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Journal of Intelligent and Connected Vehicles 2022年第3期5卷 316-332页

作者： Haitao Ding Wei Li nan xu Jianwei Zhang State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchunChina

Purpose–This study aims to propose an enhanced eco-driving strategy based on reinforcement learning(RL)to alleviate the mileage anxiety of electric vehicles(EVs)in the connected ***/methodology/approach–In this paper,an enhanced eco-driving control strategy based on an advanced RL algorithm in hybrid action space(EEDC-HRL)is proposed for connected *** EEDC-HRL simultaneously controls longitudinal velocity and lateral lane-changing maneuvers to achieve more potential ***,this study redesigns an all-purpose and efficient-training reward function with the aim to achieve energy-saving on the premise of ensuring other driving ***–To illustrate the performance for the EEDC-HRL,the controlled EV was trained and tested in various traffic flow *** experimental results demonstrate that the proposed technique can effectively improve energy efficiency,without sacrificing travel efficiency,comfort,safety and lane-changing performance in different traffic flow ***/value–In light of the aforementioned discussion,the contributions of this paper are *** enhanced eco-driving strategy based an advanced RL algorithm in hybrid action space(EEDC-HRL)is proposed to jointly optimize longitudinal velocity and lateral lane-changing for connected EVs.A full-scale reward function consisting of multiple sub-rewards with a safety control constraint is redesigned to achieve eco-driving while ensuring other driving performance.

关键词： Ecological driving Electric vehicles Reinforcement learning in hybrid action space Velocity and lane-changing control Reward function

Effect of High Coal Injection on Low Silicon Ironmaking Process

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Journal of Iron and Steel Research International 2003年第4期10卷 1-3页

作者： JIN Yong long xu nan ping WU Shi ying Anshan University of Science and Technology

The effects of Fe 2O 3 addition in MgO CaO refractory on desulfurization of liquid iron were studied by SEM, EDA and chemical analysis. Fe 2O 3 of 1 % and 4 % were added to MgO CaO refractory as the lining of graphite crucible in which 150 g iron powder with sulfur of 0 15 % was charged. It is found that when the sample is heated at 1 600 ℃ for 40 min, 60 min and 90 min, the addition with Fe 2O 3 of 1 % improves desulfurization greatly. However, the desulfurization ratio of the refractory with Fe 2O 3 addition of 4 % is less than that with Fe 2O 3 addition of 1 %. For the soaking time of 90 min, the desulfurization ratio is less than those of 40 min and 60 min. These phenomena were explained by the contrary roles of O 2- and Fe 2+ formed by reaction between liquid iron and Fe 2O 3 on desulfurization.

关键词： desulfurization iron oxide MgO CaO refractory liquid iron

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Corporate Credit Ratings Based on Hierarchical Heterogeneous Graph Neural Networks

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Machine Intelligence Research 2024年第2期21卷 257-271页

作者： Bo-Jing Feng Xi Cheng Hao-nan xu Wen-Fang xue Center for Research on Intelligent Perception and Computing National Laboratory of Pattern RecognitionInstitute of AutomationChinese Academy of SciencesBeijing 100190China

order to help investors understand the credit status of target corporations and reduce investment risks,the corporate credit rating model has become an important evaluation tool in the financial *** models are based on statistical learning,machine learning and deep learning especially graph neural networks(GNNs).However,we found that only few models take the hierarchy,heterogeneity or unlabeled data into account in the actual corporate credit rating ***,we propose a novel framework named hierarchical heterogeneous graph neural networks(HHGNN),which can fully model the hierarchy of corporate features and the heterogeneity of relationships between *** addition,we design an adversarial learning block to make full use of the rich unlabeled samples in the financial *** experiments conducted on the public-listed corporate rating dataset prove that HHGNN achieves SOTA compared to the baseline methods.

关键词： Corporate credit rating hierarchical relation heterogeneous graph neural networks adversarial learning

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电力隧道工作井开挖对既有地铁结构影响分析

广东土木与建筑 2025年第1期32卷 105-107+112页

作者：张星伟张记峰徐南陈聪广东省建设工程质量安全检测总站有限公司广东省重工建筑设计院有限公司

为分析电力隧道工作井施工对临近地铁的影响，以某电力隧道工作井为例，通过数值模拟的方式，分析了工作井各开挖工况对地铁车站区间及地铁车站的变形影响。同时为提升评估的准确性，除了计算施工对变形影响外，仍对地铁结构的安全度、... 详细信息

为分析电力隧道工作井施工对临近地铁的影响，以某电力隧道工作井为例，通过数值模拟的方式，分析了工作井各开挖工况对地铁车站区间及地铁车站的变形影响。同时为提升评估的准确性，除了计算施工对变形影响外，仍对地铁结构的安全度、基坑开挖降水影响、隧道抗浮影响3个方面进行了专项分析。得到主要结论如下：(1)工作井施工过程中，引起地铁车站区间x方向最大水平位移0.311 mm、y方向最大水平位移0.269 mm、z方向最大竖向位移2.077 mm；引起车站x方向最大水平位移1.599 mm、y方向最大水平位移0.837 mm、z方向最大竖向位移2.422 mm，皆满足相关规范的要求，施工风险可控；(2)工作井施工过程对地铁车站区间暗挖隧道结构、地铁站主体结构的裂缝均控制在规范允许值内；(3)为控制地下水下降对紧邻结构的影响，在工作井施工的过程中，需将地下水位降深控制在2 m以内。

关键词：电力隧道数值模拟工作井开挖降水影响

A rare case of periampullary carcinoma with ectopic ending of Vater's ampulla

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World Journal of Gastroenterology 2009年第37期15卷 4729-4731页

作者： Shu-Guang Jin Zhe-Yu Chen Lu-nan Yan Yong Zeng Wei Huang nan xu Department of Hepato-Bilio-Pancreatic Surgery West China Hospital of Sichuan University Chengdu 610041 Sichuan Province China

A 71-year-old woman was referred to our department complaining of painless progressive jaundice for the last 3 too. Magnetic resonance imaging and magnetic resonance cholangiopancreatography （MRCP） showed the ectopic hepatopancreatic ampulla draining into the fourth part of the duodenum adjacent to the duodenojejunal flexure; the irregular morphology of the duodenojejunal flexure likely due to a soft tissue mass. Laparotomy confirmed the presence of the abnormal ampulla of Vater located at the fourth part of the duodenum and a soft tissue tumor about 6 cm × 5 cm×5 cm with a peduncle adjoining the ampulla. Resection of the tumor, including some peripheral tissue, and a Roux-Y loop anastomosis choledochojejunostomy were performed. Pathological examination indicated an intestinal villous adenoma accompanied by severe dysplasia and focal canceration. Periampullary carcinoma with ectopic ending of the Vater＇s ampulla into the fourth part of the duodenum is rather rare. The embryonic genetic background of this anomaly has not yet been fully explained. It is worth mentioning that MRCP is useful for demonstrating anomalies and anatomic variants of the biliary tract system and pancreatic duct.

关键词： Ectopia, Ampulla of Vater, Periampullary carcinoma Magnetic resonance cholangiopancreatography Treatment

Fecal DNA metabarcoding reveals the dietary composition of wintering Red-crowned Cranes(Grus japonensis)

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Avian Research 2023年第4期14卷 647-655页

作者： Hongyi Liu Wei xu nan xu Wenwen Zhang Haoming Jiang Yongqiang Zhao Changhu Lu Ying Zhu Peng xu The Co-Innovation Center for Sustainable Forestry in Southern China College of Life SciencesNanjing Forestry UniversityNanjing210037China Administration Station of Castanopsis Kawakamii Nature Reserve in Xinkou of Sanming Sanming365000China Research Center for Biodiversity Conservation and Biosafety State Environmental Protection Scientific Observation and Research Station for Ecological Environment of Wuyi MountainsBiodiversity Comprehensive Observation Station for Wuyi MountainsState Environmental Protection Key Laboratory on BiosafetyNanjing Institute of Environmental SciencesMinistry of Ecology and Environment of ChinaNanjing210042China Jiangsu Yancheng Wetland National Nature Reserve Yancheng224057China Institute of Qinghai Tibetan Plateau Southwest Minzu UniversityChengdu610041China Wetland College Yancheng Teachers UniversityYancheng224051China

Understanding the diet of threatened wildlife is vital for species-specific conservation and habitat management *** Red-crowned Crane(Grus japonensis)is a vulnerable bird distributed in Northeast *** dietary studies of this bird focused mainly on its plant food composition based on field observations and microhistological ***,a total of 45 fecal samples were collected in November,December and January(15 fecal samples each month)from wintering cranes,and then subjected to a high throughput sequencing meta-barcoding approach to determine the primary plant(rbcL)and animal(COI)food items in their diet.A total of 230 operational taxonomic units(OTUs)of plant foods and 371 OTUs of animal foods were *** main plant foods in the wintering period were Miscanthus,Zea,and Hordeum genera,which were similar to those in the breeding and the migration *** agricultural and natural plants were detected,indicating a relatively broad dietary niche for this crane ***,the main animal foods were representatives of Theridiidae,Megascolecidae,and Agelenidae,in sharp contrast to previous *** higher number of small terrestrial arthropods in animal foods might be due to the indirect intake of *** composition of both plant and animal foods in the diet showed the highest diversity in December,while it was homogeneous in *** plant of Zea genus became the main source of nutrition in late winter,as supplementary feeding was performed in the reserve,which could help Red-crowned Cranes to get through the cold *** results obtained in this work would contribute to the development of effective conservation strategies for the Red-crowned Crane.

关键词： Dietary composition Dietary niche Metabarcoding Molecular diet analysis Red-crowned Crane

Positive remediation on sedimentary P by combination of capping with calcium hydroxide and oxidation with perhydrol

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Journal of Environmental Sciences 2022年第2期34卷 170-179页

作者： Chutian xu Wei Yue Peirong Sun Shutong Chen Zhengying Wu nan xu Li Tang Guangzhou Sheng Dapeng Li School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China Shanghai Engineering Research Center of Landscape Water Environment Shanghai 200031China

The capping is called passive remediation because the sedimentary P was released and then immobilized by the capping ***,the release depends on the environmental ***,a hypothesis was proposed that the oxidant was used to accelerate sedimentary P release and the capping material was used to capture those released *** is positive remediation to reduce sedimentary P *** results show that soluble reactive phosphorus(SRP)concentration in the overlying water and pore water increased and then decreased gradually under the combination of sodium percarbonate(SPC)and Ca(OH)_(2),similar as that under the capping with single Ca(OH)_(2).The sedimentary P amount was reduced considerably and P concentration in the capping layer increased obviously after 60 days,compared with the capping with single Ca(OH)_(2).All these indicated that oxidation improved the sedimentary P release and the released P was captured and immobilized by the capping material of Ca(OH)_(2).However,the acceleration of sedimentary P release due to the oxidation is obviously different from the traditional mechanism that the oxic condition in the sediment is favor of the immobilization on sedimentary *** is attributed to the oxidizability of?OH from *** reduction of mobile-P and the increase of Ca-P under the combined use are *** is similar as traditional mechanism of oxic *** is sure that positive remediation reduced sedimentary P amount,resulting in the decrease of P release risk in a long time.

关键词： Remediation Eutrophication Internal P control Sediment

Roles of physical exercise in neurodegeneration:reversal of epigenetic clock

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Translational Neurodegeneration 2021年第3期10卷 385-399页

作者： Miao xu JiaYi Zhu Xian‑Dong Liu Ming‑Ying Luo nan‑Jie xu Department of Anatomy Histology and EmbryologyKunming Medi‑cal UniversityKunming 650500China Collaborative Innovation Center for Brain Science Department of Anatomy and PhysiologyShanghai Jiao Tong University School of MedicineShanghai 200025China Department of Neurology and Institute of Neurology Rui Jin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China Shanghai Key Laboratory of Reproductive Medicine Shanghai Jiao Tong University School of MedicineShanghai 200025China Key Laboratory of Cell Diferentiation and Apoptosis of Chinese Ministry of Education Shanghai Jiao Tong University School of MedicineShanghai 200025China Present Address:Department of Laboratory Medicine and Pathobiology University of TorontoTorontoONCanada

The epigenetic clock is defned by the DNA methylation(DNAm)level and has been extensively applied to distinguish biological age from chronological ***-related neurodegeneration is associated with epigenetic alteration,which determines the status of *** recent years,extensive research has shown that physical exercise(PE)can afect the DNAm level,implying a reversal of the epigenetic clock in *** also regulates brain plas‑ticity,neuroinfammation,and molecular signaling cascades associated with *** review summarizes the efects of PE on neurodegenerative diseases via both general and disease-specifc DNAm mechanisms,and discusses epigenetic modifcations that alleviate the pathological symptoms of these *** may lead to probing of the underpinnings of neurodegenerative disorders and provide valuable therapeutic references for cognitive and motor dysfunction.

关键词： Physical exercise DNA methylation Neural mechanism Neurodegeneration Motor defcits

基于循环神经网络的土地利用变化与驱动力分析——以山东日照为例

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山东国土资源 2025年第1期41卷 63-70页

作者：徐楠解军冯中萍李莉王靖伟日照市自然资源和规划局山东日照276800

为深入探讨日照市土地利用/覆盖变化的规律,本文利用循环神经网络模型对其2019—2023年期间土地利用/覆盖进行遥感影像分类,并基于分类结果研究分析了多种驱动因子与土地利用/覆盖变化之间的关系。结果表明,循环神经网络在处理遥感影像... 详细信息

为深入探讨日照市土地利用/覆盖变化的规律,本文利用循环神经网络模型对其2019—2023年期间土地利用/覆盖进行遥感影像分类,并基于分类结果研究分析了多种驱动因子与土地利用/覆盖变化之间的关系。结果表明,循环神经网络在处理遥感影像数据方面表现出色,5年的测试总体精度均超过92%,Kappa系数均超过0.84;并且在驱动力分析方面,城镇化率、生产总值和一般公共预算支出因素对日照市土地利用/覆盖变化有显著影响,改变土地资源的分配和使用。研究结果不仅揭示了日照市城市化和经济增长对土地利用/覆盖的深远影响,也为未来的土地管理和规划提供了有价值的参考。

关键词：土地利用/覆盖循环神经网络驱动力分析日照市

Short sellers' accusations against Chinese reverse mergers: Information analytics or guilt by association?

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China Journal of Accounting Research 2015年第2期8卷 111-131页

作者： Hongqi Liu nan xu Jianming Ye Southwestern University of Finance and Economics Baruch College City University of New York Xiamen University

This paper studies short sellers' trading strategies and their effects on the financial market by examining their accusations of fraud against Chinese reverse merger firms(CRMs) in the US. We find that short sellers rely on firms' fundamental information, especially relative financial indicators, to locate their "prey." Specifically, they compare a target firm's financial indicators(e.g., growth and receivables) with both the industry average and the firm's history. We find no evidence that short sellers accuse CRMs simply because of their reverse merger label. Additionally, we test the accuracy of short sellers' accusations in the long run and find that accused firms are more likely to delist and less likely to recover from price plunges. Our results also indicate that CRMs' high exposure to short sellers' accusations stem from adverse selection problems: firms with high litigation risk are more likely to choose reverse mergers to access the US capital market. Overall, our results support the view that short sellers are sophisticated investors and shed some light on their decision processes.

关键词： Chinese reverse mergers Fraud accusation Guilt by