小波模极大值法在地震解释图像边缘检测中的应用

边缘作为图像的最主要特征,是图像视觉信息获取的重要内容。小波变换具有检测信号局域突变的能力,且可以结合多尺度信息进行检测,因此成为图像边缘检测的优良工具。基于信号与噪声在不同尺度下小波系数模的变化特征,可以通过检测小波变换系数模局部极大值点来提取图像的边缘特征。实际课题中将小波模极大值法应用于三维地震资料——相干切片图像的边缘检测中,证实了该方法能较准确地提取断层边缘,为下一步对断层的提取及解释提供有力保障。     

农村税费改革后县乡财力困难的解决对策

当前实施的农村税费改革取得了一定的成效，但也带来县乡两级政权财力资金困难问题。解决这一问题主要从以下三方面入手：一是精简机构，压缩行政管理支出；二是完善分税制，建立稳固的地方税收来源；三是完善地方政府的转移支付制度。     

The ideal source of local public revenue

Free or underpriced curb parking creates a classic commons problem. Studies have found that between 8% and 74% of cars in congested traffic were cruising in search of curb parking, and that the average time to find a curb space ranged between 3 and 14 min. Cities can eliminate the economic incentive to cruise by charging market-clearing prices for curb parking spaces. Market-priced curb parking can yield between 5% and 8% of the total land rent in a city, and in some neighborhoods can yield more revenue than the property tax.     

OTL电路最大不失真功率计算误差的研究及修正

本文分析了复合互补 OTL 电路最大不失真输出功率的计算误差、误差产生的原因,提出了计算误差的修正系数并推导了计算公式。还定量分析了复合管的饱和压降。     

局部相参性及其以局部相参雷达动显能力的影响

本文从局部相参雷达原理性框图出发,分析了局部相参雷达核心部件相参振荡器的工作过程、局部相参的具体含意。探讨了影响局部相参性的一些主要因素及其对动显的影响,以及改善局部相参性的可能途径。     

Likelihood Inference for Gibbs Processes in the Analysis of Spatial Point Patterns*

Several authors have proposed stochastic and non‐stochastic approximations to the maximum likelihood estimate (MLE) for Gibbs point processes in modelling spatial point patterns with pairwise interactions. The approximations are necessary because of the difficulty of evaluating the normalizing constant. In this paper, we first provide a review of methods which yield crude approximations to the MLE. We also review methods based on Markov chain Monte Carlo techniques for which exact MLE has become feasible. We then present a comparative simulation study of the performance of such methods of estimation based on two simulation techniques, the Gibbs sampler and the Metropolis‐Hastings algorithm, carried out for the Strauss model.     

一种新的MIMO无线通信空时分组码方案

从MIMO(多入多出)引出空时分组码背景;针对实际MIMO应用提出了一种利用广义复正交方法新设计的满分集的码率为1/2的6个发射天线4个接收天线(6×4)和8个发射天线4个接收天线(8×4)结构的空时分组码系统,仿真结果表明该系统具有良好性能。     

Bivariate generalized Poisson distribution with some applications

The univariate generalized Poisson probability model has many applications in various areas such as engineering, manufacturing, survival analysis, genetic, shunting accidents, queuing, and branching processes. A correlated bivariate version of the univariate generalized Poisson distribution is defined and studied. Estimation of its parameters and some of its properties are also discussed.     

Social justice in a cold climate: Could social accounting make a difference?

Building on the argument that justice should be the transcendent principle in accounting, we argue that social accounting invokes notions of community, shared social values, and fairness in the distribution of social resources. These ideas are elaborated in relation to local government, which provides a window on how communities make decisions about distributing their social resources and the accounting processes which guide these decisions. Fieldwork in two large but contrasting English local authorities suggests that the potential of social accounting is not reflected in the predominant accounting systems in local government organisations, but in more subtle and successful forms of ‘enacted social accounting’. Its utility relates to the achievement of short-term social goals where social injustices persist and accountants, managers and politicians seek to accommodate financial pressures to protect the most vulnerable members of the community. We identify local government accountants as morally responsible for the further development of social accounting which envisions a future for local government, and establishes links between social justice, environmentalism and localism.