natural radiation background 中文意思是什麼

natural radiation background 解釋
天然放射性本底
  • natural : adj 1 自然界的；關于自然界的。2 天然的；未開墾的；野生的。3 固有的 生來的 天賦的（opp acquired）...
  • radiation : n. 1. 發光，射光，放熱，放射，發射。2. 【物理學】輻射；放射物；輻射線[熱、能]；照射（作用）。3. 【動、植】輻射形；【測】射出測量法；【醫學】射線療法。
  • background : n 1 後景，背景；基本情況；（紡織品等的）底子；出身；經歷。2 隱蔽的[不引人注目的]地位；幕後。3 襯...
  1. The use of interferometer to detect and analyze laser radiation is well known, but when the intense ratio of the laser radiation to the background natural light radiation is too small, the laser radiation cannot be detected. a novel more sensitive method for detect of wideband weak incident laser in strong background noise is introduced in this paper. the optical unit uses two wedge interferometers and two line array detectors. the incoming light radiation is divided into two beams and through the interferometers

    在被動激光偵察告警中，對微弱脈沖激光信號的探測是一個難點。當探測距離相當遠或視場內接收的背景光輻射很強時，脈沖激光信號到達探測器的能量很小，會淹沒在強大的背景光信號中而探測不到。本論文提出了一種探測微弱脈沖激光信號的方法，可對強烈背景光中的激光威脅信號進行探測和告警，並給出其波長參數。
  2. From the location and the economic strength and the technical strength and the natural resource and the foundation and the urbanization - level and the industrial structure and the land management and the administrative coordination, etc. the paper analyzes the area background and researches the advantageous and the disadvantageous conditions, then based on the analysis, the paper analyzes the formed mechanism of the city - space integration, further, from the angel of policy mechanism and the investment mechanism and the radiation mechanism the accumulation mechanism, etc. part iv : the present situational analysis of cities and towns " system and the level forecast of its integration

    這一部分對長株潭的區域背景分析是從區位、經濟實力、科技實力、自然資源、基礎設施、生態環境、城市化水平、產業結構、土地管理、行政組織協調等方面來分析長株潭城市一體化的有利和不利條件，並在此基礎上從政策機制、投資機制、輻射機制、積聚機制等方面分析了長株潭一體化的形成機制。第四部分：長株潭城鎮體系現狀分析及其一體化水平預測。
  3. The annual dose received by the public in hong kong from natural background radiation is about 2 msv

    在本港，平均每人每年吸收的天然本底輻射劑量大約為2毫希沃特。
  4. Even without these man made sources of radiation, exposed to natural background radiation. the rocks and soil of the earth s crust contain variable amounts of natural radioactive elements such as uranium and thorium. this varies with geography - for example the hottest places in britain are cornwall and around aberdeen

    就算排除人為輻射，人類會在天然環境中接觸到本底輻射，如地球外殼的巖石和泥土含有份量不同的輻射元素如鈾和釷，而份量視乎地理位置，如英國的康瓦爾和阿伯丁郡最為熱點。
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