曳引式家用电梯一体化控制系统的设计

以WISH8500曳引式家用电梯一体化控制系统为例介绍曳引式家用电梯控制系统的设计。结合曳引式家用电梯的基本原理,进行控制系统的功能规划和硬件电路设计,并分析了实际应用过程中的问题。     

Life style and home environment are associated with racial disparities of asthma and allergy in Northeast Texas children

A high prevalence and racial disparities in asthma and allergy have been observed in American children. This study aimed to identify risk factors for asthma and allergy among children, and their contribution to racial disparities in allergy prevalence. A population-based cross-sectional study was carried out among children aged 1-8 years in Northeast Texas 2008-2009. The health conditions, life style and home environment of 3766 children were surveyed by parental questionnaires through e.g. daycares, elementary school, and medical clinics. Among participants who indicated their ethnicity, 255 were Mexican-Americans, 178 Afro-Americans and 969 Caucasians. Afro-American children had a significantly higher prevalence of asthma and eczema. Caucasian had the highest prevalence of rhinitis. Compared to Mexican-American children, Afro-American and Caucasian children were breast fed shorter time, more often went to day care center, had pets and environmental tobacco smoke exposure at home more often. For all children, being at a day care center, being exposed to dampness and environmental tobacco smoke at home were strong risk factors for asthma and allergy. Central air conditioning system was associated with an increased prevalence of wheeze among Mexican-American children, while pets were associated with an increased risk of rhinitis among Afro-American and Caucasian children. Caucasian children were generally not healthier than relatively poor Mexican-American children. Differences in the prevalence of asthma and allergy between races cannot be explained by socioeconomic status only. Life style and home environmental exposures are important risk factors for asthma and allergy in Northeast Texas children.     

探矿权采矿权与所有权收益之关系的思考

分析和探讨了探矿权和采矿权的内涵和实质,研究分析了国家作为矿产资源所有者、投资者和社会管理者3个不同身份对于探矿权采矿权的不同的权利职责、影响和作用。认为探矿权价款实际上是弄清家底(矿产资源)所付出的代价,而采矿权价款则是国家凭借所有权获得的所有权收益。探矿权使用费和采矿权使用费则是国家作为管理者对矿产资源进行监督管理的体现。探矿权采矿权的设立和实现,是国家作为矿产资源所有者实现其所有权收益的过程,是国家作为投资者获得投资收益的过程,同时也是国家作为管理者进行监督管理和提供服务以及促进国民经济健康发展的过程,当然也是探矿权人和采矿权人获得相应合理经营收益的过程。     

对数字家庭网络新核心——家庭网关的分析

伴随互联网、物联网的发展,家庭设施呈数字化发展趋势,数字家庭概念的轮廓逐步清晰,包括家庭媒体设备间的数据分享、自动化家居的远程监控、对家庭网络门户及家庭内数据进行安全管理。随之衍生出对数字家庭网络新核心—家庭网关的需求。文章对家庭网关的形成、发展及未来可能性作了分析与预测,并结合国内外在家庭网关需求上的差异作了描述与分析。     

智能家庭环境中的家庭网关功能分析

随着物联网技术的快速发展,智能家庭的概念日渐成熟,越来越多的厂商开始关注这个领域,并根据各自的理解提出了很多数字家庭的概念和商业模式。文章分析了数字家庭的现状和未来发展趋势,并结合家庭网关的定位和优势提出基于家庭网关打造智能家庭的网络架构。     

基于EIB的融合组网技术在智能家居中的应用

介绍智能家居系统中的常用组网技术,分析智能家居系统的实际需求,然后结合各类组网技术的适用性,提出一种以EIB为基础,同时融合IrDA和Wi-Fi技术的智能家居系统组网技术,并在上海市长宁区某街道的一个智能家居体验点中进行应用。该组网技术兼顾满足了智能家居系统高可靠性、高稳定性以及高速性的需求,具有一定的应用前景。     

宽带中国战略下一户多机的研究和实践

随着国家"宽带中国"战略的发布,高接入带宽为一户多机创造了良好的条件。同时,用户个性化需求日益强烈,家庭内手机、PAD、机顶盒、电脑多种终端使用视频服务等宽带业务将成为常态。文章分析一户多机面临的挑战,提出运营商在一户多机时代的应变之道。     

Knowledge of Home Dialysis Among Inner‐City Satellite Hemodialysis Patients

There is limited use of home renal replacement therapies in the U.S.A. One percent of dialysis patients are on home hemodialysis (HHD) and only 9% undergo peritoneal dialysis (PD). In an effort to better understand this, 161 satellite hemodialysis patients in 6 units in Brooklyn were surveyed. Forty‐eight percent of patients were women, 86% were black, 5% white, 8% Hispanic, and 1% other. Mean age was 49.4 years (range 22 – 69 years). Etiology of renal disease was hypertension (41%), diabetes mellitus (31%), polycystic kidney disease (3%), systemic lupus erythematosus (4%), and other or unknown (21%). Patients were queried about knowledge of and attitudes toward home therapies. Seventy‐nine percent of patients knew of home dialysis. The source of this information was the nephrologist (59%), the social worker (14%), a nurse (8%), other patients (4%), and other sources (15%). Only 10% of patients had ever considered HHD. Fifty‐four percent were afraid to do self‐care at home and 35% were not interested. Surprisingly, only 3% felt they had no reliable helper and 8% felt that their housing was not suitable. Similarly, 78% of patients had been spoken to about PD, but only 11% had considered it. Forty‐one percent were afraid of doing self‐care on PD, and 45% were not interested. We conclude that, although the majority of patients in six inner‐city dialysis units had heard of home dialysis, only a small number ever considered it. As many patients were afraid of doing home therapy, better education about the risks and benefits needs to be disseminated.     

The Determinants of Home Price Appreciation Among Community Reinvestment Homeowners

Homeownership is considered an effective wealth creation mechanism for low-income households. This study examines the appreciation of homes purchased with community reinvestment loans in a national pilot in the USA called the Community Advantage Program (CAP). Homes purchased between 1998 and 2002 are found to have appreciated at a median annual rate of 5.4% between the time of purchase and spring 2003. This is less than the national house price appreciation index of 7.0% (covering 1998–2003) but higher than other types of investments such as the Dow Jones Index (2.78% annual growth rate) and the average rate on a 6-month CD (4.34%) over the same time period. The median increase in net housing wealth of the Community Advantage homeowners is $17 492. Returns have been particularly impressive for the lowest-income borrowers. Borrowers with less than $20 000 in annual household income at the time of purchase had a median down-payment of $1790 and have experienced a median equity increase of $24 724. Price and equity appreciation rates for African Americans are solid, but are about 10% lower than for whites.     

WLAN中MAC子层接入技术的研究

多址接入技术是WLAN的关键技术之一。首先介绍了MAC子层在WLAN协议体系中的主要功能,对常用的多址技术进行了归类,根据不同的网络业务类型粗略分析了各种技术的特点,并详细剖析了当前几种热点WLAN的接入机制,最后总结了多址技术的发展趋势。