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A preliminary evaluation of throughfall sampling techniques in a mature coniferous forest

j.urnal of Forestry Research 2014年第2期25卷 407-413页

作者： Darryl. E. Carlyle-Moses Chad. E. Lishman adam. j. mckee Department of Geography & Environmental Studies Thompson Rivers University Graduate Program in Environmental Science Thompson Rivers University

Rainfall, throughfall and stemflow were measured and canopy interception loss was derived for 14 rainfall events from j.ne 22 to August 30, 2008 within a mature declining hybrid white spruce （Picea glauca （Moench） Voss x p engelmannii Parry ex Engelm.） - subalpine fir （Abies lasiocarpa （Hook.） Nutt.） - lodgepole pine （Pinus contorta vat. latifolia Dougl. ex Loud.） stand in south-central British Columbia, Can- ada. Stemflow was negligible during the study period, while, respectively throughfall and canopy interception loss accounted for approximately 59.4% and 40.6% of the 50.1 mm of cumulative rainfall. Throughfall variability was assessed with three approaches involving roving and stationary wedge-type gauges, and stationary trough gauges. Throughfall exhibited large spatial variability with the coefficient of variability of study period throughfall sampled using 16 stationary trough gauges being 30.3%, while it was 38.0% and 28.7% for 32 stationary and 32 roving wedge gauges, respectively. Our analysis suggests that a roving gauge method is better than a stationary approach since the errors associated with event mean throughfalls are summed quadratically and a greater portion of the canopy area is sampled. Trough gauges were more efficient than wedge gauges; however, this efficiency was less than expected given their much larger sampling areas, suggesting that spatial autocorrelation lengths of throughfall may be longer than the trough systems. The spatial distribution of throughfall showed a high degree of temporal persistence throughout the study suggesting the existence of stable ＂wet＂ and ＂dry＂ inputs to the floors of these coniferous forests.

关键词： throughfall canopy interception loss stemflow spatial variability temporal persistence

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Modelling stemflow production by j.venile lodgepole pine(Pinus contorta ***)trees

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j.urnal of Forestry Research 2017年第3期28卷 565-576页

作者： adam.j.mckee Darryl E.Carlyle-Moses Graduate Program in Environmental Science Thompson Rivers University900 McGill RoadKamloopsBC V2C 0C8Canada Department of Geography&Environmental Studies Thompson Rivers University900 McGill RoadKamloopsBC V2C 0C8Canada

Stemflow is a focused point source input of precipitation and nutrients at the base of a tree or plant and can have a significant impact on site hydrology. To date, no known studies have modelled stemflow production for j.venile lodgepole pine （Pinus contorta vat. latifolia）. Meteorological conditions, tree characteristics, and stemflow were sampled for two j.venile lodgepole pine stands over the course of the 2009 growing season. Step-wise multiple regression was used to assess which meteorological and tree architecture variables influenced stemflow production for each research plot. Once predictor variables were identified, models were produced for each stand and a generic model was produced that applied to both plots. A model employing precipitation depth and crown proj.ction area successfully explained 71.3% of the variation in stemflow production from sampled trees. Stemflow was found to represent 1.8% of the study period rainfall and, although not a large component of the plot-scale canopy water balance, it is an order of magnitude greater than the fractioning of stemflow from mature lodgepole and lodgepole pine dominated forest. Additionally, stemflow funnelling ratios were found to average 22.2 and 24.3 from the two sample plots over the study period with a single tree, single event maximum of 111.7 recorded for a tree with a 3.3 cm bole diameter and a rain depth of 17.4 mm.

关键词： Lodgepole pine Stemflow Stemflow funnelling ratio

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The impact of seasonality on multi-scale feature extraction techniques

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International j.urnal of Digital Earth 2020年第1期13卷 9-21页

作者： Brian Moore j.cob j.mckee Geographic Information Science and Technology Group Computational Sciences and Engineering DivisionOak Ridge National LaboratoryOak RidgeTNUSA

A key component in constructing a broad-scale,gridded population dataset is fine resolution geospatial data accurately depicting the extent of human *** datasets are often developed using a wide range of methods and classification techniques,including the use of spatial features,spectral features,or the coupling of both to identify the presence of man-made structures from high-resolution satellite *** using spatial and textural-based descriptors to generate highresolution settlement layers for two dissimilar regions at the peak of seasonal disparity,this study attempts to quantify the influence of seasonality on the accuracy of a supervised,multi-scale,feature extraction framework for automated delineation of human *** generated by numerous models are evaluated against a reference dataset allowing for assessment of seasonal and feature differences in the context of *** or regional mapping of human settlement requires the assemblage of high-resolution satellite images with variegated acquisition characteristics(season,sun elevation,off-nadir,etc.)to produce a cloud-free composite image from which features are *** of this study suggest an emphasis on imagery criteria,in particular acquisition date,could improve classification accuracy when mapping human settlement at scale.

关键词： Remote sensing highresolution imagery image processing human settlement accuracy

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Survey of advances and challenges in intelligent autonomy for distributed cyber-physical systems

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CAAI Transactions on Intelligence Technology 2018年第2期3卷 75-82页

作者： David W. mckee Stephen j. Clement j.ber Almutairi j.e Xu Faculty of Engineering School of Computing University of Leeds Leeds UK

With the evolution of the Internet of things and smart cities, a new trend of the Internet of simulation has emerged to utilise the technologies of cloud, edge, fog computing, and high-performance computing for design and analysis of complex cyber-physical systems using simulation. These technologies although being applied to the domains of big data and deep learning are not adequate to cope with the scale and complexity of emerging connected, smart, and autonomous systems. This study explores the existing state-of-the-art in automating, augmenting, and integrating systems across the domains of smart cities, autonomous vehicles, energy efficiency, smart manufacturing in Industry 4.0, and healthcare. This is expanded to look at existing computational infrastructure and how it can be used to support these applications. A detailed review is presented of advances in approaches providing and supporting intelligence as a service. Finally, some of the remaining challenges due to the explosion of data streams; issues of safety and security; and others related to big data, a model of reality, augmentation of systems, and computation are examined.

关键词：物联网人工智能智能技术发展现状

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Phosphorylated low-density lipoprotein receptor-related protein 6 is prevalent in hippocampal progenitor cells and circuits of aged human hippocampus

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Advances in Alzheimer's Disease 2013年第4期2卷 126-131页

作者： Christopher P. Sullivan Rosemary Elliott-Bryant Anish Kanesa-Thasan Ann C. mckee Richard E. Fine j.hn M. Wells Peter j. Morin Department of Biochemistry Boston University School of Medicine Boston USA Department of Neurology Boston University School of Medicine Boston USA Geriatric Research Education and Clinical Center Bedford VA Hospital Bedford USA

Wnt signaling has been implicated in Alzheimer’s disease (AD) pathogenesis, but no studies have described Wnt signaling in aging brain. Phosphorylation of the Wnt coreceptor, low-density lipoprotein receptor-related protein 6 (Lrp6), is a sensitive indicator of Wnt ligand-receptor interaction and canonical Wnt signaling. We report that in aged human temporal lobe, the phospho-Lrp6 (pLrp6) epitope localizes to neurons in the entorhinal cortex (EC), the dentate gyrus (DG), and the hippocampal formation, especially in the CA3 field. Activated Lrp6 is detected in neuronal soma and in neuronal processes, particularly in the mossy fiber terminals in the stratum lucidum of CA3. These three regions and their connectivity represent the afferent arm of the maj.r hippocampal circuit. In the DG, cells positive for pLrp6 include Type 1 and Type 2 hippocampal progenitor cells. Overall, these data indicate regional Wnt receptor activation in the human hippocampus that is most prominent in the cells comprising the afferent arm of the maj.r hippocampal circuit that is associated with learning and memory functions. These findings are consistent with data from rodent studies which suggest an important role for Wnts in adult neurogenesis in the human DG. We speculate that Wnt signaling may be an activity-dependent trophic influence in the hippocampus.

关键词： Wnt LRP6 Hippocampus CA3 Neurogenesis Alzheimer’s

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A NEW ELECTROMAGNETIC PROBE FOR SMALL CONCENTRATION CHANGE MEASUREMENTS IN AQUEOUS DIELECTRIC SOLUTIONS

A NEW ELECTROMAGNETIC PROBE FOR SMALL CONCENTRATION CHANGE M...

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2nd International Symposium on Recent Advances in Microwave Technology(ISRAMT’89)

作者： j.M.mckee P.F.Mastin B.P.j.hnson Microwave Applications Research Center Electrical Engineering/Computer Science Department University of Nevada Reno RenoNevada 89557

＜正＞There is a strong demand in industry for real time monitoring of chemical ***- tronic monitoring techniques have the advantage of a fast response time and good tolerance for high temperature and high pressure *** paper reports on the current status of an ongoing research proj.ct involving the design of a planar dielectric resonator based chemical species monitoring probe that can be made very small for localized sensing and will enable real time monitoring of concentration changes in a broad range of chemical reaction processes.

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火炬松根在不同水份和磷处理下的生长和生理<摘译>

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湖北林业科技 1986年第3期 45-47页

作者： D、S、DEBELL W、H、mckee,j.. D、D、HOOK j.L、ASKEW 涂平武

在排水(D)季节性积水(SF)和连续性积水(CF)土壤里,分别施磷和不施磷作对比,经过两年时间,观察火炬松根的重量、形态、淀粉含量、缺氧和氮代谢。在SF,根的生长最好;在CF,根的生长最差;在所有水份条件下,施磷对根的生长有促进作用。

关键词：季节性火炬松北美刺果松积水排水处理水份连续性

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Targeting the BDNF/TrkB Pathway in Poor Prognosis Neuroblastoma

Targeting the BDNF/TrkB Pathway in Poor Prognosis Neuroblast...

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中国抗癌协会第七届全国小儿肿瘤学术会议

作者： Carol j.Thiele j.rry j.boin Hideya Onish Amy mckee j.nnifer j.ckson Kelly Martin Cell & Molecular Biology Section Pediatric Oncology BranchCenter for Cancer ResearchNational Cancer InstituteNational Institutes of HealthBethesda HematologY Lab Second Affiliated HospitalChina Medical UniversityShenyangChina

Patients with Neuroblastoma (NB) whose tumors express high levels of Brain Derived Neurotrophic Factor (BDNF) and its tyrosine kinase receptor,TrkB,have a poor ***,tumors derived from these patients are chemoresistant,highly angiogenic and *** normal development BDNF stimulates cell survival, differentiation and function in normal neural cells via selective activation of the TrkB

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波长248mn的KrF准分子激光泵浦的染料激光器之特性

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应用激光 1980年第3期 1-5页

作者： T.j.mckee D.j.j.mes 邵子文加拿大Lumonics研究公司

本文报导了用商品 KrF 准分子激光器泵浦四种染料,从而得到关于染料激光器的转换效率和染料退化的特性。所用的四种染料为:对三联苯、BBQ、若丹明6G 和7-乙氨基-4-三氟甲基香豆素,其激光波长的最大值自340至580毫微米。测得在泵浦能量直... 详细信息

本文报导了用商品 KrF 准分子激光器泵浦四种染料,从而得到关于染料激光器的转换效率和染料退化的特性。所用的四种染料为:对三联苯、BBQ、若丹明6G 和7-乙氨基-4-三氟甲基香豆素,其激光波长的最大值自340至580毫微米。测得在泵浦能量直至160毫焦耳的范围内,转换效率为一常数.在波长248毫微米、平均功率为0.2瓦的泵浦光作用下测量染料退化的结果表明:对于流动系统中的125毫升染料溶液.其可用寿命超过20小时。

关键词：染料激光器准分子对三联苯转换效率液体激光器泵浦光 KrF 染料染剂准分子激光器二聚物激光器波长

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长江口邻近陆架210Pb的地球化学特征

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沉积学报 1985年第4期 31-44页

作者：钱江初,D.j.DeMaster,C.A.Nittrouer,B.A.mckee 国家海洋局第二海洋研究所美国北卡罗莱纳州立大学美国北卡罗莱纳州立大学美国北卡罗莱纳州立大学杭州

随着工业生产的不断发展,铅的使用量日益增加,由此铅对环境污染亦日趋严重。据研究,长江向东海排放铅的通量为0.072公斤/秒（其中溶解相为0.008公斤/秒,颗粒相为0.064公斤/秒）,每年排放总量可达二千二百吨之多。铅的放射性同位铅-210(... 详细信息

随着工业生产的不断发展,铅的使用量日益增加,由此铅对环境污染亦日趋严重。据研究,长江向东海排放铅的通量为0.072公斤/秒（其中溶解相为0.008公斤/秒,颗粒相为0.064公斤/秒）,每年排放总量可达二千二百吨之多。铅的放射性同位铅-210(下称210Pb),可作为很好的示踪剂来研究海洋环境中铅的地球化学行为,因而被人们所重视。另外,210Pb有较为合适的半衰期（22.3年）,因此成为研究近百年来海洋现代沉积作用过程及现代环境污染的重要工具。

关键词： Pb 沉积通量陆架地球化学特征长江口扬子江口

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