重点放射源在线监测及监控技术现状及展望

从当前核探测技术的研究现状人手,详细介绍了重点放射源在线监测及监控技术在软硬件领域所取得的进展,并对重点放射源在线监控技术的未来发展趋势进行了展望.     

基于数据挖掘的在线医疗诊断系统

随着生活水平的不断提高以及生活环境的不断变化,人们对医疗的重视也逐步增加,对自身健康也更加关注。文章介绍了多种数据挖掘的方法,并采用了一种通过分析数据不一致化率的分类方法实现对确诊数据的高效分类。最后,将该方法应用于糖尿病患者的确诊数据挖掘,从而通过实例证明了该分类方法在医疗领域有一定的有效性。     

基于机智云平台的滚动轴承在线监测系统

设计了一种基于云平台的滚动轴承在线监测系统,信号采集模块将振动传感器输出的振动信号进行变换,再通过有源滤波模块处理后交给控制器,控制器内部进行A/D采样,随后处理器对A/D采样后的信号进行参数的运算,最后将参数通过云平台传输协议模块,在利用WiFi转发给远程机智云平台服务器.该系统为滚动轴承的监测提供了一个平台,在这个平台上工程人员可以通过远程的云服务器和APP终端对滚动轴承的状态进行了解,很大程度上减少了工程人员的工作量,提高了对滚动轴承监测的效率.     

高速重轨平直度在线检测研究

重轨的平直度检测是重轨生产过程中重要的一个环节,该项检测的速度、准确性、稳定性等因素直接影响重轨总体质量。 本文以中国某大型钢铁集团轨梁厂的重轨平直度检测现状为背景,利用激光传感、数据采集、计算技术等现代技术,设计了一套基于并行计算的重轨平直度在线检测系统。系统采用14个激光位移传感器和2个旋转编码器分别对于重轨的7个水平方向位移测点、7个竖直方向位移测点、和重轨传输方向的位移进行实时测量,得到的信号转换为数字信号后,在PC机内通过GPU并行计算进行同步配准、块内数据分析、块间数据分析、帧间数据分析等处理,除去粗糙度、氧化铁皮、高频振动、低频振动等干扰,最后得到并输出平直度信息。实验及现场应用表明,该方法检测速度可达到3m/s、精确度可达到0.1mm.     

SMT封装电路板三维在线检测技术

为了检测回流焊接之后SMT( Surface Mount Technology)封装电路板是否存在缺陷,设计并搭建了基于线结构光传感器的SMT封装电路板三维在线检测系统,通过线结构光扫描测量,获取SMT封装电路板表面三维数据。采用双传感器测量技术,有效减少数据丢失;研究了双传感器统一标定技术,可同时实现两个传感器的参数标定和坐标系统一。提出了自适应光条中心提取算法,对反射或散射影响而形成的光条图像噪声具有很好的抑制效果,能够提取准确的光条中心。实验表明系统测量精度可达到0.02 mm。系统测量得到的三维数据,可以为在线检测SMT封装电路板缺陷提供可靠的三维信息。     

基于TOF的海潮高度在线测量系统设计

为提高现有的潮汐及水位仪器(如浮子式、超声波式、雷达式水位计)在线测量的实时性和稳定性,减小仪器的体积、成本和功耗,设计了一种基于TOF(Time of Flight,即飞行时间法)三维成像测距并结合XBEE MESH技术的无线网络测量系统.传感节点使用准直的850 nm红外LED发射光源,采用ARM+CPLD控制和提取EPC610 TOF成像芯片的有效测量数据并进行实时校正和计算,单个测量节点能实现1 m~7 m范围内误差±1.25 cm,测量速率为500次/秒的高速测量,其尺寸只有2.5 cm×2.5 cm大小.无线网络部分采用Peer-to-Peer MESH自组织网络结构,采用无线模块主动唤醒传感器,同步和异步休眠相结合的控制形式大大降低了功耗.     

基于Web的网上作业系统设计与实现

按照网上作业平台系统实现目标,完成了系统功能性需求分析。对文件的数据库方式存储和文件系统方式的存储进行了比较,并分析、设计了本系统的存储结构。完成了数据库概念模型设计和数据表物理模型设计,详细给出了数据库关系图。设计并实现了基于Internet的课程网上作业子系统、个人网络硬盘子系统、课程资源库共享等子系统。该系统已经应用到日常的教学管理中,并取得了不错的效果。     

在线考试时间控制技术的设计与实现

在线考试必须实现时间显示、定时存盘、自动交卷等时间控制功能,时间控制技术是在线考试的关键技术。传统的Web技术难以实现时间控制功能,使用AJAX技术可以方便地实现时间控制功能。文章介绍了在线考试时间控制技术的设计与实现,具体说明了AJAX组件的实现方案和关键代码。     

The supremacy of online white supremacists – an analysis of online discussions by white supremacists

A content analysis was conducted on five different white supremacist online forums to observe the discourse and types of activities occurring within. In addition, web link analysis was conducted on the forums to identify the presence of external links being posted and discussed by members. We found that members used the forums primarily for information provision, recruitment and networking. Based on these results, we discuss the implications that online hate speech have within offline settings, and the affects these activities have on Canadian citizens in light of the recent repeal of section 13 of the Canadian Human Rights Act (1985), the primary tool in Canada with which to deal with hate speech and other activities observed. The insights extracted from this research have provided novel insight into the sentiments and activities of the white supremacist movement online, a relatively unexplored venue of hate speech and propaganda online.     

How to maneuver in the world of negative online reviews,the important ethical considerations for attorneys,and changes needed to protect the legal profession

The advent of the Internet and social media has revolutionized the way society communicates, the speed in which news is disseminated, and the approach that people take in their daily decision-making. Online reviews are now common place on nearly every consumer-related website. Consequently, attorneys are also being publicly scrutinized by their clients on a range of topics from price, competence, satisfaction, personality, communication, and effectiveness. On one side of the coin, this new phenomenon can be very rewarding since attorneys were previously limited to receiving a small number of referrals from the word-of-mouth promotion before the creation of online reviews. However, the exact opposite is true. Negative online reviews, whether accurate or not, may deter potential clients from even giving the attorney a second thought. As a result, a firm's business can feel the immediate impact of negative reviews. Attorneys, who legitimately need and want to protect their business and reputation, cannot speak freely online to defend their honor. Rather, an attorney must be mindful of not disclosing confidential client information or crossing other ethical lines that may then expose the attorney to potential discipline. There are several interests that must be considered such as allowing attorneys to exercise their First Amendment right to free speech, respect and adherence to the ethical rules of non-disclosure of confidential information, allowing attorneys to preserve their reputation, and protecting an attorney's marketability and means of generating income. This article explores the trend in offering reviews online in a variety of industries, including legal services, the statistical findings regarding the prevalence of this information and consumers' reliance on the information while making a purchasing decision. This article also considers the positive and negative implications of the reviews being so widely spread, while highlighting unique considerations as it relates to the practice of law and factors that may greatly skew a reviewer and reader's perceptions. Next, this article outlines the ethical considerations of attorneys if they want to respond to negative online feedback, such as disclosure of confidential information. Then, this article analyzes the American Bar Association (ABA) and several US states' ethics opinions for guidance for attorneys who wish to respond negative reviews. Finally, this article details the author's recommendations for attorneys, the ABA, and the US states and propose the areas where additional ethics opinions, rules and guidelines should be focused to establish a proper balance between the valuable insights discovered from a client's review and attorneys' legitimate interests in protecting their reputation and livelihood from inaccurate, malicious, or erroneous postings.