可再生能源配额制与碳排放权交易并行实施的政策效果

中国将同时实施可再生能源配额制与碳排放权交易,并以售电商为配额制的考核主体。本文建立两级供应链模型分析两者相互作用的政策效果。研究结果表明,引入碳排放权交易将导致火电价格上涨与可再生能源电力价格下降,有利于实现两者在同一价格水平竞争。然而,碳排放权交易亦将造成零售电价上涨,电力需求减少,且变化幅度与碳排放权价格和减排成本成正比。若配额比例与售电商差异性提高,在不影响环境成本内化于火电批发价格的同时,可降低售电商的转嫁成本。从而减小了可再生能源电力价格降幅与零售电价涨幅,并平抑碳排放权价格与减排成本上涨造成的电价与需求波动。     

一种基于HTTP的Internet文件存储系统的设计和实现

利用网络进行文件管理，尤其是利用范围最广的Internet网络进行存储管理，能极大地方便和满足用户文件存储管理的需要．论述了一种基于HTTP的Internet文件存储系统的设计和实现．     

Path Capacity Dimensioning in a Multiprotocol Label Switched Network: Analysis of Optimal and Suboptimal Solutions

In recent years, the problem of capacity allocation for a label switched patch (LSP) in a multiprotocol label switched (MPLS) network has received great attention due to its relevance in the context of traffic control. In this paper, the problem of capacity allocation is formulated as an optimal control problem and its solution is obtained by assuming the knowledge of the bandwidth requests on the entire control interval. A suboptimal solution is also given which has the advantage of requiring limited information about future bandwidth requests. The analysis of the suboptimal solution is explored both analytically and numerically by using simulated and real data. This study demonstrates that the suboptimal solution, also with limited knowledge of the future, yields a good approximation of the optimal one and requires little additional cost.     

Equilibrium charges of multi-period allocation mechanisms for network services

Several new network services require a periodical resource allocation. For this purpose several auction-based multi-period allocation mechanisms have been proposed. This article derives explicitly resulting equilibrium charges in a simple mathematical model, i.e., constant session holding times, identical bandwidth request and independently identically uniformly distributed bids for the multi-period VCG and the PRENORM mechanism. In the same manner the expected revenue of the network provider can be calculated. Moreover, the analysis leads to an important condition for the protection parameter α of the PRENORM mechanism, such that the charging system does not break down. This research was partly financed by the Austrian Science Fund under contract number P18161-N13 (“Control of heterogenous systems”).     

基于物联网的涉密设备出入管控系统设计

针对涉密设备安全管理与监控的需要,提出一种全面、连续、实时的监控一定区域内涉密设备出入安全管理的解决方案。主要思想是基于物联网技术,采用有源射频识别（RFID）方法设计和开发了一套涉密设备出入管理系统;首先介绍了系统的总体结构和功能,然后详细描述了涉密设备出入管理系统的软硬件设计方法和系统管理流程,最后给出了新增涉密设备、设备正常带出、设备非法带出、设备报废的系统主要流程的测试结果;测试结果表明系统能够实现所设计的各项功能并具有运行稳定、可扩展性强、可维护性好的特点。     

基于物联网的水质在线监测系统设计与实现

针对以往水质监控系统水质传感器数据采集盲区多,传统处理器、通信模块无法满足大量的数据的处理和传输等问题。设计并实现了一种基于物联网技术的水质在线监测系统。该系统由数据采集节点、数据汇聚节点与监测中心计算机构成。设计了以INA118仪用放大器为核心的微弱信号调理电路,通过STM32微处理器进行实时数据采集和处理,结合ZigBee低速短距离和CDMA2000高速远距离通信等物联网技术将水质数据上传至物联网云平台。监测中心计算机通过下载物联网云平台数据实时显示。通过测量数据的对比性实验,结果表明整个系统的实时性好、测量精度较高,温度,pH值和电导率的平均相对误差分别约为0.64%,1.33%和2.33%,能够较好地满足水质监测的要求。     

互联网及其数学模型与比较

简介了互联网的现状和结构以及互联网数学建模的历史和现状,并且实证比较了一些代表性网络模型的结构参数与功能表现。     

A dynamic mathematical test of international property securities bubbles and crashes

This study investigates property securities bubbles and crashes by using a dynamic mathematical methodology developed from the previous research (Watanabe et al. 2007a, b [31] and [32]). The improved model is used to detect the bubble and crash periods in five international countries/cities (namely, United States, United Kingdom, Japan, Hong Kong and Singapore) from Jan, 2000 to Oct, 2008. By this model definition, we are able to detect the beginning of each bubble period even before it bursts. Meanwhile, the empirical results show that most of property securities markets experienced bubble periods between 2003 and 2007, and crashes happened in Apr 2008 triggered by the Subprime Mortgage Crisis of US. In contrast, Japan suffered the shortest bubble period and no evidence has documented the existence of crash there.