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Prevention of peripherally inserted central catheter-related infections in very low-birthweight infants by using a central line bundle guideline with a standard checklist

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International Journal of Nursing Sciences 2016年第1期3卷 50-53页

作者： Chen Yuan Qing Zhao xiaoyan song Fei Meng Qingdao Center Medical Group QingdaoShandong ProvinceChina

Objective:To investigate the effectiveness and feasibility of using a central line bundle(CLB)guideline with a standard checklist in the prevention of peripherally inserted central catheter(PICC)-related infections(CRIs)in very low-birth-weight infants(VLBWIs).Methods:Fifty-seven VLBWIs who underwent PICC insertion at a hospital in Qingdao,China,between November 2012 and June 2013,were monitored with the CLB guideline and a standard checklist.Fifty-three VLBWIs who underwent PICC insertion were monitored by standard hospital procedures.The incidence of CRIs was compared between the two groups.Results:The incidence of infection significantly decreased from 10.0%catheter days in the control group to 2.2%catheter days in the study group(p<0.05).The indwelling catheter time significantly increased in the study group compared to the control group(31.9±15.0days vs.24.8±7.4 days,respectively,p<0.05).Colonization infections also decreased from 6.9% catheter days in the control group to 2.2%catheter days in the study group(p<0.05).The incidence of catheter-related bloodstream infections decreased from 3.1%catheter days in the control group to 0%catheter days in the study group.Conclusion:The use of a CLB guideline with a standard checklist could be an effective and feasible protocol for preventing CRIs and prolonging indwelling catheter timein VLBWIs.

关键词： Central line bundle Checklist Very low birth weight infant PICC Catheter related infection

Grain size effect on wear resistance of WC-Co cemented carbides under different tribological conditions

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Journal of Materials Science & Technology 2019年第11期35卷 2435-2446页

作者： Haibin Wang Mark Gee Qingfan Qiu Hannah Zhang Xuemei Liu Hongbo Nie xiaoyan song Zuoren Nie College of Materials Science and Engineering Key Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaBeijing University of TechnologyBeijing 100124China National Physical Laboratory Hampton RoadTeddingtonTW110LWUK Xiamen Tungsten Co. Ltd.Xiamen 361009China

The grain-size dependence of wear resistance of WC-Co cemented carbides(with mean WC grain sizes of 2.2μm,1.6μm,0.8μm and 0.4μm,respectively)was investigated under different tribological conditions.The results showed that the grain size had opposite effects on wear resistance of the cemented carbides in dry sliding wear and microabrasion tests.In the former condition,with decrease of WC grain size hence the increase of hardness,plastic deformation,fracture,fragmentation and oxidation were all mitigated,leading to a drastic decrease in the wear rate.In the latter condition,pull-out of WC grains after Co removal dominated the wear,so that the hardness of cemented carbide was not a core factor.As a result,the wear resistance of the cemented carbide generally showed a decreasing trend with decrease of the grain size,except for a slight increase in the ultrafine-grained cemented carbide.Single-pass scratching of the cemented carbides under various loads indicated the same failure mechanism as that in the sliding wear tests.Furthermore,the reasons for severe surface oxidation of the coarse-grained cemented carbides were disclosed.

关键词： Cemented carbide Grain size Fracture Surface oxidation Grain pull-out Wear resistance

Tree barks as a natural trap for airborne spores and pollen grains from China

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Chinese Science Bulletin 2014年第19期59卷 2331-2339页

作者： xiaoyan song Subir Bera Yifeng Yao David K.Ferguson Chengsen Li College of Agronomy Shanxi Agricultural University State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Department of Botany University of Calcutta Department of Paleontology University of Vienna Althanstrasse 14 A-1090 Vienna Austria

The present article deals with the use of tree barks as a natural trap for airborne spores and pollen grains in China.The study carried out at the southern part of Beijing Botanical Garden,Institute of Botany,Chinese Academy of Sciences has yielded a variety of palynomorphs mostly belonging to tree taxa.New methodologies for extraction of palynomorphs from tree barks have been suggested.Bark samples were collected from three taxa,i.e.,Paulownia fortunei Hemsl.(Scrophulariaceae),Quercus dentata Thunb.(Fagaceae),and Picea meyeri Rehder&E.H.Wilson(Pinaceae)having different bark morphologies.P.fortunei with a comparatively soft and fissured bark is believed to have a greater potential for trapping airborne spores and pollen grains compared to the stiff and less fissured barks of Q.dentata and the scaly bark of P.meyeri.Old barks yield better data in terms of quantity and quality of trapped pollen and spores.The present study throws new light on the modern pollen rain,spore-pollen dispersal,and their deposition in and aroundBeijing Botanical Garden,and other different parts of China.

关键词：中国科学院现代花粉雨树皮形态孢子陷阱天然北京植物园植物研究所

燃气管道泄漏爆炸应急救援物资需求及救援点优化选址研究

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安全与环境学报 2024年第3期24卷 1136-1142页

作者：宋晓燕李啸然梁忠秋李瑞华北科技学院安全工程学院河北廊坊065201 首都经济贸易大学管理工程学院北京100070 中煤科工集团沈阳研究院有限公司沈阳110141

为研究燃气管道泄漏爆炸后的应急救援物资需求量和最佳救援点选址,采用案例推理方法,建立了燃气管道泄漏爆炸事故应急资源需求模型。以某化工园区发生燃气管道泄漏爆炸为案例,运用MATLAB编程对应急资源需求进行数值计算;利用ArcGIS可视... 详细信息

为研究燃气管道泄漏爆炸后的应急救援物资需求量和最佳救援点选址,采用案例推理方法,建立了燃气管道泄漏爆炸事故应急资源需求模型。以某化工园区发生燃气管道泄漏爆炸为案例,运用MATLAB编程对应急资源需求进行数值计算;利用ArcGIS可视化、地图数据分析功能,建立网络空间数据集,获得该案例工业园区6个应急救援点。结果表明,可通过化工园区应急救援历史数据获得事故应急资源需求量,利用ArcGIS建立位置分配点和确定救援点数量,可获得优化的应急救援选址。

关键词：公共安全燃气管道应急物资案例推理

Circadian Rhythm of Calling Behavior in the Emei Music Frog(Babina daunchina) is Associated with Habitat Temperature and Relative Humidity

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Asian Herpetological Research 2011年第3期2卷 149-154页

作者： Jianguo CUI xiaoyan song Guangzhan FANG Fei XU Steven E. BRAUTH Yezhong TANG Chengdu Institute of Biology Chinese Academy of Sciences Sichuan Institute of Animal Sciences Department of Psychology University of MarylandCollege Park

Generally, the function of vocalizations made by male anurans are to attract females or defend resources. Typically, males vocalize in choruses during one or more periods in a twenty-four-hour cycle, which varies, however, among species. Nevertheless, the causal factors influencing circadian variations of calling patterns in anuran species are not clear. In this study, male chorus vocalizations were monitored in the Emei music frog(Babina daunchina) for 17 consecutive days during the breeding season, while its habitat air temperature and relative humidity in the course of experiments were measured as well. The results revealed that the circadian calling patterns were characterized by two periods of peak vocalization, which were observed from 0500 h to 0700 h and from 1300 h to 2000 h, while the lowest activity period was found from 2100 h to 2200 h. Both calls/h and notes/h were positively correlated with air temperature and negatively with relative humidity. Overall, our data indicate that the Emei music frogs(B. daunchina) could regulate their vocal activities based on the changes of physical micro-environment(e. g., temperature or humidity) to maximize reproductive success.

关键词： rest-activity cycle advertisement call temperature humidity Emei music frog(Babina daunchina

TMEM67基因变异所致Meckel综合征1例胎儿的遗传学分析

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中华医学遗传学杂志 2024年第2期41卷 221-224页

作者：唐慧宋小艳翁欣刘敏娟赵楠楠南京医科大学附属苏州医院苏州市立医院生殖与遗传中心苏州215002

目的对1例Meckel综合征(MKS)胎儿进行产前诊断,明确其致病原因。方法选取2018年2月就诊于苏州市立医院的1例孕妇作为研究对象,收集其临床信息。采集引产胎儿肌肉组织标本以及孕妇夫妇的外周血样,进行染色体微阵列分析(CMA)和全外显子组... 详细信息

目的对1例Meckel综合征(MKS)胎儿进行产前诊断,明确其致病原因。方法选取2018年2月就诊于苏州市立医院的1例孕妇作为研究对象,收集其临床信息。采集引产胎儿肌肉组织标本以及孕妇夫妇的外周血样,进行染色体微阵列分析(CMA)和全外显子组测序,并用Sanger测序对候选变异进行验证。结果孕18周超声提示胎儿存在小头畸形、小脑香蕉征、多囊肾和羊水过少。引产后观察到胎儿脑膨出、多指和肾脏囊形结构。胎儿CMA检测未见异常。基因测序提示引产胎儿TMEM67基因存在母源c.296delA(p.Lys99SerfsTer6)和父源c.1243G>A(p.Val415Met)变异。根据美国医学遗传学与基因组学学会变异相关指南,c.296del被评级为致病性变异(PVS1+PM2Supporting+PP4),c.1243G>A被评级为可能致病性变异(PM2Supporting+PM3+PP3Moderate+PP4)。结论TMEM67基因c.296delA和c.1243G>A变异可能是该MKS胎儿的遗传学病因。

关键词： Meckel综合征 TMEM67基因全外显子组测序

基于应用型人才培养的汽车运用技术课程教学改革与实践

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时代汽车 2024年第5期 43-45页

作者：刘菲菲宋小艳沈阳城市建设学院辽宁省沈阳市110000

本文以职业能力为导向重塑课程模块、教学逻辑,建立了与各职业能力模块相匹配的考核内容,有效地促进了学生的学习投入,使学生初步具备岗位能力,能够真正地达到学以致用。基于应用型人才培养的汽车运用技术课程教学改革有效地提升了教学... 详细信息

本文以职业能力为导向重塑课程模块、教学逻辑,建立了与各职业能力模块相匹配的考核内容,有效地促进了学生的学习投入,使学生初步具备岗位能力,能够真正地达到学以致用。基于应用型人才培养的汽车运用技术课程教学改革有效地提升了教学目标的完成度。

关键词：应用型人才培养教学改革与实践

Evaluate the Investment Efficiency by Using Data Envelopment Analysis: The Case of China

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American Journal of Operations Research 2012年第2期2卷 174-182页

作者： Hualun Zhang Wei song Xiaobao Peng xiaoyan song School of Public Affairs University of Science and Technology of China Hefei China

Although investment is regarded as a key force of China’s economic growth, little study has been done to measure China’s investment efficiency. The present paper applies the data envelopment analysis (DEA) to Chinese provincial panel data from the year 2003 to 2008 for measuring the investment efficiencies and identifying their trends of Chinese 30 provinces and autonomous regions. A cross-efficient DEA model with considering benevolent formulation is used for providing accurate efficiency scores and completely ranking. The empirical results suggest that the differences of investment efficiency in different regions are distinct but tending to diminish year by year, and the investment efficiencies in some provinces are significantly correlated to their investment rates to the national total investment.

关键词： Aggregate Investment Efficiency Data Envelopment Analysis (DEA)

微柱凝胶技术与凝聚胺技术在ABO新生儿溶血病输血前检测中应用对比

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临床研究 2024年第3期32卷 109-111页

作者：张冰宋小彦崔静辉郑州市第一人民医院输血科河南郑州450000

目的对比分析微柱凝胶技术与凝聚胺技术在ABO新生儿溶血病输血前检测中的应用。方法将郑州市第一人民医院2020年1月至2023年5月ABO新生儿溶血病患儿(88例)作为研究对象,依据区间随机法将其分为对照组、研究组,各纳入44例,对照组行输血... 详细信息

目的对比分析微柱凝胶技术与凝聚胺技术在ABO新生儿溶血病输血前检测中的应用。方法将郑州市第一人民医院2020年1月至2023年5月ABO新生儿溶血病患儿(88例)作为研究对象,依据区间随机法将其分为对照组、研究组,各纳入44例,对照组行输血治疗前开展凝聚胺技术检验血型配血,研究组输血治疗前开展微柱凝胶技术检验血型配血。比较两组检验符合率、一次性交叉配血成功率。结果研究组正定型、反定型符合率(100.00%、100.00%)均高于对照组(86.36%、86.36%),两组差异有统计学意义(P<0.05);研究组交叉配血成功率(100.00%)高于对照组(86.36%),两组差异有统计学意义(P<0.05)。结论对比凝聚胺技术,微柱凝胶技术在ABO新生儿溶血病输血前检测中的应用价值更高,有利于提升输血安全,值得应用。

关键词：微柱凝胶技术凝聚胺技术 ABO新生儿溶血病输血前检测输血安全