|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Modeling height–diameter relationship for Populus euphratica in the Tarim riparian forest ecosystem, Northwest China显示文摘Modeling height–diameter relationships is an important component in estimating and predicting forest development under different forest management scenarios. In this paper, ten widely used candidate height–diameter models were fitted to tree height and diameter at breast height(DBH)data for Populus euphratica Oliv. within a 100 ha permanent plots at Arghan Village in the lower reaches of the Tarim River, Xinjiang Uyghur Autonomous Region of China. Data from 4781 trees were used and split randomly into two sets:75 % of the data were used to estimate model parameters(model calibration), and the remaining data(25 %) were reserved for model validation. All model performances were evaluated and compared by means of multiple model performance criteria such as asymptotic t-statistics of model parameters, standardized residuals against predicted height,root mean square error(RMSE), Akaike's informationcriterion(AIC), mean prediction error(ME) and mean absolute error(MAE). The estimated parameter a for model(6) was not statistically significant at a level of a = 0.05. RMSE and AIC test result for all models showed that exponential models(1),(2),(3) and(4) performed significantly better than others. All ten models had very small MEs and MAEs. Nearly all models underestimated tree heights except for model(6). Comparing the MEs and MAEs of models, model(1) produced smaller MEs(0.0059) and MAEs(1.3754) than other models. To assess the predictive performance of models, we also calculated MEs by dividing the model validation data set into 10-cm DBH classes. This suggested that all models were likely to create higher mean prediction errors for tree DBH classes[20 cm. However, no clear trend was found among models.Model(6) generated significantly smaller mean prediction errors across all tree DBH classes. Considering all the aforementioned criteria, model(1): TH ? 1:3 t a= e1 t b?eàc?DBHT and model(6): TH ? 1:3 t DBH2= ea t b?DBH t c ? DBH2T are recommended as suitable models for describing the height–diameter relationship of P. euphratica. The limitations of other models showing poor performance in predicting tree height are discussed. We provide explanations for these shortcomings. | Tayierjiang Aishan Umüt Halik Florian Betz Philipp Gartner Bernd Cyffka | 2016 | Journal of Forestry Research2016，27，4： | 9 |
| 2 | 肥胖Zucker大鼠肾脏血管紧张素Ⅱ2型受体及Mas受体共定位,且功能相互依赖显示文摘血管紧张素Ⅱ2型受体(angiotensinⅡtype 2receptor,AT_2R)与Mas受体(the receptor Mas,MasR)作用复杂,但均具有相似的前利钠作用,尤其是在肥胖/糖尿病大鼠肾脏中AT_2R表达及利钠作用增强。根据一些报道提示的这些受体之间的潜在正相互作用,研究者在肥胖大鼠中验证肾脏AT_2R及MasR生理上相互作用、相互依赖地刺激细胞信号转导及促进利钠作用的假设。 | Patel SN Ali Q Samuel P Steckelings UM Hussain T 赵狄 练桂丽 | 2017 | 中华高血压杂志2017，25，9： | 2 |
| 3 | Laparoscopic Nissen fundoplication with prosthetic hiatal chosurc reduces postoperative intrathoracic wrap herniation 显示文摘 | Granderath FA Schweiger UM Kamolz T | 2005 | Arch Surg2005，140，1： | 1 |
| 4 | Fabrication of LiMn2O4 thin films by sol-gel method for cathode materials of microbattery显示文摘 | PARK Y J KIM J G KIM M K CHUNG H T UM W S KIM M H KIM H G | 1998 | J Power Sources1998，76，： | 1 |
| 5 | Quality of life, surgical outcome, and patient satisfaction three years after laparoscopic nissen fundoplication 显示文摘 | Granderath FA Kamolz T Schweiger UM etal | 2002 | World J Surg2002，26，10： | 1 |
| 6 | The AT2 receptor-A matter of love and hate显示文摘 | Steckelings UM Kaschina E Unger T | 2005 | Peptides2005，26，： | 1 |
| 7 | Withaferin a sensitizes TRAIL- induced apoptosis through reactive oxygen species-mediated up-reg- ulation of death receptor 5 and downregnlation of c-FLIP显示文摘 | Lee T J Um H J Min D S | 2009 | Free Radic Biol Med2009，46，12： | 1 |
| 8 | Laparoseopie Nissen fundoplication with prosthetic hiatal closure re duces postoperative intrathoracic wrap herniation herniation: preliminary results of a prospective randomized functional and clinical study 显示文摘 | Granderath FA Schweiger UM Kamolz T | 2005 | Arch Surg2005，140，1： | 1 |
| 9 | Angiotensin in the kidney:a key to understanding hypertension显示文摘 | Steckelings UM Rettig R Unger T | 2007 | Cell Metab2007，5，1： | 1 |
| 10 | A comparison of regional myocardial velocity information derived by pulsed and colour Doppler techniques:an in vitro and in vivo study显示文摘 | Kukulski T Voigt JU Wilkenshoff UM | | Echocardiography0，，： | 1 |
| 11 | Prevalence and distribution of human papillomavirus infection in Korean women as determined by restriction fragment mass polymorphism assay显示文摘 | LEE E H UM T H CHI H S | 2012 | J krean med sci2012，27，9： | 1 |
| 12 | Polymorphism of the angiotensin-converting enzyme gene in patients with cerebral infarction in Koreans显示文摘 | Um J Y Kim H J Choi T J | 2001 | J Mol Neurosci2001，17，3： | 1 |
| 13 | The AT2 receptor: amatter of love andhate显示文摘 | Steckelings UM Kaschina E Unger T | 2005 | Peptides2005，26，： | 1 |
| 14 | Hyperuricemia induces endothelial dysfunction显示文摘 | Khosla UM Zharikov S Finch JL Nakagawa T Roncal C Mu W | 2005 | Kidney Iut2005，67，： | 1 |
| 15 | Long-teml efficacy of pel- vic floor reeducation with EMG-controlled biofeedback 显示文摘 | Jundt K Peschers UM Dimpfl T | 2002 | Eur J Obstet Gyneeol Reprod Bid2002，105，2： | 1 |
| 16 | Candidate gene association study of magnetic resonance imaging-based hip osteoarthritis(OA) :evidence for COL9A2 gene as a com- mon predisposing factor for hip OA and lumbar discde- generation显示文摘 | Ngtkki A Videman T Kujala UM | 2011 | J Rheumatol2011，38，4： | 1 |
| 17 | Is laparoseopie refundoplication feasible in patients with failed primary open antireflux surgery显示文摘 | Granderath FA Kamolz T Schweiger UM | 2002 | Surg Endosc2002，16，3： | 1 |
| 18 | Practical guidance for homing missiles with bearings-only measurements显示文摘 | Um T Y | 1996 | IEEE Transaction on Aerospace and Electronic Systems1996，32，1： | 1 |
| 19 | Practical guidance for homing missiles with bearings-only measurements显示文摘 | Song T L Um T Y | 1996 | IEEE Transaction on Aerospace and Electronic Systems1996，32，1： | 1 |
| 20 | CLOS + IRTH composite guidance 显示文摘 | Song T L Um T Y | 1997 | IEEE Transactions on Aerospace and Electronic Sys- terns1997，33，4： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员