Sufficient conditions for Bayesian consistency

We introduce the Hausdorff α$\alpha$-entropy to study the strong Hellinger consistency of posterior distributions. We obtain general Bayesian consistency theorems which extend the well-known results of Barron et al. [1999. The consistency of posterior distributions in nonparametric problems. Ann. Statist. 27, 536–561] and Ghosal et al. [1999. Posterior consistency of Dirichlet mixtures in density estimation. Ann. Statist. 27, 143–158] and Walker [2004. New approaches to Bayesian consistency. Ann. Statist. 32, 2028–2043]. As an application we strengthen previous results on Bayesian consistency of the (normal) mixture models.     

烯效唑在中稻抛秧上的应用研究

进行了烯效唑、多效唑、赤霉素对中稻抛秧的促控效应的比较试验 ,同时进行了烯效唑不同浓度及施用方法在抛秧上的应用研究。结果表明 :烯效唑配施赤霉素 ,可有效培育抛秧小苗 ,比使用多效唑提早抽穗成熟 ,增加产量     

替吉奥胶囊联合紫杉醇脂质体治疗术后复发胃癌的疗效观察

目的探讨替吉奥胶囊（维康达）联合紫杉醇脂质体全身化疗对术后复发胃癌的近期疗效及不良反应。方法 25例手术后复发胃癌入组,给予替吉奥胶囊联合紫杉醇脂质体方案（替吉奥胶囊按照体表面积给予40～60mg,2次/天,第1～14天;紫杉醇脂质体135mg/m2,第1天静滴90分钟;3周重复）化疗,患者均接受至少2个周期全身化疗后评价疗效。结果总有效率为48%（12/25）,其中完全缓解率8%、部分缓解率40%、稳定率24%,临床获益率达到72%。主要毒副作用有骨髓抑制、周围神经毒性及胃肠道反应。结论替吉奥胶囊（维康达）联合紫杉醇醇脂质治疗术后复发胃癌患者疗效肯定,毒副反应可以耐受。     

On nonparametric Bayesian inference for the distribution of a random sample

The nonparametric Bayesian approach for inference regarding the unknown distribution of a random sample customarily assumes that this distribution is random and arises through Dirichlet-process mixing. Previous work within this setting has focused on the mean of the posterior distribution of this random distribution, which is the predictive distribution of a future observation given the sample. Our interest here is in learning about other features of this posterior distribution as well as about posteriors associated with functionals of the distribution of the data. We indicate how to do this in the case of linear functionals. An illustration, with a sample from a Gamma distribution, utilizes Dirichlet-process mixtures of normals to recover this distribution and its features.     

简易低频信号发生器的制作

信号发生器是一种能产生标准信号的电子仪器,是工业生产和电工、电子实验室中经常使用的电子仪器之一。本文丛电压放大器OP07和功率放大器LM386出发,采用文氏桥振荡电路,探讨制作一种简易的低频信号发生器。     

Analysis of inaccurate data with mixture measurement error models

Measurement error, the difference between a measured (observed) value of quantity and its true value, is perceived as a possible source of estimation bias in many surveys. To correct for such bias, a validation sample can be used in addition to the original sample for adjustment of measurement error. Depending on the type of validation sample, we can either use the internal calibration approach or the external calibration approach. Motivated by Korean Longitudinal Study of Aging (KLoSA), we propose a novel application of fractional imputation to correct for measurement error in the analysis of survey data. The proposed method is to create imputed values of the unobserved true variables, which are mis-measured in the main study, by using validation subsample. Furthermore, the proposed method can be directly applicable when the measurement error model is a mixture distribution. Variance estimation using Taylor linearization is developed. Results from a limited simulation study are also presented.     

Bayesian temporal density estimation with autoregressive species sampling models

We propose a novel Bayesian nonparametric (BNP) model, which is built on a class of species sampling models, for estimating density functions of temporal data. In particular, we introduce species sampling mixture models with temporal dependence. To accommodate temporal dependence, we define dependent species sampling models by modeling random support points and weights through an autoregressive model, and then we construct the mixture models based on the collection of these dependent species sampling models. We propose an algorithm to generate posterior samples and present simulation studies to compare the performance of the proposed models with competitors that are based on Dirichlet process mixture models. We apply our method to the estimation of densities for the price of apartment in Seoul, the closing price in Korea Composite Stock Price Index (KOSPI), and climate variables (daily maximum temperature and precipitation) of around the Korean peninsula.     

Multivariate orthogonal series estimates for random design regression

In this paper a new multivariate regression estimate is introduced. It is based on ideas derived in the context of wavelet estimates and is constructed by hard thresholding of estimates of coefficients of a series expansion of the regression function. Multivariate functions constructed analogously to the classical Haar wavelets are used for the series expansion. These functions are orthogonal in _L2(_μn)$L_2({\mu }_n)$, where _μn${\mu }_n$ denotes the empirical design measure. The construction can be considered as designing adapted Haar wavelets.     

32例替吉奥联合多西他赛治疗复发转移乳腺癌临床观察

目的研究替吉奥（维康达）联合多西他赛治疗蒽环类药物治疗失败复发转移性乳腺癌的疗效和安全性。方法复发转移性乳腺癌患者32例,多西他赛75mg／m2,静脉滴注,dl;替吉奥40mg／m2,2次／日,dl-14,21天为一个周期。治疗2个周期评价疗效及安全性。结果32例患者均可评价疗效,3例（9．4％）CR,14例（43．7％）PR,8例（25％）SD,7例（21．9％）PD。客观有效率（CR＋PR）为53．1％,临床获益率（CR＋PR＋SD）为78．1％。不良反应为骨髓抑制、胃肠道反应等,均可耐受。结论替吉奥联合多西他赛是治疗葸环类药物治疗失败复发转移性乳腺癌的有效方案,其不良反应能够耐受。