晶粒生长对铁磷酸盐玻璃陶瓷固化体化学稳定性的影响

铁磷酸盐玻璃陶瓷可用于固化高放核废物。通过改变原料粉末尺寸和热处理的升温速率来控制成核的均匀性和晶核的生长速度,研究了在独居石玻璃陶瓷固化体中晶粒生长对固化体化学稳定性的影响。结果表明：粉末尺寸越小,越有利于形成均匀的晶核,固化体的化学稳定性越好,当粉末粒度小于38μm时浸出率达到最低值;热处理的升温速率越慢,所形成的微晶尺寸越均匀,固化体的化学稳定性越好,当升温速率为1℃／min时,样品的浸出率最低。     

基于相关算法消除高重信号的时差定位模糊

总结了多种解决高重频雷达信号时差定位模糊方法的基础上,提出了一种由相关算法推导出的新方法。该方法首先运用直方图计算出高重频信号的不同参差频率和对应的模糊时差,并在此基础上进行时差组合,然后对不同参差频率下的时差进行相关运算最终得出真实的时差。计算机仿真结果表明该方法能够消除时差定位模糊,验证了其可行性和有效性。     

Effect of four-dimensional variational data assimilation in case of nonlinear instability

The effect of four-dimensional variational data assimilation on the reduction of the forecast errors is investigated for both stable and unstable flows. Numerical results show that the effect is generally positive. Particularly,its effect is much more significant in the presence of nonlinear instability     

利用高钠质瓷砂研制无釉玻化砖

以湖北省钟祥县境内开采的高钠质瓷砂为主要原料，试制出了适合低温快烧的玻化砖配方，经１ １７０ ℃的最高温度焙烧，可制得无釉玻化砖。其瓷化完全，具有良好的技术性能，质量完全符合国家标准。可作外墙或地面装饰用。     

科学发展观赋予图书馆的新内涵

论述了图书馆应以科学发展观理论为指导,坚持以读者、馆员为本,以创新为发展动力,推动自身的科学发展。     

基于ISM的多元空间数据共享

论述了多元数据共享的几种不同模式,并提出一种基于ISM的空间数据共享模式.     

Applications of nonlinear optimization methods to quantifying the predictability of a numerical model for El Nino-Southern Oscillation

The nonlinear optimization methods are applied to quantify the predictability of a numerical model for El Nino-Southern Oscillation (ENSO). We establish a lower bound of maximum predictability time for the model ENSO events (i.e. ENSO events in the numerical model), an upper bound of maximum prediction error, and a lower bound of maximum allowable initial error, all of which potentially quantify the predictability of model ENSO. Numerical results reveal the phenomenon of “spring predictability barrier” (SPB) for ENSO event and support the previous views on SPB. Additionally, we also explore the differences between the linear evolution of prediction error and its nonlinear counterpart. The results demonstrate the limitation of linear estimation of prediction error. All these above results suggest that the nonlinear optimization method is one of the useful tools of quantifying the predictability of the numerical model for ENSO.     

表面活性剂在定量分析中的应用

综述了表面活性剂在定量分析化学中的应用．并对其应用前景进行了展望。