能源互联网在我国的发展趋势和商业机会分析

能源互联网是第三次工业革命的代表性产物,是人类历史发展的必然结果,也是我国能源的重要战略发展方向。通过对能源互联网的分析,结合我国能源互联网技术和产业现状总结出未来能源互联网产业发展趋势,并展望我国能源互联网的商业机会。我国能源互联网的趋势包括：天然气分布式能源、分布式光伏、能源互联网大数据、纯电动汽车等。由此分析得出我国能源互联网三大主要商业机会：大数据能源服务产业、分布式能源互联网产业和新能源汽车产业。     

Interest rate liberalization and pass-through of monetary policy rate to bank lending rates in China

We examine whether the effectiveness of the monetary policy rate transmission differs before and after interest rate liberalization in China using the autoregressive distributed lag (ARDL) bound test and an error correction model (ECM). The results show that after liberalization the mark-up is lower, and both the long-run and shortrun interest rate pass-through has become faster and more complete. We attribute our findings to the ongoing reforms of China’s banking system, which has improved the competitiveness of Chinese commercial banks.     

Oracle数据库的安全性讨论

数据库的安全性是 Oracle的一个重要特点 ,本文对 Oracle数据库的安全机制做了介绍 ,并对 Oracle数据库中的用户、口令、权限管理、审计和备份恢复等功能进行了详细的描述和讨论。     

基于数据融合的分布式入侵检测系统研究

针对分布式入侵检测在当今网络安全中发挥着越来越重要的角色,将数据融合技术引入到入侵检测系统中,提出了基于数据融合的分布式入侵检测系统设计方案,描述了分布式检测和决策融合的结构设计,讨论了数据融合决策问题的数学模型,运用理论推理论证了融合决策处理的可靠性。分析比对实验表明,该系统降低了入侵检测系统的虚警率,提高了检测率。     

The Contractionary Short‐Run Effects of Nominal Devaluation in Developing Countries: Some Neglected Nuances

This article extends the model developed by Krugman and Taylor (1978 Krugman, P. and Taylor, L. 1978. Contractionary effects of devaluation. Journal of International Economics, : 445–56. [Crossref], [Web of Science ®] [Google Scholar]) to take into account interesting features of the evolving structure of global trade. The growing presence of transnational production chains and differential pricing behaviour of exports destined for industrial and developing countries are accommodated. Individual country and panel data pass‐through estimates derived from several econometric approaches are provided to justify the latter extension. The likelihood of contractionary short‐run effects of devaluations is shown to be positively related to: 1) the proportion of a country’s exports destined for other developing countries; and 2) the presence of transnational corporations (TNCs) in either the export or home goods‐producing sector. Unlike the Krugman‐Taylor case, devaluation will generally have a contractionary impact even if: 1) trade is initially balanced; 2) consumption behaviour does not differ between wage and profit earners; and 3) the government sector has a high marginal propensity to consume in the short run. The resulting policy implications underline the need to take into account these increasingly important nuances of international trade while designing exchange rate policies for developing countries.     

一种基于TDMA的Ad Hoc网络的虚电路建立协议

为了实现网络中端到端的可靠传输,在基于TDMA的Ad Hoc网络里引入一种虚电路建立协议.该协议采用分布式的资源预约方式建立虚电路,对于网络拓扑变化所引起的链路故障,能够及时发现和处理,且具有相对较小的开销和较高的可靠性,比较适合Ad Hoc网络.     

A novel ring protection switching mechanism

环网保护是ITU-T和IETF联合工作组正在研究的多协议标签交换传送应用（MPLS-TP）关键技术之一。在研究现有的环网保护方案的基础上,提出了一种新颖的快速“Wrapping”环网保护倒换机制以及对应的分布式实现方式。运用这种快速的“Wrapping”环网保护倒换机制及其对应的分布式实现方式,可以降低在保护倒换中数据的丢失率。同时,分布式实现方式易于增加保护组容量,简化网络管理操作,增强设备可靠性。     

Interstate switched access demand analysis

The breakup of the Bell System in 1984 led to the adoption by the Federal Communications Commission of a system of tariff charges that are paid to local exchange carriers by business and residential telephone subscribers, and interexchange carriers such as AT&T. These charges are designed to recover the costs associated with providing access to the public switched network to complete interstate calls. This system is known as the FCC Access Charge Plan. Flat-rate fees, named Subscriber Line Charges, are imposed on telephone subscribers, while usage-based charges are billed to interexchange carriers. These are called Carrier Common Line and Traffic Sensitive rates. Since CCL and TS rates are based on network usage, forecasts of switched access demand are required to set them properly.This paper presents an econometric model of interstate switched access demand developed and utilized by AT&T to produce forecasts of 1988 demand in connection with the Annual 1988 Access Tariff Filings. The model is estimated in a state-level pooled cross-sectional time-series framework, with dynamics introduced via polynomial distributed lags on price and income. It represents an extension of the econometric demand model developed and used by the FCC a year earlier to determine a reasonable forecast of 1987 Carrier Common Line switched access demand. Estimated demand elasticities and forecasts are provided. The model forecasts are also compared to those from other models.     

基于时频相关性的复合常规人为干扰分析方法

在军事无线通信中,对进入接收机的干扰信号进行分析、识别并提取特征参数,以支持抗干扰决策,是通信设备有效对抗蓄意人为干扰的前提。提出了基于短时傅里叶变换(STFT)的复合常规人为干扰分析方法,首先对接收的干扰信号进行STFT变换,然后将得到的三维时频域数据进行二值化处理;最后根据不同干扰样式的时域及频域特征,对二值化的时频域数据之间的关系进行分析,分别解析出多音干扰、周期脉冲干扰、扫频干扰。理论分析和仿真结果表明,通过分类搜索算法,能够较为准确地对复合人为干扰进行解析。     

分布式电源大量接入对配电网可靠性评估的影响

分析了分布式电源（DG）大量接入对配电网可靠性评估指标体系、可靠性评估模型、评估方法及可靠性与经济性协调等方面的影响。分析表明,含DG的配电网可靠性评估是个整体体系,所涉及的各方面的影响因素相互制约,又相互联系,研究DG对配电网可靠性评估的影响具有重要意义。