CDMA系统多用户检测评价标准

多用户检测技术是CDMA系统中抑制多址干扰的主要技术之一,然而至今为止还没有能够真正的实现实用化.本文分析了多用户检测技术走向实用化所面临的问题,从实现角度出发提出了新的评价多用户检测算法的几个标准.     

一个真实的美国智能数字家庭

5年前，当我们还在描绘着Internet未来的发展前景，想象着5年之内是否一定要在办公室而不是在家里办公、想象着在家里通过Internet对自己的身体做自我诊断、接受远程教育并拥有整个世界的美妙感受。 现在，这一切通过智能家居布线的演绎，已成为一实的生活情景。由于智能家居布线系统的灵活开放性设计，省时、省力又省成本的特点，目前已受到大厦管理者、承包商、系统集成商的极大关注和青睐。在北美、澳大利亚、中国的应用已越来越普遍。在这里，可以借鉴在美国康州构建的一所典型的智能小屋，向读者展示智能家居布线系统的魅力。[编者按]     

桥之城

桥之城ＲｉｃｈａｒｄＡａｒｏｎ为了把克利夫兰带进２１世纪,西雅图ＲｏｓｓＤｅＡｌｅｓｓｉ照明设计事务所的ＲｏｓｓＤｅＡｌｅｓｓｉ和ＢｒｉａｎＬｏｃｋｗｏｏｄ把想象与实际的运作结合起来,做出了克利夫兰２４座桥中１８座的照明设计方案。其中８座被市政当局和...     

PV销售额反弹但盈利下滑

Young Market Research（YMR，德州，奥斯汀）最近发布的一份深度报告显示，上个季度光伏产业的销售额出现反弹，但盈利仍然继续下滑。报告的分析部分做了更为详细的介绍：北美供应商的增长更快，并在此期间几乎取得盈利，而中国的公司在第三季度显示出最好的潜力。     

主数据管理的五种趋势

尽管当前的经济危机不容乐观，但很多分析公司仍宣称MDM不会受经济衰退的影响。对大部分企业而言，对主数据的成功管理和控制是机会与挑战并存。     

MEMS振荡器技术设计概要

参考频率信号系统设计 频率信号对于所有电子产品就像是心跳对所有动物的生命一般重要,所有电子电路的动作都以此重复性且稳定的频率信号作为参考信号源。设计优良的频率信号,几乎是系统是否能够达到高效能、     

Acceptability of complementary foods and breads prepared from zinc-fortified cereal flours among young children and adults in Senegal

We completed a series of studies to assess the acceptability of zinc-fortified, cereal-based complementary foods and zinc-fortified wheat breads. Young children and their caregivers completed acceptability tests with complementary foods fortified with iron only (60 mg iron as ferrous fumarate per kilogram cereal flour), or the same level of iron and zinc (240 mg zinc as zinc oxide per kilogram cereal flour), and the caregivers completed triangle taste tests to compare the same products. A separate group of adult participants completed acceptability tests with wheat breads fortified with iron and folic acid (15 mg iron as ferrous fumarate per kilogram flour and 1.5 mg folic acid per kilogram flour) or the same levels of iron-folic acid and 2 levels of zinc (63 mg zinc or 126 mg zinc as zinc oxide per kilogram flour). Finally, a threshold test was administered to another group of adult participants to compare nonfortified wheat bread to breads fortified with zinc in 80 mg increments ranging from 80 to 400 mg zinc as zinc oxide per kilogram flour. All products were acceptable when compared to non-zinc-fortified equivalents, and were well liked by the respective participants. For the triangle tests, caregivers were not able to detect significant differences between products. For threshold tests, adult participants detected differences in breads prepared from fortified wheat flour at 80 mg, 160 mg, and 320 mg zinc per kilogram flour, but not at 240 mg and 400 mg zinc per kilogram flour, respectively, when compared to nonfortified bread equivalents. Zinc fortification of cereal flours in the ranges of fortification that were tested does not adversely affect the acceptability of complementary foods and breads prepared from these flours. Practical Application: Fortification of staple food products is a low-cost approach to deliver additional micronutrients (including zinc) to large segments of a population. Determining the acceptability of products fortified with zinc is an important step in the development of zinc fortification programs.     

地球空间环境要素可视化技术研究

从地球空间环境的磁场和辐射带等基本要素的通用物理模式出发,对各幕本要素在可视化时需重点表达出的信息进行了分析.针对这些特点,对地球磁场提出了用磁感应强度、磁力线等多种可视化方式以及关键数据的计算方法;对辐射带提出了最外层表示法、全空间截面法、截面动态扫描法以及随视点自动截面法等多种可视化方式.对各可视化方式的优缺点进行了对比分析,并以此为依据提出了各种表达方式所适用的不同用途.     

基于符号学的智能头盔语义设计研究

近年来，伴随着5G、VR、AR等技术的迅速发展，具有蓝牙通话、佩戴检测、碰撞检测、自感应尾灯等核心安全功能的智能头盔横空出世，广泛受到消费者的喜爱。从符号学的产品语义角度出发，阐述了头部保护装置的发展历史、功能属性以及文化属性；结合符号学使用情景下的造型语义、色彩语义、图案语义等，对智能头盔的语义运用进行了分析；对智能头盔的AR技术整合和未来设计方向进行了探索与展望。