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1.
This paper scrutinizes the conventional wisdom about trends in UK income inequality and also places contemporary inequality in a much longer historical perspective. We combine household survey and income tax data to provide better coverage of all income ranges from the bottom to the very top (and make our estimates available to other researchers). We make a case for studying distributions of income between tax units (i.e. not assuming the full income sharing that goes with the use of the household as the unit of analysis) for reasons of principle as well as data harmonization. We present evidence that income inequality in the UK is as least as high today as it was just before the start of World War 2.  相似文献   
2.
陈相弘  解凡  张维娟 《价值工程》2012,31(31):26-27
介绍了ADE7758电能计量芯片的主要特点,提出了基于ADE7758和AT89C52的电机数据采集系统硬件和软件设计方案。数据采集系统适用于电机监控系统的要求,具有精度高、实时性好,价格低的特点。  相似文献   
3.
Survey under‐coverage of top incomes leads to bias in survey‐based estimates of overall income inequality. Using income tax record data in combination with survey data is a potential approach to address the problem; we consider here the UK's pioneering ‘SPI adjustment’ method that implements this idea. Since 1992, the principal income distribution series (reported annually in Households Below Average Income) has been based on household survey data in which the incomes of a small number of ‘very rich’ individuals are adjusted using information from ‘very rich’ individuals in personal income tax return data. We explain what the procedure involves, reveal the extent to which it addresses survey under‐coverage of top incomes and show how it affects estimates of overall income inequality. More generally, we assess whether the SPI adjustment is fit for purpose and consider whether variants of it could be employed by other countries.  相似文献   
4.
毫米波地面通信系统是典型的视距通信。目前我国使用的时统设备存在结构庞大、使用不够简便等缺点。GPS时统系统具有体积小、精度高、掉电不丢失数据等特点。利用GPS所提供的秒脉冲前沿为时间基准,通过DS3231把时间进一步细到微秒数量级,保证了跳频通信的可靠性和准确性。  相似文献   
5.
曾婷  万星宇 《价值工程》2011,30(23):144-145
结合实际项目的开发经验,介绍了华邦电子的ISD1700系列语音芯片,给出了其管脚各功能、内部存储器结构、采样频率和工作方式模式,最后介绍了该系列语音芯片实际应用设计的两个典型实例,并得出相关结论。  相似文献   
6.
研究了智能家居网络中的信息采集系统,提出了采用ATmega 8单片机实现RF服务器和终端信息采集设备,同时涉及SPI和USART接口技术。  相似文献   
7.
嵌入式系统设计中对硬件的依赖性极强,为了寻求一种简单实用的学习嵌入式系统设计方法,本文介绍在Proteus和ADS虚拟平台上进行嵌入式系统开发的步骤和一般方法,通过这种仿真教学模式提高学生学习嵌入式系统理论的兴趣和效果,本文着重介绍基于LPC2124数据采集控制系统的设计。  相似文献   
8.
This paper is concerned with arbitrage opportunities in the futures and futures option contracts traded on the Sydney Futures Exchange (SFE) within a put-call-futures-parity (PCFP) framework. Tick-by-tick transaction price data are employed so that the futures contracts, the call futures options and the put futures options can be matched within a one-minute interval. This paper also takes into account the realistic transaction costs that an arbitrager has to incur, including the implicit bid-ask spread. A thorough ex post analysis is first carried out. The results reveal a significant number of violations of the PCFP in the sample. Ex ante tests are then conducted whereby ex post profitable arbitrage strategies, signified by the matched trios of futures, put and call contracts, are executed with lags up to 3 min. The ex ante results are similar to the ex post results. However, further analysis reveals that the exploitability of the identified arbitrage opportunities is very limited due to the small trading volumes of the futures and options contracts. Thus, we conclude that there is no strong evidence against the arbitrage efficiency between the SPI index futures and options markets in Australia.   相似文献   
9.
针对目前Windows下个人防火墙软件在拦截网络数据封包上所存在的不足,提出了一种新的用户态和内核态混合的网络数据封包拦截方案。该方案基于Winsock2服务提供者SPI和NDISHOOK,能克服单一的网络数据包拦截方案的缺点,在理论上可以截获所有通过Windows的网络封包,同时接口简单、思路明确并且容易实现软件的自动安装。根据实验系统的测试表明,新的网络数据包拦截方案有很好的稳定性,系统具有良好的使用价值。  相似文献   
10.
8255A并行接口芯片是一种十分通用的接口芯片,SPI总线作为一个全双工的串行接口,在工业控制中得到广泛应用.文章给出了一种采用8086处理器控制8255A来模拟SPI总线,实现按字节传输数据,控制MAX1270 A/D的设计方法,并给出了详细的设计与实现过程.  相似文献   
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