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面向21世纪的测量工程专业教学改革的构想 总被引：1，自引：0，他引：1
本文探讨了对２１世纪对人才的要求和测量工程专业面临的挑战,讨论了面向２１世纪的测量工程专业教学改革和重组课程体系的构想。 相似文献
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赵吉先 《华东地质学院学报》1984,(1)
随着光电测距仪日益广泛地应用,如何合理的鉴定仪器,切合实际地评定测距精度,是急待解决的重要课题。本文就此问题进行初步讨论。一、精度检测光电测距仪的精度鉴定包括精度检测和检测结果的数据处理。影响测距精度的因素很多,但主要可分为五种:(1)随机误差;(2)剩余加常数误差;(3)周期误差与非线性系统误差的混合误差;(4)与距离有关的线性系统误差或称比例误差;(5)光束相位不均 相似文献
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测绘仪器发展的回顾与展望 总被引：1，自引：0，他引：1
测绘仪器是测量之本,伴随着测绘科学的发展,测绘仪器从早期的测绳、罗盘仪、游标经纬仪发展到目前的电子经伟仪、数字水准仪、全站仪、GPS以及各种电子专用仪器。大大推动了测绘工作向自动化、数字化、智能化方向发展。对测绘仪器的发展进行回顾与展望。 相似文献
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Forty four core samples were analyzed to determine sediment particle size, total organic carbon (TOC), total inorganic carbon (TIC), total nitrogen and total sulphur. Sequential extraction of S was also carried out, differentiating AVS (acid volatile sulphide), elemental S, organic S and pyrite S. The results obtained show that the presence of mussel rafts causes intense changes in the physicochemical composition and properties of the sea floor in the Ria de Arousa. The percentage of silt and clay, TOC, TIC and total N were significantly higher in the biodeposit than in the sediment. In contrast, there were no differences between the biodeposit and the sediment in terms of pH (8.0-8.7) and redox potential. The sediment and biodeposit were always anoxic, with values of redox potentials below -100 mV. In accordance with these conditions, the dominant fraction of S was pyrite S (FeS(2)). The AVS fraction and elemental S were present at low concentrations, except in the uppermost part of each core. Pyrite was relatively stable when the biodeposit and sediment were maintained in suspension for 8 days in oxic sea water; unlike the AVS fraction, which disappeared within a few hours. 相似文献
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