单频网多播系统中的开环半动态功率分配算法

在单频网多播传输中,传统的全反馈动态功率分配数算法需要根据每个时隙反馈的用户瞬时信道信息进行实时的调整,所以造成了资源分配频率快、上行反馈开销大的缺点。为了克服这个缺点,提出了一个低复杂度、没有用户反馈的单频网多播开环半动态功率分配算法。首先在各小区等功率分配的假设下,根据单频网的形状信息算出各小区等价信道增益,然后再根据这个增益值,实现满足速率需求情况下的各小区功率分配。仿真结果显示,与全反馈的动态功率分配算法相比,该算法以一小部分性能损失为代价,大大减少了单频网的上行反馈和资源分配的开销,因此更适用于实际的单频网多播系统。     

Excise Tax Harmonisation in Australia at Federation

Constitutional changes at the time of Federation in Australia required the harmonisation of the excise tax rates of the former Colonies. This paper outlines the excise tax systems of the Colonies before Federation and that of the Commonwealth after Federation. Estimates are made of the consumer tax equivalent rates and of the implicit rates of protection in each Colony and in the Commonwealth after Federation. The Commonwealth Government harmonised the excise tax rates of the Colonies at about the mid‐points of the rates of the Colonies but the implicit rates of protection increased after Federation.     

How to price the unbundled local loop in the transition from copper to fiber access networks?

In many countries worldwide access networks are in the transition from copper to fiber access. During the transition phase copper and fiber networks are operated in parallel. All regulators facing this situation of technological change have to decide how to price unbundled access to the copper loop in this transition phase. Should they keep the usual forward looking long-run incremental cost standard charge, or should they move to some different approach? The authors propose to price copper access based on the modern equivalent asset (MEA) of fiber access. Since fiber access is superior to copper access, the cost of fiber access (as a basis for pricing copper access) should, however, be corrected by the performance delta between copper and fiber access.     

同轴均衡器等效电路模型研究

建立了同轴均衡器单子结构的等效电路模型,从理论上解释了均衡器单子结构谐振腔 的最大衰减量及谐振频率的变化规律。根据等效电路分析知：当探针插入深度增加时,谐振 频率变 低,衰减幅度变大;当腔长变长,谐振频率变低,衰减变小。计算机仿真结果和调试情况证 明了等效电路的正确性。     

透视国际趋同背景下的欧盟等效会计标准认可

欧盟坚持等效的理念并积极推行"等效会计标准"认可,是基于自身利益考虑和会计准则国际趋同的实际情况做出的理性选择.欧盟已经把美国、日本和加拿大三国列作等效会计标准候选国.我国内地与香港会计准则实现等效有利于今后与欧盟、美国等国家和地区开展会计准则等效工作.我国应坚持"趋同是第一步,等效才是目标"的理念,积极推进我国会计准则国际等效,并力争早日成为欧盟的第四个等效标准候选国家.     

地震作用下框架填充墙结构的有限元分析

框架填充墙结构在地震作用中受到的破坏最为严重,亟需提出针对该类结构合理有效的分析和计算模型。文章中,对一幢纵横向均为三跨的五层框架填充墙结构采用SAP2000结构分析软件进行有限元分析,先后按实际填充墙布置建模、以及按照等效斜撑布置建模,对比规范规定的采用0.7的周期折减系数的分析方法。验证了规范中所采用的周期折减系数是严重低估填充墙对框架结构刚度的影响的,在设计中将导致严重安全隐患。并同时提出了更为简便、且满足工程要求的等效斜撑截面面积计算方法,建议在框架填充墙结构的相关分析和设计中采用此方法。     

绝缘油耐压测定仪在变压器油击穿电压试验中的应用

通过用绝缘油耐压试验仪对变压器油击穿电压的测定试验,分析了测定过程中出现的异常现象及测定值产生误差的原因。     

X频段介质谐振振荡器的设计

介绍一种适合X频段并联反馈型介质谐振振荡器的设计方法及其相关理论,采用计算机仿真技术分析影响振荡器相位噪声的一些因素,并设计了一个X频段的并联反馈型介质谐振振荡器,验证了采用减小介质谐振器耦合的方法来改善输出相位噪声的可行性。     

机场噪声预测与计算

采用计权等效连续感觉噪声级LWECPN作为机场噪声评价参数,具体结合机场及周围地区的地形、航班、机种及飞机起降航迹等计算并绘出机场周围地区的等声级噪声暴露图。     

On the need to compensate the compensating variation in CGE modeling

The message of this research is that in the standard calibrated setting of Computational General Equilibrium (CGE) models, the welfare measures typically used to compare benchmark with counterfactuals are numéraire dependent. This evaluation bias affects the compensating variation and the Konüs index of cost of living. We show that the equivalent variation is neutral regarding the choice of value units in calibrated models but would be affected as well in uncalibrated CGE models. We illustrate with a simple example and propose an even simpler theoretical solution to overcome these biases; all that is required to have correct welfare estimates is to compensate normalizing with a suitable price index. This type of correction is necessary to overcome the sometimes blind implementation of welfare measures in numerical general equilibrium analysis. We show that the induced quantitative errors may be substantial providing biased welfare estimates and misleading results.