The segmented taper equation has great flexibility and is widely applied in exiting taper systems. The unconstrained least square regression (ULSR) was generally used to estimate parameters in previous applications of the segmented taper equations. The joint point parameters estimated with ULSR may fall outside the feasible region, which leads to the results of the segmented taper equation bein...

The responses of litter decomposition to nitrogen (N) and phosphorus (P) additions were examined in an old-growth tropical forest in southern China to test the following hypotheses: (1) N addition would decrease litter decomposition; (2) P addition would increase litter decomposition, and (3) P addition would mitigate the inhibitive effect of N addition. Two kinds of leaf litter, Schima superba...

4. Winslow CM, Solomon DH, Chassin MR, Kosecoff J, Merrick NJ, Brook RH. The appropriateness of carotid endarterectomy. N Engi JMed 1988;318:721-727. 5. Alexandrov AV, Bladin CF, Maggisano R, Norris JW. Measuring carotid stenosis: time for a reappraisal. Stroke. 1993;24:1292-1296. 6. Fox AJ. How to measure carotid stenosis. Radiology. 1993;186: 316-318. 7. Dion JE, Gates PC, Fox AJ, Barnett HJM...

Mitchell and his team of geologists and engineers began working on the shale challenge in 1981, trying different combinations of processes and technologies before ultimately succeeding in 1997 with the use of a “slick-water” frac that made Barnett Shale economical to develop and in turn changed the future of the US natural gas industry [7]. Continuing on Mitchell’s success progress followed a p...

Relative pollen productivity (RPP) is a key parameter for quantitative reconstruction of past vegetation cover. However, RPP estimates are rarely obtained in the subtropical and tropical regions. In this study, extended R-value (ERV) model was used to estimate major plant taxa evergreen broadleaved mixed forests middle China based on soil samples data from 23 sites. The best result with combina...

The reliability of estimates tropical lowland vegetation cover based on lacustrine pollen records has long been debated. Here, we assess the relative productivity (RPPs) obtained in Hainan island using surface assemblages from six reservoirs and Regional Estimates Vegetation Abundance Large Sites (REVEALS) model. resulting REVEALS are compared to observations coverin studied region percentages....

Bu çalışma, Ocak 2012- Aralık 2014 tarihleri arasında Güney Doğu Anadolu Bölgesinde yer alan yedi ilde (Adıyaman, Batman, Diyarbakır, Gaziantep, Kilis, Mardin ve Şanlıurfa) bulunan akarsu, baraj, göl, gölet sazlık olmak üzere toplam 169 tatlısu habitatında sülük faunasının belirlenmesi amacıyla yürütüldü. Sülük örnekleri habitatın özelliğine göre birim zaman, çerçeve (Sülük toplama çerçevesi) E...