水泥砼路面机械化施工系统理论应用研究(Ⅱ)——系统设计与评价

根据水泥砼路面机械化施工系统的数学模型所描述的水泥砼路面机械化施工系统机械运行的一般规律, 提出了系统设计与评价的标准、方法和步骤, 结合深（ 圳） 、汕（ 头） 高等级公路水泥砼路面机械化施工的实践, 示例系统评价的方法．     

Impacts of trade liberalization on Chinese economy with Belt and Road initiative

China has been continuously implementing the open-door policy for past 15 years ever since it joined the World Trade Organization, which escalated international trade and demand for shipping. Compared with the other major importing countries in the world, China’s importing tariff is relatively low. Under the Belt and Road initiatives, more Free Trade Agreements to be concluded and more Free Trade Zones to be established, it is expected that the effective import tariff rate may continue to decrease in the future. This study analyses the impact of further reduction in Chinese import tariff rate on major economic indicators using a computable general equilibrium (CGE) model and based on the Chinese macro-economic data of 2012. The model results show that, with a balanced international payment, such a reduction can increase GDP, resident consumption, both imports and exports, and reduce GDP price, trade surplus, and government revenue. The results ease the concern that further import tariff reduction may harm the domestic production. Rather, it points out that there are still rooms to improve national economy and increase the consumer utility by trade liberation.     

船舶行业科研声像档案工作探讨

探讨在全面推进知识管理进程背景下船舶科技声像档案的首要工作,论述科技声像信息从采集、整理归存到知识提取过程环节的基本要求和手段,为实现全方位知识资源库建设和以声像为媒介的知识共享、知识交流、知识创造夯实基础.     

Transportation mode detection – an in-depth review of applicability and reliability

The wide adoption of location-enabled devices, together with the acceptance of services that leverage (personal) data as payment, allows scientists to push through some of the previous barriers imposed by data insufficiency, ethics and privacy skepticism. The research problems whose study require hard-to-obtain data (e.g. transportation mode detection, service contextualisation, etc.) have now become more accessible to scientists because of the availability of data collecting outlets. One such problem is the detection of a user's transportation mode. Different fields have approached the problem of transportation mode detection with different aims: Location-Based Services (LBS) is a field that focuses on understanding the transportation mode in real-time, Transportation Science is a field that focuses on measuring the daily travel patterns of individuals or groups of individuals, and Human Geography is a field that focuses on enriching a trajectory by adding domain-specific semantics. While different fields providing solutions to the same problem could be viewed as a positive outcome, it is difficult to compare these solutions because the reported performance indicators depend on the type of approach and its aim (e.g. the real-time availability of LBS requires the performance to be computed on each classified location). The contributions of this paper are three fold. First, the paper reviews the critical aspects desired by each research field when providing solutions to the transportation mode detection problem. Second, it proposes three dimensions that separate three branches of science based on their main interest. Finally, it identifies important gaps in research and future directions, that is, proposing: widely accepted error measures meaningful for all disciplines, methods robust to new data sets and a benchmark data set for performance validation.     

后张法预应力混凝土预制箱梁的施工要点

根据多年工作经验对箱型梁模板的制作和安装要点、钢筋施工的注意事项、混凝土的浇筑以及管道、张拉、压浆的施工方案进行了简要概括和说明，供同行们借鉴、参考，共同达到保质量、促进度、降能耗的目的。     

以冷修补为技术特征的沥青路面综合养护车

在沥青路面修补的各种施工工艺中,冷修补工艺以其特有的诸多优点日益为国内外公路学术界所重视,LLB—6T型冷修补综合养护车的研发是该技术实际应用的成功尝试。     

施工机群配置对温度离析的潜在影响

以沥青砼路面施工机群配置理论为基础,结合我国当前沥青砼路面施工工艺,分析了温度离析产生的主要原因,提出了从机群配置来缓解温度离析的主要措施和基于温度离析的机群配置评价标准.     

基于面板数据的乘用车购买偏好分析

基于2009-2019年中国乘用车销售面板数据,结合车辆特性构建Logit模型,分析车辆特性衍变对消费者需求的响应,对比中国和瑞士乘用车的消费偏好.研究结果显示:发动机燃油效率更高,功率更大的乘用车市场份额占比更高;重型车比轻型车更受中国消费者青睐;燃油效率的边际值在大功率汽车细分市场中较小,即最可能产生更多污染排放的...     

适应市场经济发展,发挥公路定额作用

分析了目前公路工程定额存在的一些问题,不同层面的作用,提出了适应市场经济发展．做好公路定额管理工作的思路和建议。