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Vegetation fractional coverage change in a typical oasis region in Tarim River Watershed based on remote sensing

Journal of Arid Land 2013年第1期5卷 89-101页

作者： Fei ZHANG Tashpolat TIYIP JianLi DING Mamat SAWUT verner carl johnson NigaraTASHPOLAT DongWei GUI College of Resources and Environment Science Xinjiang University Urumqi 830046 China Key Laboratory of Oasis Ecology Xinjiang University Urumqi 830046 China Department of Physical and Environmental Sciences Colorado Mesa University Grand Junction Colorado 81501 USA Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China Cele National Station of Observation & Research for Desert-Grassland Ecosystem in Xinjiang Cele 848300 China

Vegetation fractional coverage （VFC） is an important index to describe and evaluate the ecological system. The vegetation index is widely used to monitor vegetation coverage in the field of remote sensing （RS）. In this paper, the author conducted a case study of the delta oasis of Weigan and Kuqa rivers, which is a typical saline area in the Tarim River Watershed. The current study was based on the TM/ETM＋ images of 1989, 2001, and 2006, and supported by Geographic Information System （GIS） spatial analysis, vegetation index, and dimidiate pixel model. In addition, VBSl （vegetation, bare soil and shadow indices） suitable for TM/ETM＋ irrlages, constructed with FCD （forest canopy density） model principle and put forward by ITTO （International Tropical Timber Organization）, was used, and it was applied to estimate the VFC. The estimation accuracy was later prow^n to be up to 83.52%. Further, the study analyzed and appraised the changes in vegetation patterns and revealed a pattern of spatial change in the vegetation coverage of the study area by producing the map of VFC levels in the delta oasis. Forest, grassland, and farmland were the three main land-use types with high and extremely-high coverage, and they played an important role in maintaining the vegetation. The forest area determined the changes of the coverage area, whereas the other two land types affected the directions of change. Therefore, planting trees, protecting grasslands, reclaiming farmlands, and controlling unused lands should be included in a long-term program because of their importance in keeping regional vegetation coverage. Finally, the dynamic variation of VFC in the study area was evaluated according to the quantity and spatial distribution rendered by plant cover diigital images to deeply analyze the reason behind the variation.

关键词： vegetation fractional coverage (VFC) VBSI (vegetation, bare soil and shadow indices) dimidiate pixel model delta oasis of Weigan and Kuqa rivers

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Using a modified PAP/RAC model and GIS-for mapping water erosion and causal risk factors:Case study of the Asfalou watershed,Morocco

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International Soil and Water Conservation Research 2022年第2期10卷 254-272页

作者： Jad Tahouri Abdelhamid Sadiki L'houcine Karrat verner carl johnson Ngai weng Chan Zhang Fei Hsiang Te Kung Departement des Sciences de la Terre Université Sidi Mohammed Ben AbdellahFaculté des Sciences Dhar MahrazLaboratoire de GeosciencesEnvironnement et Ressources Associées(LGERA)B.P.1796FèsAtlasMorocco International Association of Seismology and Physics of the Earth’s Interior(IASPEI) Japan Department of Physical and Environmental Sciences Colorado Mesa UniversityGrand JunctionCO81501USA School of Humanities University Sains Malaysia11800PenangMalaysia Resources and Environment Department Xinjiang UniversityUrumqi830046People's Republic of China Key Laboratory of Oasis Ecology Ministry of EducationXinjiang UniversityUrumqi830046People's Republic of China Key Laboratory of Xinjiang Wisdom City and Environment Modeling Urumqi830046People's Republic of China Departments of Earth Sciences The University of MemphisMemphisTN38152USA

Our work focuses on the assessment of trends,erosion states and causal risk factors for soil erosion of the Asfalou watershed through the use of the Priority Actions Program/Regional Activity Center(PAP/RAC).This qualitative study model for water erosion makes it possible to assess susceptibility and determine potential fragile areas in order to diagnose the state of soil *** adopted the PAP/RAC crossed matrices,the geographic information system(GIS)and remote sensing(RS)to develop the classical *** method is based on three main approaches:predictive,descriptive and *** soil types,slope length(LS)and climatic factors into our model,including rainfall erosivity(R),slope exposure,soil moisture index(SMI)and land surface temperature(LST),improved the reli-ability of our *** correlation analysis identified these factors that explain erosion states and the risk of soil *** coefficients of determination(R2)of the various erosive states resulting from the modified PAP/RAC approach explain respectively 98.30%,77%and 49.3%of the observed variability of the erosive *** factors provide information on the current state of soil degradation depending on the degree of influence of the different factors that control *** descriptive approach has shown that soil loss manifests itself in different forms,whether for sheet erosion(L)and ravines(C1)succes-sively affecting 79.95%and 17.84%of the *** integration approach identifies factors and areas requiring intervention to counter the effects of soil erosion in the Asfalou watershed effectively and sustainably.

关键词： Modified PAP/RAC Model GIS Water erosion Causative factors Soil erosion

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Gouty destruction of a patellar tendon reconstruction and novel revision reconstruction technique: A case report

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World Journal of Orthopedics 2024年第7期15卷 675-682页

作者： carl C Edge Jonathan Widmeyer Omar Protzuk Maya johnson Robert O’Connell Department of Orthopaedic Surgery Division of Sports MedicineVirginia Commonwealth University Health SystemRichmondVA 23298-0153United States Division of Sports Medicine OrthowestCarroltonGA 30117United States

BACKGROUND Gout is a disease characterized by hyperuricemia,and resultant deposition of uric acid crystals in *** typically manifested as intraarticular crystals or tophi,gout can also cause pathology at *** deposition within tendinous structures put them at risk for traumatic and degenerative ***,allografts can also be at risk of rupture in the setting of severe *** present the case of a 56-year-old female with severe gouty disease who sustained a re-rupture of a patellar tendon allograft *** SUMMARY A 56-year-old female presented to clinic after feeling her left knee pop and collapse beneath her while descending *** had a history of tophaceous gout and left patellar tendon rupture with reconstruction and multiple revisions over the course of 19 *** patient presented with pain and extensor lag.A magnetic resonance image demonstrated a ruptured patellar tendon allograft reconstruction and avulsion fracture at the tibial *** patient was treated with a novel intervention of Achilles allograft with bone block in a unique configuration with a dermal allograft incorporated into the *** was made non-weight bearing in the operative extremity in extension for the first four weeks postoperatively and was then progressed to active flexion over the course of eight *** twelve weeks,she was able to fully extend her operative knee and at five months she was resuming her normal activities and *** Failed patellar tendon reconstruction due to gouty infiltration is treated with dermal allograft augmented Achilles tendon reconstruction with bone block.

关键词： Gout Patella Reconstruction Dermal allograft Revision Case report

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Re-evaluating monazite as a record of metamorphic reactions

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Geoscience Frontiers 2022年第2期13卷 237-254页

作者： Kyle P.Larson Sudip Shrestha John M.Cottle carl Guilmette T.Alex johnson H.Daniel Gibson Félix Gervais Department of Earth Environmental and Geographic SciencesUniversity of British Columbia Okanagan3247 University WayKelownaBC V1V 1V7Canada Fipke Laboratory for Trace Element Research University of British Columbia Okanagan3247 University WayKelownaBC V1V 1V7Canada Department of Earth Science University of CaliforniaSanta BarbaraSanta BarbaraCA 93106-9630USA Géologie et Génie Géologique UniversitéLavalQuébec CityQuebecCanada Department of Earth Sciences Simon Fraser University8888 University DriveBurnabyBC V5A 1S6Canada Départment des Génies Civil Géologique et des MinesPolytechnique MontréalMontréalQC H3T 1J4Canada

This study presents a re-examination of historical specimens(DG136 and DG167)from the Monashee complex in the southeastern Canadian Cordillera that are critical to the current understanding of rare earth element(REE)distribution between garnet and monazite(and other accessory minerals)during ***-hundred and fifty-one new monazite petrochronology spot analyses on 29 different grains across two specimens outline detailed(re)crystallization *** element data collected from the same ablated volume,interpreted in the context of new phase equilibria modelling that includes monazite,xenotime and apatite,link ages to specific portions of the pressure-temperature(P-T)paths followed by the *** linkages are further informed by garnet Lu-Hf geochronology and xenotime *** clockwise P-T paths indicate prograde metamorphism was ongoing by ca.80 Ma in both *** structurally deeper specimen,DG136,records peak P-T conditions of~755-770℃and 8.8-10.4 kbar,interpreted to coincide with(re-)crystallization of low Y monazite at~75-70 ***-rim garnet isopleths from DG167 cross in the observed peak assemblage field at~680℃ and 9.3 *** conditions are interpreted to correspond with low Y monazite(re-)crystallisation at~65 *** specimens record decompression along their retrograde path coincident with high Y 70-55 Ma and 65-55 Ma monazite populations in DG136 and DG167,*** findings broadly agree with those initially reported~20 years ago and confirm early interpretations using trace elements in monazite as generally reliable markers of metamorphic *** phase equilibria modelling and in situ petrochronological analysis,however,provide additional insight into monazite behaviour during anatexis and the effects of potential trace element buffering by REE-bearing phases such as apatite.

关键词： Monazite petrochronology Phase equilibria modelling Geochronology P-T-t paths

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褪黑素合成酶基因转化烟草及转化植株抗氧化系统变化

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生物工程学报 2009年第7期25卷 1014-1021页

作者：王英娟贾敬芬步怀宇赵宇玮许耀 carl Hirschie johnson Jan Kolár 西北大学生命科学学院陕西省生物技术重点实验室西安710069 Department of Biology Box1812-BVanderbilt University Institute of Experimental Botany Academy of Sciences of the Czech Republic

通过根癌农杆菌(含植物表达载体YXu55)介导的转化技术,将褪黑素生物合成酶-芳烷基胺N-乙酰转移酶(Arylalkylamine N-acetyltransferase,AANAT)与羟基吲哚O-甲基转移酶(Hydroxyindole O-methyltransferase,HIOMT)基因导入到烟草(秦烟95)中。对所获得的庆大霉素抗性烟草株系进行Southern blotting和RT-PCR分子生物学检测,结果表明,AANAT-HIOMT基因已成功地整合到烟草基因组中,并且可以在mRNA水平上进行转录。用反相高效液相色谱法(RP-HPLC)测定转化株系的褪黑素含量表明,转AANAT-HIOMT基因烟草株系的褪黑素含量均明显高于pZP122(不含AANAT和HIOMT基因的空白质粒)转基因株系和未转基因的对照植株,证明AANAT-HIOMT基因在转基因植株中的表达增强了褪黑素的合成能力。对不同株系抗氧化系统的部分指标进行了测定,并与其亲本对照植株比较,发现AANAT-HIOMT基因在转基因植物中的表达引起超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性增加,谷胱甘肽(GSH)浓度以及总抗氧化能力升高,且没有引起膜脂质过氧化物丙二醛(MDA)的变化,说明转基因烟草抗氧化潜能得到提高。

关键词：烟草褪黑素褪黑素合成酶基因遗传转化抗氧化

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A Method of Soil Salinization Information Extraction with SVM Classification Based on ICA and Texture Features

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Agricultural Science & Technology 2011年第7期12卷 1046-1049,1074页

作者： ZHANG Fei TASHPOLAT Tiyip KUNG Hsiang-te DING Jian-li MAMAT.Sawut verner johnson HAN Gui-hong GUI Dong-wei College of Resources and Environment Science Xinjiang UniversityUrumqi 830046 Key Laboratory of Oasis Ecology Xinjiang UniversityUrumqi 830046 Department of Earth Sciences the University of MemphisMemphisTN 38152USA Graduate School of Xinjiang University Urumqi 830046 Department of Physical and Environmental Sciences Mesa State College in Grand Junction CO 81501USA Xinjiang Institute of Ecology and Geography Chinese Academy of SciencesUrumqi 830011 Cele National Station of Observation ＆ Research for Desert-Grassland Ecosystem in Xinjiang Cele 848300

Salt-affected soils classification using remotely sensed images is one of the most common applications in remote sensing,and many algorithms have been developed and applied for this purpose in the *** study takes the Delta Oasis of Weigan and Kuqa Rivers as a study area and discusses the prediction of soil salinization from ETM +Landsat *** reports the Support Vector Machine(SVM) classification method based on Independent Component Analysis(ICA) and Texture ***,the letter introduces the fundamental theory of SVM algorithm and ICA,and then incorporates ICA and texture *** classification result is compared with ICA-SVM classification,single data source SVM classification,maximum likelihood classification(MLC) and neural network classification qualitatively and *** result shows that this method can effectively solve the problem of low accuracy and fracture classification result in single data source *** has high spread ability toward higher array *** overall accuracy is 98.64%,which increases by10.2% compared with maximum likelihood classification,even increases by 12.94% compared with neural net classification,and thus acquires good ***,the classification method based on SVM and incorporating the ICA and texture features can be adapted to RS image classification and monitoring of soil salinization.

关键词： Independent component analysis(ICA) Texture features Support vector machine(SVM) Soil salinizaiton

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武汉市初中生吸烟及控烟干预教育需求研究

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中国公共卫生 2002年第4期18卷 487-488页

作者：王远虹李燕山建国郭倩龚洁 carl Anderson johnson Jim Chen 武汉市卫生防疫站 430022 Institute

近年来,健康教育需求方面的研究逐渐受到人们的重视[1].为了更好的开展符合中国初中生需求的控烟干预项目,有必要了解初中生对吸烟及烟草教育的需求状况,对实施中的控烟干预项目的认识和意愿等信息,为此,武汉市卫生防疫站和美国南加利... 详细信息

近年来,健康教育需求方面的研究逐渐受到人们的重视[1].为了更好的开展符合中国初中生需求的控烟干预项目,有必要了解初中生对吸烟及烟草教育的需求状况,对实施中的控烟干预项目的认识和意愿等信息,为此,武汉市卫生防疫站和美国南加利福利亚大学合作进行了此项研究.现将结果报道如下.

关键词：健康教育戒烟武汉市初中生吸烟控烟干预

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初中生对吸烟、烟草及控烟干预教育需求的城乡差异

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中国学校卫生 2002年第6期23卷 511-512页

作者：王远虹 carl Anderson johnson 李燕 Jim Chen 山建国郭倩龚洁湖北省武汉市卫生防疫站 430022 Institute for Health Promotion and Prevention Research University of Southern California

目的　分析武汉市初中生对吸烟行为及烟草知识教育的主观需求的城乡差异。方法　采取分层随机整群抽样方法 ,抽取 9所中学 4 71名学生 ,在控烟干预进行过程中收集学生提出的有关吸烟和烟草的问题进行定量分析。采用问卷调查 ,了解目标... 详细信息

目的　分析武汉市初中生对吸烟行为及烟草知识教育的主观需求的城乡差异。方法　采取分层随机整群抽样方法 ,抽取 9所中学 4 71名学生 ,在控烟干预进行过程中收集学生提出的有关吸烟和烟草的问题进行定量分析。采用问卷调查 ,了解目标人群对实施中的控烟干预计划的认识和意愿。结果　城市学生对有关烟草的知识、戒烟、被迫吸烟、烟瘾、吸烟与寿命的问题更感兴趣。农村学生对有关吸烟行为、如何与吸烟者相处的问题更感兴趣。结论　城市学生对烟草知识教育的需求大于农村学生 ,农村学生对吸烟行为教育的需求大于城市学生。

关键词：初中生吸烟烟草控烟健康教育

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武汉市私立学校中学生吸烟状况的初步分析

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中国学校卫生 2003年第3期24卷 214-215页

作者：张德新柳春红陈心广龚洁李燕 carl Andyson johnson 湖北省武汉市疾病预防控制中心 430022 美国南加州大学

目的　了解私立学校中学生的吸烟状况 ,为加强青少年吸烟行为的干预措施提供依据。方法　以美国南加州大学提供的“青少年控烟项目调查问卷”为基础 ,对武汉市 8所私立学校 1 30 7名中学生进行问卷调查。以尝试吸烟率、吸过一整支烟的... 详细信息

目的　了解私立学校中学生的吸烟状况 ,为加强青少年吸烟行为的干预措施提供依据。方法　以美国南加州大学提供的“青少年控烟项目调查问卷”为基础 ,对武汉市 8所私立学校 1 30 7名中学生进行问卷调查。以尝试吸烟率、吸过一整支烟的吸烟率、过去 30d吸烟率、吸过 1 0 0支烟吸烟率描述学生的吸烟行为。结果　中学生的初始吸烟年龄平均为 1 1 .2岁 ;尝试吸烟率为 54 .0 % ,吸过 1整支烟的比例为 2 2 .0 % ,过去 30d内吸烟率为 1 9.4 % ,吸烟 >1 0 0支的学生占 4 .4 % ;吸烟情况分析中 ,54 .1 %的学生是在好奇的情况下抽烟 ;吸烟来源中 ,46 .0 %的学生报告香烟是从朋友或同学那里得到的。结论　私立学校中学生的吸烟状况严重。

关键词：中小学生卫生保健服务吸烟学校,私立

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武汉市青少年吸烟影响因素的路径分析

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中国公共卫生 2006年第10期22卷 1171-1172页

作者：周敦金龚洁曾晶 Qian Guo 夏江 Ping Sun 柳春红 Chihping Chou carl Anderson johnson 湖北省武汉市疾病预防控制中心 430022 美国南加尼福利亚大学医学院疾病预防和健康促进研究所

目的研究青少年吸烟的危险因素及其对吸烟的影响。方法采用分层随机整群抽样的方法,从武汉市3个城区中抽取普通和职业高中的高一和高二学生共1 168人,1 077人完成了调查问卷。采用探索性因子分析和路径分析方法进行分析。结果过去30 d... 详细信息

目的研究青少年吸烟的危险因素及其对吸烟的影响。方法采用分层随机整群抽样的方法,从武汉市3个城区中抽取普通和职业高中的高一和高二学生共1 168人,1 077人完成了调查问卷。采用探索性因子分析和路径分析方法进行分析。结果过去30 d的吸烟率为10.3%,其中男生为21.0%,女生为1.8%,30 d平均吸烟量为91.3支。结果显示,影响青少年吸烟量的直接因素有4个:饮酒、社会规范、初始吸烟年龄和吸烟朋友数,其他因素都是通过这几个因素间接影响青少年吸烟量。影响吸烟的前4位因素标准回归系数估计值为饮酒(0.354 3)、朋友吸烟(0.305 0)、性别(0.182 0)、多动(0.127 5)。结论今后干预措施应着重考虑预防青少年饮酒、减少吸烟朋友数以及改变青少年对吸烟社会规范的认识,重点人群为男生和具有多动特质的儿童。

关键词：青少年吸烟量路径分析

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