“互联网+”背景下铁路发展电子商务的对策建议

铁路在“互联网＋”背景下发展电子商务面临诸多机遇和挑战。铁路企业要抓住机遇，应对挑战，积极创建电子商务平台，推动铁路与互联网的深度融合与发展。为此，应明确发展目标，加强电子商务平台建设，创新经营思路，拓宽服务领域，借助电子商务平台优化资源配置。为提升电子商务发展水平，铁路企业要丰富服务类型，制定柔性的定价机制，充分发挥铁路的资源优势和成本优势。     

Short-term forecasting of Japanese tourist inflow to South Korea using Google trends data

We utilize the Internet search data from Google Trends to provide short-term forecasts for the inflow of Japanese tourists to South Korea. We construct the Google variable in a systematic way by combining keywords to minimize mean squared or mean absolute forecasting errors. We augment the Google variable to the standard time-series forecasting models and compare their forecasting accuracies. We find that Google-augmented models perform much better than the standard time-series models in terms of short-term forecasting accuracy. In particular, Google models show better out-of-sample forecasting performance than in-sample forecasting.     

CORS系统在上海市集体土地所有权调查项目中的应用

本文在详细介绍CORS系统的基本原理及分析其优势的基础上,将其应用于上海市集体土地所有权调查中,完成实测界址点和图形数据成果检查验收,充分发挥其精度高,速度快的优势,保证调查成果质量。     

Individual attitudes towards the impact of multinational corporations on local businesses: how important are individual characteristics and country-level traits?

We study the importance of individual characteristics and national factors influencing individual attitudes towards the impact of multinational corporations on local businesses. Our sample includes more than 40 000 respondents in 29 countries from the 2003 National Identity Survey conducted by the International Social Survey Programme. We find that individual demographic factors and socioeconomic status, such as gender, age, income and education, are strong predictors of their attitudes. For example, income and education are positively associated with favourable attitudes towards the impact of multinational corporations (MNCs) on local businesses while age is negatively associated with individual attitudes towards MNCs. In addition, hierarchical ordered logit model results show that approximately 8% of total variations in individual attitudes around our sample mean are not explained by differences in personal traits. Instead, they are due to country-level heterogeneity such as, but not limited to, different degrees of openness or different aggregate income.     

Slicing,Dicing, Spicing,and Pricing: Factors Influencing Purchase and Consumption of Fresh Potatoes

To better understand potential reasons for a North American decline in fresh potato consumption, a region-wide survey (n = 1009) was undertaken in eastern Canada. Results were examined comparing high- and low-frequency potato users on a variety of factors, including beliefs, attitudes, barriers, needs, and satisfaction with potatoes. Respondents indicated positive perceptions pertaining to potato nutrition, taste, preparation, and overall enjoyment. Multiple logistic regression analysis suggested two variables—age and the perceived importance of potatoes for the everyday meal—were strong predictors of high versus low frequency of potato consumption. Respondents judged the ability to see the potato in the package, potato firmness, and locally produced as point-of-purchase characteristics particularly important when buying fresh potatoes. However, respondents also indicated that their needs were not fully met and expressed relatively low levels of satisfaction when purchasing potatoes. Based on the results, suggestions are provided for improving the marketing of fresh potatoes.     

气象类高校毕业生就业工作状况跟踪调查——以南京信息工程大学2012届本科毕业生为例

本文以我校气象类2012届本科毕业生为例,通过设计毕业生、气象行业相关部门调查问卷,并采用电邮、邮寄、传真、网络、走访、座谈等形式,对我校气象类2012届本科毕业生进行跟踪调查,基于毕业生基本情况、工作情况、生活情况,对我校的意见和建议,通过文献分析、实践调查、交流研讨等,深入分析研究,旨在进一步分析目前气象类人才培养不足和探索新思维新理念而提供支持和服务。     

Cross-sectional surveys: Inferring total eventual time in current state using only elapsed time-to-date

We focus on snapshot surveying of sub-populations whose members are in a temporary state and where one of the questions asked is the elapsed time already spent in that state. From these answers we develop probabilistic and statistical procedures to estimate the distribution of total time that will eventually be spent in that state by any random individual who enters the state. The method relies on a selection bias often found in temporal sampling, sometimes called “random incidence” or “longevity bias.” We develop results for several types of sampling, including random and fixed times of surveying, random and fixed times of entering the state, and sampling only those who have already spent some minimal specified time in the targeted state. An example with post-doc data is included to demonstrate the steps.     

西安市林业高效复合经营模式与效益调查

通过对西安市近年来主要实施的林—油、林—菜、林—苗、林—禽、林—菌、林—药等林业高效复合经营模式及其效益进行深入调研和分析,确定了不同类型的林地宜采用的具体复合经营模式和不宜种植的作物种类,为今后实施林下复合经营提供了科学依据。     

浅谈校企合作对物联网专业建设的影响

随着近几年物联网的飞速发展,导致此方面人才奇缺。青岛农业大学以校企合作办学模式新增了物联网专业,以期为物联网的发展输送人才。本文阐述了校企合作办学模式在课程建设、师资建设、教材建设、实训和就业等方面给我校的物联网专业建设带来的积极影响以及对科研的促进。     

论高速铁路精密工程测量“三网合一”

客运专线铁路对测量精度要求较高,传统的分阶段布网方式和方法已不能满足现代高速铁路建设的需要。文章提出了＂三网合一＂的测量体系和布设原则及控制网的精度梯度等级,该体系的建立能统一高速铁路勘测控制网、施工控制网、运营维护控制网的起算基准和协调其精度,保证无碴轨道铁路工程的顺利实施。