我国外汇储备与CPI关系的实证分析

近几年来我国外汇储备不断增加,CPI也持续出现了上涨现象。根据2009—2011年我国外汇储备、CPI的月度数据,利用Eviews3.0软件进行实证分析,结果显示:我国外汇储备与CPI之间存在着一定的因果关系,CPI的变动同我国外汇储备变动是一致的,外汇储备剧增对CPI上涨起着间接作用。因此,我国应改革现行的外汇管理制度及人民币汇率形成机制,实现"藏汇中央"和"藏汇于民",并且逐步实现我国外汇储备的多元化。     

Adaptive detector design of MIMO radar with unknown covariance matrix

The problem of detecting signal with multiple input multiple output (MIMO) radar in correlated Gaussian clutter dominated scenario with unknown covariance matrix is dealt with. The general MIMO model, with widely separated sub-arrays and co-located antennas at each sub-array, is adopted. Firstly, the generalized likelihood ratio test (GLRT) with known covariance matrix is obtained, and then the Rao and Wald detectors are devised, which have proved that the Rao and Wald test coincide with GLRT detector.To make the detectors fully adaptive, the secondary data with signal-free will be collected to estimate the covariance. The performance of the proposed detector is analyzed, however, it is just ancillary. A thorough performance assessment by several numerical examples is also given, which has considered the sense with co-located antennas configure of transmitters and receivers array.The results show that the performance the proposed adaptive detector is better than LJ-GLRT, and the loss can be acceptable in comparison to their non-adaptive counterparts.     

高固含量无皂乳液的制备及应用研究进展

简要介绍了无皂乳液的稳定原理以及获得高固含量无皂乳液的主要方法，概括了高固含量无皂乳液的研究进展及其应用前景。     

TBP对N,N-双取代单酰胺萃取铀(Ⅵ)的影响

研究了TBP对N ,N -双取代单酰胺萃取铀的影响 ,发现TBP浓度低时存在协同效应 ,TBP浓度高时出现反协萃现象。结合体系物理化学性质对上述实验结果进行了讨论。堆积模型结果表明协萃合物结构处于堆积稳定区     

A high-performance narrowband high temperature superconducting filter

Recent development of a high-performance narrowband high-temperature superconducting (HTS) filter is presented. A 10-pole quasi-elliptic function response filter with two pairs of transmission zeros (for high selectivity), which has a center frequency of 2.185 GHz and a 3 dB bandwidth of 10 MHz (a fractional bandwidth of 0.45%), is introduced. The filter was fabricated on a 40 mm×16 mm×0.5 mm MgO wafer with double-sided YBCO films. The measured results show that the filter has 0.15 dB insertion loss at the ...     

HB（N5）3M （M=Li, Na, K, and Rb）： A new kind of pentazolides as HEDMs

HB(N5)3M (M = Li,Na,K,and Rb) have been investigated as potential high-energy density materials in the present paper by means of density functional theory.They all show kinetic stabilities as to the breakup of N5 ring.Their kinetic stabilities decrease in the order of Li,Na,K,and Rb.Compared to HB(N5)3K and HB(N5)3Rb,HB(N5)3Li and HB(Ns)3Na have higher transition state barriers and are of significantly higher energy content,and thus they are suggested to be more practical and suitable as potential high-energy density materials.     

泊松流形的约化

当一个李群作用在一般的泊松流形上,并带有矩映射（动量映射）J：P→g＊时,可分为J是Ad＊-等变与非Ad＊-等变两种情形,分别考虑它们的约化问题并考虑这种约化所得的约化相空间与一般约化相空间G／P的关系.     

Taylor级数与Padé逼近

针对Taylor级数展开中出现的问题,引入了解决这一问题的有效方法——Padé逼近方法,并给出了Padé逼近的一些重要性质     

方波激励下二阶带通滤波器性能研究

通过对方波激励下二阶带通滤波器（ＢＰＦ）的分析和实验，得出输入阻 方波上叠加冲击函数是影响ＢＰＦ输出正弦波幅值及相位的主要原因，低输入阻抗及输入接电容的二阶ＢＰＦ具有良好的方波－－正弦波转换性能。