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钢筋混凝土结构裂缝成因及解决方法浅议

晋城职业技术学院学报 2010年第3期3卷 58-60页

作者：梁冠华山西建筑职业技术学院太原030006

钢筋混凝土结构是目前国内建筑业应用最广泛的结构形式,但混凝土结构往往会因为出现裂缝而对其使用造成影响,严重的甚至会危及结构安全。而这种结构形式在我国还有很大的发展前景和使用市场,因此需详细分析裂缝产生的原因,提出解决的办法。

关键词：钢筋混凝土结构裂缝质量监督

Porcine pluripotent stem cells: progress, challenges and prospects

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Frontiers of Agricultural Science and Engineering 2019年第1期6卷 8-27页

作者： Jianyong HAN Yi-liang MIAO Jinlian hua Yan LI Xue ZHANG Jilong ZHOU Na LI Ying ZHANG Jinying ZHANG Zhonghua LIU State Key Laboratory for Agrobiotechnology College of Biological Sciences China Agricultural University Institute of Stem Cell and Regenerative Biology/College of Animal Science and Veterinary Medicine/Key Laboratory of Agricultural Animal Genetics Breeding and Reproduction of Ministry of Education Huazhong Agricultural University College of Veterinary Medicine/Shaanxi Centre of Stem Cells Engineering and Technology Northwest A&F University Key Laboratory of Animal Cellular and Genetic Engineering of Heilongjiang Province College of Life Science Northeast Agricultural University

Pluripotent stem cells(PSCs) are characterized by their capacity for high self-renewal and multiple differentiation potential and include embryonic stem cells, embryonic germ cells and induced PSCs. PSCs provide a very suitable model for the studies of human diseases, drugs screening, regenerative medicine and developmental biology research. Pigs are considered as an ideal model for preclinical development of human xenotransplantation, therapeutic approaches and regenerative medicine because of their size and physiological similarity to humans. However, lack of knowledge about the derivation, characterization and pluripotency mechanisms of porcine PSCs hinders progress in these biotechnologies. In this review, we discuss the latest progress on porcine PSCs generation, evaluation criteria for pluripotency, the scienti?c and technical questions arising from these studies. We also introduce our perspectives on porcine PSC research, in the hope of providing new ideas for generating naive porcine PSCs and animal breeding.

关键词： embryonic germ cells embryonic stem cells induced pluripotent stem cells pigs pluripotent stem cells

A Self-test Prediction Model to Determine the Probability Risk of Non-alcoholic Fatty Liver Disease

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Biomedical and Environmental Sciences 2020年第11期33卷 857-861页

作者： LI Qiang SHEN Qun Lun XU Chao Nan LI Ming liang MA Zhi Min ZHANG Shan CHEN Shuo ZHANG Min Ying ZHANG Jing Bo LIU Feng YANG Xing hua Beijing Physical Examination Center Beijing 100077China Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China Medical Engineering Department Peking University Third HospitalBeijing 100191China School of Public Health Beijing Municipal Key Laboratory of Clinical EpidemiologyCapital Medical UniversityBeijing 100069China Cente Of Quality Control and Improvement for Physical Check Up Beijing MunicipalityBeijing 100077China School of Medicine Nankai UniversityTianjin 300071China

Non-alcoholic fatty liver disease(NAFLD)is the most common liver disease in Asia.Several studies have shown that NAFLD is associated with obesity,insulin resistance,type 2 diabetes,hypertension,hyperlipidemia,and metabolic syndrome(MS)[1].Several studies concluded that indicators such as body mass index(BMI),waist circumference(WC)。

关键词： NAFLD Probability Liver

Landslide susceptibility mapping using an integrated model of information value method and logistic regression in the Bailongjiang watershed,Gansu Province,China

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Journal of Mountain Science 2017年第2期14卷 249-268页

作者： DU Guo-liang ZHANG Yong-shuang IQBAL Javed YANG Zhi-hua YAO Xin Key Laboratory of Neotectonic Movement and Geohazard Institute of GeomechanicsChinese Academg of Geological SciencesBeijing 100081China Department of Earth Sciences Abbottabad University of Science and TechnologyAbbottabad 22010Pakistan

Bailongjiang watershed in southern Gansu province, China, is one of the most landslide-prone regions in China, characterized by very high frequency of landslide occurrence. In order to predict the landslide occurrence, a comprehensive map of landslide susceptibility is required which may be significantly helpful in reducing loss of property and human life. In this study, an integrated model of information value method and logistic regression is proposed by using their merits at maximum and overcoming their weaknesses, which may enhance precision and accuracy of landslide susceptibility assessment. A detailed and reliable landslide inventory with 1587 landslides was prepared and randomly divided into two groups,(i) training dataset and(ii) testing dataset. Eight distinct landslide conditioning factors including lithology, slope gradient, aspect, elevation, distance to drainages,distance to faults, distance to roads and vegetation coverage were selected for landslide susceptibility mapping. The produced landslide susceptibility maps were validated by the success rate and prediction rate curves. The validation results show that the success rate and the prediction rate of the integrated model are 81.7 % and 84.6 %, respectively, which indicate that the proposed integrated method is reliable to produce an accurate landslide susceptibility map and the results may be used for landslides management and mitigation.

关键词： Logistic回归模型敏感性评价山体滑坡信息量法甘肃省中国流域故障距离

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补肾活血法治疗骨折的临床效果观察

中国当代医药 2013年第29期20卷 119-120页

作者：蔡伟华彭全林罗礼亮何汉宗江西省赣州市上犹县中医院骨伤科江西上犹341200

目的观察补肾活血疗法治疗骨折的临床效果。方法选取本院收治的骨折患者100例,随机分为对照组和观察组。对照组患者采用西医治疗,观察组患者采用中医补肾活血法治疗,比较两组患者的治疗效果。结果观察组的有效率为92.0%,显著高于对照组... 详细信息

目的观察补肾活血疗法治疗骨折的临床效果。方法选取本院收治的骨折患者100例,随机分为对照组和观察组。对照组患者采用西医治疗,观察组患者采用中医补肾活血法治疗,比较两组患者的治疗效果。结果观察组的有效率为92.0%,显著高于对照组的70.0%(P<0.05)。结论采用补肾活血法对骨折患者进行治疗,可有效改善患者的临床症状,提高患者的骨密度,加快骨骼愈合,值得临床推广应用。

关键词：补肾活血法骨折中医

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模拟尾流泡幕及实际尾流光学性质对比研究

光子学报 2007年第10期36卷 1920-1923页

作者：张建生林书玉何俊华陈良益陕西师范大学物理系西安工业大学数理系西安710032 中国科学院西安光学精密机械研究所

对模拟尾流泡幕及实际尾流光学性质进行了对比研究.结果表明,实验室模拟尾流气泡幕的散射光平均照度均值随着压强变化梯度大,可据此定性区别不同压强的气泡幕.实际尾流随着航速增大,散射光照度减小,但这种减小不是线性的.散射光照度一... 详细信息

对模拟尾流泡幕及实际尾流光学性质进行了对比研究.结果表明,实验室模拟尾流气泡幕的散射光平均照度均值随着压强变化梯度大,可据此定性区别不同压强的气泡幕.实际尾流随着航速增大,散射光照度减小,但这种减小不是线性的.散射光照度一定周期性的规律,说明随着航速的增大,尾流气泡幕逐渐增强,气泡幕中气泡密度、不同直径气泡分布等均随之变化,这可能预示着气泡幕的增强存在饱和度.实验室模拟尾流气泡幕与实际尾流的散射光信号在轮廓方面是相似的,都随着压强或航速的增加而减小.通过比较实验室模拟气泡幕和实际尾流的差值信号,可以有效地消除杂散光或自然光的影响,利用Haar小波对差值信号的分析也得到相同的结论.

关键词：光学性质尾流气泡幕小波 Haar小波

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白三叶品种在川中地区的生长适应性研究

西南农业学报 2012年第3期25卷 1119-1122页

作者：朱永群庞良玉林超文张建华黄晶晶罗付香四川省农业科学院土壤肥料研究所四川成都610066

通过在川中地区对4个白三叶品种进行4年的生长适应性研究,并对其物候期、株高、叶片大小、匍匐枝数、产量等进行观测。结果表明,4个白三叶品种都能很好地适应该地区的气候和土壤条件;从物候期来看,‘艾丽斯’的生育期最短,且返青期最早... 详细信息

通过在川中地区对4个白三叶品种进行4年的生长适应性研究,并对其物候期、株高、叶片大小、匍匐枝数、产量等进行观测。结果表明,4个白三叶品种都能很好地适应该地区的气候和土壤条件;从物候期来看,‘艾丽斯’的生育期最短,且返青期最早,其次是‘海法’;从农艺性状来看,‘艾丽斯’具有植株高大、匍匐分枝数最多等特点,其次是‘海法’,再其次是‘瑞文德’,最差的是‘那努克’;从干草产量来看,4年平均产量‘艾丽斯’(9950 kg/hm2)极显著高于‘瑞文德’和‘那努克’(P<0.01),显著高于‘海法’(P<0.05)。从田间的表现看来,‘艾丽斯’在4个参试品种中综合表现最佳,是该地区的首推白三叶品种;其次是‘海法’、‘瑞文德’、‘那努克’。

关键词：白三叶适应性川中地区品比试验

基于三维激光点云数据获取树木几何参数的研究

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陕西林业科技 2020年第2期48卷 14-17,37页

作者：王天罡贾红波梁兵琳张丽华李虹朱佳琦北京市京西林场北京102300 北京市林业勘察设计院北京100029

无人机(Unmanned Aerial Vehicle,UAV)遥感可快捷获取高分辨率正射影像。本文探讨利用无人机采集高分辨率影像,生成三维点云数据获取树高和冠幅,并与实测数据对比。实验地点选择北京市京西林场,采用无人机搭载激光雷达扫描系统获取点云... 详细信息

无人机(Unmanned Aerial Vehicle,UAV)遥感可快捷获取高分辨率正射影像。本文探讨利用无人机采集高分辨率影像,生成三维点云数据获取树高和冠幅,并与实测数据对比。实验地点选择北京市京西林场,采用无人机搭载激光雷达扫描系统获取点云数据,使用LiDAR360软件进行数据处理分析,获取树木位置、株数、树高、树冠直径等信息,并与实测数据对比,结果表明:最大类间方差法可分割树木点云数据;利用三维点云技术可获取树木高度及冠幅;树高提取平均精度为94%,冠幅提取平均精度为89%。

关键词：无人机遥感技术树高冠幅

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蛋白石薄膜及其异质结构的可控制备

青岛大学学报（自然科学版） 2008年第4期21卷 46-50页

作者：张琳万勇李洪亮夏临华赵修松 Frank Marlow 青岛大学纤维新材料与现代纺织国家重点实验室培育基地多功能材料研究所青岛大学化学化工与环境学院青岛大学物理科学学院 Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 145470 Mülheim an der RuhrGermany

利用毛细管辅助沉积方法制备了厚度及膜内裂缝的形状、分布可控的三维蛋白石薄膜。讨论了所得薄膜光学性质以及膜的形态特性与薄膜厚度之间的关系。用同样的方法制备了由不同粒径的球体基元晶体带构成的横向交替异质结构。

关键词：控制生长毛细管蛋白石薄膜蛋白石异质结构