有效射界 的英文怎麼說
中文拼音 [yǒuxiàoshèjiè]
有效射界
英文
effective field of fire- 有 : 有副詞[書面語] (表示整數之外再加零數): 30 有 5 thirty-five; 10 有 5年 fifteen years
- 效 : Ⅰ名詞(效果; 功用) effect; efficiency; result Ⅱ動詞1 (仿效) imitate; follow the example of 2 ...
- 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) ...
- 界 : 名詞1 (相交的地方; 劃分的界限) boundary 2 (一定的范圍) scope; extent 3 (按職業、工作或性別等...
- 有效 : effective; valid; efficacious
-
" body gamma knife is mainly used for curing all kinds of body tumors, and the latest generation three - dimensional directional actinotherapy devices. it incorporates many modern high - techs and effectively break through the limit of actinotherapy devices available while precisely focused and three - dimensional directional. it also has adjusted actinotherapy, wide range irradiation and common actinotherapy, and protects the normal organism from damage at best while its dosage precisely destroys tumor organism
「體部伽瑪刀」主要用於治療各種體部腫瘤,是目前世界上最新一代立體定向放療設備,它吸收了眾多現代高新技術成果,有效地突破了現有放射治療設備的局限,兼備精確聚焦立體定位等優點,具有適形調強放療大野照射及普通放療等多種功能,能夠在劑量準確摧毀腫瘤組織的同時,最大程度地保護正常組織免受損傷。First, it was taken that a discuss about the effects of geometry parameters of each piezocrystal on direction parameters ( main lobe width, side lobe amplitude, elimination of grating lobes ), amplitude of ultrasonic pressure, element viberation pattern, mutual radiation among elements, efficient test regions, ability to keep accurate and near - field distance and so on. based on the direction of ultrasonic field in ulpa deduced by ourselves. in addition, on the base of integrating all kinds of factors, it was put forward that the principle and method for optimized design of geometry parameters of piezocrystals in ulpa transducer, and its design programme and interface were compiled
首先在推導超聲相控線陣換能器聲場的指向性的基礎上,就各個晶片幾何參數對指向性指標(主瓣寬度、旁瓣幅度、消除柵瓣) 、聲壓幅值、陣元振動模式、陣元間互輻射、有效檢測區域、精確控制能力、近場長度等方面的影響進行了論述,並在綜合各方面影響的基礎上,提出了晶片幾何參數優化設計的原則和方法,編寫了設計程序和界面。A simply and analytical formula of the axial light intensity distribution behind a circular aperture is derived by using the helmhotz - kirchhoff integral theorem and the kirchhoff ' s boundary conditions. it is studied the nonparaxial on - axis intensity distribution throughout the whole space behind a circular aperture. an accurate formula to calculate the fresnel number of circular aperture is presented and the validity of usual fresnel number formula is reexamined. by using the analytical formula and diffraction integral formula, some numerical simulation comparisons are done, and it is shown that the results of the two methods are completely coincident
用亥姆霍茲-基爾霍夫積分定理和基爾霍夫邊界條件,推導出了平面波經小圓孔非傍軸衍射時軸上強度的簡單解析表達式,研究了平面波經小圓孔后整個衍射空間非傍軸的軸上光強分佈.給出了計算圓孔菲涅爾數的精確公式,重新檢查了通常的菲涅爾數公式的有效性.數值計算顯示,應用解析表達式所得的結果與應用衍射積分公式所得的結果完全一致The melted tungsten carbide would react with the steel matrix on the interface and the reaction zone was observed as a result. the reacting production was examined as fe3w3c by means of x - ray diffraction and scanning electron microscopy analysis. the reaction between tungsten particle and steel matrix could improve the interfacial bonding strength remarkably
Wc鋼復合材料的制備過程中, wc顆粒在高溫下發生了局部溶解並在wc顆粒和鋼基體界面處發生了界面反應; x射線衍射和電子衍射花樣分析表明,反應產物為高穩定性的fe _ 3w _ 3c ,界面反應有效地改善了wc顆粒與鋼基體的界面結合。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。On the purpose of catching up with the advanced level of the world, and developing microinjection devices of ourselves to promote the chinese gene engineering, this paper is dedicated to the design and fabrication of the microinjection volume controller and the research on the detection of microinjection volume by micro - vision, based on looking into the advanced products mentioned above and researches on the dynamical characteristics of the dna micro - fluid from both theoretical and experimental aspects
為了追趕世界先進水平,同時也為了開發具有中國特色的顯微注射設備,以推動我國基因工程的發展,本論文在深入調查了解國外先進產品,以及從理論及實驗方面對dna微流體的動力學特性進行研究的基礎上,致力於微注射量控制器的設計與研製,以及顯微視覺檢測技術的研究,以便對其進行更有效、更精確的定量控制。The finite difference beam propagation method ( fd - bpm ) can simulate the performance of the waveguide accurately. single mode rid waveguide structure parameters are derived by variational - effective index method ; fd - bpm and its transparent boundary condition ( tbc ) are concerned, and then the eim used to transfer a 3d waveguide to 2d waveguide is analyzed ; finally we summarize the characteristic of the y branch
本文先利用變分有效折射率法推導出滿足單模傳輸的脊形波導結構參數;接著介紹了有限差分束傳播法及求解的透明邊界條件,同時分析了將三維結構轉化為二維結構的有效折射率法,最後對y分支的特性進行了模擬。At present the fractal based applications in image domain are approximately classified into two categories : according to the characteristic of self - similar of fractal, people imitate and compress the natural image using mapping transformation method. this is one category. the other is according to the features of fractal and fractal dimension, people set up image models, investigate the main geometric features of the images and process them effectively
目前分形在圖像中的應用大致可以概括為兩類:一類是利用分形的自相似特性,採用映射變換的方法對自然界景物進行模擬,對圖像進行壓縮編碼;另一類是根據分形及分數維的特徵參量來建立模型,通過對模型參數的研究,有效地進行圖像分析和處理。We derived theory for abstraction of bandwidth resource and characterization of system capacity for multi - class fading system. bandwidth resources allocated to a user can be abstracted as effective bandwidth, determined by the user ’ s source data rate and target bit error rate. system capacity can be characterized by a theoretical bound. simulations show that actual system capacity is close to the theoretical bound
為一個用戶所分配的帶寬資源被表示為有效帶寬,用戶對數據速率和比特誤碼率的要求決定了對有效帶寬的要求。利用有效帶寬的概念來描述系統的用戶容量並給出了系統容量的理論界限,進一步地,還得到了系統存在發射功率限制時的容量界限。The snapshots of the theoretical and salt model show that they reduce artificial reflections to a great extent and absorb energy over a wide range of incident angles
理論模型及三維鹽丘地質模型波場切片快照試算結果表明,該吸收邊界條件可以有效地吸收人為邊界反射,適用於較大入射角情況,從而消除了邊界有效波信息的干擾。It was found that after our careful processing of the absorption boundary for artificial reflection, we could use the time - trace records at the surface to invert the locations of seismic sources or underground scatterer accurately
經由適當的消除人為邊界反射,在只利用地表的歷時記錄即有效的推求出震源及散射體的精確立置。In the following section, the thesis demonstrated the robustness of the proposed method in the computation of radiated electromagnetic fields of switched mode power supplies by means of a numerical study on the electromagnetic fields of an electric dipole antenna
應用本文開發基於pml吸收邊界條件三維時域有限差分計算軟體,計算了電偶極子天線的三維輻射電磁場,並將計算結果與解析解進行了對比分析,驗證了時域有限差分法計算高頻開關電源輻射電磁干擾的有效性。The satellite launch effectively started the " space race " and ignited the imaginations of men, women and children around the world for the possibility of space travel
衛星的發射有效地啟動了「空間競賽」並且點燃了世界上男人、婦女以及兒童們太空旅遊無盡的幻想。The processing of the field gpr profile in the limestone region with this program demonstrates that coherent enhancement processing of the gpr profile can effectively improve the continuation of the events reflected from the same interface and contribute to tracing the reflecting interface without the distortion of the event form
對實測雷達剖面進行處理的結果表明:雷達記錄道相干加強處理能有效改善來自同一界面的雷達反射波同相軸的連續性,有利於反射界面的追蹤,同時不會引起同相軸的形態發生畸變。At first, it describes structure of the full - length prototype, manufacturing craft and prepare to work, including sting, sealing, wire tension and leak current measurement, mounting of the preamp, gas system, high voltage system, reduction of noise and so on. the construction of full - length prototype provided valuable experience and important reference to the besiii drift chamber. then good function of the full - length prototype was performed using 55fe 5. 9kev x _ ray source. we can see that the uniformity of gas gain of the full - length prototype is well and it is effective for the compensation voltage to adjust the uniformity of gas gain of the boundary cells
為了初步測試模型的性能用55fe5 . 9kevx射線進行了氣體增益的均勻性檢測,隨之用55fe5 . 5kevx射線初步測試了模型性能,對部分高壓和補償電壓的設置進行了調整,驗證了對邊界場絲層加補償電壓能夠有效地調節邊緣層氣體增益的均勻性,實驗結果表明全長模型能正常工作並具有良好的性能。It is not only a radiotherapy reform but a practical and effective treatment that the moulding of low - melting - point lead is used to supplement conventional and normal lead block
摘要用低熔點鉛合金澆鑄的辦法補充傳統的標準式鉛擋,是放射治療界進行普通放療的一項改革,也是一種切實有效的治療方案。The comprehensive treatment of a variety of approximate boundary conditions, such as : standard boundary condition ( sibc ), generalized boundary condition and exact boundary condition, applied to electromagnetic
阻抗邊界條件為分析塗敷目標的散射特性、評估不同塗敷形式的效果優劣提供了簡捷而有效的計算方法。Two different reinforcing methodologies are applied : modification of the overlay characteristics by adding chopped glass fibers to the hot mixture asphalt ( hma ) and reinforcing asphalt overlay with glass grids. theory of fracture mechanics ( fm ) is employed to determine crack growth rates for the suggested anti - cracking overlay systems. asphalt mixture designing tests, three point bending tests and fatigue crack propagation tests were carried out. the critical stress intensity factors kic are determined for plain and reinforced asphalt concrete. depending on the fatigue crack propagation, the crack growth rate is determined for each type of anti - cracking system and the cracking process is also analyzed. one of the significant points in this study is the attempt to give better understanding of the crack propagation for multilayer asphaltic overlay or what are suggested herein to be called composite structure anti - cracking overlay system. the results indicate that the reinforcing materials improve anti - cracking characteristics of the asphalt concrete. composite structure anti - cracking overlay gives a good solution for the reflective cracking phenomenon over old cracked pavements
利用2種不同的方法加筋瀝青罩面:在瀝青混合料中加入短切玻璃纖維改善瀝青混凝土的特性,採用玻璃格珊加筋瀝青混凝土.應用斷裂力學方法分析瀝青路面裂縫擴展機理.採用瀝青混合料設計試驗、三點彎曲試驗和疲勞裂縫擴展試驗,確定加筋瀝青混凝土的臨界應力強度因子kic ,測量每一種瀝青罩面抗裂系統的裂縫擴展速率.本研究的主要特點是提出復合型抗裂罩面系統,分析了多層加筋瀝青罩面裂縫擴展過程,推薦了若干瀝青路面抗裂系統.結果證明,加筋材料可以提高瀝青罩面的抗裂特性,復合型抗裂罩面系統能夠有效地阻止反射裂縫的擴展A rectangular box simulating the axial box of the lathe tool is manufactured ; experimental measurements of the surface vibration on the rectangular box and the acoustic field around the rectangular box corresponding to firstly a series of a homogeneous excitation and secondly two iii independent white noise excitations are taken in a semi - anechoic chamber. taking the vibratory properties as input, the properties of the sound field are calculated by the evsbpm and the sdsbpm respectively. the effectiveness and reliability of the evsbpm and the sdsbpm for the calculation of acoustic radiation problem is further verified from the comparison of the calculated results and measured ones
第五章設計加工了一模擬機床主軸箱的長方箱體,在半消聲室環境下,分別對其在單點處一系列簡諧激勵作用下和兩點處的獨立白噪聲激勵作用下的振動及其輻射聲場進行了實驗研究和分析計算,通過計算結果和實測值之間的比較,進一步驗證了改進體積源邊界合肥工業大學搏士學位論文點方法和統計分佈源邊界點方法計算振動聲輻射問題的有效性和可靠性。The technique is employed to analyze the electromagnetic scattering characteristics of anisotropic dielectric - filled apertures in grounded plane. the obtained results show that the proposed technique is accurate and efficient
本文應用矢量有限元?邊界積分法分析了無窮大接地平面上的各向異性介質填充縫隙的電磁散射特性,數值結果表明這種方法是有效的。分享友人