predominantly composed of type I and II kerogens,with moderate OM *** deposition environment was characterized by hot and arid conditions,high salinity,and intensive reducibility,which was favorable for algae development and conducive to OM ***,two lamalginite types,labeled as lamalginite“A”and lamalginite“B,”were ***“B”-rich shales were deposited in a hotter and drier climate compared to lamalginite“A”-rich ***“B”-rich shale inexhibited high levels of C28regular sterane and β-carotenes,distinguishing it from lamalginite“A”-rich shale.A comprehensive analysis involving organic petrology,SEM,sedimentary environment,and biomarker characteristics suggests that lamalginite“B”may be a salt-tolerant green alga,while lamalginite“A”may be a ***,an OM enrichment model for the P2l2shale was established.

关键词： Volcanic ash Geochemistry Petrology Palaeoenvironment Lamalginite

Severe pediatric COVID‑19:a review from the clinical and immunopathophysiological perspectives

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World Journal of Pediatrics 2024年第4期20卷 307-324页

作者： Yi‑Kan Sun Can Wang Pei‑Quan Lin Lei Hu Jing Ye Zhi‑gang gao Ru Lin Hao‑Min Li Qiang Shu Li‑Su Huang Lin‑Hua Tan Children's Hospital Zhejiang University School of MedicineHangzhou 310052China The Second Affiliated Hospital Zhejiang University School of MedicineHangzhou 310030China Surgical Intensive Care Unit Children’s HospitalZhejiang University School of MedicineHangzhou 310052China Department of General Surgery Children’s HospitalZhejiang University School of MedicineHangzhou 310052China Department of Cardiopulmonary and Extracorporeal Life Support Children’s HospitalZhejiang University School of MedicineHangzhou 310052China Clinical Data Center Children’s HospitalZhejiang University School of MedicineHangzhou 310052China Department of Cardiac Surgery Children’s HospitalZhejiang University School of MedicineHangzhou 310052China National Clinical Research Center for Child Health Children’s HospitalZhejiang University School of MedicineHangzhou 310052China Department of Infectious Diseases Children’s HospitalZhejiang University School of MedicineHangzhou 310052China

Background Coronavirus disease 2019(COVID-19)tends to have mild presentations in ***,severe and critical cases do arise in the pediatric population with debilitating systemic impacts and can be fatal at times,meriting further attention from ***,the intricate interactions between the pathogen virulence factors and host defense mechanisms are believed to play indispensable roles in severe COVID-19 pathophysiology but remain incompletely *** sources A comprehensive literature review was conducted for pertinent publications by reviewers independently using the PubMed,Embase,and Wanfang *** keywords included“COVID-19 in children”,“severe pediatric COVID-19”,and“critical illness in children with COVID-19”.Results Risks of developing severe COVID-19 in children escalate with increasing numbers of co-morbidities and an unvaccinated *** respiratory distress stress and necrotizing pneumonia are prominent pulmonary manifestations,while various forms of cardiovascular and neurological involvement may also be *** immunological processes are implicated in the host response to COVID-19 including the type I interferon and inflammasome pathways,whose dysregulation in severe and critical diseases translates into adverse clinical *** inflammatory syndrome in children(MIS-C),a potentially life-threatening immune-mediated condition chronologically associated with COVID-19 exposure,denotes another scientific and clinical conundrum that exemplifies the complexity of pediatric *** the considerable dissimilarities between the pediatric and adult immune systems,clinical trials dedicated to children are lacking and current management recommendations are largely adapted from adult *** Severe pediatric COVID-19 can affect multiple organ *** dysregulated immune pathways in severe COVID-19 shape the disease course,epitomize the vast functional diversity of the

关键词： Immunopathophysiology MIS-C Pediatric critical care Severe pediatric COVID-19

Preliminary exploration of animal models of congenital choledochal cysts

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World Journal of Gastroenterology 2024年第10期30卷 1420-1430页

作者： Shu-Hao Zhang Yue-Bin Zhang Duo-Te Cai Tao Pan Ken Chen Yi Jin Wen-Juan Luo Zong-Wei Huang Qing-Jiang Chen Zhi-gang gao Department of General Surgery Children’s HospitalZhejiang University School of MedicineHangzhou 310000Zhejiang ProvinceChina

BACKGROUND Various animal models have been used to explore the pathogenesis of choledochal cysts(CCs),but with little convincing *** surgical techniques can achieve satisfactory outcomes for treatment of ***,recent studies have focused more on clinical issues rather than basic ***,we need appropriate animal models to further basic *** To establish an appropriate animal model that may contribute to the investigation of the pathogenesis of *** Eighty-four specific pathogen-free female Sprague-Dawley rats were randomly allocated to a surgical group,sham surgical group,or control group.A rat model of CC was established by partial ligation of the bile *** reliability of the model was confirmed by measurements of serum biochemical indices,morpho-logy of common bile ducts of the rats as well as molecular biology experiments in rat and human *** Dilation classified as mild(diameter,≥1 mm to<3 mm),moderate(≥3 mm to<10 mm),and severe(≥10 mm)was observed in 17,17,and 2 rats in the surgical group,respectively,while no dilation was observed in the control and sham surgical *** levels of alanine aminotransferase,aspartate aminotrans-ferase,total bilirubin,direct bilirubin,and total bile acids were significantly elevated in the surgical group as compared to the control group 7 d after surgery,while direct bilirubin,total bilirubin,and gamma-glutamyltransferase were further increased 14 d after *** of the biochemical indices gradually decreased to normal ranges 28 d after *** protein expression trend of signal transducer and activator of transcription 3 in rat model was consistent with the human CC *** The model of partial ligation of the bile duct of juvenile rats could morphologically simulate the cystic or fusiform CC,which may contribute to investigating the pathogenesis of CC.

关键词： Choledochal cyst Animal model Partial ligation Cystic and fusiform dilation Juvenile rats

Hydrocarbon Generation Characteristics of Coal-measure Source Rocks and their Contribution to Natural Gas:A Case Study of Middle and Lower Jurassic Targets from the Southern Junggar Basin Margin

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Acta Geologica Sinica(English Edition) 2024年第5期98卷 1270-1284页

作者： YU Miao gao gang LIU Miao MA Wanyun TIAN Anqi FAN Keting GUO Liulinbo HE Dan ZHANG Youjin College of Geosciences China University of Petroleum National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum Research Institute of Experimental Testing Xinjiang Oilfield Company PetroChina Xinjiang Conglomerate Reservoir Laboratory Key Laboratory of Exploration and Development of Conglomerate Reservoirs

In order to study the hydrocarbon generation（HCGE） characteristics of coal-bearing basins, the coal-measure source rocks of the Middle Jurassic–Lower Jurassic（MLJ） of the piedmont thrust belt in the southern margin of the Junggar Basin in Northwest China are taken as research objects. More than 60 MLJ samples were collected from outcrops and wells. Total organic carbon（TOC）, rock pyrolysis（Rock–Eval）, organic petrological, vitrinite reflectance（%Ro）, and hydrous pyrolysis were performed to analyze the relevant samples. The pyrolysis gases and liquid products were measured, and then the chemical composition, as well as carbon isotopes of the gases, were analyzed. The results indicate that the MLJ source rocks have the capacity for large-scale gas generation. In addition, for coal-measure source rocks, the heavier the carbon isotope of kerogen(δ13Ckerogen), the lower the liquid hydrocarbon and hydrocarbon gas yield, and the easier it is to produce non-hydrocarbon gas. It is worth noting that when the δ13Ckerogenin organic matter（OM） is relatively heavier, the fractionation of its products may become weaker in the evolutionary process. The vital contribution of the MLJ source rock to natural gas resources in the study area was further confirmed by comparing it with the Jurassic source gas.

关键词： carbon isotope coal-bearing basins hydrous pyrolysis Jurassic source rock upstream natural resources/energy Xinjiang province

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带压开采工作面构造导水性微震监测研究

煤炭与化工 2024年第9期47卷 51-58页

作者：高刚河北煤炭科学研究院有限公司河北邢台054000 矿井水害探测与防控国家矿山安全监察局重点实验室河北邢台054000 河北省矿井微震重点实验室河北邢台054000

为研究带压开采工作面回采期间构造及隐伏构造是否会出现沟通深部含水层的现象,以赵固一矿为研究对象,采用矿井水害微震监测技术,对16091工作面回采阶段进行监测预警,捕捉到工作面过构造期间,近煤层破碎加剧但深部事件数量及所占比例未... 详细信息

为研究带压开采工作面回采期间构造及隐伏构造是否会出现沟通深部含水层的现象,以赵固一矿为研究对象,采用矿井水害微震监测技术,对16091工作面回采阶段进行监测预警,捕捉到工作面过构造期间,近煤层破碎加剧但深部事件数量及所占比例未增大,反映底板裂隙未出现向下进一步发育趋势。同时对断层参数与事件最大发育深度进行相关性分析,研究断层导水性影响因素。结果显示,该工作面回采未引发构造导水性增强,断层落差比倾角对断层沟通深部流场的影响程度更大。

关键词：微震监测带压开采水害防治构造导水性相关性分析

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正负样本差异特征双径向融合的自监督缺陷检测方法

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电子测量与仪器学报 2024年第5期38卷 201-209页

作者：高港魏利胜朱圣博安徽工程大学电气工程学院芜湖241000

针对纹理图像表面划痕、裂纹等缺陷不规则、随机分布,导致缺陷检测准确率低的问题,研究一种基于正负样本差异特征双径向融合的自监督缺陷检测方法。首先,采用Otsu阈值分割提取图像前景信息,并以DTD数据集中的纹理图像或数据增强后的正... 详细信息

针对纹理图像表面划痕、裂纹等缺陷不规则、随机分布,导致缺陷检测准确率低的问题,研究一种基于正负样本差异特征双径向融合的自监督缺陷检测方法。首先,采用Otsu阈值分割提取图像前景信息,并以DTD数据集中的纹理图像或数据增强后的正样本叠加Perlin噪声,对正样本图像进行缺陷模拟以合成负样本;然后,利用正负样本经编码器输出的中间特征,计算均方误差进行特征匹配,结合坐标注意力(coordinate attention, CA)和双径向路径聚合网络(path aggregation network, PANet)加强匹配特征的信息融合;最后,将融合特征与编码器输出的低层和高层特征一同输入解码器,优化调整Focal、L1和Dice损失函数权重,实现对缺陷掩码更精准地预测。实验显示,所提模型在MVTec AD数据集纹理类别上的平均图像级、像素级AUROC分别达到了0.995、0.968,相较于其他缺陷检测模型,分类和分割准确率均有提升,表明所提方法在纹理缺陷检测方面的有效性。

关键词：缺陷检测合成负样本 CA PANet 加权损失

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