時間恆定系統 的英文怎麼說

中文拼音 [shíjiānhéngdìngxìtǒng]
時間恆定系統 英文
time-invariant system
  • 時 : shí］Ⅰ名1 （比較長的一段時間）time; times; days:當時at that time; in those days; 古時 ancient tim...
  • 間 : 間Ⅰ名詞1 （中間） between; among 2 （一定的空間或時間里） with a definite time or space 3 （一間...
  • 恆 : Ⅰ形容詞1 （永久; 持久） permanent; lasting 2 （平常; 經常） usual; common; constant Ⅱ名詞1 （恆心...
  • 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...
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 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 ...
  • 時間 : time; hour; 北京時間十九點整19 hours beijing time; 上課時間school hours; 時間與空間 time and spac...
  • 系統 : 1. （按一定關系組成的同類事物） system 2. （有條理的;有系統的） systematic
  1. Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet - parameter on evaporator. fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio - parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping

    本文的主要內容如下： 1 ）對翅片管蒸發器結構特點進行分析，選取適當的微元控制體，就干、濕和霜工況下對每個微元分別進行傳熱傳質分析，基於經驗關系式確定霜的有關參數，對于霜工況下的霜生長建立模型，經適當假設，運用質量守恆、能量守恆和動量守恆方程建立適合動態模擬的蒸發器數學模型，為系統模擬奠定基礎； 2 ）對蒸發在大擾動下的開、停機過程，運用動態集中參數模型進行分析和計算，為更好地描述製冷系統運行的全過程奠定基礎，同時也為製冷系統實現自動控制提供一定的理論基礎； 3 ）對蒸發器正常運行過程，運用動態分佈參數和參數間定量耦合的觀點來分析和計算，為更好地了解穩態工況下各點參數的變化情況及各入口參數對蒸發器動態特性的影響即蒸發器性能對各參數變化的敏感性； 4 ）編寫翅片管蒸發器動態特性模擬計算程序，可以計算不同邊界條件和初始條件下的製冷劑熱力參數、空氣溫濕度和霜厚度分佈場，實現對翅片管蒸發器在干、濕和霜工況下的動態模擬。
  2. And a intelligent battery management system with full functions has been designed, which improved the management of charge and the estimation of residual capacity. the paper changed the current value of constant current charge - state, which current seems not constant during the working time, based on the three mice laws about battery charge. this change would increase the speed of charge, without harm to the battery

    同時本論文還設計了一套功能齊備的蓄電池智能管理系統，針對蓄電池管理中的充電管理和剩餘時間預測進行了改進，提出：在恆流充電時，根據麥斯三大定律，改變恆流充電時的恆流值，使恆流充電「不恆流」 ，而是根據放電的不同情況進行充電，充分提高充電速度，同時又不損傷電池活性物質；不再進行剩餘容量預測，而是進行剩餘時間預測，提供更加切實可行的信息，並且提出了一種簡單易行的剩餘時間預測的方法，給出了預測實驗的結果。
  3. Under the control of a current loop, the system can make advantage of the motor ' s ability of over - current with a maximum limit, as a result, the motor can implement constant - current staring under a maximum let - through current. therefore, the motor ' s rotational speed can rise at a maximum acceleration and reach the given speed within the shortest time

    在電流環的控制下，系統在起動的時候能夠最大限度的發揮電機的過流能力，使電機以最大允許的起動電流恆流起動，則電機轉速可以以最大的加速度上升，並且以最快的時間達到給定轉速。
  4. After a careful comparison we found : ( 1 ) rotating the coordinate system around the z - axis for each event is necessary for the relaxation of the correlation between thrust ( or sphericity ) major - minor frame and the direction of the first hard gluon emission. ( 2 ) the horizontal factorial moments ( hfm ) are equivalent to the vertical ones ( vfm ) only after cumulant - variable transformation. therefore, in the study of nonlinear phenomena in high energy collisions the hfm can be used only in combination with the cumulant variables

    工jlnfy4ww ； 6標系與發射第一個硬膠子之間的關聯效應，從而觀察到全部強度的動力學起伏；證明了：只有在引入累積變量以後，橫向矩才等於縱向矩，從而也才等效于幾率矩，困而只有在這時，橫向矩才能被使用；論證了：對eb對撞末態粒子系統動力學起伏的研究只能在全相空間進行，而不能用限定的相空間，因而只能採用丟掉最初的一個或幾個點的方法消除動量守恆對相空間標度特性的影響。
  5. 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在的問題，主要研究內容有： （ 1 ）實驗、測定了20種常見生物質的能量（發熱量）和c 、 h 、 n元素含量，根據實驗結果分別建立了以h和c為自變量的生物質能量預測經驗公式，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實驗，根據實驗數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函數對其動力學參數進行了求解，解析出各種生物質的頻率因子和活化能參數，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，在體視顯微鏡下對不同粒度的生物質顆粒的長徑比進行了實驗觀察和測定，得出生物質的長徑比（ l d ）一般在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設計和預測提供了理論依據； （ 5 ）根據上述實驗結果，綜合運用工程力學、工程材料、機械設計學原理，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設計、錐壁強度設計、生產能力設計理論和功率計算方法及臨界轉速理論等。
  6. The endurance function of the insulation field is widely concerned in the power system. according to the equality between the two dimensional weibull distribution and the law of electrical aging, after the method for estimation of the voltage endurance coefficient is presented by the maximum likelihood estimation and the minimum square estimation of the two dimensional weibull distribution parameters, on the basis of the analysis of the test disadvantages under invariable voltage, the method of obtaining the voltage endurance coefficient under the intension increased by degrees is considered

    電氣絕緣電老化性能是電力系統普遍關注的問題，由於二元weibull分佈與電老化定律在評價絕緣老化特性上存在等價性，本文首先介紹了二元weibull分佈參數採用極大似然法和最小二乘法估計獲得電壓壽命指數的方法，同時在分析其在恆定電壓下試驗容易出現，由於電壓選擇不當導致試驗時間過長現象的基礎上，討論了利用場強遞增方式確定電壓壽命指數的方法。
  7. At the same time, figures involving attribute data about flow field at inlet and outlet downstream or wave motion of water at the downflow head of lock chamber of siyang navigation lock were displayed through gis application system which we developed. according to data of baoying navigation lock acquired by mathematics model, figures about velocities which have the same value, velocities toward cross direction which have the same value and flow field at inlet and outlet upstream were formed. achievement data, space information and attribute information were in connection with figure so as to search for and analysis the information, which is satisfying

    同時完成了江蘇泗陽船閘下游引航道非恆定流及其改善措施的計算分析研究和寶應船閘上游引航道口門區水流條件計算分析研究，運用gis技術和所設計的gis應用系統對泗陽船閘下游引航道內流場以及下閘首水位波動情況進行信息顯示，根據對寶應船閘的計算結果生成上游引航道口門區等流速圖、橫向流速等值線圖和流場圖，使計算分析成果數據、空間信息、屬性信息與圖形顯示有機結合，便於查詢分析，效果令人滿意。
  8. The simulation results of wcdma uplink is presented and analyzed. it shows that the combined power and rate control scheme achieve good spectrum efficiency and keep the data rate constant over long time periods

    模擬結果顯示我們提出的基於sir平衡的功率速率聯合控制方案使系統有很好的頻譜效率並在長時間保持數據速率為一個恆定值。
  9. Standard test method for time - to - failure of plastic piping systems and components under constant internal pressure with flow

    在恆定內流動壓力下塑料管道系統和組件損壞時間的標準試驗方法
  10. The motion orbits, vibration time histories and imbalance response curves of the rotor system at different magnetic field frequencies and densities were measured and compared with those at steady magnetic field

    通過測量不同磁場頻率和強度下轉子系統的運動軌道、振動時間歷程和不平衡響應曲線，並與恆定磁場下的結果進行了比較。
  11. On the basis of accomplishing 2. 5 dimension nc function, the system realizes pressure feedback control in z - axial by detecting machining pressure between the tool and the workpiece in real time with a sensor in order to keep machining pressure invariable

    在完成2 . 5維數控功能的基礎上，該系統使用壓力傳感器實時檢測工具和工件之間的加工壓力，並以此壓力信號對z軸實施反饋控制，以保持加工中的壓力恆定。
  12. Abstract : the saturation behavior of stress current is studied. the three types of precursor sites for trap generation are also introduced by fitting method based on first order rate equation. a further investigation by statistics experiments shows that there are definite relationships among time constant of trap generation, the time - to - breakdown, and stress voltage. it also means that the time constant of trap generation can be used to predict oxide lifetime. this method is faster for tddb study compared with usual breakdown experiments

    文摘:基於一階速率方程，討論了恆定電壓應力下應力電流的飽和行為.通過對應力電流的擬合，發現存在三類缺陷產生的前身.更進一步的統計實驗顯示，在缺陷產生時間常數、擊穿時間以及應力電壓之間存在著明確的關系.這意味著缺陷產生時間常數能夠被用於有效預測氧化層的壽命.與常規的氧化層擊穿實驗相比，基於缺陷產生時間常數的預測更快、更有效
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