top down design 中文意思是什麼
top down design
解釋
自頂向下設計-
According to the research, the major work done is as following : < 1 > analyzes the symmetric - key encryption algorithm des and dissymmetric - key encryption algorithm rsa, and makes them easy to realize in hardware. < 2 > according to the algorithms and the thought of reconfigurable computing, the dissertation accomplishes the design of 64 - bit des system architecture and the design of 256 - bit ~ 1024 - bit rsa system architecture. < 3 > using the top - down high level design methodology and the hdl language, accomplishes the description of the des / rsa designs, the simulation and the synthesis
本論文主要的研究工作： < 1 >對現有的對稱加密演算法des演算法和非對稱加密演算法rsa演算法進行分析，使其易用硬體實現； < 2 >基於可重構思想和特點，完成64位des演算法和256位1024位模長rsa演算法的可重構硬體的設計； < 3 >採用自頂向下的設計方法，利用hdl語言對des / rsa設計進行功能描述，並完成軟體模擬，綜合和布線； < 4 >在可重構計算驗證平臺上進行演算法驗證，並對設計的可重構和設計的進一步優化進行討論。 -
The key to the fft algorithm is the design of butterfly computation and that of the address logic. the whole schema is designed in the top - down design flow and described in the vhsic hardware description language ( vhdl ), basing on these, we do our research on reconfigurable technology. the result indicates that the data processing ability of reconfigurable system improved greatly
結果表明，可重構系統在數據處理能力方面比以往的系統有了很大的提高，本設計實現的fft重構處理器可工作於60mhz下，完成一個16點fft需要132個主時鐘周期，完成32點fft需要324個主時鐘周期，而且具有一定可重構性，可以方便地將其運算點數進行擴展，或將其他的圖像處理演算法在實時處理系統中實現。 -
In this paper, using a top - down design scheme, the risc mcu ip core is divided into two parts : data path and control path. all the modules in the two parts are described by verilog hdl, a kind of hardware description language. the simulation and synthesis of the whole work are finished successfully with eda tools
本文對pic16c6x單片機系統結構、指令系統和系統時序進行了分析，並且在此基礎上對精簡指令集mcuip核進行頂層功能和結構的定義與劃分，建立了一個可行有效的riscmcuip核模型本文將mcuip核劃分為數據通道與控制通道兩部分，採用asic設計中的高層次設計方法，使用硬體描述語言veriloghdl對這兩部分的各功能模塊進行了設計描述；利用多種eda工具對整個系統進行了模擬驗證與綜合。 -
This paper mainly analyses the demands on distribution power automation terminal, studies its structure, develops it with a top - down design
本文主要分析了配電自動化終端的需求，研究其結構，並採用了自頂向下的思想設計和研製了配電自動化終端單元。 -
Based on top - down design method, the thesis discusses ip ' s soc design and integration technique
本文採用自上而下的設計方法，討論了基於ip核的soc設計與集成技術。 -
Digital design platform using the " top - down " design methods, this product is the highest form of the component unit began as a component of the overall system to be considered according to their products in the mutual position, played the role and function of the realization of the establishment of such products constitute the graphic layout, through to design constraints, the key design parameters, such as design information capture products to concentrate on aircraft design intent, top to bottom to transmit design information products launched throughout the design process
數字化機構設計平臺採用「自頂向下」的設計方法，這種方法是從產品構成的最頂層開始把組成整機的部件作為一個整體系統來考慮，並根據其在產品中的相互位置關系、所起的作用和實現的功能等建立產品構成的布局圖形，通過給定設計約束條件、關鍵的設計參數等設計信息，集中地捕捉產品整機設計意圖，自上而下地傳遞所給設計信息，展開產品的整個設計過程。 -
It presents the verification strategy used in the whole eda design flow of the chip. the simulation on module level ( inc. post - layout ) uses the software event - driven simulator, the simulation of the associated modules or whole system uses cycle - based simulator and hardware emulator, for the gate - level netlist produced by using top - down design flow, the sta tool can analyze the static timing, and more formal verification is used to ensure the correct function
本章還提出了系統在整個eda設計流程中的設計驗證策略方法：模塊級的模擬（包括布線后的模擬）全部採用事件驅動式的軟體模擬工具來驗證，各大模塊的聯合模擬及整個晶元的功能驗證（寄存器傳輸級與門級）使用基於周期的模擬工具和硬體模擬器；對于採用top - down的設計方法得到的門級網表使用專門的靜態時序分析工具來進行時序分析以及採用形式驗證來保證正確的功能。 -
So the equipment is schemed out to simulate the work - state of aepds, according to the in - out signals of every solid - state power controller ( sspc ) and the stochastic voltage and current of buses. the top - down design method is adopted in the design
所以作者根據固態功率控制器輸入、輸出信號模擬多路負載，以及匯流條的電壓、電流等在飛機配電系統中的各種工作狀況，研製了「先進飛機配電終端自動測試裝置」 。 -
The project of developing the core comes from a national key program in science and technologies, study on mcu high level language description and embeded system technology. the project is followed the top - down design way
這個項目遵循了自上而下的設計流程，從系統劃分、編寫代碼、 rtl模擬、綜合、門級模擬，到布局布線、電氣規則檢查、設計規則檢查，網表比較等。 -
In the light of the method of top - down, the author put forward the concept of product function structure tree, which was used to express the product ' s function structure during the conceptual design. based on it, the product structure was expressedthe paper studies the definition of the function model which supports the method of top - down design, and the expression of function model based on binary - tree was also put forward in the thesis. for the abstract description of parts in the assembly level and the integration with other systems during the whole life circle of the products, the concept of assembly model was presented, the definiton, classfication and expresstion method of assembly feature was studied in this thesis. the representation of assembly relationship and data structure of the assembly model based on diagram was further studied. for the constraints transfer between function model and assembly model, an hierarchical component model is presented. an arithmetic of the change of assembly relationship when assembly model changing was also studied. fmally, a system named fb - tpms, which using object oriented programming technology and pro / toolkit, was developed
為了支持在裝配層次上的零件的抽象建模，提出了骨架模型的概念，並討論了裝配模型的建立方法。根據前述裝配模型有關研究，探討了從功能模型到裝配模型以及從上一級裝配模型到下一級裝配模型的數據和約束傳遞問題，並用層次化單元裝配模型得以解決，同時提出了裝配模型變動時引起的裝配關系的變化的有關演算法。在論文的最後部分用用面向對象的程序設計方法，結合課題要求，研究了支持自頂向下設計方法的裝配建模系統fb - tpms 。 -
First, the top - down design process is introduced, then, the key techndogies including the expression of assembly model, assembly modeling, the optimization and analysis method of assembly model, and assembly sequence planning are presented, finally, the development directions of those key technologies are given
首先介紹了自頂向下的設計過程；然後介紹關鍵技術及研究現狀，包括產品裝配模型的表達方式，裝配模型的建模方法、裝配模型的優化分析方法和裝配順序規劃等；最後給出各關鍵技術的發展方向。 -
Top - down design and stepwise refinement urged the programmer to set forth the broad outlines of a procedure first and only later fill in the details
頂?底的設計和逐步改進的方法驅使程序員先構造一個程序的輪廓，然後再補充細節。 -
Using the idea of top - down design, the writer built up 3 ways to complete the variant design : dim - questioned, feature - controlled and database - visited of standard parts. by means of fea module, the writer can produce the fea model of the original program and get results of the analysis as well
作者採用自頂向下的設計方法來完成變型設計，並根據不同零件的變型要求定製了三種變型設計方法：尺寸詢問法、特徵控製法和標準件庫訪問法。 -
Firstly, a top - down design methodology based on systemc is presented. the methodology is based on four system abstract models : function model, transcation model, communication model and implementation model. a csma / cd mac protocol concrete example is presented to verify it, and its advantages and disadvantages are also evaluated. finally, the method for translating a systemc source into an equivalent vhdl program is discussed. with the aided tools lex and yacc, a prototype of systemc - vhdl translation system is implemented
本文的研究內容首先是提出了一種基於systemc的自頂向下的設計流程。這一設計流程基於系統的四層抽象模型：功能模型，事務模型，通信模型和實現模型。並以一個csma / cdmac層協議的實現實例驗證了這一設計流程，評估了systemc在soc設計中的優缺點。 -
By using veriolg hdl and a top - down design model, a tap control logic was designed, which could reduce some dsp ’ s work
利用veriloghdl語言，採用自頂向下的方法實現了測試存取通道（ tap ）的控制邏輯，降低了dsp的設計難度。 -
The design of mcs - 51 microcontroller is followed the top - down design way, including system partition coding ( vhdl ) rtl simulation synthesis, gate level simulation ect
對mcs ? 51單片機進行正向設計，包括系統劃分、編寫代碼、 rtl級模擬與綜合、門級模擬等。 -
Two top - down design methods based on pro e
的兩種自頂向下的設計方法 -
On the basis of these discussions, some methods of assembly modeling and the " bottom - up " and " top - down " design methods and process are researched
接著在此基礎上又對裝配建模的一些基本策略和裝配建模的兩種設計過程? ? bottom ? up和top ? down進行了探討。 -
In chapter 5, the means of structure design and part design are researched on. then the realization of structure design using top - down design is presented. with information of separated loops, the efficient part design has been achieved
第五章研究了系統結構設計與零件設計的實現方式，重點分析自頂向下設計方法在級進模結構設計中的應用；並根據工藝分析系統的特徵環幾何信息來設計凸凹模零件，實現工作區零件的快速設計。 -
I will use the acme booksellers sample to explain how to use the top - down design and implementation that is consistent with jax - rpc programming model
我將用acme booksellers樣本解釋如何使用與jax - rpc編程模型一致的自頂向下的設計和實現。
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