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楼主: ARSON
发表于 2025-3-23 13:43:07 | 显示全部楼层
发表于 2025-3-23 17:44:36 | 显示全部楼层
Introducing Hive,As much as the Hadoop ecosystem evolves and provides exceptional means to access new types of data and structures, we cannot deny the influence and purpose of traditional relational systems. Relational systems and especially the data access methods employed by these systems have served as a valuable tool for over 30 years.
发表于 2025-3-23 21:54:22 | 显示全部楼层
Periodische Schwingungen,In Abb.4.1 sind drei periodische Schwingungen über der Zeit t aufgetragen.
发表于 2025-3-24 00:17:15 | 显示全部楼层
发表于 2025-3-24 04:31:43 | 显示全部楼层
Atomic Absorption: A Brief Note,The technique of quantitative atomic-absorption spectrometry has been described flippantly, but fairly correctly, as ‘cashing-in on Fraunhofer’. Dr A. Walsh (1955) pioneered it in Australia.
发表于 2025-3-24 10:28:11 | 显示全部楼层
,Dauerströme,a) Ein klassisches Hilfsmittel zur Behandlung elektromagnetischer Probleme bilden das Vektorpotential A in Gemeinschaft mit dem skalaren Potential φ. Im statischen Fall geht letzteres in das elektrostatische Potential über, hat aber darüber hinaus eine allumfassende Bedeutung. Man definiert A und φ, indem man fordert:
发表于 2025-3-24 13:03:17 | 显示全部楼层
Photo-Detectors,Apart from the trained eye and the photographic plate, which have been briefly dealt with in Chapters 5 and 4, there are three methods of light detection commonly used in the UV and visible: (1) Photo-conductive; (2) Photo-voltaic; (3) Photo-emissive.
发表于 2025-3-24 15:47:30 | 显示全部楼层
发表于 2025-3-24 19:04:30 | 显示全部楼层
Units and Notation,Except when re-emission occurs (by fluorescence, for instance) the wavelength of a light ray does not change as a result of absorption. The intensity does.
发表于 2025-3-25 01:42:23 | 显示全部楼层
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