基于智能移动终端的智能家居技术专利分析

随着无线通信技术和智能移动终端的发展,用智能移动终端借助无线通信网络随时随地控制智能家居成为可能,也成为业界关注的热点。针对基于智能移动终端的智能家居技术的特点、国内专利申请分布情况、专利涉及的主要领域、主要专利申请人、涉及的关键技术等方面进行了分析和研究。     

移动数据通信技术及其发展

详细阐述了利用模拟、数字蜂窝移动通信系统实现数据业务的原理和主要技术。指出移动数据通信是跨世纪无线通信发展的热点。     

移动数据通信技术及其应用

首先介绍了移动数据通信的基本概念，分类描述了当今几种典型的移动数据通信技术及其系统结构，并对它们的传输速率、技术特点及其在实际中的应用作了一些比较。最后，指出移动数据通信将是下世纪无线通信发展的热点     

移动中继通信技术综述

随着无线通信的发展,以中继为代表的协作通信技术被认为是未来无线通信系统中的关键技术之一。利用中继可以以较小的代价扩展小区覆盖范围和增加系统容量。目前,固定中继的研究已日趋成熟,移动中继正成为一个新的研究热点。由于移动中继本身的特性,它在带来诸多好处的同时也面临一些挑战。文中阐述了移动中继的研究现状,介绍了移动中继的应用场景,对其关键技术进行了综述与展望。     

浅析无线通信技术的发展趋势

1公众移动保持增长的全球趋势 目前，全球无线通信产业的两个突出特点体现在：一是公众移动通信保持增长态势，一些国家和地区增势强劲，但存在发展不均衡的现象；二是宽带无线通信技术热点不断，研究和应用十分活跃。     

无线通信网络技术探析

随着无线网络技术的不断发展,无线通信网络已成为现代人生产生活的重要内容,已成为现代科技研究的重要领域。文章首先立足无线通信网络技术的发展现状,从无线网络技术有效补偿、信息个人化、移动服务综合化等方面,阐述了无线通信网络技术的发展趋势。并针对无线网络通信技术的研究情形,从宽带无线新技术、宽带固定无线接入等方面,论述了无线通信网络技术的发展热点,旨在强化无线网络技术的认识,并为相关领域的研究提供一定的参考资料。     

移动互联网发展的回顾与展望

1 移动互联网发展现状 目前的移动互联网业务主要分为两类：一种是宽带移动互联网，即移动终端通过宽带无线通信网络直接访问传统互联网；另外一种是采用WAP的互联网，即我们常说的WAP手机上网。我国的移动互联网用户虽然发展迅速，但大多数是基于WAP／BREW上网，这与日韩等国相比有很大差别，主要原因是我国移动运营商还没有提供3G无线宽带网络服务。     

2009年无线新技市展望

UMB走向没落,LTE广受关注,经历了2008年的嬗变,无线通信技术继续向IP化、宽带化、融合化和移动化发展。进入2009年,哪些技术和应用将成为亮点,并对通信产业乃至信息服务业产生重大影响7本报告从无线接入技术、热点业务及应用和无线终端三个层面,对无线通信产业2008年的发展现状进行重点研究,并对各种热点技术和业务2009年的发展进行了判断。     

2006年美国无线通信动态

在对美国2005年无线通信市场发展现状和趋势研究总结的基础上,对其2006年的热点和动态进行了简明扼要的介绍和评析.主要涉及移动终端外形设计上的变化和追求、多种辅助增值功能的增加、3G的部署和服务发展趋势,以及IMS、FMC、MVNO、移动TV等.     

无线通信发展走势

本文从无线通信技术的发展、无线通信技术的发展趋势,以及无线通信技术之发展热点这三个方面对无线通信发展走势进行阐述。     

Elemental Compositions of Over 80 Cell Phones

Over the last few years, 85 cell phones have been disassembled, ground up, dissolved, and analyzed for elemental content, mainly for information about the metals present in the phones, but also for some metalloids and nonmetals. The following list of 38 elements were detected in some or all of the phones: Be, B, Mg, Al, Ti, V, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Y, Nb, Pd, Ag, In, Sn, Sb, Te, Ba, Ta, W, Pt, Au, Tl, Pb, Bi, Pr, Nd, Sm, Eu, Gd, Tb, Dy, and Er. Cadmium was never detected. This paper discusses the methods used for carrying out the analysis, proposes possible sources in the telephones for the elements of interest, the reasons for the interest in most of the elements, and method repeatability.     

Zero/Positive Capacities of Two-Dimensional Runlength-Constrained Arrays

A binary sequence satisfies a one-dimensional$(d_1, k_1, d_2, k_2)$runlength constraint if every run of zeros has length at least$d_1$and at most$k_1$and every run of ones has length at least$d_2$and at most$k_2$. A two-dimensional binary array is$(d_1, k_1, d_2, k_2; d_3, k_3, d_4, k_4)$-constrained if it satisfies the one-dimensional$(d_1, k_1, d_2, k_2)$runlength constraint horizontally and the one-dimensional$(d_3, k_3, d_4, k_4)$runlength constraint vertically. For given$d_1, k_1, d_2, k_2, d_3, k_3, d_4, k_4$, the two-dimensional capacity is defined as $$displaylines C(d_1, k_1, d_2, k_2; d_3, k_3, d_4, k_4) hfillcr hfill=, lim_m,n rightarrow infty log_2 N(m, n ,vert, d_1, k_1, d_2, k_2; d_3, k_3, d_4, k_4)over mn $$ where $$N(m, n ,vert, d_1, k_1, d_2, k_2; d_3, k_3, d_4, k_4)$$ denotes the number of$m times n$binary arrays that are$(d_1, k_1, d_2, k_2; d_3, k_3, d_4, k_4)$-constrained. Such constrained systems may have applications in digital storage applications. We consider the question for which values of$d_i$and$k_i$is the capacity$C(d_1, k_1, d_2, k_2; d_3, k_3, d_4, k_4)$positive and for which values is the capacity zero. The question is answered for many choices of the$d_i$and the$k_i$.     

基于51单片机的多功能电子时钟设计

单片机体积小、重量轻、抗干扰能力强、环境要求不高、价格低廉、可靠性高、灵活性好、深受初学者喜欢。以STC90C58为核心控制芯片,DS1302为时钟芯片,DS18B20采集温度,完成多功能电子时钟的设计。该设计能够准确显示年、月、日、星期、时、分、秒及温度,通过按键可以调整年、月、日、星期、时、分、秒、12/24小时转换、整点提示以及闹钟,还可显示阴阳历。     

Better breast cancer detection

X-rays go digital, computers read film, and chemicals mark tumors, but will these new technologies make it in the clinic? The imaging technologies considered for breast cancer include film-screen mammography, full field digital mammography, ultrasound, magnetic resonance imaging, scintimammography, thermography, electrical impedance imaging, optical imaging, electric potential measurement, positron emission tomography, novel ultrasound techniques, elastography, magnetic resonance spectroscopy, thermoacoustic computed tomography, microwave imaging, Hall-effect imaging and magneto-mammography     

Reduction of earthquake risk in the United States: bridging the gapbetween research and practice

Continuing efforts under the auspices of the National Earthquake Hazards Reduction Program are under way to improve earthquake risk assessment and risk management in earthquake-prone regions of Alaska, California, Nevada, Washington, Oregon, Arizona, Utah, Wyoming, and Idaho, the New Madrid and Wabash Valley seismic zones in the central United States, the southeastern and northeastern United States, Puerto Rico, Virgin Islands, Guam, and Hawaii. Geologists, geophysicists, seismologists, architects, engineers, urban planners, emergency managers, health care specialists, and policymakers are having to work at the margins of their disciplines to bridge the gap between research and practice and to provide a social, technical, administrative, political, legal, and economic basis for changing public policies and professional practices in communities where the earthquake risk is unacceptable     

基于TM影像光谱指数的棉花病害严重度估测

通过获取多时相试验区TM影像和大田同步调查棉花黄萎病,将TM影像光谱指数与病害严重度进行相关分析,建立棉花病害严重度估测模型.结果表明:随着病害严重度的增加,TM影像光谱指数B2,B4,SATVI,OSAVI,MSAVI,TSAVI,SVNSWI,SNSWIa,SNSWIb,SVNI,DNSIa,DNSIb,NDSWI...     

Recent Advances in Hybridization,Doping, and Functionalization of 2D Xenes

The emerging monoelemental 2D materials named as Xenes including borophene, silicene, germanene, stanene, phosphorene, arsenene, antimonene, bisthumene, selenene, and tellurene, have attracted rising attention experimentally and theoretically. Because of their excellent and versatile physical, chemical, electrical, and optical advantages, Xenes have been shown or have been predicted to have excellent performance in nanotechnology applications, addressing challenges and advances in electronics, energy, healthcare, and environment. In this review, the basic fundamentals in the classification of the periodic table group and the synthesis methods for the emerging materials are summarized. Then, the hybridization, doping and functionalization of 2D Xenes, and their corresponding applications are presented. Furthermore, a summary of research progress on 2D Xenes and the challenges and perspectives for their further development are discussed.     

基于多网络的矿井智能化监管系统设计

提出一种矿井智能化监管系统设计方案,该系统包括无线传感器网络（WSN）、工业以太网络、人员定位卡、井下视频手机、监管服务器、监控计算机、数据库、中心交换机、智能化监管信息平台。系统将工业以太网络和无线传感器网络结合,构建井下有线／无线的混合通信系统进行数据传输,井上利用智能化信息监管平台实现与井下作业人员、井上管理人员、井上其他人员的数据通信和资源共享;该系统具有井下人员实时定位、井下与井上实时视频通信、矿井环境监测、智能化信息处理、矿井信息分发、资源调度、异常情况报警等功能,矿井环境监测包括对瓦斯、CO、电化学氧气、硫化氢、风速、矿压、温湿度、矿尘、噪音等环境参数的监测。     

纳米二氧化钛的液相合成

纳米二氧化钛因其化学性质稳定、难溶、无毒、无迁移性、成本低廉且具有光敏、气敏、压敏等特性,从而在电子陶瓷、半导体、催化剂、护肤品、效应颜料和传感材料等领域有着重要的应用。本文较深入地分析了溶胶-凝胶法、沉淀法、水解法、微乳液法和胶溶法等液相方法的特点以及它们的工业化新进展。在合成TiO_2的三大类工艺(气相法、液相法与高能球磨法)中,液相合成方法是最简单易行的工艺。