ptd 中文意思是什麼
ptd
解釋
調諧后頻率漂移-
In order to obtain the complex rcs of the target quickly in high frequency band, the graphical electromagnetic computing software, greco, is used. the modification of the computing kernel code is presented. the judgement of edges of complex targets is more sufficient and the computation of edge wave based on physical theory of diffraction ( ptd ) is more exact after the modification
為了可以準確地預估雷達目標的rcs ，我們對于航天部207所的圖形電磁計算軟體（ greco ）進行了進一步的開發與包裝，用borland公司的c + + builder開發了更加易於使用的基於windows操作系統的新版greco ，並且在考察了原有的greco計算內核之後，結合計算機圖形學方面的理論，對greco的內核代碼進行了改進，整體上使得邊緣繞射場的計算結果更加準確。 -
The transmembrane activity of the ptd of tat protein fused at the carboxyl - terminus of gfp in vivo
端融合在活體體內的跨膜遞送作用 -
Depending on modern logistics concept with novel connotation, modern logistics professional software with perfect function, and modern logistics experts with high quality, shenzhen changyi logistics stock limited aims to offer top - notch modern logistics planning and integrated service for customers, which has being cooperated closely with singapore omnibz ptd ltd, many domestic logistics technology companies as well as the logistics academy of many key colleges and universities
深圳市長宜物流股份有限公司與新加坡安利科技有限公司omnibz pte ltd以及國內若干物流技術公司和重點高等院校物流研究所建立了緊密合作，以內涵新穎的現代物流系統專業理念功能強大的現代物流系統專業軟體素養優良的現代物流專業人才，為客戶提供一流的現代物漢系統規劃與集成服務： -
This technique combines the edge - based finite - element method with physical optics ( po ) and physical theory of diffraction ( ptd ). the hybrid technique is applied to compute the scattering fields from the electrically large bodies with cracks and cavities on their surfaces. it is also used to analyze the scattering characteristics of microstrip antennas residing in a cavity mounted on metal objects with finite sizes
本文採用edge - basedfem為基本方法，結合物理光學法（ po ） 、物理繞射理論（ ptd ） 、邊界積分方程（ bi ） 、區域分解技術（ ddm ）和完全匹配層（ pml ）吸收邊界條件等求解方法構成的混合方法，對電磁散射和輻射問題進行了研究，主要包括以下內容：提出了一種edge - basedfem與物理光學方法和物理繞射理論相結合的混合方法? fem po - ptd方法，並將該混合方法應用於帶有腔體或槽縫的電大尺寸導體目標的電磁散射特性分析和位於有限導體目標上的背腔式微帶貼片天線的電磁散射特性分析。 -
Interview with siemens ptd china general manager andreas matth
訪西門子中國有限公司副總裁兼西門子輸配電集團中國總經理馬德先生 -
And then a hybrid technique combining ddm with eb - fem, po, and ptd is given for the analysis of electromagnetic scattering by electrically large bodies with deep cavities
在此基礎上，將ddm與eb一fem 、物理光學法、物理繞射理論相結合，分析了帶有深腔的電大尺寸三維導體目標的電磁散射特性。 -
Ptd pan turnout piece delay
聲像分支延時 -
Fxs terminal device based on ptd
終端的研究 -
As one of the fastest growing business units among siemens ptd ' s operations in china, smvs is playing an active role in facilitating the sustainable development of china ' s electric power industry
作為西門子輸配電在中國發展最快的業務部門之一，西門子中壓開關技術（無錫）有限公司為推動中國電力行業的可持續發展扮演了重要的角色。 -
This paper mainly discusses the realization of the large complex targets electromagnetic scattering computation. high frequency scattering predication can accelerate electromagnetic simulation computation. this paper discusses electromagnetic scattering predication using physical optical ( po ), geometrical optical ( go ) and physical theory of diffraction ( ptd )
大電尺寸復雜目標的電磁計算存在數據存儲量及計算量巨大的情況，使用高頻估算方法可以明顯提高電磁散射的模擬計算速度，本文主要研究物理光學高頻電磁散射估算方法的實現。 -
Aiming at efficient analyses of electromagnetic characteristics of electrically large complex cavities, some hybrid techniques are developed based on eb - fem, including ipo / fem, extended ipo, improved ipo / fem, ddm / fem - bie, ddm / fem - po - ptd, fem / ibc, and fem / pml. the following contributions have been made in this dissertation : a novel hybrid approach is proposed in which iterative physical optics ( ipo ) subdomain - splicing technique is combined with eb - fem, the mathematical model of the proposed ipo / fem is established by some approximate methods
本文以eb - fem為基礎，以電大尺寸復雜腔體的電磁特性為分析對象，對eb - fem與迭代物理光學法（ ipo ） 、區域分解法（ ddm ） 、阻抗邊界條件（ ibc ） 、完全匹配層（ pml ）和mur吸收邊界條件的結合演算法以及具有非完純導體邊界的ipo理論模型進行了研究。
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