fluid shear 中文意思是什麼
fluid shear
解釋
流體切變-
The expression ratios reported are the average from the two separate experiments. ( 1 ) huvecs exposed to fluid shear stress ( 4. 20 dyne / cm2 ) for 1 h, 2 h, 3 h, 4 h, 5 h, 6 h, 7 h, 8 h, 9 h, 10 h, or 12 h, respectively
735x10 』拷貝，與3h時的表達量處在同一個數量級；在7dh之間h七inrna的表達量相對穩定，但和4 ? 6h之間n -
( 4 ) huvecs exposed to low fluid shear stress ( 4. 20 dyne / cm " ) for 2 h and incubated by 17 p - estradiol ( 10 - 7 m ) + low shear stress ( 4. 20 dyne / cm2, 2 h ). normal static cultured huvecs were selected as a control
929x10 』拷貝之間，和44h之間neinrna的表達量相比又下降了一個數量級；未用切應力處理的內皮細胞沒有il七基因的表達，基線值分別為8 -
Objective to investigate the effects of fluid shear stress on il - 8 gene in human umbilical vein endothelial cells ( huvecs ) and the roles of time course of low shear stress and intensity of fluid shear stress using lightcycler ? system ; to investigate the gene expression profiles in huvecs exposed on low shear stress ( 4. 20 dyne / cm2, 2 h ) and incubated by 17 p - estradiol ( 10 - 7 m ) + low shear stress ( 4. 20 dyne / cm2, 2 h ) using the cdna microarray approach. methods endothelial cells were isolated from human umbilical cord veins by collagenase treatment as described by jaffe and modified
目的探討人臍靜脈內皮細胞（ humanumbilicalveinendothelialcells ， huvecs ）在流體切應力作用下il - 8基因的誘導表達以及切應力的作用時間和作用強度對il - 8基因表達影響的變化規律；利用表達譜基因晶元技術研究內皮細胞在低切應力（ 4 . 20dyne cm ~ 2 ， 2h ）作用下其切應力相關基因的表達情況以及生理濃度（ 10 ~ （ - 7 ）的17 -雌二醇孵育內皮細胞48h ，再經同樣條件的切應力處理后對內皮細胞切應力相關基因表達的可能影響。 -
Many planets ( for example, ganymede, mercury, the earth, jupiter and saturn ) and stars ( for example, the sun ) possess intrinsic magnetic fields. the explanation for their existence and variation remains a great challenge to planetary scientists and astrophysicists. this article attempts to review some recent developments and difficulties in the study of magnetohydrodynamics for the electrically conducting fluid interiors of planets and stars. it is the fluid motions, usually driven by thermal convection, that generate and sustain magnetic fields through magnetohydrodynamic processes in planets and stars. in planets, the magnetohydrodynamic processes are strongly affected by the combined and inseparable effects of rotation, magnetic fields and spherical geometry. the key dynamics involves the interaction between the coriolis and lorentz forces. in the sun, it is the solar tachocline, a thin shear flow layer located at the base of the convection envelope, that plays an essential role in the solar magnetohydrodynamic processes which produce the 11 - year sunspot cycle. some results of a new nonlinear three - dimensional solar dynamo model are also presented
許多行星（如木衛三，水星，地球，木星和土星）和恆星（如太陽）具有內部磁場.對這些磁場的存在和變化的解釋對行星科學家和天體物理學家是一個巨大的挑戰.本文試圖總結行星和恆星的導電流體內部磁流體力學研究的新近發展和困難.一般由熱對流驅動的流動通過磁流體力學過程產生並維持在行星和恆星中的磁場.在行星中磁流體力學過程強烈地受到轉動，磁場和球幾何位型的綜合影響.其動力學的關鍵方面涉及科里奧利力和洛倫茲力間的相互作用.在太陽中其流線，即處于對流層的薄的剪切流層在太陽的磁流體力學過程中扮演了一個基本的角色，並由之產生了11年的太陽黑子周期.本文也給出了一個新的非線性三維太陽發電機模型 -
The results showed that the soy protein dough was a typical pseudoplastic fluid in the normal processing ranges, and the apparent viscosity decreased with the increase of shear rate and moisture content, and also decreased with the increase of temperature below 120, and increased with the reduction of temperature above 120
實驗結果表明：大豆蛋白質面團呈現很強的非牛頓性，剪切速率、溫度和含水率對表觀黏度影響顯著；表觀黏度隨剪切速率的增大而減小，隨含水率的增大而減小，溫度低於120時，隨溫度的升高而減小，溫度高於120時，隨溫度的升高而增大。 -
A fluid cannot withstand a shear.
流體不能承受切應力。 -
Based on the analysis of thin sections by microscope, measurement of porosity and density, and geological setting, we tested the rock physical parameters of sandstone, siltstone, carbonate and other transitional sedimentary rocks by the mts system under formation conditions ( temperatures, pressures and pore fluid properties ). the rocks we tested are from tertiary ( including zhujiang formation, zhuhai formation, enping formation, hanjiang formation ) of zhujiangkou basin in southern china sea. according to the analysis results, we studied the main ultrasonic wave velocity characters of rocks, which are compressive and shear wave velocity and poisson ' s ratio under different formation conditions
在對珠江口盆地第三系儲集巖進行顯微鏡薄片分析、孔隙度和密度分析，以及地質背景分析的基礎上，利用巖石物理參數測試系統（ mts ）模擬地層條件（溫度、壓力和孔隙流體狀況）測試了珠江口盆地第三系（包括珠江組、珠海組、恩平組、韓江組，以下有關討論同）砂巖、粉砂巖、碳酸鹽巖及其過渡性巖石物理性質，重點研究了不同地層條件下巖石的聲學特徵（巖石的縱橫波速度和泊松比） 。 -
With regard to its field drilling applications in the geologically loose sandy pebble layers, kl vegetable - gum drilling fluid showed itself with excellent rheological behaviours in its abilities of lubrication, lost circulation, suspension and removal of debris, anti - shear shinning, and high coring rates, which satisfactorily meet the demands of geological boring in the dam foundation of huangjin ping hydroelectrical power plant
通過在黃金坪水電站壩基深厚砂卵石覆蓋層鉆探取芯的現場試驗，證明了kl植物膠沖洗液具有優良的流變特性，潤滑、堵漏、懸浮排除巖屑和抗剪切稀釋能力顯著，可實現高取芯率，能很好的滿足地質鉆探對取芯質量的要求。 -
There is a close relation between mesozoic tectonic evolution, fluid evolution, petrogenesis and mineralization in the manzhouli - e ' erguna region in the northeast of the northern orogenic belt, china, and three evolution stages of the mesozoic tectonic - fluid - petrogenetic and metallogenetic system are proposed out : 1 ) acompanied by ree and cu mineralization, the calc - alkaline volcanic rocks and mantle - crust mixed type granite occurred under the regional tension tectonic background caused by the mongolia - okhotsk residual ocean that was closing in scissors form in the early - middle jurassic. 2 ) acompanied by pb, zn and ag mineralization, the calc - alkaline and alkaline volcanic rocks occurred under the regional shear - compression tectonic background in the late jurassic. 3 ) acompanied by u, f, pb, zn and ag mineralization, the caic - alkaline and alkaline volcanic rocks occurred under the regional tension tectonic background in the early cretaceous
摘要本文討論了北方造山帶東北段滿洲里額爾古納地區及其毗鄰區中生代構造流體成巖成礦系統及其演化的三個不同階段： 1 ）早中侏羅世張性「似裂谷環境」下所形成的中基性堿性火山巖、同熔性花崗巖及深源流體活動形成的稀土礦床和斑巖性銅鋁礦床； 2 ）晚侏羅世擠壓剪切環境下所形成的酸性火山巖、斑巖類及深源流體活動所形成的鉛鋅銀礦床； 3 ）早白堊世張性環境下所形成的基性堿性火山巖及深源流體活動所形成的鈾礦床、金銀礦床及螢石礦床。 -
For newtonian fluid, the influence of the plate undulations, the reynolds number and the thickness of the film are shown by parameter studies ; for non - newtonian fluid, the shear - thinning coefficient on the film flow is shown by parameter studies
在薄膜流動過程中，考慮波形板的輪廓形狀參數變化、流動中雷諾數的大小、薄膜厚度的變化以及非牛頓流體的剪切變稀系數對薄膜流動的流變特性影響。 -
In order to understand the effect of alternating magnetic field on the dynamic performance of a disk - type magnetorheological ( mr ) fluid damper based on shear operation, the dynamic character of a flexible rotor supported on the disk - type mr fluid damper was experimentally studied under sinusoidal magnetic field
摘要為了掌握交變磁場對基於剪切方式的盤型磁流變（ mr ）流體阻尼器動力特性的影響，試驗研究了正弦磁場下支承在盤型磁流變流體阻尼器上的柔性轉子系統的動力特性。 -
Test method for subjecting marine antifouling coating to biofouling and fluid shear forces in natural seawater
在天然海水中使船隻防污塗層遭受生物污垢和流體剪切力的試驗方法 -
In order to study the direct relation between oil - base drilling fluid performance and cement job quality, a new developed evaluation method ( artificial core method ) was adopted ; the effects of the oil - base drilling fluid system and its main components on the shear cementing strengths of the first and second interfaces in cementing operation were investigated ; and those of the different mix slurry ratios on the gel strength, initial set time, final set time of slurry and the compressive strength of bond cement were examined too
摘要為了研究油基鉆井液性能和固井質量之間的直接關系，採用新建立的評價方法人工巖心法，考察了油基鉆井液體系及其主要組分對固井作業中第一、第二界面剪切膠結強度的影響規律，以及不同混漿比例下對水泥漿膠凝強度、初凝時間、終凝時間和水泥石抗壓強度的影響規律。 -
Numerical viscoelastic modeling for porphyroclast rotation in ductile shear zones is done by a viscoelastic finite element program based on detailed investigation to three ductile shear zones, the taihangshan mountains, north china. in this model porphyroclast garnet is assumed as isotropic elastic material with small elastic deformation, while the matrix quartz, feldspar as viscous fluid maxwell material which has increasing deformation with time. the viscosity of matrix is supposed to be 10
採用粘彈性力學分析程序對太行山阜平地區剪切帶中斑晶旋轉問題進行了有限元數值模擬。在計算模型中假定：石榴石斑晶為彈性材料，在應力作用下只產生很小的彈性變形石英長石質的基質部分為粘彈性材料，它具有隨時間變形不斷增大的特性。 -
Numerical results show that the bubble concentration distribution can be predicted by using the two - way coupling of the fluid and the bubble motion, and adding the wall lift force into the bubble motion equation, and the fluid velocity, turbulence intensity and shear stresses modified by the bubble motions can also be revealed
數值模擬結果表明，通過加入壁面升力和採用雙向耦合方法，可以較準確地預測氣泡濃度分佈和揭示氣泡流動對流體湍流結構的影響。 -
The raw cement slurry is a kind of two - phase solid - liquid suspension. from the relation of shear stress and shear velocity, it ' s belong to noi ? ncwtonian fluid
水泥生料漿是一種固液兩相懸浮液，從流體的剪切應力與剪切速率的關系來分析，它是屬于非牛頓液體范疇。 -
The main contributions of the dissertation are as follows : on the basis of experimental results, the operational effects, such as the magnitude of magnetic field, the temperature and the rate of shear strain, on the shear stress of the mr fluid are shown and models of the quasi - bingham model and a nonlinear model for the shear stress of the mr fluid also are developed, in which the characteristic of " shear - thin " of the mr fluid is described
論文的主要貢獻如下：通過測試磁流變液剪切應力與磁感強度、剪切應變速率、溫度的變化規律，建立了能反映磁流變液剪切變稀現象的剪切應力與剪切應變速率的磁流變液模型。根據磁流變液模型，從理論上建立了能在較寬的電壓內范圍比較準確地預報磁流變阻尼器輸出力的近似公式。 -
On this condition, we exert two different levels of fluid shear stress ( 4 dyns / cm2and 15 dyns / cm2 ) to them by a parallel plate flow chamber and observe the change of apoptosis of endothelial cells by tunel. we demonstrate that high level shear stress can inhibit the apoptosis induced by lps, whereas low level shear stress was less effective
在此基礎上，將兩種不同大小剪切力與lps共同作用於細胞，發現高水平剪切力（ 15dyn cm ~ 2 ）可以抑制lps誘導的凋亡，而低水平剪切力（ 4dyn cm ~ 2 ）的效果則不明顯。 -
From the view of cellular rheology, we examined the influence of fluid shear stress on the metabolism, morphology, structure and function of endothelia cells in our previous research. it is first time for us to develop the research between shear stress and apoptosis. in this study, we stimulate the human umbilical venous endothelial cells ( huvec ) by lps and apply different levels of fluid shear stress to them by a parallel plate flow chamber, then observe the change of apoptosis of endothelial cells by terminal deoxynucleotidyl transferase mediated dutp nick end labeling ( tunel )
我們從細胞力學的角度，曾對血管內皮細胞在剪切力作用下的代謝、形態、結構及功能等進行過系統研究，但剪切力與內皮細胞凋亡的相關研究尚屬首次，我們希望通過探討細胞凋亡與剪切力大小及作用時間的關系，為探索剪切力對血管內皮細胞信號轉導的影響及作用機理提供有價值的參考數據和實驗資料。 -
Results ( 1 ) el - 8 mrna did not express in huvecs untreated with fluid shear stress
23dyne兒m勺時k七inrna表達量時為1
分享友人