中央苏区调查统计工作的内容和成效 ——中央苏区调查统计工作的光辉实践与有益启示（二）

 中央苏区制发了众多的统计报表全面反映战争和建设情况，采取多种调查统计方法确保数据真实可靠，并利用丰富的调查统计资料积极开展统计分析，及时发布统计资料，为革命战争和苏区经济建设服务。     

Demand Systems Estimation With Microdata: A Censored Regression Approach

Demand systems estimation increasingly makes use of household-level microdata, mainly to measure the effects of demographic variables. Data based on these household-expenditure surveys present a major estimation problem. For any given household, many of the goods have zero consumption, implying a censored dependent variable. Techniques which do not take this censored dependent variable into account will yield biased results. We utilize a censored regression approach that is computationally simple, consistent, and asymptotically efficient. The results are then presented and compared with those obtained using an uncensored technique.     

基于Web的运动生物力学教学实验系统的设计与实现

运用ASP、JavaScript等Web技术设计出B/S结构的运动生物力学教学实验系统.B/S结构的实验系统使进行运动生物力学实验的实验地点、实验时间变得更为灵活,在一定程度上提高了学生学习的自主性.     

"毛泽东思想概论"课程教学改革研究与实践

毛泽东思想博大精深,是中国化的马克思主义,是党和国家宝贵的精神财富,是培养当代大学生爱国主义、集体主义、社会主义思想,树立科学的世界观、人生观、价值观的重要精神食粮."毛泽东思想概论"是国家教育部确定的政治理论课改革中力度最大的一门全新课程.为此,在对该课进行深入的分析研究的基础上,提出教学改革的方式、方法和措施,并在教学中进行了初步尝试.     

Missing at random (MAR) in nonparametric regression - A simulation experiment

The additive model is considered when some observations on x are missing at random but corresponding observations on y are available. Especially for this model, missing at random is an interesting case because the complete case analysis is expected to be no more suitable. A simulation experiment is reported and the different methods are compared based on their superiority with respect to the sample mean squared error. Some focus is also given on the sample variance and the estimated bias. In detail, the complete case analysis, a kind of stochastic mean imputation, a single imputation and the nearest neighbor imputation are discussed.     

OPTIMAL EXPERIMENTAL DESIGNS FOR MULTILEVEL MODELS WITH COVARIATES

In this paper optimal experimental designs for multilevel models with covariates and two levels of nesting are considered. Multilevel models are used to describe the relationship between an outcome variable and a treatment condition and covariate. It is assumed that the outcome variable is measured on a continuous scale. As optimality criteria D-optimality, and L-optimality are chosen. It is shown that pre-stratification on the covariate leads to a more efficient design and that the person level is the optimal level of randomization. Furthermore, optimal sample sizes are given and it is shown that these do not depend on the optimality criterion when randomization is done at the group level.     

浅析网络营销的发展趋势

网络营销是21世纪企业营销实践与现代信息通讯技术、计算机网络技术相结合的产物，它以广阔的范围和低廉的价格正在逐步占领市场的每个角落，并且成为一种重要的营销方式。中国经济及其互联网飞速发展的情况、网络新技术发展和网络最根本的互动性这三方面推动着网络营销呈现加速发展的态势。它必将成为覆盖面最大、最新的营销方式。     

Multilevel modelling of refusal and non-contact in household surveys: evidence from six UK Government surveys

Summary.  We analyse household unit non-response in six major UK Government surveys by using a multilevel multinomial modelling approach. The models are guided by current conceptual frameworks and theories of survey participation. One key feature of the analysis is the investigation of the extent to which effects of household characteristics are survey specific. The analysis is based on the 2001 UK Census Link Study, which is a unique source of data containing an unusually rich set of auxiliary variables. The study contains the response outcome of six surveys, linked to census data and interviewer observations for both respondents and non-respondents.     

Robust models in probability sampling

In the estimation of a population mean or total from a random sample, certain methods based on linear models are known to be automatically design consistent, regardless of how well the underlying model describes the population. A sufficient condition is identified for this type of robustness to model failure; the condition, which we call 'internal bias calibration', relates to the combination of a model and the method used to fit it. Included among the internally bias-calibrated models, in addition to the aforementioned linear models, are certain canonical link generalized linear models and nonparametric regressions constructed from them by a particular style of local likelihood fitting. Other models can often be made robust by using a suboptimal fitting method. Thus the class of model-based, but design consistent, analyses is enlarged to include more realistic models for certain types of survey variable such as binary indicators and counts. Particular applications discussed are the estimation of the size of a population subdomain, as arises in tax auditing for example, and the estimation of a bootstrap tail probability.     

多媒体网络技术在“英国概况”教学中的应用

“英国概况”是高校英语专业课程《英语国家概况》的一部分。该课程因教材内容繁多、抽象且课时有限而影响了教学效果。应用多媒体网络技术,根据文字介绍,配以大量的图片和实景资料,制作课件,既突出了教学重点,提高了单位时间内的教学效率,又使教学内容变得形象、直观、具体,以可见的事实创设情景,从而激发学习兴趣、使学生加深对英国概况的理解,还为学生自主学习创造了条件。