未定型統合 的英文怎麼說

中文拼音 [wèidìngxíngtǒnggě]
未定型統合 英文
identity moratorium
  • 未 : Ⅰ副詞1 （沒） did not; have not 2 （不） not Ⅱ名詞1 （地支的第八位） the eighth of the twelve ear...
  • 定 : Ⅰ形容詞1 （平靜; 穩定） calm; stable 2 （已經確定的; 不改變的） fixed; settled; established Ⅱ動詞...
  • 統 : Ⅰ名詞1 （事物間連續的關系） interconnected system 2 （衣服等的筒狀部分） any tube shaped part of ...
  • 合 : 合量詞（容量單位） ge, a unit of dry measure for grain （=1 decilitre）
  1. The research of this paper includes three parts : the first, according to the statistical figures about the cargo transport in recent years, it analyzes cargo transport structure and the changing law and the internal reason of cargo transport. at the same time it analyzes and calculates the change of the arriving ships " structure for a systematic and full understand of the transport demands. the second, it make a scientific forecast of the port ' s future cargo capacity making use of the grey forecast system, which provides scientific basis for medium - long term development plan of the port ' s cargo handling capacity

    本文研究的工作主要分三個部分：第一，根據張家港近年來有關貨物運輸的一些統計數據，對貨物運輸的結構和規模演變的規律及內在原因作一剖析，同時對到港船舶的結構變化進行預測，以求對運輸需求有一個系統全面的了解；第二，應用灰色預測系統對張家港港未來港口貨運吞吐量進行科學預測，為張家港港貨物裝卸能力規劃提供科學依據；應用物元分析技術對張家港港口的未來發展前景作出一定程度的分析、研究，找出張家港港口未來發展規劃的零散無序、不成系統的因素，總結前人經驗的基礎上採用綜合評判物元模型進行評判，在預測港口未來發展規劃是否科學實際上具有獨到見解。
  2. As an advanced materials preparation technology, spray - deposition has shown remarkable superiority in producing large - sized alloys and metal matrix composites. however, the spray deposeted preforms usually contain a certain quantity of porosity. besides, the oxide films on the surface of the particles lead to week metallurgic conjunction between the particles. in order to obtain an ideal structure and performance, the porous preforms need further densifying and plastical forming. in this paper, a new technology named wedge pressing was used to densify spray - deposeted 5a06 aluminium alloy, in which the large deformation can be obtained through the sum - up of local deformation and multi - step small deformation. this method can also solved the problems in traditional processing and greatly decreased the producing cost. what ’ s more, the reserch on the wedge pressing desification rules about the large - sized spray deposeted preforms was significant it was vital not only to the further densification of the prefoums but also to the further research on plastical deforming the research was also benefit to the industrialization an the application of the spray deposeted porous materials

    坩堝移動式噴射沉積技術作為一種先進的材料制備新技術，在制備大尺寸合金及金屬基復合材料方面具有顯著的優越性。然而噴射沉積坯件特別是大型坯件通常存在一定量的孔隙，顆粒表面存在一定量的氧化膜，顆粒之間未能完全達到良好的冶金結合狀態，因此需要進行后續緻密化和塑性變形才能獲得理想的組織和性能。本文採用一種新型的楔形壓制工藝，即通過局部變形、多道次小變形累積實現大變形的緻密化加工方法，對噴射沉積多孔坯料進行后續緻密化和塑性變形，很好地解決了傳統加工工藝的難題，大大降低了生產成本。
  3. Abstract : events contributing to the establishment of statistics the science of data and its chemical branch are epitomized. as the new chemical branch named chemometrics or chemstatistics has been disputed in the circles of chemistry for a long time, reasons for adopting chemstatistics are given, which is defined as the science of gathering or generating, describing, summarizing and interpreting the data concerned to acquire new chemical knowledge or information. the fact that many traditional statistical methods, such as significance tests, analysis of variance, regression and correlation, and some others not usually considered statistical, such as model building, monte carlo method, fourier transformation, artificial nerval networks and pattern recognition, each contains one or more of the five connotations of statistics is expounded. the regular pattern that a chemstatistician grows up is approached. the urgent task is to include chemstatistics in the undergraduate or graduate curriculum of chemistry specialty. the goal of the project is to nurture chemists who know statistics

    文摘:本文追溯了統計學發展、建立中的大事，陳述了它的定義及其化學分支發展、建立的梗概；鑒于化學界對該新興化學分支學科的名稱長期存在爭議，提出了以化學統計學而不以化學計量學為該學科名稱的理由，把化學統計學定義為一個研究有關數據的收集或產生、描述、分析、綜合和解釋，以獲得新化學知識或信息的學科；闡明了許多公認屬于統計學的方法，如顯著性檢驗、方差分析、回歸和相關，以及一些尚未認定屬于統計學的方法，如模型建立、蒙特卡羅方法、傅立葉變換和人工神經網路，都含有統計學5個內涵中的一個或多個；探討了化學統計學家成長的模式，認為當務之急是把化學統計學納入化學專業的教學計劃，以培養懂統計學的化學家。
  4. The paper introduces the theory of health of urban ecosystem into the study of ecourban in connection of national ecourban building which is now in the ascendant, builds a health evaluation model of urban compound ecosystem according to related studies, using as the standard for judging the level of ecourban building ; decides the multi - index weight of the model by using the method of entropy right, avoiding a subjective judgment which might be caused by the method of subjective evaluation and ; applies the model into living examples of ecourban planning of nanyang city, describes the development level of each sub - system of nanyang city and other cities of henan province, the coordination level among each sub - system and the overall health statement of compound ecosystem in a quantitative way, providing scientific decision - making basis for ecourban building of nanyang city

    摘要針對當前全國方興未艾的生態城市建設，將城市生態系統健康理念引入生態城市研究當中，根據相關研究構建了城市復合生態系統健康評價模型，作為評判生態城市建設程度的標準；利用熵權法確定模型中的多指標權重，避免了採用主觀賦值法可能帶來的臆斷性；將評價模型應用於南陽市生態城市規劃實例中，以定量的方式描述了南陽市以及河南省其他城市各子系統的發展水平、子系統間的協調程度以及復合生態系統的整體健康狀況，為南陽市生態城市建設提供了科學的決策依據。
  5. Many organic and inorganic contaminants of the shallow groundwater in city zone and close suburb of beijing were investigated on the spot, more than 100 samples were got. by spatial analysis, modeling calculation and spatial interpolation, maps of each contaminant distributions are made and divided into two parts, the beyond the standard and below the standard. with those maps, the total environmental quality of the groundwater is evaluated

    利用本系統提供的空間分析、模型運算等分析工具，對2000 2001年北京城近郊區淺層地下水環境污染進行了如下評價分析工作： （ 1 ）對地下水調查中檢測出的各種有機污染物和無機污染物進行了空間插值分析，劃定了超標區的分佈范圍； （ 2 ）對2000年枯水期的淺層地下水綜合環境質量進行了分析和評價； （ 3 ）對1996 、 1999和2000年的綜合水質評價圖進行了對比分析，發現北京城近郊區淺層地下水環境綜合質量逐年下降；預知未來幾年內，淺層地下水環境質量不會有明顯好轉。
  6. It is selected guangnei - street district region for study in xuanwu district, beijing. the regional land - use capacity of the selected objective is developed and it explores impact of mixed land use for the future transport system, the establishment of the regional road network simulation models is to certificate the research results, supporting the need sand feasibility for the study of r - tia

    選定北京市宣武區廣內大街片區為示範區域進行研究，計算出區域目標年可開發量，並探討了混合土地利用對未來交通系統的影響，建立示範區域路網模擬模型，驗證了研究成果，有力地佐證了進行區域交通影響評價研究的必要性和可行性。
  7. Based on the analysis of international and domestic steel market, outside environment and inside condition on developing of bulk transportation, it describes the import iron ore transportation system of wu steel systematically along the current main nodes from sources to the plant and relative quay, transfer port, storage system and logistic management system, designs a effectual and economic transporting mode in order to build up the developing direction of changjiang shipping company at the same time the author hopes that by means of theoretical analysis, research and integration on the traditional transportation mode in addition with the changing of outside environment, the conception of system logistic management and the angle of marketing strategy of shanghai company, the supposed transportation mode designed for wu steel in this paper and the relative facilities will reduce the cost of wu steel for import iron ore

    本文以我國國有大型企業?武漢鋼鐵集團公司（以下簡稱『武鋼』 ）的原料運輸供應鏈? ?進口鐵礦石運輸的方式的研究為題，並結合長航集團上海長江輪船公司（以下簡稱『上海公司』 ）的散貨運輸的未來發展戰略目標和總體發展戰略，通過對國際、國內鋼鐵市場及散貨運輸發展的外部環境和內部條件因素的分析，以理論方法為忖托，依據實際狀況，沿著武鋼進口鐵礦石運輸進廠的節點、碼頭與倉儲系統以及物流管理系統對武鋼的進口鐵礦石運輸系統作一個綜合的分析，擬定一種有效的運輸模式，旨在為長航未來發展確定方向。
  8. Aim at the dtc ' s blemish mentioned above and the direction of dtc technique development, the dissertation put great emphasis on the work as follows, with an eye to exalt dtc system function : ( 1 ) a new speed - flux observer of an induction motor is proposed to enhance the accuracy of flux observing, which is an adaptive closed - loop flux observer and different from the traditions. a new adaptive speed - observation - way is deduced out according to the popov ' s stability theories ; ( 2 ) to improve the performance of dtc at low speed operation, we have to exalt the accuracy of the stator flux estimation and a new way of bp neural network based on extended pidbp algorithm is given to estimate and tune the stator resistance of an induction motor to increase the accuracy of the stator flux estimation ; ( 3 ) digital signal processor is adopted to realize digital control. an device of direct torque control system is designed for experiment using tms320lf2407 chip produced by ti company ; ( 4 ) bring up a distributed direct torque control system based on sercos bus, sercos stand for serial real time communication system agreement which is most in keeping with synchronous with moderate motor control ; ( 5 ) the basic design frame of the hardware and software of the whole control system is given here and some concrete problem in the experiments is described here in detail

    針對上面提到的直接轉矩控制的缺陷和未來直接轉矩控制技術發展方向，本論文重點做了以下幾個方面的工作，目的在於提高dtc系統的綜合性能： （ 1 ）提出一種新型的速度磁鏈觀測器，新型的速度磁鏈觀測器採用自適應閉環磁鏈觀測器代替傳統的積分器從而提高磁鏈觀測的精度，並且根據popov超穩定性理論推導出轉速的新型自適應收斂律； （ 2 ）改善系統的低速運行性能，主要從提高低速時對定子磁鏈的估計精度入手，提出了一種提高定子磁鏈觀測精度的新思路? ?利用基於bp網路增廣pidbp學習演算法來實時在線地修正定子電阻參數； （ 3 ）採用數字信號處理器dsp實現系統全數字化硬體控制，結合ti公司生產的tms320lf2407晶元，設計了直接轉矩控制系統的實驗裝置； （ 4 ）提出了基於sercos總線網路化分散式的直接轉矩控制系統， sercos （ serialrealtimecommunicationsystem ）是目前最適合同步和協調控制的串列實時通信協議； （ 5 ）基本勾勒出整個控制系統的硬體和軟體設計基本框架，詳細描述一些實驗中的具體的細節問題。
  9. Synthesizing the two identification methods of weighted least square and resricted memory, the mutivariable system recursive estimate algorithems of unknown parameter of autoregressive models in the presence of controlled inputare are given

    摘要將加權最小二乘法和限定記憶兩種參數估計方法相綜合，給出了多變量系統帶控制輸入的自回歸模型未知參數的遞推估計演算法。
  10. On the basis of collecting and processing many datum and materials. firstly. this paper analyzes main activities and cost constitutions of each stage of the life cycle of a fcs, and lay a foundation for later analysis and evaluation of system lcc. secondly, a basis method and usage range for estimating the system lcc are introduced. a multivariate linear regression model of pcs development cost and cost driven factor is built by use of the parametric method and supplies the base of cost estimation of newly - developed systems. thirdly, combine actual examples and make statistical analysis of lcc of a certain pcs developed by our institute, predict unhappened usage and service cost with grey prediction method, obtain proportion of each constitute to the lcc. forthly, according to actual conditions, use the fuzzy theory to overall evaluate efficacy of the fcs, fifthly, combimng our actual conditions, investigate specific measures of how to implement the life cycle cost management in our institute and put forward a new conception of developing web - based flight control system lcc management information system with pdm as the platform. at last, investigate important factors such as reliability and maintainability that may affect the life cycle cost of the fcs in detail, and put forward specific methods of lowering the life cycle cost of the fcs

    論文在收集和整理大量資料的基礎上，首先深入分析了飛控系統壽命周期各階段的主要活動以及各階段的費用構成，為以後系統壽命周期費用的分析和評價奠定了基礎；其次，介紹了壽命周期費用估算的基本方法和使用范圍，並利用參數法建立了飛控系統研製費用與費用驅動因子的多元線性回歸模型，為新研系統的費用估算提供了依據；第三，結合實例對我所研製的某型飛控系統的壽命周期費用進行統計分析，運用灰色預測方法對未發生的使用及維修費用進行預測，得出了該系統的壽命周期費用以及各組成部分所佔比例；第四，根據實際情況，首次運用模糊理論對飛控系統的系統效能進行了綜合評價，構造了飛控系統系統效能模糊綜合評價模型；第五，結合我所實際，探討了如何在本單位實施加強壽命周期費用管理的具體措施，提出以pdm為平臺，開發基於web的飛控系統lcc管理信息系統的新構思；最後，對影響飛控系統壽命周期費用的重要因素如可靠性和維修性等進行了詳細地研究，提出了降低飛控系統壽命周期費用的具體方法。
  11. 3, according to problems that exist and results of system coordinated analysis, and putting forward six series of strategy development schemes. the scheme 2 is the best adjustment scheme of agricultural production structure to yingjing county through model simulation and multi - objective comprehensive decision, and put forward the development routing that establish ecological agriculture giving priority to the ecological stock breeding and developing crop planting and forestry together

    3 、結合存在的問題和系統協調分析結果，對未來提出了六種戰略發展方案，經模型模擬和多目標綜合評判后選定方案二（穩糧擴經增飼型）為農業生產結構調整的最佳方案，該方案發展路線為以生態畜牧業為主，種植業和林業並進發展的生態農業。
  12. As a result the relatively reasonable basic data is designed and mathematics model on the firing effectiveness is established. then the c language program is used to solve the model and reasonable data index and relative theory on the basis of the large number of the simulation computation of the set target are obtained. the paper creatively puts forward the theory of the ship - borne artillery terminal guided projectile system and establishes the mathematics model to evaluate its firing efficiency, and creatively discusses the use of the terminal guidance system in the sea - crossing and island - landing battle, providing a theory basis for the future military struggle against taiwan

    本文的研究針對末制導炮彈這種新型的精確制導武器系統的特點，以炮兵射擊理論為基礎，以現代戰場上重要的點目標和集群裝甲目標為研究對象，設定了比較合理的基礎數據；建立了射擊效能的數學模型；採用統計試驗法，運用c語言設計計算程序對模型進行求解；對設定的重要目標，進行了大量的模擬計算分析，得出了比較合理的數值指標和相關結論；對其作戰應用進行了探討性研究，創造性地提出了船載炮發射末制導炮彈武器系統的新技術，建立了評定其射擊效率的數學模型；創造性地探討了末制導炮彈武器系統在渡海登島作戰中的應用，為未來戰場上我精確制導武器的使用，做好對臺軍事斗爭準備提供了理論依據。
  13. In further research, the following issues must be considered : 1 ) the standardize of corpus ; 2 ) improve the accuracy of chinese words divided syncopation system, handle the different meanings of one word and recognize the words that do not appear in the dictionary ; 3 ) process semantic analysis ; 4 ) dynamically update the training sets fed back by the user ; 5 ) quantitatively analyze the system performance influenced by different factors, use an appropriate model to compare and evaluate the web text classification system ; 6 ) natural language process ; 7 ) distinguish the disguise of sensitive words

    在以後的工作中考慮如下問題: 1 ）數據集的標準化; 2 ）分詞系統精度的提高，對歧義處理以及未登錄詞識別的能力的提高: 3 ）進行合理的語義分析: 4 ）利用用戶反饋信息動態更新訓練集; 5 ）定t分析分類器不同要素對分類系統性能的影響，使用合適的模型來比較和評價分類系統; 6 ）自然語言理解問題，如「引用」問題; 7 ）對于敏感詞匯偽裝的識別問題。
  14. This paper, guided by the marxism economic theory and combined the relevant knowledge of western economics and modern financial development, by adopting the complicated methods of theoretic and practical analysis, systematic and comparative analysis, quantitative and qualitative analysis, by focusing on the topic " financial development ", on the basis of combined judgement on the extent of the deepening of china " s finance, summarizes the contribution to the china " s economic development made by its financial development and the problems existed, and, according to the characteristics of the expansion in quantity on the china " s financial development in the past, puts up forward some constructive proposals on how to intensify our financial reform and push forward the financial development in the future

    本文以馬克思主義經濟理論為指導，綜合運用西方經濟理論、現代金融發展理論的相關知識，採取理論分析與實證分析、系統分析與比較分析、定性分析與定量分析相結合的方法，緊緊圍繞「金融發展」這一主題，在對中國金融深化程度進行綜合判斷的基礎上，總結了改革開放以來中國金融發展對經濟發展作出的貢獻和存在的問題，並針對中國既往金融發展的數量擴張型特點，提出了未來我國深化金融改革，推動金融發展的相應政策與建議。
  15. Then, this paper empirically tested the validation and predictive accuracy of different var risk management model in the domestic financial market. finally, with the analysis of modem financial risk management development trend and the current domestic financial risk management situation, this paper made a prospect for the application of this model in the construction of domestic financial risk management system. through the analysis, the main conclusions are as follows : ( l ) the traditional mean - variance model is the special example of the portfolio selection based on the var risk management model for the case that the returns of the portfolio are assumed to be normally distributed ; compared with the mean - variance model, the var risk management model is more comprehensive and accurate in the measurement of the portfolio risk, so based on the var model, the investors can allocate the asset more effectively. ( 2 ) the var risk management model can provide the timely and comprehensive risk information for the top risk manager, so it is very helpful to the improvement of total risk management efficiency. ( 3 ) based on the var model, the raroc performance valuation approach can reflect the real performance of the portfolio manager and provide the coherent standard for the allocation of risk limitation and the construction of the incentive compatibility constraint mechanism in the financial instiutions

    通過研究分析，本文主要得出如下結論： （ 1 ）傳統的markowitz均值? ?方差模型僅僅是在資產組合收益率正態分佈假設條件下基於var風險管理模型進行資產組合選擇的特例，與均值? ?方差模型中的方差風險度量方法相比， var風險管理模型能夠更全面、更貼切地衡量資產組合的風險，且基於此模型能夠更有效地進行資產配置決策； （ 2 ） var風險管理模型能夠滿足更高層次風險管理者對風險信息的需求，有助於整體風險管理效率的提高； （ 3 ）基於var風險管理模型的raroc績效評價能夠反映資產組合管理人的真實業績，從而為金融機構風險限額的分配和激勵約束機制的制定提供統一的標準； （ 4 ）國內證券市場資產組合收益率服從正態分佈的假設明顯不成立，實證檢驗表明基於資產組合收益率正態分佈假設條件下的方差? ?協方差模型對國內資產組合風險的預測存在較大的偏差，由於文中證明在收益率正態分佈假設條件下基於方差? ?協方差模型進行資產組合選擇的結果等價于markowitz的均值? ?方差模型，因此，均值? ?方差模型對國內資產組合風險的預測同樣會存在著較大的偏差，而半參數var風險管理模型則能夠取得較好的預測衡量效果； （ 5 ） var風險管理模型符合未來金融風險管理的發展趨勢，基於var風險管理模型建立內容提要風險限額內控體系、風險信息披露體系和業績評價體系，並進行金融監管，將有助於國內金融機構內部風險管理方法和外部監管技術跟上國際金融風險管理的發展潮流。
  16. In order to achieve this goal, this research will has the following four specific objectives : understanding the level of fish consumption in china and possible factors that affect the fish consumption ; developing a systematical modeling frameworks and complete demand system for food and fish demand study ; exploring the consumption behavior of both urban and rural consumers in china by estimating model of fish demand system and model of food demand system respectively, analyzing influence of various factors on the demand for fish and other foods quantitatively ; discussing the future change of aggregate amount and the structure of fish demand based on the result of the research, so as to provide basis for decision making in fishery production structure changes and rational utilization of fishery resources

    本項研究的總目標是探討影響水產品消費的各種因素，為預測未來水產品需求和生產結構調整提供依據。為達到這目標，本項研究分為以下四個內容：了解我國水產品消費水平和結構及其可能的影響因素；建立水產品需求系統模型；通過分別估計食物和水產品需求系統模型，探討我國城鄉居民消費行為，定量分析各種影響因素對水產品及其他食品需求的影響；根據研究結果，討論未來水產品需求總量和結構的變化，為優化漁業生產和合理使用漁業資源提供政策依據。
  17. Also combining strategy management theory, this paper presents the analysis on both external environment ( including macroscopic environment, trade state, trade chance, challenges and prospect ) and internal conditions ( including resources, operation, competitive force ) on some qualitative and quantitative methods such as pest analysis, swot analysis, five - competitive force model, line chart model, value chain, etc. the conclusion is that external environment and the operative condition of donghua is well presently, it is competitive among competitors in this domestic field depending on its strong basement. but enterprise management upon the going one at the same time, there exists some defects such as the lack of market exploitation ability and human resource management, the jump to the track of information technology, the inchoateness of core competitive force, the lagging of financial management, the needing improve of enterprise culture and so on

    本文以武漢東環車身系統有限公司為研究對象，結合戰略管理理論，採用pest分析、 swot分析、五種競爭力模型、折線圖模型、價值鏈等定量與定性的方法對其外部環境（包括宏觀環境，行業狀況，行業機會、威脅及前景）和內部條件（包括資源，經營管理，競爭能力）進行了分析，總結出東環公司目前外部環境和經營狀況良好，自身擁有堅實的基礎，在國內同行中具有一定的競爭實力；但同時公司經營管理中存在著市場開拓能力差、與信息技術脫軌、核心競爭力尚未形成、人力資源管理缺乏、財務管理體系滯后、企業文化急待改進等問題。
  18. Making use of multivariate statistica1 analysis method of mathematical statistics, the ration composite abnormity mode1 is established. we express dispersed geochemical exploration data in image form, and make optimum estimates of unknown values with known values

    本文運用數理統計中的多元統計分析方法，建立定量組合異常模型，將離散型的化探數據表達成圖像形式，利用己知值對未知值作出最佳估計。
  19. At the same time, a key problem to know about the function orientation of the different commonality passenger transport, especially about brt and urban mass transit must be solved firstly in the different phases of the community economics in the big cities of china, which would promote the scheme with limited recourses in reason and used efficiency, and influence the evolving tendency of all kinds of public passenger transport in the city

    如何在我國大城市社會經濟發展的不同階段合理確定城市內部不同類型公共客運交通方式的功能，特別是如何合理進行快速公交與軌道交通的功能定位是快速公交適應性研究的前提，因為它不僅可直接影響城市交通系統當前及未來規劃年內各公共交通方式的發展趨勢，而且可促進城市有限時空資源的合理配置和提高資源的利用效率。
  20. The main research contents are as follovvs : after the analyzing of the process of making train diagram, according with its character, and take into account the trend of innovation, chooses the total solution based on the b / s architecture, 3 - tier operation distributed and 2 - tier data distributed to separate the data from operation and simplify the development and maintenance ; the e - r data model that is accord with the 3nf criterion is designed after analyzing the data structure of the train diagram system. emphasis on the permission security of the distributed system, take the view schema, coupled with the login authentication and permissions validation, to ensure the data accessing domination, and take the synchronization, error control, and restore capability to advance the data security ; on the basis of b / s solution architecture, after comparing the existing transportation technologies, b - isdn and adsl is selected as the major solution architecture based on the package - svvitched networks. furthermore, error control, firewall, and encryption techniques are introduced to prevent the hacker attack and ensure the networks safety

    論文的主要研究內容包括：對目前我國列車運行圖管理體制和編制流程進行詳細分析，根據其「幾上幾下」的特點，並結合未來「網運分離」體制改革的變化預測，選擇採用與之相適應的基於b s體系架構、三層業務分佈、二層數據分佈的整體方案，實現業務與數據的分離，降低開發與應用過程的復雜度和總體成本；對列車運行圖系統的數據信息進行分析，設計符合3nf規范的數據e - r關系模型，並著重研究處于分散式系統中的列車運行圖數據信息的訪問權限和數據安全問題，提出以視圖模式結合用戶識別權限審定實現數據權限劃分，以並發處理、容錯技術、恢復技術提高系統的數據安全性；在基於b s架構的系統整體方案基礎上，對當前多種數據傳輸技術進行分析比較，採用b - isdn為主幹網、 adsl為接入端的基於公用數據網路分組交換技術的系統網路體系結構，並針對網路自身安全性和黑客攻擊與侵入問題，詳細討論綜合採用差錯控制、防火墻、數據加密解密等技術手段提高系統的網路安全性能。
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