預設實在參數 的英文怎麼說

中文拼音 [shèshízàishēnshǔ]
預設實在參數 英文
default actual parameter
  • : Ⅰ副詞(預先; 事先) in advance; beforehand Ⅱ動詞(參與) take part in
  • : Ⅰ動詞1 (設立; 布置) set up; establish; found 2 (籌劃) work out : 設計陷害 plot a frame up; fr...
  • : Ⅰ形容詞1 (內部完全填滿 沒有空隙) solid 2 (真實; 實在) true; real; honest Ⅱ名詞1 (實際; 事實...
  • : 參構詞成分。
  • : 數副詞(屢次) frequently; repeatedly
  • 預設 : default material and textures
  • 實在 : [方言] (of work) well-done; done carefully
  1. This thesis tries to update the cmdsr system to achieve the characters below : real - time, better robust, higher recognition rate, non - special - man. considering the disadvantages of traditional improved spectrum subtraction speech enhancement, this thesis proposes the theory of fuzzy spectrum subtraction based on the fuzzy theory and improved spectrum subtraction speech enhancement ; as for the difficulties of detecting the endpoint of speech signal, the thesis gives the table of initial and the improved parameters, with which we can confirm the endpoints of mandarin digit speech ; the thesis puts forward two - level digit real - time speech recognition system, the first level is based on discrete hidden markov model which is linear predictive coding cepstrum ( lpcc ) and difference linear predictive coding cepstrum ( dlpcc ), the second level is based on formant parameters ; as for the realization of hardware, the thesis depicts the realization of every part of cmdsr based on the tms320vc5402 in detail ; as for the development of software, the thesis gives the software design flow chart of cmdsr, simulates the basic theory with matlab language and gives the simulation results

    針對傳統的「改進譜相減法語音增強」定單一、環境適應能力差的缺點,提出了一種利用模糊理論和「改進的譜相減法」結合的「模糊譜相減法語音增強」 ;針對語音信號端點檢測困難的特點,通過matlab模擬試驗,給出了能夠準確確定碼語音端點的初始和改進表;提出了利用基於線性測編碼倒譜和差分線性測編碼倒譜相結合的離散隱含馬爾可夫模型進行第一級識別、利用共振峰進行第二級識別的兩級漢語碼語音識別系統,保證系統時性的同時,現連接漢語碼語音識別系統識別率的提高;硬體現上,詳細闡述了基於tms320vc5402的連接漢語碼語音識別系統各部分硬體計;軟體開發上,給出了連接漢語碼語音識別的軟體計各部分的流程圖,並對各部分進行了matlab模擬,並給出了模擬結果。
  2. Liquid - solid extrusion of composite material is a new kind of metal forming process, which has been developed in recent years with a promising practical application prospect for its simple working procedure, low cost and good workpiece performance. through a lot of experiments, the optimization and chosing method of key process parameters ( pouring temperature, mold warm - up temperature, impregnating pressure, impregnating time ) has been mastered. under the precondition of appropriate chosing these parameters, the effective control of extrusion velocity is the key of mading good workpiece. but the control of extrusion velocity remains a handwork, and it is heavily affected by such uncertainties as a handler ' s knowledge and skill about the process. in order to solve the problem, the automatic control of the extrusion velocity is studied, and a computer control system is also designed under existing condition

    通過大量驗,已掌握了關鍵工藝(熔液澆注溫度、擠壓模熱溫度、浸漬時間、浸漬力)的優化選取方法。合理選取關鍵工藝的前提下,擠壓速度的控制是成形出質量良好製件的關鍵。但是,目前對于擠壓速度的控制仍停留手動控制階段,利用該工藝制備管、棒材製件的成功與否受操作者對該工藝及其備的經驗及熟練程度等不確定因素影響很大。
  3. On the basis of these, a simplified iced aerodynamics model is established, describes the effects of aircraft icing on aerodynamic parameters. main principle and implement method of iced aircraft envelope protection system are proposed. after ascertain iced aircraft envelope, for pilot and autopilot, open - loop and close - loop aircraft envelope protection control law respective designed, ensure the aircraft will efficiently follow the flight path specified by the pilot in the safe - flight envelope

    此基礎上,建立了簡化的飛機結冰氣動模型,以描述結冰對氣動的影響;給出了結冰飛行包線保護系統的基本原理及現方法,計算確定結冰飛行包線后,對於人工駕駛、自動駕駛飛行兩種情況,分別計了開環、閉環飛行包線保護控制律,保證飛機安全飛行包線內沿著定的航線飛行。
  4. With the using of microsoft visual basic 6. 0, a multimedia computer - aided design system of small type pumping irrigation district is developed in this paper. provided with the live multimedia messages as well as a good man - machine conversation mechanism, this system can help the user to finish the planning of an pumping irrigated area such as the layout of canal system, the selection of pump models, the establishment of the irrigation program, the calculating of canals " parameters, the estimate of the project magnitude, the selection of the field constructions, the economic analysis of the project, the output of results, etc, a new oo ( object oriented ) programming method is adopted in this system, various softwares are integrated in this systems as well by the " automation " technic provided by vb, in addition, the multimedia technic is applied to this system for the first time, it makes the system easy to ope rate. as for the optimization of the canals " section, a new optimization method is adopted based on the existing theories about the canals " section, and in this way, with the purpose of minimizing the project ' s investment as well as a stalized canal, limited by the longituding slope, the canals " best feasible parameters can be deduced. furthermore, a integral method to reckon the earth work is developed in this paper, by this way, the estimate precision of the earthwork is enhanced notably. this paper includes the particular illumination for the developing procedure of each systems " segment, and in the end, the directions of the system are demonstrated in a sample area which lies in the zhaija village, taizhou city, jiangsu province, the running results showed that the initial purposes are achieved effectively, and it has a preferable practicability

    渠道縱橫斷面優化方面,本文利用已經比較成熟的縱橫斷面優化理論的基礎上,提出以工程總費用最小為目標函,以渠道縱坡i為控制變量,以渠道不沖不淤流速及灌區允許地面比降為約束條件,通過縱橫斷面聯動優化的方法得到渠道的最佳工程可行的斷面。另外,針對部分地區的取土困難的狀況,本文採用積分法計算渠道工程土方量,從而大大提高了土方量的估算精度,有助於準確控制工程投資規模及資金投向。本文詳細闡述了該系統所採用的編程方法、系統構成、系統各組成模塊的開發過程以及灌區規劃所採用的優化方法及原理,最後應用本系統對泰州市翟家村機電灌區進行規劃計,運行結果證明其操作比較簡便,界面友好,運行速度快,規劃成果合理,基本達到了系統定的要求,具備較強的用性。
  5. Taking ningxia - inner mongolia reach of yellow river as a study case, a ice regime forecast data warehouse is established for the datamining concerned on the basis of the analysis on the ice regime changing law and its influencing factor of the reach, and then the conceptual mathematic model and artificial neural network model for the parameter calibration of ice regime forecast are built up with gis in combination of the relevant empirical forecast models based on the principles of the hydrological flow muting, thermodynamics and ice hydraulics etc., with which the design and development of the decision support system for the ice regime forecast with the integrated functions of information inquiry, model parameter calibration, temperature forecast and ice regime forecast are preliminarily discussed

    摘要以黃河寧蒙河段為例,對河段歷史冰情變化規律及其影響因素分析的基礎上,建立冰情據庫,進行據挖掘,並以地理信息系統( gis )為平臺,以水文學流量演算、熱力學、冰水力學等原理為基礎,結合相關經驗報模型,建立用測資料進行率定的冰情報概念性學模型和人工神經網路模型,初步探討了集信息查詢、模型率定、氣溫報、冰情報等功能為一體的冰情報決策支持系統的計與開發。
  6. This text completely and systematically studies the status and the development of the pyrolysis and the fluidization of biomass, which distill the bio - oil in the domestic and international area, as well as the existing problems. this thesis primarily include following aspects : ( l ), by experimenting and measuring the energy ( heat value ) and the content of c, h, n chemical element of right 20 kinds of common biomass, on the base of the experimental result, and respectively established the biomass energy predict experiment formula with the element of h and c is from change, and passed the ro. os examination, which provides the basis and convenience for flash pyrolysis fluidization device energy to convert the rate to compute with biomass energy utilization calculation ; ( 2 ), proceeded the tg and dtg experimentation equal velocity ( 10 ? / min, 20 ? / min, 40 ? / min, 60 ? / min ) heating and constant temperature heating by studying on eight kinds of biomass samples, according to the experimental data and arrhenius formula, we established the dynamics model of pyrolysis of, then, using the goast - redfern and p function, we also solved the dynamics parameters and analyze out every kind of biomass ' s frequency factor and parameters of activation energy, and established the every kind of dynamics model of pyrolysis of biomass, all of these provide the theories and basis to make sure the reactor ' s flash pyrolysis work temperature scope design and the describing of pyrolysis reactor dynamics ; ( 3 ), in order to study and ascertain the process of heat completely getting to pyrolysis time of varied size biomass particles, we observed and measured the ratio of length and diameter ( l / d ) with the varied biomass through electron microscope, we concluded the l / d ratios usually is from 5. 0 to 6. 0, the average is 5. 3 ; ( 4 ), we studied the process of biomass transiting and the theory of complete pyrolysis time with the theory of complicated heat field, we got the time ( t ) of the varied size biomass particles arriving to complete pyrolysis, and we knew that the complete pyrolysis time and the time which get to the biggest production ratio are identical, all of these studies provide the theory base for design and forecasting the flash pyrolysis reactor solid state resort time ; ( 5 ), according to the above experiment result, synthesize to make use of the engineering the mechanics, engineering the material, machine the design to learn the principle, deduce, establish the theory of rotation cone flash pyrolysis reactor material resort time ( t ) and reasonable rotation velocity ( or frequency ) relation theory ; and ( 6 ), we gave the reactor ' s smallest cone angle certain, reactor cone wall strength design theory, the reactor production ability theory, the power design method and the critical rotation velocity theory

    本文較全面、系統地綜述了國內外生物質熱解液化制取生物燃油技術研究發展現狀及存的問題,主要研究內容有: ( 1 )驗、測定了20種常見生物質的能量(發熱量)和c 、 h 、 n元素含量,根據驗結果分別建立了以h和c為自變量的生物質能量測經驗公式,並通過r _ ( 0 . 05 )檢驗;為閃速熱解液化裝置能量轉化率計算和生物質能量利用率計算提供了依據和方便; ( 2 )選擇了8種生物質試樣作了等加熱速率( 10 min 、 20 min 、 40 min 、 60 min )和恆溫加熱的tg和dtg驗,根據據和阿倫尼烏斯公式建立了生物質熱解反應動力學微分方程,並採用goast - redfem積分法和p函對其動力學進行了求解,解析出各種生物質的頻率因子和活化能,進而建立了各種生物質的熱解動力學模型,為科學確定反應器的閃速熱解工作溫度范圍及熱解反應動力學描述,提供了理論和依據; ( 3 )為研究和確定不同尺度的生物質顆粒中心達到全熱解的時間,體視顯微鏡下對不同粒度的生物質顆粒的長徑比進行了驗觀察和測定,得出生物質的長徑比( l d )一般5 . 0 6 . 0之間,平均為5 . 3的結果; ( 4 )採用復雜溫度場傳熱學理論對生物質傳熱過程及充分熱解時間理論進行了研究,解析推導出了不同尺寸生物質顆粒中心溫度達到充分熱解溫度的時間( t ) ,得出了理論推導的充分熱解時間與最大產油率的熱解時間相一致的結果,為閃速熱解反應器固相滯留時間計和測提供了理論依據; ( 5 )根據上述驗結果,綜合運用工程力學、工程材料、機械計學原理,推導、建立了轉錐式閃速熱解反應器物料滯留時間( )與轉速(或頻率)合理匹配理論; ( 6 )提出了轉錐式閃速熱解反應器的最小錐角計、錐壁強度計、生產能力計理論和功率計算方法及臨界轉速理論等。
  7. The static loading test for three group of testing piles of jiading power plant secend stage project are analyzed and studied in this thesis, and the practical applying of high - accurate data collector, technique of waterproof insulation and testing technique of burying in the body of pile are introduced also. the vertical and horizontal loading features of three group of piles of different kind and constructing technique in different earth layer at the pile point are analyzed and compared and summed up with basic integro - differential equation calculating the pile earth system load transmit, transforming principle of stress - deforming and pile body rating of burying electric measuring element. changing law of stress, and changing law of pile body shifting and bending for different testing piles under vertical and horizontal load are showed so that the loading features of soil layer and pile at testing spot, reliable design data for pile type and base for scientific construction technique are provided

    本文僅就嘉定電廠二期工程中的三根試驗樁的靜載試驗進行了分析和研究,利用樁土體系荷載傳遞分析計算的基本微分方程及應力-應變轉換原理,結合埋電測元件的樁身率定,對三組不同種類、不同施工工藝、不同持力層中的樁的豎直、水平承載特性進行了分析、比較和歸納,通過大量、全面的據,經過整理、轉換和推演,揭示了不同試驗樁豎直、水平荷載作用下的應力變化規律和樁身變位、撓曲變化規律,最終提供試驗場地土層和樁的承載特性,為該工程合理計樁型提供了可靠的,為確定科學的施工工藝提供了有力的依據。
  8. In the design of system software, we take account of the numerical format considering a fixed - point dsp tms320f240, the software designs of the current model and software svpwm model, and the online realization of parameters setting and changing in pc

    軟體方面,重點論述了適合於定點dsp的系統變量字表述形式、電流模型模塊和軟體空間矢量模塊的計以及pc機控制對象置和修改的現。
  9. Secondly, based on the characteristic datum extracted from the datum of daily peak load, the probability model of the nature random part of power load is established ; the grey gm ( 1, 1 ) model is improved to forecast the basis part of power load ; after the relation model is established on the basis of the researching the relationship between the climate part of power load and climate factors, the probability model of the climate part of power load is established combined with the tentative probability model of temperature

    然後,日最大負荷據中提取自然隨機分量的特徵據,建立其概率模型並估計;改進灰色gm ( 1 , 1 )模型,完成年最大負荷中基礎負荷分量測;研究氣候負荷與各氣候因素的關系,建立合理的氣候負荷與溫度關系模型,結合假溫度概率模型,完成年最大負荷中氣候負荷分量的概率模型建立。
  10. This paper bring out design method of inverse eigenvalue problem, which adapts to general structures with linear parameters, namely coefficients of all or partial elastic component and inertial component are treated as design parameters, for given some order natural frequency and corresponding vibrating mode, all of useable designing parameters will be got through solving a linear system of equations, thereby stiffness matrix and mass matrix of actual structure are constructed. this paper also discusses existence condition and unique of results

    提出了適用於具有線性的一般結構的逆特徵值問題的計方法,即以系統的全部或部分的彈性元件與慣性元件的系,對于先給定的若干階固有頻率及相應振型,通過求解一線性方程組即可確定全部際可行的計變量,從而構造出際結構的剛度矩陣和質量矩陣,並論證了解的存性與唯一性。
  11. Using the microwave selective heating property for materials, by setup equivalent equation, and first time inducing the electromagnetic field perturbation theory to the design of heating materials for substrate in mpcvd, three temperature distribution modes were established, including temperature distribution comprehensive mode of inhomogeneous plasma, temperature distribution composite mode of composite substrate materials, temperature distribution perturbation mode of composite materials, which ii provided an whole new technology route to the design of substrate heating system in mpcvd and guided the preparation of heating materials for substrate. and then the heating materials for substrate were designed and optimized to obtain large area homogeneous temperature distribution even larger than substrate holder ' s diameter. as an important part, this thesis researched the nucleation and growth of diamond films in mpcvd, systematically researched the effects of substrate pretreatment, methane concentration, deposition pressure and substrate temperature etc experimental technologic parameters on diamond films " quality on ( 100 ) single crystal silicon substrate in the process of mpcvd, characterized the films qualities in laser raman spectra ( raman ), x - ray diffraction ( xrd ), scanning electron microscopy ( sem ), infrared transmission spectra ( ir ), atomic force microscopy ( afm ), determined the optimum parameters for mpcvd high quality diamond in the mpcvd - 4 mode system

    該系統可通過沉積的精確控制,以控制沉積過程,減少金剛石膜生長過程中的缺陷,並採用光纖光譜儀檢測分析等離子體的可見光光譜以監測微波等離體化學氣相沉積過程;利用微波對材料的選擇加熱特性,通過構造等效方程,並首次將電磁場攝動理論引入到mpcvd的基片加熱材料的計中,建立了非均勻等離子體溫度場綜合模型、復合介質基片材料的復合溫度場模型及復合介質材料溫度場攝動模型,為mpcvd的基片加熱系統計提供了一條全新的技術路線以指導基片加熱材料的制備,並對基片加熱材料進行了計和優選,以獲取大面積均勻的溫度場區,甚至獲得大於基片臺尺寸的均勻溫度區;作為研究重點之一,開展了微波等離體化學氣相沉積金剛石的成核與生長研究,系統地研究了( 100 )單晶硅基片上mpcvd沉積金剛石膜的驗過程中,基片處理、甲烷濃度、沉積氣壓、基體溫度等不同驗工藝對金剛石薄膜質量的影響,分別用raman光譜、 x射線衍射( xrd ) 、掃描電鏡( sem ) 、紅外透射光譜( ir ) 、原子力顯微鏡( afm )對薄膜進行了表徵,確立了該系統上mpcvd金剛石膜的最佳的驗工藝
  12. The purpose of this paper is to introduce the most important methods available for the prediction of pressure drop in venturi scrubbers in addition, the predicted values of various methods are compared with the experimental data from venturi scrubbers of different sizes under operating conditions for the purpose of providing theory groundwork for practical design

    本文對國內外用於計算文丘里洗滌器壓力損失的研究成果,即經驗關聯式、解析解法與值解法進行了簡單地介紹,並將由不同的計算方法得到的測值與本文作者測的據進行分析比較,以期為計者進行文丘里洗滌器計或優化操作時選用合適的計算方法提供理論考。
  13. On - line monitoring of hvcb is the precondition of predicting maintenance, is the key element of reliable run, and is the important supplement to the traditional off - line preventive maintenance in fact, the faults are made by hvcb, no matter in number or in times, is over 60 % of total faults so it has determinative importance for improving the reliability of power supply and this can greatly decrease the capital waste used by - dating overhaul in this paper, the inspecting way of hvcb mechanism characteristic is discussed the concept of sub - circuit protector is presented, the scheme that we offered has been combined with sub - circuit integrality monitoring theory, to ensure that it has the two functions as a whole according the shut - off times at rated short circuit given by hvcb manufacturer, the electricity longevity loss can be calculated in each operation, and the remained longevity can be forecast too an indirect way for calculating main touch ' s temperature by using breaker shell temperature, air circumference temperature and breaker ' s heat resistance is improved in this paper, and main touch resistance can be calculated if providing the load current msp430, a new single chip microcomputer made by ti company, is engaged to develop the hardware system of the on - line monitoring device, and special problem brought by the lower supply voltage range of this chip is considered fully

    高壓斷路器所造成的事故無論是,還是事故所造成的停電時間上都占據總量60以上。因此,及時了解斷路器的工作狀態對提高供電可靠性有決定性意義;並可以大大減少盲目定期檢修帶來的資金浪費。本文論述了斷路器機械特性監測方法;提出了二次迴路保護器的概念,並將跳、合閘線圈完整性監視和二次迴路保護結合起來,給出具有完整性監視功能的二次迴路保護器現方案;根據斷路器生產廠家提供的斷路器額定短路電流分斷次,計算每次分閘對應的觸頭電壽命損耗,測觸頭電壽命;提出根據斷路器殼體溫度和斷路器周圍空氣溫度結合斷路器熱阻來計算斷路器主觸頭穩態溫升的方法,並根據此時的負荷電流間接計算主觸頭迴路的電阻;硬體電路計上,採用美國ti公司最新推出的一種功能強大的單片機msp430 ,並充分考慮該晶元的適用電壓范圍給計帶來的特殊問題;通信模塊的計中,解決了不同工作電壓晶元之間的介面問題,並給出了直接聯接的接線方案。
  14. The sprt was used to test error residual matrix between estimated matrix and measured matrix. based on the test result, it need to validate single parameter if necessary. finally, the on - line run status of the system and its parameters that whether natural or not are judged through these processes

    通過鍋爐專家制定的試驗計方案得到了有效的據,利用最值模型以及向量排序模型篩選出記憶矩陣,然後通過記憶矩陣對觀測矩陣進行時訓練得到測矩陣,再利用sprt方法對測矩陣與觀測矩陣的殘差矩陣進行檢驗,對檢驗結果判斷,如有必要需對單進行驗證,最終通過這個過程判斷出系統及各個線運行的穩定性。
  15. The control system of wind turbine includes individual control and group control. according to the control process and main technical parameter, the paper accomplishes the control system structure design and input - output system design. this paper also deeply analyzes the operation principle of the whole control system and the relation between each part in order to realize the no - person automatic operate

    本文以1mw變槳距風電機組為研究對象,根據其主要技術及控制工作過程,對其單機控制系統的構成進行了計,闡述了輸入輸出介面和各個控制環節的運行原理及其相互之間的聯系與約束關系,從而無人值守的條件下,現多種定的控制目標,並此基礎上探討其更廣泛的適應性及用性。
  16. Use the soft of blasting demolition of blasting demolition of reinforced concrete framing structure, we can optimize the mode of blasting detonation, detonation parameter etc, and predict the effect of blasting. taking advantage of delphi ' s power function, we develop a interactive graphics and some analysis tools. at the same time, we use 3ds max make a animation of blasting demolition of reinforced concrete framing structure

    利用值分析方法,計算機上編程求解;建立拆除爆破例庫、拆除爆破庫,完成對拆除爆破方案的選取、爆破計、拆除爆破效果的測,開發出能夠對錄像、照片等資料進行分析的工具,建立互動式的圖形處理系統,完成對系統成果的靈活輸出,並製作出接近際的鋼筋砼框架結構建築物拆除爆破過程的三維動畫效果演示。
  17. 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? ?方差模型僅僅是資產組合收益率正態分佈假條件下基於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明顯不成立,證檢驗表明基於資產組合收益率正態分佈假條件下的方差? ?協方差模型對國內資產組合風險的測存較大的偏差,由於文中證明收益率正態分佈假條件下基於方差? ?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測同樣會存著較大的偏差,而半var風險管理模型則能夠取得較好的測衡量效果; ( 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。
  18. Based on the reservoir bank protection project, the reconnaissance design, the construction, distortion slope body technical and so on, and according to the ecological prospecting and the forecast appraisal achievement of mountainous area reservoir runned for many years, through actual investigation of the collapses of the bank, the distribution distortion, the types and forming conditions, the collapses formation mechanism of the bank and the types of the pattern are analyzed, and of the bank collapsing parameter of each kind of gneiss under and above water stable angle of slope and so on are confirmend

    摘要利用已運行多年的山區型水庫地質勘探、測評價成果,掌握庫岸防護工程的勘察計、施工及變形坡體的監測等技術資料的基礎上,通過對塌岸及變形的分佈、類型及形成條件等方面問題的測調查,分析塌岸效應的形成機制及模式類型,確定各類巖土體的水下及水上穩定坡角等塌岸
  19. At first, the author has analyzed the theory, mechanism and shock - absorption in pre - split blasting, studied the rising of crack, expanding and stopping, and did various factors which influence on the crack of rock in pre - split blasting. the main factors have been determined to be the strength of mineral and rock, the diameter of drill, the type of explosive and the growth degree of crack. then, the author has researched bp neural networks " work principle, structure and defectiveness

    首先分析了巖石成縫的理論、機理和減震作用,研究了裂紋的起裂、擴展和止裂;分析了各種因素對巖石裂爆破成縫的影響,確定了礦巖強度、孔徑、炸藥類型和裂隙發育程度作為主要影響因素;並研究了bp神經網路工作原理、結構和缺陷,把改進的bp神經網路運用巖石裂爆破計中,建立以礦巖強度、孔徑、炸藥類型和裂隙發育程度為主要影響指標的bp神經網路的裂爆破計識別模型;運用matlab6 . 5語言開發了爆破計的智能系統,現了裂爆破計的自動化,用工程例驗證系統模塊的功能。
  20. Then we also study the effect of string on the dynamical characteristic under the symmetric load and not under the symmetric load as the prestressing is the key making beam string structure the balanceatie system, having large rigidity and embodying the superiority of dynamical characteristic of this structure, this paper studies and conceives how to deteimine the number of the prestressing in each stage of construction and through comparing between the plan of onetime and repeated pulling construction choose the suitable pulling construction plan

    並且本文還研究了對稱荷載和不對稱荷載兩種工況下,結構的受力性能隨豎向撐桿目、結構垂跨比以及下弦索應力等改變時的變化情況,總結出該結構受力方面的特徵,為際工程計提供依據。鑒于應力是使張弦梁結構形成自平衡體系、具備較大剛度和體現結構性能優勢的關鍵,本文研究和探討了結構施工各階段該應力大小的確定方法,通過一次張拉與二次張拉方案各項指標的比較,選擇適當的應力張拉施工方案。
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