信息技术助项目管理更上台阶     

于铁兵  宋彤琴 《中国勘察设计》2008,(7)

中国石油天然气管道工程有限公司(CPPE)是国家管道勘查设计行业的指导型企业,承担了众多国内外大型石油天然气管道勘查设计任务。信息技术手段是提升企业生产管理水平的重要工具,通过《公司协同设计管理平台》的建设,公司在设计项目管理方面取得了很大的进步,进一步优化了生产管理业务流程,提高了工作质量与效率,为今后的信息化工作积累了宝贵的经验。  相似文献   

Assessment of different mcy genes for detecting the toxic to non-toxic Microcystis ratio in the field by multiplex qPCR     

左俊  陈莉婷  闪锟  胡丽丽  宋立荣  甘南琴 《中国海洋湖沼学报》2018,(4)

Harmful cyanobacterial blooms, especially Microcystis blooms, occur worldwide and draw widespread attention. The dynamics of microcystin-producing Microcystis and competition between microcystin-producing Microcystis and non-microcystin-producing Microcystis are key to predicting and treating Microcystis blooms. Multiplex qPCR is a useful tool to assess such issues. In this study, we developed multiplex qPCR methods with newly-designed probes and primers for the microcystin-synthesis related genes mcyA and mcyE. We used seven toxic Microcystis strains and four non-toxic Microcystis strains to compare the differences in the ratios of toxic and non-toxic Microcystis in mixed cultures, which were calculated using abundances of the genes mcyA, mcyB, mcyD, mcy E and phycocyanin( PC). We also compared traditional cell counting and multiplex qPCR. Hierarchical clustering and principal component analysis indicated that mcyD was the most suitable mcy gene for quantification in laboratory experiments. mcyB abundances were always higher; we suggest that the amount of toxic Microcystis measured using mcyB might overestimate the actual percentages.  相似文献   

Fast adsorption of microcystin-LR by Fe(Ⅲ)-modified powdered activated carbon     

戴国飞  甘南琴  宋立荣  方少文  彭宁彦 《中国海洋湖沼学报》2018,(4)

Microcystins(MCs) are cyclic hepatotoxic peptides produced by the bloom-forming cyanobacterium Microcystis and present a public health hazard to humans and livestock. The removal of MCs from contaminated water with powdered activated carbon(PAC) has been employed as a simple and economic treatment strategy. In this study, PAC-Fe(Ⅲ) was prepared and utilized for the fast and efficient removal of MCs from water. PAC-Fe(Ⅲ) exhibited superior microcystin-LR(MC-LR) removal capacity and efficiency compared to the unmodified PAC. The MC-LR removal efficiency of PAC-Fe(Ⅲ) increased with decreasing p H within the pH range of 4.3 to 9.6. PAC-Fe(Ⅲ) could be reused for 3 times by methanol elution while the MC-LR removal efficiency was still over 70 percent. The removal efficiency was positively correlated to the ionic strength of water and negatively correlated to alkalinity. Natural organic matter(NOM) such as humic acid(HA) and salicylic acid(SA) generated low interference with MC-LR adsorption by PAC-Fe(Ⅲ). The complexation reaction between Fe~(3+) in PAC-Fe(Ⅲ) and the functional groups of MCLR was suggested as the key mechanism of MC-LR removal by PAC-Fe(Ⅲ). The results suggest that Femodified PAC is a promising material for the treatment of MC-contaminated waters.  相似文献   

泥蚶(Tegillarca granosa)重组铁蛋白富集锰铁后的磁学性质解析     

吴燕  魏梦泽  苏倡  明庭红  蒋琴琴  司开学  周君  苏秀榕 《海洋与湖沼》2018,49(1):168-173

利用埋栖性双壳类生物泥蚶(Tegillarca granosa)重组铁蛋白富集锰铁的性质,在不同锰铁浓度下制备Fe-铁蛋白和Mn-铁蛋白磁性纳米颗粒,通过扫描电镜观察高、中和低三个浓度下制备Fe-铁蛋白和Mn-铁蛋白磁性纳米颗粒的表面形貌,通过PPMS综合物性测量系统测定Fe-铁蛋白和Mn-铁蛋白磁性纳米颗粒的磁学性质。结果显示,在低浓度(0.1mmol/L)锰铁制备的Fe-铁蛋白和Mn-铁蛋白磁性纳米颗粒粒径均一,分散性好;发现Fe-铁蛋白和Mn-铁蛋白的磁滞回线均表现为超顺磁性,且随着重组铁蛋白对锰铁富集量的增加,磁性强度随之增大,增加速率逐渐减小。通过本实验探索高、中和低三个浓度下制备Fe-铁蛋白和Mn-铁蛋白磁性纳米颗粒的磁化强度变化规律,为Fe-铁蛋白和Mn-铁蛋白磁性纳米颗粒的应用提供数据支持。  相似文献   

地震科学的发展及其图书资料的分类     

何如琴 《国际地震动态》1999,(5):16-18

以中国地震局地球物理研究所图书资料为例,概述了中国地震科学及其图书资料的发展历史,分析了当前存在的分类与学科发展的不适应情况,最后就进一步完善分类法提出了一些建设性意见。  相似文献   

PET重力仪与CTS-1EF地震计地震波记录特征分析   总被引：1，自引：1，他引：0  

李盛  郭昱琴  张慧  李志雄  彭利媚 《地震地磁观测与研究》2018,39(3):128-133

收集苍梧M 5.2、九寨沟M 7.0和智利M 8.2地震期间琼中基准地震台PET重力仪和CTS-1EF地震计观测数据,对重力资料进行潮汐和零漂改正获得重力残差数据,并对地震计数据求导得到加速度值。对重力残差数据和地震计加速度数据波形及频谱曲线进行对比分析,认为2种观测仪器记录的地震波震相和频谱分析显示的地震波分布频率具有一致性,但九寨沟M 7.0地震和智利M 8.2地震的地震波频率分布存在差异。  相似文献   

海南翁田台地电场数据质量及频谱分析     

郭明瑞  王锡娇  卢启明  李冬雅  庞雪华  郭昱琴  解晓静 《地震科学进展》2024,(2):153-158+174

地电场观测系统的观测对象是地电场强度矢量,其目的是通过观测地表的地电场强度,探索地震前地电场的变化,获得地下电性结构及其变化规律,开展孕震过程中大地电场的变化特征研究。本文对翁田台地电场自建台以来的数据进行了详细的梳理,通过计算差值和相关系数来分析数据自运行以来的质量情况,总结数据质量较好的原因,并对下一步如何提高数据质量给出一些建议。翁田台地电场观测数据曲线存在明显1峰1谷的日变形态,对其进行频谱分析,优势周期为24、12、6 h,以24 h为主。运用优势方位角的方法计算发现,2017—2018年优势方位角存在收窄和偏转现象,对该异常进行了分析与探讨。  相似文献   

抛物线Radon变换方法在压制地震多次波中的应用     

龚术  任琴琴  王敏玲 《CT理论与应用研究》2017,26(2):165-176

多次波的存在会降低地震资料的信噪比,影响地震资料处理效果和后续的地质解释精度,压制多次波干扰是地震资料处理中的一个重要环节。利用有限差分方法正演模拟几个典型地质模型的地震波场,之后进行动校正,再通过抛物线Radon变换方法把t-x域一次反射波和多次波变换到τ-q域,由于存在速度的差异,Radon域记录中的一次反射波和多次波的能量互相分开,在Radon域对多次波的能量切除,保留反射波的有效信息,达到压制多次波的效果,提高资料的信噪比。通过对实际地震数据进行抛物线Radon变换结果也进一步验证了该方法在压制多次波中的应用效果。   相似文献   

琼中台FGM-01磁通门磁力仪观测数据浅析     

韦汾余  吴一凡  郑丽东  吴佳林  郭昱琴 《内陆地震》2019,(2):174-180

为了确保琼中台FGM-01磁通门磁力仪观测数据的准确性,对琼中台多套地磁相对记录仪分钟数据作相关系数分析,及对其观测基线值作月剩余标准差处理和日均差值对比分析,分析结果得出FGM-01仪的观测精度及稳定性较差。  相似文献   

近百年来长江河口航道拦门沙的形态演变(英文)     

和玉芳  程和琴  陈吉余 《地理学报(英文版)》2013,23(2):219-230

The mouth bar in the Yangtze estuarine waterways has a significant influence on navigational transport within the estuary,flood discharge and construction of the Shanghai Port.In this paper the morphological evolution and mechanisms of mouth bar formation of the Yangtze estuarine waterways are studied by analyzing hundreds of years of historical data and the latest profile maps of some or the main mouth bar channels in the Yangtze Estuary.The results are shown as follows:The mouth bars in the North Branch have moved gradually from outside the mouth to the inside and formed a huge sand bar.In the North Channel,the head of the mouth bar has migrated about 30 kilometers downstream,and a channel bar has been developing since 2001.Two mouth bar tops,which always existed in the North Passage,disappeared in 2010.The head of the mouth bar in the South Passage has migrated downstream about 14 km and the number of tops increased at first but is reduced to only one now.According to the results,we can conclude that the evolution of the mouth bars differs depending on their location.In the North Branch it is directly related to large-scale reclamation in Chongming Island,but in the North Passage it has a close relationship with regulation of the Yangtze Estuary Deepwater Channel.However,the evolution of mouth bars in the North Channel and South Passage is not only connected with the Yangtze Estuary Deepwater Channel Regulation Project,but also with the reclamation in the East Hengsha Shoal and the closure of the Qingcaosha Reservoir.  相似文献