甲基丙烯酸甲脂和丙烯酸苄脂共聚物无皂水溶胶C.C.C.值和表面羧基含量的研究

用溶液聚合法合成了三种ＡＡ含量不同的丙烯酸脂共聚物,通过滴加中和剂ＤＥＡＥ 而制成无皂水溶胶．用分光光度法测定其透光率,得出水溶胶临界电解质结果相吻合,水溶胶的稳定性随丙烯酸含量增加而提高。     

CAN总线测控节点智能核心的研究

介绍了现场总线测控节点的智能体系的原理和一种实用的设计方法。从结构简便、实用性强、可靠性高的角度出发 ,对系统的构成作了阐述 ,并对使用的新器件的主要功能和使用方法作了说明。同时介绍了系统中非易失性数据保存的一种实用方法     

C/S应用程序的几种优化策略及其比较分析

C/S 应用程序分布于客户机和服务器两个逻辑实体,共同协调地完成任务,其固有优良性能的发挥与这种分布是否合理直接相关.本文讨论了组件分布与定位、组件内部处理方式以及组件间通信传输等与系统性能的关系,对几种常用优化策略进行了总结和比较.     

Bootstrap methods for heteroskedastic regression models: evidence on estimation and testing

This paper uses Monte Carlo simulation analysis to study the finite-sample behavior of bootstrap estimators and tests in the linear heteroskedastic model. We consider four different bootstrapping schemes, three of them specifically tailored to handle heteroskedasticity. Our results show that weighted bootstrap methods can be successfully used to estimate the variances of the least squares estimators of the linear parameters both under normality and under nonnormality. Simulation results are also given comparing the size and power of the bootstrapped Breusch-Pagan test with that of the original test and of Bartlett and Edgeworth-corrected tests. The bootstrap test was found to be robust against unfavorable regression designs.     

The compelling urge to misbehave: Do impulse purchases instigate unethical consumer behavior?

The present research explores the relationship between impulse buying and unethical consumer behavior. This work is based on the surprising results of an unrelated study, during which we observed that participants shopping for impulse products were more likely to cheat to obtain a more expensive product than participants shopping for regular products. Based on these findings and building on previous research on the relationship between impulsiveness and delinquency, three studies were set up to test the impact of impulse buying on different forms of unethical consumer behavior. The results confirmed that consumers making an impulse purchase were more likely to behave unethically than consumers making a regular purchase. These findings illustrate there is a dark side to impulse buying for retailers.     

Parametric and semiparametric hypotheses in the linear model

The independent additive errors linear model consists of a structure for the mean and a separate structure for the error distribution. The error structure may be parametric or it may be semiparametric. Under alternative values of the mean structure, the best fitting additive errors model has an error distribution which can be represented as the convolution of the actual error distribution and the marginal distribution of a misspecification term. The model misspecification term results from the covariates' distribution. Conditions are developed to distinguish when the semiparametric model yields sharper inference than the parametric model and vice versa. The main conditions concern the actual error distribution and the covariates' distribution. The theoretical results explain a paradoxical finding in semiparametric Bayesian modelling, where the posterior distribution under a semiparametric model is found to be more concentrated than is the posterior distribution under a corresponding parametric model. The paradox is illustrated on a set of allometric data. The Canadian Journal of Statistics 39: 165–180; 2011 ©2011 Statistical Society of Canada     

Generalized choice models for categorical time series

The NDARMA models of Jacobs and Lewis (1983) allow the modeling of categorical processes with an ARMA-like serial dependence structure. These models can be represented through a backshift mechanism, and we analyze marginal and bivariate properties of the resulting backshift process. Motivated by this backshift mechanism, we define the new class of generalized choice (GC) models, which include the usual NDARMA models as a special case, and we derive results describing the marginal and bivariate distribution of the GC model. We discuss implications concerning DMA(∞) models and the serial dependence structure of NDARMA models. Examples show that the family of GC models allows creating sparsely parametrized models for categorical processes with different types of serial dependence structure.     

吉林省城市商圈发展策略研究

城市商圈建设是区域经济发展的重要环节,在吉林省经济发展中起到重要作用。吉林省经济发展进入以消费促升级的“新常态”,通过城市商圈的产业集聚和市场流通效应,完善市场配置资源模式,增内需求发展的任务非常紧迫。目前,吉林省所辖的九个地级市的城市商圈根据销售能力可以划分为三个层级,吉林省地级市的城市商圈存在结构不合理,定位不清晰,城市间联系弱化,智慧型商圈建设落后,基础配套设施不完善等问题。吉林省规划城市商圈的布局及发展路径应根据“生态文明”建设的要求,基于空间结构理论和以人为本的4C营销理论,结合吉林省的实际情况,从宏观、中观、微观三个方面制定策略,即宏观上侧重城市间商圈布局的协调,中观上注重城市商圈体量规模调节,微观上加强智慧型商圈建设,提升城市商圈的运营效率。     

衡阳佛教旅游景区景点名称的英译简析

景点名称是特定景点的标志,不仅表达了建筑用途,而且和特定的历史文化背景相联系,而佛教景点名称更是承载了丰富的佛教特色文化.翻译时既要准确理解源语基本信息,又要传达其特定丰富的文化内涵.文章从分析佛教旅游景点名称的结构与分类入手,同时以功能目的论为指导,结合衡阳佛教旅游景点名称的实践材料详细介绍了几种有效的景点名称的翻译方法：英译,翻译对,音译加注释,梵语加注释.译者需要根据具体的景点名称,充分传达源语语义和文化色彩,达到的翻译的功能和目的.     

用图象处理计算青光眼视乳头的杯盘面积比

视乳头杯盘比是青光眼早期诊断的重要指标之一,利用图象处理技术,可以清楚地抽取出杯轮廓和盘轮廓,并计算出在每个象限内杯面积、盘面积及其比值(C/D)。