The present paper deals with thermoelastic problems of finitely long hollow cylinder com-posed of two different materials with axial sym- metry. The medium is t
猕猴桃因其营养丰富,酸甜可口,健胃消食,在栽培中,其适应性强,产量高,倍受人们的喜爱,通过实践,总结出了一套猕猴桃栽培管理技术,供指导生产实践。
介绍了运用数理统计方法绘制^-X-R控制图,找出内在的规律性,运用控制图及时调节BaCl2溶液加入量,提高SO4^2-指标的合格率达到100%。
This study assessed the spatial distribution pa- ttern of soft-sediment polychaetes on the near-shore of Admiralty Bay, King George Island, Antarctica. In the e
In living cells, proteins are dynamically connec ted through biochemical reactions, so its functi onal features are properly encoded into protein protein intera
建立了超高压电镜三维图像重构的方法与系统,首次在2MV加速电压下进行了从获得二维电镜像到三维重构尝试。通过图像校下在敢单轴放置试样夹中因试样高度变化引起的放大倍数和像转
简要阐述了水合肼分析中误差产生的原因及其与溶液的酸碱性、指示剂等的关系。采取了控制溶液pH值、过滤等措施后,测定终点显色鲜明,测定结果更加准确。
计算机应用于资料室,不仅仅是将手工操作转换为计算机操作,更主要的是它将信息服务推向了一个新阶段,加速了网络化进程,特别是顺应了读者对文献检索'快、准、高、广'
Synthesis of two lignin derivatives, lignophenol and lignin-aminophenol, were presented in this article. The chemical structure and the func-tional groups of li
It is considered three phases of development of a tropical cyclone: the origin, the steady-state regime and the termination, coinciding with three phases of sel