信息产业发展的趋势与我国的对策研究

本文通过分析世界信息产业的发展趋势,指出我国与美国等发达国家之间存在的巨大差距,并提出了充分发挥我国工业对信息产业发展的基础作用,推动工业与信息产业的互相促进、协调发展,选择电子信息产业作为信息产业的重点等加快我国信息产业发展的途径。     

Determinants and correlates of language shift among the tribals of Central India

Language shift from traditional language to non-traditional has become an important aspect of the study in various disciplines including social and regional sciences besides linguistics. The geographers have studied the patterns of spatial distribution and the processes through which the shift occurs and also analysed the factors which are responsible for the shift. Socio-economic and political implications of the shift have been adequately emphasized in geographical studies. The present study is an attempt in this direction by selecting some of the important tribal groups of Central India. The paper attempts to establish the relationship between language shift and socio-economic conditions among the Bhils, the Korkus, the Mundas and the Santals of Central India. The stepwise regression model has been applied to understand the causality of the shift while the degree of linguistic exposure has been calculated to determine the magnitude of language shift among them for a comparative analysis. Both primary and secondary data have been analysed for this study. Though language shift among the tribal population has exposed them to the outside world and helped them to achieve higher levels of socio-economic development, its consequences seem to be more serious as it has led to the division of the tribal society and formation of separate groups of people who have been alienated from the traditional people. Thus, the process of linguistic shift is held responsible for the loss of tribal identity and their traditional culture. This revised version was published online in August 2006 with corrections to the Cover Date.     

浙北沿海一次多单体线性风暴天气过程分析

本文应用2003年8月8～11日的欧亚环境场资料,对浙北沿海一次多单体线性风暴天气过程的发生成因进行诊断分析;从物理量因子方面讨论强对流天气的预报指标与着眼点;最后探讨了云图和回波的一些特征.     

电子经纬仪用于抛物面天线检测

文中介绍了T2000电子经纬仪和PC—1500计算机联机系统的组成和功能,分析了三维角度交会的原理及精度,提出了交会法进行天线校准测量的数据处理方案,并探讨了各项误差对校准测量的影响。     

贡嘎山海螺沟冰川冰舌地段的泥石流

海螺沟冰川冰舌地段1976年以来发生过两次大的冰雪雨水泥石流。1989年7月8日和26日观景台西沟的泥石流通过1.7km长的冰面后,在冰川末端前形成一个5.5×10~4m~3的扇形地;1976年8月长草坝3号冰川下部冰碛体边坡的两处滑坡泥石流在开阔地上扩散堆积后,达1317.8m~3/s的泥石流和洪水下到冰川上。今后每年雨季还有可能发生更大规模的泥石流,值得人们警惕。     

Study on the change of Keqikaer Glacier during the last 30 years,Mt. Tuomuer,Western China

Using radio echo sounder, ice thickness of Keqikaer Glacier tongue was measured in 1981 and 2004. Data obtained by comparing topographical maps, aerial and satellite photographs at different times, illustrates changes of the thickness and advance/retreat of Keqikaer Glacier. Keqikaer Glacier has been in intensive retreat since the 1990s and become thinner since the 1980s. Measured thickness of the ice tongue indicates reducing with a speed of 0.5–1.5 m a⁻¹ since 1981. The shrinkage of the glacier terminus is less than 2% of the total length during the last 30 years; however, the retreat of terminus position and the thinning of the ice thickness provides significant information that these glaciers on the south slope of Mt. Tuomuer are in an intensively decreasing phase in recent time.     

电子水准仪观测资料处理系统的研制

本文着眼于台站水准数字化改造的实际需要，对电子水准仪投入使用前及使用中所涉及的仪器检查项目和观测数据的后续处理工作进行二次开发，研制了“电子水准仪观测资料处理系统”。该系统包括仪器检查、观测成果处理和绘图三部分。使台站水准测量结束了人工读数、手工记录和点图、人工计算的历史，实现了电子水准仪观测资料处理的微机化和自动化。     

GPS车载导航系统技术趋势浅析

本文通过对GPS车载导航系统的构成及其国内外发展现状的分析,阐明了我国GPS车载导航系统将向信息终端融合化、交通信息实时化、信息服务平台化、数据更新网络化方向发展的技术趋势。     

测绘电子词典的研制

文中介绍了测绘电子词典的设计和实现方法。     

地震计自噪声的研究

仪器的固有噪声水平是地震计的关键技术指标。 如何降低仪器的自噪声是地震计设计中需要解决的重要问题。 本文分析了产生地震计自噪声的两个主要噪声源: 布朗热噪声和电子噪声(1/f噪声), 以及它们对地震计传递函数的影响。 分析了三种地震计所记录的地震台台基噪声, 并且通过试验来检验仪器噪声对地震计观测数据的影响。