|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 用多角度遥感观测和BRDF模型对植物状况诊断评估(英文)显示文摘用遥感技术进行植物评估可与光谱植被指数联系起来,如规一化差分植被指数NDVI。NDVI值的变化一般被认为是植被数量和密度的变化,但直接与植物生长状况有关的植物光谱特性也会导致光谱植被指数的变化。因此,低植被指数可能由于低密度或肥料不足二者之一或共同造成。这会限制植被指数作为监测手段的使用。二向反射分布函数BRDF模型把植物密度和光学特性区别对待,因而它有助于植物状况的客观评估。在这项研究中,我们测量了两个冬小麦冠层多角度光谱反射:一个氮肥充足,一个贫乏。这些测量随后用于BRDF的反演,来估计光学特性和植物密度。结果表明,同时获得这两种参数是可行的。因此,用BRDF和多角度遥感测量手段进行氮肥养料有关的植物状况诊断分析是可能的。结果也显示出这种方法中如反演和计算时间所带来的一些局限性。 | J.Qi P.J.Pinter T.R.Clarke B.A.Kimball M.S.Moran | 1997 | 遥感学报1997，1，S1： | 4 |
| 2 | Quantum entanglement and Bell inequalities in Heisenberg spin chains显示文摘 | X Wang X Yuan W Li J.Qi, S.Wang D.Shen | | 0，，： | 2 |
| 3 | Coordinating supply chains with sales rebate contracts and vendor- managed in- ventory显示文摘 | W.K.Wang J.Qi s.Y.s.Leung | | 0，，01： | 1 |
| 4 | Releasing the residual stress of C_(f)/SiC-GH3536 joint by designing an Ag-Cu-Ti+Sc_(2)(WO_(4))_(3) composite filler metal显示文摘Due to native character of thermal expansion coefficient(CTE)mismatch between C_(f)/SiC and GH3536,achieving high strength joint was a huge challenge for C_(f)/SiC-GH3536 joints.Herein,a composite filler metal of Ag-Cu-Ti+Sc_(2)(WO_(4))_(3) was developed to join C_(f)/SiC and GH3536.This work introduced Sc_(2)(WO_(4))_(3) to Ag-Cu-Ti system as a negative thermal expansion(NTE)reinforcing phase to release joint residual stress.Sc_(2)(WO_(4))_(3) was evenly distributed in the brazing seam and reacted with Ti to form Ti_(3)O_(5) reaction layer.The results of finite element analysis showed that the residual stress of the joints was effectively released by introducing Sc_(2)(WO_(4))_(3) reinforcing phase,and the mises stress was decreased from447 to 401 MPa.The maximum shear strength of the C_(f)/SiC-GH3536 joint brazed with Ag-Cu-Ti+6 vol%Sc_(2)(WO_(4))_(3) filler alloys was 64 MPa,which was about 2.6 times higher than that of Ag-Cu-Ti alloys.The results of this study provide a promising strategy for the introduction of new Sc_(2)(WO_(4))_(3) reinforcing phase in Ag-Cu-Ti system,and improve the reliability and feasibility of composite brazing alloy in brazing filed. | P.Wang X.Liu H.Wang J.Cao J.Qi J.Feng | 2022 | Journal of Materials Science & Technology2022，，13： | 1 |
| 5 | Underwriting by Commercial Banks:Incentive Conflicts,Scope Economics,and Project Quality显示文摘 | Kanatas G J.Qi | | 0，，30： | 1 |
| 6 | Integration of Lending and Underwirting:Implications of Scope Economics显示文摘 | Kanatas G J.Qi | | 0，，58： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员