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关键词： galaxies   active galactic nuclei   radio galaxies   spectral classification   SKY SURVEY   CATALOG  

摘要： This is a detailed spectral classification of 96 active galaxies from the Veron-Cetty and Veron catalog (2010, Version 13, VCV-13) of active galaxies and quasars. These objects were identified as radio sources using standard radio catalogs. Those galaxies which had radio sources in at least 6 different radio bands and had been identified spectrally in the SDSS catalog were selected. The types of activity of these were determined using their SDSS spectra. Three diagnostic diagrams and a direct study of the spectra were used for more certain classification. As a result, the classifications of 85% of the objects were changed. The radio sources in different radio bands make it possible to construct the spectral distribution of the energy in the radio range and to compare it with the optical activity types.

关键词： Land cover classification   Sentinel   Google Earth Engine   Big data   Remote sensing   Iran   RANDOM FOREST   SAR DATA   MULTISOURCE   EXTRACTION   IMPLEMENTATION   NEWFOUNDLAND   MULTISENSOR   AUSTRALIA   PRODUCT   MODIS  

摘要： Accurate information about the location, extent, and type of Land Cover (LC) is essential for various applications. The only recent available country-wide LC map of Iran was generated in 2016 by the Iranian Space Agency (ISA) using Moderate Resolution Imaging Spectroradiometer (MODIS) images with a considerably low accuracy. Therefore, the production of an up-to-date and accurate Iran-wide LC map using the most recent remote sensing, machine learning, and big data processing algorithms is required. Moreover, it is important to develop an efficient method for automatic LC generation for various time periods without the need to collect additional ground truth data from this immense country. Therefore, this study was conducted to fulfill two objectives. First, an improved Iranian LC map with 13 LC classes and a spatial resolution of 10 m was produced using multi-temporal synergy of Sentinel-1 and Sentinel-2 satellite datasets applied to an object-based Random forest (RF) algorithm. For this purpose, 2,869 Sentinel-1 and 11,994 Sentinel-2 scenes acquired in 2017 were processed and classified within the Google Earth Engine (GEE) cloud computing platform allowing big geospatial data analysis. The Overall Accuracy (OA) and Kappa Coefficient (KC) of the final Iran-wide LC map for 2017 was 95.6% and 0.95, respectively, indicating the considerable potential of the proposed big data processing method. Second, an efficient automatic method was developed based on Sentinel-2 images to migrate ground truth samples from a reference year to automatically generate an LC map for any target year. The OA and KC for the LC map produced for the target year 2019 were 91.35% and 0.91, respectively, demonstrating the efficiency of the proposed method for automatic LC mapping. Based on the obtained accuracies, this method can potentially be applied to other regions of interest for LC mapping without the need for ground truth data from the target year.

关键词： Human hair   Label-free   Proteomics   Geometric   Racial   Biomarkers   BROMODOMAIN-CONTAINING PROTEINS   IDENTIFICATION TECHNOLOGY   HISTONE STRUCTURE   KERATINS   BIOLOGY   FRACTIONATION   ASSOCIATION   ANNOTATION   DIVERSITY   ETHNICITY  

摘要： Differences in the physiological proteome of men of different racial origin is poorly researched, albeit hair is mostly composed of keratins and keratin-associated proteins. Hence, we have carried out label-free, shotgun proteomics analysis on hair samples collected from black African, Caucasian, Asian, and Mixed-Ancestry donors within a heterogeneous population of the Western Cape of South Africa. Further, the same hair was also classified using geometrical measurements. Using both qualitative and quantitative proteomics bioinformatics pipelines, we identified over 450 protein groups (FDR = 0.01). Identified protein classes included keratins, keratin-associated proteins, histone proteins and desmosomes, inter alia. No protein by quantitative proteomic analyses significantly differentiated racial or geometric groups in our cohort. Functional pathway analysis of top-ranking proteins showed enrichment for skin, epidermal and tissue development, as well as intermediate-filament organization. Racial classification is a social construct, and attributing differences in a biologic endpoint to it is both imprecise and valueless in the era of precision medicine. Nonetheless, clarity on the physiological hair proteome could serve as a foundation for using hair proteomics for disease biomarker and targeted therapy identification for precision medicine. For the first time, we established the physiological hair proteome of individuals in a culturally diverse cohort from Africa. Significance: For the first time we have been able to characterize the physiological human hair proteome in a culturally diverse South African cohort. We have also identified that proteomics differences were not observed in individual hair samples using our quantitative proteomics bioinformatics pipeline. This outcome supports a widely known notion that DNA sequence comparison often shows that people on each continent are not more genetically similar to one another than to people who come from other conti

关键词： 质量检验   市场监管   检验方式  

摘要： 随着我国经济的飞速发展,人们的生活质量有了根本性的提高,商品得到了极大的丰富但同时商品质量问题也变得尤为重要,商品质量关系到一个国家经济的发展与社会的繁荣稳定,计量器具的检验切实的关系到百姓的民生与安定,是国家维持市场经济繁荣与健康发展的重要方式,本文以此背景出发,探讨了当前计量器具制造与检验的意义与重要性,进而分析了当下开展产品生产质量监管的具体措施,希望能够给予读者一定的参考价值。

关键词： 公共卫生   医学检验科学   医学检验人员  

摘要： 目前我国新冠肺炎疫情防控形势逐步向好,但是境外输入防控形势依然严峻。由于传染源不明、传播途径难以彻底切断以及易感人群众多等因素,决定了新冠肺炎疫情可能长时间存在。因此,预防控制工作将是长期艰巨的任务,需要坚持应急处置和常态化防控相结合的原则,统筹推进疫情防控和经济社会发展。回顾过去,这次疫情防控中暴露出了我国医院检验科在公共卫生救治体系中的职责定位不明、临床实验室硬件建设薄弱、专家介入滞后等问题,本文反思了医院检验科在本次抗疫活动中存在的问题,并对此提出了一些建议,以期完善疫情后国家公共卫生体系建设下的检验科的建设。

关键词： 工业管道   定期检验   典型缺陷  

摘要： 工业管道广泛应用于化工生产中。根据工业管道定期检验时发现的变形、结构不合理、腐蚀、错边量超标、泄漏等典型缺陷,阐述宏观检验在定期检验中的作用,并对不同缺陷产生的原因进行分析,给出了相应的处理建议。

关键词： 血液生化临床检验   急慢性白血病   鉴别诊断   临床治疗  

摘要： 目的:研究分析血液生化临床检验在急慢性白血病鉴别诊断与临床治疗的指导作用。方法:选择我院2018年1月~2020年1月期间收治的急慢性白血病患者100例为本次研究观察对象,其中急性白血病患者54例,慢性白血病患者46例;另选择同时期于我院行健康体检者50例为对照组观察对象,均对其展开血液生化临床检验,观察急慢性白血病患者各项血清酶类及微量元素指标变化。结果:根据组间数据显示,与对照组正常体检者比较,急慢性白血病患者各项血清酶指标水平明显更高,经治疗后,患者血清酶指标ALP、LDH、GGT、HBDH水平降低,P<0.05,差异存在统计学意义。相较于对照组,急慢性白血病组患者治疗前各项微量元素指标含量均高于对照组,急慢性组患者经治疗后,较之治疗前血锌、血铬及血铜含量得到改善,P<0.05,差异存在统计学意义。结论:对临床急慢性白血病患者实施血液生化临床检验,可直观清晰观察患者机体中血清酶含量变化,为临床诊断与治疗提供依据。

关键词： 诊断   缺铁性贫血   血常规检验   巨幼贫  

摘要： 目的探析贫血患者临床诊断中血常规检验具备的作用。方法选取巨幼贫患者60例为A组,缺铁性贫血患者65例为B组,另选择同一时间在我院进行健康体检者50名为C组,收集并整理所有实验对象的基础信息,分别给予血常规检验,记录三组RBC、Hb、MCH、MCV、RBC/MCV、RDW水平,同时观察血常规检验A、B组患者的符合率、敏感度及特异度。结果 A组RBC、Hb、MCH、MCV、RBC/MCV、RDW与B、C组相比差异显著(P<0.05)。A、B组经过血常规检验的符合率、灵敏度及特异度相比差异无显著性(P>0.05)。结论血常规检验运用于贫血患者诊断中效果显著,同时还可鉴别不同类型贫血,为后续治疗方案的选择提供参考依据。

关键词： 临床微生物检验   抗菌药物应用管理   抗菌药物敏感性试验  

摘要： 抗菌药物的不合理应用导致细菌耐药日益严重,已经成为全球共同关注的热点问题。临床微生物学检验是抗菌药物合理应用的基础和保障,可为抗菌药物应用管理提供重要的技术支撑,对促进抗菌药物合理使用具有重要作用。该文总结评价临床微生物检验在感染性疾病诊断、抗菌药物合理应用、医院感染控制及医护人员培训中的具体作用和技术要求,为临床微生物检验在抗菌药物应用管理中发挥作用提供技术指导。