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Experimental study on the bank erosion and interaction with near-bank bed evolution due to fluvial hydraulic force

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International Journal of Sediment Research 2015年第1期30卷 81-89页

作者： Ming-hui YU Hong-yan WEI song-bai WU State Key Laboratory of Water Resources and Hydropower Engineering Sciences Wuhan University

Bank erosion is a typical process of lateral channel migration,which is accompanied by vertical bed *** a main sediment source,the failed bank soil may directly cause the increase of sediment concentration and considerable channel evolution in a short *** paper presents an experimental study on non-cohesive and cohesive homogenous bank failure processes,influence of the failed bank soil on bank re-collapse,as well as the interaction between bank failure and near-bank bed evolution due to fluvial hydraulic force.A series of experiments were carried out in a 180° bend rectangular *** results reveal the iteration cycle between bank erosion and bed deformation:undercutting of the riverbank,slip failure of the submerged zone of the bank,as well as cantilever failure of the overhang,failed bank soil staying at bank toe temporarily or hydraulic transportation,exchange between the failed bank soil and bed material,bed material load being re-transported either as bed load or as suspended load,and bed *** as bank failure,the mixing of failed bank soil and bed material is more severe near the curved flow ***,non-cohesive bank failure tends to occur near the water surface while cohesive bank failure near the bank *** non-cohesive dense(sandy) soil,the bank erosion amount and residual amount of failed bank soil on the bed increase with the near-bank velocity or bed *** for cohesive soil,only bank erosion amount follows the above *** results are expected to provide theoretical basis for river management and flood prevention.

关键词： Bank erosion Near-bank bed evolution Hydraulic transport Interaction Flume experiment

Dust-Acoustic Solitons in Dusty Plasma with Two-Temperature Ions

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Chinese Physics Letters 2000年第11期17卷 815-817页

作者： XIE bai-song HE Kai-Fen HUANG Zu-Qia Key Laboratory in University for Beam Technology and Materials Modification Beijing Normal UniversityBeijing 100875 Institute of Low Energy Nuclear Physics Beijing Normal UniversityBeijing 100875 Beijing Radiation Center Beijing 100875

Dust-acoustic solitons in dusty plasmas with two-temperature isothermal ions are investigated by considering an effect of self-consistent dust-charge *** the reductive perturbation technique we derived dust-acoustic *** is found that both rarefactive and compressive solitons exist and the approximate similarity law which holds in dust-charge-fluctuation plasma system with one-temperature ion does not survive in the present studied dusty plasma with two-temperature isothermal ions.

关键词： solitons holds perturbation

Research progress and prospects of nucleic acid isothermal amplification technology

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BIOCELL 2023年第11期47卷 2385-2395页

作者： SHUHUI WU PING XU XIANGBIN XU song-bai LIU Suzhou Key Laboratory of Medical Biotechnology Suzhou Vocational Health CollegeSuzhou215009China School of Food Science and Engineering Hainan UniversityHaikou570228China The Affiliated Infectious Diseases Hospital Suzhou Medical College of Soochow UniversitySuzhou215100China

Nucleic acid(DNA and RNA)detection and quantification methods play vital roles in molecular *** the development of molecular biology,isothermal amplification of DNA/RNA,as a new molecular biology technology,can be amplified under isothermal condition,it has the advantages of high sensitivity,high specificity,and high efficiency,and has been applied in various fields of biotechnology,including disease diagnosis,pathogen detection,food hygiene and safety detection and so *** paper introduces the progress of isothermal amplification technology,including rolling circle amplification(RCA),nucleic acid sequence-dependent amplification(NASBA),strand displacement amplification(SDA),loop-mediated isothermal amplification(LAMP),helicase-dependent amplification(HDA),recombinase polymerase amplification(RPA),cross-priming amplification(CPA),and its principle,advantages and disadvantages,and application development are briefly summarized.

关键词： Isothermal amplification Rolling circle amplification Nucleic acid sequence-based amplification Strand displacement amplification Loop-mediated isothermal amplification Helicase-dependent amplification Recombinase polymerase amplification Cross-primer amplification

Modified Dust-Acoustic Solitons by Adiabatic Variation of Dust Charges

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Chinese Physics Letters 1998年第12期15卷 892-894页

作者： XIE bai-song HE Kai-fen HUANG Zu-qia Institute of Low Energy Nuclear Physics Beijing Normal UniversityBeijing 100875

By the multi-scale expansion method an effect of adiabatic variation of dust charges on dust-acoustic soliton is *** is found that the amplitude of the soliton decreases while its width narrows in comparison with the ... 详细信息

关键词： soliton charges narrow

Senescent remodeling of the immune system and its contribution to the predisposition of the elderly to infections

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Chinese Medical Journal 2012年第18期125卷 3325-3331页

作者： DEWAN Sheilesh Kumar ZHENG song-bai XIA Shi-jin BILL Kalionis Department of Geriatric Medicine Huadong Hospital FudanUniversity China Shanghai 200040 Shanghai Institute of Huadong Hospital FudanUniversity China Shanghai 200040 Department of Perinatal Medicine Pregnancy Research CentreUniversity of Melbourne Department of Obstetrics and Gynaecology Royal Women's Hospital Parkville VictoriaAustralia

Objective To review the senescent remodeling of the immune system with aging and its relevance to the increased susceptibility of the elderly to infectious diseases, along with an outlook on emerging immunological biomarkers. Data sources The data selected were from PubMed with relevant published articles in English or French from 1995 to the present. Searches were made using the terms immunosenescence and aging paired with the following： innate immunity, T-celr, B-cell, adaptive immunity and biomarkers. Articles were reviewed for additional citations and some information was gathered from web searches. Study selection Articles on aging of both the innate and adaptive immunity were reviewed, with special attention to the remodeling effect on the ability of the immune system to fight infectious diseases. Articles related to biomarkers of immunosenescence were selected with the goal of identifying immunological biomarkers predisposing the elderly to infections. Results Innate immunity is generally thought to be relatively well preserved or enhanced during aging compared with adaptive immunity which manifests more profound alterations. However, evidence, particularly in the last decade, reveals that both limbs of the immune system undergo profound remodeling with aging. Reported data on adaptive immunity is consistent and changes are well established but conflicting results about innate immunity were reported between in vivo and in vitro studies, as well as between murine and human studies. Epidemiological data suggests increased predisposition of the elderly to infections, but no compelling scientific evidence has directly linked senescent immune remodeling to this increased susceptibility. Recently, growing interest in identifying immunological biomarkers and defining immune risk phenotypes/profiles （IRP） has been expressed. Identification of biomarkers is in its early days and few potential biomarkers have been identified, with the Swedish having defined one IRP bas

关键词： senescent immune remodeling elderly, immunosenescence, infections, innate immunity, adaptive immunity,immune risk profile, immunological biomarker

基于改进XGBoost算法的XLPE电缆接头故障自动化诊断与测量研究

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自动化与仪表 2024年第7期39卷 84-86,95页

作者：周强顾汉富柏嵩张翔国家电投集团江苏新能源有限公司盐城224000

该文研究基于改进XGBoost算法的XLPE电缆接头故障自动化诊断方法。以35 kV XLPE电缆接头为例,设计局放模拟实验,测量4种绝缘故障局放信号,生成二维局放图谱。从中提取描述投影形状和正负半周轮廓差异的故障特征,构建一维向量输入XGBoos... 详细信息

该文研究基于改进XGBoost算法的XLPE电缆接头故障自动化诊断方法。以35 kV XLPE电缆接头为例,设计局放模拟实验,测量4种绝缘故障局放信号,生成二维局放图谱。从中提取描述投影形状和正负半周轮廓差异的故障特征,构建一维向量输入XGBoost模型,实现故障自动化诊断。应用哈里斯鹰算法优化模型参数,提高诊断分类性能。实验结果表明,该方法能有效测量不同故障类型的局放图谱,并以其特征实现高精度的XLPE电缆接头故障自动化诊断,确保了电缆长期稳定运行,更好地保障了电力安全。

关键词：改进XGBoost算法 XLPE电缆接头故障自动化诊断绝缘故障哈里斯鹰算法

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肾盂积水密度与输尿管镜碎石术后患者发生严重感染并发症的关系

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泌尿外科杂志(电子版) 2024年第3期16卷 12-16页

作者：张凯淇李志远白松费翔中国医科大学附属盛京医院第三泌尿外科

目的探讨肾盂积水密度与输尿管镜碎石术(ureteroscopic lithotripsy,URS)后患者发生严重感染并发症的风险关系。方法回顾性分析2021年6月至2024年1月在中国医科大学附属盛京医院行URS的292例患者的临床资料,采用非增强计算机断层扫描(... 详细信息

目的探讨肾盂积水密度与输尿管镜碎石术(ureteroscopic lithotripsy,URS)后患者发生严重感染并发症的风险关系。方法回顾性分析2021年6月至2024年1月在中国医科大学附属盛京医院行URS的292例患者的临床资料,采用非增强计算机断层扫描(non-contrast CT,NCCT)测量肾盂积水密度。严重感染并发症包括全身炎症反应综合征(systemic inflammatory response syndrome,SIRS)、败血症及感染性休克。采用二元逻辑回归模型评估OR值和95%CI。结果 URS术后感染组肾盂积水密度、女性例数、体质量指数高于未感染组,结石密度、积水程度低于未感染组,差异有统计学意义(P<0.05)。在调整混杂变量后,比较肾盂积水密度最低四分位数患者,最高四分位数患者的OR(95%CI)为47.67 (5.55,99.59)。输尿管结石患者肾盂积水密度与URS后严重感染并发症的风险呈正向线性相关(P<0.01)。肾盂积水密度的受试者工作特征曲线下面积和95%CI为0.869 3 (0.803 3,0.935 3)(P<0.01)。截断值为12.0 HU,灵敏度为79.62%,特异度为81.25%。结论在输尿管结石患者中,肾盂积水密度与URS后发生严重感染的风险呈正相关,这有助于临床制定输尿管镜碎石围手术期治疗决策。

关键词：肾盂积水 CT值输尿管镜碎石术尿路感染

单体种类对光固化增材制造5052铝合金的影响

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矿冶工程 2024年第2期44卷 145-152页

作者：刘明信乔聪卓彭超群王日初柏松王小锋中南大学材料科学与工程学院湖南长沙410083

针对光固化增材制造5052铝合金时存在的浆料不稳定、烧结体密度偏低和碳残留量较高等问题,研究了树脂单体种类对铝合金光固化增材制造的影响。结果表明,单体种类对光固化增材制造5052铝合金的成型工艺和烧结体性能具有重要影响。采用单... 详细信息

针对光固化增材制造5052铝合金时存在的浆料不稳定、烧结体密度偏低和碳残留量较高等问题,研究了树脂单体种类对铝合金光固化增材制造的影响。结果表明,单体种类对光固化增材制造5052铝合金的成型工艺和烧结体性能具有重要影响。采用单体TMPTA或PEG400DA的铝浆黏度大于30 Pa·s,沉降时间大于120 h,成型的铝合金坯体结构完整但表面孔洞较多;采用单体PEG200DA或HDDA的铝浆黏度低于30 Pa·s,但沉降时间小于16 h,成型的铝合金坯体表面无孔洞但结构易残缺;采用单体PS-PCL的铝浆黏度低于30 Pa·s且稳定不易沉降,坯体表面无孔洞且结构完整。采用优选单体PS-PCL制备固含量55%铝浆,打印成型并烧结后,其相对密度大于95%,碳残留量相对较低(0.259 17%),断口烧结颈明显,硬度相对较高(29.94HV)。

关键词： 5052铝合金增材制造光固化 3D打印单体铝浆黏度相对密度

长链非编码RNA(lncRNA)-MSTRG.22610.1对BHV-1体外复制影响的研究

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中国预防兽医学报 2024年第3期46卷 278-284,299页

作者：姜坤生王禹淳马金柱于立权宋佰芬黑龙江八一农垦大学生命科学技术学院黑龙江大庆163319 中国农业大学动物医学院北京100193

本研究室前期将牛疱疹病毒Ⅰ型(BHV-1)感染牛肾细胞(MDBK),通过转录组测序筛选到了转录显著差异的长链非编码RNA-MSTRG.22610.1(lncRNA-MSTRG.22610.1),为了探究其在MDBK中对BHV-1复制的影响,本研究采用CCK-8法筛选对细胞无毒性的聚凝... 详细信息

本研究室前期将牛疱疹病毒Ⅰ型(BHV-1)感染牛肾细胞(MDBK),通过转录组测序筛选到了转录显著差异的长链非编码RNA-MSTRG.22610.1(lncRNA-MSTRG.22610.1),为了探究其在MDBK中对BHV-1复制的影响,本研究采用CCK-8法筛选对细胞无毒性的聚凝胺、嘌呤霉素的最佳浓度;将重组慢病毒r ZHLV-U6-Zs Green1-puro-MSTRG.22610.1和r ZHLV-U6-Zs Green1-puro(对照慢病毒)按照不同的MOI分别感染MDBK细胞,48 h后观察荧光,采用Image J软件检测并计算各慢病毒感染细胞后出现绿色荧光细胞的比率,出现绿色荧光细胞的比率达80%的细胞对应的MOI即为最佳MOI。筛选结果显示聚凝胺与嘌呤霉素的最佳工作浓度分别为5μg/mL及3μg/m L,慢病毒感染的最适MOI为80。将r ZHLV-U6-Zs Green1-puro-MSTRG.22610.1和对照慢病毒分别以最佳条件感染MDBK细胞并培养及传代,传至8~10代,每代均观察细胞形态及细胞中的绿色荧光,并通过RT-q PCR检测第6、8、10代细胞中lncRNA-MSTRG.22610.1的转录水平,以构建并鉴定稳定表达lncRNA-MSTRG.22610.1的MDBK细胞系1T及对照细胞系1NC。结果显示,每代1T细胞、1NC细胞的状态均良好并均与阴性对照MDBK细胞的形态无差别,且每代1T及1NC细胞均出现绿色荧光。RT-q PCR结果显示,与1NC及阴性对照细胞相比,1T细胞系中lncRNA-MSTRG.22610.1的转录水平极显著升高(P<0.0001)。表明获得了高水平表达lncRNA-MSTRG.22610.1却不影响细胞增殖的细胞系,且该细胞系的遗传稳定性较强。将BHV-110倍倍比稀释后分别感染传至10代的1T与1NC细胞,24 h后采用Reed-Muench法计算各组细胞中的病毒滴度。结果显示,1T、1NC及MB细胞(感染BHV-1的MDBK细胞)的病毒滴度分别为105.15 TCID50/0.1 m L、104.41TCID50/0.1 m L及104.58 TCID50/0.1 m L。与MB和1NC细胞相比,1T细胞中的病毒滴度显著升高(P<0.05),表明lnc RNA-MSTRG.22610.1表达后促进BHV-1在MDBK细胞中的复制。本研究为进一步探究lncRNA-MSTRG.22610.1促进病毒复制的分子机制及深入了解BHV-1感染的分子机制提供参考依据。

关键词：长链非编码RNA 牛肾细胞牛疱疹病毒I型慢病毒过表达病毒增殖