县域经济竞争力的评价与分析

县域经济综合竞争力评价的对象是县域社会经济发展的整体状况,评价方法是综合性的,评价必须准确可靠,兼顾适用性和动态性.评价指标体系应遵循完备性、可比性、代表性、可行性等原则,选取能反映县域经济发展水平、发展活力和发展潜力的指标.采用综合因子分析方法,对安徽省2004年各县域经济27个指标进行评价分析,发现安徽省县域经济竞争力整体偏弱.     

中国旅游服务贸易竞争力的影响因素分析

改革开放以来,我国旅游服务贸易保持了快速、健康的发展,中国旅游服务贸易竞争力越来越强,但与世界旅游强国相比仍有很大差距.实证分析的结果表明:我国旅行社数量对提高旅游服务贸易竞争力有促进作用.旅游交通对我国旅游出口收入有显著影响,其影响力要大于旅游产业组织的影响.我国的旅游人力资源状况对于旅游服务贸易竞争力的影响不显著.     

充分发挥家庭因素在大学生就业过程中的作用

大学生就业竞争日趋激烈,影响大学生就业过程的因素很多,其中家庭因素对大学生就业能力的塑造不可忽视,家庭因素对大学生就业质量、就业观念、就业行为有较大影响当前应合理利用家庭因素促进大学生就业.     

由情感因素看教师角色的转换

情感因素在现代教育特别是现代外语教育中的地位越来越突出.积极情感可显著提升教学质量,积极情感的养成需要教师对其角色进行调整.具体来讲,教师要通过尊重学生的个性化选择、以诚相待和培养学生自信心等方法,实现自身由"讲师"向"导师"的角色转换.     

高职学生英语学习内部因素调查分析及对策研究

影响高职学生英语学习绩效存在着多种因素,教师只有了解和掌握学习者影响学习效果的因素才能有的放矢地搞好教学。对北京联合大学高职学生在英语学习中的学习动机、学习态度、学习能力和学习方法等4项内部学习因素进行了调查,分析调查结果及其生成的原因,并提出了一些相应的教学策略。     

Bayesian t-tests for correlations and partial correlations

In this paper, we develop Bayes factor based testing procedures for the presence of a correlation or a partial correlation. The proposed Bayesian tests are obtained by restricting the class of the alternative hypotheses to maximize the probability of rejecting the null hypothesis when the Bayes factor is larger than a specified threshold. It turns out that they depend simply on the frequentist t-statistics with the associated critical values and can thus be easily calculated by using a spreadsheet in Excel and in fact by just adding one more step after one has performed the frequentist correlation tests. In addition, they are able to yield an identical decision with the frequentist paradigm, provided that the evidence threshold of the Bayesian tests is determined by the significance level of the frequentist paradigm. We illustrate the performance of the proposed procedures through simulated and real-data examples.     

Noninformative priors for linear combinations of normal means with unequal variances

For normal populations with unequal variances, we develop matching priors and reference priors for a linear combination of the means. Here, we find three second-order matching priors: a highest posterior density (HPD) matching prior, a cumulative distribution function (CDF) matching prior, and a likelihood ratio (LR) matching prior. Furthermore, we show that the reference priors are all first-order matching priors, but that they do not satisfy the second-order matching criterion that establishes the symmetry and the unimodality of the posterior under the developed priors. The results of a simulation indicate that the second-order matching prior outperforms the reference priors in terms of matching the target coverage probabilities, in a frequentist sense. Finally, we compare the Bayesian credible intervals based on the developed priors with the confidence intervals derived from real data.     

Bayesian testing of restrictions on vector autoregressive models

In this study, we propose a prior on restricted Vector Autoregressive (VAR) models. The prior setting permits efficient Markov Chain Monte Carlo (MCMC) sampling from the posterior of the VAR parameters and estimation of the Bayes factor. Numerical simulations show that when the sample size is small, the Bayes factor is more effective in selecting the correct model than the commonly used Schwarz criterion. We conduct Bayesian hypothesis testing of VAR models on the macroeconomic, state-, and sector-specific effects of employment growth.     

使用PC1D 5.9模拟高效单晶硅太阳能电池

介绍了使用PC1D 5.9软件模拟高效单晶硅太阳能电池的方法。通过建立太阳能电池的结构模型和参数模型,在模拟的电池测试环境下,仿真得到太阳能电池的电压-电流曲线和量子效率曲线,并根据太阳能电池的理论,计算填充因子和转换效率的值。     

罗光生命哲学视野中的“动态生命观”

作为台湾新士林哲学的领军人物罗光先生，在其生命哲学体系中，结合天主教哲学中的“存有”范畴和儒家传统哲学中的“生生之道”，体贴新的生命观，即生命是动态的流动，认为生命的意义就在变易，生命的过程就是生命本体不断生成、变化的过程。