通信电话网与多媒体技术

目前要实现计算机网、电话网、电视网三网合一，尚存在传输、交换、接入设备宽带化等难以解决的问题，所以应当大力提倡在通讯电话网基础上发展多媒体业务，并保证语音，视频，数据等多种信息的传输，在方法上，可采用IP传送等技术。     

相控阵雷达天线辐射的红外成像

讨论在雷达系统状态诊断中，应用红外成像技术与先进的数字处理技术相结合的优点，该技术可以提高系统的备用性和降低军队已普遍使用的相控阵雷达系统的费用，设计方案将产生一个红外场强诊断工具，它能够快速地评估已定型的相近阵雷达性能，此工具与红外成像技术相结合还可隔离不同射频固态辐射设备（辐射阵元），一部安装在飞机上相控阵雷达系统（F-15飞机使用的APG-63雷达系统）产生的RF辐射红外成像，已经在理论上被证明。然而，由于资金的限制，按比例扩大及采用其他可能技术进行评估未能进行。今天，固态相控阵技术已被充分运用在空中和地面雷达系统，对相控阵天线进行“终端至终端”测试的能力能够确定探测性能的下降，便于用场强值去替代有故障的RF辐射设备，减少了对庞大的雷达系统的拆装、运输等各个环节，此外，该技术还可用于初级诊断工具，提高现有补给能力，可以帮助修理厂快速识别/确定故障。在相控阵雷达天线维护的基础研究中，与引入航空电子学自动测试相比较，红外成像技术可以带来一个重大的变革。     

致力提供崭新技术的摩托罗拉

自1997年开发出第一代网络以来,TETRA数字集群无线通信网络已经有了巨大发展。摩托罗拉对未来无线网络的构想是使TETRA1（窄带宽）和TETRA2（大带宽）能够与无线宽带共存或配合,以便提供更全面的无缝连接,从而实现在不同的网络系统之间的无缝漫游。这种集成可以为专有或公共网络内的设备和终端之间提供不间断的音频、     

Classification decision tree algorithm assisting in diagnosing solitary pulmonary nodule by SPECT/CT fusion imaging

Objective To develop a classification tree algorithm to improve diagnostic performances of 99mTc-MIBI SPECT/CT fusion imaging in differentiating solitary pulmonary nodules (SPNs). Methods Forty-four SPNs, including 30 malignant cases and 14 benign ones that were eventually pathologically identified, were included in this prospective study. All patients received 99Tcm-MIBI SPECT/CT scanning at an early stage and a delayed stage before operation. Thirty predictor variables, including 11 clinical variables, 4 variables of emission and 15 variables of transmission information from SPECT/CT scanning, were analyzed independently by the classification tree algorithm and radiological residents. Diagnostic rules were demonstrated in tree-topology, and diagnostic performances were compared with Area under Curve (AUC) of Receiver Operating Characteristic Curve (ROC). Results A classification decision tree with lowest relative cost of 0.340 was developed for 99Tcm-MIBI SPECT/CT scanning in which the value of Target/Normal region of 99Tcm-MIBI uptake in the delayed stage and in the early stage, age, cough and specula sign were five most important contributors. The sensitivity and specificity were 93.33% and 78. 57e, respectively, a little higher than those of the expert. The sensitivity and specificity by residents of Grade one were 76.67% and 28.57%, respectively, and AUC of CART and expert was 0.886±0.055 and 0.829±0.062, respectively, and the corresponding AUC of residents was 0.566±0.092. Comparisons of AUCs suggest that performance of CART was similar to that of expert (P=0.204), but greater than that of residents (P<0.001). Conclusion Our data mining technique using classification decision tree has a much higher accuracy than residents. It suggests that the application of this algorithm will significantly improve the diagnostic performance of residents.     

三维声呐成像系统在防波堤水下安装块石中的运用

防波堤工程水下块石安装的效率及安全是工程中至关重要的部分,而传统的安装方法和检测手段存在严重不足。三维实时声呐成像系统有效克服了传统方法的弊端,具有实时、高效、清晰、保证人员安全的优势。并且能够在水下能见度极低、海况条件差等复杂条件下正常工作。以以色列阿什杜德港防波堤工程为例,总结利用水下三维声呐成像系统安装人工护坡块石所采取的技术与控制措施,具有较高的适用和推广价值。     

易腾迈高性价比线性成像手持扫描器拓展条码扫描器系列产品

自动识别设备及解决方案领先供应商美国易腾迈公司（IntermecInc．纽约证券交易所代码：IN）目前宣布推出一款适用于中小型企业的简易可靠、高性价比的手持条码扫描器一SGIOT。该款全新SGIOT扫描器性能卓越，可以实现对准即拍，其采用固态成像技术轻松读取一维条码，是柜台基本扫描的最佳选择。     

机车主风缸焊缝的X射线数字成像工艺研究

介绍了X射线数字成像系统的原理和技术特点,分析了影响图像质量各因素的关系,根据影响关系选择风缸成像参数,并进行大量工艺试验和图像采集,由此优选出机车主风缸焊缝数字成像检测的最佳工艺组合。     

Development of IT industry in China in the new age

The article explains the role and future trend of IT industry, and states that information technology represented by the Internet and computers has brought about the third industrial revolution in history. An important impetus for economic growth in modern times, the IT industry has greatly promoted sustainable development and is profoundly changing mankind's way of life and production. In discussing the development trend of world IT industry, the article suggests that with potential new breakthroughs in information technology, the trend of agglomeration and integration of industries has become increasingly obvious, competition of intellectual properties and standards is intensifying and ubiquitous network is taking shape. It points out that China should bring into better play the role of IT industry as an "amplifier" in economic growth, a "transformer" in development mode and a "propeller" in industrial upgrading. It is important to follow a policy that emphasizes independent innovation, market-driven approach, open and compatible technologies, integrated and comprehensive applications, and serving both military and civil purposes, so that a quantum leap of IT industry will be achieved. China should advance industrialization with information technologies and promote the IT industry in the course of industrialization in an effort to build an IT industry with Chinese characteristics. Greater efforts should be made to develop such core sectors as microelectronics, computer, software, key components and materials, as well as sectors with international competitiveness, including broadband mobile communication, next-generation network and information services. Continued improvement should be made in policies guiding the development of IT industry with a view to making China a country with a strong IT industry by 2020.