驗前比 的英文怎麼說
中文拼音 [yànqiánbǐ]
驗前比
英文
pre-test odds-
On the base of these theory calculations, we passivated the front - surface both of different surface doping concentration solar cells by a thin layer of thermally grown sio2. the results show that the in heavy surface doping concentration cell is lower compared to the cell in light surface doping concentration. the majority of improvement in comes from the emitter surface passivation
接著採用sio2作為鈍化膜，從實驗上比較了在不同表面濃度下單晶硅太陽電池的鈍化效果，結果表明在高表面濃度下其開路電壓比低表面濃度下的開路電壓低，這開路電壓的提高主要來源於降低了前表面復合。Being deficient in sonic fatigue testing and owing to the limitations of nomograph method application to the sonic fatigue life prediction, an analysis software program was designed and worked out in present thesis, based on the research achievement in prediction of sonic fatigue life, which strong function, easy use and great extensive capabilities
本文針對現階段聲疲勞試驗的不足，以及工程中常用的諾謨圖方法的局限，整理了目前比較成熟的典型蒙皮壁板聲疲勞壽命研究成果，提出設計並編制了一套功能強、易於使用，可擴展性好的聲疲勞壽命預測及分析平臺。This paper researches and analyses the developments of web technology and magnetostrictive transducers from world wide region. the paper also analyes the characteristics curve of magnetostrictive transducers based on its equivalent circuit and researches the method how to make sure its syntony frequency and its electric simulation network parameters. at the same time, by using jsp technology, a magnetostrictive transducer electric simulation application is designed based on b / s three - tier system structure. the experiment data is fitted by curve fitting module. the equivalent input impedance of it with stimulate loop is separated based on the results of curve fitting and the syntony frequency and electric simulation network parameters of magnetostrictive transducers is determined by the input impedance. the method presented in this paper can determine the syntony frequency and electric simulation network parameters of magnetostrictive transducers with a better accuracy than the testing method of syntony & anti - synton y. further more, jsp, the advanced technology at current, has been used to realize a magnetostrictive transducer web electric simulation system. the system has good human computer interface and the function of resource sharing and information publishing. the research of this paper and its achievements have some practical merits in the researchful and applied fields of magnetostrictive transducer
用java編程語言編寫的曲線擬合模塊，對輸入的實驗數據進行了最小二乘法的曲線擬合；根據曲線擬合結果可從帶激勵線圈的磁致伸縮換能器的輸入阻抗中分離出磁致伸縮換能器鐵芯在無激勵電流時由機械振動形成的等效輸入阻抗，並由此輸入阻抗確定磁致伸縮換能器的諧振頻率及電氣模擬網路參數。本課題提出的方法與傳統的諧振?反諧振法相比，能更準確地確定磁致伸縮換能器的諧振頻率及其電氣網路參數。同時，採用當前比較先進的web技術，實現了基於jsp的磁致伸縮換能器web電氣模擬系統，該系統具有良好的人機界面和資源共享、信息發布功能。The study is implemented in the experimental class and the traditional teaching is carried out in the contrastive class. the experimental content is " morphology and physiology of angiospermae ", which is in the textbook of biology for the secondary normal school, published by people ' s education press
實驗后實驗班學生學習生物興趣水平高的人數比例由實驗前的24 . 5上升到51 . 0 ，而學習興趣水平低的人數比例到由實驗前的34 . 7下降到6 . 1 。The second part is about the testing of students " learning level before developing inquiry learning. the author carries out educational experiment in grade one of senior high school, and tests the real level of the whole grade one of senior high school before experiment, compares the experimental class with the relative class by pedagogical stat and measure, confirms that their learning level is almost equal
第二部分是開展研究性學習前的學生學習水平的測試，在高一年級進行教育實驗，實驗前先對整個高一年級進行摸底考試，將選出的實驗班和對照班利用教育統計測量方法進行比較，確定它們的學習水平沒有顯著差異。A experiment on the water movement rule of the soil had been done before the field experiment, and then four irrigation regimes were placed in it, that is to say, three sub - irrigated areas hi contrast to a general irrigated area
在大田試驗前，做了滲灌土壤水分運動規律試驗，然後，在大田試驗中設置了四個處理，即：三個水平滲灌區和一個漫灌區對照。結果表明： （ 1 ）滲灌區的實際灌水量比漫灌區下降了58 . 15 81 . 63 。Before and after test the samples were studied by the scanning electorn microscope to analyze and make a comparison between the microstructures, to grasp and reveal the mechanism of the gold transportation deposition and enrichment
本項工作選擇了該區的礦化圍巖作三軸高溫高壓試驗，並對試驗前後樣品進行掃描電鏡研究，分析對比微觀組織，研究主要賦金礦物遷移、富集過程，從而了解和揭示金的遷移和富集機制。Firstly, the problem of multiple a priori information fusion has been studied under the condition of the same test environment, such as the consistency test of a priori information, the credibility analysis of a priori information, the calculation of credibility with information likelihood rate, the expression of fusion posterior distribution based on the credibility of multiple a priori information
首先，研究了同種環境下多源驗前信息的融合問題，如驗前信息的相容性檢驗、驗前信息的可信性分析、基於信息似然比的可信度計算、基於多源驗前信息可信度的融合驗後分布表示等。Genetic algorithm is used to optimize the parameters of pid controller that is used to control the plant lon ( local operating network ) is designed to control vav air - conditioning system. by this means the static pressure control and minimum total supply air volume control are experimented. the paper analyzes the coupling among loops, the whole system ' s stability and energy saving effect under the two control methods
針對目前變風量空調系統的模型都是用機理建模方法建立的情況，本論文用最小二乘法對機組部分進行系統辨識，建立了水閥?送風溫度、變頻風機?靜壓兩個迴路的模型，經驗證比較接近實際系統；採用遺傳演算法對pid控制器的參數進行尋優，尋優結果令人滿意；設計了變風量空調系統的lon控制網路，以此為實現手段，進行了定靜壓控制和最小總送風量控制，並在兩種控制方式下，分析了各個迴路的耦合情況、兩種控制方式的穩定性和節能效果。Based on characteristic of silk and cotton fibers, one bath pretreatment with enzyme and hydrogen peroxide, and then reactive dyeing for silk and cotton interwoven fabric were adopted
摘要針對真絲與棉交織物中兩種組分纖維的特點，通過試驗對比，採用生物酶與雙氧水煮漂一浴法進行前處理，再用單活性染料染色。Using data - collecting system developed by ourselves and controlling different parameters, the author monitors the phenomenon of transient boiling and measures the temperature signal. in order to verify the experimental results, numerical simulation of the steady temperature field is carried out before the transient experiment
利用自行開發的數據採集程序系統對瞬態沸騰現象進行監控和溫度信號的測量；並對瞬態試驗前的穩態溫度場進行了數值模擬，通過與穩態試驗數值的比較，來驗證實驗件的溫度場分佈。Appraise the test scheme of dynamic consolidation of each test district before test and make optimization suggestions ; 4. the grain - size distrilidation of the underlayer of dynamic consolidation has great on consumption of the energy i, the better the dynamic consolidation effect is ; 5. the deformation effect of dynamic consolidation foundation is that not only the settlement deformation of foundation will decrease greatly after pounding, but residual settlement deformation in each test district are compared, it can be concluded that the deformation stability of foundation of the runway engineering of pu - dong airport can satisfy the design requirment through dynamic consolidation according to optimized test scheme. but the underlayer of dynamic consolidation should be made when pounding
論文的主要工作和研究認識如下： （ 1 ）確定必要的強夯施工參數； （ 2 ）對既有砂性土又有粘性土地基的最佳夯擊次數的確定方法進行了探討； （ 3 ）對試驗前各試驗小區的強夯試驗方案進行了評價，並提出了優化建議； （ 4 ）強夯墊層材料的級配對夯擊能的消耗有很大影響，級配好的墊層對夯擊能的傳遞比級配差的墊層效果好； （ 5 ）強夯地基的變形效應主要是指夯后地基不但沉降變形會大幅度降低，而且剩餘沉降變形會緩慢地發生； （ 6 ）在比較各試驗小區的變形穩定性后，按照優化后的試驗方案進行強夯處理，則浦東機場場道工程地基的變形穩定性能滿足設計要求，但須在處理時施加強夯墊層。For the detecting and tracking of objects in a static background, we summarize mature detecting algorithms, compare the adjacent frame difference method with the adaptive background difference one and implement an automatic object detecting and tracking system based on adaptive background difference and kalman filtration. as for image feature extraction, we systematically summarize available extraction methods and present the definition of image feature points
靜止背景中目標檢測和跟蹤方面，本文在前人大量工作的基礎上，總結了成熟的靜止背景中目標檢測演算法，試驗對比了瞬時差分法和自適應背景相減法，提出並實現了一個基於自適應背景相減法和卡爾曼濾波的自動目標檢測和跟蹤系統。Because direct torque control requires very high performance of real - time, the popular microcomputer core dsp is used as controller in the design of hardware. its high speed of running is suitable for the experiment. in the main circuit, there is a highly integrated power element : ipm as inverter, which includes seven igbt, has high switch frequency and fault diagnosis function
在本控制系統的具體實現上，由於直接轉矩控制對實時性要求很高，因此在硬體方面，採用了目前比較流行的數字信號處理器（ dsp ）作為系統的控制器，其處理速度高的特點正好符合本實驗的需要：在主電路中，本系統使用了集成度高的功率器件：智能功率模塊（ ipm ） ，作為逆變環節，其集成了七個igbt ，實現了高開關頻率逆變以及故障診斷的功能，從而使控制系統的體積大大縮小、控制更加靈活。Due to the direct torque control requires very high performance of real - time, the popular microcomputer core dsp is used as controller in the design of hardware. its high speed of running is suitable to the experiment. in the main circuit, there is a highly integrated power element : ipm as inverter, which includes seven igbt, has high switch frequency and fault diagnosis function
在本控制系統的具體實現上，由於直接轉矩控制對實時性要求很高，因此在硬體方面，本課題採用了目前比較流行的數字信號處理器（ dsp ）作為本實驗的控制器，其處理速度高的特點正好符合本實驗的需要；在主電路中，本系統使用了集成度高的功率器件：智能功率模塊（ ipm ） ，作為逆變環節，其集成了七個igbt ，實現了高開關頻率逆變以及故障診斷的功能，從而使控制系統的體積大大縮小、控制更加靈活。Thirdly, it contains detailed descriptions of the experiment and data analysis, which includes three parts : 1 ) vocabulary test comparison for the experimental class and the control class ; 2 ) comparison of investigation into schematic association before and after the experiment for the two classes ; 3 ) comparison of high and low score students with their investigation scores before and after the experiment
數據分析和討論共分三個層次： 1 ）實驗班與控制班詞匯前測與詞匯后測成績對比； 2 ）實驗前後兩個班對詞匯進行圖式聯想記憶的調查成績對比； 3 ）實驗后高成績與低成績學生和他們的圖式詞匯聯想記憶調查成績對比。Part six reports the conclusion : 1 ) compared with classroom rote repetition, the classroom schematic word presentation is significantly different in textbook new word retention, extra new word increase and old word consolidation ; 2 ) the difference of the post investigation on schematic association for the experimental class is reported much greater than for the control class ; 3 ) the more schematic the subjects associate words, the higher they score in post word test. part seven is the implications and limitations of this study. also some suggestions for further study is given
基於以上分析與討論，本文得出以下結論： 1 ）教師課堂口授圖式聯想詞匯方式與課堂進行詞匯表背誦方式相比，圖式詞匯聯想方式在課本新詞匯學習方面、課外詞匯擴大方面和舊詞鞏固方面，都比詞匯表背誦學習具有顯著差異，尤其在舊詞鞏固方面差異更顯著； 2 ）控制班在實驗前後的圖式詞匯聯想調查成績無顯著差異，實驗班在實驗前後的圖式詞匯聯想調查成績差異顯著，表明圖式詞匯聯想教學能提高詞匯測試成績； 3 ）實驗后，圖式詞匯聯想調查成績越高的學生，詞匯測試成績也越高This flexion of graph can be defined as criterion of coal ignition character under excessive oxygen supply. based on viewpoints of coal ignition, we put forward assumption aiming at ignition character of coal with excessive oxygen. in this thesis, with comparison of average temperature increase among eleven kinds of coal, the following are obtained : homogeneous ignition happens when coal has higher volatile matter and there is a approximative direct - ratio relationship between temperature hoist before flexion and content of volatile matter ; on the other side, heterogeneous ignition occurs for the coal with lower volatile matter content because of collective influence of volatile matter and fixed carbon combustion, and one - to - one relationship between temperature increase before flexion and content of volatile matter does not exit
以煤著火性質研究的觀點為基礎，對煤在過氧條件下的著火性質提出假設，通過11種標準煤樣在過氧條件下燃燒實驗，對比了拐點前後平均溫升與煤樣成分的關系，證實了揮發分含量較高的煤在過氧條件下發生均相著火燃燒，拐點前後量熱系統的溫升分別與揮發分和固定炭的含量成近似正比的關系；而揮發分含量較低的煤在過氧條件下發生非均相著火燃燒，拐點之前量熱系統的溫升由於受到揮發分和固定炭同時燃燒的影響，因而不存在溫升與揮發分含量之間單一的對應關系。The analysis of i - v characteristic and microstructure shows that the failure of device results from the gate sinking and ohmic contact degradation
通過溫度斜坡試驗，對器件試驗前後的i - v特性的對比分析和微結構的分析表明，歐姆接觸退化和柵下沉共同導致了器件的失效。According to the questionnaire data, the results are analyzed by spss 5. 0 software
6上升到44 9 ，能動性水平高的人數比例由實驗前的20分享友人