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| 1 | Mapping tree canopies in urban environments using airborne laser scanning (ALS):a Vancouver case study显示文摘Background: The distribution of forest vegetation within urban environments is critically important as it influences urban environmental conditions and the energy exchange through the absorption of solar radiation and modulation of evapotranspiration. It also plays an important role filtering urban water systems and reducing storm water runoff.Methods: We investigate the capacity of ALS data to individually detect, map and characterize large(taller than15 m) trees within the City of Vancouver. Large trees are critical for the function and character of Vancouver's urban forest. We used an object-based approach for individual tree detection and segmentation to determine tree locations(position of the stem), to delineate the shape of the crowns and to categorize the latter either as coniferous or deciduous.Results: Results indicate a detection rate of 76.6% for trees > 15 m with a positioning error of 2.11 m(stem location). Extracted tree heights possessed a RMSE of 2.60 m and a bias of-1.87 m, whereas crown diameter was derived with a RMSE of 3.85 m and a bias of-2.06 m. Missed trees are principally a result of undetected treetops occurring in dense, overlapping canopies with more accurate detection and delineation of trees in open areas.Conclusion: By identifying key structural trees across Vancouver's urban forests, we can better understand their role in providing ecosystem goods and services for city residents. | Giona Matasci Nicholas C.Coops David A.R.Williams Nick Page | 2018 | Forest Ecosystems2018，5，4： | 2 |
| 2 | Thrombocythenia and polycythemia in patients younger than 20 years at diagnosis:clinical and biologic features,treatment,and long-term outcome显示文摘 | Giona F Teofili L Moleti ML | 2012 | {H}Blood2012，，10： | 1 |
| 3 | Vesical leiomyoma显示文摘 | Cocimano V Giona C | 1982 | Minerva Urol1982，34，3： | 1 |
| 4 | Influence of pore-network topology on t he reaction diffusion kinetics in porous pellets显示文摘 | GIONA M MARRELLI L | 1992 | Chem Eng Sci1992，47，： | 1 |
| 5 | Modified model for the regulation of the tryptophan operon in Escherichia eoli显示文摘 | Giona M Adrover A | 2002 | Biotechnol Bioeng2002，80，3： | 1 |
| 6 | Hereditary thrombocytosis caused by MPLSer505Asn is associated with a high thrombotic risk,splenomegaly and progression to bone marrow fibrosis显示文摘 | Teofili L Giona F Torti L | | 0，，01： | 1 |
| 7 | Markers of myeloproliferative diseases in childhood polycythemia vera and essential thrombocythemia J显示文摘 | Teofili L Giona F Martini M | | 0，，09： | 1 |
| 8 | CODOX - M/IVAC ( NCI 89 - C -41 ) in children and adolescents with Burkitt's leukemia/lymphoma and large B - cell lymphomas : A 15 - year monocentric experience 显示文摘 | Moleti ML Testi AM Giona F | 2007 | Leuk Lymphoma2007，48，3： | 1 |
| 9 | Fractional diffusion equation for transport phenomena in random media显示文摘 | Giona M Roman H E | 1992 | Physica A1992，185，3： | 1 |
| 10 | The revised WHO diagnostic criteria for Ph-negative myeloproliferative diseases are not appropriate for the diagnostic screening of childhood polycythemia vera and essential thrombocythemia显示文摘 | Teofili L Giona F Martini M | 2007 | {H}Blood2007，，09： | 1 |
| 11 | Hereditary thrombocytosis caused by MPLSer505Asn is associated with a high thrombotic risk, splenomegaly and progression to bone marrow fibrosis 显示文摘 | Teofili L Giona F Torti L | 2010 | Haematologica2010，95，1： | 1 |
| 12 | Fractional diffusion equation for transport phenomena in random media显示文摘 | Giona M Roman H E | 1992 | Phys A1992，185，： | 1 |
| 13 | Stress-induced diffusion of hydrogen in metallic membranes:cylindrical vs planar formulation显示文摘 | Adrover A Giona M Capobianco L | 2003 | J Alloys and Compounds2003，358，： | 1 |
| 14 | Fractional diffusion equation for transport phenomena in random media显示文摘 | Giona M Roman H E | 1992 | Physica A1992，185，： | 1 |
| 15 | Langerhans' cell histiocytosis in adults: a clinical and therapeutic analysis of 11 patients from a single institution 显示文摘 | Giona F Caruso R Testi A M | 1997 | Cancer1997，80，9： | 1 |
| 16 | Feasibility, efficiency and transportability of short, horizon optimal mixing proto- cols显示文摘 | Cortelezzi L Adrover A Giona M | 2008 | J Fluid Mech2008，597，： | 1 |
| 17 | The geometry of mixing in 2-D time-periodic chaotic flows 显示文摘 | Giona M Adrover A Muzzio F J | 2000 | Chem Eng Sci2000，55，： | 1 |
| 18 | Self-similar spatio-temporal structure of intermaterial boundaries in chaotic flows显示文摘 | Alverez M M Muzzio F J Cerbili S Adrover A Giona M | 1998 | Physics Review Letters1998，81，： | 1 |
| 19 | Fractional diffusion equation for transport phenomena in random media显示文摘 | GIONA M POMAN H E | 1992 | PhysicaA1992，185，： | 1 |
| 20 | On the mechanism of fast oxygen storage and release in ceria-zirconia model catalysts显示文摘 | BOARO M GIORDANO F RECCHIA S SANTO V D GIONA M TROVARELLIL A | 2004 | Applied Catalysis B2004，52，3： | 1 |
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