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中小跨径柱式墩桥梁摩擦桩的设计与计算

山西建筑 2015年第26期41卷 168-169页

作者：张学喜安徽省水利水电勘测设计院安徽合肥230085

介绍了钻孔灌注桩的分类及选择方式,对钻孔灌注桩的计算要点进行了分析,并采用m法和有限元方法,结合工程实例对桩身内力进行计算,同时对计算结果做了有益的分析,可为桥梁设计人员提供一定的参考依据。

关键词：桥梁盖梁计算模型钻孔灌注桩

基于中医体质辨识治疗痰湿体质原发性高血压2级的临床观察

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中国中医药现代远程教育 2017年第24期15卷 74-76页

作者：邱展业阙庆辉柯俊华张学曦薛善乐张丽瑛福建中医药大学附属康复医院老年康复科福州350003 福建省康复技术重点实验室福州350003

目的探讨在中医体质辨识基础上应用中医药综合治疗痰湿体质原发性高血压2级患者的临床疗效。方法将60例属于痰湿体质的原发性高血压2级患者随机分为治疗组和对照组,治疗组在常规口服西药治疗的基础上应用中医药综合治疗,对照组采用常规... 详细信息

目的探讨在中医体质辨识基础上应用中医药综合治疗痰湿体质原发性高血压2级患者的临床疗效。方法将60例属于痰湿体质的原发性高血压2级患者随机分为治疗组和对照组,治疗组在常规口服西药治疗的基础上应用中医药综合治疗,对照组采用常规口服西药治疗。结果疗程结束后治疗组患者在降压效果上优于对照组(P<0.05)。结论口服西药降压基础上应用中医药综合治疗干预可显著改善痰湿体质原发性高血压2级患者的健康问卷评分,提高降压效果。

关键词：中医体质辨识原发性高血压2级痰湿体质眩晕

26例胸内局限性Castleman病诊治分析

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国际呼吸杂志 2017年第15期37卷 1150-1153页

作者：张学习张散羊任淑华于正伦张曙光李文雅张其刚中国医科大学附属第一医院胸外科沈阳110001 沈阳市第四人民医院老年病科循环病房 110000 唐山工人医院胸外科 063000

目的探讨胸内局限性Castleman病的诊断及治疗，提高对该病的认识及诊治水平。方法回顾性分析2010年1月至2016年12月中国医科大学附属第一医院胸外科诊治的26例胸内局限性Castleman病患者的临床资料及病理资料。结果26例患者中男14例，... 详细信息

目的探讨胸内局限性Castleman病的诊断及治疗，提高对该病的认识及诊治水平。方法回顾性分析2010年1月至2016年12月中国医科大学附属第一医院胸外科诊治的26例胸内局限性Castleman病患者的临床资料及病理资料。结果26例患者中男14例，女12例；中位年龄为36．5（24．8～69．3）岁；病程中位数为2．8（o．2～7．8）个月。所有患者均行手术治疗，其中常规开胸手术16例，电视辅助胸腔镜手术10例。26例患者术后均获得随访，中位随访时间为46．6（4．2～70．6）个月。22例病理类型为透明血管型，4例为浆细胞型。除1例浆细胞型Castleman病患者于术后42个月复发外，其余患者术后均达到持续完全缓解，复发患者行术区局部放疗后目前处于部分缓解。结论胸内局限性Castleman病手术治疗效果良好，尤其是透明血管型术后无复发，但浆细胞型术后有复发的可能性。

关键词： Castleman病局限性临床特点治疗

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气道支架在儿童气管支气管软化的应用及进展

国际呼吸杂志 2021年第15期41卷 1172-1177页

作者：贾欣蓓张欣周钢张雪溪邱悦张杰王生才秦汉关夏莉张利闯邰隽国家儿童医学中心首都医科大学附属北京儿童医院耳鼻咽喉头颈外科100045 国家儿童医学中心首都医科大学附属北京儿童医院大数据和工程研究中心100045 北京航空航天大学生物与医学工程学院生物力学与力生物学教育部重点实验室100191 首都儿科研究所附属儿童医院耳鼻咽喉科北京100020

儿童气管支气管软化是临床比较罕见且棘手的儿童呼吸道疾病,植入气道支架则可有效地缓解病情进展。目前硅酮、金属材质的气道支架已经广泛地应用于成人气道狭窄疾病的治疗,并取得了良好的成效。近些年3D打印技术和组织工程学相结合,个... 详细信息

儿童气管支气管软化是临床比较罕见且棘手的儿童呼吸道疾病,植入气道支架则可有效地缓解病情进展。目前硅酮、金属材质的气道支架已经广泛地应用于成人气道狭窄疾病的治疗,并取得了良好的成效。近些年3D打印技术和组织工程学相结合,个性化设计的可降解支架也逐步进入人们视野,成为更有发展潜力的气道支架。但是儿童气道口径小,随着年龄逐渐增大,解剖和生理特性与成人不同,因此儿童气道支架的选择有着与成人不同的特点。目前国内学者对于在儿童体内植入气道支架经验认识也尚且不足。本综述就国内外应用较为广泛的治疗儿童气管支气管软化的支架优缺点和未来发展方向进行阐述。

关键词：气道支架气管支气管软化儿童 3D打印生物可降解

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基于图论的彩色图像快速分割方法研究

计算机应用与软件 2009年第7期26卷 240-241,250页

作者：张学习杨宜民曹志广夏益民何启承广东工业大学自动化学院广东广州510090

基于图论的图像分割方法作为一种全局的分割方法,当图像的信息量增大时,问题求解将非常耗时。提出一种基于图论的彩色图像快速分割方法,该方法首先用区域生长法将彩色图像划分为内部相似的一些区域,再用最小支撑树MST(Minimum span-ning... 详细信息

基于图论的图像分割方法作为一种全局的分割方法,当图像的信息量增大时,问题求解将非常耗时。提出一种基于图论的彩色图像快速分割方法,该方法首先用区域生长法将彩色图像划分为内部相似的一些区域,再用最小支撑树MST(Minimum span-ning tree)方法在这些区域之间进行分割,产生最终的分割图像。以彩色图像作为研究对象,实验结果表明,相对于传统的MST图论分割方法,该方法在取得较好分割效果的同时,提高了分割速度。

关键词：彩色图像分割图论区域生长最小支撑树目标函数

Grain size distribution at four developmental stages of crescent dunes in the hinterland of the Taklimakan Desert,China

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Journal of Arid Land 2016年第5期8卷 722-733页

作者： JIA Wenru zhang Chunlai LI Shengyu WANG Haifeng MA xuexi WANG Ningbo State Key Laboratory of Earth Surface Processes and Resource Ecology Ministry of Education Engineering Center of Desertification and Blown-sand Control Beijing Normal University Beijing 100875 China Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China Xinjiang Academy of Forestry Science Urumqi 830046 China

Although scientists have performed many studies on crescent （barchan） dunes in the Taklimakan Desert,few studies reported the changes in grain size at different development stages of crescent *** order to evaluate the changing trends of surface sediment grain size with dune development,we investigated the grain size characteristics at four developmental stages （oval sand pile,shield dune,incipient crescent dune and mature crescent dune） of crescent dunes by measuring the morphology of sand dune and observing the near-surface wind *** dunes have developed in a wide inter-dune corridor between high compound longitudinal ridges in China＇s Taklimakan *** surface sediments at four developmental stages of the crescent dunes were primarily composed of fine sands,followed by very fine and medium *** grain sizes ranged from 2.8 to 3.1 φ,with a unimodal *** sands were moderately well-sorted,their distribution varied from platykurtic to very platykurtic,and symmetrical or skewed towards the fine *** oval sand piles through shield and incipient crescent dunes to mature crescent dunes,incipient grain size gradually increased,particles became finer,sorting became better,kurtosis and skewness *** sizes on the surface layer became coarser upwards from the toe of the windward slope and then became finer towards the bottom of the leeward *** found that the coarsest particles at different positions at the four developmental stages were *** coarsest particles were distributed at the top of the oval sand piles and shield dunes,versus at the middle of the windward slope of the incipient and mature crescent *** between the mean grain size and other grain size parameters showed that as mean grain size became finer,sorting became better and kurtosis became wider,but skewness changed only *** addition,grain size variation in the surface sediments correlated with the movement speed of the dunes

关键词： crescent dune developmental stage grain size Taklimakan Desert

Mapping the resting cysts of dinoflagellate Alexandrium catenella along the coast of Qinhuangdao,China

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Journal of Oceanology and Limnology 2022年第6期40卷 2312-2321页

作者： Wenjiao TANG Huixia GENG Yanjuan XI Qingchun zhang xuexi TANG Rencheng YU College of Marine Life Science Ocean University of ChinaQingdao 266003China CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Key Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Hebei Academy of Ocean and Fishery Science Qinhuangdao 066200China

Dinoflagellate Alexandrium catenella is a cosmopolitan bloom-forming species with complex life cycle,the formation and germination of resting cysts are critical for its bloom *** the coastal waters of Qinhuangdao,*** has been identified as the major causative agent for paralytic shellfish poisoning,but there is little knowledge concerning its resting cysts in this *** this study,three surveys were carried out along the coast of Qinhuangdao from 2020 to 2021 to map the distribution of *** resting cysts,using a quantitative PCR(qPCR)assay specific for *** resting cysts were detected in surface sediments during all the three surveys,and their distribution patterns were *** abundance of resting cysts(maximum 1300 cysts/g sediment(wet weight))were found in a region(119.62°E-119.99°E,39.67°N-39.98°N)northeast to the coastal waters of Qinhuangdao,where surface sediments were mainly composed of clay and silt(percentage above 50%).Prior to the formation of the *** bloom in March 2021,the abundance of *** vegetative cells in seawater had extremely significant positive correlation with the abundance of resting cysts in surface sediments,reflecting the important role of resting cysts in the initiation of *** *** far as we know,this is the first report on the distribution of *** cysts along the coast of *** results will of fer a sound basis for the future monitoring and mitigation of toxic *** blooms and paralytic shellfish poisoning events in this region.

关键词： harmful algal bloom(HAB) Alexandrium catenella resting cyst paralytic shellfish toxin(PST) Qinhuangdao

The effects of enriched C0_(2) and enhanced UV-B radiation on ultrastructure of Dunaliella salina, singly and in combination

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Acta Oceanologica Sinica 2006年第1期25卷 137-146页

作者： YU Juan XIAO Hui TIAN Jiyuan zhang Peiyu DONG Shuanglin TANG xuexi Division of Life Science and Technology Ocean University of China Qingdao 266003 China Department of Environmental Science and Engineering Qingdao University Qingdao 266071 China

The effects of ambient CO2/ambient UV-B, enriched CO2/ambient UV-B, ambient CO2/enhanced UV-B, and enriched CO2/enhanced UV-B on the ultrastructure of Dunaliella salina were investigated. （1） The ultrastructure of D..salina cell in the control experiment showed that the arrangement of thylakoid lamellae was regular, and there were many large starch grains among the thylakoid lamellae. A prominent well-developed pyrenoid was found in the middle of the chloroplast. Nucleus envelope and nucleolus were clearly observed. The Golgi apparatus accompanied by numerous vesicles with a compact arrangement of cisternae and the peripheral tips of the cisternae were swollen to a size comparable to that of some of the associated vesicles. （2） The ultrastructure of D. salina cell in enriched CO2 showed that the arrangement of thylakoid was regular and the lamellae were vivid. Developed pyrenoids were found in the low-CO2-grown cells, but not in the high-CO2-grown cells. The mitochondria cristae were vivid. The arrangement of Golgi apparatus was compact. （3） The ultrastructure of D. salina cell in enhanced UV-B showed that the thylakoid was dissolved and the cells had a less developed pyrenoid or no detectable pyrenoid. Part of the nucleus envelope was dissolved. The number ofmitochondria was increased and some mitochondria cristae were disintegrated. The starch grains were broken apart into many small starch grains. The Golgi apparatus with a loose arrangement ofcistemae and the peripheral tips of the Golgi cistemae were not especially swollen, with several large associated vesicles. （4） The ultrastructure of D. salina cell in the enriched CO2/enhanced UV-B showed that part of the thylakoid and nucleus envelopes of some cells were dissolved. The pyrenoid was larger than that of the enhanced UV-B. There were many mitochondria between stroma and chloroplast membrane, but mitochondria cristae were partly dissolved. Many small starch grains were accumulated in cells. The starch sheath

关键词： enriched CO2 enhanced UV-B radiation ultrastructure Dunaliella salina

Analysis of the causes of heavy aerosol pollution in Beijing,China:A case study with the WRF-Chem model

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Particuology 2015年第3期13卷 32-40页

作者： Hui He xuexi Tie Qiang zhang Xiange Liu Qian Gao Xia Li Yang Gao Beijing Weather Modification Office Key Laboratory of Aerosol Science and Technology SKLLQGInstitute of Earth EnvironmentChinese Academy of Sciences National Center for Atmospheric Research

The causes and variability of a heavy haze episode in the Beijing region was analyzed. During the episode, the PM2.5 concentration reached a peak value of 450 μg/kg on January 18, 2013 and rapidly decreased to 100μg/kg on January 19, 2013, characterizing a large variability in a very short period. This strong vari- ability provides a good opportunity to study the causes of the haze formation. The in situ measurements （including surface meteorological data and vertical structures of the winds, temperature, humidity, and planetary boundary layer （PBL）） together with a chemical/dynamical regional model （WRF-Chem） were used for the analysis. In order to understand the rapid variability of the PM2.5 concentration in the episode, the correlation between the measured meteorological data （including wind speed, PBL height, relative humidity, etc.） and the measured particle concentration （PM2.5 concentration） was studied. In addition, two sensitive model experiments were performed to study the effect of individual contribution from local emissions and regional surrounding emissions to the heavy haze formation. The results suggest that there were two major meteorological factors in controlling the variability of the PM2.5 concentration, namely, surface wind speed and PBL height. During high wind periods, the horizontal transport of aerosol particles played an important role, and the heavy haze was formed when the wind speeds were very weak （less than 1 m/s）. Under weak wind conditions, the horizontal transport of aerosol particles was also weak, and the vertical mixing of aerosol particles played an important role. As a result, the PBL height was a major factor in controlling the variability of the PM2.5 concentration. Under the shallow PBL height, aerosol particles were strongly confined near the surface, producing a high surface PM2.5 concentration. The sensitivity model study suggests that the local emissions （emissions from the Beijing region only） were the major cause for

关键词： PM2.5 in BeijingCauses of heavy hazePlanetary boundary layer (PBL)WRF-Chem model