The language of the liberal consensus: John F. Kennedy,technical reason,and the “new economics” at Yale University

On June 11, 1962, President John F. Kennedy addressed the economy at Yale University. This essay explains the symbolic charge of his economic rhetoric, a persuasive campaign that enjoyed considerable success and marked the first time that a president took explicit responsibility for the nation's economic performance. I argue that the president crafted the authority to take command of the economy through construction of a liberal ethos, the use of dissociation, and a definition of the times. His arguments, in turn, were invented from the liberal matrix that dominated politics in the mid‐twentieth‐century United States and represent the ways in which that mode of discourse develops a historically contingent and politically powerful form of technical reason. President Kennedy's speech illustrates a set of strategies that can raise the status of one political language above its competitors in the process of public argument.     

基于TMS320C5402的数字滤波器的实现

数字滤波器广泛地应用于数字信号处理领域．本文以DSP应用系统开发知识为基础,介绍了FIR数字滤波器的设计方法,并重点论述了在TMS320C5402DSP上实现滤波器的关键技术．实践证明,借助DSP硬件结构上的优势,所设计的数字滤波器具有运行速度快、能够对信号进行实时处理、精度高等优点．     

基于PIC30F5015的电机软启动器的研制

依据三相交流感应电机的实际应用,介绍了基于PIC30F5015单片机控制的软启动系统结构和功能原理,给出了软启动器的设计方法,介绍了硬件电路的实现,对具体系统的控制功能和相应的算法做了详细说明,从调试的结果来看,针对不同的应用环境,实现了转矩、恒流、电压斜坡和突跳的电机软启动功能,而且系统具备过欠压保护、过流过载保护、错相报警、缺相保护、过热保护功能。     

The international transferability of immigrants’ human capital

This paper uses the approach in the under/over education literature to analyze the extent of matching of educational level to occupational attainment among adult native born and foreign born men in the US, using the 2000 Census. Overeducation is found to be more common among recent labor market entrants, while undereducation is more likely among older workers. Among immigrants, greater pre-immigration labor market experience is associated with poorer job matches, presumably due to the less-than-perfect international transferability of foreign experience. A longer duration in the US, however, is associated with a lower probability of being overeducated and a greater probability of being undereducated. This is consistent with immigrants being favorably selected for occupational advancement but this effect becomes realized only after overcoming the disadvantages of the less-than-perfect international transferability of their pre-immigration skills.     

基于DSP的信号频谱分析与实现

文章重点讨论了数字信号的频谱,利用FFT（快速傅立叶变换）和Burg（伯格）函数的分析方法,基于MATLAB环境和TM S320C 54XDSP,分析平稳随机信号和实际的语音信号功率谱密度,以期在频域提取信号的特征。     

基于Ti-Davinci DM6446开发平台DSP的程序自引导

分析了TI公司TMS320C6446 DSP的引导加载过程及原理,主要对FLASH的功能配置、引导程序的实现方法以及部分程序编写做了阐述。     

团队交互记忆系统对群体智力的影响

摘要：团队交互记忆系统是影响团队知识分享与群体智力的重要因素。本文通过58个工作团队310名成员的调查,检验了交互记忆系统的三维模型与群体智力的四维结构,分析了交互记忆与群体智力中自组织性、稳健性、灵活性和规则有效性的关系,并通过结构方程建模验证了交互记忆系统与群体智力的关系模型,团队交互记忆系统对群体智力发展具有重要影响。研究结论对深入理解团队学习和知识管理机制具有重要理论意义。     

Intellectual property rights,trade agreements,and international trade

The global process of strengthening and harmonization of intellectual property rights (IPRs) systems has been intensified in the last twenty five years by the signing of trade agreements (TAs) that include chapters with intellectual property (IP) provisions and other trade-related issues. This paper provides a first exploration of whether and how the signing of TAs with IP chapters influences bilateral trade flows for a balanced panel of 110 countries and the period 1995–2013. We address methodological issues related to the assessment of the effect of TAs on bilateral trade. We use matching econometrics to evaluate the treatment of TAs with and without IP chapters. In addition, we estimate the effects of TAs on bilateral trade in a more dynamic fashion using a panel data approach based on the gravity model. Also, we perform our analysis for trade in low- and high-IP intensive products. We found that both types of TAs increase bilateral trade but TAs with no IPRs chapters have a stronger positive effect on trade. However, if we include lags to consider that TAs with IP chapters might need a longer implementation time, the net expected increase on trade is similar for both types of TAs. We also found that the effects depend on the development level of countries and on the IP intensity of products. We found a clear positive effect for developed countries, but we do not observe important gains for developing countries in all sectors and to all destinations derived from TAs with IP chapters. This raises the question of whether trade gains can compensate the effort related with IP reforms.     

基于STM32F103的电力载波小型路由器设计与实现

为解决高校节能监管系统配电站分布离散,各站内计量点规模不大时的远程集抄问题,以STM32F103处理器为核心,扩展了DL/T645-2007协议的定义,设计支持3级中继功能的电力载波（power line carrier,PLC）小型路由器。路由器以载波芯片为圆心,实际通信距离为半径,构成等效的直抄、一级中继、二级中继和三级中继蜂窝模型,并以此为基础,建立一个逻辑上以路由器为根节点,各级蜂窝覆盖圆为层次的多叉树遍历查询结构,实现了中继路由图的建立和自动中继转发抄表。所设计的中继技术在低压电力载波通信和智能水表远程集抄领域得到了成功应用,可以低成本地替代RS485以实现能耗系统的远程抄控。     

On the value of foreign PhDs in the developing world: Training versus selection effects in the case of South Africa

When seeking to improve science in emerging economies, uncertainty exists whether PhD training in an emerging economy can yield comparable results to PhD training in the developed world. Scientific achievements may vary because of excellent training at good universities, but also because excellent students select (and are selected by) good universities. This paper compares the career effects of overseas and domestic PhD training for scholars working in an emerging economy, South Africa. We differentiate between and examine both selection and training effects for PhDs from three tiers of South African and two tiers of foreign universities. South African academics with PhDs from universities in industrialised countries generally achieve greater career success than those with local PhDs, but training by universities in industrialised countries is not necessarily better than local training. Our results suggest that the perceived superiority of foreign PhD training stems from selection rather than do training effects, and pure selection effects in fact explain career outcomes better than training effects. Focusing on training rather than selection, PhDs from top South African universities produce a similar quantity and quality research output to those trained by the leading universities in the developed world. From the perspective of an emerging economy with limited resources wishing to advance science, the development of local universities should thus be stressed, although it is clear that individuals who are able to study for a PhD abroad gain personally when they return.