利用Nport Express实现单片机的接入网络

随着以太网的发展，单片机通过串行口接入网络的要求日益提高。本文就如何利用M0XA公司的Nport Express使单片机接入以太网进行了一些探讨。     

论政策法规建设与水文事业发展的辩证关系

简述水文政策法规建设的现状,指出水文政策法规滞后将影响水文事业的发展;概述广西水文政策法规建设所取得的成就和突破;结合广西的特点,提出水文政策法规建设的任务.     

Major oil exporters may profit rather than lose, in a carbon-constrained world

The Organization of Petroleum Exporting Countries (OPEC) claims compensation for losses in expected oil export revenues due to CO₂ mitigation measures in developing countries. These losses are expected for two primary reasons: a reduction in the consumption of oil in importing countries and a reduction in the producer price of oil (taxation in an importing country implies a transfer of rents from producers to consumers). So far, most studies have focused on these two mechanisms and corroborated that revenue losses for OPEC are to be expected. However, there are also mechanisms that may be expected to raise the price of oil products. In a cost-effective regime for dealing with climate change, i.e., a regime in which all or most countries participate and in which the same carbon price is applied on all carbon-emitting activities, the cost of using unconventional oil, or synthetic diesel from coal, will increase even more than the cost of using conventional oil. Given that reserves of conventional oil are expected to dwindle over time, heavy oils and coal to liquids might set the long-run price for liquid fuels, which means that the price of oil would increase beyond the carbon fee; i.e., the rent on conventional oil would increase. We use an energy-economic optimization model to analyze these three mechanisms. We find that the net present value of OPEC revenue from conventional oil increases slightly (at most by 4 percent) with a global CO₂ restriction regime. We also consider conditions under which this result does not hold.     

MSP430中Timer_A and Timer_B的UART运用

自1996年MSP430十六位单片机问世以来，它的低功耗性能及丰富的片内资源受到各方面的好评，本文针对MSP430F13X及MSP43014X系列单片机中的定时器进行介绍，利用定时器A（Timer_A)和定时器B（Timer_B)中的捕获比较寄存器来开发多个串行通信 口，使十六位单片机在通信 领域发挥更大的潜力。     

A note on iterative marginal optimization: a simple algorithm for maximum rank correlation estimation

The maximum rank correlation (MRC) estimator was originally studied by Han [1987. Nonparametric analysis of a generalized regression model. J. Econometrics 35, 303-316] and Sherman [1993. The limiting distribution of the maximum rank correlation estimator. Econometrica 61, 123-137] from the econometrics point of view, and most recently attracted much attention from the classification literature due to its close relationship with the receiver operating characteristics (ROC) curve [Baker, 2003. The central role of receiver operating characteristics (ROC) curves in evaluating tests for the early detection of cancer. J. Nat. Cancer Inst. 95, 511-515; Pepe, 2003. The Statistical Evaluation of Medical Tests for Classification and Prediction. Oxford University Press, Oxford; Pepe et al., 2004. Combining predictors for classification using the area under the ROC curve. University of Washington Biostatistics Working Paper Series]. Compared with its nice theoretical properties and successful applications, the MRC estimator's computational aspects are not trivial. This is because the MRC objective function is neither smooth nor continuous. Therefore, the traditional Newton-Raphson type algorithm cannot be used to find the MRC estimator. As an easy solution, we propose in this article a very simple fitting algorithm named iterative marginal optimization (IMO), which guarantees a monotone increasing of the MRC objective function at each iteration step in a very efficient manner. We show via extensive simulation that the proposed IMO algorithm is not only computationally stable but also reasonably fast. Moreover, real data about the China stock market are analyzed to further illustrate the usefulness of the proposed.     

基于数字口岸港口物资信息管理系统的开发

在数字口岸构架下,分析了港口企业物资管理工作的特点,讨论了港口物资信息管理系统的协同平台功能和需求,为港口物资信息管理系统的建设实施提供了基本的研究方法和理论基础。     

基于多线程TCP端口扫描的实现与应用

用VC^ 6．0实现了TCP端口扫描，通过应用多线程技术和仅扫描Ping响应主机提高了扫描效率。程序还能够实现检验IP是否在线、查询主机名和显示端口Banner信息等多项端口扫描相关功能，并扩展实现了简单的SYN攻击功能。     

Impacts on Children of a Policy to Promote Employment and Reduce Poverty for Low-Income Parents: New Hope After 5 Years.

The impacts of New Hope, a program to increase parent employment and reduce poverty, were measured 5 years after parents were randomly assigned to program or control groups. New Hope had positive effects on children's school achievement, motivation, and social behavior, primarily for boys, across the age range 6-16. In comparison to impacts measured 2 years after program onset, effects on achievement were robust, but effects on social behavior were reduced. The program produced improvements in family income and use of organized child care and activity settings, suggesting possible pathways by which the New Hope package of policies influenced children's behavior. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

策略化的安全策略集中管理模型研究

分析了现存安全策略集中管理模型,提出了一种更为灵活的策略化的安全集中管理模型,并就此模型实现的关键技术做论述。最后就本模型和既有模型作出对比。     

Kenneth B. Clark in the patterns of American culture.

Kenneth B. Clark is most well-remembered as the social scientist cited by the U.S. Supreme Court in footnote 11 of its decision in Brown v. Board of Education in 1954. His presence in that decision came to symbolize the role that social science could play in changing social policy and public attitudes. As an African American social scientist who was prominent during a time of great turmoil over racial issues in the United States, Clark also became a "participant-symbol" in America's discussion of race. Clark contributed to this discussion in the three books he wrote for the general public: Prejudice and Your Child (Clark, 1955), Dark Ghetto (Clark, 1965), and Pathos of Power (Clark, 1974). In this article, the author discusses how these works document Clark's growing pessimism about the prospects for improving race relations. In addition, Clark's place in contemporary American debates about Brown v. Board of Education and the persistence of racial equality is considered. (PsycINFO Database Record (c) 2010 APA, all rights reserved)