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Development and application of high-precision multifunction astronomical plate digitizers in China

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Astronomical Techniques and Instruments 2024年第1期1卷 71-75页

作者： Meiting Yang Yong Yu Liangliang Wang zhengjun Shang Changshun Liu lixin zheng Zhendong Chen Jing Yang Dongmei Da Shan Dong Shiyin Shen zhenghong Tang Jianhai Zhao Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China University of Chinese Academy of Sciences Beijing 100049China

Before charge-coupled device detectors became widely employed in observational astronomy,for more than a hundred years,the main detection method was photography on astronomical glass ***,in order to preserve these historical data and maintain their usability,the International Astronomical Union has appealed to all countries for global digitization of astronomical plates by developing or adopting advanced digitization *** digitizers with high precision and high measuring speed represent key equipment for this *** Shanghai Astronomical Observatory and the Nishimura Co.,Ltd in Japan cooperated between 2013 and 2016 to develop the first Chinese high-precision astronomical plate digitizer,which was then used for complete digitization of all nighttime-observation astronomical plates in ***,in 2019–2021,the Shanghai Astronomical Observatory independently developed new models of plate digitizers that enabled countries such as Uzbekistan and Italy to digitize their astronomical ***,a new high-precision and multifunction digitizer was also used to digitize valuable microscope slides from the Shanghai Natural History Museum,providing a successful example of cross-domain application of high-precision digitization technology.

关键词： Astrometry-instrumentation Detectors-methods Data analysis-techniques Image processing

沿海核电厂输变电设备绝缘材料在台风产生盐害情况下绝缘降低发生闪络导致丧失厂外电有关现象的研究

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核电子学与探测技术 2024年第2期44卷 297-302页

作者：许友龙郑超颖张慧一郑丽馨李洋生态环境部核与辐射安全中心北京100082 苏州热工研究院有限公司苏州215004

2020年9月,韩国8台核电机组因台风“美莎克”(2020年9月3日)和“海神”(2020年9月7日)发生丧失厂外电源事件。发生此事件是由于核电厂与外部变电站及相关设施之间的输电线以及绝缘材料路出现问题。本文调查分析了丧失厂外电的原因和事... 详细信息

2020年9月,韩国8台核电机组因台风“美莎克”(2020年9月3日)和“海神”(2020年9月7日)发生丧失厂外电源事件。发生此事件是由于核电厂与外部变电站及相关设施之间的输电线以及绝缘材料路出现问题。本文调查分析了丧失厂外电的原因和事故序列,判断事件主要原因为输变电设备绝缘材料在台风产生盐害情况下绝缘降低发生闪络导致丧失厂外电。同时,梳理了国内外类似盐害现象导致绝缘降低的事件,研究盐害引起绝缘降低发生的闪络现象,得出研究结论并提出合理改进建议。

关键词：盐害闪络丧失厂外电台风气体绝缘母线

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基于深度学习的光伏发电功率预测模型

通信电源技术 2024年第20期41卷 26-28页

作者：郑立鑫杨楠国网北京通州供电公司北京100032

随着可再生能源的广泛应用,光伏发电在全球能源结构中占据重要地位。但光伏发电功率的预测由于天气状况和环境因素的复杂性而更具挑战性。通过对历史气象数据和光伏发电数据的深入分析与特征提取,文章提出一种基于深度学习的光伏发电功... 详细信息

随着可再生能源的广泛应用,光伏发电在全球能源结构中占据重要地位。但光伏发电功率的预测由于天气状况和环境因素的复杂性而更具挑战性。通过对历史气象数据和光伏发电数据的深入分析与特征提取,文章提出一种基于深度学习的光伏发电功率预测模型,并通过实验验证了其高效性。实验结果表明,该模型在光伏发电功率预测方面具有更高的准确性和稳定性,相较于传统方法在预测精度和可靠性上均表现出显著优势。文章的研究为光伏发电系统的优化运营与管理提供了重要的参考和借鉴。

关键词：光伏发电功率预测深度学习数据预处理特征提取

关于M5合金燃料包壳表面材料在堆内流致振动下脱落共性问题的研究

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核电子学与探测技术 2024年第4期44卷 721-729页

作者：许友龙吴彦农郑丽馨杨光生态环境部核与辐射安全中心北京100082 中广核核电运营有限公司深圳518000

M5锆合金包壳是由法国法马通公司设计研发的,目前广泛应用于核电厂AFA-3G等系列的燃料组件。本文分析了国内外核电厂使用M5合金燃料包壳表面材料在堆内流致振动下脱落共性问题的研究现状,包括燃料组件外观检查情况、氧化膜厚度测量情况... 详细信息

M5锆合金包壳是由法国法马通公司设计研发的,目前广泛应用于核电厂AFA-3G等系列的燃料组件。本文分析了国内外核电厂使用M5合金燃料包壳表面材料在堆内流致振动下脱落共性问题的研究现状,包括燃料组件外观检查情况、氧化膜厚度测量情况等,从而得出研究结论并提出合理建议。

关键词： M5锆铌合金氧化膜脱落含铁量

关于核电厂压力容器顶盖热套管磨损下沉导致控制棒卡涩问题的研究

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核科学与工程 2024年第2期44卷 333-340页

作者：许友龙毛欢刘莞郑丽馨李洋生态环境部核与辐射安全中心北京100082 苏州热工研究院有限公司苏州215004

热套管在国内被认为是控制棒驱动机构的部件之一,其吊挂在驱动机构密封壳底部,采用非固定式安装结构形式。欧美核工业界一般把热套管视为压力容器顶盖的内部构件之一,对控制棒驱动杆起导向作用,同时对顶盖贯穿件起保护作用。在冷却剂的... 详细信息

热套管在国内被认为是控制棒驱动机构的部件之一,其吊挂在驱动机构密封壳底部,采用非固定式安装结构形式。欧美核工业界一般把热套管视为压力容器顶盖的内部构件之一,对控制棒驱动杆起导向作用,同时对顶盖贯穿件起保护作用。在冷却剂的流动冲击下,热套管会发生振动并与密封壳底部互相磨损,致使热套管下沉甚至断裂,从而可能会导致控制棒卡涩。此类问题对于我国M310及其改进型机组具有较高的反馈价值。本文将分析国内外核电厂压力容器顶盖热套管磨损下沉导致控制棒卡涩问题的研究现状、事件原因和维修策略,并提出合理建议。

关键词：热套管控制棒卡棒磨损流致振动

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尹公洲单向控制段交通组织优化研究

中国海事 2024年第9期 46-50页

作者：郑立新车前程镇江海事局江苏镇江212002

为提升船长110 m及以上的船舶在长江尹公洲水域的通航效率,通过对受控船舶的数量和构成进行统计分析,结合当前的航行规定和国家标准,探索单向控制水域内受控船舶理论的安全会遇数量和长度。根据优化后的航道条件,对比分析数据,提出尹公... 详细信息

为提升船长110 m及以上的船舶在长江尹公洲水域的通航效率,通过对受控船舶的数量和构成进行统计分析,结合当前的航行规定和国家标准,探索单向控制水域内受控船舶理论的安全会遇数量和长度。根据优化后的航道条件,对比分析数据,提出尹公洲单向控制段交通组织的优化措施。

关键词：尹公洲航段交通组织优化

亚麻籽油磷虾油软胶囊对高血脂模型大鼠血脂的影响

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食品与发酵工业 2024年第5期50卷 54-58页

作者：翟磊陈建国田世民张朋朋蔡祥焜郑立新中国食品发酵工业研究院有限公司北京100015 中检科(北京)测试技术有限公司北京100123 中国检验检疫科学研究院综合检测中心北京100123

为研究亚麻籽油磷虾油软胶囊对高血脂的缓解功效,将50只雄性大鼠随机分为5组,高脂饲料造模7 d,经口给予大鼠不同剂量的亚麻籽油磷虾油软胶囊内容物30 d。通过检测各组大鼠血清中甘油三酯(triglyceride,TG)、总胆固醇(total cholesterol,... 详细信息

为研究亚麻籽油磷虾油软胶囊对高血脂的缓解功效,将50只雄性大鼠随机分为5组,高脂饲料造模7 d,经口给予大鼠不同剂量的亚麻籽油磷虾油软胶囊内容物30 d。通过检测各组大鼠血清中甘油三酯(triglyceride,TG)、总胆固醇(total cholesterol,TC)、低密度脂蛋白胆固醇(low density lipoprotein cholesterol,LDL-C)和高密度脂蛋白胆固醇(high density lipoprotein cholesterol,HDL-C)指标,评价亚麻籽油磷虾油软胶囊辅助降血脂的功效。结果显示:与空白对照组比较,模型组血清中TC、TG、LDL-C均极显著升高(P<0.01),说明模型成立;与模型对照组相比,低、高剂量组大鼠TC含量显著降低(P<0.05),分别降低了13.73%和14.79%;各剂量组大鼠TG、LDL-C含量均显著降低,TG分别降低了45.87%、55.44%和64.03%,LDL-C分别降低了40.54%、26.12%和46.85%,各剂量组大鼠体重及HDL-C无显著性差异,表明亚麻籽油磷虾油软胶囊具有辅助降血脂的功效。

关键词：亚麻籽油磷虾油软胶囊高血脂

Preparation methods,biological activities,and potential applications of marine algae oligosaccharides:a review

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Food Science and Human Wellness 2023年第2期12卷 359-370页

作者： lixin zheng Yang Liu Shijie Tang Wancong Zhang Kit-Leong Cheong Guangdong Provincial Key Laboratory of Marine Biotechnology Department of BiologyCollege of ScienceShantou UniversityShantou 515063China Department of Plastic Surgery and Burn Center The Second Affiliated HospitalShantou University Medical CollegeShantou 515063China

Marine algae are valuable sources of health-promoting molecules that have been consumed by Asians for *** aquatic flora,marine algae stand out in terms of high content of marine algae polysaccharides(MAP)such as carrageenan,alginate,fucoidan,laminaran,agarose,rhamnan,and *** hydrolyzed,MAP generate marine algae oligosaccharides(MAO),which have attracted interest in recent years due to their superior solubility compared with ***,MAO have been demonstrated numerous biological activities including antioxidant,antidiabetic,anti-inflammatory,antimicrobial,and prebiotic ***,this review summarizes the main chemical classes of MAO,their sources,and the main processes used for their production(i.e.,physical,chemical,and biological methods),coupled with a discussion of the advantages and disadvantages of these *** of the biological activities of MAO and their potential applications in food,nutraceutical,and pharmaceuticals would also be discussed and summarized.

关键词： Marine algae MAO Preparation methods Biological activities Potential applications

High rumen degradable starch diet induced blood bile acids profile changes and hepatic inflammatory response in dairy goats

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Animal Nutrition 2023年第3期14卷 121-129页

作者： lixin zheng Jing Shen Xiaoying Han Chunjia Jin Xiaodong Chen Junhu Yao College of Animal Science and Technology Northwest A&F UniversityYanglingChina Newhope Dairy Co. LtdChengduChina

The objective of this study was to reveal the effect of rumen degradable starch(RDS)on bile acid metabolism and liver transcription in dairy goats using metabolomics and *** Guanzhong dairy goats of a similar weight and production level(body weight=45.8±1.54 kg,milk yield=1.75±0.08 kg,and second parity)were randomly assigned to 3 treatment groups where they were fed a low RDS(LRDS,RDS=20.52%DM)diet,medium RDS(MRDS,RDS=22.15%DM)diet,or high RDS(HRDS,RDS=24.88%DM)diet,*** goats were fed with the experimental diets for *** the last day of the experiment,all goats were anesthetized,and peripheral blood and liver tissue samples were *** peripheral blood samples were used in metabolomic analysis and white blood cell(WBC)count,whereas the liver tissue samples were used in transcriptomic *** on the metabolomics results,the relative abundances of primary bile acids in the peripheral blood were significantly reduced in the group that was fed the HRDS diet(P<0.05).The WBC count was significantly increased in the HRDS group compared with that in the LRDS and MRDS groups(P<0.01),indicating that there was inflammation in the HRDS *** analysis showed that 4 genes related to bile acid secretion(genes:MDR1,RXRa,AE2,SULT2A1)were significantly downregulated in the HRDS *** addition,genes related to the immune response were upregulated in the HRDS group,suggesting the HRDS diet induced a hepatic inflammatory response mediated by lipopolysaccharides(LPS)(gene:LBP),activated the Toll-like receptor 4 binding(genes:S100A8,S100A9)and the NF-kappa B signaling pathway(genes:LOC106503980,LOC108638497,CD40,LOC102180880,LOC102170970,LOC102175177,LBP,LOC102168903,LOC102185461,LY96 and CXCL8),triggered inflammation and complement responses(genes:C1QB,C1QC,and CFD).The HRDS diet induced a hepatic inflammatory response may be mediated by activating the Toll-like receptor 4 binding and NF-kappa B signaling pathway afte

关键词： Rumen-degradable starch Bile acid metabolism Liver inflammation Dairy goat