基于容积脉搏波的收缩压测量方法

利用脉搏波传播时间测量收缩压需要同时测量心电信号与脉搏波信号,这种方法不具备便携性;因此提出通过光电容积脉搏波测量脉搏波传播时间,进而无创连续测量收缩压的新方法.该方法是通过发射红光的透射式血氧指夹得到容积脉搏波,经过滤波、放大、数字信号处理后得到加速脉搏波,然后根据加速脉搏波的推进波与反射波之间的脉搏波传播时间建立其与收缩压的关系.系统通过ATmega128单片机与安卓手机来实现.针对个体的试验结果表明,该方法测量的收缩压与用电子血压计测量的收缩压有较好的一致性.     

手机短信中的模因关照

模因在手机短信的发展过程中有着重要作用,它们的复制、传播为丰富短信语言提供了一条快捷、有效的途径。我们介绍了模因的概念,模因的周期理论,说明名人名言、诗词名句、流行事物等模因在短信中成功复制和传播的原因,然后重点分析了表现型（phenotype）的短信模因。我们以模因论为基础,通过对短信中的模因现象的探析,为人们短信写作提供一些有益的启示和借鉴,也为手机短信的研究开辟一个新视角。     

基于Symbian平台智能家居控制系统的设计与实现

基于Symbian手机平台设计了一套智能家居控制系统,利用Symbian系统提供的各种资源建立智能家居远程端控制软件,并设计了一个安装在家庭的家居服务控制器.通过GSM网络,智能手机软件与家居服务器可以进行通信,实现远程控制家居设备和监控家居环境的功能.设计结果表明:通过智能手机软件控制智能家居成为可能,系统以一种新的...     

情感化设计在手机APP界面中的应用

为解决手机界面设计的可用性与视觉性间的矛盾,提高APP产品的认同度和满意度,从情感化设计的本能层、行为层、反思层3个层次的特点和关系出发,分析不同层次的情感对用户使用APP产品的影响和作用;在列举APP界面设计案例,说明不同层次的情感化设计激发用户与APP产品情感互动的机理上,总结归纳情感化设计在APP界面设计运用中的方法与原则。     

Brush drawing multifunctional electronic textiles for human-machine interfaces

Electronic textiles are a promising candidate for futuristic multifunctional clothes. However, the fabrication of robust and reproducible printed electrodes with high mechanical durability, high biocompatibility, and stable electrical performance under various mechanical deformations continues to pose a challenge. In this study, a silk fabric with printed carbon nanotube (CNT) patterns is used to produce a smart electronic textile (E-textile) for multifunctional applications. The printed CNT electrodes are used in triboelectric devices, electrically activated heaters, real-time electrophysiological sensors, and tactile sensors. The E-textile can be used as an electrically activated thermal patch to generate heat on cloth for providing warmth to the human skin and for therapy. Owing to the micro hierarchical pores of the fabric, skin contact generates a power density of about 0.7 mW cm⁻² via effective contact electrification.     

Injection attack detection using machine learning for smart IoT applications

Smart cities are a rapidly growing IoT application. These smart cities mainly rely on wireless sensors to connect their different components (smart devices) together. Smart cities rely on the integration of IoT and 5G technologies, and this has created a demand for a massive IoT network of connected devices. The data traffic coming from indoor wireless networks (e.g., smart homes, smart hospitals, smart factories , or smart school buildings) contributes to over 80% of the total data traffic of the current IoT network. As smart cities and their applications grow, security and privacy challenges have become a major concern for billions of IoT smart devices. One reason for this could be the oversight of handling security issues of IoT devices by their manufacturers, which enables attackers to exploit the vulnerabilities in these devices by performing different types of attacks, e.g., DDoS and injection attacks. Intrusion detection is one way to detect and mitigate the risk of such attacks. In this paper, an intrusion detection method was proposed to detect injection attacks in IoT applications (e.g. smart cities). In this method, two types of feature selection techniques (constant removal and recursive feature elimination) were used and tested by a number of machine learning classifiers (i.e., SVM, Random Forest, and Decision Tree). The T-Test was conducted to evaluate the quality of this proposed feature selection method. Using the public dataset, AWID, the evaluation results showed that the decision tree classifier can be used to detect injection attacks with an accuracy of 99% using only 8 features, which were selected using the proposed feature selection method. Also, the comparison with the most related work showed the advantages of the proposed intrusion detection method.     

手机辐射生物效应的量子理论研究

介绍了手机辐射生物效应的研究近况,并列举了一些相关的研究与实验.回顾了以往生物效应的理论研究成果,指出用经典理论解释微观现象可能不准确,方法有待改进.文章提出在微观领域,即细胞核内用量子理论来分析DNA分子与外加电磁波作用的观点.指出电磁生物效应的原因之一是由于DNA分子受外加电磁波的作用,分子能级结构发生改变.给出了量子理论的公式推导和量子效应解释,最后指出微波辐射和DNA分子作用的结果,可能是一种属于"时间长、见效慢"的生物效应.     

IP电话技术浅析

通过ＩｎｔｅｒｎｅｔＰｒｏｔｏｃｏｌ（以下简称ＩＰ）电话与传统电话网络的互通模型,论述ＩＰ电话技术低运营成本和高级钦样性服务两方面的优势,以及与传统电话技术相比存在服务质量、网络接入和兼容性差等的不足。     

信用卡电话呼叫系统

信用卡电话呼叫系统,同ＩＰ电话技术、呼叫中心技术与信用卡支付手段相结合的系统,是集现代计算机技术、网络技术、ＣＴＩ技术、多媒体技术以及互联网技术于一体的、综合性的服务中心。信用卡电话呼叫系统即可独立成系统,也可以作为呼叫中心功能的一部分,对系统的体系结构、功能、应用以及发展方向进行了介绍。     

IP电话技术及其应用前景

介绍了 IP电话的基本概念、原理和相关技术 ,分析了其相对于传统电话的优、缺点 ,说明了 IP电话目前存在的问题 ,同时预测了 IP电话的应用前景