雜散發射 的英文怎麼說
中文拼音 [zásǎnfāshè]
雜散發射
英文
spurious emission-
New york ( reuters health ), feb 15 - in infants with congenital hyperinsulinism, positron - emission tomography ( pet ) scans can accurately differentiate between focal and diffuse disease, and pinpoint focal lesions, according to a study published in the february issue of the journal of pediatrics
紐約（路透社健康專欄） ， 2 . 15 - - -根據發表在兒科雜志二月刊上的一項研究，對于有先天性高胰島素血癥的嬰兒，正電子發射斷層掃描（ pet ）可以準確的區分病灶和彌散性疾病，並且精確地找到局灶性損害位置。Using the trial - solution method under specific boundary conditions, the diffusion equations were derived of chlorine, singlet oxygen, and total oxygen in gas and liquid phases
在實際工作中的射流發生器非常復雜，其擴散方程和邊界條件為非線性，非齊次邊界條件，非齊次泛定方程組，求解難度較大。First, in virtual of identification of flaws is a typical of in - verse problems, proceeding from time - harmonic electromagnetic maxwell ' s equa - tion and helmholtz equation, the uniqueness and existence of direct scattering problems including the numerical algorithms of diverse of boundary conditions is given. second, the uniqueness and existence of inverse scattering problems and the theory of ill - posed integral equation are briefly looked back upon. finally, indicator function method for boundary identification is set up under all kinds of boundary conditions for inverse scattering of homogenous and inhomogenous objects, meanwhile, the proof of possibility for near - field measurements and nu - merical simulation are given
由於缺陷的識別是一類典型的反問題，因而首先從時諧電磁maxwell方程和helmholz方程出發，具體地闡述了求解正散射問題的有關方法，包括各種（夾雜）邊界條件下的數值解法，就解的存在性唯一性給予了肯定的回答；隨后對逆散射問題的理論作了簡短的回顧，包括解的唯一性以及非線性不適定積分方程的處理等；然後對均勻介質和非均勻介質的逆散射問題建立了在各種邊界條件下的邊界識別的指示函數方法，鑒于近場數據獲得的重要性，對近場測試時邊界識別的方法給予了相應的證明，並且實現了數值模擬。At the initial stage of planar technique, b was employed as ideal diffusion impurity in base - region of npn si planar devices because of the match of its solid - solubility and diffusion coefficient in si with those of p in emission - region, and the good shield effect of sio2 film to b. but because of the relatively large solubility ( 5 1020 / cm3 at 1000 ) and the small diffusion coefficient, the linear slowly - changed distribution of acceptor b in pn junction can not be formed, which could not cater to the requirement of high - reversal - voltage devics. thereafter b - a1 paste - layer diffusion technology and close - tube ga - diffusion technology had been developed, while the former can lead to relatively large the base - region deviation and abruptly varied region in si, which caused severe decentralization of current amplification parameter, bad thermal stability and high tr ; the latter needed the relatively difficult pack technique, with poor repeatability, high rejection ratio, and poor diffusion quality and productio n efficiency
在平面工藝初期，由於b在硅中的固溶度、擴散系數與n型發射區的磷相匹配， sio _ 2對其又有良好的掩蔽作用，早被選為npn硅平面器件的理想基區擴散源，但b在硅中的固溶度大（ 1000時達到5 10 ~ （ 20 ） ，擴散系數小， b在硅中的雜質分佈不易形成pn結中雜質的線性緩變分佈，導致器件不能滿足高反壓的要求，隨之又出現了硼鋁塗層擴散工藝和閉管擴鎵工藝，前者會引起較大的基區偏差，雜質在硅內存在突變區域，導致放大系數分散嚴重，下降時間t _ f值較高，熱穩定性差；後者需要難度較大的真空封管技術，工藝重復性差，報廢率高，在擴散質量、生產效率諸方面均不能令人滿意。When various diameter particles are irradiated by a collimated laser light beam, light scattering phenomenon takes place, and the scattering light parameter include the information of the particles size distribution. mie scattering theory is the fundamental principle of the particle size measuring instruments and its computations are complicate
微型化霧粒粒徑分佈測量儀的測量原理是米氏光散射理論，當不同粒徑的顆粒被平行激光束照射后，發生光散射現象，散射光的參數包含有被測顆粒粒徑的信息，但其數值計算量大且復雜。Conducted spurious emission
傳導雜散發射Radiated spurious emission
輻射雜散發射The investigation is very useful not only in further studying the electromagnetic scattering characteristics of complicated large objects over the whole frequency band, but also in improving and designing the wide - band radar, ultra wide - band radar and new wide - band radar absorbing material
本文的研究，為今後進一步開展復雜電大目標全頻段電磁散射特性的研究提奠定了基礎，為寬帶雷達和超寬帶雷達的設計與開發，新型寬頻帶隱身材料的研究提供理論指導。We also experimentally observed the effect of sodium atom - molecular collisions and sodium atom - atom collisions on the line - shape and intensity of fluorescence spectra. in addition, the optically pumped infrared stimulated emission and energy transfer up - conversion process are observed in pr3 + : y2sio5, and with the threshold energy, temperature dependence and divergence angle for the stimulated radiation are measured
此外還研究了摻雜在固體y _ 2sio _ 5中的pr ~ （ 3 + ）的光泵紅外受激輻射和能量轉移上轉換，分別測得了紅外受激輻射的閾值能量和發散角，並擬合得出了能量轉移速率。The millimeter has the largest frequency band and the highest velocity of communication, but it has the highest cost and technical defaults : multi - path effect, reflect and scatter caused by cloud, smoke, water - dropping, the buildings, the grounds and its shape, the interference caus ed by the thunder, the complexity of device, difficult maintenance, and so on. now the band of the leakage coaxial line is up to 3ghz, leakage coaxial line has some advantages : good adaptability to cloud, smoke, water - dropping, the buildings, the grounds and its shapes, good steady field, it has some technical defaults : lower resolution for location and measuring velocity, the more complex of its sending - receiving relay devices, weak anti - interference, the strict demand for the hole size in the line, the cleaner work environment and the higher cost
毫米波具有最大的帶寬和最高的通信速率，但也有最高的成本要求和較難克服的技術問題，即傳播的多徑效應，降水、雲霧、地形、地貌、建築物等的反射散射，打雷時的嚴重干擾，設備復雜，維護困難等等；泄漏同軸電纜的帶寬目前已做到3ghz ，具有對地形地貌建築物的適應性強，場強穩定，但它的定位測速精度低，它的收發中繼設備較復雜，抗干擾能力低，電纜上的開槽有著嚴格的尺寸要求，工作環境要求清潔，成本較高；傳統無線感應技術具有結構簡單，成本低廉，維護方便，定位精度較高的優點，但是，它沒有抗干擾能力。Based on the concept of the rcs and the theory of the basic electromagnetic scattering, this dissertation discussed the application of the physical optics ( po ) to the rcs of bodies modeled with nurbs surfaces, and completed an integrate software with the display, transfer, shelter handling and modification of the models
本文圍繞復雜目標雷達截面（ rcs ） rcs的概念及基本電磁散射理論，討論了基於nurbs曲面模型的物理光學法的應用，同時完成了集模型顯示、修改、變換、消隱及rcs計算於一體的綜合軟體開發。Then the solving procedures of these bies by the rwg functions based moment method are elaborated, and the method of modeling complex objects built of arbitrary line, surface and volume structures is developed. in order to solve realize antenna and circuit problems, methods of adding excitations and concentrated loadings with moment method are deceloped, and matrix pencil ( mp ) method is used to deembeded the s prameters of antennas and circuits from the computed current distribution. some numerical results of practical complex antenna and scattering problems are presented to illustrate the veracity and effectiveness of the method
在第一部分中，首先從電磁場的基本理論出發，基於等效原理和邊界條件以統一的方法建立了用於分析金屬、介質及金屬與介質混合結構的邊界積分方程，並歸納和比較了各類積分的適用范圍和優缺點;在此基礎上，給出了使用基於rwg函數的矩量法求解各種邊界積分方程的一般過程;研究了具有任意線、面、體組成的復雜結構的電磁建模方法，並給出了各種多面連接情況下基函數和未知量的選取方法;研究了使用矩量法分析電路、天線問題時集總元件和激勵源的處理方法，並基於矩陣束方法（ matrixpencilmethod ）提取了電路和天線問題的s參數;最後通過分析一些工程中的復雜金屬天線問題和具有「金屬與介質混合結構」的散射和天線問題驗證了方法的準確性和高效性。But using the high - frequency approximate method to deal with the coupling of parts of electrical - large size target is troublesome as well as not accurate. combining the moment method and the high - frequency approximate method is a development trend and study way in the future
但高頻近似方法對于電尺寸大而形狀很復雜的散射體各部件之間的相對禍合處理起來有些麻煩且不很精確。將高頻近似方法和數值方法（如矩量法）相結合，是以後的發展趨勢和研究方向。This part emphasizes the synthesis of nanoarrays, aiming at controlling the size and distance of nanocrystallites using calixarene derivatives by altering the size, length and chemical structure of the organic molecules ; 2. this part emphasizes in situ synthesis strategy for fabrication of polymer network of zns based nanopowder, aiming at size controls, coating and preventing agglomeration following " one - pot " synthesis ; this method fits to low cost, large scale production ; 3. according to development in zno nanomaterials, we first report on the synthesis, characterization of amorphous zno, aiming at describing the principles and approaches of synthesis techniques, optical properties, spatial structure and doped effect ; the amorphous zno displays cage - like structure, showing a strong ultraviolet emission while the visible emission is nearly fully quenched, a potential uv - emission material ; 4
本論文以量子結構自組裝為出發點，提出利用杯芳烴及其衍生物的化學受限反應實現尺寸可調半導體納米粒子自組裝；提出有機聚合網路原位組裝zns基納米熒光粉方法，把熒光粉的納米化、包敷、防團聚在「一鍋」反應中完成，適于低成本，批量生產；根據當前zno的研究情況，我們首次合成了非晶zno ，研究了它的光學性質，確定了它的結構，並對其摻雜進行了初步的研究，非晶zno表現出強的深紫外發光特性，而可見發射非常弱，是一種有巨大潛在應用價值的深紫外發光材料；利用非晶zno的亞穩特性，對晶化過程中非晶zno納米晶zno三維受限量子結構特性，界面特性進行了深入的研究；利用固相熱分解一般受擴散控制特性，實現了尺寸可控的zno三維量子結構的自組裝；利用非晶zno的高度分散性，容易均勻成膜特性，實現了非晶籽晶誘導低溫液相外延自組裝生長高取向zno晶體薄膜。Ballistic missile system is a very complicated system, which has its features, such as high cost, finite quantity, and separate launching pad, etc
摘要彈道導彈系統是一個非常復雜的系統，有其自身的特點，其造價昂貴，數量有限，發射點也很分散。The investigation is very useful not only in further improving the sparse matrix canonical grid method for quickly analyzing electromagnetic scattering of complicated random scatterers, but also in improving the technology of remote sensing, investigating land mine detection and analyzing densely packed interconnects
本文的研究進一步改進了smcg方法，使smcg方法的計算效率得到了提高，為快速分析各種復雜的隨機分佈目標的電磁散射問題奠定了基礎，為遙感技術的發展、電磁探礦的研究以及電路互聯封裝的分析提供了理論指導。The properties of these doped powders, the microstructure and composition of these rare - earth co - doped tungsten matrices and cathodes have been investigated by size analysis, xrd, sem and edax. the electronic emission performances of these cathodes are measured in uhv electron emission surveyor. aes is adopted to analyze the atom composition and diffusion behavior of active elements on cathode surfaces
通過粒度分析、 xrd 、 sem 、 edax研究了摻雜粉末的特性、燒結基體和陰極的微觀結構和成分;用動態真空電子發射測試儀對上述陰極進行了電子發射水平的測試;採用aes對陰極表面原子組成和活性物質的擴散行為進行了研究，分析了陰極發射水平與表面原子組成的關系。Spurious transmitter noise
發射機雜散躁聲The tested results show that the designed c - band fmcw frequency source meets the waveform requirements, and its output power is more than 20dbm. however, the spur level was too high in the bandwidth
實驗表明所設計的c波段fmcw頻率源達到波形參數要求，發射功率達到20dbm ，但帶內雜散抑制不理想。With these backgrounds, the object being investigated in this article is composite metallic and dielectric structure which is composed by piecewise homogeneous, linear and isotropic medium, the problem being investigated is the complex scattering and radiation problem, the intention being investigated is modeling and fast computing the electromagnetic characteristic of electric large complex structures with uniform method, the final objective is developing general fast electromagnetic computing software to solve the realize electromagnetic computing problems in engineering
本文就是圍繞這一背景展開的，研究對象是由分塊連續、線性、各向同性媒質組成的「金屬與介質混合結構」 ，研究問題是復雜的散射和輻射問題，研究目標是以統一的方法對電大尺寸復雜結構作電磁建模與快速計算，最終目的是開發通用的電磁計算程序，來解決一些工程中的復雜電磁計算問題。分享友人