Backup warning system devices were evaluated to determine if they would alert winter maintenance snow plow drivers to obstacles directly behind the trailer and out of view of the driver when a unit is backed up. When the sensors on the back of the tow plow were covered with snow during plowing operations, the sensor would go off in the cab and continue going off, which would result in drivers turning the volume of the unit way down. One shop stated that the wireless transmitted signal would be hit or miss depending on the winter weather that they were operating in. The sensors on the back of the tow plow trailer would come in contact with salt brine and in this situation one of the sensors did go bad. The weatherproof box that was designed to keep the system waterproof did not fully keep the moisture out. It was found that the system did alert drivers of items behind the unit and there were no backup accidents reported during the research period.

关键词：传感器；牵引犁；备份预警系统；除雪

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Cyanide is a deadly poison which may be ingested or inhaled and can cause severe incapacitation or death. The diagnosis of cyanide exposure is critical to speed treatment and reduce harm. The development of a diagnostic sensor device and the identification and analysis of novel biomarkers of cyanide exposure are the major objectives of this research. Since the onset of toxic outcome from cyanide exposure is very fast, a rapid and portable sensor for the detection of cyanide exposure was developed and tested. The sensor utilized a cyanide-selective fluorescent reaction as the core chemical reaction with micro-diffusion sample preparation (previously reported). Second- and third-generation cyanide sensors were developed and the latest version is currently undergoing laboratory testing. Multiple novel markers of cyanide exposure were also identified as having potential advantages to cyanide and thiocyanate, and methods of analysis for these markers were developed or are in the process of being developed. Specifically, 2-amino-2-thiozoline-4-carboxylic acid (ATCA), alpha-ketoglutarate, and a cyanide-glutathione adduct were investigated. Toxicokinetic models were obtained through analysis of the plasma concentrations of ATCA, cyanide, and thiocyanate, analyzed from cyanide-exposed rats (previously reported), rabbits (reported in 2012), and swine, to assess the utility of ATCA as a bio-marker for cyanide exposure.

关键词：传感器；实验室检测；氰化物；化学反应

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当前，全球通信设备制造业正处在重大变革 的关键节点。一方面，由于全球经济复苏困难，加之电信运营业增长乏力，主要通信设备企业均出现利润下滑与增长放缓局面，产业增长正陷入新一轮低潮，未来增长空间受限。另一方面，伴随产业融合发展，以虚拟化为代表IT技术理念正深刻融入网络设备各领域，从产品架构、制造模式、产业生态等各方面对通信设备产业带来重大影响

关键词：通信设备；通信制造业；产业生态；经济低迷；融合

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在全球各国家和地区电信监管部门、运营商与设备制造企业的共同推动下，LTE的产业化和商用化发展迅猛。截至2013年12月，全球已部署LTE商用网络251个，143个国家的499个运营商参与投资LTE产业。到2013年底，全球预计有260张LTE网络实现商用。同时，伴随着无线频谱资源的日益紧缺，TDD技术的优势与价值逐步凸显。目前，全球共有25张商用TD-LTE网络投入建设，中国也已发放TD-LTE运营牌照。而作为至关重要的产业环节，TD-LTE芯片及终端的发展水平将直接决定产业链的商用成熟度。

关键词：TD-LTE终端；芯片；产业链

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自2008年10月以来，我国电信基础设施的共建共享工作经过全行业的共同努力，在降低网络建设成本、提高基础设施利用率、维护行业整体利益上取得了显著成效，对促进我国信息通信行业的健康发展起到了积极作用。文章分析了我国电信基础设施共建共享的总体进展，总结了共建共享工作的主要经验及其存在的问题，并对下一步我国共建共享的发展走向进行了展望。

关键词：通信行业；共建共享；回顾与展望

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工信部网站5月9日报道，为贯彻落实党的十八届三中全会关于全面深化改革、完善主要由市场决定价格的机制精神，决定放开各类电信业务资费。主要有以下五方面： 一、所有电信业务资费均实行市场调节价。电信企业可以根据市场情况和用户需求制定电信业务资费方案，自主确定具体资费结构、资费标准及计费方式。 二、电信企业自主制定电信业务资费方案时，应当遵循合法、公平、诚信原则，考虑用户的不同需求，提供业务打包等多种资费方案供用户选择。 三、电信企业应进一步提高资费透明度，建立资费方案公示制度，通过营业厅、代理代办点、网站等方式公布所有面向公众市场的在售资费方案。 四、电信企业与用户签订的协议中应包含资费标准、计费方式、对应服务和适用期限等内容。 五、电信企业要严格执行有关政策，履行社会责任，建立健全电信资费内部管理制度，自觉规范经营行为，努力降低经营成本，为用户提供更优质、更低廉、更透明的电信服务。

关键词：通信行业；要闻综述

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2014年1季度，世界经济温和复苏，发达国家经济复苏出现分化迹象，而新兴市场国家经济面临不同程度的下行压力。从国际经济形势来看，美国经济受天气影响，GDP增速低于预期；欧元区在经历了债务危机的打击之后正在慢慢恢复元气；而日本经济则受制于私人部门消费增长没能达到预期和出口不振的影响，增速明显低于预期。从国内形势来看，中国经济开局平稳，总体良好。1季度国内生产总值128213亿元，按可比价格计算，同比增长7.4%，比去年同期和全年均回落0.3个百分点。经济增速的回落，也使得电信业务收入受到了一定程度的影响，2014年1季度，电信业务收入实现2908.3亿元，同比增长6.5%，增速较上年回落2.6个百分点。

关键词：通信行业；分析报告

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Camera accessories, such as lenses, supports, flashes, and bags and cases, are mainly used to improve the efficiency, accessibility, and usability of a camera. They act as an add-on or support for a camera, help with special effects, and enhance image quality. Global statistics have indicated that more than 400 billion images have been captured per year since 2010. The popularity of digital photography is contributing to the sale of digital cameras and their accessories around the world.

关键词：相机配件；比如镜头；支架；闪烁；箱包

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A digital camera is an optical device used to capture and store images and videos in a digital format. The different types of digital cameras include built-in lens cameras, such as point-andshoot cameras, and interchangeable lens cameras, such as DSLRs and MILCs. A DSLR camera works on a unique reflex design scheme that combines optics with the mechanism of an SLR camera and a digital imaging sensor. An MILC is a class of digital system cameras that provides n interchangeable lens mount; it does not have a mirror reflex optical viewfinder. The popularity of digital photography is contributing to the sales of digital cameras worldwide. Global statistics have indicated that more than 400 billion images have been captured per year since 2010.

关键词：数码相机；数字捕获；存储图像；视频；光学设备；照相机；数字成像传感器

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编译器中通常采用各种优化方法来提高目标代码的质量,为了实现较好的效果,一些编译优化算法通常十分复杂,很容易给可靠性和安全性带来隐患.现有的编译器缺陷大部分是由优化阶段引起的.传统的编译优化正确性研究大部分只关注优化算法的正确性,但是只有该算法被正确的实现了才能确保实际运行的优化过程是正确的.本文提出一种基于模拟关系的方法来验证编译优化实现的正确性.在每次优化结束后,我们通过建立优化前代码和优化后代码之间的模拟关系生成优化正确应满足的逻辑条件,然后验证逻辑条件是否成立从而判定编译优化的实现是否正确性.以优化编译中的常量折叠优化和变量替换的验证作为示例显示了本方法的有效性和可靠性.

关键词：编译优化；正确性；模拟关系；定理证明

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