公共自行车用车的借还车站点之间距离的一种解决方法

本文针对2013年全国大学生数学建模试题,温州市鹿城区公共自行车服务中心提供的20天借车和还车的原始数据,定义了两站点之间的距离,并求出最小距离和最大距离。     

大数据环境下公共自行车服务系统的综合评价

本文主要对浙江省温州市鹿城区公共自行车运行系统20天借还车原始数据进行统计,运用SPSS和EXCEL统计软件,对各类因素进行量化,将定性研究转换为定量研究。通过对收集数据的统计分析,发现公共自行车在人群密集区的站点,运行效率比较高,适用于短途出行,在工作日运行效率较高,用车高峰时段主要分布在上下班高峰时段及其附近。这些统计数据对于正确评价此系统的综合指标是有较大意义的。     

基于ID3改进算法的公共自行车服务系统优化研究

优化设置站点位置和锁桩的数量,直接影响了城市公共自行车服务系统的运行效率。ID3改进算法,是数据挖掘技术中应用最多的决策树生成算法,改进后的ID3算法大大提高了准确度和执行效率。文章阐述了运用ID3改进算法的数据挖掘技术,对已经部署公共自行车站点的区域进行分析,从而找到公共自行车系统的最优运行规律,同时,创建站点和锁桩的配置模型,为城市公共自行车系统高效运行提供有价值的参考。     

关于公共自行车服务系统的分析

环境问题一直是人们话题的重点,公共自行车作为一种绿色的出行方式正在迅速的推广、普及,自行车服务系统的运行并不是令市民很满意。主要针对公共自行车站点的系统设置和各站点自行车锁桩数量如何安排进行讨论,并建立相关的数学模型,进行相应的统计及优化。     

淮海工学院公共自行车智能管理系统方案设计研究

本文根据当前大学校园学生拥有及使用自行车的现状,立足于淮海工学院苍梧校区的实际,主要针对校园公共自行车智能管理系统的设计方案进行研究。通过对校外共享单车在淮海工学院苍梧校区附近的站点分布、车辆数量、学生对公共自行车需求分析以及淮海工学院公共自行车智能管理系统投入的成本费用和预期收益的分析,认为淮海工学院实施公共自行车智能管理系统具有明确的可行性。在此基础上,从淮海工学院公共自行车智能管理系统校内站点的选择、系统运行模式的设计、控制系统的开发设计等方面分析研究该系统的方案设计,构建了该系统的基本构架。     

温州发展城市公共自行车的可行性探讨

近几年来,随着私家车普及率的不断提升,市区早晚高峰的交通堵车状况愈演愈烈。在城市道路通行条件日渐严峻的今天,特别在温州市两会期间代表委员不约而同地提出了发展城市公共自行车,缓解城区高峰道路拥堵的顽症的议案。这些提案为城市管理者、公共服务部门带来了诸多思考,为了积极贯彻市委、市府提出的"三生融合、幸福温州"建设,本文就温州市区如何发展城市公共自行车租赁服务的可行性进行探索。     

杭州市公共自行车系统存在问题及发展建议

在考察了杭州市中心区、一般居民区的公共自行车站点分布和市民使用情况的基础上,对杭州市公共自行车系统实施效果进行评价,提出需完善站点设置、重视基础设施建设,使其更好地与公共交通相结合,完善管理程序,逐步、有序地实现自动运营,使城市交通走上安全、健康、和谐之路.     

基于深度信念网的公共自行车租赁单站点调度需求量研究

目前公共自行车租赁的合理调度对提高公共自行车的使用效率至关重要,其关键在于对未来公共自行车的需求量进行精准的预测.通过多层受限玻尔兹曼机来实现自主学习特征;然后再用学习好的特征来实现BP神经网络对单站点借车频次随时间分布的规律进行预测.实际需求曲线与预测曲线拟合良好,证明了本文提出的预测的方法有效可行.     

TOD模式下佛山市公共自行车系统运行现状调查与研究

从佛山市公共自行车的使用现状出发,结合佛山市交通运输局实施的TOD发展模式,通过典型代表地区的调查数据分析,梳理出佛山市公共自行车的使用特点。根据目前佛山市公共自行车运行系统存在的问题,提出"互联网+公共自行车"合理并存的建议及对策,从而优化公共自行车系统使其更好地为市民服务。最终为改善城市生态环境、提升城市形象方面起到推动作用。     

基于出行链的城市公共自行车服务模式研究

公共自行车采用开放性和共享性的服务模式,可实现自行车由传统个人交通工具向公共交通工具的转换。在快速机动化背景下,公共自行车"门到门"的出行特征能有效服务于多模式换乘出行链及多目的多模式混合出行链。根据出行链的链接特性及其与公共交通的接驳次序,归纳了四类适合公共自行车系统服务的出行链模式,研究了不同模式的出行链组合特征和用户需求特征,讨论了提升和改善公共自行车服务品质的具体措施。     

Incumplimiento del salario mínimo en Europa central y oriental

En este estudio se analiza el incumplimiento del salario mínimo durante el periodo 2003–2012 en diez países de Europa central y oriental con salario mínimo obligatorio nacional. A partir de los datos de EU‐SILC y la metodología propuesta por Bhorat, Kanbur y Mayet (2013), se cuantifica la incidencia y magnitud del incumplimiento. Se realizan análisis de regresión sobre determinantes individuales, laborales y macroeconómicos. Aunque la incidencia permanece relativamente baja, los trabajadores a los que se dirigen las políticas de salario mínimo parecen los más expuestos a su incumplimiento. Con el tiempo, una mayor incidencia se asocia a una razón más alta entre salario mínimo y salario medio.     

Cultural Economy Planning in Creative Cities: Discourse and Practice

While a growing body of research analyses the functional mechanisms of the cultural or creative economy, there has been little attention devoted to understanding how local governments translate this work into policy. Moreover, research in this vein focuses predominately on Richard Florida's creative class thesis rather than considering the wider body of work that may influence policy. This article seeks to develop a deeper understanding of how municipalities conceptualize and plan for the cultural economy through the lens of two cities held up as model ‘creative cities’ — Austin, Texas and Toronto, Ontario. The work pays particular attention to how the cities adopt and adapt leading theories, strategies and discourses of the cultural economy. While policy documents indicate that the cities embrace the creative city model, in practice agencies tend to adapt conventional economic development strategies for cultural economy activity and appropriate the language of the creative city for multiple purposes.     

Input/output ranges and performance: an examination of US machine tool producers

Despite the establishment of high-tech multinational enterprises (MNEs) in Ireland since the late 1950s, the country did not succeed in closing the technological gap with most of its EU counterparts. The weak National System of Innovation (NSI), and in particular low business and government R&D levels, combined with a lack of research and technology linkages between MNEs and indigenous firms, explain these poor results. However, the Shannon region in the West of the country presents some specific institutional characteristics that could theoretically make the region a strong technological enclave. The various actors in the region - i.e. the administrative, financial, political and research institutions, as well as the business organizations - have indeed infused a new type of economic development. After a brief review of the available concepts and models articulated around these actors and their interrelationships, the paper analyses whether the Shannon region, taken as an illustrative example, mirrors a specific economic and technological localized setting. The study is based on a survey of indigenous and foreign firms.     

Sixty years of discrimination and diversity research in human resource management: A review with suggestions for future research directions

This article reviews discrimination and diversity research published in Human Resource Management (HRM) over the past 60 years. While discrimination and diversity are very different constructs, it is often informative to study them together, because when people recognize each other's diversity, this can result in bias, stereotyping, and discrimination. We conducted bibliographic searches for terms related to discrimination and diversity as well as a manual search through every title and abstract published in HRM over the last 60 years to assess article relevance. The search resulted in 135 research articles with 136 unique studies (i.e., samples) which are reviewed in this article. Sex and race are the demographics that have been examined the most in HRM, while religion has been examined the least. Moreover, the number of studies examining lesbian, gay, bisexual, transgender, and queer (LGBTQ) employees in the workplace in HRM has grown quickly within the past 10 years, culminating in a recent meta‐analysis. Our review looks at some of the earliest research published, the most recent research published, and the overall trends we identified in the research over the years for both discrimination and diversity articles. We then make future research suggestions and recommendations to advance the study of discrimination and diversity in the coming years.     

The Early History of the Cumulants and the Gram-Charlier Series

The early history of the Gram-Charlier series is discussed from three points of view: (1) a generalization of Laplace's central limit theorem, (2) a least squares approximation to a continuous function by means of Chebyshev-Hermite polynomials, (3) a generalization of Gauss's normal distribution to a system of skew distributions. Thiele defined the cumulants in terms of the moments, first by a recursion formula and later by an expansion of the logarithm of the moment generating function. He devised a differential operator which adjusts any cumulant to a desired value. His little known 1899 paper in Danish on the properties of the cumulants is translated into English in the Appendix.     

Capturing the Implications of Services Trade Liberalization

This paper evaluates the impact of service sector trade liberalization on the world economy by a ten-region, eleven-sector CGE model with import embodied technology transfer from developed countries to developing countries. Simulation results show that service sector trade liberalization not only directly affects world service production and trade, but also has significant implications for other sectors in the economy. The major channel of the impact is through inter-industry input-output relations and TFP growth induced from services imported by developing countries from developed countries, which may be embodied with new information and advanced technology.     

City Children and Genderfied Neighbourhoods: The New Generation as Urban Regeneration Strategy

Former industrial cities in the West are employing gentrification as urban policy. In these policies, women and families currently play an important role as gentrification pioneers. In my analysis of Rotterdam in the Netherlands, I propose the term genderfication to understand the gender dimensions of this process. Genderfication refers to the production of space for different gender relations. I analyse Rotterdam's urban planning program for becoming a ‘child‐friendly city’, which entails replacing existing urban dwellings with new, larger and more expensive ‘family‐friendly homes’ as a strategy for urban re‐generation. Urban re‐generation supplements regeneration in the form of material and economic restructuring, and refers to the replacement of part of the current population by a new and better suited generation. The ‘child‐friendly city program’ is considered in tandem with punitive ‘youth policies’.     

Hierarchical Models in Environmental Science

Environmental systems are complicated. They include very intricate spatio-temporal processes, interacting on a wide variety of scales. There is increasingly vast amounts of data for such processes from geographical information systems, remote sensing platforms, monitoring networks, and computer models. In addition, often there is a great variety of scientific knowledge available for such systems, from partial differential equations based on first principles to panel surveys. It is argued that it is not generally adequate to consider such processes from a joint perspective. Instead, the processes often must be considered as a coherently linked system of conditional models. This paper provides a brief overview of hierarchical approaches applied to environmental processes. The key elements of such models can be considered in three general stages, the data stage, process stage, and parameter stage. In each stage, complicated dependence structure is mitigated by conditioning. For example, the data stage can incorporate measurement errors as well as multiple datasets with varying supports. The process and parameter stages can allow spatial and spatio-temporal processes as well as the direct inclusion of scientific knowledge. The paper concludes with a discussion of some outstanding problems in hierarchical modelling of environmental systems, including the need for new collaboration approaches.