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Effects of rotor structure on performance of small size axial flow fans

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Journal of Thermal Science 2011年第3期20卷 205-210页

作者： Pin Liu Yingzi jin yanping Wang Laboratory of Fluid Transmission and Application Zhejiang Sci-Tech University Hangzhou 310018 China

Small size axial flow fans are used as a cooling component for computers,electronic equipment and other electronic *** the increasing power of electrical equipment,the demand for lower noise and higher ventilation of cooling fan is also *** methods of improving ventilation by raising the fan's rotation speed causes a decrease in efficiency and an increase in *** this paper,different structures of fans were simulated,and as a result,the counter-rotating fan can achieve higher pressure,efficiency and facilitate ventilation in a smaller ***,some other conclusions are as follows:(1) Higher pressure rise can be obtained by a counter-rotating fan than by the two-stage rotor fan in the same axial ***,the counter-rotating fan has a broader work scope.(2) The main noise type of the counter-rotating fan is rotating noise;the small peak pulse caused by vortex noise mainly due to the eddy current produced by small eddies.(3) When the distance of counter-rotating fans is smaller than 2 times the chord,the greater distance the greater total pressure of the circum-averages and along the axial direction,the total pressure begin to decline until the distance is three times the chord,so there is an optimal distance between *** simulation results are of important significance to the quantitative analysis and optimization design of the counter-rotating fan.

关键词： axial flow fan counter-rotating eddy current noise

广东省青少年运动员反兴奋剂教育现状调查研究

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当代体育科技 2024年第18期14卷 156-160页

作者：贾章志宋永旺金艳平广东省黄村体育训练中心广东广州510663

采用问卷调查法、访谈法,对广东省青少年运动员反兴奋剂教育现状进行调查了解。结果表明:广东省青少年运动员对兴奋剂的认知较为清晰,反兴奋剂能力较好,但部分运动员对于使用兴奋剂仍然呈现出暧昧态度。因此,应加强反兴奋剂宣传、检查... 详细信息

采用问卷调查法、访谈法,对广东省青少年运动员反兴奋剂教育现状进行调查了解。结果表明:广东省青少年运动员对兴奋剂的认知较为清晰,反兴奋剂能力较好,但部分运动员对于使用兴奋剂仍然呈现出暧昧态度。因此,应加强反兴奋剂宣传、检查和惩处力度,提升反兴奋剂专职人员的专业性,加强辅助人员的反兴奋剂教育,规范其行为,明确其责任,树立良好榜样,引导青少年运动员建立正确的价值观。

关键词：反兴奋剂教育青少年运动员教育现状认知

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基于品管圈的早期预警性干预在老年认知功能障碍患者走失管理中的应用

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中国医药导报 2024年第16期21卷 79-82页

作者：吕莎金燕萍邓丽崔亮上海交通大学附属上海市第六人民医院老年病科上海200233

目的探讨基于品管圈的早期预警性干预在老年认知功能障碍患者走失管理中的应用效果。方法选取2022年9月至2023年6月上海交通大学附属上海市第六人民医院老年科收治的150例老年认知功能障碍患者为研究对象,按随机数字表法分为两组,每组7... 详细信息

目的探讨基于品管圈的早期预警性干预在老年认知功能障碍患者走失管理中的应用效果。方法选取2022年9月至2023年6月上海交通大学附属上海市第六人民医院老年科收治的150例老年认知功能障碍患者为研究对象,按随机数字表法分为两组,每组75例。对照组给予常规护理,试验组在对照组基础上给予基于品管圈的早期预警性干预。比较两组干预前后走失情况、认知能力和独立生活能力。结果试验组走失率低于对照组,走失时间短于对照组,差异有统计学意义(P<0.05)。干预后,两组蒙特利尔认知评估量表各维度评分、功能独立能力评价量表各维度评分及总分均高于干预前,且试验组高于对照组,差异有统计学意义(P<0.05)。结论基于品管圈的早期预警性干预可有效降低老年认知功能障碍患者的走失率,提高认知能力和独立生活能力。

关键词：品管圈早期预警性干预认知功能障碍走失认知能力独立生活能力

LncRNA CACNA1G-AS1 up-regulates FTH1 to inhibit ferroptosis and promote malignant phenotypes in ovarian cancer cells

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Oncology Research 2023年第2期31卷 169-179页

作者： yanping jin JIANPING QIU XIUFANG LU YAN MA GUOWEI LI Department of Obstetrics and Gynecology The Affiliated Suzhou Hospital of Nanjing Medical UniversitySuzhou Municipal Hospital NorthSuzhouChina Department of Neurosurgery The Second Affiliated Hospital of Soochow UniversitySuzhouChina

Previous study revealed that ferritin heavy chain-1(FTH1)could regulate ferritinophagy and affect intracellular Fe^(+)content in various tumors,while its N6-methyladenosine(m6A)RNA methylation was closely related the prognosis of ovarian cancer ***,little is known about the role of FTH1 m6A methylation in ovarian cancer(OC)and its possible action *** this study we constructed FTH1 m6A methylation regulatory pathway(LncRNA CACNA1G-AS1/IGF2BP1)according to related bioinformatics analysis and research,through clinical sample detections we found that these pathway regulatory factors were significantly up-regulated in ovarian cancer tissues,and their expression levels were closely related to the malignant phenotype of ovarian *** vitro cell experiments showed that LncRNA CACNA1G-AS1 could up-regulate FTH1 expression through IGF2BP1 axis,thus inhibited ferroptosis by regulating ferritinophagy,and finally promoted proliferation and migration in ovarian cancer ***-bearing mice studies showed that the knock-down of LncRNA CACNA1G-AS1 could inhibited the tumorigenesis of ovarian cancer cells in vivo *** results demonstrated that LncRNA CACNA1G-AS1 could promote the malignant phenotypes of ovarian cancer cells through FTH1-IGF2BP1 regulated ferroptosis.

关键词： Ovarian cancer m6A methylation Ferroptosis Mitophagy Malignant phenotype

E3GCAPS: Efficient EEG-Based Multi-Capsule Framework with Dynamic Attention for Cross-Subject Cognitive State Detection

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China Communications 2022年第2期19卷 73-89页

作者： Yue Zhao Guojun Dai Xin Fang Zhengxuan Wu Nianzhang Xia yanping jin Hong Zeng School of Computer Science and Technology Hangzhou Dianzi UniversityHangzhou 310018China Key Laboratory of Brain Machine Collaborative Intelligence of Zhejiang Province Hangzhou 310018China

Cognitive state detection using electroencephalogram(EEG)signals for various tasks has attracted significant research ***,it is difficult to further improve the performance of crosssubject cognitive state ***,most of the existing deep learning models will degrade significantly when limited training samples are given,and the feature hierarchical relationships are *** address the above challenges,we propose an efficient interpretation model based on multiple capsule networks for cross-subject EEG cognitive state detection,termed as Efficient EEG-based Multi-Capsule Framework(E3GCAPS).Specifically,we use a selfexpression module to capture the potential connections between samples,which is beneficial to alleviate the sensitivity of outliers that are caused by the individual differences of cross-subject *** addition,considering the strong correlation between cognitive states and brain function connection mode,the dynamic subcapsule-based spatial attention mechanism is introduced to explore the spatial relationship of multi-channel 1D EEG data,in which multichannel 1D data greatly improving the training efficiency while preserving the model *** effectiveness of the E3GCAPS is validated on the Fatigue-Awake EEG Dataset(FAAD)and the SJTU Emotion EEG Dataset(SEED).Experimental results show E3GCAPS can achieve remarkable results on the EEG-based cross-subject cognitive state detection under different tasks.

关键词： electroencephalography(EEG) capsule network cognitive state detection cross-subject

城市轨道交通运营线路保护区安全风险防控对策研究

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现代城市轨道交通 2024年第3期 113-117页

作者：李正中刘双邳慧然金艳萍天津市交通科学研究院天津300074

随着城市发展和地下空间开发利用进程的加快,城市轨道交通保护区内作业项目逐年增加,沿线保护区内安全问题日益严峻。为强化城市轨道交通运营安全管理,推进实现保护区安全风险联防联控,文章在分析国家政策与行业管理要求的基础上,以近... 详细信息

随着城市发展和地下空间开发利用进程的加快,城市轨道交通保护区内作业项目逐年增加,沿线保护区内安全问题日益严峻。为强化城市轨道交通运营安全管理,推进实现保护区安全风险联防联控,文章在分析国家政策与行业管理要求的基础上,以近年来城市轨道交通保护区安全事故为例,分析保护区存在的“违规施工”“异物侵限”“违规堆放”三大安全事故问题,揭示造成安全事故的主要原因,并提出健全保护区安全防控政策制度、推进保护区安全防控精准化、推动保护区安全防控信息化、建立突发事件应急处理机制4项对策建议,以此切实提高城市轨道交通安全运营保障水平。

关键词：城市轨道交通安全保护区安全防控对策研究

Factors Affecting Small Axial Cooling Fan Performance

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Journal of Thermal Science 2010年第2期19卷 126-131页

作者： Lihong Wang,Yingzi jin,Baoling Cui,Yuzhen jin,jin Lin,yanping Wang and Chuanyu Wu College of Mechanical Engineering & Automation,Zhejiang Sci-Tech University,Xiasha Education Zone,Hangzhou 310018,China College of Mechanical Engineering & Automation Zhejiang Sci-Tech University Xiasha Education Zone Hangzhou China

Many factors such as outer diameter, hub ratio, blade numbers, shape and stagger angle affect the performance of small cooling fans. A small cooling fan was simulated using CFD software for three blade stagger angles （30.5°, 37.5°, 44.5°）and obtained the internal flow field and the static characteristics. Research indicated that the stagger angle has an obvious effect on the static characteristics of a fan. For flow rates below 0.0104 mVs, total pressure is the greatest when the stagger angle is 37.5°; flow rates higher than 0.0104 m^3/s, the total pressure is greatest when the stagger angle is 44.5° For the same flow rates, the velocity at inlet of pressure surface increases with in- creasing stagger angle, but the change of velocity on the suction surface is very small. For one model, vortices and the speed of revolution surfaces decrease with tip clearance increasing. But for other three models, increasing the stagger angle, the vortex intensity and speed of revolution surfaces at same height tip clearance increases, simultaneously, the position of vortex offset from the top of the rotor blade to the suction surface.

关键词： Axial flow fan Stagger angle Revolution surface Vortex intensity

EFFECTS　OF　THERMAL　CYCLE　ON　MECHANICAL　PROPERTIES　OF　SiC　PARTICLES　REINFORCED　MoSi_2　COMPOSITE

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Acta Metallurgica Sinica(English Letters) 1996年第2期9卷 129-134页

作者： ZHENG Lingyi jin yanping LI Pengxing(The State Key Laboratory of Metal Matrix Composites Materials,Shanghai Jiao Tong University,Shanghai 200030,China) Shanghai Jiaotong Univ Shanghai China

MoSi_2 and 30 vol.% SiC_p/MoSi_2 composite have been fabricated by hot pressing (HP).A simulated thermal cycle experiment has been carried out at 1100℃ for 32 h to investigate the stability of the composite ***,mechanical tests,including measurement of flexural strength and fracture toughness at room temperature,have been conducted between materials before and after thermal *** is shown that both the strength and fracture toughness are enhanced by the addition of SiC particles. After thermal cycle,the strength of both materials increases and the toughness decreases by about 20%.The result that the composite system is not corroded intensely by thermal cycle shows that SiC particles are feasible reinforcement for MoSi2.

关键词： thermal cycle MoSi_2 SiC mechanical property interface

Effect of nitrogen fertilizer on distribution of starch granules in different regions of wheat endosperm

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The Crop Journal 2014年第1期2卷 46-54页

作者： Fei Xiong Xurun Yu Liang Zhou jing Zhang yanping jin Dongliang Li Zhong Wang College of Bioscience and Biotechnology Yangzhou University Department of Plant Science University of Connecticut

This study provided visual evidence of a nitrogen effect on starch granules(SGs) in wheat endosperm. Winter wheat(Titicum aestivum L.) cultivar Xumai 30 was cultured under no nitrogen(control) and 240 kg ha-1of nitrogen applied at the booting stage. The number, morphology, and size of Aand B-type SGs in subaleurone of dorsal endosperm(SDE), center of dorsal endosperm(CDE), modified aleurone(MA), subaleurone of ventral endosperm(SVE), and center of ventral endosperm(CVE) were observed under light and electron microscopes.(1) The distribution of SGs in SDE was similar to that in SVE, the distributions of SGs in CDE and CVE were similar, but the distribution of SGs in MA was different from those in the other four endosperm regions. The number of SGs in the five endosperm regions was in the order SDE > CDE > SVE > CVE > MA.(2) Nitrogen increased the number of Aand B-type SGs in SDE and SVE. Nitrogen also increased the number of B-type SGs but decreased the number of A-type SGs in CDE and CVE. Nitrogen decreased the numbers of A-type and B-type SGs in MA. The results suggest that increased N fertilizer application mainly increased the numbers of small SGs and decreased the numbers of large SGs, but that the results varied in different regions of the wheat endosperm.

关键词： Wheat endosperm Starch granules Nitrogen Distribution