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Experimental and numerical interpretation on composite foundation consisting of soil-cement column within warm and ice-rich frozen soil

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Journal of Mountain Science 2024年第1期21卷 313-321页

作者： WANG Honglei zhang Jianming WEI shoucai SUN Zhizhong zhang Hu School of Civil Engineering Hebei University of EngineeringHandan 056038China State Key Laboratory of Frozen Soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Second Geological Brigade Bureau of Geology and Mineral Resources Exploration and DevelopmentLhasa 850000China Da Xing’anling Observation and Research Station of Frozen Ground Engineering and Environment Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesJiagedaqi 165100China School of Civil Engineering Northeast Forestry UniversityHarbin 150040China

Affected by climate warming and anthropogenic disturbances, the thermo-mechanical stability of warm and ice-rich frozen ground along the Qinghai-Tibet engineering corridor(QTEC) is continuously decreased, which may delay the construction of major projects in the future. In this study, based on chemical stabilization of warm and icerich frozen ground, the soil-cement column(SCC) for ground improvement was recommended to reinforce the foundations in warm and ice-rich permafrost regions. To explore the validity of countermeasures mentioned above, both the original foundation and the composite foundation consisting of SCC with soil temperature of -1.0℃ were prepared in the laboratory, and then the plate loading tests were carried out. The laboratory investigations indicated that the bearing capacity of composite foundation consisting of SCC was higher than that of original foundation, and the total deformation of original foundation was greater than that of composite foundation, meaning that overall stability of foundation with warm and ice-rich frozen soil can be improved by SCC installation. Meanwhile, a numerical model considering the interface interaction between frozen soil and SCC was established for interpretating the bearing mechanism of composite foundation. The numerical investigations revealed that the SCC within composite foundation was responsible for the more applied load, and the applied load can be delivered to deeper zone in depth due to the SCC installation, which was favorable for improving the bearing characteristic of composite foundation. The investigations provide the valuable guideline for the choice of engineering supporting techniques to major projects within the QTEC.

关键词： Chemical stabilization Ground improvement Composite foundation Frozen soil engineering Qinghai-Tibet engineering corridor

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Biomimetic Moth-eye Anti-reflective Poly-(methyl methacrylate)Nanostructural Coating

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Journal of Bionic Engineering 2019年第6期16卷 1030-1038页

作者： Hongbo Xu Liuting Gong shoucai zhang Renping Ma Lei Pan Jiupeng Zhao Yao Li MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Beijing Institute of Space Mechanics and Electricity Beijing 100094China Beijing Vocational College of Labour and Social Security Beijing 102200China Center for Composite Material Harbin Institute of TechnologyHarbin 150001China

This study reports a simple imprinting method for the fabrication of biomimetic moth-eye antireflective polymethyl methacrylate(PMMA)nanostructures on the surface of the substrate.The antireflection structured silicon was obtained by Reactive Ion Etching(RIE)method.By using the antireflection structured silicon substrate as the imprinting stamp,the biomimetic moth-eye polymer structures showed tapered holes,whose depth and periodicity were around 780 nm and 580 nm,respectively.The reflectance of the resulting PMMA structures was reduced from 10% to less than 1% in the wavelength range from 300 nm to 1600 nm.This simple methodology can be scaled up via self-loading and nanoimprinting,which may have a promising application in optoelectronic devices and solar cells.

关键词： nanoimprinting sub-wavelength structure antireflective biomimetic moth-eye

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平行磁场对含V型缺陷的管线钢的腐蚀行为影响

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表面技术 2024年第2期53卷 78-87页

作者：王浩千王丹侯政煜梁守才张晓龙谢飞辽宁石油化工大学石油天然气工程学院辽宁抚顺113001 中石油辽河油田油气集输公司辽宁盘锦124010

目的研究平行磁场对含V型腐蚀缺陷的X70管线钢在库尔勒土壤模拟溶液中的腐蚀行为影响。方法利用失重法来计算含V型腐蚀缺陷的X70管线钢在不同平行磁场强度下的腐蚀速率。采用扫描电子显微镜和X射线光电子能谱(XPS)对V型槽槽内外腐蚀... 详细信息

目的研究平行磁场对含V型腐蚀缺陷的X70管线钢在库尔勒土壤模拟溶液中的腐蚀行为影响。方法利用失重法来计算含V型腐蚀缺陷的X70管线钢在不同平行磁场强度下的腐蚀速率。采用扫描电子显微镜和X射线光电子能谱(XPS)对V型槽槽内外腐蚀样貌及腐蚀产物进行分析,并分析出各腐蚀产物相对含量。结果发现平行磁场的加入,加速了V型槽槽外的腐蚀,减缓了V型槽槽内的腐蚀。随着磁场强度的增加,平行磁场对V型槽槽外和槽内的促进及抑制作用加强,无磁场时V型槽槽外腐蚀产物为Fe_(2)O_(3),然而随着磁场强度的增加,V型槽槽外腐蚀产物Fe_(2)O_(3)的相对含量增多,单质Fe的相对含量减少。而V型槽槽内的腐蚀产物Fe_(2)O_(3)随着磁场强度的增加逐渐减少,并且在40 mT时腐蚀产物变化为Fe_(3)O_(4),70 mT时腐蚀产物变化为FeO。结论平行磁场的存在加速了V型槽槽外腐蚀,抑制了V型槽槽内腐蚀,并随着磁场强度的增加,磁场对管线钢腐蚀的促进及抑制作用均增强。本文的研究结果对理解管线钢在磁场作用下的腐蚀失效行为有一定的参考价值。

关键词：平行磁场腐蚀 X70钢 V型缺陷库尔勒土壤

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不同植被模式对矿山废弃地表层土壤性质的影响

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中国水土保持科学 2024年第2期22卷 131-137页

作者：张可郑岩刘传林张军魏守才徐海东高芳磊夏江宝山东农业大学林学院泰山森林生态系统国家定位观测研究站山东泰安271018 滨州学院山东省黄河三角洲生态环境重点实验室山东滨州256603 山东高速鸿林工程技术有限公司济南250001

为揭示露天矿山废弃地不同原生植被对地表土壤的影响规律,探索其适宜的植被恢复模式,选取山东省泰安市东平县金山矿区“狗牙根(G)”“酸枣+狗牙根(SG)”“酸枣+荆条+狗牙根(SJG)”“臭椿+榆树+酸枣+狗牙根(CYSG)”4种植被模式为研究对象... 详细信息

为揭示露天矿山废弃地不同原生植被对地表土壤的影响规律,探索其适宜的植被恢复模式,选取山东省泰安市东平县金山矿区“狗牙根(G)”“酸枣+狗牙根(SG)”“酸枣+荆条+狗牙根(SJG)”“臭椿+榆树+酸枣+狗牙根(CYSG)”4种植被模式为研究对象,并以裸地为对照,测定土壤密度、土壤持水量、孔隙度等土壤物理参数和有机碳、碱解氮、有效磷、速效钾等土壤养分指标,运用主成分分析和模糊数学隶属函数方法,综合评价不同植被模式对其表层土壤的影响。结果表明:1)植被模式对露天矿山废弃地的土壤水分物理特征影响明显,土壤含水量和孔隙度与裸地相比均出现不同程度的增加,表现为SJG>CYSG>SG>G,土壤密度与裸地相比显著降低,表现为SJGCYSG>SG>G,土壤全磷与有效磷含量的大小顺序为CYSG>SJG>SG>G。植被混交模式对矿山废弃地土壤水分物理与土壤养分的影响优于裸地与单一植被模式,不同植被模式的综合改良效果为SJG>CYSG>SG>G。

关键词：林草措施矿区修复土壤水分土壤孔隙土壤养分

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昆明长水国际机场北斗CORS建设及应用服务

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测绘通报 2024年第S1期 86-90页

作者：张君华王友昆丁仁军董国桥寸寿才熊建华昆明市测绘研究院云南昆明650051

本文针对昆明长水国际机场的建设需求和安全考虑,设计并实施了昆明长水国际机场北斗地基增强卫星定位系统(CSCORS),旨在为机场改扩建工程提供高精度、高时空分辨率、高覆盖率的实时定位服务。通过在机场区域新建基准站,并开发CSCORS服... 详细信息

本文针对昆明长水国际机场的建设需求和安全考虑,设计并实施了昆明长水国际机场北斗地基增强卫星定位系统(CSCORS),旨在为机场改扩建工程提供高精度、高时空分辨率、高覆盖率的实时定位服务。通过在机场区域新建基准站,并开发CSCORS服务管理平台,实现了系统的独立运营和高精度定位服务,范围覆盖了机场规划区域,基准框架解算精度达到了规范要求。此外,建立了监测体系,通过监测站实时感知CSCORS网内定位精度状态。系统测试结果显示,CSCORS在功能性和性能指标方面表现良好,监测情况显示系统运行稳定,定位精度满足需求。实际应用中,CSCORS为机场改扩建项目提供了可靠的定位服务,取得了显著效益。本文总结了系统的优势和贡献,为北斗卫星导航系统的推广应用提供了参考。

关键词：北斗地基增强卫星定位服务系统基准站监测站连续运行参考站系统测试

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昆明CORS整合及升级设计与建设

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工程勘察 2024年第5期52卷 44-48,65页

作者：王友昆丁仁军寸寿才董国桥张君华昆明市测绘研究院昆明650051 武汉大学测绘学院武汉430079

本文主要介绍了昆明市卫星定位综合服务系统(KMCORS)整合和升级建设的背景、设计思路、建设内容和建设成效。项目对已有的两套CORS系统进行整合和升级,建设覆盖昆明全市域的基准站网,融合多个品牌接收机观测数据,实现多部门基准站观测... 详细信息

本文主要介绍了昆明市卫星定位综合服务系统(KMCORS)整合和升级建设的背景、设计思路、建设内容和建设成效。项目对已有的两套CORS系统进行整合和升级,建设覆盖昆明全市域的基准站网,融合多个品牌接收机观测数据,实现多部门基准站观测数据的共享。KMCORS整合及升级后,全面支持北斗卫星导航系统,覆盖范围更广、精度更高,面向社会公众可实现线上一站式的管理和服务。同时,构建第一个城市连续运行参考站系统(CORS)监测运行体系,实现对CORS运行状态的全天候监测。项目的建设方法和过程,可为其他城市CORS升级改造提供参考。

关键词：连续运行参考站系统全球卫星导航系统整合升级卫星定位

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Overexpression of the maize GRF10, an endogenous truncated growth-regulating factor protein, leads to reduction in leaf size and plant height

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Journal of Integrative Plant Biology 2014年第11期56卷 1053-1063页

作者： Lei Wu Dengfeng zhang Ming Xue Jianjun Qian Yan He shoucai Wang National Maize Improvement Center of China Key Laboratory of Maize Biology and Genetic Breeding of Ministry of AgricultureChina Agricultural University Institute of Crop Science The Chinese Academy of Agricultural Sciences

It has long been thought that growth‐regulating factors（GRFs） gene family members act as transcriptional activators to play important roles in multiple plant developmental processes. However, the recent characterization of Arabidopsis GRF7 showed that it functions as a transcriptional repressor of osmotic stress‐responsive genes. This highlights the complex and diverse mechanisms by which different GRF members use to take action. In this study, the maize（Zea mays L.） GRF10 was functionally characterized to improve this concept. The deduced ZmGRF10 protein retains the N‐terminal QLQ and WRC domains, the characteristic regions as protein‐interacting and DNA‐binding domains, respectively. However,it lacks nearly the entire C‐terminal domain, the regions executing transactivation activity. Consistently, ZmGRF10 protein maintains the ability to interact with GRF‐interacting factors（GIFs） proteins, but lacks transactivation activity.Overexpression of ZmGRF10 in maize led to a reduction in leaf size and plant height through decreasing cell proliferation,whereas the yield‐related traits were not affected. Transcriptome analysis revealed that multiple biological pathways were affected by ZmGRF10 overexpression, including a few transcriptional regulatory genes, which have been demonstrated to have important roles in controlling plant growth and development. We propose that ZmGRF10 aids in fine‐tuning the homeostasis of the GRF‐GIF complex in the regulation of cell proliferation.

关键词： GIF growth-regulating factor maize overexpression RNA-Seq transcriptional activator

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Estimating the Impacts of Sulphur Dioxide on Rice via Chlorophyll and Peroxidase Activity Transmittance Spectra Prediction Models

Estimating the Impacts of Sulphur Dioxide on Rice via Chloro...

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作者： Jinheng zhang Chao Han shoucai zhang Institute of Eco-Environment and Agriculture Information and College of Environment and Safety EngineeringQingdao University of Science and Technology Qingdao Academy of Agricultural Sciences

Exposure of rice to high SO levels caused chlorophyll loss and increased peroxidase activity.The leaf transmittance spectra of three rice varieties were measured at different growth stages to select the characteristic wavebands.In order to estimate the impacts of SO on rice chlorophyll and peroxidase activity via transmittance spectra prediction models,it is necessary to develop and validate transmittance spectra vegetation indices which were calculated by utilizing transmittance spectra characteristic wavebands.Some indices called blue/yellow/red/ edge transmissivity spectra ratio of the difference vegetation indices(BTI/YTI/BTI) were calculated using selected characteristic wavebands.The chlorophyll content and peroxidase activity had more significant correlations(P < 0.01) to these indices than to single characteristic waveband.Variation coefficients of correlations coefficients were reduced and less than 10%using these vegetation indices except for the correlation coefficients between peroxidase activity and three indices(YTI,BTI and RTI).Regression analysis indicted that YTI,YTI,YTI,YTI and YTI were the good predictors indicator estimating peroxidase activity and chlorophyll content,and YTI was proved an effective method to estiamte chlorophyll content with liner regression models.

关键词： Sulphur Dioxide Rice Chlorophyll Peroxidase Activity Transmittance Spectra

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Fine Mapping of RppP25, a Southern Rust Resistance Gene in Maize

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Journal of Integrative Plant Biology 2013年第5期55卷 462-472页

作者： Panfeng Zhao Guobin zhang Xiaojun Wu Na Li Dianyi Shi Dengfeng zhang Chunfang Ji Mingliang Xu shoucai Wang National Maize Improvement Center of China Key Laboratory of Biology and Genetic Improvement of Maize (Ministry of Agriculture) China Agricultural University National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI) Institute of Crop ScienceChinese Academy of Agricultural Sciences

Southern rust （Puccinia polysora Underw.） is a major disease that can cause severe yield losses in maize （Zea mays L.）. In our previous study, a major gene RppP25 that confers resistance to southern rust was identified in inbred line P25. Here, we report the fine mapping and candidate gene analysis of RppP25 from the near-isogenic line F939, which harbors RppP25 in the genetic background of the susceptible inbred line F349. The inheritance of resistance to southern rust was investigated in the BC1F1 and BC3F1 populations, which were derived from a cross between F939 and F349 （as the recurrent parent）. The 1：1 segregation ratio of resistance to susceptible plants in these two populations indicated that the resistance is controlled by a single dominant gene. Ten markers, including three simple sequence repeat （SSR） markers and seven insertion/deletion （InDel） markers, were developed in the RppP25 region. RppP25 was delimited to an interval between P091 and M271, with an estimated length of 40 kb based on the physical map of B73. In this region, a candidate gene was identified that was predicted to encode a putative nucleotide-binding site leucine-rich repeat （NBS-LRR） protein. Two co-segregated markers will aid in pyramiding diverse southern rust resistance alleles into elite materials, and thereby improve southern rust resistance worldwide.

关键词： Fine mapping maize Puccinia polysora resistance gene southern rust.

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Significance of neuroglobin in serum of acute atherosclerotic cerebral infarction patients

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Neural Regeneration Research 2011年第27期6卷 2140-2145页

作者： shoucai Zhao Zhaohu Chu Lingsong Ma Yinong Chen Lei Wang Benxiao Wang Zili Huang Jun zhang Department of Neurology Yijishan Hospital Wannan Medical College Wuhu 241001 Anhui Province China

This study sought to examine neuroglobin （NGB） in the serum of acute cerebral infarction patients with double-antibody sandwich enzyme-linked immunosorbent assay to identify all risk factors, calculate infarct size, assess neurological impairment, and analyze the relation between NGB and each of these factors. The double-antibody sandwich assay indicated that levels of NGB in serum were unaltered within 6 hours following acute cerebral infarction compared with normal levels. NGB levels then underwent a distinct change, peaking at 24 hours then returning to normal levels in 72 hours. The results suggest that the level of NGB might be related to infarct size and low-density lipoprotein at 24 hours after acute cerebral infarction. There were no significant differences in neurological impairment scores and infarct size at different periods following infarction. The findings indicated that the level of NGB in serum of acute cerebral infarction patients was correlated with infarct time.

关键词： neuroglobin acute cerebral infarction onset time morbidity infarct size neurological impairment score

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