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Numerical study of a guide-vane-augmented vertical darrieus tidal-currentturbine

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Journal of Hydrodynamics 2019年第3期31卷 522-530页

作者： Zhen Liu Zhi-meng wang Hong-da Shi Heng-liang Qu Shandong Provincial Key Laboratory of Ocean Engineering Ocean University of China Qingdao 266100 China Department of Ocean Engineering College of Engineering Ocean University of China Qingdao 266100 China Qingdao Municipal Key Laboratory of Ocean Renewable Energy Ocean University of China Qingdao 266100 China

It is reported that the augmented vertical axis turbine (VAT) has a better operating performance. A guide-vane type augmentation is proposed in this study, with a simpler outline and a better adaptability to various directions of the incident water flow, as compared to the duct-type diffuser. A 2?D numerical model based on the computational fluid dynamics software ANSYS-Fluent is established and validated by experimental data. It is found that the guide vanes could narrow the flow path together with the VAT rotor and increase the flow velocity around the blades. The fluctuation of the instantaneous torque output is significantly reduced by using the guide-vane stator. The numerical results indicate that a four blades setup is suitable for the stator and the chord length of the guide vane should be equal to that of the rotor blade. The gap between the stator and the rotor is suggested to be a quarter of the chord length of the rotor blades. The non-zero pitch angle of the guide vane is found to have negative effects on the torque and the power output. The averaged power and torque coefficients for three non-zero directional angles of the incident flow are approximately 30% lower than those for the zero-directional angle.

关键词： Tidal current energy vertical axis turbine augmented rotor guide vane numerical simulation

The Vertex Euclidean Properties of Graphs

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Acta Mathematica Sinica,English Series 2022年第7期38卷 1185-1202页

作者： Zhen Bin GAO meng wang Sin Min LEE Harris KWONG Shu Juan wang College of Mathematical Sciences Harbin Engineering UniversityHarbin 150001P.R.China 1786 Plan Tree Drive UplandCA 91784USA Dept.of Math.Sci. SUNY FredoniaFredoniaNY 14063USA

A simple graph G=(V,E)is said to be vertex Euclidean if there exists a bijection f from V to{1,2,...,|V|}such that f(u)+f(v)>f(w)for each C3 subgraph with vertex set{u,v,w},where f(u) 详细信息

A simple graph G=(V,E)is said to be vertex Euclidean if there exists a bijection f from V to{1,2,...,|V|}such that f(u)+f(v)>f(w)for each C3 subgraph with vertex set{u,v,w},where f(u)

关键词： Vertex Euclidean graph vertex Euclidean deficiency total graph of simple graph Zykov graph

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桑叶红茶二次发酵工艺优化

农产品加工 2024年第2期 47-51页

作者：王一迪孙闻王雅妮袁怀波合肥工业大学食品与生物工程学院安徽合肥230601 六安玫瑰红茶品有限公司安徽六安237299

为探索桑叶红茶的二次发酵工艺条件,在单因素试验基础上,通过检测桑叶红茶中脱氧野尻霉素(DNJ)、多酚等含量变化及滋味品质,确定发酵混合菌液配方及发酵温度和时间的优化区间,进行响应面回归分析。结果表明,改善桑叶茶综合品质的最优发... 详细信息

为探索桑叶红茶的二次发酵工艺条件,在单因素试验基础上,通过检测桑叶红茶中脱氧野尻霉素(DNJ)、多酚等含量变化及滋味品质,确定发酵混合菌液配方及发酵温度和时间的优化区间,进行响应面回归分析。结果表明,改善桑叶茶综合品质的最优发酵条件为棘孢曲霉、青霉、日本根霉的配比为2∶1∶1,发酵温度30℃,发酵时间4.6 h,接种量3.1×10^(7)CFU/100 g。在此条件下发酵桑叶茶能获得较高的滋味品质和营养价值。

关键词：桑叶红茶发酵菌种 DNJ

Dihydroxyflavonol reduces post-infarction left ventricular remodeling by preventing myocyte apoptosis in the non-infarcted zone in goats

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Chinese Medical Journal 2009年第1期122卷 61-67页

作者： wang Sheng FEI Ke XU ya-wei wang Liang-xu Chen yan-qin Department of Cardiothoracic SurgeryShanghai 10th People's Hospital Tongji University Shanghai 200072 China Department of Cardiology Shanghai 10th People's Hospital Tongji University Shanghai 200072 China

Background Myocyte apoptosis is considered to be the major causative factor of left ventricular （LV） remodeling following myocardial infarction （MI）. We previously reported that 3＇, 4＇-dihydroxyflavonol （DiOHF）, was able to suppress oxidative stress and preserve the expression of endothelial nitric oxide synthase during myocardial reperfusion injury, which may benefit the reduction of myocyte apoptosis. We therefore aimed to evaluate the potential actions of DiOHF against myocyte apoptosis and post-infarction LV remodeling in this study.Methods Following experimental MI, surgical instrumented goats were randomly assigned into vehicle and DiOHF （2 mg/kg; i.v., daily） groups to receive 4 weeks of reperfusion with corresponding treatments. LV pressure recordings and echocardiogram were performed at baseline, 2 and 4 weeks of reperfusion. Myocardial tissues were collected in the end to determine infarct size and apoptosis related assays.Results LV end-diastolic volume and diameter were significantly increased 4 weeks after MI in the vehicle group, accompanied by reduced posterior wall thickness, septal thickness and LV mass, whereas those changes were markedly prevented by DiOHF treatment. Similarly, significantly reduced infarct size was found in DiOHF group as compared to vehicle group, and DiOHF dramatically inhibited the increase in LV end-diastolic pressure and the reductions in ejection fraction, fraction shortening and dP/dtrnax. Moreover, DiOHF treatment significantly reduced the extent of myocyte apoptosis detected by TUNEL assay, enhanced the protein expression of caspase-3, Fas, Bax and cytochrome c in the non-infarcted myocardium in comparison to vehicle. Conclusions Daily DiOHF treatment during the reperfusion period after MI in the ovine hearts markedly reduced the magnitude of post-infarction LV remodeling through the inhibition of myocyte apoptosis in the remote non-infarcted myocardium.

关键词： flavonoids apoptosis myocardial infarction remodeling heart failure

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城轨交通新型道岔减振扣件的设计开发

山西建筑 2024年第7期50卷 135-137页

作者：张帆孟山王志强王金朝中国船舶集团公司第七二五研究所洛阳双瑞橡塑科技有限公司河南洛阳471023

随着城市轨道交通的快速发展及社会对环境噪声治理水平的提高,轨道交通线路减振降噪技术已逐步成熟。但对于道岔地段,由于岔区轨道结构的特殊性和复杂性,道岔减振治理效果及运营稳定性一直是各大城市的难点问题。通过对现有道岔减振措... 详细信息

随着城市轨道交通的快速发展及社会对环境噪声治理水平的提高,轨道交通线路减振降噪技术已逐步成熟。但对于道岔地段,由于岔区轨道结构的特殊性和复杂性,道岔减振治理效果及运营稳定性一直是各大城市的难点问题。通过对现有道岔减振措施的现状调研分析,分别从岔区行车的安全性、稳定性、易维护、低成本等方面综合考虑,设计开发了一种新型道岔减振扣件。新型道岔减振扣件经在线应用验证,安全性能满足线路行车要求,较普通道岔扣件可提高5 dB以上的减振效果,具有巨大的市场推广价值。

关键词：轨道交通减振降噪道岔减振扣件

Ruxolitinib treatment for bronchiolitis obliterans syndrome following hematopoietic stem cell transplant in a patient with primary hemophagocytic lymphohistiocytosis

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Chinese Medical Journal 2021年第13期134卷 1624-1625页

作者： Guang-Qiang meng Yi-Ni wang Jing-Shi wang Zhao wang Department of Hematology Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China

To the Editor:A 20-year-old man who developed hemophagocytic lymphohistiocytosis(HLH)was treated with methylprednisolone combined with etoposide(VP-16)for 24 *** month after treatment completion,HLH *** patient visited the Hematology Department of the Beijing Friendship Hospital and was diagnosed with primary HLH with PRF1 fusion gene mutation.

关键词： patient histiocytosis phagocytic

Masquelet技术治疗四肢长骨干慢性骨髓炎的研究进展

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中华创伤骨科杂志 2024年第7期26卷 636-639页

作者：郭艳辉孟宪勇何红英韩力黎庆王晓伟张建政河北北方学院研究生院张家口075000 解放军总医院第四医学中心骨科医学部显微外科北京100048 国家骨科与运动康复临床医学研究中心北京100048 河北北方学院附属第一医院张家口075000

Masquelet技术是一种治疗四肢长骨干慢性骨髓炎安全、有效的治疗措施,绝大部分骨髓炎可以最终获得控制,并实现节段骨缺损的修复和肢体功能的康复。随着临床应用的积累,影像学技术的发展,四肢长骨干慢性骨髓炎感染范围的界定、软组织缺... 详细信息

Masquelet技术是一种治疗四肢长骨干慢性骨髓炎安全、有效的治疗措施,绝大部分骨髓炎可以最终获得控制,并实现节段骨缺损的修复和肢体功能的康复。随着临床应用的积累,影像学技术的发展,四肢长骨干慢性骨髓炎感染范围的界定、软组织缺损修复的精准化术前设计、骨性结构稳定程度的评估、植骨材料等都取得了飞速的进步。本文从Masquelet技术的技术理论基础、操作关键、固定方式的选择等方面综述Masquelet技术治疗四肢长骨干慢性骨髓炎的进展,以期提高大家对此方面的认识。

关键词：骨髓炎骨干四肢慢性 Masquelet技术

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岩土工程深基坑施工中酸碱污染修复研究

环境科学与管理 2024年第6期49卷 89-93页

作者：王桃桃王璐蔡亚南刘玲华西安工商学院陕西西安710032 西安建筑科技大学华清学院陕西西安710043

为解决因酸碱污染导致的基坑土壤软化严重、易发生变形问题,提出一种岩土工程深基坑施工的酸碱污染修复研究。选用5~5.5 m深土壤作为实验样本,分别使用4%和10%两种浓度的HCL、NaOH溶液作为酸碱污染物,静止浸泡土壤30天。采用施工措施-... 详细信息

为解决因酸碱污染导致的基坑土壤软化严重、易发生变形问题,提出一种岩土工程深基坑施工的酸碱污染修复研究。选用5~5.5 m深土壤作为实验样本,分别使用4%和10%两种浓度的HCL、NaOH溶液作为酸碱污染物,静止浸泡土壤30天。采用施工措施-物理化学修复-生物修复的复合修复技术,通过土壤淋洗技术、固化-稳定技术处理,并添加20 gATCC菌种溶液,对酸碱污染土静止反应30天。实验对比酸碱污染修复前后的土壤微观结构、应力应变性质变化、变形模量,得出所提修复方法能够强化土壤硬度,提高基坑可承受围压程度。

关键词：岩土工程深基坑施工酸碱污染土酸碱污染修复土壤应力变形

一株水稻内生菠萝泛菌的分离及防病促生效果评价

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植物病理学报 2024年第4期54卷 808-818页

作者：袁加升贺赛雅张晋豪孟涵王博文魏兰芳姬广海云南农业大学省部共建云南生物资源保护与利用国家重点实验室昆明650201 云南农业大学农科基础实验教学中心昆明650201

由稻黄单胞菌稻生致病变种(Xanthomonas oryzae ***,Xoc)引起的水稻条斑病是水稻的主要细菌性病害之一,严重影响水稻的产量和质量。开发安全、高效的生防资源对该病害的防控至关重要。本研究利用点接法和牛津杯法,筛选获得了1个对Xoc拮... 详细信息

由稻黄单胞菌稻生致病变种(Xanthomonas oryzae ***,Xoc)引起的水稻条斑病是水稻的主要细菌性病害之一,严重影响水稻的产量和质量。开发安全、高效的生防资源对该病害的防控至关重要。本研究利用点接法和牛津杯法,筛选获得了1个对Xoc拮抗效果较好的水稻内生菌菌株XP-1,其发酵液抑菌圈直径为(56.1±0.1)mm。XP-1对烟草青枯病菌(Ralstonia solanacearum)、水稻白叶枯病菌(Xanthomonas oryzae ***)、烟草青枯病菌(Ralstonia solanacearum)、白菜软腐病菌(Pectobacterium carotovorum ***)、草莓角斑病菌(Xanthomonas fragariae)和甘蓝黑腐病菌(Xanthomonas campestris ***)等5种常见植物病原细菌均有较好的抑制作用。XP-1菌株具有产IAA、铁载体和解无机磷的能力,无固氮和解钾能力。室内浸种和盆栽试验结果表明:XP-1菌株的稀释发酵液能够促进水稻种子萌发及幼苗生长,对3个水稻品种(日本晴、IR24、滇禾优615)的病斑抑制率高达63.72%~94.47%。根据形态特征、生理生化特性和分子生物学鉴定结果,XP-1菌株为菠萝泛菌(Pantoea ananatis)。XP-1菌株抑菌谱较广,是一株有益的水稻内生菌,对水稻具有较好的防病促生效果。本研究为水稻细菌性条斑病生防资源的开发奠定了基础。

关键词：内生细菌菠萝泛菌鉴定水稻细菌性条斑病防病促生

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