GNSS软件无线电接收机及典型案例

介绍了GNSS软件无线电接收机和它与传统接收机相比的优缺点，并引述了典型的GNSS软件接收机及其应用。     

学习向量量化神经网络在多波束底质分类中的应用研究

利用多波束测深系统获取的反向散射强度数据，应用学习向量量化（learning vector quantization，LVQ）神经网络分类方法实现了对海底砂、砾石和基岩等底质类型的快速、有效的识别。通过比较，证明了该方法能较好地区分出不同海底底质类型。     

Ashtech MDXII GPS接收机周期性零基线检验的结果分析

本文首先阐述GPS接收机检验工作的重要性，接着说明零基线检验的方法和目的，提供AshtechMDXII周期性零基线检验成果，并对它们进行了分析，在此基础上提出若干结论和建议，以期推动GPS接收机检验原理、方法的发展．     

西沙海槽海域地形地貌特征及成因

应用多波束测量资料绘制了详细的西沙海槽海域地形图、地貌图,并把研究区划分为3个地貌单元。其中陆坡斜坡位于北部,呈北东向延伸,地形较为简单,斜坡面单一平整,地貌类型单一,主要为堆积型斜坡;西沙海槽位于中部,呈北东东向延伸,地形起伏较大,主要由槽底平原和槽坡组成,且在槽坡上发育陡坎、冲刷沟谷、阶地等次一级地貌类型;西沙海台位于南部,呈近东西向展布,地形变化复杂,地貌类型众多,表现为海山、海丘、小台地、洼地等相间排列的波状起伏的地貌特征。地貌形成与演化主要受南海新生代两次海底扩张控制。第1次海底扩张期间,西沙海槽可能已开始发生张裂。第2次海底扩张期间,西沙海槽分3个阶段发生张裂断陷,而且其强弱在东西方向上差别巨大,致使形成了现今东深西浅、东窄西宽、槽壁陡峭的近东西向延伸的海槽地貌,奠定了研究区内地貌的基本轮廓。而地质构造、火山活动、海平面变化等内外营力的共同作用则控制次级地貌类型的形成与演化。     

Lithospheric structure of the Arabian and Eurasian collision zone in eastern Turkey from S-wave receiver functions

Crustal and upper-mantle seismic discontinuities beneath eastern Turkey are imaged using teleseismic S -to- P converted phases. Three crustal phases are observed: the Moho with depth ranging between 30 and 55 km, indicating variable tectonic regimes within this continental collision zone; an upper-crustal discontinuity at approximately 10 km depth; and various crustal low-velocity zones, possibly associated with recent Quaternary volcanism. Imaging of the upper mantle is complicated by the 3-D geometry of the region, in particular due to the Bitlis–Zagros suture zone. However, several upper-mantle S -to- P converted phase are identified as being the signature of the lithosphere–asthenosphere boundary (LAB). The inferred LAB for the Eastern Anatolian Accretionary Complex indicates that eastern Turkey has an anomalously thin (between ∼60 and 80 km) lithosphere which is consistent with an oceanic slab detachment model. The observed LAB phases for the Arabian shield and Iranian plateau indicate that lithospheric thickness for these stable regions is on the order of 100 to 125 km thick, which is typical of continental margins.     

PC104串行通信的应用

作者在文中详细阐述了PC104工控机串口的结构和工作机理，探讨了UART异步通信适配器的结构组成，并把该串口通信应用于MCA上，使数据采集仪器结构简单、轻便、体积缩小，便于携带和现场采集应用。     

卫星导航设备收发链路时延测量方法研究

导航设备的时延标定与测量技术水平直接影响着导航系统的性能、精度,阐述了导航设备时延的概念,重点分析了使用时延测量设备进行导航设备收发链路时延测量与标定的具体方法。基于该方法进行了导航设备时延测量有效性和准确性实验。实验结果表明了使用时延测量设备进行时延测量与标定的优越性。     

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