Internet上的网络营销

信息时代,计算机网络迅猛发展,网络营销给企业带来了新的机遇。企业应抓住机遇,采用恰当的营销策略,开展网络营销,寻求发展。     

网络公司的经济源泉及资产价值评估

网络经济的价值源自直接经济、注意力经济以及规模经济,因此对网络公司的评价已大大的不同于对传统的实体业务的评估。为此,应通过借鉴国外网络公司估价模型,分析网络公司的价值增长模式,提出对国内网络公司的价值评估应区分不同阶段分别采用模糊综合评价法、单项加总法以及收益现值法来评估。     

Short‐Term Wind Speed Forecasting for Power System Operations

The emphasis on renewable energy and concerns about the environment have led to large‐scale wind energy penetration worldwide. However, there are also significant challenges associated with the use of wind energy due to the intermittent and unstable nature of wind. High‐quality short‐term wind speed forecasting is critical to reliable and secure power system operations. This article begins with an overview of the current status of worldwide wind power developments and future trends. It then reviews some statistical short‐term wind speed forecasting models, including traditional time series approaches and more advanced space–time statistical models. It also discusses the evaluation of forecast accuracy, in particular, the need for realistic loss functions. New challenges in wind speed forecasting regarding ramp events and offshore wind farms are also presented.     

Can competition-enhancing regulation bridge the quality divide in Internet provision?

About 3.5 billion individuals, half of the world's population, were estimated to be using the Internet in 2017. However, their ability to use services such as cloud computing, VoIP, media streaming, high-frequency trading, network gaming, video conferencing and telemedicine, are sensitive to the network quality of service (QoS). We examine the effects of pro-competition regulation on Internet QoS - a measure of digital divide - using 23 indicators of competition from a panel of 160 countries covering 2008–2016. We find that pro-competition regulations had a stronger positive effect on QoS in developed countries compared to developing ones. A one-point increase in the pro-competition score increases QoS, measured as average connection speed, by at least 200 kbps in developed countries. Our results control for supply and demand factors, as well as country-fixed effects. The results are also robust to different measures of average connection speed. We attribute this variation to difficulties in the contracting environment in developed and developing countries, consistent with Levy and Spiller (1996). Countries with better institutional endowments – associated with developed economies - are better able to design and enforce complex regulatory contracts compared to developing countries. Ironically, this means that more pro-competition rules on paper will not necessarily narrow the digital divide between developed and developing countries and that there is a need to consider minimum quality standards as a means to effect improved Internet QoS.     

绿色加工技术中刀具问题的研究

本文对绿色加工技术中刀具问题进行了探讨,从三个方面介绍了目前高速干切削加工工艺下刀具问题的研究思路,并对三种思路进行评价。     

物联网条件下的公共安全管理

物联网是互联网由人向物的延伸,它扩大了网络连接对象,丰富了智能管理内涵,拓展了信息传输渠道,实现了人与人、计算机、物品的多维互动。物联网在公共安全管理领域的应用日渐广泛,在提升安全管理水平的同时,也对公共安全秩序提出了严峻挑战。各级政府应当牢固确立自身在物联网开发应用中的主导地位,抓紧从整体上构建适应物联网时代要求的高度智能、重在预防的公共安全防控体系,主要包括事故监测防范、城市综合管理、身份识别控制等系统。     

The international policies of brain gain: A review

Policymakers across OECD countries have become increasingly concerned with the national and international debate about brain drain and have launched appraisal processes of the situations in their respective countries. The debates took different turns in different countries, but nevertheless, some common issues cut across a number of countries. The issues of academic structures and traditions, legislation and management, and reputation and image have surfaced as critical factors for brain drain and brain gain. In this paper I provide a systematic analysis of the international policy debates surrounding the issue of brain drain and brain gain and make an attempt to distinguish between them by classifying them into different categories.     

变频电机车的应用

文章由矿用直流架线式电机车存在问题入手,基于变频调速的方向探讨电机车的改造方案,再将直流电阻调速电机车与交流牵引变频调速电机车作对比,凸显变频调速电机车的性能及优势,为变频电机车在矿井作业中的应用打下良好的理论基础。     

瞬态面波法在伊东工业园供水工程勘察中的应用

岩土工程包括的基本内容有:岩土工程勘察、岩土工程设计、岩土工程治理、岩土工程监测等方面。随着国民经济的发展,科学技术的不断进步,物探这门科学技术在岩土工程的勘察、治理等方面发挥了应有的作用。瞬态面波勘探就是物探技术中的一种。它可以快速和经济地测定岩土层的厚度及面波速度,并可换算成横波速度。本文介绍了它的原理和野外试验方法。并以实例说明了此方法的有效性。最后对这一方法的优点作了讨论。     

河南城镇化发展速度与质量问题探析

文章在分析河南城镇化发展状况的基础上,以河南城镇化发展速度和质量存在的问题为切入点,研究如何加快河南城镇化进程以及提高河南城镇化发展质量的方法和途径,使河南城镇化发展质量与速度相协调,推动其向深层次发展,实现河南城镇化健康发展。