水流狀態 的英文怎麼說
中文拼音 [shuǐliúzhuàngtài]
水流狀態
英文
flow regime- 水 : 名詞1 (由兩個氫原子和一個氧原子結合而成的液體) water 2 (河流) river 3 (指江、河、湖、海、洋...
- 流 : Ⅰ動1 (液體移動; 流動) flow 2 (移動不定) drift; move; wander 3 (流傳; 傳播) spread 4 (向壞...
- 狀 : Ⅰ名詞1 (形狀) form; shape 2 (情況) state; condition; situation; circumstances 3 (陳述事件或...
- 態 : 名詞1. (形狀; 狀態) form; condition; appearance 2. [物理學] (物質結構的狀態或階段) state 3. [語言學] (一種語法范疇) voice
- 水流 : 1. (江河) rivers; streams; waters2. (流動的水) current; water flow; fluent; flow; [水文] stream current
- 狀態 : status; state; condition; state of affairs: (病的)危險狀態 critical condition; 戰爭狀態 state o...
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In this dissertation, through computer simulation, the problems of modeling, control and guidance of auvs are presented. the first part of this dissertation addresses the problem of dynamically modeling of auvs, and derives thrusters " two - dimension nonlinear dynamic model, which has axial flow speed and propeller rotational velocity as two state variables, voltage or current of motor as inputs, and thruster force and torque as output. the second part focuses on the nonlinear adaptive sliding mode control of auvs in diving plane and steering plane
本論文系統研究了自主式水下航行器的建模、非線性自適應滑模控制、以及深度調整和水平面導引方法等問題,具體成果和創新點如下1 、根據流體力學理論,建立了螺旋槳推進器的動態模型,它以螺旋槳來流速度v _ p和螺旋槳轉速n為狀態變量,以電機施加轉矩為輸入,螺旋槳推力t和轉矩q為輸出。The two - point to earth short fault may cause short currents whic h can lead to serious accident. so it is necessary to monitor the state of field windings of turbo - generator and detect the kind of fault and predict its inclination. thus the security level of power system will be improved
由於發電機轉子兩點接地故障時會產生較大的短路電流,導致惡性事故的發生,因此對發電機轉子繞組進行狀態監測,判斷短路故障的形式和趨勢是十分必要,有助於提高系統安全運行水平。The researches indicated : ( 1 ) the seepage flow field of infiltration diversion is characterized by three - dimensional, saturated and steady flow. there is the close hydraulic relationship between the river and the groundwater in the filtering bed, and the groundwater is confined
研究表明: ( 1 )滲濾取水的滲流場具有典型的飽和三維穩定流特徵;滲濾取水濾床中地下水與河流的水力聯系比較緊密,濾床中的地下水處于承壓狀態。Through the special studies on impacts to atomizing and humidifying effect from such factors as the firing pin type, centrifugal structure, higher spraying pressure, less aperture, initial water temperature and original state of the air, some conclusions are obtained, such as : the centrifugal nozzle with firing pin type, high pressure and little aperture has bigger air eddy and atomizing angle. the spaying liquid has high velocity. the droplet is small, and the heat and mass transfer velocity is high
通過對撞針型結構、離心式結構、較高的噴水壓力、較小的噴嘴孔徑、噴水初溫及待加濕空氣初狀態對霧化加濕效果的作用原理的重點分析,得到:撞針型高壓小孔徑離心式噴嘴具有較大的空氣渦與霧化角,噴出的液體流速高、液滴小、水與空氣傳熱傳質速率高,撞針型結構提高了霧化加濕效率,高壓小孔徑的特點為霧化加濕提供了較大的能量,而噴水初溫的升高會減小水的粘性力和表面張力,從而優化加濕效果。The forecast of moving distance of avalanche soils - the ratio of the heights of collapsed part and run - out of avalanche soils is related to slope shapes, avalanche sources, streamwise soil conditions, runoff on foreside, and soil moisture
主要內容如下: ?崩塌土運動距離的預測?崩塌土流高比與斜坡形狀、崩塌源土質及沿程土質條件、坡前徑流及土層含水狀態等有關,並提出了崩塌土流高比公式。In order to solve this problem, we find a kind of herbages plant - sabaigrass ( eulaliopsis binata ) which not only can accommodate the badly environment of purple soil but also have excellent water and soil conservation effect and good economic benefit. this study adopt quantitative and qualitative methods, through comparative study of four different utilization types : sabaigrass treatment, grass tree solid plating treatment ( planting sabaigrass under fruit trees treatment ), bare land treatment, natural wild grassland treatment, study water and soil conservation effect, soil water condition, soil constructors condition, soil fertility condition and soil surface temperature, then evaluated the water and soil conservation effect of plating sabaigrass in purple soil bare sloping field and probed into water and soil conservation mechanism. the main results are as follows : 1
本研究針對湖南省衡邵盆地紫色巖地區日益惡劣的生態環境,從紫色土荒坡地水土流失治理入手,在尋求出既適應紫色土荒坡地惡劣環境又有良好水土保持作用和一定經濟效應的作物? ?龍須草的基礎上,用定性和定量相結合的方法,以「龍須草純種」 、 「龍須草與果樹立體種植」 (簡稱林草立體種植,下同) 、 「空曠地」 、 「自然野生雜草地」四種不同的土地利用方式進行對比研究,從水土保持效應、土壤水文狀況、土壤結構、土壤肥力狀況、地表溫度狀況等方面分析、評價紫色土荒坡地種植龍須草防治水土流失的效應,並對其機理進行了初步探討,主要研究結果如下: 1Therefore, it is the urgent need of land exploiture and environment repair that how to investigate the current situation of soil losses accurately, quickly and dynamically, how to predict & inspect soil losses, and provide scientific base for the repair of soil erosion and implement of soil and water conservation planning. otherwise, the survey method of soil losses is lagger in yunnan
如何準確、快速、動態地查清水土流失現狀,進行水土流失預報和動態監測,為水土流失治理和水保規劃實施提供科學依據,是土地開發與環境整治的迫切需要,而雲南省在水土流失調查方法方面恰恰處于相對落後狀態。Firstly, the status of our nation ' s water resources, flood and arid hazards is overviewed to illustrate the necessity for study on dynamic control of flood season limited water level. disadvantages in traditional limitsd water level design, static control of limited water level design, static control of limited water level and fuzzy limited water level curve are pointed out, and mending methods for these are introduced. dynamic control and its key problems are analyzed hi next section. the allowable range of limited water level is determined, so as the allowable extreme risk index. the definition of extreme risk is re - illustrated, risk analysis methods in reservoir operation is discussed either. according to the definition of extreme risk rate, the allowable extreme risk rate of reservoir is systematically demonstrated with variant extreme risk indexes and flood season limited water level
本文首先闡述了我國水資源狀況和水旱災害、說明水庫汛期限制水位動態控制研究的必要性;介紹了傳統汛限水位設計、汛限水位靜態控制、模糊汛限水位過程線存在的問題及其初步改進方法;分析汛期限制水位動態控制的方法及關鍵問題;進一步闡述了水庫極限風險率的定義;根據極限風險率定義,詳細敘述了不同極限風險指標時、不同汛期限制水位下起調,水庫所能承受的極限風險率計算方法。然後,基於極限風險率計算方法,以白石水庫為背景,研究「考慮壩體自身安全、考慮壩體安全與下游防護對象控制下泄流量的汛限水位動態控制的極限風險率」 。The lipoid in the fishes brain had been viscid when the temperature at 17. and become more solid with the temprature went dowra unceasingly
從解剖中看到,當溫度下降到17時,淡水白娼的腦腔內脂類呈半流動狀態,隨著溫度的下降滯流現象更為嚴重。The hyperbolic conservation laws with relaxation appear in many physical systems such as nonequilibrium gas dynamics, flood flow with friction, magnetohydrodynamics, etc. firstly, the thesis proves that there exists a unique global smooth solution for the cauthy problem to the hyperbolic conservation laws system with relaxation ; secondly, in the large time station, the thesis proves that the global smooth solutions of the hyperbolic conservation laws system with relaxation converge to rarefaction waves solution at a determined l ( p > 2 ) decay rate
帶鬆弛項的雙曲型守恆律組出現在諸多的物理系統中。例如,非平衡態的氣體動力學、帶摩擦的水流、磁動力學等。本文首先證明,帶鬆弛項的雙曲型守恆律組的柯西問題的整體光滑解的存在唯一性;其二,證明了帶鬆弛項的雙曲型守恆律組的解與相應的平衡態守恆律的稀疏波解在大時間狀態下的l ~ p衰減率。According to the hydraulic property of overflow weirs under steady flow, the flow patterns of overflow weirs were classified into free overfall and submerged overfall, and numerical models for unsteady flow were established to simulate the two flow patterns respectively
摘要為了對保水堰的交替水流進行數值模擬,依據保水堰恆定流情況下的工作特性,將保水堰的水流形態分成堰流和滿流兩種狀態,分別建立保水堰不同流態下的非恆定流數學模型。The hydraulic gradients of settling slurry flow transported in three kinds of moving states, i. e. suspension, saltation, or partially suspension were investigated, based on analyzing the changes of solid particles and water in momentum, velocity and their mass related to momentum exchanging over the acceleration period of the solid particles
從固體顆粒加速期間清水與固體顆粒的速度變化、動量傳遞、相關質量等基本問題分析入手,研究了沉降性漿體在水平管道內流動時其固體顆粒在3種流動狀態下的水力坡度,提出了沉降性漿體在水平管道內流動的機理模型,進而用該模型對一些輸送條件下的沉降性漿體的水力坡度進行了計算。When soil antecedent condition is dry and the initial rainfall intensity is high, peak surface runoff also considerably lag behind that of rainfall, because of the formation of temporary relative impermeable top layer ; b ) surface runoff is controlled primarily by infiltration - excess runoff mechanism under unsaturated condition ; the major fraction of surface runoff are dominated by saturated infiltration - excess runoff response, only a small fraction by return flow mechanism when soil is saturated ; c ) subsurface flow is dominated by saturated runoff mechanism, and the duration of subsurface post the rainfall end is dependent upon rather the soil properties than the rainfall characteristics ; d ) subsurface flow intensity in cultivated soil layer ( 0 ~ 20cm ) is high up to 35mm / h when rainfall intensity is up to 120mm / h, indicating the existing of macropores and pipe flow in cultivated layer
2 )耕作制下紫色土的產流主要機制是: 1 )當雨前土壤含水量未達到飽和狀態時,表面產流起始時間有明顯滯后現象,這與紫色土的快吸水性和較多非毛管孔隙密切相關;當雨前土壤較乾燥,降雨初期雨強較大時,易形成臨時相對不透水表層,表面產流峰也有明顯滯后現象。 2 )表面徑流的產流方式主要是超滲產流,當土壤達到飽和狀態后,有四川大學博士學位論文小部分回歸流發生,但主要是飽和超滲產流發生,因為紫色土的相對不透水層和其它透水障礙層不明顯。 3 )壤中流主要是飽和產流,與降雨過程有明顯的滯后,而且雨停后的壤中流產流歷時與降雨特徵無關。The three - dimensional primitive equations were derived for ocean in the condition of turbulence, by using the reynods time average method
首先在流體動力學和熱動力學的基礎上,應用雷諾時均方程法,詳細推導得到海水在湍流狀態下的三維原始方程。In the turbulent flow, the fluid ’ s physical parameters has the stochastic change along with the time and the space, it is very difficult to carries on its rate process ’ s precise computation and the simulation with mathematics method, but unstable condition navier - stokes equation regarding open canal current of water transient motion suitable
閘后水流經過加糙的海漫段時,其水流狀態屬明渠紊流。流體中的各種物理參數,都隨時間與空間發生隨機的變化,很難用數學的方法對其運動過程進行精確計算和模擬。This paper discussed the modality of ringed piping in the procedure of fire fighting
討論了消防過程中環狀管網中的水流狀態。According to the hourly water demand forecasting results of hangzhou city, the reasonability and effectiveness of this model was proved. real large water supply system is a complicatedly dynamic nonlinear system, it is influenced by many factors, and these factors are interactional. it is difficult to simulate water distribution networks by using one or several explicit functions
由於實際大型供水系統是非常復雜的動態非線性系統,在實際管網的運行中,受到多因素的制約和影響,各綜合因素作用疊加起來造成水流狀態極其復雜,使得很難以一個或幾個統一的顯式函數關系描述管網的工況。The result shows that the heat transfer coefficient within the hollow fiber module with laminar flow can be calculated based on the correlation. by analyzing the equation, it was founded that the heat transfer coefficient under laminar flow is almost independent of the feed flow rate. numerical simulation of temperature distribution in hollow fiber membrane module with laminar flow was carried out
首先採用純水為研究體系,研究分析了中空纖維管內的傳熱系數,研究表明,纖維管內的流動屬于層流狀態,其邊界層傳熱系數可用關聯式來計算,由此式看出,層流狀態下,流速對傳熱系數的影響很小。As the pressure on diaphragm ( 8 ) approaches a balance with the force exerted by adjusting spring ( 5 ), disc ( 20 ) is throttled to a position where just enough water flows to maintain the set delivery pressure
當隔膜( 8 )上的壓力接近等於調節彈簧( 5 )的彈簧力時,閥瓣( 20 )就進行節流狀態,使得剛好有足夠的水流來保持設置的輸出壓力。The thesis also introduces the virtual instrument ’ s concept, system architecture, etc. the development of virtual instrument ’ s application software is discussed in detail. it includes virtual instrument software architecture ( visa ), and virtual instrument ’ s software platforms. the thesis discusses the principle and mechanism of work of the simulation of embedded system. by comparing with the principle of traditional logical analyzer, it draw a conclusion that the virtual logical analyzer will work in synchronous way when it is used for both logical state analyzer and logical time analyzer. the thesis
論文接著探討了嵌入式模擬平臺的原理和工作機制,通過與傳統邏輯分析儀原理的比較,得出了嵌入式模擬平臺下邏輯分析儀無論是做定時分析,還是做狀態分析都工作在同步方式下;並重點剖析了探頭原理,采樣定理和毛刺,數據的建立和保持時間等邏輯分析儀的重要技術指標,得出了虛擬環境對虛擬邏輯分析儀的功能和各項技術指標的影響,還提出了流水線狀態表的思想和實現機制。分享友人