基于PCI总线的DMA高速数据传输系统

提出了基于PCI总线接口技术实现DMA数据传输系统的通用设计方法。该方法应用于雷达接收机综合测试仪,当雷达接收机工作时,采用DMA方式的数据传输速率可以稳定地达到70MB/s,能够有效地采集并保存雷达各种参数,供主机快速进行雷达故障分析与判断。还重点介绍了数据传输系统中基于PCI总线的接口电路设计及基于WDM的PCIDMA驱动程序的开发。     

加强高校微机课程建设,开设《微机电路原理与维修》课

本文着重说明在当前高等院校微机教学改革中,开设《微机电路原理与维修》课的必要性、可行性,并详细介绍了该课内容、要求.     

Bayesian Design of Special Type of Double Sampling Plans for Compliance Testing

Bayesian acceptance sampling plans, which utilize prior information on the process variation, can be employed as an alternative to conventional types of plans for taking decisions on the disposition of submitted lots. A special type of double sampling inspection plans by attributes with small acceptance numbers using Bayesian methodology is presented in this paper emphasizing its significance over small acceptance number single sampling plans. The procedures for designing such sampling plans for specified degree of discrimination which would ensure protection to the producer and consumer are discussed with illustrations under the conditions for the application of gamma-Poisson distribution.     

The politics of the Digital Single Market: culture vs. competition vs. copyright

This paper examines the implications for European music culture of the European Union’s (EU) Digital Single Market strategy. It focuses on the regulatory framework being created for the management of copyright policy, and in particular the role played by collective management organisations (CMOs or collecting societies). One of the many new opportunities created by digitalisation has been the music streaming services. These depend on consumers being able to access music wherever they are, but such a system runs counter to the management of rights on a national basis and through collecting organisations which act as monopolies within their own territories. The result has been ‘geo-blocking’. The EU has attempted to resolve this problem in a variety of ways, most recently in a Directive designed to reform the CMOs. In this paper, we document these various efforts, showing them to be motivated by a deep-seated and persisting belief in the capacity of ‘competition’ to resolve problems that, we argue, actually lie elsewhere – in copyright policy itself. The result is that the EU’s intervention fails to address its core concern and threatens the diversity of European music culture by rewarding those who are already commercially successful.     

Single Parent Families:

The purpose of this single parent families bookshelf is to provide potential users with a sampling of recent books that deal with various aspects of single parenting. Books are focused on the time period of 1980 to 1993. Resources include primarily North American and Canadian entries. The titles are presented in the fol- lowing categories: children and one-parent families, cross-cultural references, divorced single parents, ethnicity and single parent fami- lies, frameworks for examining single parent families, never-married biological teen mother headed families, practical guides to single parent family living, single fathers with custody following separa- tion and divorce, and special issues of journals focused on single parent families.     

基于单片机的无线遥控小车研究与实现

本文介绍了一种由STC12C5A60S2单片机控制的无线遥控小车,采用控传和图传独立设计的思想,即数据收发模块进行控制和温度数据的传输,图传模块负责作业环境的图像传输.控传部分以STC12C5A60S2单片机为核心,利用NRF24L01+模块数据收发,L298N电机驱动两路直流电机,使小车完成相应动作;DS18B20负责检测温度,由小车收发模块发射,LCD1602液晶模块显示.系统采用模块化设计,结构紧凑,便于优化,且可靠性能高.     

DNA芯片技术

DNA芯片可用于核酸序列的测定及基因突变检测等,这里对DNA芯片的制作、作用原理、性能及用途等进行了综述。     

Socialization into single‐parent‐by‐choice family life

This paper examines family interactions between mothers and children in single‐parent‐by‐choice (SPBC) families in Spain. The data is part of a larger multi‐sited ethnographic study focused on emergent family structures that examined families formed by women who began their family projects through adoption or assisted reproduction. Single‐mothers‐by‐choice formulate various socialization goals that are tied to the complexities of their non‐conventional family project. These goals are also realized in daily conversation, particularly when families talk about future events in their lives. Our findings expand existing family language socialization research in Western contexts, which has primarily focused on conventional two‐parent families, and invite developing a stronger dialogue between family language socialization research and current debates on changing kinship structures in post‐industrial societies. Este trabajo examina interacciones entre madres e hijos/as en familias de madres solteras por elección (MSPE) en España. Los datos provienen de una investigación etnográfica multi‐lugar más amplia centrada en modelo familiares emergentes que estudió a familias formadas por mujeres solas que han comenzado su proyecto familiar a través de la reproducción asistida o la adopción. La madres solteras por elección formulan varias metas de socialización que están ligadas a las complejidades y demandas de su proyecto familiar no convencional. Estos objetivos también se plasman en conversaciones cotidianas, especialmente cuando las familias hablan sobre eventos futuros en su vidas. Nuestros resultados amplían la investigación sobre socialización lingüística familiar en contextos occidentales, que se ha centrado principalmente en familias bi‐parentales convencionales, e invitan a desarrollar un diálogo más fructífero entre la investigación sobre socialización lingüística familiar y los debates actuales en torno a cambios en los patrones de parentesco en sociedades post‐industriales. [Spanish]     

Single mother families and employment,race, and poverty in changing economic times

Using American Community Survey data from 2001, 2005, and 2010, this paper assesses the relationships between employment, race, and poverty for households headed by single women across different economic periods. While poverty rates rose dramatically among single-mother families between 2001 and 2010, surprisingly many racial disparities in poverty narrowed by the end of the decade. This was due to a greater increase in poverty among whites, although gaps between whites and Blacks, whites and Hispanics, and whites and American Indians remained quite large in 2010. All employment statuses were at higher risk of poverty in 2010 than 2001 and the risk increased most sharply for those employed part-time, the unemployed, and those not in the labor force. Given the concurrent increase in part-time employment and unemployment between 2000 and 2010, findings paint a bleak picture of the toll the last decade has had on the well being of single-mother families.