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ADCP水池校准方法研究

计量学报 2024年第7期45卷 1055-1063页

作者：罗辉焦君圣陶然史占红方卫华刘建遥中国计量大学原位计量教育部重点实验室浙江杭州310018 南京水利水文自动化研究所江苏南京210012 水利部水文仪器及岩土工程仪器质量监督检验测试中心江苏南京210029

提出一种在实验室消声水池环境下对声学多普勒流速剖面仪(ADCP)进行校准的方法。通过发射仿真回波信号,利用频率和延时时间实现量值溯源,进而实现对流速和深度的校准。研制了一套ADCP水池校准系统,以2波束614.4 kHz ADCP为校准对象,设... 详细信息

提出一种在实验室消声水池环境下对声学多普勒流速剖面仪(ADCP)进行校准的方法。通过发射仿真回波信号,利用频率和延时时间实现量值溯源,进而实现对流速和深度的校准。研制了一套ADCP水池校准系统,以2波束614.4 kHz ADCP为校准对象,设计不同的流速分布实现对水层流速校准,探究底跟踪信号非限幅下的校准,设计多波束和单波束对比实验。对底跟踪速度进行不确定度评定,结果表明,在0~2.5 m/s速度下,不确定度最大为2.30 mm/s,验证了该校准方法的可行性。

关键词：水声计量声学多普勒流速剖面仪水池校准水声回波建模不确定度分析流速校准

Microstructure evolution and precipitation behavior of Al-Mg-Si alloy during initial aging

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China Foundry 2023年第1期20卷 57-62页

作者： Ya-ya Zheng Bing-hui luo Wei Xie Wang Li Department of Materials Engineering Hunan University of HumanitiesScience and TechnologyLoudi 417000HunanChina College of Materials Science and Engineering Central South UniversityChangsha 410083China Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle Changsha University of Science&TechnologyChangsha 410114China

The microstructure evolution and precipitation behavior of Al-Mg-Si alloy during initial aging were studied using hardness testing, conductivity testing, differential scanning calorimetry(DSC), and high resolution transmission electron microscopy(HRTEM). The results show that the precipitation sequence of the Al-Mg-Si alloy during initial aging can be represented as: supersaturated solid solution → spherical Mg/Si clusters → needle-like Guinier Preston(GP) zone → β″. Clusters are completely coherent with the Al matrix. The GP zone with relatively complete independent lattice parameters that differ slightly from the Al matrix parameters, is oriented along the direction of Aland lying on {111}Alplane. The strength of the Al-Mg-Si alloy is greatly enhanced by the threedimensional strain field that exists between the β″ phase and the two {200}Alplanes. After aging at 170 ℃ for 6 h, the hardness reaches the peak of 127 HV and remains for a long time. At this stage, the electrical conductivity keeps relatively stable due to the formation of coherent precipitates(Mg/Si clusters/GP zones) and the reduction in solute atom concentration in the Al matrix. The severe coarsening and decreased number density of the β″ phase during the over-aging stage result in a significant decrease in the hardness.

关键词： Al-Mg-Si alloy precipitation behavior strengthening mechanism strain field β″

Predictive and prognostic biomarkers with therapeutic targets in advanced colorectal cancer

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World Journal of Gastroenterology 2014年第14期20卷 3858-3874页

作者： hui-Yan luo Rui-Hua Xu Department of Medical Oncology Sun Yat-sen University Cancer Center State Key Laboratory of Oncology in South China Collaborative Innovation Center for Cancer Medicine

Colorectal cancer(CRC)is one of the most common human malignant diseases and the second leading cause of cancer-related deaths *** treatment of advanced CRC has improved significantly in recent *** the emergence of two targeted antibodies,cetuximab(Erbitux),an anti-epidermal growth factor receptor monoclonal antibody and bevacizumab(Avastin),a vascular endothelial growth factor monoclonal antibody,the treatment of metastatic CRC has entered the era of personalized *** and prognostic biomarkers have,and will continue to,facilitate the selection of suitable patients and the personalization of treatment for metastatic CRC(mCRC).In this review,we will focus primarily on the important progresses made in the personalized treatment of mCRC and discuss the potentially novel predictive and prognostic biomarkers for improved selection of patients for anti-cancer treatment in the future.

关键词： Biomarker Target therapy Predictive Prognostic Advanced colorectal cancer

三级综合医院护士健康促进生活方式现状及潜在剖面分析

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中华护理杂志 2024年第15期59卷 1869-1876页

作者：李卫娟赵越蒋敬刘梦媛罗慧冯心语李映兰中南大学湘雅护理学院长沙市410000 新疆医科大学护理学院中南大学湘雅医院护理指导委员会

目的了解三级综合医院护士健康促进生活方式(health-promoting lifestyle,HPL)的现状,探究其类别特征,分析不同类别下的影响因素。方法于2023年3月—4月,采用多阶段抽样法,选取湖南省10所三级综合医院的1326名护士作为调查对象。使用一... 详细信息

目的了解三级综合医院护士健康促进生活方式(health-promoting lifestyle,HPL)的现状,探究其类别特征,分析不同类别下的影响因素。方法于2023年3月—4月,采用多阶段抽样法,选取湖南省10所三级综合医院的1326名护士作为调查对象。使用一般资料调查表、HPL量表、健康行为自我效能评定量表和护理工作环境量表进行调查,对护士HPL进行潜在剖面分析,并通过单因素分析和Logistic回归分析探究不同剖面的影响因素。结果最终纳入1220名护士,HPL量表得分为(62.61±18.67)分。三级综合医院护士HPL可分为生存型(25.41%)、活力型(21.97%)和常态型(52.62%)3个剖面。Logistic回归分析结果显示,压力应对方式、每日非职业性体力活动情况、自觉健康状况、健康行为自我效能及护理工作环境是三级综合医院护士HPL的影响因素(P<0.05)。结论三级综合医院护士HPL存在明显的异质性,建议护理管理者依据不同类别护士的特征进行个体化干预,可将健康行为自我效能作为干预的核心,以提升其HPL水平。

关键词：护士健康促进生活方式潜在剖面分析护理管理研究

Chinese herbal medicine for subacute thyroiditis:a systematic review of randomized controlled trials

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Journal of Traditional Chinese Medicine 2014年第3期34卷 243-253页

作者： hui luo Meng Lü Xiaohua Pei Zhongyuan Xia Institute for Tibetan Medicine ChinaTibetology ResearchCenter Sino-Japanese Friendship Clinical School of Medicine Beijing University of Chinese Medicine Department of Surgery Third Affiliated Hospital Beijing University of Chinese Medicine Department of Surgery of Traditional Chinese Medicine China-Japan Friendship Hospital

OBJECTIVE:To evaluate the effectiveness and safety of Chinese herbal medicine(CHM) in the ***: Randomized controlled trials found in PubMed, Cochrane Library, and three Chinese databases were selected. RevMan 5.2 software was used to analyze the data with relative risk or mean difference, expressed with 95% of confidence interval. The quality of trials was assessed and gradedthe quality of evidence with GRADE profiler ***: Twenty one studies were included. CHM was superior to Western Medicine(include prednisone and NSAIDs) in abating fever, relieving thyroid pain, recovering blood sedimentation, improving thyroid function, and preventing hypothyroidism(P0.05) were found in recovering blood sedimentation and improving thyroid function. The incidence of adverse reactions in treatment group was lower than that in control group(relative risk was 0.12 and 95% confidence interval was 0.03-0.51). The methodological quality of trials is generally poor with a high risk of ***: CHM(particularly CHM combined withWestern Medicine) used to treat subacute thyroiditis may improve clinical symptoms and signs,reduce relapse rate, and alleviate the side effects of hormones. Due to poor methodological quality of included trials, further more high-quality studies are warranted to confirm the effectiveness and safety of CHM.

关键词： Drugs, Chinese herbal Thyroiditis, sub-acute Randomized controlled trial Review, system-atic

Simulation of top-down crack propagation in asphalt pavements

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第3期11卷 223-230页

作者： hui luo Hong-ping ZHU Yu MIAO Chuan-yao CHEN School of Civil Engineering and Mechanics Huazhong University of Science and TechnologyWuhan 430074China Hubei Key Laboratory of Control Structure Huazhong University of Science and TechnologyWuhan 430074China

Top-down crack in asphalt pavements has been reported as a widespread mode of failure.A solid understanding of the mechanisms of crack growth is essential to predict pavement performance in the context of thickness design,as well as in the design and optimization of *** the coupled element free Galerkin (EFG) and finite element (FE) method,top-down crack propagation in asphalt pavements is numerically simulated on the basis of fracture mechanics.A parametric study is conducted to isolate the effects of overlay thickness and stiffness,base thickness and stiffness on top-down crack propagation in asphalt *** results show that longitudinal wheel loads are disadvantageous to top-down crack because it increases the compound stress intensity factor (SIF) at the tip of top-down crack and shortens the crack path,and thus the fatigue life *** SIF experiences a process "sharply ascending—slowly descending—slowly ascending—sharply ascending again" with the crack *** thicker the overlay or the base,the lower the SIF; the greater the overlay stiffness,the higher the *** crack path is hardly affected by stiffness of the overlay and base.

关键词： Road engineering Top-down crack Coupled element free Galerkin (EFG) and finite element (FE) method Stress intensity factor (SIF) Crack propagating path

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毕节山地玉米田间杂草种类及危害程度调查

杂草学报 2024年第1期42卷 17-30页

作者：王晓宇曾松罗金仁王顺清罗会贵州大学生命科学学院贵州贵阳550025 贵州省果树科学研究所贵州贵阳550006 广西田园生化股份有限公司广西南宁530001

为明确毕节山地玉米种植区田间杂草的组成以及群落结构特征,采用倒置“W”九点取样法于2023年7月对毕节地区的玉米田杂草发生种类及危害情况进行调查。结果表明,毕节地区玉米田杂草184种,隶属于47科140属,其中双子叶杂草153种,单子叶杂... 详细信息

为明确毕节山地玉米种植区田间杂草的组成以及群落结构特征,采用倒置“W”九点取样法于2023年7月对毕节地区的玉米田杂草发生种类及危害情况进行调查。结果表明,毕节地区玉米田杂草184种,隶属于47科140属,其中双子叶杂草153种,单子叶杂草31种,分别占样方中杂草种类的83.16%和16.84%。优势杂草主要有菊科(共37种,占20.11%)、禾本科(共24种,占13.04%)、蓼科(共16种,占8.70%);通过优势度分析,相对多度最大的是升马唐,为31.49,其次是粗毛牛膝菊和狗尾草,分别为28.43和27.69。发生广泛且危害严重的有粗毛牛膝菊、升马唐、狗尾草、繁缕、鬼针草;其次是腺梗豨莶、细柄野荞麦、阿拉伯婆婆纳、尼泊尔蓼、野艾蒿、酢浆草、铁苋菜、裂苞铁苋菜、藜、打碗花、小蓬草、牛筋草、野草香、反枝苋和续断菊。

关键词：玉米田杂草种类优势度相对多度危害程度

Optical transparent metamaterial structure for microwave-infrared-compatible camouflage based on indium tin oxide

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中国科学:技术科学英文版 2023年第10期66卷 2850-2861页

作者： luo hui XIONG Yao CHENG YongZhi CHEN Fu LI XiangCheng School of Information Science and Engineering Wuhan University of Science and TechnologyWuhan 430081China State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081China

A visible transparent metamaterial absorber was designed and fabricated with ultrabroadband microwave absorption and low infrared emissivity to meet the increasing demand for multispectral compatible camouflage. The absorber was fabricated with a low-infrared emissive layer at the top, a microwave-absorbing layer in the middle, and a reflective layer at the bottom, which were separated by polymethyl methacrylate plates. The absorber showed an average visible transmittance of 55%, infrared emissivity of ~0.37, and effective microwave absorption bandwidth of 32.1 GHz with a total thickness of 3.0 mm. Furthermore,microwave absorption exhibited wide-angle stability and polarization insensitivity characteristics. The mechanism of microwave attenuation was further explored through effective electromagnetic parameters as well as surface current, electric field, magnetic field, and energy loss density distributions. The experimental results were consistent with those of the simulations and calculations, indicating the potential of the designed metamaterial absorber for future applications in multispectral compatible camouflage.

关键词： optical transparent microwave absorption metamaterial low infrared emissivity indium tin oxide

A Facile Synthetic Approach to Reduced Graphene Oxide-Fe_3O_4 Composite as High Performance Anode for Lithium-ion Batteries

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Journal of Materials Science & Technology 2014年第8期30卷 759-764页

作者： Yanhong Chang Jing Li Bin Wang hui luo Linjie Zhi School of Civil and Environmental Engineering University of Science and Technology Beijing Key Laboratory of Educational Ministry for High Efficient Mining and Safety in Metal Mine University of Science and Technology Beijing National Center for Nanoscience and Technology School of Chemical and Biological Engineering University of Science and Technology Beijing

Reduced graphene oxide-Fe3O4（rGO—Fe3O4） composite has been prepared via a facile and effective hydrothermal method by synthesizing Fe3O4 nanospheres on the planes of reduced graphene oxide（rGO）.Characterizations suggest the successful attachment of Fe3O4 nanospheres to rGO *** rGO—Fe3O4composite（66.7 wt%of Fe3O4 in the composite） exhibits a stable capacity of 668 mAh g-1 without noticeable fading for up to 200 cycles in the voltage range of 0.001—3.0 V,and the superior performance of rGO-Fe3O4 is clearly established by comparison of the results with those from bare Fe3O4 nanospheres（capacity declined to 117 mAh g-1 only at the 200 th cycle）.The excellent electrochemical performance of rGO—Fe3O4 composite can be attributed to the fact that the uniform dispersion of the Fe3O4 nanospheres growing on the rGO sheets avoids aggregation during Li uptake-release cycling,which is desired for cycle ***,the rGO sheets afford not only elastic buffer to alleviate the volume variations of Fe3O4nanospheres,but also good ionic and electronic transport medium in the electrode.

关键词： Facile synthetic approach rGO Fe3O4 nanosphcres Composite Lithium-ion batteries High performance