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Optimizing the Global Digital Elevation Models(GDEMs) and accuracy of derived DEMs from GPS points for Iraq’s mountainous areas

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Geodesy and Geodynamics 2020年第5期11卷 338-349页

作者： Shazad Jamal Jalal Tajul Ariffin Musa Taher Hama Ameen Ami Hassan Md Din wan anom wan aris Jwan Mohammad Ebrahim Faculty of Built Environment and Surveying Universiti Teknologi Malaysia Johor Bahru 81310 Malaysia College of Engineering University of Sulaimani 46001 Sulaimani Iraq University of Arkansas at Little Rock Little Rock 72204 AR USA SALP Middle East Ltd. Company for Oil and Gas Pipeline Construction Erbil Iraq

Optimizing the combined horizontal and vertical accuracy of the well-known Global Digital Elevation Models(GDEMs) of various resolutions for each country and region especially in Iraq’s mountainous areas is still questionable. All the three GDEMs, approximately, have the same vertical accuracy with the Root Mean Square(RMSE) of ±7.3 m, ±7.6 m and ±6.5 m via 12 fixed Ground Control Points(GCPs) for the Advanced Land Observation Satellite Phased Array L-band Synthetic Aperture Radar(ALOS PALSAR 12.5 m), the Shuttle Radar Topographic Mission(SRTM 30 m) and the TerraSAR-X(the name of twin satellites) add-on for Digital Elevation Measurement(TanDEM-X 90 m) GDEMs respectively. Moreover, the percentage of outliers that are greater or smaller than ±10 m detection of the height extraction from both the ALOS PALSAR and SRTM Digital Elevation Models(DEMs) contains 16.7% and for TanDEM-X was 25%. In this paper,the special DEM is derived using 2123 handheld GPS points for Sulaymaniyah Governorate, Kurdistan region, Iraq. The height extraction by discarding the outliers of 58% gives the RMSE of ±8.0 m in the case of adding geoid heights(N) to the ellipsoidal heights(h) via the Earth Gravitational Model 2008(EGM2008)and ±5.6 m without adding N. It is expected that the derived DEMs will give more accurate results both horizontally and vertically in the mountainous areas when GPS observations are intensified. The horizontal accuracy is validated through extracting hierarchy stream types of the watershed map from the DEMs for higher than 100 pixels length. The ALOS PALSAR DEM extracted more numbers of stream orders than ***, based on the criteria of RMSE, outlier detection, and the number of extracted stream orders, the ALOS PALSER DEM is regarded as the optimal GDEM in comparison with the close accuracy of both the TanDEM-X and SRTM DEM.

关键词： EGM2008 PALSAR SRTM

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Influencing factors on the accuracy of local geoid model

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Geodesy and Geodynamics 2019年第6期10卷 439-445页

作者： Shazad Jamal Jalal Tajul Ariffin Musa Ami Hassan Md Din wan anom wan aris WenBin Shen Muhammad Faiz Pa’suya Faculty of Built Environment and Surveying Universiti Teknologi Malaysia(UTM)Johor Bahru81310Malaysia College of Engineering University of Sulaimanii46001SulaimaniIraq School of Geodesy and Geomatics Wuhan UniversityWuhan430079China Centre of Studies for Surveying Science&Geomatics Faculty of Architecture Planning&SurveyingUniversiti Teknologi MARAPerlis Branch Arau Campus02600ArauPerlisMalaysia

Different modification methods and software programs were developed to obtain accurate local geoid models in the past two *** quantitative effect of the main factors on the accuracy of local geoid modeling is still ambiguous and has not been clearly diagnosed *** study presents efforts to find the most influential factors on the accuracy of the local geoid model,as well as the amount of each factor’s effect *** methodology covers extracting the quantitative characteristics of 16 articles regarding local geoid models of different *** Statistical Package of Social Sciences(SPSS)software formulated a strong multiple regression model of correlation coefficient r = 0.999 with a high significance coefficient of determination R^2 = 0.997 and adjusted R^2 = 0,98 for the required effective ***,factor analysis is utilized to extract the dominant factors which include:accuracy of gravity data(40%),the density of gravity data(25%)(total gravity factors is 65%),the Digital Elevation Model(DEM)resolution(16%),the accuracy of GPS/leveling points(10%)and the area of the terrain of the country/state under the study(9%).These results of this study will assist in developing more accurate local geoid models.

关键词： Accuracy of local geoid model Multiple regression model Influence factors

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Human adenovirus(HAdV)infection in children with acute respiratory tract infections in Guangzhou,China,2010–2021:a molecular epidemiology study

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World Journal of Pediatrics 2022年第8期18卷 545-552页

作者： Yi Chen Tao Lin Chang‑Bing wang wan‑Li Liang Guang‑wan Lian Mark Zanin Sook‑San Wong Xin‑Gui Tian Jia‑Yu Zhong Ying‑Ying Zhang Jia‑Hui Xie Ling‑Ling Zheng Fei‑Yan Chen Run Dang Ming‑Qi Zhao Yi‑Yu Yang Rong Zhou Bing Zhu Center Laboratory Guangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangzhou 510120China State Key Laboratory of Respiratory Diseases Guangzhou Institute of Respiratory HealthGuangzhou Medical UniversityGuangzhouChina Intensive Care Unit Guangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangzhou 510120China Guangzhou Medical University Guangzhou 510120China

Background Human adenovirus(HAdV)infection can cause a variety of *** is a major pathogen of pediatric acute respiratory tract infections(aris)and can be life-threatening in younger *** described the epidemiology and subtypes shifting of HAdV among children with ARI in Guangzhou,*** We conducted a retrospective study of 161,079 children diagnosed with acute respiratory illness at the Guangzhou Women and Children’s Medical Center between 2010 and *** specimens were detected by real-time PCR and the hexon gene was used for phylogenetic *** Before the COVID-19 outbreak in Guangzhou,the annual frequency of adenovirus infection detected during this period ranged from 3.92%to 13.58%,with an epidemic peak every four to fve *** demonstrated a clear seasonal distribution,with the lowest positivity in March and peaking during summer(July or August)every year.A signifcant increase in HAdV cases was recorded for 2018 and 2019,which coincided with a shift in the dominant HAdV subtype from HAdV-3 to *** latter was associated with a more severe disease compared to *** average mortality proportion for children infected with HAdV from 2016 to 2019 was 0.38%but increased to 20%in severe *** COVID-19 emerged,HAdV cases dropped to 2.68%,suggesting that non-pharmaceutical interventions probably reduced the transmission of HAdV in the *** Our study provides the foundation for the understanding of the epidemiology of HAdV and its associated risks in children in Southern China.

关键词： Acute respiratory tract infection Children Human adenovirus Severe acute hepatitis Southern China

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敦煌盆地五墩凹陷中间沟组下段泥页岩地球化学特征及沉积模式

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煤田地质与勘探 2022年第12期50卷 114-130页

作者：邓伟杨涛樊生龙刘子锐万旭辉肖娟宜曹涛涛甘肃省地质调查院甘肃兰州730000 湖南科技大学地球科学与空间信息工程学院湖南湘潭411201

分析泥页岩形成的沉积环境对页岩气储层评价和甜点区优选具有重要意义。为深入探讨敦煌盆地五墩凹陷中间沟组下段富有机质泥页岩的形成环境和有机质聚集机制,以DY1井为研究对象,开展了总有机碳(TOC)含量、显微组成、碳同位素、主量元素... 详细信息

分析泥页岩形成的沉积环境对页岩气储层评价和甜点区优选具有重要意义。为深入探讨敦煌盆地五墩凹陷中间沟组下段富有机质泥页岩的形成环境和有机质聚集机制,以DY1井为研究对象,开展了总有机碳(TOC)含量、显微组成、碳同位素、主量元素、微量元素和稀土元素等测试。结果表明,五墩凹陷中间沟组下段岩性为灰黑色炭质泥页岩、粉砂质泥页岩夹薄煤层等,泥页岩具有较高的TOC含量,质量分数介于0.53%~25.25%,均值为8.18%,成熟度R_(ran)介于0.74%~1.21%。Mo含量、P/Ti值和有机质显微组成表明,中间沟组下段沉积水体具有较低的初级生产力,高丰度有机质主要来自于陆源高等植物,反映了研究区浅水三角洲–半深湖环境下泥页岩的古生产力不是有机质聚集的关键控制因素;V/(V+Ni)、Ce_(anom)、Th/U和U_(EF)-Mo_(EF)协变模式等揭示中间沟组下段泥页岩形成于缺氧环境;Sr/Cu、Rb/Sr和气候指数C等指标反映了温暖–半干旱的古气候条件;Sr/Ba、Ba/Ga、Ca/(Fe+Ca)和Al_(2)O_(3)/MgO等特征指示古水体为淡水–微咸水;Zr/Al、Rb/K和MnO含量等指标反映了沉积水体为浅水–半深水。依据DY1井沉积环境参数与有机质聚集的关系,建立了中间沟组下段富有机质泥页岩的沉积模式,自下至上经历2个旋回4种沉积模式,沉积水体由浅水三角洲–半深湖沉积–浅水三角洲–半深湖沉积演变,富有机质泥页岩形成于低初级生产力、高等植物陆源输入为主以及缺氧的半深湖环境,缺氧条件是中间沟组下段泥页岩有机质聚集保存的关键控制因素。该研究为敦煌盆地侏罗系页岩气成藏机理、资源潜力评价和有利区优选提供了理论支持。

关键词：元素地球化学有机质特征沉积环境中间沟组下段五墩凹陷

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乳头状肾细胞癌14例报告并文献复习

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中华泌尿外科杂志 2013年第2期34卷 96-100页

作者：王飞王建业万奔钟晨阳刘明朱刚张耀光金滨张亚群王建龙马宏贾宝明魏东卫生部北京医院泌尿外科 100730

目的分析不同分型乳头状肾细胞癌的特点、诊疗及预后，以期提高其诊治水平。方法回顾性分析2005年1月至2011年1月收治14例乳头状肾细胞癌患者的临床资料。男7例，女7例。年龄20～77岁。临床表现肉眼血尿3例，腰痛3例，腹部包块1例，无... 详细信息

目的分析不同分型乳头状肾细胞癌的特点、诊疗及预后，以期提高其诊治水平。方法回顾性分析2005年1月至2011年1月收治14例乳头状肾细胞癌患者的临床资料。男7例，女7例。年龄20～77岁。临床表现肉眼血尿3例，腰痛3例，腹部包块1例，无症状者7例。肿瘤最大径1．6～7．8cm，平均3．8cm。左肾5例，右肾9例。术前TNM分期：T1aN0M08例，T1bN0M02例，T1aN0M1、T2aN。M0T3aN0M0、T3aN1M0各1例。行根治性肾切除术6例，肾部分切除术8例。结果乳头状。肾细胞癌I型6例，细胞呈乳头状分布，嗜碱性，被覆单层柱状上皮细胞轴心，胞质少，嗜碱性，核级低。Ⅱ型8例，肿瘤细胞大，胞质丰富，嗜酸性，乳头表面被覆假复层柱状上皮细胞，核级高。组织学分级高分化2例，中分化12例。14例患者随访12～80个月。1例（I型）术后26个月出现双肺多发转移，给予IL一2治疗，34个月出现肝转移、骨转移，给予靶向治疗，病情稳定。1例（Ⅱ型）术后23个月出现颈部淋巴结转移伴胸、腹腔积液，且均找到癌细胞，口服舒尼替尼治疗，术后42个月死亡。其余患者均无瘤生存。结论乳头状肾细胞癌国内少见。手术是目前首选的治疗方式。早期局限性乳头状肾细胞癌术后预后较好。靶向治疗可能成为转移性乳头状肾细胞癌治疗的新方向。

关键词：癌乳头状癌肾细胞病理状态体征和症状治疗学预后

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