期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
节能型高恢复性钢筋混凝土柱的抗震性能与评估方法 被引量:6
1
作者 孙玉平 赵世春 赵华 《土木工程学报》 EI CSCD 北大核心 2013年第5期105-110,共6页
通过对6根不同剪跨比和不同钢筋屈服应力的钢筋混凝土柱进行一定轴压下的水平反复加载试验,研究采用大量粉煤灰制成的混凝土柱的抗震性能,分析钢筋表面形状和屈服应力对柱子抗震性能的影响程度,提出可考虑钢筋滑动效应的滞回曲线分析方... 通过对6根不同剪跨比和不同钢筋屈服应力的钢筋混凝土柱进行一定轴压下的水平反复加载试验,研究采用大量粉煤灰制成的混凝土柱的抗震性能,分析钢筋表面形状和屈服应力对柱子抗震性能的影响程度,提出可考虑钢筋滑动效应的滞回曲线分析方法。试验结果表明,采用粉煤灰和超高强螺纹钢筋能够保证柱子在较高轴压下具有非常稳定的抗震响应,并能够极大减小柱子的残留变形,是实现节能型高恢复性钢筋混凝土结构的简单有效方法。与试验结果的对比表明,所提出的分析方法可精确评估高恢复性混凝土柱的滞回性能。 展开更多
关键词 节能型结构 高恢复性 螺纹超强钢筋 粉煤灰 滞回曲线
下载PDF
Tolerance of a Restorer Line R1056 to High Temperature and Its Application in Rice Breeding 被引量:2
2
作者 万丙良 査中萍 +4 位作者 殷得所 李进波 杜雪树 夏明元 戚华雄 《Agricultural Science & Technology》 CAS 2015年第12期2618-2623,共6页
The tolerance of a restorer line R1056 of rice and its hybrid combinations to high temperature at flowering stage was evaluated by sowing them at three dif- ferent dates and transplanting them into a greenhouse equipp... The tolerance of a restorer line R1056 of rice and its hybrid combinations to high temperature at flowering stage was evaluated by sowing them at three dif- ferent dates and transplanting them into a greenhouse equipped with heating system at flowering stage. Several important agronomic traits of these rice varieties or combinations were also measured. The results revealed that treated by high temper- ature (38 ℃) at flowering stage, the seed setting rate (70.4%), percentage of dehis- cent anthers (75.5%), and pollen number per floret (78) of R1056 were close to those of N22, which is tolerant to high temperature, and significantly higher than those of the rice varieties sensitive to high temperature. The seed setting rate, per- centage of dehiscent anthers, and pollen number per floret of the hybrid combina- tions generated from R1056 were smaller than those of R1056, but higher than those of the rice varieties sensitive to high temperature. R1056 had excellent agro- nomic traits, and good combining ability, and its hybrid combinations had low plant height, numerous panicles and high yield, suggesting that R1056 is not only an ex- cellent rice variety with tolerance to high temperature, but also an excellent restorer in three-line hybrid rice breeding. 展开更多
关键词 RICE High temperature TOLERANCE RESTORER
下载PDF
Robustness properties of dimensionality reduction with Gaussian random matrices
3
作者 HAN Bin XU ZhiQiang 《Science China Mathematics》 SCIE CSCD 2017年第10期1753-1778,共26页
In this paper, motivated by the results in compressive phase retrieval, we study the robustness properties of dimensionality reduction with Gaussian random matrices having arbitrarily erased rows. We first study the r... In this paper, motivated by the results in compressive phase retrieval, we study the robustness properties of dimensionality reduction with Gaussian random matrices having arbitrarily erased rows. We first study the robustness property against erasure for the almost norm preservation property of Gaussian random matrices by obtaining the optimal estimate of the erasure ratio for a small given norm distortion rate. As a consequence, we establish the robustness property of Johnson-Lindenstrauss lemma and the robustness property of restricted isometry property with corruption for Gaussian random matrices. Secondly, we obtain a sharp estimate for the optimal lower and upper bounds of norm distortion rates of Gaussian random matrices under a given erasure ratio. This allows us to establish the strong restricted isometry property with the almost optimal restricted isometry property(RIP) constants, which plays a central role in the study of phaseless compressed sensing. As a byproduct of our results, we also establish the robustness property of Gaussian random finite frames under erasure. 展开更多
关键词 phase retrieval finite frames sparse approximation restricted isometry property Johnson-Lindenstrauss lemma
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部