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Experimental and Numerical Study on the Bubble Dynamics near Two-Connected Walls with An Obtuse Angle

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China Ocean Engineering 2020年第6期34卷 828-839页

作者： li shi-min CUI pu ZHANG Shuai liU Wen-tao PENG Yu-xiang College of shipbuilding Engineering Harbin Engineering UniversityHarbin 150001China

This study is concerned with the dynamic characteristics of bubbles near two connected walls(one horizontal and the other inclined with an obtuse angle from the horizontal one). In this study, we set up an experiment system to conduct typical cases, and the boundary element method is employed to explain the bubble behavior and study the effect of relative parameters. Comparing the two mutually perpendicular walls, we find that the liquid jet deviates from the horizontal direction within a much shorter range. On the intersection of the two walls, the motions of bubbles have similar trends. The relatively low pressure between the bubble and walls causes the transition of the bubble, and a local high-pressure zone leads to the formation of a liquid jet. Moreover, there are moments when the two walls are evenly stressed in the first bubble cycle. Through parameter analysis, we find that the jet directions of bubbles perform interesting discrepancies for different buoyancy and distances to walls. Some instructive conclusions are given to serve practical applications.

关键词： bubble dynamics solid walls liquid jets

Correlation between single nucleotide polymorphism of rs3811047 in IL-1 F7 gene and rheumatoid arthritis susceptibility among Han population in central plains of China

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Asian Pacific Journal of Tropical Medicine 2013年第1期6卷 73-75页

作者： li-pu shi Ya He Zhi-Dui liu Department of Rheumatology People's Hospital of Zhengzhou

Objective:To discuss the association between single nucleotide polymorphism(SNP) of rs3811047 in IL-1 F7 gene and rheumatoid arthritis(RA) susceptibility among the Han population in central plains of ***:A total of 276 RA patients admitted to our hospital from December 2009 to December 2011 together with 276 healthy physical examinees in the same period were chosen as the *** typing for rs3811047 SNP in IL-1 F7 gene was carried out by using ligase detection reaction and polymerase chain reaction *** the frequency of each allele and genotypes distribution was calculated so as to evaluate the association between genotype distribution and RA ***:The frequency of A allele of rs3811047 in IL-1 F7 gene in RA group and control group was 16.27%and 17.68%,respectively,and that of G allele in two groups was 83.73%and 82.32%,*** difference between two groups wasn’t statistical significant(P >0.05).The frequency of genotype AA,AG and GG in RA group was 2.19%,27.84%and 69.97%,respectively,while that in control group was 2.94%,29.78%and 67.28%, *** difference of distribution of three genotypes was not statistically significant (P >0.05).RA patients with A allele were better than those without A allele in joint swelling index, rest pain,HAQ scoring and blood *** was significant difference between two groups in above indexes(Plity among the Han population in central plains of China and rs3811047 SNP inIL-1 F7 gene is ***,A allele of rs3811047 has certain influence on the condition of RA patients.

关键词： Rheumatoid arthritis IL-1 F7 gene Single nucleotide polymorphism Susceptibility

代用盐对辽宁彰武农村高血压患者血压影响的随机双盲对照试验

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中国实用内科杂志 2010年第6期30卷 552-553页

作者：王海龙杨永庆时景璞李辉周波付凌雨王文力富增国吕刚沈阳中国医科大学附属第一医院临床流行病教研室沈阳110001 辽宁省彰武县卫生局辽宁阜新123200 辽宁省彰武县疾病控制中心辽宁阜新123200

目的观察食用代用盐对高血压患者血压及心血管疾病事件发生的影响。方法 2005年4月,选择辽宁省彰武县农村地区的104例高血压及心脑血管疾病患者作为研究对象,随机分为代用盐组和普通盐组;进行1年的随访观察,测量血压、心血管事件的发生... 详细信息

目的观察食用代用盐对高血压患者血压及心血管疾病事件发生的影响。方法 2005年4月,选择辽宁省彰武县农村地区的104例高血压及心脑血管疾病患者作为研究对象,随机分为代用盐组和普通盐组;进行1年的随访观察,测量血压、心血管事件的发生情况。结果代用盐组和普通盐组收缩压及舒张压均比基线时降低,代用盐组比普通盐组收缩压降低幅度多10.31mmHg(P0.05);而在≥60岁组,代用盐组比普通盐组收缩压降低幅度多18.15mmHg(P<0.05),舒张压多10.86mmHg(P<0.05)。结论使用代用盐可以降低中国北方地区高血压及心脑血管疾病患者的血压水平。

关键词：代用盐高血压

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针刺对肺癌手术患者肿瘤坏死因子水平的影响

上海针灸杂志 2004年第12期23卷 20-21页

作者：周红童稳圃施伶俐闵屹华上海市肺科医院针麻研究室 200433

目的　探讨针刺对肺癌手术患者血清肿瘤坏死因子 (TNF)水平变化及免疫机制的影响。方法　采用双抗体夹心免疫酶标法 (EL TSA)检测肺癌患者血清中肿瘤坏死因子含量 ;针药麻组与全麻组肺癌手术患者各 2 5例 ,分别在术前、术后第 1d、术后... 详细信息

目的　探讨针刺对肺癌手术患者血清肿瘤坏死因子 (TNF)水平变化及免疫机制的影响。方法　采用双抗体夹心免疫酶标法 (EL TSA)检测肺癌患者血清中肿瘤坏死因子含量 ;针药麻组与全麻组肺癌手术患者各 2 5例 ,分别在术前、术后第 1d、术后第 8d测量 TNF含量作比较。结果　血清中肿瘤坏死因子含量在术前和术后第 1d作两组比较 ,无显著差异 (P>0 .0 5 ) ;在术后第 8d作两组比较 ,有显著性差异 (P<0 .0 5 ) ,针药麻组明显优于全麻组。结论　针刺能降低肺癌手术患者血清中肿瘤坏死因子含量 ,对肺癌手术患者有免疫调节功能。

关键词：针刺肺癌手术患者肿瘤坏死因子

大中小学思政课区域一体化的价值意蕴、驱动要素与推进策略

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东北师大学报（哲学社会科学版） 2025年第1期 10-18页

作者：李爱琴师海娟东北林业大学马克思主义学院黑龙江哈尔滨150040

大中小学思政课区域一体化是大中小学思政课一体化的重要组成部分和重点建设方向,其核心要义在于区域教育主体突破学段和校际壁垒,以共同体成员的协作互动促进思想政治教育资源在区域间的有序流动和优化配置,实现大中小学思政课区域一... 详细信息

大中小学思政课区域一体化是大中小学思政课一体化的重要组成部分和重点建设方向,其核心要义在于区域教育主体突破学段和校际壁垒,以共同体成员的协作互动促进思想政治教育资源在区域间的有序流动和优化配置,实现大中小学思政课区域一体化的整体内涵式发展。新时代持续推进大中小学思政课区域一体化走深走实,可广泛凝聚区域多主体人才协同共培的价值共识,形成多模态纵横连贯式的区域教育网络生态系统,全面提升大中小学思想政治教育区域一体化的建设质量。学校思想政治教育政策要求、新时代思政课改革创新发展诉求和学生个人成长发展需求对大中小学思政课区域一体化具有正向驱动作用,牵动着大中小学思政课区域一体化建设的“时”和“序”、“质”和“量”、“道”和“术”。深化大中小学思政课区域一体化建设,要健全常态长效运行机制,畅通区域管理行动经络;补足协同推进短板弱项,统筹区域格局协调发展;建立多元主题合作网络,深化区域合作互联互通;优化教育资源服务供给,实现区域资源无界共享。

关键词：大中小学思政课区域一体化立德树人思想政治教育

Stellar kinematics and populations out to 1.5 effective radii in the elliptical galaxy NGC 4636

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Research in Astronomy and Astrophysics 2011年第8期11卷 909-923页

作者： shi-Bi pu Zhan-Wen Han National Astronomical Observatory/Yunnan Observatory Chinese Academy of Sciences Kunming 650011 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory of the Structure and Evolution of Celestial Objects Chinese Academy of Sciences Kunming 650011 China

We present high quality long slit spectra along the major and minor axes out to 1.5 effective radii of the massive galaxy NGC 4636 taken by the Hobby-Eberly Telescope. Using the Fourier Correlation Quotient method, we measured the stellar line-of-sight velocity distribution along the axes. Furthermore, six lick/IDS indices （Hβ, Mgb, Fe5015, Fe5270, Fe5335, Fe5406） are derived from the clean spectrum. By comparing the measured absorption line strengths with the predictions of Simple Stellar Population （SSP） models, we derived ages, total metallicity and a abundance profiles of the galaxy. This galaxy presents old and [α/Fe] overabundant stellar populations. Indeed, using the SSP model, we obtained the broadband color profiles. The theoretical colors match well with the measured colors and present red sharp peaks at the galaxy center. The sharp peaks of the colors are mainly shaped by the high metallicity in the galaxy＇s center. Interestingly, the galaxy has steep negative metaUicity gradients, but the trend flattens outwards. This result likely suggests that the center and outer regions of the galaxy formed through different formation processes.

关键词： galaxy: elliptical and lenticular -- galaxy: abundances -- galaxy: kine- matic and dynamics -- galaxy: individual (NGC 4636)

Efficient electrocatalytic oxygen evolution at ultra-high current densities over 3D Fe,N doped Ni(OH)_(2) nanosheets

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Chinese Chemical Letters 2021年第3期32卷 1210-1214页

作者： pu shi Xiaodi Cheng Siliu Lyu Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China

Developing highly efficient nickel or iron based hydroxide electrocatalysts is primary essential but challenging for oxygen evolution reaction(OER)at ultra-high current ***,we developed a facile method to prepare nitrogen and iron doped nickel(Ⅱ)hydroxide nanosheets on self-supported conductive nickel foam(denoted as Fe,N-Ni(OH)_(2)/NF)through ammonia hydrothermal and impregnation *** to the optimization of the electronic structure by nitrogen doping and the strong synergistic effect between Fe and Ni(OH)_(2),the three-dimensional(3 D)Fe,N-Ni(OH)_(2)/NF nanosheets delivered superior electrocatalytic OER performances in basic solution with low potentials of 1.57 V and1.59 V under 500 mA/cm^(2)and 1000 mA/cm^(2)respectively and robust operation for 10 h with ignored activity decay,comparing well with the potentials of previously reported NiFe based electrocatalysts as well as the benchmark commercial Ir/C/***-situ Raman spectroscopy revealed that the main active species were NiOOH during the OER *** present results are expected to provide new insights into the study of OER process towards ultra-high current densities.

关键词： Vapor phase hydrothermal Nitrogen doped NiOOH Oxygen evolution reactio Ultra-high current density

A study of peroxyacetyl nitrate at a rural site in Beijing based on continuous observations from 2015 to 2019 and the WRFChem model

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Frontiers of Environmental Science & Engineering 2020年第4期14卷 189-199页

作者： Yulu Qiu Zhiqiang Ma Weili lin Weijun Quan Weiwei pu Yingruo li liyan Zhou Qingfeng shi Institute of Urban Meteorology China Meteorological AdministrationBeijing 100089China Beijing Shangdianzi Regional Atmosphere Watch Station Beijing 101507China Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei Beijing 100089China College of life&Environmental Science Minzu University of ChinaBeijing 100081China

Peroxyacetyl nitrate(PA N)is one of the most important photochemical pollutants and has aroused much concern in China in recent ***,few studies described the long-term variations in PAN in *** this study,we continuously monitored the PAN,03 and NOx concentrations at a regional background site near Beijing from August 2015 to February *** on the observed concentrations and climate data,w e analyzed the seasonal PAN *** results revealed that the monthly mean PAN concentration ranged from 0.33-2.41 ppb,with an average value of 0.94 *** PAN concentration exhibited a distinct seasonal variation,with high values in spring and low values in *** analyzing the corresponding meteorological data,we found that stronger ultraviolet(UV)radiation,a relatively longer lifetime and a higher background PAN concentration contributed to the high PAN concentrations in *** addition,with the utilization of the WRF-Chem(Weather Research and Forecasting with Chemistry)model,the cause of the extremely high PAN concentration in spring 2018 wa s *** model results demonstrated that an anomalously low pressure and the southwesterly winds in northern China might be the main causes of the increased PAN concentration in Beijing and its surrounding area in spring 2018.

关键词： PAN Ozone Beijing WRF-Chem

A Rubik’s microfluidic cube

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Microsystems & Nanoengineering 2020年第1期6卷 859-868页

作者： Xiaochen Lai Zhi shi Zhihua pu Penghao Zhang Xingguo Zhang Haixia Yu Dachao li State Key Laboratory of Precision Measurement Technology and Instruments Tianjin UniversityTianjin 300072China Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments Tianjin UniversityTianjin 300072China

A Rubik’s cube as a reconfigurable microfluidic system is presented in this *** of physically interlocking microfluidic blocks,the microfluidic cube enables the on-site design and configuration of custom microfluidics by twisting the faces of the *** reconfiguration of the microfluidics could be done by solving an ordinary Rubik’s cube with the help of Rubik’s cube algorithms and computer *** O-ring-aided strategy is used to enable self-sealing and the automatic alignment of the microfluidic cube *** to the interlocking mechanics of cube blocks,the proposed microfluidic cube exhibits good reconfigurability and robustness in versatile applications and proves to be a promising candidate for the rapid deployment of microfluidic systems in resource-limited settings.

关键词： fluid enable sealing