無偏壓的 的英文怎麼說

中文拼音 [wúpiānyāde]
無偏壓的 英文
unbiased
  • 無 : 無Ⅰ動詞（沒有） not have; there is not; be without Ⅱ名詞1 （沒有） nothing; nil 2 （姓氏） a surn...
  • 偏 : Ⅰ形容詞1 （不正; 歪斜） inclined to one side; slanting; leaning 2 （只側重一面） partial; prejudi...
  • 壓 : 壓構詞成分。
  • 的 : 4次方是 The fourth power of 2 is direction
  1. First, passive resistance network was selected as direct current biasing network, which offered direct voltage for base through the resistance voltage divider composed of two resistances, among them the upper resistance connected from the dc to base, the lower resistance connected from the base to ground. the collector connected with dc directly

    直流偏置網路採用無源電阻網路，通過由兩個電阻組成的電阻分壓器為基極提供直流電壓，上偏電阻從電源串聯到基極，下偏電阻從基極到地，集電極直接加電。
  2. Furthermore, the existing theory can ’ t explain the photocurrent gain, so the i - v characteristics under illumination are the keystone of the research work

    並且現有理論無法解釋光增益現象，因此穩態光照下電流隨偏壓變化的關系成為本文研究的重點之一。
  3. The second, at the high frequency primary coil, when switch turn on with control signal ( the spwm pulse is modulated ), in the positive or negative semi - period of low frequency modulation signal, transformer coil with same direction voltage. the magnetic flux of transformer core will increase step by step. at the end, it leads to magnetic flux saturation

    二、在高頻變壓器原邊，當開關管接收控制信號脈沖列（經調制的spwm波列）導通時，在低頻調制信號的正半周或負半周內，施加在變壓器繞組上的是同一方向的電壓，變壓器磁芯中的磁通可能將級進地逐漸增加，導致磁芯飽和，造成磁偏或單向磁化，導致低頻電信號放大失真或由於很大的磁化電流而無法正常工作。
  4. Effects of diverse environmental factors on the growth rate ( od4oo ) and nitrogenase activity ( ara ) of the strain w12 hi nitrogen - free culture were investigated in our experiments. the results implied that the strain w12 could easily adapt to different cultural conditions : it could use various carbon sources ( especially glucose, sucrose, malic acid, mannitol ), propagate quickly and fix nitrogen at a temperature range of 15 ? to 40 ? and at 25 - 35 ? for optimum, at a ph range of 4 to 8. 5, at a saline concentration range of 0. 01 % to 1. 5 % ; low nlv " concentration had little effect on its nitrogenase activity. ara could also be detected when it grow in the culture media with 5mmol / l ntv "

    W12菌株對環境因子的適應性研究：無氮培養條件下，測定溫度、碳源、酸堿度、滲透壓對w12生長及固氮能力的影響，結果表明，在15 - 40下均能生長並表達固氮酶活性，其最適生長及固氮的溫度為25 - 35 ；能利用葡萄糖、蔗糖、蘋果酸、甘露醇等多種碳源生長並固氮，當培養基中同時存在蔗糖和蘋果酸時，細菌生長和固氮活性最強；在偏酸和偏堿的條件下（ ph4 . 5 - 8 . 5 ）均能保持較強的生長勢和較高的固氮酶活性，並能通過調節自身代謝平衡並適應環境的酸、堿性變化，使培養液趨于中性：能耐受較高的滲透壓，培養液中卜、 5 naci濃度對其生長和固氮酶活性影響不大，當naci濃度升至2時，菌株的生長勢及固氮酶活性才有所下降：低濃度的鉸對其固氮酶活性影響不大，在0
  5. According to non - newtonian fluid mechanics theory and mathematical method, conbined with plunger moving property, the hypothesize fluid is imcompressive, hydraulic radius of flow of liquid in crevice is very little, and it is laminar flow, the flow is treated fixed continuous flow at every instant position of plunger, equation of motion and boundary condition were set up in condition of concentric and eccentric of pump barrel and plunger

    運用非牛頓流體力學理論和數理方法，結合抽油泵柱塞運動特點，假設液體為不可壓縮的，液體在縫隙中流動的水力半徑很小，呈層流流動，柱塞在每一位置的瞬間，流動做定常流處理，建立了泵筒與柱塞同心和偏心兩種情況下運動方程和邊界條件，引入無量綱坐標、無量綱速度和柱塞與泵筒偏心配合時的縫隙高度，並給出縫隙流流速、流量的解析解。
  6. Taking load uncertainties, infeasibility problem and multiple objection of the reactive power optimization in the radial distribution system into consideration, loads are modeled as fuzzy interval numbers. fuzzy power flow is proposed based on fuzzy interval load for the more practical membership function of line losses rate and maximal voltages offset. this thesis presents multiple objection model of the reactive power optimization considering uncertainties using the fuzzy set theory

    對配電網電壓無功優化問題中負荷的非概率性的不確定性問題、多目標問題、約束不可行性問題進行了研究，用模糊區間來描述實際的負荷情況，並用負荷的模糊區間值計算配電網的潮流，得到有功功率損耗和電壓的模糊區間值，使網損率和節點電壓最大偏移量的隸屬函數更接近實際情況；將改進遺傳演算法與模糊集理論相結合，通過求解多目標函數和約束條件的模糊集合的交集，得出網損率和節點電壓最大偏移量最小的最優運行狀態。
  7. In the same way, we should consider the problem that reactive power surplus and over - voltage during the period of low - water and low load

    同樣在枯水期輕負荷時，我們也要考慮到無功功率過剩，系統電壓偏高的問題。
  8. Results indicate that with the approximation of _ ( 0 ) _ ( 0 ) - grtlneisen equation of state is usable to describe the release isentrope of ofhc copper in the present pressure range. in addition, the difference ( w - 2u ) becomes greater with the increase of shock pressure, where w is the measured particle velocity at the final release state ( 1 atm ) and 2u is computed from the mirror line of hugoniot

    卸載路徑的計算和分析表明：在所研究的壓力范圍，無氧銅的等熵卸載過程用gr neisen狀態方程在_ 0 _ 0 =近似下的描述是適用的；卸載到一個大氣壓的終態粒子速度w與鏡像反演的粒子速度2u的偏差，隨沖擊波壓力的增加而增大。
  9. During the previous calculation of reactive power and voltage in the power network, reactive power insufficiency and the system under - voltage are always concerned

    在以往的無功電壓優化計算中，對于無功功率不足和系統電壓偏低的情況一直是人們關注的問題。
  10. Abstract : the generalized shrunken prediction of finite population is introduced, using generalized shrunken least squares estimator of linear regression models. with respect to prediction mean squared error, a necessary and sufficient condition for superiority of a generalized shrunken prediction over the best linear unbiased prediction is obtained. in the case of linear combination of every unit index, a linear restricting prediction is introduced and then a necessary and sufficient condition for superiority of linear restricting prediction over the best linear unbiased prediction is devived

    文摘:利用線性回歸模型的廣義壓縮最小二乘估計，引入了有限總體的廣義壓縮型預測，在預測均方誤差意義下，得到了廣義壓縮型預測優于最佳線性無偏預測的一個充分必要條件；在只能得到每個個體指標的線性組合時，引入了一種線性約束型預測，並得到了線性約束型預測優于最佳線性無偏預測的一個充分必要條件
  11. During the calculation of reactive power and voltage in the power network, reactive power insufficiency and the system under - voltage are always concerned. in the same way, we should consider the problem that reactive power surplus and over - voltage during the period of low - water and low load

    在無功電壓優化計算中，對于無功功率不足和系統電壓偏低的情況一直是研究者關注的問題；同樣在枯水期輕負荷時，電網運行中也要考慮到無功功率過剩，系統電壓偏高的問題。
  12. Petkovic was called up by his father ilija after striker mirko vucinic was forced to withdraw through injury, but pulled out of the squad on tuesday after a row over favouritism, claiming he could not handle the pressure

    皮特科維奇在射手米爾科.武齊尼奇因傷病被迫退出后被他的父親伊利亞徵召入隊，但在周二關于偏愛的爭論之後離開了球隊，並聲明他無法承受壓力。
  13. In this paper, both speckles filtering in space and wavelet based methods is used to reduce the speckle. analysis is done to compare the result of filtering. the paper uses enhanced lee filter, unbiased gmap algorithm, shrinking of wavelet coefficients algorithm, wavelet analysis with wiener filter, wavelet analysis with space filter to filter the speckle in four different sar images, and gives a suggestion for the choice of right filter in different situation

    分別選用增強lee濾波演算法、無偏gmap演算法、小波系數壓縮濾波演算法、小波變換與維納濾波相結合、小波變換與空間濾波相結合的方法對四幅不同的sar圖像進行濾波，指出了各濾波演算法對不同圖像處理的優缺點，給出了在不同應用環境下，選擇使用不同濾波器的意見。
  14. Abstract : many rural systems are short of compensation devices of reactive power. it results in low quality of voltage and excessive loss in power lines. this paper proposes to install capacitors on power lines and theoretically analyzes the optimal scheme of compensation and obtained benefits

    文摘:針對許多農網缺乏無功補償裝置，造成電壓質量低劣、線損偏大的問題，提出了在線路上加裝電容器進行補償，並理論分析了補償的最佳方案及其取得的效益
  15. This algorithm improves confidence in se by estimating parameters and states at the same time. simulation results on test power systems which range in size from 4 to 118 buses, have shown the virtues as follows : getting unbiased estimation without detecting and identifying bad data in measurements ; solving state and parameter estimation for power system with good convergence and excellent robust property ; increasing the numbers of iterations a little bit with the test systems expanded ; estimating many transformer taps simultaneously and remaining the main state estimation ; keeping the estimated relative error within + 0. 1 % and processing efficiently equality constraints and ill condition with polynomial complexity

    對ieee ? 4 118節點系統和廣西主網進行的模擬結果表明： l1范數估計具有不良數據拒絕特性，當量測量中存在不良數據時，該演算法在不經檢測和辨識不良數據情況下仍是無偏估計，具有良好收斂性，所需迭代次數隨著問題規模擴大而增長極小；能夠同時估計多個變壓器抽頭，並保持狀態估計主體；在滿足可觀測性條件下，估計的相對誤差保證在0 . 1以內；能夠有效處理等式約束和病態條件，並具有多項式時間性。
  16. Latest progresses on some fundamental and important problems about information fusion in sensor networks are presented, including the multisensor distributed decision in the most general case in the sense of globally optimal fusion ; the optimal dimension compression of the sensor observations or local estimates ; the best linear unbiased estimation fusion formula and the efficient iterative algorithm ; the distributed kalman filtering fusion for the multisensor dynamic systems with cross - correlated sensor noises ; and the fault - tolerant interval estimation fusion

    摘要系統地闡述了傳感器網路環境中幾個基本而又重要的信息融合問題的最近進展，包括：最一般條件下全局最優的多傳感器分散式統計判決；傳感器觀測數據或局部估計的最優維數壓縮；一般條件下最優線性無偏估計融合公式及其有效演算法；傳感器觀測噪聲相關情形下動態系統的卡爾曼濾波融合；容錯條件下的區間估計融合。
  17. The rbf network has a better performance, and better forecasting accuracy. then mathematical model of substation voltage / var control is constructed, the squares minimization of voltage differences as target, also considering requirement of voltage and power balance, taking it into consideration that the magnitude constraint of transformer ratio and compensating capacitor, also that constraint of operation times of one day transformer tap and capacitor switch

    因此提高了學習性能，具有較好的預測精度。然後，建立變電站電壓無功控制的數學模型，考慮電壓的調壓要求和無功功率平衡，計及變壓器變比和並聯補償電容的上下限約束，變壓器分接頭和電容器允許的日調節次數的限制，以電壓偏差的平方和最小為目標函數。
  18. The photoconductive uv detectors based on zno : al thin films, having a metal - semiconductor - metal ( msm ) structure with interdigital ( idt ) configuration, were fabricated by using au as a contact metal. the characteristics of dark and photocurrent of the uv detector and the uv photoresponse of the detector were investigated

    同時， au和zno : al薄膜間已形成歐姆接觸，無光照時，暗電流很小，當用= 350nm的光照射器件時，在6伏偏壓時，光生電流為58 . 05 a 。
  19. First, we extended the liberman model of collisionless rf sheath. taking into account elastic collisions and charge - exchange collisions between ions and neutral particles, we established a self - consistent model describing the dynamics of rf sheath driven by a sinusoidal current source. the effects of collisions and rf - biased source power on the instantaneous thickness of the rf sheath and the sheath electric fields were studied

    首先將liberman的無碰撞射頻鞘層模型進行推廣，考慮了離子與中性粒子的電荷交換碰撞效應，建立了描述碰撞射頻等離子體鞘層動力學特性的自洽模型，研究了碰撞效應，射頻偏壓，電源參數等對射頻鞘層的瞬時厚度及電場分佈的影響。
  20. The distance from figure center of the parabola to the potential slide surface is less than half of the section length. mechanical conditions of this method include not only force equilibrium but also moment equilibrium. as for the beam - on - foundation, its pressure can be calculated by homogeneous hypothesis or winkler foundation hypothesis or infinite half elastic foundation hypothesis on the pulling anchor - cable step and by coulomb active earth pressure theory approximatively on the long term working step

    對于樁在滑面以上段所受的坡體荷載，提出可按形心偏下的拋物線型分佈模式計算，並在滿足力的平衡條件的同時還滿足力矩平衡條件；對于地樑上作用的坡體荷載，提出在錨索張拉階段可按均布或溫克爾（ winkler ）地基假定或彈性半無限體地基假定來計算，在工作階段則一般可以近似按庫侖主動土壓力理論計算。
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