有限大小神经元细胞膜动作电位的温度效应

研究了温度对有限大小神经元细胞膜动作电位的影响．发现随着温度的增加，在相同的时间内神经元产生的脉冲数目有先增加再降低的变化．在中等面积下，平均脉冲间间隔有类似于共振的先降低，达到最小值，再增加的现象．通过计算功率谱以及由功率谱定义的卢因子,很清楚地看到β在某些温度时达到了最大值，产生了相干共振．     

Understanding suburban travel demand: Flexible modelling with revealed and stated choice data

We analyse the choice of mode in suburban corridors using nested logit specifications with revealed and stated preference data. The latter were obtained from a choice experiment between car and bus, which allowed for interactions among the main policy variables: travel cost, travel time and frequency. The experiment also included parking cost and comfort attributes. The attribute levels in the experiment were adapted to travellers’ experience using their revealed preference information. Different model specifications were tested accounting for the presence of income effect, systematic taste variation, and incorporating the effect of latent variables. We also derived willingness-to-pay measures, such as the subjective value of time, that vary among individuals as well as elasticity values. Finally, we analysed the demand response to various policy scenarios that favour public transport use by considering improvements in level-of-service, fare reductions and/or increases in parking costs. In general, demand was shown to be more sensitive to policies that penalise the private car than those improving public transport.     

内河架空直立式集装箱码头结构计算中的作用效应组合探讨

文章中采用单位力法对内河大水位差架空直立式集装箱码头可能出现的荷载工况进行了有限元计算，并采用MATLAB软件编程对计算结果进行分析组合，得到了计算结构各主要构件控制内力的最不利作用效应组合情况，提出了内河架空直立式集装箱码头结构计算的作用效应组合方法。     

浅析音乐美育对大学生幸福感的影响

以审美为核心的音乐教育是21世纪开始的全国音乐教育改革的精髓,基础与立场为重新确立人的感性地位;再次审视什么是“音乐美学”中的“音乐”;强调音乐的特殊性和对音乐审美问题的基本认识．它对大学生幸福感的提升将产生积极作用,根据大学生幸福感的主观性、丰富性、稳定性、整体等四大特点,逐一论述音乐美育对大学生幸福感的影响．     

连续刚构桥悬臂施工阶段的预应力剪力滞效应分析

根据一座主桥为三跨(47m 75m 47m)连续刚构桥的悬臂施工过程,计算分析悬臂施工阶段预应力荷载产生的箱梁剪力滞效应,研究该类桥在整个悬臂施工过程中,每个阶段预应力荷载产生的箱梁剪力滞效应,以及一些关键截面剪力滞效应的变化规律;结果表明,在悬臂施工过程中,悬臂预应力束会对箱梁产生正负剪力滞效应,且负剪力滞效应较大。     

城市客运交通工具碳排放效率差异——以襄阳市为例

为准确测度城市客运工具碳排放效率的差异,探寻多元出行和碳减排双赢的改进路径,本文构建涵盖车辆存量、道路、土地、能源及环境 5 大要素体系,利用三阶段超效率 SBM-DEA (Slacks-Based Measure)模型和SFA(Stochastic Frontier Approach)方法,测度城市客运工具碳排放效率,并厘清政策和外生环境因素对投入要素冗余的影响;构建效率贡献度和边际效应模型分析投入产出要素的效率贡献度及其边际效应。基于襄阳市的案例表明：7种客运工具的碳排放效率呈传统公共交通(含巡游车)大于共享交通大于私人交通的差异化态势;外生环境因素中,优化能源结构能显著减少能源资源的多余消耗,交通工具的便捷性对消除多余投入具有显著积极作 用。效率贡献度结果反映碳排放效率提升路径的异质性：车辆规模过剩是制约共享交通碳排放效率的主要原因,规模每减少10%,效率分别提高12.0%(网约车)和19.8%(共享电踏车)。清洁能源发展对私家车碳排放效率的提升作用较大,清洁比例每增加10%,碳排放效率平均提高8.9%。 在现阶段公交优先发展水平下,公交车平均运行速度每增加1 km∙h-1 ,碳排放效率提高0.201。 并从技术和管理两方面提出改善碳排放效率的建议和措施。     

高职汽车专业校企合作的探索——以佛山职业技术学院长安福特项目为例

文中针对长安福特汽车学院的校企合作办学的情况,介绍了汽车学院的合作模式、合作方式及内容,并总结了校企合作的成效。同时,针对校企合作中存在的的问题,提出了解决措施。     

DP3动力定位系统海上失效模拟试验的过程分析

本文将介绍和分析一种超深水钻井船动力定位系统,在海上试航期间所进行的失效模拟试验,从动力定位相关各舱室分割及系统检查,不间断电源失电及放电试验,左右舷各电站失电试验等,按程序逐步模拟来验证所设计建造的三级动力定位系统满足分割和规范要求。     

Investor herding behaviour in globally listed shipping stocks

ABSTRACT

This study undertakes one of the first empirical attempts to investigate and contribute a set of innovative findings to investor herding behavior and herding spillover effects in globally listed shipping company stock returns. Distinguishing between OECD and Non-OECD markets, herding behavior is tested on a diversified set of shipping companies traded in international equity markets, over different business cycle phases, financial crises, and external shocks. A set of dynamic models, well established in the relevant behavioral finance literature, is implemented. Empirical evidence indicates investor herding behavior in shipping stock returns and herding spillover effects between different shipping sectors, albeit not robust in all cases. These challenging findings can have a material impact on efficient investment and financing decisions of shipping market players.     

斜拉-悬索协作体系桥的温度效应分析

对自锚式和地锚式2种斜拉-悬索协作体系桥进行了成桥后的温度效应分析,分别考虑了体系温差、索梁塔温差、索塔日照、索梁日照4方面的影响,并对比了2种体系的结果.结果显示温度效应对2种体系内力和位移的影响都比较大,不同种类的温度效应对2种体系的影响程度也不相同,并对其原因进行了分析.