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| 1 | 基于人工神经网络的注水开发油藏产量预测显示文摘针对传统注水开发油藏产量预测方法存在的问题,提出了基于人工神经网络的预测模型,阐述了模拟工作流程,并进行了算例分析。提出了基于流体物理学和测量数据随机组合的特征提取方法,以提高模型的预测效果。优选贝叶斯正则化算法作为模型的训练算法,该算法一般耗时较长,但能对产油量、产气量、产水量等嘈杂数据集进行良好泛化。通过计算均方误差及决定系数、绘制误差分布直方图及模拟数据-验证数据交会图等方式进行模型评价。用90%的历史数据训练、验证、测试目标模型结构,然后用其余10%数据进行盲测。研究表明,提出的流体产量预测模型决定系数超过0.9,模拟结果与实际数据吻合程度高,输入信息少,计算成本低。 | NEGASH Berihun Mamo YAW Atta Dennis | 2020 | 石油勘探与开发2020，47，2： | 15 |
| 2 | Longevity of Juniperus procera seed lots under different storage conditions: implications for ex situ conservation in seed banks显示文摘Juniperus procera Endl. is economically important timber species, but its populations are extremely small and fragmented in its natural habitat, thus, calling for immediate ex situ conservation. Here we examined the effects of seed sources and storage temperature on the longevity of Juniperus procera seed lots through collection and preservation of seeds in seed banks. Seeds were collected from nine sites across the species natural distribution in Ethiopia and stored in four warehouses: modern cold room (5℃), mud house (15℃), concrete block house (17℃ or corrugated iron house (20℃) for 42 months. Every three months, a random sample of stored seeds were drawn and tested for germination. A highly significant variation (p < 0.01) in germination of stored seeds was observed among different storage environments, seed lots, and duration of storage. Over the storage period, seeds stored in the cold room had the highest mean percentage germination, followed by the mud house, corrugated house and blocket house. The cold room (41%) and the mud house (38%) maintained the same level of germination as the intitial germination of the seedlotds (42%). The variation in longevity of stored seeds was significnatly correlated with the initial germination of seed lots (r > 0.80; p < 0.01). Cold storage also resulted in enhancement of germination through its stratification effect that terminated the non-deepphysiological dormancy of juniper seeds. In conclusion, seed lots with good initial germination can be effectively stored in cold room (5℃) up to four years. In the absence of modern cold stores, mud houses can be used as a good alternative to store seeds at local level. | Negash Mamo Diriba Nigusie Mulualem Tigabu Demel Teketay Miftah Fekadu | 2011 | Journal of Forestry Research2011，22，3： | 5 |
| 3 | Influence of topographic aspect on floristic diversity, structure and treeline of afromontane cloud forests in the Bale Mountains,Ethiopia显示文摘We studied the influence of east and west aspects on floristic composition, diversity, structure and treeline of afromontane cloud forests at Rira in the Bale Mountains, southeast Ethiopia. In addition, we studied how aspect relates to and/or interacts with other topographic and edaphic factors in influencing vegetation diversity. Stratified systematic plot sampling was used to survey the floristic composition, diversity and structure of forests on east- and west-facing slopes. The sample plot size was 20 × 20 m and a total of 36 plots were inventoried. A total of 72 composite soil samples were collected and analysed.Woody species richness of the forest on the east-facing slope was 1.7 times higher than on the west-facing slope.Shannon, Simpson and Log-series alpha diversity indices and evenness of forests on the east-facing slope were significantly higher than on the west-facing slope. NMDS ordination indicated that the east- and west-facing slopes formed two clusters of species and aspect explained 55.2 % and 10.4 % of the variation in species richness and abundance, respectively. There was no significant difference between aspects in stand structure except in dominant height, which was higher on the east-facing slopes. There was significant interaction between aspect and elevation in influencing woody species diversity. The four plant community groups, which were identified using cluster and indicator species analysis were represented differently on the east and west aspects. The treeline on the east-facing slope(3352 m) was located about 110 m higher than on the west-facing slope(3240 m). Soil moisture deficiency was unlikely to be a limiting factor on either site. Near the equator, east–west aspect was shown to have considerable impact on floristic composition, diversity, structure, and treeline position of montane forests. Diurnal cloud movement patterns and its impact on microclimate of slope aspect should be taken into account in future studies of cloud forest diversity, structure, and treeline position. | Eshetu Yirdaw Mike Starr Mesele Negash Fantaw Yimer | 2015 | Journal of Forestry Research2015，26，4： | 4 |
| 4 | Innate Immune Tolerance and the Role of Kupffer Cells in Differential Responses to Interferon Therapy Among Patients with HCV Genotype 1 Infection显示文摘 | Daryl T.-Y. Lau Amina Negash Jie Chen Nanette Crochet Mala Sinha Yuhong Zhang Jeremie Guedj Sharon Holder Takeshi Saito Stanley M. Lemon Bruce A. Luxon Alan S. Perelson Michael Gale | 2012 | Gastroenterology2012，，： | 2 |
| 5 | Wavelet-based muhicarrier transmission over muhipath wireless channels显示文摘 | Negash B G Nikookar H | 2000 | Electron Lett2000，36，21： | 1 |
| 6 | IL-lbeta production through the NLRP3 inflammasome by hepatic macrophages links hepa- titis C virus infection with liver inflammation and disease 显示文摘 | Negash A A Ramos H J Crochet N | 2013 | PLoS Pathog2013，9，10： | 1 |
| 7 | Forensic 40 Ar/39 Ar dating : a provenance study of Middle Stone Age obsidian artifacts from Ethiopia显示文摘 | Vogel N Nomade S Negash A | 2006 | Journal of Archaeological Science2006，33，12： | 1 |
| 8 | Quality and effectiveness in Web-based customer support systems显示文摘 | Negash Ryan Igbaria | 2003 | Information & Management2003，40，8： | 1 |
| 9 | Mild cognitive impairment: an overview 显示文摘 | Petersen RC Negash S | 2008 | SNS Speter2008，13，1： | 1 |
| 10 | Synthesis of 4 - (3' - iodoanilino) - 6,7 - dialkoxyquinazolines: radiolabeled epidermal growth factor receptor tyrosine kinase inhibitors显示文摘 | Lira J K Negash K Hanraham S M | 2000 | Journal of labelled Compounds and Radiopharmaceuticals2000，43，12： | 1 |
| 11 | Subjective memory complaints, cognitive performance ,and psychological factors in healthy older adults 显示文摘 | Steinberg SI Negash S Sammel MD et aI | 2013 | Am J Alzheimers Dis Other Demen2013，28，8： | 1 |
| 12 | Mild cognitive impairment: an overview显示文摘 | Petersen RC Negash S | 2008 | CNS Spectrums2008，13，1： | 1 |
| 13 | Long-term effects of prenatal hy- poxia on endothelium-dependent relaxation responses in pulmona- ry arteries of adult sheep显示文摘 | Liu J Gao Y Negash S | 2009 | Am o1 Physiol Lung Ceil Mol Physiol2009，296，3： | 1 |
| 14 | Response of seedlings of two Eucalyptus and three deciduous tree species from Ethiopia to severe water stress显示文摘 | Gindaba J Rozanov A Negash L | 2004 | Forest Ecology and Management2004，201，： | 1 |
| 15 | Quality and Effectiveness in Web Based Customer Support Systems显示文摘 | Negash S Ryanb T Igbariab M | 2003 | Information & Management2003，40，8： | 1 |
| 16 | Mild cognitive impairment: an overview显示文摘 | Peterson RC Negash S | 2008 | CNS Spectr2008，13，1： | 1 |
| 17 | Mucosal application of cationic poly(D,L-lactide-co-glycolide)microparticles as carriers of DNA vaccine and adjuvants to protect chickens against infectious bursal disease显示文摘 | NEGASH T LIMAN M RAUTENSCHLEIN S | 2013 | Vaccine2013，31，36： | 1 |
| 18 | Mild cognitive impairment: an overview 显示文摘 | Petersen RC Negash S | 2008 | CNS Spectrums2008，13，1： | 1 |
| 19 | In vitro conservation of enset under slow-growth conditions 显示文摘 | Negash A Krens F Schaart J | 2001 | Plant Cell Tissue and Organ Culture2001，66，2： | 1 |
| 20 | Photosynthetic gas exchange,growth and biomass allocation of two eucalyptus and three in- digenous tree species of Ethiopia under moisture deficit显示文摘 | GINDABAA J ROZANOV A NEGASH L | 2005 | Forest Ecology and Management2005，205，： | 1 |
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