The puzzle of greenhouse gas footprints of oil abundance

The present inquiry lays a groundwork for the analysis of the net greenhouse gas (GHG) footprint of oil in the oil-abundant settings. To address the research question, the study puts forward a three-sector decision model, which provides a common ground for the assessment of the interaction of the structuralist and institutional factors influencing environmental pollution in the oil-reliant economies. The study shows that fossil-fuel abundance triggers forces, which induce diametrically opposed effects concerning atmospheric pollution. These are the rising carbon-intensive oil extraction and processing and fossil-fueled power generation versus shrinkage of the carbon-intensive manufacturing and growth of the low-carbon tertiarization. The theoretical analysis enables compartmentalization of the essential factors, which determine GHG emissions in the respective countries. To assess the significance of the proposed theoretical framework, the study employs multivariate panel co-integration techniques and two-stage fixed effects estimations for a dataset of 38 oil-producing countries for the time period between 1960 and 2018. In contrast to the existing literature, this study drives apart from the black box approaches that employ just one omnibus variable, per capita income.     

探析C2C电子商务物流新模式

针对现在C2C电子商务发展的迅猛势头,分析了目前存在于其中的物流问题。通过整合社会和第三方物流公司资源,结合C2C平台自身的优势,对如何解决C2C电子商务物流的问题提出一定的建议和意见。探析了建立自营模式、物流联盟模式、指定或推荐物流模式和基于便利店支持下的电子商务物流模式的可行性。从而解决困扰电子商务交易中的物流瓶颈问题。     

中国CO_2排放增长的结构分解分析

文章采用投入产出和结构分解分析,定量分析了我国CO2排放增长的影响因素。结果表明,促进我国CO2排放增长主要因素是规模效应和结构效应,而起到抑制作用的因素只有效率效应。从最终需求角度看,资本投资和城市居民消费增加是CO2排放增长的两大主要来源,农村居民、政府消费和净出口的影响相对较小。从部门来看,机械设备制造业、旅客运输等服务业以及建筑业是CO2排放增长的三大部门。最后,针对实证结果提出了节能减排的政策建议。     

C2C顾客忠诚度影响因素分析及对策

在C2C电子商务环境下,电子商店之间的竞争越来越激烈,顾客忠诚度尤为重要,是电子商店谋求长期发展的保证。本文分析了C2C时代消费者特征和影响C2C顾客忠诚度的因素,并提出了提升顾客忠诚度的相关建议。     

A simple model of brain circulation

This paper analyzes the allocation of two types of individuals differentiated by talent between two countries where they choose to be workers or entrepreneurs. An equilibrium with international migration exists when countries' talent endowments are sufficiently different. It is consistent with one-way or two-way migration whether individuals are entrepreneurs or workers. Although allowing migration increases domestic welfare in one country and decreases it in the other, it is always supported by majority voting in both countries.     

Employee brand engagement on social media: Managing optimism and commonality

This article considers how employees engage with B2B firms on social media, a topic that is largely overlooked in the extant brand engagement literature. Using the results from a large-scale study of employee brand engagement on social media, we identify two key drivers of employee brand engagement using the content analysis tool DICTION—namely, optimism and commonality. Employees of top-ranked and -rated firms express higher levels of optimism and commonality in their reviews of their employers on social media than do their counterparts in bottom-ranked and -rated firms. This permits the construction of a 2 × 2 matrix that allows managers to diagnose strategies for increasing or improving employee brand engagement. This creates four different kinds of employee brand engagement situations, and offers human resources and marketing managers different strategies in each case. We demonstrate how practitioners and scholars can shed new light on the way stakeholders engage with brands.     

Consistency and Recovery in Retail Supply Chains

Practitioners and researchers describe inventory service level with metrics that communicate the likelihood of demand fulfillment without considering the ongoing capabilities of the supplier, for example, in‐stock and fill rate. We develop a method for measuring inventory service level that incorporates such supplier capabilities, namely consistency (the ability of a supplier to fulfill orders repeatedly) and recovery (the ability of a supplier to fulfill orders after a lapse in service). Using data from two retail supply chains, we illustrate our approach. To demonstrate the impact of consistency and recovery on supply chain performance, we model a retailer purchasing from competing suppliers with different levels of consistency and recovery. The model incorporates the retailer's uncertainty about demand and the retailer's uncertainty about its suppliers' service levels. We characterize how the retailer's orders and profitability change with a supplier's delivery performance through numerical experiments calibrated with field data. We find notable differences in market share across suppliers with similar traditional inventory service level metrics but differences in consistency and recovery. Further, we observe that a retailer can increase its profitability by determining orders via consistency and recovery in lieu of common metrics like in‐stock. Given the influence of consistency and recovery on supply chain outcomes, we discuss implications for practice and future research.     

基于用户中断概率的D2D通信干扰协调与资源分配

在LTE系统中引入设备直传（D2D）通信技术,会因为D2D用户复用蜂窝用户资源进行通信而产生同频干扰。在现有的干扰协调与资源分配研究中,都需要基站获取各个通信链路的信道状态信息（CSI）,但这样无疑会增加基站的信令负担。为减小干扰与基站的信令负担,提出了一种基于用户中断概率的干扰协调与资源分配算法,首先在保证蜂窝用户正常通信的情况下,通过限制D2D用户到基站间的距离来降低干扰;其次通过遍历所有蜂窝用户的频谱资源,选择能使D2D用户的总中断概率最低的频谱资源进行复用。仿真结果表明,所提算法能够在保证蜂窝用户正常通信的情况下,明显降低D2D用户的平均中断概率,同时还能够降低基站信令负担。     

D2D通信中基于社交门限的最优中继选择方案

在基于设备直传(D2D) 通信的中继系统中,提出了一种基于社交感知的增强型中继选择策略。该策略首先在D2D中继网络中引入社交门限值,对潜在中继用户进行筛选和过滤,从而有效降低了探测成本;然后利用最优停止理论实现了最优中继节点的选择。仿真结果表明,与已有中继选择策略相比,所提出的策略能够以较少的中继探测次数获得较高的系统性能收益,从而实现能耗与收益之间的折中。     

基于J2EE的企业应用集成技术的研究与应用

企业应用集成就是保留原有的系统,将进程、软件、标准等联合起来,并在一个大型集成平台上把两个或更多的企业应用系统实现无缝的集成,从而使得企业内部实现高度的信息共享,文章就基于J2EE的企业应用集成技术的研究与分析。