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基于双级联架构的接触网螺栓缺陷检测

铁道标准设计 2024年

作者：卢杰魏霞张林鍹于立滨张剑锐涂美琪中国铁路乌鲁木齐局集团有限公司新疆大学电气工程学院清华大学国家计算机集成制造系统工程技术研究中心(CIMS)

高铁接触网作为列车牵引供电系统中的重要组成部分，保证其稳定运行具有重要意义。螺栓作为接触网的主要紧固件，其正常与否尤为重要，但螺栓在巡检采集图像中具有特征不明显、尺寸过小等问题，使得对于螺栓的缺陷检测研究更加困难。为... 详细信息

高铁接触网作为列车牵引供电系统中的重要组成部分，保证其稳定运行具有重要意义。螺栓作为接触网的主要紧固件，其正常与否尤为重要，但螺栓在巡检采集图像中具有特征不明显、尺寸过小等问题，使得对于螺栓的缺陷检测研究更加困难。为此，提出一种以深度学习为基准的接触网螺栓缺陷检测方法，该方法采用双级联架构的检测原则，将目标检测算法与语义分割算法相结合，实现对螺栓的定位与检测。首先，提出一种新算法YOLO-sac，通过构造反残差模块、引入可切换的空洞卷积以及对损失函数进行优化处理，分别实现对模型计算量的压缩、深层特征信息的提取、尺寸不一螺栓的识别优化；其次，通过语义分割算法U-Net对螺栓截取图片进行连通域划分，并求其各自的几何中心点位置坐标；最后，提出一种阈值法，实现对螺栓状态的检测。试验结果表明，本文提出的螺栓缺陷检测方法总精度达到93.5%，具有良好的实际工程价值。

关键词：高速铁路接触网螺栓缺陷检测 sac 反残差模块语义分割

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标准化良好行为企业试点工作报告(英文)

China Standardization 2013年第1期58卷 34-37页

作者： Standardization Administration of People’s Republic of China (sac) 国家标准化管理委员会

In order to strengthen enterprise standardization and improve standardization level, sac released Enterprise Standards System-Requirements and other three relevant national standards in September of 2003, based on which sac initiated the Pilot work of "Enterprise with Good Practice on Standardization" (EGPS) in March 2004. Later this pilot work has been spread

关键词：企业标准化工作企业标准体系国家标准组成部分 sac

第三届全国工业过程测量和控制标准化技术委员会及第四分技术委员会第二次全体会议纪要

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仪器仪表标准化与计量 2004年第3期 4-6页

作者： sac/TC124秘书处 sac/TC124秘书处

2004年5月14～17日在北京成功召开了第三届全国工业过程测量和控制标准化技术委员会及第四分技术委员会第二次全体会议。本次会议的内容重要且十分丰富,引起了工业自动化领域的专家、有关领导和广大企事业单位的广泛关注。会上有关领导... 详细信息

2004年5月14～17日在北京成功召开了第三届全国工业过程测量和控制标准化技术委员会及第四分技术委员会第二次全体会议。本次会议的内容重要且十分丰富,引起了工业自动化领域的专家、有关领导和广大企事业单位的广泛关注。会上有关领导就近期国家标准化工作改革方向和重点做了重要讲话,标委会主任委员做了关于该标委会下阶段工作重点及改革设想的报告,同时委员们还对三个重要标准进行了审查。相信本次会议的成功召开,对振兴我国工业自动化和仪表工业起到积极的促进作用。

关键词：标准化技术委员会 TC 标委会全体标委会秘书处标准制修订 sac 会议纪要会议录过程测量

Multi-UAV Trajectory Design and Power Control Based on Deep Reinforcement Learning

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Journal of Communications and Information Networks 2022年第2期7卷 192-201页

作者： Chiya Zhang Shiyuan Liang Chunlong He Kezhi Wang School of Electronic and Information Engineering Harbin Institute of TechnologyShenzhen 518055China National Mobile Communications Research Laboratory Southeast UniversityNanjing 211189.China School of Computer Sciences and Electrical Engineering.Northumbria University 5995 Newcastle upon TyneNewcastleUnited Kingdom of Great Britain and Northern IrelandUK NE18STUK

In this paper,multi-unmanned aerial vehicle(multi-UAV)and multi-user system are studied,where UAVs are served as aerial base stations(BS)for ground users in the same frequency band without knowing the locations and channel parameters for the users.We aim to maximize the total throughput for all the users and meet the fairness requirement by optimizing the UAVs’trajectories and transmission power in a centralized way.This problem is non-convex and very difficult to solve,as the locations of the user are unknown to the UAVs.We propose a deep reinforcement learning(DRL)-based solution,i.e.,soft actor-critic(sac)to address it via modeling the problem as a Markov decision process(MDP).We carefully design the reward function that combines sparse with non-sparse reward to achieve the balance between exploitation and exploration.The simulation results show that the proposed sac has a very good performance in terms of both training and testing.

关键词： multi-UAV and multi-user wireless system UAV powercontrol trajectorydesign throughputmaxi-mization sac

Real-Time Demand Response Management for Controlling Load Using Deep Reinforcement Learning

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Computers, Materials & Continua 2022年第12期73卷 5671-5686页

作者： Yongjiang Zhao Jae Hung Yoo Chang Gyoon Lim Department of Computer Engineering Chonnam National UniversityYeosu59626Korea

With the rapid economic growth and improved living standards,electricity has become an indispensable energy source in our lives.Therefore,the stability of the grid power supply and the conservation of electricity is critical.The following are some of the problems facing now:1)During the peak power consumption period,it will pose a threat to the power grid.Enhancing and improving the power distribution infrastructure requires high maintenance costs.2)The user’s electricity schedule is unreasonable due to personal behavior,which will cause a waste of electricity.Controlling load as a vital part of incentive demand response(DR)can achieve rapid response and improve demand-side resilience.Maintaining load by manually formulating rules,some devices are selective to be adjusted during peak power consumption.However,it is challenging to optimize methods based on manual rules.This paper uses SoftActor-Critic(sac)as a control algorithm to optimize the control strategy.The results show that through the coordination of the sac to control load in CityLearn,realizes the goal of reducing both the peak load demand and the operation costs on the premise of regulating voltage to the safe limit.

关键词： Demand response controlling load sac CityLearn

Multidisciplinary team for the diagnosis and treatment of 2cases of primary intestinal yolk sac tumor

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Cancer Biology & Medicine 2018年第4期15卷 461-467页

作者： Qiujuan Huang Changxu Liu Ruijun Tang Jie Li Wei Li Lei Zhu Yuhong Guo Lin Zhang Tongyuan Qu Lingyi Yang Lingmei Li Yalei Wang Baocun Sun Bin Meng Jie Yan Wengui Xu Huilai Zhang Dengfeng Cao Wenfeng Cao Department of Pathology Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin's Clinical Research Center for CancerTianjin Medical UniversityMinistry of EducationTianjin 300060China Department of Pathology Guilin TCM Hospital of ChinaGuilin 541002China Department of Pediatric Oncology Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin's Clinical Research Center for CancerTianjin 300060China Department of Lymphoma Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin's Clinical Research Center for CancerTianjin 300060China Department of Molecular Image and Nuclear Medicine Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin's Clinical Research Center for CancerTianjin 300060China Department of Pathology Tianjin Central Hospital of Gynecology ObstetricsTianjin 300110China The Lauren V Ackerman Laboratory of Surgical Pathology Division of Anatomic and Molecular PathologyDepartment of Pathology and ImmunologyWashington University School of MedicineSaint LouisMO 63110USA

Extragonadal primary yolk sac tumor of the intestinal tract origin is exceedingly rare. Through a multiple disciplinary team, the diagnosis and treatment of primary intestinal yolk sac tumor were further defined. We report 2 such cases with detailed histologic and immunohistochemical analysis. The two patients were a 7-year-old girl and a 29-year-old woman. Both of them preoperatively had an elevated serum alpha fetoprotein(AFP) level(≥ 1,210 ng/mL). The tumors are located in the intestine and imaging examination indicated the rectum as the primary site. Grossly the mass was grey-white and crisp texture. Microscopic examination featured reticular, microcystic, macrocystic, papillary, solid, and some glandular patterns. Immunohistochemically,tumor cells of both cases were positive for SALL4, AFP, pan-cytokeratin(AE1/AE3), and glypican-3. Simultaneously, a stain for EMA, OCT4, CD30, HCG, vimentin and CK20 were negative in all 2 neoplasms. The features of morphology,immunohistochemistry, laboratory examinations and imaging studies consist of the diagnosis of primary yolk sac tumor of the intestine.

关键词： Yolk sac tumor intestine extragonadal immunohistochemistry multidisciplinary team (MDT)

Why is oocyte aneuploidy increased with maternal aging?

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Journal of Genetics and Genomics 2020年第11期47卷 659-671页

作者： Jun-Yu Ma Sen Li Lei-Ning Chen Heide Schatten Xiang-Hong Ou Qing-Yuan Sun Fertility Preservation Lab Reproductive Medicine CenterGuangdong Second Provincial General HospitalGuangzhou510317China Department of Veterinary Pathobiology University of MissouriColumbiaMO 65211USA State Key Laboratory of Stem Cell and Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijing100101China

One of the main causes of pregnancy failure and fetus abortion is oocyte aneuploidy,which is increased with maternal aging.Numerous possible causes of oocyte aneuploidy in aged women have been proposed,including cross-over formation defect,cohesin loss,spindle deformation,spindle assembly checkpoint malfunction,microtubule-kinetochore attachment failure,kinetochore mis-orientation,mitochondria dysfunction-induced increases in reactive oxygen species,protein over-acetylation,and DNA damage.However,it still needs to be answered if these aneuploidization factors have inherent relations,and how to prevent chromosome aneuploidy in aged oocytes.Epidemiologically,oocyte aneuploidy has been found to be weakly associated with higher homocysteine concentrations,obesity,ionizing radiation and even seasonality.In this review,we summarize the research progress and present an integrated view of oocyte aneuploidization.

关键词： Aging Oocyte Aneuploidy Cohesin sac Spindle Mitochondria Meiosis DNA damage

Biochemical Characterization of Soluble Acid and Alkaline Invertases from Shoots of Etiolated Pea Seedlings

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Journal of Integrative Plant Biology 2010年第6期52卷 536-548页

作者： Donggiun Kim So Yun Park Youngjae Chung Jongbum Park Sukchan Lee Taek-Kyun Lee Department of Biological Science Silla University South Sea Environment Research Department Korea Ocean Research and Development Institute Department of Life Science and Biotechnology Shin Gyeong University Department of Genetic Engineering Sungkyunkwan University

Soluble invertase was purified from pea （Pisum sativum L.） by sequential procedures entailing ammonium sulfate precipitation, DEAE-Sepharose column, Con-A- and Green 19-Sepharose affinity columns, hydroxyapatite column, ultra-filtration, and Sephacryl 300 gel filtration. The purified soluble acid （sac） and alkaline （SALK） invertases had a pH optimum of 5.3 and 7.3, respectively. The temperature optimum of two invertases was 37 ℃. The effects of various concentrations of Tris-HCI, HgCI2, and CuSO4 on the activities of the two purified enzymes were examined. Tris-HCI and HgCI2 did not affect sac activity, whereas 10 mM Tris-HCI and 0.05 mM HgCI2 inhibited SALK activity by about 50%. sac and SALK were inhibited by 4.8 mM and 0.6 mM CuSO4 by 50%, respectively. The enzymes display typical hyperbolic saturation kinetics for sucrose hydrolysis. The Kms of sac and SALK were determined to be 1.8 and 38.6 mM, respectively. The molecular masses of sac shown by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and immunoblotting were 22 kDa and 45 kDa. The molecular mass of SALK was 30 kDa. Iso-electric points of the sac and SALK were estimated to be about pH 7.0 and pH 5.7, respectively.

关键词： sac Biochemical Characterization of Soluble Acid and Alkaline Invertases from Shoots of Etiolated Pea Seedlings

Enhancement of gut permeation of amoxicillin with Nigella sativa seed extract and its phytochemical screening

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Chinese Journal of Natural Medicines 2018年第2期16卷 125-130页

作者： Babar Ali Mohammad Ali Saima Amin Showkat R.Mir College of Pharmacy and Dentistry Buraydah Colleges Phytopharmaceuticals Research Lab Department of Pharmacognosy and Phytochemistry School of Pharmaceutical Education and Research (Formerly Faculty of Pharmacy) Jamia Hamdard

The seeds of Nigella sativa Linn.(Ranunculaceae), commonly known as Black cumin, are predominantly used as carminative, antispasmodic, and stimulant. The main objective of the present study was to evaluate the effect of N. sativa seed extract on the permeation of co-infused amoxicillin across the gut wall. The methanolic extract of N. sativa improved intestinal permeability of amoxicillin in in-vitro experiments in a dose-dependent manner. Two new glycosides, decanyl nigelloic acid diglucoside [n-decanyl-3-aldehydic-4-methoxy-5-hydroxy benzoate-5-β-D-glucofuranosyl(2→1)-β-D-glucopyranosyl-(2→1)-β-D-glucopyranoside]] and nigelabdienoyl triglucoside [homo-labd-5, 9(11)-dien-16-onyl-β-D-glucopyranosyl(2→1)-β-D-glucopyranosyl(2→1)-β-D-glucopyranoside], along with seven known fatty acid glycerides/esters, were isolated from the gut permeation enhancing extract. The structures of these new glycosides were elucidated by detailed spectroscopic analyses.

关键词： Nigella sativa Everted rat sac Homolabdane Amoxicillin Bioavailability