top-down system 中文意思是什麼
top-down system
解釋
自頂向下方式-
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。 -
As key technology of the single chip calculator, the highly integrated dynamic cmos logic implement and the micro program design are now owned only by the developed countries and kept in secret. based on the conjunction of " top - down " and " bottom - up " design approach, the hardware system and micro program design of the calculator is thoroughly studied in this paper, and finally has been mastered
本論文以香港興華半導體公司的計算器單晶元c9821為藍本，採用了自頂向下和從底向上相結合的方法，對計算器單晶元的硬體電路設計和軟體編程方法進行了深入的研究與剖析，終于掌握了這種晶元的設計技術，並對c9821進行了功能的改進與完善。 -
After analyzing the usb device controller function requirements, the thesis divides the system into several sub - modules by the way of top - down
在對usb設備控制器的功能進行詳細的分析后，採用自頂向下的方法劃分系統模塊。 -
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。 -
The aggregation method reduces the dimension and the complexity of the micro - system, but the aggregation model is not the copy of the micro - system, so it makes new global properties emerge at the macro - level which is called emergence. in this paper, the concept of the functional emergence and the dynamical emergence are defined. the direction of emergence effect is bottom - up, and there also exists top - down effect which is called immergence
北京工業大學工學碩士論文通過模型的聚合縮減了模型的規模，給系統的分析和研究帶來了方便，但聚合模型畢竟不是原模型的拷貝，所以在聚合模型中會表現出同原模型不同的行為特性，微觀系統中微變量的變化會導致聚合模型不同的行為特性；即低層對高層的影響，這種影響稱為行為突現（ eme ， gence ） 。 -
This design for mvbc system adopts top - down eda common design flow. circuit design adopts veriloghdl coding description. function simulation and timing verification adopt simulation tool vcs of synopsys inc, the logic synthesis tool and fpga programming tool adopt the quartus ii of altera inc, and the fpga advice stratix ii ep2s15
該mvbc系統設計採用業界通用的自上而下的eda設計方法，電路邏輯實現採用veriloghdl硬體語言描述，功能和時序驗證的動態模擬採用synopsys公司的vcs ，而邏輯綜合與fpga實現採用altera公司的集成開發環境quartusii軟體以及stratixiiep2s15的fpga器件。 -
It also gave out some reference for the future soc. the fec system can increase the error - correcting ability if we increase the iterative times, which express the excellence of top - down designing and blocking
在本文所提出的糾錯系統的基礎上，通過增加解碼迭代次數，可以根據要求提高糾錯能力，這使糾錯系統的升級成為可能，再次體現了top - down和模塊化設計方法的優越之處。 -
In order to improve the efficiency of progressive die design, this dissertation offers the research on the development of ppdcs ( cad system for precision progressive die ) based on solidworks. it focuses on the characteristics of process design and the realization of interactive design, and also covers feature - based product modeling and top - down structure designing
本論文以提高模具企業的設計效率為目的，綜合研究了基於solidworks的精密級進模cad系統ppdcs的開發，重點分析了系統的工藝設計特點與互動式工藝設計的實現方法，同時對級進模cad系統基於特徵的產品模型與「自頂向下」的結構設計進行了探討。 -
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。 -
The paper begins with the research of the organization ' s current state and available resource, then demonstrates the necessity and feasibility of system development, puts forward the objective and task of the system by the analysis of whole system, fixs on this system ' s main function and structure by the structured method of top - down and delicatilization step by step, and finally uses the object oriented programming to make the concrete design
本文從系統的現行狀態和可用資源的調查入手，論證了系統開發的必要性和可行性，通過對整個系統的分析，提出了系統的目標和任務，運用自頂向下、逐步細化的結構化方法確定了系統的主體功能和結構，最後運用面向對象的程序設計方法（ oop ）進行了具體的設計。 -
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。 -
Study on construction and joint treatment for temporary vertical supporting system in top - down construction method
逆作法豎向臨時支承體系的施工及節點處理的研究 -
This paper first discusses the feature of vhdl, and introduces the process of very long digital system by vhdl and auto - synthesis system with the method of top - down through designing control system of color lamp, reveals that it is very important to design digital system, logic synthesis and emulation with vhdl
本文介紹了硬體描述語言的功能特點，並通過彩燈控制系統的設計過程（給出了模擬結果） ，介紹應用硬體描述語言及自動綜合系統以自頂向下的方法進行大規模數字系統設計的過程，揭示了硬體描述語言設計數字系統、邏輯綜合和模擬等技術在數字系統設計中的重要地位和作用。 -
Abstract : according to the system of regionalization of natural disaster presented by authors, this paper produces the basic units of natural disaster from the physical geographical elements. combined with the natural disaster database and the method of bottom - up merging, 110 natural disaster areas is achieved. furthermore, by using the top - down dividing method, the comprehensive regionalization scheme of agricultural natural disaster is achieved, with 5 natural disaster realms, 23 natural disaster regions and 110 natural disaster areas
文摘:根據作者提出的全國農業自然災害綜合區劃的思路，以自然地理要素形成基本單元，結合自然災害報刊數據庫系統，運用自下而上區域合併的方法，得到了全國自然災害區劃小區;運用自上而下區域劃分的方法，將全國農業自然災害劃分為5個大區、 23個區和110個小區，得到了全國農業自然災害綜合區劃方案 -
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 。 -
5 the conception that top - down system level design and bottom - up building library are parallel operations is proposed for the first time, and the conception of parallel design flow is brought forward according to this
85 、提出了自上而下的系統設計與自下而上的建庫是并行操作的概念，並據此提出并行設計流程的概念。 。 -
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。 -
On the base of it, a piece of data collection special chip with a core of fft is designed with vhdl ( vhsic hardware description language ) in the way of top down system design method, which can finish harmonic analysis and measure the voltage, current, frequency and power of the electric power system
在此基礎上，使用標準的硬體描述語言vhdl設計出一個fft變換內核，並以該內核為核心、採取自上而下的系統設計方法完成了一個電力系統數據採集專用晶元的設計，實現對電力系統的電壓、電流、頻率、有功和無功功率等參數的測量以及各次諧波分析。 -
Based on detail analysis and modeling of the capp domain, the paper established the framework of component - based capp system in order to gain a more big granularity of component and reach a high level of component reuse. the article combines the bottom - up and top - down architecture design method and design the component - based capp framework. we discussed in details about the definition of capp domain object and the basic domain message
在capp領域詳細分析和領域模型的基礎上，為了獲得更大粒度和更高層次的復用，本文建立了基於構件的capp系統框架結構，並結合自下而上和自上而下的框架設計方法對capp領域框架進行設計，詳細定義capp領域基礎對象、領域框架消息。
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