市域(郊)铁路车辆选型方案探讨

随着城镇化进程的加快和城市经济辐射能力的增强,以特大城市中心城为核心的都市圈逐渐形成,都市圈内的经济联系更加紧密,都市圈核心区与外围的出行需求迅速增长,市域(郊)铁路的概念被引进,选择符合市域(郊)铁路特点的车辆类型是设计的重点。     

基于OID编码体系的汽车电子标识编码应用研究

本文为了解决物联网所连接对象的多样性带来的标识体系存在不兼容、相互矛盾的问题，基于车联网RFID汽车电子标识的使用特点，创造性地提出将OID编码和汽车电子标识编码相结合的方案。首先简单介绍了基于发证机构及时间和基于汽车VIN码的两种OID编码规则；然后提出了OID编码在汽车电子标识芯片中的规划，主要是内存分配方案；最后介绍了相应区域的读写操作的具体方法。     

旅游管理专业人才培养模式构建与实施效果评估

旅游管理专业“四轮驱动型”人才培养模式是为了顺应我国目前旅游业快速发展对旅游专业人才素质提升的需求提出的。本文建构了“四轮驱动型”人才培养模式体系,以湖北大学旅游管理专业为例提出了“四轮驱动型”人才培养模式的实施方案,并对该模式进行了评估。     

不同调制方式下高斯信道容量的计算

计算不同调制方式下的信道容量对实际通信系统的信道编译码设计具有重要的理论意义。首先从Shannon信息论出发,介绍了平稳无记忆连续信道与加性白高斯噪声信道容量的定义。接着利用互信息与微分熵的相互关系,推导了几种常用的不同调制方式下高斯信道的容量,并给出了相应的信道容量闭合计算表达式。通过将电力卫星通信信道模拟为高斯信道,对采用无速率信道编码联合不同调制方式的卫星通信进行了数值仿真。仿真结果显示,通过推导得到的闭合表达式计算信道容量,能对实际卫星通信的编码速率、译码启动条件的确定起到很好的理论指导作用。     

指派问题的改进算法

指派问题是管理技术中的重要内容,指派问题的经典算法就是经典的匈牙利法。针对匈牙利法在处理有诸多指派问题的模型不能进行有效求解的情形,本文提出了匈牙利法的改进算法,并应用改进算法在人员任务分派等实例中进行了有效的求解,得到了优化分配的方案,说明模型算法的有效性和实用性。     

VCR法采场破顶方案在冬瓜山铜矿的应用和优化

针对VCR采矿法在采场破顶过程中出现的问题进行了分析,提出了调整采场破顶传爆方案,并在现场多个采场进行了试验。结果证明,调整后的破顶传爆方案成功达到了爆破设计的100%破顶范围,大大降低了破顶后的找孔劳动强度,减少了导爆索的用量,提高了施工人员的作业安全系数。     

一种快速时变自适应信道估计盲方法

提出了一种新的信道估计最小均方(LMS)盲方法--时变步长理想加权判决信道估计盲方法.该方法通过对常规LMS算法进行改进,实现自适应跟踪信道特征变化;同时利用接收机判决误差信息函数作为权系数的理想加权判决,从而解决了常规LMS盲方法收敛速度慢、信道估计性能不高的缺点.仿真证明,对于不同的多普勒频移、时延扩展以及时间,该方法均表现出了比常规LMS方法更优的性能.同时,该方法还可用于航天、雷达等领域估计其他特征参数.     

Does the Eco‐Management and Audit Scheme Foster Innovation in European Firms?

This paper studies whether environmental management systems can spur eco‐innovation, analyzing EMAS (Eco‐Management and Audit Scheme) adoption and patented innovations (at the European Patent Office) at firm level. It uses an original panel database of 30 439 European firms belonging to all sectors from 2003 to 2012. An original instrumental variable is implemented to control for potential endogeneity. The analysis reveals that EMAS adoption is conducive to more innovation at the firm level. The results vary across countries and sectors. In particular, EMAS is positively related to green patents for medium and low technology manufacturing. Copyright © 2017 John Wiley & Sons, Ltd and ERP Environment     

A study of farmer’s decision and incentive scheme to reduce highland maize farming in Thailand

During the past 15 years, there has been a considerable increase in highland maize farming in Nan, a province in northern Thailand. The increase in farming area causes an excessive forest encroachment and environmental problems, e.g. soil degradation, landslide, and pesticide contamination. This research explores the mechanism and factors which drive a sustainable transformation from highland maize farming to reforestation. We survey 107 farmers in Nammeed and Sopsai watersheds in where the reverses of growing trend of deforestation in Thailand have been observed. Comparative statistical analysis and regression are used to analyse factors affecting farmer’s decisions and compare differences between the two sites. We find that the fundamental mechanism driving a sustainable transformation from highland maize farming to reforestation comprises 3 pillars. These are 1) realization of adequate economic, health or environmental benefits derived from the alternatives; 2) a sense of belonging and attachment towards the forest and 3) effective enforcements of communal rules and regulations. While natural transformation in Nammeed area highlights the roles of flatland as key driver of the change, subsidy schemes can supplement the transformation during transitional period as seen in Sopsai area.