LIN总线维修技术特性

局域互联网络(LIN)是一类串行数据通信的网络通信线,LIN的应用大大减少了车辆电气线路的使用数量,降低了电气线路的故障发生率。本文主要从传输方式、信号特性方面介绍LIN总线特性及LIN总线诊断特性。     

City Size,Population Concentration and Productivity: Evidence from China

This paper investigates the impact of China's city size and urban population concentration on city productivity by developing a distinctive index based on global nighttime light data. Using the panel data of 280 prefecture cities from 2004 to 2013 and employing dynamic system generalized method of moments and panel threshold model regression techniques, our results show that city size has a positive impact on city productivity; therefore, cities in China still have the potential to expand. While moderate urban population concentration can benefit city productivity, excessively concentrated urban population distribution may impede the growth of city productivity. We also find that the level of labor income significantly affects the impacts of urban agglomeration on labor productivity. Therefore, our results imply that city development policies should focus more on how to appropriately allocate economic activities and adjust population distribution in urban areas according to different stages of economic development.     

An empirical analysis of night-time light data based on the gravity model

This article aims to explore the feasibility of applying night-time light data to the study of trade. Based on 61 countries’ panel data from 1995 to 2012, this research used night-time light data, as the substitute for GDP, to study trade development based on the traditional gravity model. The method of ordinary least squares, Poisson pseudo-maximum-likelihood and two-stage least squares were used. The results show that geographical distance, country borders and regional agreements have a significant effect on China’s trade with other Belt and Road countries, which verifies the validity of trade research based on night-time light data analysis. Additionally, comparisons reveal the trade trends predicted by night-time light data from 1996 to 2012, were highly consistent with the actual data. This article stands as the first study to apply night-time light data to the gravity model in the research on trade between China and other Belt and Road countries. Breaking new ground, this research uses night-time light data as an economic indicator to study trade, in combination with micro foundations and the latest findings of the gravity model. Thus, this article deepens the understanding of trade analysis and contributing to the field of related researches.     

Do leveraged warrants prompt individuals to speculate on stock price reversals?

Using proprietary data on bank-issued knock-out warrants written on a stock index, we find that individual investors’ aggregate warrant portfolio speculates against the short-term trend of the index. We argue that contrarian trading is driven by the interaction of product design and investors’ preference for large leveraged positions. Investors tend to open larger positions whenever warrants offer higher leverage. As a result, investors open an aggregate long position when calls offer higher leverage than puts. Since knock-out leverages move systematically with the underlying, aggregate warrant positions become contrarian even if investors do not intend to speculate on reversals.     

The challenge of Chinese state‐affiliated multinationals in benefiting from foreign subsidiary knowledge transfer: A criticism of light‐touch integration

Acknowledging the sharp growth of Chinese state‐affiliated multinationals and their strategic asset‐seeking investments abroad, this study investigates the effects of headquarters' home‐country political ties on the multinational‐wide benefits gained from subsidiary knowledge transfer in Chinese multinationals. It also looks at how these effects are mediated by organizational distance and social integration between headquarters and subsidiary. Based on a survey of 177 subsidiaries of 99 Chinese multinationals, we find that headquarters' political ties trigger organizational distance and hinder social integration between headquarters and foreign subsidiaries and these, in turn, hamper the potential benefits that Chinese multinationals derive from subsidiary knowledge transfer. This study identifies new challenges related to political ties and light‐touch integration in gaining benefits from subsidiary knowledge transfer.     

多传感器长途客车智能新风系统设计研究

本研究设计了一种结合二氧化碳传感器、PM2.5粉尘传感器、TVOC传感器来实现智能更新长途客车封闭空间内污浊空气的长途客车车载新风系统。本系统由各项传感器实时采集车厢内CO2、PM2.5、TVOC等数据上传至单片机,单片机判断各项数据是否超过设定阈值,若超过设定阈值,新风系统自动工作改变进、排风量;反之,新风系统不工作,实现智能控制。实验证明,本系统具有明显地改善长途客车内空气质量的效果,能够更好地保护人体健康。     

结构性衍生产品的定价和风险管理技术

准确可靠的定价能力不仅是银行增加资金业务收益、提高风险管理水平的重要前提,而且也是增强银行核心竞争力的技术保障。结构性衍生产品的定价过程通常由三部分构成:一是准确理解和描述产品的结构,二是选择适当的定价模型、市场数据和校准方法,三是选择最优的数值算法,定价过程最终都借助计算机程序来实现。定价的本质就是准确度量风险的价值,实现风险的对冲。最好的风险管理技术应该采用动态 Delta、Vega、Gamma 对冲。中国银行业在结构性衍生产品交易领域起步较晚,先引进外部定价软件,在此基础上逐步自主开发是实现定价能力和风险管理的现实选择。     

多方向客运专线引入客运站站型探讨

在分析传统站型存在问题的基础上,从多方向客运专线引入客运站的作业特点出发,提出了两类4种新站型。从工程投资与满足运营需要等角度,进行综合分析,并辅以应用实例,提出了初步研究结论。     

资产证券化用于我国客运专线建设融资的探讨

我国铁路客运专线建设需要巨大的资金投入，面对建设融资的严峻现实，提出将资产证券化用于铁路客运专线建设融资的设想。在进行可行性分析的基础上，对应用的操作模式和运作过程进行了设计，并对存在的主要障碍和风险进行了论述。指出铁路客运专线的建设，为我国基础设施建设融资引入资产证券化提供了尝试机会。     

大秦线增加资本投入提高运输密度的分析

资本投入对产出数量起决定性作用。通过对大秦线的资本投入对运量增加的影响情况进行分析,说明加强影响列车质量和密度相关设施的资本投入,对提高产出起到重要作用。同时指出对投向大秦线的资本,应向发展重载技术方面倾斜,能对大秦线运输能力的提高起持续性影响作用。