無用輻射 的英文怎麼說

中文拼音 [wúyòngfúshè]
無用輻射 英文
unwanted radiation
  • 無 : 無Ⅰ動詞（沒有） not have; there is not; be without Ⅱ名詞1 （沒有） nothing; nil 2 （姓氏） a surn...
  • 用 : Ⅰ動詞1 （使用） use; employ; apply 2 （多用於否定: 需要） need 3 （敬辭: 吃; 喝） eat; drink Ⅱ名...
  • 輻 : 名詞（車輪中車轂和輪圈的連接物） spoke
  • 射 : Ⅰ動詞1 （用推力或彈力送出） shoot; fire 2 （液體受到壓力迅速擠出） discharge in a jet 3 （放出） ...
  • 無用 : useless; of no use
  • 輻射 : radiation; exposure; radio; beaming
  1. Compared with traditional mechanical and optic gyros, hrg has such advantages as no high speed circumvolving or moving parts in structure, no warm - up time and short start - up time, wide signal band in frequency, low excursion noises, great endurance in over loading, nuclear radiation and short time power off, small bulk, light weight, low power cost and long life, which is suitable for space applications

    與傳統的機械陀螺和光學陀螺相比，半球諧振陀螺具有如下優勢:結構上無高速轉子、無活動部件;不需預熱，啟動時間短;信號頻帶寬，漂移噪聲低;能承受大的機動過載;抗核輻射，並可經受短時間電源中斷的影響;體積小，重量輕，功耗低，壽命長，非常適合空間應用。
  2. Characteristics of heat balance parameters of arctic ocean drifting ice and open sea are presented based on the profile - flux method and the data obtained by the first chinese national arctic research expedition during aug. 19 24, 1999

    利用中國首次北極考察隊於1999年8月19日24日在北冰洋浮冰區獲得的大氣近地層垂直廓線和輻射等資料，依據相似理論方法，對比分析了北冰洋無冰海面和冰面上熱平衡參數的變化特徵。
  3. Deliberate radiation or reradiation of electromagnetic waves so as to impair the usefulness of a specific segment of the radio spectrum that is being used by the enemy for communication or radar

    人為地輻射或反向輻射電磁波，使一段特定的無線電波譜的可用性削弱，而這一波譜段是由敵人的通訊或雷達所使用。
  4. 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。
  5. The temperature distribution on the high temperature side of an electric tunnel furnace is analysed and simulated on the basis of the principle of thermal radiation by the way of thb ( thermal heat balance ). the heated silicon carbon sticks are decomposed into innumerable tiny heating faces, which exchange the heat with the heated materials. a numerical model based on the radiation intensity law is constructed to calculate the energy absorbed by the heated materials and simulated by a computer. the results showed that the even distribution of temperature can be obtained by optimizing the arrangement of the silicon carbon sticks according to the calculation results to make the structure design more reasonable. these calculation results have been used in the practical designs and the expected objectives achieved

    利用熱輻射原理，採用熱平衡法對電熱隧道窯的高溫恆溫區溫場進行了分析和模擬.計算中將發熱棒分解為無數微元發熱面與燒結體進行熱交換，依據輻射強度定律，建立了燒結體接收能量的數學模型，並用計算機進行了模擬計算.結果表明，依據模擬結果來優化硅碳棒的排布，可使結構設計更加合理，進而可以獲得分佈均勻的恆溫區溫場.計算結果已在窯爐設計中應用，實踐效果良好
  6. Non - destructive testing. industrial neutron radiography. determination of the speed and average contrast of silver based film image reception systems using electrons with an energy less than 200 kev

    無損檢驗.工業用中子輻射照相術.用能量低於200kev的電子進行銀鹽底片圖象接收系統的感光度和反差平均值的測定
  7. Firstly it discusses the value, meaning, background and method of this topic. then it deducts the single - bubble sound pressure, spectrum of sound pressure, power spectrum. according to the real situation of traveling bubble cavitation noise around a schiebe body, the mathematical model of single - bubble collapse is selected, furthermore, the mathematical model of mass traveling bubbles without interference effect is established, and the multi - peaks and rebound phenomenon while bubbles collapse is also analyzed with statistical method

    首先論證了本項研究的意義，價值，背景和方法，然後推出了單空泡輻射噪聲聲壓，聲壓譜和功率譜，針對回轉體流動泡空化噪聲的具體情況，選擇了雙指數模型作為單空泡潰滅的數學模型，進一步建立了無干涉條件下的群泡輻射噪聲的數學模型，並用統計的方法分析了空泡潰滅時的多峰值和反彈現象。
  8. Backed up by the soplat theory based on particle kinematics, the second chapter of this paper presents with analysis and simulation of several single observer passive measurement models, which uses such relative movement parameters as bearings changing rates and centrifugal acceleration information on the basis of bearings measurements. in the third chapter, the observability of location respectively using bearings and its changing rates information and centrifugal acceleration information is analyzed, and its observable condition is got. the fourth chapter puts forward the modified covariance extended kalman filtering ( mvekf ) against the defect of traditional extended kalman filtering ( ekf ), whose performance is simultaneously compared in the chapter with the performance of ususal tracking algorithm such as ekf, mgekf, iekf by computer simulation

    在近年來提出的基於質點運動學原理的單站無源定位理論基礎上，本文第二章提出了幾種在角度測量的基礎上增加角度變化率及相對運動的離心加速度等運動學參數的單站無源測量模型，並對它們進行了分析和模擬；第三章分別對利用角度及其變化率信息定位和利用離心加速度信息定位的可觀測性進行分析並得到了相應的可觀測條件；第四章針對傳統擴展卡爾曼（ ekf ）方法的缺點，提出了一種修正協方差的擴展卡爾曼濾波（ mvefk ）方法，並將其和ekf 、 mgekf 、 iekf等常用的單站無源定位濾波方法進行了性能模擬比較；第五章通過引入雷達機動目標跟蹤方法和模型，提出了利用角度及其變化率對機動輻射源跟蹤的多級噪聲自適應方法和imm方法；第六章主要對角度變化率和離心加速度參數的獲取技術進行了研究，提出了幾種高精度測量脈沖序列多普勒頻率變化率的方法。
  9. Abstract : in the field of optical wireless links, concentrators that are designed by the tools of nonimaging optics can be used to collect the light radiation and are more compact and have higher collection efficiencies than imaging concentrators. hemispherical concentrators are studied by ray tracing, then for several normal nonimaging concentrators : hemispherical concentrators, compound parabolic concentrators ( cpc ), dielectric totally internally reflecting concentrators ( dtirc ), simultaneous multiple surfaces concentrators ( sms ) and inhomogeneous media concentrators ( poisson bracket ), the design methods and the performances e. g. the gain and the field of view ( fov ) are compared as well as the application suggestion

    文摘:在無線光通信領域，利用非成像光學設計的集中器能夠聚集光輻射能量，而且相對于成像性集中器具有更緊湊的結構和更高的增益.利用光線追跡法對半球形集中器的性質進行了分析與研究.對好幾種非成像集中器:半球形集中器，復合拋物線形集中器，介質內部全反射集中器，多表面集中器，多相介質集中器，從設計原理、增益和視場進行比較，並分析其應用場合
  10. Because of the large advantage in the analysis of electromagnetic scattering and radiation problem, using the time domain integral equation ( tdie ) solving every structure of objects ’ scattering become to an important direction in computation electromagnetics, but the classical mot ( marching - on - in - time ) - based tdie solvers have a drawback : the late time stability problems

    由於時域積分方程對于分析電磁散射、輻射問題有著無可比擬的優勢，利用時域積分方程求解各種結構體目標散射成為計算電磁學領域中一個非常重要的方向。但是傳統的時間步進法求解時域積分方程存在致命缺點:后時穩定性不好。
  11. The transpiration of neorgelia carolinae meyendor ffii was not distinctly affect hi by enhanced uv - b radiation in a short - term, yet it was increased initially and then decreased with the increase of exposure time, and the greater decrease with higher uv - b radiation

    短期內uv - b輻射對紅彩鳳梨的蒸騰作用無明顯影響，但隨時間的延長，其蒸騰作用先增強后減弱，且隨uv - b輻射的強度的增加其減弱的程度加劇。
  12. This dissertation presents an improved method to study distribution network reconfiguration ( dnrc ) based on a refined genetic algorithm ( rga ). structure variable dissipated network ( svdn ) is applied as simplified model of distribution network

    採用變結構耗散網路作為配電網簡化模型，並在該模型的基礎上實現了網路接線分析、網路輻射狀和無孤島判斷演算法。
  13. When they were respectively used as separator in zn / k2feo4 battery, the percent of capacity of the cathode active material na2feo4 were : microfiber glass mat ' s : 93 % ; polyethylene ' s : 68 % ; polypropylene ' s : 56 % ; polyvinyl chloride ' s : 47 % ; vinylon ' s : 38 % ; soapnated cellulose acetate ' s : 24 %. although five of them ( not concluding soapnated cellulose acetate ) had very weak or weaker reductivity as separator in super - iron battery, for which th ey were more suitable to being separator in super - iron battery

    作為隔膜用於zn k _ 2feo _ 4實驗電池，正極活性物質k _ 2feo _ 4的放電容量效率分別為復合玻璃纖維膜93 、輻射接枝聚乙烯膜68 、改性聚丙烯微孔膜56 、聚氯乙烯微孔膜47 、維尼綸無紡布38 、皂化再生纖維素膜24 。
  14. Start with a hands - free headset, which may minimize exposure to radiation

    使用無需手持的耳機能使接觸輻射量降至最低。
  15. Results are presented for the sound radiation efficiency and power of the modes of the rectangular baffled plate subjected to simply - supported boundary conditions when the plate is excited by obliquely incident plane wave

    通過計算，得到了嵌在無限大障板中簡支板模型在斜波入射作用下的聲輻射功率和輻射效率。
  16. In this dissertation, the numerical computation for the acoustic radiation problem ( arp ) is studied deeply and systematically in the theory, method and the application technique, based on analyzing the situation of the home and abroad on the numerical computation for the acoustic radiation problem. the calculation formulas of the boundary element method ( bem ) for the exterior acoustic radiation problem in the full - space and half - space are deduced, based on the wave propagation theorem ; the arising of the non - unique solutions, which is associated with the application of the boundary integral equation ( bie ) in acoustic radiation problem, is analyzed and proofed ; the improved combined helmholtz integral equation formulation ( ichief ) is presented to overcome the non - uniqueness problem more effectively and reliably ; the determination of the singular integral coefficients on various occasions is analyzed ; the properties and treatments of the singular integrals with different orders axe studied ; the computation program of the cubic spline ichief is developed and its ability to overcome the non - uniqueness problem and feasibility to discrete the surface coarsely with the sufficient calculation precision are examined through examples

    第二章在聲波動理論基礎上，詳細地推導出對應于無限域和半無限域的外部振動聲輻射問題的邊界積分方程計算公式；根據fredholm積分理論，對利用邊界積分方程計算振動聲輻射問題過程中解的非唯一性的產生進行了分析和證明；改進了chief法以提高其克服解的非唯一性的有效性和可靠性；對不同條件下奇性系數的計算、強奇性積分的收斂性及其在變量替換時與普通積分的差異性、不同階奇性積分的計算、數值求積分等進行了研究；開發了三次樣條改進chief法計算軟體，並通過算例考核了該方法在特徵波數處克服解的非唯一性的有效性和在保證計算精度的前提下實現剖分粗化以提高計算效率的可行性。
  17. The thermal wave nondestructive testing technology based on emissivity of the object, it can find surface and subsurface flaws in the composites of airplane through measuring difference in temperature between flaws and materials by active heating methods and inspection system

    摘要紅外熱波無損檢測基於物體的熱輻射特性，利用主動加熱技術，通過相關的檢測系統記錄試件表面缺陷和基體材料由於不同熱特性引起的溫度差異，進而判定飛機復合材料表面及內部的損傷。
  18. Specification for dedicated liquefied petroleum gas appliances - parasol patio heaters - fluesless radiant heaters for outdoor or amply ventilated area use

    專用液化石油氣裝置規范.傘狀庭院加熱器.室外或充分通風區域使用的無煙輻射加熱器
  19. Radiation protection instrumentation - apparatus for non - destructive radiation tests of fur and other cloth samples

    輻射防護裝置.毛皮和其它織物樣品的無害輻射試驗用裝置
  20. These examinations may involve irradiation and some are invasive and traumatic. whereas cardiovascular mri imaging is totally non invasive and does not involve irradiation

    當中一些檢查需使用輻射，也有介入性和創傷性，而用mri作心臟的檢查則完全無輻射、無介入性。
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