輻射前 的英文怎麼說
中文拼音 [fúshèqián]
輻射前
英文
predose-
Bolometers and pyroelectric detectors are the most common thermal detectores in uncooled ir sensors technolgy
非製冷熱成像探測器目前以微測輻射熱計和熱釋電探測器為主流。Euratom requires that that aircraft capable of operating at altitudes of more than 49, 000 feet should be equipped with active radiation monitors. cathay pacific airways does not currently have any aircraft of this type
Euratom要求在四萬九千尺以上飛行的飛機安裝活躍輻射監測儀,國泰航空目前並無此類飛機。Starting on july 26th, researchers at the stanford synchrotron radiation laboratory in california, led by uwe bergmann, will attempt to read the final pages of the oldest known manuscript of archimedes ' s work, the archimedes palimpsest
在尤.伯格曼的帶領下,加利福尼亞的斯坦福同步加速器輻射實驗室的研究人員將於7月26日嘗試閱讀目前所知的最早的阿基米德著作的手稿- 《阿基米德》重寫本-的最後幾頁內容。Research on biological damages caused by various ionizing radiations is the frontier area of radiobiology and radiology. it is also the hot spot included in recent public focus
電離輻射所致生物損傷的研究既是放射生物學和放射醫學中重要的前沿領域,也是目前各方面所關心的熱點問題。Cadmium selenide ( cdse ) single crystal is regarded as one of the most promising materials for room temperature nuclear radiation detectors, but cdse detectors have not been studied in detail because of the lack of high quality cdse single crystals and suitable technology for this semiconductor and the devices
Cdse單晶體是最有前途的室溫核輻射探測器材料之一,但由於沒有制備出高質量的cdse單晶體,加上沒有成熟的半導體材料加工技術與器件製作工藝,人們對cdse探測器沒有進行深入的研究。In chapter one, we make a review of particle acceleration theory and the use in solar corona. in chapter two, first we get the spectrum of synchrotron radiation then obtain the electron energy spectrum. in last chapter, we select the typical solar active region parameter to compare our result to the observation and discuss the acceleration mechanism
本文第一章對粒子加速理論以及目前各種加速理論在太陽日冕中的應用作了介紹;第二章通過理論計算得到同步加速輻射譜以及電子能譜;第三章選取太陽日冕中典型參數,對同步加速輻射加速日冕快電子作了簡單討論。These may be either narrow informal elongations of the park, varying say from 200 to 500 feet in width and radiating irregularly from it, or if, unfortunately, the town is already laid out in the unhappy way that new york and brooklyn, san francisco and chicago are, and, i am glad to say, boston is not, on a plan made long years ago by a man who never saw a spring carriage and who had a conscientious dread of the graces, then we must probably adopt formal parkways
也許會有一些狹隘的不正式的對到公園路線的延長,以及從公園不規則的輻射出的200到500英尺寬不等的道路,或者,如果,不幸的是,城市已經按照一種令人不愉快的方式發展了,就像紐約,布魯克林,舊金山和芝加哥那樣,當然,我可以高興的說,這不包括波士頓,在很久以前一個無視春天的氣息並且對一切美好事物都充滿無盡的恐懼的糟老頭制定出了這糟糕的城市建設計劃,所以,我們大概必須使用正規的道路做法。At present, the solar cells used on space aircrafts are still mainly si and gaas solar cells. however, the radiation resistance ability of these two materials is poor. since the photoelectric conversion efficiency attenuates rapidly with the radiation, the lifetime of si and gaas solar cells is short and their stability is not satisfied for space applications at van allen belt
目前國內外用於航天器上的太陽電池主要為si和gaas太陽電池,但這兩種材料的抗輻射能力較差,其光電轉換效率由於高空輻射衰減很快,因而壽命短,穩定性差,不能滿足用於vanallen強輻射帶的空間應用需要。The development goal of hongtu management training company is that : within one year to reach upon the top three of training enterprises in chengdu ; to form the serve network in western region whin 8 years, and then expand the service field to the whole country progressively
宏圖管理培訓公司的發展目標是:爭取5年內做到成都地區的管理培訓企業的前三名, 8年內能形成西部地區服務網路,並逐步向全國輻射和擴大服務領域。The amplified spontaneous emission ( ase ) is studied. both the forward and backward ase is simulated and their characters are analyzed in detail. then the dual stage cascade structure is presented as a solution to reduce the ase noise
2 .研究了edfa中放大的自發輻射噪聲光( ase ) ,詳細分析了前後向ase噪聲光的性質,在此基礎上,提出了雙段級聯結構抑制ase噪聲光,並對這種方法進行了理論和實驗研究。Comparing shrinkage under bpec and conventional heating, we can conclude that obvious shrinkage occurred at relative lower temperature and velocity of shrinkage was greater under bpec heating
比較脈沖大電流和輻射加熱燒結過程中樣品的收縮,結果表明前者在相對較低的溫度即發生明顯的收縮,並且收縮速率大於後者。Using the electromagnetic radiation technology, this paper tests accurately the distribution of the stress areas in the front of the tunnelling face and on the both sides of the tunnel, confirms and estimates the reasonable hole sealing deepness of the gas pre - drawing in coal body
利用電磁輻射技術,準確測試了採掘工作面前方和巷道兩幫側的應力區分佈,確定和評價了煤體瓦斯預抽的合理封孔深度。Marburger set about defraying tensions between the laboratory and local residents. “ he built a culture that involved the community, and that just hadn ' t happened at that facility before, ” remembers scott cullen of the standing for truth about radiation ( star ) foundation, an easthampton, n. y., advocacy group that had fought the laboratory
紐約東漢普頓的尋找輻射真相基金會,曾是對抗該實驗室的團體,團員卡倫回憶說:他建立了讓社區也共同參與的一種文化,那是該機構前所未有的做法。In this study, dna strand breaks in jm109 cells caused by - rays and the protective effect of lexa protein of deinococcus radiodurans have been studied by fluorometric assay of dna unwinding., the results indicated that the rate of dna strand breaks increased with the increase of - rays dose. however, when the concentration of lexa protein from 0. 1 g / ml to 10 g / ml, it still showed no protective effect on dna strand breaks, then lexa protein of deinococcus radiodurans was n ' t radioprotector
本研究採用了dna解旋熒光法檢測由射線所致的dna鏈斷裂的損傷程度以及抗輻射菌lexa蛋白的輻射防護作用,在輻照前加入不同濃度的lexa蛋白,檢測dna鏈的斷裂,結果表明dna鏈的斷裂程度隨著射線輻照劑量的增加而增強,抗輻射菌lexa蛋白對射線所致dna鏈斷裂的修復不起作用,進一步說明抗輻射菌lexa蛋白不起輻射防護作用。Study of distribution of electromagnetic radiation of coal or rock before drivage face
掘進工作面前方電磁輻射分佈規律研究Based on the analysis and study of the primary principle and countermeasure process of the underwater acoustic countermeasure equipments, the mathematical models of the typical underwater acoustic countermeasure equipments such as the wide - band noise jammer target radiation noise simulator echo simulator and the gas bubble are presented
在詳細分析、研究水聲對抗器材有關基本概念、基本工作原理及對抗過程的基礎上,歸納、總結了噪聲干擾器、目標輻射噪聲模擬器、主動回波模擬器及氣幕彈等當前典型水聲對抗器材的數學模型。The prediction of the concentration of radioactive nuclides is the basis and premise of emergency action and radioprotection
放射性核素濃度的確定是放射性事故搶險救援和輻射防護等工作的基礎和前提,是放射性事故應急救援的重要組成部分。This was expanded into the environmental radiation monitoring programme in 1987, with the objective of measuring the environmental radiation levels in hong kong prior to and after the operation of the guangdong nuclear power plant at daya bay. air, water, soil and food samples are regularly collected for radioactivity measurement
該計劃的目的,是測量廣東大亞灣核電廠投產前後香港環境中的輻射水平,而工作項目則包括定期?集空氣、水、土壤和食物的樣本以及測量這些樣本的放射性。Except with the advantages of long range early warning and anti - stealth, rending anti - radiation missiles useless, also for its inherent flexibility and mobility that enlarge warning region, high frequency ship - borne surface wave over - the - horizon radar ( hf sswothr ) has been widely used in military domain
高頻地波艦載超視距雷達具有遠距離預警、反隱身、抗反輻射導彈攻擊等方面的顯著特點。而且載艦本身的靈活性、機動性又提供了更廣闊的警戒空間,因此它在軍事上具有廣闊的應用前景。The act of exposing to radiation or the condition of being so exposed
輻射;被輻射使暴露在輻射前的行為或被這樣輻射的狀態分享友人