scholarly journals Bin mapping‐based QTL analyses using three genetic populations derived from indica – japonica crosses uncover multiple grain shape heterosis‐related loci in rice

2021 ◽  
Author(s):  
Xiaoxiao Deng ◽  
Weilong Kong ◽  
Tong Sun ◽  
Chenhao Zhang ◽  
Hua Zhong ◽  
...  
Keyword(s):  
Grain Shape ◽  
Bin Mapping

Mapping of QTLs for Grain Shape Using Chromosome Single Segment Substitution Lines in Rice (Oryza sativaL.)

2013 ◽  
Vol 39 (4) ◽  
pp. 617
Author(s):  
Jun WANG ◽  
Jin-Yan ZHU ◽  
Yong ZHOU ◽  
Jie YANG ◽  
Fang-Jun FAN ◽  
...  
Keyword(s):  
Grain Shape ◽  
Substitution Lines ◽  
Single Segment ◽  
Single Segment Substitution Lines ◽  
Segment Substitution

Progress in Genetic Research into Grain Shape in Rice

2011 ◽  
Vol 46 (6) ◽  
pp. 597-605
Author(s):  
Gong Lihui ◽  
Gao Zhenyu ◽  
Ma Bojun ◽  
Qian Qian
Keyword(s):  
Grain Shape ◽  
Genetic Research

A Multiscale Microfacet Model Based on Inverse Bin Mapping

2021 ◽  
Vol 40 (2) ◽  
pp. 103-113
Author(s):  
Asen Atanasov ◽  
Alexander Wilkie ◽  
Vladimir Koylazov ◽  
Jaroslav Křivánek
Keyword(s):  
Model Based ◽  
Bin Mapping

scholarly journals Review of the relationship between aggregates geology and Los Angeles and micro-Deval tests

2021 ◽  
Vol 80 (3) ◽  
pp. 1963-1980
Author(s):  
Solomon Adomako ◽  
Christian John Engelsen ◽  
Rein Terje Thorstensen ◽  
Diego Maria Barbieri
Keyword(s):  
Los Angeles ◽  
Crystal Size ◽  
Grain Shape ◽  
Mechanical Performance ◽  
Pore Space ◽  
Construction Material ◽  
Engineering Properties ◽  
Coarse Grained ◽  
The Impact ◽  
The Relationship

AbstractRock aggregates constitute the enormous volume of inert construction material used around the globe. The petrologic description as igneous, sedimentary, and metamorphic types establishes the intrinsic formation pattern of the parent rock. The engineering properties of these rocks vary due to the differences in the transformation process (e.g. hydrothermal deposits) and weathering effect. The two most common mechanical tests used to investigate the performance of aggregates are the Los Angeles (LA) and micro-Deval (MD) tests. This study reviewed the geological parameters (including mineralogy, grain and crystal size, grain shape, and porosity) and the relationship to Los Angeles and micro-Deval tests. It was found that high content of primary minerals in rocks (e.g. quartz and feldspar) is a significant parameter for performance evaluation. Traces of secondary and accessory minerals also affect the performance of rocks, although in many cases it is based on the percentage. Furthermore, some studies showed that the effect of mineralogic composition on mechanical strength is not sufficient to draw final conclusions of mechanical performance; therefore, the impact of other textural characteristics should be considered. The disposition of grain size and crystal size (e.g. as result of lithification) showed that rocks composed of fine-grain textural composition of ≤ 1 mm enhanced fragmentation and wear resistance than medium and coarse grained (≥ 1 mm). The effect of grain shape was based on convex and concave shapes and flat and elongated apexes of tested samples. The equidimensional form descriptor of rocks somehow improved resistance to impact from LA than highly flat and elongated particles. Lastly, the distribution of pore space investigated by means of the saturation method mostly showed moderate (R = 0.50) to strong (R = 0.90) and positive correlations to LA and MD tests.

Statistical Assessment of the Effects of Grain-Structure Representation and Micro-Properties on the Behavior of Bonded Block Models for Brittle Rock Damage Prediction

2021 ◽  
Vol 13 (14) ◽  
pp. 7889
Author(s):  
Carlos Efrain Contreras Inga ◽  
Gabriel Walton ◽  
Elizabeth Holley
Keyword(s):  
Grain Size ◽  
Grain Shape ◽  
Grain Structure ◽  
Minor Effect ◽  
Unique Contribution ◽  
Structure Generation ◽  
Structure Representation ◽  
The Real ◽  
Study Results ◽  
Block Models

The ability to predict the mechanical behavior of brittle rocks using bonded block models (BBM) depends on the accuracy of the geometrical representation of the grain-structure and the applied micro-properties. This paper evaluates the capabilities of BBMs for predictive purposes using an approach that employs published micro-properties in combination with a Voronoi BBM that properly approximates the real rock grain-structure. The Wausau granite, with Unconfined Compressive Strength (UCS) of 226 MPa and average grain diameter of 2 mm, is used to evaluate the effectiveness of the predictive approach. Four published sets of micro-properties calibrated for granites with similar mineralogy to the Wausau granite are used for the assessment. The effect of grain-structure representation in Voronoi BBMs is analyzed, considering grain shape, grain size and mineral arrangement. A unique contribution of this work is the explicit consideration of the effect of stochastic grain-structure generation on the obtained results. The study results show that the macro-properties of a rock can be closely replicated using the proposed approach. When using this approach, the micro-properties have a greater impact on the realism of the predictions than the specific grain-structure representation. The grain shape and grain size representations have a minor effect on the predictions for cases that do not deviate substantially from the real average grain geometry. However, the stochastic effect introduced by the use of randomly-generated Voronoi grain-structures can be significant, and this effect should be considered in future studies.

scholarly journals The Rules for the Lattice Rotation Accompanying Slip as Derived From a Self-Consistent Model

1999 ◽  
Vol 31 (4) ◽  
pp. 217-230 ◽  
Author(s):  
R. A. Lebensohn ◽  
T. Leffers
Keyword(s):  
Solid Mechanics ◽  
Grain Shape ◽  
Rolling Plane ◽  
Lattice Rotation ◽  
Consistent Model ◽  
Plane Strain Deformation ◽  
Self Consistent ◽  
The One ◽  
Equiaxed Grains ◽  
Very High

The rules for the lattice rotation during rolling (plane strain) deformation of fcc polycrystals are studied with a viscoplastic self-consistent model. Very high values of the ratesensitivity exponent are used in order to establish Sachs-type conditions with large local deviations from the macroscopic strain. The lattice rotation depends on the grain shape. For equiaxed grains the lattice rotation follows the MA rule, which is the one normally used in solid mechanics. For elongated and flat grains the lattice rotation follows a different rule, the PSA rule. In the standard version the model performs a transition from MA to PSA with increasing strain. There is avery clear difference between the textures resulting from the two different rules. MA leads to a copper-type texture, and PSA leads to a brass-type texture.

Dissecting the Genetic Basis of Extremely Large Grain Shape in Rice Cultivar ‘JZ1560’

2012 ◽  
Vol 39 (7) ◽  
pp. 325-333 ◽  
Author(s):  
Jie-Zheng Ying ◽  
Ji-Ping Gao ◽  
Jun-Xiang Shan ◽  
Mei-Zhen Zhu ◽  
Min Shi ◽  
...  
Keyword(s):  
Genetic Basis ◽  
Grain Shape ◽  
Rice Cultivar
Sign in / Sign up

Export Citation Format

Share Document