A nonlinear background removal method for seismo-ionospheric anomaly analysis under a complex solar activity scenario: A case study of the M9.0 Tohoku earthquake

A precise determination of ionospheric total electron content (TEC) anomaly variations that are likely associated with large earthquakes as observed by global positioning system (GPS) requires the elimination of the ionospheric effect from irregular solar electromagnetic radiation. In particular, revealing the seismo-ionospheric anomalies when earthquakes occurred during periods of high solar activity is of utmost importance. To overcome this constraint, a multiresolution time series processing technique based on wavelet transform applicable to global ionosphere map (GIM) TEC data was used to remove the nonlinear effect from solar radiation for the earthquake that struck Tohoku, Japan, on 11 March, 2011. As a result, it was found that the extracted TEC have a good correlation with the measured solar extreme ultraviolet flux in 26–34 nm (EUV_26–34) and the 10.7 cm solar radio flux (F_10.7). After removing the influence of solar radiation origin in GIM TEC, the analysis results show that the TEC around the forthcoming epicenter and its conjugate were significantly enhanced in the afternoon period of 8 March 2011, 3 days before the earthquake. The spatial distributions of the TEC anomalous and extreme enhancements indicate that the earthquake preparation process had brought with a TEC anomaly area of size approximately 1650 and 5700 km in the latitudinal and longitudinal directions, respectively.     

空中乘务专业考生面试技能技巧及注意事项

空中乘务专业与其他非艺术类专业的最大区别在于考生必须参加招生院校组织的专业面试,同时也与航空公司招乘面试有所不同.招生面试是有愿望就读正规院校空中乘务专业学生的必经之路,正确把握、充分准备、良好发挥,有利于在面试中得到好的印象和取得好的效果.     

大力发展技术市场 迎接知识经济挑战

扼要介绍了知识经济的概念及我国技术市场的状况；分析了技术市场对发展知识经济的重要作用，并就发展和培育技术市场、促进技术创新，提出了建议。     

IETM制作平台设计与应用

提出了一种用于大型装备的交互式电子技术手册(IETM)制作平台模型。介绍了平台的物理架构、功能架构和信息交换流程,给出了半结构化数据编辑、三维仿真和图形化故障隔离等关键技术。应用结果表明:基于新模型的IETM制作平台能快速实现电子手册制作,且展示效果和交互能力较强。     

用神经网络法编程加工轮毂上特殊曲面的探讨

根据轮毂上曲面的特殊性,提出了采用神经网络方法进行编程,实现数控加工,以取代传统的加工方法的设想。     

快速拉格朗日差分法在巷道锚杆支护计算中的应用

快速拉格朗日法是一种新型的数值计算方法。本文介绍了快速拉格朗日法的基本原理和分析过程；并将这种方法应用于巷道锚杆支护的计算中，对锚杆支护前后围岩的变形进行了对比。结果表明锚杆在控制围岩垂直方向的变形有明显的作用。     

Mathematical modeling of heat transfer process in a variable domain

In this paper, a brief review and generalization of studies on the heat transfer and heat conduction problem in a variable domain are presented. The equations of the process, where the boundary displacement velocity is the control, are obtained taking into account heat inflow. This article was submitted by the authors in English.     

语言测试及设计

在外语教学中，语言测试是不可缺少的环节之一。本文主要论述语言测试理论，如语言测试的目的、语言测试的类型、语言测试的标准；分析并总结了常见的语言测试项目的设计方法，如：多项选择题的设计、词汇测试的设计、完形测试的设计、阅读理解的设计、听力测试的设计、写作测试的设计；并对测试后得分的计算和分析进行解释。最后提出语言教师了解一点语言测试的知识是很有必要的。     

单次特快波形信号的实时传输技术

论述一种单次特快波形信号的实时传输技术，介绍弹载遥测发射设备的工作概况，该设备从射频频率的角度看，它是一种调频体制的，从射频功率的角度看，它是一种脉冲体制的。该设备不但能传输特快波形信号，而且能传输缓变的常规遥测信号，设计方案新颖，是一种多用途的弹上遥测发射设备。     

计算中心微机系统的安全运行

计算机病毒和各种人为因素的破坏，严重地影响着计算机系统的正常运行，本文提出并讨论了一些微机安全运行的技术方法，特别是硬盘“只读不写”技术的应用。这些方法能较有效地防止病毒的感染和各种人为因素的破坏，保证了微机系统的安全运行，具有一定的推广价值和实用意义。