2篇
您的检索式：作者名="GOUDA Shaban"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 基于JKR粘结模型的蚯蚓粪基质离散元法参数标定显示文摘为确定不同含水率下蚯蚓粪基质的多种参数,提出了通过测定基质含水率,预测休止角,通过休止角合理推测其他参数的思路,并提出了一种散体休止角测定方法。以休止角作为参照,基于JKR粘结模型,使用离散元参数标定的方法,从与蚯蚓粪基质颗粒有关的10个参数中,筛选出颗粒间静摩擦因数、颗粒间滚动摩擦因数和JKR表面能3个对休止角影响显著的参数,建立了休止角与这3个显著参数之间的二次多项式回归模型。试验结果表明,该模型可以根据休止角预测蚯蚓粪基质参数,根据预测得到的参数建立离散元模型,休止角仿真结果与实际试验结果较为接近,差异分别为1.53%和0.22%。同时测定了不同含水率下蚯蚓粪基质的休止角,建立了休止角与含水率之间的关系模型。研究结果可为其他类似散体物料休止角的测定提供参考,并提供了一种通过测定易于测定的参数(如含水率)来推导其他难测参数的思路。 | 罗帅 袁巧霞 GOUDA Shaban 杨龙元 | 2018 | 农业机械学报2018，49，4： | 51 |
| 2 | Sequence Stratigraphy and Rudist Facies Development of the Upper Barremian-Lower Cenomanian Platform, Northern Sinai, Egypt显示文摘The Lower Cretaceous sections in northern Sinai are composed of the Risan Aneiza(upper Barremian-middle Albian) and the Halal(middle Albian-lower Cenomanian) formations. The facies reflect subtle paleobathymetry from inner to outer ramp facies. The inner ramp facies are peritidal, protected to open marine lagoons, shoals and rudist biostrome facies. The inner ramp facies grade northward into outer ramp deposits. The upper Barremian-lower Cenomanian succession is subdivided into nine depositional sequences correlated with those recognized in the neighbouring Tethyan areas. These sequences are subdivided into 19 medium-scale sequences based on the facies evolution, the recorded hardgrounds and flooding surfaces, interpreted as the result of eustatic sea level changes and local tectonic activities of the early Syrian Arc rifting stage. Each sequence contains a lower retrogradational parasequence set that constituted the transgressive systems tracts and an upper progradational parasequence set that formed the highstand systems tracts. Nine rudist levels are recorded in the upper Barremian through lower Cenomanian succession at Gabal Raghawi. At Gabal Yelleg two rudist levels are found in the Albian. The rudist levels are associated with the highstand systems tract deposits because of the suitability of the trophic conditions in the rudist-dominated ramp. | Yasser SALAMA Michael GRAMMER Shaban SABER Soheir EL-SHAZLY Gouda ABDEL-GAWAD | 2018 | Acta Geologica Sinica(English Edition)2018，92，1： | 3 |
您所在的机构暂未开通此部分的功能，请联系管理员