時間微分 的英文怎麼說

中文拼音 [shíjiānwéifēn]
時間微分 英文
time differential
  • 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...
  • 分 : 分Ⅰ名詞1. （成分） component 2. （職責和權利的限度） what is within one's duty or rights Ⅱ同 「份」Ⅲ動詞[書面語] （料想） judge
  • 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...
  1. The new system consists of a single - chip computer system ( at89c51 + psd311 ) and alow power consumed analyzer by applying a new adc chip ads774, and a dead - time correcting circuit is designed to correct the collecting time

    本系統由單片微機系統（ at89c51 + psd311 ）組成多道緩存，由低功耗模數轉換器組成分析器，與微型計算機通過列印并行介面實現數據通訊，並含有死時間校正電路。
  2. In the course, the condition and the process of forming and changing of minerals, the typomorphic features of minerals, the characteristics of the distribution and the evolution of minerals and their paragenetic associations in the period and the space, the methods of mineral analyses and research, the geological thermometers and the geologicial barometers of minerals, mineral paragenetic associations and paragenesis analyses will be introduced, and the magnificent and the microscopic genetic characteristics of pyrite, quartz, garnet, pyroxene, amphibole, mica, feldspar, and other minerals will be dealt with particularly

    本課程主要講述礦物及其共生組合的形成和變化的條件和過程，不同物理化學條件下礦物的成分、結構、形態、物性等標型特徵以及它們之間的內在聯系，礦物及其共生組合在時間上和空間上的分佈和演化規律，礦物成分、結構、形貌、物性等的分析測試方法，礦物地質溫度計和地質壓力計對其形成環境的表徵，不同體系（封閉體系、開放體系）條件下，礦物的穩定范圍和彼此替代順序的共生分析，重點介紹黃鐵礦、石英、石榴石、輝石、角閃石、雲母、長石等礦物（族）在成因上的宏觀標志和微觀信息，以及其成因信息在成巖作用和成礦作用中的地質意義。
  3. The work on the calculus during the first two thirds of the century lost itself in details.

    這世紀的前三分之二的時間內，微積分的工作沉沒在細節里。
  4. The origin and evolution of land plants was an important event in the history of earth life and has affected all other lives on the earth and global environment. during the past two decade, the new discoveries of fossil plants microfossils and megafossils from the mid - ordovician through all silurian to the lower devonian improved knowledge of the origin of land plants, provided a time framework of the basal groups for the land plants and the early evolution diversity of vascular plants. three new plant based epochs have been recognized. on the other hand, molecular sequence studies have provided insights into the phylogeny and early branches of land plants. a phylogenetic tree has been established by the joint of a study of comparative morphology and gene sequences. this paper summarizes recent advances and new knowledges, comments on the phylogenetic studies based on the cladistic analysis

    陸生植物的起源和演化是地球生命中的重大事件，它影響到地球上所有的其他生命和全球環境。在過去的20年中，從中奧陶世歷經整個志留紀至早泥盆世的巖層中，化石植物微化石和大化石的新發現改變了人們對陸生植物起源的認識，並且為陸生植物和維管植物早期演化分異提供了基部類群分化的時間框架。據此人們識別出地史中的3個陸生植物的時代：始胚植物時代始維管植物時代和真維管植物時代。
  5. Constructing quantitative model with ordinary differential equations for the cell - cycle control system, it is appropriate to use ordinary differential equations ( odes ), because molecular diffusion, transcription, translation and membrane transport seem to be fast ( a matter of seconds ) compared with the duration of the cell cycle ( hours ). spatial localization of reactions can be handled by compart - mental modelling, in the spirit of pharmacokinetics

    對于這樣的細胞周期控制系統，應用常微分方程是適合的，因為比起細胞周期的時間（以小時計）來，分子擴散，轉錄，翻譯和膜運輸是很快的（以秒計應用藥物動力學的區域化模型的方法，可以處理反應的空間分佈。
  6. Based on the analyses on mechanical properties, microstructure and fracture of - the microalloyed steels socrv with various heat treatment technique, it can be affirmed that various fractures arttribute to various mechanism, we can draw conclusion that the strength and toughness of microalloyed steels 50crv will be increase simultaneously by optimal heat treatment technique. to illustrate the mechanism of the strength and toughness of microalloyed steels socrv, we designed the comparative experiment and observed the microstructure of the sample which occurred at different quench and tempering temperature and different tempering time. the last experiment results were determined by the four factors : fined microalloyed elements grains, the decompound of martensite, martensite transformation of remnant austenite and the second phase precipitation

    為解釋微合金化50crv鋼強韌化機理，本文通過對不同淬火溫度，回火溫度，回火時間下的力學性能指標的對比及顯微分析，認為微合金元素的細化晶粒，馬氏體的回火分解，殘余奧氏體的轉變，第二相的沉澱析出共同決定了微合金鋼的強韌化情況，特別是由於微合金元素的存在，其細化晶粒及其碳氮化物的沉澱析出，導致鋼的良好的強韌性，並且如果工藝滿足第二相的沉澱析出強化大於回火馬氏體分解引起的軟化效應，會在硬度曲線中產生明顯的二次硬化現象。
  7. Purpose : to explore the risk factors for nosocomial infection of urological surgical department. method : 2 976 cases of urological surgical patients was investigated retrospectively for the nosocomial infective prevalence in urological surgical department from the april 1996 to april 1999. result : nosocomial ratio in urological surgical department was 4. 87 %, in which 73. 1 % for male and 26. 9 % for female. the infective sites are lower respiratory tract, surgical wound, urinary tract, gastrointestinal tract, upper respiratory tract and skin - soft tissues in turn, infection rates were 4. 38 %, 10. 4 %, 13. 6 %, 27. 6 %, 25. 5 %, 30. 3 %, 20. 8 %, 42. 6 % for clean wound, dirty wound, infection wound, artery catheter, venouse catheter, urinary tract catheter, respiratory tract, and general anesthesia respectively. conclusion : the nosocomial infection was not related to age, infection time and the usage of antibiotics ; but was closely related to gender, surgical sites, surgical wound type, invasive operation, the degree of tisk index and micropathogens

    目的:探討泌尿外科醫院感染的危險因素.方法:回顧性調查1996年4月1999年4月間我院泌尿外科手術患者2976例的醫院感染情況.結果:泌尿外科醫院感染率為4 . 87 % ，其中男性佔73 . 1 % ，女性佔26 . 9 % ;感染部位依次為下呼吸道、手術傷口、泌尿道、胃腸道、上呼吸道、皮膚軟組織;類切口術后感染率為4 . 4 % ，類切口術后感染率為10 . 4 % ，類切口術后感染率為13 . 6 % ;動脈插管感染率為27 . 6 % ，靜脈插管感染率為25 . 5 % ，泌尿道插管感染率為30 . 3 % ，呼吸道感染率為20 . 8 % ，全麻感染率為42 . 6 % .結論:醫院感染與患者年齡、感染時間和抗菌藥物使用情況無關，與性別、部位分佈、手術切口類型、侵入性操作、危險指數等級及病原微生物有密切關系
  8. Abstract : purpose : to explore the risk factors for nosocomial infection of urological surgical department. method : 2 976 cases of urological surgical patients was investigated retrospectively for the nosocomial infective prevalence in urological surgical department from the april 1996 to april 1999. result : nosocomial ratio in urological surgical department was 4. 87 %, in which 73. 1 % for male and 26. 9 % for female. the infective sites are lower respiratory tract, surgical wound, urinary tract, gastrointestinal tract, upper respiratory tract and skin - soft tissues in turn, infection rates were 4. 38 %, 10. 4 %, 13. 6 %, 27. 6 %, 25. 5 %, 30. 3 %, 20. 8 %, 42. 6 % for clean wound, dirty wound, infection wound, artery catheter, venouse catheter, urinary tract catheter, respiratory tract, and general anesthesia respectively. conclusion : the nosocomial infection was not related to age, infection time and the usage of antibiotics ; but was closely related to gender, surgical sites, surgical wound type, invasive operation, the degree of tisk index and micropathogens

    文摘:目的:探討泌尿外科醫院感染的危險因素.方法:回顧性調查1996年4月1999年4月間我院泌尿外科手術患者2976例的醫院感染情況.結果:泌尿外科醫院感染率為4 . 87 % ，其中男性佔73 . 1 % ，女性佔26 . 9 % ;感染部位依次為下呼吸道、手術傷口、泌尿道、胃腸道、上呼吸道、皮膚軟組織;類切口術后感染率為4 . 4 % ，類切口術后感染率為10 . 4 % ，類切口術后感染率為13 . 6 % ;動脈插管感染率為27 . 6 % ，靜脈插管感染率為25 . 5 % ，泌尿道插管感染率為30 . 3 % ，呼吸道感染率為20 . 8 % ，全麻感染率為42 . 6 % .結論:醫院感染與患者年齡、感染時間和抗菌藥物使用情況無關，與性別、部位分佈、手術切口類型、侵入性操作、危險指數等級及病原微生物有密切關系
  9. In this paper, the flow pattern defects ( fpds ) were revealed by secco etchant and their shape, distribution on wafer and tip structure were studied in details by optical microscope and atomic force microscope ( afm ). the relationship between etching time and the tip structure of fpds was also discussed. furthermore, by studying the effect of rapid thermal annealing ( rta ) on the density of fpds in ar, the annihilation mechanism of fpds was discussed in this paper

    本文將cz硅單晶片在secco腐蝕液中擇優腐蝕后，用光學顯微鏡和原子力顯微鏡對流動圖形缺陷（ flowpatterndefects ， fpds ）在矽片中的形態、分佈及其端部的微觀結構進行了仔細地觀察和研究，並討論了腐蝕時間對fpds缺陷端部結構的影響；本文還通過研究ar氣氛下快速退火（ rapidthermalannealing ， rta ）對fpds缺陷密度的影響，初步探討了fpds的消除機理。
  10. The second passage of the article is the essential section, composed with macrocosm design, organization implement and feedback collection, designing and outlining the systemic model of certificate of leadership qualification, the whole assessment system pays attention not only to the macrocosm structure, proper and scientific frame, extensive applicability, but also to concrete steps, exiguous and intuitionistic programming, simple and convenient operation. the macrocosm design exerts modern examination theory and systemic project method to describe thoroughly the basic principles, applicable range, certificate categories, the setting of organization system, assessment target of leadership qualification, the choice of content and technology ; organization implement gives exiguous and concrete designs on the period of qualification examination, choosing time, confirmation of the certificate scale and qualification censor, written examination, interview, pub

    總體設計中運用現代考試理論和系統工程的方法，適應形勢，結合實際，對認證制的基本原則、適用范圍（正副廳、正副處、正副科等三等六級） 、認證的分類、組織體系的設置、任職資格認證評價目標、內容和技術的選擇進行了宏觀全面地闡述;組織實施中對任職資格考試周期、時間的選擇、認證規模的確定以及資格審查、筆試、面試、考察、公示的操作等進行了微觀具體地設計;反饋迴流中對認證工作的檢驗和評估、任職資格的跟蹤動態管理和認證制保障機制的建立進行了詳細說明。
  11. In part two, the optical spatiotemporal pattern in ring optic cavity is investigated. using delay feedback with spatial perturbation method, the system shows roll, square, hexagon, homocentric circle, " honeycomb " and " snowflower " pattern with different spatial perturbation functions. different patterns can be coexist and compete each other with the same perturbation function, which is the new character of this optical system with delay feedback

    第二部分，利用延時反饋的空間微擾方法研究了環形腔中二能級介質的光學時空斑圖的控制，在不同的微擾函數作用下，出現了滾筒狀、四方形、六角形、蜂窩狀、同心圓以及「雪花」狀等不同的斑圖，並且在相同的微擾函數下張勝海:博士學位論文出現了不同斑圖之間的競爭，這種競爭是我們發現的這一具有空間微擾的延時反饋非線性光學系統光學斑圖的新特徵。
  12. With observing the topography of different time period by afm, the formation mechanism of five stages of ots molecular film was concluded. 4. tribological characteristics of ots self - assembled molecular film were studied by lfm. the effects of sliding velocity and load on frictional force were analyzed

    在研究過程中，通過原子力顯微鏡（ afm ）觀察不同成膜時間及不同溶劑組成條件下的ots自組裝分子膜的形貌，由此來判斷反應進程，總結出ots自組裝分子膜生長模式的五個階段。
  13. Bias voltage, which are related to the superlattice structural paraments, the doped densities and the applied bias voltage. we have also investigated the characteristics of superlattice under hydrostatic pressure by simulations

    超晶格的負微分電導區還導致出現固定偏壓下隨時間變化的電流自維持振蕩，振蕩產生的條件依賴于其結構參數，摻雜濃度和外加偏壓的大小。
  14. Ill 6. regularity of concrete petrography changing with temperature, standing time, cooling and curing process was studied by x - ray diffraction analysis. microscopic mechanics relative to macroscopic phenomenon after fire was discussed

    利用x -射線衍射分析試驗研究了火災高溫后混凝土的巖相隨受火溫度、靜置時間、冷卻及養護方式的變化規律，探討了火災后混凝土產生宏觀現象的微觀機理。
  15. "oh! not so long, " smiled the precocious lad, with a superior and patronizing air, "only nine minutes. "

    「啊，時間不很長，」這個老成的小夥子微笑著說，帶著一副行家的好為人師的態度：「只需九分鐘。」
  16. By analyzing the microstructure of as - cast alloys with different surplus of samarium added, the optimum surplus of samarium is decided. by comparing the microstructure of the alloys annealed for different time, the ideal and economical annealing time is confirmed. the microstructure and phase composition of alloys during the whole preparation of sm2fe17nx are analyzed using the scanning electron micrograph with energy - dispersive x - ray analysis and x - ray diffraction patterns

    本論文首先就熔煉工藝參數對鑄態組織微結構的影響進行了探討，並制定出一套較為合適的熔煉工藝；通過對不同釤加入量的鑄態組織微觀結構的觀察分析，確定了原料配置過程中釤的最佳補償量；通過對採用不同退火時間的合金組織進行比較，確定了理想、經濟的退火時間；同時還利用掃描電子顯微圖像和x射線衍射圖譜，比較了整個制備過程中，試樣微結構和相組成的變化情況。
  17. The dependence of oxygen precipitation and induced - defects in heavily as - doped silicon on heat treatment process was studied by annealing and ig process, chemical etching, scanning electron micrograph ( sem ) and transmission electron microscopy ( tem ). a developed ig technique was suggested and the mechanism of the influence of as on oxygen precipitation formation in heavily as - doped silicon was discussed

    本文通過化學腐蝕、光學顯微鏡、掃描電鏡（ sem ） 、透射電境（ tem ）等分析技術，對重摻砷硅單晶在單步退火工藝和內吸雜退火工藝中氧沉澱及誘生缺陷的形態，形核與熱處理溫度、時間的關系等進行了研究。
  18. The above spatial and temporal discretization in the boundary, and two - directional average in the intersection, can satisfy completely n - s equations, and have high accuracy in the all computational regions

    對邊界上的空間微分採用高階緊致差分格式離散，時間微分採用四階時間推進處理，在交界處採用雙向差分平均法，保證了整個計算域上的流動都滿足navier - stokes方程，並具有高階精度。
  19. The main numerical method of this code is coming from scheme ( jameson, schimit and turkel ) : using cell - centered finite volume method as spatial discretization tools, and a system of ordinary differential equations for time variable is obtained, which is solved by utilizing five - step runge - kutta scheme as time marching method, introducing artificial dissipation to damp high frequency oscillations near the shock and stagnation point

    本論文採用歐拉方程作為控制方程，利用中心有限體積法進行空間離散，得到對時間變量的常微分方程組，採用龍格庫塔多步法進行時間積分，加入人工粘性以消除激波和駐點附近的壓力振蕩等方法來對naca0012翼型的實際流動進行并行數值模擬。
  20. As the time microscale factor in fast transient high - strength heating or cooling can not been ignored, heat relaxation time is introduced. based on hyperbolic heat conduction equation and kinetic equation added inertia, theoretical analysis and study of stress diffusion and transformation in heat impact process were developed

    考慮到快速高強度加熱或冷卻帶來的時間微尺度因素，引進熱鬆弛時間，以雙曲線型熱傳導方程和考慮慣性力的運動方程為基礎，對熱沖擊過程的應力傳播與變化規律進行了理論上的分析和研究。
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