高职学生英语词汇学习自主性现状调查与分析

根据自主学习理论,本研究编制了包括自主意识、自主能力、自主行为三个维度在内的英语词汇学习自主性调查问卷,旨在研究目前高职学生英语词汇学习自主性的现状,为构建将词汇策略训练融入课堂的教学模式提供参考。调查结果显示:高职学生整体的词汇学习自主性水平一般。三个维度中,高职学生的自主意识水平相对较高,但相应的自主能力和自主行为的欠缺制约了有效学习。针对调查结果,本文提出相应的建议。     

浅析井冈山时期中国基层民主建设

大革命失败后,毛泽东等领导人建立了井冈山革命根据地.以毛泽东为代表的共产党人在井冈山开辟的中国特色的革命道路,不仅是一条将中国革命引向成功的胜利之路,一条符合当时中国国情和革命形势的科学发展之路,而且是一条艰辛探索并取得初步成效的基层民主实践之路.我们党非常注重基层民主建设,尤其是在加强基层民主建设方面作了艰辛的探索并实行了多项基层民主措施,现代基层民主的理念在一定程度上得以体现.我们现在也在进行基层民主建设,井冈山时期所积累的宝贵经验,我们可以借鉴并发扬光大,可以让我们更好地加强民主监督,保障广大群众的民主权利.     

工业缝纫机针杆的气浮轴承性能数值计算与分析

为了对气浮针杆的小孔节流型轴承的支承性能进行研究,文章在建立数学模型的基础上,运用有限差分法对控 制方程进行数值有限差分的推导,利用MATLAB对针杆在低速和高速的情况下的压力分布进行了数值求解。结果表 明：气浮轴承能够较好地实现工业缝纫机的低速和高速情况下的气浮支承;双排节流小孔的压力分布承载效果比单排节 流小孔好;随着气浮针杆运动速度的变化双排节流小孔的气浮轴承的稳定性较好。对进一步深入对工业缝纫机针杆的 气浮支承研究具有指导意义。     

卡塔尔鲁卜哈利盆地古生界生储盖组合特征

卡塔尔鲁卜哈利盆地古生界碎屑岩是油气勘探的新领域,在区域地质研究的基础上,利用石油地质学、储层地质学等理论对古生界的生储盖组合进行研究,并重点分析了盖层发育特征。研究结果表明,卡塔尔鲁卜哈利盆地古生界发育良好的生储盖组合,志留系Qusaiba 热页岩是主力烃源岩,泥盆系Jauf 组滨岸相砂岩和二叠系Unayzah 组河流—三角洲相砂岩是主要储层,二叠系Khuff 组膏岩及底部的海侵泥岩为区域盖层,同时还发育多套局部盖层。盖层的封盖能力是古生界油气勘探的主要风险之一,区域盖层横向分布稳定,且含膏岩,封盖性好,但局部盖层厚度较薄并且泥岩质不纯,夹薄层白云质泥岩和少量粉砂岩,对封盖能力影响较大,盖层风险不容忽视。     

Phase I trial design for drug combinations with Bayesian model averaging

Various statistical models have been proposed for two‐dimensional dose finding in drug‐combination trials. However, it is often a dilemma to decide which model to use when conducting a particular drug‐combination trial. We make a comprehensive comparison of four dose‐finding methods, and for fairness, we apply the same dose‐finding algorithm under the four model structures. Through extensive simulation studies, we compare the operating characteristics of these methods in various practical scenarios. The results show that different models may lead to different design properties and that no single model performs uniformly better in all scenarios. As a result, we propose using Bayesian model averaging to overcome the arbitrariness of the model specification and enhance the robustness of the design. We assign a discrete probability mass to each model as the prior model probability and then estimate the toxicity probabilities of combined doses in the Bayesian model averaging framework. During the trial, we adaptively allocated each new cohort of patients to the most appropriate dose combination by comparing the posterior estimates of the toxicity probabilities with the prespecified toxicity target. The simulation results demonstrate that the Bayesian model averaging approach is robust under various scenarios. Copyright © 2015 John Wiley & Sons, Ltd.     

Bayesian adaptive dose‐escalation procedures for binary and continuous responses utilizing a gain function

One of the main aims of early phase clinical trials is to identify a safe dose with an indication of therapeutic benefit to administer to subjects in further studies. Ideally therefore, dose‐limiting events (DLEs) and responses indicative of efficacy should be considered in the dose‐escalation procedure. Several methods have been suggested for incorporating both DLEs and efficacy responses in early phase dose‐escalation trials. In this paper, we describe and evaluate a Bayesian adaptive approach based on one binary response (occurrence of a DLE) and one continuous response (a measure of potential efficacy) per subject. A logistic regression and a linear log‐log relationship are used respectively to model the binary DLEs and the continuous efficacy responses. A gain function concerning both the DLEs and efficacy responses is used to determine the dose to administer to the next cohort of subjects. Stopping rules are proposed to enable efficient decision making. Simulation results shows that our approach performs better than taking account of DLE responses alone. To assess the robustness of the approach, scenarios where the efficacy responses of subjects are generated from an E _max model, but modelled by the linear log–log model are also considered. This evaluation shows that the simpler log–log model leads to robust recommendations even under this model showing that it is a useful approximation to the difficulty in estimating E _max model. Additionally, we find comparable performance to alternative approaches using efficacy and safety for dose‐finding. Copyright © 2015 John Wiley & Sons, Ltd.     

再论以提高消费率拉动经济增长

提高消费率,扩大消费需求,对经济增长具有重大作用。多年来由于投资率偏高,消费率一直偏低,直接影响着居民消费需求的扩大,必然影响居民消费水平、消费质量的提高,影响消费结构的优化、升级,从而影响产业结构的优化、升级,影响经济增长。提高消费率,拉动经济增长,以利于构建社会主义和谐社会。     

顾炎武的诗学史意义

顾炎武在许多方面都是开有清一代学术风气的大师 ,他的诗学对于清代诗学史同样具有多方面的开创意义。顾炎武诗学既是清初特定文化语境的产物 ,同时又有鲜明的学术个性。他以文化救亡为核心的大文学观代表了当时知识群体的价值取向和学术路径 ,其“真诗”观念的三个层面赋予清初诗坛这一主流意识以道德的内涵 ;他以鉴往训今的方式进行自己的理论建构 ,由此开启了清代诗学的实证学风 ,而独到的诗歌音韵研究则开拓了中国古代诗歌音韵学的处女地。这多方面的贡献确立起顾炎武诗学在清初诗学中的独特意义和在清代诗学史上的重要地位     

我国家族企业的产权特征及其制度学思考

制度变迁是由外部利润的存在引起的变迁需求与供给主体的变迁供给共同作用的结果。我国家族企业现代产权制度变迁在变迁需求的诱致和供给约束下,将经历一条演化之路。在此过程中,企业主的探索和国家的支持都是不可或缺的。