压缩真空态的振幅平方压缩

本文依据Hillery的振幅平方压缩概念，研究了压缩真空态的振幅平方压缩效应。研究结果表明，压缩真空态可呈现最大的振幅平方压缩。     

Robust scale estimation in the error-components model using the empirical characteristic function

Robust estimators of the scale parameters in the error-components model are described. The new estimators are based on the empirical characteristic functions of appropriate sets of residuals and are affine equivariant, consistent and asymptotically normal. The robustness of the new estimators is investigated via influence-function calculations. The results of Monte Carlo experiments and an example based on real data illustrate the usefulness of the estimators.     

单喷管轴对称引射器／扩压器装置几何尺寸对性能的影响

本文分析了单喷管引射器／扩压器装置几何尺寸对其性能的影响，提出了若干在设计中应遵循的几何尺寸范围，以利于设计高效引射器／扩压器装置，对提高舰船生存能力具有实际应用价值．     

激光参数综合测量研究

本文研究了激光参数综合测量的方法。实现了单机对小功率连续激光器输出功率P_(out)、稳定性P_w、光斑功率密度σ、横向模式TEM、光束半径r、光束发散角θ等参数的综合测量。按本设计方案研制的激光参数测量仪,还可用于其他光学测量研究。通过研究较成功地解决了激光参数测量中,光谱响应补偿、时漂、温漂和背景噪声扣除等几个关键问题,使功率测量分辨率达10~(-10)W,稳定度优于0.4％。     

On the Bayesian analysis of categorical data: the problem of nonresponse

It is demonstrated how a suitably chosen prior for the frequency parameters can streamline the Bayesian analysis of categorical data with missing entries due to nonresponse or other causes. The two cases where the data follow the Multinomial or the Hypergeometric model are treated separately. In the first case it is adequate to restrict the prior (for the cell probabilities) to the class of Dirichlet distributions. In the case of the Hypergeometric model it is convenient to select a prior from the class of Dirichlet-Multinomial (DM) distributions. The DM distributions are studied in some details.     

Fixed‐Effects Dynamic Panel Models,a Factor Analytical Method

We consider the estimation of dynamic panel data models in the presence of incidental parameters in both dimensions: individual fixed‐effects and time fixed‐effects, as well as incidental parameters in the variances. We adopt the factor analytical approach by estimating the sample variance of individual effects rather than the effects themselves. In the presence of cross‐sectional heteroskedasticity, the factor method estimates the average of the cross‐sectional variances instead of the individual variances. The method thereby eliminates the incidental‐parameter problem in the means and in the variances over the cross‐sectional dimension. We further show that estimating the time effects and heteroskedasticities in the time dimension does not lead to the incidental‐parameter bias even when T and N are comparable. Moreover, efficient and robust estimation is obtained by jointly estimating heteroskedasticities.     

中国农村碳排放核算及分析: 1999~2010

采用能值转换法、排放参数法和农田碳排放综合核算法定量核算了1999～2010年中国农村碳排放量。然后采取对数平均权重Divisia分解法建立因素分解分析模型,将影响农村人均碳排放的因素分解为碳排结构、碳排强度、产能效率和经济增长四大因素,通过模型分析了各因素对农村碳排放量的影响值和影响率。结果显示,在1999～2010年的大部分时间里中国农村碳排放量保持增长,经济增长和能源结构是推动农村碳排放增长的主要因素。最后,根据分析结果提出政策建议。     

区域环境府际合作治理的实现机制

区域府际合作是治理区域性环境问题的应然选择。为此,揭示区域环境府际合作治理的实现机制十分必要。在分析京津冀区域大气污染联防联治现实问题的基础上,运用协同学理论中的序参量原理识别区域环境府际合作治理的序参量有：命运共同体理念、激励相容的交叉利益、完善高效的制度安排以及充分的信息共享,其分别构成了区域环境府际合作治理的理念引导机制、利益激励机制、制度保障机制和信息减熵机制。要实现区域环境治理的府际有效合作,应积极孵化和培育序参量,包括塑造共同愿景、实行多元补偿、完善规则程序以及打破信息壁垒等。     

Cramér-Rao lower bounds for estimators based on censored data

The Cramér-Rao lower bounds for the variances of unbiased estimators based on censored data are given. Useful techniques of evaluation are then derived for these lower bounds. Examples are given to illustrate these techniques. Small-sample comparisons are made between the resulting lower bounds, the variances of the best linear unbiased estimators, and the variances of unbiased esti-mators which are based on the maximum likelihood estimators.