目的明确超级13Cr在超高温超临界CO2环境下的适用性、耐蚀性及腐蚀产物膜特征。方法采用高温高压反应釜模拟气井井底超高温超临界CO2腐蚀工况,采用腐蚀失重法获取腐蚀速率,结
Deposition of inorganic-organic nano-hybrid ultrathin films onto mesoporous silicate materials has been proven possible by using layer-by-layer assembly method.
我站在学校旁的崖畔上,守望着每一轮朝阳。 朝阳升起来了,雾气还没散尽,孩子们就从一条条小路上冒出来,他们背着妈妈或是姐姐缝制的书包,提着一小袋土豆奔学校来了。
Facile synthesis of 6(E)-geranylgeraniol-19-oic acid 1,a naturally occurring alicyclic diterpene acid,by a Horner-Wadsworth-Emmons olefination of two readily av
A new method for synthesis of 3-azido-3-deoxyxylofuranoside was described. D-ribose was methylated, then treated with methanesulfonyl chloride to give II. II wa
编程实验是"数字图像处理"课程教学的重要实践环节,为引导学生利用图像处理知识解决实际问题,给出了基于OpenCV的水下海参图像分割实验案例。依据自动化专业数字图像处理课程特点及在实验应用中存在的问题,提出基于OpenCV平台结合C++实验编程方式,对水下海参图像的目标分割进行设计。实验结果表明,能实现对海参目标快速准确分割。通过该实验设计,不仅使学生掌握了图像处理技术,也使学生的实践能力和创新能力
The structures of five metabolites (2-6) of agarofuran 1 were confirmed by synthesis. The configuration of the secondary hydroxyl in 7 was determined by Horeau
《九年义务教育全日制小学语文教学大纲(试用修订版)》(简称新大纲)关于阅读教学的要求有变化。一是减少头绪,加强综合。在理解内容方面,不再明确提出容易导致繁锁的内容分析
One new A - type proanthocyanidin trimer, lindetarmin trimer, was isolated from thestems of Lindera aggregata (Sims) Kosterm.. Its structure was elucidated by s