On-Line Scheduling of Two-Machine Open Shops Where Jobs Arrive Over Time

We investigate the problem of on-line scheduling two-machine open shops with the objective of minimizing the makespan.Jobs arrive independently over time, and the existence of a job is not known until its arrival. In the clairvoyant on-line model, the processing requirement of every job becomes fully known at the arrival of the job, while inthe non-clairvoyant on-line model, this processing requirement is notknown until the job is processed and completed.In both models, scheduling of a job is irrevocable.We study the two-machine open shop problem for both models in the preemptive and in the non-preemptive version. For each of the four variants, we provide an algorithm that is best possible with respect to the worst-case performance. In the clairvoyant on-line model, the best worst-case performance ratios are 5/4 (preemptive) and 3/2 (non-preemptive), and in the non-clairvoyant on-line model, they are 3/2 (preemptive and non-preemptive).     

CeO2／蛇纹石体系对饮用水的脱氟行为研究

本文探讨了利用均相沉淀法制备的二氧化铈的脱氟行为,并利用蛇纹石作为载体,对CeO2/蛇纹石体系的除氟行为及最佳条件进行了进一步的研究,结果表明：均相沉淀法得到的二氧化铈除氟效率高,除氟容量可达11.76mg/g。以二氧化铈;蛇纹石为1：10的混合体系的除氟容量大大高于其他方法处理过的蛇纹石体系,其附近氟容量达到0.568mg/g。     

Decomposing the predictive performance of the moving average trading rule of technical analysis: the contribution of linear and non-linear dependencies in stock returns

The main purpose of this work is to decompose the predictive performance of the moving average (MA) trading rule and find out the portion that could be attributed to the possible exploitation of linear and non-linear dependencies in stock returns. Data from the General Index of the Athens Stock Exchange, from the Standard and Poor-500 Index of the New York Stock Exchange and from the Austrian Traded Index of the Vienna Stock Exchange are filtered by linear filters so as the resulting simulated ‘returns’ exhibit no serial correlation. Applying MA trading rules to both the original and the simulated indices and using a new statistical testing procedure that takes into account the sensitivity of the performance of the trading rule as a function of the length of the MA it is found that the predictive performance of the trading rule is clearly weakened when applied to the simulated indices indicating that a substantial part of the rule's predictive performance is due to the exploitation of linear dependencies in stock returns. This weakening is uneven; in general the shorter the MA length the more pronounced the attenuation.     

A Corrected Plug-in Method for Quantile Interval Construction Through a Transformed Regression

We propose a corrected plug-in method for constructing confidence intervals of the conditional quantiles of an original response variable through a transformed regression with heteroscedastic errors. The interval is easy to compute. Factors affecting the magnitude of the correction are examined analytically through the special case of Box–Cox regression. Monte Carlo simulations show that the new method works well in general and is superior over the commonly used delta method and the quantile regression method. An empirical application is presented.     

中华传统美德的个体性展示

中华民族传统美德是中华民族的优秀遗产,需要中华民族一代一代人不断传扬下去。在这个过程中,社会全方位的美德倡导播撒,是个体展示的最佳环境和前提,同时又是个体展示的机遇。但社会展示只是一个形式和要求,社会展示要通过一个个个体展示落到实处,个体性展示才是具体可视和可操作性的,是社会展示的承载,没有这个承载,社会弘扬与展示只是一个空壳,无根无基。由此,强化个体性展示,对个体性展示提出更高更具体要求,是中华民族传统美德弘扬与践行的根本所在。     

关联理论与跨文化交际会话含义的理解

随着跨国度,跨文化之间的交往日益频繁,交际障碍问题也日益突出,为此会话含义的理解显得尤为重要,Sperber和W ilson在他们合著的《关联:交际与认知》(1986/1995)一文中提出来的关联理论,是认知语用学的基础,它在语言学界产生了空前的影响,并引起了广泛的注意。正确理解和掌握这种理论的基本观点,探讨认知语境在话语理解中的作用,有利于加深对交际本质的认识,有利于会话含义的理解,有利于进行成功的跨文化交际,     

寡占型企业技术创新竞争的模型分析

在现代技术创新过程中,以寡占企业为主体的市场结构发挥着越来越显著的作用。这种寡占型市场结构是一种松散型寡占结构,有利于保持适度的技术创新速度。在现代经济条件下,寡占型企业的合作创新已成为越来越重要的技术创新形式。     

贵州少数民族传统体育表演项目调查分析

观摩贵州省第七届少数民族传统体育运动会,调查表演项目中34个参赛节目的文化特征,对节目中表演者用身体行为演绎少数民族传统文化的表演活动进行分析。     

第三方回购逆向供应链系统定价策略研究

基于单一制造商和单一回购商构成的逆向供应链系统,应用博弈理论对逆向供应链定价策略进行研究,分别得出了两个非合作博弈的均衡解(Stackelberg均衡和Nash均衡)和一个合作博弈的均衡解(联合定价),得出与非合作定价相比,联合定价策略使得制造商和回购商的收益同时提升.对各种定价策略的效率以及利润分配情况进行分析表明,随着回购品在回购市场上价格弹性的增加,制造商获得的系统利润分配额度逐渐减小,并且需要通过出让部分的领导者地位,才能与回购商达成协调.     

农业经济效益评价的综合指数法探讨

统计指标体系能全面地反映农业经济效益,但指标过于繁杂,不便于对比分析。综合指数法利用农业经济效益的主要指标,计算农业经济效益的综合指数值,作为衡量其综合水平的一个量度,可对农业经济效益进行综合分析。