我国对外直接投资的实证研究:IDP检验与趋势分析

本文选取1985-2004年间的对外直接投资及其相关数据作为研究样本,在IDP理论的框架内,通过数据和模型变量优化,就我国对外直接投资与经济发展阶段之间的关系进行了实证检验。同时,从量化的角度,通过国际比较对我国对外直接投资的发展趋势做了进一步的分析。     

我国对外投资发展阶段的实证分析

近年来,我国在吸收国际直接投资的同时,也逐渐开始对外进行投资。本文利用投资发展路径理论,分析研究了中国近几年国际直接投资流入和流出的情况,指出中国正处于投资发展路径理论的第二阶段,而且在积极地向第三阶段转变。本文又通过横截面数据分析了不同地区和省份的投资发展路径所处阶段。最后就吸收外资和对外直接投资的发展提出一些对策。     

Medium-term determinants of current accounts in industrial and developing countries: an empirical exploration

This paper provides an empirical investigation of the medium-term determinants of current accounts for a large sample of industrial and developing countries, utilizing an approach that highlights macroeconomic determinants of longer-term saving and investment balances. Cross-section and panel regression techniques are used to characterize the variation of the current account across countries and over time. We find that current account balances are positively correlated with government budget balances and initial stocks of net foreign assets. Among developing countries, measures of financial deepening are positively associated with current account balances while indicators of openness to international trade are negatively correlated with current account balances.     

无线射频识别技术在药品安全管理中的应用研究

药品安全管理不仅需要制度的建设和完善,同时也需要充分利用现代科学技术实现监管自动化,减少人为干预。本文针对无线射频识别技术(RFID)的特点,研究RFID在药品安全管理中的应用。阐述了药品安全管理的内容,分析了RFID在我国药品行业推广应用面临的困难。最后,结合条形码技术提出了药品供应链追溯管理的RFID应用模式,并从技术层面介绍了药品企业RFID应用架构设计和药品监管平台实现的思路。     

铁路运输安全非结构化数据分析与技术架构研究

铁路运输安全非结构化数据蕴含了重要的铁路运输安全信息,研究非结构化数据体系、特点、分析价值及分析方法对提高铁路运输安全管理水平具有重要意义。基于铁路运输安全体系,梳理铁路各类安全系统以及系统产生的非结构化数据,构建铁路运输安全非结构化数据体系架构。分析铁路运输安全非结构化数据特点,总结铁路安全非结构化数据的5V大数据特征。从影响铁路运输安全的人员、设备、环境、管理及综合因素等方面对铁路运输安全非结构化数据进行价值分析。按照铁路运输安全非结构化数据分析流程以及大数据技术谱系,搭建基于大数据技术的铁路运输安全非结构化数据分析技术架构。研究可以为铁路安监人员以及大数据分析人员提供铁路运输安全非结构化数据分析思路。     

Determinants of motor carrier safety technology adoption

In this paper, we investigate the organizational determinants of safety technology adoption. To shed light on this important question, we develop and test nine hypotheses. Results are based on a national survey of motor carriers sponsored by the United States Department of Transportation. Using a Poisson regression model, we find statistical support for seven hypotheses. A key finding is that prior safety performance influences a firm’s adoption of safety technologies. Additionally, a firm’s optimism about the potential for safety technologies, its technological innovativeness, and its level of comfort with new technologies contribute to its safety technology adoption decisions.     

实现最基本的AJAX框架的方法

AJAX即"Asynchronous JavaScript and XML"(异步JavaScript和XML),AJAX并非缩写词,而是由Jesse James Gaiiett创造的名词,是指一种创建交互式网页应用的网页开发技术。     

对上市公司控股股东侵占中小股东利益的探讨

近年来，我国上市公司控股股东侵占中小股东利益的事件频频发生。控股股东作为上市公司的所有，是通过直接侵占上市公司利益进而间接侵占中小股东利益的。既然控股股东也是公司的所有，利益也与公司利益紧密相关，因而，这种侵占行为也必然会给自己造成损失。那么，控股股东侵占上市公司利益(进而侵占中小股东利益)的动机又是什么?本试图就控股股东的侵占动机、强烈程度进行量的度量、分析，提出保护中小股东利益的建议。     

Video-based pedestrian grouping model considering long-span space in a big hall

Pedestrian group detection is a challenging but significant issue in pedestrian flow control and public safety management. To address the issue that most conventional pedestrian grouping models (PGMs) can only identify a pedestrian group at a limited distance of less than 2 m, this study extended the pedestrian distance constraint of conventional PGMs with a reconstruction of the normal group detection criterion and development of a novel group detection criterion suitable for long-span space. To measure the movement behavior similarity with normal distance, five necessary constraints: velocity difference, moving direction offset, distance limitation, distance fluctuation, and group-keeping duration were studied quantitatively to form the criterion to detect normal groups. Meanwhile, a long-span group detection criterion was proposed with extended distance and direction consistency constraints. Therefore, this study proposed an improved PGM that considers long-span spaces (PGMLS). In the PGMLS workflow, the MMTrack algorithm was used to obtain pedestrian trajectories. A difference measurement method based on sequential pattern analysis (SPA) was adopted to analyze the velocity similarity of pedestrians. To validate the proposed grouping model, experiments based on pedestrian movement videos in the exit hall of the Shanghai Hongqiao International Airport were conducted. The results indicate that the proposed model can detect both normal and widely separated pedestrian groups, with a long span range of 2–12 m.     

几内亚马西铁路限制坡度方案研究

几内亚马西铁路是服务于西芒杜矿区企业铁矿石产品的铁路外运的重要基础设施,其限制坡度的确定是影响线路走向的主要技术标准,同时对工程投资、建设规模、运输能力、运营效果及行车安全性等至关重要。在阐述马西铁路现状的基础上,对马西铁路限制坡度取值范围进行估算,提出6‰/9‰均衡坡方案、6‰/13‰均衡坡方案、9‰/13‰均衡坡方案3种限制坡度方案,分析影响马西铁路限制坡度选择的主要因素,并通过车流特点、沿线地形地貌、机车类型、牵引质量、工程适应性及投资等方面对不同坡度方案进行分析比选,在满足研究年度运输需求前提下采用综合费用现值法,推荐采用6‰/9‰分方向选择限制坡度的均衡坡方案,研究成果对国内外货运铁路限制坡度的选择具有一定的指导和借鉴意义。